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- ;;; cc-align.el --- custom indentation functions for CC Mode
-
- ;; Copyright (C) 1985,87,92,93,94,95,96,97,98 Free Software Foundation, Inc.
-
- ;; Authors: 1992-1997 Barry A. Warsaw
- ;; 1987 Dave Detlefs and Stewart Clamen
- ;; 1985 Richard M. Stallman
- ;; Maintainer: cc-mode-help@python.org
- ;; Created: 22-Apr-1997 (split from cc-mode.el)
- ;; Version: See cc-mode.el
- ;; Keywords: c languages oop
-
- ;; 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.
-
- (eval-when-compile
- (require 'cc-defs)
- (require 'cc-vars)
- (require 'cc-engine)
- (require 'cc-langs))
-
-
- ;; Standard indentation line-ups
- (defun c-lineup-arglist (langelem)
- ;; lineup the current arglist line with the arglist appearing just
- ;; after the containing paren which starts the arglist.
- (save-excursion
- (let* ((containing-sexp
- (save-excursion
- ;; arglist-cont-nonempty gives relpos ==
- ;; to boi of containing-sexp paren. This
- ;; is good when offset is +, but bad
- ;; when it is c-lineup-arglist, so we
- ;; have to special case a kludge here.
- (if (memq (car langelem) '(arglist-intro arglist-cont-nonempty))
- (progn
- (beginning-of-line)
- (backward-up-list 1)
- (skip-chars-forward " \t" (c-point 'eol)))
- (goto-char (cdr langelem)))
- (point)))
- (langelem-col (c-langelem-col langelem t)))
- (if (save-excursion
- (beginning-of-line)
- (looking-at "[ \t]*)"))
- (progn (goto-char (match-end 0))
- (forward-sexp -1)
- (forward-char 1)
- (c-forward-syntactic-ws)
- (- (current-column) langelem-col))
- (goto-char containing-sexp)
- (or (eolp)
- (not (memq (char-after) '(?{ ?\( )))
- (let ((eol (c-point 'eol))
- (here (progn
- (forward-char 1)
- (skip-chars-forward " \t")
- (point))))
- (c-forward-syntactic-ws)
- (if (< (point) eol)
- (goto-char here))))
- (- (current-column) langelem-col)
- ))))
-
- (defun c-lineup-arglist-intro-after-paren (langelem)
- ;; lineup an arglist-intro line to just after the open paren
- (save-excursion
- (let ((langelem-col (c-langelem-col langelem t))
- (ce-curcol (save-excursion
- (beginning-of-line)
- (backward-up-list 1)
- (skip-chars-forward " \t" (c-point 'eol))
- (current-column))))
- (- ce-curcol langelem-col -1))))
-
- (defun c-lineup-arglist-close-under-paren (langelem)
- ;; lineup an arglist-close line under the corresponding open paren
- (save-excursion
- (let ((langelem-col (c-langelem-col langelem t))
- (ce-curcol (save-excursion
- (beginning-of-line)
- (backward-up-list 1)
- (current-column))))
- (- ce-curcol langelem-col))))
-
- (defun c-lineup-close-paren (langelem)
- ;; Indents the closing paren under its corresponding open paren if
- ;; the open paren is followed by code. If the open paren ends its
- ;; line, no indentation is added. E.g:
- ;;
- ;; main (int, main (
- ;; char ** int, char **
- ;; ) <-> ) <- c-lineup-close-paren
- ;;
- ;; Works with any type of paren.
- (save-excursion
- (condition-case nil
- (let (opencol spec)
- (beginning-of-line)
- (backward-up-list 1)
- (setq spec (if (fboundp 'c-looking-at-special-brace-list)
- (c-looking-at-special-brace-list)))
- (if spec (goto-char (car spec)))
- (setq opencol (current-column))
- (forward-char 1)
- (if spec (progn
- (c-forward-syntactic-ws)
- (forward-char 1)))
- (c-forward-syntactic-ws (c-point 'eol))
- (if (eolp)
- 0
- (- opencol (c-langelem-col langelem t))))
- (error 0))))
-
- (defun c-lineup-streamop (langelem)
- ;; lineup stream operators
- (save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (re-search-forward "<<\\|>>" (c-point 'eol) 'move)
- (goto-char (match-beginning 0))
- (- (current-column) langelem-col))))
-
- (defun c-lineup-multi-inher (langelem)
- ;; line up multiple inheritance lines
- (save-excursion
- (let ((eol (c-point 'eol))
- (here (point))
- (langelem-col (c-langelem-col langelem)))
- (skip-chars-forward "^:" eol)
- (skip-chars-forward " \t:" eol)
- (if (or (eolp)
- (looking-at c-comment-start-regexp))
- (c-forward-syntactic-ws here))
- (- (current-column) langelem-col)
- )))
-
- (defun c-lineup-java-inher (langelem)
- ;; line up Java implements and extends continuations
- (save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (forward-word 1)
- (if (looking-at "[ \t]*$")
- langelem-col
- (c-forward-syntactic-ws)
- (- (current-column) langelem-col)))))
-
- (defun c-lineup-java-throws (langelem)
- ;; lineup func-decl-cont's in Java which are continuations of throws
- ;; declarations. If `throws' starts the previous line, line up to
- ;; just after that keyword. If not, lineup under the previous line.
- (save-excursion
- (let ((iopl (c-point 'iopl))
- (langelem-col (c-langelem-col langelem t))
- (extra 0))
- (back-to-indentation)
- (cond
- ((looking-at "throws[ \t\n]")
- (goto-char (cdr langelem))
- (setq extra c-basic-offset))
- ((and (goto-char iopl)
- (looking-at "throws[ \t\n]"))
- (forward-word 1)
- (skip-chars-forward " \t")
- (if (eolp)
- (progn
- (back-to-indentation)
- (setq extra c-basic-offset))))
- (t (goto-char iopl)))
- (+ (- (current-column) langelem-col) extra))))
-
- (defun c-indent-one-line-block (langelem)
- ;; Adds c-basic-offset to the indentation if the line is a one line
- ;; block, otherwise 0. E.g:
- ;;
- ;; if (n) if (n)
- ;; {m+=n; n=0;} <-> { <- c-indent-one-line-block
- ;; m+=n; n=0;
- ;; }
- (save-excursion
- (let ((eol (progn (end-of-line) (point))))
- (beginning-of-line)
- (skip-chars-forward " \t")
- (if (and (eq (following-char) ?{)
- (condition-case nil
- (progn (forward-sexp) t)
- (error nil))
- (<= (point) eol)
- (eq (preceding-char) ?}))
- c-basic-offset
- 0))))
-
- (defun c-lineup-C-comments (langelem)
- ;; line up C block comment continuation lines
- (save-excursion
- (let ((here (point))
- (stars (progn (back-to-indentation)
- (skip-chars-forward "*")))
- (langelem-col (c-langelem-col langelem)))
- (back-to-indentation)
- (if (not (re-search-forward "/\\([*]+\\)" (c-point 'eol) t))
- (progn
- (if (not (looking-at "[*]+"))
- (progn
- ;; we now have to figure out where this comment begins.
- (goto-char here)
- (back-to-indentation)
- (if (looking-at "[*]+/")
- (progn (goto-char (match-end 0))
- (forward-comment -1))
- (goto-char (cdr langelem))
- (back-to-indentation))))
- (- (current-column) langelem-col))
- (if (zerop stars)
- (progn
- (skip-chars-forward " \t")
- (- (current-column) langelem-col))
- ;; how many stars on comment opening line? if greater than
- ;; on current line, align left. if less than or equal,
- ;; align right. this should also pick up Javadoc style
- ;; comments.
- (if (> (length (match-string 1)) stars)
- (progn
- (back-to-indentation)
- (- (current-column) -1 langelem-col))
- (- (current-column) stars langelem-col))
- )))))
-
- (defun c-lineup-comment (langelem)
- ;; support old behavior for comment indentation. we look at
- ;; c-comment-only-line-offset to decide how to indent comment
- ;; only-lines
- (save-excursion
- (back-to-indentation)
- ;; this highly kludgiforous flag prevents the mapcar over
- ;; c-syntactic-context from entering an infinite loop
- (let ((recurse-prevention-flag (boundp 'recurse-prevention-flag)))
- (cond
- ;; CASE 1: preserve comment-column
- (recurse-prevention-flag 0)
- ((= (current-column) comment-column)
- ;; we have to subtract out all other indentation
- (- comment-column (apply '+ (mapcar 'c-get-offset
- c-syntactic-context))))
- ;; indent as specified by c-comment-only-line-offset
- ((not (bolp))
- (or (car-safe c-comment-only-line-offset)
- c-comment-only-line-offset))
- (t
- (or (cdr-safe c-comment-only-line-offset)
- (car-safe c-comment-only-line-offset)
- -1000)) ;jam it against the left side
- ))))
-
- (defun c-lineup-runin-statements (langelem)
- ;; line up statements in coding standards which place the first
- ;; statement on the same line as the block opening brace.
- (if (eq (char-after (cdr langelem)) ?{)
- (save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (forward-char 1)
- (skip-chars-forward " \t")
- (- (current-column) langelem-col)))
- 0))
-
- (defun c-lineup-math (langelem)
- ;; line up math statement-cont after the equals
- (save-excursion
- (let ((equalp (save-excursion
- (goto-char (c-point 'boi))
- (skip-chars-forward "^=" (c-point 'eol))
- (and (eq (char-after) ?=)
- (- (point) (c-point 'boi)))))
- (langelem-col (c-langelem-col langelem))
- donep)
- (while (and (not donep)
- (< (point) (c-point 'eol)))
- (skip-chars-forward "^=" (c-point 'eol))
- (if (c-in-literal (cdr langelem))
- (forward-char 1)
- (setq donep t)))
- (if (not (eq (char-after) ?=))
- ;; there's no equal sign on the line
- c-basic-offset
- ;; calculate indentation column after equals and ws, unless
- ;; our line contains an equals sign
- (if (not equalp)
- (progn
- (forward-char 1)
- (skip-chars-forward " \t")
- (setq equalp 0)))
- (- (current-column) equalp langelem-col))
- )))
-
- (defun c-lineup-ObjC-method-call (langelem)
- ;; Line up methods args as elisp-mode does with function args: go to
- ;; the position right after the message receiver, and if you are at
- ;; (eolp) indent the current line by a constant offset from the
- ;; opening bracket; otherwise we are looking at the first character
- ;; of the first method call argument, so lineup the current line
- ;; with it.
- (save-excursion
- (let* ((extra (save-excursion
- (back-to-indentation)
- (c-backward-syntactic-ws (cdr langelem))
- (if (eq (char-before) ?:)
- (- c-basic-offset)
- 0)))
- (open-bracket-pos (cdr langelem))
- (open-bracket-col (progn
- (goto-char open-bracket-pos)
- (current-column)))
- (target-col (progn
- (forward-char)
- (forward-sexp)
- (skip-chars-forward " \t")
- (if (eolp)
- (+ open-bracket-col c-basic-offset)
- (current-column))))
- )
- (- target-col open-bracket-col extra))))
-
- (defun c-lineup-ObjC-method-args (langelem)
- ;; Line up the colons that separate args. This is done trying to
- ;; align colons vertically.
- (save-excursion
- (let* ((here (c-point 'boi))
- (curcol (progn (goto-char here) (current-column)))
- (eol (c-point 'eol))
- (relpos (cdr langelem))
- (first-col-column (progn
- (goto-char relpos)
- (skip-chars-forward "^:" eol)
- (and (eq (char-after) ?:)
- (current-column)))))
- (if (not first-col-column)
- c-basic-offset
- (goto-char here)
- (skip-chars-forward "^:" eol)
- (if (eq (char-after) ?:)
- (+ curcol (- first-col-column (current-column)))
- c-basic-offset)))))
-
- (defun c-lineup-ObjC-method-args-2 (langelem)
- ;; Line up the colons that separate args. This is done trying to
- ;; align the colon on the current line with the previous one.
- (save-excursion
- (let* ((here (c-point 'boi))
- (curcol (progn (goto-char here) (current-column)))
- (eol (c-point 'eol))
- (relpos (cdr langelem))
- (prev-col-column (progn
- (skip-chars-backward "^:" relpos)
- (and (eq (char-before) ?:)
- (- (current-column) 1)))))
- (if (not prev-col-column)
- c-basic-offset
- (goto-char here)
- (skip-chars-forward "^:" eol)
- (if (eq (char-after) ?:)
- (+ curcol (- prev-col-column (current-column)))
- c-basic-offset)))))
-
- (defun c-lineup-dont-change (langelem)
- ;; Do not change the indentation of the current line
- (save-excursion
- (back-to-indentation)
- (current-column)))
-
-
-
- (defun c-snug-do-while (syntax pos)
- "Dynamically calculate brace hanginess for do-while statements.
- Using this function, `while' clauses that end a `do-while' block will
- remain on the same line as the brace that closes that block.
-
- See `c-hanging-braces-alist' for how to utilize this function as an
- ACTION associated with `block-close' syntax."
- (save-excursion
- (let (langelem)
- (if (and (eq syntax 'block-close)
- (setq langelem (assq 'block-close c-syntactic-context))
- (progn (goto-char (cdr langelem))
- (if (eq (char-after) ?{)
- (c-safe (forward-sexp -1)))
- (looking-at "\\<do\\>[^_]")))
- '(before)
- '(before after)))))
-
- (defun c-gnu-impose-minimum ()
- "Imposes a minimum indentation for lines inside a top-level construct.
- The variable `c-label-minimum-indentation' specifies the minimum
- indentation amount."
- (let ((non-top-levels '(defun-block-intro statement statement-cont
- statement-block-intro statement-case-intro
- statement-case-open substatement substatement-open
- case-label label do-while-closure else-clause
- ))
- (syntax c-syntactic-context)
- langelem)
- (while syntax
- (setq langelem (car (car syntax))
- syntax (cdr syntax))
- ;; don't adjust comment-only lines
- (cond ((eq langelem 'comment-intro)
- (setq syntax nil))
- ((memq langelem non-top-levels)
- (save-excursion
- (setq syntax nil)
- (back-to-indentation)
- (if (zerop (current-column))
- (insert (make-string c-label-minimum-indentation 32)))
- ))
- ))))
-
-
- ;; Useful for c-hanging-semi&comma-criteria
- (defun c-semi&comma-inside-parenlist ()
- "Controls newline insertion after semicolons in parenthesis lists.
- If a comma was inserted, no determination is made. If a semicolon was
- inserted inside a parenthesis list, no newline is added otherwise a
- newline is added. In either case, checking is stopped. This supports
- exactly the old newline insertion behavior."
- ;; newline only after semicolon, but only if that semicolon is not
- ;; inside a parenthesis list (e.g. a for loop statement)
- (if (not (eq last-command-char ?\;))
- nil ; continue checking
- (if (condition-case nil
- (save-excursion
- (up-list -1)
- (not (eq (char-after) ?\()))
- (error t))
- t
- 'stop)))
-
- ;; Suppresses newlines before non-blank lines
- (defun c-semi&comma-no-newlines-before-nonblanks ()
- "Controls newline insertion after semicolons.
- If a comma was inserted, no determination is made. If a semicolon was
- inserted, and the following line is not blank, no newline is inserted.
- Otherwise, no determination is made."
- (save-excursion
- (if (and (= last-command-char ?\;)
- ;;(/= (point-max)
- ;; (save-excursion (skip-syntax-forward " ") (point))
- (zerop (forward-line 1))
- (not (looking-at "^[ \t]*$")))
- 'stop
- nil)))
-
- ;; Suppresses new lines after semicolons in one-liners methods
- (defun c-semi&comma-no-newlines-for-oneline-inliners ()
- "Controls newline insertion after semicolons for some one-line methods.
- If a comma was inserted, no determination is made. Newlines are
- suppressed in one-liners, if the line is an in-class inline function.
- For other semicolon contexts, no determination is made."
- (let ((syntax (c-guess-basic-syntax))
- (bol (save-excursion
- (if (c-safe (up-list -1) t)
- (c-point 'bol)
- -1))))
- (if (and (eq last-command-char ?\;)
- (eq (car (car syntax)) 'inclass)
- (eq (car (car (cdr syntax))) 'topmost-intro)
- (= (c-point 'bol) bol))
- 'stop
- nil)))
-
-
- (provide 'cc-align)
- ;;; cc-align.el ends here
-