shell/ev-pixbuf-cache.c

   1 #include <config.h>
   2 #include "ev-pixbuf-cache.h"
   3 #include "ev-job-queue.h"
   4 #include "ev-page-cache.h"
   5 #include "ev-document-images.h"
   6 #include "ev-document-forms.h"
   7 #include "ev-image.h"
   8 #include "ev-form-field.h"
   9
  10 typedef struct _CacheJobInfo
  11 {
  12         EvJob *job;
  13         EvRenderContext *rc;
  14         gboolean page_ready;
  15
  16         /* Region of the page that needs to be drawn */
  17         GdkRegion *region;
  18
  19         /* Data we get from rendering */
  20         cairo_surface_t *surface;
  21         GList *link_mapping;
  22         GList *image_mapping;
  23         GList *form_field_mapping;
  24         GdkRegion *text_mapping;
  25
  26         /* Selection data.
  27          * Selection_points are the coordinates encapsulated in selection.
  28          * target_points is the target selection size. */
  29         EvRectangle      selection_points;
  30         EvRectangle      target_points;
  31         EvSelectionStyle selection_style;
  32         gboolean         points_set;
  33
  34         cairo_surface_t *selection;
  35         GdkRegion *selection_region;
  36 } CacheJobInfo;
  37
  38 struct _EvPixbufCache
  39 {
  40         GObject parent;
  41
  42         /* We keep a link to our containing view just for style information. */
  43         GtkWidget *view;
  44         EvDocument *document;
  45         int start_page;
  46         int end_page;
  47
  48         /* preload_cache_size is the number of pages prior to the current
  49          * visible area that we cache.  It's normally 1, but could be 2 in the
  50          * case of twin pages.
  51          */
  52         int preload_cache_size;
  53         CacheJobInfo *prev_job;
  54         CacheJobInfo *job_list;
  55         CacheJobInfo *next_job;
  56 };
  57
  58 struct _EvPixbufCacheClass
  59 {
  60         GObjectClass parent_class;
  61
  62         void (* job_finished) (EvPixbufCache *pixbuf_cache);
  63 };
  64
  65
  66 enum
  67 {
  68         JOB_FINISHED,
  69         N_SIGNALS,
  70 };
  71
  72 static guint signals[N_SIGNALS] = {0, };
  73
  74 static void          ev_pixbuf_cache_init       (EvPixbufCache      *pixbuf_cache);
  75 static void          ev_pixbuf_cache_class_init (EvPixbufCacheClass *pixbuf_cache);
  76 static void          ev_pixbuf_cache_finalize   (GObject            *object);
  77 static void          ev_pixbuf_cache_dispose    (GObject            *object);
  78 static void          job_page_ready_cb          (EvJob              *job,
  79                                                  EvPixbufCache      *pixbuf_cache);
  80 static void          job_finished_cb            (EvJob              *job,
  81                                                  EvPixbufCache      *pixbuf_cache);
  82 static CacheJobInfo *find_job_cache             (EvPixbufCache      *pixbuf_cache,
  83                                                  int                 page);
  84 static void          copy_job_to_job_info       (EvJobRender        *job_render,
  85                                                  CacheJobInfo       *job_info,
  86                                                  EvPixbufCache      *pixbuf_cache);
  87 static void          copy_job_page_and_selection_to_job_info (EvJobRender        *job_render,
  88                                                               CacheJobInfo       *job_info,
  89                                                               EvPixbufCache      *pixbuf_cache);
  90 static gboolean      new_selection_surface_needed(EvPixbufCache      *pixbuf_cache,
  91                                                   CacheJobInfo       *job_info,
  92                                                   gint                page,
  93                                                   gfloat              scale);
  94
  95
  96 /* These are used for iterating through the prev and next arrays */
  97 #define FIRST_VISABLE_PREV(pixbuf_cache) \
  98         (MAX (0, pixbuf_cache->preload_cache_size + 1 - pixbuf_cache->start_page))
  99 #define VISIBLE_NEXT_LEN(pixbuf_cache, page_cache) \
 100         (MIN(pixbuf_cache->preload_cache_size, ev_page_cache_get_n_pages (page_cache) - (1 + pixbuf_cache->end_page)))
 101 #define PAGE_CACHE_LEN(pixbuf_cache) \
 102         ((pixbuf_cache->end_page - pixbuf_cache->start_page) + 1)
 103
 104 G_DEFINE_TYPE (EvPixbufCache, ev_pixbuf_cache, G_TYPE_OBJECT)
 105
 106 static void
 107 ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache)
 108 {
 109         pixbuf_cache->start_page = 0;
 110         pixbuf_cache->end_page = 0;
 111         pixbuf_cache->job_list = g_new0 (CacheJobInfo, PAGE_CACHE_LEN (pixbuf_cache));
 112
 113         pixbuf_cache->preload_cache_size = 2;
 114         pixbuf_cache->prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 115         pixbuf_cache->next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 116 }
 117
 118 static void
 119 ev_pixbuf_cache_class_init (EvPixbufCacheClass *class)
 120 {
 121         GObjectClass *object_class;
 122
 123         object_class = G_OBJECT_CLASS (class);
 124
 125         object_class->finalize = ev_pixbuf_cache_finalize;
 126         object_class->dispose = ev_pixbuf_cache_dispose;
 127
 128         signals[JOB_FINISHED] =
 129                 g_signal_new ("job-finished",
 130                               G_OBJECT_CLASS_TYPE (object_class),
 131                               G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 132                               G_STRUCT_OFFSET (EvPixbufCacheClass, job_finished),
 133                               NULL, NULL,
 134                               g_cclosure_marshal_VOID__POINTER,
 135                               G_TYPE_NONE, 1,
 136                               G_TYPE_POINTER);
 137 }
 138
 139 static void
 140 ev_pixbuf_cache_finalize (GObject *object)
 141 {
 142         EvPixbufCache *pixbuf_cache;
 143
 144         pixbuf_cache = EV_PIXBUF_CACHE (object);
 145
 146         g_free (pixbuf_cache->prev_job);
 147         g_free (pixbuf_cache->job_list);
 148         g_free (pixbuf_cache->next_job);
 149
 150         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->finalize (object);
 151 }
 152
 153 static void
 154 dispose_cache_job_info (CacheJobInfo *job_info,
 155                         gpointer      data)
 156 {
 157         if (job_info == NULL)
 158                 return;
 159         if (job_info->job) {
 160                 g_signal_handlers_disconnect_by_func (job_info->job,
 161                                                       G_CALLBACK (job_page_ready_cb),
 162                                                       data);
 163                 g_signal_handlers_disconnect_by_func (job_info->job,
 164                                                       G_CALLBACK (job_finished_cb),
 165                                                       data);
 166                 ev_job_queue_remove_job (job_info->job);
 167                 g_object_unref (G_OBJECT (job_info->job));
 168                 job_info->job = NULL;
 169         }
 170         if (job_info->surface) {
 171                 cairo_surface_destroy (job_info->surface);
 172                 job_info->surface = NULL;
 173         }
 174         if (job_info->region) {
 175                 gdk_region_destroy (job_info->region);
 176                 job_info->region = NULL;
 177         }
 178         if (job_info->link_mapping) {
 179                 ev_link_mapping_free (job_info->link_mapping);
 180                 job_info->link_mapping = NULL;
 181         }
 182         if (job_info->image_mapping) {
 183                 ev_image_mapping_free (job_info->image_mapping);
 184                 job_info->image_mapping = NULL;
 185         }
 186         if (job_info->form_field_mapping) {
 187                 ev_form_field_mapping_free (job_info->form_field_mapping);
 188                 job_info->form_field_mapping = NULL;
 189         }
 190         if (job_info->text_mapping) {
 191                 gdk_region_destroy (job_info->text_mapping);
 192                 job_info->text_mapping = NULL;
 193         }
 194         if (job_info->selection) {
 195                 cairo_surface_destroy (job_info->selection);
 196                 job_info->selection = NULL;
 197         }
 198         if (job_info->selection_region) {
 199                 gdk_region_destroy (job_info->selection_region);
 200                 job_info->selection_region = NULL;
 201         }
 202         if (job_info->rc) {
 203                 g_object_unref (G_OBJECT (job_info->rc));
 204                 job_info->rc = NULL;
 205         }
 206
 207         job_info->points_set = FALSE;
 208 }
 209
 210 static void
 211 ev_pixbuf_cache_dispose (GObject *object)
 212 {
 213         EvPixbufCache *pixbuf_cache;
 214         int i;
 215
 216         pixbuf_cache = EV_PIXBUF_CACHE (object);
 217
 218         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 219                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 220                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 221         }
 222
 223         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 224                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 225         }
 226
 227         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->dispose (object);
 228 }
 229
 230
 231 EvPixbufCache *
 232 ev_pixbuf_cache_new (GtkWidget  *view,
 233                      EvDocument *document)
 234 {
 235         EvPixbufCache *pixbuf_cache;
 236
 237         pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
 238         /* This is a backlink, so we don't ref this */
 239         pixbuf_cache->view = view;
 240         pixbuf_cache->document = document;
 241
 242         return pixbuf_cache;
 243 }
 244
 245 static void
 246 job_page_ready_cb (EvJob         *job,
 247                    EvPixbufCache *pixbuf_cache)
 248 {
 249         CacheJobInfo *job_info;
 250         EvJobRender *job_render = EV_JOB_RENDER (job);
 251
 252         /* If the job is outside of our interest, we silently discard it */
 253         if ((job_render->rc->page->index < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 254             (job_render->rc->page->index > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
 255                 g_object_unref (job);
 256                 return;
 257         }
 258
 259         job_info = find_job_cache (pixbuf_cache, job_render->rc->page->index);
 260
 261         copy_job_page_and_selection_to_job_info (job_render, job_info, pixbuf_cache);
 262         g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 263 }
 264
 265 static void
 266 job_finished_cb (EvJob         *job,
 267                  EvPixbufCache *pixbuf_cache)
 268 {
 269         CacheJobInfo *job_info;
 270         EvJobRender *job_render = EV_JOB_RENDER (job);
 271
 272         /* If the job is outside of our interest, we silently discard it */
 273         if ((job_render->rc->page->index < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 274             (job_render->rc->page->index > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
 275                 g_object_unref (job);
 276                 return;
 277         }
 278
 279         job_info = find_job_cache (pixbuf_cache, job_render->rc->page->index);
 280         copy_job_to_job_info (job_render, job_info, pixbuf_cache);
 281 }
 282
 283 /* This checks a job to see if the job would generate the right sized pixbuf
 284  * given a scale.  If it won't, it removes the job and clears it to NULL.
 285  */
 286 static void
 287 check_job_size_and_unref (EvPixbufCache *pixbuf_cache,
 288                           CacheJobInfo *job_info,
 289                           EvPageCache  *page_cache,
 290                           gfloat        scale)
 291 {
 292         gint width;
 293         gint height;
 294
 295         g_assert (job_info);
 296
 297         if (job_info->job == NULL)
 298                 return;
 299
 300         ev_page_cache_get_size (page_cache,
 301                                 EV_JOB_RENDER (job_info->job)->rc->page->index,
 302                                 EV_JOB_RENDER (job_info->job)->rc->rotation,
 303                                 scale,
 304                                 &width, &height);
 305
 306         if (width == EV_JOB_RENDER (job_info->job)->target_width &&
 307             height == EV_JOB_RENDER (job_info->job)->target_height)
 308                 return;
 309
 310         g_signal_handlers_disconnect_by_func (job_info->job,
 311                                               G_CALLBACK (job_page_ready_cb),
 312                                               pixbuf_cache);
 313         g_signal_handlers_disconnect_by_func (job_info->job,
 314                                               G_CALLBACK (job_finished_cb),
 315                                               pixbuf_cache);
 316         ev_job_queue_remove_job (job_info->job);
 317         g_object_unref (job_info->job);
 318         job_info->job = NULL;
 319 }
 320
 321 /* Do all function that copies a job from an older cache to it's position in the
 322  * new cache.  It clears the old job if it doesn't have a place.
 323  */
 324 static void
 325 move_one_job (CacheJobInfo  *job_info,
 326               EvPixbufCache *pixbuf_cache,
 327               int            page,
 328               CacheJobInfo  *new_job_list,
 329               CacheJobInfo  *new_prev_job,
 330               CacheJobInfo  *new_next_job,
 331               int            start_page,
 332               int            end_page,
 333               EvJobPriority  priority)
 334 {
 335         CacheJobInfo *target_page = NULL;
 336         int page_offset;
 337         EvJobPriority new_priority;
 338
 339         if (page < (start_page - pixbuf_cache->preload_cache_size) ||
 340             page > (end_page + pixbuf_cache->preload_cache_size)) {
 341                 dispose_cache_job_info (job_info, pixbuf_cache);
 342                 return;
 343         }
 344
 345         /* find the target page to copy it over to. */
 346         if (page < start_page) {
 347                 page_offset = (page - (start_page - pixbuf_cache->preload_cache_size));
 348
 349                 g_assert (page_offset >= 0 &&
 350                           page_offset < pixbuf_cache->preload_cache_size);
 351                 target_page = new_prev_job + page_offset;
 352                 new_priority = EV_JOB_PRIORITY_LOW;
 353         } else if (page > end_page) {
 354                 page_offset = (page - (end_page + 1));
 355
 356                 g_assert (page_offset >= 0 &&
 357                           page_offset < pixbuf_cache->preload_cache_size);
 358                 target_page = new_next_job + page_offset;
 359                 new_priority = EV_JOB_PRIORITY_LOW;
 360         } else {
 361                 page_offset = page - start_page;
 362                 g_assert (page_offset >= 0 &&
 363                           page_offset <= ((end_page - start_page) + 1));
 364                 new_priority = EV_JOB_PRIORITY_HIGH;
 365                 target_page = new_job_list + page_offset;
 366         }
 367
 368         *target_page = *job_info;
 369         job_info->job = NULL;
 370         job_info->region = NULL;
 371         job_info->surface = NULL;
 372         job_info->link_mapping = NULL;
 373         job_info->image_mapping = NULL;
 374         job_info->form_field_mapping = NULL;
 375
 376         if (new_priority != priority && target_page->job) {
 377                 ev_job_queue_update_job (target_page->job, new_priority);
 378         }
 379 }
 380
 381 static void
 382 ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
 383                               gint           start_page,
 384                               gint           end_page)
 385 {
 386         CacheJobInfo *new_job_list;
 387         CacheJobInfo *new_prev_job;
 388         CacheJobInfo *new_next_job;
 389         EvPageCache *page_cache;
 390         int i, page;
 391
 392         if (pixbuf_cache->start_page == start_page &&
 393             pixbuf_cache->end_page == end_page)
 394                 return;
 395
 396         page_cache = ev_page_cache_get (pixbuf_cache->document);
 397
 398         new_job_list = g_new0 (CacheJobInfo, (end_page - start_page) + 1);
 399         new_prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 400         new_next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 401
 402         /* We go through each job in the old cache and either clear it or move
 403          * it to a new location. */
 404
 405         /* Start with the prev cache. */
 406         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 407         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 408                 if (page < 0) {
 409                         dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 410                 } else {
 411                         move_one_job (pixbuf_cache->prev_job + i,
 412                                       pixbuf_cache, page,
 413                                       new_job_list, new_prev_job, new_next_job,
 414                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 415                 }
 416                 page ++;
 417         }
 418
 419         page = pixbuf_cache->start_page;
 420         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 421                 move_one_job (pixbuf_cache->job_list + i,
 422                               pixbuf_cache, page,
 423                               new_job_list, new_prev_job, new_next_job,
 424                               start_page, end_page, EV_JOB_PRIORITY_HIGH);
 425                 page ++;
 426         }
 427
 428         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 429                 if (page >= ev_page_cache_get_n_pages (page_cache)) {
 430                         dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 431                 } else {
 432                         move_one_job (pixbuf_cache->next_job + i,
 433                                       pixbuf_cache, page,
 434                                       new_job_list, new_prev_job, new_next_job,
 435                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 436                 }
 437                 page ++;
 438         }
 439
 440         g_free (pixbuf_cache->job_list);
 441         g_free (pixbuf_cache->prev_job);
 442         g_free (pixbuf_cache->next_job);
 443
 444         pixbuf_cache->job_list = new_job_list;
 445         pixbuf_cache->prev_job = new_prev_job;
 446         pixbuf_cache->next_job = new_next_job;
 447
 448         pixbuf_cache->start_page = start_page;
 449         pixbuf_cache->end_page = end_page;
 450 }
 451
 452 static void
 453 copy_job_page_and_selection_to_job_info (EvJobRender   *job_render,
 454                                          CacheJobInfo  *job_info,
 455                                          EvPixbufCache *pixbuf_cache)
 456 {
 457         if (job_info->surface) {
 458                 cairo_surface_destroy (job_info->surface);
 459         }
 460         job_info->surface = cairo_surface_reference (job_render->surface);
 461
 462         if (job_info->rc) {
 463                 g_object_unref (G_OBJECT (job_info->rc));
 464         }
 465         job_info->rc = g_object_ref (job_render->rc);
 466
 467         job_info->points_set = FALSE;
 468         if (job_render->include_selection) {
 469                 if (job_info->selection) {
 470                         cairo_surface_destroy (job_info->selection);
 471                         job_info->selection = NULL;
 472                 }
 473                 if (job_info->selection_region) {
 474                         gdk_region_destroy (job_info->selection_region);
 475                         job_info->selection_region = NULL;
 476                 }
 477
 478                 job_info->selection_points = job_render->selection_points;
 479                 job_info->selection_region = gdk_region_copy (job_render->selection_region);
 480                 job_info->selection = cairo_surface_reference (job_render->selection);
 481                 g_assert (job_info->selection_points.x1 >= 0);
 482                 job_info->points_set = TRUE;
 483         }
 484
 485         if (job_info->job) {
 486                 g_signal_handlers_disconnect_by_func (job_info->job,
 487                                                       G_CALLBACK (job_page_ready_cb),
 488                                                       pixbuf_cache);
 489         }
 490
 491         job_info->page_ready = TRUE;
 492 }
 493
 494 static void
 495 copy_job_to_job_info (EvJobRender   *job_render,
 496                       CacheJobInfo  *job_info,
 497                       EvPixbufCache *pixbuf_cache)
 498 {
 499         if (job_render->include_links) {
 500                 if (job_info->link_mapping)
 501                         ev_link_mapping_free (job_info->link_mapping);
 502                 job_info->link_mapping = job_render->link_mapping;
 503         }
 504
 505         if (job_render->include_images) {
 506                 if (job_info->image_mapping)
 507                         ev_image_mapping_free (job_info->image_mapping);
 508                 job_info->image_mapping = job_render->image_mapping;
 509         }
 510
 511         if (job_render->include_forms) {
 512                 if (job_info->form_field_mapping)
 513                         ev_form_field_mapping_free (job_info->form_field_mapping);
 514                 job_info->form_field_mapping = job_render->form_field_mapping;
 515         }
 516
 517         if (job_render->include_text) {
 518                 if (job_info->text_mapping)
 519                         gdk_region_destroy (job_info->text_mapping);
 520                 job_info->text_mapping = job_render->text_mapping;
 521         }
 522
 523         if (job_info->job) {
 524                 g_signal_handlers_disconnect_by_func (job_info->job,
 525                                                       G_CALLBACK (job_finished_cb),
 526                                                       pixbuf_cache);
 527                 ev_job_queue_remove_job (job_info->job);
 528                 g_object_unref (G_OBJECT (job_info->job));
 529                 job_info->job = NULL;
 530         }
 531 }
 532
 533 static CacheJobInfo *
 534 find_job_cache (EvPixbufCache *pixbuf_cache,
 535                 int            page)
 536 {
 537         int page_offset;
 538
 539         if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
 540             page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
 541                 return NULL;
 542
 543         if (page < pixbuf_cache->start_page) {
 544                 page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
 545
 546                 g_assert (page_offset >= 0 &&
 547                           page_offset < pixbuf_cache->preload_cache_size);
 548                 return pixbuf_cache->prev_job + page_offset;
 549         }
 550
 551         if (page > pixbuf_cache->end_page) {
 552                 page_offset = (page - (pixbuf_cache->end_page + 1));
 553
 554                 g_assert (page_offset >= 0 &&
 555                           page_offset < pixbuf_cache->preload_cache_size);
 556                 return pixbuf_cache->next_job + page_offset;
 557         }
 558
 559         page_offset = page - pixbuf_cache->start_page;
 560         g_assert (page_offset >= 0 &&
 561                   page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
 562         return pixbuf_cache->job_list + page_offset;
 563 }
 564
 565 static void
 566 ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
 567                                  gfloat         scale)
 568 {
 569         EvPageCache *page_cache;
 570         int i;
 571
 572         page_cache = ev_page_cache_get (pixbuf_cache->document);
 573
 574         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 575                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, page_cache, scale);
 576         }
 577
 578         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 579                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, page_cache, scale);
 580                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, page_cache, scale);
 581         }
 582 }
 583
 584 #define FIRST_VISABLE_PREV(pixbuf_cache) \
 585         (MAX (0, pixbuf_cache->preload_cache_size + 1 - pixbuf_cache->start_page))
 586
 587 static void
 588 get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
 589 {
 590     if (GTK_WIDGET_HAS_FOCUS (widget)) {
 591         *text = &widget->style->text [GTK_STATE_SELECTED];
 592         *base = &widget->style->base [GTK_STATE_SELECTED];
 593     } else {
 594         *text = &widget->style->text [GTK_STATE_ACTIVE];
 595         *base = &widget->style->base [GTK_STATE_ACTIVE];
 596     }
 597 }
 598
 599 static void
 600 add_job (EvPixbufCache *pixbuf_cache,
 601          CacheJobInfo  *job_info,
 602          EvPageCache   *page_cache,
 603          GdkRegion     *region,
 604          gint           width,
 605          gint           height,
 606          gint           page,
 607          gint           rotation,
 608          gfloat         scale,
 609          EvJobPriority  priority)
 610 {
 611         EvPage  *ev_page;
 612         gboolean include_links = FALSE;
 613         gboolean include_text = FALSE;
 614         gboolean include_selection = FALSE;
 615         gboolean include_images = FALSE;
 616         gboolean include_forms = FALSE;
 617         GdkColor *text, *base;
 618
 619         job_info->page_ready = FALSE;
 620
 621         /* FIXME: we shouldn't lock here */
 622         ev_document_doc_mutex_lock ();
 623         ev_page = ev_document_get_page (pixbuf_cache->document, page);
 624         ev_document_doc_mutex_unlock ();
 625
 626         if (job_info->rc == NULL) {
 627                 job_info->rc = ev_render_context_new (ev_page, rotation, scale);
 628         } else {
 629                 ev_render_context_set_page (job_info->rc, ev_page);
 630                 ev_render_context_set_rotation (job_info->rc, rotation);
 631                 ev_render_context_set_scale (job_info->rc, scale);
 632         }
 633
 634         g_object_unref (ev_page);
 635
 636         if (job_info->region)
 637                 gdk_region_destroy (job_info->region);
 638         job_info->region = region ? gdk_region_copy (region) : NULL;
 639
 640         /* Figure out what else we need for this job */
 641         if (job_info->link_mapping == NULL)
 642                 include_links = TRUE;
 643         if (job_info->image_mapping == NULL)
 644                 include_images = TRUE;
 645         if (job_info->form_field_mapping == NULL)
 646                 include_forms = TRUE;
 647         if (job_info->text_mapping == NULL)
 648                 include_text = TRUE;
 649         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 650                 include_selection = TRUE;
 651         }
 652
 653         gtk_widget_ensure_style (pixbuf_cache->view);
 654
 655         get_selection_colors (pixbuf_cache->view, &text, &base);
 656
 657         job_info->job = ev_job_render_new (pixbuf_cache->document,
 658                                            job_info->rc,
 659                                            width, height,
 660                                            &(job_info->target_points),
 661                                            job_info->selection_style,
 662                                            text, base,
 663                                            include_forms,
 664                                            include_links,
 665                                            include_images,
 666                                            include_text,
 667                                            include_selection);
 668         ev_job_queue_add_job (job_info->job, priority);
 669         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 670                           G_CALLBACK (job_page_ready_cb),
 671                           pixbuf_cache);
 672         g_signal_connect (G_OBJECT (job_info->job), "finished",
 673                           G_CALLBACK (job_finished_cb),
 674                           pixbuf_cache);
 675 }
 676
 677 static void
 678 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 679                    CacheJobInfo  *job_info,
 680                    EvPageCache   *page_cache,
 681                    gint           page,
 682                    gint           rotation,
 683                    gfloat         scale,
 684                    EvJobPriority  priority)
 685 {
 686         gint width, height;
 687
 688         if (job_info->job)
 689                 return;
 690
 691         ev_page_cache_get_size (page_cache, page, rotation,
 692                                 scale, &width, &height);
 693
 694         if (job_info->surface &&
 695             cairo_image_surface_get_width (job_info->surface) == width &&
 696             cairo_image_surface_get_height (job_info->surface) == height)
 697                 return;
 698
 699         add_job (pixbuf_cache, job_info, page_cache, NULL,
 700                  width, height, page, rotation, scale,
 701                  priority);
 702 }
 703
 704 static void
 705 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 706                                     gint           rotation,
 707                                     gfloat         scale)
 708 {
 709         EvPageCache *page_cache;
 710         CacheJobInfo *job_info;
 711         int page;
 712         int i;
 713
 714         page_cache = ev_page_cache_get (pixbuf_cache->document);
 715
 716         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 717                 job_info = (pixbuf_cache->job_list + i);
 718                 page = pixbuf_cache->start_page + i;
 719
 720                 add_job_if_needed (pixbuf_cache, job_info,
 721                                    page_cache, page, rotation, scale,
 722                                    EV_JOB_PRIORITY_HIGH);
 723         }
 724
 725         for (i = FIRST_VISABLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 726                 job_info = (pixbuf_cache->prev_job + i);
 727                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 728
 729                 add_job_if_needed (pixbuf_cache, job_info,
 730                                    page_cache, page, rotation, scale,
 731                                    EV_JOB_PRIORITY_LOW);
 732         }
 733
 734         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 735                 job_info = (pixbuf_cache->next_job + i);
 736                 page = pixbuf_cache->end_page + 1 + i;
 737
 738                 add_job_if_needed (pixbuf_cache, job_info,
 739                                    page_cache, page, rotation, scale,
 740                                    EV_JOB_PRIORITY_LOW);
 741         }
 742
 743 }
 744
 745 void
 746 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 747                                 gint            start_page,
 748                                 gint            end_page,
 749                                 gint            rotation,
 750                                 gfloat          scale,
 751                                 GList          *selection_list)
 752 {
 753         EvPageCache *page_cache;
 754
 755         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 756
 757         page_cache = ev_page_cache_get (pixbuf_cache->document);
 758
 759         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 760         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 761         g_return_if_fail (end_page >= start_page);
 762
 763         /* First, resize the page_range as needed.  We cull old pages
 764          * mercilessly. */
 765         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 766
 767         /* Then, we update the current jobs to see if any of them are the wrong
 768          * size, we remove them if we need to. */
 769         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 770
 771         /* Next, we update the target selection for our pages */
 772         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 773
 774         /* Finally, we add the new jobs for all the sizes that don't have a
 775          * pixbuf */
 776         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 777 }
 778
 779 cairo_surface_t *
 780 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 781                              gint           page)
 782 {
 783         CacheJobInfo *job_info;
 784
 785         job_info = find_job_cache (pixbuf_cache, page);
 786         if (job_info == NULL)
 787                 return NULL;
 788
 789         if (job_info->page_ready)
 790                 return job_info->surface;
 791
 792         /* We don't need to wait for the idle to handle the callback */
 793         if (job_info->job &&
 794             EV_JOB_RENDER (job_info->job)->page_ready) {
 795                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 796                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 797         }
 798
 799         return job_info->surface;
 800 }
 801
 802 GList *
 803 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 804                                   gint           page)
 805 {
 806         CacheJobInfo *job_info;
 807
 808         job_info = find_job_cache (pixbuf_cache, page);
 809         if (job_info == NULL)
 810                 return NULL;
 811
 812         /* We don't need to wait for the idle to handle the callback */
 813         if (job_info->job &&
 814             EV_JOB (job_info->job)->finished) {
 815                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 816         }
 817
 818         return job_info->link_mapping;
 819 }
 820
 821 GList *
 822 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 823                                    gint           page)
 824 {
 825         CacheJobInfo *job_info;
 826
 827         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 828                 return NULL;
 829
 830         job_info = find_job_cache (pixbuf_cache, page);
 831         if (job_info == NULL)
 832                 return NULL;
 833
 834         /* We don't need to wait for the idle to handle the callback */
 835         if (job_info->job &&
 836             EV_JOB (job_info->job)->finished) {
 837                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 838         }
 839
 840         return job_info->image_mapping;
 841 }
 842
 843 GList *
 844 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 845                                         gint           page)
 846 {
 847         CacheJobInfo *job_info;
 848
 849         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 850                 return NULL;
 851
 852         job_info = find_job_cache (pixbuf_cache, page);
 853         if (job_info == NULL)
 854                 return NULL;
 855
 856         /* We don't need to wait for the idle to handle the callback */
 857         if (job_info->job &&
 858            EV_JOB (job_info->job)->finished) {
 859                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 860         }
 861
 862         return job_info->form_field_mapping;
 863 }
 864
 865 static gboolean
 866 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 867                              CacheJobInfo  *job_info,
 868                              gint           page,
 869                              gfloat         scale)
 870 {
 871         EvPageCache *page_cache;
 872
 873         if (job_info->selection) {
 874                 gint width, height;
 875                 gint selection_width, selection_height;
 876
 877                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 878                 ev_page_cache_get_size (page_cache, page,
 879                                         job_info->rc->rotation,
 880                                         scale, &width, &height);
 881
 882                 selection_width = cairo_image_surface_get_width (job_info->selection);
 883                 selection_height = cairo_image_surface_get_height (job_info->selection);
 884
 885                 if (width != selection_width || height != selection_height)
 886                         return TRUE;
 887         } else {
 888                 if (job_info->points_set)
 889                         return TRUE;
 890         }
 891
 892         return FALSE;
 893 }
 894
 895 static void
 896 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 897                            CacheJobInfo  *job_info,
 898                            gint           page,
 899                            gfloat         scale)
 900 {
 901         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 902                 if (job_info->selection)
 903                         cairo_surface_destroy (job_info->selection);
 904                 job_info->selection = NULL;
 905                 job_info->selection_points.x1 = -1;
 906         }
 907 }
 908
 909 GdkRegion *
 910 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 911                                   gint           page)
 912 {
 913         CacheJobInfo *job_info;
 914
 915         job_info = find_job_cache (pixbuf_cache, page);
 916         if (job_info == NULL)
 917                 return NULL;
 918
 919         /* We don't need to wait for the idle to handle the callback */
 920         if (job_info->job &&
 921             EV_JOB (job_info->job)->finished) {
 922                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 923         }
 924
 925         return job_info->text_mapping;
 926 }
 927
 928 /* Clears the cache of jobs and pixbufs.
 929  */
 930 void
 931 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 932 {
 933         int i;
 934
 935         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 936                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 937                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 938         }
 939
 940         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 941                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 942         }
 943 }
 944
 945
 946 void
 947 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 948 {
 949         gint i;
 950
 951         /* FIXME: doesn't update running jobs. */
 952         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 953                 CacheJobInfo *job_info;
 954
 955                 job_info = pixbuf_cache->prev_job + i;
 956                 if (job_info->selection) {
 957                         cairo_surface_destroy (job_info->selection);
 958                         job_info->selection = NULL;
 959                 }
 960
 961                 job_info = pixbuf_cache->next_job + i;
 962                 if (job_info->selection) {
 963                         cairo_surface_destroy (job_info->selection);
 964                         job_info->selection = NULL;
 965                 }
 966         }
 967
 968         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 969                 CacheJobInfo *job_info;
 970
 971                 job_info = pixbuf_cache->job_list + i;
 972                 if (job_info->selection) {
 973                         cairo_surface_destroy (job_info->selection);
 974                         job_info->selection = NULL;
 975                 }
 976         }
 977 }
 978
 979 cairo_surface_t *
 980 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 981                                        gint            page,
 982                                        gfloat          scale,
 983                                        GdkRegion     **region)
 984 {
 985         CacheJobInfo *job_info;
 986
 987         /* the document does not implement the selection interface */
 988         if (!EV_IS_SELECTION (pixbuf_cache->document))
 989                 return NULL;
 990
 991         job_info = find_job_cache (pixbuf_cache, page);
 992         if (job_info == NULL)
 993                 return NULL;
 994
 995         /* No selection on this page */
 996         if (!job_info->points_set)
 997                 return NULL;
 998
 999         /* Update the rc */
1000         g_assert (job_info->rc);
1001         ev_render_context_set_scale (job_info->rc, scale);
1002
1003         /* If we have a running job, we just return what we have under the
1004          * assumption that it'll be updated later and we can scale it as need
1005          * be */
1006         if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
1007                 return job_info->selection;
1008
1009         /* Now, lets see if we need to resize the image.  If we do, we clear the
1010          * old one. */
1011         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
1012
1013         /* Finally, we see if the two scales are the same, and get a new pixbuf
1014          * if needed.  We do this synchronously for now.  At some point, we
1015          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1016          * doesn't kill us.  Rendering a few glyphs should really be fast.
1017          */
1018         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1019                 EvRectangle *old_points;
1020                 GdkColor *text, *base;
1021
1022                 /* we need to get a new selection pixbuf */
1023                 ev_document_doc_mutex_lock ();
1024                 if (job_info->selection_points.x1 < 0) {
1025                         g_assert (job_info->selection == NULL);
1026                         old_points = NULL;
1027                 } else {
1028                         g_assert (job_info->selection != NULL);
1029                         old_points = &(job_info->selection_points);
1030                 }
1031
1032                 if (job_info->selection_region)
1033                         gdk_region_destroy (job_info->selection_region);
1034                 job_info->selection_region =
1035                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1036                                                            job_info->rc,
1037                                                            job_info->selection_style,
1038                                                            &(job_info->target_points));
1039
1040                 gtk_widget_ensure_style (pixbuf_cache->view);
1041
1042                 get_selection_colors (pixbuf_cache->view, &text, &base);
1043
1044                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1045                                                job_info->rc, &(job_info->selection),
1046                                                &(job_info->target_points),
1047                                                old_points,
1048                                                job_info->selection_style,
1049                                                text, base);
1050                 job_info->selection_points = job_info->target_points;
1051                 ev_document_doc_mutex_unlock ();
1052         }
1053         if (region)
1054                 *region = job_info->selection_region;
1055         return job_info->selection;
1056 }
1057
1058 static void
1059 update_job_selection (CacheJobInfo    *job_info,
1060                       EvViewSelection *selection)
1061 {
1062         job_info->points_set = TRUE;
1063         job_info->target_points = selection->rect;
1064         job_info->selection_style = selection->style;
1065 }
1066
1067 static void
1068 clear_job_selection (CacheJobInfo *job_info)
1069 {
1070         job_info->points_set = FALSE;
1071         job_info->selection_points.x1 = -1;
1072
1073         if (job_info->selection) {
1074                 cairo_surface_destroy (job_info->selection);
1075                 job_info->selection = NULL;
1076         }
1077 }
1078
1079 /* This function will reset the selection on pages that no longer have them, and
1080  * will update the target_selection on those that need it.  It will _not_ free
1081  * the previous selection_list -- that's up to caller to do.
1082  */
1083 void
1084 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1085                                     GList         *selection_list)
1086 {
1087         EvPageCache *page_cache;
1088         EvViewSelection *selection;
1089         GList *list = selection_list;
1090         int page;
1091         int i;
1092
1093         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1094
1095         if (!EV_IS_SELECTION (pixbuf_cache->document))
1096                 return;
1097
1098         page_cache = ev_page_cache_get (pixbuf_cache->document);
1099
1100         /* We check each area to see what needs updating, and what needs freeing; */
1101         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1102         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1103                 if (page < 0) {
1104                         page ++;
1105                         continue;
1106                 }
1107
1108                 selection = NULL;
1109                 while (list) {
1110                         if (((EvViewSelection *)list->data)->page == page) {
1111                                 selection = list->data;
1112                                 break;
1113                         } else if (((EvViewSelection *)list->data)->page > page)
1114                                 break;
1115                         list = list->next;
1116                 }
1117
1118                 if (selection)
1119                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1120                 else
1121                         clear_job_selection (pixbuf_cache->prev_job + i);
1122                 page ++;
1123         }
1124
1125         page = pixbuf_cache->start_page;
1126         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1127                 selection = NULL;
1128                 while (list) {
1129                         if (((EvViewSelection *)list->data)->page == page) {
1130                                 selection = list->data;
1131                                 break;
1132                         } else if (((EvViewSelection *)list->data)->page > page)
1133                                 break;
1134                         list = list->next;
1135                 }
1136
1137                 if (selection)
1138                         update_job_selection (pixbuf_cache->job_list + i, selection);
1139                 else
1140                         clear_job_selection (pixbuf_cache->job_list + i);
1141                 page ++;
1142         }
1143
1144         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1145                 if (page >= ev_page_cache_get_n_pages (page_cache))
1146                         break;
1147
1148                 selection = NULL;
1149                 while (list) {
1150                         if (((EvViewSelection *)list->data)->page == page) {
1151                                 selection = list->data;
1152                                 break;
1153                         } else if (((EvViewSelection *)list->data)->page > page)
1154                                 break;
1155                         list = list->next;
1156                 }
1157
1158                 if (selection)
1159                         update_job_selection (pixbuf_cache->next_job + i, selection);
1160                 else
1161                         clear_job_selection (pixbuf_cache->next_job + i);
1162                 page ++;
1163         }
1164 }
1165
1166
1167 /* Returns what the pixbuf cache thinks is */
1168
1169 GList *
1170 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1171 {
1172         EvPageCache *page_cache;
1173         EvViewSelection *selection;
1174         GList *retval = NULL;
1175         int page;
1176         int i;
1177
1178         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1179
1180         page_cache = ev_page_cache_get (pixbuf_cache->document);
1181
1182         /* We check each area to see what needs updating, and what needs freeing; */
1183         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1184         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1185                 if (page < 0) {
1186                         page ++;
1187                         continue;
1188                 }
1189
1190                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1191                         selection = g_new0 (EvViewSelection, 1);
1192                         selection->page = page;
1193                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1194                         if (pixbuf_cache->prev_job[i].selection_region)
1195                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1196                         retval = g_list_append (retval, selection);
1197                 }
1198
1199                 page ++;
1200         }
1201
1202         page = pixbuf_cache->start_page;
1203         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1204                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1205                         selection = g_new0 (EvViewSelection, 1);
1206                         selection->page = page;
1207                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1208                         if (pixbuf_cache->job_list[i].selection_region)
1209                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1210                         retval = g_list_append (retval, selection);
1211                 }
1212
1213                 page ++;
1214         }
1215
1216         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1217                 if (page >= ev_page_cache_get_n_pages (page_cache))
1218                         break;
1219
1220                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1221                         selection = g_new0 (EvViewSelection, 1);
1222                         selection->page = page;
1223                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1224                         if (pixbuf_cache->next_job[i].selection_region)
1225                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1226                         retval = g_list_append (retval, selection);
1227                 }
1228
1229                 page ++;
1230         }
1231
1232         return retval;
1233 }
1234
1235 void
1236 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1237                              GdkRegion     *region,
1238                              gint           page,
1239                              gint           rotation,
1240                              gdouble        scale)
1241 {
1242         CacheJobInfo *job_info;
1243         EvPageCache *page_cache;
1244         gint width, height;
1245
1246         job_info = find_job_cache (pixbuf_cache, page);
1247         if (job_info == NULL)
1248                 return;
1249
1250         page_cache = ev_page_cache_get (pixbuf_cache->document);
1251         ev_page_cache_get_size (page_cache, page, rotation, scale,
1252                                 &width, &height);
1253
1254         add_job (pixbuf_cache, job_info, page_cache, region,
1255                  width, height, page, rotation, scale,
1256                  EV_JOB_PRIORITY_HIGH);
1257 }
1258
1259