Improve GTK3 Performance

src/fe-gtk/fe-gtk.h

@@ -114,7 +114,7 @@ typedef struct restore_gui
 
 	/* information stored when this tab isn't front-most */
 	GtkListStore *user_model;	/* for filling the GtkTreeView */
-	GHashTable *user_row_refs;
+	GHashTable *user_row_iters; /* User * -> persistent GtkTreeIter * */
 	void *buffer;		/* xtext_Buffer */
 	char *input_text;	/* input text buffer (while not-front tab) */
 	char *topic_text;	/* topic GtkEntry buffer */

src/fe-gtk/maingui.c

@@ -5786,9 +5786,9 @@ void
 fe_session_callback (session *sess)
 {
         gtk_xtext_buffer_free (sess->res->buffer);
+        if (sess->res->user_row_iters)
+                g_hash_table_destroy (sess->res->user_row_iters);
         g_object_unref (G_OBJECT (sess->res->user_model));
-        if (sess->res->user_row_refs)
-                g_hash_table_destroy (sess->res->user_row_refs);
 
         if (sess->res->banlist && sess->res->banlist->window)
                 mg_close_gen (NULL, sess->res->banlist->window);

src/fe-gtk/userlistgui.c

@@ -218,75 +218,49 @@ scroll_to_iter (GtkTreeIter *iter, GtkTreeView *treeview, GtkTreeModel *model)
 static GHashTable *
 userlist_row_map_ensure (session *sess)
 {
-	if (!sess->res->user_row_refs)
-		sess->res->user_row_refs = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) gtk_tree_row_reference_free);
+	if (!sess->res->user_row_iters)
+		sess->res->user_row_iters = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) gtk_tree_iter_free);
 
-	return sess->res->user_row_refs;
+	return sess->res->user_row_iters;
 }
 
 static void
 userlist_row_map_remove (session *sess, struct User *user)
 {
-	if (!sess->res->user_row_refs)
+	if (!sess->res->user_row_iters)
 		return;
 
-	g_hash_table_remove (sess->res->user_row_refs, user);
+	g_hash_table_remove (sess->res->user_row_iters, user);
 }
 
 static void
 userlist_row_map_set (session *sess, GtkTreeModel *model, struct User *user, GtkTreeIter *iter)
 {
-	GtkTreePath *path;
-	GtkTreeRowReference *ref;
-
-	path = gtk_tree_model_get_path (model, iter);
-	if (!path)
+	/* The shared tree view can still show another session's model while a
+	 * tab switch is pending. Never cache an iterator from that model. */
+	if (model != GTK_TREE_MODEL (sess->res->user_model))
 		return;
 
-	ref = gtk_tree_row_reference_new (model, path);
-	gtk_tree_path_free (path);
-	if (!ref)
-		return;
-
-	g_hash_table_replace (userlist_row_map_ensure (sess), user, ref);
+	/* GtkListStore guarantees persistent iterators until their row is
+	 * removed, including across sorting. Unlike row references, these do
+	 * not require every cached position to be updated on each insertion. */
+	g_hash_table_replace (userlist_row_map_ensure (sess), user, gtk_tree_iter_copy (iter));
 }
 
 static gboolean
 userlist_row_map_get_iter (session *sess, GtkTreeModel *model, struct User *user, GtkTreeIter *iter)
 {
-	GtkTreeRowReference *ref;
-	GtkTreePath *path;
-	struct User *row_user;
+	GtkTreeIter *cached;
 
-	if (!sess->res->user_row_refs)
+	if (model != GTK_TREE_MODEL (sess->res->user_model) || !sess->res->user_row_iters)
 		return FALSE;
 
-	ref = g_hash_table_lookup (sess->res->user_row_refs, user);
-	if (!ref)
+	cached = g_hash_table_lookup (sess->res->user_row_iters, user);
+	if (!cached)
 		return FALSE;
 
-	path = gtk_tree_row_reference_get_path (ref);
-	if (!path)
-	{
-		g_hash_table_remove (sess->res->user_row_refs, user);
-		return FALSE;
-	}
-
-	if (!gtk_tree_model_get_iter (model, iter, path))
-	{
-		gtk_tree_path_free (path);
-		g_hash_table_remove (sess->res->user_row_refs, user);
-		return FALSE;
-	}
-	gtk_tree_path_free (path);
-
-	gtk_tree_model_get (model, iter, COL_USER, &row_user, -1);
-	if (row_user != user)
-	{
-		g_hash_table_remove (sess->res->user_row_refs, user);
-		return FALSE;
-	}
-
+	/* Removal and clear invalidate the cache before deleting model rows. */
+	*iter = *cached;
 	return TRUE;
 }
 
@@ -587,7 +561,6 @@ fe_userlist_rehash (session *sess, struct User *user)
 					  GTK_TREE_MODEL(sess->res->user_model), user, &sel);
 	if (!iter)
 		return;
-	userlist_row_map_set (sess, GTK_TREE_MODEL (sess->res->user_model), user, iter);
 
 	if (prefs.hex_away_track && user->away)
 	{
@@ -698,8 +671,8 @@ fe_userlist_insert (session *sess, struct User *newuser, gboolean sel)
 void
 fe_userlist_clear (session *sess)
 {
-	if (sess->res->user_row_refs)
-		g_hash_table_remove_all (sess->res->user_row_refs);
+	if (sess->res->user_row_iters)
+		g_hash_table_remove_all (sess->res->user_row_iters);
 	gtk_list_store_clear (sess->res->user_model);
 }
 

src/fe-gtk/xtext.c

@@ -3130,6 +3130,7 @@ gtk_xtext_class_init (GtkXTextClass * class)
 
 typedef struct chunk_s {
 	GSList *slp;
+	gboolean collect_metadata;
 	int off1, len1, emph;
 	offlen_t meta;
 } chunk_t;
@@ -3142,12 +3143,19 @@ xtext_do_chunk(chunk_t *c)
 	if (c->len1 == 0)
 		return;
 
+	/* Copying, searching and saving only need the stripped text. */
+	if (!c->collect_metadata)
+	{
+		c->len1 = 0;
+		return;
+	}
+
 	meta = g_new (offlen_t, 1);
 	meta->off = c->off1;
 	meta->len = c->len1;
 	meta->emph = c->emph;
 	meta->width = 0;
-	c->slp = g_slist_append (c->slp, meta);
+	c->slp = g_slist_prepend (c->slp, meta);
 
 	c->len1 = 0;
 }
@@ -3170,6 +3178,7 @@ gtk_xtext_strip_color (unsigned char *text, int len, unsigned char *outbuf,
 		new_str = outbuf;
 
 	c.slp = NULL;
+	c.collect_metadata = slpp != NULL;
 	c.off1 = 0;
 	c.len1 = 0;
 	c.emph = 0;
@@ -3240,9 +3249,7 @@ bad_utf8:		/* Normal ending sequence, and give up if bad utf8 */
 		*newlen = i;
 
 	if (slpp)
-		*slpp = c.slp;
-	else
-		g_slist_free_full (c.slp, g_free);
+		*slpp = g_slist_reverse (c.slp);
 
 	return new_str;
 }
@@ -4341,7 +4348,7 @@ gtk_xtext_lines_taken (xtext_buffer *buf, textentry * ent)
 
 	if (win_width >= ent->indent + ent->str_width)
 	{
-		ent->sublines = g_slist_append (ent->sublines, GINT_TO_POINTER (ent->str_len));
+		ent->sublines = g_slist_prepend (ent->sublines, GINT_TO_POINTER (ent->str_len));
 		ent->subline_count = 1;
 		return ent->subline_count;
 	}
@@ -4352,13 +4359,15 @@ gtk_xtext_lines_taken (xtext_buffer *buf, textentry * ent)
 	do
 	{
 		len = find_next_wrap (buf->xtext, ent, str, win_width, indent);
-		ent->sublines = g_slist_append (ent->sublines, GINT_TO_POINTER (str + len - ent->str));
+		ent->sublines = g_slist_prepend (ent->sublines, GINT_TO_POINTER (str + len - ent->str));
+		ent->subline_count++;
 		indent = buf->indent;
 		str += len;
 	}
 	while (str < ent->str + ent->str_len);
 
-	ent->subline_count = g_slist_length (ent->sublines);
+	/* Preserve display order without walking the growing list per wrap. */
+	ent->sublines = g_slist_reverse (ent->sublines);
 	return ent->subline_count;
 }