shell/ev-view.c

   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
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   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.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #include <gtk/gtkalignment.h>
  22 #include <glib/gi18n.h>
  23 #include <gtk/gtkbindings.h>
  24 #include <gdk/gdkkeysyms.h>
  25
  26 #include "ev-marshal.h"
  27 #include "ev-view.h"
  28 #include "ev-document-find.h"
  29
  30 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  31 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  32 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  33
  34 struct _EvView {
  35         GtkWidget parent_instance;
  36
  37         EvDocument *document;
  38
  39         GdkWindow *bin_window;
  40
  41         int scroll_x;
  42         int scroll_y;
  43
  44         GtkAdjustment *hadjustment;
  45         GtkAdjustment *vadjustment;
  46
  47         GArray *find_results;
  48         int results_on_this_page;
  49         int next_page_with_result;
  50         double find_percent_complete;
  51
  52         double scale;
  53 };
  54
  55 struct _EvViewClass {
  56         GtkWidgetClass parent_class;
  57
  58         void    (*set_scroll_adjustments) (EvView         *view,
  59                                            GtkAdjustment  *hadjustment,
  60                                            GtkAdjustment  *vadjustment);
  61         void    (*scroll_view)            (EvView         *view,
  62                                            GtkScrollType   scroll,
  63                                            gboolean        horizontal);
  64
  65         /* Should this be notify::page? */
  66         void    (*page_changed)           (EvView         *view);
  67 };
  68
  69 static guint page_changed_signal = 0;
  70
  71 static void ev_view_set_scroll_adjustments (EvView         *view,
  72                                             GtkAdjustment  *hadjustment,
  73                                             GtkAdjustment  *vadjustment);
  74
  75 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
  76
  77 /*** Helper functions ***/
  78
  79 static void
  80 view_update_adjustments (EvView *view)
  81 {
  82         int old_x = view->scroll_x;
  83         int old_y = view->scroll_y;
  84
  85         if (view->hadjustment)
  86                 view->scroll_x = view->hadjustment->value;
  87         else
  88                 view->scroll_x = 0;
  89
  90         if (view->vadjustment)
  91                 view->scroll_y = view->vadjustment->value;
  92         else
  93                 view->scroll_y = 0;
  94
  95         if (GTK_WIDGET_REALIZED (view) &&
  96             (view->scroll_x != old_x || view->scroll_y != old_y)) {
  97                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
  98                 gdk_window_process_updates (view->bin_window, TRUE);
  99         }
 100 }
 101
 102 static void
 103 view_set_adjustment_values (EvView         *view,
 104                             GtkOrientation  orientation)
 105 {
 106         GtkWidget *widget = GTK_WIDGET (view);
 107         GtkAdjustment *adjustment;
 108         gboolean value_changed = FALSE;
 109         int requisition;
 110         int allocation;
 111
 112         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 113                 requisition = widget->requisition.width;
 114                 allocation = widget->allocation.width;
 115                 adjustment = view->hadjustment;
 116         } else {
 117                 requisition = widget->requisition.height;
 118                 allocation = widget->allocation.height;
 119                 adjustment = view->vadjustment;
 120         }
 121
 122         if (!adjustment)
 123                 return;
 124
 125         adjustment->page_size = allocation;
 126         adjustment->step_increment = allocation * 0.1;
 127         adjustment->page_increment = allocation * 0.9;
 128         adjustment->lower = 0;
 129         adjustment->upper = MAX (allocation, requisition);
 130
 131         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 132                 adjustment->value = adjustment->upper - adjustment->page_size;
 133                 value_changed = TRUE;
 134         }
 135
 136         gtk_adjustment_changed (adjustment);
 137         if (value_changed)
 138                 gtk_adjustment_value_changed (adjustment);
 139 }
 140
 141 /*** Virtual function implementations ***/
 142
 143 static void
 144 ev_view_finalize (GObject *object)
 145 {
 146         EvView *view = EV_VIEW (object);
 147
 148         if (view->document)
 149                 g_object_unref (view->document);
 150
 151         ev_view_set_scroll_adjustments (view, NULL, NULL);
 152
 153         g_array_free (view->find_results, TRUE);
 154         view->find_results = NULL;
 155
 156         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 157 }
 158
 159 static void
 160 ev_view_destroy (GtkObject *object)
 161 {
 162         EvView *view = EV_VIEW (object);
 163
 164         ev_view_set_scroll_adjustments (view, NULL, NULL);
 165
 166         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 167 }
 168
 169 static void
 170 ev_view_size_request (GtkWidget      *widget,
 171                       GtkRequisition *requisition)
 172 {
 173         EvView *view = EV_VIEW (widget);
 174
 175         if (GTK_WIDGET_REALIZED (widget)) {
 176                 if (view->document) {
 177                         ev_document_get_page_size (view->document,
 178                                                    &requisition->width,
 179                                                    &requisition->height);
 180                 } else {
 181                         requisition->width = 10;
 182                         requisition->height = 10;
 183                 }
 184         }
 185
 186 }
 187
 188 static void
 189 ev_view_size_allocate (GtkWidget      *widget,
 190                        GtkAllocation  *allocation)
 191 {
 192         EvView *view = EV_VIEW (widget);
 193
 194         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 195
 196         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 197         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 198
 199         if (GTK_WIDGET_REALIZED (widget)) {
 200                 gdk_window_resize (view->bin_window,
 201                                    MAX (widget->allocation.width, widget->requisition.width),
 202                                    MAX (widget->allocation.height, widget->requisition.height));
 203         }
 204 }
 205
 206 static void
 207 update_window_backgrounds (EvView *view)
 208 {
 209         GtkWidget *widget = GTK_WIDGET (view);
 210
 211         if (GTK_WIDGET_REALIZED (view)) {
 212                 gdk_window_set_background (view->bin_window,
 213                                            &widget->style->base[GTK_WIDGET_STATE (widget)]);
 214         }
 215 }
 216
 217 static void
 218 ev_view_realize (GtkWidget *widget)
 219 {
 220         EvView *view = EV_VIEW (widget);
 221         GdkWindowAttr attributes;
 222
 223         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 224
 225         attributes.window_type = GDK_WINDOW_CHILD;
 226         attributes.wclass = GDK_INPUT_OUTPUT;
 227         attributes.visual = gtk_widget_get_visual (widget);
 228         attributes.colormap = gtk_widget_get_colormap (widget);
 229
 230         attributes.x = widget->allocation.x;
 231         attributes.y = widget->allocation.y;
 232         attributes.width = widget->allocation.width;
 233         attributes.height = widget->allocation.height;
 234         attributes.event_mask = 0;
 235
 236         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 237                                          &attributes,
 238                                          GDK_WA_X | GDK_WA_Y |
 239                                          GDK_WA_COLORMAP |
 240                                          GDK_WA_VISUAL);
 241         gdk_window_set_user_data (widget->window, widget);
 242         widget->style = gtk_style_attach (widget->style, widget->window);
 243
 244         attributes.x = 0;
 245         attributes.y = 0;
 246         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 247         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 248         attributes.event_mask = GDK_EXPOSURE_MASK |
 249                                 GDK_SCROLL_MASK |
 250                                 GDK_KEY_PRESS_MASK;
 251
 252         view->bin_window = gdk_window_new (widget->window,
 253                                            &attributes,
 254                                            GDK_WA_X | GDK_WA_Y |
 255                                            GDK_WA_COLORMAP |
 256                                            GDK_WA_VISUAL);
 257         gdk_window_set_user_data (view->bin_window, widget);
 258         gdk_window_show (view->bin_window);
 259
 260         if (view->document) {
 261                 ev_document_set_target (view->document, view->bin_window);
 262
 263                 /* We can't get page size without a target, so we have to
 264                  * queue a size request at realization. Could be fixed
 265                  * with EvDocument changes to allow setting a GdkScreen
 266                  * without setting a target.
 267                  */
 268                 gtk_widget_queue_resize (widget);
 269         }
 270
 271         update_window_backgrounds (view);
 272 }
 273
 274 static void
 275 ev_view_unrealize (GtkWidget *widget)
 276 {
 277         EvView *view = EV_VIEW (widget);
 278
 279         if (view->document)
 280                 ev_document_set_target (view->document, NULL);
 281
 282         gdk_window_set_user_data (view->bin_window, NULL);
 283         gdk_window_destroy (view->bin_window);
 284         view->bin_window = NULL;
 285
 286         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 287 }
 288
 289 static void
 290 ev_view_style_set (GtkWidget      *widget,
 291                    GtkStyle       *previous_style)
 292 {
 293         update_window_backgrounds (EV_VIEW (widget));
 294 }
 295
 296 static void
 297 ev_view_state_changed (GtkWidget    *widget,
 298                        GtkStateType  previous_state)
 299 {
 300         update_window_backgrounds (EV_VIEW (widget));
 301 }
 302
 303 static void
 304 expose_bin_window (GtkWidget      *widget,
 305                    GdkEventExpose *event)
 306 {
 307         EvView *view = EV_VIEW (widget);
 308         int i;
 309         int current_page;
 310         const EvFindResult *results;
 311
 312         if (view->document == NULL)
 313                 return;
 314
 315         ev_document_render (view->document,
 316                             event->area.x, event->area.y,
 317                             event->area.width, event->area.height);
 318
 319         results = (EvFindResult*) view->find_results->data;
 320         current_page = ev_document_get_page (view->document);
 321         i = 0;
 322         while (i < view->find_results->len) {
 323 #if 0
 324                 g_printerr ("highlighting result %d page %d at %d,%d %dx%d\n",
 325                             i, results[i].page_num,
 326                             results[i].highlight_area.x,
 327                             results[i].highlight_area.y,
 328                             results[i].highlight_area.width,
 329                             results[i].highlight_area.height);
 330 #endif
 331                 if (results[i].page_num == current_page)
 332                         gdk_draw_rectangle (view->bin_window,
 333                                             widget->style->base_gc[GTK_STATE_SELECTED],
 334                                             FALSE,
 335                                             results[i].highlight_area.x,
 336                                             results[i].highlight_area.y,
 337                                             results[i].highlight_area.width,
 338                                             results[i].highlight_area.height);
 339                 ++i;
 340         }
 341 }
 342
 343 static gboolean
 344 ev_view_expose_event (GtkWidget      *widget,
 345                       GdkEventExpose *event)
 346 {
 347         EvView *view = EV_VIEW (widget);
 348
 349         if (event->window == view->bin_window)
 350                 expose_bin_window (widget, event);
 351         else
 352                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 353
 354         return FALSE;
 355 }
 356
 357 static gboolean
 358 ev_view_button_press_event (GtkWidget      *widget,
 359                             GdkEventButton *event)
 360 {
 361         /* EvView *view = EV_VIEW (widget); */
 362
 363         return FALSE;
 364 }
 365
 366 static gboolean
 367 ev_view_motion_notify_event (GtkWidget      *widget,
 368                              GdkEventMotion *event)
 369 {
 370         /* EvView *view = EV_VIEW (widget); */
 371
 372         return FALSE;
 373 }
 374
 375 static gboolean
 376 ev_view_button_release_event (GtkWidget      *widget,
 377                               GdkEventButton *event)
 378 {
 379         /* EvView *view = EV_VIEW (widget); */
 380
 381         return FALSE;
 382 }
 383
 384 static void
 385 on_adjustment_value_changed (GtkAdjustment  *adjustment,
 386                              EvView *view)
 387 {
 388         view_update_adjustments (view);
 389 }
 390
 391 static void
 392 set_scroll_adjustment (EvView *view,
 393                        GtkOrientation  orientation,
 394                        GtkAdjustment  *adjustment)
 395 {
 396         GtkAdjustment **to_set;
 397
 398         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 399                 to_set = &view->hadjustment;
 400         else
 401                 to_set = &view->vadjustment;
 402
 403         if (*to_set != adjustment) {
 404                 if (*to_set) {
 405                         g_signal_handlers_disconnect_by_func (*to_set,
 406                                                               (gpointer) on_adjustment_value_changed,
 407                                                               view);
 408                         g_object_unref (*to_set);
 409                 }
 410
 411                 *to_set = adjustment;
 412                 view_set_adjustment_values (view, orientation);
 413
 414                 if (*to_set) {
 415                         g_object_ref (*to_set);
 416                         g_signal_connect (*to_set, "value_changed",
 417                                           G_CALLBACK (on_adjustment_value_changed), view);
 418                 }
 419         }
 420 }
 421
 422 static void
 423 ev_view_set_scroll_adjustments (EvView *view,
 424                                 GtkAdjustment  *hadjustment,
 425                                 GtkAdjustment  *vadjustment)
 426 {
 427         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 428         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 429
 430         view_update_adjustments (view);
 431 }
 432
 433 static void
 434 add_scroll_binding (GtkBindingSet  *binding_set,
 435                     guint           keyval,
 436                     GtkScrollType   scroll,
 437                     gboolean        horizontal)
 438 {
 439   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 440
 441   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 442                                 "scroll_view", 2,
 443                                 GTK_TYPE_SCROLL_TYPE, scroll,
 444                                 G_TYPE_BOOLEAN, horizontal);
 445   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 446                                 "scroll_view", 2,
 447                                 GTK_TYPE_SCROLL_TYPE, scroll,
 448                                 G_TYPE_BOOLEAN, horizontal);
 449 }
 450
 451 static void
 452 ev_view_scroll_view (EvView *view,
 453                       GtkScrollType scroll,
 454                       gboolean horizontal)
 455 {
 456         GtkAdjustment *adjustment;
 457         double value;
 458
 459         if (horizontal) {
 460                 adjustment = view->hadjustment;
 461         } else {
 462                 adjustment = view->vadjustment;
 463         }
 464
 465         value = adjustment->value;
 466
 467         switch (scroll) {
 468                 case GTK_SCROLL_STEP_BACKWARD:
 469                         value -= adjustment->step_increment;
 470                         break;
 471                 case GTK_SCROLL_STEP_FORWARD:
 472                         value += adjustment->step_increment;
 473                         break;
 474                 case GTK_SCROLL_PAGE_BACKWARD:
 475                         value -= adjustment->page_increment;
 476                         break;
 477                 case GTK_SCROLL_PAGE_FORWARD:
 478                         value += adjustment->page_increment;
 479                         break;
 480                 default:
 481                         break;
 482         }
 483
 484         value = CLAMP (value, adjustment->lower, adjustment->upper - adjustment->page_size);
 485
 486         gtk_adjustment_set_value (adjustment, value);
 487 }
 488
 489 static void
 490 ev_view_class_init (EvViewClass *class)
 491 {
 492         GObjectClass *object_class = G_OBJECT_CLASS (class);
 493         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
 494         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 495         GtkBindingSet *binding_set;
 496
 497         object_class->finalize = ev_view_finalize;
 498
 499         widget_class->expose_event = ev_view_expose_event;
 500         widget_class->button_press_event = ev_view_button_press_event;
 501         widget_class->motion_notify_event = ev_view_motion_notify_event;
 502         widget_class->button_release_event = ev_view_button_release_event;
 503         widget_class->size_request = ev_view_size_request;
 504         widget_class->size_allocate = ev_view_size_allocate;
 505         widget_class->realize = ev_view_realize;
 506         widget_class->unrealize = ev_view_unrealize;
 507         widget_class->style_set = ev_view_style_set;
 508         widget_class->state_changed = ev_view_state_changed;
 509         gtk_object_class->destroy = ev_view_destroy;
 510
 511         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
 512         class->scroll_view = ev_view_scroll_view;
 513
 514         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
 515                                                                      G_OBJECT_CLASS_TYPE (object_class),
 516                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 517                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
 518                                                                      NULL, NULL,
 519                                                                      ev_marshal_VOID__OBJECT_OBJECT,
 520                                                                      G_TYPE_NONE, 2,
 521                                                                      GTK_TYPE_ADJUSTMENT,
 522                                                                      GTK_TYPE_ADJUSTMENT);
 523         page_changed_signal = g_signal_new ("page-changed",
 524                                             G_OBJECT_CLASS_TYPE (object_class),
 525                                             G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 526                                             G_STRUCT_OFFSET (EvViewClass, page_changed),
 527                                             NULL, NULL,
 528                                             ev_marshal_VOID__NONE,
 529                                             G_TYPE_NONE, 0);
 530
 531         g_signal_new ("find-status-changed",
 532                       G_OBJECT_CLASS_TYPE (object_class),
 533                       G_SIGNAL_RUN_LAST,
 534                       0,
 535                       NULL, NULL,
 536                       ev_marshal_VOID__NONE,
 537                       G_TYPE_NONE, 0);
 538
 539         g_signal_new ("scroll_view",
 540                       G_TYPE_FROM_CLASS (object_class),
 541                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 542                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
 543                       NULL, NULL,
 544                       ev_marshal_VOID__ENUM_BOOLEAN,
 545                       G_TYPE_NONE, 2,
 546                       GTK_TYPE_SCROLL_TYPE,
 547                       G_TYPE_BOOLEAN);
 548
 549         binding_set = gtk_binding_set_by_class (class);
 550
 551         add_scroll_binding (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
 552         add_scroll_binding (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
 553         add_scroll_binding (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
 554         add_scroll_binding (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
 555
 556         add_scroll_binding (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
 557         add_scroll_binding (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
 558 }
 559
 560 static void
 561 ev_view_init (EvView *view)
 562 {
 563         static const GdkColor white = { 0, 0xffff, 0xffff, 0xffff };
 564
 565         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
 566
 567         view->scale = 1.0;
 568
 569         gtk_widget_modify_bg (GTK_WIDGET (view), GTK_STATE_NORMAL, &white);
 570
 571         view->find_results = g_array_new (FALSE,
 572                                           FALSE,
 573                                           sizeof (EvFindResult));
 574         view->results_on_this_page = 0;
 575         view->next_page_with_result = 0;
 576 }
 577
 578 static void
 579 update_find_results (EvView *view)
 580 {
 581         const EvFindResult *results;
 582         int i;
 583         int on_this_page;
 584         int next_page_with_result;
 585         int earliest_page_with_result;
 586         int current_page;
 587         gboolean counts_changed;
 588
 589         results = (EvFindResult*) view->find_results->data;
 590         current_page = ev_document_get_page (view->document);
 591         next_page_with_result = 0;
 592         on_this_page = 0;
 593         earliest_page_with_result = 0;
 594
 595         i = 0;
 596         while (i < view->find_results->len) {
 597                 if (results[i].page_num == current_page) {
 598                         ++on_this_page;
 599                 } else {
 600                         int delta = results[i].page_num - current_page;
 601
 602                         if (delta > 0 && /* result on later page */
 603                             (next_page_with_result == 0 ||
 604                              results[i].page_num < next_page_with_result))
 605                                 next_page_with_result = results[i].page_num;
 606
 607                         if (delta < 0 && /* result on a previous page */
 608                             (earliest_page_with_result == 0 ||
 609                              results[i].page_num < earliest_page_with_result))
 610                                 earliest_page_with_result = results[i].page_num;
 611                 }
 612                 ++i;
 613         }
 614
 615         /* If earliest page is just the current page, there is no earliest page */
 616         if (earliest_page_with_result == current_page)
 617                 earliest_page_with_result = 0;
 618
 619         /* If no next page, then wrap and the wrapped page is the next page */
 620         if (next_page_with_result == 0)
 621                 next_page_with_result = earliest_page_with_result;
 622
 623         counts_changed = FALSE;
 624         if (on_this_page != view->results_on_this_page ||
 625             next_page_with_result != view->next_page_with_result) {
 626                 view->results_on_this_page = on_this_page;
 627                 view->next_page_with_result = next_page_with_result;
 628                 counts_changed = TRUE;
 629         }
 630
 631         /* If there are no results at all, then the
 632          * results of ev_view_get_find_status_message() will change
 633          * to reflect the percent_complete so we have to emit the signal
 634          */
 635         if (counts_changed ||
 636             view->find_results->len == 0) {
 637                 g_signal_emit_by_name (view,
 638                                        "find-status-changed");
 639         }
 640 }
 641
 642 static void
 643 found_results_callback (EvDocument         *document,
 644                         const EvFindResult *results,
 645                         int                 n_results,
 646                         double              percent_complete,
 647                         void               *data)
 648 {
 649   EvView *view = EV_VIEW (data);
 650
 651   g_array_set_size (view->find_results, 0);
 652
 653   if (n_results > 0)
 654           g_array_append_vals (view->find_results,
 655                                results, n_results);
 656
 657 #if 0
 658   {
 659           int i;
 660
 661           g_printerr ("%d results %d%%: ", n_results,
 662                       (int) (percent_complete * 100));
 663           i = 0;
 664           while (i < n_results) {
 665                   g_printerr ("%d ", results[i].page_num);
 666                   ++i;
 667           }
 668           g_printerr ("\n");
 669   }
 670 #endif
 671
 672   view->find_percent_complete = percent_complete;
 673   update_find_results (view);
 674
 675   gtk_widget_queue_draw (GTK_WIDGET (view));
 676 }
 677
 678 /*** Public API ***/
 679
 680 GtkWidget*
 681 ev_view_new (void)
 682 {
 683         return g_object_new (EV_TYPE_VIEW, NULL);
 684 }
 685
 686 static void
 687 document_changed_callback (EvDocument *document,
 688                            EvView     *view)
 689 {
 690         gtk_widget_queue_draw (GTK_WIDGET (view));
 691 }
 692
 693 void
 694 ev_view_set_document (EvView     *view,
 695                       EvDocument *document)
 696 {
 697         g_return_if_fail (EV_IS_VIEW (view));
 698
 699         if (document != view->document) {
 700                 int old_page = ev_view_get_page (view);
 701
 702                 if (view->document) {
 703                         g_signal_handlers_disconnect_by_func (view->document,
 704                                                               found_results_callback,
 705                                                               view);
 706                         g_array_set_size (view->find_results, 0);
 707                         view->results_on_this_page = 0;
 708                         view->next_page_with_result = 0;
 709
 710                         g_object_unref (view->document);
 711                 }
 712
 713                 view->document = document;
 714
 715                 if (view->document) {
 716                         g_object_ref (view->document);
 717                         g_signal_connect (view->document,
 718                                           "found",
 719                                           G_CALLBACK (found_results_callback),
 720                                           view);
 721                         g_signal_connect (view->document,
 722                                           "changed",
 723                                           G_CALLBACK (document_changed_callback),
 724                                           view);
 725                 }
 726
 727                 if (GTK_WIDGET_REALIZED (view))
 728                         ev_document_set_target (view->document, view->bin_window);
 729
 730                 gtk_widget_queue_resize (GTK_WIDGET (view));
 731
 732                 if (old_page != ev_view_get_page (view))
 733                         g_signal_emit (view, page_changed_signal, 0);
 734         }
 735 }
 736
 737 void
 738 ev_view_set_page (EvView *view,
 739                   int     page)
 740 {
 741         if (view->document) {
 742                 int old_page = ev_document_get_page (view->document);
 743                 if (old_page != page)
 744                         ev_document_set_page (view->document, page);
 745                 if (old_page != ev_document_get_page (view->document)) {
 746                         g_signal_emit (view, page_changed_signal, 0);
 747
 748                         view->find_percent_complete = 0.0;
 749                         update_find_results (view);
 750                 }
 751         }
 752 }
 753
 754 int
 755 ev_view_get_page (EvView *view)
 756 {
 757         if (view->document)
 758                 return ev_document_get_page (view->document);
 759         else
 760                 return 1;
 761 }
 762
 763 #define ZOOM_IN_FACTOR  1.2
 764 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
 765
 766 #define MIN_SCALE 0.05409
 767 #define MAX_SCALE 18.4884
 768
 769 static void
 770 ev_view_zoom (EvView   *view,
 771               double    factor,
 772               gboolean  relative)
 773 {
 774         double scale;
 775
 776         if (relative)
 777                 scale = view->scale * factor;
 778         else
 779                 scale = factor;
 780
 781         view->scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
 782
 783         ev_document_set_scale (view->document, view->scale);
 784
 785         gtk_widget_queue_draw (GTK_WIDGET (view));
 786 }
 787
 788 void
 789 ev_view_zoom_in (EvView *view)
 790 {
 791         ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
 792 }
 793
 794 void
 795 ev_view_zoom_out (EvView *view)
 796 {
 797         ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
 798 }
 799
 800 void
 801 ev_view_normal_size (EvView *view)
 802 {
 803         ev_view_zoom (view, 1.0, FALSE);
 804 }
 805
 806 void
 807 ev_view_best_fit (EvView *view)
 808 {
 809         double scale;
 810         int width, height;
 811
 812         width = height = 0;
 813         ev_document_get_page_size (view->document, &width, &height);
 814
 815         scale = 1.0;
 816         if (width != 0 && height != 0) {
 817                 double scale_w, scale_h;
 818
 819                 scale_w = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
 820                 scale_h = (double)GTK_WIDGET (view)->allocation.height * view->scale / height;
 821
 822                 scale = (scale_w < scale_h) ? scale_w : scale_h;
 823         }
 824
 825         ev_view_zoom (view, scale, FALSE);
 826 }
 827
 828 void
 829 ev_view_fit_width (EvView *view)
 830 {
 831         double scale = 1.0;
 832         int width;
 833
 834         width = 0;
 835         ev_document_get_page_size (view->document, &width, NULL);
 836
 837         scale = 1.0;
 838         if (width != 0)
 839                 scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
 840
 841         ev_view_zoom (view, scale, FALSE);
 842 }
 843
 844 char*
 845 ev_view_get_find_status_message (EvView *view)
 846 {
 847         if (view->find_results->len == 0) {
 848                 if (view->find_percent_complete >= (1.0 - 1e-10)) {
 849                         return g_strdup (_("Not found"));
 850                 } else {
 851                         return g_strdup_printf (_("%3d%% remaining to search"),
 852                                                 (int) ((1.0 - view->find_percent_complete) * 100));
 853                 }
 854         } else if (view->results_on_this_page == 0) {
 855                 g_assert (view->next_page_with_result != 0);
 856                 return g_strdup_printf (_("Found on page %d"),
 857                                         view->next_page_with_result);
 858         } else {
 859                 return g_strdup_printf (_("%d found on this page"),
 860                                         view->results_on_this_page);
 861         }
 862 }