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