add new cms coffee class for html editing

cms/static/coffee/src/views/module_html_edit.coffee

+class CMS.Views.HTMLModuleEdit extends CMS.Views.ModuleEdit
+	events:
+		"click .component-actions .edit-button": 'clickEditButton'
+		"click .component-actions .delete-button": 'onDelete'
+
+	initialize: ->
+		@onDelete = @options.onDelete
+		super(@options)
+
+	clickEditButton: (event) ->
+		event.preventDefault()
+		@enterEditMode()
+
+	enterEditMode: ->
+		$preview = @$el.find('.xmodule_display')
+		if $preview
+			html = $preview.html()
+
+		@$componentItem = $('<li>').addClass('editing')
+		@$editor = $($('#html-editor').html())
+		# initHTMLEditor is in a separate .js file
+		initHTMLEditor(@$editor, html)
+		@$editor.find('.cancel-button').bind('click', @closeEditor)
+		@$editor.find('.save-button').bind('click', @saveEditor)
+		
+		$componentActions = $($('#component-actions').html())
+		@$componentItem.append(@$editor)
+		@$componentItem.append($componentActions)
+		@$componentItem.hide()
+		@$el.before(@$componentItem)
+		@$componentItem.show()
+
+		# $modalCover is defined in base.js
+		$modalCover.fadeIn(200)
+		$modalCover.bind('click', @closeEditor)
+
+	closeEditor: (event) =>
+		@$componentItem.remove()
+		@$editor.slideUp(150)
+		$modalCover.fadeOut(150)
+		$modalCover.unbind('click', @closeEditor)
+		@$editor.slideUp(150)
+		@$componentItem.removeClass('editing')  
+
+	saveEditor: (event) =>
+		html = getHTMLContent()
+
+		if not @model.id
+			@cloneTemplate(
+				@options.parent,
+				'i4x://edx/templates/html/Empty',
+				html
+			)
+			@closeEditor()
+		else
+			data = 
+				data: html
+
+			@model.save(data).done( =>
+				@$el.find('.xmodule_display').html(html)
+				@$componentItem.remove()
+				@closeEditor()
+			).fail( =>
+     			showToastMessage("There was an error saving your changes. Please try again.", null, 3)
+    		)