shell/ev-page-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 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include <string.h>
  26 #include <stdlib.h>
  27
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtk.h>
  30
  31 #include "ev-page-action.h"
  32 #include "ev-page-cache.h"
  33 #include "ev-window.h"
  34 #include "ev-document-links.h"
  35 #include "ev-page-action-widget.h"
  36 #include "ev-marshal.h"
  37
  38 struct _EvPageActionPrivate
  39 {
  40         EvPageCache *page_cache;
  41         GtkTreeModel *model;
  42 };
  43
  44
  45 static void ev_page_action_init       (EvPageAction *action);
  46 static void ev_page_action_class_init (EvPageActionClass *class);
  47
  48 enum
  49 {
  50         ACTIVATE_LINK,
  51         N_SIGNALS
  52 };
  53
  54 static guint signals[N_SIGNALS] = {0, };
  55
  56 G_DEFINE_TYPE (EvPageAction, ev_page_action, GTK_TYPE_ACTION)
  57
  58 #define EV_PAGE_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_PAGE_ACTION, EvPageActionPrivate))
  59
  60 enum {
  61         PROP_0,
  62         PROP_PAGE_CACHE,
  63         PROP_MODEL,
  64 };
  65
  66 static void
  67 update_pages_label (EvPageActionWidget *proxy,
  68                     gint                page,
  69                     EvPageCache        *page_cache)
  70 {
  71         char *label_text;
  72         gint n_pages;
  73
  74         n_pages = page_cache ? ev_page_cache_get_n_pages (page_cache) : 0;
  75         if (page_cache && ev_page_cache_has_nonnumeric_page_labels (page_cache)) {
  76                 label_text = g_strdup_printf (_("(%d of %d)"), page + 1, n_pages);
  77         } else {
  78                 label_text = g_strdup_printf (_("of %d"), n_pages);
  79         }
  80         gtk_label_set_text (GTK_LABEL (proxy->label), label_text);
  81         g_free (label_text);
  82 }
  83
  84 static void
  85 page_changed_cb (EvPageCache        *page_cache,
  86                  gint                page,
  87                  EvPageActionWidget *proxy)
  88 {
  89         g_assert (proxy);
  90
  91         if (page_cache != NULL && page >= 0) {
  92                 gchar *page_label;
  93
  94                 gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry),
  95                                            CLAMP (ev_page_cache_get_max_label_chars (page_cache),
  96                                            6, 12));
  97
  98                 page_label = ev_page_cache_get_page_label (page_cache, page);
  99                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), page_label);
 100                 gtk_editable_set_position (GTK_EDITABLE (proxy->entry), -1);
 101                 g_free (page_label);
 102
 103         } else {
 104                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), "");
 105         }
 106
 107         update_pages_label (proxy, page, page_cache);
 108 }
 109
 110 static void
 111 activate_cb (GtkWidget *entry, GtkAction *action)
 112 {
 113         EvPageAction *page = EV_PAGE_ACTION (action);
 114         EvPageCache *page_cache;
 115         const char *text;
 116         gchar *page_label;
 117
 118         EvLinkDest *link_dest;
 119         EvLinkAction *link_action;
 120         EvLink *link;
 121         gchar *link_text;
 122
 123         text = gtk_entry_get_text (GTK_ENTRY (entry));
 124         page_cache = page->priv->page_cache;
 125
 126
 127         link_dest = ev_link_dest_new_page_label (text);
 128         link_action = ev_link_action_new_dest (link_dest);
 129         link_text = g_strdup_printf ("Page: %s", text);
 130         link = ev_link_new (link_text, link_action);
 131
 132         g_signal_emit (action, signals[ACTIVATE_LINK], 0, link);
 133
 134         g_object_unref (link);
 135         g_free (link_text);
 136
 137         /* rest the entry to the current page if we were unable to
 138          * change it */
 139         page_label = ev_page_cache_get_page_label (page_cache,
 140                                                    ev_page_cache_get_current_page (page_cache));
 141         gtk_entry_set_text (GTK_ENTRY (entry), page_label);
 142         gtk_editable_set_position (GTK_EDITABLE (entry), -1);
 143         g_free (page_label);
 144 }
 145
 146 static gboolean page_scroll_cb(GtkWidget *widget, GdkEventScroll *event, EvPageAction* action)
 147 {
 148         gint pageno;
 149
 150         pageno = ev_page_cache_get_current_page (action->priv->page_cache);
 151         if ((event->direction == GDK_SCROLL_DOWN) &&
 152             (pageno < ev_page_cache_get_n_pages(action->priv->page_cache) - 1))
 153                 pageno++;
 154         if ((event->direction == GDK_SCROLL_UP) && (pageno > 0))
 155                 pageno--;
 156         ev_page_cache_set_current_page (action->priv->page_cache, pageno);
 157
 158         return TRUE;
 159 }
 160
 161 static GtkWidget *
 162 create_tool_item (GtkAction *action)
 163 {
 164         EvPageActionWidget *proxy;
 165         GtkWidget *hbox;
 166         AtkObject *obj;
 167
 168         proxy = g_object_new (ev_page_action_widget_get_type (), NULL);
 169         gtk_container_set_border_width (GTK_CONTAINER (proxy), 6);
 170         gtk_widget_show (GTK_WIDGET (proxy));
 171
 172         hbox = gtk_hbox_new (FALSE, 0);
 173         gtk_box_set_spacing (GTK_BOX (hbox), 6);
 174
 175         proxy->entry = gtk_entry_new ();
 176         obj = gtk_widget_get_accessible (proxy->entry);
 177         atk_object_set_name (obj, "page-label-entry");
 178
 179         g_signal_connect(proxy->entry, "scroll-event",G_CALLBACK(page_scroll_cb),action);
 180         gtk_widget_add_events(GTK_WIDGET(proxy->entry),GDK_BUTTON_MOTION_MASK);
 181         gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry), 5);
 182         gtk_box_pack_start (GTK_BOX (hbox), proxy->entry, FALSE, FALSE, 0);
 183         gtk_widget_show (proxy->entry);
 184         g_signal_connect (proxy->entry, "activate",
 185                           G_CALLBACK (activate_cb),
 186                           action);
 187
 188         proxy->label = gtk_label_new (NULL);
 189         gtk_box_pack_start (GTK_BOX (hbox), proxy->label, FALSE, FALSE, 0);
 190         gtk_widget_show (proxy->label);
 191
 192         gtk_container_add (GTK_CONTAINER (proxy), hbox);
 193         gtk_widget_show (hbox);
 194
 195         return GTK_WIDGET (proxy);
 196 }
 197
 198 static void
 199 update_page_cache (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
 200 {
 201         EvPageCache *page_cache;
 202         guint signal_id;
 203
 204         page_cache = page->priv->page_cache;
 205
 206         /* clear the old signal */
 207         if (proxy->signal_id > 0 && proxy->page_cache)
 208                 g_signal_handler_disconnect (proxy->page_cache, proxy->signal_id);
 209
 210         if (page_cache != NULL) {
 211                 signal_id = g_signal_connect_object (page_cache,
 212                                                      "page-changed",
 213                                                      G_CALLBACK (page_changed_cb),
 214                                                      proxy, 0);
 215                 /* Set the initial value */
 216                 page_changed_cb (page_cache,
 217                                  ev_page_cache_get_current_page (page_cache),
 218                                  proxy);
 219         } else {
 220                 /* Or clear the entry */
 221                 signal_id = 0;
 222                 page_changed_cb (NULL, 0, proxy);
 223         }
 224         ev_page_action_widget_set_page_cache (proxy, page_cache);
 225         proxy->signal_id = signal_id;
 226 }
 227
 228 static void
 229 activate_link_cb (EvPageActionWidget *proxy, EvLink *link, EvPageAction *action)
 230 {
 231         g_signal_emit (action, signals[ACTIVATE_LINK], 0, link);
 232 }
 233
 234 static void
 235 update_model (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
 236 {
 237         GtkTreeModel *model;
 238
 239         g_object_get (G_OBJECT (page),
 240                       "model", &model,
 241                       NULL);
 242
 243         ev_page_action_widget_update_model (proxy, model);
 244 }
 245
 246 static void
 247 connect_proxy (GtkAction *action, GtkWidget *proxy)
 248 {
 249         if (GTK_IS_TOOL_ITEM (proxy)) {
 250                 g_signal_connect_object (action, "notify::page-cache",
 251                                          G_CALLBACK (update_page_cache),
 252                                          proxy, 0);
 253                 g_signal_connect (proxy, "activate_link",
 254                                   G_CALLBACK (activate_link_cb),
 255                                   action);
 256                 update_page_cache (EV_PAGE_ACTION (action), NULL,
 257                                    EV_PAGE_ACTION_WIDGET (proxy));
 258                 g_signal_connect_object (action, "notify::model",
 259                                          G_CALLBACK (update_model),
 260                                          proxy, 0);
 261         }
 262
 263         GTK_ACTION_CLASS (ev_page_action_parent_class)->connect_proxy (action, proxy);
 264 }
 265
 266 static void
 267 ev_page_action_dispose (GObject *object)
 268 {
 269         EvPageAction *page = EV_PAGE_ACTION (object);
 270
 271         if (page->priv->page_cache) {
 272                 g_object_unref (page->priv->page_cache);
 273                 page->priv->page_cache = NULL;
 274         }
 275
 276         G_OBJECT_CLASS (ev_page_action_parent_class)->dispose (object);
 277 }
 278
 279 static void
 280 ev_page_action_set_property (GObject      *object,
 281                              guint         prop_id,
 282                              const GValue *value,
 283                              GParamSpec   *pspec)
 284 {
 285         EvPageAction *page;
 286         EvPageCache *page_cache;
 287         GtkTreeModel *model;
 288
 289         page = EV_PAGE_ACTION (object);
 290
 291         switch (prop_id)
 292         {
 293         case PROP_PAGE_CACHE:
 294                 page_cache = page->priv->page_cache;
 295                 page->priv->page_cache = EV_PAGE_CACHE (g_value_dup_object (value));
 296                 if (page_cache)
 297                         g_object_unref (page_cache);
 298                 break;
 299         case PROP_MODEL:
 300                 model = page->priv->model;
 301                 page->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
 302                 if (model)
 303                         g_object_unref (model);
 304                 break;
 305         default:
 306                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 307                 break;
 308         }
 309 }
 310
 311 static void
 312 ev_page_action_get_property (GObject    *object,
 313                              guint       prop_id,
 314                              GValue     *value,
 315                              GParamSpec *pspec)
 316 {
 317         EvPageAction *page;
 318
 319         page = EV_PAGE_ACTION (object);
 320
 321         switch (prop_id)
 322         {
 323         case PROP_PAGE_CACHE:
 324                 g_value_set_object (value, page->priv->page_cache);
 325                 break;
 326         case PROP_MODEL:
 327                 g_value_set_object (value, page->priv->model);
 328                 break;
 329         default:
 330                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 331                 break;
 332         }
 333 }
 334
 335 void
 336 ev_page_action_set_document (EvPageAction *page, EvDocument *document)
 337 {
 338         EvPageCache *page_cache = NULL;
 339
 340         if (document)
 341                 page_cache = ev_page_cache_get (document);
 342
 343         g_object_set (page,
 344                       "page-cache", page_cache,
 345                       "model", NULL,
 346                       NULL);
 347 }
 348
 349 void
 350 ev_page_action_set_model (EvPageAction *page_action,
 351                           GtkTreeModel *model)
 352 {
 353         g_object_set (page_action,
 354                       "model", model,
 355                       NULL);
 356 }
 357
 358 void
 359 ev_page_action_grab_focus (EvPageAction *page_action)
 360 {
 361         GSList *proxies;
 362
 363         proxies = gtk_action_get_proxies (GTK_ACTION (page_action));
 364         for (; proxies != NULL; proxies = proxies->next) {
 365                 EvPageActionWidget *proxy;
 366
 367                 proxy = EV_PAGE_ACTION_WIDGET (proxies->data);
 368
 369                 if (GTK_WIDGET_MAPPED (GTK_WIDGET (proxy)))
 370                         gtk_widget_grab_focus (proxy->entry);
 371         }
 372 }
 373
 374 static void
 375 ev_page_action_init (EvPageAction *page)
 376 {
 377         page->priv = EV_PAGE_ACTION_GET_PRIVATE (page);
 378 }
 379
 380 static void
 381 ev_page_action_class_init (EvPageActionClass *class)
 382 {
 383         GObjectClass *object_class = G_OBJECT_CLASS (class);
 384         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 385
 386         object_class->dispose = ev_page_action_dispose;
 387         object_class->set_property = ev_page_action_set_property;
 388         object_class->get_property = ev_page_action_get_property;
 389
 390         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
 391         action_class->create_tool_item = create_tool_item;
 392         action_class->connect_proxy = connect_proxy;
 393
 394         signals[ACTIVATE_LINK] = g_signal_new ("activate_link",
 395                                                G_OBJECT_CLASS_TYPE (object_class),
 396                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 397                                                G_STRUCT_OFFSET (EvPageActionClass, activate_link),
 398                                                NULL, NULL,
 399                                                g_cclosure_marshal_VOID__OBJECT,
 400                                                G_TYPE_NONE, 1,
 401                                                G_TYPE_OBJECT);
 402
 403         g_object_class_install_property (object_class,
 404                                          PROP_PAGE_CACHE,
 405                                          g_param_spec_object ("page-cache",
 406                                                               "Page Cache",
 407                                                               "Current page cache",
 408                                                               EV_TYPE_PAGE_CACHE,
 409                                                               G_PARAM_READWRITE));
 410
 411         g_object_class_install_property (object_class,
 412                                          PROP_MODEL,
 413                                          g_param_spec_object ("model",
 414                                                               "Model",
 415                                                               "Current Model",
 416                                                               GTK_TYPE_TREE_MODEL,
 417                                                               G_PARAM_READWRITE));
 418
 419         g_type_class_add_private (object_class, sizeof (EvPageActionPrivate));
 420 }