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-selection.h"
  33 #include "ev-document-find.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-debug.h"
  36 #include "ev-job-queue.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39
  40 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  41 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  42 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  43
  44 enum {
  45         PROP_0,
  46         PROP_STATUS,
  47         PROP_FIND_STATUS,
  48         PROP_CONTINUOUS,
  49         PROP_DUAL_PAGE,
  50         PROP_FULLSCREEN,
  51         PROP_PRESENTATION,
  52         PROP_SIZING_MODE,
  53         PROP_ZOOM,
  54 };
  55
  56 enum {
  57         SIGNAL_BINDING_ACTIVATED,
  58         SIGNAL_ZOOM_INVALID,
  59         N_SIGNALS,
  60 };
  61
  62 enum {
  63         TARGET_STRING,
  64         TARGET_TEXT,
  65         TARGET_COMPOUND_TEXT,
  66         TARGET_UTF8_STRING,
  67         TARGET_TEXT_BUFFER_CONTENTS
  68 };
  69
  70 static const GtkTargetEntry targets[] = {
  71         { "STRING", 0, TARGET_STRING },
  72         { "TEXT",   0, TARGET_TEXT },
  73         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  74         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  75 };
  76
  77 static guint signals[N_SIGNALS];
  78
  79 typedef enum {
  80         EV_VIEW_CURSOR_NORMAL,
  81         EV_VIEW_CURSOR_IBEAM,
  82         EV_VIEW_CURSOR_LINK,
  83         EV_VIEW_CURSOR_WAIT,
  84         EV_VIEW_CURSOR_HIDDEN,
  85         EV_VIEW_CURSOR_DRAG
  86 } EvViewCursor;
  87
  88 #define ZOOM_IN_FACTOR  1.2
  89 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  90
  91 #define MIN_SCALE 0.05409
  92 #define MAX_SCALE 4.0
  93
  94 /* Information for middle clicking and moving around the doc */
  95 typedef struct {
  96         gboolean in_drag;
  97         GdkPoint start;
  98         gdouble hadj;
  99         gdouble vadj;
 100 } DragInfo;
 101
 102 /* Information for handling selection */
 103 typedef struct {
 104         gboolean in_selection;
 105         GdkPoint start;
 106         GList *selections;
 107 } SelectionInfo;
 108
 109 typedef enum {
 110         SCROLL_TO_KEEP_POSITION,
 111         SCROLL_TO_CURRENT_PAGE,
 112         SCROLL_TO_CENTER
 113 } PendingScroll;
 114
 115 struct _EvView {
 116         GtkWidget parent_instance;
 117
 118         EvDocument *document;
 119
 120         char *status;
 121         char *find_status;
 122
 123         gint scroll_x;
 124         gint scroll_y;
 125
 126         /* Information for middle clicking and dragging around. */
 127         DragInfo drag_info;
 128
 129         /* Selection */
 130         EvViewSelectionMode selection_mode;
 131         SelectionInfo selection_info;
 132
 133         gboolean pressed_button;
 134         EvViewCursor cursor;
 135
 136         GtkAdjustment *hadjustment;
 137         GtkAdjustment *vadjustment;
 138
 139         EvPageCache *page_cache;
 140         EvPixbufCache *pixbuf_cache;
 141
 142         gint start_page;
 143         gint end_page;
 144         gint current_page;
 145
 146         EvJobRender *current_job;
 147
 148         int find_page;
 149         int find_result;
 150         int spacing;
 151
 152         double scale;
 153
 154         gboolean continuous;
 155         gboolean dual_page;
 156         gboolean fullscreen;
 157         gboolean presentation;
 158         EvSizingMode sizing_mode;
 159
 160         PendingScroll pending_scroll;
 161         gboolean pending_resize;
 162 };
 163
 164 struct _EvViewClass {
 165         GtkWidgetClass parent_class;
 166
 167         void    (*set_scroll_adjustments) (EvView         *view,
 168                                            GtkAdjustment  *hadjustment,
 169                                            GtkAdjustment  *vadjustment);
 170         void    (*binding_activated)      (EvView         *view,
 171                                            GtkScrollType   scroll,
 172                                            gboolean        horizontal);
 173         void    (*zoom_invalid)           (EvView         *view);
 174 };
 175
 176 /*** Scrolling ***/
 177 static void       scroll_to_current_page                     (EvView *view,
 178                                                               GtkOrientation orientation);
 179 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 180                                                               GtkAdjustment      *hadjustment,
 181                                                               GtkAdjustment      *vadjustment);
 182 static void       view_update_range_and_current_page         (EvView             *view);
 183 static void       set_scroll_adjustment                      (EvView             *view,
 184                                                               GtkOrientation      orientation,
 185                                                               GtkAdjustment      *adjustment);
 186 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 187                                                               GtkAdjustment      *hadjustment,
 188                                                               GtkAdjustment      *vadjustment);
 189 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 190                                                               guint               keyval,
 191                                                               GtkScrollType       scroll,
 192                                                               gboolean            horizontal);
 193 static void       ev_view_binding_activated                  (EvView             *view,
 194                                                               GtkScrollType       scroll,
 195                                                               gboolean            horizontal);
 196 static void       ensure_rectangle_is_visible                (EvView             *view,
 197                                                               GdkRectangle       *rect);
 198
 199 /*** Geometry computations ***/
 200 static void       compute_border                             (EvView             *view,
 201                                                               int                 width,
 202                                                               int                 height,
 203                                                               GtkBorder          *border);
 204 static void       get_page_y_offset                          (EvView *view,
 205                                                               int page,
 206                                                               double zoom,
 207                                                               int *y_offset);
 208 static gboolean   get_page_extents                           (EvView             *view,
 209                                                               gint                page,
 210                                                               GdkRectangle       *page_area,
 211                                                               GtkBorder          *border);
 212 static void       view_rect_to_doc_rect                      (EvView             *view,
 213                                                               GdkRectangle       *view_rect,
 214                                                               GdkRectangle       *page_area,
 215                                                               EvRectangle        *doc_rect);
 216 static void       doc_rect_to_view_rect                      (EvView             *view,
 217                                                               int                 page,
 218                                                               EvRectangle        *doc_rect,
 219                                                               GdkRectangle       *view_rect);
 220 static void       find_page_at_location                      (EvView             *view,
 221                                                               gdouble             x,
 222                                                               gdouble             y,
 223                                                               gint               *page,
 224                                                               gint               *x_offset,
 225                                                               gint               *y_offset);
 226
 227 /*** Hyperrefs ***/
 228 static EvLink*    get_link_at_location                       (EvView             *view,
 229                                                               gdouble             x,
 230                                                               gdouble             y);
 231 static void       go_to_link                                 (EvView             *view,
 232                                                               EvLink             *link);
 233 static char*      status_message_from_link                   (EvView             *view,
 234                                                               EvLink             *link);
 235
 236 /*** GtkWidget implementation ***/
 237 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 238                                                               GtkRequisition     *requisition);
 239 static void       ev_view_size_request_continuous            (EvView             *view,
 240                                                               GtkRequisition     *requisition);
 241 static void       ev_view_size_request_dual_page             (EvView             *view,
 242                                                               GtkRequisition     *requisition);
 243 static void       ev_view_size_request_single_page           (EvView             *view,
 244                                                               GtkRequisition     *requisition);
 245 static void       ev_view_size_request                       (GtkWidget          *widget,
 246                                                               GtkRequisition     *requisition);
 247 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 248                                                               GtkAllocation      *allocation);
 249 static void       ev_view_realize                            (GtkWidget          *widget);
 250 static void       ev_view_unrealize                          (GtkWidget          *widget);
 251 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 252                                                               GdkEventScroll     *event);
 253 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 254                                                               GdkEventExpose     *event);
 255 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 256                                                               GdkEventButton     *event);
 257 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 258                                                               GdkEventMotion     *event);
 259 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 260                                                               GdkEventButton     *event);
 261 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 262                                                               GdkEventCrossing   *event);
 263
 264 /*** Drawing ***/
 265 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 266 static void       draw_rubberband                            (GtkWidget          *widget,
 267                                                               GdkWindow          *window,
 268                                                               const GdkRectangle *rect,
 269                                                               guchar              alpha);
 270 static void       highlight_find_results                     (EvView             *view,
 271                                                               int                 page);
 272 static void       draw_one_page                              (EvView             *view,
 273                                                               gint                page,
 274                                                               GdkRectangle       *page_area,
 275                                                               GtkBorder          *border,
 276                                                               GdkRectangle       *expose_area);
 277
 278 /*** Callbacks ***/
 279 static void       find_changed_cb                            (EvDocument         *document,
 280                                                               int                 page,
 281                                                               EvView             *view);
 282 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 283                                                               EvView             *view);
 284 static void       page_changed_cb                            (EvPageCache        *page_cache,
 285                                                               int                 new_page,
 286                                                               EvView             *view);
 287 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 288                                                               EvView             *view);
 289
 290 /*** GObject ***/
 291 static void       ev_view_finalize                           (GObject            *object);
 292 static void       ev_view_destroy                            (GtkObject          *object);
 293 static void       ev_view_set_property                       (GObject            *object,
 294                                                               guint               prop_id,
 295                                                               const GValue       *value,
 296                                                               GParamSpec         *pspec);
 297 static void       ev_view_get_property                       (GObject            *object,
 298                                                               guint               prop_id,
 299                                                               GValue             *value,
 300                                                               GParamSpec         *pspec);
 301 static void       ev_view_class_init                         (EvViewClass        *class);
 302 static void       ev_view_init                               (EvView             *view);
 303
 304 /*** Zoom and sizing ***/
 305 static double   zoom_for_size_fit_width                      (int doc_width,
 306                                                               int doc_height,
 307                                                               int target_width,
 308                                                               int target_height,
 309                                                               int vsb_width);
 310 static double   zoom_for_size_best_fit                       (int doc_width,
 311                                                               int doc_height,
 312                                                               int target_width,
 313                                                               int target_height,
 314                                                               int vsb_width,
 315                                                               int hsb_width);
 316 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 317                                                               int     width,
 318                                                               int     height);
 319 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 320                                                                 int     width,
 321                                                                 int     height,
 322                                                                 int     vsb_width,
 323                                                                 int     hsb_height);
 324 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 325                                                                 int     width,
 326                                                                 int     height,
 327                                                                 int     vsb_width,
 328                                                                 int     hsb_height);
 329 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 330                                                                 int     width,
 331                                                                 int     height,
 332                                                                 int     vsb_width,
 333                                                                 int     hsb_height);
 334 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 335                                                                 int     width,
 336                                                                 int     height,
 337                                                                 int     vsb_width,
 338                                                                 int     hsb_height);
 339 /*** Cursors ***/
 340 static GdkCursor* ev_view_create_invisible_cursor            (void);
 341 static void       ev_view_set_cursor                         (EvView             *view,
 342                                                               EvViewCursor        new_cursor);
 343
 344 /*** Status messages ***/
 345 static void       ev_view_set_status                         (EvView             *view,
 346                                                               const char         *message);
 347 static void       update_find_status_message                 (EvView             *view);
 348 static void       ev_view_set_find_status                    (EvView             *view,
 349                                                               const char         *message);
 350 /*** Find ***/
 351 static void       jump_to_find_result                        (EvView             *view);
 352 static void       jump_to_find_page                          (EvView             *view);
 353
 354 /*** Selection ***/
 355 static void       compute_selections                         (EvView             *view,
 356                                                               GdkPoint           *start,
 357                                                               GdkPoint           *stop);
 358 static void       clear_selection                            (EvView             *view);
 359 static char*      get_selected_text                          (EvView             *ev_view);
 360 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 361                                                               GtkSelectionData   *selection_data,
 362                                                               guint               info,
 363                                                               gpointer            data);
 364 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 365                                                               gpointer            data);
 366 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 367
 368
 369 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 370
 371 static void
 372 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 373 {
 374         GdkRectangle page_area;
 375         GtkBorder border;
 376
 377         if (view->document == NULL) {
 378                 return;
 379         }
 380
 381         get_page_extents (view, view->current_page, &page_area, &border);
 382
 383         if (orientation == GTK_ORIENTATION_VERTICAL) {
 384                 if (view->continuous) {
 385                         gtk_adjustment_clamp_page (view->vadjustment,
 386                                                    page_area.y - view->spacing,
 387                                                    page_area.y + view->vadjustment->page_size);
 388                 } else {
 389                         gtk_adjustment_set_value (view->vadjustment,
 390                                                   view->vadjustment->lower);
 391                 }
 392         } else {
 393                 if (view->dual_page) {
 394                         gtk_adjustment_clamp_page (view->hadjustment,
 395                                                    page_area.x,
 396                                                    page_area.x + view->hadjustment->page_size);
 397                 } else {
 398                         gtk_adjustment_set_value (view->hadjustment,
 399                                                   CLAMP (view->hadjustment->value,
 400                                                   view->hadjustment->lower,
 401                                                   view->hadjustment->upper -
 402                                                   view->hadjustment->page_size));
 403                 }
 404         }
 405 }
 406
 407 static void
 408 view_set_adjustment_values (EvView         *view,
 409                             GtkOrientation  orientation)
 410 {
 411         GtkWidget *widget = GTK_WIDGET (view);
 412         GtkAdjustment *adjustment;
 413         int requisition;
 414         int allocation;
 415
 416         double factor;
 417         gint new_value;
 418
 419         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 420                 requisition = widget->requisition.width;
 421                 allocation = widget->allocation.width;
 422                 adjustment = view->hadjustment;
 423         } else {
 424                 requisition = widget->requisition.height;
 425                 allocation = widget->allocation.height;
 426                 adjustment = view->vadjustment;
 427         }
 428
 429         if (!adjustment)
 430                 return;
 431
 432         factor = 1.0;
 433         switch (view->pending_scroll) {
 434                 case SCROLL_TO_KEEP_POSITION:
 435                         factor = (adjustment->value) / adjustment->upper;
 436                         break;
 437                 case SCROLL_TO_CURRENT_PAGE:
 438                         break;
 439                 case SCROLL_TO_CENTER:
 440                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 441                         break;
 442         }
 443
 444         adjustment->page_size = allocation;
 445         adjustment->step_increment = allocation * 0.1;
 446         adjustment->page_increment = allocation * 0.9;
 447         adjustment->lower = 0;
 448         adjustment->upper = MAX (allocation, requisition);
 449
 450         /*
 451          * We add 0.5 to the values before to average out our rounding errors.
 452          */
 453         switch (view->pending_scroll) {
 454                 case SCROLL_TO_KEEP_POSITION:
 455                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 456                         gtk_adjustment_set_value (adjustment, (int)new_value);
 457                         break;
 458                 case SCROLL_TO_CURRENT_PAGE:
 459                         scroll_to_current_page (view, orientation);
 460                         break;
 461                 case SCROLL_TO_CENTER:
 462                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 463                                            0, adjustment->upper - adjustment->page_size);
 464                         gtk_adjustment_set_value (adjustment, (int)new_value);
 465                         break;
 466         }
 467
 468         gtk_adjustment_changed (adjustment);
 469 }
 470
 471 static void
 472 view_update_range_and_current_page (EvView *view)
 473 {
 474         /* Presentation trumps all other modes */
 475         if (view->presentation) {
 476                 view->start_page = view->current_page;
 477                 view->end_page = view->current_page;
 478         } else if (view->continuous) {
 479                 GdkRectangle current_area, unused, page_area;
 480                 GtkBorder border;
 481                 gint current_page;
 482                 gboolean found = FALSE;
 483                 int i;
 484
 485                 if (!(view->vadjustment && view->hadjustment))
 486                         return;
 487
 488                 current_area.x = view->hadjustment->value;
 489                 current_area.width = view->hadjustment->upper;
 490                 current_area.y = view->vadjustment->value;
 491                 current_area.height = view->vadjustment->page_size;
 492
 493                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 494
 495                         get_page_extents (view, i, &page_area, &border);
 496
 497                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 498                                 if (! found) {
 499                                         view->start_page = i;
 500                                         found = TRUE;
 501
 502                                 }
 503                                 view->end_page = i;
 504                         } else if (found) {
 505                                 break;
 506                         }
 507                 }
 508
 509                 current_page = ev_page_cache_get_current_page (view->page_cache);
 510
 511                 if (current_page < view->start_page || current_page > view->end_page) {
 512                         view->current_page = view->start_page;
 513                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 514                 }
 515         } else {
 516                 if (view->dual_page) {
 517                         if (view->current_page % 2 == 0) {
 518                                 view->start_page = view->current_page;
 519                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 520                                         view->end_page = view->start_page + 1;
 521                         } else {
 522                                 view->start_page = view->current_page - 1;
 523                                 view->end_page = view->current_page;
 524                         }
 525                 } else {
 526                         view->start_page = view->current_page;
 527                         view->end_page = view->current_page;
 528                 }
 529         }
 530
 531         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 532                                         view->start_page,
 533                                         view->end_page,
 534                                         view->scale,
 535                                         view->selection_info.selections);
 536 }
 537
 538 static void
 539 set_scroll_adjustment (EvView *view,
 540                        GtkOrientation  orientation,
 541                        GtkAdjustment  *adjustment)
 542 {
 543         GtkAdjustment **to_set;
 544
 545         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 546                 to_set = &view->hadjustment;
 547         else
 548                 to_set = &view->vadjustment;
 549
 550         if (*to_set != adjustment) {
 551                 if (*to_set) {
 552                         g_signal_handlers_disconnect_by_func (*to_set,
 553                                                               (gpointer) on_adjustment_value_changed,
 554                                                               view);
 555                         g_object_unref (*to_set);
 556                 }
 557
 558                 *to_set = adjustment;
 559                 view_set_adjustment_values (view, orientation);
 560
 561                 if (*to_set) {
 562                         g_object_ref (*to_set);
 563                         g_signal_connect (*to_set, "value_changed",
 564                                           G_CALLBACK (on_adjustment_value_changed), view);
 565                 }
 566         }
 567 }
 568
 569 static void
 570 ev_view_set_scroll_adjustments (EvView *view,
 571                                 GtkAdjustment  *hadjustment,
 572                                 GtkAdjustment  *vadjustment)
 573 {
 574         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 575         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 576
 577         on_adjustment_value_changed (NULL, view);
 578 }
 579
 580 static void
 581 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 582                            guint           keyval,
 583                            GtkScrollType   scroll,
 584                            gboolean        horizontal)
 585 {
 586   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 587
 588   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 589                                 "binding_activated", 2,
 590                                 GTK_TYPE_SCROLL_TYPE, scroll,
 591                                 G_TYPE_BOOLEAN, horizontal);
 592   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 593                                 "binding_activated", 2,
 594                                 GTK_TYPE_SCROLL_TYPE, scroll,
 595                                 G_TYPE_BOOLEAN, horizontal);
 596 }
 597
 598 void
 599 ev_view_scroll (EvView        *view,
 600                 EvScrollType   scroll)
 601 {
 602         GtkAdjustment *adjustment;
 603         double value, increment;
 604         gboolean first_page = FALSE;
 605         gboolean last_page = FALSE;
 606
 607         /* Assign values for increment and vertical adjustment */
 608         adjustment = view->vadjustment;
 609         increment = adjustment->page_size * 0.75;
 610         value = adjustment->value;
 611
 612         /* Assign boolean for first and last page */
 613         if (view->current_page == 0)
 614                 first_page = TRUE;
 615         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 616                 last_page = TRUE;
 617
 618         switch (scroll) {
 619                 case EV_SCROLL_PAGE_BACKWARD:
 620                         /* Do not jump backwards if at the first page */
 621                         if (value == (adjustment->lower) && first_page) {
 622                                 /* Do nothing */
 623                                 /* At the top of a page, assign the upper bound limit of previous page */
 624                         } else if (value == (adjustment->lower)) {
 625                                 value = adjustment->upper - adjustment->page_size;
 626                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 627                                 /* Jump to the top */
 628                         } else {
 629                                 value = MAX (value - increment, adjustment->lower);
 630                         }
 631                         break;
 632                 case EV_SCROLL_PAGE_FORWARD:
 633                         /* Do not jump forward if at the last page */
 634                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 635                                 /* Do nothing */
 636                         /* At the bottom of a page, assign the lower bound limit of next page */
 637                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 638                                 value = 0;
 639                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 640                         /* Jump to the bottom */
 641                         } else {
 642                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 643                         }
 644                         break;
 645                 default:
 646                         break;
 647         }
 648
 649         gtk_adjustment_set_value (adjustment, value);
 650 }
 651
 652 static void
 653 ev_view_binding_activated (EvView *view,
 654                            GtkScrollType scroll,
 655                            gboolean horizontal)
 656 {
 657         GtkAdjustment *adjustment;
 658         double value;
 659
 660         if (view->presentation) {
 661                 switch (scroll) {
 662                         case GTK_SCROLL_STEP_BACKWARD:
 663                                 ev_page_cache_prev_page (view->page_cache);
 664                                 break;
 665                         case GTK_SCROLL_STEP_FORWARD:
 666                                 ev_page_cache_next_page (view->page_cache);
 667                                 break;
 668                         default:
 669                                 break;
 670                 }
 671                 return;
 672         }
 673
 674         if (horizontal) {
 675                 adjustment = view->hadjustment;
 676         } else {
 677                 adjustment = view->vadjustment;
 678         }
 679
 680         value = adjustment->value;
 681
 682         switch (scroll) {
 683                 case GTK_SCROLL_STEP_BACKWARD:
 684                         value -= adjustment->step_increment;
 685                         break;
 686                 case GTK_SCROLL_STEP_FORWARD:
 687                         value += adjustment->step_increment;
 688                         break;
 689                 default:
 690                         break;
 691         }
 692
 693         value = CLAMP (value, adjustment->lower,
 694                        adjustment->upper - adjustment->page_size);
 695
 696         gtk_adjustment_set_value (adjustment, value);
 697 }
 698
 699 #define MARGIN 5
 700
 701 static void
 702 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 703 {
 704         GtkWidget *widget = GTK_WIDGET (view);
 705         GtkAdjustment *adjustment;
 706         int value;
 707
 708         adjustment = view->vadjustment;
 709
 710         if (rect->y < adjustment->value) {
 711                 value = MAX (adjustment->lower, rect->y - MARGIN);
 712                 gtk_adjustment_set_value (view->vadjustment, value);
 713         } else if (rect->y + rect->height >
 714                    adjustment->value + widget->allocation.height) {
 715                 value = MIN (adjustment->upper, rect->y + rect->height -
 716                              widget->allocation.height + MARGIN);
 717                 gtk_adjustment_set_value (view->vadjustment, value);
 718         }
 719
 720         adjustment = view->hadjustment;
 721
 722         if (rect->x < adjustment->value) {
 723                 value = MAX (adjustment->lower, rect->x - MARGIN);
 724                 gtk_adjustment_set_value (view->hadjustment, value);
 725         } else if (rect->x + rect->height >
 726                    adjustment->value + widget->allocation.width) {
 727                 value = MIN (adjustment->upper, rect->x + rect->width -
 728                              widget->allocation.width + MARGIN);
 729                 gtk_adjustment_set_value (view->hadjustment, value);
 730         }
 731 }
 732
 733 /*** Geometry computations ***/
 734
 735 static void
 736 compute_border (EvView *view, int width, int height, GtkBorder *border)
 737 {
 738         if (view->presentation) {
 739                 border->left = 0;
 740                 border->right = 0;
 741                 border->top = 0;
 742                 border->bottom = 0;
 743         } else {
 744                 ev_document_misc_get_page_border_size (width, height, border);
 745         }
 746 }
 747
 748 static void       get_page_y_offset                          (EvView *view,
 749                                                               int page,
 750                                                               double zoom,
 751                                                               int *y_offset)
 752 {
 753         int max_width, offset;
 754         GtkBorder border;
 755
 756         g_return_if_fail (y_offset != NULL);
 757
 758         ev_page_cache_get_max_width (view->page_cache, zoom, &max_width);
 759
 760         compute_border (view, max_width, max_width, &border);
 761
 762         if (view->dual_page) {
 763                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, NULL, &offset);
 764                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 765         } else {
 766                 ev_page_cache_get_height_to_page (view->page_cache, page, zoom, &offset, NULL);
 767                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 768         }
 769
 770         *y_offset = offset;
 771         return;
 772 }
 773
 774 static gboolean
 775 get_page_extents (EvView       *view,
 776                   gint          page,
 777                   GdkRectangle *page_area,
 778                   GtkBorder    *border)
 779 {
 780         GtkWidget *widget;
 781         int width, height;
 782
 783         widget = GTK_WIDGET (view);
 784
 785         /* Get the size of the page */
 786         ev_page_cache_get_size (view->page_cache, page,
 787                                 view->scale,
 788                                 &width, &height);
 789         compute_border (view, width, height, border);
 790         page_area->width = width + border->left + border->right;
 791         page_area->height = height + border->top + border->bottom;
 792
 793         if (view->presentation) {
 794                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 795                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 796         } else if (view->continuous) {
 797                 gint max_width;
 798                 gint x, y;
 799
 800                 ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
 801                 max_width = max_width + border->left + border->right;
 802                 /* Get the location of the bounding box */
 803                 if (view->dual_page) {
 804                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 805                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 806                         if (page % 2 == 0)
 807                                 x = x + (max_width - width - border->left - border->right);
 808                 } else {
 809                         x = view->spacing;
 810                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 811                 }
 812
 813                 get_page_y_offset (view, page, view->scale, &y);
 814
 815                 page_area->x = x;
 816                 page_area->y = y;
 817         } else {
 818                 gint x, y;
 819                 if (view->dual_page) {
 820                         gint width_2, height_2;
 821                         gint max_width = width;
 822                         gint max_height = height;
 823                         GtkBorder overall_border;
 824                         gint other_page;
 825
 826                         other_page = page ^ 1;
 827
 828                         /* First, we get the bounding box of the two pages */
 829                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 830                                 ev_page_cache_get_size (view->page_cache,
 831                                                         other_page,
 832                                                         view->scale,
 833                                                         &width_2, &height_2);
 834                                 if (width_2 > width)
 835                                         max_width = width_2;
 836                                 if (height_2 > height)
 837                                         max_height = height_2;
 838                         }
 839                         compute_border (view, max_width, max_height, &overall_border);
 840
 841                         /* Find the offsets */
 842                         x = view->spacing;
 843                         y = view->spacing;
 844
 845                         /* Adjust for being the left or right page */
 846                         if (page % 2 == 0)
 847                                 x = x + max_width - width;
 848                         else
 849                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 850
 851                         y = y + (max_height - height)/2;
 852
 853                         /* Adjust for extra allocation */
 854                         x = x + MAX (0, widget->allocation.width -
 855                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 856                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 857                 } else {
 858                         x = view->spacing;
 859                         y = view->spacing;
 860
 861                         /* Adjust for extra allocation */
 862                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 863                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 864                 }
 865
 866                 page_area->x = x;
 867                 page_area->y = y;
 868         }
 869
 870         return TRUE;
 871 }
 872
 873 static void
 874 view_point_to_doc_point (EvView *view,
 875                          GdkPoint *view_point,
 876                          GdkRectangle *page_area,
 877                          double  *doc_point_x,
 878                          double  *doc_point_y)
 879 {
 880         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 881         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 882 }
 883
 884 static void
 885 view_rect_to_doc_rect (EvView *view,
 886                        GdkRectangle *view_rect,
 887                        GdkRectangle *page_area,
 888                        EvRectangle  *doc_rect)
 889 {
 890         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 891         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 892         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 893         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 894 }
 895
 896 static void
 897 doc_rect_to_view_rect (EvView       *view,
 898                        int           page,
 899                        EvRectangle  *doc_rect,
 900                        GdkRectangle *view_rect)
 901 {
 902         GdkRectangle page_area;
 903         GtkBorder border;
 904         int width, height;
 905
 906         get_page_extents (view, page, &page_area, &border);
 907
 908         width = doc_rect->x2 - doc_rect->x1;
 909         height = doc_rect->y2 - doc_rect->y1;
 910         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 911         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 912         view_rect->width = ceil (width * view->scale);
 913         view_rect->height = ceil (height * view->scale);
 914 }
 915
 916 static void
 917 find_page_at_location (EvView  *view,
 918                        gdouble  x,
 919                        gdouble  y,
 920                        gint    *page,
 921                        gint    *x_offset,
 922                        gint    *y_offset)
 923 {
 924         int i;
 925
 926         if (view->document == NULL)
 927                 return;
 928
 929         g_assert (page);
 930         g_assert (x_offset);
 931         g_assert (y_offset);
 932
 933         for (i = view->start_page; i <= view->end_page; i++) {
 934                 GdkRectangle page_area;
 935                 GtkBorder border;
 936
 937                 if (! get_page_extents (view, i, &page_area, &border))
 938                         continue;
 939
 940                 if ((x >= page_area.x + border.left) &&
 941                     (x < page_area.x + page_area.width - border.right) &&
 942                     (y >= page_area.y + border.top) &&
 943                     (y < page_area.y + page_area.height - border.bottom)) {
 944                         *page = i;
 945                         *x_offset = x - (page_area.x + border.left);
 946                         *y_offset = y - (page_area.y + border.top);
 947                         return;
 948                 }
 949         }
 950
 951         *page = -1;
 952 }
 953
 954 static gboolean
 955 location_in_text (EvView  *view,
 956                   gdouble  x,
 957                   gdouble  y)
 958 {
 959         GdkRegion *region;
 960         gint page = -1;
 961         gint x_offset = 0, y_offset = 0;
 962
 963         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 964
 965         if (page == -1)
 966                 return FALSE;
 967
 968         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 969
 970         if (region)
 971                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
 972         else
 973                 return FALSE;
 974 }
 975
 976 /*** Hyperref ***/
 977 static EvLink *
 978 get_link_at_location (EvView  *view,
 979                       gdouble  x,
 980                       gdouble  y)
 981 {
 982         gint page = -1;
 983         gint x_offset = 0, y_offset = 0;
 984         GList *link_mapping;
 985
 986         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 987
 988         if (page == -1)
 989                 return NULL;
 990
 991         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 992
 993         if (link_mapping)
 994                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
 995         else
 996                 return NULL;
 997 }
 998
 999 /* FIXME: standardize this sometime */
1000 static void
1001 go_to_link (EvView *view, EvLink *link)
1002 {
1003         EvLinkType type;
1004         const char *uri;
1005         int page;
1006
1007         type = ev_link_get_link_type (link);
1008
1009         switch (type) {
1010                 case EV_LINK_TYPE_TITLE:
1011                         break;
1012                 case EV_LINK_TYPE_PAGE:
1013                         page = ev_link_get_page (link);
1014                         ev_page_cache_set_current_page (view->page_cache, page);
1015                         break;
1016                 case EV_LINK_TYPE_EXTERNAL_URI:
1017                         uri = ev_link_get_uri (link);
1018                         gnome_vfs_url_show (uri);
1019                         break;
1020         }
1021 }
1022
1023 static char *
1024 status_message_from_link (EvView *view, EvLink *link)
1025 {
1026         EvLinkType type;
1027         char *msg = NULL;
1028         char *page_label;
1029
1030         type = ev_link_get_link_type (link);
1031
1032         switch (type) {
1033                 case EV_LINK_TYPE_TITLE:
1034                         if (ev_link_get_title (link))
1035                                 msg = g_strdup (ev_link_get_title (link));
1036                         break;
1037                 case EV_LINK_TYPE_PAGE:
1038                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1039                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1040                         g_free (page_label);
1041                         break;
1042                 case EV_LINK_TYPE_EXTERNAL_URI:
1043                         msg = g_strdup (ev_link_get_uri (link));
1044                         break;
1045                 default:
1046                         break;
1047         }
1048
1049         return msg;
1050 }
1051
1052
1053 /*** GtkWidget implementation ***/
1054
1055 static void
1056 ev_view_size_request_continuous_dual_page (EvView         *view,
1057                                            GtkRequisition *requisition)
1058 {
1059         int max_width;
1060         gint n_pages;
1061         GtkBorder border;
1062
1063         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1064         compute_border (view, max_width, max_width, &border);
1065
1066         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1067
1068         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1069         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1070
1071         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1072                 requisition->width = 1;
1073         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1074                 requisition->width = 1;
1075                 /* FIXME: This could actually be set on one page docs or docs
1076                  * with a strange aspect ratio. */
1077                 /* requisition->height = 1;*/
1078         }
1079 }
1080
1081 static void
1082 ev_view_size_request_continuous (EvView         *view,
1083                                  GtkRequisition *requisition)
1084 {
1085         int max_width;
1086         int n_pages;
1087         GtkBorder border;
1088
1089
1090         ev_page_cache_get_max_width (view->page_cache, view->scale, &max_width);
1091         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1092         compute_border (view, max_width, max_width, &border);
1093
1094         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1095         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1096
1097         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1098                 requisition->width = 1;
1099         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1100                 requisition->width = 1;
1101                 /* FIXME: This could actually be set on one page docs or docs
1102                  * with a strange aspect ratio. */
1103                 /* requisition->height = 1;*/
1104         }
1105 }
1106
1107 static void
1108 ev_view_size_request_dual_page (EvView         *view,
1109                                 GtkRequisition *requisition)
1110 {
1111         GtkBorder border;
1112         gint width, height;
1113
1114         /* Find the largest of the two. */
1115         ev_page_cache_get_size (view->page_cache,
1116                                 view->current_page,
1117                                 view->scale,
1118                                 &width, &height);
1119         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1120                 gint width_2, height_2;
1121                 ev_page_cache_get_size (view->page_cache,
1122                                         view->current_page + 1,
1123                                         view->scale,
1124                                         &width_2, &height_2);
1125                 if (width_2 > width) {
1126                         width = width_2;
1127                         height = height_2;
1128                 }
1129         }
1130         compute_border (view, width, height, &border);
1131
1132         requisition->width = ((width + border.left + border.right) * 2) +
1133                 (view->spacing * 3);
1134         requisition->height = (height + border.top + border.bottom) +
1135                 (view->spacing * 2);
1136
1137         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1138                 requisition->width = 1;
1139         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1140                 requisition->width = 1;
1141                 requisition->height = 1;
1142         }
1143 }
1144
1145 static void
1146 ev_view_size_request_single_page (EvView         *view,
1147                                   GtkRequisition *requisition)
1148 {
1149         GtkBorder border;
1150         gint width, height;
1151
1152         ev_page_cache_get_size (view->page_cache,
1153                                 view->current_page,
1154                                 view->scale,
1155                                 &width, &height);
1156         compute_border (view, width, height, &border);
1157
1158         requisition->width = width + border.left + border.right + (2 * view->spacing);
1159         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1160
1161         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1162                 requisition->width = 1;
1163                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1164         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1165                 requisition->width = 1;
1166                 requisition->height = 1;
1167         }
1168 }
1169
1170 static void
1171 ev_view_size_request (GtkWidget      *widget,
1172                       GtkRequisition *requisition)
1173 {
1174         EvView *view = EV_VIEW (widget);
1175
1176         if (view->document == NULL) {
1177                 requisition->width = 1;
1178                 requisition->height = 1;
1179                 return;
1180         }
1181
1182         if (view->presentation) {
1183                 requisition->width = 1;
1184                 requisition->height = 1;
1185                 return;
1186         }
1187
1188         if (view->continuous && view->dual_page)
1189                 ev_view_size_request_continuous_dual_page (view, requisition);
1190         else if (view->continuous)
1191                 ev_view_size_request_continuous (view, requisition);
1192         else if (view->dual_page)
1193                 ev_view_size_request_dual_page (view, requisition);
1194         else
1195                 ev_view_size_request_single_page (view, requisition);
1196 }
1197
1198 static void
1199 ev_view_size_allocate (GtkWidget      *widget,
1200                        GtkAllocation  *allocation)
1201 {
1202         EvView *view = EV_VIEW (widget);
1203
1204         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1205                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1206
1207                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1208
1209                 ev_view_size_request (widget, &widget->requisition);
1210         }
1211
1212         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1213         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1214
1215         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1216         view->pending_resize = FALSE;
1217
1218         if (view->document)
1219                 view_update_range_and_current_page (view);
1220
1221         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1222 }
1223
1224 static void
1225 ev_view_realize (GtkWidget *widget)
1226 {
1227         EvView *view = EV_VIEW (widget);
1228         GdkWindowAttr attributes;
1229
1230         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1231
1232
1233         attributes.window_type = GDK_WINDOW_CHILD;
1234         attributes.wclass = GDK_INPUT_OUTPUT;
1235         attributes.visual = gtk_widget_get_visual (widget);
1236         attributes.colormap = gtk_widget_get_colormap (widget);
1237
1238         attributes.x = widget->allocation.x;
1239         attributes.y = widget->allocation.y;
1240         attributes.width = widget->allocation.width;
1241         attributes.height = widget->allocation.height;
1242         attributes.event_mask = GDK_EXPOSURE_MASK |
1243                                 GDK_BUTTON_PRESS_MASK |
1244                                 GDK_BUTTON_RELEASE_MASK |
1245                                 GDK_SCROLL_MASK |
1246                                 GDK_KEY_PRESS_MASK |
1247                                 GDK_POINTER_MOTION_MASK |
1248                                 GDK_LEAVE_NOTIFY_MASK;
1249
1250         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1251                                          &attributes,
1252                                          GDK_WA_X | GDK_WA_Y |
1253                                          GDK_WA_COLORMAP |
1254                                          GDK_WA_VISUAL);
1255         gdk_window_set_user_data (widget->window, widget);
1256         widget->style = gtk_style_attach (widget->style, widget->window);
1257
1258         if (view->presentation)
1259                 gdk_window_set_background (widget->window, &widget->style->black);
1260         else
1261                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1262 }
1263
1264 static void
1265 ev_view_unrealize (GtkWidget *widget)
1266 {
1267         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1268 }
1269
1270 static gboolean
1271 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1272 {
1273         EvView *view = EV_VIEW (widget);
1274
1275         if ((event->state & GDK_CONTROL_MASK) != 0) {
1276
1277                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1278
1279                  if (event->direction == GDK_SCROLL_UP ||
1280                         event->direction == GDK_SCROLL_LEFT) {
1281                             if (ev_view_can_zoom_in (view)) {
1282                                     ev_view_zoom_in (view);
1283                             }
1284                  } else {
1285                             if (ev_view_can_zoom_out (view)) {
1286                                     ev_view_zoom_out (view);
1287                             }
1288                  }
1289                  return TRUE;
1290         }
1291
1292         if ((event->state & GDK_SHIFT_MASK) != 0) {
1293                 if (event->direction == GDK_SCROLL_UP)
1294                         event->direction = GDK_SCROLL_LEFT;
1295                 if (event->direction == GDK_SCROLL_DOWN)
1296                         event->direction = GDK_SCROLL_RIGHT;
1297         }
1298
1299         return FALSE;
1300 }
1301
1302 static EvViewSelection *
1303 find_selection_for_page (EvView *view,
1304                          gint    page)
1305 {
1306         GList *list;
1307
1308         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1309                 EvViewSelection *selection;
1310
1311                 selection = (EvViewSelection *) list->data;
1312
1313                 if (selection->page == page)
1314                         return selection;
1315         }
1316
1317         return NULL;
1318 }
1319
1320 static gboolean
1321 ev_view_expose_event (GtkWidget      *widget,
1322                       GdkEventExpose *event)
1323 {
1324         EvView *view = EV_VIEW (widget);
1325         int i;
1326
1327         if (view->document == NULL)
1328                 return FALSE;
1329
1330         for (i = view->start_page; i <= view->end_page; i++) {
1331                 GdkRectangle page_area;
1332                 GtkBorder border;
1333
1334                 if (!get_page_extents (view, i, &page_area, &border))
1335                         continue;
1336
1337                 page_area.x -= view->scroll_x;
1338                 page_area.y -= view->scroll_y;
1339
1340                 draw_one_page (view, i, &page_area, &border, &(event->area));
1341
1342                 if (EV_IS_DOCUMENT_FIND (view->document))
1343                         highlight_find_results (view, i);
1344         }
1345
1346         return FALSE;
1347 }
1348
1349 static gboolean
1350 ev_view_button_press_event (GtkWidget      *widget,
1351                             GdkEventButton *event)
1352 {
1353         EvView *view = EV_VIEW (widget);
1354
1355         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1356                 gtk_widget_grab_focus (widget);
1357         }
1358
1359         view->pressed_button = event->button;
1360
1361         switch (event->button) {
1362                 case 1:
1363                         if (view->selection_info.selections) {
1364                                 clear_selection (view);
1365                                 gtk_widget_queue_draw (widget);
1366                         }
1367
1368                         view->selection_info.start.x = event->x + view->scroll_x;
1369                         view->selection_info.start.y = event->y + view->scroll_y;
1370                         return TRUE;
1371                 case 2:
1372                         /* use root coordinates as reference point because
1373                          * scrolling changes window relative coordinates */
1374                         view->drag_info.start.x = event->x_root;
1375                         view->drag_info.start.y = event->y_root;
1376                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1377                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1378
1379                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1380
1381                         return TRUE;
1382         }
1383
1384         return FALSE;
1385 }
1386
1387 static gboolean
1388 ev_view_motion_notify_event (GtkWidget      *widget,
1389                              GdkEventMotion *event)
1390 {
1391         EvView *view = EV_VIEW (widget);
1392
1393         if (!view->document)
1394                 return FALSE;
1395
1396         if (view->pressed_button == 1) {
1397                 GdkPoint point;
1398
1399                 view->selection_info.in_selection = TRUE;
1400                 point.x = event->x + view->scroll_x;
1401                 point.y = event->y + view->scroll_y;
1402                 compute_selections (view, &view->selection_info.start, &point);
1403
1404                 return TRUE;
1405         } else if (view->pressed_button == 2) {
1406                 if (!view->drag_info.in_drag) {
1407                         gboolean start;
1408
1409                         start = gtk_drag_check_threshold (widget,
1410                                                           view->drag_info.start.x,
1411                                                           view->drag_info.start.y,
1412                                                           event->x_root,
1413                                                           event->y_root);
1414                         view->drag_info.in_drag = start;
1415                 }
1416
1417                 if (view->drag_info.in_drag) {
1418                         int dx, dy;
1419                         gdouble dhadj_value, dvadj_value;
1420
1421                         dx = event->x_root - view->drag_info.start.x;
1422                         dy = event->y_root - view->drag_info.start.y;
1423
1424                         dhadj_value = view->hadjustment->page_size *
1425                                       (gdouble)dx / widget->allocation.width;
1426                         dvadj_value = view->vadjustment->page_size *
1427                                       (gdouble)dy / widget->allocation.height;
1428
1429                         /* clamp scrolling to visible area */
1430                         gtk_adjustment_set_value (view->hadjustment,
1431                                                   MIN(view->drag_info.hadj - dhadj_value,
1432                                                       view->hadjustment->upper -
1433                                                       view->hadjustment->page_size));
1434                         gtk_adjustment_set_value (view->vadjustment,
1435                                                   MIN(view->drag_info.vadj - dvadj_value,
1436                                                       view->vadjustment->upper -
1437                                                       view->vadjustment->page_size));
1438
1439                         return TRUE;
1440                 }
1441         } else if (view->pressed_button <= 0) {
1442                 EvLink *link;
1443
1444                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1445                 if (link) {
1446                         char *msg;
1447
1448                         msg = status_message_from_link (view, link);
1449                         ev_view_set_status (view, msg);
1450                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1451                         g_free (msg);
1452                 } else if (location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y)) {
1453                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1454                 } else {
1455                         ev_view_set_status (view, NULL);
1456                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1457                             view->cursor == EV_VIEW_CURSOR_IBEAM)
1458                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1459                 }
1460                 return TRUE;
1461         }
1462
1463         return FALSE;
1464 }
1465
1466 static gboolean
1467 ev_view_button_release_event (GtkWidget      *widget,
1468                               GdkEventButton *event)
1469 {
1470         EvView *view = EV_VIEW (widget);
1471
1472         if (view->pressed_button == 2) {
1473                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1474         }
1475
1476         view->pressed_button = -1;
1477         view->drag_info.in_drag = FALSE;
1478
1479         if (view->selection_info.selections) {
1480                 ev_view_update_primary_selection (view);
1481         } else if (view->document) {
1482                 EvLink *link;
1483
1484                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1485                 if (link) {
1486                         go_to_link (view, link);
1487                 }
1488         }
1489
1490         return FALSE;
1491 }
1492
1493 static gboolean
1494 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1495 {
1496         ev_view_set_cursor (EV_VIEW (widget), EV_VIEW_CURSOR_NORMAL);
1497         return FALSE;
1498 }
1499
1500 /*** Drawing ***/
1501
1502 static guint32
1503 ev_gdk_color_to_rgb (const GdkColor *color)
1504 {
1505   guint32 result;
1506   result = (0xff0000 | (color->red & 0xff00));
1507   result <<= 8;
1508   result |= ((color->green & 0xff00) | (color->blue >> 8));
1509   return result;
1510 }
1511
1512 static void
1513 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1514                  const GdkRectangle *rect, guchar alpha)
1515 {
1516         GdkGC *gc;
1517         GdkPixbuf *pixbuf;
1518         GdkColor *fill_color_gdk;
1519         guint fill_color;
1520
1521         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1522         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1523
1524         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1525                                  rect->width, rect->height);
1526         gdk_pixbuf_fill (pixbuf, fill_color);
1527
1528         gdk_draw_pixbuf (window, NULL, pixbuf,
1529                          0, 0,
1530                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1531                          rect->width, rect->height,
1532                          GDK_RGB_DITHER_NONE,
1533                          0, 0);
1534
1535         g_object_unref (pixbuf);
1536
1537         gc = gdk_gc_new (window);
1538         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1539         gdk_draw_rectangle (window, gc, FALSE,
1540                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1541                             rect->width - 1,
1542                             rect->height - 1);
1543         g_object_unref (gc);
1544
1545         gdk_color_free (fill_color_gdk);
1546 }
1547
1548
1549 static void
1550 highlight_find_results (EvView *view, int page)
1551 {
1552         EvDocumentFind *find;
1553         int i, results = 0;
1554
1555         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1556
1557         find = EV_DOCUMENT_FIND (view->document);
1558
1559         results = ev_document_find_get_n_results (find, page);
1560
1561         for (i = 0; i < results; i++) {
1562                 EvRectangle rectangle;
1563                 GdkRectangle view_rectangle;
1564                 guchar alpha;
1565
1566                 if (i == view->find_result && page == view->find_page) {
1567                         alpha = 0x90;
1568                 } else {
1569                         alpha = 0x20;
1570                 }
1571
1572                 ev_document_find_get_result (find, page,
1573                                              i, &rectangle);
1574                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1575                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1576                                  &view_rectangle, alpha);
1577         }
1578 }
1579
1580 static void
1581 draw_one_page (EvView          *view,
1582                gint             page,
1583                GdkRectangle    *page_area,
1584                GtkBorder       *border,
1585                GdkRectangle    *expose_area)
1586 {
1587         gint width, height;
1588         GdkPixbuf *current_pixbuf;
1589         GdkRectangle overlap;
1590         GdkRectangle real_page_area;
1591         EvViewSelection *selection;
1592
1593         g_assert (view->document);
1594         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1595                 return;
1596
1597         selection = find_selection_for_page (view, page);
1598         ev_page_cache_get_size (view->page_cache,
1599                                 page, view->scale,
1600                                 &width, &height);
1601         /* Render the document itself */
1602         real_page_area = *page_area;
1603
1604         real_page_area.x += border->left;
1605         real_page_area.y += border->top;
1606         real_page_area.width -= (border->left + border->right);
1607         real_page_area.height -= (border->top + border->bottom);
1608
1609         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1610                                          GTK_WIDGET (view),
1611                                          page_area, border);
1612
1613         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1614                 GdkPixbuf *selection_pixbuf = NULL;
1615                 GdkPixbuf *scaled_image;
1616                 GdkPixbuf *scaled_selection;
1617
1618                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1619
1620                 /* Get the selection pixbuf iff we have something to draw */
1621                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
1622                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
1623                                                                                  page,
1624                                                                                  view->scale);
1625
1626                 if (current_pixbuf == NULL)
1627                         scaled_image = NULL;
1628                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1629                          height == gdk_pixbuf_get_height (current_pixbuf))
1630                         scaled_image = g_object_ref (current_pixbuf);
1631                 else
1632                         /* FIXME: We don't want to scale the whole area, just the right
1633                          * area of it */
1634                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1635                                                                 width, height,
1636                                                                 GDK_INTERP_NEAREST);
1637
1638                 if (selection_pixbuf == NULL)
1639                         scaled_selection = NULL;
1640                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
1641                          height == gdk_pixbuf_get_height (selection_pixbuf))
1642                         scaled_selection = g_object_ref (selection_pixbuf);
1643                 else
1644                         /* FIXME: We don't want to scale the whole area, just the right
1645                          * area of it */
1646                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
1647                                                                     width, height,
1648                                                                     GDK_INTERP_NEAREST);
1649
1650                 if (scaled_image) {
1651                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1652                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1653                                          scaled_image,
1654                                          overlap.x - real_page_area.x,
1655                                          overlap.y - real_page_area.y,
1656                                          overlap.x, overlap.y,
1657                                          overlap.width, overlap.height,
1658                                          GDK_RGB_DITHER_NORMAL,
1659                                          0, 0);
1660                         g_object_unref (scaled_image);
1661                 }
1662
1663                 if (scaled_selection) {
1664                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1665                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1666                                          scaled_selection,
1667                                          overlap.x - real_page_area.x,
1668                                          overlap.y - real_page_area.y,
1669                                          overlap.x, overlap.y,
1670                                          overlap.width, overlap.height,
1671                                          GDK_RGB_DITHER_NORMAL,
1672                                          0, 0);
1673                         g_object_unref (scaled_selection);
1674                 }
1675         }
1676 }
1677
1678 /*** GObject functions ***/
1679
1680 static void
1681 ev_view_finalize (GObject *object)
1682 {
1683         EvView *view = EV_VIEW (object);
1684
1685         LOG ("Finalize");
1686
1687         g_free (view->status);
1688         g_free (view->find_status);
1689
1690         clear_selection (view);
1691
1692         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1693 }
1694
1695 static void
1696 ev_view_destroy (GtkObject *object)
1697 {
1698         EvView *view = EV_VIEW (object);
1699
1700         if (view->document) {
1701                 g_object_unref (view->document);
1702                 view->document = NULL;
1703         }
1704         if (view->pixbuf_cache) {
1705                 g_object_unref (view->pixbuf_cache);
1706                 view->pixbuf_cache = NULL;
1707         }
1708         ev_view_set_scroll_adjustments (view, NULL, NULL);
1709
1710         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1711 }
1712
1713 static void
1714 ev_view_set_property (GObject      *object,
1715                       guint         prop_id,
1716                       const GValue *value,
1717                       GParamSpec   *pspec)
1718 {
1719         EvView *view = EV_VIEW (object);
1720
1721         switch (prop_id)
1722         {
1723         case PROP_CONTINUOUS:
1724                 ev_view_set_continuous (view, g_value_get_boolean (value));
1725                 break;
1726         case PROP_DUAL_PAGE:
1727                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1728                 break;
1729         case PROP_FULLSCREEN:
1730                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1731                 break;
1732         case PROP_PRESENTATION:
1733                 ev_view_set_presentation (view, g_value_get_boolean (value));
1734                 break;
1735         case PROP_SIZING_MODE:
1736                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1737                 break;
1738         case PROP_ZOOM:
1739                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1740                 break;
1741         default:
1742                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1743         }
1744 }
1745
1746 static void
1747 ev_view_get_property (GObject *object,
1748                       guint prop_id,
1749                       GValue *value,
1750                       GParamSpec *pspec)
1751 {
1752         EvView *view = EV_VIEW (object);
1753
1754         switch (prop_id)
1755         {
1756         case PROP_STATUS:
1757                 g_value_set_string (value, view->status);
1758                 break;
1759         case PROP_FIND_STATUS:
1760                 g_value_set_string (value, view->status);
1761                 break;
1762         case PROP_CONTINUOUS:
1763                 g_value_set_boolean (value, view->continuous);
1764                 break;
1765         case PROP_DUAL_PAGE:
1766                 g_value_set_boolean (value, view->dual_page);
1767                 break;
1768         case PROP_FULLSCREEN:
1769                 g_value_set_boolean (value, view->fullscreen);
1770                 break;
1771         case PROP_PRESENTATION:
1772                 g_value_set_boolean (value, view->presentation);
1773                 break;
1774         case PROP_SIZING_MODE:
1775                 g_value_set_enum (value, view->sizing_mode);
1776                 break;
1777         case PROP_ZOOM:
1778                 g_value_set_double (value, view->scale);
1779                 break;
1780         default:
1781                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1782         }
1783 }
1784
1785 static void
1786 ev_view_class_init (EvViewClass *class)
1787 {
1788         GObjectClass *object_class = G_OBJECT_CLASS (class);
1789         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1790         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1791         GtkBindingSet *binding_set;
1792
1793         object_class->finalize = ev_view_finalize;
1794         object_class->set_property = ev_view_set_property;
1795         object_class->get_property = ev_view_get_property;
1796
1797         widget_class->expose_event = ev_view_expose_event;
1798         widget_class->button_press_event = ev_view_button_press_event;
1799         widget_class->motion_notify_event = ev_view_motion_notify_event;
1800         widget_class->button_release_event = ev_view_button_release_event;
1801         widget_class->size_request = ev_view_size_request;
1802         widget_class->size_allocate = ev_view_size_allocate;
1803         widget_class->realize = ev_view_realize;
1804         widget_class->unrealize = ev_view_unrealize;
1805         widget_class->scroll_event = ev_view_scroll_event;
1806         widget_class->leave_notify_event = ev_view_leave_notify_event;
1807         gtk_object_class->destroy = ev_view_destroy;
1808
1809         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1810         class->binding_activated = ev_view_binding_activated;
1811
1812         widget_class->set_scroll_adjustments_signal =
1813             g_signal_new ("set-scroll-adjustments",
1814                           G_OBJECT_CLASS_TYPE (object_class),
1815                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1816                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1817                           NULL, NULL,
1818                           ev_marshal_VOID__OBJECT_OBJECT,
1819                           G_TYPE_NONE, 2,
1820                           GTK_TYPE_ADJUSTMENT,
1821                           GTK_TYPE_ADJUSTMENT);
1822
1823         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
1824                          G_TYPE_FROM_CLASS (object_class),
1825                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1826                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
1827                          NULL, NULL,
1828                          ev_marshal_VOID__ENUM_BOOLEAN,
1829                          G_TYPE_NONE, 2,
1830                          GTK_TYPE_SCROLL_TYPE,
1831                          G_TYPE_BOOLEAN);
1832
1833         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1834                          G_TYPE_FROM_CLASS (object_class),
1835                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1836                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1837                          NULL, NULL,
1838                          ev_marshal_VOID__VOID,
1839                          G_TYPE_NONE, 0, G_TYPE_NONE);
1840
1841         g_object_class_install_property (object_class,
1842                                          PROP_STATUS,
1843                                          g_param_spec_string ("status",
1844                                                               "Status Message",
1845                                                               "The status message",
1846                                                               NULL,
1847                                                               G_PARAM_READABLE));
1848
1849         g_object_class_install_property (object_class,
1850                                          PROP_FIND_STATUS,
1851                                          g_param_spec_string ("find-status",
1852                                                               "Find Status Message",
1853                                                               "The find status message",
1854                                                               NULL,
1855                                                               G_PARAM_READABLE));
1856
1857         g_object_class_install_property (object_class,
1858                                          PROP_CONTINUOUS,
1859                                          g_param_spec_boolean ("continuous",
1860                                                                "Continuous",
1861                                                                "Continuous scrolling mode",
1862                                                                TRUE,
1863                                                                G_PARAM_READWRITE));
1864
1865         g_object_class_install_property (object_class,
1866                                          PROP_DUAL_PAGE,
1867                                          g_param_spec_boolean ("dual-page",
1868                                                                "Dual Page",
1869                                                                "Two pages visible at once",
1870                                                                FALSE,
1871                                                                G_PARAM_READWRITE));
1872         g_object_class_install_property (object_class,
1873                                          PROP_FULLSCREEN,
1874                                          g_param_spec_boolean ("fullscreen",
1875                                                                "Full Screen",
1876                                                                "Draw page in a fullscreen fashion",
1877                                                                FALSE,
1878                                                                G_PARAM_READWRITE));
1879         g_object_class_install_property (object_class,
1880                                          PROP_PRESENTATION,
1881                                          g_param_spec_boolean ("presentation",
1882                                                                "Presentation",
1883                                                                "Draw page in presentation mode",
1884                                                                TRUE,
1885                                                                G_PARAM_READWRITE));
1886
1887         g_object_class_install_property (object_class,
1888                                          PROP_SIZING_MODE,
1889                                          g_param_spec_enum ("sizing-mode",
1890                                                             "Sizing Mode",
1891                                                             "Sizing Mode",
1892                                                             EV_TYPE_SIZING_MODE,
1893                                                             EV_SIZING_FIT_WIDTH,
1894                                                             G_PARAM_READWRITE));
1895
1896         g_object_class_install_property (object_class,
1897                                          PROP_ZOOM,
1898                                          g_param_spec_double ("zoom",
1899                                                               "Zoom factor",
1900                                                                "Zoom factor",
1901                                                                MIN_SCALE,
1902                                                                MAX_SCALE,
1903                                                                1.0,
1904                                                                G_PARAM_READWRITE));
1905
1906         binding_set = gtk_binding_set_by_class (class);
1907
1908         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1909         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1910         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1911         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1912 }
1913
1914 static void
1915 ev_view_init (EvView *view)
1916 {
1917         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1918
1919         view->spacing = 5;
1920         view->scale = 1.0;
1921         view->current_page = 0;
1922         view->pressed_button = -1;
1923         view->cursor = EV_VIEW_CURSOR_NORMAL;
1924         view->drag_info.in_drag = FALSE;
1925         view->selection_info.in_selection = FALSE;
1926
1927         view->selection_mode = EV_VIEW_SELECTION_TEXT;
1928         view->continuous = TRUE;
1929         view->dual_page = FALSE;
1930         view->presentation = FALSE;
1931         view->fullscreen = FALSE;
1932         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1933         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1934 }
1935
1936 /*** Callbacks ***/
1937
1938 static void
1939 find_changed_cb (EvDocument *document, int page, EvView *view)
1940 {
1941         jump_to_find_page (view);
1942         jump_to_find_result (view);
1943         update_find_status_message (view);
1944
1945         if (view->current_page == page)
1946                 gtk_widget_queue_draw (GTK_WIDGET (view));
1947 }
1948
1949 static void
1950 job_finished_cb (EvPixbufCache *pixbuf_cache,
1951                  EvView        *view)
1952 {
1953         gtk_widget_queue_draw (GTK_WIDGET (view));
1954 }
1955
1956 static void
1957 page_changed_cb (EvPageCache *page_cache,
1958                  int          new_page,
1959                  EvView      *view)
1960 {
1961         if (view->current_page != new_page) {
1962
1963                 view->current_page = new_page;
1964                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1965                 gtk_widget_queue_resize (GTK_WIDGET (view));
1966
1967                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1968                         view->find_page = new_page;
1969                         view->find_result = 0;
1970                         update_find_status_message (view);
1971                 }
1972         }
1973 }
1974
1975 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1976                                          EvView *view)
1977 {
1978         int dx = 0, dy = 0;
1979
1980         if (! GTK_WIDGET_REALIZED (view))
1981                 return;
1982
1983         if (view->hadjustment) {
1984                 dx = view->scroll_x - (int) view->hadjustment->value;
1985                 view->scroll_x = (int) view->hadjustment->value;
1986         } else {
1987                 view->scroll_x = 0;
1988         }
1989
1990         if (view->vadjustment) {
1991                 dy = view->scroll_y - (int) view->vadjustment->value;
1992                 view->scroll_y = (int) view->vadjustment->value;
1993         } else {
1994                 view->scroll_y = 0;
1995         }
1996
1997
1998         if (view->pending_resize)
1999                 gtk_widget_queue_draw (GTK_WIDGET (view));
2000         else
2001                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2002
2003
2004         if (view->document)
2005                 view_update_range_and_current_page (view);
2006 }
2007
2008 GtkWidget*
2009 ev_view_new (void)
2010 {
2011         GtkWidget *view;
2012
2013         view = g_object_new (EV_TYPE_VIEW, NULL);
2014
2015         return view;
2016 }
2017
2018 static void
2019 setup_caches (EvView *view)
2020 {
2021         view->page_cache = ev_page_cache_get (view->document);
2022         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2023         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
2024         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2025 }
2026
2027 static void
2028 clear_caches (EvView *view)
2029 {
2030         if (view->pixbuf_cache) {
2031                 g_object_unref (view->pixbuf_cache);
2032                 view->pixbuf_cache = NULL;
2033         }
2034
2035         if (view->document) {
2036                 ev_page_cache_clear (view->document);
2037         }
2038 }
2039
2040 void
2041 ev_view_set_document (EvView     *view,
2042                       EvDocument *document)
2043 {
2044         g_return_if_fail (EV_IS_VIEW (view));
2045
2046         if (document != view->document) {
2047                 clear_caches (view);
2048
2049                 if (view->document) {
2050                         g_signal_handlers_disconnect_by_func (view->document,
2051                                                               find_changed_cb,
2052                                                               view);
2053                         g_object_unref (view->document);
2054                         view->page_cache = NULL;
2055
2056                 }
2057
2058                 view->document = document;
2059                 view->find_page = 0;
2060                 view->find_result = 0;
2061
2062                 if (view->document) {
2063                         g_object_ref (view->document);
2064                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2065                                 g_signal_connect (view->document,
2066                                                   "find_changed",
2067                                                   G_CALLBACK (find_changed_cb),
2068                                                   view);
2069                         }
2070
2071                         setup_caches (view);
2072                 }
2073
2074                 gtk_widget_queue_resize (GTK_WIDGET (view));
2075         }
2076 }
2077
2078 /*** Zoom and sizing mode ***/
2079
2080 #define EPSILON 0.0000001
2081 void
2082 ev_view_set_zoom (EvView   *view,
2083                   double    factor,
2084                   gboolean  relative)
2085 {
2086         double scale;
2087
2088         if (relative)
2089                 scale = view->scale * factor;
2090         else
2091                 scale = factor;
2092
2093         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2094
2095         if (ABS (view->scale - scale) < EPSILON)
2096                 return;
2097
2098         view->scale = scale;
2099         view->pending_resize = TRUE;
2100
2101         gtk_widget_queue_resize (GTK_WIDGET (view));
2102
2103         g_object_notify (G_OBJECT (view), "zoom");
2104 }
2105
2106 double
2107 ev_view_get_zoom (EvView *view)
2108 {
2109         return view->scale;
2110 }
2111
2112 gboolean
2113 ev_view_get_continuous (EvView *view)
2114 {
2115         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2116
2117         return view->continuous;
2118 }
2119
2120 void
2121 ev_view_set_continuous (EvView   *view,
2122                         gboolean  continuous)
2123 {
2124         g_return_if_fail (EV_IS_VIEW (view));
2125
2126         continuous = continuous != FALSE;
2127
2128         if (view->continuous != continuous) {
2129                 view->continuous = continuous;
2130                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2131                 gtk_widget_queue_resize (GTK_WIDGET (view));
2132         }
2133
2134         g_object_notify (G_OBJECT (view), "continuous");
2135 }
2136
2137 gboolean
2138 ev_view_get_dual_page (EvView *view)
2139 {
2140         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2141
2142         return view->dual_page;
2143 }
2144
2145 void
2146 ev_view_set_dual_page (EvView   *view,
2147                        gboolean  dual_page)
2148 {
2149         g_return_if_fail (EV_IS_VIEW (view));
2150
2151         dual_page = dual_page != FALSE;
2152
2153         if (view->dual_page == dual_page)
2154                 return;
2155
2156         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2157         view->dual_page = dual_page;
2158         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2159          * preload_cache_size to be 2 if dual_page is set.
2160          */
2161         gtk_widget_queue_resize (GTK_WIDGET (view));
2162
2163         g_object_notify (G_OBJECT (view), "dual-page");
2164 }
2165
2166 void
2167 ev_view_set_fullscreen (EvView   *view,
2168                          gboolean  fullscreen)
2169 {
2170         g_return_if_fail (EV_IS_VIEW (view));
2171
2172         fullscreen = fullscreen != FALSE;
2173
2174         if (view->fullscreen == fullscreen)
2175                 return;
2176
2177         view->fullscreen = fullscreen;
2178         gtk_widget_queue_resize (GTK_WIDGET (view));
2179
2180         g_object_notify (G_OBJECT (view), "fullscreen");
2181 }
2182
2183 gboolean
2184 ev_view_get_fullscreen (EvView *view)
2185 {
2186         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2187
2188         return view->fullscreen;
2189 }
2190
2191 void
2192 ev_view_set_presentation (EvView   *view,
2193                           gboolean  presentation)
2194 {
2195         g_return_if_fail (EV_IS_VIEW (view));
2196
2197         presentation = presentation != FALSE;
2198
2199         if (view->presentation == presentation)
2200                 return;
2201
2202         view->presentation = presentation;
2203         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2204         gtk_widget_queue_resize (GTK_WIDGET (view));
2205
2206         if (GTK_WIDGET_REALIZED (view)) {
2207                 if (view->presentation)
2208                         gdk_window_set_background (GTK_WIDGET(view)->window,
2209                                                    &GTK_WIDGET (view)->style->black);
2210                 else
2211                         gdk_window_set_background (GTK_WIDGET(view)->window,
2212                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2213         }
2214
2215
2216         g_object_notify (G_OBJECT (view), "presentation");
2217 }
2218
2219 gboolean
2220 ev_view_get_presentation (EvView *view)
2221 {
2222         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2223
2224         return view->presentation;
2225 }
2226
2227 void
2228 ev_view_set_sizing_mode (EvView       *view,
2229                          EvSizingMode  sizing_mode)
2230 {
2231         g_return_if_fail (EV_IS_VIEW (view));
2232
2233         if (view->sizing_mode == sizing_mode)
2234                 return;
2235
2236         view->sizing_mode = sizing_mode;
2237         gtk_widget_queue_resize (GTK_WIDGET (view));
2238
2239         g_object_notify (G_OBJECT (view), "sizing-mode");
2240 }
2241
2242 EvSizingMode
2243 ev_view_get_sizing_mode (EvView *view)
2244 {
2245         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2246
2247         return view->sizing_mode;
2248 }
2249
2250 gboolean
2251 ev_view_can_zoom_in (EvView *view)
2252 {
2253         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2254 }
2255
2256 gboolean
2257 ev_view_can_zoom_out (EvView *view)
2258 {
2259         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2260 }
2261
2262 void
2263 ev_view_zoom_in (EvView *view)
2264 {
2265         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2266
2267         view->pending_scroll = SCROLL_TO_CENTER;
2268         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2269 }
2270
2271 void
2272 ev_view_zoom_out (EvView *view)
2273 {
2274         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2275
2276         view->pending_scroll = SCROLL_TO_CENTER;
2277         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2278 }
2279
2280 static void
2281 ev_view_set_orientation (EvView         *view,
2282                          EvOrientation   orientation)
2283 {
2284         ev_document_set_orientation (view->document, orientation);
2285
2286         clear_caches (view);
2287         setup_caches (view);
2288
2289         gtk_widget_queue_resize (GTK_WIDGET (view));
2290 }
2291
2292 void
2293 ev_view_rotate_right (EvView *view)
2294 {
2295         EvOrientation orientation, new_orientation;
2296
2297         orientation = ev_document_get_orientation (view->document);
2298         if (orientation == EV_ORIENTATION_PORTRAIT) {
2299                 new_orientation = EV_ORIENTATION_LANDSCAPE;
2300         } else if (orientation == EV_ORIENTATION_LANDSCAPE) {
2301                 new_orientation = EV_ORIENTATION_UPSIDEDOWN;
2302         } else if (orientation == EV_ORIENTATION_UPSIDEDOWN) {
2303                 new_orientation = EV_ORIENTATION_SEASCAPE;
2304         } else {
2305                 new_orientation = EV_ORIENTATION_PORTRAIT;
2306         }
2307         ev_view_set_orientation (view, new_orientation);
2308 }
2309
2310 void
2311 ev_view_rotate_left (EvView *view)
2312 {
2313         EvOrientation orientation, new_orientation;
2314
2315         orientation = ev_document_get_orientation (view->document);
2316         if (orientation == EV_ORIENTATION_PORTRAIT) {
2317                 new_orientation = EV_ORIENTATION_SEASCAPE;
2318         } else if (orientation == EV_ORIENTATION_SEASCAPE) {
2319                 new_orientation = EV_ORIENTATION_UPSIDEDOWN;
2320         } else if (orientation == EV_ORIENTATION_UPSIDEDOWN) {
2321                 new_orientation = EV_ORIENTATION_LANDSCAPE;
2322         } else {
2323                 new_orientation = EV_ORIENTATION_PORTRAIT;
2324         }
2325         ev_view_set_orientation (view, new_orientation);
2326 }
2327
2328 static double
2329 zoom_for_size_fit_width (int doc_width,
2330                          int doc_height,
2331                          int target_width,
2332                          int target_height,
2333                          int vsb_width)
2334 {
2335         double scale;
2336
2337         scale = (double)target_width / doc_width;
2338
2339         if (doc_height * scale > target_height)
2340                 scale = (double) (target_width - vsb_width) / doc_width;
2341
2342         return scale;
2343 }
2344
2345 static double
2346 zoom_for_size_best_fit (int doc_width,
2347                         int doc_height,
2348                         int target_width,
2349                         int target_height,
2350                         int vsb_width,
2351                         int hsb_width)
2352 {
2353         double w_scale;
2354         double h_scale;
2355
2356         w_scale = (double)target_width / doc_width;
2357         h_scale = (double)target_height / doc_height;
2358
2359         if (doc_height * w_scale > target_height)
2360                 w_scale = (double) (target_width - vsb_width) / doc_width;
2361         if (doc_width * h_scale > target_width)
2362                 h_scale = (double) (target_height - hsb_width) / doc_height;
2363
2364         return MIN (w_scale, h_scale);
2365 }
2366
2367
2368 static void
2369 ev_view_zoom_for_size_presentation (EvView *view,
2370                                     int     width,
2371                                     int     height)
2372 {
2373         int doc_width, doc_height;
2374         gdouble scale;
2375
2376         ev_page_cache_get_size (view->page_cache,
2377                                 view->current_page,
2378                                 1.0,
2379                                 &doc_width,
2380                                 &doc_height);
2381         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2382         ev_view_set_zoom (view, scale, FALSE);
2383 }
2384
2385 static void
2386 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2387                            int     width,
2388                            int     height,
2389                            int     vsb_width,
2390                            int     hsb_height)
2391 {
2392         int doc_width, doc_height;
2393         GtkBorder border;
2394         gdouble scale;
2395
2396         ev_page_cache_get_max_width (view->page_cache,
2397                                      1.0,
2398                                      &doc_width);
2399         ev_page_cache_get_max_height (view->page_cache,
2400                                       1.0,
2401                                       &doc_height);
2402         compute_border (view, doc_width, doc_height, &border);
2403
2404         doc_width = doc_width * 2;
2405         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2406         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2407
2408         /* FIXME: We really need to calculate the overall height here, not the
2409          * page height.  We assume there's always a vertical scrollbar for
2410          * now.  We need to fix this. */
2411         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2412                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2413         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2414                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2415         else
2416                 g_assert_not_reached ();
2417
2418         ev_view_set_zoom (view, scale, FALSE);
2419 }
2420
2421 static void
2422 ev_view_zoom_for_size_continuous (EvView *view,
2423                                   int     width,
2424                                   int     height,
2425                                   int     vsb_width,
2426                                   int     hsb_height)
2427 {
2428         int doc_width, doc_height;
2429         GtkBorder border;
2430         gdouble scale;
2431
2432         ev_page_cache_get_max_width (view->page_cache,
2433                                      1.0,
2434                                      &doc_width);
2435         ev_page_cache_get_max_height (view->page_cache,
2436                                       1.0,
2437                                       &doc_height);
2438         compute_border (view, doc_width, doc_height, &border);
2439
2440         width -= (border.left + border.right + 2 * view->spacing);
2441         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2442
2443         /* FIXME: We really need to calculate the overall height here, not the
2444          * page height.  We assume there's always a vertical scrollbar for
2445          * now.  We need to fix this. */
2446         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2447                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2448         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2449                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2450         else
2451                 g_assert_not_reached ();
2452
2453         ev_view_set_zoom (view, scale, FALSE);
2454 }
2455
2456 static void
2457 ev_view_zoom_for_size_dual_page (EvView *view,
2458                                  int     width,
2459                                  int     height,
2460                                  int     vsb_width,
2461                                  int     hsb_height)
2462 {
2463         GtkBorder border;
2464         gint doc_width, doc_height;
2465         gdouble scale;
2466         gint other_page;
2467
2468         other_page = view->current_page ^ 1;
2469
2470         /* Find the largest of the two. */
2471         ev_page_cache_get_size (view->page_cache,
2472                                 view->current_page,
2473                                 1.0,
2474                                 &doc_width, &doc_height);
2475
2476         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2477                 gint width_2, height_2;
2478                 ev_page_cache_get_size (view->page_cache,
2479                                         other_page,
2480                                         1.0,
2481                                         &width_2, &height_2);
2482                 if (width_2 > doc_width)
2483                         doc_width = width_2;
2484                 if (height_2 > doc_height)
2485                         doc_height = height_2;
2486         }
2487         compute_border (view, doc_width, doc_height, &border);
2488
2489         doc_width = doc_width * 2;
2490         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2491         height -= (border.top + border.bottom + 2 * view->spacing);
2492
2493         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2494                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2495         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2496                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2497         else
2498                 g_assert_not_reached ();
2499
2500         ev_view_set_zoom (view, scale, FALSE);
2501 }
2502
2503 static void
2504 ev_view_zoom_for_size_single_page (EvView *view,
2505                                    int     width,
2506                                    int     height,
2507                                    int     vsb_width,
2508                                    int     hsb_height)
2509 {
2510         int doc_width, doc_height;
2511         GtkBorder border;
2512         gdouble scale;
2513
2514         ev_page_cache_get_size (view->page_cache,
2515                                 view->current_page,
2516                                 1.0,
2517                                 &doc_width,
2518                                 &doc_height);
2519         /* Get an approximate border */
2520         compute_border (view, width, height, &border);
2521
2522         width -= (border.left + border.right + 2 * view->spacing);
2523         height -= (border.top + border.bottom + 2 * view->spacing);
2524
2525         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2526                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2527         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2528                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2529         else
2530                 g_assert_not_reached ();
2531
2532         ev_view_set_zoom (view, scale, FALSE);
2533 }
2534
2535 void
2536 ev_view_set_zoom_for_size (EvView *view,
2537                            int     width,
2538                            int     height,
2539                            int     vsb_width,
2540                            int     hsb_height)
2541 {
2542         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2543                           view->sizing_mode == EV_SIZING_BEST_FIT);
2544         g_return_if_fail (width >= 0);
2545         g_return_if_fail (height >= 0);
2546
2547         if (view->document == NULL)
2548                 return;
2549
2550         if (view->presentation)
2551                 ev_view_zoom_for_size_presentation (view, width, height);
2552         else if (view->continuous && view->dual_page)
2553                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2554         else if (view->continuous)
2555                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2556         else if (view->dual_page)
2557                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2558         else
2559                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2560 }
2561
2562 /*** Status text messages ***/
2563
2564 const char *
2565 ev_view_get_status (EvView *view)
2566 {
2567         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2568
2569         return view->status;
2570 }
2571
2572 static void
2573 ev_view_set_status (EvView *view, const char *message)
2574 {
2575         g_return_if_fail (EV_IS_VIEW (view));
2576
2577         if (message != view->status) {
2578                 g_free (view->status);
2579                 view->status = g_strdup (message);
2580                 g_object_notify (G_OBJECT (view), "status");
2581         }
2582 }
2583
2584 static void
2585 update_find_status_message (EvView *view)
2586 {
2587         char *message;
2588
2589         if (view->current_page == view->find_page) {
2590                 int results;
2591
2592                 results = ev_document_find_get_n_results
2593                                 (EV_DOCUMENT_FIND (view->document),
2594                                  view->current_page);
2595                 /* TRANS: Sometimes this could be better translated as
2596                    "%d hit(s) on this page".  Therefore this string
2597                    contains plural cases. */
2598                 message = g_strdup_printf (ngettext ("%d found on this page",
2599                                                      "%d found on this page",
2600                                                      results),
2601                                            results);
2602         } else {
2603                 double percent;
2604
2605                 percent = ev_document_find_get_progress
2606                                 (EV_DOCUMENT_FIND (view->document));
2607                 if (percent >= (1.0 - 1e-10)) {
2608                         message = g_strdup (_("Not found"));
2609                 } else {
2610                         message = g_strdup_printf (_("%3d%% remaining to search"),
2611                                                    (int) ((1.0 - percent) * 100));
2612                 }
2613
2614         }
2615         ev_view_set_find_status (view, message);
2616         g_free (message);
2617 }
2618
2619 const char *
2620 ev_view_get_find_status (EvView *view)
2621 {
2622         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2623
2624         return view->find_status;
2625 }
2626
2627 static void
2628 ev_view_set_find_status (EvView *view, const char *message)
2629 {
2630         g_return_if_fail (EV_IS_VIEW (view));
2631
2632         g_free (view->find_status);
2633         view->find_status = g_strdup (message);
2634         g_object_notify (G_OBJECT (view), "find-status");
2635 }
2636
2637 /*** Find ***/
2638
2639 static void
2640 jump_to_find_result (EvView *view)
2641 {
2642         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2643         EvRectangle rect;
2644         GdkRectangle view_rect;
2645         int n_results;
2646         int page = view->find_page;
2647
2648         n_results = ev_document_find_get_n_results (find, page);
2649
2650         if (n_results > view->find_result) {
2651                 ev_document_find_get_result
2652                         (find, page, view->find_result, &rect);
2653
2654                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2655                 ensure_rectangle_is_visible (view, &view_rect);
2656         }
2657 }
2658
2659 static void
2660 jump_to_find_page (EvView *view)
2661 {
2662         int n_pages, i;
2663
2664         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2665
2666         for (i = 0; i < n_pages; i++) {
2667                 int has_results;
2668                 int page;
2669
2670                 page = i + view->find_page;
2671                 if (page >= n_pages) {
2672                         page = page - n_pages;
2673                 }
2674
2675                 has_results = ev_document_find_page_has_results
2676                                 (EV_DOCUMENT_FIND (view->document), page);
2677                 if (has_results == -1) {
2678                         view->find_page = page;
2679                         break;
2680                 } else if (has_results == 1) {
2681                         ev_page_cache_set_current_page (view->page_cache, page);
2682                         jump_to_find_result (view);
2683                         break;
2684                 }
2685         }
2686 }
2687
2688 gboolean
2689 ev_view_can_find_next (EvView *view)
2690 {
2691         int n_results = 0;
2692
2693         if (EV_IS_DOCUMENT_FIND (view->document)) {
2694                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2695
2696                 n_results = ev_document_find_get_n_results (find, view->current_page);
2697         }
2698
2699         return n_results > 0;
2700 }
2701
2702 void
2703 ev_view_find_next (EvView *view)
2704 {
2705         EvPageCache *page_cache;
2706         int n_results, n_pages;
2707         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2708
2709         page_cache = ev_page_cache_get (view->document);
2710         n_results = ev_document_find_get_n_results (find, view->current_page);
2711
2712         n_pages = ev_page_cache_get_n_pages (page_cache);
2713
2714         view->find_result++;
2715
2716         if (view->find_result >= n_results) {
2717                 view->find_result = 0;
2718                 view->find_page++;
2719
2720                 if (view->find_page >= n_pages) {
2721                         view->find_page = 0;
2722                 }
2723
2724                 jump_to_find_page (view);
2725         } else {
2726                 jump_to_find_result (view);
2727                 gtk_widget_queue_draw (GTK_WIDGET (view));
2728         }
2729 }
2730
2731 void
2732 ev_view_find_previous (EvView *view)
2733 {
2734         int n_results, n_pages;
2735         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2736         EvPageCache *page_cache;
2737
2738         page_cache = ev_page_cache_get (view->document);
2739
2740         n_results = ev_document_find_get_n_results (find, view->current_page);
2741
2742         n_pages = ev_page_cache_get_n_pages (page_cache);
2743
2744         view->find_result--;
2745
2746         if (view->find_result < 0) {
2747                 view->find_result = 0;
2748                 view->find_page--;
2749
2750                 if (view->find_page < 0) {
2751                         view->find_page = n_pages - 1;
2752                 }
2753
2754                 jump_to_find_page (view);
2755         } else {
2756                 jump_to_find_result (view);
2757                 gtk_widget_queue_draw (GTK_WIDGET (view));
2758         }
2759 }
2760
2761 /*** Selections ***/
2762
2763 /* compute_new_selection_rect/text calculates the area currently selected by
2764  * view_rect.  each handles a different mode;
2765  */
2766 static GList *
2767 compute_new_selection_rect (EvView       *view,
2768                             GdkPoint     *start,
2769                             GdkPoint     *stop)
2770 {
2771         GdkRectangle view_rect;
2772         int n_pages, i;
2773         GList *list = NULL;
2774
2775         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
2776
2777         view_rect.x = MIN (start->x, stop->x);
2778         view_rect.y = MIN (start->y, stop->y);
2779         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
2780         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
2781
2782         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2783
2784         for (i = 0; i < n_pages; i++) {
2785                 GdkRectangle page_area;
2786                 GtkBorder border;
2787
2788                 if (get_page_extents (view, i, &page_area, &border)) {
2789                         GdkRectangle overlap;
2790
2791                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
2792                                 EvViewSelection *selection;
2793
2794                                 selection = g_new0 (EvViewSelection, 1);
2795                                 selection->page = i;
2796                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2797                                                        &(selection->rect));
2798
2799                                 list = g_list_append (list, selection);
2800                         }
2801                 }
2802         }
2803
2804         return list;
2805 }
2806
2807 static gboolean
2808 gdk_rectangle_point_in (GdkRectangle *rectangle,
2809                         GdkPoint     *point)
2810 {
2811         return rectangle->x <= point->x &&
2812                 rectangle->y <= point->y &&
2813                 point->x < rectangle->x + rectangle->width &&
2814                 point->y < rectangle->y + rectangle->height;
2815 }
2816
2817 static GList *
2818 compute_new_selection_text (EvView   *view,
2819                             GdkPoint *start,
2820                             GdkPoint *stop)
2821 {
2822         int n_pages, i, first, last;
2823         GList *list = NULL;
2824         EvViewSelection *selection;
2825         gint width, height;
2826
2827         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
2828
2829         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2830
2831         /* First figure out the range of pages the selection
2832          * affects. */
2833         first = n_pages;
2834         last = 0;
2835         for (i = 0; i < n_pages; i++) {
2836                 GdkRectangle page_area;
2837                 GtkBorder border;
2838
2839                 get_page_extents (view, i, &page_area, &border);
2840                 if (gdk_rectangle_point_in (&page_area, start) ||
2841                     gdk_rectangle_point_in (&page_area, stop)) {
2842                         if (first == n_pages)
2843                                 first = i;
2844                         last = i;
2845                 }
2846
2847         }
2848
2849
2850
2851         /* Now create a list of EvViewSelection's for the affected
2852          * pages.  This could be an empty list, a list of just one
2853          * page or a number of pages.*/
2854         for (i = first; i < last + 1; i++) {
2855                 GdkRectangle page_area;
2856                 GtkBorder border;
2857                 GdkPoint *point;
2858
2859                 ev_page_cache_get_size (view->page_cache, i,
2860                                         1.0, &width, &height);
2861
2862                 selection = g_new0 (EvViewSelection, 1);
2863                 selection->page = i;
2864                 selection->rect.x1 = selection->rect.y1 = 0;
2865                 selection->rect.x2 = width;
2866                 selection->rect.y2 = height;
2867
2868                 get_page_extents (view, i, &page_area, &border);
2869
2870                 if (gdk_rectangle_point_in (&page_area, start))
2871                         point = start;
2872                 else
2873                         point = stop;
2874
2875                 if (i == first)
2876                         view_point_to_doc_point (view, point, &page_area,
2877                                                  &selection->rect.x1,
2878                                                  &selection->rect.y1);
2879
2880                 /* If the selection is contained within just one page,
2881                  * make sure we don't write 'start' into both points
2882                  * in selection->rect. */
2883                 if (first == last)
2884                         point = stop;
2885
2886                 if (i == last)
2887                         view_point_to_doc_point (view, point, &page_area,
2888                                                  &selection->rect.x2,
2889                                                  &selection->rect.y2);
2890
2891                 list = g_list_append (list, selection);
2892         }
2893
2894         return list;
2895 }
2896
2897 /* This function takes the newly calculated list, and figures out which regions
2898  * have changed.  It then queues a redraw approporiately.
2899  */
2900 static void
2901 merge_selection_region (EvView *view,
2902                         GList  *list)
2903 {
2904
2905         /* FIXME: actually write... */
2906         clear_selection (view);
2907         gtk_widget_queue_draw (GTK_WIDGET (view));
2908
2909         view->selection_info.selections = list;
2910         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, list);
2911 }
2912
2913 static void
2914 compute_selections (EvView   *view,
2915                     GdkPoint *start,
2916                     GdkPoint *stop)
2917 {
2918         GList *list;
2919
2920         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
2921                 list = compute_new_selection_rect (view, start, stop);
2922         else
2923                 list = compute_new_selection_text (view, start, stop);
2924         merge_selection_region (view, list);
2925 }
2926
2927 /* Free's the selection.  It's up to the caller to queue redraws if needed.
2928  */
2929 static void
2930 selection_free (EvViewSelection *selection)
2931 {
2932         g_free (selection);
2933 }
2934
2935 static void
2936 clear_selection (EvView *view)
2937 {
2938         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
2939         view->selection_info.selections = NULL;
2940         view->selection_info.in_selection = FALSE;
2941 }
2942
2943
2944 void
2945 ev_view_select_all (EvView *view)
2946 {
2947         int n_pages, i;
2948
2949         clear_selection (view);
2950
2951         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2952         for (i = 0; i < n_pages; i++) {
2953                 int width, height;
2954                 EvViewSelection *selection;
2955
2956                 ev_page_cache_get_size (view->page_cache,
2957                                         i, 1.0, &width, &height);
2958
2959                 selection = g_new0 (EvViewSelection, 1);
2960                 selection->page = i;
2961                 selection->rect.x1 = selection->rect.y1 = 0;
2962                 selection->rect.x2 = width;
2963                 selection->rect.y2 = height;
2964
2965                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
2966         }
2967
2968         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
2969         gtk_widget_queue_draw (GTK_WIDGET (view));
2970 }
2971
2972 static char *
2973 get_selected_text (EvView *ev_view)
2974 {
2975         GString *text;
2976         GList *l;
2977
2978         text = g_string_new (NULL);
2979
2980         ev_document_doc_mutex_lock ();
2981
2982         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
2983                 EvViewSelection *selection = (EvViewSelection *)l->data;
2984                 char *tmp;
2985
2986                 tmp = ev_document_get_text (ev_view->document,
2987                                             selection->page,
2988                                             &selection->rect);
2989                 g_string_append (text, tmp);
2990                 g_free (tmp);
2991         }
2992
2993         ev_document_doc_mutex_unlock ();
2994
2995         return g_string_free (text, FALSE);
2996 }
2997
2998 void
2999 ev_view_copy (EvView *ev_view)
3000 {
3001         GtkClipboard *clipboard;
3002         char *text;
3003
3004         if (!ev_document_can_get_text (ev_view->document)) {
3005                 return;
3006         }
3007
3008         text = get_selected_text (ev_view);
3009         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3010                                               GDK_SELECTION_CLIPBOARD);
3011         gtk_clipboard_set_text (clipboard, text, -1);
3012         g_free (text);
3013 }
3014
3015 static void
3016 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3017                         GtkSelectionData *selection_data,
3018                         guint             info,
3019                         gpointer          data)
3020 {
3021         EvView *ev_view = EV_VIEW (data);
3022         char *text;
3023
3024         if (!ev_document_can_get_text (ev_view->document)) {
3025                 return;
3026         }
3027
3028         text = get_selected_text (ev_view);
3029         gtk_selection_data_set_text (selection_data, text, -1);
3030         g_free (text);
3031 }
3032
3033 static void
3034 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3035                           gpointer      data)
3036 {
3037         EvView *view = EV_VIEW (data);
3038
3039         clear_selection (view);
3040 }
3041
3042 static void
3043 ev_view_update_primary_selection (EvView *ev_view)
3044 {
3045         GtkClipboard *clipboard;
3046
3047         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3048                                               GDK_SELECTION_PRIMARY);
3049
3050         if (ev_view->selection_info.selections) {
3051                 if (!gtk_clipboard_set_with_owner (clipboard,
3052                                                    targets,
3053                                                    G_N_ELEMENTS (targets),
3054                                                    ev_view_primary_get_cb,
3055                                                    ev_view_primary_clear_cb,
3056                                                    G_OBJECT (ev_view)))
3057                         ev_view_primary_clear_cb (clipboard, ev_view);
3058         } else {
3059                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3060                         gtk_clipboard_clear (clipboard);
3061         }
3062 }
3063
3064 /*** Cursor operations ***/
3065
3066 static GdkCursor *
3067 ev_view_create_invisible_cursor(void)
3068 {
3069        GdkBitmap *empty;
3070        GdkColor black = { 0, 0, 0, 0 };
3071        static char bits[] = { 0x00 };
3072
3073        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3074
3075        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3076 }
3077
3078 static void
3079 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3080 {
3081         GdkCursor *cursor = NULL;
3082         GdkDisplay *display;
3083         GtkWidget *widget;
3084
3085         if (view->cursor == new_cursor) {
3086                 return;
3087         }
3088
3089         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3090         display = gtk_widget_get_display (widget);
3091         view->cursor = new_cursor;
3092
3093         switch (new_cursor) {
3094                 case EV_VIEW_CURSOR_NORMAL:
3095                         gdk_window_set_cursor (widget->window, NULL);
3096                         break;
3097                 case EV_VIEW_CURSOR_IBEAM:
3098                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3099                         break;
3100                 case EV_VIEW_CURSOR_LINK:
3101                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3102                         break;
3103                 case EV_VIEW_CURSOR_WAIT:
3104                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3105                         break;
3106                 case EV_VIEW_CURSOR_HIDDEN:
3107                         cursor = ev_view_create_invisible_cursor ();
3108                         break;
3109                 case EV_VIEW_CURSOR_DRAG:
3110                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3111                         break;
3112         }
3113
3114         if (cursor) {
3115                 gdk_window_set_cursor (widget->window, cursor);
3116                 gdk_cursor_unref (cursor);
3117                 gdk_flush();
3118         }
3119 }
3120
3121 void
3122 ev_view_hide_cursor (EvView *view)
3123 {
3124        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3125 }
3126
3127 void
3128 ev_view_show_cursor (EvView *view)
3129 {
3130        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3131 }
3132
3133 /*** Enum description for usage in signal ***/
3134
3135 GType
3136 ev_sizing_mode_get_type (void)
3137 {
3138   static GType etype = 0;
3139   if (etype == 0) {
3140     static const GEnumValue values[] = {
3141       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3142       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3143       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3144       { 0, NULL, NULL }
3145     };
3146     etype = g_enum_register_static ("EvSizingMode", values);
3147   }
3148   return etype;
3149 }
3150