Moved discussion XBlock to edx-platform

(cherry picked from commit a7c0a2a)

cms/djangoapps/contentstore/views/helpers.py

@@ -38,14 +38,6 @@ GRADER_TYPES = {
 }
 
 
-# Add Discussion templates
-add_lookup('lms.main', 'templates', package='discussion_app')
-
-
-# Add Discussion templates
-add_lookup('lms.main', 'templates', package='discussion_app')
-
-
 # points to the temporary course landing page with log in and sign up
 def landing(request, org, course, coursename):
     return render_to_response('temp-course-landing.html', {})

common/djangoapps/edxmako/startup.py

@@ -17,6 +17,3 @@ def run():
         clear_lookups(namespace)
         for directory in directories:
             add_lookup(namespace, directory)
-
-    # Add Discussion templates
-    add_lookup('main', 'templates', package='discussion_app')

common/lib/xblock/discussion/discussion_forum/__init__.py

+from .discussion_forum import DiscussionXBlock, DiscussionCourseXBlock

common/lib/xblock/discussion/discussion_forum/discussion_forum.py

+import logging
+
+from xblock.core import XBlock
+from xblock.fields import Scope, String
+from xblock.fragment import Fragment
+
+from .utils import (
+    render_template,
+    render_mako_template,
+    render_mustache_templates,
+    get_js_urls, get_css_urls,
+    asset_to_static_url
+)
+
+log = logging.getLogger(__name__)
+
+
+@XBlock.needs('discussion')
+class DiscussionXBlock(XBlock):
+    """ Provides functionality similar to discussion XModule in inline mode """
+    display_name = String(
+        display_name="Display Name",
+        help="Display name for this module",
+        default="Discussion",
+        scope=Scope.settings
+    )
+    data = String(
+        help="XML data for the problem",
+        scope=Scope.content,
+        default="<discussion></discussion>"
+    )
+    discussion_category = String(
+        display_name="Category",
+        default="Week 1",
+        help="A category name for the discussion. This name appears in the left pane of the discussion forum for the course.",
+        scope=Scope.settings
+    )
+    discussion_target = String(
+        display_name="Subcategory",
+        default="Topic-Level Student-Visible Label",
+        help="A subcategory name for the discussion. This name appears in the left pane of the discussion forum for the course.",
+        scope=Scope.settings
+    )
+    sort_key = String(scope=Scope.settings)
+
+    @property
+    def discussion_id(self):
+        """
+        :return: int discussion id
+        """
+        return self.scope_ids.usage_id.block_id
+
+    @property
+    def course_id(self):
+        """
+        :return: int course id
+        """
+        # TODO really implement this
+        # pylint: disable=no-member
+        if hasattr(self, 'xmodule_runtime'):
+            if hasattr(self.xmodule_runtime.course_id, 'to_deprecated_string'):
+                return self.xmodule_runtime.course_id.to_deprecated_string()
+            else:
+                return self.xmodule_runtime.course_id
+        return 'foo'
+
+    def student_view(self, context=None):  # pylint: disable=unused-argument
+        """ Renders student view for LMS and Studio """
+        # pylint: disable=no-member
+        if hasattr(self, 'xmodule_runtime') and getattr(self.xmodule_runtime, 'is_author_mode', False):
+            fragment = self._student_view_studio()
+        else:
+            fragment = self._student_view_lms()
+
+        return fragment
+
+    def _student_view_lms(self):
+        """ Renders student view for LMS """
+        fragment = Fragment()
+        discussion_service = self.xmodule_runtime.service(self, 'discussion')  # pylint: disable=no-member
+        context = discussion_service.get_inline_template_context(self.discussion_id)
+        context['discussion_id'] = self.discussion_id
+
+        fragment.add_content(render_mako_template('discussion/_discussion_inline.html', context))
+
+        for url in get_js_urls():
+            fragment.add_javascript_url(url)
+        for url in get_css_urls():
+            fragment.add_css_url(url)
+
+        fragment.add_javascript(render_template('static/js/discussion_inline.js', {'course_id': self.course_id}))
+        fragment.add_content(render_mustache_templates())
+
+        fragment.initialize_js('DiscussionInlineBlock')
+
+        return fragment
+
+    def _student_view_studio(self):
+        """ Renders student view for Studio """
+        fragment = Fragment()
+        fragment.add_content(render_mako_template(
+            'discussion/_discussion_inline_studio.html',
+            {'discussion_id': self.discussion_id}
+        ))
+        fragment.add_css_url(asset_to_static_url('xblock/discussion/css/discussion-studio.css'))
+        return fragment
+
+    @XBlock.json_handler
+    def studio_submit(self, data, suffix=''):  # pylint: disable=unused-argument
+        """ Handles Studio submit event """
+        log.info("submitted: {}".format(data))
+        self.display_name = data.get("display_name", "Untitled Discussion Topic")
+        self.discussion_category = data.get("discussion_category", None)
+        self.discussion_target = data.get("discussion_target", None)
+        return {
+            "display_name": self.display_name,
+            "discussion_category": self.discussion_category,
+            "discussion_target": self.discussion_target
+        }
+
+    def studio_view(self, context=None):  # pylint: disable=unused-argument
+        """ Renders author view for Studio """
+        fragment = Fragment()
+        context = {
+            "display_name": self.display_name,
+            "discussion_category": self.discussion_category,
+            "discussion_target": self.discussion_target
+        }
+        log.info("rendering template in context: {}".format(context))
+        fragment.add_content(render_mako_template('discussion/discussion_inline_edit.html', context))
+        fragment.add_javascript_url(asset_to_static_url('xblock/discussion/js/discussion_inline_edit.js'))
+
+        fragment.initialize_js('DiscussionEditBlock')
+        return fragment
+
+    @staticmethod
+    def workbench_scenarios():
+        """A canned scenario for display in the workbench."""
+        return [
+            ("Discussion XBlock",
+             """<vertical_demo>
+                <discussion-forum/>
+                </vertical_demo>
+             """),
+        ]
+
+
+@XBlock.needs('discussion')
+class DiscussionCourseXBlock(XBlock):
+    """ Provides functionality similar to discussion XModule in tab mode """
+    display_name = String(
+        display_name="Display Name",
+        help="Display name for this module",
+        default="Discussion Course",
+        scope=Scope.settings
+    )
+
+    def student_view(self, context=None):  # pylint: disable=unused-argument
+        """ Renders student view for LMS and Studio """
+        # pylint: disable=no-member
+        if hasattr(self, 'xmodule_runtime') and getattr(self.xmodule_runtime, 'is_author_mode', False):
+            fragment = self._student_view_studio()
+        else:
+            fragment = self._student_view_lms()
+
+        return fragment
+
+    def _student_view_lms(self):
+        """ Renders student view for LMS """
+        fragment = Fragment()
+        fragment.add_css_url(asset_to_static_url('xblock/discussion/css/discussion-course-custom.css'))
+
+        discussion_service = self.xmodule_runtime.service(self, 'discussion')  # pylint: disable=no-member
+        context = discussion_service.get_course_template_context()
+        context['enable_new_post_btn'] = True
+
+        fragment.add_content(render_mako_template('discussion/_discussion_course.html', context))
+
+        fragment.add_javascript(render_template('static/js/discussion_course.js', {
+            'course_id': self.course_id
+        }))
+
+        fragment.add_content(render_mustache_templates())
+
+        for url in get_js_urls():
+            fragment.add_javascript_url(url)
+
+        for url in get_css_urls():
+            fragment.add_css_url(url)
+
+        fragment.initialize_js('DiscussionCourseBlock')
+
+        return fragment
+
+    def _student_view_studio(self):
+        """ Renders student view for Studio """
+        fragment = Fragment()
+        fragment.add_content(render_mako_template('discussion/_discussion_course_studio.html'))
+        fragment.add_css_url(asset_to_static_url('xblock/discussion/css/discussion-studio.css'))
+        return fragment
+
+    def studio_view(self, context=None):  # pylint: disable=unused-argument
+        """ Renders author view Studio """
+        return Fragment()

common/lib/xblock/discussion/discussion_forum/static/js/discussion_course.js

+var $$course_id = "{{course_id}}";
+
+function DiscussionCourseBlock(runtime, element) {
+  var el = $(element).find('section.discussion');
+  el.data('pushState', 'false');
+
+  var testUrl = runtime.handlerUrl(element, 'test');
+  if (testUrl.match(/^(http|https):\/\//)) {
+    var hostname = testUrl.match(/^(.*:\/\/[a-z\-.]+)\//)[1];
+    DiscussionUtil.setBaseUrl(hostname);
+  }
+}

common/lib/xblock/discussion/discussion_forum/static/js/discussion_inline.js

+var $$course_id = "{{course_id}}";
+
+function DiscussionInlineBlock(runtime, element) {
+  var el = $(element).find('.discussion-module');
+
+  var testUrl = runtime.handlerUrl(element, 'test');
+  if (testUrl.match(/^(http|https):\/\//)) {
+    var hostname = testUrl.match(/^(.*:\/\/[a-z\-.]+)\//)[1];
+    DiscussionUtil.setBaseUrl(hostname);
+  }
+
+  new DiscussionModuleView({
+    el: el,
+    async_thread_views: true
+  });
+}

common/lib/xblock/discussion/discussion_forum/utils.py

+import os
+import pkg_resources
+from django.templatetags.static import static
+
+from edxmako.shortcuts import render_to_string
+from django.template import Context, Template
+
+from django.conf import settings
+
+from mako.template import Template as MakoTemplate
+
+JS_URLS = [
+    # VENDOR
+    'js/vendor/URI.min.js',
+    'js/vendor/jquery.leanModal.min.js',
+    'js/vendor/jquery.timeago.js',
+    'js/vendor/underscore-min.js',
+    'js/vendor/backbone-min.js',
+    'js/vendor/mustache.js',
+
+    'xblock/discussion/js/vendor/split.js',
+    'xblock/discussion/js/vendor/i18n.js',
+    'xblock/discussion/js/vendor/Markdown.Converter.js',
+    'xblock/discussion/js/vendor/Markdown.Sanitizer.js',
+    'xblock/discussion/js/vendor/Markdown.Editor.js',
+    'xblock/discussion/js/vendor/mathjax_delay_renderer.js',
+    'xblock/discussion/js/vendor/customwmd.js',
+]
+
+CSS_URLS = [
+    # 'xblock/discussion/css/discussion-app.css',
+    'xblock/discussion/css/vendor/font-awesome.css'
+]
+
+
+def load_resource(resource_path):
+    """
+    Gets the content of a resource
+    """
+    resource_content = pkg_resources.resource_string('discussion_forum', resource_path)
+    return unicode(resource_content)
+
+
+def render_template(template_path, context=None):
+    """
+    Evaluate a template by resource path, applying the provided context
+    """
+    template_str = load_resource(template_path)
+    template = Template(template_str)
+    return template.render(Context(context if context else {}))
+
+
+def render_mako_template(template_path, context=None):
+    """
+    Evaluate a mako template by resource path, applying the provided context
+    """
+    return render_to_string(template_path, context if context else {})
+
+
+def render_mustache_templates():
+    """ Renders all mustache templates as script tags """
+    mustache_dir = settings.COMMON_ROOT / 'templates' / 'discussion' / 'mustache'
+
+    def is_valid_file_name(file_name):
+        """ Checks if file is a mustache template """
+        return file_name.endswith('.mustache')
+
+    def read_file(file_name):
+        """ Reads file and decodes it's content """
+        return open(mustache_dir + '/' + file_name, "r").read().decode('utf-8')
+
+    def template_id_from_file_name(file_name):
+        """ Generates template_id from file name """
+        return file_name.rpartition('.')[0]
+
+    def process_mako(template_content):
+        """ Creates and renders Mako template """
+        return MakoTemplate(template_content).render_unicode()
+
+    def make_script_tag(script_id, content):
+        """ Wraps content in script tag """
+        return u"<script type='text/template' id='{0}'>{1}</script>".format(script_id, content)
+
+    return u'\n'.join(
+        make_script_tag(template_id_from_file_name(file_name), process_mako(read_file(file_name)))
+        for file_name in os.listdir(mustache_dir)
+        if is_valid_file_name(file_name)
+    )
+
+
+def get_scenarios_from_path(scenarios_path, include_identifier=False):
+    """
+    Returns an array of (title, xmlcontent) from files contained in a specified directory,
+    formatted as expected for the return value of the workbench_scenarios() method
+    """
+    base_fullpath = os.path.dirname(os.path.realpath(__file__))
+    scenarios_fullpath = os.path.join(base_fullpath, scenarios_path)
+
+    scenarios = []
+    if os.path.isdir(scenarios_fullpath):
+        for template in os.listdir(scenarios_fullpath):
+            if not template.endswith('.xml'):
+                continue
+            identifier = template[:-4]
+            title = identifier.replace('_', ' ').title()
+            template_path = os.path.join(scenarios_path, template)
+            if not include_identifier:
+                scenarios.append((title, load_resource(template_path)))
+            else:
+                scenarios.append((identifier, title, load_resource(template_path)))
+
+    return scenarios
+
+
+def load_scenarios_from_path(scenarios_path):
+    """
+    Load all xml files contained in a specified directory, as workbench scenarios
+    """
+    return get_scenarios_from_path(scenarios_path, include_identifier=True)
+
+
+def get_js_urls():
+    """ Returns a list of all additional javascript files """
+    return [asset_to_static_url(path) for path in JS_URLS]
+
+
+def get_css_urls():
+    """ Returns a list of all additional css files """
+    return [asset_to_static_url(path) for path in CSS_URLS]
+
+
+def asset_to_static_url(asset_path):
+    """
+    :param str asset_path: path to asset
+    :return: str|unicode url of asset
+    """
+    return static(asset_path)

common/lib/xblock/discussion/setup.py

+"""Setup for discussion-forum XBlock."""
+
+import os
+from setuptools import setup
+
+
+def package_data(pkg, root_list):
+    """Generic function to find package_data for `pkg` under `root`."""
+    data = []
+    for root in root_list:
+        for dirname, _, files in os.walk(os.path.join(pkg, root)):
+            for fname in files:
+                data.append(os.path.relpath(os.path.join(dirname, fname), pkg))
+
+    return {pkg: data}
+
+
+setup(
+    name='xblock-discussion',
+    version='0.1',
+    description='XBlock - Discussion Forum',
+    packages=[
+        'discussion_forum'
+    ],
+    install_requires=[
+        'XBlock',
+    ],
+    entry_points={
+        'xblock.v1': [
+            'discussion-forum = discussion_forum:DiscussionXBlock',
+            'discussion-course = discussion_forum:DiscussionCourseXBlock'
+        ]
+    },
+    package_data=package_data("discussion_forum", ["static"]),
+)

common/lib/xmodule/xmodule/discussion_module.py

@@ -59,9 +59,9 @@ class DiscussionModule(DiscussionFields, XModule):
             'course': self.get_course(),
         }
         if getattr(self.system, 'is_author_mode', False):
-            template = '/discussion/_discussion_inline_studio.html'
+            template = 'discussion/_discussion_inline_studio.html'
         else:
-            template = '/discussion/_discussion_inline.html'
+            template = 'discussion/_discussion_inline.html'
         return self.system.render_template(template, context)
 
     def get_course(self):

common/lib/xmodule/xmodule/x_module.py

@@ -1404,6 +1404,9 @@ class DescriptorSystem(MetricsMixin, ConfigurableFragmentWrapper, Runtime):  # p
         return result
 
     def handler_url(self, block, handler_name, suffix='', query='', thirdparty=False):
+        if block.xmodule_runtime is not None:
+            return block.xmodule_runtime.handler_url(block, handler_name, suffix, query, thirdparty)
+        else:
             # Currently, Modulestore is responsible for instantiating DescriptorSystems
             # This means that LMS/CMS don't have a way to define a subclass of DescriptorSystem
             # that implements the correct handler url. So, for now, instead, we will reference a
@@ -1414,6 +1417,9 @@ class DescriptorSystem(MetricsMixin, ConfigurableFragmentWrapper, Runtime):  # p
         """
         See :meth:`xblock.runtime.Runtime:local_resource_url` for documentation.
         """
+        if block.xmodule_runtime is not None:
+            return block.xmodule_runtime.local_resource_url(block, uri)
+        else:
             # Currently, Modulestore is responsible for instantiating DescriptorSystems
             # This means that LMS/CMS don't have a way to define a subclass of DescriptorSystem
             # that implements the correct local_resource_url. So, for now, instead, we will reference a
@@ -1436,6 +1442,13 @@ class DescriptorSystem(MetricsMixin, ConfigurableFragmentWrapper, Runtime):  # p
         """
         raise NotImplementedError("edX Platform doesn't currently implement XBlock resource urls")
 
+    def publish(self, block, event_type, event):
+        """
+        See :meth:`xblock.runtime.Runtime:publish` for documentation.
+        """
+        if block.xmodule_runtime is not None:
+            return block.xmodule_runtime.publish(block, event_type, event)
+
     def add_block_as_child_node(self, block, node):
         child = etree.SubElement(node, "unknown")
         child.set('url_name', block.url_name)

common/static/coffee/spec/discussion/view/discussion_thread_edit_view_spec.js

@@ -62,7 +62,7 @@
         testCancel = function(view) {
             view.$('.post-cancel').click();
             expect($('.edit-post-form')).not.toExist();
-        }
+        };
 
         it('can close the view in tab mode', function() {
             this.createEditView();

common/static/coffee/src/discussion/discussion_module_view.coffee

@@ -11,7 +11,7 @@ if Backbone?
 
     paginationTemplate: -> DiscussionUtil.getTemplate("_pagination")
     page_re: /\?discussion_page=(\d+)/
-    initialize: ->
+    initialize: (options) =>
       @toggleDiscussionBtn = @$(".discussion-show")
       # Set the page if it was set in the URL. This is used to allow deep linking to pages
       match = @page_re.exec(window.location.href)
@@ -19,6 +19,7 @@ if Backbone?
         @page = parseInt(match[1])
       else
         @page = 1
+      @options = options
 
     toggleNewPost: (event) =>
       event.preventDefault()
@@ -96,8 +97,8 @@ if Backbone?
         @$('section.discussion').replaceWith($discussion)
       else
         @$el.append($discussion)
-
       @newPostForm = this.$el.find('.new-post-article')
+      async = @options.async_thread_views
       @threadviews = @discussion.map (thread) =>
         view = new DiscussionThreadView(
           el: @$("article#thread_#{thread.id}"),

common/static/coffee/src/discussion/main.coffee

 if Backbone?
   DiscussionApp =
-    start: (elem)->
+    start: (elem, pushState = true)->
       # TODO: Perhaps eliminate usage of global variables when possible
       DiscussionUtil.loadRolesFromContainer()
       element = $(elem)
@@ -17,7 +17,7 @@ if Backbone?
       discussion = new Discussion(threads, {pages: thread_pages, sort: sort_preference})
       course_settings = new DiscussionCourseSettings(element.data("course-settings"))
       new DiscussionRouter({discussion: discussion, course_settings: course_settings})
-      Backbone.history.start({pushState: true, root: "/courses/#{$$course_id}/discussion/forum/"})
+      Backbone.history.start({pushState: pushState, root: "/courses/#{$$course_id}/discussion/forum/"})
   DiscussionProfileApp =
     start: (elem) ->
       # Roles are not included in user profile page, but they are not used for anything
@@ -32,6 +32,7 @@ if Backbone?
       new DiscussionUserProfileView(el: element, collection: threads, page: page, numPages: numPages)
   $ ->
     $("section.discussion").each (index, elem) ->
-      DiscussionApp.start(elem)
+      pushState = $(elem).data('pushState') != 'false'
+      DiscussionApp.start(elem, pushState)
     $("section.discussion-user-threads").each (index, elem) ->
       DiscussionProfileApp.start(elem)

common/static/coffee/src/discussion/views/discussion_thread_view.coffee

@@ -22,6 +22,8 @@ if Backbone?
       if @mode not in ["tab", "inline"]
         throw new Error("invalid mode: " + @mode)
 
+      @async_thread_views = if options.async_thread_views? then options.async_thread_views else false
+
       # Quick fix to have an actual model when we're receiving new models from
       # the server.
       @model.collection.on "reset", (collection) =>
@@ -231,7 +233,7 @@ if Backbone?
 
     renderResponseToList: (response, listSelector, options) =>
         response.set('thread', @model)
-        view = new ThreadResponseView($.extend({model: response}, options))
+        view = new ThreadResponseView($.extend({model: response, async: @async_thread_views}, options))
         view.on "comment:add", @addComment
         view.on "comment:endorse", @endorseThread
         view.render()
@@ -265,7 +267,6 @@ if Backbone?
       comment = new Comment(body: body, created_at: (new Date()).toISOString(), username: window.user.get("username"), votes: { up_count: 0 }, abuse_flaggers:[], endorsed: false, user_id: window.user.get("id"))
       comment.set('thread', @model.get('thread'))
       @renderResponseToList(comment, ".js-response-list")
-      @renderAttrs()
       @model.addComment()
       @renderAddResponseButton()
 

common/static/coffee/src/discussion/views/thread_response_view.coffee

@@ -12,6 +12,7 @@ if Backbone?
 
     initialize: (options) ->
       @collapseComments = options.collapseComments
+      @async = if options.async? then options.async else false;
       @createShowView()
 
     renderTemplate: ->
@@ -199,7 +200,7 @@ if Backbone?
           url: url
           type: "POST"
           dataType: 'json'
-          async: false # TODO when the rest of the stuff below is made to work properly..
+          async: @async # TODO when the rest of the stuff below is made to work properly..
           data:
               body: newBody
           error: DiscussionUtil.formErrorHandler(@$(".edit-post-form-errors"))

common/static/xblock/discussion/css/discussion-course-custom.css

+/* Some fixes that should only be applied when using discussion as an xblock */
+
+.discussion-body .sort-bar li {
+    margin: 4px 0px 0 0 !important;
+}
+
+.discussion-body .post-list a .title {
+    width: 60% !important;
+}
+
+div.discussion-body div.forum-nav div.forum-nav-thread-list-wrapper ul.forum-nav-thread-list,
+div.discussion-body div.forum-nav div.forum-nav-browse-menu-wrapper ul.forum-nav-browse-menu,
+div.discussion-body div.forum-nav div.forum-nav-thread-list-wrapper ul.forum-nav-thread-list ul
+{
+    padding-left: 0;
+    list-style: none;
+}
+
+div.discussion-body div.forum-nav div.forum-nav-browse-menu-wrapper ul.forum-nav-browse-submenu {
+    list-style: none
+}
+
+div.discussion-body div.forum-nav div.forum-nav-thread-list-wrapper ul.forum-nav-thread-list li {
+    margin-bottom: 0;
+}

common/static/xblock/discussion/css/discussion-studio.css

+.discussion-module {
+    display: block;
+    border: none;
+    box-shadow: none;
+    line-height: 1.4;
+    position: relative;
+    margin: 20px 0;
+    padding: 20px;
+    background: #f6f6f6;
+    border-radius: 3px;
+}

common/static/xblock/discussion/css/vendor/font-awesome.css

+/*!
+ *  Font Awesome 3.2.1
+ *  the iconic font designed for Bootstrap
+ *  ------------------------------------------------------------------------------
+ *  The full suite of pictographic icons, examples, and documentation can be
+ *  found at http://fontawesome.io.  Stay up to date on Twitter at
+ *  http://twitter.com/fontawesome.
+ *
+ *  License
+ *  ------------------------------------------------------------------------------
+ *  - The Font Awesome font is licensed under SIL OFL 1.1 -
+ *    http://scripts.sil.org/OFL
+ *  - Font Awesome CSS, LESS, and SASS files are licensed under MIT License -
+ *    http://opensource.org/licenses/mit-license.html
+ *  - Font Awesome documentation licensed under CC BY 3.0 -
+ *    http://creativecommons.org/licenses/by/3.0/
+ *  - Attribution is no longer required in Font Awesome 3.0, but much appreciated:
+ *    "Font Awesome by Dave Gandy - http://fontawesome.io"
+ *
+ *  Author - Dave Gandy
+ *  ------------------------------------------------------------------------------
+ *  Email: dave@fontawesome.io
+ *  Twitter: http://twitter.com/davegandy
+ *  Work: Lead Product Designer @ Kyruus - http://kyruus.com
+ */
+/* FONT PATH
+ * -------------------------- */
+@font-face {
+  font-family: 'FontAwesome';
+  src: url('../../fonts/vendor/fontawesome-webfont.eot?v=3.2.1');
+  src: url('../../fonts/vendor/fontawesome-webfont.eot?#iefix&v=3.2.1') format('embedded-opentype'), url('../../fonts/vendor/fontawesome-webfont.woff?v=3.2.1') format('woff'), url('../../fonts/vendor/fontawesome-webfont.ttf?v=3.2.1') format('truetype'), url('../../fonts/vendor/fontawesome-webfont.svg#fontawesomeregular?v=3.2.1') format('svg');
+  font-weight: normal;
+  font-style: normal;
+}
+/* FONT AWESOME CORE
+ * -------------------------- */
+[class^="icon-"],
+[class*=" icon-"] {
+  font-family: FontAwesome;
+  font-weight: normal;
+  font-style: normal;
+  text-decoration: inherit;
+  -webkit-font-smoothing: antialiased;
+  *margin-right: .3em;
+}
+[class^="icon-"]:before,
+[class*=" icon-"]:before {
+  text-decoration: inherit;
+  display: inline-block;
+  speak: none;
+}
+/* makes the font 33% larger relative to the icon container */
+.icon-large:before {
+  vertical-align: -10%;
+  font-size: 1.3333333333333333em;
+}
+/* makes sure icons active on rollover in links */
+a [class^="icon-"],
+a [class*=" icon-"] {
+  display: inline;
+}
+/* increased font size for icon-large */
+[class^="icon-"].icon-fixed-width,
+[class*=" icon-"].icon-fixed-width {
+  display: inline-block;
+  width: 1.1428571428571428em;
+  text-align: right;
+  padding-right: 0.2857142857142857em;
+}
+[class^="icon-"].icon-fixed-width.icon-large,
+[class*=" icon-"].icon-fixed-width.icon-large {
+  width: 1.4285714285714286em;
+}
+.icons-ul {
+  margin-left: 2.142857142857143em;
+  list-style-type: none;
+}
+.icons-ul > li {
+  position: relative;
+}
+.icons-ul .icon-li {
+  position: absolute;
+  left: -2.142857142857143em;
+  width: 2.142857142857143em;
+  text-align: center;
+  line-height: inherit;
+}
+[class^="icon-"].hide,
+[class*=" icon-"].hide {
+  display: none;
+}
+.icon-muted {
+  color: #eeeeee;
+}
+.icon-light {
+  color: #ffffff;
+}
+.icon-dark {
+  color: #333333;
+}
+.icon-border {
+  border: solid 1px #eeeeee;
+  padding: .2em .25em .15em;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+.icon-2x {
+  font-size: 2em;
+}
+.icon-2x.icon-border {
+  border-width: 2px;
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  border-radius: 4px;
+}
+.icon-3x {
+  font-size: 3em;
+}
+.icon-3x.icon-border {
+  border-width: 3px;
+  -webkit-border-radius: 5px;
+  -moz-border-radius: 5px;
+  border-radius: 5px;
+}
+.icon-4x {
+  font-size: 4em;
+}
+.icon-4x.icon-border {
+  border-width: 4px;
+  -webkit-border-radius: 6px;
+  -moz-border-radius: 6px;
+  border-radius: 6px;
+}
+.icon-5x {
+  font-size: 5em;
+}
+.icon-5x.icon-border {
+  border-width: 5px;
+  -webkit-border-radius: 7px;
+  -moz-border-radius: 7px;
+  border-radius: 7px;
+}
+.pull-right {
+  float: right;
+}
+.pull-left {
+  float: left;
+}
+[class^="icon-"].pull-left,
+[class*=" icon-"].pull-left {
+  margin-right: .3em;
+}
+[class^="icon-"].pull-right,
+[class*=" icon-"].pull-right {
+  margin-left: .3em;
+}
+/* BOOTSTRAP SPECIFIC CLASSES
+ * -------------------------- */
+/* Bootstrap 2.0 sprites.less reset */
+[class^="icon-"],
+[class*=" icon-"] {
+  display: inline;
+  width: auto;
+  height: auto;
+  line-height: normal;
+  vertical-align: baseline;
+  background-image: none;
+  background-position: 0% 0%;
+  background-repeat: repeat;
+  margin-top: 0;
+}
+/* more sprites.less reset */
+.icon-white,
+.nav-pills > .active > a > [class^="icon-"],
+.nav-pills > .active > a > [class*=" icon-"],
+.nav-list > .active > a > [class^="icon-"],
+.nav-list > .active > a > [class*=" icon-"],
+.navbar-inverse .nav > .active > a > [class^="icon-"],
+.navbar-inverse .nav > .active > a > [class*=" icon-"],
+.dropdown-menu > li > a:hover > [class^="icon-"],
+.dropdown-menu > li > a:hover > [class*=" icon-"],
+.dropdown-menu > .active > a > [class^="icon-"],
+.dropdown-menu > .active > a > [class*=" icon-"],
+.dropdown-submenu:hover > a > [class^="icon-"],
+.dropdown-submenu:hover > a > [class*=" icon-"] {
+  background-image: none;
+}
+/* keeps Bootstrap styles with and without icons the same */
+.btn [class^="icon-"].icon-large,
+.nav [class^="icon-"].icon-large,
+.btn [class*=" icon-"].icon-large,
+.nav [class*=" icon-"].icon-large {
+  line-height: .9em;
+}
+.btn [class^="icon-"].icon-spin,
+.nav [class^="icon-"].icon-spin,
+.btn [class*=" icon-"].icon-spin,
+.nav [class*=" icon-"].icon-spin {
+  display: inline-block;
+}
+.nav-tabs [class^="icon-"],
+.nav-pills [class^="icon-"],
+.nav-tabs [class*=" icon-"],
+.nav-pills [class*=" icon-"],
+.nav-tabs [class^="icon-"].icon-large,
+.nav-pills [class^="icon-"].icon-large,
+.nav-tabs [class*=" icon-"].icon-large,
+.nav-pills [class*=" icon-"].icon-large {
+  line-height: .9em;
+}
+.btn [class^="icon-"].pull-left.icon-2x,
+.btn [class*=" icon-"].pull-left.icon-2x,
+.btn [class^="icon-"].pull-right.icon-2x,
+.btn [class*=" icon-"].pull-right.icon-2x {
+  margin-top: .18em;
+}
+.btn [class^="icon-"].icon-spin.icon-large,
+.btn [class*=" icon-"].icon-spin.icon-large {
+  line-height: .8em;
+}
+.btn.btn-small [class^="icon-"].pull-left.icon-2x,
+.btn.btn-small [class*=" icon-"].pull-left.icon-2x,
+.btn.btn-small [class^="icon-"].pull-right.icon-2x,
+.btn.btn-small [class*=" icon-"].pull-right.icon-2x {
+  margin-top: .25em;
+}
+.btn.btn-large [class^="icon-"],
+.btn.btn-large [class*=" icon-"] {
+  margin-top: 0;
+}
+.btn.btn-large [class^="icon-"].pull-left.icon-2x,
+.btn.btn-large [class*=" icon-"].pull-left.icon-2x,
+.btn.btn-large [class^="icon-"].pull-right.icon-2x,
+.btn.btn-large [class*=" icon-"].pull-right.icon-2x {
+  margin-top: .05em;
+}
+.btn.btn-large [class^="icon-"].pull-left.icon-2x,
+.btn.btn-large [class*=" icon-"].pull-left.icon-2x {
+  margin-right: .2em;
+}
+.btn.btn-large [class^="icon-"].pull-right.icon-2x,
+.btn.btn-large [class*=" icon-"].pull-right.icon-2x {
+  margin-left: .2em;
+}
+/* Fixes alignment in nav lists */
+.nav-list [class^="icon-"],
+.nav-list [class*=" icon-"] {
+  line-height: inherit;
+}
+/* EXTRAS
+ * -------------------------- */
+/* Stacked and layered icon */
+.icon-stack {
+  position: relative;
+  display: inline-block;
+  width: 2em;
+  height: 2em;
+  line-height: 2em;
+  vertical-align: -35%;
+}
+.icon-stack [class^="icon-"],
+.icon-stack [class*=" icon-"] {
+  display: block;
+  text-align: center;
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  font-size: 1em;
+  line-height: inherit;
+  *line-height: 2em;
+}
+.icon-stack .icon-stack-base {
+  font-size: 2em;
+  *line-height: 1em;
+}
+/* Animated rotating icon */
+.icon-spin {
+  display: inline-block;
+  -moz-animation: spin 2s infinite linear;
+  -o-animation: spin 2s infinite linear;
+  -webkit-animation: spin 2s infinite linear;
+  animation: spin 2s infinite linear;
+}
+/* Prevent stack and spinners from being taken inline when inside a link */
+a .icon-stack,
+a .icon-spin {
+  display: inline-block;
+  text-decoration: none;
+}
+@-moz-keyframes spin {
+  0% {
+    -moz-transform: rotate(0deg);
+  }
+  100% {
+    -moz-transform: rotate(359deg);
+  }
+}
+@-webkit-keyframes spin {
+  0% {
+    -webkit-transform: rotate(0deg);
+  }
+  100% {
+    -webkit-transform: rotate(359deg);
+  }
+}
+@-o-keyframes spin {
+  0% {
+    -o-transform: rotate(0deg);
+  }
+  100% {
+    -o-transform: rotate(359deg);
+  }
+}
+@-ms-keyframes spin {
+  0% {
+    -ms-transform: rotate(0deg);
+  }
+  100% {
+    -ms-transform: rotate(359deg);
+  }
+}
+@keyframes spin {
+  0% {
+    transform: rotate(0deg);
+  }
+  100% {
+    transform: rotate(359deg);
+  }
+}
+/* Icon rotations and mirroring */
+.icon-rotate-90:before {
+  -webkit-transform: rotate(90deg);
+  -moz-transform: rotate(90deg);
+  -ms-transform: rotate(90deg);
+  -o-transform: rotate(90deg);
+  transform: rotate(90deg);
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=1);
+}
+.icon-rotate-180:before {
+  -webkit-transform: rotate(180deg);
+  -moz-transform: rotate(180deg);
+  -ms-transform: rotate(180deg);
+  -o-transform: rotate(180deg);
+  transform: rotate(180deg);
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=2);
+}
+.icon-rotate-270:before {
+  -webkit-transform: rotate(270deg);
+  -moz-transform: rotate(270deg);
+  -ms-transform: rotate(270deg);
+  -o-transform: rotate(270deg);
+  transform: rotate(270deg);
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3);
+}
+.icon-flip-horizontal:before {
+  -webkit-transform: scale(-1, 1);
+  -moz-transform: scale(-1, 1);
+  -ms-transform: scale(-1, 1);
+  -o-transform: scale(-1, 1);
+  transform: scale(-1, 1);
+}
+.icon-flip-vertical:before {
+  -webkit-transform: scale(1, -1);
+  -moz-transform: scale(1, -1);
+  -ms-transform: scale(1, -1);
+  -o-transform: scale(1, -1);
+  transform: scale(1, -1);
+}
+/* ensure rotation occurs inside anchor tags */
+a .icon-rotate-90:before,
+a .icon-rotate-180:before,
+a .icon-rotate-270:before,
+a .icon-flip-horizontal:before,
+a .icon-flip-vertical:before {
+  display: inline-block;
+}
+/* Font Awesome uses the Unicode Private Use Area (PUA) to ensure screen
+   readers do not read off random characters that represent icons */
+.icon-glass:before {
+  content: "\f000";
+}
+.icon-music:before {
+  content: "\f001";
+}
+.icon-search:before {
+  content: "\f002";
+}
+.icon-envelope-alt:before {
+  content: "\f003";
+}
+.icon-heart:before {
+  content: "\f004";
+}
+.icon-star:before {
+  content: "\f005";
+}
+.icon-star-empty:before {
+  content: "\f006";
+}
+.icon-user:before {
+  content: "\f007";
+}
+.icon-film:before {
+  content: "\f008";
+}
+.icon-th-large:before {
+  content: "\f009";
+}
+.icon-th:before {
+  content: "\f00a";
+}
+.icon-th-list:before {
+  content: "\f00b";
+}
+.icon-ok:before {
+  content: "\f00c";
+}
+.icon-remove:before {
+  content: "\f00d";
+}
+.icon-zoom-in:before {
+  content: "\f00e";
+}
+.icon-zoom-out:before {
+  content: "\f010";
+}
+.icon-power-off:before,
+.icon-off:before {
+  content: "\f011";
+}
+.icon-signal:before {
+  content: "\f012";
+}
+.icon-gear:before,
+.icon-cog:before {
+  content: "\f013";
+}
+.icon-trash:before {
+  content: "\f014";
+}
+.icon-home:before {
+  content: "\f015";
+}
+.icon-file-alt:before {
+  content: "\f016";
+}
+.icon-time:before {
+  content: "\f017";
+}
+.icon-road:before {
+  content: "\f018";
+}
+.icon-download-alt:before {
+  content: "\f019";
+}
+.icon-download:before {
+  content: "\f01a";
+}
+.icon-upload:before {
+  content: "\f01b";
+}
+.icon-inbox:before {
+  content: "\f01c";
+}
+.icon-play-circle:before {
+  content: "\f01d";
+}
+.icon-rotate-right:before,
+.icon-repeat:before {
+  content: "\f01e";
+}
+.icon-refresh:before {
+  content: "\f021";
+}
+.icon-list-alt:before {
+  content: "\f022";
+}
+.icon-lock:before {
+  content: "\f023";
+}
+.icon-flag:before {
+  content: "\f024";
+}
+.icon-headphones:before {
+  content: "\f025";
+}
+.icon-volume-off:before {
+  content: "\f026";
+}
+.icon-volume-down:before {
+  content: "\f027";
+}
+.icon-volume-up:before {
+  content: "\f028";
+}
+.icon-qrcode:before {
+  content: "\f029";
+}
+.icon-barcode:before {
+  content: "\f02a";
+}
+.icon-tag:before {
+  content: "\f02b";
+}
+.icon-tags:before {
+  content: "\f02c";
+}
+.icon-book:before {
+  content: "\f02d";
+}
+.icon-bookmark:before {
+  content: "\f02e";
+}
+.icon-print:before {
+  content: "\f02f";
+}
+.icon-camera:before {
+  content: "\f030";
+}
+.icon-font:before {
+  content: "\f031";
+}
+.icon-bold:before {
+  content: "\f032";
+}
+.icon-italic:before {
+  content: "\f033";
+}
+.icon-text-height:before {
+  content: "\f034";
+}
+.icon-text-width:before {
+  content: "\f035";
+}
+.icon-align-left:before {
+  content: "\f036";
+}
+.icon-align-center:before {
+  content: "\f037";
+}
+.icon-align-right:before {
+  content: "\f038";
+}
+.icon-align-justify:before {
+  content: "\f039";
+}
+.icon-list:before {
+  content: "\f03a";
+}
+.icon-indent-left:before {
+  content: "\f03b";
+}
+.icon-indent-right:before {
+  content: "\f03c";
+}
+.icon-facetime-video:before {
+  content: "\f03d";
+}
+.icon-picture:before {
+  content: "\f03e";
+}
+.icon-pencil:before {
+  content: "\f040";
+}
+.icon-map-marker:before {
+  content: "\f041";
+}
+.icon-adjust:before {
+  content: "\f042";
+}
+.icon-tint:before {
+  content: "\f043";
+}
+.icon-edit:before {
+  content: "\f044";
+}
+.icon-share:before {
+  content: "\f045";
+}
+.icon-check:before {
+  content: "\f046";
+}
+.icon-move:before {
+  content: "\f047";
+}
+.icon-step-backward:before {
+  content: "\f048";
+}
+.icon-fast-backward:before {
+  content: "\f049";
+}
+.icon-backward:before {
+  content: "\f04a";
+}
+.icon-play:before {
+  content: "\f04b";
+}
+.icon-pause:before {
+  content: "\f04c";
+}
+.icon-stop:before {
+  content: "\f04d";
+}
+.icon-forward:before {
+  content: "\f04e";
+}
+.icon-fast-forward:before {
+  content: "\f050";
+}
+.icon-step-forward:before {
+  content: "\f051";
+}
+.icon-eject:before {
+  content: "\f052";
+}
+.icon-chevron-left:before {
+  content: "\f053";
+}
+.icon-chevron-right:before {
+  content: "\f054";
+}
+.icon-plus-sign:before {
+  content: "\f055";
+}
+.icon-minus-sign:before {
+  content: "\f056";
+}
+.icon-remove-sign:before {
+  content: "\f057";
+}
+.icon-ok-sign:before {
+  content: "\f058";
+}
+.icon-question-sign:before {
+  content: "\f059";
+}
+.icon-info-sign:before {
+  content: "\f05a";
+}
+.icon-screenshot:before {
+  content: "\f05b";
+}
+.icon-remove-circle:before {
+  content: "\f05c";
+}
+.icon-ok-circle:before {
+  content: "\f05d";
+}
+.icon-ban-circle:before {
+  content: "\f05e";
+}
+.icon-arrow-left:before {
+  content: "\f060";
+}
+.icon-arrow-right:before {
+  content: "\f061";
+}
+.icon-arrow-up:before {
+  content: "\f062";
+}
+.icon-arrow-down:before {
+  content: "\f063";
+}
+.icon-mail-forward:before,
+.icon-share-alt:before {
+  content: "\f064";
+}
+.icon-resize-full:before {
+  content: "\f065";
+}
+.icon-resize-small:before {
+  content: "\f066";
+}
+.icon-plus:before {
+  content: "\f067";
+}
+.icon-minus:before {
+  content: "\f068";
+}
+.icon-asterisk:before {
+  content: "\f069";
+}
+.icon-exclamation-sign:before {
+  content: "\f06a";
+}
+.icon-gift:before {
+  content: "\f06b";
+}
+.icon-leaf:before {
+  content: "\f06c";
+}
+.icon-fire:before {
+  content: "\f06d";
+}
+.icon-eye-open:before {
+  content: "\f06e";
+}
+.icon-eye-close:before {
+  content: "\f070";
+}
+.icon-warning-sign:before {
+  content: "\f071";
+}
+.icon-plane:before {
+  content: "\f072";
+}
+.icon-calendar:before {
+  content: "\f073";
+}
+.icon-random:before {
+  content: "\f074";
+}
+.icon-comment:before {
+  content: "\f075";
+}
+.icon-magnet:before {
+  content: "\f076";
+}
+.icon-chevron-up:before {
+  content: "\f077";
+}
+.icon-chevron-down:before {
+  content: "\f078";
+}
+.icon-retweet:before {
+  content: "\f079";
+}
+.icon-shopping-cart:before {
+  content: "\f07a";
+}
+.icon-folder-close:before {
+  content: "\f07b";
+}
+.icon-folder-open:before {
+  content: "\f07c";
+}
+.icon-resize-vertical:before {
+  content: "\f07d";
+}
+.icon-resize-horizontal:before {
+  content: "\f07e";
+}
+.icon-bar-chart:before {
+  content: "\f080";
+}
+.icon-twitter-sign:before {
+  content: "\f081";
+}
+.icon-facebook-sign:before {
+  content: "\f082";
+}
+.icon-camera-retro:before {
+  content: "\f083";
+}
+.icon-key:before {
+  content: "\f084";
+}
+.icon-gears:before,
+.icon-cogs:before {
+  content: "\f085";
+}
+.icon-comments:before {
+  content: "\f086";
+}
+.icon-thumbs-up-alt:before {
+  content: "\f087";
+}
+.icon-thumbs-down-alt:before {
+  content: "\f088";
+}
+.icon-star-half:before {
+  content: "\f089";
+}
+.icon-heart-empty:before {
+  content: "\f08a";
+}
+.icon-signout:before {
+  content: "\f08b";
+}
+.icon-linkedin-sign:before {
+  content: "\f08c";
+}
+.icon-pushpin:before {
+  content: "\f08d";
+}
+.icon-external-link:before {
+  content: "\f08e";
+}
+.icon-signin:before {
+  content: "\f090";
+}
+.icon-trophy:before {
+  content: "\f091";
+}
+.icon-github-sign:before {
+  content: "\f092";
+}
+.icon-upload-alt:before {
+  content: "\f093";
+}
+.icon-lemon:before {
+  content: "\f094";
+}
+.icon-phone:before {
+  content: "\f095";
+}
+.icon-unchecked:before,
+.icon-check-empty:before {
+  content: "\f096";
+}
+.icon-bookmark-empty:before {
+  content: "\f097";
+}
+.icon-phone-sign:before {
+  content: "\f098";
+}
+.icon-twitter:before {
+  content: "\f099";
+}
+.icon-facebook:before {
+  content: "\f09a";
+}
+.icon-github:before {
+  content: "\f09b";
+}
+.icon-unlock:before {
+  content: "\f09c";
+}
+.icon-credit-card:before {
+  content: "\f09d";
+}
+.icon-rss:before {
+  content: "\f09e";
+}
+.icon-hdd:before {
+  content: "\f0a0";
+}
+.icon-bullhorn:before {
+  content: "\f0a1";
+}
+.icon-bell:before {
+  content: "\f0a2";
+}
+.icon-certificate:before {
+  content: "\f0a3";
+}
+.icon-hand-right:before {
+  content: "\f0a4";
+}
+.icon-hand-left:before {
+  content: "\f0a5";
+}
+.icon-hand-up:before {
+  content: "\f0a6";
+}
+.icon-hand-down:before {
+  content: "\f0a7";
+}
+.icon-circle-arrow-left:before {
+  content: "\f0a8";
+}
+.icon-circle-arrow-right:before {
+  content: "\f0a9";
+}
+.icon-circle-arrow-up:before {
+  content: "\f0aa";
+}
+.icon-circle-arrow-down:before {
+  content: "\f0ab";
+}
+.icon-globe:before {
+  content: "\f0ac";
+}
+.icon-wrench:before {
+  content: "\f0ad";
+}
+.icon-tasks:before {
+  content: "\f0ae";
+}
+.icon-filter:before {
+  content: "\f0b0";
+}
+.icon-briefcase:before {
+  content: "\f0b1";
+}
+.icon-fullscreen:before {
+  content: "\f0b2";
+}
+.icon-group:before {
+  content: "\f0c0";
+}
+.icon-link:before {
+  content: "\f0c1";
+}
+.icon-cloud:before {
+  content: "\f0c2";
+}
+.icon-beaker:before {
+  content: "\f0c3";
+}
+.icon-cut:before {
+  content: "\f0c4";
+}
+.icon-copy:before {
+  content: "\f0c5";
+}
+.icon-paperclip:before,
+.icon-paper-clip:before {
+  content: "\f0c6";
+}
+.icon-save:before {
+  content: "\f0c7";
+}
+.icon-sign-blank:before {
+  content: "\f0c8";
+}
+.icon-reorder:before {
+  content: "\f0c9";
+}
+.icon-list-ul:before {
+  content: "\f0ca";
+}
+.icon-list-ol:before {
+  content: "\f0cb";
+}
+.icon-strikethrough:before {
+  content: "\f0cc";
+}
+.icon-underline:before {
+  content: "\f0cd";
+}
+.icon-table:before {
+  content: "\f0ce";
+}
+.icon-magic:before {
+  content: "\f0d0";
+}
+.icon-truck:before {
+  content: "\f0d1";
+}
+.icon-pinterest:before {
+  content: "\f0d2";
+}
+.icon-pinterest-sign:before {
+  content: "\f0d3";
+}
+.icon-google-plus-sign:before {
+  content: "\f0d4";
+}
+.icon-google-plus:before {
+  content: "\f0d5";
+}
+.icon-money:before {
+  content: "\f0d6";
+}
+.icon-caret-down:before {
+  content: "\f0d7";
+}
+.icon-caret-up:before {
+  content: "\f0d8";
+}
+.icon-caret-left:before {
+  content: "\f0d9";
+}
+.icon-caret-right:before {
+  content: "\f0da";
+}
+.icon-columns:before {
+  content: "\f0db";
+}
+.icon-sort:before {
+  content: "\f0dc";
+}
+.icon-sort-down:before {
+  content: "\f0dd";
+}
+.icon-sort-up:before {
+  content: "\f0de";
+}
+.icon-envelope:before {
+  content: "\f0e0";
+}
+.icon-linkedin:before {
+  content: "\f0e1";
+}
+.icon-rotate-left:before,
+.icon-undo:before {
+  content: "\f0e2";
+}
+.icon-legal:before {
+  content: "\f0e3";
+}
+.icon-dashboard:before {
+  content: "\f0e4";
+}
+.icon-comment-alt:before {
+  content: "\f0e5";
+}
+.icon-comments-alt:before {
+  content: "\f0e6";
+}
+.icon-bolt:before {
+  content: "\f0e7";
+}
+.icon-sitemap:before {
+  content: "\f0e8";
+}
+.icon-umbrella:before {
+  content: "\f0e9";
+}
+.icon-paste:before {
+  content: "\f0ea";
+}
+.icon-lightbulb:before {
+  content: "\f0eb";
+}
+.icon-exchange:before {
+  content: "\f0ec";
+}
+.icon-cloud-download:before {
+  content: "\f0ed";
+}
+.icon-cloud-upload:before {
+  content: "\f0ee";
+}
+.icon-user-md:before {
+  content: "\f0f0";
+}
+.icon-stethoscope:before {
+  content: "\f0f1";
+}
+.icon-suitcase:before {
+  content: "\f0f2";
+}
+.icon-bell-alt:before {
+  content: "\f0f3";
+}
+.icon-coffee:before {
+  content: "\f0f4";
+}
+.icon-food:before {
+  content: "\f0f5";
+}
+.icon-file-text-alt:before {
+  content: "\f0f6";
+}
+.icon-building:before {
+  content: "\f0f7";
+}
+.icon-hospital:before {
+  content: "\f0f8";
+}
+.icon-ambulance:before {
+  content: "\f0f9";
+}
+.icon-medkit:before {
+  content: "\f0fa";
+}
+.icon-fighter-jet:before {
+  content: "\f0fb";
+}
+.icon-beer:before {
+  content: "\f0fc";
+}
+.icon-h-sign:before {
+  content: "\f0fd";
+}
+.icon-plus-sign-alt:before {
+  content: "\f0fe";
+}
+.icon-double-angle-left:before {
+  content: "\f100";
+}
+.icon-double-angle-right:before {
+  content: "\f101";
+}
+.icon-double-angle-up:before {
+  content: "\f102";
+}
+.icon-double-angle-down:before {
+  content: "\f103";
+}
+.icon-angle-left:before {
+  content: "\f104";
+}
+.icon-angle-right:before {
+  content: "\f105";
+}
+.icon-angle-up:before {
+  content: "\f106";
+}
+.icon-angle-down:before {
+  content: "\f107";
+}
+.icon-desktop:before {
+  content: "\f108";
+}
+.icon-laptop:before {
+  content: "\f109";
+}
+.icon-tablet:before {
+  content: "\f10a";
+}
+.icon-mobile-phone:before {
+  content: "\f10b";
+}
+.icon-circle-blank:before {
+  content: "\f10c";
+}
+.icon-quote-left:before {
+  content: "\f10d";
+}
+.icon-quote-right:before {
+  content: "\f10e";
+}
+.icon-spinner:before {
+  content: "\f110";
+}
+.icon-circle:before {
+  content: "\f111";
+}
+.icon-mail-reply:before,
+.icon-reply:before {
+  content: "\f112";
+}
+.icon-github-alt:before {
+  content: "\f113";
+}
+.icon-folder-close-alt:before {
+  content: "\f114";
+}
+.icon-folder-open-alt:before {
+  content: "\f115";
+}
+.icon-expand-alt:before {
+  content: "\f116";
+}
+.icon-collapse-alt:before {
+  content: "\f117";
+}
+.icon-smile:before {
+  content: "\f118";
+}
+.icon-frown:before {
+  content: "\f119";
+}
+.icon-meh:before {
+  content: "\f11a";
+}
+.icon-gamepad:before {
+  content: "\f11b";
+}
+.icon-keyboard:before {
+  content: "\f11c";
+}
+.icon-flag-alt:before {
+  content: "\f11d";
+}
+.icon-flag-checkered:before {
+  content: "\f11e";
+}
+.icon-terminal:before {
+  content: "\f120";
+}
+.icon-code:before {
+  content: "\f121";
+}
+.icon-reply-all:before {
+  content: "\f122";
+}
+.icon-mail-reply-all:before {
+  content: "\f122";
+}
+.icon-star-half-full:before,
+.icon-star-half-empty:before {
+  content: "\f123";
+}
+.icon-location-arrow:before {
+  content: "\f124";
+}
+.icon-crop:before {
+  content: "\f125";
+}
+.icon-code-fork:before {
+  content: "\f126";
+}
+.icon-unlink:before {
+  content: "\f127";
+}
+.icon-question:before {
+  content: "\f128";
+}
+.icon-info:before {
+  content: "\f129";
+}
+.icon-exclamation:before {
+  content: "\f12a";
+}
+.icon-superscript:before {
+  content: "\f12b";
+}
+.icon-subscript:before {
+  content: "\f12c";
+}
+.icon-eraser:before {
+  content: "\f12d";
+}
+.icon-puzzle-piece:before {
+  content: "\f12e";
+}
+.icon-microphone:before {
+  content: "\f130";
+}
+.icon-microphone-off:before {
+  content: "\f131";
+}
+.icon-shield:before {
+  content: "\f132";
+}
+.icon-calendar-empty:before {
+  content: "\f133";
+}
+.icon-fire-extinguisher:before {
+  content: "\f134";
+}
+.icon-rocket:before {
+  content: "\f135";
+}
+.icon-maxcdn:before {
+  content: "\f136";
+}
+.icon-chevron-sign-left:before {
+  content: "\f137";
+}
+.icon-chevron-sign-right:before {
+  content: "\f138";
+}
+.icon-chevron-sign-up:before {
+  content: "\f139";
+}
+.icon-chevron-sign-down:before {
+  content: "\f13a";
+}
+.icon-html5:before {
+  content: "\f13b";
+}
+.icon-css3:before {
+  content: "\f13c";
+}
+.icon-anchor:before {
+  content: "\f13d";
+}
+.icon-unlock-alt:before {
+  content: "\f13e";
+}
+.icon-bullseye:before {
+  content: "\f140";
+}
+.icon-ellipsis-horizontal:before {
+  content: "\f141";
+}
+.icon-ellipsis-vertical:before {
+  content: "\f142";
+}
+.icon-rss-sign:before {
+  content: "\f143";
+}
+.icon-play-sign:before {
+  content: "\f144";
+}
+.icon-ticket:before {
+  content: "\f145";
+}
+.icon-minus-sign-alt:before {
+  content: "\f146";
+}
+.icon-check-minus:before {
+  content: "\f147";
+}
+.icon-level-up:before {
+  content: "\f148";
+}
+.icon-level-down:before {
+  content: "\f149";
+}
+.icon-check-sign:before {
+  content: "\f14a";
+}
+.icon-edit-sign:before {
+  content: "\f14b";
+}
+.icon-external-link-sign:before {
+  content: "\f14c";
+}
+.icon-share-sign:before {
+  content: "\f14d";
+}
+.icon-compass:before {
+  content: "\f14e";
+}
+.icon-collapse:before {
+  content: "\f150";
+}
+.icon-collapse-top:before {
+  content: "\f151";
+}
+.icon-expand:before {
+  content: "\f152";
+}
+.icon-euro:before,
+.icon-eur:before {
+  content: "\f153";
+}
+.icon-gbp:before {
+  content: "\f154";
+}
+.icon-dollar:before,
+.icon-usd:before {
+  content: "\f155";
+}
+.icon-rupee:before,
+.icon-inr:before {
+  content: "\f156";
+}
+.icon-yen:before,
+.icon-jpy:before {
+  content: "\f157";
+}
+.icon-renminbi:before,
+.icon-cny:before {
+  content: "\f158";
+}
+.icon-won:before,
+.icon-krw:before {
+  content: "\f159";
+}
+.icon-bitcoin:before,
+.icon-btc:before {
+  content: "\f15a";
+}
+.icon-file:before {
+  content: "\f15b";
+}
+.icon-file-text:before {
+  content: "\f15c";
+}
+.icon-sort-by-alphabet:before {
+  content: "\f15d";
+}
+.icon-sort-by-alphabet-alt:before {
+  content: "\f15e";
+}
+.icon-sort-by-attributes:before {
+  content: "\f160";
+}
+.icon-sort-by-attributes-alt:before {
+  content: "\f161";
+}
+.icon-sort-by-order:before {
+  content: "\f162";
+}
+.icon-sort-by-order-alt:before {
+  content: "\f163";
+}
+.icon-thumbs-up:before {
+  content: "\f164";
+}
+.icon-thumbs-down:before {
+  content: "\f165";
+}
+.icon-youtube-sign:before {
+  content: "\f166";
+}
+.icon-youtube:before {
+  content: "\f167";
+}
+.icon-xing:before {
+  content: "\f168";
+}
+.icon-xing-sign:before {
+  content: "\f169";
+}
+.icon-youtube-play:before {
+  content: "\f16a";
+}
+.icon-dropbox:before {
+  content: "\f16b";
+}
+.icon-stackexchange:before {
+  content: "\f16c";
+}
+.icon-instagram:before {
+  content: "\f16d";
+}
+.icon-flickr:before {
+  content: "\f16e";
+}
+.icon-adn:before {
+  content: "\f170";
+}
+.icon-bitbucket:before {
+  content: "\f171";
+}
+.icon-bitbucket-sign:before {
+  content: "\f172";
+}
+.icon-tumblr:before {
+  content: "\f173";
+}
+.icon-tumblr-sign:before {
+  content: "\f174";
+}
+.icon-long-arrow-down:before {
+  content: "\f175";
+}
+.icon-long-arrow-up:before {
+  content: "\f176";
+}
+.icon-long-arrow-left:before {
+  content: "\f177";
+}
+.icon-long-arrow-right:before {
+  content: "\f178";
+}
+.icon-apple:before {
+  content: "\f179";
+}
+.icon-windows:before {
+  content: "\f17a";
+}
+.icon-android:before {
+  content: "\f17b";
+}
+.icon-linux:before {
+  content: "\f17c";
+}
+.icon-dribbble:before {
+  content: "\f17d";
+}
+.icon-skype:before {
+  content: "\f17e";
+}
+.icon-foursquare:before {
+  content: "\f180";
+}
+.icon-trello:before {
+  content: "\f181";
+}
+.icon-female:before {
+  content: "\f182";
+}
+.icon-male:before {
+  content: "\f183";
+}
+.icon-gittip:before {
+  content: "\f184";
+}
+.icon-sun:before {
+  content: "\f185";
+}
+.icon-moon:before {
+  content: "\f186";
+}
+.icon-archive:before {
+  content: "\f187";
+}
+.icon-bug:before {
+  content: "\f188";
+}
+.icon-vk:before {
+  content: "\f189";
+}
+.icon-weibo:before {
+  content: "\f18a";
+}
+.icon-renren:before {
+  content: "\f18b";
+}

common/static/xblock/discussion/js/discussion_inline_edit.js

+function DiscussionEditBlock(runtime, element) {
+    $('.save-button').bind('click', function() {
+        var data = {
+            'display_name': $('#display-name').val(),
+            'discussion_category': $('#discussion-category').val(),
+            'discussion_target': $('#discussion-target').val()
+        };
+        var handlerUrl = runtime.handlerUrl(element, 'studio_submit');
+        $.post(handlerUrl, JSON.stringify(data)).complete(function() {
+            window.location.reload(false);
+        });
+    });
+
+    $('.cancel-button').bind('click', function() {
+        runtime.notify('cancel', {});
+    });
+}

common/static/xblock/discussion/js/vendor/Markdown.Converter.js

+var Markdown;
+
+if (typeof exports === "object" && typeof require === "function") // we're in a CommonJS (e.g. Node.js) module
+    Markdown = exports;
+else
+    Markdown = {};
+    
+// The following text is included for historical reasons, but should
+// be taken with a pinch of salt; it's not all true anymore.
+
+//
+// Wherever possible, Showdown is a straight, line-by-line port
+// of the Perl version of Markdown.
+//
+// This is not a normal parser design; it's basically just a
+// series of string substitutions.  It's hard to read and
+// maintain this way,  but keeping Showdown close to the original
+// design makes it easier to port new features.
+//
+// More importantly, Showdown behaves like markdown.pl in most
+// edge cases.  So web applications can do client-side preview
+// in Javascript, and then build identical HTML on the server.
+//
+// This port needs the new RegExp functionality of ECMA 262,
+// 3rd Edition (i.e. Javascript 1.5).  Most modern web browsers
+// should do fine.  Even with the new regular expression features,
+// We do a lot of work to emulate Perl's regex functionality.
+// The tricky changes in this file mostly have the "attacklab:"
+// label.  Major or self-explanatory changes don't.
+//
+// Smart diff tools like Araxis Merge will be able to match up
+// this file with markdown.pl in a useful way.  A little tweaking
+// helps: in a copy of markdown.pl, replace "#" with "//" and
+// replace "$text" with "text".  Be sure to ignore whitespace
+// and line endings.
+//
+
+
+//
+// Usage:
+//
+//   var text = "Markdown *rocks*.";
+//
+//   var converter = new Markdown.Converter();
+//   var html = converter.makeHtml(text);
+//
+//   alert(html);
+//
+// Note: move the sample code to the bottom of this
+// file before uncommenting it.
+//
+
+(function () {
+
+    function identity(x) { return x; }
+    function returnFalse(x) { return false; }
+
+    function HookCollection() { }
+
+    HookCollection.prototype = {
+
+        chain: function (hookname, func) {
+            var original = this[hookname];
+            if (!original)
+                throw new Error("unknown hook " + hookname);
+
+            if (original === identity)
+                this[hookname] = func;
+            else
+                this[hookname] = function (x) { return func(original(x)); }
+        },
+        set: function (hookname, func) {
+            if (!this[hookname])
+                throw new Error("unknown hook " + hookname);
+            this[hookname] = func;
+        },
+        addNoop: function (hookname) {
+            this[hookname] = identity;
+        },
+        addFalse: function (hookname) {
+            this[hookname] = returnFalse;
+        }
+    };
+
+    Markdown.HookCollection = HookCollection;
+
+    // g_urls and g_titles allow arbitrary user-entered strings as keys. This
+    // caused an exception (and hence stopped the rendering) when the user entered
+    // e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
+    // (since no builtin property starts with "s_"). See
+    // http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
+    // (granted, switching from Array() to Object() alone would have left only __proto__
+    // to be a problem)
+    function SaveHash() { }
+    SaveHash.prototype = {
+        set: function (key, value) {
+            this["s_" + key] = value;
+        },
+        get: function (key) {
+            return this["s_" + key];
+        }
+    };
+
+    Markdown.Converter = function () {
+        var pluginHooks = this.hooks = new HookCollection();
+        pluginHooks.addNoop("plainLinkText");  // given a URL that was encountered by itself (without markup), should return the link text that's to be given to this link
+        pluginHooks.addNoop("preConversion");  // called with the orignal text as given to makeHtml. The result of this plugin hook is the actual markdown source that will be cooked
+        pluginHooks.addNoop("postConversion"); // called with the final cooked HTML code. The result of this plugin hook is the actual output of makeHtml
+
+        //
+        // Private state of the converter instance:
+        //
+
+        // Global hashes, used by various utility routines
+        var g_urls;
+        var g_titles;
+        var g_html_blocks;
+
+        // Used to track when we're inside an ordered or unordered list
+        // (see _ProcessListItems() for details):
+        var g_list_level;
+
+        this.makeHtml = function (text) {
+
+            //
+            // Main function. The order in which other subs are called here is
+            // essential. Link and image substitutions need to happen before
+            // _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
+            // and <img> tags get encoded.
+            //
+
+            // This will only happen if makeHtml on the same converter instance is called from a plugin hook.
+            // Don't do that.
+            if (g_urls)
+                throw new Error("Recursive call to converter.makeHtml");
+        
+            // Create the private state objects.
+            g_urls = new SaveHash();
+            g_titles = new SaveHash();
+            g_html_blocks = [];
+            g_list_level = 0;
+
+            text = pluginHooks.preConversion(text);
+
+            // attacklab: Replace ~ with ~T
+            // This lets us use tilde as an escape char to avoid md5 hashes
+            // The choice of character is arbitray; anything that isn't
+            // magic in Markdown will work.
+            text = text.replace(/~/g, "~T");
+
+            // attacklab: Replace $ with ~D
+            // RegExp interprets $ as a special character
+            // when it's in a replacement string
+            text = text.replace(/\$/g, "~D");
+
+            // Standardize line endings
+            text = text.replace(/\r\n/g, "\n"); // DOS to Unix
+            text = text.replace(/\r/g, "\n"); // Mac to Unix
+
+            // Make sure text begins and ends with a couple of newlines:
+            text = "\n\n" + text + "\n\n";
+
+            // Convert all tabs to spaces.
+            text = _Detab(text);
+
+            // Strip any lines consisting only of spaces and tabs.
+            // This makes subsequent regexen easier to write, because we can
+            // match consecutive blank lines with /\n+/ instead of something
+            // contorted like /[ \t]*\n+/ .
+            text = text.replace(/^[ \t]+$/mg, "");
+
+            // Turn block-level HTML blocks into hash entries
+            text = _HashHTMLBlocks(text);
+
+            // Strip link definitions, store in hashes.
+            text = _StripLinkDefinitions(text);
+
+            text = _RunBlockGamut(text);
+
+            text = _UnescapeSpecialChars(text);
+
+            // attacklab: Restore dollar signs
+            text = text.replace(/~D/g, "$$");
+
+            // attacklab: Restore tildes
+            text = text.replace(/~T/g, "~");
+
+            text = pluginHooks.postConversion(text);
+
+            g_html_blocks = g_titles = g_urls = null;
+
+            return text;
+        };
+
+        function _StripLinkDefinitions(text) {
+            //
+            // Strips link definitions from text, stores the URLs and titles in
+            // hash references.
+            //
+
+            // Link defs are in the form: ^[id]: url "optional title"
+
+            /*
+            text = text.replace(/
+                ^[ ]{0,3}\[(.+)\]:  // id = $1  attacklab: g_tab_width - 1
+                [ \t]*
+                \n?                 // maybe *one* newline
+                [ \t]*
+                <?(\S+?)>?          // url = $2
+                (?=\s|$)            // lookahead for whitespace instead of the lookbehind removed below
+                [ \t]*
+                \n?                 // maybe one newline
+                [ \t]*
+                (                   // (potential) title = $3
+                    (\n*)           // any lines skipped = $4 attacklab: lookbehind removed
+                    [ \t]+
+                    ["(]
+                    (.+?)           // title = $5
+                    [")]
+                    [ \t]*
+                )?                  // title is optional
+                (?:\n+|$)
+            /gm, function(){...});
+            */
+
+            text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
+                function (wholeMatch, m1, m2, m3, m4, m5) {
+                    m1 = m1.toLowerCase();
+                    g_urls.set(m1, _EncodeAmpsAndAngles(m2));  // Link IDs are case-insensitive
+                    if (m4) {
+                        // Oops, found blank lines, so it's not a title.
+                        // Put back the parenthetical statement we stole.
+                        return m3;
+                    } else if (m5) {
+                        g_titles.set(m1, m5.replace(/"/g, "&quot;"));
+                    }
+
+                    // Completely remove the definition from the text
+                    return "";
+                }
+            );
+
+            return text;
+        }
+
+        function _HashHTMLBlocks(text) {
+
+            // Hashify HTML blocks:
+            // We only want to do this for block-level HTML tags, such as headers,
+            // lists, and tables. That's because we still want to wrap <p>s around
+            // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+            // phrase emphasis, and spans. The list of tags we're looking for is
+            // hard-coded:
+            var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
+            var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
+
+            // First, look for nested blocks, e.g.:
+            //   <div>
+            //     <div>
+            //     tags for inner block must be indented.
+            //     </div>
+            //   </div>
+            //
+            // The outermost tags must start at the left margin for this to match, and
+            // the inner nested divs must be indented.
+            // We need to do this before the next, more liberal match, because the next
+            // match will start at the first `<div>` and stop at the first `</div>`.
+
+            // attacklab: This regex can be expensive when it fails.
+
+            /*
+            text = text.replace(/
+                (                       // save in $1
+                    ^                   // start of line  (with /m)
+                    <($block_tags_a)    // start tag = $2
+                    \b                  // word break
+                                        // attacklab: hack around khtml/pcre bug...
+                    [^\r]*?\n           // any number of lines, minimally matching
+                    </\2>               // the matching end tag
+                    [ \t]*              // trailing spaces/tabs
+                    (?=\n+)             // followed by a newline
+                )                       // attacklab: there are sentinel newlines at end of document
+            /gm,function(){...}};
+            */
+            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm, hashElement);
+
+            //
+            // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
+            //
+
+            /*
+            text = text.replace(/
+                (                       // save in $1
+                    ^                   // start of line  (with /m)
+                    <($block_tags_b)    // start tag = $2
+                    \b                  // word break
+                                        // attacklab: hack around khtml/pcre bug...
+                    [^\r]*?             // any number of lines, minimally matching
+                    .*</\2>             // the matching end tag
+                    [ \t]*              // trailing spaces/tabs
+                    (?=\n+)             // followed by a newline
+                )                       // attacklab: there are sentinel newlines at end of document
+            /gm,function(){...}};
+            */
+            text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm, hashElement);
+
+            // Special case just for <hr />. It was easier to make a special case than
+            // to make the other regex more complicated.  
+
+            /*
+            text = text.replace(/
+                \n                  // Starting after a blank line
+                [ ]{0,3}
+                (                   // save in $1
+                    (<(hr)          // start tag = $2
+                        \b          // word break
+                        ([^<>])*?
+                    \/?>)           // the matching end tag
+                    [ \t]*
+                    (?=\n{2,})      // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g, hashElement);
+
+            // Special case for standalone HTML comments:
+
+            /*
+            text = text.replace(/
+                \n\n                                            // Starting after a blank line
+                [ ]{0,3}                                        // attacklab: g_tab_width - 1
+                (                                               // save in $1
+                    <!
+                    (--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)   // see http://www.w3.org/TR/html-markup/syntax.html#comments and http://meta.stackoverflow.com/q/95256
+                    >
+                    [ \t]*
+                    (?=\n{2,})                                  // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
+
+            // PHP and ASP-style processor instructions (<?...?> and <%...%>)
+
+            /*
+            text = text.replace(/
+                (?:
+                    \n\n            // Starting after a blank line
+                )
+                (                   // save in $1
+                    [ ]{0,3}        // attacklab: g_tab_width - 1
+                    (?:
+                        <([?%])     // $2
+                        [^\r]*?
+                        \2>
+                    )
+                    [ \t]*
+                    (?=\n{2,})      // followed by a blank line
+                )
+            /g,hashElement);
+            */
+            text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g, hashElement);
+
+            return text;
+        }
+
+        function hashElement(wholeMatch, m1) {
+            var blockText = m1;
+
+            // Undo double lines
+            blockText = blockText.replace(/^\n+/, "");
+
+            // strip trailing blank lines
+            blockText = blockText.replace(/\n+$/g, "");
+
+            // Replace the element text with a marker ("~KxK" where x is its key)
+            blockText = "\n\n~K" + (g_html_blocks.push(blockText) - 1) + "K\n\n";
+
+            return blockText;
+        }
+
+        function _RunBlockGamut(text, doNotUnhash) {
+            //
+            // These are all the transformations that form block-level
+            // tags like paragraphs, headers, and list items.
+            //
+            text = _DoHeaders(text);
+
+            // Do Horizontal Rules:
+            var replacement = "<hr />\n";
+            text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm, replacement);
+            text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm, replacement);
+            text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm, replacement);
+
+            text = _DoLists(text);
+            text = _DoCodeBlocks(text);
+            text = _DoBlockQuotes(text);
+
+            // We already ran _HashHTMLBlocks() before, in Markdown(), but that
+            // was to escape raw HTML in the original Markdown source. This time,
+            // we're escaping the markup we've just created, so that we don't wrap
+            // <p> tags around block-level tags.
+            text = _HashHTMLBlocks(text);
+            text = _FormParagraphs(text, doNotUnhash);
+
+            return text;
+        }
+
+        function _RunSpanGamut(text) {
+            //
+            // These are all the transformations that occur *within* block-level
+            // tags like paragraphs, headers, and list items.
+            //
+
+            text = _DoCodeSpans(text);
+            text = _EscapeSpecialCharsWithinTagAttributes(text);
+            text = _EncodeBackslashEscapes(text);
+
+            // Process anchor and image tags. Images must come first,
+            // because ![foo][f] looks like an anchor.
+            text = _DoImages(text);
+            text = _DoAnchors(text);
+
+            // Make links out of things like `<http://example.com/>`
+            // Must come after _DoAnchors(), because you can use < and >
+            // delimiters in inline links like [this](<url>).
+            text = _DoAutoLinks(text);
+            
+            text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
+            
+            text = _EncodeAmpsAndAngles(text);
+            text = _DoItalicsAndBold(text);
+
+            // Do hard breaks:
+            text = text.replace(/  +\n/g, " <br>\n");
+
+            return text;
+        }
+
+        function _EscapeSpecialCharsWithinTagAttributes(text) {
+            //
+            // Within tags -- meaning between < and > -- encode [\ ` * _] so they
+            // don't conflict with their use in Markdown for code, italics and strong.
+            //
+
+            // Build a regex to find HTML tags and comments.  See Friedl's 
+            // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
+
+            // SE: changed the comment part of the regex
+
+            var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
+
+            text = text.replace(regex, function (wholeMatch) {
+                var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`");
+                tag = escapeCharacters(tag, wholeMatch.charAt(1) == "!" ? "\\`*_/" : "\\`*_"); // also escape slashes in comments to prevent autolinking there -- http://meta.stackoverflow.com/questions/95987
+                return tag;
+            });
+
+            return text;
+        }
+
+        function _DoAnchors(text) {
+            //
+            // Turn Markdown link shortcuts into XHTML <a> tags.
+            //
+            //
+            // First, handle reference-style links: [link text] [id]
+            //
+
+            /*
+            text = text.replace(/
+                (                           // wrap whole match in $1
+                    \[
+                    (
+                        (?:
+                            \[[^\]]*\]      // allow brackets nested one level
+                            |
+                            [^\[]           // or anything else
+                        )*
+                    )
+                    \]
+
+                    [ ]?                    // one optional space
+                    (?:\n[ ]*)?             // one optional newline followed by spaces
+
+                    \[
+                    (.*?)                   // id = $3
+                    \]
+                )
+                ()()()()                    // pad remaining backreferences
+            /g, writeAnchorTag);
+            */
+            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);
+
+            //
+            // Next, inline-style links: [link text](url "optional title")
+            //
+
+            /*
+            text = text.replace(/
+                (                           // wrap whole match in $1
+                    \[
+                    (
+                        (?:
+                            \[[^\]]*\]      // allow brackets nested one level
+                            |
+                            [^\[\]]         // or anything else
+                        )*
+                    )
+                    \]
+                    \(                      // literal paren
+                    [ \t]*
+                    ()                      // no id, so leave $3 empty
+                    <?(                     // href = $4
+                        (?:
+                            \([^)]*\)       // allow one level of (correctly nested) parens (think MSDN)
+                            |
+                            [^()\s]
+                        )*?
+                    )>?                
+                    [ \t]*
+                    (                       // $5
+                        (['"])              // quote char = $6
+                        (.*?)               // Title = $7
+                        \6                  // matching quote
+                        [ \t]*              // ignore any spaces/tabs between closing quote and )
+                    )?                      // title is optional
+                    \)
+                )
+            /g, writeAnchorTag);
+            */
+
+            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?((?:\([^)]*\)|[^()\s])*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeAnchorTag);
+
+            //
+            // Last, handle reference-style shortcuts: [link text]
+            // These must come last in case you've also got [link test][1]
+            // or [link test](/foo)
+            //
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    \[
+                    ([^\[\]]+)      // link text = $2; can't contain '[' or ']'
+                    \]
+                )
+                ()()()()()          // pad rest of backreferences
+            /g, writeAnchorTag);
+            */
+            text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
+
+            return text;
+        }
+
+        function writeAnchorTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
+            if (m7 == undefined) m7 = "";
+            var whole_match = m1;
+            var link_text = m2.replace(/:\/\//g, "~P"); // to prevent auto-linking withing the link. will be converted back after the auto-linker runs
+            var link_id = m3.toLowerCase();
+            var url = m4;
+            var title = m7;
+
+            if (url == "") {
+                if (link_id == "") {
+                    // lower-case and turn embedded newlines into spaces
+                    link_id = link_text.toLowerCase().replace(/ ?\n/g, " ");
+                }
+                url = "#" + link_id;
+
+                if (g_urls.get(link_id) != undefined) {
+                    url = g_urls.get(link_id);
+                    if (g_titles.get(link_id) != undefined) {
+                        title = g_titles.get(link_id);
+                    }
+                }
+                else {
+                    if (whole_match.search(/\(\s*\)$/m) > -1) {
+                        // Special case for explicit empty url
+                        url = "";
+                    } else {
+                        return whole_match;
+                    }
+                }
+            }
+            url = encodeProblemUrlChars(url);
+            url = escapeCharacters(url, "*_");
+            var result = "<a href=\"" + url + "\"";
+
+            if (title != "") {
+                title = attributeEncode(title);
+                title = escapeCharacters(title, "*_");
+                result += " title=\"" + title + "\"";
+            }
+
+            result += ">" + link_text + "</a>";
+
+            return result;
+        }
+
+        function _DoImages(text) {
+            //
+            // Turn Markdown image shortcuts into <img> tags.
+            //
+
+            //
+            // First, handle reference-style labeled images: ![alt text][id]
+            //
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    !\[
+                    (.*?)           // alt text = $2
+                    \]
+
+                    [ ]?            // one optional space
+                    (?:\n[ ]*)?     // one optional newline followed by spaces
+
+                    \[
+                    (.*?)           // id = $3
+                    \]
+                )
+                ()()()()            // pad rest of backreferences
+            /g, writeImageTag);
+            */
+            text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeImageTag);
+
+            //
+            // Next, handle inline images:  ![alt text](url "optional title")
+            // Don't forget: encode * and _
+
+            /*
+            text = text.replace(/
+                (                   // wrap whole match in $1
+                    !\[
+                    (.*?)           // alt text = $2
+                    \]
+                    \s?             // One optional whitespace character
+                    \(              // literal paren
+                    [ \t]*
+                    ()              // no id, so leave $3 empty
+                    <?(\S+?)>?      // src url = $4
+                    [ \t]*
+                    (               // $5
+                        (['"])      // quote char = $6
+                        (.*?)       // title = $7
+                        \6          // matching quote
+                        [ \t]*
+                    )?              // title is optional
+                    \)
+                )
+            /g, writeImageTag);
+            */
+            text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g, writeImageTag);
+
+            return text;
+        }
+        
+        function attributeEncode(text) {
+            // unconditionally replace angle brackets here -- what ends up in an attribute (e.g. alt or title)
+            // never makes sense to have verbatim HTML in it (and the sanitizer would totally break it)
+            return text.replace(/>/g, "&gt;").replace(/</g, "&lt;").replace(/"/g, "&quot;");
+        }
+
+        function writeImageTag(wholeMatch, m1, m2, m3, m4, m5, m6, m7) {
+            var whole_match = m1;
+            var alt_text = m2;
+            var link_id = m3.toLowerCase();
+            var url = m4;
+            var title = m7;
+
+            if (!title) title = "";
+
+            if (url == "") {
+                if (link_id == "") {
+                    // lower-case and turn embedded newlines into spaces
+                    link_id = alt_text.toLowerCase().replace(/ ?\n/g, " ");
+                }
+                url = "#" + link_id;
+
+                if (g_urls.get(link_id) != undefined) {
+                    url = g_urls.get(link_id);
+                    if (g_titles.get(link_id) != undefined) {
+                        title = g_titles.get(link_id);
+                    }
+                }
+                else {
+                    return whole_match;
+                }
+            }
+            
+            alt_text = escapeCharacters(attributeEncode(alt_text), "*_[]()");
+            url = escapeCharacters(url, "*_");
+            var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
+
+            // attacklab: Markdown.pl adds empty title attributes to images.
+            // Replicate this bug.
+
+            //if (title != "") {
+            title = attributeEncode(title);
+            title = escapeCharacters(title, "*_");
+            result += " title=\"" + title + "\"";
+            //}
+
+            result += " />";
+
+            return result;
+        }
+
+        function _DoHeaders(text) {
+
+            // Setext-style headers:
+            //  Header 1
+            //  ========
+            //  
+            //  Header 2
+            //  --------
+            //
+            text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
+                function (wholeMatch, m1) { return "<h1>" + _RunSpanGamut(m1) + "</h1>\n\n"; }
+            );
+
+            text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
+                function (matchFound, m1) { return "<h2>" + _RunSpanGamut(m1) + "</h2>\n\n"; }
+            );
+
+            // atx-style headers:
+            //  # Header 1
+            //  ## Header 2
+            //  ## Header 2 with closing hashes ##
+            //  ...
+            //  ###### Header 6
+            //
+
+            /*
+            text = text.replace(/
+                ^(\#{1,6})      // $1 = string of #'s
+                [ \t]*
+                (.+?)           // $2 = Header text
+                [ \t]*
+                \#*             // optional closing #'s (not counted)
+                \n+
+            /gm, function() {...});
+            */
+
+            text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
+                function (wholeMatch, m1, m2) {
+                    var h_level = m1.length;
+                    return "<h" + h_level + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">\n\n";
+                }
+            );
+
+            return text;
+        }
+
+        function _DoLists(text) {
+            //
+            // Form HTML ordered (numbered) and unordered (bulleted) lists.
+            //
+
+            // attacklab: add sentinel to hack around khtml/safari bug:
+            // http://bugs.webkit.org/show_bug.cgi?id=11231
+            text += "~0";
+
+            // Re-usable pattern to match any entirel ul or ol list:
+
+            /*
+            var whole_list = /
+                (                                   // $1 = whole list
+                    (                               // $2
+                        [ ]{0,3}                    // attacklab: g_tab_width - 1
+                        ([*+-]|\d+[.])              // $3 = first list item marker
+                        [ \t]+
+                    )
+                    [^\r]+?
+                    (                               // $4
+                        ~0                          // sentinel for workaround; should be $
+                        |
+                        \n{2,}
+                        (?=\S)
+                        (?!                         // Negative lookahead for another list item marker
+                            [ \t]*
+                            (?:[*+-]|\d+[.])[ \t]+
+                        )
+                    )
+                )
+            /g
+            */
+            var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
+
+            if (g_list_level) {
+                text = text.replace(whole_list, function (wholeMatch, m1, m2) {
+                    var list = m1;
+                    var list_type = (m2.search(/[*+-]/g) > -1) ? "ul" : "ol";
+
+                    var result = _ProcessListItems(list, list_type);
+
+                    // Trim any trailing whitespace, to put the closing `</$list_type>`
+                    // up on the preceding line, to get it past the current stupid
+                    // HTML block parser. This is a hack to work around the terrible
+                    // hack that is the HTML block parser.
+                    result = result.replace(/\s+$/, "");
+                    result = "<" + list_type + ">" + result + "</" + list_type + ">\n";
+                    return result;
+                });
+            } else {
+                whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
+                text = text.replace(whole_list, function (wholeMatch, m1, m2, m3) {
+                    var runup = m1;
+                    var list = m2;
+
+                    var list_type = (m3.search(/[*+-]/g) > -1) ? "ul" : "ol";
+                    var result = _ProcessListItems(list, list_type);
+                    result = runup + "<" + list_type + ">\n" + result + "</" + list_type + ">\n";
+                    return result;
+                });
+            }
+
+            // attacklab: strip sentinel
+            text = text.replace(/~0/, "");
+
+            return text;
+        }
+
+        var _listItemMarkers = { ol: "\\d+[.]", ul: "[*+-]" };
+
+        function _ProcessListItems(list_str, list_type) {
+            //
+            //  Process the contents of a single ordered or unordered list, splitting it
+            //  into individual list items.
+            //
+            //  list_type is either "ul" or "ol".
+
+            // The $g_list_level global keeps track of when we're inside a list.
+            // Each time we enter a list, we increment it; when we leave a list,
+            // we decrement. If it's zero, we're not in a list anymore.
+            //
+            // We do this because when we're not inside a list, we want to treat
+            // something like this:
+            //
+            //    I recommend upgrading to version
+            //    8. Oops, now this line is treated
+            //    as a sub-list.
+            //
+            // As a single paragraph, despite the fact that the second line starts
+            // with a digit-period-space sequence.
+            //
+            // Whereas when we're inside a list (or sub-list), that line will be
+            // treated as the start of a sub-list. What a kludge, huh? This is
+            // an aspect of Markdown's syntax that's hard to parse perfectly
+            // without resorting to mind-reading. Perhaps the solution is to
+            // change the syntax rules such that sub-lists must start with a
+            // starting cardinal number; e.g. "1." or "a.".
+
+            g_list_level++;
+
+            // trim trailing blank lines:
+            list_str = list_str.replace(/\n{2,}$/, "\n");
+
+            // attacklab: add sentinel to emulate \z
+            list_str += "~0";
+
+            // In the original attacklab showdown, list_type was not given to this function, and anything
+            // that matched /[*+-]|\d+[.]/ would just create the next <li>, causing this mismatch:
+            //
+            //  Markdown          rendered by WMD        rendered by MarkdownSharp
+            //  ------------------------------------------------------------------
+            //  1. first          1. first               1. first
+            //  2. second         2. second              2. second
+            //  - third           3. third                   * third
+            //
+            // We changed this to behave identical to MarkdownSharp. This is the constructed RegEx,
+            // with {MARKER} being one of \d+[.] or [*+-], depending on list_type:
+        
+            /*
+            list_str = list_str.replace(/
+                (^[ \t]*)                       // leading whitespace = $1
+                ({MARKER}) [ \t]+               // list marker = $2
+                ([^\r]+?                        // list item text   = $3
+                    (\n+)
+                )
+                (?=
+                    (~0 | \2 ({MARKER}) [ \t]+)
+                )
+            /gm, function(){...});
+            */
+
+            var marker = _listItemMarkers[list_type];
+            var re = new RegExp("(^[ \\t]*)(" + marker + ")[ \\t]+([^\\r]+?(\\n+))(?=(~0|\\1(" + marker + ")[ \\t]+))", "gm");
+            var last_item_had_a_double_newline = false;
+            list_str = list_str.replace(re,
+                function (wholeMatch, m1, m2, m3) {
+                    var item = m3;
+                    var leading_space = m1;
+                    var ends_with_double_newline = /\n\n$/.test(item);
+                    var contains_double_newline = ends_with_double_newline || item.search(/\n{2,}/) > -1;
+
+                    if (contains_double_newline || last_item_had_a_double_newline) {
+                        item = _RunBlockGamut(_Outdent(item), /* doNotUnhash = */true);
+                    }
+                    else {
+                        // Recursion for sub-lists:
+                        item = _DoLists(_Outdent(item));
+                        item = item.replace(/\n$/, ""); // chomp(item)
+                        item = _RunSpanGamut(item);
+                    }
+                    last_item_had_a_double_newline = ends_with_double_newline;
+                    return "<li>" + item + "</li>\n";
+                }
+            );
+
+            // attacklab: strip sentinel
+            list_str = list_str.replace(/~0/g, "");
+
+            g_list_level--;
+            return list_str;
+        }
+
+        function _DoCodeBlocks(text) {
+            //
+            //  Process Markdown `<pre><code>` blocks.
+            //  
+
+            /*
+            text = text.replace(/
+                (?:\n\n|^)
+                (                               // $1 = the code block -- one or more lines, starting with a space/tab
+                    (?:
+                        (?:[ ]{4}|\t)           // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
+                        .*\n+
+                    )+
+                )
+                (\n*[ ]{0,3}[^ \t\n]|(?=~0))    // attacklab: g_tab_width
+            /g ,function(){...});
+            */
+
+            // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
+            text += "~0";
+
+            text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
+                function (wholeMatch, m1, m2) {
+                    var codeblock = m1;
+                    var nextChar = m2;
+
+                    codeblock = _EncodeCode(_Outdent(codeblock));
+                    codeblock = _Detab(codeblock);
+                    codeblock = codeblock.replace(/^\n+/g, ""); // trim leading newlines
+                    codeblock = codeblock.replace(/\n+$/g, ""); // trim trailing whitespace
+
+                    codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
+
+                    return "\n\n" + codeblock + "\n\n" + nextChar;
+                }
+            );
+
+            // attacklab: strip sentinel
+            text = text.replace(/~0/, "");
+
+            return text;
+        }
+
+        function hashBlock(text) {
+            text = text.replace(/(^\n+|\n+$)/g, "");
+            return "\n\n~K" + (g_html_blocks.push(text) - 1) + "K\n\n";
+        }
+
+        function _DoCodeSpans(text) {
+            //
+            // * Backtick quotes are used for <code></code> spans.
+            // 
+            // * You can use multiple backticks as the delimiters if you want to
+            //   include literal backticks in the code span. So, this input:
+            //     
+            //      Just type ``foo `bar` baz`` at the prompt.
+            //     
+            //   Will translate to:
+            //     
+            //      <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+            //     
+            //   There's no arbitrary limit to the number of backticks you
+            //   can use as delimters. If you need three consecutive backticks
+            //   in your code, use four for delimiters, etc.
+            //
+            // * You can use spaces to get literal backticks at the edges:
+            //     
+            //      ... type `` `bar` `` ...
+            //     
+            //   Turns to:
+            //     
+            //      ... type <code>`bar`</code> ...
+            //
+
+            /*
+            text = text.replace(/
+                (^|[^\\])       // Character before opening ` can't be a backslash
+                (`+)            // $2 = Opening run of `
+                (               // $3 = The code block
+                    [^\r]*?
+                    [^`]        // attacklab: work around lack of lookbehind
+                )
+                \2              // Matching closer
+                (?!`)
+            /gm, function(){...});
+            */
+
+            text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
+                function (wholeMatch, m1, m2, m3, m4) {
+                    var c = m3;
+                    c = c.replace(/^([ \t]*)/g, ""); // leading whitespace
+                    c = c.replace(/[ \t]*$/g, ""); // trailing whitespace
+                    c = _EncodeCode(c);
+                    c = c.replace(/:\/\//g, "~P"); // to prevent auto-linking. Not necessary in code *blocks*, but in code spans. Will be converted back after the auto-linker runs.
+                    return m1 + "<code>" + c + "</code>";
+                }
+            );
+
+            return text;
+        }
+
+        function _EncodeCode(text) {
+            //
+            // Encode/escape certain characters inside Markdown code runs.
+            // The point is that in code, these characters are literals,
+            // and lose their special Markdown meanings.
+            //
+            // Encode all ampersands; HTML entities are not
+            // entities within a Markdown code span.
+            text = text.replace(/&/g, "&amp;");
+
+            // Do the angle bracket song and dance:
+            text = text.replace(/</g, "&lt;");
+            text = text.replace(/>/g, "&gt;");
+
+            // Now, escape characters that are magic in Markdown:
+            text = escapeCharacters(text, "\*_{}[]\\", false);
+
+            // jj the line above breaks this:
+            //---
+
+            //* Item
+
+            //   1. Subitem
+
+            //            special char: *
+            //---
+
+            return text;
+        }
+
+        function _DoItalicsAndBold(text) {
+
+            // <strong> must go first:
+            text = text.replace(/([\W_]|^)(\*\*|__)(?=\S)([^\r]*?\S[\*_]*)\2([\W_]|$)/g,
+            "$1<strong>$3</strong>$4");
+
+            text = text.replace(/([\W_]|^)(\*|_)(?=\S)([^\r\*_]*?\S)\2([\W_]|$)/g,
+            "$1<em>$3</em>$4");
+
+            return text;
+        }
+
+        function _DoBlockQuotes(text) {
+
+            /*
+            text = text.replace(/
+                (                           // Wrap whole match in $1
+                    (
+                        ^[ \t]*>[ \t]?      // '>' at the start of a line
+                        .+\n                // rest of the first line
+                        (.+\n)*             // subsequent consecutive lines
+                        \n*                 // blanks
+                    )+
+                )
+            /gm, function(){...});
+            */
+
+            text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
+                function (wholeMatch, m1) {
+                    var bq = m1;
+
+                    // attacklab: hack around Konqueror 3.5.4 bug:
+                    // "----------bug".replace(/^-/g,"") == "bug"
+
+                    bq = bq.replace(/^[ \t]*>[ \t]?/gm, "~0"); // trim one level of quoting
+
+                    // attacklab: clean up hack
+                    bq = bq.replace(/~0/g, "");
+
+                    bq = bq.replace(/^[ \t]+$/gm, "");     // trim whitespace-only lines
+                    bq = _RunBlockGamut(bq);             // recurse
+
+                    bq = bq.replace(/(^|\n)/g, "$1  ");
+                    // These leading spaces screw with <pre> content, so we need to fix that:
+                    bq = bq.replace(
+                            /(\s*<pre>[^\r]+?<\/pre>)/gm,
+                        function (wholeMatch, m1) {
+                            var pre = m1;
+                            // attacklab: hack around Konqueror 3.5.4 bug:
+                            pre = pre.replace(/^  /mg, "~0");
+                            pre = pre.replace(/~0/g, "");
+                            return pre;
+                        });
+
+                    return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
+                }
+            );
+            return text;
+        }
+
+        function _FormParagraphs(text, doNotUnhash) {
+            //
+            //  Params:
+            //    $text - string to process with html <p> tags
+            //
+
+            // Strip leading and trailing lines:
+            text = text.replace(/^\n+/g, "");
+            text = text.replace(/\n+$/g, "");
+
+            var grafs = text.split(/\n{2,}/g);
+            var grafsOut = [];
+            
+            var markerRe = /~K(\d+)K/;
+
+            //
+            // Wrap <p> tags.
+            //
+            var end = grafs.length;
+            for (var i = 0; i < end; i++) {
+                var str = grafs[i];
+
+                // if this is an HTML marker, copy it
+                if (markerRe.test(str)) {
+                    grafsOut.push(str);
+                }
+                else if (/\S/.test(str)) {
+                    str = _RunSpanGamut(str);
+                    str = str.replace(/^([ \t]*)/g, "<p>");
+                    str += "</p>"
+                    grafsOut.push(str);
+                }
+
+            }
+            //
+            // Unhashify HTML blocks
+            //
+            if (!doNotUnhash) {
+                end = grafsOut.length;
+                for (var i = 0; i < end; i++) {
+                    var foundAny = true;
+                    while (foundAny) { // we may need several runs, since the data may be nested
+                        foundAny = false;
+                        grafsOut[i] = grafsOut[i].replace(/~K(\d+)K/g, function (wholeMatch, id) {
+                            foundAny = true;
+                            return g_html_blocks[id];
+                        });
+                    }
+                }
+            }
+            return grafsOut.join("\n\n");
+        }
+
+        function _EncodeAmpsAndAngles(text) {
+            // Smart processing for ampersands and angle brackets that need to be encoded.
+
+            // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
+            //   http://bumppo.net/projects/amputator/
+            text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g, "&amp;");
+
+            // Encode naked <'s
+            text = text.replace(/<(?![a-z\/?\$!])/gi, "&lt;");
+
+            return text;
+        }
+
+        function _EncodeBackslashEscapes(text) {
+            //
+            //   Parameter:  String.
+            //   Returns:    The string, with after processing the following backslash
+            //               escape sequences.
+            //
+
+            // attacklab: The polite way to do this is with the new
+            // escapeCharacters() function:
+            //
+            //     text = escapeCharacters(text,"\\",true);
+            //     text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
+            //
+            // ...but we're sidestepping its use of the (slow) RegExp constructor
+            // as an optimization for Firefox.  This function gets called a LOT.
+
+            text = text.replace(/\\(\\)/g, escapeCharacters_callback);
+            text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g, escapeCharacters_callback);
+            return text;
+        }
+
+        function _DoAutoLinks(text) {
+
+            // note that at this point, all other URL in the text are already hyperlinked as <a href=""></a>
+            // *except* for the <http://www.foo.com> case
+
+            // automatically add < and > around unadorned raw hyperlinks
+            // must be preceded by space/BOF and followed by non-word/EOF character    
+            text = text.replace(/(^|\s)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]])($|\W)/gi, "$1<$2$3>$4");
+
+            //  autolink anything like <http://example.com>
+            
+            var replacer = function (wholematch, m1) { return "<a href=\"" + m1 + "\">" + pluginHooks.plainLinkText(m1) + "</a>"; }
+            text = text.replace(/<((https?|ftp):[^'">\s]+)>/gi, replacer);
+
+            // Email addresses: <address@domain.foo>
+            /*
+            text = text.replace(/
+                <
+                (?:mailto:)?
+                (
+                    [-.\w]+
+                    \@
+                    [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
+                )
+                >
+            /gi, _DoAutoLinks_callback());
+            */
+
+            /* disabling email autolinking, since we don't do that on the server, either
+            text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
+                function(wholeMatch,m1) {
+                    return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
+                }
+            );
+            */
+            return text;
+        }
+
+        function _UnescapeSpecialChars(text) {
+            //
+            // Swap back in all the special characters we've hidden.
+            //
+            text = text.replace(/~E(\d+)E/g,
+                function (wholeMatch, m1) {
+                    var charCodeToReplace = parseInt(m1);
+                    return String.fromCharCode(charCodeToReplace);
+                }
+            );
+            return text;
+        }
+
+        function _Outdent(text) {
+            //
+            // Remove one level of line-leading tabs or spaces
+            //
+
+            // attacklab: hack around Konqueror 3.5.4 bug:
+            // "----------bug".replace(/^-/g,"") == "bug"
+
+            text = text.replace(/^(\t|[ ]{1,4})/gm, "~0"); // attacklab: g_tab_width
+
+            // attacklab: clean up hack
+            text = text.replace(/~0/g, "")
+
+            return text;
+        }
+
+        function _Detab(text) {
+            if (!/\t/.test(text))
+                return text;
+
+            var spaces = ["    ", "   ", "  ", " "],
+            skew = 0,
+            v;
+
+            return text.replace(/[\n\t]/g, function (match, offset) {
+                if (match === "\n") {
+                    skew = offset + 1;
+                    return match;
+                }
+                v = (offset - skew) % 4;
+                skew = offset + 1;
+                return spaces[v];
+            });
+        }
+
+        //
+        //  attacklab: Utility functions
+        //
+
+        var _problemUrlChars = /(?:["'*()[\]:]|~D)/g;
+
+        // hex-encodes some unusual "problem" chars in URLs to avoid URL detection problems 
+        function encodeProblemUrlChars(url) {
+            if (!url)
+                return "";
+
+            var len = url.length;
+
+            return url.replace(_problemUrlChars, function (match, offset) {
+                if (match == "~D") // escape for dollar
+                    return "%24";
+                if (match == ":") {
+                    if (offset == len - 1 || /[0-9\/]/.test(url.charAt(offset + 1)))
+                        return ":"
+                }
+                return "%" + match.charCodeAt(0).toString(16);
+            });
+        }
+
+
+        function escapeCharacters(text, charsToEscape, afterBackslash) {
+            // First we have to escape the escape characters so that
+            // we can build a character class out of them
+            var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g, "\\$1") + "])";
+
+            if (afterBackslash) {
+                regexString = "\\\\" + regexString;
+            }
+
+            var regex = new RegExp(regexString, "g");
+            text = text.replace(regex, escapeCharacters_callback);
+
+            return text;
+        }
+
+
+        function escapeCharacters_callback(wholeMatch, m1) {
+            var charCodeToEscape = m1.charCodeAt(0);
+            return "~E" + charCodeToEscape + "E";
+        }
+
+    }; // end of the Markdown.Converter constructor
+
+})();

common/static/xblock/discussion/js/vendor/Markdown.Editor.js

+// needs Markdown.Converter.js at the moment
+
+(function () {
+
+    var util = {},
+        position = {},
+        ui = {},
+        doc = window.document,
+        re = window.RegExp,
+        nav = window.navigator,
+        SETTINGS = { lineLength: 72 },
+
+    // Used to work around some browser bugs where we can't use feature testing.
+        uaSniffed = {
+            isIE: /msie/.test(nav.userAgent.toLowerCase()),
+            isIE_5or6: /msie 6/.test(nav.userAgent.toLowerCase()) || /msie 5/.test(nav.userAgent.toLowerCase()),
+            isOpera: /opera/.test(nav.userAgent.toLowerCase())
+        };
+
+
+    // -------------------------------------------------------------------
+    //  YOUR CHANGES GO HERE
+    //
+    // I've tried to localize the things you are likely to change to 
+    // this area.
+    // -------------------------------------------------------------------
+
+    // The text that appears on the upper part of the dialog box when
+    // entering links.
+    var linkDialogText = "<p><b>" + gettext("Insert Hyperlink") + "</b></p><p>http://example.com/ " +
+	// Translators: Please keep the quotation marks (") around this text
+	gettext("\"optional title\"") + "</p>";
+    var imageDialogText = "<p><b>" + gettext("Insert Image (upload file or type url)") + "</b></p><p>http://example.com/images/diagram.jpg " +
+	// Translators: Please keep the quotation marks (") around this text
+	gettext("\"optional title\"") + "<br><br></p>";
+
+    // The default text that appears in the dialog input box when entering
+    // links.
+    var imageDefaultText = "http://";
+    var linkDefaultText = "http://";
+
+    var defaultHelpHoverTitle = gettext("Markdown Editing Help");
+
+    // -------------------------------------------------------------------
+    //  END OF YOUR CHANGES
+    // -------------------------------------------------------------------
+
+    // help, if given, should have a property "handler", the click handler for the help button,
+    // and can have an optional property "title" for the button's tooltip (defaults to "Markdown Editing Help").
+    // If help isn't given, not help button is created.
+    //
+    // The constructed editor object has the methods:
+    // - getConverter() returns the markdown converter object that was passed to the constructor
+    // - run() actually starts the editor; should be called after all necessary plugins are registered. Calling this more than once is a no-op.
+    // - refreshPreview() forces the preview to be updated. This method is only available after run() was called.
+    Markdown.Editor = function (markdownConverter, idPostfix, help, imageUploadHandler) {
+
+        idPostfix = idPostfix || "";
+
+        var hooks = this.hooks = new Markdown.HookCollection();
+        hooks.addNoop("onPreviewPush");       // called with no arguments after the preview has been refreshed
+        hooks.addNoop("postBlockquoteCreation"); // called with the user's selection *after* the blockquote was created; should return the actual to-be-inserted text
+        hooks.addFalse("insertImageDialog");     /* called with one parameter: a callback to be called with the URL of the image. If the application creates
+                                                  * its own image insertion dialog, this hook should return true, and the callback should be called with the chosen
+                                                  * image url (or null if the user cancelled). If this hook returns false, the default dialog will be used.
+                                                  */
+
+        this.getConverter = function () { return markdownConverter; }
+
+        var that = this,
+            panels;
+
+        this.run = function () {
+            if (panels)
+                return; // already initialized
+
+            panels = new PanelCollection(idPostfix);
+            var commandManager = new CommandManager(hooks);
+            var previewManager = new PreviewManager(markdownConverter, panels, function (text, previewSet) { hooks.onPreviewPush(text, previewSet); });
+            var undoManager, uiManager;
+
+            if (!/\?noundo/.test(doc.location.href)) {
+                undoManager = new UndoManager(function () {
+                    previewManager.refresh();
+                    if (uiManager) // not available on the first call
+                        uiManager.setUndoRedoButtonStates();
+                }, panels);
+                this.textOperation = function (f) {
+                    undoManager.setCommandMode();
+                    f();
+                    that.refreshPreview();
+                }
+            }
+
+            uiManager = new UIManager(idPostfix, panels, undoManager, previewManager, commandManager, help, imageUploadHandler);
+            uiManager.setUndoRedoButtonStates();
+
+            var forceRefresh = that.refreshPreview = function () { previewManager.refresh(true); };
+
+            forceRefresh();
+        };
+
+    }
+
+    // before: contains all the text in the input box BEFORE the selection.
+    // after: contains all the text in the input box AFTER the selection.
+    function Chunks() { }
+
+    // startRegex: a regular expression to find the start tag
+    // endRegex: a regular expresssion to find the end tag
+    Chunks.prototype.findTags = function (startRegex, endRegex) {
+
+        var chunkObj = this;
+        var regex;
+
+        if (startRegex) {
+
+            regex = util.extendRegExp(startRegex, "", "$");
+
+            this.before = this.before.replace(regex,
+                function (match) {
+                    chunkObj.startTag = chunkObj.startTag + match;
+                    return "";
+                });
+
+            regex = util.extendRegExp(startRegex, "^", "");
+
+            this.selection = this.selection.replace(regex,
+                function (match) {
+                    chunkObj.startTag = chunkObj.startTag + match;
+                    return "";
+                });
+        }
+
+        if (endRegex) {
+
+            regex = util.extendRegExp(endRegex, "", "$");
+
+            this.selection = this.selection.replace(regex,
+                function (match) {
+                    chunkObj.endTag = match + chunkObj.endTag;
+                    return "";
+                });
+
+            regex = util.extendRegExp(endRegex, "^", "");
+
+            this.after = this.after.replace(regex,
+                function (match) {
+                    chunkObj.endTag = match + chunkObj.endTag;
+                    return "";
+                });
+        }
+    };
+
+    // If remove is false, the whitespace is transferred
+    // to the before/after regions.
+    //
+    // If remove is true, the whitespace disappears.
+    Chunks.prototype.trimWhitespace = function (remove) {
+        var beforeReplacer, afterReplacer, that = this;
+        if (remove) {
+            beforeReplacer = afterReplacer = "";
+        } else {
+            beforeReplacer = function (s) { that.before += s; return ""; }
+            afterReplacer = function (s) { that.after = s + that.after; return ""; }
+        }
+        
+        this.selection = this.selection.replace(/^(\s*)/, beforeReplacer).replace(/(\s*)$/, afterReplacer);
+    };
+
+
+    Chunks.prototype.skipLines = function (nLinesBefore, nLinesAfter, findExtraNewlines) {
+
+        if (nLinesBefore === undefined) {
+            nLinesBefore = 1;
+        }
+
+        if (nLinesAfter === undefined) {
+            nLinesAfter = 1;
+        }
+
+        nLinesBefore++;
+        nLinesAfter++;
+
+        var regexText;
+        var replacementText;
+
+        // chrome bug ... documented at: http://meta.stackoverflow.com/questions/63307/blockquote-glitch-in-editor-in-chrome-6-and-7/65985#65985
+        if (navigator.userAgent.match(/Chrome/)) {
+            "X".match(/()./);
+        }
+
+        this.selection = this.selection.replace(/(^\n*)/, "");
+
+        this.startTag = this.startTag + re.$1;
+
+        this.selection = this.selection.replace(/(\n*$)/, "");
+        this.endTag = this.endTag + re.$1;
+        this.startTag = this.startTag.replace(/(^\n*)/, "");
+        this.before = this.before + re.$1;
+        this.endTag = this.endTag.replace(/(\n*$)/, "");
+        this.after = this.after + re.$1;
+
+        if (this.before) {
+
+            regexText = replacementText = "";
+
+            while (nLinesBefore--) {
+                regexText += "\\n?";
+                replacementText += "\n";
+            }
+
+            if (findExtraNewlines) {
+                regexText = "\\n*";
+            }
+            this.before = this.before.replace(new re(regexText + "$", ""), replacementText);
+        }
+
+        if (this.after) {
+
+            regexText = replacementText = "";
+
+            while (nLinesAfter--) {
+                regexText += "\\n?";
+                replacementText += "\n";
+            }
+            if (findExtraNewlines) {
+                regexText = "\\n*";
+            }
+
+            this.after = this.after.replace(new re(regexText, ""), replacementText);
+        }
+    };
+
+    // end of Chunks 
+
+    // A collection of the important regions on the page.
+    // Cached so we don't have to keep traversing the DOM.
+    // Also holds ieCachedRange and ieCachedScrollTop, where necessary; working around
+    // this issue:
+    // Internet explorer has problems with CSS sprite buttons that use HTML
+    // lists.  When you click on the background image "button", IE will 
+    // select the non-existent link text and discard the selection in the
+    // textarea.  The solution to this is to cache the textarea selection
+    // on the button's mousedown event and set a flag.  In the part of the
+    // code where we need to grab the selection, we check for the flag
+    // and, if it's set, use the cached area instead of querying the
+    // textarea.
+    //
+    // This ONLY affects Internet Explorer (tested on versions 6, 7
+    // and 8) and ONLY on button clicks.  Keyboard shortcuts work
+    // normally since the focus never leaves the textarea.
+    function PanelCollection(postfix) {
+        this.buttonBar = doc.getElementById("wmd-button-bar" + postfix);
+        this.preview = doc.getElementById("wmd-preview" + postfix);
+        this.input = doc.getElementById("wmd-input" + postfix);
+    };
+
+    // Returns true if the DOM element is visible, false if it's hidden.
+    // Checks if display is anything other than none.
+    util.isVisible = function (elem) {
+
+        if (window.getComputedStyle) {
+            // Most browsers
+            return window.getComputedStyle(elem, null).getPropertyValue("display") !== "none";
+        }
+        else if (elem.currentStyle) {
+            // IE
+            return elem.currentStyle["display"] !== "none";
+        }
+    };
+
+
+    // Adds a listener callback to a DOM element which is fired on a specified
+    // event.
+    util.addEvent = function (elem, event, listener) {
+        if (elem.attachEvent) {
+            // IE only.  The "on" is mandatory.
+            elem.attachEvent("on" + event, listener);
+        }
+        else {
+            // Other browsers.
+            elem.addEventListener(event, listener, false);
+        }
+    };
+
+
+    // Removes a listener callback from a DOM element which is fired on a specified
+    // event.
+    util.removeEvent = function (elem, event, listener) {
+        if (elem.detachEvent) {
+            // IE only.  The "on" is mandatory.
+            elem.detachEvent("on" + event, listener);
+        }
+        else {
+            // Other browsers.
+            elem.removeEventListener(event, listener, false);
+        }
+    };
+
+    // Converts \r\n and \r to \n.
+    util.fixEolChars = function (text) {
+        text = text.replace(/\r\n/g, "\n");
+        text = text.replace(/\r/g, "\n");
+        return text;
+    };
+
+    // Extends a regular expression.  Returns a new RegExp
+    // using pre + regex + post as the expression.
+    // Used in a few functions where we have a base
+    // expression and we want to pre- or append some
+    // conditions to it (e.g. adding "$" to the end).
+    // The flags are unchanged.
+    //
+    // regex is a RegExp, pre and post are strings.
+    util.extendRegExp = function (regex, pre, post) {
+
+        if (pre === null || pre === undefined) {
+            pre = "";
+        }
+        if (post === null || post === undefined) {
+            post = "";
+        }
+
+        var pattern = regex.toString();
+        var flags;
+
+        // Replace the flags with empty space and store them.
+        pattern = pattern.replace(/\/([gim]*)$/, function (wholeMatch, flagsPart) {
+            flags = flagsPart;
+            return "";
+        });
+
+        // Remove the slash delimiters on the regular expression.
+        pattern = pattern.replace(/(^\/|\/$)/g, "");
+        pattern = pre + pattern + post;
+
+        return new re(pattern, flags);
+    }
+
+    // UNFINISHED
+    // The assignment in the while loop makes jslint cranky.
+    // I'll change it to a better loop later.
+    position.getTop = function (elem, isInner) {
+        var result = elem.offsetTop;
+        if (!isInner) {
+            while (elem = elem.offsetParent) {
+                result += elem.offsetTop;
+            }
+        }
+        return result;
+    };
+
+    position.getHeight = function (elem) {
+        return elem.offsetHeight || elem.scrollHeight;
+    };
+
+    position.getWidth = function (elem) {
+        return elem.offsetWidth || elem.scrollWidth;
+    };
+
+    position.getPageSize = function () {
+
+        var scrollWidth, scrollHeight;
+        var innerWidth, innerHeight;
+
+        // It's not very clear which blocks work with which browsers.
+        if (self.innerHeight && self.scrollMaxY) {
+            scrollWidth = doc.body.scrollWidth;
+            scrollHeight = self.innerHeight + self.scrollMaxY;
+        }
+        else if (doc.body.scrollHeight > doc.body.offsetHeight) {
+            scrollWidth = doc.body.scrollWidth;
+            scrollHeight = doc.body.scrollHeight;
+        }
+        else {
+            scrollWidth = doc.body.offsetWidth;
+            scrollHeight = doc.body.offsetHeight;
+        }
+
+        if (self.innerHeight) {
+            // Non-IE browser
+            innerWidth = self.innerWidth;
+            innerHeight = self.innerHeight;
+        }
+        else if (doc.documentElement && doc.documentElement.clientHeight) {
+            // Some versions of IE (IE 6 w/ a DOCTYPE declaration)
+            innerWidth = doc.documentElement.clientWidth;
+            innerHeight = doc.documentElement.clientHeight;
+        }
+        else if (doc.body) {
+            // Other versions of IE
+            innerWidth = doc.body.clientWidth;
+            innerHeight = doc.body.clientHeight;
+        }
+
+        var maxWidth = Math.max(scrollWidth, innerWidth);
+        var maxHeight = Math.max(scrollHeight, innerHeight);
+        return [maxWidth, maxHeight, innerWidth, innerHeight];
+    };
+
+    // Handles pushing and popping TextareaStates for undo/redo commands.
+    // I should rename the stack variables to list.
+    function UndoManager(callback, panels) {
+
+        var undoObj = this;
+        var undoStack = []; // A stack of undo states
+        var stackPtr = 0; // The index of the current state
+        var mode = "none";
+        var lastState; // The last state
+        var timer; // The setTimeout handle for cancelling the timer
+        var inputStateObj;
+
+        // Set the mode for later logic steps.
+        var setMode = function (newMode, noSave) {
+            if (mode != newMode) {
+                mode = newMode;
+                if (!noSave) {
+                    saveState();
+                }
+            }
+
+            if (!uaSniffed.isIE || mode != "moving") {
+                timer = setTimeout(refreshState, 1);
+            }
+            else {
+                inputStateObj = null;
+            }
+        };
+
+        var refreshState = function (isInitialState) {
+            inputStateObj = new TextareaState(panels, isInitialState);
+            timer = undefined;
+        };
+
+        this.setCommandMode = function () {
+            mode = "command";
+            saveState();
+            timer = setTimeout(refreshState, 0);
+        };
+
+        this.canUndo = function () {
+            return stackPtr > 1;
+        };
+
+        this.canRedo = function () {
+            if (undoStack[stackPtr + 1]) {
+                return true;
+            }
+            return false;
+        };
+
+        // Removes the last state and restores it.
+        this.undo = function () {
+
+            if (undoObj.canUndo()) {
+                if (lastState) {
+                    // What about setting state -1 to null or checking for undefined?
+                    lastState.restore();
+                    lastState = null;
+                }
+                else {
+                    undoStack[stackPtr] = new TextareaState(panels);
+                    undoStack[--stackPtr].restore();
+
+                    if (callback) {
+                        callback();
+                    }
+                }
+            }
+
+            mode = "none";
+            panels.input.focus();
+            refreshState();
+        };
+
+        // Redo an action.
+        this.redo = function () {
+
+            if (undoObj.canRedo()) {
+
+                undoStack[++stackPtr].restore();
+
+                if (callback) {
+                    callback();
+                }
+            }
+
+            mode = "none";
+            panels.input.focus();
+            refreshState();
+        };
+
+        // Push the input area state to the stack.
+        var saveState = function () {
+            var currState = inputStateObj || new TextareaState(panels);
+
+            if (!currState) {
+                return false;
+            }
+            if (mode == "moving") {
+                if (!lastState) {
+                    lastState = currState;
+                }
+                return;
+            }
+            if (lastState) {
+                if (undoStack[stackPtr - 1].text != lastState.text) {
+                    undoStack[stackPtr++] = lastState;
+                }
+                lastState = null;
+            }
+            undoStack[stackPtr++] = currState;
+            undoStack[stackPtr + 1] = null;
+            if (callback) {
+                callback();
+            }
+        };
+
+        var handleCtrlYZ = function (event) {
+
+            var handled = false;
+
+            if (event.ctrlKey || event.metaKey) {
+
+                // IE and Opera do not support charCode.
+                var keyCode = event.charCode || event.keyCode;
+                var keyCodeChar = String.fromCharCode(keyCode);
+
+                switch (keyCodeChar) {
+
+                    case "y":
+                        undoObj.redo();
+                        handled = true;
+                        break;
+
+                    case "z":
+                        if (!event.shiftKey) {
+                            undoObj.undo();
+                        }
+                        else {
+                            undoObj.redo();
+                        }
+                        handled = true;
+                        break;
+                }
+            }
+
+            if (handled) {
+                if (event.preventDefault) {
+                    event.preventDefault();
+                }
+                if (window.event) {
+                    window.event.returnValue = false;
+                }
+                return;
+            }
+        };
+
+        // Set the mode depending on what is going on in the input area.
+        var handleModeChange = function (event) {
+
+            if (!event.ctrlKey && !event.metaKey) {
+
+                var keyCode = event.keyCode;
+
+                if ((keyCode >= 33 && keyCode <= 40) || (keyCode >= 63232 && keyCode <= 63235)) {
+                    // 33 - 40: page up/dn and arrow keys
+                    // 63232 - 63235: page up/dn and arrow keys on safari
+                    setMode("moving");
+                }
+                else if (keyCode == 8 || keyCode == 46 || keyCode == 127) {
+                    // 8: backspace
+                    // 46: delete
+                    // 127: delete
+                    setMode("deleting");
+                }
+                else if (keyCode == 13) {
+                    // 13: Enter
+                    setMode("newlines");
+                }
+                else if (keyCode == 27) {
+                    // 27: escape
+                    setMode("escape");
+                }
+                else if ((keyCode < 16 || keyCode > 20) && keyCode != 91) {
+                    // 16-20 are shift, etc. 
+                    // 91: left window key
+                    // I think this might be a little messed up since there are
+                    // a lot of nonprinting keys above 20.
+                    setMode("typing");
+                }
+            }
+        };
+
+        var setEventHandlers = function () {
+            util.addEvent(panels.input, "keypress", function (event) {
+                // keyCode 89: y
+                // keyCode 90: z
+                if ((event.ctrlKey || event.metaKey) && (event.keyCode == 89 || event.keyCode == 90)) {
+                    event.preventDefault();
+                }
+            });
+
+            var handlePaste = function () {
+                if (uaSniffed.isIE || (inputStateObj && inputStateObj.text != panels.input.value)) {
+                    if (timer == undefined) {
+                        mode = "paste";
+                        saveState();
+                        refreshState();
+                    }
+                }
+            };
+
+            util.addEvent(panels.input, "keydown", handleCtrlYZ);
+            util.addEvent(panels.input, "keydown", handleModeChange);
+            util.addEvent(panels.input, "mousedown", function () {
+                setMode("moving");
+            });
+
+            panels.input.onpaste = handlePaste;
+            panels.input.ondrop = handlePaste;
+        };
+
+        var init = function () {
+            setEventHandlers();
+            refreshState(true);
+            saveState();
+        };
+
+        init();
+    }
+
+    // end of UndoManager
+
+    // The input textarea state/contents.
+    // This is used to implement undo/redo by the undo manager.
+    function TextareaState(panels, isInitialState) {
+
+        // Aliases
+        var stateObj = this;
+        var inputArea = panels.input;
+        this.init = function () {
+            if (!util.isVisible(inputArea)) {
+                return;
+            }
+            if (!isInitialState && doc.activeElement && doc.activeElement !== inputArea) { // this happens when tabbing out of the input box
+                return;
+            }
+
+            this.setInputAreaSelectionStartEnd();
+            this.scrollTop = inputArea.scrollTop;
+            if (!this.text && inputArea.selectionStart || inputArea.selectionStart === 0) {
+                this.text = inputArea.value;
+            }
+
+        }
+
+        // Sets the selected text in the input box after we've performed an
+        // operation.
+        this.setInputAreaSelection = function () {
+
+            if (!util.isVisible(inputArea)) {
+                return;
+            }
+
+            if (inputArea.selectionStart !== undefined && !uaSniffed.isOpera) {
+
+                inputArea.focus();
+                inputArea.selectionStart = stateObj.start;
+                inputArea.selectionEnd = stateObj.end;
+                inputArea.scrollTop = stateObj.scrollTop;
+            }
+            else if (doc.selection) {
+
+                if (doc.activeElement && doc.activeElement !== inputArea) {
+                    return;
+                }
+
+                inputArea.focus();
+                var range = inputArea.createTextRange();
+                range.moveStart("character", -inputArea.value.length);
+                range.moveEnd("character", -inputArea.value.length);
+                range.moveEnd("character", stateObj.end);
+                range.moveStart("character", stateObj.start);
+                range.select();
+            }
+        };
+
+        this.setInputAreaSelectionStartEnd = function () {
+
+            if (!panels.ieCachedRange && (inputArea.selectionStart || inputArea.selectionStart === 0)) {
+
+                stateObj.start = inputArea.selectionStart;
+                stateObj.end = inputArea.selectionEnd;
+            }
+            else if (doc.selection) {
+
+                stateObj.text = util.fixEolChars(inputArea.value);
+
+                // IE loses the selection in the textarea when buttons are
+                // clicked.  On IE we cache the selection. Here, if something is cached,
+                // we take it.
+                var range = panels.ieCachedRange || doc.selection.createRange();
+
+                var fixedRange = util.fixEolChars(range.text);
+                var marker = "\x07";
+                var markedRange = marker + fixedRange + marker;
+                range.text = markedRange;
+                var inputText = util.fixEolChars(inputArea.value);
+
+                range.moveStart("character", -markedRange.length);
+                range.text = fixedRange;
+
+                stateObj.start = inputText.indexOf(marker);
+                stateObj.end = inputText.lastIndexOf(marker) - marker.length;
+
+                var len = stateObj.text.length - util.fixEolChars(inputArea.value).length;
+
+                if (len) {
+                    range.moveStart("character", -fixedRange.length);
+                    while (len--) {
+                        fixedRange += "\n";
+                        stateObj.end += 1;
+                    }
+                    range.text = fixedRange;
+                }
+
+                if (panels.ieCachedRange)
+                    stateObj.scrollTop = panels.ieCachedScrollTop; // this is set alongside with ieCachedRange
+                
+                panels.ieCachedRange = null;
+
+                this.setInputAreaSelection();
+            }
+        };
+
+        // Restore this state into the input area.
+        this.restore = function () {
+
+            if (stateObj.text != undefined && stateObj.text != inputArea.value) {
+                inputArea.value = stateObj.text;
+            }
+            this.setInputAreaSelection();
+            inputArea.scrollTop = stateObj.scrollTop;
+        };
+
+        // Gets a collection of HTML chunks from the inptut textarea.
+        this.getChunks = function () {
+
+            var chunk = new Chunks();
+            chunk.before = util.fixEolChars(stateObj.text.substring(0, stateObj.start));
+            chunk.startTag = "";
+            chunk.selection = util.fixEolChars(stateObj.text.substring(stateObj.start, stateObj.end));
+            chunk.endTag = "";
+            chunk.after = util.fixEolChars(stateObj.text.substring(stateObj.end));
+            chunk.scrollTop = stateObj.scrollTop;
+
+            return chunk;
+        };
+
+        // Sets the TextareaState properties given a chunk of markdown.
+        this.setChunks = function (chunk) {
+
+            chunk.before = chunk.before + chunk.startTag;
+            chunk.after = chunk.endTag + chunk.after;
+
+            this.start = chunk.before.length;
+            this.end = chunk.before.length + chunk.selection.length;
+            this.text = chunk.before + chunk.selection + chunk.after;
+            this.scrollTop = chunk.scrollTop;
+        };
+        this.init();
+    };
+
+    function PreviewManager(converter, panels, previewPushCallback) {
+
+        var managerObj = this;
+        var timeout;
+        var elapsedTime;
+        var oldInputText;
+        var maxDelay = 3000;
+        var startType = "delayed"; // The other legal value is "manual"
+
+        // Adds event listeners to elements
+        var setupEvents = function (inputElem, listener) {
+
+            util.addEvent(inputElem, "input", listener);
+            inputElem.onpaste = listener;
+            inputElem.ondrop = listener;
+
+            util.addEvent(inputElem, "keypress", listener);
+            util.addEvent(inputElem, "keydown", listener);
+        };
+
+        var getDocScrollTop = function () {
+
+            var result = 0;
+
+            if (window.innerHeight) {
+                result = window.pageYOffset;
+            }
+            else
+                if (doc.documentElement && doc.documentElement.scrollTop) {
+                    result = doc.documentElement.scrollTop;
+                }
+                else
+                    if (doc.body) {
+                        result = doc.body.scrollTop;
+                    }
+
+            return result;
+        };
+
+        var makePreviewHtml = function () {
+
+            // If there is no registered preview panel
+            // there is nothing to do.
+            if (!panels.preview)
+                return;
+
+
+            var text = panels.input.value;
+            if (text && text == oldInputText) {
+                return; // Input text hasn't changed.
+            }
+            else {
+                oldInputText = text;
+            }
+
+            var prevTime = new Date().getTime();
+
+            text = converter.makeHtml(text);
+
+            // Calculate the processing time of the HTML creation.
+            // It's used as the delay time in the event listener.
+            var currTime = new Date().getTime();
+            elapsedTime = currTime - prevTime;
+
+            pushPreviewHtml(text);
+        };
+
+        // setTimeout is already used.  Used as an event listener.
+        var applyTimeout = function () {
+
+            if (timeout) {
+                clearTimeout(timeout);
+                timeout = undefined;
+            }
+
+            if (startType !== "manual") {
+
+                var delay = 0;
+
+                if (startType === "delayed") {
+                    delay = elapsedTime;
+                }
+
+                if (delay > maxDelay) {
+                    delay = maxDelay;
+                }
+                timeout = setTimeout(makePreviewHtml, delay);
+            }
+        };
+
+        var getScaleFactor = function (panel) {
+            if (panel.scrollHeight <= panel.clientHeight) {
+                return 1;
+            }
+            return panel.scrollTop / (panel.scrollHeight - panel.clientHeight);
+        };
+
+        var setPanelScrollTops = function () {
+            if (panels.preview) {
+                panels.preview.scrollTop = (panels.preview.scrollHeight - panels.preview.clientHeight) * getScaleFactor(panels.preview);
+            }
+        };
+
+        this.refresh = function (requiresRefresh) {
+
+            if (requiresRefresh) {
+                oldInputText = "";
+                makePreviewHtml();
+            }
+            else {
+                applyTimeout();
+            }
+        };
+
+        this.processingTime = function () {
+            return elapsedTime;
+        };
+
+        var isFirstTimeFilled = true;
+
+        // IE doesn't let you use innerHTML if the element is contained somewhere in a table
+        // (which is the case for inline editing) -- in that case, detach the element, set the
+        // value, and reattach. Yes, that *is* ridiculous.
+        var ieSafePreviewSet = function (text) {
+            var preview = panels.preview;
+            var parent = preview.parentNode;
+            var sibling = preview.nextSibling;
+            parent.removeChild(preview);
+            preview.innerHTML = text;
+            if (!sibling)
+                parent.appendChild(preview);
+            else
+                parent.insertBefore(preview, sibling);
+        }
+
+        var nonSuckyBrowserPreviewSet = function (text) {
+            panels.preview.innerHTML = text;
+        }
+
+        var previewSetter;
+
+        var previewSet = function (text) {
+            if (previewSetter)
+                return previewSetter(text);
+
+            try {
+                nonSuckyBrowserPreviewSet(text);
+                previewSetter = nonSuckyBrowserPreviewSet;
+            } catch (e) {
+                previewSetter = ieSafePreviewSet;
+                previewSetter(text);
+            }
+        };
+
+        var pushPreviewHtml = function (text) {
+
+            var emptyTop = position.getTop(panels.input) - getDocScrollTop();
+
+            if (panels.preview) {
+                previewPushCallback(text, previewSet);
+            }
+
+            setPanelScrollTops();
+
+            if (isFirstTimeFilled) {
+                isFirstTimeFilled = false;
+                return;
+            }
+
+            var fullTop = position.getTop(panels.input) - getDocScrollTop();
+
+            if (uaSniffed.isIE) {
+                setTimeout(function () {
+                    window.scrollBy(0, fullTop - emptyTop);
+                }, 0);
+            }
+            else {
+                window.scrollBy(0, fullTop - emptyTop);
+            }
+        };
+
+        var init = function () {
+
+            setupEvents(panels.input, applyTimeout);
+            makePreviewHtml();
+
+            if (panels.preview) {
+                panels.preview.scrollTop = 0;
+            }
+        };
+
+        init();
+    };
+
+    // Creates the background behind the hyperlink text entry box.
+    // And download dialog
+    // Most of this has been moved to CSS but the div creation and
+    // browser-specific hacks remain here.
+    ui.createBackground = function () {
+
+        var background = doc.createElement("div"),
+            style = background.style;
+        
+        background.className = "wmd-prompt-background";
+        
+        style.position = "absolute";
+        style.top = "0";
+
+        style.zIndex = "1000";
+
+        if (uaSniffed.isIE) {
+            style.filter = "alpha(opacity=50)";
+        }
+        else {
+            style.opacity = "0.5";
+        }
+
+        var pageSize = position.getPageSize();
+        style.height = pageSize[1] + "px";
+
+        if (uaSniffed.isIE) {
+            style.left = doc.documentElement.scrollLeft;
+            style.width = doc.documentElement.clientWidth;
+        }
+        else {
+            style.left = "0";
+            style.width = "100%";
+        }
+
+        doc.body.appendChild(background);
+        return background;
+    };
+
+    // This simulates a modal dialog box and asks for the URL when you
+    // click the hyperlink or image buttons.
+    //
+    // text: The html for the input box.
+    // defaultInputText: The default value that appears in the input box.
+    // callback: The function which is executed when the prompt is dismissed, either via OK or Cancel.
+    //      It receives a single argument; either the entered text (if OK was chosen) or null (if Cancel
+    //      was chosen).
+    ui.prompt = function (text, defaultInputText, callback, imageUploadHandler) {
+
+        // These variables need to be declared at this level since they are used
+        // in multiple functions.
+        var dialog;         // The dialog box.
+        var input;         // The text box where you enter the hyperlink.
+
+
+        if (defaultInputText === undefined) {
+            defaultInputText = "";
+        }
+
+        // Used as a keydown event handler. Esc dismisses the prompt.
+        // Key code 27 is ESC.
+        var checkEscape = function (key) {
+            var code = (key.charCode || key.keyCode);
+            if (code === 27) {
+                close(true);
+            }
+        };
+
+        // Dismisses the hyperlink input box.
+        // isCancel is true if we don't care about the input text.
+        // isCancel is false if we are going to keep the text.
+        var close = function (isCancel) {
+            util.removeEvent(doc.body, "keydown", checkEscape);
+            var text = input.value;
+
+            if (isCancel) {
+                text = null;
+            }
+            else {
+                // Fixes common pasting errors.
+                text = text.replace(/^http:\/\/(https?|ftp):\/\//, '$1://');
+                // doesn't change url if started with '/' (local)
+                if (!/^(?:https?|ftp):\/\//.test(text) && text.charAt(0) != '/') {
+                    text = 'http://' + text;
+                }
+            }
+
+            dialog.parentNode.removeChild(dialog);
+
+            callback(text);
+            return false;
+        };
+
+
+
+        // Create the text input box form/window.
+        var createDialog = function () {
+
+            // The main dialog box.
+            dialog = doc.createElement("div");
+            dialog.setAttribute("role", "dialog");
+            dialog.className = "wmd-prompt-dialog";
+            dialog.style.padding = "10px;";
+            dialog.style.position = "fixed";
+            dialog.style.width = "400px";
+            dialog.style.zIndex = "1001";
+
+            // The dialog text.
+            var question = doc.createElement("div");
+            question.innerHTML = text;
+            question.style.padding = "5px";
+            dialog.appendChild(question);
+
+            // The web form container for the text box and buttons.
+            var form = doc.createElement("form"),
+                style = form.style;
+            form.onsubmit = function () { return close(false); };
+            style.padding = "0";
+            style.margin = "0";
+            style.cssFloat = "left";
+            style.width = "100%";
+            style.textAlign = "center";
+            style.position = "relative";
+            dialog.appendChild(form);
+
+            // The input text box
+            input = doc.createElement("input");
+            input.type = "text";
+            input.value = defaultInputText;
+            style = input.style;
+            style.display = "block";
+            style.width = "80%";
+            style.marginLeft = style.marginRight = "auto";
+            form.appendChild(input);
+
+            // The choose file button if prompt type is 'image'
+
+            if (imageUploadHandler) {
+              var chooseFile = doc.createElement("input");
+              chooseFile.type = "file";
+              chooseFile.name = "file-upload";
+              chooseFile.id = "file-upload";
+              chooseFile.onchange = function() {
+                imageUploadHandler(this, input);
+              };
+              form.appendChild(doc.createElement("br"));
+              form.appendChild(chooseFile);
+            }
+
+
+            // The ok button
+            var okButton = doc.createElement("input");
+            okButton.type = "button";
+            okButton.onclick = function () { return close(false); };
+            okButton.value = "OK";
+            style = okButton.style;
+            style.margin = "10px";
+            style.display = "inline";
+            style.width = "7em";
+
+
+            // The cancel button
+            var cancelButton = doc.createElement("input");
+            cancelButton.type = "button";
+            cancelButton.onclick = function () { return close(true); };
+            cancelButton.value = "Cancel";
+            style = cancelButton.style;
+            style.margin = "10px";
+            style.display = "inline";
+            style.width = "7em";
+
+            form.appendChild(okButton);
+            form.appendChild(cancelButton);
+
+            util.addEvent(doc.body, "keydown", checkEscape);
+            dialog.style.top = "50%";
+            dialog.style.left = "50%";
+            dialog.style.display = "block";
+            if (uaSniffed.isIE_5or6) {
+                dialog.style.position = "absolute";
+                dialog.style.top = doc.documentElement.scrollTop + 200 + "px";
+                dialog.style.left = "50%";
+            }
+            doc.body.appendChild(dialog);
+
+            // This has to be done AFTER adding the dialog to the form if you
+            // want it to be centered.
+            dialog.style.marginTop = -(position.getHeight(dialog) / 2) + "px";
+            dialog.style.marginLeft = -(position.getWidth(dialog) / 2) + "px";
+
+        };
+
+        // Why is this in a zero-length timeout?
+        // Is it working around a browser bug?
+        setTimeout(function () {
+
+            createDialog();
+
+            var defTextLen = defaultInputText.length;
+            if (input.selectionStart !== undefined) {
+                input.selectionStart = 0;
+                input.selectionEnd = defTextLen;
+            }
+            else if (input.createTextRange) {
+                var range = input.createTextRange();
+                range.collapse(false);
+                range.moveStart("character", -defTextLen);
+                range.moveEnd("character", defTextLen);
+                range.select();
+            }
+
+            input.focus();
+        }, 0);
+    };
+
+    function UIManager(postfix, panels, undoManager, previewManager, commandManager, helpOptions, imageUploadHandler) {
+
+        var inputBox = panels.input,
+            buttons = {}; // buttons.undo, buttons.link, etc. The actual DOM elements.
+
+        makeSpritedButtonRow();
+
+        var keyEvent = "keydown";
+        if (uaSniffed.isOpera) {
+            keyEvent = "keypress";
+        }
+
+        util.addEvent(inputBox, keyEvent, function (key) {
+
+            // Check to see if we have a button key and, if so execute the callback.
+            if ((key.ctrlKey || key.metaKey) && !key.altKey && !key.shiftKey) {
+
+                var keyCode = key.charCode || key.keyCode;
+                var keyCodeStr = String.fromCharCode(keyCode).toLowerCase();
+
+                switch (keyCodeStr) {
+                    case "b":
+                        doClick(buttons.bold);
+                        break;
+                    case "i":
+                        doClick(buttons.italic);
+                        break;
+                    case "l":
+                        doClick(buttons.link);
+                        break;
+                    case "q":
+                        doClick(buttons.quote);
+                        break;
+                    case "k":
+                        doClick(buttons.code);
+                        break;
+                    case "g":
+                        doClick(buttons.image);
+                        break;
+                    case "o":
+                        doClick(buttons.olist);
+                        break;
+                    case "u":
+                        doClick(buttons.ulist);
+                        break;
+                    case "h":
+                        doClick(buttons.heading);
+                        break;
+                    case "r":
+                        doClick(buttons.hr);
+                        break;
+                    case "y":
+                        doClick(buttons.redo);
+                        break;
+                    case "z":
+                        if (key.shiftKey) {
+                            doClick(buttons.redo);
+                        }
+                        else {
+                            doClick(buttons.undo);
+                        }
+                        break;
+                    default:
+                        return;
+                }
+
+
+                if (key.preventDefault) {
+                    key.preventDefault();
+                }
+
+                if (window.event) {
+                    window.event.returnValue = false;
+                }
+            }
+        });
+
+        // Auto-indent on shift-enter
+        util.addEvent(inputBox, "keyup", function (key) {
+            if (key.shiftKey && !key.ctrlKey && !key.metaKey) {
+                var keyCode = key.charCode || key.keyCode;
+                // Character 13 is Enter
+                if (keyCode === 13) {
+                    var fakeButton = {};
+                    fakeButton.textOp = bindCommand("doAutoindent");
+                    doClick(fakeButton);
+                }
+            }
+        });
+
+        // special handler because IE clears the context of the textbox on ESC
+        if (uaSniffed.isIE) {
+            util.addEvent(inputBox, "keydown", function (key) {
+                var code = key.keyCode;
+                if (code === 27) {
+                    return false;
+                }
+            });
+        }
+
+
+        // Perform the button's action.
+        function doClick(button) {
+
+            inputBox.focus();
+
+            if (button.textOp) {
+
+                if (undoManager) {
+                    undoManager.setCommandMode();
+                }
+
+                var state = new TextareaState(panels);
+
+                if (!state) {
+                    return;
+                }
+
+                var chunks = state.getChunks();
+
+                // Some commands launch a "modal" prompt dialog.  Javascript
+                // can't really make a modal dialog box and the WMD code
+                // will continue to execute while the dialog is displayed.
+                // This prevents the dialog pattern I'm used to and means
+                // I can't do something like this:
+                //
+                // var link = CreateLinkDialog();
+                // makeMarkdownLink(link);
+                // 
+                // Instead of this straightforward method of handling a
+                // dialog I have to pass any code which would execute
+                // after the dialog is dismissed (e.g. link creation)
+                // in a function parameter.
+                //
+                // Yes this is awkward and I think it sucks, but there's
+                // no real workaround.  Only the image and link code
+                // create dialogs and require the function pointers.
+                var fixupInputArea = function () {
+
+                    inputBox.focus();
+
+                    if (chunks) {
+                        state.setChunks(chunks);
+                    }
+
+                    state.restore();
+                    previewManager.refresh();
+                };
+
+                var noCleanup = button.textOp(chunks, fixupInputArea);
+
+                if (!noCleanup) {
+                    fixupInputArea();
+                }
+
+            }
+
+            if (button.execute) {
+                button.execute(undoManager);
+            }
+        };
+
+        function setupButton(button, isEnabled) {
+
+            var normalYShift = "0px";
+            var disabledYShift = "-20px";
+            var highlightYShift = "-40px";
+            var image = button.getElementsByTagName("span")[0];
+            if (isEnabled) {
+                image.style.backgroundPosition = button.XShift + " " + normalYShift;
+                button.onmouseover = function () {
+                    image.style.backgroundPosition = this.XShift + " " + highlightYShift;
+                };
+
+                button.onmouseout = function () {
+                    image.style.backgroundPosition = this.XShift + " " + normalYShift;
+                };
+
+                // IE tries to select the background image "button" text (it's
+                // implemented in a list item) so we have to cache the selection
+                // on mousedown.
+                if (uaSniffed.isIE) {
+                    button.onmousedown = function () {
+                        if (doc.activeElement && doc.activeElement !== panels.input) { // we're not even in the input box, so there's no selection
+                            return;
+                        }
+                        panels.ieCachedRange = document.selection.createRange();
+                        panels.ieCachedScrollTop = panels.input.scrollTop;
+                    };
+                }
+
+                if (!button.isHelp) {
+                    button.onclick = function () {
+                        if (this.onmouseout) {
+                            this.onmouseout();
+                        }
+                        doClick(this);
+                        return false;
+                    }
+                    util.addEvent(button, "keydown", function(event) {
+                        var keyCode = event.charCode || event.keyCode;
+                        if (keyCode == 32 || keyCode == 13) {
+                            if (event.preventDefault) {
+                                event.preventDefault();
+                            }
+                            if (window.event) {
+                                window.event.returnValue = false;
+                            }
+                            doClick(button);
+                        }
+                    })
+                }
+            }
+            else {
+                image.style.backgroundPosition = button.XShift + " " + disabledYShift;
+                button.onmouseover = button.onmouseout = button.onclick = function () { };
+            }
+        }
+
+        function bindCommand(method) {
+            if (typeof method === "string")
+                method = commandManager[method];
+            return function () { method.apply(commandManager, arguments); }
+        }
+
+        function makeSpritedButtonRow() {
+
+            var buttonBar = panels.buttonBar;
+
+            var normalYShift = "0px";
+            var disabledYShift = "-20px";
+            var highlightYShift = "-40px";
+
+            var buttonRow = document.createElement("div");
+            buttonRow.setAttribute("role", "toolbar");
+            buttonRow.id = "wmd-button-row" + postfix;
+            buttonRow.className = 'wmd-button-row';
+            buttonRow = buttonBar.appendChild(buttonRow);
+            var xPosition = 0;
+            var makeButton = function (id, title, XShift, textOp) {
+                var button = document.createElement("span");
+                button.setAttribute("role", "button");
+                button.tabIndex = 0;
+                button.className = "wmd-button";
+                button.style.left = xPosition + "px";
+                xPosition += 25;
+                var buttonImage = document.createElement("span");
+                button.id = id + postfix;
+                button.appendChild(buttonImage);
+                button.title = title;
+                button.XShift = XShift;
+                if (textOp)
+                    button.textOp = textOp;
+                setupButton(button, true);
+                buttonRow.appendChild(button);
+                return button;
+            };
+            var makeSpacer = function (num) {
+                var spacer = document.createElement("span");
+                spacer.setAttribute("role", "separator");
+                spacer.className = "wmd-spacer wmd-spacer" + num;
+                spacer.id = "wmd-spacer" + num + postfix;
+                buttonRow.appendChild(spacer);
+                xPosition += 25;
+            }
+
+            buttons.bold = makeButton("wmd-bold-button", gettext("Bold (Ctrl+B)"), "0px", bindCommand("doBold"));
+            buttons.italic = makeButton("wmd-italic-button", gettext("Italic (Ctrl+I)"), "-20px", bindCommand("doItalic"));
+            makeSpacer(1);
+            buttons.link = makeButton("wmd-link-button", gettext("Hyperlink (Ctrl+L)"), "-40px", bindCommand(function (chunk, postProcessing) {
+                return this.doLinkOrImage(chunk, postProcessing, false);
+            }));
+            buttons.quote = makeButton("wmd-quote-button", gettext("Blockquote (Ctrl+Q)"), "-60px", bindCommand("doBlockquote"));
+            buttons.code = makeButton("wmd-code-button", gettext("Code Sample (Ctrl+K)"), "-80px", bindCommand("doCode"));
+            buttons.image = makeButton("wmd-image-button", gettext("Image (Ctrl+G)"), "-100px", bindCommand(function (chunk, postProcessing) {
+                return this.doLinkOrImage(chunk, postProcessing, true, imageUploadHandler);
+            }));
+            makeSpacer(2);
+            buttons.olist = makeButton("wmd-olist-button", gettext("Numbered List (Ctrl+O)"), "-120px", bindCommand(function (chunk, postProcessing) {
+                this.doList(chunk, postProcessing, true);
+            }));
+            buttons.ulist = makeButton("wmd-ulist-button", gettext("Bulleted List (Ctrl+U)"), "-140px", bindCommand(function (chunk, postProcessing) {
+                this.doList(chunk, postProcessing, false);
+            }));
+            buttons.heading = makeButton("wmd-heading-button", gettext("Heading (Ctrl+H)"), "-160px", bindCommand("doHeading"));
+            buttons.hr = makeButton("wmd-hr-button", gettext("Horizontal Rule (Ctrl+R)"), "-180px", bindCommand("doHorizontalRule"));
+            makeSpacer(3);
+            buttons.undo = makeButton("wmd-undo-button", gettext("Undo (Ctrl+Z)"), "-200px", null);
+            buttons.undo.execute = function (manager) { if (manager) manager.undo(); };
+
+            var redoTitle = /win/.test(nav.platform.toLowerCase()) ?
+                gettext("Redo (Ctrl+Y)") :
+                gettext("Redo (Ctrl+Shift+Z)"); // mac and other non-Windows platforms
+
+            buttons.redo = makeButton("wmd-redo-button", redoTitle, "-220px", null);
+            buttons.redo.execute = function (manager) { if (manager) manager.redo(); };
+
+            if (helpOptions) {
+                var helpButton = document.createElement("span");
+                var helpButtonImage = document.createElement("span");
+                helpButton.appendChild(helpButtonImage);
+                helpButton.className = "wmd-button wmd-help-button";
+                helpButton.id = "wmd-help-button" + postfix;
+                helpButton.XShift = "-240px";
+                helpButton.isHelp = true;
+                helpButton.style.right = "0px";
+                helpButton.title = helpOptions.title || defaultHelpHoverTitle;
+                helpButton.onclick = helpOptions.handler;
+
+                setupButton(helpButton, true);
+                buttonRow.appendChild(helpButton);
+                buttons.help = helpButton;
+            }
+
+            setUndoRedoButtonStates();
+        }
+
+        function setUndoRedoButtonStates() {
+            if (undoManager) {
+                setupButton(buttons.undo, undoManager.canUndo());
+                setupButton(buttons.redo, undoManager.canRedo());
+            }
+        };
+
+        this.setUndoRedoButtonStates = setUndoRedoButtonStates;
+
+    }
+
+    function CommandManager(pluginHooks) {
+        this.hooks = pluginHooks;
+    }
+
+    var commandProto = CommandManager.prototype;
+
+    // The markdown symbols - 4 spaces = code, > = blockquote, etc.
+    commandProto.prefixes = "(?:\\s{4,}|\\s*>|\\s*-\\s+|\\s*\\d+\\.|=|\\+|-|_|\\*|#|\\s*\\[[^\n]]+\\]:)";
+
+    // Remove markdown symbols from the chunk selection.
+    commandProto.unwrap = function (chunk) {
+        var txt = new re("([^\\n])\\n(?!(\\n|" + this.prefixes + "))", "g");
+        chunk.selection = chunk.selection.replace(txt, "$1 $2");
+    };
+
+    commandProto.wrap = function (chunk, len) {
+        this.unwrap(chunk);
+        var regex = new re("(.{1," + len + "})( +|$\\n?)", "gm"),
+            that = this;
+
+        chunk.selection = chunk.selection.replace(regex, function (line, marked) {
+            if (new re("^" + that.prefixes, "").test(line)) {
+                return line;
+            }
+            return marked + "\n";
+        });
+
+        chunk.selection = chunk.selection.replace(/\s+$/, "");
+    };
+
+    commandProto.doBold = function (chunk, postProcessing) {
+        return this.doBorI(chunk, postProcessing, 2, gettext("strong text"));
+    };
+
+    commandProto.doItalic = function (chunk, postProcessing) {
+        return this.doBorI(chunk, postProcessing, 1, gettext("emphasized text"));
+    };
+
+    // chunk: The selected region that will be enclosed with */**
+    // nStars: 1 for italics, 2 for bold
+    // insertText: If you just click the button without highlighting text, this gets inserted
+    commandProto.doBorI = function (chunk, postProcessing, nStars, insertText) {
+
+        // Get rid of whitespace and fixup newlines.
+        chunk.trimWhitespace();
+        chunk.selection = chunk.selection.replace(/\n{2,}/g, "\n");
+
+        // Look for stars before and after.  Is the chunk already marked up?
+        // note that these regex matches cannot fail
+        var starsBefore = /(\**$)/.exec(chunk.before)[0];
+        var starsAfter = /(^\**)/.exec(chunk.after)[0];
+
+        var prevStars = Math.min(starsBefore.length, starsAfter.length);
+
+        // Remove stars if we have to since the button acts as a toggle.
+        if ((prevStars >= nStars) && (prevStars != 2 || nStars != 1)) {
+            chunk.before = chunk.before.replace(re("[*]{" + nStars + "}$", ""), "");
+            chunk.after = chunk.after.replace(re("^[*]{" + nStars + "}", ""), "");
+        }
+        else if (!chunk.selection && starsAfter) {
+            // It's not really clear why this code is necessary.  It just moves
+            // some arbitrary stuff around.
+            chunk.after = chunk.after.replace(/^([*_]*)/, "");
+            chunk.before = chunk.before.replace(/(\s?)$/, "");
+            var whitespace = re.$1;
+            chunk.before = chunk.before + starsAfter + whitespace;
+        }
+        else {
+
+            // In most cases, if you don't have any selected text and click the button
+            // you'll get a selected, marked up region with the default text inserted.
+            if (!chunk.selection && !starsAfter) {
+                chunk.selection = insertText;
+            }
+
+            // Add the true markup.
+            var markup = nStars <= 1 ? "*" : "**"; // shouldn't the test be = ?
+            chunk.before = chunk.before + markup;
+            chunk.after = markup + chunk.after;
+        }
+
+        return;
+    };
+
+    commandProto.stripLinkDefs = function (text, defsToAdd) {
+
+        text = text.replace(/^[ ]{0,3}\[(\d+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|$)/gm,
+            function (totalMatch, id, link, newlines, title) {
+                defsToAdd[id] = totalMatch.replace(/\s*$/, "");
+                if (newlines) {
+                    // Strip the title and return that separately.
+                    defsToAdd[id] = totalMatch.replace(/["(](.+?)[")]$/, "");
+                    return newlines + title;
+                }
+                return "";
+            });
+
+        return text;
+    };
+
+    commandProto.addLinkDef = function (chunk, linkDef) {
+
+        var refNumber = 0; // The current reference number
+        var defsToAdd = {}; //
+        // Start with a clean slate by removing all previous link definitions.
+        chunk.before = this.stripLinkDefs(chunk.before, defsToAdd);
+        chunk.selection = this.stripLinkDefs(chunk.selection, defsToAdd);
+        chunk.after = this.stripLinkDefs(chunk.after, defsToAdd);
+
+        var defs = "";
+        var regex = /(\[)((?:\[[^\]]*\]|[^\[\]])*)(\][ ]?(?:\n[ ]*)?\[)(\d+)(\])/g;
+
+        var addDefNumber = function (def) {
+            refNumber++;
+            def = def.replace(/^[ ]{0,3}\[(\d+)\]:/, "  [" + refNumber + "]:");
+            defs += "\n" + def;
+        };
+
+        // note that
+        // a) the recursive call to getLink cannot go infinite, because by definition
+        //    of regex, inner is always a proper substring of wholeMatch, and
+        // b) more than one level of nesting is neither supported by the regex
+        //    nor making a lot of sense (the only use case for nesting is a linked image)
+        var getLink = function (wholeMatch, before, inner, afterInner, id, end) {
+            inner = inner.replace(regex, getLink);
+            if (defsToAdd[id]) {
+                addDefNumber(defsToAdd[id]);
+                return before + inner + afterInner + refNumber + end;
+            }
+            return wholeMatch;
+        };
+
+        chunk.before = chunk.before.replace(regex, getLink);
+
+        if (linkDef) {
+            addDefNumber(linkDef);
+        }
+        else {
+            chunk.selection = chunk.selection.replace(regex, getLink);
+        }
+
+        var refOut = refNumber;
+
+        chunk.after = chunk.after.replace(regex, getLink);
+
+        if (chunk.after) {
+            chunk.after = chunk.after.replace(/\n*$/, "");
+        }
+        if (!chunk.after) {
+            chunk.selection = chunk.selection.replace(/\n*$/, "");
+        }
+
+        chunk.after += "\n\n" + defs;
+
+        return refOut;
+    };
+
+    // takes the line as entered into the add link/as image dialog and makes
+    // sure the URL and the optinal title are "nice".
+    function properlyEncoded(linkdef) {
+        return linkdef.replace(/^\s*(.*?)(?:\s+"(.+)")?\s*$/, function (wholematch, link, title) {
+            link = link.replace(/\?.*$/, function (querypart) {
+                return querypart.replace(/\+/g, " "); // in the query string, a plus and a space are identical
+            });
+            link = decodeURIComponent(link); // unencode first, to prevent double encoding
+            link = encodeURI(link).replace(/'/g, '%27').replace(/\(/g, '%28').replace(/\)/g, '%29');
+            link = link.replace(/\?.*$/, function (querypart) {
+                return querypart.replace(/\+/g, "%2b"); // since we replaced plus with spaces in the query part, all pluses that now appear where originally encoded
+            });
+            if (title) {
+                title = title.trim ? title.trim() : title.replace(/^\s*/, "").replace(/\s*$/, "");
+                title = $.trim(title).replace(/"/g, "quot;").replace(/\(/g, "&#40;").replace(/\)/g, "&#41;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+            }
+            return title ? link + ' "' + title + '"' : link;
+        });
+    }
+
+    commandProto.doLinkOrImage = function (chunk, postProcessing, isImage, imageUploadHandler) {
+
+        chunk.trimWhitespace();
+        chunk.findTags(/\s*!?\[/, /\][ ]?(?:\n[ ]*)?(\[.*?\])?/);
+        var background;
+
+        if (chunk.endTag.length > 1 && chunk.startTag.length > 0) {
+
+            chunk.startTag = chunk.startTag.replace(/!?\[/, "");
+            chunk.endTag = "";
+            this.addLinkDef(chunk, null);
+
+        }
+        else {
+            
+            // We're moving start and end tag back into the selection, since (as we're in the else block) we're not
+            // *removing* a link, but *adding* one, so whatever findTags() found is now back to being part of the
+            // link text. linkEnteredCallback takes care of escaping any brackets.
+            chunk.selection = chunk.startTag + chunk.selection + chunk.endTag;
+            chunk.startTag = chunk.endTag = "";
+
+            if (/\n\n/.test(chunk.selection)) {
+                this.addLinkDef(chunk, null);
+                return;
+            }
+            var that = this;
+            // The function to be executed when you enter a link and press OK or Cancel.
+            // Marks up the link and adds the ref.
+            var linkEnteredCallback = function (link) {
+
+                background.parentNode.removeChild(background);
+
+                if (link !== null) {
+                    // (                          $1
+                    //     [^\\]                  anything that's not a backslash
+                    //     (?:\\\\)*              an even number (this includes zero) of backslashes
+                    // )
+                    // (?=                        followed by
+                    //     [[\]]                  an opening or closing bracket
+                    // )
+                    //
+                    // In other words, a non-escaped bracket. These have to be escaped now to make sure they
+                    // don't count as the end of the link or similar.
+                    // Note that the actual bracket has to be a lookahead, because (in case of to subsequent brackets),
+                    // the bracket in one match may be the "not a backslash" character in the next match, so it
+                    // should not be consumed by the first match.
+                    // The "prepend a space and finally remove it" steps makes sure there is a "not a backslash" at the
+                    // start of the string, so this also works if the selection begins with a bracket. We cannot solve
+                    // this by anchoring with ^, because in the case that the selection starts with two brackets, this
+                    // would mean a zero-width match at the start. Since zero-width matches advance the string position,
+                    // the first bracket could then not act as the "not a backslash" for the second.
+                    chunk.selection = (" " + chunk.selection).replace(/([^\\](?:\\\\)*)(?=[[\]])/g, "$1\\").substr(1);
+                    
+                    var linkDef = " [999]: " + properlyEncoded(link);
+
+                    var num = that.addLinkDef(chunk, linkDef);
+                    chunk.startTag = isImage ? "![" : "[";
+                    chunk.endTag = "][" + num + "]";
+
+                    if (!chunk.selection) {
+                        if (isImage) {
+                            chunk.selection = gettext("enter image description here");
+                        }
+                        else {
+                            chunk.selection = gettext("enter link description here");
+                        }
+                    }
+                }
+                postProcessing();
+            };
+
+            background = ui.createBackground();
+
+            if (isImage) {
+                if (!this.hooks.insertImageDialog(linkEnteredCallback))
+                    ui.prompt(imageDialogText, imageDefaultText, linkEnteredCallback, imageUploadHandler);
+            }
+            else {
+                ui.prompt(linkDialogText, linkDefaultText, linkEnteredCallback);
+            }
+            return true;
+        }
+    };
+
+    // When making a list, hitting shift-enter will put your cursor on the next line
+    // at the current indent level.
+    commandProto.doAutoindent = function (chunk, postProcessing) {
+
+        var commandMgr = this,
+            fakeSelection = false;
+
+        chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]*\n$/, "\n\n");
+        chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}>[ \t]*\n$/, "\n\n");
+        chunk.before = chunk.before.replace(/(\n|^)[ \t]+\n$/, "\n\n");
+        
+        // There's no selection, end the cursor wasn't at the end of the line:
+        // The user wants to split the current list item / code line / blockquote line
+        // (for the latter it doesn't really matter) in two. Temporarily select the
+        // (rest of the) line to achieve this.
+        if (!chunk.selection && !/^[ \t]*(?:\n|$)/.test(chunk.after)) {
+            chunk.after = chunk.after.replace(/^[^\n]*/, function (wholeMatch) {
+                chunk.selection = wholeMatch;
+                return "";
+            });
+            fakeSelection = true;
+        }
+
+        if (/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]+.*\n$/.test(chunk.before)) {
+            if (commandMgr.doList) {
+                commandMgr.doList(chunk);
+            }
+        }
+        if (/(\n|^)[ ]{0,3}>[ \t]+.*\n$/.test(chunk.before)) {
+            if (commandMgr.doBlockquote) {
+                commandMgr.doBlockquote(chunk);
+            }
+        }
+        if (/(\n|^)(\t|[ ]{4,}).*\n$/.test(chunk.before)) {
+            if (commandMgr.doCode) {
+                commandMgr.doCode(chunk);
+            }
+        }
+        
+        if (fakeSelection) {
+            chunk.after = chunk.selection + chunk.after;
+            chunk.selection = "";
+        }
+    };
+
+    commandProto.doBlockquote = function (chunk, postProcessing) {
+
+        chunk.selection = chunk.selection.replace(/^(\n*)([^\r]+?)(\n*)$/,
+            function (totalMatch, newlinesBefore, text, newlinesAfter) {
+                chunk.before += newlinesBefore;
+                chunk.after = newlinesAfter + chunk.after;
+                return text;
+            });
+
+        chunk.before = chunk.before.replace(/(>[ \t]*)$/,
+            function (totalMatch, blankLine) {
+                chunk.selection = blankLine + chunk.selection;
+                return "";
+            });
+
+        chunk.selection = chunk.selection.replace(/^(\s|>)+$/, "");
+        chunk.selection = chunk.selection || gettext("Blockquote");
+
+        // The original code uses a regular expression to find out how much of the
+        // text *directly before* the selection already was a blockquote:
+
+        /*
+        if (chunk.before) {
+        chunk.before = chunk.before.replace(/\n?$/, "\n");
+        }
+        chunk.before = chunk.before.replace(/(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*$)/,
+        function (totalMatch) {
+        chunk.startTag = totalMatch;
+        return "";
+        });
+        */
+
+        // This comes down to:
+        // Go backwards as many lines a possible, such that each line
+        //  a) starts with ">", or
+        //  b) is almost empty, except for whitespace, or
+        //  c) is preceeded by an unbroken chain of non-empty lines
+        //     leading up to a line that starts with ">" and at least one more character
+        // and in addition
+        //  d) at least one line fulfills a)
+        //
+        // Since this is essentially a backwards-moving regex, it's susceptible to
+        // catstrophic backtracking and can cause the browser to hang;
+        // see e.g. http://meta.stackoverflow.com/questions/9807.
+        //
+        // Hence we replaced this by a simple state machine that just goes through the
+        // lines and checks for a), b), and c).
+
+        var match = "",
+            leftOver = "",
+            line;
+        if (chunk.before) {
+            var lines = chunk.before.replace(/\n$/, "").split("\n");
+            var inChain = false;
+            for (var i = 0; i < lines.length; i++) {
+                var good = false;
+                line = lines[i];
+                inChain = inChain && line.length > 0; // c) any non-empty line continues the chain
+                if (/^>/.test(line)) {                // a)
+                    good = true;
+                    if (!inChain && line.length > 1)  // c) any line that starts with ">" and has at least one more character starts the chain
+                        inChain = true;
+                } else if (/^[ \t]*$/.test(line)) {   // b)
+                    good = true;
+                } else {
+                    good = inChain;                   // c) the line is not empty and does not start with ">", so it matches if and only if we're in the chain
+                }
+                if (good) {
+                    match += line + "\n";
+                } else {
+                    leftOver += match + line;
+                    match = "\n";
+                }
+            }
+            if (!/(^|\n)>/.test(match)) {             // d)
+                leftOver += match;
+                match = "";
+            }
+        }
+
+        chunk.startTag = match;
+        chunk.before = leftOver;
+
+        // end of change
+
+        if (chunk.after) {
+            chunk.after = chunk.after.replace(/^\n?/, "\n");
+        }
+
+        chunk.after = chunk.after.replace(/^(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*)/,
+            function (totalMatch) {
+                chunk.endTag = totalMatch;
+                return "";
+            }
+        );
+
+        var replaceBlanksInTags = function (useBracket) {
+
+            var replacement = useBracket ? "> " : "";
+
+            if (chunk.startTag) {
+                chunk.startTag = chunk.startTag.replace(/\n((>|\s)*)\n$/,
+                    function (totalMatch, markdown) {
+                        return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+                    });
+            }
+            if (chunk.endTag) {
+                chunk.endTag = chunk.endTag.replace(/^\n((>|\s)*)\n/,
+                    function (totalMatch, markdown) {
+                        return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+                    });
+            }
+        };
+
+        if (/^(?![ ]{0,3}>)/m.test(chunk.selection)) {
+            this.wrap(chunk, SETTINGS.lineLength - 2);
+            chunk.selection = chunk.selection.replace(/^/gm, "> ");
+            replaceBlanksInTags(true);
+            chunk.skipLines();
+        } else {
+            chunk.selection = chunk.selection.replace(/^[ ]{0,3}> ?/gm, "");
+            this.unwrap(chunk);
+            replaceBlanksInTags(false);
+
+            if (!/^(\n|^)[ ]{0,3}>/.test(chunk.selection) && chunk.startTag) {
+                chunk.startTag = chunk.startTag.replace(/\n{0,2}$/, "\n\n");
+            }
+
+            if (!/(\n|^)[ ]{0,3}>.*$/.test(chunk.selection) && chunk.endTag) {
+                chunk.endTag = chunk.endTag.replace(/^\n{0,2}/, "\n\n");
+            }
+        }
+
+        chunk.selection = this.hooks.postBlockquoteCreation(chunk.selection);
+
+        if (!/\n/.test(chunk.selection)) {
+            chunk.selection = chunk.selection.replace(/^(> *)/,
+            function (wholeMatch, blanks) {
+                chunk.startTag += blanks;
+                return "";
+            });
+        }
+    };
+
+    commandProto.doCode = function (chunk, postProcessing) {
+
+        var hasTextBefore = /\S[ ]*$/.test(chunk.before);
+        var hasTextAfter = /^[ ]*\S/.test(chunk.after);
+
+        // Use 'four space' markdown if the selection is on its own
+        // line or is multiline.
+        if ((!hasTextAfter && !hasTextBefore) || /\n/.test(chunk.selection)) {
+
+            chunk.before = chunk.before.replace(/[ ]{4}$/,
+                function (totalMatch) {
+                    chunk.selection = totalMatch + chunk.selection;
+                    return "";
+                });
+
+            var nLinesBack = 1;
+            var nLinesForward = 1;
+
+            if (/(\n|^)(\t|[ ]{4,}).*\n$/.test(chunk.before)) {
+                nLinesBack = 0;
+            }
+            if (/^\n(\t|[ ]{4,})/.test(chunk.after)) {
+                nLinesForward = 0;
+            }
+
+            chunk.skipLines(nLinesBack, nLinesForward);
+
+            if (!chunk.selection) {
+                chunk.startTag = "    ";
+                chunk.selection = gettext("enter code here");
+            }
+            else {
+                if (/^[ ]{0,3}\S/m.test(chunk.selection)) {
+                    if (/\n/.test(chunk.selection))
+                        chunk.selection = chunk.selection.replace(/^/gm, "    ");
+                    else // if it's not multiline, do not select the four added spaces; this is more consistent with the doList behavior
+                        chunk.before += "    ";
+                }
+                else {
+                    chunk.selection = chunk.selection.replace(/^[ ]{4}/gm, "");
+                }
+            }
+        }
+        else {
+            // Use backticks (`) to delimit the code block.
+
+            chunk.trimWhitespace();
+            chunk.findTags(/`/, /`/);
+
+            if (!chunk.startTag && !chunk.endTag) {
+                chunk.startTag = chunk.endTag = "`";
+                if (!chunk.selection) {
+                    chunk.selection = gettext("enter code here");
+                }
+            }
+            else if (chunk.endTag && !chunk.startTag) {
+                chunk.before += chunk.endTag;
+                chunk.endTag = "";
+            }
+            else {
+                chunk.startTag = chunk.endTag = "";
+            }
+        }
+    };
+
+    commandProto.doList = function (chunk, postProcessing, isNumberedList) {
+
+        // These are identical except at the very beginning and end.
+        // Should probably use the regex extension function to make this clearer.
+        var previousItemsRegex = /(\n|^)(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*$/;
+        var nextItemsRegex = /^\n*(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*/;
+
+        // The default bullet is a dash but others are possible.
+        // This has nothing to do with the particular HTML bullet,
+        // it's just a markdown bullet.
+        var bullet = "-";
+
+        // The number in a numbered list.
+        var num = 1;
+
+        // Get the item prefix - e.g. " 1. " for a numbered list, " - " for a bulleted list.
+        var getItemPrefix = function () {
+            var prefix;
+            if (isNumberedList) {
+                prefix = " " + num + ". ";
+                num++;
+            }
+            else {
+                prefix = " " + bullet + " ";
+            }
+            return prefix;
+        };
+
+        // Fixes the prefixes of the other list items.
+        var getPrefixedItem = function (itemText) {
+
+            // The numbering flag is unset when called by autoindent.
+            if (isNumberedList === undefined) {
+                isNumberedList = /^\s*\d/.test(itemText);
+            }
+
+            // Renumber/bullet the list element.
+            itemText = itemText.replace(/^[ ]{0,3}([*+-]|\d+[.])\s/gm,
+                function (_) {
+                    return getItemPrefix();
+                });
+
+            return itemText;
+        };
+
+        chunk.findTags(/(\n|^)*[ ]{0,3}([*+-]|\d+[.])\s+/, null);
+
+        if (chunk.before && !/\n$/.test(chunk.before) && !/^\n/.test(chunk.startTag)) {
+            chunk.before += chunk.startTag;
+            chunk.startTag = "";
+        }
+
+        if (chunk.startTag) {
+
+            var hasDigits = /\d+[.]/.test(chunk.startTag);
+            chunk.startTag = "";
+            chunk.selection = chunk.selection.replace(/\n[ ]{4}/g, "\n");
+            this.unwrap(chunk);
+            chunk.skipLines();
+
+            if (hasDigits) {
+                // Have to renumber the bullet points if this is a numbered list.
+                chunk.after = chunk.after.replace(nextItemsRegex, getPrefixedItem);
+            }
+            if (isNumberedList == hasDigits) {
+                return;
+            }
+        }
+
+        var nLinesUp = 1;
+
+        chunk.before = chunk.before.replace(previousItemsRegex,
+            function (itemText) {
+                if (/^\s*([*+-])/.test(itemText)) {
+                    bullet = re.$1;
+                }
+                nLinesUp = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+                return getPrefixedItem(itemText);
+            });
+
+        if (!chunk.selection) {
+            chunk.selection = gettext("List item");
+        }
+
+        var prefix = getItemPrefix();
+
+        var nLinesDown = 1;
+
+        chunk.after = chunk.after.replace(nextItemsRegex,
+            function (itemText) {
+                nLinesDown = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+                return getPrefixedItem(itemText);
+            });
+
+        chunk.trimWhitespace(true);
+        chunk.skipLines(nLinesUp, nLinesDown, true);
+        chunk.startTag = prefix;
+        var spaces = prefix.replace(/./g, " ");
+        this.wrap(chunk, SETTINGS.lineLength - spaces.length);
+        chunk.selection = chunk.selection.replace(/\n/g, "\n" + spaces);
+
+    };
+
+    commandProto.doHeading = function (chunk, postProcessing) {
+
+        // Remove leading/trailing whitespace and reduce internal spaces to single spaces.
+        chunk.selection = chunk.selection.replace(/\s+/g, " ");
+        chunk.selection = chunk.selection.replace(/(^\s+|\s+$)/g, "");
+
+        // If we clicked the button with no selected text, we just
+        // make a level 2 hash header around some default text.
+        if (!chunk.selection) {
+            chunk.startTag = "## ";
+            chunk.selection = gettext("Heading");
+            chunk.endTag = " ##";
+            return;
+        }
+
+        var headerLevel = 0;     // The existing header level of the selected text.
+
+        // Remove any existing hash heading markdown and save the header level.
+        chunk.findTags(/#+[ ]*/, /[ ]*#+/);
+        if (/#+/.test(chunk.startTag)) {
+            headerLevel = re.lastMatch.length;
+        }
+        chunk.startTag = chunk.endTag = "";
+
+        // Try to get the current header level by looking for - and = in the line
+        // below the selection.
+        chunk.findTags(null, /\s?(-+|=+)/);
+        if (/=+/.test(chunk.endTag)) {
+            headerLevel = 1;
+        }
+        if (/-+/.test(chunk.endTag)) {
+            headerLevel = 2;
+        }
+
+        // Skip to the next line so we can create the header markdown.
+        chunk.startTag = chunk.endTag = "";
+        chunk.skipLines(1, 1);
+
+        // We make a level 2 header if there is no current header.
+        // If there is a header level, we substract one from the header level.
+        // If it's already a level 1 header, it's removed.
+        var headerLevelToCreate = headerLevel == 0 ? 2 : headerLevel - 1;
+
+        if (headerLevelToCreate > 0) {
+
+            // The button only creates level 1 and 2 underline headers.
+            // Why not have it iterate over hash header levels?  Wouldn't that be easier and cleaner?
+            var headerChar = headerLevelToCreate >= 2 ? "-" : "=";
+            var len = chunk.selection.length;
+            if (len > SETTINGS.lineLength) {
+                len = SETTINGS.lineLength;
+            }
+            chunk.endTag = "\n";
+            while (len--) {
+                chunk.endTag += headerChar;
+            }
+        }
+    };
+
+    commandProto.doHorizontalRule = function (chunk, postProcessing) {
+        chunk.startTag = "----------\n";
+        chunk.selection = "";
+        chunk.skipLines(2, 1, true);
+    }
+
+
+})();

common/static/xblock/discussion/js/vendor/Markdown.Sanitizer.js

+(function () {
+    var output, Converter;
+    if (typeof exports === "object" && typeof require === "function") { // we're in a CommonJS (e.g. Node.js) module
+        output = exports;
+        Converter = require("./Markdown.Converter").Converter;
+    } else {
+        output = window.Markdown;
+        Converter = output.Converter;
+    }
+        
+    output.getSanitizingConverter = function () {
+        var converter = new Converter();
+        converter.hooks.chain("postConversion", sanitizeHtml);
+        converter.hooks.chain("postConversion", balanceTags);
+        return converter;
+    }
+
+    function sanitizeHtml(html) {
+        return html.replace(/<[^>]*>?/gi, sanitizeTag);
+    }
+
+    // (tags that can be opened/closed) | (tags that stand alone)
+    var basic_tag_whitelist = /^(<\/?(b|blockquote|code|del|dd|dl|dt|em|h1|h2|h3|i|kbd|li|ol|p|pre|s|sup|sub|strong|strike|ul)>|<(br|hr)\s?\/?>)$/i;
+    // <a href="url..." optional title>|</a>
+    var a_white = /^(<a\shref="((https?|ftp):\/\/|\/)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\stitle="[^"<>]+")?\s?>|<\/a>)$/i;
+
+    // <img src="url..." optional width  optional height  optional alt  optional title
+    var img_white = /^(<img\ssrc="(https?:\/\/|\/)[-A-Za-z0-9+&@#\/%?=~_|!:,.;\(\)]+"(\swidth="\d{1,3}")?(\sheight="\d{1,3}")?(\salt="[^"<>]*")?(\stitle="[^"<>]*")?\s?\/?>)$/i;
+
+    function sanitizeTag(tag) {
+        if (tag.match(basic_tag_whitelist) || tag.match(a_white) || tag.match(img_white))
+            return tag;
+        else
+            return "";
+    }
+
+    /// <summary>
+    /// attempt to balance HTML tags in the html string
+    /// by removing any unmatched opening or closing tags
+    /// IMPORTANT: we *assume* HTML has *already* been 
+    /// sanitized and is safe/sane before balancing!
+    /// 
+    /// adapted from CODESNIPPET: A8591DBA-D1D3-11DE-947C-BA5556D89593
+    /// </summary>
+    function balanceTags(html) {
+
+        if (html == "")
+            return "";
+
+        var re = /<\/?\w+[^>]*(\s|$|>)/g;
+        // convert everything to lower case; this makes
+        // our case insensitive comparisons easier
+        var tags = html.toLowerCase().match(re);
+
+        // no HTML tags present? nothing to do; exit now
+        var tagcount = (tags || []).length;
+        if (tagcount == 0)
+            return html;
+
+        var tagname, tag;
+        var ignoredtags = "<p><img><br><li><hr>";
+        var match;
+        var tagpaired = [];
+        var tagremove = [];
+        var needsRemoval = false;
+
+        // loop through matched tags in forward order
+        for (var ctag = 0; ctag < tagcount; ctag++) {
+            tagname = tags[ctag].replace(/<\/?(\w+).*/, "$1");
+            // skip any already paired tags
+            // and skip tags in our ignore list; assume they're self-closed
+            if (tagpaired[ctag] || ignoredtags.search("<" + tagname + ">") > -1)
+                continue;
+
+            tag = tags[ctag];
+            match = -1;
+
+            if (!/^<\//.test(tag)) {
+                // this is an opening tag
+                // search forwards (next tags), look for closing tags
+                for (var ntag = ctag + 1; ntag < tagcount; ntag++) {
+                    if (!tagpaired[ntag] && tags[ntag] == "</" + tagname + ">") {
+                        match = ntag;
+                        break;
+                    }
+                }
+            }
+
+            if (match == -1)
+                needsRemoval = tagremove[ctag] = true; // mark for removal
+            else
+                tagpaired[match] = true; // mark paired
+        }
+
+        if (!needsRemoval)
+            return html;
+
+        // delete all orphaned tags from the string
+
+        var ctag = 0;
+        html = html.replace(re, function (match) {
+            var res = tagremove[ctag] ? "" : match;
+            ctag++;
+            return res;
+        });
+        return html;
+    }
+})();

common/static/xblock/discussion/js/vendor/customwmd.js

+// Generated by CoffeeScript 1.6.1
+(function() {
+
+  $(function() {
+    var HUB, MathJaxProcessor;
+    if (typeof MathJax === "undefined" || MathJax === null) {
+      return;
+    }
+    HUB = MathJax.Hub;
+    MathJaxProcessor = (function() {
+      var CODESPAN, MATHSPLIT;
+
+      MATHSPLIT = /(\$\$?|\\(?:begin|end)\{[a-z]*\*?\}|\\[\\{}$]|[{}]|(?:\n\s*)+|@@\d+@@)/i;
+
+      CODESPAN = /(^|[^\\])(`+)([^\n]*?[^`\n])\2(?!`)/gm;
+
+      function MathJaxProcessor(inlineMark, displayMark) {
+        this.inlineMark = inlineMark || "$";
+        this.displayMark = displayMark || "$$";
+        this.math = null;
+        this.blocks = null;
+      }
+
+      MathJaxProcessor.prototype.processMath = function(start, last, preProcess) {
+        var block, i, _i, _ref;
+        block = this.blocks.slice(start, last + 1).join("").replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+        if (HUB.Browser.isMSIE) {
+          block = block.replace(/(%[^\n]*)\n/g, "$1<br/>\n");
+        }
+        for (i = _i = _ref = start + 1; _ref <= last ? _i <= last : _i >= last; i = _ref <= last ? ++_i : --_i) {
+          this.blocks[i] = "";
+        }
+        this.blocks[start] = "@@" + this.math.length + "@@";
+        if (preProcess) {
+          block = preProcess(block);
+        }
+        return this.math.push(block);
+      };
+
+      MathJaxProcessor.prototype.removeMath = function(text) {
+        var block, braces, current, deTilde, end, hasCodeSpans, last, start, _i, _ref;
+        text = text || "";
+        this.math = [];
+        start = end = last = null;
+        braces = 0;
+        hasCodeSpans = /`/.test(text);
+        if (hasCodeSpans) {
+          text = text.replace(/~/g, "~T").replace(CODESPAN, function($0) {
+            return $0.replace(/\$/g, "~D");
+          });
+          deTilde = function(text) {
+            return text.replace(/~([TD])/g, function($0, $1) {
+              return {
+                T: "~",
+                D: "$"
+              }[$1];
+            });
+          };
+        } else {
+          deTilde = function(text) {
+            return text;
+          };
+        }
+        this.blocks = _split(text.replace(/\r\n?/g, "\n"), MATHSPLIT);
+        for (current = _i = 1, _ref = this.blocks.length; _i < _ref; current = _i += 2) {
+          block = this.blocks[current];
+          if (block.charAt(0) === "@") {
+            this.blocks[current] = "@@" + this.math.length + "@@";
+            this.math.push(block);
+          } else if (start) {
+            if (block === end) {
+              if (braces) {
+                last = current;
+              } else {
+                this.processMath(start, current, deTilde);
+                start = end = last = null;
+              }
+            } else if (block.match(/\n.*\n/)) {
+              if (last) {
+                current = last;
+                this.processMath(start, current, deTilde);
+              }
+              start = end = last = null;
+              braces = 0;
+            } else if (block === "{") {
+              ++braces;
+            } else if (block === "}" && braces) {
+              --braces;
+            }
+          } else {
+            if (block === this.inlineMark || block === this.displayMark) {
+              start = current;
+              end = block;
+              braces = 0;
+            } else if (block.substr(1, 5) === "begin") {
+              start = current;
+              end = "\\end" + block.substr(6);
+              braces = 0;
+            }
+          }
+        }
+        if (last) {
+          this.processMath(start, last, deTilde);
+          start = end = last = null;
+        }
+        return deTilde(this.blocks.join(""));
+      };
+
+      MathJaxProcessor.removeMathWrapper = function(_this) {
+        return function(text) {
+          return _this.removeMath(text);
+        };
+      };
+
+      MathJaxProcessor.prototype.replaceMath = function(text) {
+        var _this = this;
+        text = text.replace(/@@(\d+)@@/g, function($0, $1) {
+          return _this.math[$1];
+        });
+        this.math = null;
+        return text;
+      };
+
+      MathJaxProcessor.replaceMathWrapper = function(_this) {
+        return function(text) {
+          return _this.replaceMath(text);
+        };
+      };
+
+      return MathJaxProcessor;
+
+    })();
+    if (typeof Markdown !== "undefined" && Markdown !== null) {
+      Markdown.getMathCompatibleConverter = function(postProcessor) {
+        var converter, processor;
+        postProcessor || (postProcessor = (function(text) {
+          return text;
+        }));
+        converter = Markdown.getSanitizingConverter();
+        processor = new MathJaxProcessor();
+        converter.hooks.chain("preConversion", MathJaxProcessor.removeMathWrapper(processor));
+        converter.hooks.chain("postConversion", function(text) {
+          return postProcessor(MathJaxProcessor.replaceMathWrapper(processor)(text));
+        });
+        return converter;
+      };
+      return Markdown.makeWmdEditor = function(elem, appended_id, imageUploadUrl, postProcessor) {
+        var $elem, $wmdPanel, $wmdPreviewContainer, ajaxFileUpload, converter, delayRenderer, editor, imageUploadHandler, initialText, wmdInputId, _append;
+        $elem = $(elem);
+        if (!$elem.length) {
+          console.log("warning: elem for makeWmdEditor doesn't exist");
+          return;
+        }
+        if (!$elem.find(".wmd-panel").length) {
+          initialText = $elem.html();
+          $elem.empty();
+          _append = appended_id || "";
+          wmdInputId = "wmd-input" + _append;
+          $wmdPreviewContainer = $("<div>").addClass("wmd-preview-container").append($("<div>").addClass("wmd-preview-label").text(gettext("Preview"))).append($("<div>").attr("id", "wmd-preview" + _append).addClass("wmd-panel wmd-preview"));
+          $wmdPanel = $("<div>").addClass("wmd-panel").append($("<div>").attr("id", "wmd-button-bar" + _append)).append($("<label>").addClass("sr").attr("for", wmdInputId).text(gettext("Post body"))).append($("<textarea>").addClass("wmd-input").attr("id", wmdInputId).html(initialText)).append($wmdPreviewContainer);
+          $elem.append($wmdPanel);
+        }
+        converter = Markdown.getMathCompatibleConverter(postProcessor);
+        ajaxFileUpload = function(imageUploadUrl, input, startUploadHandler) {
+          $("#loading").ajaxStart(function() {
+            return $(this).show();
+          }).ajaxComplete(function() {
+            return $(this).hide();
+          });
+          $("#upload").ajaxStart(function() {
+            return $(this).hide();
+          }).ajaxComplete(function() {
+            return $(this).show();
+          });
+          return $.ajaxFileUpload({
+            url: imageUploadUrl,
+            secureuri: false,
+            fileElementId: 'file-upload',
+            dataType: 'json',
+            success: function(data, status) {
+              var error, fileURL;
+              fileURL = data['result']['file_url'];
+              error = data['result']['error'];
+              if (error !== '') {
+                alert(error);
+                if (startUploadHandler) {
+                  $('#file-upload').unbind('change').change(startUploadHandler);
+                }
+                return console.log(error);
+              } else {
+                return $(input).attr('value', fileURL);
+              }
+            },
+            error: function(data, status, e) {
+              alert(e);
+              if (startUploadHandler) {
+                return $('#file-upload').unbind('change').change(startUploadHandler);
+              }
+            }
+          });
+        };
+        imageUploadHandler = function(elem, input) {
+          return ajaxFileUpload(imageUploadUrl, input, imageUploadHandler);
+        };
+        editor = new Markdown.Editor(converter, appended_id, null, imageUploadHandler);
+        delayRenderer = new MathJaxDelayRenderer();
+        editor.hooks.chain("onPreviewPush", function(text, previewSet) {
+          return delayRenderer.render({
+            text: text,
+            previewSetter: previewSet
+          });
+        });
+        editor.run();
+        return editor;
+      };
+    }
+  });
+
+}).call(this);

common/static/xblock/discussion/js/vendor/i18n.js

+window.gettext = function(s){return s;};
+window.ngettext = function(singular, plural, num){ return num == 1 ? singular : plural }
+
+function interpolate(fmt, obj, named) {
+    if (named) {
+        return fmt.replace(/%\(\w+\)s/g, function(match){return String(obj[match.slice(2,-2)])});
+    } else {
+        return fmt.replace(/%s/g, function(match){return String(obj.shift())});
+    }
+}

common/static/xblock/discussion/js/vendor/mathjax_delay_renderer.js

+// Generated by CoffeeScript 1.6.1
+(function() {
+  var getTime;
+
+  getTime = function() {
+    return new Date().getTime();
+  };
+
+  this.MathJaxDelayRenderer = (function() {
+    var bufferId, numBuffers;
+
+    MathJaxDelayRenderer.prototype.maxDelay = 3000;
+
+    MathJaxDelayRenderer.prototype.mathjaxRunning = false;
+
+    MathJaxDelayRenderer.prototype.elapsedTime = 0;
+
+    MathJaxDelayRenderer.prototype.mathjaxDelay = 0;
+
+    MathJaxDelayRenderer.prototype.mathjaxTimeout = void 0;
+
+    bufferId = "mathjax_delay_buffer";
+
+    numBuffers = 0;
+
+    function MathJaxDelayRenderer(params) {
+      params = params || {};
+      this.maxDelay = params["maxDelay"] || this.maxDelay;
+      this.bufferId = params["bufferId"] || (bufferId + numBuffers);
+      numBuffers += 1;
+      this.$buffer = $("<div>").attr("id", this.bufferId).css("display", "none").appendTo($("body"));
+    }
+
+    MathJaxDelayRenderer.prototype.render = function(params) {
+      var delay, elem, preprocessor, previewSetter, renderer, text,
+        _this = this;
+      elem = params["element"];
+      previewSetter = params["previewSetter"];
+      text = params["text"];
+      if (text == null) {
+        text = $(elem).html();
+      }
+      preprocessor = params["preprocessor"];
+      if (params["delay"] === false) {
+        if (preprocessor != null) {
+          text = preprocessor(text);
+        }
+        $(elem).html(text);
+        return MathJax.Hub.Queue(["Typeset", MathJax.Hub, $(elem).attr("id")]);
+      } else {
+        if (this.mathjaxTimeout) {
+          window.clearTimeout(this.mathjaxTimeout);
+          this.mathjaxTimeout = void 0;
+        }
+        delay = Math.min(this.elapsedTime + this.mathjaxDelay, this.maxDelay);
+        renderer = function() {
+          var curTime, prevTime;
+          if (_this.mathjaxRunning) {
+            return;
+          }
+          prevTime = getTime();
+          if (preprocessor != null) {
+            text = preprocessor(text);
+          }
+          _this.$buffer.html(text);
+          curTime = getTime();
+          _this.elapsedTime = curTime - prevTime;
+          if (MathJax) {
+            prevTime = getTime();
+            _this.mathjaxRunning = true;
+            return MathJax.Hub.Queue(["Typeset", MathJax.Hub, _this.$buffer.attr("id")], function() {
+              _this.mathjaxRunning = false;
+              curTime = getTime();
+              _this.mathjaxDelay = curTime - prevTime;
+              if (previewSetter) {
+                return previewSetter($(_this.$buffer).html());
+              } else {
+                return $(elem).html($(_this.$buffer).html());
+              }
+            });
+          } else {
+            return _this.mathjaxDelay = 0;
+          }
+        };
+        return this.mathjaxTimeout = window.setTimeout(renderer, delay);
+      }
+    };
+
+    return MathJaxDelayRenderer;
+
+  })();
+
+}).call(this);

common/static/xblock/discussion/js/vendor/split.js

+/*!
+ * Cross-Browser Split 1.1.1
+ * Copyright 2007-2012 Steven Levithan <stevenlevithan.com>
+ * Available under the MIT License
+ * ECMAScript compliant, uniform cross-browser split method
+ */
+
+/**
+ * Splits a string into an array of strings using a regex or string separator. Matches of the
+ * separator are not included in the result array. However, if `separator` is a regex that contains
+ * capturing groups, backreferences are spliced into the result each time `separator` is matched.
+ * Fixes browser bugs compared to the native `String.prototype.split` and can be used reliably
+ * cross-browser.
+ * @param {String} str String to split.
+ * @param {RegExp|String} separator Regex or string to use for separating the string.
+ * @param {Number} [limit] Maximum number of items to include in the result array.
+ * @returns {Array} Array of substrings.
+ * @example
+ *
+ * // Basic use
+ * split('a b c d', ' ');
+ * // -> ['a', 'b', 'c', 'd']
+ *
+ * // With limit
+ * split('a b c d', ' ', 2);
+ * // -> ['a', 'b']
+ *
+ * // Backreferences in result array
+ * split('..word1 word2..', /([a-z]+)(\d+)/i);
+ * // -> ['..', 'word', '1', ' ', 'word', '2', '..']
+ */
+
+var _split; // instead of split for a less common name; avoid conflict
+
+// Avoid running twice; that would break the `nativeSplit` reference
+_split = _split || function (undef) {
+
+    var nativeSplit = String.prototype.split,
+        compliantExecNpcg = /()??/.exec("")[1] === undef, // NPCG: nonparticipating capturing group
+        self;
+
+    self = function (str, separator, limit) {
+        // If `separator` is not a regex, use `nativeSplit`
+        if (Object.prototype.toString.call(separator) !== "[object RegExp]") {
+            return nativeSplit.call(str, separator, limit);
+        }
+        var output = [],
+            flags = (separator.ignoreCase ? "i" : "") +
+                    (separator.multiline  ? "m" : "") +
+                    (separator.extended   ? "x" : "") + // Proposed for ES6
+                    (separator.sticky     ? "y" : ""), // Firefox 3+
+            lastLastIndex = 0,
+            // Make `global` and avoid `lastIndex` issues by working with a copy
+            separator = new RegExp(separator.source, flags + "g"),
+            separator2, match, lastIndex, lastLength;
+        str += ""; // Type-convert
+        if (!compliantExecNpcg) {
+            // Doesn't need flags gy, but they don't hurt
+            separator2 = new RegExp("^" + separator.source + "$(?!\\s)", flags);
+        }
+        /* Values for `limit`, per the spec:
+         * If undefined: 4294967295 // Math.pow(2, 32) - 1
+         * If 0, Infinity, or NaN: 0
+         * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
+         * If negative number: 4294967296 - Math.floor(Math.abs(limit))
+         * If other: Type-convert, then use the above rules
+         */
+        limit = limit === undef ?
+            -1 >>> 0 : // Math.pow(2, 32) - 1
+            limit >>> 0; // ToUint32(limit)
+        while (match = separator.exec(str)) {
+            // `separator.lastIndex` is not reliable cross-browser
+            lastIndex = match.index + match[0].length;
+            if (lastIndex > lastLastIndex) {
+                output.push(str.slice(lastLastIndex, match.index));
+                // Fix browsers whose `exec` methods don't consistently return `undefined` for
+                // nonparticipating capturing groups
+                if (!compliantExecNpcg && match.length > 1) {
+                    match[0].replace(separator2, function () {
+                        for (var i = 1; i < arguments.length - 2; i++) {
+                            if (arguments[i] === undef) {
+                                match[i] = undef;
+                            }
+                        }
+                    });
+                }
+                if (match.length > 1 && match.index < str.length) {
+                    Array.prototype.push.apply(output, match.slice(1));
+                }
+                lastLength = match[0].length;
+                lastLastIndex = lastIndex;
+                if (output.length >= limit) {
+                    break;
+                }
+            }
+            if (separator.lastIndex === match.index) {
+                separator.lastIndex++; // Avoid an infinite loop
+            }
+        }
+        if (lastLastIndex === str.length) {
+            if (lastLength || !separator.test("")) {
+                output.push("");
+            }
+        } else {
+            output.push(str.slice(lastLastIndex));
+        }
+        return output.length > limit ? output.slice(0, limit) : output;
+    };
+
+    // For convenience
+    String.prototype.split = function (separator, limit) {
+        return self(this, separator, limit);
+    };
+
+    return self;
+
+}();
+

common/templates/discussion/_discussion_course.html

+<%! from django.utils.translation import ugettext as _ %>
+
+<div class="discussion-course">
+
+  % if enable_new_post_btn and has_permission_to_create_thread:
+  <div class="discussion-course-new right">
+    <a href="#" class="new-post-btn" role="button"><span class="icon icon-edit new-post-icon"></span>${_("New Post")}</a>
+  </div>
+
+  <div style="display: block; clear: both; height: 1px;"></div>
+  % endif
+
+  <section class="discussion container" id="discussion-container"
+           data-roles="${roles}"
+           data-course-id="${course_id}"
+           data-user-info="${user_info}"
+           data-threads="${threads}"
+           data-thread-pages="${thread_pages}"
+           data-content-info="${annotated_content_info}"
+           data-sort-preference="${sort_preference}"
+           data-flag-moderator="${flag_moderator}"
+           data-user-cohort-id="${user_cohort}"
+           data-course-settings="${course_settings}">
+    <div class="discussion-body">
+      <div class="forum-nav"></div>
+      <div class="discussion-column">
+        <article class="new-post-article" style="display: none"></article>
+        <div class="forum-content"></div>
+      </div>
+    </div>
+  </section>
+
+  <%include file="_underscore_templates.html" />
+  <%include file="_thread_list_template.html" />
+
+</div>

common/templates/discussion/_discussion_course_studio.html

+<%! from django.utils.translation import ugettext as _ %>
+
+<div class="discussion-module">
+    <p>
+        <span class="discussion-preview">
+            <span class="icon icon-comment"/>
+            ${_("To view live course discussions, click Preview or View Live in Unit Settings.")}
+        </span>
+    </p>
+</div>

lms/templates/discussion/_underscore_templates.html → common/templates/discussion/_underscore_templates.html

+<<<<<<< HEAD:lms/templates/discussion/_underscore_templates.html
 <%namespace name='static' file='../static_content.html'/>
 <%!
 from django.utils.translation import ugettext as _
@@ -18,12 +19,14 @@ from django_comment_client.permissions import has_permission
             </div>
             <div class="post-extended-content">
                 <div class="response-count"/>
+                % if course is UNDEFINED or has_permission(user, 'create_comment', course.id):
                 <div class="add-response">
                     <button class="button add-response-btn">
                         <i class="icon fa fa-reply"></i>
                         <span class="add-response-btn-text">${_('Add A Response')}</span>
                     </button>
                 </div>
+                % endif
                 <ol class="responses js-response-list"/>
                 <div class="response-pagination"/>
                 <div class="post-status-closed bottom-post-status" style="display: none">
@@ -400,7 +403,7 @@ from django_comment_client.permissions import has_permission
                     ${'<% }); %>'}
                  </select>
             </label><div class="field-help" id="field_help_visible_to">
-                ${_("Discussion admins, moderators, and TAs can make their posts visible to all students or specify a single cohort.")}
+                ${_("Discussion admins, moderators, and TAs can make their posts visible to all students or specify a single cohort group.")}
             </div>
         </div>
         ${'<% } %>'}

common/templates/discussion/discussion_inline_edit.html

+<%! from django.utils.translation import ugettext as _ %>
+
+<div id="discussion-edit" class="wrapper-comp-settings is-active editor-with-buttons" id="settings-tab">
+  <ul class="list-input settings-list">
+      <li class="field comp-setting-entry is-set">
+          <div class="wrapper-comp-setting">
+            <label class="label setting-label" for="display-name">Display Name</label>
+            <input class="input setting-input" id="display-name" value="${display_name}" type="text">
+          </div>
+          <span class="tip setting-help">Display Name</span>
+      </li>
+      <li class="field comp-setting-entry is-set">
+          <div class="wrapper-comp-setting">
+            <label class="label setting-label" for="discussion-category">Discussion Category</label>
+            <input class="input setting-input" id="discussion-category" value="${discussion_category}" type="text">
+          </div>
+          <span class="tip setting-help">Discussion Category</span>
+      </li>
+      <li class="field comp-setting-entry is-set">
+          <div class="wrapper-comp-setting">
+            <label class="label setting-label" for="discussion-target">Discussion Target</label>
+            <input class="input setting-input" id="discussion-target" value="${discussion_target}" type="text">
+          </div>
+          <span class="tip setting-help">Discussion Target</span>
+      </li>
+  </ul>
+  <div class="xblock-actions">
+    <span class="xblock-editor-error-message"></span>
+    <ul>
+      <li class="action-item">
+        <a href="#" class="button action-primary save-button">${_('Save')}</a>
+      </li>
+
+      <li class="action-item">
+        <a href="#" class="button cancel-button">${_('Cancel')}</a>
+      </li>
+    </ul>
+  </div>
+</div>

lms/templates/discussion/index.html → common/templates/discussion/index.html

+<%! from django.utils.translation import ugettext as _ %>
+<%! import django_comment_client.helpers as helpers %>
+<%! from django.template.defaultfilters import escapejs %>
+<%! from django.core.urlresolvers import reverse %>
+
 <%inherit file="../main.html" />
 <%namespace name='static' file='../static_content.html'/>
-<%!
-from django.utils.translation import ugettext as _
-import django_comment_client.helpers as helpers
-from django.template.defaultfilters import escapejs
-from django.core.urlresolvers import reverse
-%>
-
 <%block name="bodyclass">discussion</%block>
 <%block name="pagetitle">${_("Discussion - {course_number}").format(course_number=course.display_number_with_default) | h}</%block>
 <%block name="nav_skip">#discussion-container</%block>
@@ -14,10 +12,12 @@ from django.core.urlresolvers import reverse
 <%block name="headextra">
 <%static:css group='style-course-vendor'/>
 <%static:css group='style-course'/>
+
+<%include file="_js_head_dependencies.html" />
 </%block>
 
 <%block name="js_extra">
-<%include file="/discussion/_js_body_dependencies.html" />
+<%include file="_js_body_dependencies.html" />
 <%static:js group='discussion'/>
 </%block>
 
@@ -35,9 +35,9 @@ from django.core.urlresolvers import reverse
          data-user-cohort-id="${user_cohort}"
          data-course-settings="${course_settings}">
     <div class="discussion-body">
-        <div class="forum-nav" role="complementary" aria-label="${_("Discussion thread list")}"></div>
-        <div class="discussion-column" role="main" aria-label="Discussion" id="discussion-column">
-          <article class="new-post-article" style="display: none" tabindex="-1" aria-label="${_("New topic form")}"></article>
+        <div class="forum-nav"></div>
+        <div class="discussion-column">
+          <article class="new-post-article" style="display: none"></article>
           <div class="forum-content"></div>
         </div>
     </div>
@@ -45,5 +45,3 @@ from django.core.urlresolvers import reverse
 
 <%include file="_underscore_templates.html" />
 <%include file="_thread_list_template.html" />
-<%include file="/discussion/_discussion_course.html" />
-

lms/templates/discussion/user_profile.html → common/templates/discussion/user_profile.html

@@ -11,10 +11,12 @@ from django.template.defaultfilters import escapejs
 <%block name="headextra">
 <%static:css group='style-course-vendor'/>
 <%static:css group='style-course'/>
+
+<%include file="_js_head_dependencies.html" />
 </%block>
 
 <%block name="js_extra">
-<%include file="/discussion/_js_body_dependencies.html" />
+<%include file="_js_body_dependencies.html" />
 <%static:js group='discussion'/>
 </%block>
 
@@ -26,7 +28,7 @@ from django.template.defaultfilters import escapejs
       <nav aria-label="${_('User Profile')}">
 
         <article class="sidebar-module discussion-sidebar">
-          <%include file="/discussion/_user_profile.html" />
+          <%include file="_user_profile.html" />
         </article>
 
       </nav>
@@ -36,4 +38,4 @@ from django.template.defaultfilters import escapejs
   </div>
 </section>
 
-<%include file="/discussion/_underscore_templates.html" />
+<%include file="_underscore_templates.html" />

common/templates/js/discussion/thread-show.underscore

+<div class="discussion-post">
+    <header>
+        <div class="group-visibility-label">
+            <% if (obj.group_name) { %>
+                <%-
+                interpolate(
+                    gettext('This post is visible only to %(group_name)s.'),
+                    {group_name: obj.group_name},
+                    true
+                )
+                %>
+            <% } else { %>
+                <%- gettext('This post is visible to everyone.') %>
+            <% } %>
+        </div>
+
+        <div class="post-header-content">
+            <h1><%- title %></h1>
+            <p class="posted-details">
+            <%
+            var timeAgoHtml = interpolate(
+                '<span class="timeago" title="%(created_at)s">%(created_at)s</span>',
+                {created_at: created_at},
+                true
+            );
+            %>
+            <%=
+            interpolate(
+                // Translators: post_type describes the kind of post this is (e.g. "question" or "discussion");
+                // time_ago is how much time has passed since the post was created (e.g. "4 hours ago")
+                _.escape(gettext('%(post_type)s posted %(time_ago)s by %(author)s')),
+                {post_type: thread_type, time_ago: timeAgoHtml, author: author_display},
+                true
+            )
+            %>
+            </p>
+            <div class="post-labels">
+                <span class="post-label-pinned"><i class="icon icon-pushpin"></i><%- gettext("Pinned") %></span>
+                <span class="post-label-reported"><i class="icon icon-flag"></i><%- gettext("Reported") %></span>
+                <span class="post-label-closed"><i class="icon icon-lock"></i><%- gettext("Closed") %></span>
+            </div>
+        </div>
+        <div class="post-header-actions post-extended-content">
+            <%=
+            _.template(
+                $('#forum-actions').html(),
+                {
+                    contentId: cid,
+                    contentType: 'post',
+                    primaryActions: ['vote', 'follow'],
+                    secondaryActions: ['pin', 'edit', 'delete', 'report', 'close']
+                }
+            )
+            %>
+        </div>
+    </header>
+
+    <div class="post-body"><%- body %></div>
+
+    <% if (mode == "tab" && obj.courseware_url) { %>
+        <%
+        var courseware_title_linked = interpolate(
+            '<a href="%(courseware_url)s">%(courseware_title)s</a>',
+            {courseware_url: courseware_url, courseware_title: _.escape(courseware_title)},
+            true
+        );
+        %>
+        <div class="post-context">
+            <%=
+            interpolate(
+                _.escape(gettext('(this post is about %(courseware_title_linked)s)')),
+                {courseware_title_linked: courseware_title_linked},
+                true
+            )
+            %>
+        </div>
+    <% } %>
+</div>

common/test/acceptance/pages/lms/discussion.py

@@ -381,13 +381,28 @@ class DiscussionTabSingleThreadPage(CoursePage):
 class InlineDiscussionPage(PageObject):
     url = None
 
-    def __init__(self, browser, discussion_id):
+    def __init__(self, browser, discussion_id=None):
         super(InlineDiscussionPage, self).__init__(browser)
+        if not discussion_id is None:
             self._discussion_selector = (
                 "body.courseware .discussion-module[data-discussion-id='{discussion_id}'] ".format(
                     discussion_id=discussion_id
                 )
             )
+            self._discussion_id = discussion_id
+        else:
+            self._discussion_selector = "body.courseware .discussion-module[data-discussion-id] "
+            self._discussion_id = None
+
+    def get_discussion_id(self):
+        """
+        Gets configured discussion_id for the page.
+        Uses discussion_id passed to __init__ if it was not None, otherwise picks it from XBlock element data attribute
+        """
+        if self._discussion_id is not None:
+            return self._discussion_id
+
+        return self.q(css=self._discussion_selector).first.attrs('data-discussion-id')[0]
 
     def _find_within(self, selector):
         """

lms/djangoapps/django_comment_client/helpers.py

@@ -3,11 +3,9 @@ import os
 from django.conf import settings
 from mako.template import Template
 
-from discussion_app.views import get_template_dir as discussion_get_template_dir
-
 
 def include_mustache_templates():
-    mustache_dir = discussion_get_template_dir() + '/discussion/mustache'
+    mustache_dir = settings.COMMON_ROOT / 'templates' / 'discussion' / 'mustache'
 
     def is_valid_file_name(file_name):
         return file_name.endswith('.mustache')

lms/envs/common.py

@@ -43,11 +43,6 @@ from xmodule.modulestore.modulestore_settings import update_module_store_setting
 from xmodule.mixin import LicenseMixin
 from lms.djangoapps.lms_xblock.mixin import LmsBlockMixin
 
-from discussion_app.views import (
-    get_js_urls as discussion_get_js_urls,
-    get_css_urls as discussion_get_css_urls
-)
-
 ################################### FEATURES ###################################
 # The display name of the platform to be used in templates/emails/etc.
 PLATFORM_NAME = "Your Platform Name Here"
@@ -1262,14 +1257,14 @@ main_vendor_js = base_vendor_js + [
     'js/vendor/swfobject/swfobject.js',
     'js/vendor/jquery.ba-bbq.min.js',
     'js/vendor/URI.min.js',
+    'js/vendor/underscore-min.js',
+    'js/vendor/backbone-min.js',
 ]
 
-dashboard_js = (
-    sorted(rooted_glob(PROJECT_ROOT / 'static', 'js/dashboard/**/*.js'))
-)
 dashboard_search_js = ['js/search/dashboard/main.js']
 rwd_header_js = sorted(rooted_glob(PROJECT_ROOT / 'static', 'js/utils/rwd_header.js'))
-discussion_js = discussion_get_js_urls()
+dashboard_js = sorted(rooted_glob(PROJECT_ROOT / 'static', 'js/dashboard/**/*.js'))
+discussion_js = sorted(rooted_glob(COMMON_ROOT / 'static', 'coffee/src/discussion/**/*.js'))
 staff_grading_js = sorted(rooted_glob(PROJECT_ROOT / 'static', 'coffee/src/staff_grading/**/*.js'))
 open_ended_js = sorted(rooted_glob(PROJECT_ROOT / 'static', 'coffee/src/open_ended/**/*.js'))
 notes_js = sorted(rooted_glob(PROJECT_ROOT / 'static', 'coffee/src/notes/**/*.js'))
@@ -1411,10 +1406,6 @@ PIPELINE_CSS = {
         ],
         'output_filename': 'css/lms-main-rtl.css',
     },
-    'style-discussion-app': {
-        'source_filenames': discussion_get_css_urls(),
-        'output_filename': 'css/lms-style-discussion-app.css',
-    },
     'style-course-vendor': {
         'source_filenames': [
             'js/vendor/CodeMirror/codemirror.css',
@@ -1865,7 +1856,6 @@ INSTALLED_APPS = (
     'django_comment_common',
     'discussion_api',
     'notes',
-    'discussion_app',
 
     'edxnotes',
 

lms/static/sass/discussion/_discussion.scss

 // forums - main app styling
 // ====================
-body.discussion, .discussion-course {
+body.discussion, .discussion-course, div.discussion-body {
 
   // new post creation
   .new-post-form-errors {

lms/static/sass/discussion/elements/_labels.scss

 // discussion - elements - labels
 // ====================
 
-body.discussion, .discussion-module {
+body.discussion, .discussion-module, .discussion-body {
   .post-label-pinned {
     @include forum-post-label($forum-color-pinned);
   }

lms/templates/discussion/_blank_slate.html

-<%! from django.utils.translation import ugettext as _ %>
-<div class="blank-state">
-  % if performed_search:
-    ${_("Sorry! We can't find anything matching your search. Please try another search.")}
-  % else:
-    ${_("There are no posts here yet. Be the first one to post!")}
-  % endif
-</div>

lms/templates/discussion/_js_data.html

-<%! from django.template.defaultfilters import escapejs %>
-
-<script type="text/javascript">
-  var $$course_id = "${course_id | escapejs}";
-  if (typeof $$annotated_content_info === undefined) {
-    var $$annotated_content_info = {};
-  }
-  $$annotated_content_info = $.extend($$annotated_content_info, JSON.parse("${annotated_content_info | escapejs}"));
-  if (typeof $$discussion_data === undefined) {
-    var $$discussion_data = {};
-  }
-  $$discussion_data = $.extend($$discussion_data, JSON.parse("${discussion_data | escapejs}"));
-</script>

lms/templates/discussion/_recent_active_posts.html

-<%!
-from django.utils.translation import ugettext as _
-import django_comment_client.helpers as helpers
-%>
-
-% if recent_active_threads:
-  <article class="discussion-sidebar-following sidebar-module">
-    <header>
-      <h4>${_("Following")}</h4>
-      <!--<a href="#" class="sidebar-view-all">view all &rsaquo;</a>-->
-    </header>
-    <ol class="discussion-sidebar-following-list">
-      % for thread in recent_active_threads:
-        <li><a href="${helpers.permalink(thread) | h}"><span class="sidebar-following-name">${thread['title'] | h}</span> <span class="sidebar-vote-count">${thread['votes']['point'] | h}</span></a></li>
-      % endfor
-    <ol>
-  </article>
-% endif

lms/templates/discussion/_search_bar.html

-<%!
-from django.utils.translation import ugettext as _
-from urllib import urlencode
-
-def merge(dic1, dic2):
-  return dict(dic1.items() + dic2.items())
-
-def base_url_for_search():
-  return base_url + '?' + urlencode(merge(query_params, {'page': 1}))
-%>
-
-<form action="${base_url_for_search()}" method="get" class="discussion-search-form">
-  <input class="search-input" type="text" value="${text | h}" id="keywords" autocomplete="off"/>
-  <div class="discussion-link discussion-search-link" href="javascript:void(0)">${_("Search posts")}</div>
-</form>

lms/templates/main.html

@@ -66,7 +66,6 @@ from branding import api as branding_api
   <%static:css group='style-app'/>
   <%static:css group='style-app-extend1'/>
   <%static:css group='style-app-extend2'/>
-  <%static:css group='style-discussion-app'/>
 
   % if disable_courseware_js:
     <%static:js group='base_vendor'/>

lms/templates/main_django.html

@@ -14,7 +14,6 @@
   {% compressed_css 'style-main' %}
   {% compressed_css 'style-course-vendor' %}
   {% compressed_css 'style-course' %}
-  {% compressed_css 'style-discussion-app' %}
 
   {% block main_vendor_js %}
   {% compressed_js 'main_vendor' %}

requirements/edx/local.txt

@@ -8,3 +8,6 @@
 -e common/lib/sandbox-packages
 -e common/lib/symmath
 -e common/lib/xmodule
+
+# XBlocks
+-e common/lib/xblock/discussion