#include <stdlib.h>
#include <string.h>
-#define THUMBNAIL_WIDTH 100
-
-typedef struct _EvPageThumbsInfo
-{
- gint width;
- gint height;
-} EvPageThumbsInfo;
-
struct _EvPageCache
{
GObject parent;
gboolean dual_even_left;
- double* height_to_page;
- double* dual_height_to_page;
-
int rotation;
-
- /* Thumbnail dimensions */
- gboolean thumbs_uniform;
- gint thumbs_uniform_width;
- gint thumbs_uniform_height;
- gint thumbs_max_width;
- gint thumbs_max_height;
- EvPageThumbsInfo *thumbs_size_cache;
};
struct _EvPageCacheClass
page_cache->document = NULL;
- if (page_cache->thumbs_size_cache) {
- g_free (page_cache->thumbs_size_cache);
- page_cache->thumbs_size_cache = NULL;
- }
-
- if (page_cache->height_to_page) {
- g_free (page_cache->height_to_page);
- page_cache->height_to_page = NULL;
- }
-
- if (page_cache->dual_height_to_page) {
- g_free (page_cache->dual_height_to_page);
- page_cache->dual_height_to_page = NULL;
- }
-
G_OBJECT_CLASS (ev_page_cache_parent_class)->finalize (object);
}
-static void
-build_height_to_page (EvPageCache *page_cache)
-{
- gboolean swap, uniform, dual_even_left;
- int i;
- double uniform_height, page_height, next_page_height;
- double saved_height;
- gdouble u_width, u_height;
- gint n_pages;
-
- swap = (page_cache->rotation == 90 ||
- page_cache->rotation == 270);
-
- uniform = ev_document_is_page_size_uniform (page_cache->document);
- n_pages = ev_document_get_n_pages (page_cache->document);
- dual_even_left = (n_pages > 2);
-
- g_free (page_cache->height_to_page);
- g_free (page_cache->dual_height_to_page);
-
- page_cache->height_to_page = g_new0 (double, n_pages + 1);
- page_cache->dual_height_to_page = g_new0 (double, n_pages + 2);
-
- if (uniform)
- ev_document_get_page_size (page_cache->document, 0, &u_width, &u_height);
-
- saved_height = 0;
- for (i = 0; i <= n_pages; i++) {
- if (uniform) {
- uniform_height = swap ? u_width : u_height;
- page_cache->height_to_page[i] = i * uniform_height;
- } else {
- if (i < n_pages) {
- gdouble w, h;
-
- ev_document_get_page_size (page_cache->document, i, &w, &h);
- page_height = swap ? w : h;
- } else {
- page_height = 0;
- }
- page_cache->height_to_page[i] = saved_height;
- saved_height += page_height;
- }
- }
-
- if (dual_even_left && !uniform) {
- gdouble w, h;
-
- ev_document_get_page_size (page_cache->document, 0, &w, &h);
- saved_height = swap ? w : h;
- } else {
- saved_height = 0;
- }
-
- for (i = dual_even_left; i < n_pages + 2; i += 2) {
- if (uniform) {
- uniform_height = swap ? u_width : u_height;
- page_cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
- if (i + 1 < n_pages + 2)
- page_cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
- } else {
- if (i + 1 < n_pages) {
- gdouble w, h;
-
- ev_document_get_page_size (page_cache->document, i + 1, &w, &h);
- next_page_height = swap ? w : h;
- } else {
- next_page_height = 0;
- }
-
- if (i < n_pages) {
- gdouble w, h;
-
- ev_document_get_page_size (page_cache->document, i, &w, &h);
- page_height = swap ? w : h;
- } else {
- page_height = 0;
- }
-
- if (i + 1 < n_pages + 2) {
- page_cache->dual_height_to_page[i] = saved_height;
- page_cache->dual_height_to_page[i + 1] = saved_height;
- saved_height += MAX(page_height, next_page_height);
- } else {
- page_cache->dual_height_to_page[i] = saved_height;
- }
- }
- }
-}
-
static EvPageCache *
ev_page_cache_new (EvDocument *document)
{
EvPageCache *page_cache;
- EvPageThumbsInfo *thumb_info;
- EvRenderContext *rc = NULL;
- gint i, n_pages;
page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
page_cache->document = document;
- n_pages = ev_document_get_n_pages (document);
-
- build_height_to_page (page_cache);
-
- if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
- if (n_pages > 0)
- ev_page_cache_set_current_page (page_cache, 0);
- return page_cache;
- }
-
- /* Assume all pages are the same size until proven otherwise */
- page_cache->thumbs_uniform = TRUE;
-
- for (i = 0; i < n_pages; i++) {
- EvPage *page;
- gdouble page_width, page_height;
- gint thumb_width = 0;
- gint thumb_height = 0;
-
- page = ev_document_get_page (document, i);
-
- ev_document_get_page_size (document, i, &page_width, &page_height);
-
- if (!rc) {
- rc = ev_render_context_new (page, 0, (gdouble)THUMBNAIL_WIDTH / page_width);
- } else {
- ev_render_context_set_page (rc, page);
- ev_render_context_set_scale (rc, (gdouble)THUMBNAIL_WIDTH / page_width);
- }
-
- ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (document),
- rc, &thumb_width, &thumb_height);
-
- if (thumb_width > page_cache->thumbs_max_width) {
- page_cache->thumbs_max_width = thumb_width;
- }
-
- if (thumb_height > page_cache->thumbs_max_height) {
- page_cache->thumbs_max_height = thumb_height;
- }
-
- if (i == 0) {
- page_cache->thumbs_uniform_width = thumb_width;
- page_cache->thumbs_uniform_height = thumb_height;
- } else if (page_cache->thumbs_uniform &&
- (page_cache->thumbs_uniform_width != thumb_width ||
- page_cache->thumbs_uniform_height != thumb_height)) {
- /* It's a different thumbnail size. Backfill the array. */
- int j;
-
- page_cache->thumbs_size_cache = g_new0 (EvPageThumbsInfo, n_pages);
-
- for (j = 0; j < i; j++) {
- thumb_info = &(page_cache->thumbs_size_cache[j]);
- thumb_info->width = page_cache->thumbs_uniform_width;
- thumb_info->height = page_cache->thumbs_uniform_height;
- }
- page_cache->thumbs_uniform = FALSE;
- }
-
- if (! page_cache->thumbs_uniform) {
- thumb_info = &(page_cache->thumbs_size_cache[i]);
-
- thumb_info->width = thumb_width;
- thumb_info->height = thumb_height;
- }
-
- g_object_unref (page);
- }
-
- if (rc) {
- g_object_unref (rc);
- }
-
- if (n_pages > 0)
+ if (ev_document_get_n_pages (page_cache->document) > 0)
ev_page_cache_set_current_page (page_cache, 0);
return page_cache;
}
-gboolean
-ev_page_cache_check_dimensions (EvPageCache *page_cache)
-{
- gdouble document_width, document_height;
-
- ev_document_get_max_page_size (page_cache->document,
- &document_width, &document_height);
-
- return (document_width > 0 && document_height > 0);
-}
-
gint
ev_page_cache_get_current_page (EvPageCache *page_cache)
{
*height = (rotation == 0 || rotation == 180) ? h * scale : w * scale;
}
-void
-ev_page_cache_get_height_to_page (EvPageCache *page_cache,
- gint page,
- gint rotation,
- gfloat scale,
- gint *height,
- gint *dual_height)
-{
- g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
- g_return_if_fail (page >= 0);
-
- if (page_cache->rotation != rotation) {
- page_cache->rotation = rotation;
- build_height_to_page (page_cache);
- }
-
- if (height)
- *height = page_cache->height_to_page[page] * scale;
-
- if (dual_height)
- *dual_height = page_cache->dual_height_to_page[page] * scale;
-}
-
-void
-ev_page_cache_get_thumbnail_size (EvPageCache *page_cache,
- gint page,
- gint rotation,
- gint *width,
- gint *height)
-{
- gint w, h;
-
- g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
-
- if (page_cache->thumbs_uniform) {
- w = page_cache->thumbs_uniform_width;
- h = page_cache->thumbs_uniform_height;
- } else {
- EvPageThumbsInfo *info;
-
- info = &(page_cache->thumbs_size_cache [page]);
-
- w = info->width;
- h = info->height;
- }
-
- if (rotation == 0 || rotation == 180) {
- if (width) *width = w;
- if (height) *height = h;
- } else {
- if (width) *width = h;
- if (height) *height = w;
- }
-}
-
-gboolean
-ev_page_cache_get_dual_even_left (EvPageCache *page_cache)
-{
- g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
-
- return (ev_document_get_n_pages (page_cache->document) > 2);
-}
-
#define PAGE_CACHE_STRING "ev-page-cache"
EvPageCache *
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff