1 ;; Decorate a shell buffer with fonts.
2 ;; Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
4 ;; This file is part of XEmacs.
6 ;; XEmacs is free software; you can redistribute it and/or modify it
7 ;; under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 2, or (at your option)
11 ;; XEmacs is distributed in the hope that it will be useful, but
12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ;; General Public License for more details.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with XEmacs; see the file COPYING. If not, write to the
18 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 ;; Boston, MA 02111-1307, USA.
21 ;;; Synched up with: Not in FSF.
23 ;; Do this: (add-hook 'shell-mode-hook 'install-shell-fonts)
24 ;; and the prompt in your shell-buffers will appear bold-italic, process
25 ;; output will appear in normal face, and typein will appear in bold.
27 ;; The faces shell-prompt, shell-input and shell-output can be modified
28 ;; as desired, for example, (copy-face 'italic 'shell-prompt).
30 ;; Written by Jamie Zawinski, overhauled by Eric Benson.
34 ;; Parse ANSI/VT100 escape sequences to turn on underlining/boldface/etc.
35 ;; Automatically run nuke-nroff-bs?
38 (require 'text-props) ; for put-nonduplicable-text-property
40 (make-face 'shell-prompt)
41 (if (not (face-differs-from-default-p 'shell-prompt))
42 (copy-face 'bold-italic 'shell-prompt))
44 (make-face 'shell-input)
45 (if (not (face-differs-from-default-p 'shell-input))
46 (copy-face 'bold 'shell-input))
48 (make-face 'shell-output)
49 (if (not (face-differs-from-default-p 'shell-output))
50 (progn (make-face-unbold 'shell-output)
51 (make-face-unitalic 'shell-output)
52 (set-face-underline-p 'shell-output nil)))
54 (defvar shell-font-read-only-prompt nil
55 "*Set all shell prompts to be read-only")
57 (defvar shell-font-current-face 'shell-input)
59 (defun shell-font-fontify-region (start end delete-count)
60 ;; for use as an element of after-change-functions; fontifies the inserted text.
63 ; ;; This creates lots of extents (one per user-typed character)
64 ; ;; which is wasteful of memory.
65 ; (let ((e (make-extent start end)))
66 ; (set-extent-face e shell-font-current-face)
67 ; (set-extent-property e 'shell-font t))
69 ;; This efficiently merges extents
70 (put-nonduplicable-text-property start end 'face shell-font-current-face)
71 (and shell-font-read-only-prompt
72 (eq shell-font-current-face 'shell-prompt)
73 (put-nonduplicable-text-property start end 'read-only t))
76 (defun shell-font-hack-prompt (limit)
77 "Search backward from point-max for text matching the comint-prompt-regexp,
78 and put it in the `shell-prompt' face. LIMIT is the left bound of the search."
80 (goto-char (point-max))
82 (cond ((re-search-backward comint-prompt-regexp limit t)
83 (goto-char (match-end 0))
84 (cond ((= (point) (point-max))
85 (skip-chars-backward " \t")
86 (let ((shell-font-current-face 'shell-prompt))
87 (shell-font-fontify-region
88 (match-beginning 0) (point) 0)))))))))
90 ;; David Hughes 22nd April 1998
91 (defun shell-font-hack-input (string)
94 (goto-char (- (point-max) (length (replace-in-string string "\^M" ""))))
95 (skip-chars-forward " \t")
97 (end (save-excursion (re-search-forward "\n" nil t)))
98 (shell-font-current-face 'shell-input))
101 (looking-at comint-prompt-regexp)
102 (re-search-forward comint-prompt-regexp)
104 (shell-font-fontify-region beg end 0))))))
106 (defvar shell-font-process-filter nil
107 "In an interaction buffer with shell-font, this is the original proc filter.
108 shell-font encapsulates this.")
110 (defun shell-font-process-filter (proc string)
111 "Invoke the original process filter, then set fonts on the output.
112 The original filter is in the buffer-local variable shell-font-process-filter."
113 (let ((cb (current-buffer))
114 (pb (process-buffer proc)))
116 ;; If the proc has no buffer, leave it alone.
117 (funcall shell-font-process-filter proc string)
118 ;; Don't do save excursion because some proc filters want to change
119 ;; the buffer's point.
121 (let ((p (marker-position (process-mark proc))))
123 ;; this let must not be around the `set-buffer' call.
124 (let ((shell-font-current-face 'shell-output))
125 (funcall shell-font-process-filter proc string))
126 (shell-font-hack-prompt p)
127 ;; David Hughes 22nd April 1998
128 (if comint-process-echoes (shell-font-hack-input string))
132 (defun install-shell-fonts ()
133 "Decorate the current interaction buffer with fonts.
134 This uses the faces called `shell-prompt', `shell-input' and `shell-output';
135 you can alter the graphical attributes of those with the normal
136 face-manipulation functions."
137 (let* ((proc (or (get-buffer-process (current-buffer))
138 (error "no process in %S" (current-buffer))))
139 (old (or (process-filter proc)
140 (error "no process filter on %S" proc))))
141 (make-local-variable 'after-change-functions)
142 (add-hook 'after-change-functions 'shell-font-fontify-region)
143 (make-local-variable 'shell-font-current-face)
144 (setq shell-font-current-face 'shell-input)
145 (make-local-variable 'shell-font-process-filter)
146 (or (eq old 'shell-font-process-filter) ; already set
147 (setq shell-font-process-filter old))
148 (set-process-filter proc 'shell-font-process-filter))
151 (add-hook 'shell-mode-hook 'install-shell-fonts)
152 (add-hook 'telnet-mode-hook 'install-shell-fonts)
153 (add-hook 'gdb-mode-hook 'install-shell-fonts)
155 ;; for compatibility with the 19.8 version
156 ;(fset 'install-shell-font-prompt 'install-shell-fonts)
157 (make-obsolete 'install-shell-font-prompt 'install-shell-fonts)
159 (provide 'shell-font)
161 ;;; shell-font.el ends here