1 #include "ev-page-cache.h"
2 #include "ev-job-queue.h"
4 typedef struct _EvPageCacheInfo
24 EvPageCacheInfo *size_cache;
27 struct _EvPageCacheClass
29 GObjectClass parent_class;
31 void (* page_changed) (EvPageCache *page_cache, gint page);
40 static guint signals[N_SIGNALS] = {0, };
42 static void ev_page_cache_init (EvPageCache *page_cache);
43 static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
44 static void ev_page_cache_finalize (GObject *object);
46 G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
49 ev_page_cache_init (EvPageCache *page_cache)
51 page_cache->current_page = 1;
55 ev_page_cache_class_init (EvPageCacheClass *class)
57 GObjectClass *object_class;
59 object_class = G_OBJECT_CLASS (class);
61 object_class->finalize = ev_page_cache_finalize;
63 signals [PAGE_CHANGED] =
64 g_signal_new ("page-changed",
67 G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
69 g_cclosure_marshal_VOID__INT,
76 ev_page_cache_finalize (GObject *object)
78 EvPageCache *page_cache;
80 page_cache = EV_PAGE_CACHE (object);
82 g_free (page_cache->title);
83 g_free (page_cache->size_cache);
87 _ev_page_cache_new (EvDocument *document)
89 EvPageCache *page_cache;
90 EvPageCacheInfo *info;
93 page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
95 g_mutex_lock (EV_DOC_MUTEX);
97 /* We read page information out of the document */
99 /* Assume all pages are the same size until proven otherwise */
100 page_cache->uniform = TRUE;
101 page_cache->n_pages = ev_document_get_n_pages (document);
102 page_cache->title = ev_document_get_title (document);
104 ev_document_set_scale (document, 1.0);
105 for (i = 1; i <= page_cache->n_pages; i++) {
107 gint page_height = 0;
109 ev_document_get_page_size (document, i, &page_width, &page_height);
112 page_cache->uniform_width = page_width;
113 page_cache->uniform_height = page_height;
114 } else if (page_cache->uniform &&
115 (page_cache->uniform_width != page_width ||
116 page_cache->uniform_height != page_height)) {
117 /* It's a different page size. Backfill the array. */
120 page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
122 for (j = 1; j < i; j++) {
123 info = &(page_cache->size_cache [j - 1]);
124 info->width = page_width;
125 info->height = page_height;
127 page_cache->uniform = FALSE;
131 if (! page_cache->uniform) {
132 info = &(page_cache->size_cache [i - 1]);
134 info->width = page_width;
135 info->height = page_height;
139 /* make some sanity check assertions */
140 g_assert (page_cache->n_pages > 0);
141 if (! page_cache->uniform)
142 g_assert (page_cache->size_cache != NULL);
143 if (page_cache->uniform)
144 g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
146 g_mutex_unlock (EV_DOC_MUTEX);
152 ev_page_cache_get_n_pages (EvPageCache *page_cache)
154 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
156 return page_cache->n_pages;
160 ev_page_cache_get_current_page (EvPageCache *page_cache)
162 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
164 return page_cache->current_page;
168 ev_page_cache_set_current_page (EvPageCache *page_cache,
171 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
172 g_return_if_fail (page > 0 || page <= page_cache->n_pages);
174 if (page == page_cache->current_page)
177 page_cache->current_page = page;
178 g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
182 ev_page_cache_set_link (EvPageCache *page_cache,
185 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
186 g_return_if_fail (EV_IS_LINK (link));
188 ev_page_cache_set_current_page (page_cache, ev_link_get_page (link));
192 ev_page_cache_get_title (EvPageCache *page_cache)
194 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
196 return page_cache->title;
200 ev_page_cache_get_size (EvPageCache *page_cache,
206 g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
207 g_return_if_fail (page > 0 && page <= page_cache->n_pages);
209 if (page_cache->uniform) {
211 *width = page_cache->uniform_width;
213 *height = page_cache->uniform_height;
215 EvPageCacheInfo *info;
217 info = &(page_cache->size_cache [page - 1]);
220 *width = info->width;
222 *height = info->height;
226 *width = (*width) * scale;
228 *height = (*height) * scale;
233 ev_page_cache_next_page (EvPageCache *page_cache)
235 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
237 if (page_cache->current_page >= page_cache->n_pages)
240 ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
246 ev_page_cache_prev_page (EvPageCache *page_cache)
248 g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
250 if (page_cache->current_page <= 1)
253 ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);