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_finished_cb),
 311                                               pixbuf_cache);
 312         ev_job_queue_remove_job (job_info->job);
 313         g_object_unref (job_info->job);
 314         job_info->job = NULL;
 315 }
 316
 317 /* Do all function that copies a job from an older cache to it's position in the
 318  * new cache.  It clears the old job if it doesn't have a place.
 319  */
 320 static void
 321 move_one_job (CacheJobInfo  *job_info,
 322               EvPixbufCache *pixbuf_cache,
 323               int            page,
 324               CacheJobInfo  *new_job_list,
 325               CacheJobInfo  *new_prev_job,
 326               CacheJobInfo  *new_next_job,
 327               int            start_page,
 328               int            end_page,
 329               EvJobPriority  priority)
 330 {
 331         CacheJobInfo *target_page = NULL;
 332         int page_offset;
 333         EvJobPriority new_priority;
 334
 335         if (page < (start_page - pixbuf_cache->preload_cache_size) ||
 336             page > (end_page + pixbuf_cache->preload_cache_size)) {
 337                 dispose_cache_job_info (job_info, pixbuf_cache);
 338                 return;
 339         }
 340
 341         /* find the target page to copy it over to. */
 342         if (page < start_page) {
 343                 page_offset = (page - (start_page - pixbuf_cache->preload_cache_size));
 344
 345                 g_assert (page_offset >= 0 &&
 346                           page_offset < pixbuf_cache->preload_cache_size);
 347                 target_page = new_prev_job + page_offset;
 348                 new_priority = EV_JOB_PRIORITY_LOW;
 349         } else if (page > end_page) {
 350                 page_offset = (page - (end_page + 1));
 351
 352                 g_assert (page_offset >= 0 &&
 353                           page_offset < pixbuf_cache->preload_cache_size);
 354                 target_page = new_next_job + page_offset;
 355                 new_priority = EV_JOB_PRIORITY_LOW;
 356         } else {
 357                 page_offset = page - start_page;
 358                 g_assert (page_offset >= 0 &&
 359                           page_offset <= ((end_page - start_page) + 1));
 360                 new_priority = EV_JOB_PRIORITY_HIGH;
 361                 target_page = new_job_list + page_offset;
 362         }
 363
 364         *target_page = *job_info;
 365         job_info->job = NULL;
 366         job_info->region = NULL;
 367         job_info->surface = NULL;
 368         job_info->link_mapping = NULL;
 369         job_info->image_mapping = NULL;
 370         job_info->form_field_mapping = NULL;
 371
 372         if (new_priority != priority && target_page->job) {
 373                 ev_job_queue_update_job (target_page->job, new_priority);
 374         }
 375 }
 376
 377 static void
 378 ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
 379                               gint           start_page,
 380                               gint           end_page)
 381 {
 382         CacheJobInfo *new_job_list;
 383         CacheJobInfo *new_prev_job;
 384         CacheJobInfo *new_next_job;
 385         EvPageCache *page_cache;
 386         int i, page;
 387
 388         if (pixbuf_cache->start_page == start_page &&
 389             pixbuf_cache->end_page == end_page)
 390                 return;
 391
 392         page_cache = ev_page_cache_get (pixbuf_cache->document);
 393
 394         new_job_list = g_new0 (CacheJobInfo, (end_page - start_page) + 1);
 395         new_prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 396         new_next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 397
 398         /* We go through each job in the old cache and either clear it or move
 399          * it to a new location. */
 400
 401         /* Start with the prev cache. */
 402         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 403         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 404                 if (page < 0) {
 405                         dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 406                 } else {
 407                         move_one_job (pixbuf_cache->prev_job + i,
 408                                       pixbuf_cache, page,
 409                                       new_job_list, new_prev_job, new_next_job,
 410                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 411                 }
 412                 page ++;
 413         }
 414
 415         page = pixbuf_cache->start_page;
 416         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 417                 move_one_job (pixbuf_cache->job_list + i,
 418                               pixbuf_cache, page,
 419                               new_job_list, new_prev_job, new_next_job,
 420                               start_page, end_page, EV_JOB_PRIORITY_HIGH);
 421                 page ++;
 422         }
 423
 424         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 425                 if (page >= ev_page_cache_get_n_pages (page_cache)) {
 426                         dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 427                 } else {
 428                         move_one_job (pixbuf_cache->next_job + i,
 429                                       pixbuf_cache, page,
 430                                       new_job_list, new_prev_job, new_next_job,
 431                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 432                 }
 433                 page ++;
 434         }
 435
 436         g_free (pixbuf_cache->job_list);
 437         g_free (pixbuf_cache->prev_job);
 438         g_free (pixbuf_cache->next_job);
 439
 440         pixbuf_cache->job_list = new_job_list;
 441         pixbuf_cache->prev_job = new_prev_job;
 442         pixbuf_cache->next_job = new_next_job;
 443
 444         pixbuf_cache->start_page = start_page;
 445         pixbuf_cache->end_page = end_page;
 446 }
 447
 448 static void
 449 copy_job_page_and_selection_to_job_info (EvJobRender   *job_render,
 450                                          CacheJobInfo  *job_info,
 451                                          EvPixbufCache *pixbuf_cache)
 452 {
 453         if (job_info->surface) {
 454                 cairo_surface_destroy (job_info->surface);
 455         }
 456         job_info->surface = cairo_surface_reference (job_render->surface);
 457
 458         if (job_info->rc) {
 459                 g_object_unref (G_OBJECT (job_info->rc));
 460         }
 461         job_info->rc = g_object_ref (job_render->rc);
 462
 463         job_info->points_set = FALSE;
 464         if (job_render->include_selection) {
 465                 if (job_info->selection) {
 466                         cairo_surface_destroy (job_info->selection);
 467                         job_info->selection = NULL;
 468                 }
 469                 if (job_info->selection_region) {
 470                         gdk_region_destroy (job_info->selection_region);
 471                         job_info->selection_region = NULL;
 472                 }
 473
 474                 job_info->selection_points = job_render->selection_points;
 475                 job_info->selection_region = gdk_region_copy (job_render->selection_region);
 476                 job_info->selection = cairo_surface_reference (job_render->selection);
 477                 g_assert (job_info->selection_points.x1 >= 0);
 478                 job_info->points_set = TRUE;
 479         }
 480
 481         if (job_info->job) {
 482                 g_signal_handlers_disconnect_by_func (job_info->job,
 483                                                       G_CALLBACK (job_page_ready_cb),
 484                                                       pixbuf_cache);
 485         }
 486
 487         job_info->page_ready = TRUE;
 488 }
 489
 490 static void
 491 copy_job_to_job_info (EvJobRender   *job_render,
 492                       CacheJobInfo  *job_info,
 493                       EvPixbufCache *pixbuf_cache)
 494 {
 495         if (job_render->include_links) {
 496                 if (job_info->link_mapping)
 497                         ev_link_mapping_free (job_info->link_mapping);
 498                 job_info->link_mapping = job_render->link_mapping;
 499         }
 500
 501         if (job_render->include_images) {
 502                 if (job_info->image_mapping)
 503                         ev_image_mapping_free (job_info->image_mapping);
 504                 job_info->image_mapping = job_render->image_mapping;
 505         }
 506
 507         if (job_render->include_forms) {
 508                 if (job_info->form_field_mapping)
 509                         ev_form_field_mapping_free (job_info->form_field_mapping);
 510                 job_info->form_field_mapping = job_render->form_field_mapping;
 511         }
 512
 513         if (job_render->include_text) {
 514                 if (job_info->text_mapping)
 515                         gdk_region_destroy (job_info->text_mapping);
 516                 job_info->text_mapping = job_render->text_mapping;
 517         }
 518
 519         if (job_info->job) {
 520                 g_signal_handlers_disconnect_by_func (job_info->job,
 521                                                       G_CALLBACK (job_finished_cb),
 522                                                       pixbuf_cache);
 523                 ev_job_queue_remove_job (job_info->job);
 524                 g_object_unref (G_OBJECT (job_info->job));
 525                 job_info->job = NULL;
 526         }
 527 }
 528
 529 static CacheJobInfo *
 530 find_job_cache (EvPixbufCache *pixbuf_cache,
 531                 int            page)
 532 {
 533         int page_offset;
 534
 535         if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
 536             page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
 537                 return NULL;
 538
 539         if (page < pixbuf_cache->start_page) {
 540                 page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
 541
 542                 g_assert (page_offset >= 0 &&
 543                           page_offset < pixbuf_cache->preload_cache_size);
 544                 return pixbuf_cache->prev_job + page_offset;
 545         }
 546
 547         if (page > pixbuf_cache->end_page) {
 548                 page_offset = (page - (pixbuf_cache->end_page + 1));
 549
 550                 g_assert (page_offset >= 0 &&
 551                           page_offset < pixbuf_cache->preload_cache_size);
 552                 return pixbuf_cache->next_job + page_offset;
 553         }
 554
 555         page_offset = page - pixbuf_cache->start_page;
 556         g_assert (page_offset >= 0 &&
 557                   page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
 558         return pixbuf_cache->job_list + page_offset;
 559 }
 560
 561 static void
 562 ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
 563                                  gfloat         scale)
 564 {
 565         EvPageCache *page_cache;
 566         int i;
 567
 568         page_cache = ev_page_cache_get (pixbuf_cache->document);
 569
 570         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 571                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, page_cache, scale);
 572         }
 573
 574         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 575                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, page_cache, scale);
 576                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, page_cache, scale);
 577         }
 578 }
 579
 580 #define FIRST_VISABLE_PREV(pixbuf_cache) \
 581         (MAX (0, pixbuf_cache->preload_cache_size + 1 - pixbuf_cache->start_page))
 582
 583 static void
 584 get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
 585 {
 586     if (GTK_WIDGET_HAS_FOCUS (widget)) {
 587         *text = &widget->style->text [GTK_STATE_SELECTED];
 588         *base = &widget->style->base [GTK_STATE_SELECTED];
 589     } else {
 590         *text = &widget->style->text [GTK_STATE_ACTIVE];
 591         *base = &widget->style->base [GTK_STATE_ACTIVE];
 592     }
 593 }
 594
 595 static void
 596 add_job (EvPixbufCache *pixbuf_cache,
 597          CacheJobInfo  *job_info,
 598          EvPageCache   *page_cache,
 599          GdkRegion     *region,
 600          gint           width,
 601          gint           height,
 602          gint           page,
 603          gint           rotation,
 604          gfloat         scale,
 605          EvJobPriority  priority)
 606 {
 607         gboolean include_links = FALSE;
 608         gboolean include_text = FALSE;
 609         gboolean include_selection = FALSE;
 610         gboolean include_images = TRUE;
 611         gboolean include_forms = FALSE;
 612         GdkColor *text, *base;
 613
 614         job_info->page_ready = FALSE;
 615
 616         if (job_info->rc == NULL) {
 617                 job_info->rc = ev_render_context_new (rotation, page, scale);
 618         } else {
 619                 ev_render_context_set_rotation (job_info->rc, rotation);
 620                 ev_render_context_set_page (job_info->rc, page);
 621                 ev_render_context_set_scale (job_info->rc, scale);
 622         }
 623
 624         if (job_info->region)
 625                 gdk_region_destroy (job_info->region);
 626         job_info->region = region ? gdk_region_copy (region) : NULL;
 627
 628         /* Figure out what else we need for this job */
 629         if (job_info->link_mapping == NULL)
 630                 include_links = TRUE;
 631         if (job_info->image_mapping == NULL)
 632                 include_images = TRUE;
 633         if (job_info->form_field_mapping == NULL)
 634                 include_forms = TRUE;
 635         if (job_info->text_mapping == NULL)
 636                 include_text = TRUE;
 637         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 638                 include_selection = TRUE;
 639         }
 640
 641         gtk_widget_ensure_style (pixbuf_cache->view);
 642
 643         get_selection_colors (pixbuf_cache->view, &text, &base);
 644
 645         job_info->job = ev_job_render_new (pixbuf_cache->document,
 646                                            job_info->rc,
 647                                            width, height,
 648                                            &(job_info->target_points),
 649                                            job_info->selection_style,
 650                                            text, base,
 651                                            include_forms,
 652                                            include_links,
 653                                            include_images,
 654                                            include_text,
 655                                            include_selection);
 656         ev_job_queue_add_job (job_info->job, priority);
 657         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 658                           G_CALLBACK (job_page_ready_cb),
 659                           pixbuf_cache);
 660         g_signal_connect (G_OBJECT (job_info->job), "finished",
 661                           G_CALLBACK (job_finished_cb),
 662                           pixbuf_cache);
 663 }
 664
 665 static void
 666 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 667                    CacheJobInfo  *job_info,
 668                    EvPageCache   *page_cache,
 669                    gint           page,
 670                    gint           rotation,
 671                    gfloat         scale,
 672                    EvJobPriority  priority)
 673 {
 674         gint width, height;
 675
 676         if (job_info->job)
 677                 return;
 678
 679         ev_page_cache_get_size (page_cache, page, rotation,
 680                                 scale, &width, &height);
 681
 682         if (job_info->surface &&
 683             cairo_image_surface_get_width (job_info->surface) == width &&
 684             cairo_image_surface_get_height (job_info->surface) == height)
 685                 return;
 686
 687         add_job (pixbuf_cache, job_info, page_cache, NULL,
 688                  width, height, page, rotation, scale,
 689                  priority);
 690 }
 691
 692 static void
 693 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 694                                     gint           rotation,
 695                                     gfloat         scale)
 696 {
 697         EvPageCache *page_cache;
 698         CacheJobInfo *job_info;
 699         int page;
 700         int i;
 701
 702         page_cache = ev_page_cache_get (pixbuf_cache->document);
 703
 704         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 705                 job_info = (pixbuf_cache->job_list + i);
 706                 page = pixbuf_cache->start_page + i;
 707
 708                 add_job_if_needed (pixbuf_cache, job_info,
 709                                    page_cache, page, rotation, scale,
 710                                    EV_JOB_PRIORITY_HIGH);
 711         }
 712
 713         for (i = FIRST_VISABLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 714                 job_info = (pixbuf_cache->prev_job + i);
 715                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 716
 717                 add_job_if_needed (pixbuf_cache, job_info,
 718                                    page_cache, page, rotation, scale,
 719                                    EV_JOB_PRIORITY_LOW);
 720         }
 721
 722         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 723                 job_info = (pixbuf_cache->next_job + i);
 724                 page = pixbuf_cache->end_page + 1 + i;
 725
 726                 add_job_if_needed (pixbuf_cache, job_info,
 727                                    page_cache, page, rotation, scale,
 728                                    EV_JOB_PRIORITY_LOW);
 729         }
 730
 731 }
 732
 733 void
 734 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 735                                 gint            start_page,
 736                                 gint            end_page,
 737                                 gint            rotation,
 738                                 gfloat          scale,
 739                                 GList          *selection_list)
 740 {
 741         EvPageCache *page_cache;
 742
 743         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 744
 745         page_cache = ev_page_cache_get (pixbuf_cache->document);
 746
 747         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 748         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 749         g_return_if_fail (end_page >= start_page);
 750
 751         /* First, resize the page_range as needed.  We cull old pages
 752          * mercilessly. */
 753         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 754
 755         /* Then, we update the current jobs to see if any of them are the wrong
 756          * size, we remove them if we need to. */
 757         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 758
 759         /* Next, we update the target selection for our pages */
 760         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 761
 762         /* Finally, we add the new jobs for all the sizes that don't have a
 763          * pixbuf */
 764         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 765 }
 766
 767 cairo_surface_t *
 768 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 769                              gint           page)
 770 {
 771         CacheJobInfo *job_info;
 772
 773         job_info = find_job_cache (pixbuf_cache, page);
 774         if (job_info == NULL)
 775                 return NULL;
 776
 777         if (job_info->page_ready)
 778                 return job_info->surface;
 779
 780         /* We don't need to wait for the idle to handle the callback */
 781         if (job_info->job &&
 782             EV_JOB_RENDER (job_info->job)->page_ready) {
 783                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 784                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 785         }
 786
 787         return job_info->surface;
 788 }
 789
 790 GList *
 791 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 792                                   gint           page)
 793 {
 794         CacheJobInfo *job_info;
 795
 796         job_info = find_job_cache (pixbuf_cache, page);
 797         if (job_info == NULL)
 798                 return NULL;
 799
 800         /* We don't need to wait for the idle to handle the callback */
 801         if (job_info->job &&
 802             EV_JOB (job_info->job)->finished) {
 803                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 804         }
 805
 806         return job_info->link_mapping;
 807 }
 808
 809 GList *
 810 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 811                                    gint           page)
 812 {
 813         CacheJobInfo *job_info;
 814
 815         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 816                 return NULL;
 817
 818         job_info = find_job_cache (pixbuf_cache, page);
 819         if (job_info == NULL)
 820                 return NULL;
 821
 822         /* We don't need to wait for the idle to handle the callback */
 823         if (job_info->job &&
 824             EV_JOB (job_info->job)->finished) {
 825                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 826         }
 827
 828         return job_info->image_mapping;
 829 }
 830
 831 GList *
 832 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 833                                         gint           page)
 834 {
 835         CacheJobInfo *job_info;
 836
 837         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 838                 return NULL;
 839
 840         job_info = find_job_cache (pixbuf_cache, page);
 841         if (job_info == NULL)
 842                 return NULL;
 843
 844         /* We don't need to wait for the idle to handle the callback */
 845         if (job_info->job &&
 846            EV_JOB (job_info->job)->finished) {
 847                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 848         }
 849
 850         return job_info->form_field_mapping;
 851 }
 852
 853 static gboolean
 854 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 855                              CacheJobInfo  *job_info,
 856                              gint           page,
 857                              gfloat         scale)
 858 {
 859         EvPageCache *page_cache;
 860
 861         if (job_info->selection) {
 862                 gint width, height;
 863                 gint selection_width, selection_height;
 864
 865                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 866                 ev_page_cache_get_size (page_cache, page,
 867                                         job_info->rc->rotation,
 868                                         scale, &width, &height);
 869
 870                 selection_width = cairo_image_surface_get_width (job_info->selection);
 871                 selection_height = cairo_image_surface_get_height (job_info->selection);
 872
 873                 if (width != selection_width || height != selection_height)
 874                         return TRUE;
 875         } else {
 876                 if (job_info->points_set)
 877                         return TRUE;
 878         }
 879
 880         return FALSE;
 881 }
 882
 883 static void
 884 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 885                            CacheJobInfo  *job_info,
 886                            gint           page,
 887                            gfloat         scale)
 888 {
 889         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 890                 if (job_info->selection)
 891                         cairo_surface_destroy (job_info->selection);
 892                 job_info->selection = NULL;
 893                 job_info->selection_points.x1 = -1;
 894         }
 895 }
 896
 897 GdkRegion *
 898 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 899                                   gint           page)
 900 {
 901         CacheJobInfo *job_info;
 902
 903         job_info = find_job_cache (pixbuf_cache, page);
 904         if (job_info == NULL)
 905                 return NULL;
 906
 907         /* We don't need to wait for the idle to handle the callback */
 908         if (job_info->job &&
 909             EV_JOB (job_info->job)->finished) {
 910                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 911         }
 912
 913         return job_info->text_mapping;
 914 }
 915
 916 /* Clears the cache of jobs and pixbufs.
 917  */
 918 void
 919 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 920 {
 921         int i;
 922
 923         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 924                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 925                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 926         }
 927
 928         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 929                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 930         }
 931 }
 932
 933
 934 void
 935 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 936 {
 937         gint i;
 938
 939         /* FIXME: doesn't update running jobs. */
 940         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 941                 CacheJobInfo *job_info;
 942
 943                 job_info = pixbuf_cache->prev_job + i;
 944                 if (job_info->selection) {
 945                         cairo_surface_destroy (job_info->selection);
 946                         job_info->selection = NULL;
 947                 }
 948
 949                 job_info = pixbuf_cache->next_job + i;
 950                 if (job_info->selection) {
 951                         cairo_surface_destroy (job_info->selection);
 952                         job_info->selection = NULL;
 953                 }
 954         }
 955
 956         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 957                 CacheJobInfo *job_info;
 958
 959                 job_info = pixbuf_cache->job_list + i;
 960                 if (job_info->selection) {
 961                         cairo_surface_destroy (job_info->selection);
 962                         job_info->selection = NULL;
 963                 }
 964         }
 965 }
 966
 967 cairo_surface_t *
 968 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 969                                        gint            page,
 970                                        gfloat          scale,
 971                                        GdkRegion     **region)
 972 {
 973         CacheJobInfo *job_info;
 974
 975         /* the document does not implement the selection interface */
 976         if (!EV_IS_SELECTION (pixbuf_cache->document))
 977                 return NULL;
 978
 979         job_info = find_job_cache (pixbuf_cache, page);
 980         if (job_info == NULL)
 981                 return NULL;
 982
 983         /* No selection on this page */
 984         if (!job_info->points_set)
 985                 return NULL;
 986
 987         /* Update the rc */
 988         g_assert (job_info->rc);
 989         ev_render_context_set_scale (job_info->rc, scale);
 990
 991         /* If we have a running job, we just return what we have under the
 992          * assumption that it'll be updated later and we can scale it as need
 993          * be */
 994         if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
 995                 return job_info->selection;
 996
 997         /* Now, lets see if we need to resize the image.  If we do, we clear the
 998          * old one. */
 999         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
1000
1001         /* Finally, we see if the two scales are the same, and get a new pixbuf
1002          * if needed.  We do this synchronously for now.  At some point, we
1003          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1004          * doesn't kill us.  Rendering a few glyphs should really be fast.
1005          */
1006         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1007                 EvRectangle *old_points;
1008                 GdkColor *text, *base;
1009
1010                 /* we need to get a new selection pixbuf */
1011                 ev_document_doc_mutex_lock ();
1012                 if (job_info->selection_points.x1 < 0) {
1013                         g_assert (job_info->selection == NULL);
1014                         old_points = NULL;
1015                 } else {
1016                         g_assert (job_info->selection != NULL);
1017                         old_points = &(job_info->selection_points);
1018                 }
1019
1020                 if (job_info->selection_region)
1021                         gdk_region_destroy (job_info->selection_region);
1022                 job_info->selection_region =
1023                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1024                                                            job_info->rc,
1025                                                            job_info->selection_style,
1026                                                            &(job_info->target_points));
1027
1028                 gtk_widget_ensure_style (pixbuf_cache->view);
1029
1030                 get_selection_colors (pixbuf_cache->view, &text, &base);
1031
1032                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1033                                                job_info->rc, &(job_info->selection),
1034                                                &(job_info->target_points),
1035                                                old_points,
1036                                                job_info->selection_style,
1037                                                text, base);
1038                 job_info->selection_points = job_info->target_points;
1039                 ev_document_doc_mutex_unlock ();
1040         }
1041         if (region)
1042                 *region = job_info->selection_region;
1043         return job_info->selection;
1044 }
1045
1046 static void
1047 update_job_selection (CacheJobInfo    *job_info,
1048                       EvViewSelection *selection)
1049 {
1050         job_info->points_set = TRUE;
1051         job_info->target_points = selection->rect;
1052         job_info->selection_style = selection->style;
1053 }
1054
1055 static void
1056 clear_job_selection (CacheJobInfo *job_info)
1057 {
1058         job_info->points_set = FALSE;
1059         job_info->selection_points.x1 = -1;
1060
1061         if (job_info->selection) {
1062                 cairo_surface_destroy (job_info->selection);
1063                 job_info->selection = NULL;
1064         }
1065 }
1066
1067 /* This function will reset the selection on pages that no longer have them, and
1068  * will update the target_selection on those that need it.  It will _not_ free
1069  * the previous selection_list -- that's up to caller to do.
1070  */
1071 void
1072 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1073                                     GList         *selection_list)
1074 {
1075         EvPageCache *page_cache;
1076         EvViewSelection *selection;
1077         GList *list = selection_list;
1078         int page;
1079         int i;
1080
1081         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1082
1083         if (!EV_IS_SELECTION (pixbuf_cache->document))
1084                 return;
1085
1086         page_cache = ev_page_cache_get (pixbuf_cache->document);
1087
1088         /* We check each area to see what needs updating, and what needs freeing; */
1089         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1090         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1091                 if (page < 0) {
1092                         page ++;
1093                         continue;
1094                 }
1095
1096                 selection = NULL;
1097                 while (list) {
1098                         if (((EvViewSelection *)list->data)->page == page) {
1099                                 selection = list->data;
1100                                 break;
1101                         } else if (((EvViewSelection *)list->data)->page > page)
1102                                 break;
1103                         list = list->next;
1104                 }
1105
1106                 if (selection)
1107                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1108                 else
1109                         clear_job_selection (pixbuf_cache->prev_job + i);
1110                 page ++;
1111         }
1112
1113         page = pixbuf_cache->start_page;
1114         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1115                 selection = NULL;
1116                 while (list) {
1117                         if (((EvViewSelection *)list->data)->page == page) {
1118                                 selection = list->data;
1119                                 break;
1120                         } else if (((EvViewSelection *)list->data)->page > page)
1121                                 break;
1122                         list = list->next;
1123                 }
1124
1125                 if (selection)
1126                         update_job_selection (pixbuf_cache->job_list + i, selection);
1127                 else
1128                         clear_job_selection (pixbuf_cache->job_list + i);
1129                 page ++;
1130         }
1131
1132         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1133                 if (page >= ev_page_cache_get_n_pages (page_cache))
1134                         break;
1135
1136                 selection = NULL;
1137                 while (list) {
1138                         if (((EvViewSelection *)list->data)->page == page) {
1139                                 selection = list->data;
1140                                 break;
1141                         } else if (((EvViewSelection *)list->data)->page > page)
1142                                 break;
1143                         list = list->next;
1144                 }
1145
1146                 if (selection)
1147                         update_job_selection (pixbuf_cache->next_job + i, selection);
1148                 else
1149                         clear_job_selection (pixbuf_cache->next_job + i);
1150                 page ++;
1151         }
1152 }
1153
1154
1155 /* Returns what the pixbuf cache thinks is */
1156
1157 GList *
1158 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1159 {
1160         EvPageCache *page_cache;
1161         EvViewSelection *selection;
1162         GList *retval = NULL;
1163         int page;
1164         int i;
1165
1166         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1167
1168         page_cache = ev_page_cache_get (pixbuf_cache->document);
1169
1170         /* We check each area to see what needs updating, and what needs freeing; */
1171         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1172         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1173                 if (page < 0) {
1174                         page ++;
1175                         continue;
1176                 }
1177
1178                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1179                         selection = g_new0 (EvViewSelection, 1);
1180                         selection->page = page;
1181                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1182                         if (pixbuf_cache->prev_job[i].selection_region)
1183                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1184                         retval = g_list_append (retval, selection);
1185                 }
1186
1187                 page ++;
1188         }
1189
1190         page = pixbuf_cache->start_page;
1191         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1192                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1193                         selection = g_new0 (EvViewSelection, 1);
1194                         selection->page = page;
1195                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1196                         if (pixbuf_cache->job_list[i].selection_region)
1197                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1198                         retval = g_list_append (retval, selection);
1199                 }
1200
1201                 page ++;
1202         }
1203
1204         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1205                 if (page >= ev_page_cache_get_n_pages (page_cache))
1206                         break;
1207
1208                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1209                         selection = g_new0 (EvViewSelection, 1);
1210                         selection->page = page;
1211                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1212                         if (pixbuf_cache->next_job[i].selection_region)
1213                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1214                         retval = g_list_append (retval, selection);
1215                 }
1216
1217                 page ++;
1218         }
1219
1220         return retval;
1221 }
1222
1223 void
1224 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1225                              GdkRegion     *region,
1226                              gint           page,
1227                              gint           rotation,
1228                              gdouble        scale)
1229 {
1230         CacheJobInfo *job_info;
1231         EvPageCache *page_cache;
1232         gint width, height;
1233
1234         job_info = find_job_cache (pixbuf_cache, page);
1235         if (job_info == NULL)
1236                 return;
1237
1238         page_cache = ev_page_cache_get (pixbuf_cache->document);
1239         ev_page_cache_get_size (page_cache, page, rotation, scale,
1240                                 &width, &height);
1241
1242         add_job (pixbuf_cache, job_info, page_cache, region,
1243                  width, height, page, rotation, scale,
1244                  EV_JOB_PRIORITY_HIGH);
1245 }
1246
1247