shell/ev-navigation-action.c

   1 /*
   2  *  Copyright (C) 2003, 2004 Marco Pesenti Gritti
   3  *  Copyright (C) 2003, 2004 Christian Persch
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  *
  19  */
  20
  21 #include "config.h"
  22
  23 #include "ev-navigation-action.h"
  24 #include "ev-navigation-action-widget.h"
  25 #include "ev-window.h"
  26
  27 #include <gtk/gtklabel.h>
  28 #include <gtk/gtkimage.h>
  29 #include <gtk/gtkmenuitem.h>
  30 #include <gtk/gtkimagemenuitem.h>
  31 #include <gtk/gtkmenushell.h>
  32 #include <gtk/gtkmenu.h>
  33 #include <gtk/gtkmenutoolbutton.h>
  34 #include <glib/gi18n.h>
  35
  36 struct _EvNavigationActionPrivate
  37 {
  38         EvWindow *window;
  39         EvHistory *history;
  40 };
  41
  42 static void ev_navigation_action_init       (EvNavigationAction *action);
  43 static void ev_navigation_action_class_init (EvNavigationActionClass *class);
  44
  45 G_DEFINE_TYPE (EvNavigationAction, ev_navigation_action, GTK_TYPE_ACTION)
  46
  47 #define MAX_LABEL_LENGTH 48
  48
  49 #define EV_NAVIGATION_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_NAVIGATION_ACTION, EvNavigationActionPrivate))
  50
  51 void
  52 ev_navigation_action_set_history (EvNavigationAction *action,
  53                                   EvHistory          *history)
  54 {
  55         action->priv->history = history;
  56
  57         g_object_add_weak_pointer (G_OBJECT (action->priv->history),
  58                                    (gpointer *) &action->priv->history);
  59 }
  60
  61 void
  62 ev_navigation_action_set_window (EvNavigationAction *action,
  63                                  EvWindow           *window)
  64 {
  65         action->priv->window = window;
  66 }
  67
  68 static void
  69 activate_menu_item_cb (GtkWidget *widget, EvNavigationAction *action)
  70 {
  71         int index;
  72
  73         g_return_if_fail (EV_IS_HISTORY (action->priv->history));
  74
  75         index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget), "index"));
  76         ev_history_set_current_index (action->priv->history, index);
  77
  78         if (action->priv->window) {
  79                 EvLink *link;
  80                 EvLinkAction *link_action;
  81                 EvLinkDest *dest;
  82
  83                 link = ev_history_get_link_nth (action->priv->history, index);
  84                 link_action = ev_link_get_action (link);
  85                 dest = ev_link_action_get_dest (link_action);
  86
  87                 ev_window_goto_dest (action->priv->window, dest);
  88         }
  89 }
  90
  91 static GtkWidget *
  92 new_history_menu_item (EvNavigationAction *action,
  93                        EvLink             *link,
  94                        int                 index)
  95 {
  96         GtkLabel *label;
  97         GtkWidget *item;
  98         const char *title;
  99
 100         title = ev_link_get_title (link);
 101         item = gtk_image_menu_item_new_with_label (title);
 102         g_object_set_data (G_OBJECT (item), "index",
 103                            GINT_TO_POINTER (index));
 104
 105         label = GTK_LABEL (GTK_BIN (item)->child);
 106         gtk_label_set_ellipsize (label, PANGO_ELLIPSIZE_END);
 107         gtk_label_set_max_width_chars (label, MAX_LABEL_LENGTH);
 108
 109         g_signal_connect (item, "activate",
 110                           G_CALLBACK (activate_menu_item_cb),
 111                           action);
 112
 113         gtk_widget_show (item);
 114
 115         return item;
 116 }
 117
 118 static GtkWidget *
 119 new_empty_history_menu_item (EvNavigationAction *action)
 120 {
 121         GtkWidget *item;
 122
 123         item = gtk_image_menu_item_new_with_label (_("Empty"));
 124         gtk_widget_set_sensitive (item, FALSE);
 125         gtk_widget_show (item);
 126
 127         return item;
 128 }
 129
 130 static GtkWidget *
 131 build_menu (EvNavigationAction *action)
 132 {
 133         GtkMenuShell *menu;
 134         GtkWidget *item;
 135         EvLink *link;
 136         EvHistory *history = action->priv->history;
 137         int start, end, i;
 138
 139         menu = GTK_MENU_SHELL (gtk_menu_new ());
 140
 141         if (history == NULL || ev_history_get_n_links (history) <= 0) {
 142                 item = new_empty_history_menu_item (action);
 143                 gtk_menu_shell_append (menu, item);
 144                 return GTK_WIDGET (menu);
 145         }
 146
 147         start = 0;
 148         end = ev_history_get_n_links (history);
 149
 150         for (i = start; i < end; i++) {
 151                 link = ev_history_get_link_nth (history, i);
 152                 item = new_history_menu_item (action, link, i);
 153                 gtk_menu_shell_append (menu, item);
 154         }
 155
 156         return GTK_WIDGET (menu);
 157 }
 158
 159 static void
 160 menu_activated_cb (EvNavigationActionWidget *button,
 161                    EvNavigationAction *action)
 162 {
 163         GtkWidget *menu;
 164
 165         menu = build_menu (action);
 166         ev_navigation_action_widget_set_menu (button, menu);
 167 }
 168
 169 static void
 170 connect_proxy (GtkAction *action, GtkWidget *proxy)
 171 {
 172         GtkWidget *menu;
 173
 174         /* set dummy menu so the arrow gets sensitive */
 175         menu = gtk_menu_new ();
 176         ev_navigation_action_widget_set_menu (EV_NAVIGATION_ACTION_WIDGET (proxy), menu);
 177
 178         g_signal_connect (proxy, "show-menu",
 179                           G_CALLBACK (menu_activated_cb), action);
 180
 181         GTK_ACTION_CLASS (ev_navigation_action_parent_class)->connect_proxy (action, proxy);
 182 }
 183
 184 static GtkWidget *
 185 create_tool_item (GtkAction *action)
 186 {
 187         EvNavigationActionWidget *proxy;
 188
 189         proxy = g_object_new (EV_TYPE_NAVIGATION_ACTION_WIDGET, NULL);
 190         gtk_widget_show (GTK_WIDGET (proxy));
 191
 192         return GTK_WIDGET (proxy);
 193 }
 194
 195 static void
 196 ev_navigation_action_init (EvNavigationAction *action)
 197 {
 198         action->priv = EV_NAVIGATION_ACTION_GET_PRIVATE (action);
 199 }
 200
 201 static void
 202 ev_navigation_action_finalize (GObject *object)
 203 {
 204         EvNavigationAction *action = EV_NAVIGATION_ACTION (object);
 205
 206         if (action->priv->history) {
 207                 g_object_add_weak_pointer (G_OBJECT (action->priv->history),
 208                                            (gpointer *) &action->priv->history);
 209         }
 210
 211         G_OBJECT_CLASS (ev_navigation_action_parent_class)->finalize (object);
 212 }
 213
 214 static void
 215 ev_navigation_action_class_init (EvNavigationActionClass *class)
 216 {
 217         GObjectClass *object_class = G_OBJECT_CLASS (class);
 218         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 219
 220         object_class->finalize = ev_navigation_action_finalize;
 221
 222         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
 223         action_class->create_tool_item = create_tool_item;
 224         action_class->connect_proxy = connect_proxy;
 225
 226         g_type_class_add_private (object_class, sizeof (EvNavigationActionPrivate));
 227 }