1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
6 typedef struct _EvPageCacheInfo
28 double uniform_height;
32 double* height_to_page;
33 double* dual_height_to_page;
35 EvPageCacheInfo *size_cache;
36 EvDocumentInfo *page_info;
39 struct _EvPageCacheClass
41 GObjectClass parent_class;
43 void (* page_changed) (EvPageCache *page_cache, gint page);
52 static guint signals[N_SIGNALS] = {0, };
54 static void ev_page_cache_init (EvPageCache *page_cache);
55 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
56 static void ev_page_cache_finalize (GObject *object);
58 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
61 ev_page_cache_init (EvPageCache *page_cache)
63 page_cache->current_page = -1;
64 page_cache->max_label_chars = 0;
68 ev_page_cache_class_init (EvPageCacheClass *class)
70 GObjectClass *object_class;
72 object_class = G_OBJECT_CLASS (class);
74 object_class->finalize = ev_page_cache_finalize;
76 signals [PAGE_CHANGED] =
77 g_signal_new ("page-changed",
80 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
82 g_cclosure_marshal_VOID__INT,
89 ev_page_cache_finalize (GObject *object)
91 EvPageCache *page_cache;
93 page_cache = EV_PAGE_CACHE (object);
95 g_free (page_cache->title);
96 g_free (page_cache->size_cache);
97 g_free (page_cache->height_to_page);
98 g_free (page_cache->dual_height_to_page);
100 ev_document_info_free (page_cache->page_info);
104 _ev_page_cache_new (EvDocument *document)
106 EvDocumentInfo *doc_info;
107 EvPageCache *page_cache;
108 EvPageCacheInfo *info;
112 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
114 ev_document_doc_mutex_lock ();
116 /* We read page information out of the document */
118 /* Assume all pages are the same size until proven otherwise */
119 page_cache->uniform = TRUE;
120 page_cache->has_labels = FALSE;
121 page_cache->n_pages = ev_document_get_n_pages (document);
122 page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
123 page_cache->max_width = 0;
124 page_cache->max_height = 0;
126 doc_info = ev_document_get_info (document);
127 if (doc_info->fields_mask & EV_DOCUMENT_INFO_TITLE) {
128 page_cache->title = g_strdup (doc_info->title);
130 page_cache->title = NULL;
134 for (i = 0; i < page_cache->n_pages; i++) {
135 double page_width = 0;
136 double page_height = 0;
138 ev_document_get_page_size (document, i, &page_width, &page_height);
140 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
142 if (page_cache->page_labels[i] != NULL) {
144 page_cache->max_label_chars = MAX(page_cache->max_label_chars,
145 g_utf8_strlen (page_cache->page_labels[i], 256));
146 if (!page_cache->has_labels) {
147 gchar *expected_label;
149 expected_label = g_strdup_printf ("%d", i + 1);
150 if (strcmp (expected_label, page_cache->page_labels[i]))
151 page_cache->has_labels = TRUE;
152 g_free (expected_label);
156 if (page_width > page_cache->max_width) {
157 page_cache->max_width = page_width;
160 if (page_height > page_cache->max_height) {
161 page_cache->max_height = page_height;
165 page_cache->uniform_width = page_width;
166 page_cache->uniform_height = page_height;
167 } else if (page_cache->uniform &&
168 (page_cache->uniform_width != page_width ||
169 page_cache->uniform_height != page_height)) {
170 /* It's a different page size. Backfill the array. */
173 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
175 for (j = 0; j < i; j++) {
176 info = &(page_cache->size_cache [j]);
177 info->width = page_cache->uniform_width;
178 info->height = page_cache->uniform_height;
180 page_cache->uniform = FALSE;
184 if (! page_cache->uniform) {
185 info = &(page_cache->size_cache [i]);
187 info->width = page_width;
188 info->height = page_height;
192 page_cache->height_to_page = g_new0(double, page_cache->n_pages);
193 page_cache->dual_height_to_page = g_new0(double, page_cache->n_pages / 2 + 1);
196 for (i = 0; i < page_cache->n_pages; i++) {
198 if (page_cache->uniform) {
199 page_cache->height_to_page [i] = (i + 1) * page_cache->uniform_height;
201 page_cache->height_to_page [i] = saved_height + page_cache->size_cache [i].height;
202 saved_height = page_cache->height_to_page [i];
207 for (i = 0; i < page_cache->n_pages; i += 2) {
209 if (page_cache->uniform) {
210 page_cache->dual_height_to_page [i / 2] = (i / 2 + 1) * page_cache->uniform_height;
212 if (i == page_cache->n_pages - 1) {
213 page_cache->dual_height_to_page [i / 2] =
214 saved_height + page_cache->size_cache [i].height;
217 page_cache->dual_height_to_page [i / 2] = saved_height +
218 MAX(page_cache->size_cache [i].height,
219 page_cache->size_cache [i + 1].height);
220 saved_height = page_cache->dual_height_to_page [i / 2];
225 page_cache->page_info = ev_document_get_info (document);
227 /* make some sanity check assertions */
228 if (! page_cache->uniform)
229 g_assert (page_cache->size_cache != NULL);
230 if (page_cache->uniform)
231 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
233 ev_document_doc_mutex_unlock ();
235 if (page_cache->n_pages > 0)
236 ev_page_cache_set_current_page (page_cache, 0);
242 ev_page_cache_get_n_pages (EvPageCache *page_cache)
244 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
246 return page_cache->n_pages;
250 ev_page_cache_get_current_page (EvPageCache *page_cache)
252 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
254 return page_cache->current_page;
258 ev_page_cache_set_current_page (EvPageCache *page_cache,
261 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
262 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
264 if (page == page_cache->current_page)
267 page_cache->current_page = page;
268 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
272 ev_page_cache_set_page_label (EvPageCache *page_cache,
273 const char *page_label)
279 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
280 g_return_val_if_fail (page_label != NULL, FALSE);
282 /* First, look for a literal label match */
283 for (i = 0; i < page_cache->n_pages; i ++) {
284 if (page_cache->page_labels[i] != NULL &&
285 ! strcmp (page_label, page_cache->page_labels[i])) {
286 ev_page_cache_set_current_page (page_cache, i);
291 /* Next, parse the label, and see if the number fits */
292 value = strtol (page_label, &endptr, 10);
293 if (endptr[0] == '\0') {
294 /* Page number is an integer */
295 page = MIN (G_MAXINT, value);
297 /* convert from a page label to a page offset */
300 page < page_cache->n_pages &&
301 page_cache->page_labels[page] == NULL) {
302 ev_page_cache_set_current_page (page_cache, page);
311 ev_page_cache_set_link (EvPageCache *page_cache,
314 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
315 g_return_if_fail (EV_IS_LINK (link));
317 ev_page_cache_set_current_page (page_cache, ev_link_get_page (link));
321 ev_page_cache_get_title (EvPageCache *page_cache)
323 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
325 return page_cache->title;
329 ev_page_cache_get_size (EvPageCache *page_cache,
335 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
336 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
338 if (page_cache->uniform) {
340 *width = page_cache->uniform_width;
342 *height = page_cache->uniform_height;
344 EvPageCacheInfo *info;
346 info = &(page_cache->size_cache [page]);
349 *width = info->width;
351 *height = info->height;
355 *width = (int) ((*width) * scale + 0.5);
357 *height = (int) ((*height) * scale + 0.5);
363 ev_page_cache_get_max_width (EvPageCache *page_cache,
367 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
370 *width = page_cache->max_width * scale;
374 ev_page_cache_get_max_height (EvPageCache *page_cache,
378 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
381 *height = page_cache->max_height * scale;
385 ev_page_cache_get_height_to_page (EvPageCache *page_cache,
392 double dual_result = 0.0;
394 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
397 result = page_cache->height_to_page [page - 1];
400 *height = result * scale;
403 dual_result = page_cache->dual_height_to_page [page / 2 - 1];
406 *dual_height = dual_result * scale;
410 ev_page_cache_get_max_label_chars (EvPageCache *page_cache)
412 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
414 return page_cache->max_label_chars;
418 ev_page_cache_get_page_label (EvPageCache *page_cache,
421 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
422 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
424 if (page_cache->page_labels[page] == NULL)
425 return g_strdup_printf ("%d", page + 1);
427 return g_strdup (page_cache->page_labels[page]);
431 ev_page_cache_has_nonnumeric_page_labels (EvPageCache *page_cache)
433 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
434 return page_cache->has_labels;
437 const EvDocumentInfo *
438 ev_page_cache_get_info (EvPageCache *page_cache)
440 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
442 return page_cache->page_info;
447 ev_page_cache_next_page (EvPageCache *page_cache)
449 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
451 if (page_cache->current_page >= page_cache->n_pages - 1)
454 ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
460 ev_page_cache_prev_page (EvPageCache *page_cache)
462 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
464 if (page_cache->current_page <= 0)
467 ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);