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124 lines
4.5 KiB
EmacsLisp
124 lines
4.5 KiB
EmacsLisp
;;; s-region.el --- set region using shift key
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;; Copyright (C) 1994-1995, 2001-2012 Free Software Foundation, Inc.
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;; Author: Morten Welinder <terra@diku.dk>
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;; Keywords: terminals
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;; Favorite-brand-of-beer: None, I hate beer.
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;; Obsolete-since: 24.1
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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 3 of the License, or
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;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Having loaded this code you can set the region by holding down the
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;; shift key and move the cursor to the other end of the region. The
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;; functionality provided by this code is similar to that provided by
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;; the editors of Borland International's compilers for ms-dos.
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;; Currently, s-region-move may be bound only to events that are vectors
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;; of length one and whose last element is a symbol. Also, the functions
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;; that are given this kind of overlay should be (interactive "p")
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;; functions.
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;; If the following keys are not already bound then...
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;; C-insert is bound to copy-region-as-kill
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;; S-delete is bound to kill-region
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;; S-insert is bound to yank
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;;; Code:
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(defvar s-region-overlay (make-overlay 1 1))
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(overlay-put s-region-overlay 'face 'region)
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(overlay-put s-region-overlay 'priority 1000000) ; for hilit19
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(defun s-region-unshift (key)
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"Remove shift modifier from last keypress KEY and return that as a key."
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(if (vectorp key)
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(let ((last (aref key (1- (length key)))))
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(if (symbolp last)
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(let* ((keyname (symbol-name last))
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(pos (string-match "S-" keyname)))
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(if pos
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;; We skip all initial parts of the event assuming that
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;; those are setting up the prefix argument to the command.
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(vector (intern (concat (substring keyname 0 pos)
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(substring keyname (+ 2 pos)))))
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(error "Non-shifted key: %S" key)))
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(error "Key does not end in a symbol: %S" key)))
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(error "Non-vector key: %S" key)))
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(defun s-region-move-p1 (&rest arg)
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"This is an overlay function to point-moving keys that are interactive \"p\"."
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(interactive "p")
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(apply (function s-region-move) arg))
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(defun s-region-move-p2 (&rest arg)
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"This is an overlay function to point-moving keys that are interactive \"P\"."
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(interactive "P")
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(apply (function s-region-move) arg))
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(defun s-region-move (&rest arg)
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(if (if mark-active (not (equal last-command 's-region-move)) t)
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(set-mark-command nil)
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(message "")) ; delete the "Mark set" message
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(setq this-command 's-region-move)
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(apply (key-binding (s-region-unshift (this-command-keys))) arg)
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(move-overlay s-region-overlay (mark) (point) (current-buffer))
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(sit-for 1)
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(delete-overlay s-region-overlay))
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(defun s-region-bind (keylist &optional map)
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"Bind shifted keys in KEYLIST to `s-region-move-p1' or `s-region-move-p2'.
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Each key in KEYLIST is shifted and bound to one of the `s-region-move'
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functions provided it is already bound to some command or other.
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Optional second argument MAP specifies keymap to add binding to, defaulting
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to global keymap."
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(let ((p2 (list 'scroll-up 'scroll-down
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'beginning-of-buffer 'end-of-buffer)))
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(or map (setq map global-map))
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(while keylist
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(let* ((key (car keylist))
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(binding (key-binding key)))
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(if (commandp binding)
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(define-key
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map
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(vector (intern (concat "S-" (symbol-name (aref key 0)))))
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(cond ((memq binding p2)
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's-region-move-p2)
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(t 's-region-move-p1)))))
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(setq keylist (cdr keylist)))))
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;; Single keys (plus modifiers) only!
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(s-region-bind
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(list [right] [left] [up] [down]
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[C-left] [C-right] [C-up] [C-down]
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[M-left] [M-right] [M-up] [M-down]
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[next] [previous] [home] [end]
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[C-next] [C-previous] [C-home] [C-end]
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[M-next] [M-previous] [M-home] [M-end]))
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(or (global-key-binding [C-insert])
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(global-set-key [C-insert] 'copy-region-as-kill))
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(or (global-key-binding [S-delete])
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(global-set-key [S-delete] 'kill-region))
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(or (global-key-binding [S-insert])
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(global-set-key [S-insert] 'yank))
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(provide 's-region)
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;;; s-region.el ends here
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