Add page transition support in presentation mode. At the moment only page

2006-12-27  Carlos Garcia Campos  <carlosgc@gnome.org>
	* configure.ac:
	* backend/Makefile.am:
	* backend/ev-document-transition.[ch]:
	* pdf/ev-poppler.cc: (pdf_document_get_page_duration),
	(pdf_document_page_transition_iface_init):
	* shell/ev-view-private.h:
	* shell/ev-view.c: (ev_view_destroy), (page_changed_cb),
	(ev_view_set_presentation), (transition_next_page),
	(ev_view_presentation_transition_stop),
	(ev_view_presentation_transition_start), (ev_view_next_page):
	Add page transition support in presentation mode. At the moment only
	page duration is supported, but not transition effects. Fixes bug
	#309815.

3 files changed, 113 insertions, 0 deletions

diff --git a/backend/Makefile.am b/backend/Makefile.am
index 2de2f5f..54dbd2c 100644
--- a/backend/Makefile.am
+++ b/backend/Makefile.am
@@ -43,6 +43,8 @@ libevbackend_la_SOURCES=			\
 	ev-document-find.c			\
 	ev-document-find.h			\
 	ev-document-info.h			\
+	ev-document-transition.h		\
+	ev-document-transition.c		\
 	ev-file-exporter.c			\
 	ev-file-exporter.h			\
 	ev-render-context.h			\
diff --git a/backend/ev-document-transition.c b/backend/ev-document-transition.c
new file mode 100644
index 0000000..274da7c
--- /dev/null
+++ b/backend/ev-document-transition.c
@@ -0,0 +1,55 @@
+/* ev-document-transition.c
+ *  this file is part of evince, a gnome document viewer
+ * 
+ * Copyright (C) 2006 Carlos Garcia Campos <carlosgc@gnome.org>
+ *
+ * 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 "ev-document-transition.h"
+
+GType
+ev_document_transition_get_type (void)
+{
+	static GType type = 0;
+
+	if (G_UNLIKELY (type == 0)) {
+		const GTypeInfo our_info = {
+			sizeof (EvDocumentTransitionIface),
+			NULL,
+			NULL,
+		};
+
+		type = g_type_register_static (G_TYPE_INTERFACE,
+					       "EvDocumentTransition",
+					       &our_info, (GTypeFlags)0);
+	}
+
+	return type;
+}
+
+gdouble
+ev_document_transition_get_page_duration (EvDocumentTransition *document_trans,
+					  gint                  page)
+{
+	EvDocumentTransitionIface *iface = EV_DOCUMENT_TRANSITION_GET_IFACE (document_trans);
+
+	if (iface->get_page_duration)
+		return iface->get_page_duration (document_trans, page);
+
+	return -1;
+}
+
+
diff --git a/backend/ev-document-transition.h b/backend/ev-document-transition.h
new file mode 100644
index 0000000..3ca55ab
--- /dev/null
+++ b/backend/ev-document-transition.h
@@ -0,0 +1,56 @@
+/* ev-document-transition.h
+ *  this file is part of evince, a gnome document viewer
+ * 
+ * Copyright (C) 2006 Carlos Garcia Campos <carlosgc@gnome.org>
+ *
+ * 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.
+ */
+
+#ifndef EV_DOCUMENT_TRANSITION_H
+#define EV_DOCUMENT_TRANSITION_H
+
+#include <glib-object.h>
+
+#include "ev-document.h"
+
+G_BEGIN_DECLS
+
+#define EV_TYPE_DOCUMENT_TRANSITION	       (ev_document_transition_get_type ())
+#define EV_DOCUMENT_TRANSITION(o)	       (G_TYPE_CHECK_INSTANCE_CAST ((o), EV_TYPE_DOCUMENT_TRANSITION, EvDocumentTransition))
+#define EV_DOCUMENT_TRANSITION_IFACE(k)	       (G_TYPE_CHECK_CLASS_CAST((k), EV_TYPE_DOCUMENT_TRANSITION, EvDocumentTransitionIface))
+#define EV_IS_DOCUMENT_TRANSITION(o)	       (G_TYPE_CHECK_INSTANCE_TYPE ((o), EV_TYPE_DOCUMENT_TRANSITION))
+#define EV_IS_DOCUMENT_TRANSITION_IFACE(k)     (G_TYPE_CHECK_CLASS_TYPE ((k), EV_TYPE_DOCUMENT_TRANSITION))
+#define EV_DOCUMENT_TRANSITION_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), EV_TYPE_DOCUMENT_TRANSITION, EvDocumentTransitionIface))
+
+typedef struct _EvDocumentTransition      EvDocumentTransition;
+typedef struct _EvDocumentTransitionIface EvDocumentTransitionIface;
+
+struct _EvDocumentTransitionIface
+{
+	GTypeInterface base_iface;
+
+	/* Methods  */
+	gdouble       (* get_page_duration)  (EvDocumentTransition *document_trans,
+					      gint                  page);
+	/* TODO: Support page transition effects (page 562 PDF Reference 1.6) */
+};
+
+GType   ev_document_transition_get_type          (void) G_GNUC_CONST;
+gdouble ev_document_transition_get_page_duration (EvDocumentTransition *document_trans,
+						  gint                  page);
+
+G_END_DECLS
+
+#endif /* EV_DOCUMENT_TRANSITION_H */