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.

8 files changed, 216 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 20cbe9e..731dae9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+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.
+
 2006-12-25  Carlos Garcia Campos  <carlosgc@gnome.org>
 
 	* backend/ev-document-links.c: (ev_document_links_find_link_dest):
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 */
diff --git a/configure.ac b/configure.ac
index 39f9d8d..cfd8d66 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,9 +207,11 @@ if test "x$enable_pdf" = "xyes"; then
 	    FRONTEND_LIBS="$FRONTEND_LIBS $POPPLER_LIBS"
 	    SHELL_LIBS="$SHELL_LIBS $POPPLER_LIBS"
 	    SHELL_CFLAGS="$SHELL_CFLAGS $POPPLER_CFLAGS"
+
 	    evince_save_LIBS=$LIBS
 	    LIBS="$LIBS $FRONTEND_LIBS"
 	    AC_CHECK_FUNCS(poppler_page_render)
+	    AC_CHECK_FUNCS(poppler_page_get_duration)
 	    LIBS=$evince_save_LIBS
 
 	    PKG_CHECK_MODULES(CAIRO_PDF, cairo-pdf, enable_cairo_pdf=yes, enable_cairo_pdf=no)
diff --git a/pdf/ev-poppler.cc b/pdf/ev-poppler.cc
index 2e0e46a..479a741 100644
--- a/pdf/ev-poppler.cc
+++ b/pdf/ev-poppler.cc
@@ -38,6 +38,7 @@
 #include "ev-document-fonts.h"
 #include "ev-document-security.h"
 #include "ev-document-thumbnails.h"
+#include "ev-document-transition.h"
 #include "ev-selection.h"
 #include "ev-attachment.h"
 
@@ -86,6 +87,7 @@ static void pdf_document_document_fonts_iface_init      (EvDocumentFontsIface
 static void pdf_document_find_iface_init                (EvDocumentFindIface       *iface);
 static void pdf_document_file_exporter_iface_init       (EvFileExporterIface       *iface);
 static void pdf_selection_iface_init                    (EvSelectionIface          *iface);
+static void pdf_document_page_transition_iface_init     (EvDocumentTransitionIface *iface);
 static void pdf_document_thumbnails_get_dimensions      (EvDocumentThumbnails      *document_thumbnails,
 							 gint                       page,
 							 gint                       size,
@@ -119,6 +121,8 @@ G_DEFINE_TYPE_WITH_CODE (PdfDocument, pdf_document, G_TYPE_OBJECT,
 							pdf_document_file_exporter_iface_init);
 				 G_IMPLEMENT_INTERFACE (EV_TYPE_SELECTION,
 							pdf_selection_iface_init);
+				 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_TRANSITION,
+							pdf_document_page_transition_iface_init);
 			 });
 
 
@@ -1637,6 +1641,36 @@ pdf_selection_iface_init (EvSelectionIface *iface)
         iface->get_selection_map = pdf_selection_get_selection_map;
 }
 
+/* Page Transitions */
+static gdouble
+pdf_document_get_page_duration (EvDocumentTransition *trans,
+				gint                  page)
+{
+#ifdef HAVE_POPPLER_PAGE_GET_DURATION	
+	PdfDocument *pdf_document;
+	PopplerPage *poppler_page;
+	gdouble      duration = -1;
+
+	pdf_document = PDF_DOCUMENT (trans);
+	poppler_page = poppler_document_get_page (pdf_document->document, page);
+	if (!poppler_page)
+		return -1;
+
+	duration = poppler_page_get_duration (poppler_page);
+	g_object_unref (poppler_page);
+
+	return duration;
+#else
+	return -1;
+#endif /* HAVE_POPPLER_PAGE_GET_DURATION */
+}
+
+static void
+pdf_document_page_transition_iface_init (EvDocumentTransitionIface *iface)
+{
+	iface->get_page_duration = pdf_document_get_page_duration;
+}
+
 PdfDocument *
 pdf_document_new (void)
 {
diff --git a/shell/ev-view-private.h b/shell/ev-view-private.h
index d03a936..f1f5ad5 100644
--- a/shell/ev-view-private.h
+++ b/shell/ev-view-private.h
@@ -111,6 +111,7 @@ struct _EvView {
 	EvPresentationState presentation_state;
 	EvSizingMode sizing_mode_saved;
 	double scale_saved;
+	guint  trans_timeout_id;
 
 	/* Common for button press handling */
 	int pressed_button;
diff --git a/shell/ev-view.c b/shell/ev-view.c
index ad7ef61..a7bae3d 100644
--- a/shell/ev-view.c
+++ b/shell/ev-view.c
@@ -36,6 +36,7 @@
 #include "ev-selection.h"
 #include "ev-document-links.h"
 #include "ev-document-find.h"
+#include "ev-document-transition.h"
 #include "ev-document-misc.h"
 #include "ev-debug.h"
 #include "ev-job-queue.h"
@@ -312,6 +313,10 @@ static void       ev_view_primary_clear_cb                   (GtkClipboard
 							      gpointer            data);
 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 
+/*** Presentation ***/
+static void       ev_view_presentation_transition_start      (EvView             *ev_view);
+static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
+
 
 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 
@@ -2814,6 +2819,8 @@ ev_view_destroy (GtkObject *object)
 	    view->selection_update_id = 0;
 	}
 
+	ev_view_presentation_transition_stop (view);
+
 	ev_view_set_scroll_adjustments (view, NULL, NULL);
 
 	GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
@@ -3163,6 +3170,8 @@ page_changed_cb (EvPageCache *page_cache,
 	if (view->current_page != new_page) {
 		view->current_page = new_page;
 		view->pending_scroll = SCROLL_TO_PAGE_POSITION;
+		if (view->presentation)
+			ev_view_presentation_transition_start (view);
 		gtk_widget_queue_resize (GTK_WIDGET (view));
 	} else {
 		gtk_widget_queue_draw (GTK_WIDGET (view));
@@ -3427,6 +3436,11 @@ ev_view_set_presentation (EvView   *view,
 	
 	gtk_widget_queue_resize (GTK_WIDGET (view));
 
+	if (presentation)
+		ev_view_presentation_transition_start (view);
+	else
+		ev_view_presentation_transition_stop (view);
+
 	if (GTK_WIDGET_REALIZED (view)) {
 		if (view->presentation)
 			gdk_window_set_background (GTK_WIDGET(view)->window,
@@ -3447,6 +3461,40 @@ ev_view_get_presentation (EvView *view)
 	return view->presentation;
 }
 
+static gboolean
+transition_next_page (EvView *view)
+{
+	ev_view_next_page (view);
+
+	return FALSE;
+}
+
+static void
+ev_view_presentation_transition_stop (EvView *view)
+{
+	if (view->trans_timeout_id > 0)
+		g_source_remove (view->trans_timeout_id);
+	view->trans_timeout_id = 0;
+}
+
+static void
+ev_view_presentation_transition_start (EvView *view)
+{
+	gdouble duration;
+	
+	if (!EV_IS_DOCUMENT_TRANSITION (view->document))
+		return;
+
+	ev_view_presentation_transition_stop (view);
+
+	duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
+							     view->current_page);
+	if (duration > 0)
+		view->trans_timeout_id = g_timeout_add (duration * 1000,
+							(GSourceFunc) transition_next_page,
+							view);
+}
+
 void
 ev_view_set_sizing_mode (EvView       *view,
 			 EvSizingMode  sizing_mode)
@@ -4556,6 +4604,7 @@ ev_view_next_page (EvView *view)
 	if (!view->page_cache)
 		return FALSE;
 
+	ev_view_presentation_transition_stop (view);
 	ev_view_reset_presentation_state (view);
 	
 	page = ev_page_cache_get_current_page (view->page_cache);