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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                 gchar *page_label;
185
186                 gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry), 
187                                            CLAMP (ev_page_cache_get_max_label_chars (page_cache), 
188                                            4, 12));     
189                 
190                 page_label = ev_page_cache_get_page_label (page_cache, page);
191                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), page_label);
192                 gtk_editable_set_position (GTK_EDITABLE (proxy->entry), -1);
193                 g_free (page_label);
194                 
195         } else {
196                 gtk_entry_set_text (GTK_ENTRY (proxy->entry), "");
197         }
198
199         update_pages_label (proxy, page, page_cache);
200 }
201
202 static void
203 activate_cb (GtkWidget *entry, GtkAction *action)
204 {
205         EvPageAction *page = EV_PAGE_ACTION (action);
206         EvPageCache *page_cache;
207         const char *text;
208         gboolean changed;
209
210         text = gtk_entry_get_text (GTK_ENTRY (entry));
211         page_cache = page->priv->page_cache;
212
213         g_signal_emit (action, signals[ACTIVATE_LABEL], 0, text, &changed);
214
215         if (!changed) {
216                 /* rest the entry to the current page if we were unable to
217                  * change it */
218                 gchar *page_label =
219                         ev_page_cache_get_page_label (page_cache,
220                                                       ev_page_cache_get_current_page (page_cache));
221                 gtk_entry_set_text (GTK_ENTRY (entry), page_label);
222                 gtk_editable_set_position (GTK_EDITABLE (entry), -1);
223                 g_free (page_label);
224         }
225 }
226
227 static GtkWidget *
228 create_tool_item (GtkAction *action)
229 {
230         EvPageActionWidget *proxy;
231         GtkWidget *hbox;
232
233         proxy = g_object_new (ev_page_action_widget_get_type (), NULL);
234         gtk_container_set_border_width (GTK_CONTAINER (proxy), 6); 
235         gtk_widget_show (GTK_WIDGET (proxy));
236
237         hbox = gtk_hbox_new (FALSE, 0);
238         gtk_box_set_spacing (GTK_BOX (hbox), 6);
239
240         proxy->entry = gtk_entry_new ();
241         gtk_entry_set_width_chars (GTK_ENTRY (proxy->entry), 5);
242         gtk_box_pack_start (GTK_BOX (hbox), proxy->entry, FALSE, FALSE, 0);
243         gtk_widget_show (proxy->entry);
244         g_signal_connect (proxy->entry, "activate",
245                           G_CALLBACK (activate_cb),
246                           action);
247
248         proxy->label = gtk_label_new (NULL);
249         gtk_box_pack_start (GTK_BOX (hbox), proxy->label, FALSE, FALSE, 0);
250         gtk_widget_show (proxy->label);
251
252         gtk_container_add (GTK_CONTAINER (proxy), hbox);
253         gtk_widget_show (hbox);
254
255         return GTK_WIDGET (proxy);
256 }
257
258 static void
259 update_page_cache (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
260 {
261         EvPageCache *page_cache;
262         guint signal_id;
263
264         page_cache = page->priv->page_cache;
265
266         /* clear the old signal */
267         if (proxy->signal_id > 0 && proxy->page_cache)
268                 g_signal_handler_disconnect (proxy->page_cache, proxy->signal_id);
269         
270         if (page_cache != NULL) {
271                 signal_id = g_signal_connect_object (page_cache,
272                                                      "page-changed",
273                                                      G_CALLBACK (page_changed_cb),
274                                                      proxy, 0);
275                 /* Set the initial value */
276                 page_changed_cb (page_cache,
277                                  ev_page_cache_get_current_page (page_cache),
278                                  proxy);
279         } else {
280                 /* Or clear the entry */
281                 signal_id = 0;
282                 page_changed_cb (NULL, 0, proxy);
283         }
284         ev_page_action_widget_set_page_cache (proxy, page_cache);
285         proxy->signal_id = signal_id;
286 }
287
288 static gboolean
289 build_new_tree_cb (GtkTreeModel *model,
290                    GtkTreePath  *path,
291                    GtkTreeIter  *iter,
292                    gpointer      data)
293 {
294         GtkTreeModel *filter_model = GTK_TREE_MODEL (data);
295         EvLink *link;
296
297         gtk_tree_model_get (model, iter,
298                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
299                             -1);
300
301         if (link && ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
302                 GtkTreeIter filter_iter;
303
304                 gtk_list_store_append (GTK_LIST_STORE (filter_model), &filter_iter);
305                 gtk_list_store_set (GTK_LIST_STORE (filter_model), &filter_iter,
306                                     0, iter,
307                                     -1);
308         }
309         
310         if (link)
311                 g_object_unref (link);
312         
313         return FALSE;
314 }
315
316 static GtkTreeModel *
317 get_filter_model_from_model (GtkTreeModel *model)
318 {
319         GtkTreeModel *filter_model;
320
321         filter_model =
322                 (GtkTreeModel *) g_object_get_data (G_OBJECT (model), EPA_FILTER_MODEL_DATA);
323         if (filter_model == NULL) {
324                 filter_model = (GtkTreeModel *) gtk_list_store_new (1, GTK_TYPE_TREE_ITER);
325
326                 gtk_tree_model_foreach (model,
327                                         build_new_tree_cb,
328                                         filter_model);
329                 g_object_set_data_full (G_OBJECT (model), EPA_FILTER_MODEL_DATA, filter_model, g_object_unref);
330         }
331
332         return filter_model;
333 }
334
335 static gboolean
336 match_selected_cb (GtkEntryCompletion *completion,
337                    GtkTreeModel       *filter_model,
338                    GtkTreeIter        *filter_iter,
339                    EvPageActionWidget *proxy)
340 {
341         EvLink *link;
342         GtkTreeIter *iter;
343
344         gtk_tree_model_get (filter_model, filter_iter,
345                             0, &iter,
346                             -1);
347         gtk_tree_model_get (proxy->model, iter,
348                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
349                             -1);
350
351         g_signal_emit (proxy, widget_signals[WIDGET_ACTIVATE_LINK], 0, link);
352
353         if (link)
354                 g_object_unref (link);
355
356         gtk_tree_iter_free (iter);
357         
358         return TRUE;
359 }
360                    
361
362 static void
363 display_completion_text (GtkCellLayout      *cell_layout,
364                          GtkCellRenderer    *renderer,
365                          GtkTreeModel       *filter_model,
366                          GtkTreeIter        *filter_iter,
367                          EvPageActionWidget *proxy)
368 {
369         EvLink *link;
370         GtkTreeIter *iter;
371
372         gtk_tree_model_get (filter_model, filter_iter,
373                             0, &iter,
374                             -1);
375         gtk_tree_model_get (proxy->model, iter,
376                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
377                             -1);
378
379         g_object_set (renderer, "text", ev_link_get_title (link), NULL);
380
381         if (link)
382                 g_object_unref (link);
383         
384         gtk_tree_iter_free (iter);
385 }
386
387 static gboolean
388 match_completion (GtkEntryCompletion *completion,
389                   const gchar        *key,
390                   GtkTreeIter        *filter_iter,
391                   EvPageActionWidget *proxy)
392 {
393         EvLink *link;
394         GtkTreeIter *iter;
395         const gchar *text = NULL;
396
397         gtk_tree_model_get (gtk_entry_completion_get_model (completion),
398                             filter_iter,
399                             0, &iter,
400                             -1);
401         gtk_tree_model_get (proxy->model, iter,
402                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
403                             -1);
404
405
406         if (link) {
407                 text = ev_link_get_title (link);
408                 g_object_unref (link);
409         }
410
411         gtk_tree_iter_free (iter);
412
413         if (text && key ) {
414                 gchar *normalized_text;
415                 gchar *normalized_key;
416                 gchar *case_normalized_text;
417                 gchar *case_normalized_key;
418                 gboolean retval = FALSE;
419
420                 normalized_text = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
421                 normalized_key = g_utf8_normalize (key, -1, G_NORMALIZE_ALL);
422                 case_normalized_text = g_utf8_casefold (normalized_text, -1);
423                 case_normalized_key = g_utf8_casefold (normalized_key, -1);
424
425                 if (strstr (case_normalized_text, case_normalized_key))
426                         retval = TRUE;
427
428                 g_free (normalized_text);
429                 g_free (normalized_key);
430                 g_free (case_normalized_text);
431                 g_free (case_normalized_key);
432
433                 return retval;
434         }
435
436         return FALSE;
437 }
438
439
440 static void
441 update_model (EvPageAction *page, GParamSpec *pspec, EvPageActionWidget *proxy)
442 {
443         GtkTreeModel *model;
444         GtkTreeModel *filter_model;
445
446         g_object_get (G_OBJECT (page),
447                       "model", &model,
448                       NULL);
449         if (model != NULL) {
450                 /* Magik */
451                 GtkEntryCompletion *completion;
452                 GtkCellRenderer *renderer;
453
454                 proxy->model = model;
455                 filter_model = get_filter_model_from_model (model);
456
457                 completion = gtk_entry_completion_new ();
458
459                 /* popup-set-width is 2.7.0 only */
460                 g_object_set (G_OBJECT (completion),
461                               "popup-set-width", FALSE,
462                               "model", filter_model,
463                               NULL);
464
465                 g_signal_connect (completion, "match-selected", G_CALLBACK (match_selected_cb), proxy);
466                 gtk_entry_completion_set_match_func (completion,
467                                                      (GtkEntryCompletionMatchFunc) match_completion,
468                                                      proxy, NULL);
469
470                 /* Set up the layout */
471                 renderer = (GtkCellRenderer *)
472                         g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
473                                       "ellipsize", PANGO_ELLIPSIZE_END,
474                                       "width_chars", 30,
475                                       NULL);
476                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion), renderer, TRUE);
477                 gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (completion),
478                                                     renderer,
479                                                     (GtkCellLayoutDataFunc) display_completion_text,
480                                                     proxy, NULL);
481                 gtk_entry_set_completion (GTK_ENTRY (proxy->entry), completion);
482                 
483                 g_object_unref (completion);
484                 g_object_unref (model);
485         }
486 }
487
488 static void
489 activate_link_cb (EvPageActionWidget *proxy, EvLink *link, EvPageAction *action)
490 {
491         g_signal_emit (action, signals[ACTIVATE_LINK], 0, link);
492 }
493
494 static void
495 connect_proxy (GtkAction *action, GtkWidget *proxy)
496 {
497         if (GTK_IS_TOOL_ITEM (proxy)) {
498                 g_signal_connect_object (action, "notify::page-cache",
499                                          G_CALLBACK (update_page_cache),
500                                          proxy, 0);
501                 g_signal_connect (proxy, "activate_link",
502                                   G_CALLBACK (activate_link_cb),
503                                   action);
504                 update_page_cache (EV_PAGE_ACTION (action), NULL,
505                                    EV_PAGE_ACTION_WIDGET (proxy));
506                 /* We only go through this whole rigmarole if we can set
507                  * GtkEntryCompletion::popup-set-width, which appeared in
508                  * GTK+-2.7.0 */
509                 if (gtk_check_version (2, 7, 0) == NULL) {
510                         g_signal_connect_object (action, "notify::model",
511                                                  G_CALLBACK (update_model),
512                                                  proxy, 0);
513                 }
514         }
515
516         GTK_ACTION_CLASS (ev_page_action_parent_class)->connect_proxy (action, proxy);
517 }
518
519 static void
520 ev_page_action_dispose (GObject *object)
521 {
522         EvPageAction *page = EV_PAGE_ACTION (object);
523
524         if (page->priv->page_cache) {
525                 g_object_unref (page->priv->page_cache);
526                 page->priv->page_cache = NULL;
527         }
528
529         G_OBJECT_CLASS (ev_page_action_parent_class)->dispose (object);
530 }
531
532 static void
533 ev_page_action_set_property (GObject      *object,
534                              guint         prop_id,
535                              const GValue *value,
536                              GParamSpec   *pspec)
537 {
538         EvPageAction *page;
539         EvPageCache *page_cache;
540         GtkTreeModel *model;
541   
542         page = EV_PAGE_ACTION (object);
543
544         switch (prop_id)
545         {
546         case PROP_PAGE_CACHE:
547                 page_cache = page->priv->page_cache;
548                 page->priv->page_cache = EV_PAGE_CACHE (g_value_dup_object (value));
549                 if (page_cache)
550                         g_object_unref (page_cache);
551                 break;
552         case PROP_MODEL:
553                 model = page->priv->model;
554                 page->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
555                 if (model)
556                         g_object_unref (model);
557                 break;
558         default:
559                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
560                 break;
561         }
562 }
563
564 static void
565 ev_page_action_get_property (GObject    *object,
566                              guint       prop_id,
567                              GValue     *value,
568                              GParamSpec *pspec)
569 {
570         EvPageAction *page;
571   
572         page = EV_PAGE_ACTION (object);
573
574         switch (prop_id)
575         {
576         case PROP_PAGE_CACHE:
577                 g_value_set_object (value, page->priv->page_cache);
578                 break;
579         case PROP_MODEL:
580                 g_value_set_object (value, page->priv->model);
581                 break;
582         default:
583                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
584                 break;
585         }
586 }
587
588 void
589 ev_page_action_set_document (EvPageAction *page, EvDocument *document)
590 {
591         EvPageCache *page_cache = NULL;
592
593         if (document)
594                 page_cache = ev_page_cache_get (document);
595         
596         g_object_set (page,
597                       "page-cache", page_cache,
598                       "model", NULL,
599                       NULL);
600 }
601
602 void
603 ev_page_action_set_model (EvPageAction *page_action,
604                           GtkTreeModel *model)
605 {
606         g_object_set (page_action,
607                       "model", model,
608                       NULL);
609 }
610
611 void
612 ev_page_action_grab_focus (EvPageAction *page_action)
613 {
614         GSList *proxies;
615
616         proxies = gtk_action_get_proxies (GTK_ACTION (page_action));
617         for (; proxies != NULL; proxies = proxies->next) {
618                 EvPageActionWidget *proxy;
619
620                 proxy = EV_PAGE_ACTION_WIDGET (proxies->data);
621                 gtk_widget_grab_focus (proxy->entry);
622         }
623 }
624
625 static void
626 ev_page_action_init (EvPageAction *page)
627 {
628         page->priv = EV_PAGE_ACTION_GET_PRIVATE (page);
629 }
630
631 static void
632 ev_page_action_class_init (EvPageActionClass *class)
633 {
634         GObjectClass *object_class = G_OBJECT_CLASS (class);
635         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
636
637         object_class->dispose = ev_page_action_dispose;
638         object_class->set_property = ev_page_action_set_property;
639         object_class->get_property = ev_page_action_get_property;
640
641         action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
642         action_class->create_tool_item = create_tool_item;
643         action_class->connect_proxy = connect_proxy;
644
645         signals[ACTIVATE_LINK] = g_signal_new ("activate_link",
646                                                G_OBJECT_CLASS_TYPE (object_class),
647                                                G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
648                                                G_STRUCT_OFFSET (EvPageActionClass, activate_link),
649                                                NULL, NULL,
650                                                g_cclosure_marshal_VOID__OBJECT,
651                                                G_TYPE_NONE, 1,
652                                                G_TYPE_OBJECT);
653         signals[ACTIVATE_LABEL] = g_signal_new ("activate_label",
654                                                 G_OBJECT_CLASS_TYPE (object_class),
655                                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
656                                                 G_STRUCT_OFFSET (EvPageActionClass, activate_link),
657                                                 NULL, NULL,
658                                                 ev_marshal_BOOLEAN__STRING,
659                                                 G_TYPE_BOOLEAN, 1,
660                                                 G_TYPE_STRING);
661
662         g_object_class_install_property (object_class,
663                                          PROP_PAGE_CACHE,
664                                          g_param_spec_object ("page-cache",
665                                                               "Page Cache",
666                                                               "Current page cache",
667                                                               EV_TYPE_PAGE_CACHE,
668                                                               G_PARAM_READWRITE));
669
670         g_object_class_install_property (object_class,
671                                          PROP_MODEL,
672                                          g_param_spec_object ("model",
673                                                               "Model",
674                                                               "Current Model",
675                                                               GTK_TYPE_TREE_MODEL,
676                                                               G_PARAM_READWRITE));
677
678         g_type_class_add_private (object_class, sizeof (EvPageActionPrivate));
679 }