Move EvView specific code to a libeviview library so that it can be

2009-01-18  Carlos Garcia Campos  <carlosgc@gnome.org>

	* configure.ac:
	* Makefile.am:
	* libdocument/Makefile.am:
	* libview/Makefile.am:
	* libview/ev-job-scheduler.[ch]:
	* libview/ev-jobs.[ch]:
	* libview/ev-page-cache.[ch]:
	* libview/ev-pixbuf-cache.[ch]:
	* libview/ev-timeline.[ch]:
	* libview/ev-transition-animation.[ch]:
	* libview/ev-view-accessible.[ch]:
	* libview/ev-view-marshal.list:
	* libview/ev-view.[ch]:
	* shell/Makefile.am:

	Move EvView specific code to a libeviview library so that it can
	be embbeded in other applications. Based on patches by Tomeu
	Vizoso. Fixes bug #567751.

svn path=/trunk/; revision=3348

1 files changed, 1253 insertions, 0 deletions

diff --git a/libview/ev-pixbuf-cache.c b/libview/ev-pixbuf-cache.c
new file mode 100644
index 0000000..bcc5c02
--- /dev/null
+++ b/libview/ev-pixbuf-cache.c
@@ -0,0 +1,1253 @@
+#include <config.h>
+#include "ev-pixbuf-cache.h"
+#include "ev-job-scheduler.h"
+#include "ev-page-cache.h"
+#include "ev-document-images.h"
+#include "ev-document-forms.h"
+#include "ev-document-links.h"
+#include "ev-image.h"
+#include "ev-form-field.h"
+
+typedef struct _CacheJobInfo
+{
+	EvJob *job;
+	EvRenderContext *rc;
+	gboolean page_ready;
+
+	/* Region of the page that needs to be drawn */
+	GdkRegion *region; 
+
+	/* Data we get from rendering */
+	cairo_surface_t *surface;
+	GList *link_mapping;
+	GList *image_mapping;
+	GList *form_field_mapping;
+	GdkRegion *text_mapping;
+	
+	/* Selection data. 
+	 * Selection_points are the coordinates encapsulated in selection.
+	 * target_points is the target selection size. */
+	EvRectangle      selection_points;
+	EvRectangle      target_points;
+	EvSelectionStyle selection_style;
+	gboolean         points_set;
+	
+	cairo_surface_t *selection;
+	GdkRegion *selection_region;
+} CacheJobInfo;
+
+struct _EvPixbufCache
+{
+	GObject parent;
+
+	/* We keep a link to our containing view just for style information. */
+	GtkWidget *view;
+	EvDocument *document;
+	int start_page;
+	int end_page;
+
+	/* preload_cache_size is the number of pages prior to the current
+	 * visible area that we cache.  It's normally 1, but could be 2 in the
+	 * case of twin pages.
+	 */
+	int preload_cache_size;
+	CacheJobInfo *prev_job;
+	CacheJobInfo *job_list;
+	CacheJobInfo *next_job;
+};
+
+struct _EvPixbufCacheClass
+{
+	GObjectClass parent_class;
+
+	void (* job_finished) (EvPixbufCache *pixbuf_cache);
+};
+
+
+enum
+{
+	JOB_FINISHED,
+	N_SIGNALS,
+};
+
+static guint signals[N_SIGNALS] = {0, };
+
+static void          ev_pixbuf_cache_init       (EvPixbufCache      *pixbuf_cache);
+static void          ev_pixbuf_cache_class_init (EvPixbufCacheClass *pixbuf_cache);
+static void          ev_pixbuf_cache_finalize   (GObject            *object);
+static void          ev_pixbuf_cache_dispose    (GObject            *object);
+static void          job_page_ready_cb          (EvJob              *job,
+						 EvPixbufCache      *pixbuf_cache);
+static void          job_finished_cb            (EvJob              *job,
+						 EvPixbufCache      *pixbuf_cache);
+static CacheJobInfo *find_job_cache             (EvPixbufCache      *pixbuf_cache,
+						 int                 page);
+static void          copy_job_to_job_info       (EvJobRender        *job_render,
+						 CacheJobInfo       *job_info,
+						 EvPixbufCache      *pixbuf_cache);
+static void          copy_job_page_and_selection_to_job_info (EvJobRender        *job_render,
+							      CacheJobInfo       *job_info,
+							      EvPixbufCache      *pixbuf_cache);
+static gboolean      new_selection_surface_needed(EvPixbufCache      *pixbuf_cache,
+						  CacheJobInfo       *job_info,
+						  gint                page,
+						  gfloat              scale);
+
+
+/* These are used for iterating through the prev and next arrays */
+#define FIRST_VISIBLE_PREV(pixbuf_cache) \
+	(MAX (0, pixbuf_cache->preload_cache_size - pixbuf_cache->start_page))
+#define VISIBLE_NEXT_LEN(pixbuf_cache, page_cache) \
+	(MIN(pixbuf_cache->preload_cache_size, ev_page_cache_get_n_pages (page_cache) - (1 + pixbuf_cache->end_page)))
+#define PAGE_CACHE_LEN(pixbuf_cache) \
+	((pixbuf_cache->end_page - pixbuf_cache->start_page) + 1)
+
+G_DEFINE_TYPE (EvPixbufCache, ev_pixbuf_cache, G_TYPE_OBJECT)
+
+static void
+ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache)
+{
+	pixbuf_cache->start_page = 0;
+	pixbuf_cache->end_page = 0;
+	pixbuf_cache->job_list = g_new0 (CacheJobInfo, PAGE_CACHE_LEN (pixbuf_cache));
+
+	pixbuf_cache->preload_cache_size = 2;
+	pixbuf_cache->prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
+	pixbuf_cache->next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
+}
+
+static void
+ev_pixbuf_cache_class_init (EvPixbufCacheClass *class)
+{
+	GObjectClass *object_class;
+
+	object_class = G_OBJECT_CLASS (class);
+
+	object_class->finalize = ev_pixbuf_cache_finalize;
+	object_class->dispose = ev_pixbuf_cache_dispose;
+
+	signals[JOB_FINISHED] =
+		g_signal_new ("job-finished",
+			      G_OBJECT_CLASS_TYPE (object_class),
+			      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			      G_STRUCT_OFFSET (EvPixbufCacheClass, job_finished),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__POINTER,
+			      G_TYPE_NONE, 1,
+			      G_TYPE_POINTER);
+}
+
+static void
+ev_pixbuf_cache_finalize (GObject *object)
+{
+	EvPixbufCache *pixbuf_cache;
+
+	pixbuf_cache = EV_PIXBUF_CACHE (object);
+
+	g_free (pixbuf_cache->prev_job);
+	g_free (pixbuf_cache->job_list);
+	g_free (pixbuf_cache->next_job);
+
+	G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->finalize (object);
+}
+
+static void
+dispose_cache_job_info (CacheJobInfo *job_info,
+			gpointer      data)
+{
+	if (job_info == NULL)
+		return;
+	if (job_info->job) {
+		g_signal_handlers_disconnect_by_func (job_info->job,
+						      G_CALLBACK (job_page_ready_cb),
+						      data);
+		g_signal_handlers_disconnect_by_func (job_info->job,
+						      G_CALLBACK (job_finished_cb),
+						      data);
+		ev_job_cancel (job_info->job);
+		g_object_unref (job_info->job);
+		job_info->job = NULL;
+	}
+	if (job_info->surface) {
+		cairo_surface_destroy (job_info->surface);
+		job_info->surface = NULL;
+	}
+	if (job_info->region) {
+		gdk_region_destroy (job_info->region);
+		job_info->region = NULL;
+	}
+	if (job_info->link_mapping) {
+		ev_link_mapping_free (job_info->link_mapping);
+		job_info->link_mapping = NULL;
+	}
+	if (job_info->image_mapping) {
+		ev_image_mapping_free (job_info->image_mapping);
+		job_info->image_mapping = NULL;
+	}
+	if (job_info->form_field_mapping) {
+		ev_form_field_mapping_free (job_info->form_field_mapping);
+		job_info->form_field_mapping = NULL;
+	}
+	if (job_info->text_mapping) {
+		gdk_region_destroy (job_info->text_mapping);
+		job_info->text_mapping = NULL;
+	}
+	if (job_info->selection) {
+		cairo_surface_destroy (job_info->selection);
+		job_info->selection = NULL;
+	}
+	if (job_info->selection_region) {
+		gdk_region_destroy (job_info->selection_region);
+		job_info->selection_region = NULL;
+	}
+	if (job_info->rc) {
+		g_object_unref (G_OBJECT (job_info->rc));
+		job_info->rc = NULL;
+	}
+
+	job_info->points_set = FALSE;
+}
+
+static void
+ev_pixbuf_cache_dispose (GObject *object)
+{
+	EvPixbufCache *pixbuf_cache;
+	int i;
+
+	pixbuf_cache = EV_PIXBUF_CACHE (object);
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+		dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+	}
+
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
+	}
+
+	G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->dispose (object);
+}
+
+
+EvPixbufCache *
+ev_pixbuf_cache_new (GtkWidget  *view,
+		     EvDocument *document)
+{
+	EvPixbufCache *pixbuf_cache;
+
+	pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
+	/* This is a backlink, so we don't ref this */ 
+	pixbuf_cache->view = view;
+	pixbuf_cache->document = document;
+
+	return pixbuf_cache;
+}
+
+static void
+job_page_ready_cb (EvJob         *job,
+		   EvPixbufCache *pixbuf_cache)
+{
+	CacheJobInfo *job_info;
+	EvJobRender *job_render = EV_JOB_RENDER (job);
+
+	/* If the job is outside of our interest, we silently discard it */
+	if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
+	    (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
+		g_object_unref (job);
+		return;
+	}
+
+	job_info = find_job_cache (pixbuf_cache, job_render->page);
+
+	copy_job_page_and_selection_to_job_info (job_render, job_info, pixbuf_cache);
+	g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
+}
+
+static void
+job_finished_cb (EvJob         *job,
+		 EvPixbufCache *pixbuf_cache)
+{
+	CacheJobInfo *job_info;
+	EvJobRender *job_render = EV_JOB_RENDER (job);
+
+	/* If the job is outside of our interest, we silently discard it */
+	if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
+	    (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
+		g_object_unref (job);
+		return;
+	}
+
+	job_info = find_job_cache (pixbuf_cache, job_render->page);
+	copy_job_to_job_info (job_render, job_info, pixbuf_cache);
+}
+
+/* This checks a job to see if the job would generate the right sized pixbuf
+ * given a scale.  If it won't, it removes the job and clears it to NULL.
+ */
+static void
+check_job_size_and_unref (EvPixbufCache *pixbuf_cache,
+			  CacheJobInfo *job_info,
+			  EvPageCache  *page_cache,
+			  gfloat        scale)
+{
+	gint width;
+	gint height;
+
+	g_assert (job_info);
+
+	if (job_info->job == NULL)
+		return;
+
+	ev_page_cache_get_size (page_cache,
+				EV_JOB_RENDER (job_info->job)->page,
+				EV_JOB_RENDER (job_info->job)->rotation,
+				scale,
+				&width, &height);
+				
+	if (width == EV_JOB_RENDER (job_info->job)->target_width &&
+	    height == EV_JOB_RENDER (job_info->job)->target_height)
+		return;
+
+	g_signal_handlers_disconnect_by_func (job_info->job,
+					      G_CALLBACK (job_page_ready_cb),
+					      pixbuf_cache);
+	g_signal_handlers_disconnect_by_func (job_info->job,
+					      G_CALLBACK (job_finished_cb),
+					      pixbuf_cache);
+	ev_job_cancel (job_info->job);
+	g_object_unref (job_info->job);
+	job_info->job = NULL;
+}
+
+/* Do all function that copies a job from an older cache to it's position in the
+ * new cache.  It clears the old job if it doesn't have a place.
+ */
+static void
+move_one_job (CacheJobInfo  *job_info,
+	      EvPixbufCache *pixbuf_cache,
+	      int            page,
+	      CacheJobInfo  *new_job_list,
+	      CacheJobInfo  *new_prev_job,
+	      CacheJobInfo  *new_next_job,
+	      int            start_page,
+	      int            end_page,
+	      gint           priority)
+{
+	CacheJobInfo *target_page = NULL;
+	int page_offset;
+	gint new_priority;
+
+	if (page < (start_page - pixbuf_cache->preload_cache_size) ||
+	    page > (end_page + pixbuf_cache->preload_cache_size)) {
+		dispose_cache_job_info (job_info, pixbuf_cache);
+		return;
+	}
+
+	/* find the target page to copy it over to. */
+	if (page < start_page) {
+		page_offset = (page - (start_page - pixbuf_cache->preload_cache_size));
+
+		g_assert (page_offset >= 0 &&
+			  page_offset < pixbuf_cache->preload_cache_size);
+		target_page = new_prev_job + page_offset;
+		new_priority = EV_JOB_PRIORITY_LOW;
+	} else if (page > end_page) {
+		page_offset = (page - (end_page + 1));
+
+		g_assert (page_offset >= 0 &&
+			  page_offset < pixbuf_cache->preload_cache_size);
+		target_page = new_next_job + page_offset;
+		new_priority = EV_JOB_PRIORITY_LOW;
+	} else {
+		page_offset = page - start_page;
+		g_assert (page_offset >= 0 &&
+			  page_offset <= ((end_page - start_page) + 1));
+		new_priority = EV_JOB_PRIORITY_URGENT;
+		target_page = new_job_list + page_offset;
+	}
+
+	*target_page = *job_info;
+	job_info->job = NULL;
+	job_info->region = NULL;
+	job_info->surface = NULL;
+	job_info->link_mapping = NULL;
+	job_info->image_mapping = NULL;
+	job_info->form_field_mapping = NULL;
+
+	if (new_priority != priority && target_page->job) {
+		ev_job_scheduler_update_job (target_page->job, new_priority);
+	}
+}
+
+static void
+ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
+			      gint           start_page,
+			      gint           end_page)
+{
+	CacheJobInfo *new_job_list;
+	CacheJobInfo *new_prev_job;
+	CacheJobInfo *new_next_job;
+	EvPageCache *page_cache;
+	int i, page;
+
+	if (pixbuf_cache->start_page == start_page &&
+	    pixbuf_cache->end_page == end_page)
+		return;
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	new_job_list = g_new0 (CacheJobInfo, (end_page - start_page) + 1);
+	new_prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
+	new_next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
+
+	/* We go through each job in the old cache and either clear it or move
+	 * it to a new location. */
+
+	/* Start with the prev cache. */
+	page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page < 0) {
+			dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+		} else {
+			move_one_job (pixbuf_cache->prev_job + i,
+				      pixbuf_cache, page,
+				      new_job_list, new_prev_job, new_next_job,
+				      start_page, end_page, EV_JOB_PRIORITY_LOW);
+		}
+		page ++;
+	}
+
+	page = pixbuf_cache->start_page;
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		move_one_job (pixbuf_cache->job_list + i,
+			      pixbuf_cache, page,
+			      new_job_list, new_prev_job, new_next_job,
+			      start_page, end_page, EV_JOB_PRIORITY_URGENT);
+		page ++;
+	}
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page >= ev_page_cache_get_n_pages (page_cache)) {
+			dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+		} else {
+			move_one_job (pixbuf_cache->next_job + i,
+				      pixbuf_cache, page,
+				      new_job_list, new_prev_job, new_next_job,
+				      start_page, end_page, EV_JOB_PRIORITY_LOW);
+		}
+		page ++;
+	}
+
+	g_free (pixbuf_cache->job_list);
+	g_free (pixbuf_cache->prev_job);
+	g_free (pixbuf_cache->next_job);
+
+	pixbuf_cache->job_list = new_job_list;
+	pixbuf_cache->prev_job = new_prev_job;
+	pixbuf_cache->next_job = new_next_job;
+
+	pixbuf_cache->start_page = start_page;
+	pixbuf_cache->end_page = end_page;
+}
+
+static void
+copy_job_page_and_selection_to_job_info (EvJobRender   *job_render,
+					 CacheJobInfo  *job_info,
+					 EvPixbufCache *pixbuf_cache)
+{
+	if (job_info->rc == NULL) {
+		job_info->rc = ev_render_context_new (job_render->ev_page,
+						      job_render->rotation,
+						      job_render->scale);
+	} else {
+		ev_render_context_set_page (job_info->rc, job_render->ev_page);
+		ev_render_context_set_rotation (job_info->rc, job_render->rotation);
+		ev_render_context_set_scale (job_info->rc, job_render->scale);
+	}
+	
+	if (job_info->surface) {
+		cairo_surface_destroy (job_info->surface);
+	}
+	job_info->surface = cairo_surface_reference (job_render->surface);
+
+	job_info->points_set = FALSE;
+	if (job_render->flags & EV_RENDER_INCLUDE_SELECTION) {
+		if (job_info->selection) {
+			cairo_surface_destroy (job_info->selection);
+			job_info->selection = NULL;
+		}
+		if (job_info->selection_region) {
+			gdk_region_destroy (job_info->selection_region);
+			job_info->selection_region = NULL;
+		}
+		
+		job_info->selection_points = job_render->selection_points;
+		job_info->selection_region = gdk_region_copy (job_render->selection_region);
+		job_info->selection = cairo_surface_reference (job_render->selection);
+		g_assert (job_info->selection_points.x1 >= 0);
+		job_info->points_set = TRUE;
+	}
+
+	if (job_info->job) {
+		g_signal_handlers_disconnect_by_func (job_info->job,
+						      G_CALLBACK (job_page_ready_cb),
+						      pixbuf_cache);
+	}
+
+	job_info->page_ready = TRUE;
+}
+
+static void
+copy_job_to_job_info (EvJobRender   *job_render,
+		      CacheJobInfo  *job_info,
+		      EvPixbufCache *pixbuf_cache)
+{
+	if (!job_info->page_ready) {
+		g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
+		copy_job_page_and_selection_to_job_info (job_render,
+							 job_info,
+							 pixbuf_cache);
+	}
+	
+	if (job_render->flags & EV_RENDER_INCLUDE_LINKS) {
+		if (job_info->link_mapping)
+			ev_link_mapping_free (job_info->link_mapping);
+		job_info->link_mapping = job_render->link_mapping;
+	}
+
+	if (job_render->flags & EV_RENDER_INCLUDE_IMAGES) {
+		if (job_info->image_mapping)
+			ev_image_mapping_free (job_info->image_mapping);
+		job_info->image_mapping = job_render->image_mapping;
+	}
+
+	if (job_render->flags & EV_RENDER_INCLUDE_FORMS) {
+		if (job_info->form_field_mapping)
+			ev_form_field_mapping_free (job_info->form_field_mapping);
+		job_info->form_field_mapping = job_render->form_field_mapping;
+	}
+
+	if (job_render->flags & EV_RENDER_INCLUDE_TEXT) {
+		if (job_info->text_mapping)
+			gdk_region_destroy (job_info->text_mapping);
+		job_info->text_mapping = job_render->text_mapping;
+	}
+
+	if (job_info->job) {
+		g_signal_handlers_disconnect_by_func (job_info->job,
+						      G_CALLBACK (job_finished_cb),
+						      pixbuf_cache);
+		ev_job_cancel (job_info->job);
+		g_object_unref (job_info->job);
+		job_info->job = NULL;
+	}
+}
+
+static CacheJobInfo *
+find_job_cache (EvPixbufCache *pixbuf_cache,
+		int            page)
+{
+	int page_offset;
+
+	if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
+	    page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
+		return NULL;
+
+	if (page < pixbuf_cache->start_page) {
+		page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
+
+		g_assert (page_offset >= 0 &&
+			  page_offset < pixbuf_cache->preload_cache_size);
+		return pixbuf_cache->prev_job + page_offset;
+	}
+
+	if (page > pixbuf_cache->end_page) {
+		page_offset = (page - (pixbuf_cache->end_page + 1));
+
+		g_assert (page_offset >= 0 &&
+			  page_offset < pixbuf_cache->preload_cache_size);
+		return pixbuf_cache->next_job + page_offset;
+	}
+
+	page_offset = page - pixbuf_cache->start_page;
+	g_assert (page_offset >= 0 &&
+		  page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
+	return pixbuf_cache->job_list + page_offset;
+}
+
+static void
+ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
+				 gfloat         scale)
+{
+	EvPageCache *page_cache;
+	int i;
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, page_cache, scale);
+	}
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, page_cache, scale);
+		check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, page_cache, scale);
+	}
+}
+
+static void
+get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
+{
+    if (GTK_WIDGET_HAS_FOCUS (widget)) {
+	*text = &widget->style->text [GTK_STATE_SELECTED];
+	*base = &widget->style->base [GTK_STATE_SELECTED];
+    } else {
+	*text = &widget->style->text [GTK_STATE_ACTIVE];
+	*base = &widget->style->base [GTK_STATE_ACTIVE];
+    }
+}
+
+static void
+add_job (EvPixbufCache *pixbuf_cache,
+	 CacheJobInfo  *job_info,
+	 EvPageCache   *page_cache,
+	 GdkRegion     *region,
+	 gint           width,
+	 gint           height,
+	 gint           page,
+	 gint           rotation,
+	 gfloat         scale,
+	 EvJobPriority  priority)
+{
+	EvRenderFlags flags = 0;
+
+	job_info->page_ready = FALSE;
+	
+	if (job_info->region)
+		gdk_region_destroy (job_info->region);
+	job_info->region = region ? gdk_region_copy (region) : NULL;
+
+	/* Figure out what else we need for this job */
+	if (job_info->link_mapping == NULL)
+		flags |= EV_RENDER_INCLUDE_LINKS;
+	if (job_info->image_mapping == NULL)
+		flags |= EV_RENDER_INCLUDE_IMAGES;
+	if (job_info->form_field_mapping == NULL)
+		flags |= EV_RENDER_INCLUDE_FORMS;
+	if (job_info->text_mapping == NULL)
+		flags |= EV_RENDER_INCLUDE_TEXT;
+
+	job_info->job = ev_job_render_new (pixbuf_cache->document,
+					   page, rotation, scale,
+					   width, height,
+					   flags);
+	
+	if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
+		GdkColor *text, *base;
+
+		gtk_widget_ensure_style (pixbuf_cache->view);
+		get_selection_colors (pixbuf_cache->view, &text, &base);
+		ev_job_render_set_selection_info (EV_JOB_RENDER (job_info->job), 
+						  &(job_info->target_points),
+						  job_info->selection_style,
+						  text, base);
+	}
+
+	g_signal_connect (G_OBJECT (job_info->job), "page-ready",
+			  G_CALLBACK (job_page_ready_cb),
+			  pixbuf_cache);
+	g_signal_connect (G_OBJECT (job_info->job), "finished",
+			  G_CALLBACK (job_finished_cb),
+			  pixbuf_cache);
+	ev_job_scheduler_push_job (job_info->job, priority);
+}
+
+static void
+add_job_if_needed (EvPixbufCache *pixbuf_cache,
+		   CacheJobInfo  *job_info,
+		   EvPageCache   *page_cache,
+		   gint           page,
+		   gint           rotation,
+		   gfloat         scale,
+		   EvJobPriority  priority)
+{
+	gint width, height;
+
+	if (job_info->job)
+		return;
+
+	ev_page_cache_get_size (page_cache, page, rotation,
+				scale, &width, &height);
+
+	if (job_info->surface &&
+	    cairo_image_surface_get_width (job_info->surface) == width &&
+	    cairo_image_surface_get_height (job_info->surface) == height)
+		return;
+
+	add_job (pixbuf_cache, job_info, page_cache, NULL,
+		 width, height, page, rotation, scale,
+		 priority);
+}
+
+static void
+ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
+				    gint           rotation,
+				    gfloat         scale)
+{
+	EvPageCache *page_cache;
+	CacheJobInfo *job_info;
+	int page;
+	int i;
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		job_info = (pixbuf_cache->job_list + i);
+		page = pixbuf_cache->start_page + i;
+
+		add_job_if_needed (pixbuf_cache, job_info,
+				   page_cache, page, rotation, scale,
+				   EV_JOB_PRIORITY_URGENT);
+	}
+
+	for (i = FIRST_VISIBLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
+		job_info = (pixbuf_cache->prev_job + i);
+		page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
+
+		add_job_if_needed (pixbuf_cache, job_info,
+				   page_cache, page, rotation, scale,
+				   EV_JOB_PRIORITY_LOW);
+	}
+
+	for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache, page_cache); i++) {
+		job_info = (pixbuf_cache->next_job + i);
+		page = pixbuf_cache->end_page + 1 + i;
+
+		add_job_if_needed (pixbuf_cache, job_info,
+				   page_cache, page, rotation, scale,
+				   EV_JOB_PRIORITY_LOW);
+	}
+
+}
+
+void
+ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
+				gint            start_page,
+				gint            end_page,
+				gint            rotation,
+				gfloat          scale,
+				GList          *selection_list)
+{
+	EvPageCache *page_cache;
+
+	g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	g_return_if_fail (start_page >= 0 && start_page < ev_page_cache_get_n_pages (page_cache));
+	g_return_if_fail (end_page >= 0 && end_page < ev_page_cache_get_n_pages (page_cache));
+	g_return_if_fail (end_page >= start_page);
+
+	/* First, resize the page_range as needed.  We cull old pages
+	 * mercilessly. */
+	ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
+
+	/* Then, we update the current jobs to see if any of them are the wrong
+	 * size, we remove them if we need to. */
+	ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
+
+	/* Next, we update the target selection for our pages */
+	ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
+
+	/* Finally, we add the new jobs for all the sizes that don't have a
+	 * pixbuf */
+	ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
+}
+
+cairo_surface_t *
+ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
+			     gint           page)
+{
+	CacheJobInfo *job_info;
+
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	if (job_info->page_ready)
+		return job_info->surface;
+	
+	/* We don't need to wait for the idle to handle the callback */
+	if (job_info->job &&
+	    EV_JOB_RENDER (job_info->job)->page_ready) {
+		copy_job_page_and_selection_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
+		g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
+	}
+
+	return job_info->surface;
+}
+
+GList *
+ev_pixbuf_cache_get_link_mapping (EvPixbufCache *pixbuf_cache,
+				  gint           page)
+{
+	CacheJobInfo *job_info;
+
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	/* We don't need to wait for the idle to handle the callback */
+	if (job_info->job &&
+	    EV_JOB (job_info->job)->finished) {
+		copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
+	}
+
+	return job_info->link_mapping;
+}
+
+GList *
+ev_pixbuf_cache_get_image_mapping (EvPixbufCache *pixbuf_cache,
+				   gint           page)
+{
+	CacheJobInfo *job_info;
+
+	if (!EV_IS_DOCUMENT_IMAGES (pixbuf_cache->document))
+		return NULL;
+	
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	/* We don't need to wait for the idle to handle the callback */
+	if (job_info->job &&
+	    EV_JOB (job_info->job)->finished) {
+		copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
+	}
+
+	return job_info->image_mapping;
+}
+
+GList *
+ev_pixbuf_cache_get_form_field_mapping (EvPixbufCache *pixbuf_cache,
+				  	gint 	       page)
+{
+	CacheJobInfo *job_info;
+
+	if (!EV_IS_DOCUMENT_FORMS (pixbuf_cache->document))
+		return NULL;
+	
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	/* We don't need to wait for the idle to handle the callback */
+	if (job_info->job &&
+	   EV_JOB (job_info->job)->finished) {
+		copy_job_to_job_info (EV_JOB_RENDER(job_info->job), job_info, pixbuf_cache);
+	}
+	
+	return job_info->form_field_mapping;
+}
+
+static gboolean
+new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
+			      CacheJobInfo  *job_info,
+			      gint           page,
+			      gfloat         scale)
+{
+	EvPageCache *page_cache;
+
+	if (job_info->selection && job_info->rc) {
+		gint width, height;
+		gint selection_width, selection_height;
+		
+		page_cache = ev_page_cache_get (pixbuf_cache->document);
+		ev_page_cache_get_size (page_cache, page,
+					job_info->rc->rotation,
+					scale, &width, &height);
+
+		selection_width = cairo_image_surface_get_width (job_info->selection);
+		selection_height = cairo_image_surface_get_height (job_info->selection);
+		
+		if (width != selection_width || height != selection_height)
+			return TRUE;
+	} else {
+		if (job_info->points_set)
+			return TRUE;
+	}
+	
+	return FALSE;
+}
+
+static void
+clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
+			   CacheJobInfo  *job_info,
+			   gint           page,
+			   gfloat         scale)
+{
+	if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
+		if (job_info->selection)
+			cairo_surface_destroy (job_info->selection);
+		job_info->selection = NULL;
+		job_info->selection_points.x1 = -1;
+	}
+}
+
+GdkRegion *
+ev_pixbuf_cache_get_text_mapping (EvPixbufCache *pixbuf_cache,
+				  gint           page)
+{
+	CacheJobInfo *job_info;
+
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	/* We don't need to wait for the idle to handle the callback */
+	if (job_info->job &&
+	    EV_JOB (job_info->job)->finished) {
+		copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
+	}
+	
+	return job_info->text_mapping;
+}
+
+/* Clears the cache of jobs and pixbufs.
+ */
+void
+ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
+{
+	int i;
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
+		dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
+	}
+
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
+	}
+}
+
+
+void
+ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
+{
+	gint i;
+
+	/* FIXME: doesn't update running jobs. */
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		CacheJobInfo *job_info;
+
+		job_info = pixbuf_cache->prev_job + i;
+		if (job_info->selection) {
+			cairo_surface_destroy (job_info->selection);
+			job_info->selection = NULL;
+		}
+
+		job_info = pixbuf_cache->next_job + i;
+		if (job_info->selection) {
+			cairo_surface_destroy (job_info->selection);
+			job_info->selection = NULL;
+		}
+	}
+
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		CacheJobInfo *job_info;
+
+		job_info = pixbuf_cache->job_list + i;
+		if (job_info->selection) {
+			cairo_surface_destroy (job_info->selection);
+			job_info->selection = NULL;
+		}
+	}
+}
+
+cairo_surface_t *
+ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
+				       gint            page,
+				       gfloat          scale,
+				       GdkRegion     **region)
+{
+	CacheJobInfo *job_info;
+
+	/* the document does not implement the selection interface */
+	if (!EV_IS_SELECTION (pixbuf_cache->document))
+		return NULL;
+
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return NULL;
+
+	/* No selection on this page */
+	if (!job_info->points_set)
+		return NULL;
+
+	/* Create new render context if needed (selection + fast scrolling) */
+	if (job_info->rc == NULL) {
+		EvPage  *ev_page;
+		ev_page = ev_document_get_page (pixbuf_cache->document, page);
+		job_info->rc = ev_render_context_new (ev_page, 0, scale);
+		g_object_unref (ev_page);
+	}
+
+	/* Update the rc */
+	ev_render_context_set_scale (job_info->rc, scale);
+
+	/* If we have a running job, we just return what we have under the
+	 * assumption that it'll be updated later and we can scale it as need
+	 * be */
+	if (job_info->job && (EV_JOB_RENDER (job_info->job)->flags & EV_RENDER_INCLUDE_SELECTION))
+		return job_info->selection;
+
+	/* Now, lets see if we need to resize the image.  If we do, we clear the
+	 * old one. */
+	clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
+
+	/* Finally, we see if the two scales are the same, and get a new pixbuf
+	 * if needed.  We do this synchronously for now.  At some point, we
+	 * _should_ be able to get rid of the doc_mutex, so the synchronicity
+	 * doesn't kill us.  Rendering a few glyphs should really be fast.
+	 */
+	if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
+		EvRectangle *old_points;
+		GdkColor *text, *base;
+
+		/* we need to get a new selection pixbuf */
+		ev_document_doc_mutex_lock ();
+		if (job_info->selection_points.x1 < 0) {
+			g_assert (job_info->selection == NULL);
+			old_points = NULL;
+		} else {
+			g_assert (job_info->selection != NULL);
+			old_points = &(job_info->selection_points);
+		}
+
+		if (job_info->selection_region)
+			gdk_region_destroy (job_info->selection_region);
+		job_info->selection_region =
+			ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
+							   job_info->rc,
+							   job_info->selection_style,
+							   &(job_info->target_points));
+
+		gtk_widget_ensure_style (pixbuf_cache->view);
+
+		get_selection_colors (pixbuf_cache->view, &text, &base);
+
+		ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
+					       job_info->rc, &(job_info->selection),
+					       &(job_info->target_points),
+					       old_points,
+					       job_info->selection_style,
+					       text, base);
+		job_info->selection_points = job_info->target_points;
+		ev_document_doc_mutex_unlock ();
+	}
+	if (region)
+		*region = job_info->selection_region;
+	return job_info->selection;
+}
+
+static void
+update_job_selection (CacheJobInfo    *job_info,
+		      EvViewSelection *selection)
+{
+	job_info->points_set = TRUE;		
+	job_info->target_points = selection->rect;
+	job_info->selection_style = selection->style;
+}
+
+static void
+clear_job_selection (CacheJobInfo *job_info)
+{
+	job_info->points_set = FALSE;
+	job_info->selection_points.x1 = -1;
+
+	if (job_info->selection) {
+		cairo_surface_destroy (job_info->selection);
+		job_info->selection = NULL;
+	}
+}
+
+/* This function will reset the selection on pages that no longer have them, and
+ * will update the target_selection on those that need it.  It will _not_ free
+ * the previous selection_list -- that's up to caller to do.
+ */
+void
+ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
+				    GList         *selection_list)
+{
+	EvPageCache *page_cache;
+	EvViewSelection *selection;
+	GList *list = selection_list;
+	int page;
+	int i;
+
+	g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
+
+	if (!EV_IS_SELECTION (pixbuf_cache->document))
+		return;
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	/* We check each area to see what needs updating, and what needs freeing; */
+	page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page < 0) {
+			page ++;
+			continue;
+		}
+
+		selection = NULL;
+		while (list) {
+			if (((EvViewSelection *)list->data)->page == page) {
+				selection = list->data;
+				break;
+			} else if (((EvViewSelection *)list->data)->page > page) 
+				break;
+			list = list->next;
+		}
+
+		if (selection)
+			update_job_selection (pixbuf_cache->prev_job + i, selection);
+		else
+			clear_job_selection (pixbuf_cache->prev_job + i);
+		page ++;
+	}
+
+	page = pixbuf_cache->start_page;
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		selection = NULL;
+		while (list) {
+			if (((EvViewSelection *)list->data)->page == page) {
+				selection = list->data;
+				break;
+			} else if (((EvViewSelection *)list->data)->page > page) 
+				break;
+			list = list->next;
+		}
+
+		if (selection)
+			update_job_selection (pixbuf_cache->job_list + i, selection);
+		else
+			clear_job_selection (pixbuf_cache->job_list + i);
+		page ++;
+	}
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page >= ev_page_cache_get_n_pages (page_cache))
+			break;
+
+		selection = NULL;
+		while (list) {
+			if (((EvViewSelection *)list->data)->page == page) {
+				selection = list->data;
+				break;
+			} else if (((EvViewSelection *)list->data)->page > page) 
+				break;
+			list = list->next;
+		}
+
+		if (selection)
+			update_job_selection (pixbuf_cache->next_job + i, selection);
+		else
+			clear_job_selection (pixbuf_cache->next_job + i);
+		page ++;
+	}
+}
+
+
+/* Returns what the pixbuf cache thinks is */
+
+GList *
+ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
+{
+	EvPageCache *page_cache;
+	EvViewSelection *selection;
+	GList *retval = NULL;
+	int page;
+	int i;
+
+	g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
+
+	page_cache = ev_page_cache_get (pixbuf_cache->document);
+
+	/* We check each area to see what needs updating, and what needs freeing; */
+	page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page < 0) {
+			page ++;
+			continue;
+		}
+
+		if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
+			selection = g_new0 (EvViewSelection, 1);
+			selection->page = page;
+			selection->rect = pixbuf_cache->prev_job[i].selection_points;
+			if (pixbuf_cache->prev_job[i].selection_region)
+				selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
+			retval = g_list_append (retval, selection);
+		}
+		
+		page ++;
+	}
+
+	page = pixbuf_cache->start_page;
+	for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
+		if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
+			selection = g_new0 (EvViewSelection, 1);
+			selection->page = page;
+			selection->rect = pixbuf_cache->job_list[i].selection_points;
+			if (pixbuf_cache->job_list[i].selection_region)
+				selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
+			retval = g_list_append (retval, selection);
+		}
+		
+		page ++;
+	}
+
+	for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
+		if (page >= ev_page_cache_get_n_pages (page_cache))
+			break;
+
+		if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
+			selection = g_new0 (EvViewSelection, 1);
+			selection->page = page;
+			selection->rect = pixbuf_cache->next_job[i].selection_points;
+			if (pixbuf_cache->next_job[i].selection_region)
+				selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
+			retval = g_list_append (retval, selection);
+		}
+		
+		page ++;
+	}
+
+	return retval;
+}
+
+void           
+ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
+			     GdkRegion     *region,
+			     gint           page,
+			     gint           rotation,
+			     gdouble        scale)
+{
+	CacheJobInfo *job_info;
+        EvPageCache *page_cache;
+        gint width, height;
+
+	job_info = find_job_cache (pixbuf_cache, page);
+	if (job_info == NULL)
+		return;
+	
+        page_cache = ev_page_cache_get (pixbuf_cache->document);
+	ev_page_cache_get_size (page_cache, page, rotation, scale,
+				&width, &height);
+
+        add_job (pixbuf_cache, job_info, page_cache, region,
+		 width, height, page, rotation, scale,
+		 EV_JOB_PRIORITY_URGENT);
+}
+
+