[elpa] externals/idlwave 51392dcc6f 069/360: Initial import

[ELPA Syncer]

branch: externals/idlwave
commit 51392dcc6fd3d02d7c087e4b436bea9fceb870d3
Author: jdsmith <jdsmith>
Commit: jdsmith <jdsmith>

    Initial import
---
 idlw-roprompt.el | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)

diff --git a/idlw-roprompt.el b/idlw-roprompt.el
new file mode 100644
index 0000000000..82d2407839
--- /dev/null
+++ b/idlw-roprompt.el
@@ -0,0 +1,126 @@
+;; idlw-shell.el --- run IDL as an inferior process of Emacs.
+;; Copyright (c) 2002 Free Software Foundation
+
+;; Author: J.D. Smith <jdsmith@as.arizona.edu>
+;; Maintainer: J.D. Smith <jdsmith@as.arizona.edu>
+;; Version: 1.0
+;; Date: $Date: 2002/10/11 23:20:44 $
+;; Keywords: processes
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs 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., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+;;
+;; Advises the appropriate comint function to make the IDL> prompt
+;; read-only.  This functionality may be available in future versions
+;; of comint directy, in which case this file will be obviated.
+;;
+;; New versions of IDLWAVE, documentation, and more information
+;; available from:
+;;                 http://idlwave.org
+;;
+;; INSTALLATION:
+;; =============
+;; 
+;; Follow the instructions in the INSTALL file of the distribution.
+;; In short, put this file on your load path and add the following
+;; lines to your .emacs file:
+;;
+;;   (add-hook 'idlwave-shell-mode-hook
+;;             (lambda () (require 'idlw-roprompt)))
+;;
+;;
+;; SOURCE
+;; ======
+;;
+;;   The newest version of this file can be found on the maintainers
+;;   web site.
+;; 
+;;     http://idlwave.org
+;; 
+;; DOCUMENTATION
+;; =============
+;;
+;; IDLWAVE is documented online in info format.
+;; A printable version of the documentation is available from the
+;; maintainers webpage (see under SOURCE)
+;;
+;;
+;; KNOWN PROBLEMS
+;; ==============
+;; 
+;; This functionality will probably fail for some future version of
+;; comint.
+;;
+;;--------------------------------------------------------------------------
+;;
+
+;;; Code:
+(when (fboundp 'comint-snapshot-last-prompt)
+  (defvar idlwave-shell-save-comint-last-prompt-overlay nil)
+  (defun idlwave-shell-comint-signal-read-only (overlay after start end 
+                                                       &optional len)
+    (if (and (not after)
+            (or (< (overlay-start overlay) start)
+                (> (overlay-end overlay) end)))
+       (error "")))
+
+  ;; Caution: in Emacs <~21.2, a new overlay gets created for each
+  ;; prompt... in later versions, text-properties for old prompts
+  ;; are used instead, and the original overlay is recycled.  In
+  ;; this case, we can advise snapshot-prompt to remove the
+  ;; read-only text properties (not the overlay properties), and
+  ;; here we test to ensure the prompt isn't in the same position as
+  ;; the process-mark before removing the read-only stuff.
+  (defadvice idlwave-shell-comint-filter (around swap-read-only activate)
+    "Add a read-only equivalency to the last prompt overlay."
+    (when (and idlwave-shell-save-comint-last-prompt-overlay 
+              (not (equal
+                    (marker-position (process-mark 
+                                      (get-buffer-process 
+                                       (get-buffer (idlwave-shell-buffer)))))
+                    (overlay-end 
+                     idlwave-shell-save-comint-last-prompt-overlay))))
+      (overlay-put idlwave-shell-save-comint-last-prompt-overlay 
+                  'modification-hooks nil)
+      (overlay-put idlwave-shell-save-comint-last-prompt-overlay 
+                  'insert-in-front-hooks nil))
+    ad-do-it
+    (save-current-buffer
+      (set-buffer (idlwave-shell-buffer))
+      (when comint-last-prompt-overlay
+       (setq idlwave-shell-save-comint-last-prompt-overlay 
+             comint-last-prompt-overlay)
+;      (overlay-put comint-last-prompt-overlay 'intangible t)
+       (overlay-put comint-last-prompt-overlay 'modification-hooks 
+                    '(idlwave-shell-comint-signal-read-only))
+       (overlay-put comint-last-prompt-overlay 'insert-in-front-hooks 
+                    '(idlwave-shell-comint-signal-read-only)))))
+
+  (defadvice comint-snapshot-last-prompt (after remove-text-read-only activate)
+    "Remove the read-only text properties potentially set by snapshot"
+    (save-current-buffer
+      (set-buffer (idlwave-shell-buffer))
+      (when comint-last-prompt-overlay
+       (remove-text-properties 
+        (overlay-start comint-last-prompt-overlay)
+        (overlay-end comint-last-prompt-overlay)
+        '(modification-hooks nil insert-in-front-hooks nil))))))
+
+(provide 'idlw-roprompt)
+;;; idlw-roprompt.el ends here
\ No newline at end of file