"Cache" images to avoid loading them all the time

mitterlib/ui/ui_pygtk.py

@@ -98,7 +98,7 @@ class _WorkerThread(threading.Thread, _IdleObject):
 
     def run(self):
         # call the function
-        _log.debug('Thread %s calling %s', self.name, str(self._function))
+        _log.debug('Thread d %s calling %s', self.name, str(self._function))
 
         args = self._args
         kwargs = self._kwargs
@@ -111,7 +111,7 @@ class _WorkerThread(threading.Thread, _IdleObject):
             self.emit("exception", exc)
             return
 
-        _log.debug('Thread %s completed', self.name)
+        _log.debug('Thread id %s completed', self.name)
 
         self.emit("completed", result)
         return
@@ -138,7 +138,7 @@ class _ThreadManager(object):
         # this case, the _WorkerThread object.
         thread_id = widget.name
 
-        _log.debug('Thread %s completed, %d threads in the queue', thread_id,
+        _log.debug('Thread id %s completed, %d threads in the queue', thread_id,
                 len(self._thread_pool))
 
         self._running.remove(thread_id)
@@ -213,8 +213,8 @@ class Interface(object):
         main_window.resize(initial_width, initial_height)
         main_window.move(initial_x, initial_y)
 
-        if self._app_icon:
-            main_window.set_icon_from_file(self._app_icon)
+        if self._images['main']:
+            main_window.set_icon(self._images['main'])
 
         main_window.connect('destroy', self._quit_app)
         main_window.connect('delete-event', self._quit_app)
@@ -511,10 +511,8 @@ class Interface(object):
             'Philip Reynolds',
             'Greg McIntyre',
             '"Alexander"'])
-        if self._app_icon:
-            _log.debug('Icon: %s', self._app_icon)
-            about_window.set_logo(gtk.gdk.pixbuf_new_from_file(
-                self._app_icon))
+        if self._images['main']:
+            about_window.set_logo(self._images['main'])
         about_window.run()
         about_window.hide()
 
@@ -536,7 +534,7 @@ class Interface(object):
             # set the user avatar to the default image, so it won't get queued
             # again. Once downloaded, the _post_download_pic will update the
             # image and force a redraw.
-            self._avatars[pic] = self._default_pixmap
+            self._avatars[pic] = self._images['avatar']
 
         cell.set_property('pixbuf', self._avatars[pic])
 
@@ -803,7 +801,7 @@ class Interface(object):
         self._grid.get_model().clear()
         self._new_message_count = 0
         if self._statusicon:
-            self._statusicon.set_from_file(find_image('mitter.png'))
+            self._statusicon.set_from_pixbuf(self._images['main'])
         return
 
     def _delete_message(self, widget, user_data=None):
@@ -972,7 +970,7 @@ class Interface(object):
         self._new_message_count -= 1
 
         if self._new_message_count == 0 and self._statusicon:
-            self._statusicon.set_from_file(find_image('mitter.png'))
+            self._statusicon.set_from_pixbuf(self._images['main'])
 
         return True
 
@@ -1013,7 +1011,7 @@ class Interface(object):
 
         self._new_message_count += len(results)
         if self._new_message_count > 0 and self._statusicon:
-            self._statusicon.set_from_file(find_image('mitter-new.png'))
+            self._statusicon.set_from_pixbuf(self._images['new-messages'])
 
         return
 
@@ -1031,12 +1029,17 @@ class Interface(object):
         error_win.hide()
         self._update_statusbar('Auto-update disabled')
         if self._statusicon:
-            self._statusicon.set_from_file(find_image('mitter-error.png'))
+            self._statusicon.set_from_pixbuf(self._images['icon-error'])
         return
 
     ### image download function
     def _download_pic(self, url):
         """Download a picture from the web. Can be used in a thread."""
+        # recheck if the image wasn't downloaded by other thread
+        if url in self._avatars:
+            _log.debug('Image %s available already' % (url))
+            return None
+
         request = urllib2.Request(url=url)
         _log.debug('Starting request of %s' % (url))
         response = urllib2.urlopen(request)
@@ -1048,6 +1051,9 @@ class Interface(object):
     ### Results from the picture request
     def _post_download_pic(self, widget, data):
         """Called after the data from the picture is available."""
+        if not data:
+            # image appeared in the queue
+            return
 
         (url, data) = data
 
@@ -1143,20 +1149,23 @@ class Interface(object):
         self._pic_queue = set()
 
         # Load images
-        self._app_icon = find_image('mitter.png')
-        self._app_icon_alert = find_image('mitter-new.png')
-        self._reply_pixbuf = gtk.gdk.pixbuf_new_from_file(
-                find_image('reply.png'))
-        #self._delete_icon = find_image('icon_trash.gif')
-
         unknown_pixbuf = find_image('unknown.png')
         if unknown_pixbuf:
-            self._default_pixmap = gtk.gdk.pixbuf_new_from_file(
+            default_pixmap = gtk.gdk.pixbuf_new_from_file(
                     unknown_pixbuf)
         else:
-            self._default_pixmap = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB,
+            default_pixmap = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB,
                     has_alpha=False, bits_per_sample=8, width=48, height=48)
 
+        self._images = {}
+        self._images['main'] = gtk.gdk.pixbuf_new_from_file(
+                find_image('mitter.png'))
+        self._images['new-messages'] = gtk.gdk.pixbuf_new_from_file(
+                find_image('mitter-new.png'))
+        self._images['icon-error'] = gtk.gdk.pixbuf_new_from_file(
+                find_image('mitter-error.png'))
+        self._images['avatar'] = default_pixmap
+
         # This is the ugly bit for speeding up things and making
         # interthread communication.
         self._delete_iter = None
@@ -1174,7 +1183,7 @@ class Interface(object):
 
         if self._options[self.NAMESPACE]['statusicon']:
             self._statusicon = gtk.StatusIcon()
-            self._statusicon.set_from_file(find_image('mitter.png'))
+            self._statusicon.set_from_pixbuf(self._images['main'])
         else:
             self._statusicon = None
         self._threads = _ThreadManager()