Mercurial > hg > xemacs-beta

comparison lisp/modes/cc-compat.el @ 0:376386a54a3c r19-14

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
parents
children b82b59fe008d
comparison
equal deleted inserted replaced
-1:000000000000 0:376386a54a3c
1 ;;; cc-compat.el --- cc-mode compatibility with c-mode.el confusion
2
3 ;; Copyright (C) 1985-1995 Free Software Foundation, Inc.
4
5 ;; Author: 1994-1995 Barry A. Warsaw
6 ;; Maintainer: cc-mode-help@merlin.cnri.reston.va.us
7 ;; Created: August 1994, split from cc-mode.el
8 ;; Version: 1.5
9 ;; Last Modified: 1995/06/11 20:15:44
10 ;; Keywords: c languages oop
11
12 ;; This file is part of GNU Emacs.
13
14 ;; GNU Emacs is free software; you can redistribute it and/or modify
15 ;; it under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; any later version.
18
19 ;; GNU Emacs is distributed in the hope that it will be useful,
20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ;; GNU General Public License for more details.
23
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with GNU Emacs; see the file COPYING. If not, write to
26 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27
28 ;;; Synched up with: FSF 19.30.
29
30 ;;; Commentary:
31 ;;
32 ;; Boring old c-mode.el (BOCM) is confusion and brain melt. cc-mode.el
33 ;; is clarity of thought and purity of chi. If you are still unwilling
34 ;; to accept enlightenment, this might help, or it may prolong your
35 ;; agony.
36 ;;
37 ;; To use, add the following to your c-mode-hook:
38 ;;
39 ;; (require 'cc-compat)
40 ;; (c-set-style "BOCM")
41
42 ;;; Code:
43
44
45 ;; In case c-mode.el isn't loaded
46 (defvar c-indent-level 2
47 "*Indentation of C statements with respect to containing block.")
48 (defvar c-brace-imaginary-offset 0
49 "*Imagined indentation of a C open brace that actually follows a statement.")
50 (defvar c-brace-offset 0
51 "*Extra indentation for braces, compared with other text in same context.")
52 (defvar c-argdecl-indent 5
53 "*Indentation level of declarations of C function arguments.")
54 (defvar c-label-offset -2
55 "*Offset of C label lines and case statements relative to usual indentation.")
56 (defvar c-continued-statement-offset 2
57 "*Extra indent for lines not starting new statements.")
58 (defvar c-continued-brace-offset 0
59 "*Extra indent for substatements that start with open-braces.
60 This is in addition to c-continued-statement-offset.")
61
62
63
64 ;; these offsets are taken by brute force testing c-mode.el, since
65 ;; there's no logic to what it does.
66 (let* ((offsets '(c-offsets-alist .
67 ((defun-block-intro . cc-block-intro-offset)
68 (statement-block-intro . cc-block-intro-offset)
69 (defun-open . 0)
70 (class-open . 0)
71 (inline-open . c-brace-offset)
72 (block-open . c-brace-offset)
73 (block-close . cc-block-close-offset)
74 (brace-list-open . c-brace-offset)
75 (substatement-open . cc-substatement-open-offset)
76 (substatement . c-continued-statement-offset)
77 (knr-argdecl-intro . c-argdecl-indent)
78 (case-label . c-label-offset)
79 (access-label . c-label-offset)
80 (label . c-label-offset)
81 ))))
82 (c-add-style "BOCM" offsets))
83
84
85 (defun cc-block-intro-offset (langelem)
86 ;; taken directly from calculate-c-indent confusion
87 (save-excursion
88 (c-backward-syntactic-ws)
89 (if (= (preceding-char) ?{)
90 (forward-char -1)
91 (goto-char (cdr langelem)))
92 (let* ((curcol (save-excursion
93 (goto-char (cdr langelem))
94 (current-column)))
95 (bocm-lossage
96 ;; If no previous statement, indent it relative to line
97 ;; brace is on. For open brace in column zero, don't let
98 ;; statement start there too. If c-indent-level is zero,
99 ;; use c-brace-offset + c-continued-statement-offset
100 ;; instead. For open-braces not the first thing in a line,
101 ;; add in c-brace-imaginary-offset.
102 (+ (if (and (bolp) (zerop c-indent-level))
103 (+ c-brace-offset c-continued-statement-offset)
104 c-indent-level)
105 ;; Move back over whitespace before the openbrace. If
106 ;; openbrace is not first nonwhite thing on the line,
107 ;; add the c-brace-imaginary-offset.
108 (progn (skip-chars-backward " \t")
109 (if (bolp) 0 c-brace-imaginary-offset))
110 ;; If the openbrace is preceded by a parenthesized exp,
111 ;; move to the beginning of that; possibly a different
112 ;; line
113 (progn
114 (if (eq (preceding-char) ?\))
115 (forward-sexp -1))
116 ;; Get initial indentation of the line we are on.
117 (current-indentation)))))
118 (- bocm-lossage curcol))))
119
120
121 (defun cc-block-close-offset (langelem)
122 (save-excursion
123 (let* ((here (point))
124 bracep
125 (curcol (progn
126 (goto-char (cdr langelem))
127 (current-column)))
128 (bocm-lossage (progn
129 (goto-char (cdr langelem))
130 (if (= (following-char) ?{)
131 (setq bracep t)
132 (goto-char here)
133 (beginning-of-line)
134 (backward-up-list 1)
135 (forward-char 1)
136 (c-forward-syntactic-ws))
137 (current-column))))
138 (- bocm-lossage curcol
139 (if bracep 0 c-indent-level)))))
140
141
142 (defun cc-substatement-open-offset (langelem)
143 (+ c-continued-statement-offset c-continued-brace-offset))
144
145
146 (provide 'cc-compat)
147 ;;; cc-compat.el ends here