1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
6 typedef struct _EvPageCacheInfo
25 double uniform_height;
27 EvPageCacheInfo *size_cache;
30 struct _EvPageCacheClass
32 GObjectClass parent_class;
34 void (* page_changed) (EvPageCache *page_cache, gint page);
43 static guint signals[N_SIGNALS] = {0, };
45 static void ev_page_cache_init (EvPageCache *page_cache);
46 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
47 static void ev_page_cache_finalize (GObject *object);
49 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
52 ev_page_cache_init (EvPageCache *page_cache)
54 page_cache->current_page = 0;
58 ev_page_cache_class_init (EvPageCacheClass *class)
60 GObjectClass *object_class;
62 object_class = G_OBJECT_CLASS (class);
64 object_class->finalize = ev_page_cache_finalize;
66 signals [PAGE_CHANGED] =
67 g_signal_new ("page-changed",
70 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
72 g_cclosure_marshal_VOID__INT,
79 ev_page_cache_finalize (GObject *object)
81 EvPageCache *page_cache;
83 page_cache = EV_PAGE_CACHE (object);
85 g_free (page_cache->title);
86 g_free (page_cache->size_cache);
90 _ev_page_cache_new (EvDocument *document)
92 EvPageCache *page_cache;
93 EvPageCacheInfo *info;
96 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
98 g_mutex_lock (EV_DOC_MUTEX);
100 /* We read page information out of the document */
102 /* Assume all pages are the same size until proven otherwise */
103 page_cache->uniform = TRUE;
104 page_cache->n_pages = ev_document_get_n_pages (document);
105 page_cache->title = ev_document_get_title (document);
106 page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
108 for (i = 0; i < page_cache->n_pages; i++) {
109 double page_width = 0;
110 double page_height = 0;
112 ev_document_get_page_size (document, i, &page_width, &page_height);
113 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
116 page_cache->uniform_width = page_width;
117 page_cache->uniform_height = page_height;
118 } else if (page_cache->uniform &&
119 (page_cache->uniform_width != page_width ||
120 page_cache->uniform_height != page_height)) {
121 /* It's a different page size. Backfill the array. */
124 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
126 for (j = 1; j < i; j++) {
127 info = &(page_cache->size_cache [j - 1]);
128 info->width = page_width;
129 info->height = page_height;
131 page_cache->uniform = FALSE;
135 if (! page_cache->uniform) {
136 info = &(page_cache->size_cache [i - 1]);
138 info->width = page_width;
139 info->height = page_height;
143 /* make some sanity check assertions */
144 g_assert (page_cache->n_pages > 0);
145 if (! page_cache->uniform)
146 g_assert (page_cache->size_cache != NULL);
147 if (page_cache->uniform)
148 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
150 g_mutex_unlock (EV_DOC_MUTEX);
156 ev_page_cache_get_n_pages (EvPageCache *page_cache)
158 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
160 return page_cache->n_pages;
164 ev_page_cache_get_current_page (EvPageCache *page_cache)
166 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
168 return page_cache->current_page;
172 ev_page_cache_set_current_page (EvPageCache *page_cache,
175 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
176 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
178 if (page == page_cache->current_page)
181 page_cache->current_page = page;
182 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
186 ev_page_cache_set_page_label (EvPageCache *page_cache,
187 const char *page_label)
193 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
194 g_return_val_if_fail (page_label != NULL, FALSE);
196 /* First, look for a literal label match */
197 for (i = 0; i < page_cache->n_pages; i ++) {
198 if (page_cache->page_labels[i] != NULL &&
199 ! strcmp (page_label, page_cache->page_labels[i])) {
200 ev_page_cache_set_current_page (page_cache, i);
205 /* Next, parse the label, and see if the number fits */
206 value = strtol (page_label, &endptr, 10);
207 if (endptr[0] == '\0') {
208 /* Page number is an integer */
209 page = MIN (G_MAXINT, value);
211 /* convert from a page label to a page offset */
214 page < page_cache->n_pages &&
215 page_cache->page_labels[page] == NULL) {
216 ev_page_cache_set_current_page (page_cache, page);
225 ev_page_cache_set_link (EvPageCache *page_cache,
228 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
229 g_return_if_fail (EV_IS_LINK (link));
231 ev_page_cache_set_current_page (page_cache, ev_link_get_page (link));
235 ev_page_cache_get_title (EvPageCache *page_cache)
237 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
239 return page_cache->title;
243 ev_page_cache_get_size (EvPageCache *page_cache,
249 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
250 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
252 if (page_cache->uniform) {
254 *width = page_cache->uniform_width;
256 *height = page_cache->uniform_height;
258 EvPageCacheInfo *info;
260 info = &(page_cache->size_cache [page]);
263 *width = info->width;
265 *height = info->height;
269 *width = (*width) * scale;
271 *height = (*height) * scale;
275 ev_page_cache_get_page_label (EvPageCache *page_cache,
278 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
279 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
281 if (page_cache->page_labels[page] == NULL)
282 return g_strdup_printf ("%d", page + 1);
284 return g_strdup (page_cache->page_labels[page]);
289 ev_page_cache_next_page (EvPageCache *page_cache)
291 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
293 if (page_cache->current_page >= page_cache->n_pages - 1)
296 ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
302 ev_page_cache_prev_page (EvPageCache *page_cache)
304 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
306 if (page_cache->current_page <= 0)
309 ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);