[glib-demo] Add Optional Content demo

4 files changed, 547 insertions, 1 deletions

diff --git a/glib/demo/Makefile.am b/glib/demo/Makefile.am
index a79dbec3..781c9743 100644
--- a/glib/demo/Makefile.am
+++ b/glib/demo/Makefile.am
@@ -24,6 +24,8 @@ poppler_glib_demo_SOURCES = 			\
 	images.c				\
 	info.h					\
 	info.cc					\
+	layers.h				\
+	layers.c				\
 	links.h					\
 	links.c					\
 	outline.h				\
diff --git a/glib/demo/layers.c b/glib/demo/layers.c
new file mode 100644
index 00000000..ac933767
--- /dev/null
+++ b/glib/demo/layers.c
@@ -0,0 +1,511 @@
+/*
+ * Copyright (C) 2008 Carlos Garcia Campos  <carlosgc@gnome.org>
+ *
+ * This program 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, or (at your option)
+ * any later version.
+ *
+ * This program 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 <gtk/gtk.h>
+
+#include "layers.h"
+
+enum {
+	LAYERS_TITLE_COLUMN,
+	LAYERS_VISIBILITY_COLUMN,
+	LAYERS_ENABLE_COLUMN,
+	LAYERS_SHOWTOGGLE_COLUMN,
+	LAYERS_RB_GROUP_COLUMN,
+	LAYERS_LAYER_COLUMN,
+	N_COLUMNS
+};
+
+typedef struct {
+	PopplerDocument *doc;
+	guint            page;
+	GtkWidget       *treeview;
+	GtkWidget       *darea;
+	
+#if defined (HAVE_CAIRO)
+	cairo_surface_t *surface;
+#else
+	GdkPixbuf       *pixbuf;
+#endif
+} PgdLayersDemo;
+
+static void
+pgd_layers_free (PgdLayersDemo *demo)
+{
+	if (!demo)
+		return;
+
+	if (demo->doc) {
+		g_object_unref (demo->doc);
+		demo->doc = NULL;
+	}
+	
+#if defined (HAVE_CAIRO)
+	if (demo->surface) {
+		cairo_surface_destroy (demo->surface);
+		demo->surface = NULL;
+	}
+#else
+	if (demo->pixbuf) {
+		g_object_unref (demo->pixbuf);
+		demo->pixbuf = NULL;
+	}
+#endif
+
+	g_free (demo);
+}
+
+static void
+build_tree (PopplerDocument   *document,
+	    GtkTreeModel      *model,
+	    GtkTreeIter       *parent,
+	    PopplerLayersIter *iter)
+{
+
+	do {
+		GtkTreeIter        tree_iter;
+		PopplerLayersIter *child;
+		PopplerLayer      *layer;
+		gboolean           visible;
+		gchar             *markup;
+		gint               rb_group = 0;
+
+		layer = poppler_layers_iter_get_layer (iter);
+		if (layer) {
+			markup = g_markup_escape_text (poppler_layer_get_title (layer), -1);
+			visible = poppler_layer_is_visible (layer);
+			rb_group = poppler_layer_get_radio_button_group_id (layer);
+		} else {
+			gchar *title;
+
+			title = poppler_layers_iter_get_title (iter);
+			markup = g_markup_escape_text (title, -1);
+			g_free (title);
+
+			visible = FALSE;
+			layer = NULL;
+		}
+
+		gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
+		gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
+				    LAYERS_TITLE_COLUMN, markup,
+				    LAYERS_VISIBILITY_COLUMN, visible,
+				    LAYERS_ENABLE_COLUMN, TRUE, /* FIXME */
+				    LAYERS_SHOWTOGGLE_COLUMN, (layer != NULL),
+				    LAYERS_RB_GROUP_COLUMN, rb_group,
+				    LAYERS_LAYER_COLUMN, layer,
+				    -1);
+		if (layer)
+			g_object_unref (layer);
+		g_free (markup);
+
+		child = poppler_layers_iter_get_child (iter);
+		if (child)
+			build_tree (document, model, &tree_iter, child);
+		poppler_layers_iter_free (child);
+	} while (poppler_layers_iter_next (iter));
+}
+
+GtkTreeModel *
+pgd_layers_create_model (PopplerDocument *document)
+{
+	GtkTreeModel     *model;
+	PopplerLayersIter *iter;
+
+	iter = poppler_layers_iter_new (document);
+	if (iter) {
+		model = GTK_TREE_MODEL (
+			gtk_tree_store_new (N_COLUMNS,
+					    G_TYPE_STRING, 
+					    G_TYPE_BOOLEAN,
+					    G_TYPE_BOOLEAN,
+					    G_TYPE_BOOLEAN,
+					    G_TYPE_INT,
+					    G_TYPE_OBJECT));
+		build_tree (document, model, NULL, iter);
+		poppler_layers_iter_free (iter);
+	} else {
+		GtkTreeIter tree_iter;
+		gchar      *markup;
+		
+		model = GTK_TREE_MODEL (gtk_list_store_new (1, G_TYPE_STRING));
+		gtk_list_store_append (GTK_LIST_STORE (model), &tree_iter);
+		markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>",
+					  "The document doesn't contain layers");
+		gtk_list_store_set (GTK_LIST_STORE (model), &tree_iter,
+				    0, markup, -1);
+		g_free (markup);
+	}
+
+	return model;
+}
+
+#if defined (HAVE_CAIRO)
+static cairo_surface_t *
+pgd_layers_render_page (PgdLayersDemo *demo)
+{
+	cairo_t *cr;
+	PopplerPage *page;
+	gdouble width, height;
+	cairo_surface_t *surface = NULL;
+
+	page = poppler_document_get_page (demo->doc, demo->page);
+	if (!page)
+		return NULL;
+
+	poppler_page_get_size (page, &width, &height);
+	gtk_widget_set_size_request (demo->darea, width, height);
+	
+	surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+					      width, height);
+	cr = cairo_create (surface);
+
+	cairo_save (cr);
+	cairo_set_source_rgb (cr, 1, 1, 1);
+	cairo_rectangle (cr, 0, 0, width, height);
+	cairo_fill (cr);
+	cairo_restore (cr);
+
+	cairo_save (cr);
+	poppler_page_render (page, cr);
+	cairo_restore (cr);
+	
+	cairo_destroy (cr);
+	g_object_unref (page);
+
+	return surface;
+}
+#else
+static GdkPixbuf *
+pgd_layers_render_page (PgdLayersDemo *demo)
+{
+	PopplerPage *page;
+	gdouble width, height;
+	GdkPixbuf *pixbuf = NULL;
+
+	page = poppler_document_get_page (demo->doc, demo->page);
+	if (!page)
+		return NULL;
+
+	poppler_page_get_size (page, &width, &height);
+	gtk_widget_set_size_request (demo->darea, width, height);
+	
+	pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+				 FALSE, 8, width, height);
+	gdk_pixbuf_fill (pixbuf, 0xffffff);
+	poppler_page_render_to_pixbuf (page, 0, 0, 
+				       width, height,
+				       1.0, 0, pixbuf);
+	g_object_unref (page);
+
+	return pixbuf;
+}
+#endif
+
+static gboolean
+pgd_layers_viewer_drawing_area_expose (GtkWidget      *area,
+				       GdkEventExpose *event,
+				       PgdLayersDemo  *demo)
+{
+#if defined (HAVE_CAIRO)
+	cairo_t *cr;
+	
+	if (!demo->surface) {
+		demo->surface = pgd_layers_render_page (demo);
+		if (!demo->surface)
+			return FALSE;
+	}
+#else
+	
+	if (!demo->pixbuf) {
+		demo->pixbuf = pgd_layers_render_page (demo);
+		if (!demo->pixbuf)
+			return FALSE;
+	}
+#endif
+
+	gdk_window_clear (area->window);
+
+#if defined (HAVE_CAIRO)
+	cr = gdk_cairo_create (area->window);
+	cairo_set_source_surface (cr, demo->surface, 0, 0);
+	cairo_paint (cr);
+	cairo_destroy (cr);
+#else
+	gdk_draw_pixbuf (area->window,
+			 area->style->fg_gc[GTK_STATE_NORMAL],
+			 demo->pixbuf,
+			 0, 0,
+			 0, 0,
+			 gdk_pixbuf_get_width (demo->pixbuf),
+			 gdk_pixbuf_get_height (demo->pixbuf),
+			 GDK_RGB_DITHER_NORMAL,
+			 0, 0);
+#endif
+	
+	return TRUE;
+}
+
+static gboolean
+pgd_layers_viewer_redraw (PgdLayersDemo *demo)
+{
+#if defined (HAVE_CAIRO)
+	cairo_surface_destroy (demo->surface);
+	demo->surface = NULL;
+#else
+	g_object_unref (demo->pixbuf);
+	demo->pixbuf = NULL;
+#endif
+	gtk_widget_queue_draw (demo->darea);
+
+	return FALSE;
+}
+
+static void
+pgd_layers_viewer_queue_redraw (PgdLayersDemo *demo)
+{
+	g_idle_add ((GSourceFunc)pgd_layers_viewer_redraw, demo);
+}
+
+static void
+pgd_layers_page_selector_value_changed (GtkSpinButton *spinbutton,
+					PgdLayersDemo *demo)
+{
+	demo->page = (gint)gtk_spin_button_get_value (spinbutton) - 1;
+	pgd_layers_viewer_queue_redraw (demo);
+}
+
+static GtkWidget *
+pgd_layers_create_viewer (PgdLayersDemo *demo)
+{
+	GtkWidget *vbox, *hbox;
+	GtkWidget *label;
+	GtkWidget *swindow;
+	GtkWidget *page_selector;
+	guint      n_pages;
+	gchar     *str;
+
+	vbox = gtk_vbox_new (FALSE, 6);
+
+	hbox = gtk_hbox_new (FALSE, 6);
+
+	label = gtk_label_new ("Page:");
+	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
+	gtk_widget_show (label);
+
+	n_pages = poppler_document_get_n_pages (demo->doc);
+	page_selector = gtk_spin_button_new_with_range (1, n_pages, 1);
+	g_signal_connect (G_OBJECT (page_selector), "value-changed",
+			  G_CALLBACK (pgd_layers_page_selector_value_changed),
+			  (gpointer)demo);
+	gtk_box_pack_start (GTK_BOX (hbox), page_selector, FALSE, TRUE, 0);
+	gtk_widget_show (page_selector);
+
+	str = g_strdup_printf ("of %d", n_pages);
+	label = gtk_label_new (str);
+	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
+	gtk_widget_show (label);
+	g_free (str);
+
+	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 0);
+	gtk_widget_show (hbox);
+
+	demo->darea = gtk_drawing_area_new ();
+	g_signal_connect (G_OBJECT (demo->darea), "expose_event",
+			  G_CALLBACK (pgd_layers_viewer_drawing_area_expose),
+			  (gpointer)demo);
+
+	swindow = gtk_scrolled_window_new (NULL, NULL);
+	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
+					GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+	gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (swindow), demo->darea);
+	gtk_widget_show (demo->darea);
+
+	gtk_box_pack_start (GTK_BOX (vbox), swindow, TRUE, TRUE, 0);
+	gtk_widget_show (swindow);
+
+	return vbox;
+}
+
+static gboolean
+update_kids (GtkTreeModel *model,
+	     GtkTreePath  *path,
+	     GtkTreeIter  *iter,
+	     GtkTreeIter  *parent)
+{
+	if (gtk_tree_store_is_ancestor (GTK_TREE_STORE (model), parent, iter)) {
+		gboolean visible;
+
+		gtk_tree_model_get (model, parent,
+				    LAYERS_VISIBILITY_COLUMN, &visible,
+				    -1);
+		gtk_tree_store_set (GTK_TREE_STORE (model), iter,
+				    LAYERS_ENABLE_COLUMN, visible,
+				    -1);
+	}
+
+	return FALSE;
+}
+
+static gboolean
+clear_rb_group (GtkTreeModel *model,
+		GtkTreePath  *path,
+		GtkTreeIter  *iter,
+		gint         *rb_group)
+{
+	gint group;
+	
+	gtk_tree_model_get (model, iter,
+			    LAYERS_RB_GROUP_COLUMN, &group,
+			    -1);
+	
+	if (group == *rb_group) {
+		gtk_tree_store_set (GTK_TREE_STORE (model), iter,
+				    LAYERS_VISIBILITY_COLUMN, FALSE,
+				    -1);
+	}
+	
+	return FALSE;
+}
+
+static void
+pgd_layers_visibility_changed (GtkCellRendererToggle *cell,
+			       gchar                 *path_str,
+			       PgdLayersDemo         *demo)
+{
+	GtkTreeModel *model;
+	GtkTreePath *path;
+	GtkTreeIter iter;
+	gboolean visible;
+	PopplerLayer *layer;
+
+	model = gtk_tree_view_get_model (GTK_TREE_VIEW (demo->treeview));
+
+	path = gtk_tree_path_new_from_string (path_str);
+	gtk_tree_model_get_iter (model, &iter, path);
+	gtk_tree_model_get (model, &iter,
+			    LAYERS_VISIBILITY_COLUMN, &visible,
+			    LAYERS_LAYER_COLUMN, &layer,
+			    -1);
+
+	visible = !visible;
+	visible ? poppler_layer_show (layer) : poppler_layer_hide (layer);
+
+	if (visible) {
+		gint rb_group;
+		
+		rb_group = poppler_layer_get_radio_button_group_id (layer);
+		if (rb_group) {
+			gtk_tree_model_foreach (model,
+						(GtkTreeModelForeachFunc)clear_rb_group,
+						&rb_group);
+		}
+	}
+	
+	gtk_tree_store_set (GTK_TREE_STORE (model), &iter,
+			    LAYERS_VISIBILITY_COLUMN, visible,
+			    -1);
+	
+	if (poppler_layer_is_parent (layer)) {
+		gtk_tree_model_foreach (model,
+					(GtkTreeModelForeachFunc)update_kids,
+					&iter);
+	}
+
+	pgd_layers_viewer_queue_redraw (demo);
+
+	gtk_tree_path_free (path);
+	g_object_unref (layer);
+}
+
+GtkWidget *
+pgd_layers_create_widget (PopplerDocument *document)
+{
+	PgdLayersDemo    *demo;
+	GtkWidget        *swindow;
+	GtkWidget        *treeview;
+	GtkTreeModel     *model;
+	GtkCellRenderer  *renderer;
+	GtkTreeSelection *selection;
+	GtkWidget        *hpaned, *viewer;
+
+	demo = g_new0 (PgdLayersDemo, 1);
+	demo->doc = g_object_ref (document);
+	
+	hpaned = gtk_hpaned_new ();
+
+	viewer = pgd_layers_create_viewer (demo);
+	
+	swindow = gtk_scrolled_window_new (NULL, NULL);
+	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
+					GTK_POLICY_AUTOMATIC,
+					GTK_POLICY_AUTOMATIC);
+
+	model = pgd_layers_create_model (document);
+	treeview = gtk_tree_view_new_with_model (model);
+	demo->treeview = treeview;
+	g_object_unref (model);
+
+	renderer = gtk_cell_renderer_text_new ();
+	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
+						     0, "Layer",
+						     renderer,
+						     "markup", LAYERS_TITLE_COLUMN,
+						     NULL);
+	g_object_set (G_OBJECT (renderer), "ellipsize", PANGO_ELLIPSIZE_END, NULL);
+	g_object_set (G_OBJECT (gtk_tree_view_get_column (GTK_TREE_VIEW (treeview), 0)),
+		      "expand", TRUE, NULL);
+
+	if (GTK_IS_TREE_STORE (model)) {
+		renderer = gtk_cell_renderer_toggle_new ();
+		gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
+							     1, "Show/Hide",
+							     renderer,
+							     "active", LAYERS_VISIBILITY_COLUMN,
+							     "activatable", LAYERS_ENABLE_COLUMN,
+							     "visible", LAYERS_SHOWTOGGLE_COLUMN,
+							     NULL);
+
+		g_signal_connect (renderer, "toggled",
+				  G_CALLBACK (pgd_layers_visibility_changed),
+				  (gpointer)demo);
+		gtk_tree_view_column_set_clickable (gtk_tree_view_get_column (GTK_TREE_VIEW (treeview), 1),
+						    TRUE);
+	}
+
+	gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview)),
+				     GTK_SELECTION_NONE);
+
+	gtk_container_add (GTK_CONTAINER (swindow), treeview);
+	gtk_widget_show (treeview);
+
+	gtk_paned_add1 (GTK_PANED (hpaned), swindow);
+	gtk_widget_show (swindow);
+
+	gtk_paned_add2 (GTK_PANED (hpaned), viewer);
+	gtk_widget_show (viewer);
+
+	gtk_paned_set_position (GTK_PANED (hpaned), 150);
+
+	g_object_weak_ref (G_OBJECT (hpaned),
+			   (GWeakNotify)pgd_layers_free,
+			   (gpointer)demo);
+
+	return hpaned;
+}
diff --git a/glib/demo/layers.h b/glib/demo/layers.h
new file mode 100644
index 00000000..88b43c38
--- /dev/null
+++ b/glib/demo/layers.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2008 Carlos Garcia Campos  <carlosgc@gnome.org>
+ *
+ * This program 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, or (at your option)
+ * any later version.
+ *
+ * This program 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 <gtk/gtk.h>
+#include <poppler.h>
+
+#ifndef _LAYERS_H_
+#define _LAYERS_H_
+
+G_BEGIN_DECLS
+
+GtkWidget *pgd_layers_create_widget (PopplerDocument *document);
+
+G_END_DECLS
+
+#endif /* _LAYERS_H_ */ 
diff --git a/glib/demo/main.c b/glib/demo/main.c
index 3c26e610..ebbb5953 100644
--- a/glib/demo/main.c
+++ b/glib/demo/main.c
@@ -31,6 +31,7 @@
 #include "images.h"
 #include "annots.h"
 #include "attachments.h"
+#include "layers.h"
 
 enum {
 	PGD_TITLE_COLUMN,
@@ -55,7 +56,8 @@ static const PopplerGlibDemo demo_list[] = {
 	{ "Page Transitions", pgd_transitions_create_widget },
 	{ "Images",           pgd_images_create_widget },
 	{ "Annots",           pgd_annots_create_widget },
-	{ "Attachments",      pgd_attachments_create_widget }
+	{ "Attachments",      pgd_attachments_create_widget },
+	{ "Layers",           pgd_layers_create_widget }
 };
 
 static void