2006-06-21  Matthias Clasen  <mclasen@redhat.com>

	Apply a patch by John Palmieri to use buffered io using
	GIOChannels, clean up error handling and support Cups 1.2
	api in the printing code.

	* acconfig.h:
	* configure.in: Detect Cups 1.2

	* gtk/gtkdebug.h:
	* gtk/gtkmain.c: Add a printing debug key.

	* gtk/gtkprintbackend.[hc]: Remove the GError parameter from
	gtk_print_backend_print_stream, and take a  GIOChannel instead
	of an fd.

	* gtk/gtkprinter-private.h:
	* gtk/gtkprinter.c: Replace the fd parameter of
	_gtk_printer_create_cairo_surface by a GIOChannel.

	* gtk/gtkprintjob.[hc]: Remove the GError parameter from
	gtk_print_job_send and make it return void.

	* gtk/gtkprintoperation-unix.c:
	* gtk/gtkprintjob.c: Adjust callers, add some debugging support.

	* modules/printbackends/Makefile.am: Fix DIST_SUBDIRS.

	* modules/printbackends/cups/Makefile.am:
	* modules/printbackends/lpr/Makefile.am: Add debug CFLAGS.

	* modules/printbackends/cups/gtkcupsutils.[hc]:
	* modules/printbackends/cups/gtkprintbackendcups.c:
	* modules/printbackends/file/gtkprintbackendfile.c:
	* modules/printbackends/lpr/gtkprintbackendfile.c: Adapt to
	the GIOChannel and GError changes, add debug output