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 < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 254             (job_render->rc->page > (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);
 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 < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 274             (job_render->rc->page > (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);
 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,
 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         gboolean include_links = FALSE;
 612         gboolean include_text = FALSE;
 613         gboolean include_selection = FALSE;
 614         gboolean include_images = TRUE;
 615         gboolean include_forms = FALSE;
 616         GdkColor *text, *base;
 617
 618         job_info->page_ready = FALSE;
 619
 620         if (job_info->rc == NULL) {
 621                 job_info->rc = ev_render_context_new (rotation, page, scale);
 622         } else {
 623                 ev_render_context_set_rotation (job_info->rc, rotation);
 624                 ev_render_context_set_page (job_info->rc, page);
 625                 ev_render_context_set_scale (job_info->rc, scale);
 626         }
 627
 628         if (job_info->region)
 629                 gdk_region_destroy (job_info->region);
 630         job_info->region = region ? gdk_region_copy (region) : NULL;
 631
 632         /* Figure out what else we need for this job */
 633         if (job_info->link_mapping == NULL)
 634                 include_links = TRUE;
 635         if (job_info->image_mapping == NULL)
 636                 include_images = TRUE;
 637         if (job_info->form_field_mapping == NULL)
 638                 include_forms = TRUE;
 639         if (job_info->text_mapping == NULL)
 640                 include_text = TRUE;
 641         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 642                 include_selection = TRUE;
 643         }
 644
 645         gtk_widget_ensure_style (pixbuf_cache->view);
 646
 647         get_selection_colors (pixbuf_cache->view, &text, &base);
 648
 649         job_info->job = ev_job_render_new (pixbuf_cache->document,
 650                                            job_info->rc,
 651                                            width, height,
 652                                            &(job_info->target_points),
 653                                            job_info->selection_style,
 654                                            text, base,
 655                                            include_forms,
 656                                            include_links,
 657                                            include_images,
 658                                            include_text,
 659                                            include_selection);
 660         ev_job_queue_add_job (job_info->job, priority);
 661         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 662                           G_CALLBACK (job_page_ready_cb),
 663                           pixbuf_cache);
 664         g_signal_connect (G_OBJECT (job_info->job), "finished",
 665                           G_CALLBACK (job_finished_cb),
 666                           pixbuf_cache);
 667 }
 668
 669 static void
 670 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 671                    CacheJobInfo  *job_info,
 672                    EvPageCache   *page_cache,
 673                    gint           page,
 674                    gint           rotation,
 675                    gfloat         scale,
 676                    EvJobPriority  priority)
 677 {
 678         gint width, height;
 679
 680         if (job_info->job)
 681                 return;
 682
 683         ev_page_cache_get_size (page_cache, page, rotation,
 684                                 scale, &width, &height);
 685
 686         if (job_info->surface &&
 687             cairo_image_surface_get_width (job_info->surface) == width &&
 688             cairo_image_surface_get_height (job_info->surface) == height)
 689                 return;
 690
 691         add_job (pixbuf_cache, job_info, page_cache, NULL,
 692                  width, height, page, rotation, scale,
 693                  priority);
 694 }
 695
 696 static void
 697 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 698                                     gint           rotation,
 699                                     gfloat         scale)
 700 {
 701         EvPageCache *page_cache;
 702         CacheJobInfo *job_info;
 703         int page;
 704         int i;
 705
 706         page_cache = ev_page_cache_get (pixbuf_cache->document);
 707
 708         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 709                 job_info = (pixbuf_cache->job_list + i);
 710                 page = pixbuf_cache->start_page + i;
 711
 712                 add_job_if_needed (pixbuf_cache, job_info,
 713                                    page_cache, page, rotation, scale,
 714                                    EV_JOB_PRIORITY_HIGH);
 715         }
 716
 717         for (i = FIRST_VISABLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 718                 job_info = (pixbuf_cache->prev_job + i);
 719                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 720
 721                 add_job_if_needed (pixbuf_cache, job_info,
 722                                    page_cache, page, rotation, scale,
 723                                    EV_JOB_PRIORITY_LOW);
 724         }
 725
 726         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 727                 job_info = (pixbuf_cache->next_job + i);
 728                 page = pixbuf_cache->end_page + 1 + i;
 729
 730                 add_job_if_needed (pixbuf_cache, job_info,
 731                                    page_cache, page, rotation, scale,
 732                                    EV_JOB_PRIORITY_LOW);
 733         }
 734
 735 }
 736
 737 void
 738 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 739                                 gint            start_page,
 740                                 gint            end_page,
 741                                 gint            rotation,
 742                                 gfloat          scale,
 743                                 GList          *selection_list)
 744 {
 745         EvPageCache *page_cache;
 746
 747         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 748
 749         page_cache = ev_page_cache_get (pixbuf_cache->document);
 750
 751         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 752         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 753         g_return_if_fail (end_page >= start_page);
 754
 755         /* First, resize the page_range as needed.  We cull old pages
 756          * mercilessly. */
 757         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 758
 759         /* Then, we update the current jobs to see if any of them are the wrong
 760          * size, we remove them if we need to. */
 761         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 762
 763         /* Next, we update the target selection for our pages */
 764         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 765
 766         /* Finally, we add the new jobs for all the sizes that don't have a
 767          * pixbuf */
 768         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 769 }
 770
 771 cairo_surface_t *
 772 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 773                              gint           page)
 774 {
 775         CacheJobInfo *job_info;
 776
 777         job_info = find_job_cache (pixbuf_cache, page);
 778         if (job_info == NULL)
 779                 return NULL;
 780
 781         if (job_info->page_ready)
 782                 return job_info->surface;
 783
 784         /* We don't need to wait for the idle to handle the callback */
 785         if (job_info->job &&
 786             EV_JOB_RENDER (job_info->job)->page_ready) {
 787                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 788                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 789         }
 790
 791         return job_info->surface;
 792 }
 793
 794 GList *
 795 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 796                                   gint           page)
 797 {
 798         CacheJobInfo *job_info;
 799
 800         job_info = find_job_cache (pixbuf_cache, page);
 801         if (job_info == NULL)
 802                 return NULL;
 803
 804         /* We don't need to wait for the idle to handle the callback */
 805         if (job_info->job &&
 806             EV_JOB (job_info->job)->finished) {
 807                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 808         }
 809
 810         return job_info->link_mapping;
 811 }
 812
 813 GList *
 814 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 815                                    gint           page)
 816 {
 817         CacheJobInfo *job_info;
 818
 819         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 820                 return NULL;
 821
 822         job_info = find_job_cache (pixbuf_cache, page);
 823         if (job_info == NULL)
 824                 return NULL;
 825
 826         /* We don't need to wait for the idle to handle the callback */
 827         if (job_info->job &&
 828             EV_JOB (job_info->job)->finished) {
 829                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 830         }
 831
 832         return job_info->image_mapping;
 833 }
 834
 835 GList *
 836 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 837                                         gint           page)
 838 {
 839         CacheJobInfo *job_info;
 840
 841         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 842                 return NULL;
 843
 844         job_info = find_job_cache (pixbuf_cache, page);
 845         if (job_info == NULL)
 846                 return NULL;
 847
 848         /* We don't need to wait for the idle to handle the callback */
 849         if (job_info->job &&
 850            EV_JOB (job_info->job)->finished) {
 851                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 852         }
 853
 854         return job_info->form_field_mapping;
 855 }
 856
 857 static gboolean
 858 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 859                              CacheJobInfo  *job_info,
 860                              gint           page,
 861                              gfloat         scale)
 862 {
 863         EvPageCache *page_cache;
 864
 865         if (job_info->selection) {
 866                 gint width, height;
 867                 gint selection_width, selection_height;
 868
 869                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 870                 ev_page_cache_get_size (page_cache, page,
 871                                         job_info->rc->rotation,
 872                                         scale, &width, &height);
 873
 874                 selection_width = cairo_image_surface_get_width (job_info->selection);
 875                 selection_height = cairo_image_surface_get_height (job_info->selection);
 876
 877                 if (width != selection_width || height != selection_height)
 878                         return TRUE;
 879         } else {
 880                 if (job_info->points_set)
 881                         return TRUE;
 882         }
 883
 884         return FALSE;
 885 }
 886
 887 static void
 888 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 889                            CacheJobInfo  *job_info,
 890                            gint           page,
 891                            gfloat         scale)
 892 {
 893         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 894                 if (job_info->selection)
 895                         cairo_surface_destroy (job_info->selection);
 896                 job_info->selection = NULL;
 897                 job_info->selection_points.x1 = -1;
 898         }
 899 }
 900
 901 GdkRegion *
 902 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 903                                   gint           page)
 904 {
 905         CacheJobInfo *job_info;
 906
 907         job_info = find_job_cache (pixbuf_cache, page);
 908         if (job_info == NULL)
 909                 return NULL;
 910
 911         /* We don't need to wait for the idle to handle the callback */
 912         if (job_info->job &&
 913             EV_JOB (job_info->job)->finished) {
 914                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 915         }
 916
 917         return job_info->text_mapping;
 918 }
 919
 920 /* Clears the cache of jobs and pixbufs.
 921  */
 922 void
 923 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 924 {
 925         int i;
 926
 927         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 928                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 929                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 930         }
 931
 932         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 933                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 934         }
 935 }
 936
 937
 938 void
 939 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 940 {
 941         gint i;
 942
 943         /* FIXME: doesn't update running jobs. */
 944         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 945                 CacheJobInfo *job_info;
 946
 947                 job_info = pixbuf_cache->prev_job + i;
 948                 if (job_info->selection) {
 949                         cairo_surface_destroy (job_info->selection);
 950                         job_info->selection = NULL;
 951                 }
 952
 953                 job_info = pixbuf_cache->next_job + i;
 954                 if (job_info->selection) {
 955                         cairo_surface_destroy (job_info->selection);
 956                         job_info->selection = NULL;
 957                 }
 958         }
 959
 960         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 961                 CacheJobInfo *job_info;
 962
 963                 job_info = pixbuf_cache->job_list + i;
 964                 if (job_info->selection) {
 965                         cairo_surface_destroy (job_info->selection);
 966                         job_info->selection = NULL;
 967                 }
 968         }
 969 }
 970
 971 cairo_surface_t *
 972 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 973                                        gint            page,
 974                                        gfloat          scale,
 975                                        GdkRegion     **region)
 976 {
 977         CacheJobInfo *job_info;
 978
 979         /* the document does not implement the selection interface */
 980         if (!EV_IS_SELECTION (pixbuf_cache->document))
 981                 return NULL;
 982
 983         job_info = find_job_cache (pixbuf_cache, page);
 984         if (job_info == NULL)
 985                 return NULL;
 986
 987         /* No selection on this page */
 988         if (!job_info->points_set)
 989                 return NULL;
 990
 991         /* Update the rc */
 992         g_assert (job_info->rc);
 993         ev_render_context_set_scale (job_info->rc, scale);
 994
 995         /* If we have a running job, we just return what we have under the
 996          * assumption that it'll be updated later and we can scale it as need
 997          * be */
 998         if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
 999                 return job_info->selection;
1000
1001         /* Now, lets see if we need to resize the image.  If we do, we clear the
1002          * old one. */
1003         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
1004
1005         /* Finally, we see if the two scales are the same, and get a new pixbuf
1006          * if needed.  We do this synchronously for now.  At some point, we
1007          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1008          * doesn't kill us.  Rendering a few glyphs should really be fast.
1009          */
1010         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1011                 EvRectangle *old_points;
1012                 GdkColor *text, *base;
1013
1014                 /* we need to get a new selection pixbuf */
1015                 ev_document_doc_mutex_lock ();
1016                 if (job_info->selection_points.x1 < 0) {
1017                         g_assert (job_info->selection == NULL);
1018                         old_points = NULL;
1019                 } else {
1020                         g_assert (job_info->selection != NULL);
1021                         old_points = &(job_info->selection_points);
1022                 }
1023
1024                 if (job_info->selection_region)
1025                         gdk_region_destroy (job_info->selection_region);
1026                 job_info->selection_region =
1027                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1028                                                            job_info->rc,
1029                                                            job_info->selection_style,
1030                                                            &(job_info->target_points));
1031
1032                 gtk_widget_ensure_style (pixbuf_cache->view);
1033
1034                 get_selection_colors (pixbuf_cache->view, &text, &base);
1035
1036                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1037                                                job_info->rc, &(job_info->selection),
1038                                                &(job_info->target_points),
1039                                                old_points,
1040                                                job_info->selection_style,
1041                                                text, base);
1042                 job_info->selection_points = job_info->target_points;
1043                 ev_document_doc_mutex_unlock ();
1044         }
1045         if (region)
1046                 *region = job_info->selection_region;
1047         return job_info->selection;
1048 }
1049
1050 static void
1051 update_job_selection (CacheJobInfo    *job_info,
1052                       EvViewSelection *selection)
1053 {
1054         job_info->points_set = TRUE;
1055         job_info->target_points = selection->rect;
1056         job_info->selection_style = selection->style;
1057 }
1058
1059 static void
1060 clear_job_selection (CacheJobInfo *job_info)
1061 {
1062         job_info->points_set = FALSE;
1063         job_info->selection_points.x1 = -1;
1064
1065         if (job_info->selection) {
1066                 cairo_surface_destroy (job_info->selection);
1067                 job_info->selection = NULL;
1068         }
1069 }
1070
1071 /* This function will reset the selection on pages that no longer have them, and
1072  * will update the target_selection on those that need it.  It will _not_ free
1073  * the previous selection_list -- that's up to caller to do.
1074  */
1075 void
1076 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1077                                     GList         *selection_list)
1078 {
1079         EvPageCache *page_cache;
1080         EvViewSelection *selection;
1081         GList *list = selection_list;
1082         int page;
1083         int i;
1084
1085         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1086
1087         if (!EV_IS_SELECTION (pixbuf_cache->document))
1088                 return;
1089
1090         page_cache = ev_page_cache_get (pixbuf_cache->document);
1091
1092         /* We check each area to see what needs updating, and what needs freeing; */
1093         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1094         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1095                 if (page < 0) {
1096                         page ++;
1097                         continue;
1098                 }
1099
1100                 selection = NULL;
1101                 while (list) {
1102                         if (((EvViewSelection *)list->data)->page == page) {
1103                                 selection = list->data;
1104                                 break;
1105                         } else if (((EvViewSelection *)list->data)->page > page)
1106                                 break;
1107                         list = list->next;
1108                 }
1109
1110                 if (selection)
1111                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1112                 else
1113                         clear_job_selection (pixbuf_cache->prev_job + i);
1114                 page ++;
1115         }
1116
1117         page = pixbuf_cache->start_page;
1118         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1119                 selection = NULL;
1120                 while (list) {
1121                         if (((EvViewSelection *)list->data)->page == page) {
1122                                 selection = list->data;
1123                                 break;
1124                         } else if (((EvViewSelection *)list->data)->page > page)
1125                                 break;
1126                         list = list->next;
1127                 }
1128
1129                 if (selection)
1130                         update_job_selection (pixbuf_cache->job_list + i, selection);
1131                 else
1132                         clear_job_selection (pixbuf_cache->job_list + i);
1133                 page ++;
1134         }
1135
1136         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1137                 if (page >= ev_page_cache_get_n_pages (page_cache))
1138                         break;
1139
1140                 selection = NULL;
1141                 while (list) {
1142                         if (((EvViewSelection *)list->data)->page == page) {
1143                                 selection = list->data;
1144                                 break;
1145                         } else if (((EvViewSelection *)list->data)->page > page)
1146                                 break;
1147                         list = list->next;
1148                 }
1149
1150                 if (selection)
1151                         update_job_selection (pixbuf_cache->next_job + i, selection);
1152                 else
1153                         clear_job_selection (pixbuf_cache->next_job + i);
1154                 page ++;
1155         }
1156 }
1157
1158
1159 /* Returns what the pixbuf cache thinks is */
1160
1161 GList *
1162 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1163 {
1164         EvPageCache *page_cache;
1165         EvViewSelection *selection;
1166         GList *retval = NULL;
1167         int page;
1168         int i;
1169
1170         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1171
1172         page_cache = ev_page_cache_get (pixbuf_cache->document);
1173
1174         /* We check each area to see what needs updating, and what needs freeing; */
1175         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1176         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1177                 if (page < 0) {
1178                         page ++;
1179                         continue;
1180                 }
1181
1182                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1183                         selection = g_new0 (EvViewSelection, 1);
1184                         selection->page = page;
1185                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1186                         if (pixbuf_cache->prev_job[i].selection_region)
1187                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1188                         retval = g_list_append (retval, selection);
1189                 }
1190
1191                 page ++;
1192         }
1193
1194         page = pixbuf_cache->start_page;
1195         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1196                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1197                         selection = g_new0 (EvViewSelection, 1);
1198                         selection->page = page;
1199                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1200                         if (pixbuf_cache->job_list[i].selection_region)
1201                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1202                         retval = g_list_append (retval, selection);
1203                 }
1204
1205                 page ++;
1206         }
1207
1208         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1209                 if (page >= ev_page_cache_get_n_pages (page_cache))
1210                         break;
1211
1212                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1213                         selection = g_new0 (EvViewSelection, 1);
1214                         selection->page = page;
1215                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1216                         if (pixbuf_cache->next_job[i].selection_region)
1217                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1218                         retval = g_list_append (retval, selection);
1219                 }
1220
1221                 page ++;
1222         }
1223
1224         return retval;
1225 }
1226
1227 void
1228 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1229                              GdkRegion     *region,
1230                              gint           page,
1231                              gint           rotation,
1232                              gdouble        scale)
1233 {
1234         CacheJobInfo *job_info;
1235         EvPageCache *page_cache;
1236         gint width, height;
1237
1238         job_info = find_job_cache (pixbuf_cache, page);
1239         if (job_info == NULL)
1240                 return;
1241
1242         page_cache = ev_page_cache_get (pixbuf_cache->document);
1243         ev_page_cache_get_size (page_cache, page, rotation, scale,
1244                                 &width, &height);
1245
1246         add_job (pixbuf_cache, job_info, page_cache, region,
1247                  width, height, page, rotation, scale,
1248                  EV_JOB_PRIORITY_HIGH);
1249 }
1250
1251