/* X Selection processing for emacs
- Copyright (C) 1990, 1992 Free Software Foundation.
+ Copyright (C) 1990, 1992, 1993 Free Software Foundation.
This file is part of GNU Emacs.
If we are already the owner, merely change data and timestamp values.
This avoids generating SelectionClear events for ourselves. */
-DEFUN ("x-own-selection", Fx_own_selection, Sx_own_selection,
- 1, 2, "",
- "Make STRING the selection value. Default is the primary selection,\n\
-but optional second argument TYPE may specify secondary or clipboard.\n\
+DEFUN ("x-set-selection", Fx_set_selection, Sx_set_selection,
+ 2, 2, "",
+ "Set the value of SELECTION to STRING.\n\
+SELECTION may be `primary', `secondary', or `clipboard'.\n\
\n\
-TYPE may also be cut-buffer0, indicating that Emacs should set the X\n\
-cut buffer 0 to STRING. This is for compatibility with older X\n\
-applications which still use the cut buffers; new applications should\n\
-use X selections.")
- (string, type)
- register Lisp_Object string, type;
+Selections are a mechanism for cutting and pasting information between\n\
+X Windows clients. Emacs's kill ring commands set the `primary'\n\
+selection to the top string of the kill ring, making it available to\n\
+other clients, like xterm. Those commands also use the `primary'\n\
+selection to retrieve information from other clients.\n\
+\n\
+According to the Inter-Client Communications Conventions Manual:\n\
+\n\
+The `primary' selection \"... is used for all commands that take only a\n\
+ single argument and is the principal means of communication between\n\
+ clients that use the selection mechanism.\" In Emacs, this means\n\
+ that the kill ring commands set the primary selection to the text\n\
+ put in the kill ring.\n\
+\n\
+The `secondary' selection \"... is used as the second argument to\n\
+ commands taking two arguments (for example, `exchange primary and\n\
+ secondary selections'), and as a means of obtaining data when there\n\
+ is a primary selection and the user does not want to disturb it.\"\n\
+ I am not sure how Emacs should use the secondary selection; if you\n\
+ come up with ideas, this function will at least let you get at it.\n\
+\n\
+The `clipboard' selection \"... is used to hold data that is being\n\
+ transferred between clients, that is, data that usually is being\n\
+ cut or copied, and then pasted.\" It seems that the `clipboard'\n\
+ selection is for the most part equivalent to the `primary'\n\
+ selection, so Emacs sets them both.\n\
+\n\
+Also see `x-selection', and the `interprogram-cut-function' variable.")
+ (selection, string)
+ register Lisp_Object selection, string;
{
Atom selection_type;
Lisp_Object val;
val = Qnil;
- if (NILP (type) || EQ (type, Qprimary))
+ if (NILP (selection) || EQ (selection, Qprimary))
{
BLOCK_INPUT;
if (own_selection (XA_PRIMARY, event_time))
}
UNBLOCK_INPUT;
}
- else if (EQ (type, Qsecondary))
+ else if (EQ (selection, Qsecondary))
{
BLOCK_INPUT;
if (own_selection (XA_SECONDARY, event_time))
}
UNBLOCK_INPUT;
}
- else if (EQ (type, Qclipboard))
+ else if (EQ (selection, Qclipboard))
{
BLOCK_INPUT;
if (own_selection (Xatom_clipboard, event_time))
}
UNBLOCK_INPUT;
}
-#if 0
- else if (EQ (type, Qcut_buffer0))
- {
- /* DECwindows and some other servers don't seem to like setting
- properties to values larger than about 20k. For very large
- values, they signal an error, but for intermediate values
- they just seem to hang.
-
- We could just truncate the request, but it's better to let
- the user know that the strategy he/she's using isn't going to
- work than to have it work partially, but incorrectly. */
- BLOCK_INPUT;
- if (XSTRING (string)->size > MAX_SELECTION (x_current_display))
- {
- XStoreBytes (x_current_display, (char *) 0, 0);
- val = Qnil;
- }
- else
- {
- XStoreBytes (x_current_display,
- (char *) XSTRING (string)->data,
- XSTRING (string)->size);
- val = string;
- }
- UNBLOCK_INPUT;
- }
-#endif
else
error ("Invalid X selection type");
simply return our selection value. If we are not the owner, this
will block until all of the data has arrived. */
-DEFUN ("x-selection-value", Fx_selection_value, Sx_selection_value,
- 0, 1, "",
- "Return the value of one of the selections. Default is the primary\n\
-selection, but optional argument TYPE may specify secondary or clipboard.")
- (type)
- register Lisp_Object type;
+DEFUN ("x-selection", Fx_selection, Sx_selection,
+ 1, 1, "",
+ "Return the value of SELECTION.\n\
+SELECTION is one of `primary', `secondary', or `clipboard'.\n\
+\n\
+Selections are a mechanism for cutting and pasting information between\n\
+X Windows clients. When the user selects text in an X application,\n\
+the application should set the primary selection to that text; Emacs's\n\
+kill ring commands will then check the value of the `primary'\n\
+selection, and return it as the most recent kill.\n\
+The documentation for `x-set-selection' gives more information on how\n\
+the different selection types are intended to be used.\n\
+Also see the `interprogram-paste-function' variable.")
+ (selection)
+ register Lisp_Object selection;
{
Atom selection_type;
- if (NILP (type) || EQ (type, Qprimary))
+ if (NILP (selection) || EQ (selection, Qprimary))
{
if (!NILP (Vx_selection_value))
return Vx_selection_value;
return get_selection_value (XA_PRIMARY);
}
- else if (EQ (type, Qsecondary))
+ else if (EQ (selection, Qsecondary))
{
if (!NILP (Vx_secondary_selection_value))
return Vx_secondary_selection_value;
return get_selection_value (XA_SECONDARY);
}
- else if (EQ (type, Qclipboard))
+ else if (EQ (selection, Qclipboard))
{
if (!NILP (Vx_clipboard_value))
return Vx_clipboard_value;
return get_selection_value (Xatom_clipboard);
}
-#if 0
- else if (EQ (type, Qcut_buffer0))
- {
- char *data;
- int size;
- Lisp_Object string;
-
- BLOCK_INPUT;
- data = XFetchBytes (x_current_display, &size);
- if (data == 0)
- string = Qnil;
- else
- string = make_string (data, size);
- UNBLOCK_INPUT;
-
- return string;
- }
-#endif
else
error ("Invalid X selection type");
}
Qclipboard = intern ("clipboard");
staticpro (&Qclipboard);
- defsubr (&Sx_own_selection);
- defsubr (&Sx_selection_value);
+ defsubr (&Sx_set_selection);
+ defsubr (&Sx_selection);
cut_buffer_value = Fmake_vector (make_number (NUM_CUT_BUFFERS), Qnil);
staticpro (&cut_buffer_value);
HCoop / bpt / emacs.git / blobdiff