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