Rename adaptive-wrap-prefix to adaptive-wrap.

[gnu-emacs-elpa] / packages / adaptive-wrap / adaptive-wrap.el

diff --git a/packages/adaptive-wrap/adaptive-wrap.el b/packages/adaptive-wrap/adaptive-wrap.el
new file mode 100644 (file)
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+++ b/packages/adaptive-wrap/adaptive-wrap.el
@@ -0,0 +1,55 @@
+;;; adaptive-wrap.el --- Smart line-wrapping with wrap-prefix
+
+;; Copyright (C) 2011  Stefan Monnier
+
+;; Author: Stephen Berman <stephen.berman@gmx.net>
+;;         Stefan Monnier <monnier@iro.umontreal.ca>
+;; Version: 0.1
+
+;; This program 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 of the License, or
+;; (at your option) any later version.
+
+;; This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This package provides the `adaptive-wrap-prefix-mode' minor mode which sets
+;; the wrap-prefix property on the fly so that single-long-line paragraphs get
+;; word-wrapped in a way similar to what you'd get with M-q using
+;; adaptive-fill-mode, but without actually changing the buffer's text.
+
+;;; Code:
+
+(defun adaptive-wrap-prefix-function (beg end)
+  "Indent the region between BEG and END with adaptive filling."
+  (goto-char beg)
+  (while (< (point) end)
+    (let ((blp (line-beginning-position)))
+      (put-text-property (point)
+                         (progn (search-forward "\n" end 'move) (point))
+                         'wrap-prefix
+                         (fill-context-prefix blp (point))))))
+
+;;;###autoload
+(define-minor-mode adaptive-wrap-prefix-mode
+  "Wrap the buffer text with adaptive filling."
+  :lighter ""
+  (if adaptive-wrap-prefix-mode
+      (jit-lock-register #'adaptive-wrap-prefix-function)
+    (jit-lock-unregister #'adaptive-wrap-prefix-function)
+    (with-silent-modifications
+      (save-restriction
+        (widen)
+        (remove-text-properties (point-min) (point-max) '(wrap-prefix nil))))))
+
+
+(provide 'adaptive-wrap)
+;;; adaptive-wrap.el ends here