shell/ev-pixbuf-cache.c

   1 #include <config.h>
   2 #include "ev-pixbuf-cache.h"
   3 #include "ev-job-scheduler.h"
   4 #include "ev-page-cache.h"
   5 #include "ev-document-images.h"
   6 #include "ev-document-forms.h"
   7 #include "ev-image.h"
   8 #include "ev-form-field.h"
   9
  10 typedef struct _CacheJobInfo
  11 {
  12         EvJob *job;
  13         EvRenderContext *rc;
  14         gboolean page_ready;
  15
  16         /* Region of the page that needs to be drawn */
  17         GdkRegion *region;
  18
  19         /* Data we get from rendering */
  20         cairo_surface_t *surface;
  21         GList *link_mapping;
  22         GList *image_mapping;
  23         GList *form_field_mapping;
  24         GdkRegion *text_mapping;
  25
  26         /* Selection data.
  27          * Selection_points are the coordinates encapsulated in selection.
  28          * target_points is the target selection size. */
  29         EvRectangle      selection_points;
  30         EvRectangle      target_points;
  31         EvSelectionStyle selection_style;
  32         gboolean         points_set;
  33
  34         cairo_surface_t *selection;
  35         GdkRegion *selection_region;
  36 } CacheJobInfo;
  37
  38 struct _EvPixbufCache
  39 {
  40         GObject parent;
  41
  42         /* We keep a link to our containing view just for style information. */
  43         GtkWidget *view;
  44         EvDocument *document;
  45         int start_page;
  46         int end_page;
  47
  48         /* preload_cache_size is the number of pages prior to the current
  49          * visible area that we cache.  It's normally 1, but could be 2 in the
  50          * case of twin pages.
  51          */
  52         int preload_cache_size;
  53         CacheJobInfo *prev_job;
  54         CacheJobInfo *job_list;
  55         CacheJobInfo *next_job;
  56 };
  57
  58 struct _EvPixbufCacheClass
  59 {
  60         GObjectClass parent_class;
  61
  62         void (* job_finished) (EvPixbufCache *pixbuf_cache);
  63 };
  64
  65
  66 enum
  67 {
  68         JOB_FINISHED,
  69         N_SIGNALS,
  70 };
  71
  72 static guint signals[N_SIGNALS] = {0, };
  73
  74 static void          ev_pixbuf_cache_init       (EvPixbufCache      *pixbuf_cache);
  75 static void          ev_pixbuf_cache_class_init (EvPixbufCacheClass *pixbuf_cache);
  76 static void          ev_pixbuf_cache_finalize   (GObject            *object);
  77 static void          ev_pixbuf_cache_dispose    (GObject            *object);
  78 static void          job_page_ready_cb          (EvJob              *job,
  79                                                  EvPixbufCache      *pixbuf_cache);
  80 static void          job_finished_cb            (EvJob              *job,
  81                                                  EvPixbufCache      *pixbuf_cache);
  82 static CacheJobInfo *find_job_cache             (EvPixbufCache      *pixbuf_cache,
  83                                                  int                 page);
  84 static void          copy_job_to_job_info       (EvJobRender        *job_render,
  85                                                  CacheJobInfo       *job_info,
  86                                                  EvPixbufCache      *pixbuf_cache);
  87 static void          copy_job_page_and_selection_to_job_info (EvJobRender        *job_render,
  88                                                               CacheJobInfo       *job_info,
  89                                                               EvPixbufCache      *pixbuf_cache);
  90 static gboolean      new_selection_surface_needed(EvPixbufCache      *pixbuf_cache,
  91                                                   CacheJobInfo       *job_info,
  92                                                   gint                page,
  93                                                   gfloat              scale);
  94
  95
  96 /* These are used for iterating through the prev and next arrays */
  97 #define FIRST_VISIBLE_PREV(pixbuf_cache) \
  98         (MAX (0, pixbuf_cache->preload_cache_size - pixbuf_cache->start_page))
  99 #define VISIBLE_NEXT_LEN(pixbuf_cache, page_cache) \
 100         (MIN(pixbuf_cache->preload_cache_size, ev_page_cache_get_n_pages (page_cache) - (1 + pixbuf_cache->end_page)))
 101 #define PAGE_CACHE_LEN(pixbuf_cache) \
 102         ((pixbuf_cache->end_page - pixbuf_cache->start_page) + 1)
 103
 104 G_DEFINE_TYPE (EvPixbufCache, ev_pixbuf_cache, G_TYPE_OBJECT)
 105
 106 static void
 107 ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache)
 108 {
 109         pixbuf_cache->start_page = 0;
 110         pixbuf_cache->end_page = 0;
 111         pixbuf_cache->job_list = g_new0 (CacheJobInfo, PAGE_CACHE_LEN (pixbuf_cache));
 112
 113         pixbuf_cache->preload_cache_size = 2;
 114         pixbuf_cache->prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 115         pixbuf_cache->next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 116 }
 117
 118 static void
 119 ev_pixbuf_cache_class_init (EvPixbufCacheClass *class)
 120 {
 121         GObjectClass *object_class;
 122
 123         object_class = G_OBJECT_CLASS (class);
 124
 125         object_class->finalize = ev_pixbuf_cache_finalize;
 126         object_class->dispose = ev_pixbuf_cache_dispose;
 127
 128         signals[JOB_FINISHED] =
 129                 g_signal_new ("job-finished",
 130                               G_OBJECT_CLASS_TYPE (object_class),
 131                               G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 132                               G_STRUCT_OFFSET (EvPixbufCacheClass, job_finished),
 133                               NULL, NULL,
 134                               g_cclosure_marshal_VOID__POINTER,
 135                               G_TYPE_NONE, 1,
 136                               G_TYPE_POINTER);
 137 }
 138
 139 static void
 140 ev_pixbuf_cache_finalize (GObject *object)
 141 {
 142         EvPixbufCache *pixbuf_cache;
 143
 144         pixbuf_cache = EV_PIXBUF_CACHE (object);
 145
 146         g_free (pixbuf_cache->prev_job);
 147         g_free (pixbuf_cache->job_list);
 148         g_free (pixbuf_cache->next_job);
 149
 150         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->finalize (object);
 151 }
 152
 153 static void
 154 dispose_cache_job_info (CacheJobInfo *job_info,
 155                         gpointer      data)
 156 {
 157         if (job_info == NULL)
 158                 return;
 159         if (job_info->job) {
 160                 g_signal_handlers_disconnect_by_func (job_info->job,
 161                                                       G_CALLBACK (job_page_ready_cb),
 162                                                       data);
 163                 g_signal_handlers_disconnect_by_func (job_info->job,
 164                                                       G_CALLBACK (job_finished_cb),
 165                                                       data);
 166                 ev_job_cancel (job_info->job);
 167                 g_object_unref (job_info->job);
 168                 job_info->job = NULL;
 169         }
 170         if (job_info->surface) {
 171                 cairo_surface_destroy (job_info->surface);
 172                 job_info->surface = NULL;
 173         }
 174         if (job_info->region) {
 175                 gdk_region_destroy (job_info->region);
 176                 job_info->region = NULL;
 177         }
 178         if (job_info->link_mapping) {
 179                 ev_link_mapping_free (job_info->link_mapping);
 180                 job_info->link_mapping = NULL;
 181         }
 182         if (job_info->image_mapping) {
 183                 ev_image_mapping_free (job_info->image_mapping);
 184                 job_info->image_mapping = NULL;
 185         }
 186         if (job_info->form_field_mapping) {
 187                 ev_form_field_mapping_free (job_info->form_field_mapping);
 188                 job_info->form_field_mapping = NULL;
 189         }
 190         if (job_info->text_mapping) {
 191                 gdk_region_destroy (job_info->text_mapping);
 192                 job_info->text_mapping = NULL;
 193         }
 194         if (job_info->selection) {
 195                 cairo_surface_destroy (job_info->selection);
 196                 job_info->selection = NULL;
 197         }
 198         if (job_info->selection_region) {
 199                 gdk_region_destroy (job_info->selection_region);
 200                 job_info->selection_region = NULL;
 201         }
 202         if (job_info->rc) {
 203                 g_object_unref (G_OBJECT (job_info->rc));
 204                 job_info->rc = NULL;
 205         }
 206
 207         job_info->points_set = FALSE;
 208 }
 209
 210 static void
 211 ev_pixbuf_cache_dispose (GObject *object)
 212 {
 213         EvPixbufCache *pixbuf_cache;
 214         int i;
 215
 216         pixbuf_cache = EV_PIXBUF_CACHE (object);
 217
 218         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 219                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 220                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 221         }
 222
 223         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 224                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 225         }
 226
 227         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->dispose (object);
 228 }
 229
 230
 231 EvPixbufCache *
 232 ev_pixbuf_cache_new (GtkWidget  *view,
 233                      EvDocument *document)
 234 {
 235         EvPixbufCache *pixbuf_cache;
 236
 237         pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
 238         /* This is a backlink, so we don't ref this */
 239         pixbuf_cache->view = view;
 240         pixbuf_cache->document = document;
 241
 242         return pixbuf_cache;
 243 }
 244
 245 static void
 246 job_page_ready_cb (EvJob         *job,
 247                    EvPixbufCache *pixbuf_cache)
 248 {
 249         CacheJobInfo *job_info;
 250         EvJobRender *job_render = EV_JOB_RENDER (job);
 251
 252         /* If the job is outside of our interest, we silently discard it */
 253         if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 254             (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
 255                 g_object_unref (job);
 256                 return;
 257         }
 258
 259         job_info = find_job_cache (pixbuf_cache, job_render->page);
 260
 261         copy_job_page_and_selection_to_job_info (job_render, job_info, pixbuf_cache);
 262         g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 263 }
 264
 265 static void
 266 job_finished_cb (EvJob         *job,
 267                  EvPixbufCache *pixbuf_cache)
 268 {
 269         CacheJobInfo *job_info;
 270         EvJobRender *job_render = EV_JOB_RENDER (job);
 271
 272         /* If the job is outside of our interest, we silently discard it */
 273         if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 274             (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
 275                 g_object_unref (job);
 276                 return;
 277         }
 278
 279         job_info = find_job_cache (pixbuf_cache, job_render->page);
 280         copy_job_to_job_info (job_render, job_info, pixbuf_cache);
 281 }
 282
 283 /* This checks a job to see if the job would generate the right sized pixbuf
 284  * given a scale.  If it won't, it removes the job and clears it to NULL.
 285  */
 286 static void
 287 check_job_size_and_unref (EvPixbufCache *pixbuf_cache,
 288                           CacheJobInfo *job_info,
 289                           EvPageCache  *page_cache,
 290                           gfloat        scale)
 291 {
 292         gint width;
 293         gint height;
 294
 295         g_assert (job_info);
 296
 297         if (job_info->job == NULL)
 298                 return;
 299
 300         ev_page_cache_get_size (page_cache,
 301                                 EV_JOB_RENDER (job_info->job)->page,
 302                                 EV_JOB_RENDER (job_info->job)->rotation,
 303                                 scale,
 304                                 &width, &height);
 305
 306         if (width == EV_JOB_RENDER (job_info->job)->target_width &&
 307             height == EV_JOB_RENDER (job_info->job)->target_height)
 308                 return;
 309
 310         g_signal_handlers_disconnect_by_func (job_info->job,
 311                                               G_CALLBACK (job_page_ready_cb),
 312                                               pixbuf_cache);
 313         g_signal_handlers_disconnect_by_func (job_info->job,
 314                                               G_CALLBACK (job_finished_cb),
 315                                               pixbuf_cache);
 316         ev_job_cancel (job_info->job);
 317         g_object_unref (job_info->job);
 318         job_info->job = NULL;
 319 }
 320
 321 /* Do all function that copies a job from an older cache to it's position in the
 322  * new cache.  It clears the old job if it doesn't have a place.
 323  */
 324 static void
 325 move_one_job (CacheJobInfo  *job_info,
 326               EvPixbufCache *pixbuf_cache,
 327               int            page,
 328               CacheJobInfo  *new_job_list,
 329               CacheJobInfo  *new_prev_job,
 330               CacheJobInfo  *new_next_job,
 331               int            start_page,
 332               int            end_page,
 333               gint           priority)
 334 {
 335         CacheJobInfo *target_page = NULL;
 336         int page_offset;
 337         gint new_priority;
 338
 339         if (page < (start_page - pixbuf_cache->preload_cache_size) ||
 340             page > (end_page + pixbuf_cache->preload_cache_size)) {
 341                 dispose_cache_job_info (job_info, pixbuf_cache);
 342                 return;
 343         }
 344
 345         /* find the target page to copy it over to. */
 346         if (page < start_page) {
 347                 page_offset = (page - (start_page - pixbuf_cache->preload_cache_size));
 348
 349                 g_assert (page_offset >= 0 &&
 350                           page_offset < pixbuf_cache->preload_cache_size);
 351                 target_page = new_prev_job + page_offset;
 352                 new_priority = EV_JOB_PRIORITY_LOW;
 353         } else if (page > end_page) {
 354                 page_offset = (page - (end_page + 1));
 355
 356                 g_assert (page_offset >= 0 &&
 357                           page_offset < pixbuf_cache->preload_cache_size);
 358                 target_page = new_next_job + page_offset;
 359                 new_priority = EV_JOB_PRIORITY_LOW;
 360         } else {
 361                 page_offset = page - start_page;
 362                 g_assert (page_offset >= 0 &&
 363                           page_offset <= ((end_page - start_page) + 1));
 364                 new_priority = EV_JOB_PRIORITY_URGENT;
 365                 target_page = new_job_list + page_offset;
 366         }
 367
 368         *target_page = *job_info;
 369         job_info->job = NULL;
 370         job_info->region = NULL;
 371         job_info->surface = NULL;
 372         job_info->link_mapping = NULL;
 373         job_info->image_mapping = NULL;
 374         job_info->form_field_mapping = NULL;
 375
 376         if (new_priority != priority && target_page->job) {
 377                 ev_job_scheduler_update_job (target_page->job, new_priority);
 378         }
 379 }
 380
 381 static void
 382 ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
 383                               gint           start_page,
 384                               gint           end_page)
 385 {
 386         CacheJobInfo *new_job_list;
 387         CacheJobInfo *new_prev_job;
 388         CacheJobInfo *new_next_job;
 389         EvPageCache *page_cache;
 390         int i, page;
 391
 392         if (pixbuf_cache->start_page == start_page &&
 393             pixbuf_cache->end_page == end_page)
 394                 return;
 395
 396         page_cache = ev_page_cache_get (pixbuf_cache->document);
 397
 398         new_job_list = g_new0 (CacheJobInfo, (end_page - start_page) + 1);
 399         new_prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 400         new_next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 401
 402         /* We go through each job in the old cache and either clear it or move
 403          * it to a new location. */
 404
 405         /* Start with the prev cache. */
 406         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 407         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 408                 if (page < 0) {
 409                         dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 410                 } else {
 411                         move_one_job (pixbuf_cache->prev_job + i,
 412                                       pixbuf_cache, page,
 413                                       new_job_list, new_prev_job, new_next_job,
 414                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 415                 }
 416                 page ++;
 417         }
 418
 419         page = pixbuf_cache->start_page;
 420         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 421                 move_one_job (pixbuf_cache->job_list + i,
 422                               pixbuf_cache, page,
 423                               new_job_list, new_prev_job, new_next_job,
 424                               start_page, end_page, EV_JOB_PRIORITY_URGENT);
 425                 page ++;
 426         }
 427
 428         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 429                 if (page >= ev_page_cache_get_n_pages (page_cache)) {
 430                         dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 431                 } else {
 432                         move_one_job (pixbuf_cache->next_job + i,
 433                                       pixbuf_cache, page,
 434                                       new_job_list, new_prev_job, new_next_job,
 435                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 436                 }
 437                 page ++;
 438         }
 439
 440         g_free (pixbuf_cache->job_list);
 441         g_free (pixbuf_cache->prev_job);
 442         g_free (pixbuf_cache->next_job);
 443
 444         pixbuf_cache->job_list = new_job_list;
 445         pixbuf_cache->prev_job = new_prev_job;
 446         pixbuf_cache->next_job = new_next_job;
 447
 448         pixbuf_cache->start_page = start_page;
 449         pixbuf_cache->end_page = end_page;
 450 }
 451
 452 static void
 453 copy_job_page_and_selection_to_job_info (EvJobRender   *job_render,
 454                                          CacheJobInfo  *job_info,
 455                                          EvPixbufCache *pixbuf_cache)
 456 {
 457         if (job_info->rc == NULL) {
 458                 job_info->rc = ev_render_context_new (job_render->ev_page,
 459                                                       job_render->rotation,
 460                                                       job_render->scale);
 461         } else {
 462                 ev_render_context_set_page (job_info->rc, job_render->ev_page);
 463                 ev_render_context_set_rotation (job_info->rc, job_render->rotation);
 464                 ev_render_context_set_scale (job_info->rc, job_render->scale);
 465         }
 466
 467         if (job_info->surface) {
 468                 cairo_surface_destroy (job_info->surface);
 469         }
 470         job_info->surface = cairo_surface_reference (job_render->surface);
 471
 472         job_info->points_set = FALSE;
 473         if (job_render->flags & EV_RENDER_INCLUDE_SELECTION) {
 474                 if (job_info->selection) {
 475                         cairo_surface_destroy (job_info->selection);
 476                         job_info->selection = NULL;
 477                 }
 478                 if (job_info->selection_region) {
 479                         gdk_region_destroy (job_info->selection_region);
 480                         job_info->selection_region = NULL;
 481                 }
 482
 483                 job_info->selection_points = job_render->selection_points;
 484                 job_info->selection_region = gdk_region_copy (job_render->selection_region);
 485                 job_info->selection = cairo_surface_reference (job_render->selection);
 486                 g_assert (job_info->selection_points.x1 >= 0);
 487                 job_info->points_set = TRUE;
 488         }
 489
 490         if (job_info->job) {
 491                 g_signal_handlers_disconnect_by_func (job_info->job,
 492                                                       G_CALLBACK (job_page_ready_cb),
 493                                                       pixbuf_cache);
 494         }
 495
 496         job_info->page_ready = TRUE;
 497 }
 498
 499 static void
 500 copy_job_to_job_info (EvJobRender   *job_render,
 501                       CacheJobInfo  *job_info,
 502                       EvPixbufCache *pixbuf_cache)
 503 {
 504         if (!job_info->page_ready) {
 505                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 506                 copy_job_page_and_selection_to_job_info (job_render,
 507                                                          job_info,
 508                                                          pixbuf_cache);
 509         }
 510
 511         if (job_render->flags & EV_RENDER_INCLUDE_LINKS) {
 512                 if (job_info->link_mapping)
 513                         ev_link_mapping_free (job_info->link_mapping);
 514                 job_info->link_mapping = job_render->link_mapping;
 515         }
 516
 517         if (job_render->flags & EV_RENDER_INCLUDE_IMAGES) {
 518                 if (job_info->image_mapping)
 519                         ev_image_mapping_free (job_info->image_mapping);
 520                 job_info->image_mapping = job_render->image_mapping;
 521         }
 522
 523         if (job_render->flags & EV_RENDER_INCLUDE_FORMS) {
 524                 if (job_info->form_field_mapping)
 525                         ev_form_field_mapping_free (job_info->form_field_mapping);
 526                 job_info->form_field_mapping = job_render->form_field_mapping;
 527         }
 528
 529         if (job_render->flags & EV_RENDER_INCLUDE_TEXT) {
 530                 if (job_info->text_mapping)
 531                         gdk_region_destroy (job_info->text_mapping);
 532                 job_info->text_mapping = job_render->text_mapping;
 533         }
 534
 535         if (job_info->job) {
 536                 g_signal_handlers_disconnect_by_func (job_info->job,
 537                                                       G_CALLBACK (job_finished_cb),
 538                                                       pixbuf_cache);
 539                 ev_job_cancel (job_info->job);
 540                 g_object_unref (job_info->job);
 541                 job_info->job = NULL;
 542         }
 543 }
 544
 545 static CacheJobInfo *
 546 find_job_cache (EvPixbufCache *pixbuf_cache,
 547                 int            page)
 548 {
 549         int page_offset;
 550
 551         if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
 552             page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
 553                 return NULL;
 554
 555         if (page < pixbuf_cache->start_page) {
 556                 page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
 557
 558                 g_assert (page_offset >= 0 &&
 559                           page_offset < pixbuf_cache->preload_cache_size);
 560                 return pixbuf_cache->prev_job + page_offset;
 561         }
 562
 563         if (page > pixbuf_cache->end_page) {
 564                 page_offset = (page - (pixbuf_cache->end_page + 1));
 565
 566                 g_assert (page_offset >= 0 &&
 567                           page_offset < pixbuf_cache->preload_cache_size);
 568                 return pixbuf_cache->next_job + page_offset;
 569         }
 570
 571         page_offset = page - pixbuf_cache->start_page;
 572         g_assert (page_offset >= 0 &&
 573                   page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
 574         return pixbuf_cache->job_list + page_offset;
 575 }
 576
 577 static void
 578 ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
 579                                  gfloat         scale)
 580 {
 581         EvPageCache *page_cache;
 582         int i;
 583
 584         page_cache = ev_page_cache_get (pixbuf_cache->document);
 585
 586         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 587                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, page_cache, scale);
 588         }
 589
 590         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 591                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, page_cache, scale);
 592                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, page_cache, scale);
 593         }
 594 }
 595
 596 static void
 597 get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
 598 {
 599     if (GTK_WIDGET_HAS_FOCUS (widget)) {
 600         *text = &widget->style->text [GTK_STATE_SELECTED];
 601         *base = &widget->style->base [GTK_STATE_SELECTED];
 602     } else {
 603         *text = &widget->style->text [GTK_STATE_ACTIVE];
 604         *base = &widget->style->base [GTK_STATE_ACTIVE];
 605     }
 606 }
 607
 608 static void
 609 add_job (EvPixbufCache *pixbuf_cache,
 610          CacheJobInfo  *job_info,
 611          EvPageCache   *page_cache,
 612          GdkRegion     *region,
 613          gint           width,
 614          gint           height,
 615          gint           page,
 616          gint           rotation,
 617          gfloat         scale,
 618          EvJobPriority  priority)
 619 {
 620         EvRenderFlags flags = 0;
 621
 622         job_info->page_ready = FALSE;
 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                 flags |= EV_RENDER_INCLUDE_LINKS;
 631         if (job_info->image_mapping == NULL)
 632                 flags |= EV_RENDER_INCLUDE_IMAGES;
 633         if (job_info->form_field_mapping == NULL)
 634                 flags |= EV_RENDER_INCLUDE_FORMS;
 635         if (job_info->text_mapping == NULL)
 636                 flags |= EV_RENDER_INCLUDE_TEXT;
 637
 638         job_info->job = ev_job_render_new (pixbuf_cache->document,
 639                                            page, rotation, scale,
 640                                            width, height,
 641                                            flags);
 642
 643         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 644                 GdkColor *text, *base;
 645
 646                 gtk_widget_ensure_style (pixbuf_cache->view);
 647                 get_selection_colors (pixbuf_cache->view, &text, &base);
 648                 ev_job_render_set_selection_info (EV_JOB_RENDER (job_info->job),
 649                                                   &(job_info->target_points),
 650                                                   job_info->selection_style,
 651                                                   text, base);
 652         }
 653
 654         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 655                           G_CALLBACK (job_page_ready_cb),
 656                           pixbuf_cache);
 657         g_signal_connect (G_OBJECT (job_info->job), "finished",
 658                           G_CALLBACK (job_finished_cb),
 659                           pixbuf_cache);
 660         ev_job_scheduler_push_job (job_info->job, priority);
 661 }
 662
 663 static void
 664 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 665                    CacheJobInfo  *job_info,
 666                    EvPageCache   *page_cache,
 667                    gint           page,
 668                    gint           rotation,
 669                    gfloat         scale,
 670                    EvJobPriority  priority)
 671 {
 672         gint width, height;
 673
 674         if (job_info->job)
 675                 return;
 676
 677         ev_page_cache_get_size (page_cache, page, rotation,
 678                                 scale, &width, &height);
 679
 680         if (job_info->surface &&
 681             cairo_image_surface_get_width (job_info->surface) == width &&
 682             cairo_image_surface_get_height (job_info->surface) == height)
 683                 return;
 684
 685         add_job (pixbuf_cache, job_info, page_cache, NULL,
 686                  width, height, page, rotation, scale,
 687                  priority);
 688 }
 689
 690 static void
 691 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 692                                     gint           rotation,
 693                                     gfloat         scale)
 694 {
 695         EvPageCache *page_cache;
 696         CacheJobInfo *job_info;
 697         int page;
 698         int i;
 699
 700         page_cache = ev_page_cache_get (pixbuf_cache->document);
 701
 702         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 703                 job_info = (pixbuf_cache->job_list + i);
 704                 page = pixbuf_cache->start_page + i;
 705
 706                 add_job_if_needed (pixbuf_cache, job_info,
 707                                    page_cache, page, rotation, scale,
 708                                    EV_JOB_PRIORITY_URGENT);
 709         }
 710
 711         for (i = FIRST_VISIBLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 712                 job_info = (pixbuf_cache->prev_job + i);
 713                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 714
 715                 add_job_if_needed (pixbuf_cache, job_info,
 716                                    page_cache, page, rotation, scale,
 717                                    EV_JOB_PRIORITY_LOW);
 718         }
 719
 720         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 721                 job_info = (pixbuf_cache->next_job + i);
 722                 page = pixbuf_cache->end_page + 1 + i;
 723
 724                 add_job_if_needed (pixbuf_cache, job_info,
 725                                    page_cache, page, rotation, scale,
 726                                    EV_JOB_PRIORITY_LOW);
 727         }
 728
 729 }
 730
 731 void
 732 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 733                                 gint            start_page,
 734                                 gint            end_page,
 735                                 gint            rotation,
 736                                 gfloat          scale,
 737                                 GList          *selection_list)
 738 {
 739         EvPageCache *page_cache;
 740
 741         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 742
 743         page_cache = ev_page_cache_get (pixbuf_cache->document);
 744
 745         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 746         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 747         g_return_if_fail (end_page >= start_page);
 748
 749         /* First, resize the page_range as needed.  We cull old pages
 750          * mercilessly. */
 751         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 752
 753         /* Then, we update the current jobs to see if any of them are the wrong
 754          * size, we remove them if we need to. */
 755         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 756
 757         /* Next, we update the target selection for our pages */
 758         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 759
 760         /* Finally, we add the new jobs for all the sizes that don't have a
 761          * pixbuf */
 762         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 763 }
 764
 765 cairo_surface_t *
 766 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 767                              gint           page)
 768 {
 769         CacheJobInfo *job_info;
 770
 771         job_info = find_job_cache (pixbuf_cache, page);
 772         if (job_info == NULL)
 773                 return NULL;
 774
 775         if (job_info->page_ready)
 776                 return job_info->surface;
 777
 778         /* We don't need to wait for the idle to handle the callback */
 779         if (job_info->job &&
 780             EV_JOB_RENDER (job_info->job)->page_ready) {
 781                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 782                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 783         }
 784
 785         return job_info->surface;
 786 }
 787
 788 GList *
 789 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 790                                   gint           page)
 791 {
 792         CacheJobInfo *job_info;
 793
 794         job_info = find_job_cache (pixbuf_cache, page);
 795         if (job_info == NULL)
 796                 return NULL;
 797
 798         /* We don't need to wait for the idle to handle the callback */
 799         if (job_info->job &&
 800             EV_JOB (job_info->job)->finished) {
 801                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 802         }
 803
 804         return job_info->link_mapping;
 805 }
 806
 807 GList *
 808 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 809                                    gint           page)
 810 {
 811         CacheJobInfo *job_info;
 812
 813         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 814                 return NULL;
 815
 816         job_info = find_job_cache (pixbuf_cache, page);
 817         if (job_info == NULL)
 818                 return NULL;
 819
 820         /* We don't need to wait for the idle to handle the callback */
 821         if (job_info->job &&
 822             EV_JOB (job_info->job)->finished) {
 823                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 824         }
 825
 826         return job_info->image_mapping;
 827 }
 828
 829 GList *
 830 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 831                                         gint           page)
 832 {
 833         CacheJobInfo *job_info;
 834
 835         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 836                 return NULL;
 837
 838         job_info = find_job_cache (pixbuf_cache, page);
 839         if (job_info == NULL)
 840                 return NULL;
 841
 842         /* We don't need to wait for the idle to handle the callback */
 843         if (job_info->job &&
 844            EV_JOB (job_info->job)->finished) {
 845                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 846         }
 847
 848         return job_info->form_field_mapping;
 849 }
 850
 851 static gboolean
 852 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 853                               CacheJobInfo  *job_info,
 854                               gint           page,
 855                               gfloat         scale)
 856 {
 857         EvPageCache *page_cache;
 858
 859         if (job_info->selection && job_info->rc) {
 860                 gint width, height;
 861                 gint selection_width, selection_height;
 862
 863                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 864                 ev_page_cache_get_size (page_cache, page,
 865                                         job_info->rc->rotation,
 866                                         scale, &width, &height);
 867
 868                 selection_width = cairo_image_surface_get_width (job_info->selection);
 869                 selection_height = cairo_image_surface_get_height (job_info->selection);
 870
 871                 if (width != selection_width || height != selection_height)
 872                         return TRUE;
 873         } else {
 874                 if (job_info->points_set)
 875                         return TRUE;
 876         }
 877
 878         return FALSE;
 879 }
 880
 881 static void
 882 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 883                            CacheJobInfo  *job_info,
 884                            gint           page,
 885                            gfloat         scale)
 886 {
 887         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 888                 if (job_info->selection)
 889                         cairo_surface_destroy (job_info->selection);
 890                 job_info->selection = NULL;
 891                 job_info->selection_points.x1 = -1;
 892         }
 893 }
 894
 895 GdkRegion *
 896 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 897                                   gint           page)
 898 {
 899         CacheJobInfo *job_info;
 900
 901         job_info = find_job_cache (pixbuf_cache, page);
 902         if (job_info == NULL)
 903                 return NULL;
 904
 905         /* We don't need to wait for the idle to handle the callback */
 906         if (job_info->job &&
 907             EV_JOB (job_info->job)->finished) {
 908                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 909         }
 910
 911         return job_info->text_mapping;
 912 }
 913
 914 /* Clears the cache of jobs and pixbufs.
 915  */
 916 void
 917 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 918 {
 919         int i;
 920
 921         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 922                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 923                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 924         }
 925
 926         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 927                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 928         }
 929 }
 930
 931
 932 void
 933 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 934 {
 935         gint i;
 936
 937         /* FIXME: doesn't update running jobs. */
 938         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 939                 CacheJobInfo *job_info;
 940
 941                 job_info = pixbuf_cache->prev_job + i;
 942                 if (job_info->selection) {
 943                         cairo_surface_destroy (job_info->selection);
 944                         job_info->selection = NULL;
 945                 }
 946
 947                 job_info = pixbuf_cache->next_job + i;
 948                 if (job_info->selection) {
 949                         cairo_surface_destroy (job_info->selection);
 950                         job_info->selection = NULL;
 951                 }
 952         }
 953
 954         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 955                 CacheJobInfo *job_info;
 956
 957                 job_info = pixbuf_cache->job_list + i;
 958                 if (job_info->selection) {
 959                         cairo_surface_destroy (job_info->selection);
 960                         job_info->selection = NULL;
 961                 }
 962         }
 963 }
 964
 965 cairo_surface_t *
 966 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 967                                        gint            page,
 968                                        gfloat          scale,
 969                                        GdkRegion     **region)
 970 {
 971         CacheJobInfo *job_info;
 972
 973         /* the document does not implement the selection interface */
 974         if (!EV_IS_SELECTION (pixbuf_cache->document))
 975                 return NULL;
 976
 977         job_info = find_job_cache (pixbuf_cache, page);
 978         if (job_info == NULL)
 979                 return NULL;
 980
 981         /* No selection on this page */
 982         if (!job_info->points_set)
 983                 return NULL;
 984
 985         /* Create new render context if needed (selection + fast scrolling) */
 986         if (job_info->rc == NULL) {
 987                 EvPage  *ev_page;
 988                 ev_page = ev_document_get_page (pixbuf_cache->document, page);
 989                 job_info->rc = ev_render_context_new (ev_page, 0, scale);
 990                 g_object_unref (ev_page);
 991         }
 992
 993         /* Update the rc */
 994         ev_render_context_set_scale (job_info->rc, scale);
 995
 996         /* If we have a running job, we just return what we have under the
 997          * assumption that it'll be updated later and we can scale it as need
 998          * be */
 999         if (job_info->job && (EV_JOB_RENDER (job_info->job)->flags & EV_RENDER_INCLUDE_SELECTION))
1000                 return job_info->selection;
1001
1002         /* Now, lets see if we need to resize the image.  If we do, we clear the
1003          * old one. */
1004         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
1005
1006         /* Finally, we see if the two scales are the same, and get a new pixbuf
1007          * if needed.  We do this synchronously for now.  At some point, we
1008          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1009          * doesn't kill us.  Rendering a few glyphs should really be fast.
1010          */
1011         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1012                 EvRectangle *old_points;
1013                 GdkColor *text, *base;
1014
1015                 /* we need to get a new selection pixbuf */
1016                 ev_document_doc_mutex_lock ();
1017                 if (job_info->selection_points.x1 < 0) {
1018                         g_assert (job_info->selection == NULL);
1019                         old_points = NULL;
1020                 } else {
1021                         g_assert (job_info->selection != NULL);
1022                         old_points = &(job_info->selection_points);
1023                 }
1024
1025                 if (job_info->selection_region)
1026                         gdk_region_destroy (job_info->selection_region);
1027                 job_info->selection_region =
1028                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1029                                                            job_info->rc,
1030                                                            job_info->selection_style,
1031                                                            &(job_info->target_points));
1032
1033                 gtk_widget_ensure_style (pixbuf_cache->view);
1034
1035                 get_selection_colors (pixbuf_cache->view, &text, &base);
1036
1037                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1038                                                job_info->rc, &(job_info->selection),
1039                                                &(job_info->target_points),
1040                                                old_points,
1041                                                job_info->selection_style,
1042                                                text, base);
1043                 job_info->selection_points = job_info->target_points;
1044                 ev_document_doc_mutex_unlock ();
1045         }
1046         if (region)
1047                 *region = job_info->selection_region;
1048         return job_info->selection;
1049 }
1050
1051 static void
1052 update_job_selection (CacheJobInfo    *job_info,
1053                       EvViewSelection *selection)
1054 {
1055         job_info->points_set = TRUE;
1056         job_info->target_points = selection->rect;
1057         job_info->selection_style = selection->style;
1058 }
1059
1060 static void
1061 clear_job_selection (CacheJobInfo *job_info)
1062 {
1063         job_info->points_set = FALSE;
1064         job_info->selection_points.x1 = -1;
1065
1066         if (job_info->selection) {
1067                 cairo_surface_destroy (job_info->selection);
1068                 job_info->selection = NULL;
1069         }
1070 }
1071
1072 /* This function will reset the selection on pages that no longer have them, and
1073  * will update the target_selection on those that need it.  It will _not_ free
1074  * the previous selection_list -- that's up to caller to do.
1075  */
1076 void
1077 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1078                                     GList         *selection_list)
1079 {
1080         EvPageCache *page_cache;
1081         EvViewSelection *selection;
1082         GList *list = selection_list;
1083         int page;
1084         int i;
1085
1086         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1087
1088         if (!EV_IS_SELECTION (pixbuf_cache->document))
1089                 return;
1090
1091         page_cache = ev_page_cache_get (pixbuf_cache->document);
1092
1093         /* We check each area to see what needs updating, and what needs freeing; */
1094         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1095         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1096                 if (page < 0) {
1097                         page ++;
1098                         continue;
1099                 }
1100
1101                 selection = NULL;
1102                 while (list) {
1103                         if (((EvViewSelection *)list->data)->page == page) {
1104                                 selection = list->data;
1105                                 break;
1106                         } else if (((EvViewSelection *)list->data)->page > page)
1107                                 break;
1108                         list = list->next;
1109                 }
1110
1111                 if (selection)
1112                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1113                 else
1114                         clear_job_selection (pixbuf_cache->prev_job + i);
1115                 page ++;
1116         }
1117
1118         page = pixbuf_cache->start_page;
1119         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1120                 selection = NULL;
1121                 while (list) {
1122                         if (((EvViewSelection *)list->data)->page == page) {
1123                                 selection = list->data;
1124                                 break;
1125                         } else if (((EvViewSelection *)list->data)->page > page)
1126                                 break;
1127                         list = list->next;
1128                 }
1129
1130                 if (selection)
1131                         update_job_selection (pixbuf_cache->job_list + i, selection);
1132                 else
1133                         clear_job_selection (pixbuf_cache->job_list + i);
1134                 page ++;
1135         }
1136
1137         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1138                 if (page >= ev_page_cache_get_n_pages (page_cache))
1139                         break;
1140
1141                 selection = NULL;
1142                 while (list) {
1143                         if (((EvViewSelection *)list->data)->page == page) {
1144                                 selection = list->data;
1145                                 break;
1146                         } else if (((EvViewSelection *)list->data)->page > page)
1147                                 break;
1148                         list = list->next;
1149                 }
1150
1151                 if (selection)
1152                         update_job_selection (pixbuf_cache->next_job + i, selection);
1153                 else
1154                         clear_job_selection (pixbuf_cache->next_job + i);
1155                 page ++;
1156         }
1157 }
1158
1159
1160 /* Returns what the pixbuf cache thinks is */
1161
1162 GList *
1163 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1164 {
1165         EvPageCache *page_cache;
1166         EvViewSelection *selection;
1167         GList *retval = NULL;
1168         int page;
1169         int i;
1170
1171         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1172
1173         page_cache = ev_page_cache_get (pixbuf_cache->document);
1174
1175         /* We check each area to see what needs updating, and what needs freeing; */
1176         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1177         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1178                 if (page < 0) {
1179                         page ++;
1180                         continue;
1181                 }
1182
1183                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1184                         selection = g_new0 (EvViewSelection, 1);
1185                         selection->page = page;
1186                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1187                         if (pixbuf_cache->prev_job[i].selection_region)
1188                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1189                         retval = g_list_append (retval, selection);
1190                 }
1191
1192                 page ++;
1193         }
1194
1195         page = pixbuf_cache->start_page;
1196         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1197                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1198                         selection = g_new0 (EvViewSelection, 1);
1199                         selection->page = page;
1200                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1201                         if (pixbuf_cache->job_list[i].selection_region)
1202                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1203                         retval = g_list_append (retval, selection);
1204                 }
1205
1206                 page ++;
1207         }
1208
1209         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1210                 if (page >= ev_page_cache_get_n_pages (page_cache))
1211                         break;
1212
1213                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1214                         selection = g_new0 (EvViewSelection, 1);
1215                         selection->page = page;
1216                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1217                         if (pixbuf_cache->next_job[i].selection_region)
1218                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1219                         retval = g_list_append (retval, selection);
1220                 }
1221
1222                 page ++;
1223         }
1224
1225         return retval;
1226 }
1227
1228 void
1229 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1230                              GdkRegion     *region,
1231                              gint           page,
1232                              gint           rotation,
1233                              gdouble        scale)
1234 {
1235         CacheJobInfo *job_info;
1236         EvPageCache *page_cache;
1237         gint width, height;
1238
1239         job_info = find_job_cache (pixbuf_cache, page);
1240         if (job_info == NULL)
1241                 return;
1242
1243         page_cache = ev_page_cache_get (pixbuf_cache->document);
1244         ev_page_cache_get_size (page_cache, page, rotation, scale,
1245                                 &width, &height);
1246
1247         add_job (pixbuf_cache, job_info, page_cache, region,
1248                  width, height, page, rotation, scale,
1249                  EV_JOB_PRIORITY_URGENT);
1250 }
1251
1252