Add Continuous and Dual page modes.

[evince.git] / backend / ev-page-cache.c

diff --git a/backend/ev-page-cache.c b/backend/ev-page-cache.c
index a6d78228b5d82d455cad9de47a1e7cd2470ad822..6e559cb30929ca8a4bd22d6444c8b96daac20b16 100644 (file)
--- a/backend/ev-page-cache.c
+++ b/backend/ev-page-cache.c
@@ -24,6 +24,11 @@ struct _EvPageCache
        double uniform_width;
        double uniform_height;
 
+       double max_width_page_width;
+       double max_width_page_height;
+       double max_height_page_width;
+       double max_height_page_height;
+
        EvPageCacheInfo *size_cache;
 };
 
@@ -104,6 +109,10 @@ _ev_page_cache_new (EvDocument *document)
        page_cache->uniform = TRUE;
        page_cache->n_pages = ev_document_get_n_pages (document);
        page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
+       page_cache->max_width_page_width = 0;
+       page_cache->max_width_page_height = 0;
+       page_cache->max_height_page_width = 0;
+       page_cache->max_height_page_height = 0;
 
        doc_info = ev_document_get_info (document);
        if (doc_info->fields_mask & EV_DOCUMENT_INFO_TITLE) {
@@ -120,6 +129,16 @@ _ev_page_cache_new (EvDocument *document)
                ev_document_get_page_size (document, i, &page_width, &page_height);
                page_cache->page_labels[i] = ev_document_get_page_label (document, i);
 
+               if (page_width > page_cache->max_width_page_width) {
+                       page_cache->max_width_page_width = page_width;
+                       page_cache->max_width_page_height = page_height;
+               }
+
+               if (page_height > page_cache->max_height_page_height) {
+                       page_cache->max_height_page_width = page_width;
+                       page_cache->max_height_page_height = page_height;
+               }
+
                if (i == 0) {
                        page_cache->uniform_width = page_width;
                        page_cache->uniform_height = page_height;
@@ -151,6 +170,8 @@ _ev_page_cache_new (EvDocument *document)
        /* make some sanity check assertions */
        if (! page_cache->uniform)
                g_assert (page_cache->size_cache != NULL);
+       if (page_cache->uniform)
+               g_assert (page_cache->uniform_width > 0 && page_cache->uniform_height > 0);
 
        ev_document_doc_mutex_unlock ();
 
@@ -279,6 +300,39 @@ ev_page_cache_get_size (EvPageCache *page_cache,
                *height = (*height) * scale;
 
 }
+
+
+/* Note that these aren't necessarily from the same page.
+ */
+void
+ev_page_cache_get_max_width_size (EvPageCache *page_cache,
+                                 gfloat       scale,
+                                 gint        *width,
+                                 gint        *height)
+{
+       g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
+
+       if (width)
+               *width = page_cache->max_width_page_width * scale;
+       if (height)
+               *height = page_cache->max_width_page_height * scale;
+}
+
+void
+ev_page_cache_get_max_height_size (EvPageCache *page_cache,
+                                  gfloat       scale,
+                                  gint        *width,
+                                  gint        *height)
+{
+       g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
+
+       if (width)
+               *width = page_cache->max_height_page_width * scale;
+       if (height)
+               *height = page_cache->max_height_page_height * scale;
+}
+
+
 gchar *
 ev_page_cache_get_page_label (EvPageCache *page_cache,
                              gint         page)