1 files changed, 330 insertions, 0 deletions
diff --git a/libview/ev-page-cache.c b/libview/ev-page-cache.c
new file mode 100644
index 0000000..9835caa
--- /dev/null
+++ b/libview/ev-page-cache.c
@@ -0,0 +1,330 @@
+/* this file is part of evince, a gnome document viewer
+ *
+ *  Copyright (C) 2009 Carlos Garcia Campos
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include "ev-jobs.h"
+#include "ev-job-scheduler.h"
+#include "ev-mapping.h"
+#include "ev-selection.h"
+#include "ev-document-links.h"
+#include "ev-document-forms.h"
+#include "ev-document-images.h"
+#include "ev-document-annotations.h"
+#include "ev-page-cache.h"
+
+typedef struct _EvPageCacheData {
+	EvJob     *job;
+	gboolean   done : 1;
+
+	GList     *link_mapping;
+	GList     *image_mapping;
+	GList     *form_field_mapping;
+	GList     *annot_mapping;
+	GdkRegion *text_mapping;
+} EvPageCacheData;
+
+struct _EvPageCache {
+	GObject parent;
+
+	EvDocument        *document;
+	EvPageCacheData   *page_list;
+	gint               n_pages;
+	EvJobPageDataFlags flags;
+};
+
+struct _EvPageCacheClass {
+	GObjectClass parent_class;
+};
+
+static void job_page_data_finished_cb (EvJob       *job,
+				       EvPageCache *cache);
+
+G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
+
+static void
+ev_page_cache_data_free (EvPageCacheData *data)
+{
+	if (data->job) {
+		g_object_unref (data->job);
+		data->job = NULL;
+	}
+
+	if (data->link_mapping) {
+		ev_mapping_list_free (data->link_mapping, g_object_unref);
+		data->link_mapping = NULL;
+	}
+
+	if (data->image_mapping) {
+		ev_mapping_list_free (data->image_mapping, g_object_unref);
+		data->image_mapping = NULL;
+	}
+
+	if (data->form_field_mapping) {
+		ev_mapping_list_free (data->form_field_mapping, g_object_unref);
+		data->form_field_mapping = NULL;
+	}
+
+	if (data->annot_mapping) {
+		ev_mapping_list_free (data->annot_mapping, g_object_unref);
+		data->annot_mapping = NULL;
+	}
+
+	if (data->text_mapping) {
+		gdk_region_destroy (data->text_mapping);
+		data->text_mapping = NULL;
+	}
+}
+
+static void
+ev_page_cache_finalize (GObject *object)
+{
+	EvPageCache *cache = EV_PAGE_CACHE (object);
+	gint         i;
+
+	if (cache->page_list) {
+		for (i = 0; i < cache->n_pages; i++) {
+			EvPageCacheData *data;
+
+			data = &cache->page_list[i];
+
+			if (data->job)
+				g_signal_handlers_disconnect_by_func (data->job,
+								      G_CALLBACK (job_page_data_finished_cb),
+								      cache);
+			ev_page_cache_data_free (data);
+		}
+
+		g_free (cache->page_list);
+		cache->page_list = NULL;
+		cache->n_pages = 0;
+	}
+
+	if (cache->document) {
+		g_object_unref (cache->document);
+		cache->document = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_page_cache_parent_class)->finalize (object);
+}
+
+static void
+ev_page_cache_init (EvPageCache *cache)
+{
+}
+
+static void
+ev_page_cache_class_init (EvPageCacheClass *klass)
+{
+	GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
+
+	g_object_class->finalize = ev_page_cache_finalize;
+}
+
+static EvJobPageDataFlags
+get_flags_for_document (EvDocument *document)
+{
+	EvJobPageDataFlags flags = EV_PAGE_DATA_INCLUDE_NONE;
+
+	if (EV_IS_DOCUMENT_LINKS (document))
+		flags |= EV_PAGE_DATA_INCLUDE_LINKS;
+	if (EV_IS_DOCUMENT_IMAGES (document))
+		flags |= EV_PAGE_DATA_INCLUDE_IMAGES;
+	if (EV_IS_DOCUMENT_FORMS (document))
+		flags |= EV_PAGE_DATA_INCLUDE_FORMS;
+	if (EV_IS_DOCUMENT_ANNOTATIONS (document))
+		flags |= EV_PAGE_DATA_INCLUDE_ANNOTS;
+	if (EV_IS_SELECTION (document))
+		flags |= EV_PAGE_DATA_INCLUDE_TEXT;
+
+	return flags;
+}
+
+EvPageCache *
+ev_page_cache_new (EvDocument *document)
+{
+	EvPageCache *cache;
+
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
+
+	cache = EV_PAGE_CACHE (g_object_new (EV_TYPE_PAGE_CACHE, NULL));
+	cache->document = g_object_ref (document);
+	cache->n_pages = ev_document_get_n_pages (document);
+	cache->flags = get_flags_for_document (document);
+
+	if (cache->flags != EV_PAGE_DATA_INCLUDE_NONE) {
+		cache->page_list = g_new0 (EvPageCacheData, cache->n_pages);
+	}
+
+	return cache;
+}
+
+static void
+job_page_data_finished_cb (EvJob       *job,
+			   EvPageCache *cache)
+{
+	EvJobPageData   *job_data = EV_JOB_PAGE_DATA (job);
+	EvPageCacheData *data;
+
+	data = &cache->page_list[job_data->page];
+	data->link_mapping = job_data->link_mapping;
+	data->image_mapping = job_data->image_mapping;
+	data->form_field_mapping = job_data->form_field_mapping;
+	data->annot_mapping = job_data->annot_mapping;
+	data->text_mapping = job_data->text_mapping;
+	data->done = TRUE;
+
+	g_object_unref (data->job);
+	data->job = NULL;
+}
+
+void
+ev_page_cache_set_page_range (EvPageCache *cache,
+			      gint         start,
+			      gint         end)
+{
+	gint i;
+
+	if (cache->flags == EV_PAGE_DATA_INCLUDE_NONE)
+		return;
+
+	for (i = start; i <= end; i++) {
+		EvPageCacheData *data = &cache->page_list[i];
+
+		if (data->done || data->job)
+			continue;
+
+		data->job = ev_job_page_data_new (cache->document, i, cache->flags);
+		g_signal_connect (data->job, "finished",
+				  G_CALLBACK (job_page_data_finished_cb),
+				  cache);
+		ev_job_scheduler_push_job (data->job, EV_JOB_PRIORITY_NONE);
+	}
+}
+
+GList *
+ev_page_cache_get_link_mapping (EvPageCache *cache,
+				gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), NULL);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, NULL);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_LINKS))
+		return NULL;
+
+	data = &cache->page_list[page];
+	if (data->done)
+		return data->link_mapping;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->link_mapping;
+
+	return data->link_mapping;
+}
+
+GList *
+ev_page_cache_get_image_mapping (EvPageCache *cache,
+				 gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), NULL);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, NULL);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_IMAGES))
+		return NULL;
+
+	data = &cache->page_list[page];
+	if (data->done)
+		return data->image_mapping;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->image_mapping;
+
+	return data->image_mapping;
+}
+
+GList *
+ev_page_cache_get_form_field_mapping (EvPageCache *cache,
+				      gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), NULL);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, NULL);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_FORMS))
+		return NULL;
+
+	data = &cache->page_list[page];
+	if (data->done)
+		return data->form_field_mapping;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->form_field_mapping;
+
+	return data->form_field_mapping;
+}
+
+GList *
+ev_page_cache_get_annot_mapping (EvPageCache *cache,
+				 gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), NULL);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, NULL);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_ANNOTS))
+		return NULL;
+
+	data = &cache->page_list[page];
+	if (data->done)
+		return data->annot_mapping;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->annot_mapping;
+
+	return data->annot_mapping;
+}
+
+GdkRegion *
+ev_page_cache_get_text_mapping (EvPageCache *cache,
+				gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), NULL);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, NULL);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_TEXT))
+		return NULL;
+
+	data = &cache->page_list[page];
+	if (data->done)
+		return data->text_mapping;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->text_mapping;
+
+	return data->text_mapping;
+}
+