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-selection.h"
   5 #include "ev-document-images.h"
   6 #include "ev-document-forms.h"
   7 #include "ev-image.h"
   8 #include "ev-form-field.h"
   9
  10 typedef struct _CacheJobInfo
  11 {
  12         EvJob *job;
  13         EvRenderContext *rc;
  14         gboolean page_ready;
  15
  16         /* Region of the page that needs to be drawn */
  17         GdkRegion *region;
  18
  19         /* Data we get from rendering */
  20         cairo_surface_t *surface;
  21         GList *link_mapping;
  22         GList *image_mapping;
  23         GList *form_field_mapping;
  24         GdkRegion *text_mapping;
  25
  26         /* Selection data.
  27          * Selection_points are the coordinates encapsulated in selection.
  28          * target_points is the target selection size. */
  29         EvRectangle selection_points;
  30         EvRectangle target_points;
  31         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                                            text, base,
 650                                            include_forms,
 651                                            include_links,
 652                                            include_images,
 653                                            include_text,
 654                                            include_selection);
 655         ev_job_queue_add_job (job_info->job, priority);
 656         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 657                           G_CALLBACK (job_page_ready_cb),
 658                           pixbuf_cache);
 659         g_signal_connect (G_OBJECT (job_info->job), "finished",
 660                           G_CALLBACK (job_finished_cb),
 661                           pixbuf_cache);
 662 }
 663
 664 static void
 665 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 666                    CacheJobInfo  *job_info,
 667                    EvPageCache   *page_cache,
 668                    gint           page,
 669                    gint           rotation,
 670                    gfloat         scale,
 671                    EvJobPriority  priority)
 672 {
 673         gint width, height;
 674
 675         if (job_info->job)
 676                 return;
 677
 678         ev_page_cache_get_size (page_cache, page, rotation,
 679                                 scale, &width, &height);
 680
 681         if (job_info->surface &&
 682             cairo_image_surface_get_width (job_info->surface) == width &&
 683             cairo_image_surface_get_height (job_info->surface) == height)
 684                 return;
 685
 686         add_job (pixbuf_cache, job_info, page_cache, NULL,
 687                  width, height, page, rotation, scale,
 688                  priority);
 689 }
 690
 691 static void
 692 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 693                                     gint           rotation,
 694                                     gfloat         scale)
 695 {
 696         EvPageCache *page_cache;
 697         CacheJobInfo *job_info;
 698         int page;
 699         int i;
 700
 701         page_cache = ev_page_cache_get (pixbuf_cache->document);
 702
 703         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 704                 job_info = (pixbuf_cache->job_list + i);
 705                 page = pixbuf_cache->start_page + i;
 706
 707                 add_job_if_needed (pixbuf_cache, job_info,
 708                                    page_cache, page, rotation, scale,
 709                                    EV_JOB_PRIORITY_HIGH);
 710         }
 711
 712         for (i = FIRST_VISABLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 713                 job_info = (pixbuf_cache->prev_job + i);
 714                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 715
 716                 add_job_if_needed (pixbuf_cache, job_info,
 717                                    page_cache, page, rotation, scale,
 718                                    EV_JOB_PRIORITY_LOW);
 719         }
 720
 721         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 722                 job_info = (pixbuf_cache->next_job + i);
 723                 page = pixbuf_cache->end_page + 1 + i;
 724
 725                 add_job_if_needed (pixbuf_cache, job_info,
 726                                    page_cache, page, rotation, scale,
 727                                    EV_JOB_PRIORITY_LOW);
 728         }
 729
 730 }
 731
 732 void
 733 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 734                                 gint            start_page,
 735                                 gint            end_page,
 736                                 gint            rotation,
 737                                 gfloat          scale,
 738                                 GList          *selection_list)
 739 {
 740         EvPageCache *page_cache;
 741
 742         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 743
 744         page_cache = ev_page_cache_get (pixbuf_cache->document);
 745
 746         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 747         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 748         g_return_if_fail (end_page >= start_page);
 749
 750         /* First, resize the page_range as needed.  We cull old pages
 751          * mercilessly. */
 752         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 753
 754         /* Then, we update the current jobs to see if any of them are the wrong
 755          * size, we remove them if we need to. */
 756         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 757
 758         /* Next, we update the target selection for our pages */
 759         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 760
 761         /* Finally, we add the new jobs for all the sizes that don't have a
 762          * pixbuf */
 763         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 764 }
 765
 766 cairo_surface_t *
 767 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 768                              gint           page)
 769 {
 770         CacheJobInfo *job_info;
 771
 772         job_info = find_job_cache (pixbuf_cache, page);
 773         if (job_info == NULL)
 774                 return NULL;
 775
 776         if (job_info->page_ready)
 777                 return job_info->surface;
 778
 779         /* We don't need to wait for the idle to handle the callback */
 780         if (job_info->job &&
 781             EV_JOB_RENDER (job_info->job)->page_ready) {
 782                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 783                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 784         }
 785
 786         return job_info->surface;
 787 }
 788
 789 GList *
 790 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 791                                   gint           page)
 792 {
 793         CacheJobInfo *job_info;
 794
 795         job_info = find_job_cache (pixbuf_cache, page);
 796         if (job_info == NULL)
 797                 return NULL;
 798
 799         /* We don't need to wait for the idle to handle the callback */
 800         if (job_info->job &&
 801             EV_JOB (job_info->job)->finished) {
 802                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 803         }
 804
 805         return job_info->link_mapping;
 806 }
 807
 808 GList *
 809 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 810                                    gint           page)
 811 {
 812         CacheJobInfo *job_info;
 813
 814         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 815                 return NULL;
 816
 817         job_info = find_job_cache (pixbuf_cache, page);
 818         if (job_info == NULL)
 819                 return NULL;
 820
 821         /* We don't need to wait for the idle to handle the callback */
 822         if (job_info->job &&
 823             EV_JOB (job_info->job)->finished) {
 824                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 825         }
 826
 827         return job_info->image_mapping;
 828 }
 829
 830 GList *
 831 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 832                                         gint           page)
 833 {
 834         CacheJobInfo *job_info;
 835
 836         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 837                 return NULL;
 838
 839         job_info = find_job_cache (pixbuf_cache, page);
 840         if (job_info == NULL)
 841                 return NULL;
 842
 843         /* We don't need to wait for the idle to handle the callback */
 844         if (job_info->job &&
 845            EV_JOB (job_info->job)->finished) {
 846                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 847         }
 848
 849         return job_info->form_field_mapping;
 850 }
 851
 852 static gboolean
 853 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 854                              CacheJobInfo  *job_info,
 855                              gint           page,
 856                              gfloat         scale)
 857 {
 858         EvPageCache *page_cache;
 859
 860         if (job_info->selection) {
 861                 gint width, height;
 862                 gint selection_width, selection_height;
 863
 864                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 865                 ev_page_cache_get_size (page_cache, page,
 866                                         job_info->rc->rotation,
 867                                         scale, &width, &height);
 868
 869                 selection_width = cairo_image_surface_get_width (job_info->selection);
 870                 selection_height = cairo_image_surface_get_height (job_info->selection);
 871
 872                 if (width != selection_width || height != selection_height)
 873                         return TRUE;
 874         } else {
 875                 if (job_info->points_set)
 876                         return TRUE;
 877         }
 878
 879         return FALSE;
 880 }
 881
 882 static void
 883 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 884                            CacheJobInfo  *job_info,
 885                            gint           page,
 886                            gfloat         scale)
 887 {
 888         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 889                 if (job_info->selection)
 890                         cairo_surface_destroy (job_info->selection);
 891                 job_info->selection = NULL;
 892                 job_info->selection_points.x1 = -1;
 893         }
 894 }
 895
 896 GdkRegion *
 897 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 898                                   gint           page)
 899 {
 900         CacheJobInfo *job_info;
 901
 902         job_info = find_job_cache (pixbuf_cache, page);
 903         if (job_info == NULL)
 904                 return NULL;
 905
 906         /* We don't need to wait for the idle to handle the callback */
 907         if (job_info->job &&
 908             EV_JOB (job_info->job)->finished) {
 909                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 910         }
 911
 912         return job_info->text_mapping;
 913 }
 914
 915 /* Clears the cache of jobs and pixbufs.
 916  */
 917 void
 918 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 919 {
 920         int i;
 921
 922         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 923                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 924                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 925         }
 926
 927         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 928                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 929         }
 930 }
 931
 932
 933 void
 934 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 935 {
 936         gint i;
 937
 938         /* FIXME: doesn't update running jobs. */
 939         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 940                 CacheJobInfo *job_info;
 941
 942                 job_info = pixbuf_cache->prev_job + i;
 943                 if (job_info->selection) {
 944                         cairo_surface_destroy (job_info->selection);
 945                         job_info->selection = NULL;
 946                 }
 947
 948                 job_info = pixbuf_cache->next_job + i;
 949                 if (job_info->selection) {
 950                         cairo_surface_destroy (job_info->selection);
 951                         job_info->selection = NULL;
 952                 }
 953         }
 954
 955         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 956                 CacheJobInfo *job_info;
 957
 958                 job_info = pixbuf_cache->job_list + i;
 959                 if (job_info->selection) {
 960                         cairo_surface_destroy (job_info->selection);
 961                         job_info->selection = NULL;
 962                 }
 963         }
 964 }
 965
 966 cairo_surface_t *
 967 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 968                                        gint            page,
 969                                        gfloat          scale,
 970                                        GdkRegion     **region)
 971 {
 972         CacheJobInfo *job_info;
 973
 974         /* the document does not implement the selection interface */
 975         if (!EV_IS_SELECTION (pixbuf_cache->document))
 976                 return NULL;
 977
 978         job_info = find_job_cache (pixbuf_cache, page);
 979         if (job_info == NULL)
 980                 return NULL;
 981
 982         /* No selection on this page */
 983         if (!job_info->points_set)
 984                 return NULL;
 985
 986         /* Update the rc */
 987         g_assert (job_info->rc);
 988         ev_render_context_set_scale (job_info->rc, scale);
 989
 990         /* If we have a running job, we just return what we have under the
 991          * assumption that it'll be updated later and we can scale it as need
 992          * be */
 993         if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
 994                 return job_info->selection;
 995
 996         /* Now, lets see if we need to resize the image.  If we do, we clear the
 997          * old one. */
 998         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
 999
1000         /* Finally, we see if the two scales are the same, and get a new pixbuf
1001          * if needed.  We do this synchronously for now.  At some point, we
1002          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1003          * doesn't kill us.  Rendering a few glyphs should really be fast.
1004          */
1005         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1006                 EvRectangle *old_points;
1007                 GdkColor *text, *base;
1008
1009                 /* we need to get a new selection pixbuf */
1010                 ev_document_doc_mutex_lock ();
1011                 if (job_info->selection_points.x1 < 0) {
1012                         g_assert (job_info->selection == NULL);
1013                         old_points = NULL;
1014                 } else {
1015                         g_assert (job_info->selection != NULL);
1016                         old_points = &(job_info->selection_points);
1017                 }
1018
1019                 if (job_info->selection_region)
1020                         gdk_region_destroy (job_info->selection_region);
1021                 job_info->selection_region =
1022                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1023                                                            job_info->rc,
1024                                                            &(job_info->target_points));
1025
1026                 gtk_widget_ensure_style (pixbuf_cache->view);
1027
1028                 get_selection_colors (pixbuf_cache->view, &text, &base);
1029
1030                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1031                                                job_info->rc, &(job_info->selection),
1032                                                &(job_info->target_points),
1033                                                old_points,
1034                                                text, base);
1035                 job_info->selection_points = job_info->target_points;
1036                 ev_document_doc_mutex_unlock ();
1037         }
1038         if (region)
1039                 *region = job_info->selection_region;
1040         return job_info->selection;
1041 }
1042
1043 static void
1044 update_job_selection (CacheJobInfo    *job_info,
1045                       EvViewSelection *selection)
1046 {
1047         job_info->points_set = TRUE;
1048         job_info->target_points = selection->rect;
1049 }
1050
1051 static void
1052 clear_job_selection (CacheJobInfo *job_info)
1053 {
1054         job_info->points_set = FALSE;
1055         job_info->selection_points.x1 = -1;
1056
1057         if (job_info->selection) {
1058                 cairo_surface_destroy (job_info->selection);
1059                 job_info->selection = NULL;
1060         }
1061 }
1062
1063 /* This function will reset the selection on pages that no longer have them, and
1064  * will update the target_selection on those that need it.  It will _not_ free
1065  * the previous selection_list -- that's up to caller to do.
1066  */
1067 void
1068 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1069                                     GList         *selection_list)
1070 {
1071         EvPageCache *page_cache;
1072         EvViewSelection *selection;
1073         GList *list = selection_list;
1074         int page;
1075         int i;
1076
1077         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1078
1079         if (!EV_IS_SELECTION (pixbuf_cache->document))
1080                 return;
1081
1082         page_cache = ev_page_cache_get (pixbuf_cache->document);
1083
1084         /* We check each area to see what needs updating, and what needs freeing; */
1085         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1086         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1087                 if (page < 0) {
1088                         page ++;
1089                         continue;
1090                 }
1091
1092                 selection = NULL;
1093                 while (list) {
1094                         if (((EvViewSelection *)list->data)->page == page) {
1095                                 selection = list->data;
1096                                 break;
1097                         } else if (((EvViewSelection *)list->data)->page > page)
1098                                 break;
1099                         list = list->next;
1100                 }
1101
1102                 if (selection)
1103                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1104                 else
1105                         clear_job_selection (pixbuf_cache->prev_job + i);
1106                 page ++;
1107         }
1108
1109         page = pixbuf_cache->start_page;
1110         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1111                 selection = NULL;
1112                 while (list) {
1113                         if (((EvViewSelection *)list->data)->page == page) {
1114                                 selection = list->data;
1115                                 break;
1116                         } else if (((EvViewSelection *)list->data)->page > page)
1117                                 break;
1118                         list = list->next;
1119                 }
1120
1121                 if (selection)
1122                         update_job_selection (pixbuf_cache->job_list + i, selection);
1123                 else
1124                         clear_job_selection (pixbuf_cache->job_list + i);
1125                 page ++;
1126         }
1127
1128         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1129                 if (page >= ev_page_cache_get_n_pages (page_cache))
1130                         break;
1131
1132                 selection = NULL;
1133                 while (list) {
1134                         if (((EvViewSelection *)list->data)->page == page) {
1135                                 selection = list->data;
1136                                 break;
1137                         } else if (((EvViewSelection *)list->data)->page > page)
1138                                 break;
1139                         list = list->next;
1140                 }
1141
1142                 if (selection)
1143                         update_job_selection (pixbuf_cache->next_job + i, selection);
1144                 else
1145                         clear_job_selection (pixbuf_cache->next_job + i);
1146                 page ++;
1147         }
1148 }
1149
1150
1151 /* Returns what the pixbuf cache thinks is */
1152
1153 GList *
1154 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1155 {
1156         EvPageCache *page_cache;
1157         EvViewSelection *selection;
1158         GList *retval = NULL;
1159         int page;
1160         int i;
1161
1162         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1163
1164         page_cache = ev_page_cache_get (pixbuf_cache->document);
1165
1166         /* We check each area to see what needs updating, and what needs freeing; */
1167         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1168         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1169                 if (page < 0) {
1170                         page ++;
1171                         continue;
1172                 }
1173
1174                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1175                         selection = g_new0 (EvViewSelection, 1);
1176                         selection->page = page;
1177                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1178                         if (pixbuf_cache->prev_job[i].selection_region)
1179                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1180                         retval = g_list_append (retval, selection);
1181                 }
1182
1183                 page ++;
1184         }
1185
1186         page = pixbuf_cache->start_page;
1187         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1188                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1189                         selection = g_new0 (EvViewSelection, 1);
1190                         selection->page = page;
1191                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1192                         if (pixbuf_cache->job_list[i].selection_region)
1193                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1194                         retval = g_list_append (retval, selection);
1195                 }
1196
1197                 page ++;
1198         }
1199
1200         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1201                 if (page >= ev_page_cache_get_n_pages (page_cache))
1202                         break;
1203
1204                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1205                         selection = g_new0 (EvViewSelection, 1);
1206                         selection->page = page;
1207                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1208                         if (pixbuf_cache->next_job[i].selection_region)
1209                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1210                         retval = g_list_append (retval, selection);
1211                 }
1212
1213                 page ++;
1214         }
1215
1216         return retval;
1217 }
1218
1219 void
1220 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1221                              GdkRegion     *region,
1222                              gint           page,
1223                              gint           rotation,
1224                              gdouble        scale)
1225 {
1226         CacheJobInfo *job_info;
1227         EvPageCache *page_cache;
1228         gint width, height;
1229
1230         job_info = find_job_cache (pixbuf_cache, page);
1231         if (job_info == NULL)
1232                 return;
1233
1234         page_cache = ev_page_cache_get (pixbuf_cache->document);
1235         ev_page_cache_get_size (page_cache, page, rotation, scale,
1236                                 &width, &height);
1237
1238         add_job (pixbuf_cache, job_info, page_cache, region,
1239                  width, height, page, rotation, scale,
1240                  EV_JOB_PRIORITY_HIGH);
1241 }
1242
1243