Rename all filenames starting with "gossip" by "empathy", change namespace

2007-06-22 Xavier Claessens  <xclaesse@gmail.com>

	* libempathy/*.[ch]:
	* libempathy-gtk/*.[ch]:
	* src/*.[ch]: Rename all filenames starting with "gossip" by "empathy",
	change namespace of all gossip_*() functions to empathy_*().
	Fixes bug #444490 (Mario Danic, Xavier Claessens).


svn path=/trunk/; revision=170

1 files changed, 1341 insertions, 0 deletions

diff --git a/libempathy-gtk/empathy-ui-utils.c b/libempathy-gtk/empathy-ui-utils.c
new file mode 100644
index 000000000..1331f3fb9
--- /dev/null
+++ b/libempathy-gtk/empathy-ui-utils.c
@@ -0,0 +1,1341 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Copyright (C) 2002-2007 Imendio AB
+ * Copyright (C) 2007 Collabora Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ * Authors: Mikael Hallendal <micke@imendio.com>
+ *          Richard Hult <richard@imendio.com>
+ *          Martyn Russell <martyn@imendio.com>
+ *          Xavier Claessens <xclaesse@gmail.com>
+ * 
+ *          Part of this file is copied from GtkSourceView (gtksourceiter.c):
+ *          Paolo Maggi
+ *          Jeroen Zwartepoorte
+ */
+
+#include <string.h>
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <glade/glade.h>
+#include <libgnomevfs/gnome-vfs-utils.h>
+
+#include <libmissioncontrol/mc-profile.h>
+
+#include <libempathy/empathy-debug.h>
+
+#include "empathy-ui-utils.h"
+#include "empathy-images.h"
+
+#define DEBUG_DOMAIN "UiUtils"
+
+struct SizeData {
+	gint     width;
+	gint     height;
+	gboolean preserve_aspect_ratio;
+};
+
+static GladeXML *
+get_glade_file (const gchar *filename,
+		const gchar *root,
+		const gchar *domain,
+		const gchar *first_required_widget,
+		va_list      args)
+{
+	gchar      *path;
+	GladeXML   *gui;
+	const char *name;
+	GtkWidget **widget_ptr;
+
+	path = g_build_filename (DATADIR, "empathy", filename, NULL);
+	gui = glade_xml_new (path, root, domain);
+	g_free (path);
+
+	if (!gui) {
+		g_warning ("Couldn't find necessary glade file '%s'", filename);
+		return NULL;
+	}
+
+	for (name = first_required_widget; name; name = va_arg (args, char *)) {
+		widget_ptr = va_arg (args, void *);
+
+		*widget_ptr = glade_xml_get_widget (gui, name);
+
+		if (!*widget_ptr) {
+			g_warning ("Glade file '%s' is missing widget '%s'.",
+				   filename, name);
+			continue;
+		}
+	}
+
+	return gui;
+}
+
+void
+empathy_glade_get_file_simple (const gchar *filename,
+			      const gchar *root,
+			      const gchar *domain,
+			      const gchar *first_required_widget, ...)
+{
+	va_list   args;
+	GladeXML *gui;
+
+	va_start (args, first_required_widget);
+
+	gui = get_glade_file (filename,
+			      root,
+			      domain,
+			      first_required_widget,
+			      args);
+
+	va_end (args);
+
+	if (!gui) {
+		return;
+	}
+
+	g_object_unref (gui);
+}
+
+GladeXML *
+empathy_glade_get_file (const gchar *filename,
+		       const gchar *root,
+		       const gchar *domain,
+		       const gchar *first_required_widget, ...)
+{
+	va_list   args;
+	GladeXML *gui;
+
+	va_start (args, first_required_widget);
+
+	gui = get_glade_file (filename,
+			      root,
+			      domain,
+			      first_required_widget,
+			      args);
+
+	va_end (args);
+
+	if (!gui) {
+		return NULL;
+	}
+
+	return gui;
+}
+
+void
+empathy_glade_connect (GladeXML *gui,
+		      gpointer  user_data,
+		      gchar     *first_widget, ...)
+{
+	va_list      args;
+	const gchar *name;
+	const gchar *signal;
+	GtkWidget   *widget;
+	gpointer    *callback;
+
+	va_start (args, first_widget);
+
+	for (name = first_widget; name; name = va_arg (args, char *)) {
+		signal = va_arg (args, void *);
+		callback = va_arg (args, void *);
+
+		widget = glade_xml_get_widget (gui, name);
+		if (!widget) {
+			g_warning ("Glade file is missing widget '%s', aborting",
+				   name);
+			continue;
+		}
+
+		g_signal_connect (widget,
+				  signal,
+				  G_CALLBACK (callback),
+				  user_data);
+	}
+
+	va_end (args);
+}
+
+void
+empathy_glade_setup_size_group (GladeXML         *gui,
+			       GtkSizeGroupMode  mode,
+			       gchar            *first_widget, ...)
+{
+	va_list       args;
+	GtkWidget    *widget;
+	GtkSizeGroup *size_group;
+	const gchar  *name;
+
+	va_start (args, first_widget);
+
+	size_group = gtk_size_group_new (mode);
+
+	for (name = first_widget; name; name = va_arg (args, char *)) {
+		widget = glade_xml_get_widget (gui, name);
+		if (!widget) {
+			g_warning ("Glade file is missing widget '%s'", name);
+			continue;
+		}
+
+		gtk_size_group_add_widget (size_group, widget);
+	}
+
+	g_object_unref (size_group);
+
+	va_end (args);
+}
+
+GdkPixbuf *
+empathy_pixbuf_from_icon_name (const gchar *icon_name,
+			      GtkIconSize  icon_size)
+{
+	GtkIconTheme  *theme;
+	GdkPixbuf     *pixbuf = NULL;
+	GError        *error = NULL;
+	gint           w, h;
+	gint           size = 48;
+
+	theme = gtk_icon_theme_get_default ();
+
+	if (gtk_icon_size_lookup (icon_size, &w, &h)) {
+		size = (w + h) / 2;
+	}
+
+	pixbuf = gtk_icon_theme_load_icon (theme,
+					   icon_name,
+					   size,
+					   0,
+					   &error);
+	if (error) {
+		empathy_debug (DEBUG_DOMAIN, "Error loading icon: %s", error->message);
+		g_clear_error (&error);
+	}
+
+	return pixbuf;
+}
+
+GdkPixbuf *
+empathy_pixbuf_from_smiley (EmpathySmiley type,
+			   GtkIconSize  icon_size)
+{
+	const gchar *icon_id;
+
+	switch (type) {
+	case EMPATHY_SMILEY_NORMAL:       /*  :)   */
+		icon_id = "stock_smiley-1";
+		break;
+	case EMPATHY_SMILEY_WINK:         /*  ;)   */
+		icon_id = "stock_smiley-3";
+		break;
+	case EMPATHY_SMILEY_BIGEYE:       /*  =)   */
+		icon_id = "stock_smiley-2";
+		break;
+	case EMPATHY_SMILEY_NOSE:         /*  :-)  */
+		icon_id = "stock_smiley-7";
+		break;
+	case EMPATHY_SMILEY_CRY:          /*  :'(  */
+		icon_id = "stock_smiley-11";
+		break;
+	case EMPATHY_SMILEY_SAD:          /*  :(   */
+		icon_id = "stock_smiley-4";
+		break;
+	case EMPATHY_SMILEY_SCEPTICAL:    /*  :/   */
+		icon_id = "stock_smiley-9";
+		break;
+	case EMPATHY_SMILEY_BIGSMILE:     /*  :D   */
+		icon_id = "stock_smiley-6";
+		break;
+	case EMPATHY_SMILEY_INDIFFERENT:  /*  :|   */
+		icon_id = "stock_smiley-8";
+		break;
+	case EMPATHY_SMILEY_TOUNGE:       /*  :p   */
+		icon_id = "stock_smiley-10";
+		break;
+	case EMPATHY_SMILEY_SHOCKED:      /*  :o   */
+		icon_id = "stock_smiley-5";
+		break;
+	case EMPATHY_SMILEY_COOL:         /*  8)   */
+		icon_id = "stock_smiley-15";
+		break;
+	case EMPATHY_SMILEY_SORRY:        /*  *|   */
+		icon_id = "stock_smiley-12";
+		break;
+	case EMPATHY_SMILEY_KISS:         /*  :*   */
+		icon_id = "stock_smiley-13";
+		break;
+	case EMPATHY_SMILEY_SHUTUP:       /*  :#   */
+		icon_id = "stock_smiley-14";
+		break;
+	case EMPATHY_SMILEY_YAWN:         /*  |O   */
+		icon_id = "";
+		break;
+	case EMPATHY_SMILEY_CONFUSED:     /*  :$   */
+		icon_id = "stock_smiley-17";
+		break;
+	case EMPATHY_SMILEY_ANGEL:        /*  O)   */
+		icon_id = "stock_smiley-18";
+		break;
+	case EMPATHY_SMILEY_OOOH:         /*  :x   */
+		icon_id = "stock_smiley-19";
+		break;
+	case EMPATHY_SMILEY_LOOKAWAY:     /*  *)   */
+		icon_id = "stock_smiley-20";
+		break;
+	case EMPATHY_SMILEY_BLUSH:        /*  *S   */
+		icon_id = "stock_smiley-23";
+		break;
+	case EMPATHY_SMILEY_COOLBIGSMILE: /*  8D   */
+		icon_id = "stock_smiley-25";
+		break;
+	case EMPATHY_SMILEY_ANGRY:        /*  :@   */
+		icon_id = "stock_smiley-16";
+		break;
+	case EMPATHY_SMILEY_BOSS:         /*  @)   */
+		icon_id = "stock_smiley-21";
+		break;
+	case EMPATHY_SMILEY_MONKEY:       /*  #)   */
+		icon_id = "stock_smiley-22";
+		break;
+	case EMPATHY_SMILEY_SILLY:        /*  O)   */
+		icon_id = "stock_smiley-24";
+		break;
+	case EMPATHY_SMILEY_SICK:         /*  +o(  */
+		icon_id = "stock_smiley-26";
+		break;
+
+	default:
+		g_assert_not_reached ();
+		icon_id = NULL;
+	}
+
+
+	return empathy_pixbuf_from_icon_name (icon_id, icon_size);
+}
+
+const gchar *
+empathy_icon_name_from_account (McAccount *account)
+{
+	McProfile *profile;
+
+	profile = mc_account_get_profile (account);
+
+	return mc_profile_get_icon_name (profile);
+}
+
+const gchar *
+empathy_icon_name_for_presence_state (McPresence state)
+{
+	switch (state) {
+	case MC_PRESENCE_AVAILABLE:
+		return EMPATHY_IMAGE_AVAILABLE;
+	case MC_PRESENCE_DO_NOT_DISTURB:
+		return EMPATHY_IMAGE_BUSY;
+	case MC_PRESENCE_AWAY:
+		return EMPATHY_IMAGE_AWAY;
+	case MC_PRESENCE_EXTENDED_AWAY:
+		return EMPATHY_IMAGE_EXT_AWAY;
+	case MC_PRESENCE_HIDDEN:
+	case MC_PRESENCE_OFFLINE:
+	case MC_PRESENCE_UNSET:
+		return EMPATHY_IMAGE_OFFLINE;
+	default:
+		g_assert_not_reached ();
+	}
+
+	return NULL;
+}
+
+const gchar *
+empathy_icon_name_for_presence (EmpathyPresence *presence)
+{
+	McPresence state;
+
+	g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
+			      EMPATHY_IMAGE_OFFLINE);
+
+	state = empathy_presence_get_state (presence);
+
+	return empathy_icon_name_for_presence_state (state);
+}
+
+const gchar *
+empathy_icon_name_for_contact (EmpathyContact *contact)
+{
+	EmpathyPresence     *presence;
+	EmpathySubscription  subscription;
+
+	g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
+			      EMPATHY_IMAGE_OFFLINE);
+
+	presence = empathy_contact_get_presence (contact);
+	if (presence) {
+		return empathy_icon_name_for_presence (presence);
+	}
+
+	subscription = empathy_contact_get_subscription (contact);
+	if (!(subscription & EMPATHY_SUBSCRIPTION_FROM)) {
+		return EMPATHY_IMAGE_PENDING;
+	}
+
+	return EMPATHY_IMAGE_OFFLINE;
+}
+
+GdkPixbuf *
+empathy_pixbuf_avatar_from_contact (EmpathyContact *contact)
+{
+	GdkPixbuf	*pixbuf;
+	GdkPixbufLoader	*loader;
+	EmpathyAvatar    *avatar;
+	GError          *error = NULL;
+
+	g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
+
+	avatar = empathy_contact_get_avatar (contact);
+	if (!avatar) {
+		return NULL;
+	}
+
+	loader = gdk_pixbuf_loader_new ();
+
+	if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
+		g_warning ("Couldn't write avatar image:%p with "
+			   "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
+			   avatar->data, avatar->len, error->message);
+		g_error_free (error);
+		return NULL;
+	}
+
+	gdk_pixbuf_loader_close (loader, NULL);
+
+	pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
+
+	g_object_ref (pixbuf);
+	g_object_unref (loader);
+
+	return pixbuf;
+}
+
+static void
+pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
+				     int              width,
+				     int              height,
+				     struct SizeData *data)
+{
+	g_return_if_fail (width > 0 && height > 0);
+
+	if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
+		if (width < data->width && height < data->height) {
+			width = width;
+			height = height;
+		}
+
+		if (data->width < 0) {
+			width = width * (double) data->height / (gdouble) height;
+			height = data->height;
+		} else if (data->height < 0) {
+			height = height * (double) data->width / (double) width;
+			width = data->width;
+		} else if ((double) height * (double) data->width >
+			   (double) width * (double) data->height) {
+			width = 0.5 + (double) width * (double) data->height / (double) height;
+			height = data->height;
+		} else {
+			height = 0.5 + (double) height * (double) data->width / (double) width;
+			width = data->width;
+		}
+	} else {
+		if (data->width > 0) {
+			width = data->width;
+		}
+
+		if (data->height > 0) {
+			height = data->height;
+		}
+	}
+
+	gdk_pixbuf_loader_set_size (loader, width, height);
+}
+
+GdkPixbuf *
+empathy_pixbuf_from_avatar_scaled (EmpathyAvatar *avatar,
+				  gint          width,
+				  gint          height)
+{
+	GdkPixbuf        *pixbuf;
+	GdkPixbufLoader	 *loader;
+	struct SizeData   data;
+	GError           *error = NULL;
+
+	if (!avatar) {
+		return NULL;
+	}
+
+	data.width = width;
+	data.height = height;
+	data.preserve_aspect_ratio = TRUE;
+
+	loader = gdk_pixbuf_loader_new ();
+
+	g_signal_connect (loader, "size-prepared",
+			  G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
+			  &data);
+
+	if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
+		g_warning ("Couldn't write avatar image:%p with "
+			   "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
+			   avatar->data, avatar->len, error->message);
+		g_error_free (error);
+		return NULL;
+	}
+
+	gdk_pixbuf_loader_close (loader, NULL);
+
+	pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
+
+	g_object_ref (pixbuf);
+	g_object_unref (loader);
+
+	return pixbuf;
+}
+
+GdkPixbuf *
+empathy_pixbuf_avatar_from_contact_scaled (EmpathyContact *contact,
+					  gint           width,
+					  gint           height)
+{
+	EmpathyAvatar *avatar;
+
+	g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
+
+	avatar = empathy_contact_get_avatar (contact);
+
+	return empathy_pixbuf_from_avatar_scaled (avatar, width, height);
+}
+/* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
+ * that to make it easier to apply changes from the original code.
+ */
+#define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
+
+/* this function acts like g_utf8_offset_to_pointer() except that if it finds a
+ * decomposable character it consumes the decomposition length from the given
+ * offset.  So it's useful when the offset was calculated for the normalized
+ * version of str, but we need a pointer to str itself. */
+static const gchar *
+pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
+{
+	gchar *casefold, *normal;
+	const gchar *p, *q;
+
+	p = str;
+	while (offset > 0)
+	{
+		q = g_utf8_next_char (p);
+		casefold = g_utf8_casefold (p, q - p);
+		normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+		offset -= g_utf8_strlen (normal, -1);
+		g_free (casefold);
+		g_free (normal);
+		p = q;
+	}
+	return p;
+}
+
+static const gchar *
+g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
+{
+	gsize needle_len;
+	gsize haystack_len;
+	const gchar *ret = NULL;
+	gchar *p;
+	gchar *casefold;
+	gchar *caseless_haystack;
+	gint i;
+
+	g_return_val_if_fail (haystack != NULL, NULL);
+	g_return_val_if_fail (needle != NULL, NULL);
+
+	casefold = g_utf8_casefold (haystack, -1);
+	caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+	g_free (casefold);
+
+	needle_len = g_utf8_strlen (needle, -1);
+	haystack_len = g_utf8_strlen (caseless_haystack, -1);
+
+	if (needle_len == 0)
+	{
+		ret = (gchar *)haystack;
+		goto finally_1;
+	}
+
+	if (haystack_len < needle_len)
+	{
+		ret = NULL;
+		goto finally_1;
+	}
+
+	p = (gchar*)caseless_haystack;
+	needle_len = strlen (needle);
+	i = 0;
+
+	while (*p)
+	{
+		if ((strncmp (p, needle, needle_len) == 0))
+		{
+			ret = pointer_from_offset_skipping_decomp (haystack, i);
+			goto finally_1;
+		}
+
+		p = g_utf8_next_char (p);
+		i++;
+	}
+
+finally_1:
+	g_free (caseless_haystack);
+
+	return ret;
+}
+
+static gboolean
+g_utf8_caselessnmatch (const char *s1, const char *s2,
+		       gssize n1, gssize n2)
+{
+	gchar *casefold;
+	gchar *normalized_s1;
+	gchar *normalized_s2;
+	gint len_s1;
+	gint len_s2;
+	gboolean ret = FALSE;
+
+	g_return_val_if_fail (s1 != NULL, FALSE);
+	g_return_val_if_fail (s2 != NULL, FALSE);
+	g_return_val_if_fail (n1 > 0, FALSE);
+	g_return_val_if_fail (n2 > 0, FALSE);
+
+	casefold = g_utf8_casefold (s1, n1);
+	normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+	g_free (casefold);
+
+	casefold = g_utf8_casefold (s2, n2);
+	normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+	g_free (casefold);
+
+	len_s1 = strlen (normalized_s1);
+	len_s2 = strlen (normalized_s2);
+
+	if (len_s1 < len_s2)
+		goto finally_2;
+
+	ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
+
+finally_2:
+	g_free (normalized_s1);
+	g_free (normalized_s2);
+
+	return ret;
+}
+
+static void
+forward_chars_with_skipping (GtkTextIter *iter,
+			     gint         count,
+			     gboolean     skip_invisible,
+			     gboolean     skip_nontext,
+			     gboolean     skip_decomp)
+{
+	gint i;
+
+	g_return_if_fail (count >= 0);
+
+	i = count;
+
+	while (i > 0)
+	{
+		gboolean ignored = FALSE;
+
+		/* minimal workaround to avoid the infinite loop of bug #168247.
+		 * It doesn't fix the problemjust the symptom...
+		 */
+		if (gtk_text_iter_is_end (iter))
+			return;
+
+		if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
+			ignored = TRUE;
+
+		if (!ignored && skip_invisible &&
+		    /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
+			ignored = TRUE;
+
+		if (!ignored && skip_decomp)
+		{
+			/* being UTF8 correct sucks; this accounts for extra
+			   offsets coming from canonical decompositions of
+			   UTF8 characters (e.g. accented characters) which
+			   g_utf8_normalize() performs */
+			gchar *normal;
+			gchar buffer[6];
+			gint buffer_len;
+
+			buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
+			normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
+			i -= (g_utf8_strlen (normal, -1) - 1);
+			g_free (normal);
+		}
+
+		gtk_text_iter_forward_char (iter);
+
+		if (!ignored)
+			--i;
+	}
+}
+
+static gboolean
+lines_match (const GtkTextIter *start,
+	     const gchar      **lines,
+	     gboolean           visible_only,
+	     gboolean           slice,
+	     GtkTextIter       *match_start,
+	     GtkTextIter       *match_end)
+{
+	GtkTextIter next;
+	gchar *line_text;
+	const gchar *found;
+	gint offset;
+
+	if (*lines == NULL || **lines == '\0')
+	{
+		if (match_start)
+			*match_start = *start;
+		if (match_end)
+			*match_end = *start;
+		return TRUE;
+	}
+
+	next = *start;
+	gtk_text_iter_forward_line (&next);
+
+	/* No more text in buffer, but *lines is nonempty */
+	if (gtk_text_iter_equal (start, &next))
+		return FALSE;
+
+	if (slice)
+	{
+		if (visible_only)
+			line_text = gtk_text_iter_get_visible_slice (start, &next);
+		else
+			line_text = gtk_text_iter_get_slice (start, &next);
+	}
+	else
+	{
+		if (visible_only)
+			line_text = gtk_text_iter_get_visible_text (start, &next);
+		else
+			line_text = gtk_text_iter_get_text (start, &next);
+	}
+
+	if (match_start) /* if this is the first line we're matching */
+	{
+		found = g_utf8_strcasestr (line_text, *lines);
+	}
+	else
+	{
+		/* If it's not the first line, we have to match from the
+		 * start of the line.
+		 */
+		if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
+					   strlen (*lines)))
+			found = line_text;
+		else
+			found = NULL;
+	}
+
+	if (found == NULL)
+	{
+		g_free (line_text);
+		return FALSE;
+	}
+
+	/* Get offset to start of search string */
+	offset = g_utf8_strlen (line_text, found - line_text);
+
+	next = *start;
+
+	/* If match start needs to be returned, set it to the
+	 * start of the search string.
+	 */
+	forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
+	if (match_start)
+	{
+		*match_start = next;
+	}
+
+	/* Go to end of search string */
+	forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
+
+	g_free (line_text);
+
+	++lines;
+
+	if (match_end)
+		*match_end = next;
+
+	/* pass NULL for match_start, since we don't need to find the
+	 * start again.
+	 */
+	return lines_match (&next, lines, visible_only, slice, NULL, match_end);
+}
+
+/* strsplit () that retains the delimiter as part of the string. */
+static gchar **
+strbreakup (const char *string,
+	    const char *delimiter,
+	    gint        max_tokens)
+{
+	GSList *string_list = NULL, *slist;
+	gchar **str_array, *s, *casefold, *new_string;
+	guint i, n = 1;
+
+	g_return_val_if_fail (string != NULL, NULL);
+	g_return_val_if_fail (delimiter != NULL, NULL);
+
+	if (max_tokens < 1)
+		max_tokens = G_MAXINT;
+
+	s = strstr (string, delimiter);
+	if (s)
+	{
+		guint delimiter_len = strlen (delimiter);
+
+		do
+		{
+			guint len;
+
+			len = s - string + delimiter_len;
+			new_string = g_new (gchar, len + 1);
+			strncpy (new_string, string, len);
+			new_string[len] = 0;
+			casefold = g_utf8_casefold (new_string, -1);
+			g_free (new_string);
+			new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+			g_free (casefold);
+			string_list = g_slist_prepend (string_list, new_string);
+			n++;
+			string = s + delimiter_len;
+			s = strstr (string, delimiter);
+		} while (--max_tokens && s);
+	}
+
+	if (*string)
+	{
+		n++;
+		casefold = g_utf8_casefold (string, -1);
+		new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+		g_free (casefold);
+		string_list = g_slist_prepend (string_list, new_string);
+	}
+
+	str_array = g_new (gchar*, n);
+
+	i = n - 1;
+
+	str_array[i--] = NULL;
+	for (slist = string_list; slist; slist = slist->next)
+		str_array[i--] = slist->data;
+
+	g_slist_free (string_list);
+
+	return str_array;
+}
+
+gboolean
+empathy_text_iter_forward_search (const GtkTextIter   *iter,
+				 const gchar         *str,
+				 GtkTextIter         *match_start,
+				 GtkTextIter         *match_end,
+				 const GtkTextIter   *limit)
+{
+	gchar **lines = NULL;
+	GtkTextIter match;
+	gboolean retval = FALSE;
+	GtkTextIter search;
+	gboolean visible_only;
+	gboolean slice;
+
+	g_return_val_if_fail (iter != NULL, FALSE);
+	g_return_val_if_fail (str != NULL, FALSE);
+
+	if (limit && gtk_text_iter_compare (iter, limit) >= 0)
+		return FALSE;
+
+	if (*str == '\0') {
+		/* If we can move one char, return the empty string there */
+		match = *iter;
+
+		if (gtk_text_iter_forward_char (&match)) {
+			if (limit && gtk_text_iter_equal (&match, limit)) {
+				return FALSE;
+			}
+
+			if (match_start) {
+				*match_start = match;
+			}
+			if (match_end) {
+				*match_end = match;
+			}
+			return TRUE;
+		} else {
+			return FALSE;
+		}
+	}
+
+	visible_only = TRUE;
+	slice = FALSE;
+
+	/* locate all lines */
+	lines = strbreakup (str, "\n", -1);
+
+	search = *iter;
+
+	do {
+		/* This loop has an inefficient worst-case, where
+		 * gtk_text_iter_get_text () is called repeatedly on
+		 * a single line.
+		 */
+		GtkTextIter end;
+
+		if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
+			break;
+		}
+
+		if (lines_match (&search, (const gchar**)lines,
+				 visible_only, slice, &match, &end)) {
+			if (limit == NULL ||
+			    (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
+				retval = TRUE;
+
+				if (match_start) {
+					*match_start = match;
+				}
+				if (match_end) {
+					*match_end = end;
+				}
+			}
+			break;
+		}
+	} while (gtk_text_iter_forward_line (&search));
+
+	g_strfreev ((gchar**)lines);
+
+	return retval;
+}
+
+static const gchar *
+g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
+{
+	gsize needle_len;
+	gsize haystack_len;
+	const gchar *ret = NULL;
+	gchar *p;
+	gchar *casefold;
+	gchar *caseless_haystack;
+	gint i;
+
+	g_return_val_if_fail (haystack != NULL, NULL);
+	g_return_val_if_fail (needle != NULL, NULL);
+
+	casefold = g_utf8_casefold (haystack, -1);
+	caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
+	g_free (casefold);
+
+	needle_len = g_utf8_strlen (needle, -1);
+	haystack_len = g_utf8_strlen (caseless_haystack, -1);
+
+	if (needle_len == 0)
+	{
+		ret = (gchar *)haystack;
+		goto finally_1;
+	}
+
+	if (haystack_len < needle_len)
+	{
+		ret = NULL;
+		goto finally_1;
+	}
+
+	i = haystack_len - needle_len;
+	p = g_utf8_offset_to_pointer (caseless_haystack, i);
+	needle_len = strlen (needle);
+
+	while (p >= caseless_haystack)
+	{
+		if (strncmp (p, needle, needle_len) == 0)
+		{
+			ret = pointer_from_offset_skipping_decomp (haystack, i);
+			goto finally_1;
+		}
+
+		p = g_utf8_prev_char (p);
+		i--;
+	}
+
+finally_1:
+	g_free (caseless_haystack);
+
+	return ret;
+}
+
+static gboolean
+backward_lines_match (const GtkTextIter *start,
+		      const gchar      **lines,
+		      gboolean           visible_only,
+		      gboolean           slice,
+		      GtkTextIter       *match_start,
+		      GtkTextIter       *match_end)
+{
+	GtkTextIter line, next;
+	gchar *line_text;
+	const gchar *found;
+	gint offset;
+
+	if (*lines == NULL || **lines == '\0')
+	{
+		if (match_start)
+			*match_start = *start;
+		if (match_end)
+			*match_end = *start;
+		return TRUE;
+	}
+
+	line = next = *start;
+	if (gtk_text_iter_get_line_offset (&next) == 0)
+	{
+		if (!gtk_text_iter_backward_line (&next))
+			return FALSE;
+	}
+	else
+		gtk_text_iter_set_line_offset (&next, 0);
+
+	if (slice)
+	{
+		if (visible_only)
+			line_text = gtk_text_iter_get_visible_slice (&next, &line);
+		else
+			line_text = gtk_text_iter_get_slice (&next, &line);
+	}
+	else
+	{
+		if (visible_only)
+			line_text = gtk_text_iter_get_visible_text (&next, &line);
+		else
+			line_text = gtk_text_iter_get_text (&next, &line);
+	}
+
+	if (match_start) /* if this is the first line we're matching */
+	{
+		found = g_utf8_strrcasestr (line_text, *lines);
+	}
+	else
+	{
+		/* If it's not the first line, we have to match from the
+		 * start of the line.
+		 */
+		if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
+					   strlen (*lines)))
+			found = line_text;
+		else
+			found = NULL;
+	}
+
+	if (found == NULL)
+	{
+		g_free (line_text);
+		return FALSE;
+	}
+
+	/* Get offset to start of search string */
+	offset = g_utf8_strlen (line_text, found - line_text);
+
+	forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
+
+	/* If match start needs to be returned, set it to the
+	 * start of the search string.
+	 */
+	if (match_start)
+	{
+		*match_start = next;
+	}
+
+	/* Go to end of search string */
+	forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
+
+	g_free (line_text);
+
+	++lines;
+
+	if (match_end)
+		*match_end = next;
+
+	/* try to match the rest of the lines forward, passing NULL
+	 * for match_start so lines_match will try to match the entire
+	 * line */
+	return lines_match (&next, lines, visible_only,
+			    slice, NULL, match_end);
+}
+
+gboolean
+empathy_text_iter_backward_search (const GtkTextIter   *iter,
+				  const gchar         *str,
+				  GtkTextIter         *match_start,
+				  GtkTextIter         *match_end,
+				  const GtkTextIter   *limit)
+{
+	gchar **lines = NULL;
+	GtkTextIter match;
+	gboolean retval = FALSE;
+	GtkTextIter search;
+	gboolean visible_only;
+	gboolean slice;
+
+	g_return_val_if_fail (iter != NULL, FALSE);
+	g_return_val_if_fail (str != NULL, FALSE);
+
+	if (limit && gtk_text_iter_compare (iter, limit) <= 0)
+		return FALSE;
+
+	if (*str == '\0')
+	{
+		/* If we can move one char, return the empty string there */
+		match = *iter;
+
+		if (gtk_text_iter_backward_char (&match))
+		{
+			if (limit && gtk_text_iter_equal (&match, limit))
+				return FALSE;
+
+			if (match_start)
+				*match_start = match;
+			if (match_end)
+				*match_end = match;
+			return TRUE;
+		}
+		else
+		{
+			return FALSE;
+		}
+	}
+
+	visible_only = TRUE;
+	slice = TRUE;
+
+	/* locate all lines */
+	lines = strbreakup (str, "\n", -1);
+
+	search = *iter;
+
+	while (TRUE)
+	{
+		/* This loop has an inefficient worst-case, where
+		 * gtk_text_iter_get_text () is called repeatedly on
+		 * a single line.
+		 */
+		GtkTextIter end;
+
+		if (limit && gtk_text_iter_compare (&search, limit) <= 0)
+			break;
+
+		if (backward_lines_match (&search, (const gchar**)lines,
+					  visible_only, slice, &match, &end))
+		{
+			if (limit == NULL || (limit &&
+					      gtk_text_iter_compare (&end, limit) > 0))
+			{
+				retval = TRUE;
+
+				if (match_start)
+					*match_start = match;
+				if (match_end)
+					*match_end = end;
+			}
+			break;
+		}
+
+		if (gtk_text_iter_get_line_offset (&search) == 0)
+		{
+			if (!gtk_text_iter_backward_line (&search))
+				break;
+		}
+		else
+		{
+			gtk_text_iter_set_line_offset (&search, 0);
+		}
+	}
+
+	g_strfreev ((gchar**)lines);
+
+	return retval;
+}
+
+static gboolean
+window_get_is_on_current_workspace (GtkWindow *window)
+{
+	GdkWindow *gdk_window;
+
+	gdk_window = GTK_WIDGET (window)->window;
+	if (gdk_window) {
+		return !(gdk_window_get_state (gdk_window) &
+			 GDK_WINDOW_STATE_ICONIFIED);
+	} else {
+		return FALSE;
+	}
+}
+
+/* Checks if the window is visible as in visible on the current workspace. */
+gboolean
+empathy_window_get_is_visible (GtkWindow *window)
+{
+	gboolean visible;
+
+	g_return_val_if_fail (window != NULL, FALSE);
+
+	g_object_get (window,
+		      "visible", &visible,
+		      NULL);
+
+	return visible && window_get_is_on_current_workspace (window);
+}
+
+/* Takes care of moving the window to the current workspace. */
+void
+empathy_window_present (GtkWindow *window,
+		       gboolean   steal_focus)
+{
+	gboolean visible;
+	gboolean on_current;
+	guint32  timestamp;
+
+	g_return_if_fail (window != NULL);
+
+	/* There are three cases: hidden, visible, visible on another
+	 * workspace.
+	 */
+
+	g_object_get (window,
+		      "visible", &visible,
+		      NULL);
+
+	on_current = window_get_is_on_current_workspace (window);
+
+	if (visible && !on_current) {
+		/* Hide it so present brings it to the current workspace. */
+		gtk_widget_hide (GTK_WIDGET (window));
+	}
+
+	timestamp = gtk_get_current_event_time ();
+	if (steal_focus && timestamp != GDK_CURRENT_TIME) {
+		gtk_window_present_with_time (window, timestamp);
+	} else {
+		gtk_window_present (window);
+	}
+}
+
+GtkWindow *
+empathy_get_toplevel_window (GtkWidget *widget)
+{
+	GtkWidget *toplevel;
+
+	g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
+
+	toplevel = gtk_widget_get_toplevel (widget);
+	if (GTK_IS_WINDOW (toplevel)) {
+		return GTK_WINDOW (toplevel);
+	}
+
+	return NULL;
+}
+
+/* The URL opening code can't handle schemeless strings, so we try to be
+ * smart and add http if there is no scheme or doesn't look like a mail
+ * address. This should work in most cases, and let us click on strings
+ * like "www.gnome.org".
+ */
+static gchar *
+fixup_url (const gchar *url)
+{
+	gchar *real_url;
+
+	if (!g_str_has_prefix (url, "http://") &&
+	    !strstr (url, ":/") &&
+	    !strstr (url, "@")) {
+		real_url = g_strdup_printf ("http://%s", url);
+	} else {
+		real_url = g_strdup (url);
+	}
+
+	return real_url;
+}
+
+void
+empathy_url_show (const char *url)
+{
+	gchar          *real_url;
+	GnomeVFSResult  res;
+
+	real_url = fixup_url (url);
+	res = gnome_vfs_url_show (real_url);
+	if (res != GNOME_VFS_OK) {
+		empathy_debug (DEBUG_DOMAIN, "Couldn't show URL %s: %s",
+			      real_url,
+			      gnome_vfs_result_to_string (res));
+	}
+
+	g_free (real_url);
+}
+
+static void
+link_button_hook (GtkLinkButton *button,
+		  const gchar *link,
+		  gpointer user_data)
+{
+	empathy_url_show (link);
+}
+
+GtkWidget *
+empathy_link_button_new (const gchar *url,
+			const gchar *title)
+{
+	static gboolean hook = FALSE;
+
+	if (!hook) {
+		hook = TRUE;
+		gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
+	}
+
+	return gtk_link_button_new_with_label (url, title);
+}
+
+void
+empathy_toggle_button_set_state_quietly (GtkWidget *widget,
+					GCallback  callback,
+					gpointer   user_data,
+					gboolean   active)
+{
+	g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
+
+	g_signal_handlers_block_by_func (widget, callback, user_data);
+	g_object_set (widget, "active", active, NULL);
+	g_signal_handlers_unblock_by_func (widget, callback, user_data);
+}
+