1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
6 typedef struct _EvPageCacheInfo
28 double uniform_height;
33 double* height_to_page;
34 double* dual_height_to_page;
38 EvPageCacheInfo *size_cache;
39 EvDocumentInfo *page_info;
42 struct _EvPageCacheClass
44 GObjectClass parent_class;
46 void (* page_changed) (EvPageCache *page_cache, gint page);
55 static guint signals[N_SIGNALS] = {0, };
57 static void ev_page_cache_init (EvPageCache *page_cache);
58 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
59 static void ev_page_cache_finalize (GObject *object);
61 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
64 ev_page_cache_init (EvPageCache *page_cache)
66 page_cache->current_page = -1;
67 page_cache->max_label_chars = 0;
71 ev_page_cache_class_init (EvPageCacheClass *class)
73 GObjectClass *object_class;
75 object_class = G_OBJECT_CLASS (class);
77 object_class->finalize = ev_page_cache_finalize;
79 signals [PAGE_CHANGED] =
80 g_signal_new ("page-changed",
83 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
85 g_cclosure_marshal_VOID__INT,
92 ev_page_cache_finalize (GObject *object)
94 EvPageCache *page_cache;
96 page_cache = EV_PAGE_CACHE (object);
98 g_free (page_cache->title);
99 g_free (page_cache->size_cache);
100 g_free (page_cache->height_to_page);
101 g_free (page_cache->dual_height_to_page);
103 ev_document_info_free (page_cache->page_info);
107 build_height_to_page (EvPageCache *page_cache)
111 double uniform_height, page_height, next_page_height;
114 swap = (page_cache->rotation == 90 ||
115 page_cache->rotation == 270);
117 g_free (page_cache->height_to_page);
118 g_free (page_cache->dual_height_to_page);
120 page_cache->height_to_page = g_new0(double, page_cache->n_pages);
121 page_cache->dual_height_to_page = g_new0(double, page_cache->n_pages / 2 + 1);
124 for (i = 0; i < page_cache->n_pages; i++) {
125 if (page_cache->uniform) {
127 uniform_height = page_cache->uniform_height;
129 uniform_height = page_cache->uniform_width;
131 page_cache->height_to_page [i] = (i + 1) * uniform_height;
134 page_height = page_cache->size_cache [i].height;
136 page_height = page_cache->size_cache [i].width;
138 page_cache->height_to_page [i] = saved_height + page_height;
139 saved_height = page_cache->height_to_page [i];
144 for (i = 0; i < page_cache->n_pages; i += 2) {
145 if (page_cache->uniform) {
147 uniform_height = page_cache->uniform_height;
149 uniform_height = page_cache->uniform_width;
151 page_cache->dual_height_to_page [i / 2] = (i / 2 + 1) * uniform_height;
154 page_height = page_cache->size_cache [i].height;
155 next_page_height = page_cache->size_cache [i + 1].height;
157 page_height = page_cache->size_cache [i].width;
158 next_page_height = page_cache->size_cache [i + 1].width;
160 if (i == page_cache->n_pages - 1) {
161 page_cache->dual_height_to_page [i / 2] =
162 saved_height + page_height;
165 page_cache->dual_height_to_page [i / 2] = saved_height +
166 MAX(page_height, next_page_height);
167 saved_height = page_cache->dual_height_to_page [i / 2];
174 ev_page_cache_new (EvDocument *document)
176 EvPageCache *page_cache;
177 EvPageCacheInfo *info;
180 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
182 ev_document_doc_mutex_lock ();
184 /* We read page information out of the document */
186 /* Assume all pages are the same size until proven otherwise */
187 page_cache->uniform = TRUE;
188 page_cache->has_labels = FALSE;
189 page_cache->n_pages = ev_document_get_n_pages (document);
190 page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
191 page_cache->max_width = 0;
192 page_cache->max_height = 0;
193 page_cache->page_info = ev_document_get_info (document);
195 if (page_cache->page_info->fields_mask & EV_DOCUMENT_INFO_TITLE) {
196 page_cache->title = g_strdup (page_cache->page_info->title);
198 page_cache->title = NULL;
201 for (i = 0; i < page_cache->n_pages; i++) {
202 double page_width = 0;
203 double page_height = 0;
205 ev_document_get_page_size (document, i, &page_width, &page_height);
207 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
209 if (page_cache->page_labels[i] != NULL) {
211 page_cache->max_label_chars = MAX(page_cache->max_label_chars,
212 g_utf8_strlen (page_cache->page_labels[i], 256));
213 if (!page_cache->has_labels) {
214 gchar *expected_label;
216 expected_label = g_strdup_printf ("%d", i + 1);
217 if (strcmp (expected_label, page_cache->page_labels[i]))
218 page_cache->has_labels = TRUE;
219 g_free (expected_label);
223 if (page_width > page_cache->max_width) {
224 page_cache->max_width = page_width;
227 if (page_height > page_cache->max_height) {
228 page_cache->max_height = page_height;
232 page_cache->uniform_width = page_width;
233 page_cache->uniform_height = page_height;
234 } else if (page_cache->uniform &&
235 (page_cache->uniform_width != page_width ||
236 page_cache->uniform_height != page_height)) {
237 /* It's a different page size. Backfill the array. */
240 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
242 for (j = 0; j < i; j++) {
243 info = &(page_cache->size_cache [j]);
244 info->width = page_cache->uniform_width;
245 info->height = page_cache->uniform_height;
247 page_cache->uniform = FALSE;
251 if (! page_cache->uniform) {
252 info = &(page_cache->size_cache [i]);
254 info->width = page_width;
255 info->height = page_height;
259 build_height_to_page (page_cache);
261 /* make some sanity check assertions */
262 if (! page_cache->uniform)
263 g_assert (page_cache->size_cache != NULL);
264 if (page_cache->uniform && page_cache->n_pages > 0)
265 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
267 ev_document_doc_mutex_unlock ();
269 if (page_cache->n_pages > 0)
270 ev_page_cache_set_current_page (page_cache, 0);
276 ev_page_cache_get_n_pages (EvPageCache *page_cache)
278 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
280 return page_cache->n_pages;
284 ev_page_cache_get_current_page (EvPageCache *page_cache)
286 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
288 return page_cache->current_page;
292 ev_page_cache_set_current_page (EvPageCache *page_cache,
295 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
296 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
298 if (page == page_cache->current_page)
301 page_cache->current_page = page;
302 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
306 ev_page_cache_set_page_label (EvPageCache *page_cache,
307 const char *page_label)
313 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
314 g_return_val_if_fail (page_label != NULL, FALSE);
316 /* First, look for a literal label match */
317 for (i = 0; i < page_cache->n_pages; i ++) {
318 if (page_cache->page_labels[i] != NULL &&
319 ! strcmp (page_label, page_cache->page_labels[i])) {
320 ev_page_cache_set_current_page (page_cache, i);
325 /* Next, parse the label, and see if the number fits */
326 value = strtol (page_label, &endptr, 10);
327 if (endptr[0] == '\0') {
328 /* Page number is an integer */
329 page = MIN (G_MAXINT, value);
331 /* convert from a page label to a page offset */
334 page < page_cache->n_pages &&
335 page_cache->page_labels[page] == NULL) {
336 ev_page_cache_set_current_page (page_cache, page);
345 ev_page_cache_set_link (EvPageCache *page_cache,
348 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
349 g_return_if_fail (EV_IS_LINK (link));
351 ev_page_cache_set_current_page (page_cache, ev_link_get_page (link));
355 ev_page_cache_get_title (EvPageCache *page_cache)
357 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
359 return page_cache->title;
363 ev_page_cache_get_size (EvPageCache *page_cache,
372 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
373 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
375 if (page_cache->uniform) {
376 w = page_cache->uniform_width;
377 h = page_cache->uniform_height;
379 EvPageCacheInfo *info;
381 info = &(page_cache->size_cache [page]);
387 w = (int) (w * scale + 0.5);
388 h = (int) (h * scale + 0.5);
390 if (rotation == 0 || rotation == 180) {
391 if (width) *width = w;
392 if (height) *height = h;
394 if (width) *width = h;
395 if (height) *height = w;
400 ev_page_cache_get_max_width (EvPageCache *page_cache,
405 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
408 if (rotation == 0 || rotation == 180) {
409 *width = page_cache->max_width * scale;
411 *width = page_cache->max_height * scale;
417 ev_page_cache_get_max_height (EvPageCache *page_cache,
422 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
425 if (rotation == 0 || rotation == 180) {
426 *height = page_cache->max_height * scale;
428 *height = page_cache->max_width * scale;
434 ev_page_cache_get_height_to_page (EvPageCache *page_cache,
442 double dual_result = 0.0;
444 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
446 if (page_cache->rotation != rotation) {
447 page_cache->rotation = rotation;
448 build_height_to_page (page_cache);
452 result = page_cache->height_to_page [page - 1];
455 *height = result * scale;
458 dual_result = page_cache->dual_height_to_page [page / 2 - 1];
461 *dual_height = dual_result * scale;
465 ev_page_cache_get_max_label_chars (EvPageCache *page_cache)
467 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
469 return page_cache->max_label_chars;
473 ev_page_cache_get_page_label (EvPageCache *page_cache,
476 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
477 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
479 if (page_cache->page_labels[page] == NULL)
480 return g_strdup_printf ("%d", page + 1);
482 return g_strdup (page_cache->page_labels[page]);
486 ev_page_cache_has_nonnumeric_page_labels (EvPageCache *page_cache)
488 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
489 return page_cache->has_labels;
492 const EvDocumentInfo *
493 ev_page_cache_get_info (EvPageCache *page_cache)
495 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
497 return page_cache->page_info;
502 ev_page_cache_next_page (EvPageCache *page_cache)
504 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
506 if (page_cache->current_page >= page_cache->n_pages - 1)
509 ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
515 ev_page_cache_prev_page (EvPageCache *page_cache)
517 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
519 if (page_cache->current_page <= 0)
522 ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);
526 #define PAGE_CACHE_STRING "ev-page-cache"
529 ev_page_cache_get (EvDocument *document)
531 EvPageCache *page_cache;
533 g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
535 page_cache = g_object_get_data (G_OBJECT (document), PAGE_CACHE_STRING);
536 if (page_cache == NULL) {
537 page_cache = ev_page_cache_new (document);
538 g_object_set_data_full (G_OBJECT (document), PAGE_CACHE_STRING, page_cache, g_object_unref);