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         EvDocument *document;
  46         EvDocumentModel *doc_model;
  47
  48         GtkWidget *entry;
  49         GtkWidget *label;
  50         guint signal_id;
  51         GtkTreeModel *filter_model;
  52         GtkTreeModel *model;
  53 };
  54
  55 static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
  56
  57 G_DEFINE_TYPE (EvPageActionWidget, ev_page_action_widget, GTK_TYPE_TOOL_ITEM)
  58
  59 static void
  60 update_pages_label (EvPageActionWidget *action_widget,
  61                     gint                page)
  62 {
  63         char *label_text;
  64         gint n_pages;
  65
  66         n_pages = ev_document_get_n_pages (action_widget->document);
  67         if (ev_document_has_text_page_labels (action_widget->document)) {
  68                 label_text = g_strdup_printf (_("(%d of %d)"), page + 1, n_pages);
  69         } else {
  70                 label_text = g_strdup_printf (_("of %d"), n_pages);
  71         }
  72         gtk_label_set_text (GTK_LABEL (action_widget->label), label_text);
  73         g_free (label_text);
  74 }
  75
  76 static void
  77 ev_page_action_widget_set_current_page (EvPageActionWidget *action_widget,
  78                                         gint                page)
  79 {
  80         if (page >= 0) {
  81                 gchar *page_label;
  82
  83                 gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry),
  84                                            CLAMP (ev_document_get_max_label_len (action_widget->document),
  85                                                   6, 12));
  86
  87                 page_label = ev_document_get_page_label (action_widget->document, 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);
  97 }
  98
  99 static void
 100 page_changed_cb (EvDocumentModel    *model,
 101                  gint                old_page,
 102                  gint                new_page,
 103                  EvPageActionWidget *action_widget)
 104 {
 105         ev_page_action_widget_set_current_page (action_widget, new_page);
 106 }
 107
 108 static gboolean
 109 page_scroll_cb (EvPageActionWidget *action_widget, GdkEventScroll *event)
 110 {
 111         EvDocumentModel *model = action_widget->doc_model;
 112         gint pageno;
 113
 114         pageno = ev_document_model_get_page (model);
 115         if ((event->direction == GDK_SCROLL_DOWN) &&
 116             (pageno < ev_document_get_n_pages (action_widget->document) - 1))
 117                 pageno++;
 118         if ((event->direction == GDK_SCROLL_UP) && (pageno > 0))
 119                 pageno--;
 120         ev_document_model_set_page (model, pageno);
 121
 122         return TRUE;
 123 }
 124
 125 static void
 126 activate_cb (EvPageActionWidget *action_widget)
 127 {
 128         EvDocumentModel *model;
 129         const char *text;
 130         gchar *page_label;
 131         EvLinkDest *link_dest;
 132         EvLinkAction *link_action;
 133         EvLink *link;
 134         gchar *link_text;
 135
 136         text = gtk_entry_get_text (GTK_ENTRY (action_widget->entry));
 137
 138         link_dest = ev_link_dest_new_page_label (text);
 139         link_action = ev_link_action_new_dest (link_dest);
 140         link_text = g_strdup_printf ("Page: %s", text);
 141         link = ev_link_new (link_text, link_action);
 142
 143         g_signal_emit (action_widget, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
 144
 145         g_object_unref (link);
 146         g_free (link_text);
 147
 148         /* rest the entry to the current page if we were unable to
 149          * change it */
 150         model = action_widget->doc_model;
 151         page_label = ev_document_get_page_label (action_widget->document,
 152                                                  ev_document_model_get_page (model));
 153         gtk_entry_set_text (GTK_ENTRY (action_widget->entry), page_label);
 154         gtk_editable_set_position (GTK_EDITABLE (action_widget->entry), -1);
 155         g_free (page_label);
 156 }
 157
 158 static void
 159 ev_page_action_widget_init (EvPageActionWidget *action_widget)
 160 {
 161         GtkWidget *hbox;
 162         AtkObject *obj;
 163
 164         hbox = gtk_hbox_new (FALSE, 0);
 165         gtk_box_set_spacing (GTK_BOX (hbox), 6);
 166
 167         action_widget->entry = gtk_entry_new ();
 168         gtk_widget_add_events (action_widget->entry,
 169                                GDK_BUTTON_MOTION_MASK);
 170         gtk_entry_set_width_chars (GTK_ENTRY (action_widget->entry), 5);
 171         gtk_entry_set_text (GTK_ENTRY (action_widget->entry), "");
 172         g_signal_connect_swapped (action_widget->entry, "scroll-event",
 173                                   G_CALLBACK (page_scroll_cb),
 174                                   action_widget);
 175         g_signal_connect_swapped (action_widget->entry, "activate",
 176                                   G_CALLBACK (activate_cb),
 177                                   action_widget);
 178
 179         obj = gtk_widget_get_accessible (action_widget->entry);
 180         atk_object_set_name (obj, "page-label-entry");
 181
 182         gtk_box_pack_start (GTK_BOX (hbox), action_widget->entry,
 183                             FALSE, FALSE, 0);
 184         gtk_widget_show (action_widget->entry);
 185
 186         action_widget->label = gtk_label_new (NULL);
 187         gtk_box_pack_start (GTK_BOX (hbox), action_widget->label,
 188                             FALSE, FALSE, 0);
 189         gtk_widget_show (action_widget->label);
 190
 191         gtk_container_set_border_width (GTK_CONTAINER (action_widget), 6);
 192         gtk_container_add (GTK_CONTAINER (action_widget), hbox);
 193         gtk_widget_show (hbox);
 194
 195         gtk_widget_show (GTK_WIDGET (action_widget));
 196 }
 197
 198 static void
 199 ev_page_action_widget_document_changed_cb (EvDocumentModel    *model,
 200                                            GParamSpec         *pspec,
 201                                            EvPageActionWidget *action_widget)
 202 {
 203         EvDocument *document = ev_document_model_get_document (model);
 204
 205         g_object_ref (document);
 206         if (action_widget->document)
 207                 g_object_unref (action_widget->document);
 208         action_widget->document = document;
 209
 210         if (action_widget->signal_id > 0) {
 211                 g_signal_handler_disconnect (action_widget->doc_model,
 212                                              action_widget->signal_id);
 213                 action_widget->signal_id = 0;
 214         }
 215         action_widget->signal_id =
 216                 g_signal_connect_object (action_widget->doc_model,
 217                                          "page-changed",
 218                                          G_CALLBACK (page_changed_cb),
 219                                          action_widget, 0);
 220
 221         ev_page_action_widget_set_current_page (action_widget,
 222                                                 ev_document_model_get_page (model));
 223 }
 224
 225 void
 226 ev_page_action_widget_set_model (EvPageActionWidget *action_widget,
 227                                  EvDocumentModel    *model)
 228 {
 229         if (action_widget->doc_model) {
 230                 g_object_remove_weak_pointer (G_OBJECT (action_widget->doc_model),
 231                                               (gpointer)&action_widget->doc_model);
 232         }
 233         action_widget->doc_model = model;
 234         g_object_add_weak_pointer (G_OBJECT (model),
 235                                    (gpointer)&action_widget->doc_model);
 236
 237         g_signal_connect (model, "notify::document",
 238                           G_CALLBACK (ev_page_action_widget_document_changed_cb),
 239                           action_widget);
 240 }
 241
 242 static void
 243 ev_page_action_widget_finalize (GObject *object)
 244 {
 245         EvPageActionWidget *action_widget = EV_PAGE_ACTION_WIDGET (object);
 246
 247         if (action_widget->doc_model != NULL) {
 248                 if (action_widget->signal_id > 0) {
 249                         g_signal_handler_disconnect (action_widget->doc_model,
 250                                                      action_widget->signal_id);
 251                         action_widget->signal_id = 0;
 252                 }
 253                 g_object_remove_weak_pointer (G_OBJECT (action_widget->doc_model),
 254                                               (gpointer)&action_widget->doc_model);
 255                 action_widget->doc_model = NULL;
 256         }
 257
 258         if (action_widget->document) {
 259                 g_object_unref (action_widget->document);
 260                 action_widget->document = NULL;
 261         }
 262
 263         G_OBJECT_CLASS (ev_page_action_widget_parent_class)->finalize (object);
 264 }
 265
 266 static void
 267 ev_page_action_widget_class_init (EvPageActionWidgetClass *class)
 268 {
 269         GObjectClass *object_class = G_OBJECT_CLASS (class);
 270
 271         object_class->finalize = ev_page_action_widget_finalize;
 272
 273         widget_signals[WIDGET_ACTIVATE_LINK] =
 274                 g_signal_new ("activate_link",
 275                               G_OBJECT_CLASS_TYPE (object_class),
 276                               G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 277                               G_STRUCT_OFFSET (EvPageActionClass, activate_link),
 278                               NULL, NULL,
 279                               g_cclosure_marshal_VOID__OBJECT,
 280                               G_TYPE_NONE, 1,
 281                               G_TYPE_OBJECT);
 282
 283 }
 284
 285 static gboolean
 286 match_selected_cb (GtkEntryCompletion *completion,
 287                    GtkTreeModel       *filter_model,
 288                    GtkTreeIter        *filter_iter,
 289                    EvPageActionWidget *proxy)
 290 {
 291         EvLink *link;
 292         GtkTreeIter *iter;
 293
 294         gtk_tree_model_get (filter_model, filter_iter,
 295                             0, &iter,
 296                             -1);
 297         gtk_tree_model_get (proxy->model, iter,
 298                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 299                             -1);
 300
 301         g_signal_emit (proxy, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
 302
 303         if (link)
 304                 g_object_unref (link);
 305
 306         gtk_tree_iter_free (iter);
 307
 308         return TRUE;
 309 }
 310
 311
 312 static void
 313 display_completion_text (GtkCellLayout      *cell_layout,
 314                          GtkCellRenderer    *renderer,
 315                          GtkTreeModel       *filter_model,
 316                          GtkTreeIter        *filter_iter,
 317                          EvPageActionWidget *proxy)
 318 {
 319         EvLink *link;
 320         GtkTreeIter *iter;
 321
 322         gtk_tree_model_get (filter_model, filter_iter,
 323                             0, &iter,
 324                             -1);
 325         gtk_tree_model_get (proxy->model, iter,
 326                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 327                             -1);
 328
 329         g_object_set (renderer, "text", ev_link_get_title (link), NULL);
 330
 331         if (link)
 332                 g_object_unref (link);
 333
 334         gtk_tree_iter_free (iter);
 335 }
 336
 337 static gboolean
 338 match_completion (GtkEntryCompletion *completion,
 339                   const gchar        *key,
 340                   GtkTreeIter        *filter_iter,
 341                   EvPageActionWidget *proxy)
 342 {
 343         EvLink *link;
 344         GtkTreeIter *iter;
 345         const gchar *text = NULL;
 346
 347         gtk_tree_model_get (gtk_entry_completion_get_model (completion),
 348                             filter_iter,
 349                             0, &iter,
 350                             -1);
 351         gtk_tree_model_get (proxy->model, iter,
 352                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 353                             -1);
 354
 355
 356         if (link) {
 357                 text = ev_link_get_title (link);
 358                 g_object_unref (link);
 359         }
 360
 361         gtk_tree_iter_free (iter);
 362
 363         if (text && key) {
 364                 gchar *normalized_text;
 365                 gchar *normalized_key;
 366                 gchar *case_normalized_text;
 367                 gchar *case_normalized_key;
 368                 gboolean retval = FALSE;
 369
 370                 normalized_text = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
 371                 normalized_key = g_utf8_normalize (key, -1, G_NORMALIZE_ALL);
 372                 case_normalized_text = g_utf8_casefold (normalized_text, -1);
 373                 case_normalized_key = g_utf8_casefold (normalized_key, -1);
 374
 375                 if (strstr (case_normalized_text, case_normalized_key))
 376                         retval = TRUE;
 377
 378                 g_free (normalized_text);
 379                 g_free (normalized_key);
 380                 g_free (case_normalized_text);
 381                 g_free (case_normalized_key);
 382
 383                 return retval;
 384         }
 385
 386         return FALSE;
 387 }
 388
 389 /* user data to set on the widget. */
 390 #define EPA_FILTER_MODEL_DATA "epa-filter-model"
 391
 392 static gboolean
 393 build_new_tree_cb (GtkTreeModel *model,
 394                    GtkTreePath  *path,
 395                    GtkTreeIter  *iter,
 396                    gpointer      data)
 397 {
 398         GtkTreeModel *filter_model = GTK_TREE_MODEL (data);
 399         EvLink *link;
 400         EvLinkAction *action;
 401         EvLinkActionType type;
 402
 403         gtk_tree_model_get (model, iter,
 404                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 405                             -1);
 406
 407         if (!link)
 408                 return FALSE;
 409
 410         action = ev_link_get_action (link);
 411         if (!action) {
 412                 g_object_unref (link);
 413                 return FALSE;
 414         }
 415
 416         type = ev_link_action_get_action_type (action);
 417
 418         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
 419                 GtkTreeIter filter_iter;
 420
 421                 gtk_list_store_append (GTK_LIST_STORE (filter_model), &filter_iter);
 422                 gtk_list_store_set (GTK_LIST_STORE (filter_model), &filter_iter,
 423                                     0, iter,
 424                                     -1);
 425         }
 426
 427         g_object_unref (link);
 428
 429         return FALSE;
 430 }
 431
 432 static GtkTreeModel *
 433 get_filter_model_from_model (GtkTreeModel *model)
 434 {
 435         GtkTreeModel *filter_model;
 436
 437         filter_model =
 438                 (GtkTreeModel *) g_object_get_data (G_OBJECT (model), EPA_FILTER_MODEL_DATA);
 439         if (filter_model == NULL) {
 440                 filter_model = (GtkTreeModel *) gtk_list_store_new (1, GTK_TYPE_TREE_ITER);
 441
 442                 gtk_tree_model_foreach (model,
 443                                         build_new_tree_cb,
 444                                         filter_model);
 445                 g_object_set_data_full (G_OBJECT (model), EPA_FILTER_MODEL_DATA, filter_model, g_object_unref);
 446         }
 447
 448         return filter_model;
 449 }
 450
 451
 452 void
 453 ev_page_action_widget_update_links_model (EvPageActionWidget *proxy, GtkTreeModel *model)
 454 {
 455         GtkTreeModel *filter_model;
 456         GtkEntryCompletion *completion;
 457         GtkCellRenderer *renderer;
 458
 459         if (!model)
 460                 return;
 461
 462         /* Magik */
 463         proxy->model = model;
 464         filter_model = get_filter_model_from_model (model);
 465
 466         completion = gtk_entry_completion_new ();
 467         g_object_set (G_OBJECT (completion),
 468                       "popup-set-width", FALSE,
 469                       "model", filter_model,
 470                       NULL);
 471
 472         g_signal_connect (completion, "match-selected", G_CALLBACK (match_selected_cb), proxy);
 473         gtk_entry_completion_set_match_func (completion,
 474                                              (GtkEntryCompletionMatchFunc) match_completion,
 475                                              proxy, NULL);
 476
 477         /* Set up the layout */
 478         renderer = (GtkCellRenderer *)
 479                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 480                               "ellipsize", PANGO_ELLIPSIZE_END,
 481                               "width_chars", 30,
 482                               NULL);
 483         gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), renderer, TRUE);
 484         gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (completion),
 485                                             renderer,
 486                                             (GtkCellLayoutDataFunc) display_completion_text,
 487                                             proxy, NULL);
 488         gtk_entry_set_completion (GTK_ENTRY (proxy->entry), completion);
 489
 490         g_object_unref (completion);
 491 }
 492
 493 void
 494 ev_page_action_widget_grab_focus (EvPageActionWidget *proxy)
 495 {
 496         gtk_widget_grab_focus (proxy->entry);
 497 }
 498