2008-08-28  Martin Nordholts  <martinn@svn.gnome.org>

	* app/core/gimpimage.[ch]: Make the size-changed-detailed signal
	also contain previous image size.

	* app/display/gimpdisplayshell-handlers.c
	(gimp_display_shell_size_changed_detailed_handler): Take the
	previous image size into account and center the image if it starts
	to fit (axis indepentently) in the viewport due to the resize.

	* app/core/gimpundo.h
	* app/core/gimpimage-undo.c
	* app/core/gimpimageundo.[ch]
	* app/core/gimpimage-undo-push.[ch]: Manage the
	previous-size-information.

	* app/core/gimpimage-crop.c
	* app/core/gimpimage-scale.c
	* app/core/gimpimage-rotate.c
	* app/core/gimpimage-resize.c: Propagate previous size to the
	size-changed-detailed signal emission and the undo-system.

svn path=/trunk/; revision=26804