[elpa] externals/xclip d778c36 01/18: Add xclip.el.

[Stefan Monnier]

branch: externals/xclip
commit d778c36c705696fde875c3caddb157d5e5b0ee39
Author: Leo Liu <sdl.web@gmail.com>
Commit: Stefan Monnier <monnier@iro.umontreal.ca>

    Add xclip.el.
---
 xclip.el | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)

diff --git a/xclip.el b/xclip.el
new file mode 100644
index 0000000..5b5e28e
--- /dev/null
+++ b/xclip.el
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+;;; xclip.el --- Emacs Interface to XClip
+
+;; Copyright (C) 2007  Leo Shidai Liu
+
+;; Author: Leo Shidai Liu <shidai.liu@gmail.com>
+;; Keywords: convenience, tools
+;; Created: 2007-12-30
+
+;; $Id: xclip.el,v 0.9 2008/02/10 11:12:56 leo Exp $
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This code provides an Emacs interface to the tool with the same
+;; name on http://people.debian.org/~kims/xclip/.
+
+;;; Code:
+(defvar xclip-program (executable-find "xclip")
+  "Name of XClip program tool.")
+
+(defvar xclip-select-enable-clipboard t
+  "Non-nil means cutting and pasting uses the clipboard.
+This is in addition to, but in preference to, the primary selection.")
+
+(defvar xclip-last-selected-text-clipboard nil
+  "The value of the CLIPBOARD X selection from xclip.")
+
+(defvar xclip-last-selected-text-primary nil
+  "The value of the PRIMARY X selection from xclip.")
+
+(defun xclip-set-selection (type data)
+  "TYPE is a symbol: primary, secondary and clipboard.
+
+See `x-set-selection'."
+  (when (and xclip-program (getenv "DISPLAY"))
+    (let* ((process-connection-type nil)
+           (proc (start-process "xclip" nil "xclip"
+                                "-selection" (symbol-name type))))
+      (process-send-string proc data)
+      (process-send-eof proc))))
+
+(defun xclip-select-text (text &optional push)
+  "See `x-select-text'."
+  (xclip-set-selection 'primary text)
+  (setq xclip-last-selected-text-primary text)
+  (when xclip-select-enable-clipboard
+    (xclip-set-selection 'clipboard text)
+    (setq xclip-last-selected-text-clipboard text)))
+
+(defun xclip-selection-value ()
+  "See `x-cut-buffer-or-selection-value'."
+  (when (and xclip-program (getenv "DISPLAY"))
+    (let (clip-text primary-text)
+      (when xclip-select-enable-clipboard
+        (setq clip-text (shell-command-to-string "xclip -o -selection 
clipboard"))
+        (setq clip-text
+              (cond ;; check clipboard selection
+               ((or (not clip-text) (string= clip-text ""))
+                (setq xclip-last-selected-text-primary nil))
+               ((eq      clip-text xclip-last-selected-text-clipboard) nil)
+               ((string= clip-text xclip-last-selected-text-clipboard)
+                ;; Record the newer string,
+                ;; so subsequent calls can use the `eq' test.
+                (setq xclip-last-selected-text-clipboard clip-text)
+                nil)
+               (t (setq xclip-last-selected-text-clipboard clip-text)))))
+      (setq primary-text (shell-command-to-string "xclip -o"))
+      (setq primary-text
+            (cond ;; check primary selection
+             ((or (not primary-text) (string= primary-text ""))
+              (setq xclip-last-selected-text-primary nil))
+             ((eq      primary-text xclip-last-selected-text-primary) nil)
+             ((string= primary-text xclip-last-selected-text-primary)
+              ;; Record the newer string,
+              ;; so subsequent calls can use the `eq' test.
+              (setq xclip-last-selected-text-primary primary-text)
+              nil)
+             (t (setq xclip-last-selected-text-primary primary-text))))
+      (or clip-text primary-text))))
+
+;;;###autoload
+(defun turn-on-xclip ()
+  (interactive)
+  (setq interprogram-cut-function 'xclip-select-text)
+  (setq interprogram-paste-function 'xclip-selection-value))
+
+;;;###autoload
+(defun turn-off-xclip ()
+  (interactive)
+  (setq interprogram-cut-function nil)
+  (setq interprogram-paste-function nil))
+
+
+(add-hook 'terminal-init-xterm-hook 'turn-on-xclip)
+
+
+(provide 'xclip)
+;;; xclip.el ends here