1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
3 #include "ev-document-thumbnails.h"
7 #define THUMBNAIL_WIDTH 100
9 typedef struct _EvPageCacheInfo
15 typedef struct _EvPageThumbsInfo
33 gboolean dual_even_left;
36 double uniform_height;
41 double* height_to_page;
42 double* dual_height_to_page;
46 EvPageCacheInfo *size_cache;
47 EvDocumentInfo *page_info;
49 /* Thumbnail dimensions */
50 gboolean thumbs_uniform;
51 gint thumbs_uniform_width;
52 gint thumbs_uniform_height;
53 gint thumbs_max_width;
54 gint thumbs_max_height;
55 EvPageThumbsInfo *thumbs_size_cache;
58 struct _EvPageCacheClass
60 GObjectClass parent_class;
62 void (* page_changed) (EvPageCache *page_cache, gint page);
63 void (* history_changed) (EvPageCache *page_cache, gint page);
73 static guint signals[N_SIGNALS] = {0, };
75 static void ev_page_cache_init (EvPageCache *page_cache);
76 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
77 static void ev_page_cache_finalize (GObject *object);
79 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
82 ev_page_cache_init (EvPageCache *page_cache)
84 page_cache->current_page = -1;
85 page_cache->max_label_chars = 0;
89 ev_page_cache_class_init (EvPageCacheClass *class)
91 GObjectClass *object_class;
93 object_class = G_OBJECT_CLASS (class);
95 object_class->finalize = ev_page_cache_finalize;
97 signals [PAGE_CHANGED] =
98 g_signal_new ("page-changed",
101 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
103 g_cclosure_marshal_VOID__INT,
107 signals [HISTORY_CHANGED] =
108 g_signal_new ("history-changed",
111 G_STRUCT_OFFSET (EvPageCacheClass, history_changed),
113 g_cclosure_marshal_VOID__INT,
120 ev_page_cache_finalize (GObject *object)
122 EvPageCache *page_cache;
124 page_cache = EV_PAGE_CACHE (object);
126 if (page_cache->title) {
127 g_free (page_cache->title);
128 page_cache->title = NULL;
131 if (page_cache->size_cache) {
132 g_free (page_cache->size_cache);
133 page_cache->size_cache = NULL;
136 if (page_cache->height_to_page) {
137 g_free (page_cache->height_to_page);
138 page_cache->height_to_page = NULL;
141 if (page_cache->dual_height_to_page) {
142 g_free (page_cache->dual_height_to_page);
143 page_cache->dual_height_to_page = NULL;
146 if (page_cache->page_labels) {
149 for (i = 0; i < page_cache->n_pages; i++) {
150 if (page_cache->page_labels[i])
151 g_free (page_cache->page_labels[i]);
153 g_free (page_cache->page_labels);
154 page_cache->page_labels = NULL;
157 if (page_cache->page_info) {
158 ev_document_info_free (page_cache->page_info);
159 page_cache->page_info = NULL;
162 G_OBJECT_CLASS (ev_page_cache_parent_class)->finalize (object);
166 build_height_to_page (EvPageCache *page_cache)
170 double uniform_height, page_height, next_page_height;
173 swap = (page_cache->rotation == 90 ||
174 page_cache->rotation == 270);
176 g_free (page_cache->height_to_page);
177 g_free (page_cache->dual_height_to_page);
179 page_cache->height_to_page = g_new0(double, page_cache->n_pages + 1);
180 page_cache->dual_height_to_page = g_new0(double, page_cache->n_pages + 2);
183 for (i = 0; i <= page_cache->n_pages; i++) {
184 if (page_cache->uniform) {
186 uniform_height = page_cache->uniform_height;
188 uniform_height = page_cache->uniform_width;
190 page_cache->height_to_page [i] = i * uniform_height;
192 if (i < page_cache->n_pages) {
194 page_height = page_cache->size_cache [i].height;
196 page_height = page_cache->size_cache [i].width;
201 page_cache->height_to_page [i] = saved_height;
202 saved_height += page_height;
206 if (page_cache->dual_even_left && !page_cache->uniform) {
208 saved_height = page_cache->size_cache [0].height;
210 saved_height = page_cache->size_cache [0].width;
215 for (i = page_cache->dual_even_left; i < page_cache->n_pages + 2; i += 2) {
216 if (page_cache->uniform) {
218 uniform_height = page_cache->uniform_height;
220 uniform_height = page_cache->uniform_width;
222 page_cache->dual_height_to_page [i] = ((i + page_cache->dual_even_left) / 2) * uniform_height;
223 if (i + 1 < page_cache->n_pages + 2)
224 page_cache->dual_height_to_page [i + 1] = ((i + page_cache->dual_even_left) / 2) * uniform_height;
226 if (i + 1 < page_cache->n_pages) {
228 next_page_height = page_cache->size_cache [i + 1].height;
230 next_page_height = page_cache->size_cache [i + 1].width;
233 next_page_height = 0;
235 if (i < page_cache->n_pages) {
237 page_height = page_cache->size_cache [i].height;
239 page_height = page_cache->size_cache [i].width;
244 if (i + 1 < page_cache->n_pages + 2) {
245 page_cache->dual_height_to_page [i] = saved_height;
246 page_cache->dual_height_to_page [i + 1] = saved_height;
247 saved_height += MAX(page_height, next_page_height);
249 page_cache->dual_height_to_page [i] = saved_height;
256 ev_page_cache_new (EvDocument *document)
258 EvPageCache *page_cache;
259 EvPageCacheInfo *info;
260 EvPageThumbsInfo *thumb_info;
261 EvRenderContext *rc = NULL;
265 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
267 ev_document_doc_mutex_lock ();
269 /* We read page information out of the document */
271 /* Assume all pages are the same size until proven otherwise */
272 page_cache->uniform = TRUE;
273 page_cache->has_labels = FALSE;
274 page_cache->n_pages = ev_document_get_n_pages (document);
275 page_cache->dual_even_left = (page_cache->n_pages > 2);
276 page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
277 page_cache->max_width = 0;
278 page_cache->max_height = 0;
279 page_cache->page_info = ev_document_get_info (document);
280 page_cache->thumbs_uniform = TRUE;
282 if (page_cache->page_info->fields_mask & EV_DOCUMENT_INFO_TITLE) {
283 page_cache->title = g_strdup (page_cache->page_info->title);
285 page_cache->title = NULL;
288 has_thumbs = EV_IS_DOCUMENT_THUMBNAILS (document);
290 for (i = 0; i < page_cache->n_pages; i++) {
291 double page_width = 0;
292 double page_height = 0;
293 gint thumb_width = 0;
294 gint thumb_height = 0;
296 ev_document_get_page_size (document, i, &page_width, &page_height);
298 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
300 if (page_cache->page_labels[i] != NULL) {
302 page_cache->max_label_chars = MAX(page_cache->max_label_chars,
303 g_utf8_strlen (page_cache->page_labels[i], 256));
304 if (!page_cache->has_labels) {
305 gchar *expected_label;
307 expected_label = g_strdup_printf ("%d", i + 1);
308 if (strcmp (expected_label, page_cache->page_labels[i]))
309 page_cache->has_labels = TRUE;
310 g_free (expected_label);
314 if (page_width > page_cache->max_width) {
315 page_cache->max_width = page_width;
318 if (page_height > page_cache->max_height) {
319 page_cache->max_height = page_height;
323 page_cache->uniform_width = page_width;
324 page_cache->uniform_height = page_height;
325 } else if (page_cache->uniform &&
326 (page_cache->uniform_width != page_width ||
327 page_cache->uniform_height != page_height)) {
328 /* It's a different page size. Backfill the array. */
331 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
333 for (j = 0; j < i; j++) {
334 info = &(page_cache->size_cache [j]);
335 info->width = page_cache->uniform_width;
336 info->height = page_cache->uniform_height;
338 page_cache->uniform = FALSE;
342 if (! page_cache->uniform) {
343 info = &(page_cache->size_cache [i]);
345 info->width = page_width;
346 info->height = page_height;
353 rc = ev_render_context_new (0, i, (gdouble)THUMBNAIL_WIDTH / page_width);
355 ev_render_context_set_page (rc, i);
356 ev_render_context_set_scale (rc, (gdouble)THUMBNAIL_WIDTH / page_width);
359 ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (document),
360 rc, &thumb_width, &thumb_height);
362 if (thumb_width > page_cache->thumbs_max_width) {
363 page_cache->thumbs_max_width = thumb_width;
366 if (thumb_height > page_cache->thumbs_max_height) {
367 page_cache->thumbs_max_height = thumb_height;
371 page_cache->thumbs_uniform_width = thumb_width;
372 page_cache->thumbs_uniform_height = thumb_height;
373 } else if (page_cache->thumbs_uniform &&
374 (page_cache->thumbs_uniform_width != thumb_width ||
375 page_cache->thumbs_uniform_height != thumb_height)) {
376 /* It's a different thumbnail size. Backfill the array. */
379 page_cache->thumbs_size_cache = g_new0 (EvPageThumbsInfo, page_cache->n_pages);
381 for (j = 0; j < i; j++) {
382 thumb_info = &(page_cache->thumbs_size_cache [j]);
383 thumb_info->width = page_cache->thumbs_uniform_width;
384 thumb_info->height = page_cache->thumbs_uniform_height;
386 page_cache->thumbs_uniform = FALSE;
389 if (! page_cache->thumbs_uniform) {
390 thumb_info = &(page_cache->thumbs_size_cache [i]);
392 thumb_info->width = thumb_width;
393 thumb_info->height = thumb_height;
401 build_height_to_page (page_cache);
403 /* make some sanity check assertions */
404 if (! page_cache->uniform)
405 g_assert (page_cache->size_cache != NULL);
406 if (page_cache->uniform && page_cache->n_pages > 0)
407 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
409 ev_document_doc_mutex_unlock ();
411 if (page_cache->n_pages > 0)
412 ev_page_cache_set_current_page (page_cache, 0);
418 ev_page_cache_get_n_pages (EvPageCache *page_cache)
420 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
422 return page_cache->n_pages;
426 ev_page_cache_get_current_page (EvPageCache *page_cache)
428 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
430 return page_cache->current_page;
434 ev_page_cache_set_current_page (EvPageCache *page_cache,
437 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
438 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
440 if (page == page_cache->current_page)
443 page_cache->current_page = page;
444 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
448 ev_page_cache_set_current_page_history (EvPageCache *page_cache,
451 if (abs (page - page_cache->current_page) > 1)
452 g_signal_emit (page_cache, signals [HISTORY_CHANGED], 0, page);
454 ev_page_cache_set_current_page (page_cache, page);
458 ev_page_cache_set_page_label (EvPageCache *page_cache,
459 const char *page_label)
465 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
466 g_return_val_if_fail (page_label != NULL, FALSE);
468 /* First, look for a literal label match */
469 for (i = 0; i < page_cache->n_pages; i ++) {
470 if (page_cache->page_labels[i] != NULL &&
471 ! strcmp (page_label, page_cache->page_labels[i])) {
472 ev_page_cache_set_current_page (page_cache, i);
477 /* Next, parse the label, and see if the number fits */
478 value = strtol (page_label, &endptr, 10);
479 if (endptr[0] == '\0') {
480 /* Page number is an integer */
481 page = MIN (G_MAXINT, value);
483 /* convert from a page label to a page offset */
486 page < page_cache->n_pages) {
487 ev_page_cache_set_current_page (page_cache, page);
496 ev_page_cache_get_title (EvPageCache *page_cache)
498 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
500 return page_cache->title;
504 ev_page_cache_get_size (EvPageCache *page_cache,
513 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
514 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
516 if (page_cache->uniform) {
517 w = page_cache->uniform_width;
518 h = page_cache->uniform_height;
520 EvPageCacheInfo *info;
522 info = &(page_cache->size_cache [page]);
531 if (rotation == 0 || rotation == 180) {
532 if (width) *width = (int)w;
533 if (height) *height = (int)h;
535 if (width) *width = (int)h;
536 if (height) *height = (int)w;
541 ev_page_cache_get_max_width (EvPageCache *page_cache,
546 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
549 if (rotation == 0 || rotation == 180) {
550 *width = page_cache->max_width * scale;
552 *width = page_cache->max_height * scale;
558 ev_page_cache_get_max_height (EvPageCache *page_cache,
563 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
566 if (rotation == 0 || rotation == 180) {
567 *height = page_cache->max_height * scale;
569 *height = page_cache->max_width * scale;
575 ev_page_cache_get_height_to_page (EvPageCache *page_cache,
582 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
583 g_return_if_fail (page >= 0);
584 g_return_if_fail (!height || page <= page_cache->n_pages);
585 g_return_if_fail (!dual_height || page <= page_cache->n_pages + 1);
587 if (page_cache->rotation != rotation) {
588 page_cache->rotation = rotation;
589 build_height_to_page (page_cache);
593 *height = page_cache->height_to_page [page] * scale;
596 *dual_height = page_cache->dual_height_to_page [page] * scale;
600 ev_page_cache_get_thumbnail_size (EvPageCache *page_cache,
608 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
609 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
611 if (page_cache->thumbs_uniform) {
612 w = page_cache->thumbs_uniform_width;
613 h = page_cache->thumbs_uniform_height;
615 EvPageThumbsInfo *info;
617 info = &(page_cache->thumbs_size_cache [page]);
623 if (rotation == 0 || rotation == 180) {
624 if (width) *width = w;
625 if (height) *height = h;
627 if (width) *width = h;
628 if (height) *height = w;
633 ev_page_cache_get_max_label_chars (EvPageCache *page_cache)
635 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
637 return page_cache->max_label_chars;
641 ev_page_cache_get_dual_even_left (EvPageCache *page_cache)
643 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
645 return page_cache->dual_even_left;
649 ev_page_cache_get_page_label (EvPageCache *page_cache,
652 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
653 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
655 if (page_cache->page_labels[page] == NULL)
656 return g_strdup_printf ("%d", page + 1);
658 return g_strdup (page_cache->page_labels[page]);
662 ev_page_cache_has_nonnumeric_page_labels (EvPageCache *page_cache)
664 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
665 return page_cache->has_labels;
668 const EvDocumentInfo *
669 ev_page_cache_get_info (EvPageCache *page_cache)
671 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
673 return page_cache->page_info;
676 #define PAGE_CACHE_STRING "ev-page-cache"
679 ev_page_cache_get (EvDocument *document)
681 EvPageCache *page_cache;
683 g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
685 page_cache = g_object_get_data (G_OBJECT (document), PAGE_CACHE_STRING);
686 if (page_cache == NULL) {
687 page_cache = ev_page_cache_new (document);
688 g_object_set_data_full (G_OBJECT (document), PAGE_CACHE_STRING, page_cache, g_object_unref);