diff options
Diffstat (limited to 'libview/ev-view.c')
| -rw-r--r-- | libview/ev-view.c | 176 |
1 files changed, 172 insertions, 4 deletions
diff --git a/libview/ev-view.c b/libview/ev-view.c index 7ee2e54..48b1081 100644 --- a/libview/ev-view.c +++ b/libview/ev-view.c @@ -323,6 +323,175 @@ static void ev_view_presentation_transition_stop (EvView G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT) +/* HeightToPage cache */ +#define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache" + +static void +build_height_to_page (EvHeightToPageCache *cache, + EvDocument *document, + gint rotation) +{ + 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 = (rotation == 90 || rotation == 270); + + uniform = ev_document_is_page_size_uniform (document); + n_pages = ev_document_get_n_pages (document); + dual_even_left = (n_pages > 2); + + g_free (cache->height_to_page); + g_free (cache->dual_height_to_page); + + cache->rotation = rotation; + cache->height_to_page = g_new0 (gdouble, n_pages + 1); + cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2); + + if (uniform) + ev_document_get_page_size (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; + cache->height_to_page[i] = i * uniform_height; + } else { + if (i < n_pages) { + gdouble w, h; + + ev_document_get_page_size (document, i, &w, &h); + page_height = swap ? w : h; + } else { + page_height = 0; + } + cache->height_to_page[i] = saved_height; + saved_height += page_height; + } + } + + if (dual_even_left && !uniform) { + gdouble w, h; + + ev_document_get_page_size (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; + cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height; + if (i + 1 < n_pages + 2) + 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 (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 (document, i, &w, &h); + page_height = swap ? w : h; + } else { + page_height = 0; + } + + if (i + 1 < n_pages + 2) { + cache->dual_height_to_page[i] = saved_height; + cache->dual_height_to_page[i + 1] = saved_height; + saved_height += MAX(page_height, next_page_height); + } else { + cache->dual_height_to_page[i] = saved_height; + } + } + } +} + +static void +ev_height_to_page_cache_get_height (EvHeightToPageCache *cache, + EvDocument *document, + gint page, + gint rotation, + gdouble *height, + gdouble *dual_height) +{ + if (cache->rotation != rotation) + build_height_to_page (cache, document, rotation); + + *height = cache->height_to_page[page]; + *dual_height = cache->dual_height_to_page[page]; +} + +static void +ev_height_to_page_cache_free (EvHeightToPageCache *cache) +{ + if (cache->height_to_page) { + g_free (cache->height_to_page); + cache->height_to_page = NULL; + } + + if (cache->dual_height_to_page) { + g_free (cache->dual_height_to_page); + cache->dual_height_to_page = NULL; + } + g_free (cache); +} + +static EvHeightToPageCache * +ev_view_get_height_to_page_cache (EvView *view) +{ + EvHeightToPageCache *cache; + + if (!view->document) + return NULL; + + cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY); + if (!cache) { + cache = g_new0 (EvHeightToPageCache, 1); + build_height_to_page (cache, view->document, view->rotation); + g_object_set_data_full (G_OBJECT (view->document), + EV_HEIGHT_TO_PAGE_CACHE_KEY, + cache, + (GDestroyNotify)ev_height_to_page_cache_free); + } + + return cache; +} + +static void +ev_view_get_height_to_page (EvView *view, + gint page, + gint *height, + gint *dual_height) +{ + gdouble h, dh; + + if (!view->height_to_page_cache) + return; + + ev_height_to_page_cache_get_height (view->height_to_page_cache, + view->document, + page, + view->rotation, + &h, &dh); + if (height) + *height = (gint)(h * view->scale + 0.5); + + if (dual_height) + *dual_height = (gint)(dh * view->scale + 0.5); +} + static void scroll_to_current_page (EvView *view, GtkOrientation orientation) { @@ -748,12 +917,10 @@ get_page_y_offset (EvView *view, int page, double zoom, int *y_offset) compute_border (view, max_width, max_width, &border); if (view->dual_page) { - ev_page_cache_get_height_to_page (view->page_cache, page, - view->rotation, zoom, NULL, &offset); + ev_view_get_height_to_page (view, page, NULL, &offset); offset += ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 + 1) * view->spacing + ((page + ev_page_cache_get_dual_even_left (view->page_cache)) / 2 ) * (border.top + border.bottom); } else { - ev_page_cache_get_height_to_page (view->page_cache, page, - view->rotation, zoom, &offset, NULL); + ev_view_get_height_to_page (view, page, &offset, NULL); offset += (page + 1) * view->spacing + page * (border.top + border.bottom); } @@ -4758,6 +4925,7 @@ static void setup_caches (EvView *view) { view->page_cache = ev_page_cache_get (view->document); + view->height_to_page_cache = ev_view_get_height_to_page_cache (view); g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view); view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document); g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view); |