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