1 files changed, 521 insertions, 0 deletions

diff --git a/libview/ev-page-cache.c b/libview/ev-page-cache.c
new file mode 100644
index 00000000..c4dc062c
--- /dev/null
+++ b/libview/ev-page-cache.c
@@ -0,0 +1,521 @@
+/* this file is part of evince, a mate 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+
+#include <glib.h>
+#include "ev-jobs.h"
+#include "ev-job-scheduler.h"
+#include "ev-mapping-list.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-document-text.h"
+#include "ev-page-cache.h"
+
+typedef struct _EvPageCacheData {
+	EvJob             *job;
+	gboolean           done : 1;
+	gboolean           dirty : 1;
+	EvJobPageDataFlags flags;
+
+	EvMappingList     *link_mapping;
+	EvMappingList     *image_mapping;
+	EvMappingList     *form_field_mapping;
+	EvMappingList     *annot_mapping;
+	cairo_region_t    *text_mapping;
+	EvRectangle       *text_layout;
+	guint              text_layout_length;
+	gchar             *text;
+} EvPageCacheData;
+
+struct _EvPageCache {
+	GObject parent;
+
+	EvDocument        *document;
+	EvPageCacheData   *page_list;
+	gint               n_pages;
+
+	/* Current range */
+	gint               start_page;
+	gint               end_page;
+
+	EvJobPageDataFlags flags;
+};
+
+struct _EvPageCacheClass {
+	GObjectClass parent_class;
+};
+
+#define EV_PAGE_DATA_FLAGS_DEFAULT (        \
+	EV_PAGE_DATA_INCLUDE_LINKS        | \
+	EV_PAGE_DATA_INCLUDE_TEXT_MAPPING | \
+	EV_PAGE_DATA_INCLUDE_IMAGES       | \
+	EV_PAGE_DATA_INCLUDE_FORMS        | \
+	EV_PAGE_DATA_INCLUDE_ANNOTS)
+
+
+static void job_page_data_finished_cb (EvJob       *job,
+				       EvPageCache *cache);
+static void job_page_data_cancelled_cb (EvJob       *job,
+					EvPageCacheData *data);
+
+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_unref (data->link_mapping);
+		data->link_mapping = NULL;
+	}
+
+	if (data->image_mapping) {
+		ev_mapping_list_unref (data->image_mapping);
+		data->image_mapping = NULL;
+	}
+
+	if (data->form_field_mapping) {
+		ev_mapping_list_unref (data->form_field_mapping);
+		data->form_field_mapping = NULL;
+	}
+
+	if (data->annot_mapping) {
+		ev_mapping_list_unref (data->annot_mapping);
+		data->annot_mapping = NULL;
+	}
+
+	if (data->text_mapping) {
+		cairo_region_destroy (data->text_mapping);
+		data->text_mapping = NULL;
+	}
+
+	if (data->text_layout) {
+		g_free (data->text_layout);
+		data->text_layout = NULL;
+		data->text_layout_length = 0;
+	}
+
+	if (data->text) {
+		g_free (data->text);
+		data->text = 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);
+				g_signal_handlers_disconnect_by_func (data->job,
+								      G_CALLBACK (job_page_data_cancelled_cb),
+								      data);
+			}
+			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
+ev_page_cache_get_flags_for_data (EvPageCache     *cache,
+				  EvPageCacheData *data)
+{
+	EvJobPageDataFlags flags = EV_PAGE_DATA_INCLUDE_NONE;
+
+	if (data->flags == cache->flags && !data->dirty)
+		return cache->flags;
+
+	/* Flags changed or data is dirty */
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_LINKS) {
+		flags = (data->link_mapping) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_LINKS :
+			flags | EV_PAGE_DATA_INCLUDE_LINKS;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_IMAGES) {
+		flags = (data->image_mapping) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_IMAGES :
+			flags | EV_PAGE_DATA_INCLUDE_IMAGES;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_FORMS) {
+		flags = (data->form_field_mapping) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_FORMS :
+			flags | EV_PAGE_DATA_INCLUDE_FORMS;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_ANNOTS) {
+		flags = (data->annot_mapping) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_ANNOTS :
+			flags | EV_PAGE_DATA_INCLUDE_ANNOTS;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_TEXT_MAPPING) {
+		flags = (data->text_mapping) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_TEXT_MAPPING :
+			flags | EV_PAGE_DATA_INCLUDE_TEXT_MAPPING;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_TEXT) {
+		flags = (data->text) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_TEXT :
+			flags | EV_PAGE_DATA_INCLUDE_TEXT;
+	}
+
+	if (cache->flags & EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT) {
+		flags = (data->text_layout_length > 0) ?
+			flags & ~EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT :
+			flags | EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT;
+	}
+
+	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 = EV_PAGE_DATA_FLAGS_DEFAULT;
+	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];
+
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_LINKS)
+		data->link_mapping = job_data->link_mapping;
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_IMAGES)
+		data->image_mapping = job_data->image_mapping;
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_FORMS)
+		data->form_field_mapping = job_data->form_field_mapping;
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_ANNOTS)
+		data->annot_mapping = job_data->annot_mapping;
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_TEXT_MAPPING)
+		data->text_mapping = job_data->text_mapping;
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT) {
+		data->text_layout = job_data->text_layout;
+		data->text_layout_length = job_data->text_layout_length;
+	}
+	if (job_data->flags & EV_PAGE_DATA_INCLUDE_TEXT)
+		data->text = job_data->text;
+	data->done = TRUE;
+	data->dirty = FALSE;
+
+	g_object_unref (data->job);
+	data->job = NULL;
+}
+
+static void
+job_page_data_cancelled_cb (EvJob           *job,
+			    EvPageCacheData *data)
+{
+	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;
+
+	cache->start_page = start;
+	cache->end_page = end;
+
+	for (i = start; i <= end; i++) {
+		EvPageCacheData   *data = &cache->page_list[i];
+		EvJobPageDataFlags flags;
+
+		if (data->flags == cache->flags && !data->dirty && (data->done || data->job))
+			continue;
+
+		if (data->job)
+			ev_job_cancel (data->job);
+
+		flags = ev_page_cache_get_flags_for_data (cache, data);
+
+		data->flags = cache->flags;
+		data->job = ev_job_page_data_new (cache->document, i, flags);
+		g_signal_connect (data->job, "finished",
+				  G_CALLBACK (job_page_data_finished_cb),
+				  cache);
+		g_signal_connect (data->job, "cancelled",
+				  G_CALLBACK (job_page_data_cancelled_cb),
+				  data);
+		ev_job_scheduler_push_job (data->job, EV_JOB_PRIORITY_NONE);
+	}
+}
+
+EvJobPageDataFlags
+ev_page_cache_get_flags (EvPageCache *cache)
+{
+	return cache->flags;
+}
+
+void
+ev_page_cache_set_flags (EvPageCache       *cache,
+			 EvJobPageDataFlags flags)
+{
+	if (cache->flags == flags)
+		return;
+
+	cache->flags = flags;
+
+	/* Update the current range for new flags */
+	ev_page_cache_set_page_range (cache, cache->start_page, cache->end_page);
+}
+
+void
+ev_page_cache_mark_dirty (EvPageCache *cache,
+			  gint         page)
+{
+	EvPageCacheData *data;
+
+	g_return_if_fail (EV_IS_PAGE_CACHE (cache));
+
+	data = &cache->page_list[page];
+	data->dirty = TRUE;
+
+	/* Update the current range */
+	ev_page_cache_set_page_range (cache, cache->start_page, cache->end_page);
+}
+
+EvMappingList *
+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;
+}
+
+EvMappingList *
+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;
+}
+
+EvMappingList *
+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;
+}
+
+EvMappingList *
+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;
+}
+
+cairo_region_t *
+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_MAPPING))
+		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;
+}
+
+const gchar *
+ev_page_cache_get_text (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;
+
+	if (data->job)
+		return EV_JOB_PAGE_DATA (data->job)->text;
+
+	return data->text;
+}
+
+gboolean
+ev_page_cache_get_text_layout (EvPageCache  *cache,
+			       gint          page,
+			       EvRectangle **areas,
+			       guint        *n_areas)
+{
+	EvPageCacheData *data;
+
+	g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), FALSE);
+	g_return_val_if_fail (page >= 0 && page < cache->n_pages, FALSE);
+
+	if (!(cache->flags & EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT))
+		return FALSE;
+
+	data = &cache->page_list[page];
+	if (data->done)	{
+		*areas = data->text_layout;
+		*n_areas = data->text_layout_length;
+
+		return TRUE;
+	}
+
+	if (data->job) {
+		*areas = EV_JOB_PAGE_DATA (data->job)->text_layout;
+		*n_areas = EV_JOB_PAGE_DATA (data->job)->text_layout_length;
+
+		return TRUE;
+	}
+
+	return FALSE;
+}