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