1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
2 /* this file is part of evince, a gnome document viewer
4 * Copyright (C) 2004 Red Hat, Inc
6 * Evince is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Evince is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
21 #include <gtk/gtkalignment.h>
22 #include <glib/gi18n.h>
24 #include "ev-marshal.h"
26 #include "ev-document-find.h"
28 #define EV_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
29 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
30 #define EV_VIEW_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
33 GtkWidget parent_instance;
37 GdkWindow *bin_window;
42 GtkAdjustment *hadjustment;
43 GtkAdjustment *vadjustment;
46 int results_on_this_page;
47 int next_page_with_result;
48 double find_percent_complete;
54 GtkWidgetClass parent_class;
56 void (*set_scroll_adjustments) (EvView *view,
57 GtkAdjustment *hadjustment,
58 GtkAdjustment *vadjustment);
60 /* Should this be notify::page? */
61 void (*page_changed) (EvView *view);
64 static guint page_changed_signal = 0;
66 static void ev_view_set_scroll_adjustments (EvView *view,
67 GtkAdjustment *hadjustment,
68 GtkAdjustment *vadjustment);
70 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
72 /*** Helper functions ***/
75 view_update_adjustments (EvView *view)
77 int old_x = view->scroll_x;
78 int old_y = view->scroll_y;
80 if (view->hadjustment)
81 view->scroll_x = view->hadjustment->value;
85 if (view->vadjustment)
86 view->scroll_y = view->vadjustment->value;
90 if (GTK_WIDGET_REALIZED (view) &&
91 (view->scroll_x != old_x || view->scroll_y != old_y)) {
92 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
93 gdk_window_process_updates (view->bin_window, TRUE);
98 view_set_adjustment_values (EvView *view,
99 GtkOrientation orientation)
101 GtkWidget *widget = GTK_WIDGET (view);
102 GtkAdjustment *adjustment;
103 gboolean value_changed = FALSE;
107 if (orientation == GTK_ORIENTATION_HORIZONTAL) {
108 requisition = widget->requisition.width;
109 allocation = widget->allocation.width;
110 adjustment = view->hadjustment;
112 requisition = widget->requisition.height;
113 allocation = widget->allocation.height;
114 adjustment = view->vadjustment;
120 adjustment->page_size = allocation;
121 adjustment->step_increment = allocation * 0.1;
122 adjustment->page_increment = allocation * 0.9;
123 adjustment->lower = 0;
124 adjustment->upper = MAX (allocation, requisition);
126 if (adjustment->value > adjustment->upper - adjustment->page_size) {
127 adjustment->value = adjustment->upper - adjustment->page_size;
128 value_changed = TRUE;
131 gtk_adjustment_changed (adjustment);
133 gtk_adjustment_value_changed (adjustment);
136 /*** Virtual function implementations ***/
139 ev_view_finalize (GObject *object)
141 EvView *view = EV_VIEW (object);
144 g_object_unref (view->document);
146 ev_view_set_scroll_adjustments (view, NULL, NULL);
148 g_array_free (view->find_results, TRUE);
149 view->find_results = NULL;
151 G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
155 ev_view_destroy (GtkObject *object)
157 EvView *view = EV_VIEW (object);
159 ev_view_set_scroll_adjustments (view, NULL, NULL);
161 GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
165 ev_view_size_request (GtkWidget *widget,
166 GtkRequisition *requisition)
168 EvView *view = EV_VIEW (widget);
170 if (GTK_WIDGET_REALIZED (widget)) {
171 if (view->document) {
172 ev_document_get_page_size (view->document,
174 &requisition->height);
176 requisition->width = 10;
177 requisition->height = 10;
184 ev_view_size_allocate (GtkWidget *widget,
185 GtkAllocation *allocation)
187 EvView *view = EV_VIEW (widget);
189 GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
191 view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
192 view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
194 if (GTK_WIDGET_REALIZED (widget)) {
195 gdk_window_resize (view->bin_window,
196 MAX (widget->allocation.width, widget->requisition.width),
197 MAX (widget->allocation.height, widget->requisition.height));
202 update_window_backgrounds (EvView *view)
204 GtkWidget *widget = GTK_WIDGET (view);
206 if (GTK_WIDGET_REALIZED (view)) {
207 gdk_window_set_background (view->bin_window,
208 &widget->style->base[GTK_WIDGET_STATE (widget)]);
213 ev_view_realize (GtkWidget *widget)
215 EvView *view = EV_VIEW (widget);
216 GdkWindowAttr attributes;
218 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
220 attributes.window_type = GDK_WINDOW_CHILD;
221 attributes.wclass = GDK_INPUT_OUTPUT;
222 attributes.visual = gtk_widget_get_visual (widget);
223 attributes.colormap = gtk_widget_get_colormap (widget);
225 attributes.x = widget->allocation.x;
226 attributes.y = widget->allocation.y;
227 attributes.width = widget->allocation.width;
228 attributes.height = widget->allocation.height;
229 attributes.event_mask = 0;
231 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
233 GDK_WA_X | GDK_WA_Y |
236 gdk_window_set_user_data (widget->window, widget);
237 widget->style = gtk_style_attach (widget->style, widget->window);
241 attributes.width = MAX (widget->allocation.width, widget->requisition.width);
242 attributes.height = MAX (widget->allocation.height, widget->requisition.height);
243 attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK;
245 view->bin_window = gdk_window_new (widget->window,
247 GDK_WA_X | GDK_WA_Y |
250 gdk_window_set_user_data (view->bin_window, widget);
251 gdk_window_show (view->bin_window);
253 if (view->document) {
254 ev_document_set_target (view->document, view->bin_window);
256 /* We can't get page size without a target, so we have to
257 * queue a size request at realization. Could be fixed
258 * with EvDocument changes to allow setting a GdkScreen
259 * without setting a target.
261 gtk_widget_queue_resize (widget);
264 update_window_backgrounds (view);
268 ev_view_unrealize (GtkWidget *widget)
270 EvView *view = EV_VIEW (widget);
273 ev_document_set_target (view->document, NULL);
275 gdk_window_set_user_data (view->bin_window, NULL);
276 gdk_window_destroy (view->bin_window);
277 view->bin_window = NULL;
279 GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
283 ev_view_style_set (GtkWidget *widget,
284 GtkStyle *previous_style)
286 update_window_backgrounds (EV_VIEW (widget));
290 ev_view_state_changed (GtkWidget *widget,
291 GtkStateType previous_state)
293 update_window_backgrounds (EV_VIEW (widget));
297 expose_bin_window (GtkWidget *widget,
298 GdkEventExpose *event)
300 EvView *view = EV_VIEW (widget);
303 const EvFindResult *results;
305 if (view->document == NULL)
308 ev_document_render (view->document,
309 event->area.x, event->area.y,
310 event->area.width, event->area.height);
312 results = (EvFindResult*) view->find_results->data;
313 current_page = ev_document_get_page (view->document);
315 while (i < view->find_results->len) {
317 g_printerr ("highlighting result %d page %d at %d,%d %dx%d\n",
318 i, results[i].page_num,
319 results[i].highlight_area.x,
320 results[i].highlight_area.y,
321 results[i].highlight_area.width,
322 results[i].highlight_area.height);
324 if (results[i].page_num == current_page)
325 gdk_draw_rectangle (view->bin_window,
326 widget->style->base_gc[GTK_STATE_SELECTED],
328 results[i].highlight_area.x,
329 results[i].highlight_area.y,
330 results[i].highlight_area.width,
331 results[i].highlight_area.height);
337 ev_view_expose_event (GtkWidget *widget,
338 GdkEventExpose *event)
340 EvView *view = EV_VIEW (widget);
342 if (event->window == view->bin_window)
343 expose_bin_window (widget, event);
345 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
351 ev_view_button_press_event (GtkWidget *widget,
352 GdkEventButton *event)
354 /* EvView *view = EV_VIEW (widget); */
360 ev_view_motion_notify_event (GtkWidget *widget,
361 GdkEventMotion *event)
363 /* EvView *view = EV_VIEW (widget); */
369 ev_view_button_release_event (GtkWidget *widget,
370 GdkEventButton *event)
372 /* EvView *view = EV_VIEW (widget); */
378 on_adjustment_value_changed (GtkAdjustment *adjustment,
381 view_update_adjustments (view);
385 set_scroll_adjustment (EvView *view,
386 GtkOrientation orientation,
387 GtkAdjustment *adjustment)
389 GtkAdjustment **to_set;
391 if (orientation == GTK_ORIENTATION_HORIZONTAL)
392 to_set = &view->hadjustment;
394 to_set = &view->vadjustment;
396 if (*to_set != adjustment) {
398 g_signal_handlers_disconnect_by_func (*to_set,
399 (gpointer) on_adjustment_value_changed,
401 g_object_unref (*to_set);
404 *to_set = adjustment;
405 view_set_adjustment_values (view, orientation);
408 g_object_ref (*to_set);
409 g_signal_connect (*to_set, "value_changed",
410 G_CALLBACK (on_adjustment_value_changed), view);
416 ev_view_set_scroll_adjustments (EvView *view,
417 GtkAdjustment *hadjustment,
418 GtkAdjustment *vadjustment)
420 set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
421 set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
423 view_update_adjustments (view);
427 ev_view_class_init (EvViewClass *class)
429 GObjectClass *object_class = G_OBJECT_CLASS (class);
430 GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
431 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
433 object_class->finalize = ev_view_finalize;
435 widget_class->expose_event = ev_view_expose_event;
436 widget_class->button_press_event = ev_view_button_press_event;
437 widget_class->motion_notify_event = ev_view_motion_notify_event;
438 widget_class->button_release_event = ev_view_button_release_event;
439 widget_class->size_request = ev_view_size_request;
440 widget_class->size_allocate = ev_view_size_allocate;
441 widget_class->realize = ev_view_realize;
442 widget_class->unrealize = ev_view_unrealize;
443 widget_class->style_set = ev_view_style_set;
444 widget_class->state_changed = ev_view_state_changed;
445 gtk_object_class->destroy = ev_view_destroy;
447 class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
449 widget_class->set_scroll_adjustments_signal = g_signal_new ("set-scroll-adjustments",
450 G_OBJECT_CLASS_TYPE (object_class),
451 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
452 G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
454 ev_marshal_VOID__OBJECT_OBJECT,
457 GTK_TYPE_ADJUSTMENT);
458 page_changed_signal = g_signal_new ("page-changed",
459 G_OBJECT_CLASS_TYPE (object_class),
460 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
461 G_STRUCT_OFFSET (EvViewClass, page_changed),
463 ev_marshal_VOID__NONE,
466 g_signal_new ("find-status-changed",
467 G_OBJECT_CLASS_TYPE (object_class),
471 ev_marshal_VOID__NONE,
476 ev_view_init (EvView *view)
478 static const GdkColor white = { 0, 0xffff, 0xffff, 0xffff };
482 gtk_widget_modify_bg (GTK_WIDGET (view), GTK_STATE_NORMAL, &white);
484 view->find_results = g_array_new (FALSE,
486 sizeof (EvFindResult));
487 view->results_on_this_page = 0;
488 view->next_page_with_result = 0;
492 update_find_results (EvView *view)
494 const EvFindResult *results;
497 int next_page_with_result;
498 int earliest_page_with_result;
500 gboolean counts_changed;
502 results = (EvFindResult*) view->find_results->data;
503 current_page = ev_document_get_page (view->document);
504 next_page_with_result = 0;
506 earliest_page_with_result = 0;
509 while (i < view->find_results->len) {
510 if (results[i].page_num == current_page) {
513 int delta = results[i].page_num - current_page;
515 if (delta > 0 && /* result on later page */
516 (next_page_with_result == 0 ||
517 results[i].page_num < next_page_with_result))
518 next_page_with_result = results[i].page_num;
520 if (delta < 0 && /* result on a previous page */
521 (earliest_page_with_result == 0 ||
522 results[i].page_num < earliest_page_with_result))
523 earliest_page_with_result = results[i].page_num;
528 /* If earliest page is just the current page, there is no earliest page */
529 if (earliest_page_with_result == current_page)
530 earliest_page_with_result = 0;
532 /* If no next page, then wrap and the wrapped page is the next page */
533 if (next_page_with_result == 0)
534 next_page_with_result = earliest_page_with_result;
536 counts_changed = FALSE;
537 if (on_this_page != view->results_on_this_page ||
538 next_page_with_result != view->next_page_with_result) {
539 view->results_on_this_page = on_this_page;
540 view->next_page_with_result = next_page_with_result;
541 counts_changed = TRUE;
544 /* If there are no results at all, then the
545 * results of ev_view_get_find_status_message() will change
546 * to reflect the percent_complete so we have to emit the signal
548 if (counts_changed ||
549 view->find_results->len == 0) {
550 g_signal_emit_by_name (view,
551 "find-status-changed");
556 found_results_callback (EvDocument *document,
557 const EvFindResult *results,
559 double percent_complete,
562 EvView *view = EV_VIEW (data);
564 g_array_set_size (view->find_results, 0);
567 g_array_append_vals (view->find_results,
574 g_printerr ("%d results %d%%: ", n_results,
575 (int) (percent_complete * 100));
577 while (i < n_results) {
578 g_printerr ("%d ", results[i].page_num);
585 view->find_percent_complete = percent_complete;
586 update_find_results (view);
588 gtk_widget_queue_draw (GTK_WIDGET (view));
596 return g_object_new (EV_TYPE_VIEW, NULL);
600 document_changed_callback (EvDocument *document,
603 gtk_widget_queue_draw (GTK_WIDGET (view));
607 ev_view_set_document (EvView *view,
608 EvDocument *document)
610 g_return_if_fail (EV_IS_VIEW (view));
612 if (document != view->document) {
613 int old_page = ev_view_get_page (view);
615 if (view->document) {
616 g_signal_handlers_disconnect_by_func (view->document,
617 found_results_callback,
619 g_array_set_size (view->find_results, 0);
620 view->results_on_this_page = 0;
621 view->next_page_with_result = 0;
623 g_object_unref (view->document);
626 view->document = document;
628 if (view->document) {
629 g_object_ref (view->document);
630 g_signal_connect (view->document,
632 G_CALLBACK (found_results_callback),
634 g_signal_connect (view->document,
636 G_CALLBACK (document_changed_callback),
640 if (GTK_WIDGET_REALIZED (view))
641 ev_document_set_target (view->document, view->bin_window);
643 gtk_widget_queue_resize (GTK_WIDGET (view));
645 if (old_page != ev_view_get_page (view))
646 g_signal_emit (view, page_changed_signal, 0);
651 ev_view_set_page (EvView *view,
654 if (view->document) {
655 int old_page = ev_document_get_page (view->document);
656 if (old_page != page)
657 ev_document_set_page (view->document, page);
658 if (old_page != ev_document_get_page (view->document)) {
659 g_signal_emit (view, page_changed_signal, 0);
661 view->find_percent_complete = 0.0;
662 update_find_results (view);
668 ev_view_get_page (EvView *view)
671 return ev_document_get_page (view->document);
676 #define ZOOM_IN_FACTOR 1.2
677 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
679 #define MIN_SCALE 0.05409
680 #define MAX_SCALE 18.4884
683 ev_view_zoom (EvView *view,
690 scale = view->scale * factor;
694 view->scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
696 ev_document_set_scale (view->document, view->scale);
698 gtk_widget_queue_draw (GTK_WIDGET (view));
702 ev_view_zoom_in (EvView *view)
704 ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
708 ev_view_zoom_out (EvView *view)
710 ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
714 ev_view_normal_size (EvView *view)
716 ev_view_zoom (view, 1.0, FALSE);
720 ev_view_best_fit (EvView *view)
726 ev_document_get_page_size (view->document, &width, &height);
729 if (width != 0 && height != 0) {
730 double scale_w, scale_h;
732 scale_w = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
733 scale_h = (double)GTK_WIDGET (view)->allocation.height * view->scale / height;
735 scale = (scale_w < scale_h) ? scale_w : scale_h;
738 ev_view_zoom (view, scale, FALSE);
742 ev_view_fit_width (EvView *view)
748 ev_document_get_page_size (view->document, &width, NULL);
752 scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
754 ev_view_zoom (view, scale, FALSE);
758 ev_view_get_find_status_message (EvView *view)
760 if (view->find_results->len == 0) {
761 if (view->find_percent_complete >= (1.0 - 1e-10)) {
762 return g_strdup (_("Not found"));
764 return g_strdup_printf (_("%3d%% remaining to search"),
765 (int) ((1.0 - view->find_percent_complete) * 100));
767 } else if (view->results_on_this_page == 0) {
768 g_assert (view->next_page_with_result != 0);
769 return g_strdup_printf (_("Found on page %d"),
770 view->next_page_with_result);
772 return g_strdup_printf (_("%d found on this page"),
773 view->results_on_this_page);