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310 lines
10 KiB
EmacsLisp
310 lines
10 KiB
EmacsLisp
;;; select.el --- lisp portion of standard selection support.
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;; Keywords: internal
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;; Copyright (c) 1993, 1994 Free Software Foundation, Inc.
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;; Based partially on earlier release by Lucid.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Code:
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;; This is for temporary compatibility with pre-release Emacs 19.
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(defalias 'x-selection 'x-get-selection)
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(defun x-get-selection (&optional type data-type)
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"Return the value of an X Windows selection.
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The argument TYPE (default `PRIMARY') says which selection,
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and the argument DATA-TYPE (default `STRING') says how to convert the data."
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(x-get-selection-internal (or type 'PRIMARY) (or data-type 'STRING)))
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(defun x-get-clipboard ()
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"Return text pasted to the clipboard."
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(x-get-selection-internal 'CLIPBOARD 'STRING))
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(defun x-set-selection (type data)
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"Make an X Windows selection of type TYPE and value DATA.
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The argument TYPE (default `PRIMARY') says which selection,
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and DATA specifies the contents. DATA may be a string,
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a symbol, an integer (or a cons of two integers or list of two integers).
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The selection may also be a cons of two markers pointing to the same buffer,
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or an overlay. In these cases, the selection is considered to be the text
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between the markers *at whatever time the selection is examined*.
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Thus, editing done in the buffer after you specify the selection
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can alter the effective value of the selection.
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The data may also be a vector of valid non-vector selection values.
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Interactively, the text of the region is used as the selection value."
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(interactive (if (not current-prefix-arg)
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(list 'PRIMARY (read-string "Set text for pasting: "))
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(list 'PRIMARY (substring (region-beginning) (region-end)))))
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;; This is for temporary compatibility with pre-release Emacs 19.
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(if (stringp type)
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(setq type (intern type)))
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(or (x-valid-simple-selection-p data)
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(and (vectorp data)
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(let ((valid t)
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(i (1- (length data))))
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(while (>= i 0)
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(or (x-valid-simple-selection-p (aref data i))
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(setq valid nil))
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(setq i (1- i)))
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valid))
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(signal 'error (list "invalid selection" data)))
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(or type (setq type 'PRIMARY))
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(if data
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(x-own-selection-internal type data)
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(x-disown-selection-internal type))
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data)
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(defun x-valid-simple-selection-p (data)
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(or (stringp data)
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(symbolp data)
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(integerp data)
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(and (consp data)
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(integerp (car data))
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(or (integerp (cdr data))
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(and (consp (cdr data))
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(integerp (car (cdr data))))))
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(overlayp data)
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(and (consp data)
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(markerp (car data))
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(markerp (cdr data))
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(marker-buffer (car data))
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(marker-buffer (cdr data))
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(eq (marker-buffer (car data))
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(marker-buffer (cdr data)))
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(buffer-name (marker-buffer (car data)))
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(buffer-name (marker-buffer (cdr data))))))
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;;; Cut Buffer support
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(defun x-get-cut-buffer (&optional which-one)
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"Returns the value of one of the 8 X server cut-buffers. Optional arg
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WHICH-ONE should be a number from 0 to 7, defaulting to 0.
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Cut buffers are considered obsolete; you should use selections instead."
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(x-get-cut-buffer-internal
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(if which-one
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(aref [CUT_BUFFER0 CUT_BUFFER1 CUT_BUFFER2 CUT_BUFFER3
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CUT_BUFFER4 CUT_BUFFER5 CUT_BUFFER6 CUT_BUFFER7]
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which-one)
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'CUT_BUFFER0)))
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(defun x-set-cut-buffer (string &optional push)
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"Store STRING into the X server's primary cut buffer.
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If PUSH is non-nil, also rotate the cut buffers:
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this means the previous value of the primary cut buffer moves the second
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cut buffer, and the second to the third, and so on (there are 8 buffers.)
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Cut buffers are considered obsolete; you should use selections instead."
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;; Check the data type of STRING.
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(substring string 0 0)
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(if push
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(x-rotate-cut-buffers-internal 1))
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(x-store-cut-buffer-internal 'CUT_BUFFER0 string))
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;;; Functions to convert the selection into various other selection types.
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;;; Every selection type that Emacs handles is implemented this way, except
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;;; for TIMESTAMP, which is a special case.
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(defun xselect-convert-to-string (selection type value)
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(cond ((stringp value)
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value)
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((overlayp value)
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(save-excursion
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(or (buffer-name (overlay-buffer value))
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(error "selection is in a killed buffer"))
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(set-buffer (overlay-buffer value))
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(buffer-substring (overlay-start value)
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(overlay-end value))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(or (eq (marker-buffer (car value)) (marker-buffer (cdr value)))
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(signal 'error
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(list "markers must be in the same buffer"
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(car value) (cdr value))))
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(save-excursion
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(set-buffer (or (marker-buffer (car value))
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(error "selection is in a killed buffer")))
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(buffer-substring (car value) (cdr value))))
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(t nil)))
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(defun xselect-convert-to-length (selection type value)
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(let ((value
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(cond ((stringp value)
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(length value))
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((overlayp value)
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(abs (- (overlay-end value) (overlay-start value))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(or (eq (marker-buffer (car value))
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(marker-buffer (cdr value)))
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(signal 'error
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(list "markers must be in the same buffer"
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(car value) (cdr value))))
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(abs (- (car value) (cdr value)))))))
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(if value ; force it to be in 32-bit format.
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(cons (ash value -16) (logand value 65535))
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nil)))
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(defun xselect-convert-to-targets (selection type value)
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;; return a vector of atoms, but remove duplicates first.
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(let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist)))
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(rest all))
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(while rest
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(cond ((memq (car rest) (cdr rest))
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(setcdr rest (delq (car rest) (cdr rest))))
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((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
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(setcdr rest (cdr (cdr rest))))
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(t
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(setq rest (cdr rest)))))
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(apply 'vector all)))
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(defun xselect-convert-to-delete (selection type value)
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(x-disown-selection-internal selection)
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;; A return value of nil means that we do not know how to do this conversion,
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;; and replies with an "error". A return value of NULL means that we have
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;; done the conversion (and any side-effects) but have no value to return.
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'NULL)
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(defun xselect-convert-to-filename (selection type value)
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(cond ((overlayp value)
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(buffer-file-name (or (overlay-buffer value)
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(error "selection is in a killed buffer"))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(buffer-file-name (or (marker-buffer (car value))
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(error "selection is in a killed buffer"))))
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(t nil)))
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(defun xselect-convert-to-charpos (selection type value)
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(let (a b tmp)
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(cond ((cond ((overlayp value)
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(setq a (overlay-start value)
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b (overlay-end value)))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (car value)
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b (cdr value))))
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(setq a (1- a) b (1- b)) ; zero-based
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-lineno (selection type value)
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(let (a b buf tmp)
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(cond ((cond ((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (marker-position (car value))
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b (marker-position (cdr value))
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buf (marker-buffer (car value))))
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((overlayp value)
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(setq buf (overlay-buffer value)
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a (overlay-start value)
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b (overlay-end value)))
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)
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(save-excursion
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(set-buffer buf)
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(setq a (count-lines 1 a)
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b (count-lines 1 b)))
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-colno (selection type value)
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(let (a b buf tmp)
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(cond ((cond ((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(setq a (car value)
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b (cdr value)
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buf (marker-buffer a)))
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((overlayp value)
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(setq buf (overlay-buffer value)
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a (overlay-start value)
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b (overlay-end value)))
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)
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(save-excursion
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(set-buffer buf)
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(goto-char a)
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(setq a (current-column))
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(goto-char b)
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(setq b (current-column)))
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(if (< b a) (setq tmp a a b b tmp))
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(cons 'SPAN
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(vector (cons (ash a -16) (logand a 65535))
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(cons (ash b -16) (logand b 65535))))))))
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(defun xselect-convert-to-os (selection type size)
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(symbol-name system-type))
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(defun xselect-convert-to-host (selection type size)
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(system-name))
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(defun xselect-convert-to-user (selection type size)
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(user-full-name))
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(defun xselect-convert-to-class (selection type size)
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"Emacs")
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;; We do not try to determine the name Emacs was invoked with,
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;; because it is not clean for a program's behavior to depend on that.
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(defun xselect-convert-to-name (selection type size)
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"emacs")
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(defun xselect-convert-to-integer (selection type value)
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(and (integerp value)
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(cons (ash value -16) (logand value 65535))))
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(defun xselect-convert-to-atom (selection type value)
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(and (symbolp value) value))
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(defun xselect-convert-to-identity (selection type value) ; used internally
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(vector value))
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(setq selection-converter-alist
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'((TEXT . xselect-convert-to-string)
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(STRING . xselect-convert-to-string)
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(TARGETS . xselect-convert-to-targets)
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(LENGTH . xselect-convert-to-length)
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(DELETE . xselect-convert-to-delete)
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(FILE_NAME . xselect-convert-to-filename)
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(CHARACTER_POSITION . xselect-convert-to-charpos)
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(LINE_NUMBER . xselect-convert-to-lineno)
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(COLUMN_NUMBER . xselect-convert-to-colno)
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(OWNER_OS . xselect-convert-to-os)
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(HOST_NAME . xselect-convert-to-host)
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(USER . xselect-convert-to-user)
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(CLASS . xselect-convert-to-class)
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(NAME . xselect-convert-to-name)
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(ATOM . xselect-convert-to-atom)
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(INTEGER . xselect-convert-to-integer)
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(_EMACS_INTERNAL . xselect-convert-to-identity)
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))
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(provide 'select)
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;;; select.el ends here.
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