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 <glib/gi18n.h>
  24 #include <gtk/gtk.h>
  25
  26 #include "ev-navigation-action.h"
  27 #include "ev-navigation-action-widget.h"
  28
  29 enum
  30 {
  31         WIDGET_ACTIVATE_LINK,
  32         WIDGET_N_SIGNALS
  33 };
  34
  35 static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
  36
  37 struct _EvNavigationActionPrivate
  38 {
  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 static void
  52 ev_navigation_action_history_changed (EvHistory *history,
  53                                       gpointer data)
  54 {
  55         EvNavigationAction *action = EV_NAVIGATION_ACTION (data);
  56
  57         gtk_action_set_sensitive (GTK_ACTION (action),
  58                                   ev_history_get_n_links (history) > 0);
  59 }
  60
  61 void
  62 ev_navigation_action_set_history (EvNavigationAction *action,
  63                                   EvHistory          *history)
  64 {
  65         action->priv->history = history;
  66
  67         g_object_add_weak_pointer (G_OBJECT (action->priv->history),
  68                                    (gpointer) &action->priv->history);
  69
  70         g_signal_connect_object (history, "changed",
  71                                  G_CALLBACK (ev_navigation_action_history_changed),
  72                                  action, 0);
  73 }
  74
  75 static void
  76 activate_menu_item_cb (GtkWidget *widget, EvNavigationAction *action)
  77 {
  78         int index;
  79
  80         g_return_if_fail (EV_IS_HISTORY (action->priv->history));
  81
  82         index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget), "index"));
  83
  84         if (action->priv->history) {
  85                 EvLink *link;
  86
  87                 link = ev_history_get_link_nth (action->priv->history, index);
  88
  89                 g_signal_emit (action, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
  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         gtk_label_set_use_markup (GTK_LABEL (gtk_bin_get_child (GTK_BIN (item))), TRUE);
 105         g_object_set_data (G_OBJECT (item), "index",
 106                            GINT_TO_POINTER (index));
 107
 108         label = GTK_LABEL (GTK_BIN (item)->child);
 109         gtk_label_set_ellipsize (label, PANGO_ELLIPSIZE_END);
 110         gtk_label_set_max_width_chars (label, MAX_LABEL_LENGTH);
 111
 112         g_signal_connect (item, "activate",
 113                           G_CALLBACK (activate_menu_item_cb),
 114                           action);
 115
 116         gtk_widget_show (item);
 117
 118         return item;
 119 }
 120
 121 static GtkWidget *
 122 build_menu (EvNavigationAction *action)
 123 {
 124         GtkMenuShell *menu;
 125         GtkWidget *item;
 126         EvLink *link;
 127         EvHistory *history = action->priv->history;
 128         int start, end, i;
 129
 130         if (history == NULL || ev_history_get_n_links (history) <= 0) {
 131                 return NULL;
 132         }
 133
 134         menu = GTK_MENU_SHELL (gtk_menu_new ());
 135
 136         start = 0;
 137         end = ev_history_get_n_links (history);
 138
 139         for (i = start; i < end; i++) {
 140                 link = ev_history_get_link_nth (history, i);
 141                 item = new_history_menu_item (action, link, i);
 142                 gtk_menu_shell_prepend (menu, item);
 143         }
 144
 145         return GTK_WIDGET (menu);
 146 }
 147
 148 static void
 149 menu_activated_cb (EvNavigationActionWidget *button,
 150                    EvNavigationAction *action)
 151 {
 152         GtkWidget *menu;
 153
 154         menu = build_menu (action);
 155         ev_navigation_action_widget_set_menu (button, menu);
 156 }
 157
 158 static void
 159 connect_proxy (GtkAction *action, GtkWidget *proxy)
 160 {
 161         GtkWidget *menu;
 162
 163         if (GTK_IS_TOOL_ITEM (proxy)) {
 164                 /* set dummy menu so the arrow gets sensitive */
 165                 menu = gtk_menu_new ();
 166                 ev_navigation_action_widget_set_menu (EV_NAVIGATION_ACTION_WIDGET (proxy), menu);
 167
 168                 g_signal_connect (proxy, "show-menu",
 169                                   G_CALLBACK (menu_activated_cb), action);
 170         }
 171
 172         GTK_ACTION_CLASS (ev_navigation_action_parent_class)->connect_proxy (action, proxy);
 173 }
 174
 175 static GtkWidget *
 176 create_tool_item (GtkAction *action)
 177 {
 178         EvNavigationActionWidget *proxy;
 179
 180         proxy = g_object_new (EV_TYPE_NAVIGATION_ACTION_WIDGET, NULL);
 181         gtk_widget_show (GTK_WIDGET (proxy));
 182
 183         return GTK_WIDGET (proxy);
 184 }
 185
 186 static GtkWidget *
 187 create_menu_item (GtkAction *action)
 188 {
 189         GtkWidget *menu;
 190         GtkWidget *menu_item;
 191
 192         menu = build_menu (EV_NAVIGATION_ACTION (action));
 193
 194         menu_item = GTK_ACTION_CLASS (ev_navigation_action_parent_class)->create_menu_item (action);
 195
 196         gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), menu);
 197
 198         gtk_widget_show (menu_item);
 199
 200         return menu_item;
 201 }
 202
 203 static void
 204 ev_navigation_action_init (EvNavigationAction *action)
 205 {
 206         action->priv = EV_NAVIGATION_ACTION_GET_PRIVATE (action);
 207 }
 208
 209 static void
 210 ev_navigation_action_finalize (GObject *object)
 211 {
 212         EvNavigationAction *action = EV_NAVIGATION_ACTION (object);
 213
 214         if (action->priv->history) {
 215                 g_object_remove_weak_pointer (G_OBJECT (action->priv->history),
 216                                              (gpointer) &action->priv->history);
 217                 action->priv->history = NULL;
 218         }
 219
 220         G_OBJECT_CLASS (ev_navigation_action_parent_class)->finalize (object);
 221 }
 222
 223 static void
 224 ev_navigation_action_class_init (EvNavigationActionClass *class)
 225 {
 226         GObjectClass *object_class = G_OBJECT_CLASS (class);
 227         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 228
 229         object_class->finalize = ev_navigation_action_finalize;
 230
 231         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
 232         action_class->create_tool_item = create_tool_item;
 233         action_class->connect_proxy = connect_proxy;
 234         action_class->create_menu_item = create_menu_item;
 235
 236         widget_signals[WIDGET_ACTIVATE_LINK] = g_signal_new ("activate_link",
 237                                                G_OBJECT_CLASS_TYPE (object_class),
 238                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 239                                                G_STRUCT_OFFSET (EvNavigationActionClass, activate_link),
 240                                                NULL, NULL,
 241                                                g_cclosure_marshal_VOID__OBJECT,
 242                                                G_TYPE_NONE, 1,
 243                                                G_TYPE_OBJECT);
 244
 245         g_type_class_add_private (object_class, sizeof (EvNavigationActionPrivate));
 246 }