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                 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 #define FIRST_VISABLE_PREV(pixbuf_cache) \
 597         (MAX (0, pixbuf_cache->preload_cache_size + 1 - pixbuf_cache->start_page))
 598
 599 static void
 600 get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
 601 {
 602     if (GTK_WIDGET_HAS_FOCUS (widget)) {
 603         *text = &widget->style->text [GTK_STATE_SELECTED];
 604         *base = &widget->style->base [GTK_STATE_SELECTED];
 605     } else {
 606         *text = &widget->style->text [GTK_STATE_ACTIVE];
 607         *base = &widget->style->base [GTK_STATE_ACTIVE];
 608     }
 609 }
 610
 611 static void
 612 add_job (EvPixbufCache *pixbuf_cache,
 613          CacheJobInfo  *job_info,
 614          EvPageCache   *page_cache,
 615          GdkRegion     *region,
 616          gint           width,
 617          gint           height,
 618          gint           page,
 619          gint           rotation,
 620          gfloat         scale,
 621          EvJobPriority  priority)
 622 {
 623         EvRenderFlags flags = 0;
 624
 625         job_info->page_ready = FALSE;
 626
 627         if (job_info->region)
 628                 gdk_region_destroy (job_info->region);
 629         job_info->region = region ? gdk_region_copy (region) : NULL;
 630
 631         /* Figure out what else we need for this job */
 632         if (job_info->link_mapping == NULL)
 633                 flags |= EV_RENDER_INCLUDE_LINKS;
 634         if (job_info->image_mapping == NULL)
 635                 flags |= EV_RENDER_INCLUDE_IMAGES;
 636         if (job_info->form_field_mapping == NULL)
 637                 flags |= EV_RENDER_INCLUDE_FORMS;
 638         if (job_info->text_mapping == NULL)
 639                 flags |= EV_RENDER_INCLUDE_TEXT;
 640
 641         job_info->job = ev_job_render_new (pixbuf_cache->document,
 642                                            page, rotation, scale,
 643                                            width, height,
 644                                            flags);
 645
 646         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 647                 GdkColor *text, *base;
 648
 649                 gtk_widget_ensure_style (pixbuf_cache->view);
 650                 get_selection_colors (pixbuf_cache->view, &text, &base);
 651                 ev_job_render_set_selection_info (EV_JOB_RENDER (job_info->job),
 652                                                   &(job_info->target_points),
 653                                                   job_info->selection_style,
 654                                                   text, base);
 655         }
 656
 657         g_signal_connect (G_OBJECT (job_info->job), "page-ready",
 658                           G_CALLBACK (job_page_ready_cb),
 659                           pixbuf_cache);
 660         g_signal_connect (G_OBJECT (job_info->job), "finished",
 661                           G_CALLBACK (job_finished_cb),
 662                           pixbuf_cache);
 663         ev_job_scheduler_push_job (job_info->job, priority);
 664 }
 665
 666 static void
 667 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 668                    CacheJobInfo  *job_info,
 669                    EvPageCache   *page_cache,
 670                    gint           page,
 671                    gint           rotation,
 672                    gfloat         scale,
 673                    EvJobPriority  priority)
 674 {
 675         gint width, height;
 676
 677         if (job_info->job)
 678                 return;
 679
 680         ev_page_cache_get_size (page_cache, page, rotation,
 681                                 scale, &width, &height);
 682
 683         if (job_info->surface &&
 684             cairo_image_surface_get_width (job_info->surface) == width &&
 685             cairo_image_surface_get_height (job_info->surface) == height)
 686                 return;
 687
 688         add_job (pixbuf_cache, job_info, page_cache, NULL,
 689                  width, height, page, rotation, scale,
 690                  priority);
 691 }
 692
 693 static void
 694 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 695                                     gint           rotation,
 696                                     gfloat         scale)
 697 {
 698         EvPageCache *page_cache;
 699         CacheJobInfo *job_info;
 700         int page;
 701         int i;
 702
 703         page_cache = ev_page_cache_get (pixbuf_cache->document);
 704
 705         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 706                 job_info = (pixbuf_cache->job_list + i);
 707                 page = pixbuf_cache->start_page + i;
 708
 709                 add_job_if_needed (pixbuf_cache, job_info,
 710                                    page_cache, page, rotation, scale,
 711                                    EV_JOB_PRIORITY_URGENT);
 712         }
 713
 714         for (i = FIRST_VISABLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 715                 job_info = (pixbuf_cache->prev_job + i);
 716                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 717
 718                 add_job_if_needed (pixbuf_cache, job_info,
 719                                    page_cache, page, rotation, scale,
 720                                    EV_JOB_PRIORITY_LOW);
 721         }
 722
 723         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
 724                 job_info = (pixbuf_cache->next_job + i);
 725                 page = pixbuf_cache->end_page + 1 + i;
 726
 727                 add_job_if_needed (pixbuf_cache, job_info,
 728                                    page_cache, page, rotation, scale,
 729                                    EV_JOB_PRIORITY_LOW);
 730         }
 731
 732 }
 733
 734 void
 735 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 736                                 gint            start_page,
 737                                 gint            end_page,
 738                                 gint            rotation,
 739                                 gfloat          scale,
 740                                 GList          *selection_list)
 741 {
 742         EvPageCache *page_cache;
 743
 744         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 745
 746         page_cache = ev_page_cache_get (pixbuf_cache->document);
 747
 748         g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
 749         g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
 750         g_return_if_fail (end_page >= start_page);
 751
 752         /* First, resize the page_range as needed.  We cull old pages
 753          * mercilessly. */
 754         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 755
 756         /* Then, we update the current jobs to see if any of them are the wrong
 757          * size, we remove them if we need to. */
 758         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 759
 760         /* Next, we update the target selection for our pages */
 761         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 762
 763         /* Finally, we add the new jobs for all the sizes that don't have a
 764          * pixbuf */
 765         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 766 }
 767
 768 cairo_surface_t *
 769 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 770                              gint           page)
 771 {
 772         CacheJobInfo *job_info;
 773
 774         job_info = find_job_cache (pixbuf_cache, page);
 775         if (job_info == NULL)
 776                 return NULL;
 777
 778         if (job_info->page_ready)
 779                 return job_info->surface;
 780
 781         /* We don't need to wait for the idle to handle the callback */
 782         if (job_info->job &&
 783             EV_JOB_RENDER (job_info->job)->page_ready) {
 784                 copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 785                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 786         }
 787
 788         return job_info->surface;
 789 }
 790
 791 GList *
 792 ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
 793                                   gint           page)
 794 {
 795         CacheJobInfo *job_info;
 796
 797         job_info = find_job_cache (pixbuf_cache, page);
 798         if (job_info == NULL)
 799                 return NULL;
 800
 801         /* We don't need to wait for the idle to handle the callback */
 802         if (job_info->job &&
 803             EV_JOB (job_info->job)->finished) {
 804                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 805         }
 806
 807         return job_info->link_mapping;
 808 }
 809
 810 GList *
 811 ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
 812                                    gint           page)
 813 {
 814         CacheJobInfo *job_info;
 815
 816         if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
 817                 return NULL;
 818
 819         job_info = find_job_cache (pixbuf_cache, page);
 820         if (job_info == NULL)
 821                 return NULL;
 822
 823         /* We don't need to wait for the idle to handle the callback */
 824         if (job_info->job &&
 825             EV_JOB (job_info->job)->finished) {
 826                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 827         }
 828
 829         return job_info->image_mapping;
 830 }
 831
 832 GList *
 833 ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
 834                                         gint           page)
 835 {
 836         CacheJobInfo *job_info;
 837
 838         if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
 839                 return NULL;
 840
 841         job_info = find_job_cache (pixbuf_cache, page);
 842         if (job_info == NULL)
 843                 return NULL;
 844
 845         /* We don't need to wait for the idle to handle the callback */
 846         if (job_info->job &&
 847            EV_JOB (job_info->job)->finished) {
 848                 copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
 849         }
 850
 851         return job_info->form_field_mapping;
 852 }
 853
 854 static gboolean
 855 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 856                               CacheJobInfo  *job_info,
 857                               gint           page,
 858                               gfloat         scale)
 859 {
 860         EvPageCache *page_cache;
 861
 862         if (job_info->selection) {
 863                 gint width, height;
 864                 gint selection_width, selection_height;
 865
 866                 page_cache = ev_page_cache_get (pixbuf_cache->document);
 867                 ev_page_cache_get_size (page_cache, page,
 868                                         job_info->rc->rotation,
 869                                         scale, &width, &height);
 870
 871                 selection_width = cairo_image_surface_get_width (job_info->selection);
 872                 selection_height = cairo_image_surface_get_height (job_info->selection);
 873
 874                 if (width != selection_width || height != selection_height)
 875                         return TRUE;
 876         } else {
 877                 if (job_info->points_set)
 878                         return TRUE;
 879         }
 880
 881         return FALSE;
 882 }
 883
 884 static void
 885 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 886                            CacheJobInfo  *job_info,
 887                            gint           page,
 888                            gfloat         scale)
 889 {
 890         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 891                 if (job_info->selection)
 892                         cairo_surface_destroy (job_info->selection);
 893                 job_info->selection = NULL;
 894                 job_info->selection_points.x1 = -1;
 895         }
 896 }
 897
 898 GdkRegion *
 899 ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
 900                                   gint           page)
 901 {
 902         CacheJobInfo *job_info;
 903
 904         job_info = find_job_cache (pixbuf_cache, page);
 905         if (job_info == NULL)
 906                 return NULL;
 907
 908         /* We don't need to wait for the idle to handle the callback */
 909         if (job_info->job &&
 910             EV_JOB (job_info->job)->finished) {
 911                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 912         }
 913
 914         return job_info->text_mapping;
 915 }
 916
 917 /* Clears the cache of jobs and pixbufs.
 918  */
 919 void
 920 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 921 {
 922         int i;
 923
 924         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 925                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 926                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 927         }
 928
 929         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 930                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 931         }
 932 }
 933
 934
 935 void
 936 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 937 {
 938         gint i;
 939
 940         /* FIXME: doesn't update running jobs. */
 941         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 942                 CacheJobInfo *job_info;
 943
 944                 job_info = pixbuf_cache->prev_job + i;
 945                 if (job_info->selection) {
 946                         cairo_surface_destroy (job_info->selection);
 947                         job_info->selection = NULL;
 948                 }
 949
 950                 job_info = pixbuf_cache->next_job + i;
 951                 if (job_info->selection) {
 952                         cairo_surface_destroy (job_info->selection);
 953                         job_info->selection = NULL;
 954                 }
 955         }
 956
 957         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 958                 CacheJobInfo *job_info;
 959
 960                 job_info = pixbuf_cache->job_list + i;
 961                 if (job_info->selection) {
 962                         cairo_surface_destroy (job_info->selection);
 963                         job_info->selection = NULL;
 964                 }
 965         }
 966 }
 967
 968 cairo_surface_t *
 969 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 970                                        gint            page,
 971                                        gfloat          scale,
 972                                        GdkRegion     **region)
 973 {
 974         CacheJobInfo *job_info;
 975
 976         /* the document does not implement the selection interface */
 977         if (!EV_IS_SELECTION (pixbuf_cache->document))
 978                 return NULL;
 979
 980         job_info = find_job_cache (pixbuf_cache, page);
 981         if (job_info == NULL)
 982                 return NULL;
 983
 984         /* No selection on this page */
 985         if (!job_info->points_set)
 986                 return NULL;
 987
 988         /* Update the rc */
 989         g_assert (job_info->rc);
 990         ev_render_context_set_scale (job_info->rc, scale);
 991
 992         /* If we have a running job, we just return what we have under the
 993          * assumption that it'll be updated later and we can scale it as need
 994          * be */
 995         if (job_info->job && (EV_JOB_RENDER (job_info->job)->flags & EV_RENDER_INCLUDE_SELECTION))
 996                 return job_info->selection;
 997
 998         /* Now, lets see if we need to resize the image.  If we do, we clear the
 999          * old one. */
1000         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
1001
1002         /* Finally, we see if the two scales are the same, and get a new pixbuf
1003          * if needed.  We do this synchronously for now.  At some point, we
1004          * _should_ be able to get rid of the doc_mutex, so the synchronicity
1005          * doesn't kill us.  Rendering a few glyphs should really be fast.
1006          */
1007         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
1008                 EvRectangle *old_points;
1009                 GdkColor *text, *base;
1010
1011                 /* we need to get a new selection pixbuf */
1012                 ev_document_doc_mutex_lock ();
1013                 if (job_info->selection_points.x1 < 0) {
1014                         g_assert (job_info->selection == NULL);
1015                         old_points = NULL;
1016                 } else {
1017                         g_assert (job_info->selection != NULL);
1018                         old_points = &(job_info->selection_points);
1019                 }
1020
1021                 if (job_info->selection_region)
1022                         gdk_region_destroy (job_info->selection_region);
1023                 job_info->selection_region =
1024                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
1025                                                            job_info->rc,
1026                                                            job_info->selection_style,
1027                                                            &(job_info->target_points));
1028
1029                 gtk_widget_ensure_style (pixbuf_cache->view);
1030
1031                 get_selection_colors (pixbuf_cache->view, &text, &base);
1032
1033                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
1034                                                job_info->rc, &(job_info->selection),
1035                                                &(job_info->target_points),
1036                                                old_points,
1037                                                job_info->selection_style,
1038                                                text, base);
1039                 job_info->selection_points = job_info->target_points;
1040                 ev_document_doc_mutex_unlock ();
1041         }
1042         if (region)
1043                 *region = job_info->selection_region;
1044         return job_info->selection;
1045 }
1046
1047 static void
1048 update_job_selection (CacheJobInfo    *job_info,
1049                       EvViewSelection *selection)
1050 {
1051         job_info->points_set = TRUE;
1052         job_info->target_points = selection->rect;
1053         job_info->selection_style = selection->style;
1054 }
1055
1056 static void
1057 clear_job_selection (CacheJobInfo *job_info)
1058 {
1059         job_info->points_set = FALSE;
1060         job_info->selection_points.x1 = -1;
1061
1062         if (job_info->selection) {
1063                 cairo_surface_destroy (job_info->selection);
1064                 job_info->selection = NULL;
1065         }
1066 }
1067
1068 /* This function will reset the selection on pages that no longer have them, and
1069  * will update the target_selection on those that need it.  It will _not_ free
1070  * the previous selection_list -- that's up to caller to do.
1071  */
1072 void
1073 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
1074                                     GList         *selection_list)
1075 {
1076         EvPageCache *page_cache;
1077         EvViewSelection *selection;
1078         GList *list = selection_list;
1079         int page;
1080         int i;
1081
1082         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
1083
1084         if (!EV_IS_SELECTION (pixbuf_cache->document))
1085                 return;
1086
1087         page_cache = ev_page_cache_get (pixbuf_cache->document);
1088
1089         /* We check each area to see what needs updating, and what needs freeing; */
1090         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1091         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1092                 if (page < 0) {
1093                         page ++;
1094                         continue;
1095                 }
1096
1097                 selection = NULL;
1098                 while (list) {
1099                         if (((EvViewSelection *)list->data)->page == page) {
1100                                 selection = list->data;
1101                                 break;
1102                         } else if (((EvViewSelection *)list->data)->page > page)
1103                                 break;
1104                         list = list->next;
1105                 }
1106
1107                 if (selection)
1108                         update_job_selection (pixbuf_cache->prev_job + i, selection);
1109                 else
1110                         clear_job_selection (pixbuf_cache->prev_job + i);
1111                 page ++;
1112         }
1113
1114         page = pixbuf_cache->start_page;
1115         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1116                 selection = NULL;
1117                 while (list) {
1118                         if (((EvViewSelection *)list->data)->page == page) {
1119                                 selection = list->data;
1120                                 break;
1121                         } else if (((EvViewSelection *)list->data)->page > page)
1122                                 break;
1123                         list = list->next;
1124                 }
1125
1126                 if (selection)
1127                         update_job_selection (pixbuf_cache->job_list + i, selection);
1128                 else
1129                         clear_job_selection (pixbuf_cache->job_list + i);
1130                 page ++;
1131         }
1132
1133         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1134                 if (page >= ev_page_cache_get_n_pages (page_cache))
1135                         break;
1136
1137                 selection = NULL;
1138                 while (list) {
1139                         if (((EvViewSelection *)list->data)->page == page) {
1140                                 selection = list->data;
1141                                 break;
1142                         } else if (((EvViewSelection *)list->data)->page > page)
1143                                 break;
1144                         list = list->next;
1145                 }
1146
1147                 if (selection)
1148                         update_job_selection (pixbuf_cache->next_job + i, selection);
1149                 else
1150                         clear_job_selection (pixbuf_cache->next_job + i);
1151                 page ++;
1152         }
1153 }
1154
1155
1156 /* Returns what the pixbuf cache thinks is */
1157
1158 GList *
1159 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
1160 {
1161         EvPageCache *page_cache;
1162         EvViewSelection *selection;
1163         GList *retval = NULL;
1164         int page;
1165         int i;
1166
1167         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
1168
1169         page_cache = ev_page_cache_get (pixbuf_cache->document);
1170
1171         /* We check each area to see what needs updating, and what needs freeing; */
1172         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
1173         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1174                 if (page < 0) {
1175                         page ++;
1176                         continue;
1177                 }
1178
1179                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
1180                         selection = g_new0 (EvViewSelection, 1);
1181                         selection->page = page;
1182                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1183                         if (pixbuf_cache->prev_job[i].selection_region)
1184                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1185                         retval = g_list_append (retval, selection);
1186                 }
1187
1188                 page ++;
1189         }
1190
1191         page = pixbuf_cache->start_page;
1192         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1193                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1194                         selection = g_new0 (EvViewSelection, 1);
1195                         selection->page = page;
1196                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1197                         if (pixbuf_cache->job_list[i].selection_region)
1198                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1199                         retval = g_list_append (retval, selection);
1200                 }
1201
1202                 page ++;
1203         }
1204
1205         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1206                 if (page >= ev_page_cache_get_n_pages (page_cache))
1207                         break;
1208
1209                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1210                         selection = g_new0 (EvViewSelection, 1);
1211                         selection->page = page;
1212                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1213                         if (pixbuf_cache->next_job[i].selection_region)
1214                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1215                         retval = g_list_append (retval, selection);
1216                 }
1217
1218                 page ++;
1219         }
1220
1221         return retval;
1222 }
1223
1224 void
1225 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1226                              GdkRegion     *region,
1227                              gint           page,
1228                              gint           rotation,
1229                              gdouble        scale)
1230 {
1231         CacheJobInfo *job_info;
1232         EvPageCache *page_cache;
1233         gint width, height;
1234
1235         job_info = find_job_cache (pixbuf_cache, page);
1236         if (job_info == NULL)
1237                 return;
1238
1239         page_cache = ev_page_cache_get (pixbuf_cache->document);
1240         ev_page_cache_get_size (page_cache, page, rotation, scale,
1241                                 &width, &height);
1242
1243         add_job (pixbuf_cache, job_info, page_cache, region,
1244                  width, height, page, rotation, scale,
1245                  EV_JOB_PRIORITY_URGENT);
1246 }
1247
1248