1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
6 typedef struct _EvPageCacheInfo
26 gboolean dual_even_left;
29 double uniform_height;
34 double* height_to_page;
35 double* dual_height_to_page;
39 EvPageCacheInfo *size_cache;
40 EvDocumentInfo *page_info;
43 struct _EvPageCacheClass
45 GObjectClass parent_class;
47 void (* page_changed) (EvPageCache *page_cache, gint page);
48 void (* history_changed) (EvPageCache *page_cache, gint page);
58 static guint signals[N_SIGNALS] = {0, };
60 static void ev_page_cache_init (EvPageCache *page_cache);
61 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
62 static void ev_page_cache_finalize (GObject *object);
64 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
67 ev_page_cache_init (EvPageCache *page_cache)
69 page_cache->current_page = -1;
70 page_cache->max_label_chars = 0;
74 ev_page_cache_class_init (EvPageCacheClass *class)
76 GObjectClass *object_class;
78 object_class = G_OBJECT_CLASS (class);
80 object_class->finalize = ev_page_cache_finalize;
82 signals [PAGE_CHANGED] =
83 g_signal_new ("page-changed",
86 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
88 g_cclosure_marshal_VOID__INT,
92 signals [HISTORY_CHANGED] =
93 g_signal_new ("history-changed",
96 G_STRUCT_OFFSET (EvPageCacheClass, history_changed),
98 g_cclosure_marshal_VOID__INT,
105 ev_page_cache_finalize (GObject *object)
107 EvPageCache *page_cache;
109 page_cache = EV_PAGE_CACHE (object);
111 if (page_cache->title) {
112 g_free (page_cache->title);
113 page_cache->title = NULL;
116 if (page_cache->size_cache) {
117 g_free (page_cache->size_cache);
118 page_cache->size_cache = NULL;
121 if (page_cache->height_to_page) {
122 g_free (page_cache->height_to_page);
123 page_cache->height_to_page = NULL;
126 if (page_cache->dual_height_to_page) {
127 g_free (page_cache->dual_height_to_page);
128 page_cache->dual_height_to_page = NULL;
131 if (page_cache->page_labels) {
132 g_strfreev (page_cache->page_labels);
133 page_cache->page_labels = NULL;
136 if (page_cache->page_info) {
137 ev_document_info_free (page_cache->page_info);
138 page_cache->page_info = NULL;
141 G_OBJECT_CLASS (ev_page_cache_parent_class)->finalize (object);
145 build_height_to_page (EvPageCache *page_cache)
149 double uniform_height, page_height, next_page_height;
152 swap = (page_cache->rotation == 90 ||
153 page_cache->rotation == 270);
155 g_free (page_cache->height_to_page);
156 g_free (page_cache->dual_height_to_page);
158 page_cache->height_to_page = g_new0(double, page_cache->n_pages + 1);
159 page_cache->dual_height_to_page = g_new0(double, page_cache->n_pages + 2);
162 for (i = 0; i <= page_cache->n_pages; i++) {
163 if (page_cache->uniform) {
165 uniform_height = page_cache->uniform_height;
167 uniform_height = page_cache->uniform_width;
169 page_cache->height_to_page [i] = i * uniform_height;
172 page_height = page_cache->size_cache [i].height;
174 page_height = page_cache->size_cache [i].width;
176 page_cache->height_to_page [i] = saved_height;
177 saved_height += page_height;
181 if (page_cache->dual_even_left && !page_cache->uniform) {
183 saved_height = page_cache->size_cache [0].height;
185 saved_height = page_cache->size_cache [0].width;
190 for (i = page_cache->dual_even_left; i < page_cache->n_pages + 2; i += 2) {
191 if (page_cache->uniform) {
193 uniform_height = page_cache->uniform_height;
195 uniform_height = page_cache->uniform_width;
197 page_cache->dual_height_to_page [i] = ((i + page_cache->dual_even_left) / 2) * uniform_height;
198 if (i + 1 < page_cache->n_pages + 2)
199 page_cache->dual_height_to_page [i + 1] = ((i + page_cache->dual_even_left) / 2) * uniform_height;
201 if (i + 1 < page_cache->n_pages) {
203 next_page_height = page_cache->size_cache [i + 1].height;
205 next_page_height = page_cache->size_cache [i + 1].width;
208 next_page_height = 0;
210 if (i < page_cache->n_pages) {
212 page_height = page_cache->size_cache [i].height;
214 page_height = page_cache->size_cache [i].width;
219 if (i + 1 < page_cache->n_pages + 2) {
220 page_cache->dual_height_to_page [i] = saved_height;
221 page_cache->dual_height_to_page [i + 1] = saved_height;
222 saved_height += MAX(page_height, next_page_height);
224 page_cache->dual_height_to_page [i] = saved_height;
231 ev_page_cache_new (EvDocument *document)
233 EvPageCache *page_cache;
234 EvPageCacheInfo *info;
237 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
239 ev_document_doc_mutex_lock ();
241 /* We read page information out of the document */
243 /* Assume all pages are the same size until proven otherwise */
244 page_cache->uniform = TRUE;
245 page_cache->has_labels = FALSE;
246 page_cache->n_pages = ev_document_get_n_pages (document);
247 page_cache->dual_even_left = (page_cache->n_pages > 2);
248 page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
249 page_cache->max_width = 0;
250 page_cache->max_height = 0;
251 page_cache->page_info = ev_document_get_info (document);
253 if (page_cache->page_info->fields_mask & EV_DOCUMENT_INFO_TITLE) {
254 page_cache->title = g_strdup (page_cache->page_info->title);
256 page_cache->title = NULL;
259 for (i = 0; i < page_cache->n_pages; i++) {
260 double page_width = 0;
261 double page_height = 0;
263 ev_document_get_page_size (document, i, &page_width, &page_height);
265 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
267 if (page_cache->page_labels[i] != NULL) {
269 page_cache->max_label_chars = MAX(page_cache->max_label_chars,
270 g_utf8_strlen (page_cache->page_labels[i], 256));
271 if (!page_cache->has_labels) {
272 gchar *expected_label;
274 expected_label = g_strdup_printf ("%d", i + 1);
275 if (strcmp (expected_label, page_cache->page_labels[i]))
276 page_cache->has_labels = TRUE;
277 g_free (expected_label);
281 if (page_width > page_cache->max_width) {
282 page_cache->max_width = page_width;
285 if (page_height > page_cache->max_height) {
286 page_cache->max_height = page_height;
290 page_cache->uniform_width = page_width;
291 page_cache->uniform_height = page_height;
292 } else if (page_cache->uniform &&
293 (page_cache->uniform_width != page_width ||
294 page_cache->uniform_height != page_height)) {
295 /* It's a different page size. Backfill the array. */
298 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
300 for (j = 0; j < i; j++) {
301 info = &(page_cache->size_cache [j]);
302 info->width = page_cache->uniform_width;
303 info->height = page_cache->uniform_height;
305 page_cache->uniform = FALSE;
309 if (! page_cache->uniform) {
310 info = &(page_cache->size_cache [i]);
312 info->width = page_width;
313 info->height = page_height;
317 build_height_to_page (page_cache);
319 /* make some sanity check assertions */
320 if (! page_cache->uniform)
321 g_assert (page_cache->size_cache != NULL);
322 if (page_cache->uniform && page_cache->n_pages > 0)
323 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
325 ev_document_doc_mutex_unlock ();
327 if (page_cache->n_pages > 0)
328 ev_page_cache_set_current_page (page_cache, 0);
334 ev_page_cache_get_n_pages (EvPageCache *page_cache)
336 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
338 return page_cache->n_pages;
342 ev_page_cache_get_current_page (EvPageCache *page_cache)
344 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
346 return page_cache->current_page;
350 ev_page_cache_set_current_page (EvPageCache *page_cache,
353 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
354 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
356 if (page == page_cache->current_page)
359 page_cache->current_page = page;
360 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
364 ev_page_cache_set_current_page_history (EvPageCache *page_cache,
367 if (abs (page - page_cache->current_page) > 1)
368 g_signal_emit (page_cache, signals [HISTORY_CHANGED], 0, page);
370 ev_page_cache_set_current_page (page_cache, page);
374 ev_page_cache_set_page_label (EvPageCache *page_cache,
375 const char *page_label)
381 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
382 g_return_val_if_fail (page_label != NULL, FALSE);
384 /* First, look for a literal label match */
385 for (i = 0; i < page_cache->n_pages; i ++) {
386 if (page_cache->page_labels[i] != NULL &&
387 ! strcmp (page_label, page_cache->page_labels[i])) {
388 ev_page_cache_set_current_page (page_cache, i);
393 /* Next, parse the label, and see if the number fits */
394 value = strtol (page_label, &endptr, 10);
395 if (endptr[0] == '\0') {
396 /* Page number is an integer */
397 page = MIN (G_MAXINT, value);
399 /* convert from a page label to a page offset */
402 page < page_cache->n_pages) {
403 ev_page_cache_set_current_page (page_cache, page);
412 ev_page_cache_get_title (EvPageCache *page_cache)
414 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
416 return page_cache->title;
420 ev_page_cache_get_size (EvPageCache *page_cache,
429 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
430 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
432 if (page_cache->uniform) {
433 w = page_cache->uniform_width;
434 h = page_cache->uniform_height;
436 EvPageCacheInfo *info;
438 info = &(page_cache->size_cache [page]);
447 if (rotation == 0 || rotation == 180) {
448 if (width) *width = (int)w;
449 if (height) *height = (int)h;
451 if (width) *width = (int)h;
452 if (height) *height = (int)w;
457 ev_page_cache_get_max_width (EvPageCache *page_cache,
462 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
465 if (rotation == 0 || rotation == 180) {
466 *width = page_cache->max_width * scale;
468 *width = page_cache->max_height * scale;
474 ev_page_cache_get_max_height (EvPageCache *page_cache,
479 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
482 if (rotation == 0 || rotation == 180) {
483 *height = page_cache->max_height * scale;
485 *height = page_cache->max_width * scale;
491 ev_page_cache_get_height_to_page (EvPageCache *page_cache,
498 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
500 if (page_cache->rotation != rotation) {
501 page_cache->rotation = rotation;
502 build_height_to_page (page_cache);
506 *height = page_cache->height_to_page [page] * scale;
509 *dual_height = page_cache->dual_height_to_page [page] * scale;
513 ev_page_cache_get_max_label_chars (EvPageCache *page_cache)
515 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
517 return page_cache->max_label_chars;
521 ev_page_cache_get_dual_even_left (EvPageCache *page_cache)
523 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
525 return page_cache->dual_even_left;
529 ev_page_cache_get_page_label (EvPageCache *page_cache,
532 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
533 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
535 if (page_cache->page_labels[page] == NULL)
536 return g_strdup_printf ("%d", page + 1);
538 return g_strdup (page_cache->page_labels[page]);
542 ev_page_cache_has_nonnumeric_page_labels (EvPageCache *page_cache)
544 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
545 return page_cache->has_labels;
548 const EvDocumentInfo *
549 ev_page_cache_get_info (EvPageCache *page_cache)
551 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
553 return page_cache->page_info;
556 #define PAGE_CACHE_STRING "ev-page-cache"
559 ev_page_cache_get (EvDocument *document)
561 EvPageCache *page_cache;
563 g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
565 page_cache = g_object_get_data (G_OBJECT (document), PAGE_CACHE_STRING);
566 if (page_cache == NULL) {
567 page_cache = ev_page_cache_new (document);
568 g_object_set_data_full (G_OBJECT (document), PAGE_CACHE_STRING, page_cache, g_object_unref);