Added desc method to filesystems that display debugging information regarding file / dir location

fs/browsewin.py

@@ -11,7 +11,7 @@ class BrowseFrame(wx.Frame):
 
     def __init__(self, fs):
 
-        wx.Frame.__init__(self, None)
+        wx.Frame.__init__(self, None, size=(1000, 600))
 
         self.fs = fs
         self.SetTitle("FS Browser - "+str(fs))
@@ -20,6 +20,7 @@ class BrowseFrame(wx.Frame):
         self.tree.AddColumn("FS", 300)
         self.tree.AddColumn("Size", 150)
         self.tree.AddColumn("Created", 250)
+        self.tree.AddColumn("Description", 250)
         self.root_id = self.tree.AddRoot('root', data=wx.TreeItemData( {'path':"/", 'expanded':False} ))
 
         rid = self.tree.GetItemData(self.root_id)
@@ -99,6 +100,8 @@ class BrowseFrame(wx.Frame):
                 else:
                     self.tree.SetItemText(new_item, 'unknown', 2)
                     
+            self.tree.SetItemText(new_item, self.fs.desc(new_path), 3)
+
         item_data['expanded'] = True
         self.tree.Expand(item_id)
 

fs/fs.py

@@ -14,6 +14,7 @@ error_msgs = {
     "INVALID_PATH" :    "Path is invalid: %(path)s",
     "NO_DIR" :          "Directory does not exist: %(path)s",
     "NO_FILE" :         "No such file: %(path)s",
+    "NO_RESOURCE" :     "No path to: %(path)s",
     "LISTDIR_FAILED" :  "Unable to get directory listing: %(path)s",
     "DELETE_FAILED" :   "Unable to delete file: %(path)s",
     "NO_SYS_PATH" :     "No mapping to OS filesytem: %(path)s,",
@@ -206,6 +207,20 @@ class FS(object):
                 return NullFile()
             raise
       
+    def desc(self, path):
+        
+        if not self.exists(path):        
+            return "No description available"
+                
+        try:
+            sys_path = self.getsyspath(path)
+        except FSError:
+            return "No description available"
+        
+        if self.isdir(path):
+            return "Dir, maps to %s" % sys_path
+        else:
+            return "File, maps to %s" % sys_path
 
     def open(self, path, mode="r", buffering=-1, **kwargs):
 

fs/memoryfs.py

@@ -175,6 +175,12 @@ class MemoryFS(FS):
 
         raise FSError("NO_SYS_PATH", pathname, msg="This file-system has no syspath")
 
+    def desc(self, path):
+        
+        if self.isdir(path):
+            return "Dir in memory"
+        else:
+            return "File object in memory"
 
     def isdir(self, path):
 

fs/multifs.py

@@ -46,6 +46,16 @@ class MultiFS(FS):
                 return fs
         return None
     
+    def which(self, path):
+        
+        for fs in self:
+            if fs.exists(path):
+                for fs_name, fs_object in self.fs_lookup.iteritems():
+                    if fs is fs_object:
+                        return fs_name, fs
+        return None, None
+    
+
     def getsyspath(self, path):
 
         fs = self._delegate_search(path)
@@ -54,6 +64,19 @@ class MultiFS(FS):
 
         raise FSError("NO_FILE", path)
 
+
+    def desc(self, path):
+        
+        if not self.exists(path):
+            raise FSError("NO_RESOURCE", path)
+        
+        name, fs = self.which(path)
+        if name is None:
+            return ""
+        return "%s, on %s (%s)" % (fs.desc(path), name, fs)
+        
+        
+
     def open(self, path, mode="r", buffering=-1, **kwargs):
 
         for fs in self: