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 static GObjectClass *parent_class = NULL;
  46
  47 G_DEFINE_TYPE (EvNavigationAction, ev_navigation_action, GTK_TYPE_ACTION)
  48
  49 #define MAX_LABEL_LENGTH 48
  50
  51 #define EV_NAVIGATION_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_NAVIGATION_ACTION, EvNavigationActionPrivate))
  52
  53 void
  54 ev_navigation_action_set_history (EvNavigationAction *action,
  55                                   EvHistory          *history)
  56 {
  57         action->priv->history = history;
  58
  59         g_object_add_weak_pointer (G_OBJECT (action->priv->history),
  60                                    (gpointer *) &action->priv->history);
  61 }
  62
  63 void
  64 ev_navigation_action_set_window (EvNavigationAction *action,
  65                                  EvWindow           *window)
  66 {
  67         action->priv->window = window;
  68 }
  69
  70 static void
  71 activate_menu_item_cb (GtkWidget *widget, EvNavigationAction *action)
  72 {
  73         int index;
  74
  75         g_return_if_fail (EV_IS_HISTORY (action->priv->history));
  76
  77         index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget), "index"));
  78         ev_history_set_current_index (action->priv->history, index);
  79
  80         if (action->priv->window) {
  81                 EvLink *link;
  82                 EvLinkAction *link_action;
  83                 EvLinkDest *dest;
  84
  85                 link = ev_history_get_link_nth (action->priv->history, index);
  86                 link_action = ev_link_get_action (link);
  87                 dest = ev_link_action_get_dest (link_action);
  88
  89                 ev_window_goto_dest (action->priv->window, dest);
  90         }
  91 }
  92
  93 static GtkWidget *
  94 new_history_menu_item (EvNavigationAction *action,
  95                        EvLink             *link,
  96                        int                 index)
  97 {
  98         GtkLabel *label;
  99         GtkWidget *item;
 100         const char *title;
 101
 102         title = ev_link_get_title (link);
 103         item = gtk_image_menu_item_new_with_label (title);
 104         g_object_set_data (G_OBJECT (item), "index",
 105                            GINT_TO_POINTER (index));
 106
 107         label = GTK_LABEL (GTK_BIN (item)->child);
 108         gtk_label_set_ellipsize (label, PANGO_ELLIPSIZE_END);
 109         gtk_label_set_max_width_chars (label, MAX_LABEL_LENGTH);
 110
 111         g_signal_connect (item, "activate",
 112                           G_CALLBACK (activate_menu_item_cb),
 113                           action);
 114
 115         gtk_widget_show (item);
 116
 117         return item;
 118 }
 119
 120 static GtkWidget *
 121 new_empty_history_menu_item (EvNavigationAction *action)
 122 {
 123         GtkWidget *item;
 124
 125         item = gtk_image_menu_item_new_with_label (_("Empty"));
 126         gtk_widget_set_sensitive (item, FALSE);
 127         gtk_widget_show (item);
 128
 129         return item;
 130 }
 131
 132 static GtkWidget *
 133 build_menu (EvNavigationAction *action)
 134 {
 135         GtkMenuShell *menu;
 136         GtkWidget *item;
 137         EvLink *link;
 138         EvHistory *history = action->priv->history;
 139         int start, end, i;
 140
 141         menu = GTK_MENU_SHELL (gtk_menu_new ());
 142
 143         if (history == NULL || ev_history_get_n_links (history) <= 0) {
 144                 item = new_empty_history_menu_item (action);
 145                 gtk_menu_shell_append (menu, item);
 146                 return GTK_WIDGET (menu);
 147         }
 148
 149         start = 0;
 150         end = ev_history_get_n_links (history);
 151
 152         for (i = start; i < end; i++) {
 153                 link = ev_history_get_link_nth (history, i);
 154                 item = new_history_menu_item (action, link, i);
 155                 gtk_menu_shell_append (menu, item);
 156         }
 157
 158         return GTK_WIDGET (menu);
 159 }
 160
 161 static void
 162 menu_activated_cb (EvNavigationActionWidget *button,
 163                    EvNavigationAction *action)
 164 {
 165         GtkWidget *menu;
 166
 167         menu = build_menu (action);
 168         ev_navigation_action_widget_set_menu (button, menu);
 169 }
 170
 171 static void
 172 connect_proxy (GtkAction *action, GtkWidget *proxy)
 173 {
 174         GtkWidget *menu;
 175
 176         /* set dummy menu so the arrow gets sensitive */
 177         menu = gtk_menu_new ();
 178         ev_navigation_action_widget_set_menu (EV_NAVIGATION_ACTION_WIDGET (proxy), menu);
 179
 180         g_signal_connect (proxy, "show-menu",
 181                           G_CALLBACK (menu_activated_cb), action);
 182
 183         GTK_ACTION_CLASS (parent_class)->connect_proxy (action, proxy);
 184 }
 185
 186 static GtkWidget *
 187 create_tool_item (GtkAction *action)
 188 {
 189         EvNavigationActionWidget *proxy;
 190
 191         proxy = g_object_new (EV_TYPE_NAVIGATION_ACTION_WIDGET, NULL);
 192         gtk_widget_show (GTK_WIDGET (proxy));
 193
 194         return GTK_WIDGET (proxy);
 195 }
 196
 197 static void
 198 ev_navigation_action_init (EvNavigationAction *action)
 199 {
 200         action->priv = EV_NAVIGATION_ACTION_GET_PRIVATE (action);
 201 }
 202
 203 static void
 204 ev_navigation_action_finalize (GObject *object)
 205 {
 206         EvNavigationAction *action = EV_NAVIGATION_ACTION (object);
 207
 208         if (action->priv->history) {
 209                 g_object_add_weak_pointer (G_OBJECT (action->priv->history),
 210                                            (gpointer *) &action->priv->history);
 211         }
 212
 213         parent_class->finalize (object);
 214 }
 215
 216 static void
 217 ev_navigation_action_class_init (EvNavigationActionClass *class)
 218 {
 219         GObjectClass *object_class = G_OBJECT_CLASS (class);
 220         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 221
 222         object_class->finalize = ev_navigation_action_finalize;
 223         parent_class = g_type_class_peek_parent (class);
 224
 225         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
 226         action_class->create_tool_item = create_tool_item;
 227         action_class->connect_proxy = connect_proxy;
 228
 229         g_type_class_add_private (object_class, sizeof (EvNavigationActionPrivate));
 230 }