2002-02-23  Michael Natterer  <mitch@gimp.org>

	General undo cleanup:

	* app/undo.[ch]: made all undo structs private. Changed all
	undo_push_foo() functions to take useful parameters instead of
	"gpointer foo_ptr" and create the undo structs internally.
	Renamed lots of functions so they are more self-explanatory
	(like undo_push_gimage_mod -> undo_push_image_size). Added some
	undo functions (channel reordering is undoable now).  Never pass
	in a UndoType, as they are reseved for groups now (see below).
	Lots of cleanup and stuff...

	* app/undo_types.h: is a private header now which defines "enum
	UndoImplType" which is reserved for actual undo operations.
	All enum values are named "FOO_UNDO".

	* app/core/core-types.h: added the "UndoType" enum here and don't
	include "undo_types.h" any more. The UndoType values are all
	named "FOO_UNDO_GROUP" and are reserved for undo groups.

	The ID space of actual undo operations and undo groups
	is now strictly disjunct.

	* app/core/gimpchannel.h
	* app/core/gimpimage.h
	* app/core/gimplayer.h
	* app/core/gimplayermask.h
	* app/paint/gimppaintcore.h
	* app/tools/gimptransformtool.h: removed undo stuct definitions.

	* app/undo_history.c
	* app/path_transform.h
	* app/core/gimpchannel.c
	* app/core/gimpdrawable-transform.c
	* app/core/gimpedit.c
	* app/core/gimpimage-convert.c
	* app/core/gimpimage-crop.c
	* app/core/gimpimage-mask.c
	* app/core/gimpimage-merge.c
	* app/core/gimpimage-qmask.c
	* app/core/gimpimage-resize.c
	* app/core/gimpimage-scale.c
	* app/core/gimpimage.c
	* app/core/gimplayer-floating-sel.c
	* app/core/gimplayer.c
	* app/display/gimpdisplayshell-dnd.c
	* app/gui/channels-commands.c
	* app/gui/image-commands.c
	* app/gui/layers-commands.c
	* app/gui/paths-dialog.c
	* app/paint/gimppaintcore.c
	* app/tools/gimpbezierselecttool.c
	* app/tools/gimpeditselectiontool.c
	* app/tools/gimpmeasuretool.c
	* app/tools/gimpmovetool.c
	* app/tools/gimptexttool.c
	* app/tools/gimptransformtool.c
	* tools/pdbgen/pdb/guides.pdb
	* tools/pdbgen/pdb/layer.pdb
	* tools/pdbgen/pdb/undo.pdb: changed accordingly.

	* app/pdb/guides_cmds.c
	* app/pdb/layer_cmds.c
	* app/pdb/undo_cmds.c: regenerated.

	* app/core/gimpimage.[ch]: added infrastructure for holding a
	GimpList of GimpVectors objects. The API is the same as for layers
	and channels. Not used yet.