Do not compile if Markdown view is invisible

src/iridium-window.c

@@ -40,6 +40,7 @@ struct _IridiumWindow
   GtkListBox        *note_list;
   GtkWidget         *title_entry;
   GtkWidget         *source_view;
+  GtkTextBuffer     *source_buffer;
   GtkWidget         *main_pane;
   GtkSearchBar      *search_bar;
   GtkSearchEntry    *search_entry;
@@ -47,6 +48,7 @@ struct _IridiumWindow
   WebKitWebView     *html_view;
   GBinding          *title_binding;
   GBinding          *content_binding;
+  guint              compile_handler;
 
   IridiumMarkdown       *markdown;
   IridiumStandardFile   *client;
@@ -89,9 +91,9 @@ compile_markdown (IridiumWindow *self,
   GtkTextIter end;
   gchar *text;
 
-  gtk_text_buffer_get_start_iter (buffer, &start);
-  gtk_text_buffer_get_end_iter (buffer, &end);
-  text = gtk_text_buffer_get_slice (buffer, &start, &end, FALSE);
+  gtk_text_buffer_get_start_iter (self->source_buffer, &start);
+  gtk_text_buffer_get_end_iter (self->source_buffer, &end);
+  text = gtk_text_buffer_get_slice (self->source_buffer, &start, &end, FALSE);
   iridium_markdown_compile_async (self->markdown, text, G_PRIORITY_DEFAULT, NULL,
       on_markdown_compiled, self);
   g_free (text);
@@ -108,7 +110,6 @@ static void
 on_note_selected (IridiumWindow *self, IridiumNoteRow *row, gpointer user_data)
 {
   IridiumNote *note;
-  GtkTextBuffer *buffer;
   GBindingFlags flags;
 
   if (self->title_binding != NULL)
@@ -122,9 +123,13 @@ on_note_selected (IridiumWindow *self, IridiumNoteRow *row, gpointer user_data)
 
   note = iridium_note_row_get_note (row);
   flags = G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE;
-  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (self->source_view));
   self->title_binding = g_object_bind_property (note, "title", self->title_entry, "text", flags);
-  self->content_binding = g_object_bind_property (note, "content", buffer, "text", flags);
+  self->content_binding = g_object_bind_property (note, "content", self->source_buffer, "text", flags);
+
+  if (self->compile_handler > 0) {
+    g_signal_handler_disconnect (self->source_buffer, self->compile_handler);
+    self->compile_handler = 0;
+  }
 }
 
 static void
@@ -160,12 +165,12 @@ preview_toggled (GSimpleAction *action,
   gtk_widget_set_visible (GTK_WIDGET (self->html_view), visible);
 
   if (visible) {
-    GtkTextBuffer *buffer;
-
-    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (self->source_view));
-    compile_markdown (self, buffer);
-    g_signal_connect (buffer, "changed", G_CALLBACK (on_text_changed), self);
-    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (self->source_view));
+    compile_markdown (self, self->source_buffer);
+    self->compile_handler = g_signal_connect (self->source_buffer, "changed", G_CALLBACK (on_text_changed), self);
+  }
+  else if (self->compile_handler > 0) {
+    g_signal_handler_disconnect (self->source_buffer, self->compile_handler);
+    self->compile_handler = 0;
   }
 
   g_variant_unref (state);
@@ -400,6 +405,8 @@ iridium_window_init (IridiumWindow *self)
   self->content_binding = NULL;
   self->markdown = iridium_markdown_new ();
   self->client = iridium_standard_file_new ();
+  self->compile_handler = 0;
+  self->source_buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (self->source_view));
 
   style_data = g_resources_lookup_data ("/net/bloerg/Iridium/iridium-theme.css", 
     G_RESOURCE_LOOKUP_FLAGS_NONE, &error);