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         int rotation;
 153         double scale;
 154
 155         gboolean continuous;
 156         gboolean dual_page;
 157         gboolean fullscreen;
 158         gboolean presentation;
 159         EvSizingMode sizing_mode;
 160
 161         PendingScroll pending_scroll;
 162         gboolean pending_resize;
 163 };
 164
 165 struct _EvViewClass {
 166         GtkWidgetClass parent_class;
 167
 168         void    (*set_scroll_adjustments) (EvView         *view,
 169                                            GtkAdjustment  *hadjustment,
 170                                            GtkAdjustment  *vadjustment);
 171         void    (*binding_activated)      (EvView         *view,
 172                                            GtkScrollType   scroll,
 173                                            gboolean        horizontal);
 174         void    (*zoom_invalid)           (EvView         *view);
 175 };
 176
 177 /*** Scrolling ***/
 178 static void       scroll_to_current_page                     (EvView *view,
 179                                                               GtkOrientation orientation);
 180 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 181                                                               GtkAdjustment      *hadjustment,
 182                                                               GtkAdjustment      *vadjustment);
 183 static void       view_update_range_and_current_page         (EvView             *view);
 184 static void       set_scroll_adjustment                      (EvView             *view,
 185                                                               GtkOrientation      orientation,
 186                                                               GtkAdjustment      *adjustment);
 187 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 188                                                               GtkAdjustment      *hadjustment,
 189                                                               GtkAdjustment      *vadjustment);
 190 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 191                                                               guint               keyval,
 192                                                               GtkScrollType       scroll,
 193                                                               gboolean            horizontal);
 194 static void       ev_view_binding_activated                  (EvView             *view,
 195                                                               GtkScrollType       scroll,
 196                                                               gboolean            horizontal);
 197 static void       ensure_rectangle_is_visible                (EvView             *view,
 198                                                               GdkRectangle       *rect);
 199
 200 /*** Geometry computations ***/
 201 static void       compute_border                             (EvView             *view,
 202                                                               int                 width,
 203                                                               int                 height,
 204                                                               GtkBorder          *border);
 205 static void       get_page_y_offset                          (EvView *view,
 206                                                               int page,
 207                                                               double zoom,
 208                                                               int *y_offset);
 209 static gboolean   get_page_extents                           (EvView             *view,
 210                                                               gint                page,
 211                                                               GdkRectangle       *page_area,
 212                                                               GtkBorder          *border);
 213 static void       view_rect_to_doc_rect                      (EvView             *view,
 214                                                               GdkRectangle       *view_rect,
 215                                                               GdkRectangle       *page_area,
 216                                                               EvRectangle        *doc_rect);
 217 static void       doc_rect_to_view_rect                      (EvView             *view,
 218                                                               int                 page,
 219                                                               EvRectangle        *doc_rect,
 220                                                               GdkRectangle       *view_rect);
 221 static void       find_page_at_location                      (EvView             *view,
 222                                                               gdouble             x,
 223                                                               gdouble             y,
 224                                                               gint               *page,
 225                                                               gint               *x_offset,
 226                                                               gint               *y_offset);
 227
 228 /*** Hyperrefs ***/
 229 static EvLink*    get_link_at_location                       (EvView             *view,
 230                                                               gdouble             x,
 231                                                               gdouble             y);
 232 static void       go_to_link                                 (EvView             *view,
 233                                                               EvLink             *link);
 234 static char*      status_message_from_link                   (EvView             *view,
 235                                                               EvLink             *link);
 236
 237 /*** GtkWidget implementation ***/
 238 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 239                                                               GtkRequisition     *requisition);
 240 static void       ev_view_size_request_continuous            (EvView             *view,
 241                                                               GtkRequisition     *requisition);
 242 static void       ev_view_size_request_dual_page             (EvView             *view,
 243                                                               GtkRequisition     *requisition);
 244 static void       ev_view_size_request_single_page           (EvView             *view,
 245                                                               GtkRequisition     *requisition);
 246 static void       ev_view_size_request                       (GtkWidget          *widget,
 247                                                               GtkRequisition     *requisition);
 248 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 249                                                               GtkAllocation      *allocation);
 250 static void       ev_view_realize                            (GtkWidget          *widget);
 251 static void       ev_view_unrealize                          (GtkWidget          *widget);
 252 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 253                                                               GdkEventScroll     *event);
 254 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 255                                                               GdkEventExpose     *event);
 256 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 257                                                               GdkEventButton     *event);
 258 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 259                                                               GdkEventMotion     *event);
 260 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 261                                                               GdkEventButton     *event);
 262 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 263                                                               GdkEventCrossing   *event);
 264
 265 /*** Drawing ***/
 266 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 267 static void       draw_rubberband                            (GtkWidget          *widget,
 268                                                               GdkWindow          *window,
 269                                                               const GdkRectangle *rect,
 270                                                               guchar              alpha);
 271 static void       highlight_find_results                     (EvView             *view,
 272                                                               int                 page);
 273 static void       draw_one_page                              (EvView             *view,
 274                                                               gint                page,
 275                                                               GdkRectangle       *page_area,
 276                                                               GtkBorder          *border,
 277                                                               GdkRectangle       *expose_area);
 278
 279 /*** Callbacks ***/
 280 static void       find_changed_cb                            (EvDocument         *document,
 281                                                               int                 page,
 282                                                               EvView             *view);
 283 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 284                                                               EvView             *view);
 285 static void       page_changed_cb                            (EvPageCache        *page_cache,
 286                                                               int                 new_page,
 287                                                               EvView             *view);
 288 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 289                                                               EvView             *view);
 290
 291 /*** GObject ***/
 292 static void       ev_view_finalize                           (GObject            *object);
 293 static void       ev_view_destroy                            (GtkObject          *object);
 294 static void       ev_view_set_property                       (GObject            *object,
 295                                                               guint               prop_id,
 296                                                               const GValue       *value,
 297                                                               GParamSpec         *pspec);
 298 static void       ev_view_get_property                       (GObject            *object,
 299                                                               guint               prop_id,
 300                                                               GValue             *value,
 301                                                               GParamSpec         *pspec);
 302 static void       ev_view_class_init                         (EvViewClass        *class);
 303 static void       ev_view_init                               (EvView             *view);
 304
 305 /*** Zoom and sizing ***/
 306 static double   zoom_for_size_fit_width                      (int doc_width,
 307                                                               int doc_height,
 308                                                               int target_width,
 309                                                               int target_height,
 310                                                               int vsb_width);
 311 static double   zoom_for_size_best_fit                       (int doc_width,
 312                                                               int doc_height,
 313                                                               int target_width,
 314                                                               int target_height,
 315                                                               int vsb_width,
 316                                                               int hsb_width);
 317 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 318                                                               int     width,
 319                                                               int     height);
 320 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 321                                                                 int     width,
 322                                                                 int     height,
 323                                                                 int     vsb_width,
 324                                                                 int     hsb_height);
 325 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 326                                                                 int     width,
 327                                                                 int     height,
 328                                                                 int     vsb_width,
 329                                                                 int     hsb_height);
 330 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 331                                                                 int     width,
 332                                                                 int     height,
 333                                                                 int     vsb_width,
 334                                                                 int     hsb_height);
 335 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 336                                                                 int     width,
 337                                                                 int     height,
 338                                                                 int     vsb_width,
 339                                                                 int     hsb_height);
 340 /*** Cursors ***/
 341 static GdkCursor* ev_view_create_invisible_cursor            (void);
 342 static void       ev_view_set_cursor                         (EvView             *view,
 343                                                               EvViewCursor        new_cursor);
 344
 345 /*** Status messages ***/
 346 static void       ev_view_set_status                         (EvView             *view,
 347                                                               const char         *message);
 348 static void       update_find_status_message                 (EvView             *view);
 349 static void       ev_view_set_find_status                    (EvView             *view,
 350                                                               const char         *message);
 351 /*** Find ***/
 352 static void       jump_to_find_result                        (EvView             *view);
 353 static void       jump_to_find_page                          (EvView             *view);
 354
 355 /*** Selection ***/
 356 static void       compute_selections                         (EvView             *view,
 357                                                               GdkPoint           *start,
 358                                                               GdkPoint           *stop);
 359 static void       clear_selection                            (EvView             *view);
 360 static char*      get_selected_text                          (EvView             *ev_view);
 361 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 362                                                               GtkSelectionData   *selection_data,
 363                                                               guint               info,
 364                                                               gpointer            data);
 365 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 366                                                               gpointer            data);
 367 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 368
 369
 370 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 371
 372 static void
 373 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 374 {
 375         GdkRectangle page_area;
 376         GtkBorder border;
 377
 378         if (view->document == NULL) {
 379                 return;
 380         }
 381
 382         get_page_extents (view, view->current_page, &page_area, &border);
 383
 384         if (orientation == GTK_ORIENTATION_VERTICAL) {
 385                 if (view->continuous) {
 386                         gtk_adjustment_clamp_page (view->vadjustment,
 387                                                    page_area.y - view->spacing,
 388                                                    page_area.y + view->vadjustment->page_size);
 389                 } else {
 390                         gtk_adjustment_set_value (view->vadjustment,
 391                                                   view->vadjustment->lower);
 392                 }
 393         } else {
 394                 if (view->dual_page) {
 395                         gtk_adjustment_clamp_page (view->hadjustment,
 396                                                    page_area.x,
 397                                                    page_area.x + view->hadjustment->page_size);
 398                 } else {
 399                         gtk_adjustment_set_value (view->hadjustment,
 400                                                   CLAMP (view->hadjustment->value,
 401                                                   view->hadjustment->lower,
 402                                                   view->hadjustment->upper -
 403                                                   view->hadjustment->page_size));
 404                 }
 405         }
 406 }
 407
 408 static void
 409 view_set_adjustment_values (EvView         *view,
 410                             GtkOrientation  orientation)
 411 {
 412         GtkWidget *widget = GTK_WIDGET (view);
 413         GtkAdjustment *adjustment;
 414         int requisition;
 415         int allocation;
 416
 417         double factor;
 418         gint new_value;
 419
 420         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 421                 requisition = widget->requisition.width;
 422                 allocation = widget->allocation.width;
 423                 adjustment = view->hadjustment;
 424         } else {
 425                 requisition = widget->requisition.height;
 426                 allocation = widget->allocation.height;
 427                 adjustment = view->vadjustment;
 428         }
 429
 430         if (!adjustment)
 431                 return;
 432
 433         factor = 1.0;
 434         switch (view->pending_scroll) {
 435                 case SCROLL_TO_KEEP_POSITION:
 436                         factor = (adjustment->value) / adjustment->upper;
 437                         break;
 438                 case SCROLL_TO_CURRENT_PAGE:
 439                         break;
 440                 case SCROLL_TO_CENTER:
 441                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 442                         break;
 443         }
 444
 445         adjustment->page_size = allocation;
 446         adjustment->step_increment = allocation * 0.1;
 447         adjustment->page_increment = allocation * 0.9;
 448         adjustment->lower = 0;
 449         adjustment->upper = MAX (allocation, requisition);
 450
 451         /*
 452          * We add 0.5 to the values before to average out our rounding errors.
 453          */
 454         switch (view->pending_scroll) {
 455                 case SCROLL_TO_KEEP_POSITION:
 456                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 457                         gtk_adjustment_set_value (adjustment, (int)new_value);
 458                         break;
 459                 case SCROLL_TO_CURRENT_PAGE:
 460                         scroll_to_current_page (view, orientation);
 461                         break;
 462                 case SCROLL_TO_CENTER:
 463                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 464                                            0, adjustment->upper - adjustment->page_size);
 465                         gtk_adjustment_set_value (adjustment, (int)new_value);
 466                         break;
 467         }
 468
 469         gtk_adjustment_changed (adjustment);
 470 }
 471
 472 static void
 473 view_update_range_and_current_page (EvView *view)
 474 {
 475         /* Presentation trumps all other modes */
 476         if (view->presentation) {
 477                 view->start_page = view->current_page;
 478                 view->end_page = view->current_page;
 479         } else if (view->continuous) {
 480                 GdkRectangle current_area, unused, page_area;
 481                 GtkBorder border;
 482                 gint current_page;
 483                 gboolean found = FALSE;
 484                 int i;
 485
 486                 if (!(view->vadjustment && view->hadjustment))
 487                         return;
 488
 489                 current_area.x = view->hadjustment->value;
 490                 current_area.width = view->hadjustment->upper;
 491                 current_area.y = view->vadjustment->value;
 492                 current_area.height = view->vadjustment->page_size;
 493
 494                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 495
 496                         get_page_extents (view, i, &page_area, &border);
 497
 498                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 499                                 if (! found) {
 500                                         view->start_page = i;
 501                                         found = TRUE;
 502
 503                                 }
 504                                 view->end_page = i;
 505                         } else if (found) {
 506                                 break;
 507                         }
 508                 }
 509
 510                 current_page = ev_page_cache_get_current_page (view->page_cache);
 511
 512                 if (current_page < view->start_page || current_page > view->end_page) {
 513                         view->current_page = view->start_page;
 514                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 515                 }
 516         } else {
 517                 if (view->dual_page) {
 518                         if (view->current_page % 2 == 0) {
 519                                 view->start_page = view->current_page;
 520                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 521                                         view->end_page = view->start_page + 1;
 522                         } else {
 523                                 view->start_page = view->current_page - 1;
 524                                 view->end_page = view->current_page;
 525                         }
 526                 } else {
 527                         view->start_page = view->current_page;
 528                         view->end_page = view->current_page;
 529                 }
 530         }
 531
 532         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 533                                         view->start_page,
 534                                         view->end_page,
 535                                         view->rotation,
 536                                         view->scale,
 537                                         view->selection_info.selections);
 538 }
 539
 540 static void
 541 set_scroll_adjustment (EvView *view,
 542                        GtkOrientation  orientation,
 543                        GtkAdjustment  *adjustment)
 544 {
 545         GtkAdjustment **to_set;
 546
 547         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 548                 to_set = &view->hadjustment;
 549         else
 550                 to_set = &view->vadjustment;
 551
 552         if (*to_set != adjustment) {
 553                 if (*to_set) {
 554                         g_signal_handlers_disconnect_by_func (*to_set,
 555                                                               (gpointer) on_adjustment_value_changed,
 556                                                               view);
 557                         g_object_unref (*to_set);
 558                 }
 559
 560                 *to_set = adjustment;
 561                 view_set_adjustment_values (view, orientation);
 562
 563                 if (*to_set) {
 564                         g_object_ref (*to_set);
 565                         g_signal_connect (*to_set, "value_changed",
 566                                           G_CALLBACK (on_adjustment_value_changed), view);
 567                 }
 568         }
 569 }
 570
 571 static void
 572 ev_view_set_scroll_adjustments (EvView *view,
 573                                 GtkAdjustment  *hadjustment,
 574                                 GtkAdjustment  *vadjustment)
 575 {
 576         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 577         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 578
 579         on_adjustment_value_changed (NULL, view);
 580 }
 581
 582 static void
 583 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 584                            guint           keyval,
 585                            GtkScrollType   scroll,
 586                            gboolean        horizontal)
 587 {
 588   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 589
 590   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 591                                 "binding_activated", 2,
 592                                 GTK_TYPE_SCROLL_TYPE, scroll,
 593                                 G_TYPE_BOOLEAN, horizontal);
 594   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 595                                 "binding_activated", 2,
 596                                 GTK_TYPE_SCROLL_TYPE, scroll,
 597                                 G_TYPE_BOOLEAN, horizontal);
 598 }
 599
 600 void
 601 ev_view_scroll (EvView        *view,
 602                 EvScrollType   scroll)
 603 {
 604         GtkAdjustment *adjustment;
 605         double value, increment;
 606         gboolean first_page = FALSE;
 607         gboolean last_page = FALSE;
 608
 609         /* Assign values for increment and vertical adjustment */
 610         adjustment = view->vadjustment;
 611         increment = adjustment->page_size * 0.75;
 612         value = adjustment->value;
 613
 614         /* Assign boolean for first and last page */
 615         if (view->current_page == 0)
 616                 first_page = TRUE;
 617         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 618                 last_page = TRUE;
 619
 620         switch (scroll) {
 621                 case EV_SCROLL_PAGE_BACKWARD:
 622                         /* Do not jump backwards if at the first page */
 623                         if (value == (adjustment->lower) && first_page) {
 624                                 /* Do nothing */
 625                                 /* At the top of a page, assign the upper bound limit of previous page */
 626                         } else if (value == (adjustment->lower)) {
 627                                 value = adjustment->upper - adjustment->page_size;
 628                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 629                                 /* Jump to the top */
 630                         } else {
 631                                 value = MAX (value - increment, adjustment->lower);
 632                         }
 633                         break;
 634                 case EV_SCROLL_PAGE_FORWARD:
 635                         /* Do not jump forward if at the last page */
 636                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 637                                 /* Do nothing */
 638                         /* At the bottom of a page, assign the lower bound limit of next page */
 639                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 640                                 value = 0;
 641                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 642                         /* Jump to the bottom */
 643                         } else {
 644                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 645                         }
 646                         break;
 647                 default:
 648                         break;
 649         }
 650
 651         gtk_adjustment_set_value (adjustment, value);
 652 }
 653
 654 static void
 655 ev_view_binding_activated (EvView *view,
 656                            GtkScrollType scroll,
 657                            gboolean horizontal)
 658 {
 659         GtkAdjustment *adjustment;
 660         double value;
 661
 662         if (view->presentation) {
 663                 switch (scroll) {
 664                         case GTK_SCROLL_STEP_BACKWARD:
 665                                 ev_page_cache_prev_page (view->page_cache);
 666                                 break;
 667                         case GTK_SCROLL_STEP_FORWARD:
 668                                 ev_page_cache_next_page (view->page_cache);
 669                                 break;
 670                         default:
 671                                 break;
 672                 }
 673                 return;
 674         }
 675
 676         if (horizontal) {
 677                 adjustment = view->hadjustment;
 678         } else {
 679                 adjustment = view->vadjustment;
 680         }
 681
 682         value = adjustment->value;
 683
 684         switch (scroll) {
 685                 case GTK_SCROLL_STEP_BACKWARD:
 686                         value -= adjustment->step_increment;
 687                         break;
 688                 case GTK_SCROLL_STEP_FORWARD:
 689                         value += adjustment->step_increment;
 690                         break;
 691                 default:
 692                         break;
 693         }
 694
 695         value = CLAMP (value, adjustment->lower,
 696                        adjustment->upper - adjustment->page_size);
 697
 698         gtk_adjustment_set_value (adjustment, value);
 699 }
 700
 701 #define MARGIN 5
 702
 703 static void
 704 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 705 {
 706         GtkWidget *widget = GTK_WIDGET (view);
 707         GtkAdjustment *adjustment;
 708         int value;
 709
 710         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 711
 712         adjustment = view->vadjustment;
 713
 714         if (rect->y < adjustment->value) {
 715                 value = MAX (adjustment->lower, rect->y - MARGIN);
 716                 gtk_adjustment_set_value (view->vadjustment, value);
 717         } else if (rect->y + rect->height >
 718                    adjustment->value + widget->allocation.height) {
 719                 value = MIN (adjustment->upper, rect->y + rect->height -
 720                              widget->allocation.height + MARGIN);
 721                 gtk_adjustment_set_value (view->vadjustment, value);
 722         }
 723
 724         adjustment = view->hadjustment;
 725
 726         if (rect->x < adjustment->value) {
 727                 value = MAX (adjustment->lower, rect->x - MARGIN);
 728                 gtk_adjustment_set_value (view->hadjustment, value);
 729         } else if (rect->x + rect->height >
 730                    adjustment->value + widget->allocation.width) {
 731                 value = MIN (adjustment->upper, rect->x + rect->width -
 732                              widget->allocation.width + MARGIN);
 733                 gtk_adjustment_set_value (view->hadjustment, value);
 734         }
 735 }
 736
 737 /*** Geometry computations ***/
 738
 739 static void
 740 compute_border (EvView *view, int width, int height, GtkBorder *border)
 741 {
 742         if (view->presentation) {
 743                 border->left = 0;
 744                 border->right = 0;
 745                 border->top = 0;
 746                 border->bottom = 0;
 747         } else {
 748                 ev_document_misc_get_page_border_size (width, height, border);
 749         }
 750 }
 751
 752 static void
 753 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 754 {
 755         int max_width, offset;
 756         GtkBorder border;
 757
 758         g_return_if_fail (y_offset != NULL);
 759
 760         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 761
 762         compute_border (view, max_width, max_width, &border);
 763
 764         if (view->dual_page) {
 765                 ev_page_cache_get_height_to_page (view->page_cache, page,
 766                                                   view->rotation, zoom, NULL, &offset);
 767                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 768         } else {
 769                 ev_page_cache_get_height_to_page (view->page_cache, page,
 770                                                   view->rotation, zoom, &offset, NULL);
 771                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 772         }
 773
 774         *y_offset = offset;
 775         return;
 776 }
 777
 778 static gboolean
 779 get_page_extents (EvView       *view,
 780                   gint          page,
 781                   GdkRectangle *page_area,
 782                   GtkBorder    *border)
 783 {
 784         GtkWidget *widget;
 785         int width, height;
 786
 787         widget = GTK_WIDGET (view);
 788
 789         /* Get the size of the page */
 790         ev_page_cache_get_size (view->page_cache, page,
 791                                 view->rotation,
 792                                 view->scale,
 793                                 &width, &height);
 794         compute_border (view, width, height, border);
 795         page_area->width = width + border->left + border->right;
 796         page_area->height = height + border->top + border->bottom;
 797
 798         if (view->presentation) {
 799                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 800                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 801         } else if (view->continuous) {
 802                 gint max_width;
 803                 gint x, y;
 804
 805                 ev_page_cache_get_max_width (view->page_cache, view->scale,
 806                                              view->rotation, &max_width);
 807                 max_width = max_width + border->left + border->right;
 808                 /* Get the location of the bounding box */
 809                 if (view->dual_page) {
 810                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 811                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 812                         if (page % 2 == 0)
 813                                 x = x + (max_width - width - border->left - border->right);
 814                 } else {
 815                         x = view->spacing;
 816                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 817                 }
 818
 819                 get_page_y_offset (view, page, view->scale, &y);
 820
 821                 page_area->x = x;
 822                 page_area->y = y;
 823         } else {
 824                 gint x, y;
 825                 if (view->dual_page) {
 826                         gint width_2, height_2;
 827                         gint max_width = width;
 828                         gint max_height = height;
 829                         GtkBorder overall_border;
 830                         gint other_page;
 831
 832                         other_page = page ^ 1;
 833
 834                         /* First, we get the bounding box of the two pages */
 835                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 836                                 ev_page_cache_get_size (view->page_cache,
 837                                                         other_page,
 838                                                         view->rotation,
 839                                                         view->scale,
 840                                                         &width_2, &height_2);
 841                                 if (width_2 > width)
 842                                         max_width = width_2;
 843                                 if (height_2 > height)
 844                                         max_height = height_2;
 845                         }
 846                         compute_border (view, max_width, max_height, &overall_border);
 847
 848                         /* Find the offsets */
 849                         x = view->spacing;
 850                         y = view->spacing;
 851
 852                         /* Adjust for being the left or right page */
 853                         if (page % 2 == 0)
 854                                 x = x + max_width - width;
 855                         else
 856                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 857
 858                         y = y + (max_height - height)/2;
 859
 860                         /* Adjust for extra allocation */
 861                         x = x + MAX (0, widget->allocation.width -
 862                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 863                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 864                 } else {
 865                         x = view->spacing;
 866                         y = view->spacing;
 867
 868                         /* Adjust for extra allocation */
 869                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 870                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 871                 }
 872
 873                 page_area->x = x;
 874                 page_area->y = y;
 875         }
 876
 877         return TRUE;
 878 }
 879
 880 static void
 881 view_point_to_doc_point (EvView *view,
 882                          GdkPoint *view_point,
 883                          GdkRectangle *page_area,
 884                          double  *doc_point_x,
 885                          double  *doc_point_y)
 886 {
 887         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 888         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 889 }
 890
 891 static void
 892 view_rect_to_doc_rect (EvView *view,
 893                        GdkRectangle *view_rect,
 894                        GdkRectangle *page_area,
 895                        EvRectangle  *doc_rect)
 896 {
 897         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 898         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 899         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 900         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 901 }
 902
 903 static void
 904 doc_rect_to_view_rect (EvView       *view,
 905                        int           page,
 906                        EvRectangle  *doc_rect,
 907                        GdkRectangle *view_rect)
 908 {
 909         GdkRectangle page_area;
 910         GtkBorder border;
 911         double x, y, w, h;
 912         int width, height;
 913
 914         ev_page_cache_get_size (view->page_cache, page,
 915                                 view->rotation,
 916                                 1.0,
 917                                 &width, &height);
 918
 919         if (view->rotation == 0) {
 920                 x = doc_rect->x1;
 921                 y = doc_rect->y1;
 922                 w = doc_rect->x2 - doc_rect->x1;
 923                 h = doc_rect->y2 - doc_rect->y1;
 924         } else if (view->rotation == 90) {
 925                 x = width - doc_rect->y2;
 926                 y = doc_rect->x1;
 927                 w = doc_rect->y2 - doc_rect->y1;
 928                 h = doc_rect->x2 - doc_rect->x1;
 929         } else if (view->rotation == 180) {
 930                 x = width - doc_rect->x2;
 931                 y = height - doc_rect->y2;
 932                 w = doc_rect->x2 - doc_rect->x1;
 933                 h = doc_rect->y2 - doc_rect->y1;
 934         } else if (view->rotation == 270) {
 935                 x = doc_rect->y1;
 936                 y = height - doc_rect->x2;
 937                 w = doc_rect->y2 - doc_rect->y1;
 938                 h = doc_rect->x2 - doc_rect->x1;
 939         } else {
 940                 g_assert_not_reached ();
 941         }
 942
 943         get_page_extents (view, page, &page_area, &border);
 944
 945         view_rect->x = x * view->scale + page_area.x;
 946         view_rect->y = y * view->scale + page_area.y;
 947         view_rect->width = w * view->scale;
 948         view_rect->height = h * view->scale;
 949 }
 950
 951 static void
 952 find_page_at_location (EvView  *view,
 953                        gdouble  x,
 954                        gdouble  y,
 955                        gint    *page,
 956                        gint    *x_offset,
 957                        gint    *y_offset)
 958 {
 959         int i;
 960
 961         if (view->document == NULL)
 962                 return;
 963
 964         g_assert (page);
 965         g_assert (x_offset);
 966         g_assert (y_offset);
 967
 968         for (i = view->start_page; i <= view->end_page; i++) {
 969                 GdkRectangle page_area;
 970                 GtkBorder border;
 971
 972                 if (! get_page_extents (view, i, &page_area, &border))
 973                         continue;
 974
 975                 if ((x >= page_area.x + border.left) &&
 976                     (x < page_area.x + page_area.width - border.right) &&
 977                     (y >= page_area.y + border.top) &&
 978                     (y < page_area.y + page_area.height - border.bottom)) {
 979                         *page = i;
 980                         *x_offset = x - (page_area.x + border.left);
 981                         *y_offset = y - (page_area.y + border.top);
 982                         return;
 983                 }
 984         }
 985
 986         *page = -1;
 987 }
 988
 989 static gboolean
 990 location_in_text (EvView  *view,
 991                   gdouble  x,
 992                   gdouble  y)
 993 {
 994         GdkRegion *region;
 995         gint page = -1;
 996         gint x_offset = 0, y_offset = 0;
 997
 998         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 999
1000         if (page == -1)
1001                 return FALSE;
1002
1003         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1004
1005         if (region)
1006                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1007         else
1008                 return FALSE;
1009 }
1010
1011 /*** Hyperref ***/
1012 static EvLink *
1013 get_link_at_location (EvView  *view,
1014                       gdouble  x,
1015                       gdouble  y)
1016 {
1017         gint page = -1;
1018         gint x_offset = 0, y_offset = 0;
1019         GList *link_mapping;
1020
1021         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1022
1023         if (page == -1)
1024                 return NULL;
1025
1026         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1027
1028         if (link_mapping)
1029                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1030         else
1031                 return NULL;
1032 }
1033
1034 /* FIXME: standardize this sometime */
1035 static void
1036 go_to_link (EvView *view, EvLink *link)
1037 {
1038         EvLinkType type;
1039         const char *uri;
1040         int page;
1041
1042         type = ev_link_get_link_type (link);
1043
1044         switch (type) {
1045                 case EV_LINK_TYPE_TITLE:
1046                         break;
1047                 case EV_LINK_TYPE_PAGE:
1048                         page = ev_link_get_page (link);
1049                         ev_page_cache_set_current_page (view->page_cache, page);
1050                         break;
1051                 case EV_LINK_TYPE_EXTERNAL_URI:
1052                         uri = ev_link_get_uri (link);
1053                         gnome_vfs_url_show (uri);
1054                         break;
1055         }
1056 }
1057
1058 static char *
1059 status_message_from_link (EvView *view, EvLink *link)
1060 {
1061         EvLinkType type;
1062         char *msg = NULL;
1063         char *page_label;
1064
1065         type = ev_link_get_link_type (link);
1066
1067         switch (type) {
1068                 case EV_LINK_TYPE_TITLE:
1069                         if (ev_link_get_title (link))
1070                                 msg = g_strdup (ev_link_get_title (link));
1071                         break;
1072                 case EV_LINK_TYPE_PAGE:
1073                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1074                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1075                         g_free (page_label);
1076                         break;
1077                 case EV_LINK_TYPE_EXTERNAL_URI:
1078                         msg = g_strdup (ev_link_get_uri (link));
1079                         break;
1080                 default:
1081                         break;
1082         }
1083
1084         return msg;
1085 }
1086
1087
1088 /*** GtkWidget implementation ***/
1089
1090 static void
1091 ev_view_size_request_continuous_dual_page (EvView         *view,
1092                                            GtkRequisition *requisition)
1093 {
1094         int max_width;
1095         gint n_pages;
1096         GtkBorder border;
1097
1098         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1099                                      view->scale, &max_width);
1100         compute_border (view, max_width, max_width, &border);
1101
1102         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1103
1104         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1105         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1106
1107         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1108                 requisition->width = 1;
1109         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1110                 requisition->width = 1;
1111                 /* FIXME: This could actually be set on one page docs or docs
1112                  * with a strange aspect ratio. */
1113                 /* requisition->height = 1;*/
1114         }
1115 }
1116
1117 static void
1118 ev_view_size_request_continuous (EvView         *view,
1119                                  GtkRequisition *requisition)
1120 {
1121         int max_width;
1122         int n_pages;
1123         GtkBorder border;
1124
1125
1126         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1127                                      view->scale, &max_width);
1128         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1129         compute_border (view, max_width, max_width, &border);
1130
1131         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1132         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1133
1134         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1135                 requisition->width = 1;
1136         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1137                 requisition->width = 1;
1138                 /* FIXME: This could actually be set on one page docs or docs
1139                  * with a strange aspect ratio. */
1140                 /* requisition->height = 1;*/
1141         }
1142 }
1143
1144 static void
1145 ev_view_size_request_dual_page (EvView         *view,
1146                                 GtkRequisition *requisition)
1147 {
1148         GtkBorder border;
1149         gint width, height;
1150
1151         /* Find the largest of the two. */
1152         ev_page_cache_get_size (view->page_cache,
1153                                 view->current_page,
1154                                 view->rotation,
1155                                 view->scale,
1156                                 &width, &height);
1157         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1158                 gint width_2, height_2;
1159                 ev_page_cache_get_size (view->page_cache,
1160                                         view->current_page + 1,
1161                                         view->rotation,
1162                                         view->scale,
1163                                         &width_2, &height_2);
1164                 if (width_2 > width) {
1165                         width = width_2;
1166                         height = height_2;
1167                 }
1168         }
1169         compute_border (view, width, height, &border);
1170
1171         requisition->width = ((width + border.left + border.right) * 2) +
1172                 (view->spacing * 3);
1173         requisition->height = (height + border.top + border.bottom) +
1174                 (view->spacing * 2);
1175
1176         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1177                 requisition->width = 1;
1178         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1179                 requisition->width = 1;
1180                 requisition->height = 1;
1181         }
1182 }
1183
1184 static void
1185 ev_view_size_request_single_page (EvView         *view,
1186                                   GtkRequisition *requisition)
1187 {
1188         GtkBorder border;
1189         gint width, height;
1190
1191         ev_page_cache_get_size (view->page_cache,
1192                                 view->current_page,
1193                                 view->rotation,
1194                                 view->scale,
1195                                 &width, &height);
1196         compute_border (view, width, height, &border);
1197
1198         requisition->width = width + border.left + border.right + (2 * view->spacing);
1199         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1200
1201         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1202                 requisition->width = 1;
1203                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1204         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1205                 requisition->width = 1;
1206                 requisition->height = 1;
1207         }
1208 }
1209
1210 static void
1211 ev_view_size_request (GtkWidget      *widget,
1212                       GtkRequisition *requisition)
1213 {
1214         EvView *view = EV_VIEW (widget);
1215
1216         if (view->document == NULL) {
1217                 requisition->width = 1;
1218                 requisition->height = 1;
1219                 return;
1220         }
1221
1222         if (view->presentation) {
1223                 requisition->width = 1;
1224                 requisition->height = 1;
1225                 return;
1226         }
1227
1228         if (view->continuous && view->dual_page)
1229                 ev_view_size_request_continuous_dual_page (view, requisition);
1230         else if (view->continuous)
1231                 ev_view_size_request_continuous (view, requisition);
1232         else if (view->dual_page)
1233                 ev_view_size_request_dual_page (view, requisition);
1234         else
1235                 ev_view_size_request_single_page (view, requisition);
1236 }
1237
1238 static void
1239 ev_view_size_allocate (GtkWidget      *widget,
1240                        GtkAllocation  *allocation)
1241 {
1242         EvView *view = EV_VIEW (widget);
1243
1244         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1245                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1246
1247                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1248
1249                 ev_view_size_request (widget, &widget->requisition);
1250         }
1251
1252         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1253         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1254
1255         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1256         view->pending_resize = FALSE;
1257
1258         if (view->document)
1259                 view_update_range_and_current_page (view);
1260
1261         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1262 }
1263
1264 static void
1265 ev_view_realize (GtkWidget *widget)
1266 {
1267         EvView *view = EV_VIEW (widget);
1268         GdkWindowAttr attributes;
1269
1270         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1271
1272
1273         attributes.window_type = GDK_WINDOW_CHILD;
1274         attributes.wclass = GDK_INPUT_OUTPUT;
1275         attributes.visual = gtk_widget_get_visual (widget);
1276         attributes.colormap = gtk_widget_get_colormap (widget);
1277
1278         attributes.x = widget->allocation.x;
1279         attributes.y = widget->allocation.y;
1280         attributes.width = widget->allocation.width;
1281         attributes.height = widget->allocation.height;
1282         attributes.event_mask = GDK_EXPOSURE_MASK |
1283                                 GDK_BUTTON_PRESS_MASK |
1284                                 GDK_BUTTON_RELEASE_MASK |
1285                                 GDK_SCROLL_MASK |
1286                                 GDK_KEY_PRESS_MASK |
1287                                 GDK_POINTER_MOTION_MASK |
1288                                 GDK_LEAVE_NOTIFY_MASK;
1289
1290         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1291                                          &attributes,
1292                                          GDK_WA_X | GDK_WA_Y |
1293                                          GDK_WA_COLORMAP |
1294                                          GDK_WA_VISUAL);
1295         gdk_window_set_user_data (widget->window, widget);
1296         widget->style = gtk_style_attach (widget->style, widget->window);
1297
1298         if (view->presentation)
1299                 gdk_window_set_background (widget->window, &widget->style->black);
1300         else
1301                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1302 }
1303
1304 static void
1305 ev_view_unrealize (GtkWidget *widget)
1306 {
1307         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1308 }
1309
1310 static gboolean
1311 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1312 {
1313         EvView *view = EV_VIEW (widget);
1314
1315         if ((event->state & GDK_CONTROL_MASK) != 0) {
1316
1317                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1318
1319                  if (event->direction == GDK_SCROLL_UP ||
1320                         event->direction == GDK_SCROLL_LEFT) {
1321                             if (ev_view_can_zoom_in (view)) {
1322                                     ev_view_zoom_in (view);
1323                             }
1324                  } else {
1325                             if (ev_view_can_zoom_out (view)) {
1326                                     ev_view_zoom_out (view);
1327                             }
1328                  }
1329                  return TRUE;
1330         }
1331
1332         if ((event->state & GDK_SHIFT_MASK) != 0) {
1333                 if (event->direction == GDK_SCROLL_UP)
1334                         event->direction = GDK_SCROLL_LEFT;
1335                 if (event->direction == GDK_SCROLL_DOWN)
1336                         event->direction = GDK_SCROLL_RIGHT;
1337         }
1338
1339         return FALSE;
1340 }
1341
1342 static EvViewSelection *
1343 find_selection_for_page (EvView *view,
1344                          gint    page)
1345 {
1346         GList *list;
1347
1348         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1349                 EvViewSelection *selection;
1350
1351                 selection = (EvViewSelection *) list->data;
1352
1353                 if (selection->page == page)
1354                         return selection;
1355         }
1356
1357         return NULL;
1358 }
1359
1360 static gboolean
1361 ev_view_expose_event (GtkWidget      *widget,
1362                       GdkEventExpose *event)
1363 {
1364         EvView *view = EV_VIEW (widget);
1365         int i;
1366
1367         if (view->document == NULL)
1368                 return FALSE;
1369
1370         for (i = view->start_page; i <= view->end_page; i++) {
1371                 GdkRectangle page_area;
1372                 GtkBorder border;
1373
1374                 if (!get_page_extents (view, i, &page_area, &border))
1375                         continue;
1376
1377                 page_area.x -= view->scroll_x;
1378                 page_area.y -= view->scroll_y;
1379
1380                 draw_one_page (view, i, &page_area, &border, &(event->area));
1381
1382                 if (EV_IS_DOCUMENT_FIND (view->document))
1383                         highlight_find_results (view, i);
1384         }
1385
1386         return FALSE;
1387 }
1388
1389 static gboolean
1390 ev_view_button_press_event (GtkWidget      *widget,
1391                             GdkEventButton *event)
1392 {
1393         EvView *view = EV_VIEW (widget);
1394
1395         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1396                 gtk_widget_grab_focus (widget);
1397         }
1398
1399         view->pressed_button = event->button;
1400
1401         switch (event->button) {
1402                 case 1:
1403                         if (view->selection_info.selections) {
1404                                 clear_selection (view);
1405                                 gtk_widget_queue_draw (widget);
1406                         }
1407
1408                         view->selection_info.start.x = event->x + view->scroll_x;
1409                         view->selection_info.start.y = event->y + view->scroll_y;
1410                         return TRUE;
1411                 case 2:
1412                         /* use root coordinates as reference point because
1413                          * scrolling changes window relative coordinates */
1414                         view->drag_info.start.x = event->x_root;
1415                         view->drag_info.start.y = event->y_root;
1416                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1417                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1418
1419                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1420
1421                         return TRUE;
1422         }
1423
1424         return FALSE;
1425 }
1426
1427 static gboolean
1428 ev_view_motion_notify_event (GtkWidget      *widget,
1429                              GdkEventMotion *event)
1430 {
1431         EvView *view = EV_VIEW (widget);
1432
1433         if (!view->document)
1434                 return FALSE;
1435
1436         if (view->pressed_button == 1) {
1437                 GdkPoint point;
1438
1439                 view->selection_info.in_selection = TRUE;
1440                 point.x = event->x + view->scroll_x;
1441                 point.y = event->y + view->scroll_y;
1442                 compute_selections (view, &view->selection_info.start, &point);
1443
1444                 return TRUE;
1445         } else if (view->pressed_button == 2) {
1446                 if (!view->drag_info.in_drag) {
1447                         gboolean start;
1448
1449                         start = gtk_drag_check_threshold (widget,
1450                                                           view->drag_info.start.x,
1451                                                           view->drag_info.start.y,
1452                                                           event->x_root,
1453                                                           event->y_root);
1454                         view->drag_info.in_drag = start;
1455                 }
1456
1457                 if (view->drag_info.in_drag) {
1458                         int dx, dy;
1459                         gdouble dhadj_value, dvadj_value;
1460
1461                         dx = event->x_root - view->drag_info.start.x;
1462                         dy = event->y_root - view->drag_info.start.y;
1463
1464                         dhadj_value = view->hadjustment->page_size *
1465                                       (gdouble)dx / widget->allocation.width;
1466                         dvadj_value = view->vadjustment->page_size *
1467                                       (gdouble)dy / widget->allocation.height;
1468
1469                         /* clamp scrolling to visible area */
1470                         gtk_adjustment_set_value (view->hadjustment,
1471                                                   MIN(view->drag_info.hadj - dhadj_value,
1472                                                       view->hadjustment->upper -
1473                                                       view->hadjustment->page_size));
1474                         gtk_adjustment_set_value (view->vadjustment,
1475                                                   MIN(view->drag_info.vadj - dvadj_value,
1476                                                       view->vadjustment->upper -
1477                                                       view->vadjustment->page_size));
1478
1479                         return TRUE;
1480                 }
1481         } else if (view->pressed_button <= 0) {
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                         char *msg;
1487
1488                         msg = status_message_from_link (view, link);
1489                         ev_view_set_status (view, msg);
1490                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1491                         g_free (msg);
1492                 } else if (location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y)) {
1493                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1494                 } else {
1495                         ev_view_set_status (view, NULL);
1496                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1497                             view->cursor == EV_VIEW_CURSOR_IBEAM)
1498                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1499                 }
1500                 return TRUE;
1501         }
1502
1503         return FALSE;
1504 }
1505
1506 static gboolean
1507 ev_view_button_release_event (GtkWidget      *widget,
1508                               GdkEventButton *event)
1509 {
1510         EvView *view = EV_VIEW (widget);
1511
1512         if (view->pressed_button == 2) {
1513                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1514         }
1515
1516         view->pressed_button = -1;
1517         view->drag_info.in_drag = FALSE;
1518
1519         if (view->selection_info.selections) {
1520                 ev_view_update_primary_selection (view);
1521         } else if (view->document) {
1522                 EvLink *link;
1523
1524                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1525                 if (link) {
1526                         go_to_link (view, link);
1527                 }
1528         }
1529
1530         return FALSE;
1531 }
1532
1533 static gboolean
1534 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1535 {
1536         EvView *view = EV_VIEW (widget);
1537
1538         ev_view_set_status (view, NULL);
1539
1540         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1541             view->cursor == EV_VIEW_CURSOR_IBEAM)
1542                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1543
1544         return FALSE;
1545 }
1546
1547 /*** Drawing ***/
1548
1549 static guint32
1550 ev_gdk_color_to_rgb (const GdkColor *color)
1551 {
1552   guint32 result;
1553   result = (0xff0000 | (color->red & 0xff00));
1554   result <<= 8;
1555   result |= ((color->green & 0xff00) | (color->blue >> 8));
1556   return result;
1557 }
1558
1559 static void
1560 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1561                  const GdkRectangle *rect, guchar alpha)
1562 {
1563         GdkGC *gc;
1564         GdkPixbuf *pixbuf;
1565         GdkColor *fill_color_gdk;
1566         guint fill_color;
1567
1568         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1569         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1570
1571         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1572                                  rect->width, rect->height);
1573         gdk_pixbuf_fill (pixbuf, fill_color);
1574
1575         gdk_draw_pixbuf (window, NULL, pixbuf,
1576                          0, 0,
1577                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1578                          rect->width, rect->height,
1579                          GDK_RGB_DITHER_NONE,
1580                          0, 0);
1581
1582         g_object_unref (pixbuf);
1583
1584         gc = gdk_gc_new (window);
1585         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1586         gdk_draw_rectangle (window, gc, FALSE,
1587                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1588                             rect->width - 1,
1589                             rect->height - 1);
1590         g_object_unref (gc);
1591
1592         gdk_color_free (fill_color_gdk);
1593 }
1594
1595
1596 static void
1597 highlight_find_results (EvView *view, int page)
1598 {
1599         EvDocumentFind *find;
1600         int i, results = 0;
1601
1602         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1603
1604         find = EV_DOCUMENT_FIND (view->document);
1605
1606         results = ev_document_find_get_n_results (find, page);
1607
1608         for (i = 0; i < results; i++) {
1609                 EvRectangle rectangle;
1610                 GdkRectangle view_rectangle;
1611                 guchar alpha;
1612
1613                 if (i == view->find_result && page == view->find_page) {
1614                         alpha = 0x90;
1615                 } else {
1616                         alpha = 0x20;
1617                 }
1618
1619                 ev_document_find_get_result (find, page,
1620                                              i, &rectangle);
1621                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1622                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1623                                  &view_rectangle, alpha);
1624         }
1625 }
1626
1627 static void
1628 draw_one_page (EvView          *view,
1629                gint             page,
1630                GdkRectangle    *page_area,
1631                GtkBorder       *border,
1632                GdkRectangle    *expose_area)
1633 {
1634         gint width, height;
1635         GdkPixbuf *current_pixbuf;
1636         GdkRectangle overlap;
1637         GdkRectangle real_page_area;
1638         EvViewSelection *selection;
1639
1640         g_assert (view->document);
1641         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1642                 return;
1643
1644         selection = find_selection_for_page (view, page);
1645         ev_page_cache_get_size (view->page_cache,
1646                                 page, view->rotation,
1647                                 view->scale,
1648                                 &width, &height);
1649         /* Render the document itself */
1650         real_page_area = *page_area;
1651
1652         real_page_area.x += border->left;
1653         real_page_area.y += border->top;
1654         real_page_area.width -= (border->left + border->right);
1655         real_page_area.height -= (border->top + border->bottom);
1656
1657         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1658                                          GTK_WIDGET (view),
1659                                          page_area, border);
1660
1661         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1662                 GdkPixbuf *selection_pixbuf = NULL;
1663                 GdkPixbuf *scaled_image;
1664                 GdkPixbuf *scaled_selection;
1665
1666                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1667
1668                 /* Get the selection pixbuf iff we have something to draw */
1669                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
1670                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
1671                                                                                  page,
1672                                                                                  view->scale);
1673
1674                 if (current_pixbuf == NULL)
1675                         scaled_image = NULL;
1676                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1677                          height == gdk_pixbuf_get_height (current_pixbuf))
1678                         scaled_image = g_object_ref (current_pixbuf);
1679                 else
1680                         /* FIXME: We don't want to scale the whole area, just the right
1681                          * area of it */
1682                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1683                                                                 width, height,
1684                                                                 GDK_INTERP_NEAREST);
1685
1686                 if (selection_pixbuf == NULL)
1687                         scaled_selection = NULL;
1688                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
1689                          height == gdk_pixbuf_get_height (selection_pixbuf))
1690                         scaled_selection = g_object_ref (selection_pixbuf);
1691                 else
1692                         /* FIXME: We don't want to scale the whole area, just the right
1693                          * area of it */
1694                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
1695                                                                     width, height,
1696                                                                     GDK_INTERP_NEAREST);
1697
1698                 if (scaled_image) {
1699                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1700                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1701                                          scaled_image,
1702                                          overlap.x - real_page_area.x,
1703                                          overlap.y - real_page_area.y,
1704                                          overlap.x, overlap.y,
1705                                          overlap.width, overlap.height,
1706                                          GDK_RGB_DITHER_NORMAL,
1707                                          0, 0);
1708                         g_object_unref (scaled_image);
1709                 }
1710
1711                 if (scaled_selection) {
1712                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1713                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1714                                          scaled_selection,
1715                                          overlap.x - real_page_area.x,
1716                                          overlap.y - real_page_area.y,
1717                                          overlap.x, overlap.y,
1718                                          overlap.width, overlap.height,
1719                                          GDK_RGB_DITHER_NORMAL,
1720                                          0, 0);
1721                         g_object_unref (scaled_selection);
1722                 }
1723         }
1724 }
1725
1726 /*** GObject functions ***/
1727
1728 static void
1729 ev_view_finalize (GObject *object)
1730 {
1731         EvView *view = EV_VIEW (object);
1732
1733         LOG ("Finalize");
1734
1735         g_free (view->status);
1736         g_free (view->find_status);
1737
1738         clear_selection (view);
1739
1740         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1741 }
1742
1743 static void
1744 ev_view_destroy (GtkObject *object)
1745 {
1746         EvView *view = EV_VIEW (object);
1747
1748         if (view->document) {
1749                 g_object_unref (view->document);
1750                 view->document = NULL;
1751         }
1752         if (view->pixbuf_cache) {
1753                 g_object_unref (view->pixbuf_cache);
1754                 view->pixbuf_cache = NULL;
1755         }
1756         ev_view_set_scroll_adjustments (view, NULL, NULL);
1757
1758         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1759 }
1760
1761 static void
1762 ev_view_set_property (GObject      *object,
1763                       guint         prop_id,
1764                       const GValue *value,
1765                       GParamSpec   *pspec)
1766 {
1767         EvView *view = EV_VIEW (object);
1768
1769         switch (prop_id)
1770         {
1771         case PROP_CONTINUOUS:
1772                 ev_view_set_continuous (view, g_value_get_boolean (value));
1773                 break;
1774         case PROP_DUAL_PAGE:
1775                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1776                 break;
1777         case PROP_FULLSCREEN:
1778                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1779                 break;
1780         case PROP_PRESENTATION:
1781                 ev_view_set_presentation (view, g_value_get_boolean (value));
1782                 break;
1783         case PROP_SIZING_MODE:
1784                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1785                 break;
1786         case PROP_ZOOM:
1787                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1788                 break;
1789         default:
1790                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1791         }
1792 }
1793
1794 static void
1795 ev_view_get_property (GObject *object,
1796                       guint prop_id,
1797                       GValue *value,
1798                       GParamSpec *pspec)
1799 {
1800         EvView *view = EV_VIEW (object);
1801
1802         switch (prop_id)
1803         {
1804         case PROP_STATUS:
1805                 g_value_set_string (value, view->status);
1806                 break;
1807         case PROP_FIND_STATUS:
1808                 g_value_set_string (value, view->status);
1809                 break;
1810         case PROP_CONTINUOUS:
1811                 g_value_set_boolean (value, view->continuous);
1812                 break;
1813         case PROP_DUAL_PAGE:
1814                 g_value_set_boolean (value, view->dual_page);
1815                 break;
1816         case PROP_FULLSCREEN:
1817                 g_value_set_boolean (value, view->fullscreen);
1818                 break;
1819         case PROP_PRESENTATION:
1820                 g_value_set_boolean (value, view->presentation);
1821                 break;
1822         case PROP_SIZING_MODE:
1823                 g_value_set_enum (value, view->sizing_mode);
1824                 break;
1825         case PROP_ZOOM:
1826                 g_value_set_double (value, view->scale);
1827                 break;
1828         default:
1829                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1830         }
1831 }
1832
1833 static void
1834 ev_view_class_init (EvViewClass *class)
1835 {
1836         GObjectClass *object_class = G_OBJECT_CLASS (class);
1837         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1838         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1839         GtkBindingSet *binding_set;
1840
1841         object_class->finalize = ev_view_finalize;
1842         object_class->set_property = ev_view_set_property;
1843         object_class->get_property = ev_view_get_property;
1844
1845         widget_class->expose_event = ev_view_expose_event;
1846         widget_class->button_press_event = ev_view_button_press_event;
1847         widget_class->motion_notify_event = ev_view_motion_notify_event;
1848         widget_class->button_release_event = ev_view_button_release_event;
1849         widget_class->size_request = ev_view_size_request;
1850         widget_class->size_allocate = ev_view_size_allocate;
1851         widget_class->realize = ev_view_realize;
1852         widget_class->unrealize = ev_view_unrealize;
1853         widget_class->scroll_event = ev_view_scroll_event;
1854         widget_class->leave_notify_event = ev_view_leave_notify_event;
1855         gtk_object_class->destroy = ev_view_destroy;
1856
1857         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1858         class->binding_activated = ev_view_binding_activated;
1859
1860         widget_class->set_scroll_adjustments_signal =
1861             g_signal_new ("set-scroll-adjustments",
1862                           G_OBJECT_CLASS_TYPE (object_class),
1863                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1864                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1865                           NULL, NULL,
1866                           ev_marshal_VOID__OBJECT_OBJECT,
1867                           G_TYPE_NONE, 2,
1868                           GTK_TYPE_ADJUSTMENT,
1869                           GTK_TYPE_ADJUSTMENT);
1870
1871         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
1872                          G_TYPE_FROM_CLASS (object_class),
1873                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1874                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
1875                          NULL, NULL,
1876                          ev_marshal_VOID__ENUM_BOOLEAN,
1877                          G_TYPE_NONE, 2,
1878                          GTK_TYPE_SCROLL_TYPE,
1879                          G_TYPE_BOOLEAN);
1880
1881         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1882                          G_TYPE_FROM_CLASS (object_class),
1883                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1884                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1885                          NULL, NULL,
1886                          ev_marshal_VOID__VOID,
1887                          G_TYPE_NONE, 0, G_TYPE_NONE);
1888
1889         g_object_class_install_property (object_class,
1890                                          PROP_STATUS,
1891                                          g_param_spec_string ("status",
1892                                                               "Status Message",
1893                                                               "The status message",
1894                                                               NULL,
1895                                                               G_PARAM_READABLE));
1896
1897         g_object_class_install_property (object_class,
1898                                          PROP_FIND_STATUS,
1899                                          g_param_spec_string ("find-status",
1900                                                               "Find Status Message",
1901                                                               "The find status message",
1902                                                               NULL,
1903                                                               G_PARAM_READABLE));
1904
1905         g_object_class_install_property (object_class,
1906                                          PROP_CONTINUOUS,
1907                                          g_param_spec_boolean ("continuous",
1908                                                                "Continuous",
1909                                                                "Continuous scrolling mode",
1910                                                                TRUE,
1911                                                                G_PARAM_READWRITE));
1912
1913         g_object_class_install_property (object_class,
1914                                          PROP_DUAL_PAGE,
1915                                          g_param_spec_boolean ("dual-page",
1916                                                                "Dual Page",
1917                                                                "Two pages visible at once",
1918                                                                FALSE,
1919                                                                G_PARAM_READWRITE));
1920         g_object_class_install_property (object_class,
1921                                          PROP_FULLSCREEN,
1922                                          g_param_spec_boolean ("fullscreen",
1923                                                                "Full Screen",
1924                                                                "Draw page in a fullscreen fashion",
1925                                                                FALSE,
1926                                                                G_PARAM_READWRITE));
1927         g_object_class_install_property (object_class,
1928                                          PROP_PRESENTATION,
1929                                          g_param_spec_boolean ("presentation",
1930                                                                "Presentation",
1931                                                                "Draw page in presentation mode",
1932                                                                TRUE,
1933                                                                G_PARAM_READWRITE));
1934
1935         g_object_class_install_property (object_class,
1936                                          PROP_SIZING_MODE,
1937                                          g_param_spec_enum ("sizing-mode",
1938                                                             "Sizing Mode",
1939                                                             "Sizing Mode",
1940                                                             EV_TYPE_SIZING_MODE,
1941                                                             EV_SIZING_FIT_WIDTH,
1942                                                             G_PARAM_READWRITE));
1943
1944         g_object_class_install_property (object_class,
1945                                          PROP_ZOOM,
1946                                          g_param_spec_double ("zoom",
1947                                                               "Zoom factor",
1948                                                                "Zoom factor",
1949                                                                MIN_SCALE,
1950                                                                MAX_SCALE,
1951                                                                1.0,
1952                                                                G_PARAM_READWRITE));
1953
1954         binding_set = gtk_binding_set_by_class (class);
1955
1956         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1957         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1958         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1959         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1960 }
1961
1962 static void
1963 ev_view_init (EvView *view)
1964 {
1965         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1966
1967         view->spacing = 5;
1968         view->scale = 1.0;
1969         view->current_page = 0;
1970         view->pressed_button = -1;
1971         view->cursor = EV_VIEW_CURSOR_NORMAL;
1972         view->drag_info.in_drag = FALSE;
1973         view->selection_info.in_selection = FALSE;
1974
1975         view->selection_mode = EV_VIEW_SELECTION_TEXT;
1976         view->continuous = TRUE;
1977         view->dual_page = FALSE;
1978         view->presentation = FALSE;
1979         view->fullscreen = FALSE;
1980         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1981         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1982 }
1983
1984 /*** Callbacks ***/
1985
1986 static void
1987 find_changed_cb (EvDocument *document, int page, EvView *view)
1988 {
1989         jump_to_find_page (view);
1990         jump_to_find_result (view);
1991         update_find_status_message (view);
1992
1993         if (view->current_page == page)
1994                 gtk_widget_queue_draw (GTK_WIDGET (view));
1995 }
1996
1997 static void
1998 job_finished_cb (EvPixbufCache *pixbuf_cache,
1999                  EvView        *view)
2000 {
2001         gtk_widget_queue_draw (GTK_WIDGET (view));
2002 }
2003
2004 static void
2005 page_changed_cb (EvPageCache *page_cache,
2006                  int          new_page,
2007                  EvView      *view)
2008 {
2009         if (view->current_page != new_page) {
2010
2011                 view->current_page = new_page;
2012                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2013                 gtk_widget_queue_resize (GTK_WIDGET (view));
2014
2015                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2016                         view->find_page = new_page;
2017                         view->find_result = 0;
2018                         update_find_status_message (view);
2019                 }
2020         }
2021 }
2022
2023 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2024                                          EvView *view)
2025 {
2026         int dx = 0, dy = 0;
2027
2028         if (! GTK_WIDGET_REALIZED (view))
2029                 return;
2030
2031         if (view->hadjustment) {
2032                 dx = view->scroll_x - (int) view->hadjustment->value;
2033                 view->scroll_x = (int) view->hadjustment->value;
2034         } else {
2035                 view->scroll_x = 0;
2036         }
2037
2038         if (view->vadjustment) {
2039                 dy = view->scroll_y - (int) view->vadjustment->value;
2040                 view->scroll_y = (int) view->vadjustment->value;
2041         } else {
2042                 view->scroll_y = 0;
2043         }
2044
2045
2046         if (view->pending_resize)
2047                 gtk_widget_queue_draw (GTK_WIDGET (view));
2048         else
2049                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2050
2051
2052         if (view->document)
2053                 view_update_range_and_current_page (view);
2054 }
2055
2056 GtkWidget*
2057 ev_view_new (void)
2058 {
2059         GtkWidget *view;
2060
2061         view = g_object_new (EV_TYPE_VIEW, NULL);
2062
2063         return view;
2064 }
2065
2066 static void
2067 setup_caches (EvView *view)
2068 {
2069         view->page_cache = ev_page_cache_get (view->document);
2070         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2071         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
2072         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2073 }
2074
2075 static void
2076 clear_caches (EvView *view)
2077 {
2078         if (view->pixbuf_cache) {
2079                 g_object_unref (view->pixbuf_cache);
2080                 view->pixbuf_cache = NULL;
2081         }
2082
2083         if (view->page_cache) {
2084                 g_object_unref (view->page_cache);
2085                 view->page_cache = NULL;
2086         }
2087 }
2088
2089 void
2090 ev_view_set_document (EvView     *view,
2091                       EvDocument *document)
2092 {
2093         g_return_if_fail (EV_IS_VIEW (view));
2094
2095         if (document != view->document) {
2096                 clear_caches (view);
2097
2098                 if (view->document) {
2099                         g_signal_handlers_disconnect_by_func (view->document,
2100                                                               find_changed_cb,
2101                                                               view);
2102                         g_object_unref (view->document);
2103                         view->page_cache = NULL;
2104
2105                 }
2106
2107                 view->document = document;
2108                 view->find_page = 0;
2109                 view->find_result = 0;
2110
2111                 if (view->document) {
2112                         g_object_ref (view->document);
2113                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2114                                 g_signal_connect (view->document,
2115                                                   "find_changed",
2116                                                   G_CALLBACK (find_changed_cb),
2117                                                   view);
2118                         }
2119
2120                         setup_caches (view);
2121                 }
2122
2123                 gtk_widget_queue_resize (GTK_WIDGET (view));
2124         }
2125 }
2126
2127 /*** Zoom and sizing mode ***/
2128
2129 #define EPSILON 0.0000001
2130 void
2131 ev_view_set_zoom (EvView   *view,
2132                   double    factor,
2133                   gboolean  relative)
2134 {
2135         double scale;
2136
2137         if (relative)
2138                 scale = view->scale * factor;
2139         else
2140                 scale = factor;
2141
2142         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2143
2144         if (ABS (view->scale - scale) < EPSILON)
2145                 return;
2146
2147         view->scale = scale;
2148         view->pending_resize = TRUE;
2149
2150         gtk_widget_queue_resize (GTK_WIDGET (view));
2151
2152         g_object_notify (G_OBJECT (view), "zoom");
2153 }
2154
2155 double
2156 ev_view_get_zoom (EvView *view)
2157 {
2158         return view->scale;
2159 }
2160
2161 gboolean
2162 ev_view_get_continuous (EvView *view)
2163 {
2164         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2165
2166         return view->continuous;
2167 }
2168
2169 void
2170 ev_view_set_continuous (EvView   *view,
2171                         gboolean  continuous)
2172 {
2173         g_return_if_fail (EV_IS_VIEW (view));
2174
2175         continuous = continuous != FALSE;
2176
2177         if (view->continuous != continuous) {
2178                 view->continuous = continuous;
2179                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2180                 gtk_widget_queue_resize (GTK_WIDGET (view));
2181         }
2182
2183         g_object_notify (G_OBJECT (view), "continuous");
2184 }
2185
2186 gboolean
2187 ev_view_get_dual_page (EvView *view)
2188 {
2189         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2190
2191         return view->dual_page;
2192 }
2193
2194 void
2195 ev_view_set_dual_page (EvView   *view,
2196                        gboolean  dual_page)
2197 {
2198         g_return_if_fail (EV_IS_VIEW (view));
2199
2200         dual_page = dual_page != FALSE;
2201
2202         if (view->dual_page == dual_page)
2203                 return;
2204
2205         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2206         view->dual_page = dual_page;
2207         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2208          * preload_cache_size to be 2 if dual_page is set.
2209          */
2210         gtk_widget_queue_resize (GTK_WIDGET (view));
2211
2212         g_object_notify (G_OBJECT (view), "dual-page");
2213 }
2214
2215 void
2216 ev_view_set_fullscreen (EvView   *view,
2217                          gboolean  fullscreen)
2218 {
2219         g_return_if_fail (EV_IS_VIEW (view));
2220
2221         fullscreen = fullscreen != FALSE;
2222
2223         if (view->fullscreen == fullscreen)
2224                 return;
2225
2226         view->fullscreen = fullscreen;
2227         gtk_widget_queue_resize (GTK_WIDGET (view));
2228
2229         g_object_notify (G_OBJECT (view), "fullscreen");
2230 }
2231
2232 gboolean
2233 ev_view_get_fullscreen (EvView *view)
2234 {
2235         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2236
2237         return view->fullscreen;
2238 }
2239
2240 void
2241 ev_view_set_presentation (EvView   *view,
2242                           gboolean  presentation)
2243 {
2244         g_return_if_fail (EV_IS_VIEW (view));
2245
2246         presentation = presentation != FALSE;
2247
2248         if (view->presentation == presentation)
2249                 return;
2250
2251         view->presentation = presentation;
2252         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2253         gtk_widget_queue_resize (GTK_WIDGET (view));
2254
2255         if (GTK_WIDGET_REALIZED (view)) {
2256                 if (view->presentation)
2257                         gdk_window_set_background (GTK_WIDGET(view)->window,
2258                                                    &GTK_WIDGET (view)->style->black);
2259                 else
2260                         gdk_window_set_background (GTK_WIDGET(view)->window,
2261                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2262         }
2263
2264
2265         g_object_notify (G_OBJECT (view), "presentation");
2266 }
2267
2268 gboolean
2269 ev_view_get_presentation (EvView *view)
2270 {
2271         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2272
2273         return view->presentation;
2274 }
2275
2276 void
2277 ev_view_set_sizing_mode (EvView       *view,
2278                          EvSizingMode  sizing_mode)
2279 {
2280         g_return_if_fail (EV_IS_VIEW (view));
2281
2282         if (view->sizing_mode == sizing_mode)
2283                 return;
2284
2285         view->sizing_mode = sizing_mode;
2286         gtk_widget_queue_resize (GTK_WIDGET (view));
2287
2288         g_object_notify (G_OBJECT (view), "sizing-mode");
2289 }
2290
2291 EvSizingMode
2292 ev_view_get_sizing_mode (EvView *view)
2293 {
2294         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2295
2296         return view->sizing_mode;
2297 }
2298
2299 gboolean
2300 ev_view_can_zoom_in (EvView *view)
2301 {
2302         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2303 }
2304
2305 gboolean
2306 ev_view_can_zoom_out (EvView *view)
2307 {
2308         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2309 }
2310
2311 void
2312 ev_view_zoom_in (EvView *view)
2313 {
2314         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2315
2316         view->pending_scroll = SCROLL_TO_CENTER;
2317         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2318 }
2319
2320 void
2321 ev_view_zoom_out (EvView *view)
2322 {
2323         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2324
2325         view->pending_scroll = SCROLL_TO_CENTER;
2326         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2327 }
2328
2329 static void
2330 ev_view_set_rotation (EvView *view, int rotation)
2331 {
2332         view->rotation = rotation;
2333
2334         ev_pixbuf_cache_clear (view->pixbuf_cache);
2335         gtk_widget_queue_resize (GTK_WIDGET (view));
2336 }
2337
2338 void
2339 ev_view_rotate_right (EvView *view)
2340 {
2341         int rotation = view->rotation + 90;
2342
2343         if (rotation >= 360) {
2344                 rotation -= 360;
2345         }
2346
2347         ev_view_set_rotation (view, rotation);
2348 }
2349
2350 void
2351 ev_view_rotate_left (EvView *view)
2352 {
2353         int rotation = view->rotation - 90;
2354
2355         if (rotation < 0) {
2356                 rotation += 360;
2357         }
2358
2359         ev_view_set_rotation (view, rotation);
2360 }
2361
2362 static double
2363 zoom_for_size_fit_width (int doc_width,
2364                          int doc_height,
2365                          int target_width,
2366                          int target_height,
2367                          int vsb_width)
2368 {
2369         double scale;
2370
2371         scale = (double)target_width / doc_width;
2372
2373         if (doc_height * scale > target_height)
2374                 scale = (double) (target_width - vsb_width) / doc_width;
2375
2376         return scale;
2377 }
2378
2379 static double
2380 zoom_for_size_best_fit (int doc_width,
2381                         int doc_height,
2382                         int target_width,
2383                         int target_height,
2384                         int vsb_width,
2385                         int hsb_width)
2386 {
2387         double w_scale;
2388         double h_scale;
2389
2390         w_scale = (double)target_width / doc_width;
2391         h_scale = (double)target_height / doc_height;
2392
2393         if (doc_height * w_scale > target_height)
2394                 w_scale = (double) (target_width - vsb_width) / doc_width;
2395         if (doc_width * h_scale > target_width)
2396                 h_scale = (double) (target_height - hsb_width) / doc_height;
2397
2398         return MIN (w_scale, h_scale);
2399 }
2400
2401
2402 static void
2403 ev_view_zoom_for_size_presentation (EvView *view,
2404                                     int     width,
2405                                     int     height)
2406 {
2407         int doc_width, doc_height;
2408         gdouble scale;
2409
2410         ev_page_cache_get_size (view->page_cache,
2411                                 view->current_page,
2412                                 view->rotation,
2413                                 1.0,
2414                                 &doc_width,
2415                                 &doc_height);
2416         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2417         ev_view_set_zoom (view, scale, FALSE);
2418 }
2419
2420 static void
2421 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2422                            int     width,
2423                            int     height,
2424                            int     vsb_width,
2425                            int     hsb_height)
2426 {
2427         int doc_width, doc_height;
2428         GtkBorder border;
2429         gdouble scale;
2430
2431         ev_page_cache_get_max_width (view->page_cache,
2432                                      view->rotation,
2433                                      1.0,
2434                                      &doc_width);
2435         ev_page_cache_get_max_height (view->page_cache,
2436                                       view->rotation,
2437                                       1.0,
2438                                       &doc_height);
2439         compute_border (view, doc_width, doc_height, &border);
2440
2441         doc_width = doc_width * 2;
2442         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2443         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2444
2445         /* FIXME: We really need to calculate the overall height here, not the
2446          * page height.  We assume there's always a vertical scrollbar for
2447          * now.  We need to fix this. */
2448         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2449                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2450         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2451                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2452         else
2453                 g_assert_not_reached ();
2454
2455         ev_view_set_zoom (view, scale, FALSE);
2456 }
2457
2458 static void
2459 ev_view_zoom_for_size_continuous (EvView *view,
2460                                   int     width,
2461                                   int     height,
2462                                   int     vsb_width,
2463                                   int     hsb_height)
2464 {
2465         int doc_width, doc_height;
2466         GtkBorder border;
2467         gdouble scale;
2468
2469         ev_page_cache_get_max_width (view->page_cache,
2470                                      view->rotation,
2471                                      1.0,
2472                                      &doc_width);
2473         ev_page_cache_get_max_height (view->page_cache,
2474                                       view->rotation,
2475                                       1.0,
2476                                       &doc_height);
2477         compute_border (view, doc_width, doc_height, &border);
2478
2479         width -= (border.left + border.right + 2 * view->spacing);
2480         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2481
2482         /* FIXME: We really need to calculate the overall height here, not the
2483          * page height.  We assume there's always a vertical scrollbar for
2484          * now.  We need to fix this. */
2485         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2486                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2487         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2488                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2489         else
2490                 g_assert_not_reached ();
2491
2492         ev_view_set_zoom (view, scale, FALSE);
2493 }
2494
2495 static void
2496 ev_view_zoom_for_size_dual_page (EvView *view,
2497                                  int     width,
2498                                  int     height,
2499                                  int     vsb_width,
2500                                  int     hsb_height)
2501 {
2502         GtkBorder border;
2503         gint doc_width, doc_height;
2504         gdouble scale;
2505         gint other_page;
2506
2507         other_page = view->current_page ^ 1;
2508
2509         /* Find the largest of the two. */
2510         ev_page_cache_get_size (view->page_cache,
2511                                 view->current_page,
2512                                 view->rotation,
2513                                 1.0,
2514                                 &doc_width, &doc_height);
2515
2516         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2517                 gint width_2, height_2;
2518                 ev_page_cache_get_size (view->page_cache,
2519                                         other_page,
2520                                         view->rotation,
2521                                         1.0,
2522                                         &width_2, &height_2);
2523                 if (width_2 > doc_width)
2524                         doc_width = width_2;
2525                 if (height_2 > doc_height)
2526                         doc_height = height_2;
2527         }
2528         compute_border (view, doc_width, doc_height, &border);
2529
2530         doc_width = doc_width * 2;
2531         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2532         height -= (border.top + border.bottom + 2 * view->spacing);
2533
2534         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2535                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2536         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2537                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2538         else
2539                 g_assert_not_reached ();
2540
2541         ev_view_set_zoom (view, scale, FALSE);
2542 }
2543
2544 static void
2545 ev_view_zoom_for_size_single_page (EvView *view,
2546                                    int     width,
2547                                    int     height,
2548                                    int     vsb_width,
2549                                    int     hsb_height)
2550 {
2551         int doc_width, doc_height;
2552         GtkBorder border;
2553         gdouble scale;
2554
2555         ev_page_cache_get_size (view->page_cache,
2556                                 view->current_page,
2557                                 view->rotation,
2558                                 1.0,
2559                                 &doc_width,
2560                                 &doc_height);
2561         /* Get an approximate border */
2562         compute_border (view, width, height, &border);
2563
2564         width -= (border.left + border.right + 2 * view->spacing);
2565         height -= (border.top + border.bottom + 2 * view->spacing);
2566
2567         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2568                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2569         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2570                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2571         else
2572                 g_assert_not_reached ();
2573
2574         ev_view_set_zoom (view, scale, FALSE);
2575 }
2576
2577 void
2578 ev_view_set_zoom_for_size (EvView *view,
2579                            int     width,
2580                            int     height,
2581                            int     vsb_width,
2582                            int     hsb_height)
2583 {
2584         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2585                           view->sizing_mode == EV_SIZING_BEST_FIT);
2586         g_return_if_fail (width >= 0);
2587         g_return_if_fail (height >= 0);
2588
2589         if (view->document == NULL)
2590                 return;
2591
2592         if (view->presentation)
2593                 ev_view_zoom_for_size_presentation (view, width, height);
2594         else if (view->continuous && view->dual_page)
2595                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2596         else if (view->continuous)
2597                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2598         else if (view->dual_page)
2599                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2600         else
2601                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2602 }
2603
2604 /*** Status text messages ***/
2605
2606 const char *
2607 ev_view_get_status (EvView *view)
2608 {
2609         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2610
2611         return view->status;
2612 }
2613
2614 static void
2615 ev_view_set_status (EvView *view, const char *message)
2616 {
2617         g_return_if_fail (EV_IS_VIEW (view));
2618
2619         if (message != view->status) {
2620                 g_free (view->status);
2621                 view->status = g_strdup (message);
2622                 g_object_notify (G_OBJECT (view), "status");
2623         }
2624 }
2625
2626 static void
2627 update_find_status_message (EvView *view)
2628 {
2629         char *message;
2630
2631         if (view->current_page == view->find_page) {
2632                 int results;
2633
2634                 results = ev_document_find_get_n_results
2635                                 (EV_DOCUMENT_FIND (view->document),
2636                                  view->current_page);
2637                 /* TRANS: Sometimes this could be better translated as
2638                    "%d hit(s) on this page".  Therefore this string
2639                    contains plural cases. */
2640                 message = g_strdup_printf (ngettext ("%d found on this page",
2641                                                      "%d found on this page",
2642                                                      results),
2643                                            results);
2644         } else {
2645                 double percent;
2646
2647                 percent = ev_document_find_get_progress
2648                                 (EV_DOCUMENT_FIND (view->document));
2649                 if (percent >= (1.0 - 1e-10)) {
2650                         message = g_strdup (_("Not found"));
2651                 } else {
2652                         message = g_strdup_printf (_("%3d%% remaining to search"),
2653                                                    (int) ((1.0 - percent) * 100));
2654                 }
2655
2656         }
2657         ev_view_set_find_status (view, message);
2658         g_free (message);
2659 }
2660
2661 const char *
2662 ev_view_get_find_status (EvView *view)
2663 {
2664         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2665
2666         return view->find_status;
2667 }
2668
2669 static void
2670 ev_view_set_find_status (EvView *view, const char *message)
2671 {
2672         g_return_if_fail (EV_IS_VIEW (view));
2673
2674         g_free (view->find_status);
2675         view->find_status = g_strdup (message);
2676         g_object_notify (G_OBJECT (view), "find-status");
2677 }
2678
2679 /*** Find ***/
2680
2681 static void
2682 jump_to_find_result (EvView *view)
2683 {
2684         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2685         EvRectangle rect;
2686         GdkRectangle view_rect;
2687         int n_results;
2688         int page = view->find_page;
2689
2690         n_results = ev_document_find_get_n_results (find, page);
2691
2692         if (n_results > view->find_result) {
2693                 ev_document_find_get_result
2694                         (find, page, view->find_result, &rect);
2695
2696                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2697                 ensure_rectangle_is_visible (view, &view_rect);
2698         }
2699 }
2700
2701 static void
2702 jump_to_find_page (EvView *view)
2703 {
2704         int n_pages, i;
2705
2706         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2707
2708         for (i = 0; i < n_pages; i++) {
2709                 int has_results;
2710                 int page;
2711
2712                 page = i + view->find_page;
2713                 if (page >= n_pages) {
2714                         page = page - n_pages;
2715                 }
2716
2717                 has_results = ev_document_find_page_has_results
2718                                 (EV_DOCUMENT_FIND (view->document), page);
2719                 if (has_results == -1) {
2720                         view->find_page = page;
2721                         break;
2722                 } else if (has_results == 1) {
2723                         ev_page_cache_set_current_page (view->page_cache, page);
2724                         jump_to_find_result (view);
2725                         break;
2726                 }
2727         }
2728 }
2729
2730 gboolean
2731 ev_view_can_find_next (EvView *view)
2732 {
2733         int n_results = 0;
2734
2735         if (EV_IS_DOCUMENT_FIND (view->document)) {
2736                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2737
2738                 n_results = ev_document_find_get_n_results (find, view->current_page);
2739         }
2740
2741         return n_results > 0;
2742 }
2743
2744 void
2745 ev_view_find_next (EvView *view)
2746 {
2747         EvPageCache *page_cache;
2748         int n_results, n_pages;
2749         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2750
2751         page_cache = ev_page_cache_get (view->document);
2752         n_results = ev_document_find_get_n_results (find, view->current_page);
2753
2754         n_pages = ev_page_cache_get_n_pages (page_cache);
2755
2756         view->find_result++;
2757
2758         if (view->find_result >= n_results) {
2759                 view->find_result = 0;
2760                 view->find_page++;
2761
2762                 if (view->find_page >= n_pages) {
2763                         view->find_page = 0;
2764                 }
2765
2766                 jump_to_find_page (view);
2767         } else {
2768                 jump_to_find_result (view);
2769                 gtk_widget_queue_draw (GTK_WIDGET (view));
2770         }
2771 }
2772
2773 void
2774 ev_view_find_previous (EvView *view)
2775 {
2776         int n_results, n_pages;
2777         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2778         EvPageCache *page_cache;
2779
2780         page_cache = ev_page_cache_get (view->document);
2781
2782         n_results = ev_document_find_get_n_results (find, view->current_page);
2783
2784         n_pages = ev_page_cache_get_n_pages (page_cache);
2785
2786         view->find_result--;
2787
2788         if (view->find_result < 0) {
2789                 view->find_result = 0;
2790                 view->find_page--;
2791
2792                 if (view->find_page < 0) {
2793                         view->find_page = n_pages - 1;
2794                 }
2795
2796                 jump_to_find_page (view);
2797         } else {
2798                 jump_to_find_result (view);
2799                 gtk_widget_queue_draw (GTK_WIDGET (view));
2800         }
2801 }
2802
2803 /*** Selections ***/
2804
2805 /* compute_new_selection_rect/text calculates the area currently selected by
2806  * view_rect.  each handles a different mode;
2807  */
2808 static GList *
2809 compute_new_selection_rect (EvView       *view,
2810                             GdkPoint     *start,
2811                             GdkPoint     *stop)
2812 {
2813         GdkRectangle view_rect;
2814         int n_pages, i;
2815         GList *list = NULL;
2816
2817         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
2818
2819         view_rect.x = MIN (start->x, stop->x);
2820         view_rect.y = MIN (start->y, stop->y);
2821         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
2822         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
2823
2824         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2825
2826         for (i = 0; i < n_pages; i++) {
2827                 GdkRectangle page_area;
2828                 GtkBorder border;
2829
2830                 if (get_page_extents (view, i, &page_area, &border)) {
2831                         GdkRectangle overlap;
2832
2833                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
2834                                 EvViewSelection *selection;
2835
2836                                 selection = g_new0 (EvViewSelection, 1);
2837                                 selection->page = i;
2838                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2839                                                        &(selection->rect));
2840
2841                                 list = g_list_append (list, selection);
2842                         }
2843                 }
2844         }
2845
2846         return list;
2847 }
2848
2849 static gboolean
2850 gdk_rectangle_point_in (GdkRectangle *rectangle,
2851                         GdkPoint     *point)
2852 {
2853         return rectangle->x <= point->x &&
2854                 rectangle->y <= point->y &&
2855                 point->x < rectangle->x + rectangle->width &&
2856                 point->y < rectangle->y + rectangle->height;
2857 }
2858
2859 static GList *
2860 compute_new_selection_text (EvView   *view,
2861                             GdkPoint *start,
2862                             GdkPoint *stop)
2863 {
2864         int n_pages, i, first, last;
2865         GList *list = NULL;
2866         EvViewSelection *selection;
2867         gint width, height;
2868
2869         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
2870
2871         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2872
2873         /* First figure out the range of pages the selection
2874          * affects. */
2875         first = n_pages;
2876         last = 0;
2877         for (i = 0; i < n_pages; i++) {
2878                 GdkRectangle page_area;
2879                 GtkBorder border;
2880
2881                 get_page_extents (view, i, &page_area, &border);
2882                 if (gdk_rectangle_point_in (&page_area, start) ||
2883                     gdk_rectangle_point_in (&page_area, stop)) {
2884                         if (first == n_pages)
2885                                 first = i;
2886                         last = i;
2887                 }
2888
2889         }
2890
2891
2892
2893         /* Now create a list of EvViewSelection's for the affected
2894          * pages.  This could be an empty list, a list of just one
2895          * page or a number of pages.*/
2896         for (i = first; i < last + 1; i++) {
2897                 GdkRectangle page_area;
2898                 GtkBorder border;
2899                 GdkPoint *point;
2900
2901                 ev_page_cache_get_size (view->page_cache, i,
2902                                         view->rotation,
2903                                         1.0, &width, &height);
2904
2905                 selection = g_new0 (EvViewSelection, 1);
2906                 selection->page = i;
2907                 selection->rect.x1 = selection->rect.y1 = 0;
2908                 selection->rect.x2 = width;
2909                 selection->rect.y2 = height;
2910
2911                 get_page_extents (view, i, &page_area, &border);
2912
2913                 if (gdk_rectangle_point_in (&page_area, start))
2914                         point = start;
2915                 else
2916                         point = stop;
2917
2918                 if (i == first)
2919                         view_point_to_doc_point (view, point, &page_area,
2920                                                  &selection->rect.x1,
2921                                                  &selection->rect.y1);
2922
2923                 /* If the selection is contained within just one page,
2924                  * make sure we don't write 'start' into both points
2925                  * in selection->rect. */
2926                 if (first == last)
2927                         point = stop;
2928
2929                 if (i == last)
2930                         view_point_to_doc_point (view, point, &page_area,
2931                                                  &selection->rect.x2,
2932                                                  &selection->rect.y2);
2933
2934                 list = g_list_append (list, selection);
2935         }
2936
2937         return list;
2938 }
2939
2940 /* This function takes the newly calculated list, and figures out which regions
2941  * have changed.  It then queues a redraw approporiately.
2942  */
2943 static void
2944 merge_selection_region (EvView *view,
2945                         GList  *list)
2946 {
2947
2948         /* FIXME: actually write... */
2949         clear_selection (view);
2950         gtk_widget_queue_draw (GTK_WIDGET (view));
2951
2952         view->selection_info.selections = list;
2953         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, list);
2954 }
2955
2956 static void
2957 compute_selections (EvView   *view,
2958                     GdkPoint *start,
2959                     GdkPoint *stop)
2960 {
2961         GList *list;
2962
2963         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
2964                 list = compute_new_selection_rect (view, start, stop);
2965         else
2966                 list = compute_new_selection_text (view, start, stop);
2967         merge_selection_region (view, list);
2968 }
2969
2970 /* Free's the selection.  It's up to the caller to queue redraws if needed.
2971  */
2972 static void
2973 selection_free (EvViewSelection *selection)
2974 {
2975         g_free (selection);
2976 }
2977
2978 static void
2979 clear_selection (EvView *view)
2980 {
2981         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
2982         view->selection_info.selections = NULL;
2983         view->selection_info.in_selection = FALSE;
2984 }
2985
2986
2987 void
2988 ev_view_select_all (EvView *view)
2989 {
2990         int n_pages, i;
2991
2992         clear_selection (view);
2993
2994         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2995         for (i = 0; i < n_pages; i++) {
2996                 int width, height;
2997                 EvViewSelection *selection;
2998
2999                 ev_page_cache_get_size (view->page_cache,
3000                                         view->rotation,
3001                                         i, 1.0, &width, &height);
3002
3003                 selection = g_new0 (EvViewSelection, 1);
3004                 selection->page = i;
3005                 selection->rect.x1 = selection->rect.y1 = 0;
3006                 selection->rect.x2 = width;
3007                 selection->rect.y2 = height;
3008
3009                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3010         }
3011
3012         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3013         gtk_widget_queue_draw (GTK_WIDGET (view));
3014 }
3015
3016 static char *
3017 get_selected_text (EvView *ev_view)
3018 {
3019         GString *text;
3020         GList *l;
3021
3022         text = g_string_new (NULL);
3023
3024         ev_document_doc_mutex_lock ();
3025
3026         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3027                 EvViewSelection *selection = (EvViewSelection *)l->data;
3028                 char *tmp;
3029
3030                 tmp = ev_document_get_text (ev_view->document,
3031                                             selection->page,
3032                                             &selection->rect);
3033                 g_string_append (text, tmp);
3034                 g_free (tmp);
3035         }
3036
3037         ev_document_doc_mutex_unlock ();
3038
3039         return g_string_free (text, FALSE);
3040 }
3041
3042 void
3043 ev_view_copy (EvView *ev_view)
3044 {
3045         GtkClipboard *clipboard;
3046         char *text;
3047
3048         if (!ev_document_can_get_text (ev_view->document)) {
3049                 return;
3050         }
3051
3052         text = get_selected_text (ev_view);
3053         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3054                                               GDK_SELECTION_CLIPBOARD);
3055         gtk_clipboard_set_text (clipboard, text, -1);
3056         g_free (text);
3057 }
3058
3059 static void
3060 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3061                         GtkSelectionData *selection_data,
3062                         guint             info,
3063                         gpointer          data)
3064 {
3065         EvView *ev_view = EV_VIEW (data);
3066         char *text;
3067
3068         if (!ev_document_can_get_text (ev_view->document)) {
3069                 return;
3070         }
3071
3072         text = get_selected_text (ev_view);
3073         gtk_selection_data_set_text (selection_data, text, -1);
3074         g_free (text);
3075 }
3076
3077 static void
3078 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3079                           gpointer      data)
3080 {
3081         EvView *view = EV_VIEW (data);
3082
3083         clear_selection (view);
3084 }
3085
3086 static void
3087 ev_view_update_primary_selection (EvView *ev_view)
3088 {
3089         GtkClipboard *clipboard;
3090
3091         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3092                                               GDK_SELECTION_PRIMARY);
3093
3094         if (ev_view->selection_info.selections) {
3095                 if (!gtk_clipboard_set_with_owner (clipboard,
3096                                                    targets,
3097                                                    G_N_ELEMENTS (targets),
3098                                                    ev_view_primary_get_cb,
3099                                                    ev_view_primary_clear_cb,
3100                                                    G_OBJECT (ev_view)))
3101                         ev_view_primary_clear_cb (clipboard, ev_view);
3102         } else {
3103                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3104                         gtk_clipboard_clear (clipboard);
3105         }
3106 }
3107
3108 /*** Cursor operations ***/
3109
3110 static GdkCursor *
3111 ev_view_create_invisible_cursor(void)
3112 {
3113        GdkBitmap *empty;
3114        GdkColor black = { 0, 0, 0, 0 };
3115        static char bits[] = { 0x00 };
3116
3117        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3118
3119        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3120 }
3121
3122 static void
3123 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3124 {
3125         GdkCursor *cursor = NULL;
3126         GdkDisplay *display;
3127         GtkWidget *widget;
3128
3129         if (view->cursor == new_cursor) {
3130                 return;
3131         }
3132
3133         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3134         display = gtk_widget_get_display (widget);
3135         view->cursor = new_cursor;
3136
3137         switch (new_cursor) {
3138                 case EV_VIEW_CURSOR_NORMAL:
3139                         gdk_window_set_cursor (widget->window, NULL);
3140                         break;
3141                 case EV_VIEW_CURSOR_IBEAM:
3142                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3143                         break;
3144                 case EV_VIEW_CURSOR_LINK:
3145                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3146                         break;
3147                 case EV_VIEW_CURSOR_WAIT:
3148                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3149                         break;
3150                 case EV_VIEW_CURSOR_HIDDEN:
3151                         cursor = ev_view_create_invisible_cursor ();
3152                         break;
3153                 case EV_VIEW_CURSOR_DRAG:
3154                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3155                         break;
3156         }
3157
3158         if (cursor) {
3159                 gdk_window_set_cursor (widget->window, cursor);
3160                 gdk_cursor_unref (cursor);
3161                 gdk_flush();
3162         }
3163 }
3164
3165 void
3166 ev_view_hide_cursor (EvView *view)
3167 {
3168        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3169 }
3170
3171 void
3172 ev_view_show_cursor (EvView *view)
3173 {
3174        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3175 }
3176
3177 /*** Enum description for usage in signal ***/
3178
3179 GType
3180 ev_sizing_mode_get_type (void)
3181 {
3182   static GType etype = 0;
3183   if (etype == 0) {
3184     static const GEnumValue values[] = {
3185       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3186       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3187       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3188       { 0, NULL, NULL }
3189     };
3190     etype = g_enum_register_static ("EvSizingMode", values);
3191   }
3192   return etype;
3193 }
3194