EmpathyChatView as GInterface

svn path=/trunk/; revision=1978

1 files changed, 124 insertions, 1157 deletions

diff --git a/libempathy-gtk/empathy-chat-view.c b/libempathy-gtk/empathy-chat-view.c
index 5adccaff0..4fccfb2ff 100644
--- a/libempathy-gtk/empathy-chat-view.c
+++ b/libempathy-gtk/empathy-chat-view.c
@@ -24,622 +24,56 @@
 
 #include "config.h"
 
-#include <sys/types.h>
-#include <string.h>
-#include <time.h>
-
-#include <glib/gi18n-lib.h>
-#include <gtk/gtkbutton.h>
-#include <gtk/gtkimage.h>
-#include <gtk/gtkmenu.h>
-#include <gtk/gtkmenuitem.h>
-#include <gtk/gtkimagemenuitem.h>
-#include <gtk/gtkstock.h>
-#include <gtk/gtkscrolledwindow.h>
-#include <gtk/gtksizegroup.h>
-#include <glade/glade.h>
-
 #include <telepathy-glib/util.h>
 #include <libmissioncontrol/mc-account.h>
 
 #include <libempathy/empathy-utils.h>
 
 #include "empathy-chat-view.h"
+
 #include "empathy-chat.h"
 #include "empathy-conf.h"
-#include "empathy-theme-manager.h"
 #include "empathy-ui-utils.h"
+
 #include "empathy-smiley-manager.h"
 
 #define DEBUG_FLAG EMPATHY_DEBUG_CHAT
 #include <libempathy/empathy-debug.h>
 
-/* Number of seconds between timestamps when using normal mode, 5 minutes. */
-#define TIMESTAMP_INTERVAL 300
-
-#define MAX_LINES 800
-#define MAX_SCROLL_TIME 0.4 /* seconds */
-#define SCROLL_DELAY 33     /* milliseconds */
-
-#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyChatView)
-typedef struct {
-	GtkTextBuffer *buffer;
-
-	EmpathyTheme   *theme;
-
-	time_t         last_timestamp;
-
-	gboolean       allow_scrolling;
-	guint          scroll_timeout;
-	GTimer        *scroll_time;
-
-	GtkTextMark   *find_mark_previous;
-	GtkTextMark   *find_mark_next;
-	gboolean       find_wrapped;
-	gboolean       find_last_direction;
-
-	/* This is for the group chat so we know if the "other" last contact
-	 * changed, so we know whether to insert a header or not.
-	 */
-	EmpathyContact *last_contact;
-
-	guint          notify_system_fonts_id;
-	guint          notify_show_avatars_id;
-} EmpathyChatViewPriv;
-
-static void     chat_view_finalize                   (GObject                  *object);
-static gboolean chat_view_drag_motion                (GtkWidget                *widget,
-						      GdkDragContext           *context,
-						      gint                      x,
-						      gint                      y,
-						      guint                     time);
-static void     chat_view_size_allocate              (GtkWidget                *widget,
-						      GtkAllocation            *alloc);
-static void     chat_view_setup_tags                 (EmpathyChatView           *view);
-static void     chat_view_system_font_update         (EmpathyChatView           *view);
-static void     chat_view_notify_system_font_cb      (EmpathyConf               *conf,
-						      const gchar              *key,
-						      gpointer                  user_data);
-static void     chat_view_notify_show_avatars_cb     (EmpathyConf               *conf,
-						      const gchar              *key,
-						      gpointer                  user_data);
-static void     chat_view_populate_popup             (EmpathyChatView           *view,
-						      GtkMenu                  *menu,
-						      gpointer                  user_data);
-static gboolean chat_view_event_cb                   (EmpathyChatView           *view,
-						      GdkEventMotion           *event,
-						      GtkTextTag               *tag);
-static gboolean chat_view_url_event_cb               (GtkTextTag               *tag,
-						      GObject                  *object,
-						      GdkEvent                 *event,
-						      GtkTextIter              *iter,
-						      EmpathyChatView          *view);
-static void     chat_view_open_address_cb            (GtkMenuItem              *menuitem,
-						      const gchar              *url);
-static void     chat_view_copy_address_cb            (GtkMenuItem              *menuitem,
-						      const gchar              *url);
-static void     chat_view_clear_view_cb              (GtkMenuItem              *menuitem,
-						      EmpathyChatView           *view);
-static gboolean chat_view_is_scrolled_down           (EmpathyChatView           *view);
-static void     chat_view_theme_changed_cb           (EmpathyThemeManager       *manager,
-						      EmpathyChatView           *view);
-static void     chat_view_theme_notify_cb            (EmpathyTheme              *theme,
-						      GParamSpec                *param,
-						      EmpathyChatView           *view);
-
-G_DEFINE_TYPE (EmpathyChatView, empathy_chat_view, GTK_TYPE_TEXT_VIEW);
-
-static void
-empathy_chat_view_class_init (EmpathyChatViewClass *klass)
-{
-	GObjectClass   *object_class = G_OBJECT_CLASS (klass);
-	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-	object_class->finalize = chat_view_finalize;
-	widget_class->size_allocate = chat_view_size_allocate;
- 	widget_class->drag_motion = chat_view_drag_motion; 
-
-	g_type_class_add_private (object_class, sizeof (EmpathyChatViewPriv));
-}
-
-static void
-empathy_chat_view_init (EmpathyChatView *view)
-{
-	gboolean             show_avatars;
-	EmpathyChatViewPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (view,
-		EMPATHY_TYPE_CHAT_VIEW, EmpathyChatViewPriv);
-
-	view->priv = priv;
-	priv->buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
-	priv->last_timestamp = 0;
-	priv->allow_scrolling = TRUE;
-
-	g_object_set (view,
-		      "wrap-mode", GTK_WRAP_WORD_CHAR,
-		      "editable", FALSE,
-		      "cursor-visible", FALSE,
-		      NULL);
-
-	priv->notify_system_fonts_id =
-		empathy_conf_notify_add (empathy_conf_get (),
-					 "/desktop/gnome/interface/document_font_name",
-					 chat_view_notify_system_font_cb,
-					 view);
-	chat_view_system_font_update (view);
-
-	priv->notify_show_avatars_id =
-		empathy_conf_notify_add (empathy_conf_get (),
-					 EMPATHY_PREFS_UI_SHOW_AVATARS,
-					 chat_view_notify_show_avatars_cb,
-					 view);
-
-	chat_view_setup_tags (view);
-
-	empathy_theme_manager_apply_saved (empathy_theme_manager_get (), view);
-
-	show_avatars = FALSE;
-	empathy_conf_get_bool (empathy_conf_get (),
-			       EMPATHY_PREFS_UI_SHOW_AVATARS,
-			       &show_avatars);
-
-	empathy_theme_set_show_avatars (priv->theme, show_avatars);
-
-	g_signal_connect (view,
-			  "populate-popup",
-			  G_CALLBACK (chat_view_populate_popup),
-			  NULL);
-
-	g_signal_connect_object (empathy_theme_manager_get (),
-				 "theme-changed",
-				 G_CALLBACK (chat_view_theme_changed_cb),
-				 view,
-				 0);
-}
-
-static void
-chat_view_finalize (GObject *object)
-{
-	EmpathyChatView     *view;
-	EmpathyChatViewPriv *priv;
-
-	view = EMPATHY_CHAT_VIEW (object);
-	priv = GET_PRIV (view);
-
-	DEBUG ("finalize: %p", object);
-
-	empathy_conf_notify_remove (empathy_conf_get (), priv->notify_system_fonts_id);
-	empathy_conf_notify_remove (empathy_conf_get (), priv->notify_show_avatars_id);
-
-	if (priv->last_contact) {
-		g_object_unref (priv->last_contact);
-	}
-	if (priv->scroll_time) {
-		g_timer_destroy (priv->scroll_time);
-	}
-	if (priv->scroll_timeout) {
-		g_source_remove (priv->scroll_timeout);
-	}
-
-	if (priv->theme) {
-		g_signal_handlers_disconnect_by_func (priv->theme,
-						      chat_view_theme_notify_cb,
-						      view);
-		g_object_unref (priv->theme);
-	}
-
-	G_OBJECT_CLASS (empathy_chat_view_parent_class)->finalize (object);
-}
-
-static gboolean
-chat_view_drag_motion (GtkWidget        *widget,
-		       GdkDragContext   *context,
-		       gint              x,
-		       gint              y,
-		       guint             time)
-{
-	/* Don't handle drag motion, since we don't want the view to scroll as
-	 * the result of dragging something across it.
-	 */
-
-	return FALSE;
-}
-
-static void
-chat_view_size_allocate (GtkWidget     *widget,
-			 GtkAllocation *alloc)
-{
-	gboolean down;
-
-	down = chat_view_is_scrolled_down (EMPATHY_CHAT_VIEW (widget));
-
-	GTK_WIDGET_CLASS (empathy_chat_view_parent_class)->size_allocate (widget, alloc);
-
-	if (down) {
-		GtkAdjustment *adj;
-
-		adj = GTK_TEXT_VIEW (widget)->vadjustment;
-		gtk_adjustment_set_value (adj, adj->upper - adj->page_size);
-	}
-}
-
-static void
-chat_view_setup_tags (EmpathyChatView *view)
-{
-	EmpathyChatViewPriv *priv;
-	GtkTextTag         *tag;
-
-	priv = GET_PRIV (view);
-
-	gtk_text_buffer_create_tag (priv->buffer,
-				    "cut",
-				    NULL);
-
-	/* FIXME: Move to the theme and come up with something that looks a bit
-	 * nicer.
-	 */
-	gtk_text_buffer_create_tag (priv->buffer,
-				    "highlight",
-				    "background", "yellow",
-				    NULL);
-
-	tag = gtk_text_buffer_create_tag (priv->buffer,
-					  "link",
-					  NULL);
-
-	g_signal_connect (tag,
-			  "event",
-			  G_CALLBACK (chat_view_url_event_cb),
-			  view);
-
-	g_signal_connect (view,
-			  "motion-notify-event",
-			  G_CALLBACK (chat_view_event_cb),
-			  tag);
-}
-
-static void
-chat_view_system_font_update (EmpathyChatView *view)
-{
-	PangoFontDescription *font_description = NULL;
-	gchar                *font_name;
-
-	if (empathy_conf_get_string (empathy_conf_get (),
-				     "/desktop/gnome/interface/document_font_name",
-				     &font_name) && font_name) {
-		font_description = pango_font_description_from_string (font_name);
-		g_free (font_name);
-	} else {
-		font_description = NULL;
-	}
-
-	gtk_widget_modify_font (GTK_WIDGET (view), font_description);
-
-	if (font_description) {
-		pango_font_description_free (font_description);
-	}
-}
-
-static void
-chat_view_notify_system_font_cb (EmpathyConf  *conf,
-				 const gchar *key,
-				 gpointer     user_data)
-{
-	EmpathyChatView *view;
-	EmpathyChatViewPriv *priv;
-	gboolean        show_avatars = FALSE;
-
-	view = user_data;
-	priv = GET_PRIV (view);
-
-	chat_view_system_font_update (view);
-
-	/* Ugly, again, to adjust the vertical position of the nick... Will fix
-	 * this when reworking the theme manager so that view register
-	 * themselves with it instead of the other way around.
-	 */
-	empathy_conf_get_bool (conf,
-			       EMPATHY_PREFS_UI_SHOW_AVATARS,
-			       &show_avatars);
-
-	empathy_theme_set_show_avatars (priv->theme, show_avatars);
-}
-
-static void
-chat_view_notify_show_avatars_cb (EmpathyConf  *conf,
-				  const gchar *key,
-				  gpointer     user_data)
-{
-	EmpathyChatView     *view;
-	EmpathyChatViewPriv *priv;
-	gboolean            show_avatars = FALSE;
-
-	view = user_data;
-	priv = GET_PRIV (view);
-
-	empathy_conf_get_bool (conf, key, &show_avatars);
-
-	empathy_theme_set_show_avatars (priv->theme, show_avatars);
-}
-
-static void
-chat_view_populate_popup (EmpathyChatView *view,
-			  GtkMenu        *menu,
-			  gpointer        user_data)
-{
-	EmpathyChatViewPriv *priv;
-	GtkTextTagTable    *table;
-	GtkTextTag         *tag;
-	gint                x, y;
-	GtkTextIter         iter, start, end;
-	GtkWidget          *item;
-	gchar              *str = NULL;
-
-	priv = GET_PRIV (view);
-
-	/* Clear menu item */
-	if (gtk_text_buffer_get_char_count (priv->buffer) > 0) {
-		item = gtk_menu_item_new ();
-		gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
-		gtk_widget_show (item);
-
-		item = gtk_image_menu_item_new_from_stock (GTK_STOCK_CLEAR, NULL);
-		gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
-		gtk_widget_show (item);
-
-		g_signal_connect (item,
-				  "activate",
-				  G_CALLBACK (chat_view_clear_view_cb),
-				  view);
-	}
-
-	/* Link context menu items */
-	table = gtk_text_buffer_get_tag_table (priv->buffer);
-	tag = gtk_text_tag_table_lookup (table, "link");
-
-	gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
-
-	gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (view),
-					       GTK_TEXT_WINDOW_WIDGET,
-					       x, y,
-					       &x, &y);
-
-	gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (view), &iter, x, y);
-
-	start = end = iter;
+static void chat_view_base_init (gpointer klass);
 
-	if (gtk_text_iter_backward_to_tag_toggle (&start, tag) &&
-	    gtk_text_iter_forward_to_tag_toggle (&end, tag)) {
-		str = gtk_text_buffer_get_text (priv->buffer,
-						&start, &end, FALSE);
-	}
-
-	if (G_STR_EMPTY (str)) {
-		g_free (str);
-		return;
-	}
-
-	/* NOTE: Set data just to get the string freed when not needed. */
-	g_object_set_data_full (G_OBJECT (menu),
-				"url", str,
-				(GDestroyNotify) g_free);
-
-	item = gtk_menu_item_new ();
-	gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
-	gtk_widget_show (item);
-
-	item = gtk_menu_item_new_with_mnemonic (_("_Copy Link Address"));
-	g_signal_connect (item,
-			  "activate",
-			  G_CALLBACK (chat_view_copy_address_cb),
-			  str);
-	gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
-	gtk_widget_show (item);
-
-	item = gtk_menu_item_new_with_mnemonic (_("_Open Link"));
-	g_signal_connect (item,
-			  "activate",
-			  G_CALLBACK (chat_view_open_address_cb),
-			  str);
-	gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
-	gtk_widget_show (item);
-}
-
-static gboolean
-chat_view_event_cb (EmpathyChatView *view,
-		    GdkEventMotion *event,
-		    GtkTextTag     *tag)
+GType
+empathy_chat_view_get_type (void)
 {
-	static GdkCursor  *hand = NULL;
-	static GdkCursor  *beam = NULL;
-	GtkTextWindowType  type;
-	GtkTextIter        iter;
-	GdkWindow         *win;
-	gint               x, y, buf_x, buf_y;
-
-	type = gtk_text_view_get_window_type (GTK_TEXT_VIEW (view),
-					      event->window);
-
-	if (type != GTK_TEXT_WINDOW_TEXT) {
-		return FALSE;
-	}
-
-	/* Get where the pointer really is. */
-	win = gtk_text_view_get_window (GTK_TEXT_VIEW (view), type);
-	if (!win) {
-		return FALSE;
-	}
-
-	gdk_window_get_pointer (win, &x, &y, NULL);
-
-	/* Get the iter where the cursor is at */
-	gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (view), type,
-					       x, y,
-					       &buf_x, &buf_y);
-
-	gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (view),
-					    &iter,
-					    buf_x, buf_y);
-
-	if (gtk_text_iter_has_tag (&iter, tag)) {
-		if (!hand) {
-			hand = gdk_cursor_new (GDK_HAND2);
-			beam = gdk_cursor_new (GDK_XTERM);
-		}
-		gdk_window_set_cursor (win, hand);
-	} else {
-		if (!beam) {
-			beam = gdk_cursor_new (GDK_XTERM);
-		}
-		gdk_window_set_cursor (win, beam);
-	}
-
-	return FALSE;
-}
-
-static gboolean
-chat_view_url_event_cb (GtkTextTag      *tag,
-			GObject         *object,
-			GdkEvent        *event,
-			GtkTextIter     *iter,
-			EmpathyChatView *view)
-{
-	GtkTextIter          start, end;
-	gchar               *str;
-	EmpathyChatViewPriv *priv;
-
-	priv = GET_PRIV (view);
-
-	/* If the link is being selected, don't do anything. */
-	gtk_text_buffer_get_selection_bounds (priv->buffer, &start, &end);
-	if (gtk_text_iter_get_offset (&start) != gtk_text_iter_get_offset (&end)) {
-		return FALSE;
-	}
-
-	if (event->type == GDK_BUTTON_RELEASE && event->button.button == 1) {
-		start = end = *iter;
-
-		if (gtk_text_iter_backward_to_tag_toggle (&start, tag) &&
-		    gtk_text_iter_forward_to_tag_toggle (&end, tag)) {
-			str = gtk_text_buffer_get_text (priv->buffer,
-							&start,
-							&end,
-							FALSE);
-
-			empathy_url_show (GTK_WIDGET (view), str);
-			g_free (str);
-		}
-	}
-
-	return FALSE;
-}
-
-static void
-chat_view_open_address_cb (GtkMenuItem *menuitem, const gchar *url)
-{
-	empathy_url_show (GTK_WIDGET (menuitem), url);
-}
-
-static void
-chat_view_copy_address_cb (GtkMenuItem *menuitem, const gchar *url)
-{
-	GtkClipboard *clipboard;
-
-	clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
-	gtk_clipboard_set_text (clipboard, url, -1);
-
-	clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY);
-	gtk_clipboard_set_text (clipboard, url, -1);
-}
-
-static void
-chat_view_clear_view_cb (GtkMenuItem *menuitem, EmpathyChatView *view)
-{
-	empathy_chat_view_clear (view);
-}
-
-static gboolean
-chat_view_is_scrolled_down (EmpathyChatView *view)
-{
-	GtkWidget *sw;
-
-	sw = gtk_widget_get_parent (GTK_WIDGET (view));
-	if (GTK_IS_SCROLLED_WINDOW (sw)) {
-		GtkAdjustment *vadj;
-
-		vadj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (sw));
-
-		if (vadj->value + vadj->page_size / 2 < vadj->upper - vadj->page_size) {
-			return FALSE;
-		}
+	static GType type = 0;
+	
+	if (!type) {
+		static const GTypeInfo type_info = {
+			sizeof (EmpathyChatViewIface),
+			chat_view_base_init,
+			NULL,
+		};
+		
+		type = g_type_register_static (G_TYPE_INTERFACE,
+					       "EmpathyChatView",
+					       &type_info, 0);
+		
+		g_type_interface_add_prerequisite (type, G_TYPE_OBJECT);
 	}
-
-	return TRUE;
+	
+	return type;
 }
 
 static void
-chat_view_maybe_trim_buffer (EmpathyChatView *view)
+chat_view_base_init (gpointer klass)
 {
-	EmpathyChatViewPriv *priv;
-	GtkTextIter         top, bottom;
-	gint                line;
-	gint                remove;
-	GtkTextTagTable    *table;
-	GtkTextTag         *tag;
-
-	priv = GET_PRIV (view);
-
-	gtk_text_buffer_get_end_iter (priv->buffer, &bottom);
-	line = gtk_text_iter_get_line (&bottom);
-	if (line < MAX_LINES) {
-		return;
-	}
-
-	remove = line - MAX_LINES;
-	gtk_text_buffer_get_start_iter (priv->buffer, &top);
-
-	bottom = top;
-	if (!gtk_text_iter_forward_lines (&bottom, remove)) {
-		return;
-	}
-
-	/* Track backwords to a place where we can safely cut, we don't do it in
-	 * the middle of a tag.
-	 */
-	table = gtk_text_buffer_get_tag_table (priv->buffer);
-	tag = gtk_text_tag_table_lookup (table, "cut");
-	if (!tag) {
-		return;
-	}
-
-	if (!gtk_text_iter_forward_to_tag_toggle (&bottom, tag)) {
-		return;
-	}
-
-	if (!gtk_text_iter_equal (&top, &bottom)) {
-		gtk_text_buffer_delete (priv->buffer, &top, &bottom);
+	static gboolean initialized = FALSE;
+	
+	if (!initialized) {
+		initialized = TRUE;
 	}
 }
 
-static void
-chat_view_theme_changed_cb (EmpathyThemeManager *manager,
-			    EmpathyChatView     *view)
-{
-	EmpathyChatViewPriv *priv;
-	gboolean            show_avatars = FALSE;
-
-	priv = GET_PRIV (view);
-
-	empathy_theme_manager_apply_saved (manager, view);
-
-	/* Needed for now to update the "rise" property of the names to get it
-	 * vertically centered.
-	 */
-	empathy_conf_get_bool (empathy_conf_get (),
-			       EMPATHY_PREFS_UI_SHOW_AVATARS,
-			       &show_avatars);
-	empathy_theme_set_show_avatars (priv->theme, show_avatars);
-}
-
 /* Pads a pixbuf to the specified size, by centering it in a larger transparent
  * pixbuf. Returns a new ref.
  */
@@ -733,64 +167,13 @@ empathy_chat_view_get_avatar_pixbuf_with_cache (EmpathyContact *contact)
 	return data->pixbuf;
 }
 
-EmpathyChatView *
-empathy_chat_view_new (void)
-{
-	return g_object_new (EMPATHY_TYPE_CHAT_VIEW, NULL);
-}
-
-/* Code stolen from pidgin/gtkimhtml.c */
-static gboolean
-chat_view_scroll_cb (EmpathyChatView *view)
-{
-	EmpathyChatViewPriv *priv;
-	GtkAdjustment      *adj;
-	gdouble             max_val;
-
-	priv = GET_PRIV (view);
-	adj = GTK_TEXT_VIEW (view)->vadjustment;
-	max_val = adj->upper - adj->page_size;
-
-	g_return_val_if_fail (priv->scroll_time != NULL, FALSE);
-
-	if (g_timer_elapsed (priv->scroll_time, NULL) > MAX_SCROLL_TIME) {
-		/* time's up. jump to the end and kill the timer */
-		gtk_adjustment_set_value (adj, max_val);
-		g_timer_destroy (priv->scroll_time);
-		priv->scroll_time = NULL;
-		priv->scroll_timeout = 0;
-		return FALSE;
-	}
-
-	/* scroll by 1/3rd the remaining distance */
-	gtk_adjustment_set_value (adj, gtk_adjustment_get_value (adj) + ((max_val - gtk_adjustment_get_value (adj)) / 3));
-	return TRUE;
-}
-
 void
 empathy_chat_view_scroll_down (EmpathyChatView *view)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	priv = GET_PRIV (view);
-
-	if (!priv->allow_scrolling) {
-		return;
-	}
-
-	DEBUG ("Scrolling down");
-
-	if (priv->scroll_time) {
-		g_timer_reset (priv->scroll_time);
-	} else {
-		priv->scroll_time = g_timer_new();
-	}
-	if (!priv->scroll_timeout) {
-		priv->scroll_timeout = g_timeout_add (SCROLL_DELAY,
-						      (GSourceFunc) chat_view_scroll_cb,
-						      view);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->scroll_down) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->scroll_down (view);
 	}
 }
 
@@ -798,464 +181,123 @@ void
 empathy_chat_view_append_message (EmpathyChatView *view,
 				  EmpathyMessage  *msg)
 {
-	EmpathyChatViewPriv *priv = GET_PRIV (view);
-	gboolean             bottom;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-	g_return_if_fail (EMPATHY_IS_MESSAGE (msg));
-
-	if (!empathy_message_get_body (msg)) {
-		return;
-	}
-
-	bottom = chat_view_is_scrolled_down (view);
 	
-	chat_view_maybe_trim_buffer (view);
-
-	empathy_theme_append_message (priv->theme, view, msg);
-
-	if (bottom) {
-		empathy_chat_view_scroll_down (view);
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_message) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_message (view, 
+									 msg);
 	}
-
-	if (priv->last_contact) {
-		g_object_unref (priv->last_contact);
-	}
-	priv->last_contact = g_object_ref (empathy_message_get_sender (msg));
 }
 
 void
 empathy_chat_view_append_event (EmpathyChatView *view,
-			       const gchar    *str)
+				const gchar    *str)
 {
-	EmpathyChatViewPriv *priv;
-	gboolean            bottom;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-	g_return_if_fail (!G_STR_EMPTY (str));
-
-	priv = GET_PRIV (view);
-
-	bottom = chat_view_is_scrolled_down (view);
-
-	chat_view_maybe_trim_buffer (view);
-
-	empathy_theme_append_event (priv->theme, view, str);
-
-	if (bottom) {
-		empathy_chat_view_scroll_down (view);
-	}
-
-	if (priv->last_contact) {
-		g_object_unref (priv->last_contact);
-		priv->last_contact = NULL;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_event) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_event (view,
+								       str);
 	}
 }
 
 void
 empathy_chat_view_append_button (EmpathyChatView *view,
-				const gchar    *message,
-				GtkWidget      *button1,
-				GtkWidget      *button2)
+				 const gchar    *message,
+				 GtkWidget      *button1,
+				 GtkWidget      *button2)
 {
-	EmpathyChatViewPriv   *priv;
-	GtkTextChildAnchor   *anchor;
-	GtkTextIter           iter;
-	gboolean              bottom;
-	const gchar          *tag;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-	g_return_if_fail (button1 != NULL);
-
-	priv = GET_PRIV (view);
-
-	tag = "invite";
-
-	bottom = chat_view_is_scrolled_down (view);
-
-	empathy_theme_append_timestamp (priv->theme, view, NULL, TRUE, TRUE);
-
-	if (message) {
-		empathy_theme_append_text (priv->theme, view, message, tag, NULL);
-	}
-
-	gtk_text_buffer_get_end_iter (priv->buffer, &iter);
-
-	anchor = gtk_text_buffer_create_child_anchor (priv->buffer, &iter);
-	gtk_text_view_add_child_at_anchor (GTK_TEXT_VIEW (view), button1, anchor);
-	gtk_widget_show (button1);
-
-	gtk_text_buffer_insert_with_tags_by_name (priv->buffer,
-						  &iter,
-						  " ",
-						  1,
-						  tag,
-						  NULL);
-
-	if (button2) {
-		gtk_text_buffer_get_end_iter (priv->buffer, &iter);
-		
-		anchor = gtk_text_buffer_create_child_anchor (priv->buffer, &iter);
-		gtk_text_view_add_child_at_anchor (GTK_TEXT_VIEW (view), button2, anchor);
-		gtk_widget_show (button2);
-		
-		gtk_text_buffer_insert_with_tags_by_name (priv->buffer,
-							  &iter,
-							  " ",
-							  1,
-							  tag,
-							  NULL);
-	}
-
-	gtk_text_buffer_get_end_iter (priv->buffer, &iter);
-	gtk_text_buffer_insert_with_tags_by_name (priv->buffer,
-						  &iter,
-						  "\n\n",
-						  2,
-						  tag,
-						  NULL);
-
-	if (bottom) {
-		empathy_chat_view_scroll_down (view);
-	}
-
-	if (priv->last_contact) {
-		g_object_unref (priv->last_contact);
-		priv->last_contact = NULL;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_button) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->append_button (view, 
+									message,
+									button1,
+									button2);
 	}
 }
 
 void
 empathy_chat_view_scroll (EmpathyChatView *view,
-			 gboolean        allow_scrolling)
+			  gboolean        allow_scrolling)
 {
-	EmpathyChatViewPriv *priv = GET_PRIV (view);
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	DEBUG ("Scrolling %s", allow_scrolling ? "enabled" : "disabled");
-
-	priv->allow_scrolling = allow_scrolling;
-	if (allow_scrolling) {
-		empathy_chat_view_scroll_down (view);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->scroll) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->scroll (view, 
+								 allow_scrolling);
 	}
 }
 
 gboolean
 empathy_chat_view_get_selection_bounds (EmpathyChatView *view,
-				       GtkTextIter    *start,
-				       GtkTextIter    *end)
+					GtkTextIter    *start,
+					GtkTextIter    *end)
 {
-	GtkTextBuffer *buffer;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), FALSE);
-
-	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
-
-	return gtk_text_buffer_get_selection_bounds (buffer, start, end);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_selection_bounds) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_selection_bounds (view, 
+										      start, 
+										      end);
+	}
+	return FALSE;
 }
 
 void
 empathy_chat_view_clear (EmpathyChatView *view)
 {
-	GtkTextBuffer      *buffer;
-	EmpathyChatViewPriv *priv;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
-	gtk_text_buffer_set_text (buffer, "", -1);
-
-	/* We set these back to the initial values so we get
-	 * timestamps when clearing the window to know when
-	 * conversations start.
-	 */
-	priv = GET_PRIV (view);
-
-	priv->last_timestamp = 0;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->clear) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->clear (view);
+	}
 }
 
 gboolean
 empathy_chat_view_find_previous (EmpathyChatView *view,
-				const gchar    *search_criteria,
-				gboolean        new_search)
+				 const gchar    *search_criteria,
+				 gboolean        new_search)
 {
-	EmpathyChatViewPriv *priv;
-	GtkTextBuffer      *buffer;
-	GtkTextIter         iter_at_mark;
-	GtkTextIter         iter_match_start;
-	GtkTextIter         iter_match_end;
-	gboolean            found;
-	gboolean            from_start = FALSE;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), FALSE);
-	g_return_val_if_fail (search_criteria != NULL, FALSE);
-
-	priv = GET_PRIV (view);
-
-	buffer = priv->buffer;
-
-	if (G_STR_EMPTY (search_criteria)) {
-		if (priv->find_mark_previous) {
-			gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
-
-			gtk_text_buffer_move_mark (buffer,
-						   priv->find_mark_previous,
-						   &iter_at_mark);
-			gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
-						      priv->find_mark_previous,
-						      0.0,
-						      TRUE,
-						      0.0,
-						      0.0);
-			gtk_text_buffer_select_range (buffer,
-						      &iter_at_mark,
-						      &iter_at_mark);
-		}
-
-		return FALSE;
-	}
-
-	if (new_search) {
-		from_start = TRUE;
-	}
-
-	if (priv->find_mark_previous) {
-		gtk_text_buffer_get_iter_at_mark (buffer,
-						  &iter_at_mark,
-						  priv->find_mark_previous);
-	} else {
-		gtk_text_buffer_get_end_iter (buffer, &iter_at_mark);
-		from_start = TRUE;
-	}
-
-	priv->find_last_direction = FALSE;
-
-	found = empathy_text_iter_backward_search (&iter_at_mark,
-						  search_criteria,
-						  &iter_match_start,
-						  &iter_match_end,
-						  NULL);
-
-	if (!found) {
-		gboolean result = FALSE;
-
-		if (from_start) {
-			return result;
-		}
-
-		/* Here we wrap around. */
-		if (!new_search && !priv->find_wrapped) {
-			priv->find_wrapped = TRUE;
-			result = empathy_chat_view_find_previous (view, 
-								 search_criteria, 
-								 FALSE);
-			priv->find_wrapped = FALSE;
-		}
-
-		return result;
-	}
-
-	/* Set new mark and show on screen */
-	if (!priv->find_mark_previous) {
-		priv->find_mark_previous = gtk_text_buffer_create_mark (buffer, NULL,
-									&iter_match_start,
-									TRUE);
-	} else {
-		gtk_text_buffer_move_mark (buffer,
-					   priv->find_mark_previous,
-					   &iter_match_start);
-	}
-
-	if (!priv->find_mark_next) {
-		priv->find_mark_next = gtk_text_buffer_create_mark (buffer, NULL,
-								    &iter_match_end,
-								    TRUE);
-	} else {
-		gtk_text_buffer_move_mark (buffer,
-					   priv->find_mark_next,
-					   &iter_match_end);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_previous) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_previous (view, 
+									       search_criteria, 
+									       new_search);
 	}
-
-	gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
-				      priv->find_mark_previous,
-				      0.0,
-				      TRUE,
-				      0.5,
-				      0.5);
-
-	gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &iter_match_start);
-	gtk_text_buffer_move_mark_by_name (buffer, "insert", &iter_match_end);
-
-	return TRUE;
+	return FALSE;
 }
 
 gboolean
 empathy_chat_view_find_next (EmpathyChatView *view,
-			    const gchar    *search_criteria,
-			    gboolean        new_search)
+			     const gchar    *search_criteria,
+			     gboolean        new_search)
 {
-	EmpathyChatViewPriv *priv;
-	GtkTextBuffer      *buffer;
-	GtkTextIter         iter_at_mark;
-	GtkTextIter         iter_match_start;
-	GtkTextIter         iter_match_end;
-	gboolean            found;
-	gboolean            from_start = FALSE;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), FALSE);
-	g_return_val_if_fail (search_criteria != NULL, FALSE);
-
-	priv = GET_PRIV (view);
-
-	buffer = priv->buffer;
-
-	if (G_STR_EMPTY (search_criteria)) {
-		if (priv->find_mark_next) {
-			gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
-
-			gtk_text_buffer_move_mark (buffer,
-						   priv->find_mark_next,
-						   &iter_at_mark);
-			gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
-						      priv->find_mark_next,
-						      0.0,
-						      TRUE,
-						      0.0,
-						      0.0);
-			gtk_text_buffer_select_range (buffer,
-						      &iter_at_mark,
-						      &iter_at_mark);
-		}
-
-		return FALSE;
-	}
-
-	if (new_search) {
-		from_start = TRUE;
-	}
-
-	if (priv->find_mark_next) {
-		gtk_text_buffer_get_iter_at_mark (buffer,
-						  &iter_at_mark,
-						  priv->find_mark_next);
-	} else {
-		gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
-		from_start = TRUE;
-	}
-
-	priv->find_last_direction = TRUE;
-
-	found = empathy_text_iter_forward_search (&iter_at_mark,
-						 search_criteria,
-						 &iter_match_start,
-						 &iter_match_end,
-						 NULL);
-
-	if (!found) {
-		gboolean result = FALSE;
-
-		if (from_start) {
-			return result;
-		}
-
-		/* Here we wrap around. */
-		if (!new_search && !priv->find_wrapped) {
-			priv->find_wrapped = TRUE;
-			result = empathy_chat_view_find_next (view, 
-							     search_criteria, 
-							     FALSE);
-			priv->find_wrapped = FALSE;
-		}
-
-		return result;
-	}
-
-	/* Set new mark and show on screen */
-	if (!priv->find_mark_next) {
-		priv->find_mark_next = gtk_text_buffer_create_mark (buffer, NULL,
-							       &iter_match_end,
-							       TRUE);
-	} else {
-		gtk_text_buffer_move_mark (buffer,
-					   priv->find_mark_next,
-					   &iter_match_end);
-	}
-
-	if (!priv->find_mark_previous) {
-		priv->find_mark_previous = gtk_text_buffer_create_mark (buffer, NULL,
-									&iter_match_start,
-									TRUE);
-	} else {
-		gtk_text_buffer_move_mark (buffer,
-					   priv->find_mark_previous,
-					   &iter_match_start);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_next) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_next (view, 
+									   search_criteria, 
+									   new_search);
 	}
-
-	gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
-				      priv->find_mark_next,
-				      0.0,
-				      TRUE,
-				      0.5,
-				      0.5);
-
-	gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &iter_match_start);
-	gtk_text_buffer_move_mark_by_name (buffer, "insert", &iter_match_end);
-
-	return TRUE;
+	return FALSE;
 }
 
 
 void
 empathy_chat_view_find_abilities (EmpathyChatView *view,
-				 const gchar    *search_criteria,
-				 gboolean       *can_do_previous,
-				 gboolean       *can_do_next)
+				  const gchar    *search_criteria,
+				  gboolean       *can_do_previous,
+				  gboolean       *can_do_next)
 {
-	EmpathyChatViewPriv *priv;
-	GtkTextBuffer      *buffer;
-	GtkTextIter         iter_at_mark;
-	GtkTextIter         iter_match_start;
-	GtkTextIter         iter_match_end;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-	g_return_if_fail (search_criteria != NULL);
-	g_return_if_fail (can_do_previous != NULL && can_do_next != NULL);
-
-	priv = GET_PRIV (view);
-
-	buffer = priv->buffer;
-
-	if (can_do_previous) {
-		if (priv->find_mark_previous) {
-			gtk_text_buffer_get_iter_at_mark (buffer,
-							  &iter_at_mark,
-							  priv->find_mark_previous);
-		} else {
-			gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
-		}
-		
-		*can_do_previous = empathy_text_iter_backward_search (&iter_at_mark,
-								     search_criteria,
-								     &iter_match_start,
-								     &iter_match_end,
-								     NULL);
-	}
-
-	if (can_do_next) {
-		if (priv->find_mark_next) {
-			gtk_text_buffer_get_iter_at_mark (buffer,
-							  &iter_at_mark,
-							  priv->find_mark_next);
-		} else {
-			gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
-		}
-		
-		*can_do_next = empathy_text_iter_forward_search (&iter_at_mark,
-								search_criteria,
-								&iter_match_start,
-								&iter_match_end,
-								NULL);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_abilities) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->find_abilities (view, 
+									 search_criteria, 
+									 can_do_previous, 
+									 can_do_next);
 	}
 }
 
@@ -1263,124 +305,53 @@ void
 empathy_chat_view_highlight (EmpathyChatView *view,
 			     const gchar     *text)
 {
-	GtkTextBuffer *buffer;
-	GtkTextIter    iter;
-	GtkTextIter    iter_start;
-	GtkTextIter    iter_end;
-	GtkTextIter    iter_match_start;
-	GtkTextIter    iter_match_end;
-	gboolean       found;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
-
-	gtk_text_buffer_get_start_iter (buffer, &iter);
-
-	gtk_text_buffer_get_bounds (buffer, &iter_start, &iter_end);
-	gtk_text_buffer_remove_tag_by_name (buffer, "highlight",
-					    &iter_start,
-					    &iter_end);
-
-	if (G_STR_EMPTY (text)) {
-		return;
-	}
-
-	while (1) {
-		found = empathy_text_iter_forward_search (&iter,
-							 text,
-							 &iter_match_start,
-							 &iter_match_end,
-							 NULL);
-
-		if (!found) {
-			break;
-		}
-
-		gtk_text_buffer_apply_tag_by_name (buffer, "highlight",
-						   &iter_match_start,
-						   &iter_match_end);
-
-		iter = iter_match_end;
-		gtk_text_iter_forward_char (&iter);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->highlight) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->highlight (view, text);
 	}
 }
 
 void
 empathy_chat_view_copy_clipboard (EmpathyChatView *view)
 {
-	GtkTextBuffer *buffer;
-	GtkClipboard  *clipboard;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
-	clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
-
-	gtk_text_buffer_copy_clipboard (buffer, clipboard);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->copy_clipboard) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->copy_clipboard (view);
+	}
 }
 
 EmpathyTheme *
 empathy_chat_view_get_theme (EmpathyChatView *view)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), NULL);
-
-	priv = GET_PRIV (view);
-
-	return priv->theme;
-}
-
-static void
-chat_view_theme_notify_cb (EmpathyTheme    *theme,
-			   GParamSpec      *param,
-			   EmpathyChatView *view)
-{
-	empathy_theme_update_view (theme, view);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_theme) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_theme (view);
+	}
+	return NULL;
 }
 
 void
 empathy_chat_view_set_theme (EmpathyChatView *view, EmpathyTheme *theme)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-	g_return_if_fail (EMPATHY_IS_THEME (theme));
-
-	priv = GET_PRIV (view);
-
-	if (priv->theme) {
-		g_signal_handlers_disconnect_by_func (priv->theme,
-						      chat_view_theme_notify_cb,
-						      view);
-		g_object_unref (priv->theme);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_theme) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_theme (view, theme);
 	}
-
-	priv->theme = g_object_ref (theme);
-
-	empathy_theme_update_view (theme, view);
-	g_signal_connect (priv->theme, "notify",
-			  G_CALLBACK (chat_view_theme_notify_cb),
-			  view);
-
-	/* FIXME: Redraw all messages using the new theme */
 }
 
 void
 empathy_chat_view_set_margin (EmpathyChatView *view,
-			     gint            margin)
+			      gint            margin)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	priv = GET_PRIV (view);
-
-	g_object_set (view,
-		      "left-margin", margin,
-		      "right-margin", margin,
-		      NULL);
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_margin) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_margin (view, margin);
+	}
 }
 
 GtkWidget *
@@ -1435,37 +406,33 @@ empathy_chat_view_get_smiley_menu (GCallback    callback,
 time_t
 empathy_chat_view_get_last_timestamp (EmpathyChatView *view)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), 0);
-
-	priv = GET_PRIV (view);
-
-	return priv->last_timestamp;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_last_timestamp) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_last_timestamp (view);
+	}
+	return 0;
 }
 
 void
 empathy_chat_view_set_last_timestamp (EmpathyChatView *view,
-				     time_t          timestamp)
+				      time_t          timestamp)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_if_fail (EMPATHY_IS_CHAT_VIEW (view));
-
-	priv = GET_PRIV (view);
-
-	priv->last_timestamp = timestamp;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_last_timestamp) {
+		EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->set_last_timestamp (view, timestamp);
+	}
 }
 
 EmpathyContact *
 empathy_chat_view_get_last_contact (EmpathyChatView *view)
 {
-	EmpathyChatViewPriv *priv;
-
 	g_return_val_if_fail (EMPATHY_IS_CHAT_VIEW (view), NULL);
-
-	priv = GET_PRIV (view);
-
-	return priv->last_contact;
+	
+	if (EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_last_contact) {
+		return EMPATHY_TYPE_CHAT_VIEW_GET_IFACE (view)->get_last_contact (view);
+	}
+	return NULL;
 }