shell/ev-pixbuf-cache.c

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