2004-01-26  Michael Natterer  <mitch@gimp.org>

	* plug-ins/script-fu/scripts/unsharp-mask.scm: add the layer to
	the image before pasting to it. Fixes bug #132504.

	Fixed the underlying problem: make it impossible to attach
	floating selections to drawables which are not currently part of
	the image's layer or channel stacks.
	Also cleaned up image <-> floating_sel interaction:

	* app/core/gimplayer-floating-sel.[ch] (floating_sel_attach):
	added assertion that the drawable is part of the image (see below).
	Don't call gimp_image_floating_selection_changed(), it's emitted
	by gimp_image_add_layer() now.

	(floating_sel_remove)
	(floating_sel_anchor): don't emit "floating_selection_changed",
	it's emitted by gimp_image_remove_layer() now.

	(floating_sel_anchor): removed the fix for bug #132162 because
	gimp_image_remove_layer() behaves correctly now (see below).

	Renamed floating_sel_reset() to floating_sel_activate_drawable().
	Added g_return_if_fail() all over the place.

	* app/core/gimpimage.[ch]: added new function gimp_image_owns_item()
	which return TRUE if the passed item is part of the image.

	(gimp_image_add_layer): emit "floating_selection_changed" here if
	needed.

	(gimp_image_remove_layer): emit "floating_selection_changed" if
	needed, don't try to activate a layer if we called
	floating_sel_activate_drawable().
	This is the real fix for bug #132162.

	* app/core/gimpimage-undo-push.c (undo_pop_layer): apply the same
	fixes as to gimp_image_add,remove_layer(). Don't call
	gimp_drawable_invalidate_preview() on the previously active layer
	because that's done by gimp_image_set_active_layer() now.

	* app/xcf/xcf-load.c: remember the "floating_sel_drawable" in the
	XcfInfo struct and attach it *after* all layers and channels are
	loaded to avoid attaching the floating selection to an
	out-of-image drawable.

	* app/core/gimp-edit.c (gimp_edit_paste)
	* app/core/gimpdrawable-transform.c (gimp_drawable_transform_affine,
	gimp_drawable_transform_flip, gimp_drawable_transform_rotate)
	* app/core/gimpselection.c (gimp_selection_float)
	* app/text/gimptext-compat.c (text_render): added checks for
	gimp_image_owns_item() in all functions which can produce
	floating selections.

	* tools/pdbgen/pdb/edit.pdb
	* tools/pdbgen/pdb/floating_sel.pdb
	* tools/pdbgen/pdb/selection.pdb
	* tools/pdbgen/pdb/text_tool.pdb
	* tools/pdbgen/pdb/transform_tools.pdb: added checks for
	gimp_item_owns_image() and return an execution error if invoked
	with a drawable which is not part of the image.

	* app/pdb/edit_cmds.c
	* app/pdb/floating_sel_cmds.c
	* app/pdb/selection_cmds.c
	* app/pdb/text_tool_cmds.c
	* app/pdb/transform_tools_cmds.c: regenerated.