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, 563 insertions, 0 deletions

diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c
new file mode 100644
index 0000000..3bf28d9
--- /dev/null
+++ b/libview/ev-view-accessible.c
@@ -0,0 +1,563 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/* this file is part of evince, a gnome document viewer
+ *
+ *  Copyright (C) 2004 Red Hat, Inc
+ *
+ * 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 <glib/gi18n.h>
+
+#include "ev-view-accessible.h"
+#include "ev-view-private.h"
+
+#define EV_TYPE_VIEW_ACCESSIBLE      (ev_view_accessible_get_type ())
+#define EV_VIEW_ACCESSIBLE(obj)      (G_TYPE_CHECK_INSTANCE_CAST ((obj), EV_TYPE_VIEW_ACCESSIBLE, EvViewAccessible))
+#define EV_IS_VIEW_ACCESSIBLE(obj)   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EV_TYPE_VIEW_ACCESSIBLE))
+
+static GType ev_view_accessible_get_type (void);
+
+enum {
+	ACTION_SCROLL_UP,
+	ACTION_SCROLL_DOWN,
+	LAST_ACTION
+};
+
+static const gchar *const ev_view_accessible_action_names[] = 
+{
+	N_("Scroll Up"),
+	N_("Scroll Down"),
+	NULL
+};
+
+static const gchar *const ev_view_accessible_action_descriptions[] = 
+{
+	N_("Scroll View Up"),
+	N_("Scroll View Down"),
+	NULL
+};
+
+typedef struct {
+	/* Action */
+	gchar *action_descriptions[LAST_ACTION];
+	guint action_idle_handler;  
+	GtkScrollType idle_scroll;	 
+} EvViewAccessiblePriv;
+
+typedef GtkAccessibleClass EvViewAccessibleClass;
+
+#define EV_VIEW_ACCESSIBLE_GET_PRIVATE(inst) (G_TYPE_INSTANCE_GET_PRIVATE ((inst), EV_TYPE_VIEW_ACCESSIBLE, EvViewAccessiblePriv))
+
+static void
+ev_view_accessible_finalize (GObject *object)
+{
+	EvViewAccessiblePriv *priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (object);
+	int i;
+	
+	if (priv->action_idle_handler)
+		g_source_remove (priv->action_idle_handler);
+	for (i = 0; i < LAST_ACTION; i++)	
+		g_free (priv->action_descriptions [i]);
+}
+
+static void ev_view_accessible_class_init (EvViewAccessibleClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ev_view_accessible_finalize;
+
+  g_type_class_add_private (klass, sizeof (EvViewAccessiblePriv));
+}
+
+static gchar*
+ev_view_accessible_get_text (AtkText *text,
+                     gint    start_pos,
+                     gint    end_pos)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+
+static gunichar 
+ev_view_accessible_get_character_at_offset (AtkText *text,
+                                    gint     offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return '\0';
+
+  return '\0';
+}
+
+static gchar*
+ev_view_accessible_get_text_before_offset (AtkText	    *text,
+				   gint		    offset,
+				   AtkTextBoundary  boundary_type,
+				   gint		    *start_offset,
+				   gint		    *end_offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+
+static gchar*
+ev_view_accessible_get_text_at_offset (AtkText          *text,
+                               gint             offset,
+                               AtkTextBoundary  boundary_type,
+                               gint             *start_offset,
+                               gint             *end_offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+
+static gchar*
+ev_view_accessible_get_text_after_offset  (AtkText	    *text,
+				   gint		    offset,
+				   AtkTextBoundary  boundary_type,
+				   gint		    *start_offset,
+				   gint		    *end_offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+
+static gint
+ev_view_accessible_get_character_count (AtkText *text)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return 0;
+
+  return 0;
+}
+
+static gint
+ev_view_accessible_get_caret_offset (AtkText *text)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return 0;
+ 
+  return 0;
+}
+
+static gboolean
+ev_view_accessible_set_caret_offset (AtkText *text, gint offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return FALSE;
+
+  return FALSE;
+}
+
+static AtkAttributeSet*
+ev_view_accessible_get_run_attributes (AtkText *text,
+			       gint    offset,
+                               gint    *start_offset,
+                               gint    *end_offset)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+ 
+  return NULL;
+}
+
+static AtkAttributeSet*
+ev_view_accessible_get_default_attributes (AtkText *text)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+  
+static void
+ev_view_accessible_get_character_extents (AtkText *text,
+				  gint    offset,
+		                  gint    *x,
+                    		  gint 	  *y,
+                                  gint 	  *width,
+                                  gint 	  *height,
+			          AtkCoordType coords)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return;
+
+  return;
+} 
+
+static gint 
+ev_view_accessible_get_offset_at_point (AtkText *text,
+                                gint x,
+                                gint y,
+			        AtkCoordType coords)
+{ 
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return -1;
+
+  return -1;
+}
+
+static gint
+ev_view_accessible_get_n_selections (AtkText              *text)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return -1;
+    
+  return -1;
+}
+
+static gchar*
+ev_view_accessible_get_selection (AtkText *text,
+			  gint    selection_num,
+                          gint    *start_pos,
+                          gint    *end_pos)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return NULL;
+
+  return NULL;
+}
+
+static gboolean
+ev_view_accessible_add_selection (AtkText *text,
+                          gint    start_pos,
+                          gint    end_pos)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return FALSE;
+
+  return FALSE;
+}
+
+static gboolean
+ev_view_accessible_remove_selection (AtkText *text,
+                             gint    selection_num)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return FALSE;
+
+  return FALSE;
+}
+
+static gboolean
+ev_view_accessible_set_selection (AtkText *text,
+			  gint	  selection_num,
+                          gint    start_pos,
+                          gint    end_pos)
+{
+  GtkWidget *widget;
+
+  widget = GTK_ACCESSIBLE (text)->widget;
+  if (widget == NULL)
+    /* State is defunct */
+    return FALSE;
+
+  return FALSE;
+}
+
+
+static void ev_view_accessible_text_iface_init (AtkTextIface * iface)
+{
+	g_return_if_fail (iface != NULL);
+
+	iface->get_text = ev_view_accessible_get_text;
+	iface->get_character_at_offset = ev_view_accessible_get_character_at_offset;
+	iface->get_text_before_offset = ev_view_accessible_get_text_before_offset;
+	iface->get_text_at_offset = ev_view_accessible_get_text_at_offset;
+	iface->get_text_after_offset = ev_view_accessible_get_text_after_offset;
+	iface->get_caret_offset = ev_view_accessible_get_caret_offset;
+	iface->set_caret_offset = ev_view_accessible_set_caret_offset;
+	iface->get_character_count = ev_view_accessible_get_character_count;
+	iface->get_n_selections = ev_view_accessible_get_n_selections;
+	iface->get_selection = ev_view_accessible_get_selection;
+	iface->add_selection = ev_view_accessible_add_selection;
+	iface->remove_selection = ev_view_accessible_remove_selection;
+	iface->set_selection = ev_view_accessible_set_selection;
+	iface->get_run_attributes = ev_view_accessible_get_run_attributes;
+	iface->get_default_attributes = ev_view_accessible_get_default_attributes;
+	iface->get_character_extents = ev_view_accessible_get_character_extents;
+	iface->get_offset_at_point = ev_view_accessible_get_offset_at_point;
+	return;
+}
+
+static gboolean
+ev_view_accessible_idle_do_action (gpointer data)
+{
+	EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (data);
+	
+	ev_view_scroll (EV_VIEW (GTK_ACCESSIBLE (data)->widget), 
+			priv->idle_scroll,
+			FALSE);
+	priv->action_idle_handler = 0;
+	return FALSE;
+}
+
+static gboolean
+ev_view_accessible_action_do_action (AtkAction *action,
+                                     gint       i)
+{
+	EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
+	
+	if (GTK_ACCESSIBLE (action)->widget == NULL)
+		return FALSE;
+
+	if (priv->action_idle_handler)
+		return FALSE;
+	
+	switch (i) {
+		case ACTION_SCROLL_UP:
+			priv->idle_scroll = GTK_SCROLL_PAGE_BACKWARD;
+			break;
+		case ACTION_SCROLL_DOWN:
+			priv->idle_scroll = GTK_SCROLL_PAGE_FORWARD;
+			break;
+		default:
+			return FALSE;
+	}
+	priv->action_idle_handler = g_idle_add (ev_view_accessible_idle_do_action, 
+						action);
+	return TRUE;
+}
+
+static gint
+ev_view_accessible_action_get_n_actions (AtkAction *action)
+{
+        return LAST_ACTION;
+}
+
+static const gchar *
+ev_view_accessible_action_get_description (AtkAction *action,
+                                           gint       i)
+{
+  EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
+
+  if (i < 0 || i >= LAST_ACTION) 
+    return NULL;
+
+  if (priv->action_descriptions[i])
+    return priv->action_descriptions[i];
+  else
+    return ev_view_accessible_action_descriptions[i];
+}
+
+static const gchar *
+ev_view_accessible_action_get_name (AtkAction *action,
+                                    gint       i)
+{
+  if (i < 0 || i >= LAST_ACTION) 
+    return NULL;
+
+  return ev_view_accessible_action_names[i];
+}
+
+static gboolean
+ev_view_accessible_action_set_description (AtkAction   *action,
+                                           gint         i,
+                                           const gchar *description)
+{
+  EvViewAccessiblePriv* priv = EV_VIEW_ACCESSIBLE_GET_PRIVATE (action);
+  gchar *old_description;
+
+  if (i < 0 || i >= LAST_ACTION) 
+    return FALSE;
+
+  old_description = priv->action_descriptions[i];
+  priv->action_descriptions[i] = g_strdup (description);
+  g_free (old_description);
+
+  return TRUE;
+}
+
+static void ev_view_accessible_action_iface_init (AtkActionIface * iface)
+{
+	iface->do_action = ev_view_accessible_action_do_action;
+	iface->get_n_actions = ev_view_accessible_action_get_n_actions;
+	iface->get_description = ev_view_accessible_action_get_description;
+	iface->get_name = ev_view_accessible_action_get_name;
+	iface->set_description = ev_view_accessible_action_set_description;
+}
+
+GType ev_view_accessible_get_type (void)
+{
+	static GType type = 0;
+
+	if (G_UNLIKELY (type == 0)) {
+		GTypeInfo tinfo = {
+			0,	/* class size */
+			(GBaseInitFunc) NULL,	/* base init */
+			(GBaseFinalizeFunc) NULL,	/* base finalize */
+			(GClassInitFunc) ev_view_accessible_class_init,	/* class init */
+			(GClassFinalizeFunc) NULL,	/* class finalize */
+			NULL,	/* class data */
+			0,	/* instance size */
+			0,	/* nb preallocs */
+ 			(GInstanceInitFunc) NULL,	/* instance init */
+			NULL	/* value table */
+		};
+
+		const GInterfaceInfo atk_text_info = {
+			(GInterfaceInitFunc)
+			    ev_view_accessible_text_iface_init,
+			(GInterfaceFinalizeFunc) NULL,
+			NULL
+		};
+
+		const GInterfaceInfo atk_action_info = {
+			(GInterfaceInitFunc)
+			    ev_view_accessible_action_iface_init,
+			(GInterfaceFinalizeFunc) NULL,
+			NULL
+		};
+	        /*
+    	         * Figure out the size of the class and instance
+		 * we are deriving from
+    		 */
+		AtkObjectFactory *factory;
+		GType derived_type;
+	        GTypeQuery query;
+    		GType derived_atk_type;	    
+
+    		derived_type = g_type_parent (EV_TYPE_VIEW);
+		factory = atk_registry_get_factory (atk_get_default_registry (), 
+                                        	    derived_type);
+    		derived_atk_type = atk_object_factory_get_accessible_type (factory);
+
+	        g_type_query (derived_atk_type, &query);
+    		tinfo.class_size = query.class_size;
+		tinfo.instance_size = query.instance_size;
+ 
+    		type = g_type_register_static (derived_atk_type, "EvViewAccessible",
+					       &tinfo, 0);
+		g_type_add_interface_static (type, ATK_TYPE_TEXT,
+					     &atk_text_info);
+		g_type_add_interface_static (type, ATK_TYPE_ACTION,
+					     &atk_action_info);
+	}
+
+	return type;
+}
+
+static AtkObject *ev_view_accessible_new(GObject * obj)
+{
+	AtkObject *accessible;
+	
+	g_return_val_if_fail(EV_IS_VIEW (obj), NULL);
+
+	accessible = g_object_new (ev_view_accessible_get_type (), NULL);
+	atk_object_initialize (accessible, obj);
+
+	atk_object_set_name (ATK_OBJECT (accessible), _("Document View"));
+	atk_object_set_role (ATK_OBJECT (accessible), ATK_ROLE_UNKNOWN);
+
+	return accessible;
+}
+
+typedef AtkObjectFactory      EvViewAccessibleFactory;
+typedef AtkObjectFactoryClass EvViewAccessibleFactoryClass;
+
+static void ev_view_accessible_factory_init (EvViewAccessibleFactory *factory)
+{
+}
+
+static GType ev_view_accessible_factory_get_accessible_type(void)
+{
+	return ev_view_accessible_get_type();
+}
+
+static AtkObject *ev_view_accessible_factory_create_accessible (GObject * obj)
+{
+	return ev_view_accessible_new(obj);
+}
+
+static void ev_view_accessible_factory_class_init (AtkObjectFactoryClass * klass)
+{
+	klass->create_accessible = ev_view_accessible_factory_create_accessible;
+	klass->get_accessible_type =
+	    ev_view_accessible_factory_get_accessible_type;
+}
+
+G_DEFINE_TYPE (EvViewAccessibleFactory, ev_view_accessible_factory, ATK_TYPE_OBJECT_FACTORY)