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-'\"
-'\" Copyright (c) 1990-1994 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-'\" RCS: @(#) $Id$
-'\"
-.so man.macros
-.TH selection n 8.1 Tk "Tk Built-In Commands"
-.BS
-'\" Note: do not modify the .SH NAME line immediately below!
-.SH NAME
-selection \- Manipulate the X selection
-.SH SYNOPSIS
-\fBselection \fIoption\fR ?\fIarg arg ...\fR?
-.BE
-
-.SH DESCRIPTION
-.PP
-This command provides a Tcl interface to the X selection mechanism and
-implements the full selection functionality described in the
-X Inter-Client Communication Conventions Manual (ICCCM).
-.PP
-Note that for management of the CLIPBOARD selection (see below), the
-\fBclipboard\fR command may also be used.
-.PP
-The first argument to \fBselection\fR determines the format of the
-rest of the arguments and the behavior of the command. The following
-forms are currently supported:
-.PP
-.TP
-\fBselection clear\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR?
-If \fIselection\fR exists anywhere on \fIwindow\fR's display, clear it
-so that no window owns the selection anymore. \fISelection\fR
-specifies the X selection that should be cleared, and should be an
-atom name such as PRIMARY or CLIPBOARD; see the Inter-Client
-Communication Conventions Manual for complete details.
-\fISelection\fR defaults to PRIMARY and \fIwindow\fR defaults to ``.''.
-Returns an empty string.
-.TP
-\fBselection get\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR? ?\fB\-type\fR \fItype\fR?
-Retrieves the value of \fIselection\fR from \fIwindow\fR's display and
-returns it as a result. \fISelection\fR defaults to PRIMARY and
-\fIwindow\fR defaults to ``.''.
-\fIType\fR specifies the form in which the selection is to be returned
-(the desired ``target'' for conversion, in ICCCM terminology), and
-should be an atom name such as STRING or FILE_NAME; see the
-Inter-Client Communication Conventions Manual for complete details.
-\fIType\fR defaults to STRING. The selection owner may choose to
-return the selection in any of several different representation
-formats, such as STRING, ATOM, INTEGER, etc. (this format is different
-than the selection type; see the ICCCM for all the confusing details).
-If the selection is returned in a non-string format, such as INTEGER
-or ATOM, the \fBselection\fR command converts it to string format as a
-collection of fields separated by spaces: atoms are converted to their
-textual names, and anything else is converted to hexadecimal integers.
-.TP
-\fBselection handle\fR ?\fB\-selection\fR \fIselection\fR? ?\fB\-type\fR \fItype\fR? ?\fB\-format\fR \fIformat\fR? \fIwindow command\fR
-Creates a handler for selection requests, such that \fIcommand\fR will
-be executed whenever \fIselection\fR is owned by \fIwindow\fR and
-someone attempts to retrieve it in the form given by \fItype\fR
-(e.g. \fItype\fR is specified in the \fBselection get\fR command).
-\fISelection\fR defaults to PRIMARY, \fItype\fR defaults to STRING, and
-\fIformat\fR defaults to STRING. If \fIcommand\fR is an empty string
-then any existing handler for \fIwindow\fR, \fItype\fR, and
-\fIselection\fR is removed.
-.RS
-.PP
-When \fIselection\fR is requested, \fIwindow\fR is the selection owner,
-and \fItype\fR is the requested type, \fIcommand\fR will be executed
-as a Tcl command with two additional numbers appended to it
-(with space separators).
-The two additional numbers
-.VS
-are \fIoffset\fR and \fImaxChars\fR: \fIoffset\fR specifies a starting
-character position in the selection and \fImaxChars\fR gives the maximum
-number of characters to retrieve. The command should return a value consisting
-of at most \fImaxChars\fR of the selection, starting at position
-\fIoffset\fR. For very large selections (larger than \fImaxChars\fR)
-the selection will be retrieved using several invocations of \fIcommand\fR
-with increasing \fIoffset\fR values. If \fIcommand\fR returns a string
-whose length is less than \fImaxChars\fR, the return value is assumed to
-include all of the remainder of the selection; if the length of
-\fIcommand\fR's result is equal to \fImaxChars\fR then
-\fIcommand\fR will be invoked again, until it eventually
-returns a result shorter than \fImaxChars\fR. The value of \fImaxChars\fR
-will always be relatively large (thousands of characters).
-.VE
-.PP
-If \fIcommand\fR returns an error then the selection retrieval is rejected
-just as if the selection didn't exist at all.
-.PP
-The \fIformat\fR argument specifies the representation that should be
-used to transmit the selection to the requester (the second column of
-Table 2 of the ICCCM), and defaults to STRING. If \fIformat\fR is
-STRING, the selection is transmitted as 8-bit ASCII characters (i.e.
-just in the form returned by \fIcommand\fR). If \fIformat\fR is
-ATOM, then the return value from \fIcommand\fR is divided into fields
-separated by white space; each field is converted to its atom value,
-and the 32-bit atom value is transmitted instead of the atom name.
-For any other \fIformat\fR, the return value from \fIcommand\fR is
-divided into fields separated by white space and each field is
-converted to a 32-bit integer; an array of integers is transmitted
-to the selection requester.
-.PP
-The \fIformat\fR argument is needed only for compatibility with
-selection requesters that don't use Tk. If Tk is being
-used to retrieve the selection then the value is converted back to
-a string at the requesting end, so \fIformat\fR is
-irrelevant.
-.RE
-.TP
-\fBselection own\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR?
-.TP
-\fBselection own\fR ?\fB\-command\fR \fIcommand\fR? ?\fB\-selection\fR \fIselection\fR? \fIwindow\fR
-The first form of \fBselection own\fR returns the path name of the
-window in this application that owns \fIselection\fR on the display
-containing \fIwindow\fR, or an empty string if no window in this
-application owns the selection. \fISelection\fR defaults to PRIMARY and
-\fIwindow\fR defaults to ``.''.
-.PP
-The second form of \fBselection own\fR causes \fIwindow\fR to become
-the new owner of \fIselection\fR on \fIwindow\fR's display, returning
-an empty string as result. The existing owner, if any, is notified
-that it has lost the selection.
-If \fIcommand\fR is specified, it is a Tcl script to execute when
-some other window claims ownership of the selection away from
-\fIwindow\fR. \fISelection\fR defaults to PRIMARY.
-
-.SH "SEE ALSO"
-clipboard
-
-.SH KEYWORDS
-clear, format, handler, ICCCM, own, selection, target, type