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 <math.h>
  22 #include <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-document-find.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-debug.h"
  35 #include "ev-job-queue.h"
  36 #include "ev-page-cache.h"
  37 #include "ev-pixbuf-cache.h"
  38
  39 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  40 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  41 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  42
  43 enum {
  44         PROP_0,
  45         PROP_STATUS,
  46         PROP_FIND_STATUS
  47 };
  48
  49 enum {
  50   TARGET_STRING,
  51   TARGET_TEXT,
  52   TARGET_COMPOUND_TEXT,
  53   TARGET_UTF8_STRING,
  54   TARGET_TEXT_BUFFER_CONTENTS
  55 };
  56
  57 enum {
  58         EV_SCROLL_PAGE_FORWARD,
  59         EV_SCROLL_PAGE_BACKWARD
  60 };
  61
  62 static const GtkTargetEntry targets[] = {
  63         { "STRING", 0, TARGET_STRING },
  64         { "TEXT",   0, TARGET_TEXT },
  65         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  66         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  67 };
  68
  69 typedef enum {
  70         EV_VIEW_CURSOR_NORMAL,
  71         EV_VIEW_CURSOR_LINK,
  72         EV_VIEW_CURSOR_WAIT,
  73         EV_VIEW_CURSOR_HIDDEN
  74 } EvViewCursor;
  75
  76 #define ZOOM_IN_FACTOR  1.2
  77 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  78
  79 #define MIN_SCALE 0.05409
  80 #define MAX_SCALE 6.0
  81
  82 struct _EvView {
  83         GtkWidget parent_instance;
  84
  85         EvDocument *document;
  86
  87         GdkWindow *bin_window;
  88
  89         char *status;
  90         char *find_status;
  91
  92         int scroll_x;
  93         int scroll_y;
  94
  95         gboolean pressed_button;
  96         gboolean has_selection;
  97         GdkPoint selection_start;
  98         EvRectangle selection;
  99         EvViewCursor cursor;
 100
 101         GtkAdjustment *hadjustment;
 102         GtkAdjustment *vadjustment;
 103
 104         EvPageCache *page_cache;
 105         EvPixbufCache *pixbuf_cache;
 106
 107         gint current_page;
 108         EvJobRender *current_job;
 109
 110         int find_page;
 111         int find_result;
 112         int spacing;
 113
 114         double scale;
 115         int width;
 116         int height;
 117         GtkBorder border;
 118         gboolean show_border;
 119 };
 120
 121 struct _EvViewClass {
 122         GtkWidgetClass parent_class;
 123
 124         void    (*set_scroll_adjustments) (EvView         *view,
 125                                            GtkAdjustment  *hadjustment,
 126                                            GtkAdjustment  *vadjustment);
 127         void    (*scroll_view)            (EvView         *view,
 128                                            GtkScrollType   scroll,
 129                                            gboolean        horizontal);
 130
 131 };
 132
 133
 134 static void ev_view_set_scroll_adjustments (EvView         *view,
 135                                             GtkAdjustment  *hadjustment,
 136                                             GtkAdjustment  *vadjustment);
 137
 138 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 139
 140 /*** Helper functions ***/
 141
 142 static void
 143 view_update_adjustments (EvView *view)
 144 {
 145         int old_x = view->scroll_x;
 146         int old_y = view->scroll_y;
 147
 148         if (view->hadjustment)
 149                 view->scroll_x = view->hadjustment->value;
 150         else
 151                 view->scroll_x = 0;
 152
 153         if (view->vadjustment)
 154                 view->scroll_y = view->vadjustment->value;
 155         else
 156                 view->scroll_y = 0;
 157
 158         if (GTK_WIDGET_REALIZED (view) &&
 159             (view->scroll_x != old_x || view->scroll_y != old_y)) {
 160                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
 161                 gdk_window_process_updates (view->bin_window, TRUE);
 162         }
 163 }
 164
 165 static void
 166 view_set_adjustment_values (EvView         *view,
 167                             GtkOrientation  orientation)
 168 {
 169         GtkWidget *widget = GTK_WIDGET (view);
 170         GtkAdjustment *adjustment;
 171         gboolean value_changed = FALSE;
 172         int requisition;
 173         int allocation;
 174
 175         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 176                 requisition = widget->requisition.width;
 177                 allocation = widget->allocation.width;
 178                 adjustment = view->hadjustment;
 179         } else {
 180                 requisition = widget->requisition.height;
 181                 allocation = widget->allocation.height;
 182                 adjustment = view->vadjustment;
 183         }
 184
 185         if (!adjustment)
 186                 return;
 187
 188         adjustment->page_size = allocation;
 189         adjustment->step_increment = allocation * 0.1;
 190         adjustment->page_increment = allocation * 0.9;
 191         adjustment->lower = 0;
 192         adjustment->upper = MAX (allocation, requisition);
 193
 194         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 195                 adjustment->value = adjustment->upper - adjustment->page_size;
 196                 value_changed = TRUE;
 197         }
 198
 199         gtk_adjustment_changed (adjustment);
 200         if (value_changed)
 201                 gtk_adjustment_value_changed (adjustment);
 202 }
 203
 204 /*** Virtual function implementations ***/
 205
 206 static void
 207 ev_view_finalize (GObject *object)
 208 {
 209         EvView *view = EV_VIEW (object);
 210
 211         LOG ("Finalize");
 212
 213         g_free (view->status);
 214         g_free (view->find_status);
 215
 216         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 217 }
 218
 219 static void
 220 ev_view_destroy (GtkObject *object)
 221 {
 222         EvView *view = EV_VIEW (object);
 223
 224         if (view->document) {
 225                 g_object_unref (view->document);
 226                 view->document = NULL;
 227         }
 228         if (view->pixbuf_cache) {
 229                 g_object_unref (view->pixbuf_cache);
 230                 view->pixbuf_cache = NULL;
 231         }
 232         ev_view_set_scroll_adjustments (view, NULL, NULL);
 233
 234         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 235 }
 236
 237 static void
 238 ev_view_get_offsets (EvView *view, int *x_offset, int *y_offset)
 239 {
 240         EvDocument *document = view->document;
 241         GtkWidget *widget = GTK_WIDGET (view);
 242         int width, height, target_width, target_height;
 243
 244         g_return_if_fail (EV_IS_DOCUMENT (document));
 245
 246         ev_page_cache_get_size (view->page_cache,
 247                                 view->current_page,
 248                                 view->scale,
 249                                 &width, &height);
 250
 251         *x_offset = view->spacing;
 252         *y_offset = view->spacing;
 253         target_width = width + view->border.left +
 254                        view->border.right + view->spacing * 2;
 255         target_height = height + view->border.top +
 256                         view->border.bottom + view->spacing * 2;
 257         *x_offset += MAX (0, (widget->allocation.width - target_width) / 2);
 258         *y_offset += MAX (0, (widget->allocation.height - target_height) / 2);
 259 }
 260
 261 static void
 262 view_rect_to_doc_rect (EvView *view, GdkRectangle *view_rect, EvRectangle *doc_rect)
 263 {
 264         int x_offset, y_offset;
 265
 266         ev_view_get_offsets (view, &x_offset, &y_offset);
 267         doc_rect->x1 = (double) (view_rect->x - x_offset) / view->scale;
 268         doc_rect->y1 = (double) (view_rect->y - y_offset) / view->scale;
 269         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 270         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 271 }
 272
 273 static void
 274 doc_rect_to_view_rect (EvView *view, EvRectangle *doc_rect, GdkRectangle *view_rect)
 275 {
 276         int x_offset, y_offset;
 277
 278         ev_view_get_offsets (view, &x_offset, &y_offset);
 279         view_rect->x = floor (doc_rect->x1 * view->scale) + x_offset;
 280         view_rect->y = floor (doc_rect->y1 * view->scale) + y_offset;
 281         view_rect->width = ceil (doc_rect->x2 * view->scale) + x_offset - view_rect->x;
 282         view_rect->height = ceil (doc_rect->y2 * view->scale) + y_offset - view_rect->y;
 283 }
 284
 285 static void
 286 compute_border (EvView *view, int width, int height, GtkBorder *border)
 287 {
 288         if (view->show_border) {
 289                 ev_document_misc_get_page_border_size (width, height, border);
 290         } else {
 291                 border->left = 0;
 292                 border->right = 0;
 293                 border->top = 0;
 294                 border->bottom = 0;
 295         }
 296 }
 297
 298 static void
 299 compute_zoom_factor (EvView *view)
 300 {
 301         int doc_width, doc_height;
 302         double scale, scale_w, scale_h;
 303         GtkBorder border;
 304
 305         if (view->width <= 0 && view->height <= 0) {
 306                 return;
 307         }
 308
 309         doc_width = doc_height = 0;
 310         scale = scale_w = scale_h = 1.0;
 311         ev_page_cache_get_size (view->page_cache,
 312                                 view->current_page,
 313                                 1.0,
 314                                 &doc_width,
 315                                 &doc_height);
 316
 317         compute_border (view, doc_width, doc_height, &border);
 318
 319         if (doc_width == 0 || doc_height == 0) {
 320                 return;
 321         }
 322
 323         if (view->width >= 0) {
 324                 int target_width;
 325
 326                 target_width = view->width - (view->spacing * 2 + view->border.left +
 327                                               view->border.right);
 328                 scale = scale_w = (double)target_width / doc_width;
 329         }
 330
 331         if (view->height >= 0) {
 332                 int target_height;
 333
 334                 target_height = view->height - (view->spacing * 2 + view->border.top +
 335                                                 view->border.bottom);
 336                 scale = scale_h = (double)target_height / doc_height;
 337         }
 338
 339         if (view->width >= 0 && view->height >= 0) {
 340                 scale = (scale_w < scale_h) ? scale_w : scale_h;
 341         }
 342
 343         view->scale = scale;
 344 }
 345
 346 /* Called by size_request to make sure we have appropriate jobs running.
 347  */
 348 static void
 349 ev_view_size_request (GtkWidget      *widget,
 350                       GtkRequisition *requisition)
 351 {
 352         EvView *view = EV_VIEW (widget);
 353         gint width, height;
 354
 355         if (!GTK_WIDGET_REALIZED (widget))
 356                 return;
 357
 358         if (!view->document) {
 359                 requisition->width = 1;
 360                 requisition->height = 1;
 361                 return;
 362         }
 363
 364         compute_zoom_factor (view);
 365
 366         ev_page_cache_get_size (view->page_cache,
 367                                 view->current_page,
 368                                 view->scale,
 369                                 &width, &height);
 370
 371         compute_border (view, width, height, &(view->border));
 372
 373         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 374                                         view->current_page,
 375                                         view->current_page,
 376                                         view->scale);
 377
 378         if (view->width >= 0) {
 379                 requisition->width = 0;
 380         } else {
 381                 requisition->width = width + view->border.left +
 382                                      view->border.right + view->spacing * 2;
 383         }
 384
 385         if (view->height >= 0) {
 386                 requisition->height = 0;
 387         } else {
 388                 requisition->height = height + view->border.top +
 389                                       view->border.bottom + view->spacing * 2;
 390         }
 391 }
 392
 393 static void
 394 ev_view_size_allocate (GtkWidget      *widget,
 395                        GtkAllocation  *allocation)
 396 {
 397         EvView *view = EV_VIEW (widget);
 398
 399         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 400
 401         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 402         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 403
 404         if (GTK_WIDGET_REALIZED (widget)) {
 405                 gdk_window_resize (view->bin_window,
 406                                    MAX (widget->allocation.width, widget->requisition.width),
 407                                    MAX (widget->allocation.height, widget->requisition.height));
 408         }
 409 }
 410
 411 static void
 412 ev_view_realize (GtkWidget *widget)
 413 {
 414         EvView *view = EV_VIEW (widget);
 415         GdkWindowAttr attributes;
 416
 417         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 418
 419
 420         attributes.window_type = GDK_WINDOW_CHILD;
 421         attributes.wclass = GDK_INPUT_OUTPUT;
 422         attributes.visual = gtk_widget_get_visual (widget);
 423         attributes.colormap = gtk_widget_get_colormap (widget);
 424
 425         attributes.x = widget->allocation.x;
 426         attributes.y = widget->allocation.y;
 427         attributes.width = widget->allocation.width;
 428         attributes.height = widget->allocation.height;
 429         attributes.event_mask = 0;
 430
 431         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 432                                          &attributes,
 433                                          GDK_WA_X | GDK_WA_Y |
 434                                          GDK_WA_COLORMAP |
 435                                          GDK_WA_VISUAL);
 436         gdk_window_set_user_data (widget->window, widget);
 437         widget->style = gtk_style_attach (widget->style, widget->window);
 438         gdk_window_set_background (widget->window, &widget->style->mid[widget->state]);
 439
 440         attributes.x = 0;
 441         attributes.y = 0;
 442         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 443         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 444         attributes.event_mask = GDK_EXPOSURE_MASK |
 445                                 GDK_BUTTON_PRESS_MASK |
 446                                 GDK_BUTTON_RELEASE_MASK |
 447                                 GDK_SCROLL_MASK |
 448                                 GDK_KEY_PRESS_MASK |
 449                                 GDK_POINTER_MOTION_MASK |
 450                                 GDK_LEAVE_NOTIFY_MASK;
 451
 452         view->bin_window = gdk_window_new (widget->window,
 453                                            &attributes,
 454                                            GDK_WA_X | GDK_WA_Y |
 455                                            GDK_WA_COLORMAP |
 456                                            GDK_WA_VISUAL);
 457         gdk_window_set_user_data (view->bin_window, widget);
 458         gdk_window_show (view->bin_window);
 459
 460         widget->style = gtk_style_attach (widget->style, view->bin_window);
 461         gdk_window_set_background (view->bin_window, &widget->style->mid[widget->state]);
 462
 463         if (view->document) {
 464                 /* We can't get page size without a target, so we have to
 465                  * queue a size request at realization. Could be fixed
 466                  * with EvDocument changes to allow setting a GdkScreen
 467                  * without setting a target.
 468                  */
 469                 gtk_widget_queue_resize (widget);
 470         }
 471 }
 472
 473 static void
 474 ev_view_unrealize (GtkWidget *widget)
 475 {
 476         EvView *view = EV_VIEW (widget);
 477
 478         gdk_window_set_user_data (view->bin_window, NULL);
 479         gdk_window_destroy (view->bin_window);
 480         view->bin_window = NULL;
 481
 482         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 483 }
 484
 485 static guint32
 486 ev_gdk_color_to_rgb (const GdkColor *color)
 487 {
 488   guint32 result;
 489   result = (0xff0000 | (color->red & 0xff00));
 490   result <<= 8;
 491   result |= ((color->green & 0xff00) | (color->blue >> 8));
 492   return result;
 493 }
 494
 495 static void
 496 draw_rubberband (GtkWidget *widget, GdkWindow *window,
 497                  const GdkRectangle *rect, guchar alpha)
 498 {
 499         GdkGC *gc;
 500         GdkPixbuf *pixbuf;
 501         GdkColor *fill_color_gdk;
 502         guint fill_color;
 503
 504         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
 505         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
 506
 507         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 508                                  rect->width, rect->height);
 509         gdk_pixbuf_fill (pixbuf, fill_color);
 510
 511         gdk_draw_pixbuf (window, NULL, pixbuf,
 512                          0, 0,
 513                          rect->x, rect->y,
 514                          rect->width, rect->height,
 515                          GDK_RGB_DITHER_NONE,
 516                          0, 0);
 517
 518         g_object_unref (pixbuf);
 519
 520         gc = gdk_gc_new (window);
 521         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
 522         gdk_draw_rectangle (window, gc, FALSE,
 523                             rect->x, rect->y,
 524                             rect->width - 1,
 525                             rect->height - 1);
 526         g_object_unref (gc);
 527
 528         gdk_color_free (fill_color_gdk);
 529 }
 530
 531 static void
 532 highlight_find_results (EvView *view)
 533 {
 534         EvDocumentFind *find;
 535         int i, results = 0;
 536
 537         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
 538
 539         find = EV_DOCUMENT_FIND (view->document);
 540
 541         results = ev_document_find_get_n_results (find, view->current_page);
 542
 543         for (i = 0; i < results; i++) {
 544                 EvRectangle rectangle;
 545                 GdkRectangle view_rectangle;
 546                 guchar alpha;
 547
 548                 alpha = (i == view->find_result) ? 0x90 : 0x20;
 549                 ev_document_find_get_result (find, view->current_page,
 550                                              i, &rectangle);
 551                 doc_rect_to_view_rect (view, &rectangle, &view_rectangle);
 552                 draw_rubberband (GTK_WIDGET (view), view->bin_window,
 553                                  &view_rectangle, alpha);
 554         }
 555 }
 556
 557
 558 static void
 559 expose_bin_window (GtkWidget      *widget,
 560                    GdkEventExpose *event)
 561 {
 562         EvView *view = EV_VIEW (widget);
 563         gint width, height;
 564         GdkRectangle area;
 565         int x_offset, y_offset;
 566         GdkPixbuf *scaled_image;
 567         GdkPixbuf *current_pixbuf;
 568
 569         if (view->document == NULL)
 570                 return;
 571
 572         ev_view_get_offsets (view, &x_offset, &y_offset);
 573         ev_page_cache_get_size (view->page_cache,
 574                                 view->current_page,
 575                                 view->scale,
 576                                 &width, &height);
 577
 578         /* Paint the frame */
 579         area.x = x_offset;
 580         area.y = y_offset;
 581         area.width = width + view->border.left + view->border.right;
 582         area.height = height + view->border.top + view->border.bottom;
 583
 584         if (view->show_border) {
 585                 ev_document_misc_paint_one_page (view->bin_window, widget, &area,
 586                                                  &(view->border));
 587         }
 588
 589         /* Render the document itself */
 590         LOG ("Render area %d %d %d %d - Offset %d %d",
 591              event->area.x, event->area.y,
 592              event->area.width, event->area.height,
 593              x_offset, y_offset);
 594
 595         current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, view->current_page);
 596
 597         if (current_pixbuf == NULL)
 598                 scaled_image = NULL;
 599         else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
 600                  height == gdk_pixbuf_get_height (current_pixbuf))
 601                 scaled_image = g_object_ref (current_pixbuf);
 602         else
 603                 scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
 604                                                         width, height,
 605                                                         GDK_INTERP_NEAREST);
 606         if (scaled_image) {
 607                 gdk_draw_pixbuf (view->bin_window,
 608                                  GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
 609                                  scaled_image,
 610                                  0, 0,
 611                                  area.x + view->border.left,
 612                                  area.y + view->border.top,
 613                                  width, height,
 614                                  GDK_RGB_DITHER_NORMAL,
 615                                  0, 0);
 616                 g_object_unref (scaled_image);
 617         }
 618
 619         if (EV_IS_DOCUMENT_FIND (view->document)) {
 620                 highlight_find_results (view);
 621         }
 622
 623         if (view->has_selection) {
 624                 GdkRectangle rubberband;
 625
 626                 doc_rect_to_view_rect (view, &view->selection, &rubberband);
 627                 if (rubberband.width > 0 && rubberband.height > 0) {
 628                         draw_rubberband (widget, view->bin_window,
 629                                          &rubberband, 0x40);
 630                 }
 631         }
 632 }
 633
 634 static gboolean
 635 ev_view_expose_event (GtkWidget      *widget,
 636                       GdkEventExpose *event)
 637 {
 638         EvView *view = EV_VIEW (widget);
 639
 640         if (event->window == view->bin_window)
 641                 expose_bin_window (widget, event);
 642         else
 643                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 644
 645         return FALSE;
 646 }
 647
 648 void
 649 ev_view_select_all (EvView *ev_view)
 650 {
 651         GtkWidget *widget = GTK_WIDGET (ev_view);
 652         GdkRectangle selection;
 653         int width, height;
 654         int x_offset, y_offset;
 655
 656         g_return_if_fail (EV_IS_VIEW (ev_view));
 657
 658
 659         ev_view_get_offsets (ev_view, &x_offset, &y_offset);
 660         ev_page_cache_get_size (ev_view->page_cache,
 661                                 ev_view->current_page,
 662                                 ev_view->scale,
 663                                 &width, &height);
 664
 665         ev_view->has_selection = TRUE;
 666         selection.x = x_offset + ev_view->border.left;
 667         selection.y = y_offset + ev_view->border.top;
 668         selection.width = width;
 669         selection.height = height;
 670         view_rect_to_doc_rect (ev_view, &selection, &ev_view->selection);
 671
 672         gtk_widget_queue_draw (widget);
 673 }
 674
 675 void
 676 ev_view_copy (EvView *ev_view)
 677 {
 678         GtkClipboard *clipboard;
 679         char *text;
 680
 681         if (!ev_document_can_get_text (ev_view->document)) {
 682                 return;
 683         }
 684
 685         ev_document_doc_mutex_lock ();
 686         text = ev_document_get_text (ev_view->document,
 687                                      ev_view->current_page,
 688                                      &ev_view->selection);
 689         ev_document_doc_mutex_unlock ();
 690
 691         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 692                                               GDK_SELECTION_CLIPBOARD);
 693         gtk_clipboard_set_text (clipboard, text, -1);
 694         g_free (text);
 695 }
 696
 697 void
 698 ev_view_set_show_border (EvView *view, gboolean show_border)
 699 {
 700         g_return_if_fail (EV_IS_VIEW (view));
 701
 702         view->show_border = show_border;
 703
 704         gtk_widget_queue_resize (GTK_WIDGET (view));
 705 }
 706
 707 static void
 708 ev_view_primary_get_cb (GtkClipboard     *clipboard,
 709                         GtkSelectionData *selection_data,
 710                         guint             info,
 711                         gpointer          data)
 712 {
 713         EvView *ev_view = EV_VIEW (data);
 714         char *text;
 715
 716         if (!ev_document_can_get_text (ev_view->document)) {
 717                 return;
 718         }
 719
 720         ev_document_doc_mutex_lock ();
 721         text = ev_document_get_text (ev_view->document,
 722                                      ev_view->current_page,
 723                                      &ev_view->selection);
 724         ev_document_doc_mutex_unlock ();
 725         gtk_selection_data_set_text (selection_data, text, -1);
 726 }
 727
 728 static void
 729 ev_view_primary_clear_cb (GtkClipboard *clipboard,
 730                           gpointer      data)
 731 {
 732         EvView *ev_view = EV_VIEW (data);
 733
 734         ev_view->has_selection = FALSE;
 735 }
 736
 737 static void
 738 ev_view_update_primary_selection (EvView *ev_view)
 739 {
 740         GtkClipboard *clipboard;
 741
 742         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 743                                               GDK_SELECTION_PRIMARY);
 744
 745         if (ev_view->has_selection) {
 746                 if (!gtk_clipboard_set_with_owner (clipboard,
 747                                                    targets,
 748                                                    G_N_ELEMENTS (targets),
 749                                                    ev_view_primary_get_cb,
 750                                                    ev_view_primary_clear_cb,
 751                                                    G_OBJECT (ev_view)))
 752                         ev_view_primary_clear_cb (clipboard, ev_view);
 753         } else {
 754                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
 755                         gtk_clipboard_clear (clipboard);
 756         }
 757 }
 758
 759 static gboolean
 760 ev_view_button_press_event (GtkWidget      *widget,
 761                             GdkEventButton *event)
 762 {
 763         EvView *view = EV_VIEW (widget);
 764
 765         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
 766                 gtk_widget_grab_focus (widget);
 767         }
 768
 769         view->pressed_button = event->button;
 770
 771         switch (event->button) {
 772                 case 1:
 773                         if (view->has_selection) {
 774                                 view->has_selection = FALSE;
 775                                 gtk_widget_queue_draw (widget);
 776                         }
 777
 778                         view->selection_start.x = event->x;
 779                         view->selection_start.y = event->y;
 780                         break;
 781         }
 782
 783         return TRUE;
 784 }
 785
 786 static char *
 787 status_message_from_link (EvView *view, EvLink *link)
 788 {
 789         EvLinkType type;
 790         char *msg = NULL;
 791         char *page_label;
 792
 793         type = ev_link_get_link_type (link);
 794
 795         switch (type) {
 796                 case EV_LINK_TYPE_TITLE:
 797                         if (ev_link_get_title (link))
 798                                 msg = g_strdup (ev_link_get_title (link));
 799                         break;
 800                 case EV_LINK_TYPE_PAGE:
 801                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
 802                         msg = g_strdup_printf (_("Go to page %s"), page_label);
 803                         g_free (page_label);
 804                         break;
 805                 case EV_LINK_TYPE_EXTERNAL_URI:
 806                         msg = g_strdup (ev_link_get_uri (link));
 807                         break;
 808                 default:
 809                         break;
 810         }
 811
 812         return msg;
 813 }
 814
 815 static void
 816 ev_view_set_status (EvView *view, const char *message)
 817 {
 818         g_return_if_fail (EV_IS_VIEW (view));
 819
 820         if (message != view->status) {
 821                 g_free (view->status);
 822                 view->status = g_strdup (message);
 823                 g_object_notify (G_OBJECT (view), "status");
 824         }
 825 }
 826
 827 static void
 828 ev_view_set_find_status (EvView *view, const char *message)
 829 {
 830         g_return_if_fail (EV_IS_VIEW (view));
 831
 832         g_free (view->find_status);
 833         view->find_status = g_strdup (message);
 834         g_object_notify (G_OBJECT (view), "find-status");
 835 }
 836
 837 static GdkCursor *
 838 ev_view_create_invisible_cursor(void)
 839 {
 840        GdkBitmap *empty;
 841        GdkColor black = { 0, 0, 0, 0 };
 842        static char bits[] = { 0x00 };
 843
 844        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
 845
 846        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
 847 }
 848
 849 static void
 850 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
 851 {
 852         GdkCursor *cursor = NULL;
 853         GdkDisplay *display;
 854         GtkWidget *widget;
 855
 856         if (view->cursor == new_cursor) {
 857                 return;
 858         }
 859
 860         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
 861         display = gtk_widget_get_display (widget);
 862         view->cursor = new_cursor;
 863
 864         switch (new_cursor) {
 865                 case EV_VIEW_CURSOR_NORMAL:
 866                         gdk_window_set_cursor (widget->window, NULL);
 867                         break;
 868                 case EV_VIEW_CURSOR_LINK:
 869                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
 870                         break;
 871                 case EV_VIEW_CURSOR_WAIT:
 872                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
 873                         break;
 874                 case EV_VIEW_CURSOR_HIDDEN:
 875                         cursor = ev_view_create_invisible_cursor ();
 876                         break;
 877
 878         }
 879
 880         if (cursor) {
 881                 gdk_window_set_cursor (widget->window, cursor);
 882                 gdk_cursor_unref (cursor);
 883                 gdk_flush();
 884         }
 885 }
 886
 887
 888 static void
 889 find_page_at_location (EvView  *view,
 890                        gdouble  x,
 891                        gdouble  y,
 892                        gint    *page,
 893                        gint    *x_offset,
 894                        gint    *y_offset)
 895 {
 896         gint width, height;
 897
 898         ev_page_cache_get_size (view->page_cache,
 899                                 view->current_page,
 900                                 view->scale,
 901                                 &width, &height);
 902
 903         x -= (view->border.left + view->spacing);
 904         y -= (view->border.top + view->spacing);
 905
 906         if ((x < 0) || (y < 0) ||
 907             (x >= width) || (y >= height)) {
 908                 *page = -1;
 909                 return;
 910         }
 911         *page = view->current_page;
 912         *x_offset = (gint) x;
 913         *y_offset = (gint) y;
 914 }
 915
 916 static EvLink *
 917 get_link_at_location (EvView  *view,
 918                       gdouble  x,
 919                       gdouble  y)
 920 {
 921         gint page;
 922         gint x_offset, y_offset;
 923         GList *link_mapping;
 924
 925         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 926         if (page == -1)
 927                 return NULL;
 928
 929         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 930
 931         return ev_link_mapping_find (link_mapping, x_offset /view->scale, y_offset /view->scale);
 932 }
 933
 934
 935 static gboolean
 936 ev_view_motion_notify_event (GtkWidget      *widget,
 937                              GdkEventMotion *event)
 938 {
 939         EvView *view = EV_VIEW (widget);
 940
 941         if (view->pressed_button > 0) {
 942                 GdkRectangle selection;
 943
 944                 view->has_selection = TRUE;
 945                 selection.x = MIN (view->selection_start.x, event->x);
 946                 selection.y = MIN (view->selection_start.y, event->y);
 947                 selection.width = ABS (view->selection_start.x - event->x) + 1;
 948                 selection.height = ABS (view->selection_start.y - event->y) + 1;
 949                 view_rect_to_doc_rect (view, &selection, &view->selection);
 950
 951                 gtk_widget_queue_draw (widget);
 952         } else if (view->document) {
 953                 EvLink *link;
 954
 955                 link = get_link_at_location (view, event->x, event->y);
 956                 if (link) {
 957                         char *msg;
 958
 959                         msg = status_message_from_link (view, link);
 960                         ev_view_set_status (view, msg);
 961                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
 962                         g_free (msg);
 963                 } else {
 964                         ev_view_set_status (view, NULL);
 965                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
 966                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
 967                         }
 968                 }
 969         }
 970
 971         return TRUE;
 972 }
 973
 974 /* FIXME: standardize this sometime */
 975 static void
 976 go_to_link (EvView *view, EvLink *link)
 977 {
 978         EvLinkType type;
 979         const char *uri;
 980         int page;
 981
 982         type = ev_link_get_link_type (link);
 983
 984         switch (type) {
 985                 case EV_LINK_TYPE_TITLE:
 986                         break;
 987                 case EV_LINK_TYPE_PAGE:
 988                         page = ev_link_get_page (link);
 989                         ev_page_cache_set_current_page (view->page_cache, page);
 990                         break;
 991                 case EV_LINK_TYPE_EXTERNAL_URI:
 992                         uri = ev_link_get_uri (link);
 993                         gnome_vfs_url_show (uri);
 994                         break;
 995         }
 996 }
 997
 998
 999 static gboolean
1000 ev_view_button_release_event (GtkWidget      *widget,
1001                               GdkEventButton *event)
1002 {
1003         EvView *view = EV_VIEW (widget);
1004
1005         view->pressed_button = -1;
1006
1007         if (view->has_selection) {
1008                 ev_view_update_primary_selection (view);
1009         } else if (view->document) {
1010                 EvLink *link;
1011
1012                 link = get_link_at_location (view, event->x, event->y);
1013                 if (link) {
1014                         go_to_link (view, link);
1015                 }
1016         }
1017
1018         return FALSE;
1019 }
1020
1021 static void
1022 on_adjustment_value_changed (GtkAdjustment  *adjustment,
1023                              EvView *view)
1024 {
1025         view_update_adjustments (view);
1026 }
1027
1028 static void
1029 set_scroll_adjustment (EvView *view,
1030                        GtkOrientation  orientation,
1031                        GtkAdjustment  *adjustment)
1032 {
1033         GtkAdjustment **to_set;
1034
1035         if (orientation == GTK_ORIENTATION_HORIZONTAL)
1036                 to_set = &view->hadjustment;
1037         else
1038                 to_set = &view->vadjustment;
1039
1040         if (*to_set != adjustment) {
1041                 if (*to_set) {
1042                         g_signal_handlers_disconnect_by_func (*to_set,
1043                                                               (gpointer) on_adjustment_value_changed,
1044                                                               view);
1045                         g_object_unref (*to_set);
1046                 }
1047
1048                 *to_set = adjustment;
1049                 view_set_adjustment_values (view, orientation);
1050
1051                 if (*to_set) {
1052                         g_object_ref (*to_set);
1053                         g_signal_connect (*to_set, "value_changed",
1054                                           G_CALLBACK (on_adjustment_value_changed), view);
1055                 }
1056         }
1057 }
1058
1059 static void
1060 ev_view_set_scroll_adjustments (EvView *view,
1061                                 GtkAdjustment  *hadjustment,
1062                                 GtkAdjustment  *vadjustment)
1063 {
1064         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
1065         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
1066
1067         view_update_adjustments (view);
1068 }
1069
1070 static void
1071 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
1072                            guint           keyval,
1073                            GtkScrollType   scroll,
1074                            gboolean        horizontal)
1075 {
1076   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
1077
1078   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1079                                 "scroll_view", 2,
1080                                 GTK_TYPE_SCROLL_TYPE, scroll,
1081                                 G_TYPE_BOOLEAN, horizontal);
1082   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
1083                                 "scroll_view", 2,
1084                                 GTK_TYPE_SCROLL_TYPE, scroll,
1085                                 G_TYPE_BOOLEAN, horizontal);
1086 }
1087
1088 static void
1089 add_scroll_binding_shifted (GtkBindingSet  *binding_set,
1090                             guint           keyval,
1091                             GtkScrollType   scroll_normal,
1092                             GtkScrollType   scroll_shifted,
1093                             gboolean        horizontal)
1094 {
1095   gtk_binding_entry_add_signal (binding_set, keyval, 0,
1096                                 "scroll_view", 2,
1097                                 GTK_TYPE_SCROLL_TYPE, scroll_normal,
1098                                 G_TYPE_BOOLEAN, horizontal);
1099   gtk_binding_entry_add_signal (binding_set, keyval, GDK_SHIFT_MASK,
1100                                 "scroll_view", 2,
1101                                 GTK_TYPE_SCROLL_TYPE, scroll_shifted,
1102                                 G_TYPE_BOOLEAN, horizontal);
1103 }
1104
1105 static void
1106 ev_view_jump (EvView        *view,
1107               GtkScrollType  scroll)
1108 {
1109         GtkAdjustment *adjustment;
1110         double value, increment;
1111         gboolean first_page = FALSE;
1112         gboolean last_page = FALSE;
1113
1114         /* Assign values for increment and vertical adjustment */
1115         adjustment = view->vadjustment;
1116         increment = adjustment->page_size * 0.75;
1117         value = adjustment->value;
1118
1119         /* Assign boolean for first and last page */
1120         if (view->current_page == 0)
1121                 first_page = TRUE;
1122         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
1123                 last_page = TRUE;
1124
1125         switch (scroll) {
1126                 case EV_SCROLL_PAGE_BACKWARD:
1127                         /* Do not jump backwards if at the first page */
1128                         if (value == (adjustment->lower) && first_page) {
1129                                 /* Do nothing */
1130                                 /* At the top of a page, assign the upper bound limit of previous page */
1131                         } else if (value == (adjustment->lower)) {
1132                                 value = adjustment->upper - adjustment->page_size;
1133                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
1134                                 /* Jump to the top */
1135                         } else {
1136                                 value = MAX (value - increment, adjustment->lower);
1137                         }
1138                         break;
1139                 case EV_SCROLL_PAGE_FORWARD:
1140                         /* Do not jump forward if at the last page */
1141                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
1142                                 /* Do nothing */
1143                         /* At the bottom of a page, assign the lower bound limit of next page */
1144                         } else if (value == (adjustment->upper - adjustment->page_size)) {
1145                                 value = 0;
1146                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
1147                         /* Jump to the bottom */
1148                         } else {
1149                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
1150                         }
1151                         break;
1152                 default:
1153                         break;
1154         }
1155
1156         gtk_adjustment_set_value (adjustment, value);
1157 }
1158
1159 static void
1160 ev_view_scroll_view (EvView *view,
1161                      GtkScrollType scroll,
1162                      gboolean horizontal)
1163 {
1164         if (scroll == GTK_SCROLL_PAGE_BACKWARD) {
1165                 ev_page_cache_prev_page (view->page_cache);
1166         } else if (scroll == GTK_SCROLL_PAGE_FORWARD) {
1167                 ev_page_cache_next_page (view->page_cache);
1168         } else if (scroll == EV_SCROLL_PAGE_BACKWARD || scroll == EV_SCROLL_PAGE_FORWARD) {
1169                 ev_view_jump (view, scroll);
1170         } else {
1171                 GtkAdjustment *adjustment;
1172                 double value;
1173
1174                 if (horizontal) {
1175                         adjustment = view->hadjustment;
1176                 } else {
1177                         adjustment = view->vadjustment;
1178                 }
1179
1180                 value = adjustment->value;
1181
1182                 switch (scroll) {
1183                         case GTK_SCROLL_STEP_BACKWARD:
1184                                 value -= adjustment->step_increment;
1185                                 break;
1186                         case GTK_SCROLL_STEP_FORWARD:
1187                                 value += adjustment->step_increment;
1188                                 break;
1189                         default:
1190                                 break;
1191                 }
1192
1193                 value = CLAMP (value, adjustment->lower,
1194                                adjustment->upper - adjustment->page_size);
1195
1196                 gtk_adjustment_set_value (adjustment, value);
1197         }
1198 }
1199
1200 static void
1201 ev_view_set_property (GObject *object,
1202                       guint prop_id,
1203                       const GValue *value,
1204                       GParamSpec *pspec)
1205 {
1206         switch (prop_id)
1207         {
1208                 /* Read only */
1209                 case PROP_STATUS:
1210                 case PROP_FIND_STATUS:
1211                         break;
1212         }
1213 }
1214
1215 static void
1216 ev_view_get_property (GObject *object,
1217                       guint prop_id,
1218                       GValue *value,
1219                       GParamSpec *pspec)
1220 {
1221         EvView *view = EV_VIEW (object);
1222
1223         switch (prop_id)
1224         {
1225                 case PROP_STATUS:
1226                         g_value_set_string (value, view->status);
1227                         break;
1228                 case PROP_FIND_STATUS:
1229                         g_value_set_string (value, view->status);
1230                         break;
1231         }
1232 }
1233
1234 static void
1235 ev_view_class_init (EvViewClass *class)
1236 {
1237         GObjectClass *object_class = G_OBJECT_CLASS (class);
1238         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1239         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1240         GtkBindingSet *binding_set;
1241
1242         object_class->finalize = ev_view_finalize;
1243         object_class->set_property = ev_view_set_property;
1244         object_class->get_property = ev_view_get_property;
1245
1246         widget_class->expose_event = ev_view_expose_event;
1247         widget_class->button_press_event = ev_view_button_press_event;
1248         widget_class->motion_notify_event = ev_view_motion_notify_event;
1249         widget_class->button_release_event = ev_view_button_release_event;
1250         widget_class->size_request = ev_view_size_request;
1251         widget_class->size_allocate = ev_view_size_allocate;
1252         widget_class->realize = ev_view_realize;
1253         widget_class->unrealize = ev_view_unrealize;
1254         gtk_object_class->destroy = ev_view_destroy;
1255
1256         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1257         class->scroll_view = ev_view_scroll_view;
1258
1259         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
1260                                                                      G_OBJECT_CLASS_TYPE (object_class),
1261                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1262                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1263                                                                      NULL, NULL,
1264                                                                      ev_marshal_VOID__OBJECT_OBJECT,
1265                                                                      G_TYPE_NONE, 2,
1266                                                                      GTK_TYPE_ADJUSTMENT,
1267                                                                      GTK_TYPE_ADJUSTMENT);
1268
1269         g_signal_new ("scroll_view",
1270                       G_TYPE_FROM_CLASS (object_class),
1271                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1272                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
1273                       NULL, NULL,
1274                       ev_marshal_VOID__ENUM_BOOLEAN,
1275                       G_TYPE_NONE, 2,
1276                       GTK_TYPE_SCROLL_TYPE,
1277                       G_TYPE_BOOLEAN);
1278
1279         g_object_class_install_property (object_class,
1280                                          PROP_STATUS,
1281                                          g_param_spec_string ("status",
1282                                                               "Status Message",
1283                                                               "The status message",
1284                                                               NULL,
1285                                                               G_PARAM_READABLE));
1286
1287         g_object_class_install_property (object_class,
1288                                          PROP_FIND_STATUS,
1289                                          g_param_spec_string ("find-status",
1290                                                               "Find Status Message",
1291                                                               "The find status message",
1292                                                               NULL,
1293                                                               G_PARAM_READABLE));
1294
1295         binding_set = gtk_binding_set_by_class (class);
1296
1297         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1298         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1299         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1300         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1301
1302         add_scroll_binding_keypad (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
1303         add_scroll_binding_keypad (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
1304
1305         add_scroll_binding_shifted (binding_set, GDK_space, EV_SCROLL_PAGE_FORWARD, EV_SCROLL_PAGE_BACKWARD, FALSE);
1306         add_scroll_binding_shifted (binding_set, GDK_BackSpace, EV_SCROLL_PAGE_BACKWARD, EV_SCROLL_PAGE_FORWARD, FALSE);
1307 }
1308
1309 void
1310 ev_view_set_spacing (EvView     *view,
1311                      int         spacing)
1312 {
1313         g_return_if_fail (EV_IS_VIEW (view));
1314
1315         view->spacing = spacing;
1316
1317         if (view->document) {
1318                 gtk_widget_queue_resize (GTK_WIDGET (view));
1319         }
1320 }
1321
1322 static void
1323 ev_view_init (EvView *view)
1324 {
1325         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1326
1327         view->spacing = 0;
1328         view->scale = 1.0;
1329         view->current_page = 0;
1330         view->pressed_button = -1;
1331         view->cursor = EV_VIEW_CURSOR_NORMAL;
1332         view->show_border = TRUE;
1333 }
1334
1335 static void
1336 update_find_status_message (EvView *view)
1337 {
1338         char *message;
1339
1340 //      ev_document_doc_mutex_lock ();
1341         if (view->current_page == view->find_page) {
1342                 int results;
1343
1344 //              ev_document_doc_mutex_lock ();
1345                 results = ev_document_find_get_n_results
1346                                 (EV_DOCUMENT_FIND (view->document),
1347                                  view->current_page);
1348 //              ev_document_doc_mutex_unlock ();
1349                 /* TRANS: Sometimes this could be better translated as
1350                    "%d hit(s) on this page".  Therefore this string
1351                    contains plural cases. */
1352                 message = g_strdup_printf (ngettext ("%d found on this page",
1353                                                      "%d found on this page",
1354                                                      results),
1355                                            results);
1356         } else {
1357                 double percent;
1358
1359                 ev_document_doc_mutex_lock ();
1360                 percent = ev_document_find_get_progress
1361                                 (EV_DOCUMENT_FIND (view->document));
1362                 ev_document_doc_mutex_unlock ();
1363                 if (percent >= (1.0 - 1e-10)) {
1364                         message = g_strdup (_("Not found"));
1365                 } else {
1366                         message = g_strdup_printf (_("%3d%% remaining to search"),
1367                                                    (int) ((1.0 - percent) * 100));
1368                 }
1369
1370         }
1371 //      ev_document_doc_mutex_unlock ();
1372
1373         ev_view_set_find_status (view, message);
1374 //      g_free (message);
1375 }
1376
1377 #define MARGIN 5
1378
1379 static void
1380 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
1381 {
1382         GtkWidget *widget = GTK_WIDGET (view);
1383         GtkAdjustment *adjustment;
1384         int value;
1385
1386         adjustment = view->vadjustment;
1387
1388         if (rect->y < adjustment->value) {
1389                 value = MAX (adjustment->lower, rect->y - MARGIN);
1390                 gtk_adjustment_set_value (view->vadjustment, value);
1391         } else if (rect->y + rect->height >
1392                    adjustment->value + widget->allocation.height) {
1393                 value = MIN (adjustment->upper, rect->y + rect->height -
1394                              widget->allocation.height + MARGIN);
1395                 gtk_adjustment_set_value (view->vadjustment, value);
1396         }
1397
1398         adjustment = view->hadjustment;
1399
1400         if (rect->x < adjustment->value) {
1401                 value = MAX (adjustment->lower, rect->x - MARGIN);
1402                 gtk_adjustment_set_value (view->hadjustment, value);
1403         } else if (rect->x + rect->height >
1404                    adjustment->value + widget->allocation.width) {
1405                 value = MIN (adjustment->upper, rect->x + rect->width -
1406                              widget->allocation.width + MARGIN);
1407                 gtk_adjustment_set_value (view->hadjustment, value);
1408         }
1409 }
1410
1411 static void
1412 jump_to_find_result (EvView *view)
1413 {
1414         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1415         EvRectangle rect;
1416         GdkRectangle view_rect;
1417         int n_results;
1418
1419         ev_document_doc_mutex_lock ();
1420         n_results = ev_document_find_get_n_results (find, view->current_page);
1421         ev_document_doc_mutex_unlock ();
1422
1423         if (n_results > view->find_result) {
1424                 ev_document_doc_mutex_lock ();
1425                 ev_document_find_get_result
1426                         (find, view->current_page, view->find_result, &rect);
1427                 ev_document_doc_mutex_unlock ();
1428
1429                 doc_rect_to_view_rect (view, &rect, &view_rect);
1430                 ensure_rectangle_is_visible (view, &view_rect);
1431         }
1432 }
1433
1434 static void
1435 jump_to_find_page (EvView *view)
1436 {
1437         int n_pages, i;
1438
1439         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1440
1441         for (i = 0; i < n_pages; i++) {
1442                 int has_results;
1443                 int page;
1444
1445                 page = i + view->find_page;
1446                 if (page >= n_pages) {
1447                         page = page - n_pages;
1448                 }
1449
1450                 //              ev_document_doc_mutex_lock ();
1451                 has_results = ev_document_find_page_has_results
1452                                 (EV_DOCUMENT_FIND (view->document), page);
1453                 if (has_results == -1) {
1454                         view->find_page = page;
1455                         break;
1456                 } else if (has_results == 1) {
1457                         ev_page_cache_set_current_page (view->page_cache, page);
1458                         jump_to_find_result (view);
1459                         break;
1460                 }
1461         }
1462 }
1463
1464 static void
1465 find_changed_cb (EvDocument *document, int page, EvView *view)
1466 {
1467         jump_to_find_page (view);
1468         jump_to_find_result (view);
1469         update_find_status_message (view);
1470
1471         if (view->current_page == page)
1472                 gtk_widget_queue_draw (GTK_WIDGET (view));
1473 }
1474 /*** Public API ***/
1475
1476 GtkWidget*
1477 ev_view_new (void)
1478 {
1479         return g_object_new (EV_TYPE_VIEW, NULL);
1480 }
1481
1482 static void
1483 job_finished_cb (EvPixbufCache *pixbuf_cache,
1484                  EvView        *view)
1485 {
1486         gtk_widget_queue_draw (GTK_WIDGET (view));
1487 }
1488
1489
1490 static void
1491 page_changed_cb (EvPageCache *page_cache,
1492                  int          new_page,
1493                  EvView      *view)
1494 {
1495         int old_page = view->current_page;
1496         int old_width, old_height;
1497         int new_width, new_height;
1498
1499         if (old_page == new_page)
1500                 return;
1501
1502         ev_page_cache_get_size (page_cache,
1503                                 old_page,
1504                                 view->scale,
1505                                 &old_width, &old_height);
1506
1507         view->current_page = new_page;
1508         view->has_selection = FALSE;
1509
1510         compute_zoom_factor (view);
1511
1512         ev_page_cache_get_size (page_cache,
1513                                 new_page,
1514                                 view->scale,
1515                                 &new_width, &new_height);
1516
1517         compute_border (view, new_width, new_height, &(view->border));
1518
1519         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
1520                                         view->current_page,
1521                                         view->current_page,
1522                                         view->scale);
1523
1524         if (new_width != old_width || new_height != old_height)
1525                 gtk_widget_queue_resize (GTK_WIDGET (view));
1526         else
1527                 gtk_widget_queue_draw (GTK_WIDGET (view));
1528
1529         gtk_adjustment_set_value (view->vadjustment,
1530                                   view->vadjustment->lower);
1531
1532         if (EV_IS_DOCUMENT_FIND (view->document)) {
1533                 view->find_page = new_page;
1534                 view->find_result = 0;
1535                 update_find_status_message (view);
1536         }
1537 }
1538
1539 void
1540 ev_view_set_document (EvView     *view,
1541                       EvDocument *document)
1542 {
1543         g_return_if_fail (EV_IS_VIEW (view));
1544
1545         if (document != view->document) {
1546                 if (view->document) {
1547                         g_signal_handlers_disconnect_by_func (view->document,
1548                                                               find_changed_cb,
1549                                                               view);
1550                         g_object_unref (view->document);
1551                         view->page_cache = NULL;
1552
1553                 }
1554
1555                 view->document = document;
1556                 view->find_page = 0;
1557                 view->find_result = 0;
1558
1559                 if (view->document) {
1560                         g_object_ref (view->document);
1561                         if (EV_IS_DOCUMENT_FIND (view->document)) {
1562                                 g_signal_connect (view->document,
1563                                                   "find_changed",
1564                                                   G_CALLBACK (find_changed_cb),
1565                                                   view);
1566                         }
1567                         view->page_cache = ev_document_get_page_cache (view->document);
1568                         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
1569                         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
1570                         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
1571                 }
1572
1573                 gtk_widget_queue_resize (GTK_WIDGET (view));
1574         }
1575 }
1576
1577 static void
1578 ev_view_zoom (EvView   *view,
1579               double    factor,
1580               gboolean  relative)
1581 {
1582         double scale;
1583
1584         if (relative)
1585                 scale = view->scale * factor;
1586         else
1587                 scale = factor;
1588
1589         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1590
1591         view->scale = scale;
1592         view->width = view->height = -1;
1593         gtk_widget_queue_resize (GTK_WIDGET (view));
1594 }
1595
1596 gboolean
1597 ev_view_can_zoom_in (EvView *view)
1598 {
1599         if (view->width != -1 || view->height != -1) {
1600                 return TRUE;
1601         }
1602
1603         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
1604 }
1605
1606 gboolean
1607 ev_view_can_zoom_out (EvView *view)
1608 {
1609         if (view->width != -1 || view->height != -1) {
1610                 return TRUE;
1611         }
1612
1613         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
1614 }
1615
1616 void
1617 ev_view_zoom_in (EvView *view)
1618 {
1619         ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
1620 }
1621
1622 void
1623 ev_view_zoom_out (EvView *view)
1624 {
1625         ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
1626 }
1627
1628 void
1629 ev_view_zoom_normal (EvView *view)
1630 {
1631         ev_view_zoom (view, 1.0, FALSE);
1632 }
1633
1634 void
1635 ev_view_set_size (EvView     *view,
1636                   int         width,
1637                   int         height)
1638 {
1639         if (!view->document) {
1640                 return;
1641         }
1642
1643         if (width != view->width || height != view->height) {
1644                 view->width = width;
1645                 view->height = height;
1646                 gtk_widget_queue_resize (GTK_WIDGET (view));
1647         }
1648 }
1649
1650 const char *
1651 ev_view_get_status (EvView *view)
1652 {
1653         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1654
1655         return view->status;
1656 }
1657
1658 const char *
1659 ev_view_get_find_status (EvView *view)
1660 {
1661         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1662
1663         return view->find_status;
1664 }
1665
1666 gboolean
1667 ev_view_can_find_next (EvView *view)
1668 {
1669         int n_results = 0;
1670
1671         if (EV_IS_DOCUMENT_FIND (view->document)) {
1672                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1673
1674                 ev_document_doc_mutex_lock ();
1675                 n_results = ev_document_find_get_n_results (find, view->current_page);
1676                 ev_document_doc_mutex_unlock ();
1677         }
1678
1679         return n_results > 0;
1680 }
1681
1682 void
1683 ev_view_find_next (EvView *view)
1684 {
1685         EvPageCache *page_cache;
1686         int n_results, n_pages;
1687         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1688
1689         page_cache = ev_document_get_page_cache (view->document);
1690         ev_document_doc_mutex_lock ();
1691         n_results = ev_document_find_get_n_results (find, view->current_page);
1692         ev_document_doc_mutex_unlock ();
1693
1694         n_pages = ev_page_cache_get_n_pages (page_cache);
1695
1696         view->find_result++;
1697
1698         if (view->find_result >= n_results) {
1699                 view->find_result = 0;
1700                 view->find_page++;
1701
1702                 if (view->find_page >= n_pages) {
1703                         view->find_page = 0;
1704                 }
1705
1706                 jump_to_find_page (view);
1707         } else {
1708                 jump_to_find_result (view);
1709                 gtk_widget_queue_draw (GTK_WIDGET (view));
1710         }
1711 }
1712
1713 void
1714 ev_view_find_previous (EvView *view)
1715 {
1716         int n_results, n_pages;
1717         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
1718         EvPageCache *page_cache;
1719
1720         page_cache = ev_document_get_page_cache (view->document);
1721
1722         ev_document_doc_mutex_lock ();
1723         n_results = ev_document_find_get_n_results (find, view->current_page);
1724         ev_document_doc_mutex_unlock ();
1725
1726         n_pages = ev_page_cache_get_n_pages (page_cache);
1727
1728         view->find_result--;
1729
1730         if (view->find_result < 0) {
1731                 view->find_result = 0;
1732                 view->find_page--;
1733
1734                 if (view->find_page < 0) {
1735                         view->find_page = n_pages - 1;
1736                 }
1737
1738                 jump_to_find_page (view);
1739         } else {
1740                 jump_to_find_result (view);
1741                 gtk_widget_queue_draw (GTK_WIDGET (view));
1742         }
1743 }
1744 void
1745 ev_view_hide_cursor (EvView *view)
1746 {
1747        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
1748 }
1749
1750 void
1751 ev_view_show_cursor (EvView *view)
1752 {
1753        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1754 }