Set current page to 0 if document has pages

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

diff --git a/backend/ev-page-cache.c b/backend/ev-page-cache.c
index e2771b66c32d7b0d25d1c81d92c4d0d6eeb72be8..491e0742a7b706f2b0c77161afa829928b1c23a4 100644 (file)
--- a/backend/ev-page-cache.c
+++ b/backend/ev-page-cache.c
@@ -1,10 +1,12 @@
 #include "ev-page-cache.h"
 #include "ev-job-queue.h"
+#include <stdlib.h>
+#include <string.h>
 
 typedef struct _EvPageCacheInfo
 {
-       gint width;
-       gint height;
+       double width;
+       double height;
 }
 EvPageCacheInfo;
 
@@ -16,10 +18,11 @@ struct _EvPageCache
        gint current_page;
        int n_pages;
        char *title;
+       char **page_labels;
 
        gboolean uniform;
-       gint uniform_width;
-       gint uniform_height;
+       double uniform_width;
+       double uniform_height;
 
        EvPageCacheInfo *size_cache;
 };
@@ -48,7 +51,7 @@ G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
 static void
 ev_page_cache_init (EvPageCache *page_cache)
 {
-       page_cache->current_page = 1;
+       page_cache->current_page = -1;
 }
 
 static void
@@ -100,15 +103,16 @@ _ev_page_cache_new (EvDocument *document)
        page_cache->uniform = TRUE;
        page_cache->n_pages = ev_document_get_n_pages (document);
        page_cache->title = ev_document_get_title (document);
+       page_cache->page_labels = g_new0 (char *, page_cache->n_pages);
 
-       ev_document_set_scale (document, 1.0);
-       for (i = 1; i <= page_cache->n_pages; i++) {
-               gint page_width = 0;
-               gint page_height = 0;
+       for (i = 0; i < page_cache->n_pages; i++) {
+               double page_width = 0;
+               double page_height = 0;
 
                ev_document_get_page_size (document, i, &page_width, &page_height);
+               page_cache->page_labels[i] = ev_document_get_page_label (document, i);
 
-               if (i == 1) {
+               if (i == 0) {
                        page_cache->uniform_width = page_width;
                        page_cache->uniform_height = page_height;
                } else if (page_cache->uniform &&
@@ -119,17 +123,17 @@ _ev_page_cache_new (EvDocument *document)
 
                        page_cache->size_cache = g_new0 (EvPageCacheInfo, page_cache->n_pages);
 
-                       for (j = 1; j < i; j++) {
-                               info = &(page_cache->size_cache [j - 1]);
-                               info->width = page_width;
-                               info->height = page_height;
+                       for (j = 0; j < i; j++) {
+                               info = &(page_cache->size_cache [j]);
+                               info->width = page_cache->uniform_width;
+                               info->height = page_cache->uniform_height;
                        }
                        page_cache->uniform = FALSE;
 
                }
 
                if (! page_cache->uniform) {
-                       info = &(page_cache->size_cache [i - 1]);
+                       info = &(page_cache->size_cache [i]);
 
                        info->width = page_width;
                        info->height = page_height;
@@ -137,14 +141,14 @@ _ev_page_cache_new (EvDocument *document)
        }
 
        /* make some sanity check assertions */
-       g_assert (page_cache->n_pages > 0);
        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);
 
        g_mutex_unlock (EV_DOC_MUTEX);
 
+       if (page_cache->n_pages > 0)
+               ev_page_cache_set_current_page (page_cache, 0);
+
        return page_cache;
 }
 
@@ -169,7 +173,7 @@ ev_page_cache_set_current_page (EvPageCache *page_cache,
                                int          page)
 {
        g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
-       g_return_if_fail (page > 0 || page <= page_cache->n_pages);
+       g_return_if_fail (page >= 0 || page < page_cache->n_pages);
 
        if (page == page_cache->current_page)
                return;
@@ -178,6 +182,45 @@ ev_page_cache_set_current_page (EvPageCache *page_cache,
        g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
 }
 
+gboolean
+ev_page_cache_set_page_label (EvPageCache *page_cache,
+                             const char  *page_label)
+{
+       gint i, page;
+       long value;
+       char *endptr = NULL;
+       
+       g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
+       g_return_val_if_fail (page_label != NULL, FALSE);
+
+       /* First, look for a literal label match */
+       for (i = 0; i < page_cache->n_pages; i ++) {
+               if (page_cache->page_labels[i] != NULL &&
+                   ! strcmp (page_label, page_cache->page_labels[i])) {
+                       ev_page_cache_set_current_page (page_cache, i);
+                       return TRUE;
+               }
+       }
+
+       /* Next, parse the label, and see if the number fits */
+       value = strtol (page_label, &endptr, 10);
+       if (endptr[0] == '\0') {
+               /* Page number is an integer */
+               page = MIN (G_MAXINT, value);
+
+               /* convert from a page label to a page offset */
+               page --;
+               if (page >= 0 &&
+                   page < page_cache->n_pages &&
+                   page_cache->page_labels[page] == NULL) {
+                       ev_page_cache_set_current_page (page_cache, page);
+                       return TRUE;
+               }
+       }
+
+       return FALSE;
+}
+
 void
 ev_page_cache_set_link (EvPageCache *page_cache,
                        EvLink      *link)
@@ -204,7 +247,7 @@ ev_page_cache_get_size (EvPageCache *page_cache,
                        gint        *height)
 {
        g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
-       g_return_if_fail (page > 0 && page <= page_cache->n_pages);
+       g_return_if_fail (page >= 0 && page < page_cache->n_pages);
 
        if (page_cache->uniform) {
                if (width)
@@ -214,7 +257,7 @@ ev_page_cache_get_size (EvPageCache *page_cache,
        } else {
                EvPageCacheInfo *info;
 
-               info = &(page_cache->size_cache [page - 1]);
+               info = &(page_cache->size_cache [page]);
                
                if (width)
                        *width = info->width;
@@ -228,13 +271,26 @@ ev_page_cache_get_size (EvPageCache *page_cache,
                *height = (*height) * scale;
 
 }
+gchar *
+ev_page_cache_get_page_label (EvPageCache *page_cache,
+                             gint         page)
+{
+       g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), NULL);
+       g_return_val_if_fail (page >= 0 && page < page_cache->n_pages, NULL);
+
+       if (page_cache->page_labels[page] == NULL)
+               return g_strdup_printf ("%d", page + 1);
+
+       return g_strdup (page_cache->page_labels[page]);
+}
+
 
 gboolean
 ev_page_cache_next_page (EvPageCache *page_cache)
 {
        g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
 
-       if (page_cache->current_page >= page_cache->n_pages)
+       if (page_cache->current_page >= page_cache->n_pages - 1)
                return FALSE;
 
        ev_page_cache_set_current_page (page_cache, page_cache->current_page + 1);
@@ -247,7 +303,7 @@ ev_page_cache_prev_page (EvPageCache *page_cache)
 {
        g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
 
-       if (page_cache->current_page <= 1)
+       if (page_cache->current_page <= 0)
                return FALSE;
 
        ev_page_cache_set_current_page (page_cache, page_cache->current_page - 1);