2004-03-21  Sven Neumann  <sven@gimp.org>

	* app/core/gimpundo.[ch]: added gimp_undo_type_to_name() a similar
	function used to live in gimpimage-undo.[ch].

	* app/core/gimpitemundo.c (gimp_item_undo_new): allow NULL as name
	and generate it from the undo_type then.

	* app/core/gimpimage-undo.[ch]: added gimp_image_undo_push_undu(),
	new function that allows to push an undo on the image.

	* app/text/Makefile.am
	* app/text/text-types.h
	* app/text/gimptextundo.[ch]: added GimpTextUndo, derived from
	GimpItemUndo.

	* app/core/gimpimage-undo-push.c (gimp_image_undo_push_text_layer):
	use the new code and simply push a text undo here.

	* app/tools/gimptexttool.c: compress text undos by peeking at the
	undo stack. Fixes bug #137766.