1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
6 typedef struct _EvPageCacheInfo
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 ev_document_set_scale (document, 1.0);
109 for (i = 0; i < page_cache->n_pages; i++) {
111 gint page_height = 0;
113 ev_document_get_page_size (document, i, &page_width, &page_height);
114 page_cache->page_labels[i] = ev_document_get_page_label (document, i);
117 page_cache->uniform_width = page_width;
118 page_cache->uniform_height = page_height;
119 } else if (page_cache->uniform &&
120 (page_cache->uniform_width != page_width ||
121 page_cache->uniform_height != page_height)) {
122 /* It's a different page size. Backfill the array. */
125 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
127 for (j = 1; j < i; j++) {
128 info = &(page_cache->size_cache [j - 1]);
129 info->width = page_width;
130 info->height = page_height;
132 page_cache->uniform = FALSE;
136 if (! page_cache->uniform) {
137 info = &(page_cache->size_cache [i - 1]);
139 info->width = page_width;
140 info->height = page_height;
144 /* make some sanity check assertions */
145 g_assert (page_cache->n_pages > 0);
146 if (! page_cache->uniform)
147 g_assert (page_cache->size_cache != NULL);
148 if (page_cache->uniform)
149 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
151 g_mutex_unlock (EV_DOC_MUTEX);
157 ev_page_cache_get_n_pages (EvPageCache *page_cache)
159 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
161 return page_cache->n_pages;
165 ev_page_cache_get_current_page (EvPageCache *page_cache)
167 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
169 return page_cache->current_page;
173 ev_page_cache_set_current_page (EvPageCache *page_cache,
176 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
177 g_return_if_fail (page >= 0 || page < page_cache->n_pages);
179 if (page == page_cache->current_page)
182 page_cache->current_page = page;
183 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
187 ev_page_cache_set_page_label (EvPageCache *page_cache,
188 const char *page_label)
194 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
195 g_return_val_if_fail (page_label != NULL, FALSE);
197 /* First, look for a literal label match */
198 for (i = 0; i < page_cache->n_pages; i ++) {
199 if (page_cache->page_labels[i] != NULL &&
200 ! strcmp (page_label, page_cache->page_labels[i])) {
201 ev_page_cache_set_current_page (page_cache, i);
206 /* Next, parse the label, and see if the number fits */
207 value = strtol (page_label, &endptr, 10);
208 if (endptr[0] == '\0') {
209 /* Page number is an integer */
210 page = MIN (G_MAXINT, value);
212 /* convert from a page label to a page offset */
215 page < page_cache->n_pages &&
216 page_cache->page_labels[page] == NULL) {
217 ev_page_cache_set_current_page (page_cache, page);
226 ev_page_cache_set_link (EvPageCache *page_cache,
229 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
230 g_return_if_fail (EV_IS_LINK (link));
232 ev_page_cache_set_current_page (page_cache, ev_link_get_page (link));
236 ev_page_cache_get_title (EvPageCache *page_cache)
238 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
240 return page_cache->title;
244 ev_page_cache_get_size (EvPageCache *page_cache,
250 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
251 g_return_if_fail (page >= 0 && page < page_cache->n_pages);
253 if (page_cache->uniform) {
255 *width = page_cache->uniform_width;
257 *height = page_cache->uniform_height;
259 EvPageCacheInfo *info;
261 info = &(page_cache->size_cache [page]);
264 *width = info->width;
266 *height = info->height;
270 *width = (*width) * scale;
272 *height = (*height) * scale;
276 ev_page_cache_get_page_label (EvPageCache *page_cache,
279 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
280 g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
282 if (page_cache->page_labels[page] == NULL)
283 return g_strdup_printf ("%d", page + 1);
285 return g_strdup (page_cache->page_labels[page]);
290 ev_page_cache_next_page (EvPageCache *page_cache)
292 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
294 if (page_cache->current_page > page_cache->n_pages)
297 ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
303 ev_page_cache_prev_page (EvPageCache *page_cache)
305 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
307 if (page_cache->current_page <= 0)
310 ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);