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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  *  $Id$
20  */
21
22 #include "config.h"
23
24 #include "ev-page-action.h"
25 #include "ev-page-cache.h"
26 #include "ev-window.h"
27 #include "ev-document-links.h"
28 #include "ev-marshal.h"
29
30 #include <glib/gi18n.h>
31 #include <gtk/gtkentry.h>
32 #include <gtk/gtktoolitem.h>
33 #include <gtk/gtklabel.h>
34 #include <gtk/gtkhbox.h>
35 #include <string.h>
36
37 typedef struct _EvPageActionWidget EvPageActionWidget;
38 typedef struct _EvPageActionWidgetClass EvPageActionWidgetClass;
39 struct _EvPageActionWidget
40 {
41         GtkToolItem parent;
42
43         GtkWidget *entry;
44         GtkWidget *label;
45         EvPageCache *page_cache;
46         guint signal_id;
47         GtkTreeModel *filter_model;
48         GtkTreeModel *model;
49 };
50
51 struct _EvPageActionWidgetClass
52 {
53         GtkToolItemClass parent_class;
54
55         void (* activate_link) (EvPageActionWidget *page_action,
56                                 EvLink             *link);
57 };
58
59 struct _EvPageActionPrivate
60 {
61         EvPageCache *page_cache;
62         GtkTreeModel *model;
63 };
64
65
66 /* Widget we pass back */
67 static GType ev_page_action_widget_get_type   (void);
68 static void  ev_page_action_widget_init       (EvPageActionWidget      *action_widget);
69 static void  ev_page_action_widget_class_init (EvPageActionWidgetClass *action_widget);
70
71 #define EV_TYPE_PAGE_ACTION_WIDGET (ev_page_action_widget_get_type ())
72 #define EV_PAGE_ACTION_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_PAGE_ACTION_WIDGET, EvPageActionWidget))
73
74 enum
75 {
76         WIDGET_ACTIVATE_LINK,
77         WIDGET_N_SIGNALS
78 };
79
80 static guint widget_signals[WIDGET_N_SIGNALS] = {0, };
81
82 G_DEFINE_TYPE (EvPageActionWidget, ev_page_action_widget, GTK_TYPE_TOOL_ITEM)
83
84 static void
85 ev_page_action_widget_init (EvPageActionWidget *action_widget)
86 {
87
88 }
89
90 static void
91 ev_page_action_widget_set_page_cache (EvPageActionWidget *action_widget,
92                                       EvPageCache        *page_cache)
93 {
94         if (action_widget->page_cache != NULL) {
95                 g_object_remove_weak_pointer (G_OBJECT (action_widget->page_cache),
96                                               (gpointer *)&action_widget->page_cache);
97                 action_widget->page_cache = NULL;
98         }
99
100         if (page_cache != NULL) {
101                 action_widget->page_cache = page_cache;
102                 g_object_add_weak_pointer (G_OBJECT (page_cache),
103                                            (gpointer *)&action_widget->page_cache);
104         }
105 }
106
107 static void
108 ev_page_action_widget_finalize (GObject *object)
109 {
110         EvPageActionWidget *action_widget = EV_PAGE_ACTION_WIDGET (object);
111
112         ev_page_action_widget_set_page_cache (action_widget, NULL);
113 }
114
115 static void
116 ev_page_action_widget_class_init (EvPageActionWidgetClass *class)
117 {
118         GObjectClass *object_class = G_OBJECT_CLASS (class);
119
120         object_class->finalize = ev_page_action_widget_finalize;
121
122         widget_signals[WIDGET_ACTIVATE_LINK] = g_signal_new ("activate_link",
123                                                G_OBJECT_CLASS_TYPE (object_class),
124                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
125                                                G_STRUCT_OFFSET (EvPageActionClass, activate_link),
126                                                NULL, NULL,
127                                                g_cclosure_marshal_VOID__OBJECT,
128                                                G_TYPE_NONE, 1,
129                                                G_TYPE_OBJECT);
130
131 }
132
133 static void ev_page_action_init       (EvPageAction *action);
134 static void ev_page_action_class_init (EvPageActionClass *class);
135
136 enum
137 {
138         ACTIVATE_LINK,
139         ACTIVATE_LABEL,
140         N_SIGNALS
141 };
142
143 static guint signals[N_SIGNALS] = {0, };
144
145 G_DEFINE_TYPE (EvPageAction, ev_page_action, GTK_TYPE_ACTION)
146
147 #define EV_PAGE_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_PAGE_ACTION, EvPageActionPrivate))
148
149 enum {
150         PROP_0,
151         PROP_PAGE_CACHE,
152         PROP_MODEL,
153 };
154
155 /* user data to set on the widget. */
156 #define EPA_FILTER_MODEL_DATA "epa-filter-model"
157
158 static void
159 update_pages_label (EvPageActionWidget *proxy,
160                     gint                page,
161                     EvPageCache        *page_cache)
162 {
163         char *label_text;
164         gint n_pages;
165
166         n_pages = page_cache ? ev_page_cache_get_n_pages (page_cache) : 0;
167         if (page_cache && ev_page_cache_has_nonnumeric_page_labels (page_cache)) {
168                 label_text = g_strdup_printf (_("(%d of %d)"), page + 1, n_pages);
169         } else {
170                 label_text = g_strdup_printf (_("of %d"), n_pages);
171         }
172         gtk_label_set_text (GTK_LABEL (proxy->label), label_text);
173         g_free (label_text);
174 }
175
176 static void
177 page_changed_cb (EvPageCache        *page_cache,
178                  gint                page,
179                  EvPageActionWidget *proxy)
180 {
181         g_assert (proxy);
182         
183         if (page_cache != NULL && page >= 0) {
184         
185                 gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry), 
186                                            CLAMP (ev_page_cache_get_max_label_chars (page_cache), 
187                                            4, 12));     
188                 
189                 gchar *page_label = ev_page_cache_get_page_label (page_cache, page);
190                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), page_label);
191                 gtk_editable_set_position (GTK_EDITABLE (proxy->entry), -1);
192                 g_free (page_label);
193                 
194         } else {
195                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), "");
196         }
197
198         update_pages_label (proxy, page, page_cache);
199 }
200
201 static void
202 activate_cb (GtkWidget *entry, GtkAction *action)
203 {
204         EvPageAction *page = EV_PAGE_ACTION (action);
205         EvPageCache *page_cache;
206         const char *text;
207         gboolean changed;
208
209         text = gtk_entry_get_text (GTK_ENTRY (entry));
210         page_cache = page->priv->page_cache;
211
212         g_signal_emit (action, signals[ACTIVATE_LABEL], 0, text, &changed);
213
214         if (!changed) {
215                 /* rest the entry to the current page if we were unable to
216                  * change it */
217                 gchar *page_label =
218                         ev_page_cache_get_page_label (page_cache,
219                                                       ev_page_cache_get_current_page (page_cache));
220                 gtk_entry_set_text (GTK_ENTRY (entry), page_label);
221                 gtk_editable_set_position (GTK_EDITABLE (entry), -1);
222                 g_free (page_label);
223         }
224 }
225
226 static GtkWidget *
227 create_tool_item (GtkAction *action)
228 {
229         EvPageActionWidget *proxy;
230         GtkWidget *hbox;
231
232         proxy = g_object_new (ev_page_action_widget_get_type (), NULL);
233         gtk_container_set_border_width (GTK_CONTAINER (proxy), 6); 
234         gtk_widget_show (GTK_WIDGET (proxy));
235
236         hbox = gtk_hbox_new (FALSE, 0);
237         gtk_box_set_spacing (GTK_BOX (hbox), 6);
238
239         proxy->entry = gtk_entry_new ();
240         gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry), 5);
241         gtk_box_pack_start (GTK_BOX (hbox), proxy->entry, FALSE, FALSE, 0);
242         gtk_widget_show (proxy->entry);
243         g_signal_connect (proxy->entry, "activate",
244                           G_CALLBACK (activate_cb),
245                           action);
246
247         proxy->label = gtk_label_new (NULL);
248         gtk_box_pack_start (GTK_BOX (hbox), proxy->label, FALSE, FALSE, 0);
249         gtk_widget_show (proxy->label);
250
251         gtk_container_add (GTK_CONTAINER (proxy), hbox);
252         gtk_widget_show (hbox);
253
254         return GTK_WIDGET (proxy);
255 }
256
257 static void
258 update_page_cache (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
259 {
260         EvPageCache *page_cache;
261         guint signal_id;
262
263         page_cache = page->priv->page_cache;
264
265         /* clear the old signal */
266         if (proxy->signal_id > 0 && proxy->page_cache)
267                 g_signal_handler_disconnect (proxy->page_cache, proxy->signal_id);
268         
269         if (page_cache != NULL) {
270                 signal_id = g_signal_connect_object (page_cache,
271                                                      "page-changed",
272                                                      G_CALLBACK (page_changed_cb),
273                                                      proxy, 0);
274                 /* Set the initial value */
275                 page_changed_cb (page_cache,
276                                  ev_page_cache_get_current_page (page_cache),
277                                  proxy);
278         } else {
279                 /* Or clear the entry */
280                 signal_id = 0;
281                 page_changed_cb (NULL, 0, proxy);
282         }
283         ev_page_action_widget_set_page_cache (proxy, page_cache);
284         proxy->signal_id = signal_id;
285 }
286
287 static gboolean
288 build_new_tree_cb (GtkTreeModel *model,
289                    GtkTreePath  *path,
290                    GtkTreeIter  *iter,
291                    gpointer      data)
292 {
293         GtkTreeModel *filter_model = GTK_TREE_MODEL (data);
294         EvLink *link;
295
296         gtk_tree_model_get (model, iter,
297                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
298                             -1);
299
300         if (link && ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
301                 GtkTreeIter filter_iter;
302
303                 gtk_list_store_append (GTK_LIST_STORE (filter_model), &filter_iter);
304                 gtk_list_store_set (GTK_LIST_STORE (filter_model), &filter_iter,
305                                     0, iter,
306                                     -1);
307         }
308         
309         return FALSE;
310 }
311
312 static GtkTreeModel *
313 get_filter_model_from_model (GtkTreeModel *model)
314 {
315         GtkTreeModel *filter_model;
316
317         filter_model =
318                 (GtkTreeModel *) g_object_get_data (G_OBJECT (model), EPA_FILTER_MODEL_DATA);
319         if (filter_model == NULL) {
320                 filter_model = (GtkTreeModel *) gtk_list_store_new (1, GTK_TYPE_TREE_ITER);
321
322                 gtk_tree_model_foreach (model,
323                                         build_new_tree_cb,
324                                         filter_model);
325                 g_object_set_data_full (G_OBJECT (model), EPA_FILTER_MODEL_DATA, filter_model, g_object_unref);
326         }
327
328         return filter_model;
329 }
330
331 static gboolean
332 match_selected_cb (GtkEntryCompletion *completion,
333                    GtkTreeModel       *filter_model,
334                    GtkTreeIter        *filter_iter,
335                    EvPageActionWidget *proxy)
336 {
337         EvLink *link;
338         GtkTreeIter *iter;
339
340         gtk_tree_model_get (filter_model, filter_iter,
341                             0, &iter,
342                             -1);
343         gtk_tree_model_get (proxy->model, iter,
344                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
345                             -1);
346
347         g_signal_emit (proxy, signals[ACTIVATE_LINK], 0, link);
348         
349         return TRUE;
350 }
351                    
352
353 static void
354 display_completion_text (GtkCellLayout      *cell_layout,
355                          GtkCellRenderer    *renderer,
356                          GtkTreeModel       *filter_model,
357                          GtkTreeIter        *filter_iter,
358                          EvPageActionWidget *proxy)
359 {
360         EvLink *link;
361         GtkTreeIter *iter;
362
363         gtk_tree_model_get (filter_model, filter_iter,
364                             0, &iter,
365                             -1);
366         gtk_tree_model_get (proxy->model, iter,
367                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
368                             -1);
369
370         g_object_set (renderer, "text", ev_link_get_title (link), NULL);
371 }
372
373 static gboolean
374 match_completion (GtkEntryCompletion *completion,
375                   const gchar        *key,
376                   GtkTreeIter        *filter_iter,
377                   EvPageActionWidget *proxy)
378 {
379         EvLink *link;
380         GtkTreeIter *iter;
381         const gchar *text = NULL;
382
383         gtk_tree_model_get (gtk_entry_completion_get_model (completion),
384                             filter_iter,
385                             0, &iter,
386                             -1);
387         gtk_tree_model_get (proxy->model, iter,
388                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
389                             -1);
390
391
392         if (link)
393                 text = ev_link_get_title (link);
394
395         if (text && key ) {
396                 gchar *normalized_text;
397                 gchar *normalized_key;
398                 gchar *case_normalized_text;
399                 gchar *case_normalized_key;
400                 gboolean retval = FALSE;
401
402                 normalized_text = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
403                 normalized_key = g_utf8_normalize (key, -1, G_NORMALIZE_ALL);
404                 case_normalized_text = g_utf8_casefold (normalized_text, -1);
405                 case_normalized_key = g_utf8_casefold (normalized_key, -1);
406
407                 if (strstr (case_normalized_text, case_normalized_key))
408                         retval = TRUE;
409
410                 g_free (normalized_text);
411                 g_free (normalized_key);
412                 g_free (case_normalized_text);
413                 g_free (case_normalized_key);
414
415                 return retval;
416         }
417
418         return FALSE;
419 }
420
421
422 static void
423 update_model (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
424 {
425         GtkTreeModel *model;
426         GtkTreeModel *filter_model;
427
428         g_object_get (G_OBJECT (page),
429                       "model", &model,
430                       NULL);
431         if (model != NULL) {
432                 /* Magik */
433                 GtkEntryCompletion *completion;
434                 GtkCellRenderer *renderer;
435
436                 proxy->model = model;
437                 filter_model = get_filter_model_from_model (model);
438
439                 completion = gtk_entry_completion_new ();
440
441                 /* popup-set-width is 2.7.0 only */
442                 g_object_set (G_OBJECT (completion),
443                               "popup-set-width", FALSE,
444                               "model", filter_model,
445                               NULL);
446
447                 g_signal_connect (completion, "match-selected", G_CALLBACK (match_selected_cb), proxy);
448                 gtk_entry_completion_set_match_func (completion,
449                                                      (GtkEntryCompletionMatchFunc) match_completion,
450                                                      proxy, NULL);
451
452                 /* Set up the layout */
453                 renderer = (GtkCellRenderer *)
454                         g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
455                                       "ellipsize", PANGO_ELLIPSIZE_END,
456                                       "width_chars", 30,
457                                       NULL);
458                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), renderer, TRUE);
459                 gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (completion),
460                                                     renderer,
461                                                     (GtkCellLayoutDataFunc) display_completion_text,
462                                                     proxy, NULL);
463                 gtk_entry_set_completion (GTK_ENTRY (proxy->entry), completion);
464         }
465 }
466
467 static void
468 activate_link_cb (EvPageActionWidget *proxy, EvLink *link, EvPageAction *action)
469 {
470         g_signal_emit (action, signals[ACTIVATE_LINK], 0, link);
471 }
472
473 static void
474 connect_proxy (GtkAction *action, GtkWidget *proxy)
475 {
476         if (GTK_IS_TOOL_ITEM (proxy)) {
477                 g_signal_connect_object (action, "notify::page-cache",
478                                          G_CALLBACK (update_page_cache),
479                                          proxy, 0);
480                 g_signal_connect (proxy, "activate_link",
481                                   G_CALLBACK (activate_link_cb),
482                                   action);
483                 update_page_cache (EV_PAGE_ACTION (action), NULL,
484                                    EV_PAGE_ACTION_WIDGET (proxy));
485                 /* We only go through this whole rigmarole if we can set
486                  * GtkEntryCompletion::popup-set-width, which appeared in
487                  * GTK+-2.7.0 */
488                 if (gtk_check_version (2, 7, 0) == NULL) {
489                         g_signal_connect_object (action, "notify::model",
490                                                  G_CALLBACK (update_model),
491                                                  proxy, 0);
492                 }
493         }
494
495         GTK_ACTION_CLASS (ev_page_action_parent_class)->connect_proxy (action, proxy);
496 }
497
498 static void
499 ev_page_action_dispose (GObject *object)
500 {
501         EvPageAction *page = EV_PAGE_ACTION (object);
502
503         if (page->priv->page_cache) {
504                 g_object_unref (page->priv->page_cache);
505                 page->priv->page_cache = NULL;
506         }
507
508         G_OBJECT_CLASS (ev_page_action_parent_class)->dispose (object);
509 }
510
511 static void
512 ev_page_action_set_property (GObject      *object,
513                              guint         prop_id,
514                              const GValue *value,
515                              GParamSpec   *pspec)
516 {
517         EvPageAction *page;
518         EvPageCache *page_cache;
519         GtkTreeModel *model;
520   
521         page = EV_PAGE_ACTION (object);
522
523         switch (prop_id)
524         {
525         case PROP_PAGE_CACHE:
526                 page_cache = page->priv->page_cache;
527                 page->priv->page_cache = EV_PAGE_CACHE (g_value_dup_object (value));
528                 if (page_cache)
529                         g_object_unref (page_cache);
530                 break;
531         case PROP_MODEL:
532                 model = page->priv->model;
533                 page->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
534                 if (model)
535                         g_object_unref (model);
536                 break;
537         default:
538                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
539                 break;
540         }
541 }
542
543 static void
544 ev_page_action_get_property (GObject    *object,
545                              guint       prop_id,
546                              GValue     *value,
547                              GParamSpec *pspec)
548 {
549         EvPageAction *page;
550   
551         page = EV_PAGE_ACTION (object);
552
553         switch (prop_id)
554         {
555         case PROP_PAGE_CACHE:
556                 g_value_set_object (value, page->priv->page_cache);
557                 break;
558         case PROP_MODEL:
559                 g_value_set_object (value, page->priv->model);
560                 break;
561         default:
562                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
563                 break;
564         }
565 }
566
567 void
568 ev_page_action_set_document (EvPageAction *page, EvDocument *document)
569 {
570         EvPageCache *page_cache = NULL;
571
572         if (document)
573                 page_cache = ev_page_cache_get (document);
574         
575         g_object_set (page,
576                       "page-cache", page_cache,
577                       "model", NULL,
578                       NULL);
579 }
580
581 void
582 ev_page_action_set_model (EvPageAction *page_action,
583                           GtkTreeModel *model)
584 {
585         g_object_set (page_action,
586                       "model", model,
587                       NULL);
588 }
589
590 void
591 ev_page_action_grab_focus (EvPageAction *page_action)
592 {
593         GSList *proxies;
594
595         proxies = gtk_action_get_proxies (GTK_ACTION (page_action));
596         for (; proxies != NULL; proxies = proxies->next) {
597                 EvPageActionWidget *proxy;
598
599                 proxy = EV_PAGE_ACTION_WIDGET (proxies->data);
600                 gtk_widget_grab_focus (proxy->entry);
601         }
602 }
603
604 static void
605 ev_page_action_init (EvPageAction *page)
606 {
607         page->priv = EV_PAGE_ACTION_GET_PRIVATE (page);
608 }
609
610 static void
611 ev_page_action_class_init (EvPageActionClass *class)
612 {
613         GObjectClass *object_class = G_OBJECT_CLASS (class);
614         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
615
616         object_class->dispose = ev_page_action_dispose;
617         object_class->set_property = ev_page_action_set_property;
618         object_class->get_property = ev_page_action_get_property;
619
620         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
621         action_class->create_tool_item = create_tool_item;
622         action_class->connect_proxy = connect_proxy;
623
624         signals[ACTIVATE_LINK] = g_signal_new ("activate_link",
625                                                G_OBJECT_CLASS_TYPE (object_class),
626                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
627                                                G_STRUCT_OFFSET (EvPageActionClass, activate_link),
628                                                NULL, NULL,
629                                                g_cclosure_marshal_VOID__OBJECT,
630                                                G_TYPE_NONE, 1,
631                                                G_TYPE_OBJECT);
632         signals[ACTIVATE_LABEL] = g_signal_new ("activate_label",
633                                                 G_OBJECT_CLASS_TYPE (object_class),
634                                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
635                                                 G_STRUCT_OFFSET (EvPageActionClass, activate_link),
636                                                 NULL, NULL,
637                                                 ev_marshal_BOOLEAN__STRING,
638                                                 G_TYPE_BOOLEAN, 1,
639                                                 G_TYPE_STRING);
640
641         g_object_class_install_property (object_class,
642                                          PROP_PAGE_CACHE,
643                                          g_param_spec_object ("page-cache",
644                                                               "Page Cache",
645                                                               "Current page cache",
646                                                               EV_TYPE_PAGE_CACHE,
647                                                               G_PARAM_READWRITE));
648
649         g_object_class_install_property (object_class,
650                                          PROP_MODEL,
651                                          g_param_spec_object ("model",
652                                                               "Model",
653                                                               "Current Model",
654                                                               GTK_TYPE_TREE_MODEL,
655                                                               G_PARAM_READWRITE));
656
657         g_type_class_add_private (object_class, sizeof (EvPageActionPrivate));
658 }