2004-01-15  Michael Natterer  <mitch@gimp.org>

	Fixed bug #78732 (don't paste off screen):

	* app/display/gimpdisplayshell-transform.[ch]: added new function
	gimp_display_shell_untransform_viewport() which returns the
	visible rectangle of the image in image coordinates.

	* app/core/gimp-edit.[ch] (gimp_edit_paste): added viewport
	parameters and changed positioning of the pasted layer as follows:

	- if there is a selection, center on the selection (just as before).
	- if there is no viewport, center on the active drawable.
	- if the viewport intersects with the active drawable, center
	  on the intersection.
	- if the viewport does *not* intersect with the active drawable,
	  center on the active drawable (off-screen, but better than pasting
	  something that will be invisible due to floating selection clipping).
	- if there is no active drawable, center on the viewport.
	- if there is no active drawable and no viewport, center on the image.

	* app/widgets/gimpbufferview.c (gimp_buffer_view_paste_clicked)
	(gimp_buffer_view_paste_into_clicked)
	* app/display/gimpdisplayshell-dnd.c (gimp_display_shell_drop_buffer)
	* app/gui/edit-commands.c (edit_paste_cmd_callback)
	(edit_paste_into_cmd_callback): ask the shell for the viewport
	and pass it to gimp_edit_paste().

	* app/display/gimpdisplayshell-dnd.c
	(gimp_display_shell_drop_drawable): center the created layer on
	the viewport.

	* app/tools/gimpmovetool.c (gimp_move_tool_button_release): use
	gimp_display_shell_untransform_viewport() (its code was taken from
	here).

	* tools/pdbgen/pdb/edit.pdb: pass "no viewport" to gimp_edit_paste().

	* app/pdb/edit_cmds.c: regenerated.