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
  26 #include <gtk/gtklabel.h>
  27 #include <gtk/gtkimage.h>
  28 #include <gtk/gtkmenuitem.h>
  29 #include <gtk/gtkimagemenuitem.h>
  30 #include <gtk/gtkmenushell.h>
  31 #include <gtk/gtkmenu.h>
  32 #include <gtk/gtkmenutoolbutton.h>
  33 #include <glib/gi18n.h>
  34
  35 enum
  36 {
  37         WIDGET_ACTIVATE_LINK,
  38         WIDGET_N_SIGNALS
  39 };
  40
  41 static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
  42
  43 struct _EvNavigationActionPrivate
  44 {
  45         EvHistory *history;
  46 };
  47
  48 static void ev_navigation_action_init       (EvNavigationAction *action);
  49 static void ev_navigation_action_class_init (EvNavigationActionClass *class);
  50
  51 G_DEFINE_TYPE (EvNavigationAction, ev_navigation_action, GTK_TYPE_ACTION)
  52
  53 #define MAX_LABEL_LENGTH 48
  54
  55 #define EV_NAVIGATION_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_NAVIGATION_ACTION, EvNavigationActionPrivate))
  56
  57 void
  58 ev_navigation_action_set_history (EvNavigationAction *action,
  59                                   EvHistory          *history)
  60 {
  61         action->priv->history = history;
  62
  63         g_object_add_weak_pointer (G_OBJECT (action->priv->history),
  64                                    (gpointer *) &action->priv->history);
  65 }
  66
  67 static void
  68 activate_menu_item_cb (GtkWidget *widget, EvNavigationAction *action)
  69 {
  70         int index;
  71
  72         g_return_if_fail (EV_IS_HISTORY (action->priv->history));
  73
  74         index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget), "index"));
  75         ev_history_set_current_index (action->priv->history, index);
  76
  77         if (action->priv->history) {
  78                 EvLink *link;
  79
  80                 link = ev_history_get_link_nth (action->priv->history, index);
  81
  82                 g_signal_emit (action, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
  83         }
  84 }
  85
  86 static GtkWidget *
  87 new_history_menu_item (EvNavigationAction *action,
  88                        EvLink             *link,
  89                        int                 index)
  90 {
  91         GtkLabel *label;
  92         GtkWidget *item;
  93         const char *title;
  94
  95         title = ev_link_get_title (link);
  96
  97         if (!title)
  98                 title = _("External link");
  99
 100         item = gtk_image_menu_item_new_with_label (title);
 101         g_object_set_data (G_OBJECT (item), "index",
 102                            GINT_TO_POINTER (index));
 103
 104         label = GTK_LABEL (GTK_BIN (item)->child);
 105         gtk_label_set_ellipsize (label, PANGO_ELLIPSIZE_END);
 106         gtk_label_set_max_width_chars (label, MAX_LABEL_LENGTH);
 107
 108         g_signal_connect (item, "activate",
 109                           G_CALLBACK (activate_menu_item_cb),
 110                           action);
 111
 112         gtk_widget_show (item);
 113
 114         return item;
 115 }
 116
 117 static GtkWidget *
 118 new_empty_history_menu_item (EvNavigationAction *action)
 119 {
 120         GtkWidget *item;
 121
 122         item = gtk_image_menu_item_new_with_label (_("Empty"));
 123         gtk_widget_set_sensitive (item, FALSE);
 124         gtk_widget_show (item);
 125
 126         return item;
 127 }
 128
 129 static GtkWidget *
 130 build_menu (EvNavigationAction *action)
 131 {
 132         GtkMenuShell *menu;
 133         GtkWidget *item;
 134         EvLink *link;
 135         EvHistory *history = action->priv->history;
 136         int start, end, i;
 137
 138         menu = GTK_MENU_SHELL (gtk_menu_new ());
 139
 140         if (history == NULL || ev_history_get_n_links (history) <= 0) {
 141                 item = new_empty_history_menu_item (action);
 142                 gtk_menu_shell_append (menu, item);
 143                 return GTK_WIDGET (menu);
 144         }
 145
 146         start = MAX (ev_history_get_current_index (action->priv->history) - 5, 0);
 147         end = MIN (ev_history_get_n_links (history), start + 7);
 148
 149         for (i = start; i < end; i++) {
 150                 link = ev_history_get_link_nth (history, i);
 151                 item = new_history_menu_item (action, link, i);
 152                 gtk_menu_shell_prepend (menu, item);
 153         }
 154
 155         return GTK_WIDGET (menu);
 156 }
 157
 158 static void
 159 menu_activated_cb (EvNavigationActionWidget *button,
 160                    EvNavigationAction *action)
 161 {
 162         GtkWidget *menu;
 163
 164         menu = build_menu (action);
 165         ev_navigation_action_widget_set_menu (button, menu);
 166 }
 167
 168 static void
 169 connect_proxy (GtkAction *action, GtkWidget *proxy)
 170 {
 171         GtkWidget *menu;
 172
 173         /* set dummy menu so the arrow gets sensitive */
 174         menu = gtk_menu_new ();
 175         ev_navigation_action_widget_set_menu (EV_NAVIGATION_ACTION_WIDGET (proxy), menu);
 176
 177         g_signal_connect (proxy, "show-menu",
 178                           G_CALLBACK (menu_activated_cb), action);
 179
 180         GTK_ACTION_CLASS (ev_navigation_action_parent_class)->connect_proxy (action, proxy);
 181 }
 182
 183 static GtkWidget *
 184 create_tool_item (GtkAction *action)
 185 {
 186         EvNavigationActionWidget *proxy;
 187
 188         proxy = g_object_new (EV_TYPE_NAVIGATION_ACTION_WIDGET, NULL);
 189         gtk_widget_show (GTK_WIDGET (proxy));
 190
 191         return GTK_WIDGET (proxy);
 192 }
 193
 194 static void
 195 ev_navigation_action_init (EvNavigationAction *action)
 196 {
 197         action->priv = EV_NAVIGATION_ACTION_GET_PRIVATE (action);
 198 }
 199
 200 static void
 201 ev_navigation_action_finalize (GObject *object)
 202 {
 203         EvNavigationAction *action = EV_NAVIGATION_ACTION (object);
 204
 205         if (action->priv->history) {
 206                 g_object_add_weak_pointer (G_OBJECT (action->priv->history),
 207                                            (gpointer *) &action->priv->history);
 208         }
 209
 210         G_OBJECT_CLASS (ev_navigation_action_parent_class)->finalize (object);
 211 }
 212
 213 static void
 214 ev_navigation_action_class_init (EvNavigationActionClass *class)
 215 {
 216         GObjectClass *object_class = G_OBJECT_CLASS (class);
 217         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 218
 219         object_class->finalize = ev_navigation_action_finalize;
 220
 221         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
 222         action_class->create_tool_item = create_tool_item;
 223         action_class->connect_proxy = connect_proxy;
 224
 225         widget_signals[WIDGET_ACTIVATE_LINK] = g_signal_new ("activate_link",
 226                                                G_OBJECT_CLASS_TYPE (object_class),
 227                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 228                                                G_STRUCT_OFFSET (EvNavigationActionClass, activate_link),
 229                                                NULL, NULL,
 230                                                g_cclosure_marshal_VOID__OBJECT,
 231                                                G_TYPE_NONE, 1,
 232                                                G_TYPE_OBJECT);
 233
 234         g_type_class_add_private (object_class, sizeof (EvNavigationActionPrivate));
 235 }