libmisc/ev-page-action-widget.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 <string.h>
  24 #include <glib/gi18n.h>
  25 #include <gtk/gtk.h>
  26
  27 #include <evince-document.h>
  28 #include "ev-page-action.h"
  29 #include "ev-page-action-widget.h"
  30
  31 /* Widget we pass back */
  32 static void  ev_page_action_widget_init       (EvPageActionWidget      *action_widget);
  33 static void  ev_page_action_widget_class_init (EvPageActionWidgetClass *action_widget);
  34
  35 enum
  36 {
  37         WIDGET_ACTIVATE_LINK,
  38         WIDGET_N_SIGNALS
  39 };
  40
  41 struct _EvPageActionWidget
  42 {
  43         GtkToolItem parent;
  44
  45         GtkWidget *entry;
  46         GtkWidget *label;
  47         EvPageCache *page_cache;
  48         guint signal_id;
  49         GtkTreeModel *filter_model;
  50         GtkTreeModel *model;
  51 };
  52
  53 static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
  54
  55 G_DEFINE_TYPE (EvPageActionWidget, ev_page_action_widget, GTK_TYPE_TOOL_ITEM)
  56
  57 static void
  58 update_pages_label (EvPageActionWidget *action_widget,
  59                     gint                page,
  60                     EvPageCache        *page_cache)
  61 {
  62         char *label_text;
  63         gint n_pages;
  64
  65         n_pages = page_cache ? ev_page_cache_get_n_pages (page_cache) : 0;
  66         if (page_cache && ev_page_cache_has_nonnumeric_page_labels (page_cache)) {
  67                 label_text = g_strdup_printf (_("(%d of %d)"), page + 1, n_pages);
  68         } else {
  69                 label_text = g_strdup_printf (_("of %d"), n_pages);
  70         }
  71         gtk_label_set_text (GTK_LABEL (action_widget->label), label_text);
  72         g_free (label_text);
  73 }
  74
  75 static void
  76 page_changed_cb (EvPageCache        *page_cache,
  77                  gint                page,
  78                  EvPageActionWidget *action_widget)
  79 {
  80         if (page_cache && page >= 0) {
  81                 gchar *page_label;
  82
  83                 gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry),
  84                                            CLAMP (ev_page_cache_get_max_label_chars (page_cache),
  85                                                   6, 12));
  86
  87                 page_label = ev_page_cache_get_page_label (page_cache, page);
  88                 gtk_entry_set_text (GTK_ENTRY (action_widget->entry), page_label);
  89                 gtk_editable_set_position (GTK_EDITABLE (action_widget->entry), -1);
  90                 g_free (page_label);
  91
  92         } else {
  93                 gtk_entry_set_text (GTK_ENTRY (action_widget->entry), "");
  94         }
  95
  96         update_pages_label (action_widget, page, page_cache);
  97 }
  98
  99 static gboolean
 100 page_scroll_cb (EvPageActionWidget *action_widget, GdkEventScroll *event)
 101 {
 102         EvPageCache *page_cache = action_widget->page_cache;
 103         gint pageno;
 104
 105         pageno = ev_page_cache_get_current_page (page_cache);
 106         if ((event->direction == GDK_SCROLL_DOWN) &&
 107             (pageno < ev_page_cache_get_n_pages (page_cache) - 1))
 108                 pageno++;
 109         if ((event->direction == GDK_SCROLL_UP) && (pageno > 0))
 110                 pageno--;
 111         ev_page_cache_set_current_page (page_cache, pageno);
 112
 113         return TRUE;
 114 }
 115
 116 static void
 117 activate_cb (EvPageActionWidget *action_widget)
 118 {
 119         EvPageCache *page_cache;
 120         const char *text;
 121         gchar *page_label;
 122         EvLinkDest *link_dest;
 123         EvLinkAction *link_action;
 124         EvLink *link;
 125         gchar *link_text;
 126
 127         text = gtk_entry_get_text (GTK_ENTRY (action_widget->entry));
 128
 129         link_dest = ev_link_dest_new_page_label (text);
 130         link_action = ev_link_action_new_dest (link_dest);
 131         link_text = g_strdup_printf ("Page: %s", text);
 132         link = ev_link_new (link_text, link_action);
 133
 134         g_signal_emit (action_widget, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
 135
 136         g_object_unref (link);
 137         g_free (link_text);
 138
 139         /* rest the entry to the current page if we were unable to
 140          * change it */
 141         page_cache = action_widget->page_cache;
 142         page_label = ev_page_cache_get_page_label (page_cache,
 143                                                    ev_page_cache_get_current_page (page_cache));
 144         gtk_entry_set_text (GTK_ENTRY (action_widget->entry), page_label);
 145         gtk_editable_set_position (GTK_EDITABLE (action_widget->entry), -1);
 146         g_free (page_label);
 147 }
 148
 149 static void
 150 ev_page_action_widget_init (EvPageActionWidget *action_widget)
 151 {
 152         GtkWidget *hbox;
 153         AtkObject *obj;
 154
 155         hbox = gtk_hbox_new (FALSE, 0);
 156         gtk_box_set_spacing (GTK_BOX (hbox), 6);
 157
 158         action_widget->entry = gtk_entry_new ();
 159         gtk_widget_add_events (action_widget->entry,
 160                                GDK_BUTTON_MOTION_MASK);
 161         gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry), 5);
 162         g_signal_connect_swapped (action_widget->entry, "scroll-event",
 163                                   G_CALLBACK (page_scroll_cb),
 164                                   action_widget);
 165         g_signal_connect_swapped (action_widget->entry, "activate",
 166                                   G_CALLBACK (activate_cb),
 167                                   action_widget);
 168
 169         obj = gtk_widget_get_accessible (action_widget->entry);
 170         atk_object_set_name (obj, "page-label-entry");
 171
 172         gtk_box_pack_start (GTK_BOX (hbox), action_widget->entry,
 173                             FALSE, FALSE, 0);
 174         gtk_widget_show (action_widget->entry);
 175
 176         action_widget->label = gtk_label_new (NULL);
 177         gtk_box_pack_start (GTK_BOX (hbox), action_widget->label,
 178                             FALSE, FALSE, 0);
 179         gtk_widget_show (action_widget->label);
 180
 181         gtk_container_set_border_width (GTK_CONTAINER (action_widget), 6);
 182         gtk_container_add (GTK_CONTAINER (action_widget), hbox);
 183         gtk_widget_show (hbox);
 184
 185         gtk_widget_show (GTK_WIDGET (action_widget));
 186 }
 187
 188 void
 189 ev_page_action_widget_set_page_cache (EvPageActionWidget *action_widget,
 190                                       EvPageCache        *page_cache)
 191 {
 192         if (action_widget->page_cache != NULL) {
 193                 if (action_widget->signal_id > 0) {
 194                         g_signal_handler_disconnect (action_widget->page_cache,
 195                                                      action_widget->signal_id);
 196                         action_widget->signal_id = 0;
 197                 }
 198                 g_object_remove_weak_pointer (G_OBJECT (action_widget->page_cache),
 199                                               (gpointer)&action_widget->page_cache);
 200                 action_widget->page_cache = NULL;
 201         }
 202
 203         if (page_cache != NULL) {
 204                 action_widget->page_cache = page_cache;
 205                 g_object_add_weak_pointer (G_OBJECT (page_cache),
 206                                            (gpointer)&action_widget->page_cache);
 207                 action_widget->signal_id =
 208                         g_signal_connect_object (page_cache, "page-changed",
 209                                                  G_CALLBACK (page_changed_cb),
 210                                                  action_widget, 0);
 211                 page_changed_cb (page_cache,
 212                                  ev_page_cache_get_current_page (page_cache),
 213                                  action_widget);
 214         } else {
 215                 action_widget->signal_id = 0;
 216                 page_changed_cb (NULL, 0, action_widget);
 217         }
 218 }
 219
 220 static void
 221 ev_page_action_widget_finalize (GObject *object)
 222 {
 223         EvPageActionWidget *action_widget = EV_PAGE_ACTION_WIDGET (object);
 224
 225         if (action_widget->page_cache != NULL) {
 226                 if (action_widget->signal_id > 0) {
 227                         g_signal_handler_disconnect (action_widget->page_cache,
 228                                                      action_widget->signal_id);
 229                         action_widget->signal_id = 0;
 230                 }
 231                 g_object_remove_weak_pointer (G_OBJECT (action_widget->page_cache),
 232                                               (gpointer)&action_widget->page_cache);
 233                 action_widget->page_cache = NULL;
 234         }
 235
 236         G_OBJECT_CLASS (ev_page_action_widget_parent_class)->finalize (object);
 237 }
 238
 239 static void
 240 ev_page_action_widget_class_init (EvPageActionWidgetClass *class)
 241 {
 242         GObjectClass *object_class = G_OBJECT_CLASS (class);
 243
 244         object_class->finalize = ev_page_action_widget_finalize;
 245
 246         widget_signals[WIDGET_ACTIVATE_LINK] =
 247                 g_signal_new ("activate_link",
 248                               G_OBJECT_CLASS_TYPE (object_class),
 249                               G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 250                               G_STRUCT_OFFSET (EvPageActionClass, activate_link),
 251                               NULL, NULL,
 252                               g_cclosure_marshal_VOID__OBJECT,
 253                               G_TYPE_NONE, 1,
 254                               G_TYPE_OBJECT);
 255
 256 }
 257
 258 static gboolean
 259 match_selected_cb (GtkEntryCompletion *completion,
 260                    GtkTreeModel       *filter_model,
 261                    GtkTreeIter        *filter_iter,
 262                    EvPageActionWidget *proxy)
 263 {
 264         EvLink *link;
 265         GtkTreeIter *iter;
 266
 267         gtk_tree_model_get (filter_model, filter_iter,
 268                             0, &iter,
 269                             -1);
 270         gtk_tree_model_get (proxy->model, iter,
 271                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 272                             -1);
 273
 274         g_signal_emit (proxy, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
 275
 276         if (link)
 277                 g_object_unref (link);
 278
 279         gtk_tree_iter_free (iter);
 280
 281         return TRUE;
 282 }
 283
 284
 285 static void
 286 display_completion_text (GtkCellLayout      *cell_layout,
 287                          GtkCellRenderer    *renderer,
 288                          GtkTreeModel       *filter_model,
 289                          GtkTreeIter        *filter_iter,
 290                          EvPageActionWidget *proxy)
 291 {
 292         EvLink *link;
 293         GtkTreeIter *iter;
 294
 295         gtk_tree_model_get (filter_model, filter_iter,
 296                             0, &iter,
 297                             -1);
 298         gtk_tree_model_get (proxy->model, iter,
 299                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 300                             -1);
 301
 302         g_object_set (renderer, "text", ev_link_get_title (link), NULL);
 303
 304         if (link)
 305                 g_object_unref (link);
 306
 307         gtk_tree_iter_free (iter);
 308 }
 309
 310 static gboolean
 311 match_completion (GtkEntryCompletion *completion,
 312                   const gchar        *key,
 313                   GtkTreeIter        *filter_iter,
 314                   EvPageActionWidget *proxy)
 315 {
 316         EvLink *link;
 317         GtkTreeIter *iter;
 318         const gchar *text = NULL;
 319
 320         gtk_tree_model_get (gtk_entry_completion_get_model (completion),
 321                             filter_iter,
 322                             0, &iter,
 323                             -1);
 324         gtk_tree_model_get (proxy->model, iter,
 325                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 326                             -1);
 327
 328
 329         if (link) {
 330                 text = ev_link_get_title (link);
 331                 g_object_unref (link);
 332         }
 333
 334         gtk_tree_iter_free (iter);
 335
 336         if (text && key) {
 337                 gchar *normalized_text;
 338                 gchar *normalized_key;
 339                 gchar *case_normalized_text;
 340                 gchar *case_normalized_key;
 341                 gboolean retval = FALSE;
 342
 343                 normalized_text = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
 344                 normalized_key = g_utf8_normalize (key, -1, G_NORMALIZE_ALL);
 345                 case_normalized_text = g_utf8_casefold (normalized_text, -1);
 346                 case_normalized_key = g_utf8_casefold (normalized_key, -1);
 347
 348                 if (strstr (case_normalized_text, case_normalized_key))
 349                         retval = TRUE;
 350
 351                 g_free (normalized_text);
 352                 g_free (normalized_key);
 353                 g_free (case_normalized_text);
 354                 g_free (case_normalized_key);
 355
 356                 return retval;
 357         }
 358
 359         return FALSE;
 360 }
 361
 362 /* user data to set on the widget. */
 363 #define EPA_FILTER_MODEL_DATA "epa-filter-model"
 364
 365 static gboolean
 366 build_new_tree_cb (GtkTreeModel *model,
 367                    GtkTreePath  *path,
 368                    GtkTreeIter  *iter,
 369                    gpointer      data)
 370 {
 371         GtkTreeModel *filter_model = GTK_TREE_MODEL (data);
 372         EvLink *link;
 373         EvLinkAction *action;
 374         EvLinkActionType type;
 375
 376         gtk_tree_model_get (model, iter,
 377                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 378                             -1);
 379
 380         if (!link)
 381                 return FALSE;
 382
 383         action = ev_link_get_action (link);
 384         if (!action) {
 385                 g_object_unref (link);
 386                 return FALSE;
 387         }
 388
 389         type = ev_link_action_get_action_type (action);
 390
 391         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
 392                 GtkTreeIter filter_iter;
 393
 394                 gtk_list_store_append (GTK_LIST_STORE (filter_model), &filter_iter);
 395                 gtk_list_store_set (GTK_LIST_STORE (filter_model), &filter_iter,
 396                                     0, iter,
 397                                     -1);
 398         }
 399
 400         g_object_unref (link);
 401
 402         return FALSE;
 403 }
 404
 405 static GtkTreeModel *
 406 get_filter_model_from_model (GtkTreeModel *model)
 407 {
 408         GtkTreeModel *filter_model;
 409
 410         filter_model =
 411                 (GtkTreeModel *) g_object_get_data (G_OBJECT (model), EPA_FILTER_MODEL_DATA);
 412         if (filter_model == NULL) {
 413                 filter_model = (GtkTreeModel *) gtk_list_store_new (1, GTK_TYPE_TREE_ITER);
 414
 415                 gtk_tree_model_foreach (model,
 416                                         build_new_tree_cb,
 417                                         filter_model);
 418                 g_object_set_data_full (G_OBJECT (model), EPA_FILTER_MODEL_DATA, filter_model, g_object_unref);
 419         }
 420
 421         return filter_model;
 422 }
 423
 424
 425 void
 426 ev_page_action_widget_update_model (EvPageActionWidget *proxy, GtkTreeModel *model)
 427 {
 428         GtkTreeModel *filter_model;
 429         GtkEntryCompletion *completion;
 430         GtkCellRenderer *renderer;
 431
 432         if (!model)
 433                 return;
 434
 435         /* Magik */
 436         proxy->model = model;
 437         filter_model = get_filter_model_from_model (model);
 438
 439         completion = gtk_entry_completion_new ();
 440         g_object_set (G_OBJECT (completion),
 441                       "popup-set-width", FALSE,
 442                       "model", filter_model,
 443                       NULL);
 444
 445         g_signal_connect (completion, "match-selected", G_CALLBACK (match_selected_cb), proxy);
 446         gtk_entry_completion_set_match_func (completion,
 447                                              (GtkEntryCompletionMatchFunc) match_completion,
 448                                              proxy, NULL);
 449
 450         /* Set up the layout */
 451         renderer = (GtkCellRenderer *)
 452                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 453                               "ellipsize", PANGO_ELLIPSIZE_END,
 454                               "width_chars", 30,
 455                               NULL);
 456         gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), renderer, TRUE);
 457         gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (completion),
 458                                             renderer,
 459                                             (GtkCellLayoutDataFunc) display_completion_text,
 460                                             proxy, NULL);
 461         gtk_entry_set_completion (GTK_ENTRY (proxy->entry), completion);
 462
 463         g_object_unref (completion);
 464         g_object_unref (model);
 465 }
 466
 467 void
 468 ev_page_action_widget_grab_focus (EvPageActionWidget *proxy)
 469 {
 470         gtk_widget_grab_focus (proxy->entry);
 471 }
 472