Support text/plain selection target (#55117, Owen Taylor)

Support text/plain selection target (#55117, Owen Taylor)

Sat Jul 17 00:48:27 2004  Matthias Clasen  <maclas@gmx.de>

	Support text/plain selection target  (#55117, Owen Taylor)

	* gtk/gtkselection.h:
	* gtk/gtkdnd.h:
	* gtk/gtkselection.c (gtk_target_list_add_text_targets):
	* gtk/gtkdnd.c (gtk_drag_dest_add_text_targets):
	* gtk/gtkdnd.c (gtk_drag_source_add_text_targets): New
	functions to facilitate handling of text targets.

	* gtk/gtkentry.c:
	* gtk/gtktextview.c: Use the new text target handling
	functions instead of hardwiring the list of supported
	text targets everywhere.

	* gtk/gtkselection.c (gtk_selection_data_get_text):
	(gtk_selection_data_set_text):
	Support the targets text/plain, text/plain?charset=utf-8
	and text/plain?charset=<LOCALE-CHARSET> as outlined in
	#55117:
	For text/plain send only ASCII, but accept 8-bit text
	and treat it as ISO-8859-1 as specified by the Xdnd spec.
	Always send CRLF terminators. Accept either and convert
	into the native terminator for the platform.