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2929 linhas
119 KiB
2929 linhas
119 KiB
;;; paredit.el --- minor mode for editing parentheses -*- Mode: Emacs-Lisp -*-
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;; Copyright (C) 2005--2017 Taylor R. Campbell
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;; Author: Taylor R. Campbell <campbell+paredit@mumble.net>
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;; Version: 25beta
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;; Package-Version: 20171127.205
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;; Created: 2005-07-31
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;; Keywords: lisp
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;; NOTE: THIS IS A BETA VERSION OF PAREDIT. USE AT YOUR OWN RISK.
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;; THIS FILE IS SUBJECT TO CHANGE, AND NOT SUITABLE FOR DISTRIBUTION
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;; BY PACKAGE MANAGERS SUCH AS APT, PKGSRC, MACPORTS, &C.
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;; Paredit is free software: you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; Paredit is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with paredit. If not, see <http://www.gnu.org/licenses/>.
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;;; The currently released version of paredit is available at
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;;; <https://mumble.net/~campbell/emacs/paredit.el>.
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;;;
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;;; The latest beta version of paredit is available at
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;;; <https://mumble.net/~campbell/emacs/paredit-beta.el>.
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;;;
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;;; The Git repository for paredit is available at
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;;; <https://mumble.net/~campbell/git/paredit.git>
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;;;
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;;; Release notes are available at
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;;; <https://mumble.net/~campbell/emacs/paredit.release>.
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;;; Install paredit by placing `paredit.el' in `/path/to/elisp', a
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;;; directory of your choice, and adding to your .emacs file:
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;;;
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;;; (add-to-list 'load-path "/path/to/elisp")
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;;; (autoload 'enable-paredit-mode "paredit"
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;;; "Turn on pseudo-structural editing of Lisp code."
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;;; t)
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;;;
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;;; Start Paredit Mode on the fly with `M-x enable-paredit-mode RET',
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;;; or always enable it in a major mode `M' (e.g., `lisp') with:
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;;;
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;;; (add-hook 'M-mode-hook 'enable-paredit-mode)
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;;;
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;;; Customize paredit using `eval-after-load':
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;;;
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;;; (eval-after-load 'paredit
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;;; '(progn
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;;; (define-key paredit-mode-map (kbd "ESC M-A-C-s-)")
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;;; 'paredit-dwim)))
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;;;
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;;; Send questions, bug reports, comments, feature suggestions, &c.,
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;;; via email to the author's surname at mumble.net.
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;;;
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;;; Paredit should run in GNU Emacs 21 or later and XEmacs 21.5.28 or
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;;; later.
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;;; The paredit minor mode, Paredit Mode, binds common character keys,
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;;; such as `(', `)', `"', and `\', to commands that carefully insert
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;;; S-expression structures in the buffer:
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;;;
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;;; ( inserts `()', leaving the point in the middle;
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;;; ) moves the point over the next closing delimiter;
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;;; " inserts `""' if outside a string, or inserts an escaped
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;;; double-quote if in the middle of a string, or moves over the
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;;; closing double-quote if at the end of a string; and
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;;; \ prompts for the character to escape, to avoid inserting lone
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;;; backslashes that may break structure.
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;;;
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;;; In comments, these keys insert themselves. If necessary, you can
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;;; insert these characters literally outside comments by pressing
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;;; `C-q' before these keys, in case a mistake has broken the
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;;; structure.
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;;;
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;;; These key bindings are designed so that when typing new code in
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;;; Paredit Mode, you can generally type exactly the same sequence of
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;;; keys you would have typed without Paredit Mode.
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;;;
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;;; Paredit Mode also binds common editing keys, such as `DEL', `C-d',
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;;; and `C-k', to commands that respect S-expression structures in the
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;;; buffer:
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;;;
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;;; DEL deletes the previous character, unless it is a delimiter: DEL
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;;; will move the point backward over a closing delimiter, and
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;;; will delete a delimiter pair together if between an open and
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;;; closing delimiter;
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;;;
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;;; C-d deletes the next character in much the same manner; and
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;;;
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;;; C-k kills all S-expressions that begin anywhere between the point
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;;; and the end of the line or the closing delimiter of the
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;;; enclosing list, whichever is first.
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;;;
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;;; If necessary, you can delete a character, kill a line, &c.,
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;;; irrespective of S-expression structure, by pressing `C-u' before
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;;; these keys, in case a mistake has broken the structure.
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;;;
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;;; Finally, Paredit Mode binds some keys to complex S-expression
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;;; editing operations. For example, `C-<right>' makes the enclosing
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;;; list slurp up an S-expression to its right (here `|' denotes the
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;;; point):
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;;;
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;;; (foo (bar | baz) quux) C-<right> (foo (bar | baz quux))
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;;;
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;;; Some paredit commands automatically reindent code. When they do,
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;;; they try to indent as locally as possible, to avoid interfering
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;;; with any indentation you might have manually written. Only the
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;;; advanced S-expression manipulation commands automatically reindent,
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;;; and only the forms that they immediately operated upon (and their
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;;; subforms).
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;;;
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;;; This code is written for clarity, not efficiency. It frequently
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;;; walks over S-expressions redundantly. If you have problems with
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;;; the time it takes to execute some of the commands, let me know.
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;;; This assumes Unix-style LF line endings.
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(defconst paredit-version 25)
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(defconst paredit-beta-p t)
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(eval-and-compile
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(defun paredit-xemacs-p ()
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;; No idea where I got this definition from. Edward O'Connor
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;; (hober in #emacs) suggested the current definition.
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;; (and (boundp 'running-xemacs)
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;; running-xemacs)
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(featurep 'xemacs))
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(defun paredit-gnu-emacs-p ()
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;++ This could probably be improved.
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(not (paredit-xemacs-p)))
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(defmacro xcond (&rest clauses)
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"Exhaustive COND.
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Signal an error if no clause matches."
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`(cond ,@clauses
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(t (error "XCOND lost."))))
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(defalias 'paredit-warn (if (fboundp 'warn) 'warn 'message))
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(defvar paredit-sexp-error-type
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(with-temp-buffer
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(insert "(")
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(condition-case condition
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(backward-sexp)
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(error (if (eq (car condition) 'error)
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(paredit-warn "%s%s%s%s%s"
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"Paredit is unable to discriminate"
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" S-expression parse errors from"
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" other errors. "
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" This may cause obscure problems. "
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" Please upgrade Emacs."))
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(car condition)))))
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(defmacro paredit-handle-sexp-errors (body &rest handler)
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`(condition-case ()
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,body
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(,paredit-sexp-error-type ,@handler)))
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(put 'paredit-handle-sexp-errors 'lisp-indent-function 1)
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(defmacro paredit-ignore-sexp-errors (&rest body)
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`(paredit-handle-sexp-errors (progn ,@body)
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nil))
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(put 'paredit-ignore-sexp-errors 'lisp-indent-function 0)
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(defmacro paredit-preserving-column (&rest body)
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"Evaluate BODY and restore point to former column, relative to code.
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Assumes BODY will change only indentation.
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If point was on code, it moves with the code.
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If point was on indentation, it stays in indentation."
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(let ((column (make-symbol "column"))
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(indentation (make-symbol "indentation")))
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`(let ((,column (current-column))
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(,indentation (paredit-current-indentation)))
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(let ((value (progn ,@body)))
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(paredit-restore-column ,column ,indentation)
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value))))
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(put 'paredit-preserving-column 'lisp-indent-function 0)
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nil)
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;;;; Minor Mode Definition
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(defvar paredit-lighter " Paredit"
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"Mode line lighter Paredit Mode.")
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(defvar paredit-mode-map (make-sparse-keymap)
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"Keymap for the paredit minor mode.")
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(defvar paredit-override-check-parens-function
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(lambda (condition) condition nil)
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"Function to tell whether unbalanced text should inhibit Paredit Mode.")
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;;;###autoload
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(define-minor-mode paredit-mode
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"Minor mode for pseudo-structurally editing Lisp code.
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With a prefix argument, enable Paredit Mode even if there are
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unbalanced parentheses in the buffer.
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Paredit behaves badly if parentheses are unbalanced, so exercise
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caution when forcing Paredit Mode to be enabled, and consider
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fixing unbalanced parentheses instead.
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\\<paredit-mode-map>"
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:lighter paredit-lighter
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;; Setting `paredit-mode' to false here aborts enabling Paredit Mode.
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(if (and paredit-mode
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(not current-prefix-arg))
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(condition-case condition
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(check-parens)
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(error
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(if (not (funcall paredit-override-check-parens-function condition))
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(progn (setq paredit-mode nil)
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(signal (car condition) (cdr condition))))))))
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(defun paredit-override-check-parens-interactively (condition)
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(y-or-n-p (format "Enable Paredit Mode despite condition %S? " condition)))
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;;;###autoload
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(defun enable-paredit-mode ()
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"Turn on pseudo-structural editing of Lisp code."
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(interactive)
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(paredit-mode +1))
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(defun disable-paredit-mode ()
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"Turn off pseudo-structural editing of Lisp code."
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(interactive)
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(paredit-mode -1))
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(defvar paredit-backward-delete-key
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(xcond ((paredit-xemacs-p) "BS")
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((paredit-gnu-emacs-p) "DEL")))
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(defvar paredit-forward-delete-keys
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(xcond ((paredit-xemacs-p) '("DEL"))
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((paredit-gnu-emacs-p) '("<delete>" "<deletechar>"))))
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;;;; Paredit Keys
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;;; Separating the definition and initialization of this variable
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;;; simplifies the development of paredit, since re-evaluating DEFVAR
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;;; forms doesn't actually do anything.
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(defvar paredit-commands nil
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"List of paredit commands with their keys and examples.")
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;;; Each specifier is of the form:
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;;; (key[s] function (example-input example-output) ...)
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;;; where key[s] is either a single string suitable for passing to KBD
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;;; or a list of such strings. Entries in this list may also just be
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;;; strings, in which case they are headings for the next entries.
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(progn (setq paredit-commands
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`(
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"Basic Insertion Commands"
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("(" paredit-open-round
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("(a b |c d)"
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"(a b (|) c d)")
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("(foo \"bar |baz\" quux)"
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"(foo \"bar (|baz\" quux)"))
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(")" paredit-close-round
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("(a b |c )" "(a b c)|")
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("; Hello,| world!"
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"; Hello,)| world!"))
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("M-)" paredit-close-round-and-newline
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("(defun f (x| ))"
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"(defun f (x)\n |)")
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("; (Foo.|"
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"; (Foo.)|"))
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("[" paredit-open-square
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("(a b |c d)"
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"(a b [|] c d)")
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("(foo \"bar |baz\" quux)"
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"(foo \"bar [|baz\" quux)"))
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("]" paredit-close-square
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("(define-key keymap [frob| ] 'frobnicate)"
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"(define-key keymap [frob]| 'frobnicate)")
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("; [Bar.|"
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"; [Bar.]|"))
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("\"" paredit-doublequote
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("(frob grovel |full lexical)"
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"(frob grovel \"|\" full lexical)"
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"(frob grovel \"\"| full lexical)")
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("(foo \"bar |baz\" quux)"
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"(foo \"bar \\\"|baz\" quux)")
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("(frob grovel) ; full |lexical"
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"(frob grovel) ; full \"|lexical"))
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("M-\"" paredit-meta-doublequote
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("(foo \"bar |baz\" quux)"
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"(foo \"bar baz\"| quux)")
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("(foo |(bar #\\x \"baz \\\\ quux\") zot)"
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,(concat "(foo \"|(bar #\\\\x \\\"baz \\\\"
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"\\\\ quux\\\")\" zot)")))
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("\\" paredit-backslash
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("(string #|)\n ; Character to escape: x"
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"(string #\\x|)")
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("\"foo|bar\"\n ; Character to escape: \""
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"\"foo\\\"|bar\""))
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(";" paredit-semicolon
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("|(frob grovel)"
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";|(frob grovel)")
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("(frob |grovel)"
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"(frob ;|grovel\n )")
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("(frob |grovel (bloit\n zargh))"
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"(frob ;|grovel\n (bloit\n zargh))")
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("(frob grovel) |"
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"(frob grovel) ;|"))
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("M-;" paredit-comment-dwim
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("(foo |bar) ; baz"
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"(foo bar) ; |baz")
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("(frob grovel)|"
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"(frob grovel) ;|")
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("(zot (foo bar)\n|\n (baz quux))"
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"(zot (foo bar)\n ;; |\n (baz quux))")
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("(zot (foo bar) |(baz quux))"
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"(zot (foo bar)\n ;; |\n (baz quux))")
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("|(defun hello-world ...)"
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";;; |\n(defun hello-world ...)"))
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("C-j" paredit-newline
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("(let ((n (frobbotz))) |(display (+ n 1)\nport))"
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,(concat "(let ((n (frobbotz)))"
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"\n |(display (+ n 1)"
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"\n port))")))
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"Deleting & Killing"
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(("C-d" ,@paredit-forward-delete-keys)
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paredit-forward-delete
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("(quu|x \"zot\")" "(quu| \"zot\")")
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("(quux |\"zot\")"
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"(quux \"|zot\")"
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"(quux \"|ot\")")
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("(foo (|) bar)" "(foo | bar)")
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("|(foo bar)" "(|foo bar)"))
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(,paredit-backward-delete-key
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paredit-backward-delete
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("(\"zot\" q|uux)" "(\"zot\" |uux)")
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("(\"zot\"| quux)"
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"(\"zot|\" quux)"
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"(\"zo|\" quux)")
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("(foo (|) bar)" "(foo | bar)")
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("(foo bar)|" "(foo bar|)"))
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("C-k" paredit-kill
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("(foo bar)| ; Useless comment!"
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"(foo bar)|")
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("(|foo bar) ; Useful comment!"
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"(|) ; Useful comment!")
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("|(foo bar) ; Useless line!"
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"|")
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("(foo \"|bar baz\"\n quux)"
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"(foo \"|\"\n quux)"))
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("M-d" paredit-forward-kill-word
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("|(foo bar) ; baz"
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"(| bar) ; baz"
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"(|) ; baz"
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"() ;|")
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(";;;| Frobnicate\n(defun frobnicate ...)"
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";;;|\n(defun frobnicate ...)"
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";;;\n(| frobnicate ...)"))
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(,(concat "M-" paredit-backward-delete-key)
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paredit-backward-kill-word
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("(foo bar) ; baz\n(quux)|"
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"(foo bar) ; baz\n(|)"
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"(foo bar) ; |\n()"
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"(foo |) ; \n()"
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"(|) ; \n()"))
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"Movement & Navigation"
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("C-M-f" paredit-forward
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("(foo |(bar baz) quux)"
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"(foo (bar baz)| quux)")
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("(foo (bar)|)"
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"(foo (bar))|"))
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("C-M-b" paredit-backward
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("(foo (bar baz)| quux)"
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"(foo |(bar baz) quux)")
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("(|(foo) bar)"
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"|((foo) bar)"))
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("C-M-u" paredit-backward-up)
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("C-M-d" paredit-forward-down)
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("C-M-p" paredit-backward-down) ; Built-in, these are FORWARD-
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("C-M-n" paredit-forward-up) ; & BACKWARD-LIST, which have
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; no need given C-M-f & C-M-b.
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"Depth-Changing Commands"
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("M-(" paredit-wrap-round
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("(foo |bar baz)"
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"(foo (|bar) baz)"))
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("M-s" paredit-splice-sexp
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("(foo (bar| baz) quux)"
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"(foo bar| baz quux)"))
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(("M-<up>" "ESC <up>")
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paredit-splice-sexp-killing-backward
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("(foo (let ((x 5)) |(sqrt n)) bar)"
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"(foo |(sqrt n) bar)"))
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(("M-<down>" "ESC <down>")
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paredit-splice-sexp-killing-forward
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("(a (b c| d e) f)"
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"(a b c| f)"))
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("M-r" paredit-raise-sexp
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("(dynamic-wind in (lambda () |body) out)"
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"(dynamic-wind in |body out)"
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"|body"))
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("M-?" paredit-convolute-sexp
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("(let ((x 5) (y 3)) (frob |(zwonk)) (wibblethwop))"
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"(frob |(let ((x 5) (y 3)) (zwonk) (wibblethwop)))"))
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"Barfage & Slurpage"
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(("C-)" "C-<right>")
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paredit-forward-slurp-sexp
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("(foo (bar |baz) quux zot)"
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"(foo (bar |baz quux) zot)")
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("(a b ((c| d)) e f)"
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"(a b ((c| d) e) f)"))
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(("C-}" "C-<left>")
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paredit-forward-barf-sexp
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("(foo (bar |baz quux) zot)"
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"(foo (bar |baz) quux zot)"))
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(("C-(" "C-M-<left>" "ESC C-<left>")
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paredit-backward-slurp-sexp
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("(foo bar (baz| quux) zot)"
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"(foo (bar baz| quux) zot)")
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("(a b ((c| d)) e f)"
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"(a (b (c| d)) e f)"))
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(("C-{" "C-M-<right>" "ESC C-<right>")
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paredit-backward-barf-sexp
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("(foo (bar baz |quux) zot)"
|
|
"(foo bar (baz |quux) zot)"))
|
|
|
|
"Miscellaneous Commands"
|
|
("M-S" paredit-split-sexp
|
|
("(hello| world)"
|
|
"(hello)| (world)")
|
|
("\"Hello, |world!\""
|
|
"\"Hello, \"| \"world!\""))
|
|
("M-J" paredit-join-sexps
|
|
("(hello)| (world)"
|
|
"(hello| world)")
|
|
("\"Hello, \"| \"world!\""
|
|
"\"Hello, |world!\"")
|
|
("hello-\n| world"
|
|
"hello-|world"))
|
|
("C-c C-M-l" paredit-recenter-on-sexp)
|
|
("M-q" paredit-reindent-defun)
|
|
))
|
|
nil) ; end of PROGN
|
|
|
|
;;;;; Command Examples
|
|
|
|
(eval-and-compile
|
|
(defmacro paredit-do-commands (vars string-case &rest body)
|
|
(let ((spec (nth 0 vars))
|
|
(keys (nth 1 vars))
|
|
(fn (nth 2 vars))
|
|
(examples (nth 3 vars)))
|
|
`(dolist (,spec paredit-commands)
|
|
(if (stringp ,spec)
|
|
,string-case
|
|
(let ((,keys (let ((k (car ,spec)))
|
|
(cond ((stringp k) (list k))
|
|
((listp k) k)
|
|
(t (error "Invalid paredit command %s."
|
|
,spec)))))
|
|
(,fn (cadr ,spec))
|
|
(,examples (cddr ,spec)))
|
|
,@body)))))
|
|
|
|
(put 'paredit-do-commands 'lisp-indent-function 2))
|
|
|
|
(defun paredit-define-keys ()
|
|
(paredit-do-commands (spec keys fn examples)
|
|
nil ; string case
|
|
(dolist (key keys)
|
|
(define-key paredit-mode-map (read-kbd-macro key) fn))))
|
|
|
|
(defun paredit-function-documentation (fn)
|
|
(let ((original-doc (get fn 'paredit-original-documentation))
|
|
(doc (documentation fn 'function-documentation)))
|
|
(or original-doc
|
|
(progn (put fn 'paredit-original-documentation doc)
|
|
doc))))
|
|
|
|
(defun paredit-annotate-mode-with-examples ()
|
|
(let ((contents
|
|
(list (paredit-function-documentation 'paredit-mode))))
|
|
(paredit-do-commands (spec keys fn examples)
|
|
(push (concat "\n \n" spec "\n")
|
|
contents)
|
|
(let ((name (symbol-name fn)))
|
|
(if (string-match (symbol-name 'paredit-) name)
|
|
(push (concat "\n\n\\[" name "]\t" name
|
|
(if examples
|
|
(mapconcat (lambda (example)
|
|
(concat
|
|
"\n"
|
|
(mapconcat 'identity
|
|
example
|
|
"\n --->\n")
|
|
"\n"))
|
|
examples
|
|
"")
|
|
"\n (no examples)\n"))
|
|
contents))))
|
|
(put 'paredit-mode 'function-documentation
|
|
(apply 'concat (reverse contents))))
|
|
;; PUT returns the huge string we just constructed, which we don't
|
|
;; want it to return.
|
|
nil)
|
|
|
|
(defun paredit-annotate-functions-with-examples ()
|
|
(paredit-do-commands (spec keys fn examples)
|
|
nil ; string case
|
|
(put fn 'function-documentation
|
|
(concat (paredit-function-documentation fn)
|
|
"\n\n\\<paredit-mode-map>\\[" (symbol-name fn) "]\n"
|
|
(mapconcat (lambda (example)
|
|
(concat "\n"
|
|
(mapconcat 'identity
|
|
example
|
|
"\n ->\n")
|
|
"\n"))
|
|
examples
|
|
"")))))
|
|
|
|
;;;;; HTML Examples
|
|
|
|
(defun paredit-insert-html-examples ()
|
|
"Insert HTML for a paredit quick reference table."
|
|
(interactive)
|
|
(let ((insert-lines
|
|
(lambda (&rest lines) (dolist (line lines) (insert line) (newline))))
|
|
(initp nil))
|
|
(paredit-do-commands (spec keys fn examples)
|
|
(progn (if initp
|
|
(funcall insert-lines "</table>")
|
|
(setq initp t))
|
|
(funcall insert-lines (concat "<h3>" spec "</h3>"))
|
|
(funcall insert-lines "<table>"))
|
|
(let ((name (symbol-name fn))
|
|
(keys
|
|
(mapconcat (lambda (key)
|
|
(concat "<tt>" (paredit-html-quote key) "</tt>"))
|
|
keys
|
|
", ")))
|
|
(funcall insert-lines "<tr>")
|
|
(funcall insert-lines (concat " <th align=\"left\">" keys "</th>"))
|
|
(funcall insert-lines (concat " <th align=\"left\">" name "</th>"))
|
|
(funcall insert-lines "</tr>")
|
|
(funcall insert-lines
|
|
"<tr><td colspan=\"2\"><table cellpadding=\"5\"><tr>")
|
|
(dolist (example examples)
|
|
(let ((prefix "<td><table border=\"1\"><tr><td><table><tr><td><pre>")
|
|
(examples
|
|
(mapconcat 'paredit-html-quote
|
|
example
|
|
(concat "</pre></td></tr>"
|
|
"<tr><th>↓</th></tr>"
|
|
"<tr><td><pre>")))
|
|
(suffix "</pre></td></tr></table></td></tr></table></td>"))
|
|
(funcall insert-lines (concat prefix examples suffix))))
|
|
(funcall insert-lines "</tr></table></td></tr>")))
|
|
(funcall insert-lines "</table>")))
|
|
|
|
(defun paredit-html-quote (string)
|
|
(with-temp-buffer
|
|
(dotimes (i (length string))
|
|
(insert (let ((c (elt string i)))
|
|
(cond ((eq c ?\<) "<")
|
|
((eq c ?\>) ">")
|
|
((eq c ?\&) "&")
|
|
((eq c ?\') "'")
|
|
((eq c ?\") """)
|
|
(t c)))))
|
|
(buffer-string)))
|
|
|
|
;;;; Delimiter Insertion
|
|
|
|
(eval-and-compile
|
|
(defun paredit-conc-name (&rest strings)
|
|
(intern (apply 'concat strings)))
|
|
|
|
(defmacro define-paredit-pair (open close name)
|
|
`(progn
|
|
(defun ,(paredit-conc-name "paredit-open-" name) (&optional n)
|
|
,(concat "Insert a balanced " name " pair.
|
|
With a prefix argument N, put the closing " name " after N
|
|
S-expressions forward.
|
|
If the region is active, `transient-mark-mode' is enabled, and the
|
|
region's start and end fall in the same parenthesis depth, insert a
|
|
" name " pair around the region.
|
|
If in a string or a comment, insert a single " name ".
|
|
If in a character literal, do nothing. This prevents changing what was
|
|
in the character literal to a meaningful delimiter unintentionally.")
|
|
(interactive "P")
|
|
(cond ((or (paredit-in-string-p)
|
|
(paredit-in-comment-p))
|
|
(insert ,open))
|
|
((not (paredit-in-char-p))
|
|
(paredit-insert-pair n ,open ,close 'goto-char)
|
|
(save-excursion (backward-up-list) (indent-sexp)))))
|
|
(defun ,(paredit-conc-name "paredit-close-" name) ()
|
|
,(concat "Move past one closing delimiter and reindent.
|
|
\(Agnostic to the specific closing delimiter.)
|
|
If in a string or comment, insert a single closing " name ".
|
|
If in a character literal, do nothing. This prevents changing what was
|
|
in the character literal to a meaningful delimiter unintentionally.")
|
|
(interactive)
|
|
(paredit-move-past-close ,close))
|
|
(defun ,(paredit-conc-name "paredit-close-" name "-and-newline") ()
|
|
,(concat "Move past one closing delimiter, add a newline,"
|
|
" and reindent.
|
|
If there was a margin comment after the closing delimiter, preserve it
|
|
on the same line.")
|
|
(interactive)
|
|
(paredit-move-past-close-and-newline ,close))
|
|
(defun ,(paredit-conc-name "paredit-wrap-" name)
|
|
(&optional argument)
|
|
,(concat "Wrap the following S-expression.
|
|
See `paredit-wrap-sexp' for more details.")
|
|
(interactive "P")
|
|
(paredit-wrap-sexp argument ,open ,close))
|
|
(add-to-list 'paredit-wrap-commands
|
|
',(paredit-conc-name "paredit-wrap-" name)))))
|
|
|
|
(defvar paredit-wrap-commands '(paredit-wrap-sexp)
|
|
"List of paredit commands that wrap S-expressions.
|
|
Used by `paredit-yank-pop'; for internal paredit use only.")
|
|
|
|
(define-paredit-pair ?\( ?\) "round")
|
|
(define-paredit-pair ?\[ ?\] "square")
|
|
(define-paredit-pair ?\{ ?\} "curly")
|
|
(define-paredit-pair ?\< ?\> "angled")
|
|
|
|
;;; Aliases for the old names.
|
|
|
|
(defalias 'paredit-open-parenthesis 'paredit-open-round)
|
|
(defalias 'paredit-close-parenthesis 'paredit-close-round)
|
|
(defalias 'paredit-close-parenthesis-and-newline
|
|
'paredit-close-round-and-newline)
|
|
|
|
(defalias 'paredit-open-bracket 'paredit-open-square)
|
|
(defalias 'paredit-close-bracket 'paredit-close-square)
|
|
(defalias 'paredit-close-bracket-and-newline
|
|
'paredit-close-square-and-newline)
|
|
|
|
(defun paredit-move-past-close (close)
|
|
(paredit-move-past-close-and close
|
|
(lambda ()
|
|
(paredit-blink-paren-match nil))))
|
|
|
|
(defun paredit-move-past-close-and-newline (close)
|
|
(paredit-move-past-close-and close
|
|
(lambda ()
|
|
(let ((comment.point (paredit-find-comment-on-line)))
|
|
(newline)
|
|
(if comment.point
|
|
(save-excursion
|
|
(forward-line -1)
|
|
(end-of-line)
|
|
(indent-to (cdr comment.point))
|
|
(insert (car comment.point)))))
|
|
(lisp-indent-line)
|
|
(paredit-ignore-sexp-errors (indent-sexp))
|
|
(paredit-blink-paren-match t))))
|
|
|
|
(defun paredit-move-past-close-and (close if-moved)
|
|
(if (or (paredit-in-string-p)
|
|
(paredit-in-comment-p))
|
|
(insert close)
|
|
(if (paredit-in-char-p) (forward-char))
|
|
(paredit-move-past-close-and-reindent close)
|
|
(funcall if-moved)))
|
|
|
|
(defun paredit-find-comment-on-line ()
|
|
"Find a margin comment on the current line.
|
|
Return nil if there is no such comment or if there is anything but
|
|
whitespace until such a comment.
|
|
If such a comment exists, delete the comment (including all leading
|
|
whitespace) and return a cons whose car is the comment as a string
|
|
and whose cdr is the point of the comment's initial semicolon,
|
|
relative to the start of the line."
|
|
(save-excursion
|
|
(paredit-skip-whitespace t (point-at-eol))
|
|
(and (eq ?\; (char-after))
|
|
(not (eq ?\; (char-after (1+ (point)))))
|
|
(not (or (paredit-in-string-p)
|
|
(paredit-in-char-p)))
|
|
(let* ((start ;Move to before the semicolon.
|
|
(progn (backward-char) (point)))
|
|
(comment
|
|
(buffer-substring start (point-at-eol))))
|
|
(paredit-skip-whitespace nil (point-at-bol))
|
|
(delete-region (point) (point-at-eol))
|
|
(cons comment (- start (point-at-bol)))))))
|
|
|
|
(defun paredit-insert-pair (n open close forward)
|
|
(let* ((regionp
|
|
(and (paredit-region-active-p)
|
|
(paredit-region-safe-for-insert-p)))
|
|
(end
|
|
(and regionp
|
|
(not n)
|
|
(prog1 (region-end) (goto-char (region-beginning))))))
|
|
(let ((spacep (paredit-space-for-delimiter-p nil open)))
|
|
(if spacep (insert " "))
|
|
(insert open)
|
|
(save-excursion
|
|
;; Move past the desired region.
|
|
(cond (n
|
|
(funcall forward
|
|
(paredit-scan-sexps-hack (point)
|
|
(prefix-numeric-value n))))
|
|
(regionp
|
|
(funcall forward (+ end (if spacep 2 1)))))
|
|
;; The string case can happen if we are inserting string
|
|
;; delimiters. The comment case may happen by moving to the
|
|
;; end of a buffer that has a comment with no trailing newline.
|
|
(if (and (not (paredit-in-string-p))
|
|
(paredit-in-comment-p))
|
|
(newline))
|
|
(insert close)
|
|
(if (paredit-space-for-delimiter-p t close)
|
|
(insert " "))))))
|
|
|
|
;++ This needs a better name...
|
|
|
|
(defun paredit-scan-sexps-hack (point n)
|
|
(save-excursion
|
|
(goto-char point)
|
|
(let ((direction (if (< 0 n) +1 -1))
|
|
(magnitude (abs n))
|
|
(count 0))
|
|
(catch 'exit
|
|
(while (< count magnitude)
|
|
(let ((p
|
|
(paredit-handle-sexp-errors (scan-sexps (point) direction)
|
|
nil)))
|
|
(if (not p) (throw 'exit nil))
|
|
(goto-char p))
|
|
(setq count (+ count 1)))))
|
|
(point)))
|
|
|
|
(defun paredit-region-safe-for-insert-p ()
|
|
(save-excursion
|
|
(let ((beginning (region-beginning))
|
|
(end (region-end)))
|
|
(goto-char beginning)
|
|
(let* ((beginning-state (paredit-current-parse-state))
|
|
(end-state
|
|
(parse-partial-sexp beginning end nil nil beginning-state)))
|
|
(and (= (nth 0 beginning-state) ; 0. depth in parens
|
|
(nth 0 end-state))
|
|
(eq (nth 3 beginning-state) ; 3. non-nil if inside a
|
|
(nth 3 end-state)) ; string
|
|
(eq (nth 4 beginning-state) ; 4. comment status, yada
|
|
(nth 4 end-state))
|
|
(eq (nth 5 beginning-state) ; 5. t if following char
|
|
(nth 5 end-state))))))) ; quote
|
|
|
|
(defvar paredit-space-for-delimiter-predicates nil
|
|
"List of predicates for whether to put space by delimiter at point.
|
|
Each predicate is a function that is is applied to two arguments, ENDP
|
|
and DELIMITER, and that returns a boolean saying whether to put a
|
|
space next to the delimiter -- before/after the delimiter if ENDP is
|
|
false/true, respectively.
|
|
If any predicate returns false, no space is inserted: every predicate
|
|
has veto power.
|
|
Each predicate may assume that the point is not at the beginning/end of
|
|
the buffer, and that the point is preceded/followed by a word
|
|
constituent, symbol constituent, string quote, or delimiter matching
|
|
DELIMITER, if ENDP is false/true, respectively.
|
|
Each predicate should examine only text before/after the point if ENDP is
|
|
false/true, respectively.")
|
|
|
|
(defun paredit-space-for-delimiter-p (endp delimiter)
|
|
;; If at the buffer limit, don't insert a space. If there is a word,
|
|
;; symbol, other quote, or non-matching parenthesis delimiter (i.e. a
|
|
;; close when want an open the string or an open when we want to
|
|
;; close the string), do insert a space.
|
|
(and (not (if endp (eobp) (bobp)))
|
|
(memq (char-syntax (if endp (char-after) (char-before)))
|
|
(list ?w ?_ ?\"
|
|
(let ((matching (matching-paren delimiter)))
|
|
(and matching (char-syntax matching)))
|
|
(and (not endp)
|
|
(eq ?\" (char-syntax delimiter))
|
|
?\) )))
|
|
(catch 'exit
|
|
(dolist (predicate paredit-space-for-delimiter-predicates)
|
|
(if (not (funcall predicate endp delimiter))
|
|
(throw 'exit nil)))
|
|
t)))
|
|
|
|
(defun paredit-move-past-close-and-reindent (close)
|
|
(let ((open (paredit-missing-close)))
|
|
(if open
|
|
(if (eq close (matching-paren open))
|
|
(save-excursion
|
|
(message "Missing closing delimiter: %c" close)
|
|
(insert close))
|
|
(error "Mismatched missing closing delimiter: %c ... %c"
|
|
open close))))
|
|
(up-list)
|
|
(if (catch 'return ; This CATCH returns T if it
|
|
(while t ; should delete leading spaces
|
|
(save-excursion ; and NIL if not.
|
|
(let ((before-paren (1- (point))))
|
|
(back-to-indentation)
|
|
(cond ((not (eq (point) before-paren))
|
|
;; Can't call PAREDIT-DELETE-LEADING-WHITESPACE
|
|
;; here -- we must return from SAVE-EXCURSION
|
|
;; first.
|
|
(throw 'return t))
|
|
((save-excursion (forward-line -1)
|
|
(end-of-line)
|
|
(paredit-in-comment-p))
|
|
;; Moving the closing delimiter any further
|
|
;; would put it into a comment, so we just
|
|
;; indent the closing delimiter where it is and
|
|
;; abort the loop, telling its continuation that
|
|
;; no leading whitespace should be deleted.
|
|
(lisp-indent-line)
|
|
(throw 'return nil))
|
|
(t (delete-indentation)))))))
|
|
(paredit-delete-leading-whitespace)))
|
|
|
|
(defun paredit-missing-close ()
|
|
(save-excursion
|
|
(paredit-handle-sexp-errors (backward-up-list)
|
|
(error "Not inside a list."))
|
|
(let ((open (char-after)))
|
|
(paredit-handle-sexp-errors (progn (forward-sexp) nil)
|
|
open))))
|
|
|
|
(defun paredit-delete-leading-whitespace ()
|
|
;; This assumes that we're on the closing delimiter already.
|
|
(save-excursion
|
|
(backward-char)
|
|
(while (let ((syn (char-syntax (char-before))))
|
|
(and (or (eq syn ?\ ) (eq syn ?-)) ; whitespace syntax
|
|
;; The above line is a perfect example of why the
|
|
;; following test is necessary.
|
|
(not (paredit-in-char-p (1- (point))))))
|
|
(delete-char -1))))
|
|
|
|
(defun paredit-blink-paren-match (another-line-p)
|
|
(if (and blink-matching-paren
|
|
(or (not show-paren-mode) another-line-p))
|
|
(paredit-ignore-sexp-errors
|
|
(save-excursion
|
|
(backward-sexp)
|
|
(forward-sexp)
|
|
;; SHOW-PAREN-MODE inhibits any blinking, so we disable it
|
|
;; locally here.
|
|
(let ((show-paren-mode nil))
|
|
(blink-matching-open))))))
|
|
|
|
(defun paredit-doublequote (&optional n)
|
|
"Insert a pair of double-quotes.
|
|
With a prefix argument N, wrap the following N S-expressions in
|
|
double-quotes, escaping intermediate characters if necessary.
|
|
If the region is active, `transient-mark-mode' is enabled, and the
|
|
region's start and end fall in the same parenthesis depth, insert a
|
|
pair of double-quotes around the region, again escaping intermediate
|
|
characters if necessary.
|
|
Inside a comment, insert a literal double-quote.
|
|
At the end of a string, move past the closing double-quote.
|
|
In the middle of a string, insert a backslash-escaped double-quote.
|
|
If in a character literal, do nothing. This prevents accidentally
|
|
changing a what was in the character literal to become a meaningful
|
|
delimiter unintentionally."
|
|
(interactive "P")
|
|
(cond ((paredit-in-string-p)
|
|
(if (eq (point) (- (paredit-enclosing-string-end) 1))
|
|
(forward-char) ; Just move past the closing quote.
|
|
;; Don't split a \x into an escaped backslash and a string end.
|
|
(if (paredit-in-string-escape-p) (forward-char))
|
|
(insert ?\\ ?\" )))
|
|
((paredit-in-comment-p)
|
|
(insert ?\" ))
|
|
((not (paredit-in-char-p))
|
|
(paredit-insert-pair n ?\" ?\" 'paredit-forward-for-quote))))
|
|
|
|
(defun paredit-meta-doublequote (&optional n)
|
|
"Move to the end of the string.
|
|
If not in a string, act as `paredit-doublequote'; if not prefix argument
|
|
is specified and the region is not active or `transient-mark-mode' is
|
|
disabled, the default is to wrap one S-expression, however, not zero."
|
|
(interactive "P")
|
|
(if (not (paredit-in-string-p))
|
|
(paredit-doublequote (or n (and (not (paredit-region-active-p)) 1)))
|
|
(goto-char (paredit-enclosing-string-end))))
|
|
|
|
(defun paredit-meta-doublequote-and-newline (&optional n)
|
|
"Move to the end of the string, insert a newline, and indent.
|
|
If not in a string, act as `paredit-doublequote'; if not prefix argument
|
|
is specified and the region is not active or `transient-mark-mode' is
|
|
disabled, the default is to wrap one S-expression, however, not zero."
|
|
(interactive "P")
|
|
(if (not (paredit-in-string-p))
|
|
(paredit-doublequote (or n (and (not (paredit-region-active-p)) 1)))
|
|
(progn (goto-char (paredit-enclosing-string-end))
|
|
(newline)
|
|
(lisp-indent-line)
|
|
(paredit-ignore-sexp-errors (indent-sexp)))))
|
|
|
|
(defun paredit-forward-for-quote (end)
|
|
(let ((state (paredit-current-parse-state)))
|
|
(while (< (point) end)
|
|
(let ((new-state (parse-partial-sexp (point) (1+ (point))
|
|
nil nil state)))
|
|
(if (paredit-in-string-p new-state)
|
|
(if (not (paredit-in-string-escape-p))
|
|
(setq state new-state)
|
|
;; Escape character: turn it into an escaped escape
|
|
;; character by appending another backslash.
|
|
(insert ?\\ )
|
|
;; Now the point is after both escapes, and we want to
|
|
;; rescan from before the first one to after the second
|
|
;; one.
|
|
(setq state
|
|
(parse-partial-sexp (- (point) 2) (point)
|
|
nil nil state))
|
|
;; Advance the end point, since we just inserted a new
|
|
;; character.
|
|
(setq end (1+ end)))
|
|
;; String: escape by inserting a backslash before the quote.
|
|
(backward-char)
|
|
(insert ?\\ )
|
|
;; The point is now between the escape and the quote, and we
|
|
;; want to rescan from before the escape to after the quote.
|
|
(setq state
|
|
(parse-partial-sexp (1- (point)) (1+ (point))
|
|
nil nil state))
|
|
;; Advance the end point for the same reason as above.
|
|
(setq end (1+ end)))))))
|
|
|
|
;;;; Escape Insertion
|
|
|
|
(defun paredit-backslash ()
|
|
"Insert a backslash followed by a character to escape."
|
|
(interactive)
|
|
(cond ((paredit-in-string-p) (paredit-backslash-interactive))
|
|
((paredit-in-comment-p) (insert ?\\))
|
|
((paredit-in-char-p) (forward-char) (paredit-backslash-interactive))
|
|
(t (paredit-backslash-interactive))))
|
|
|
|
(defun paredit-backslash-interactive ()
|
|
(insert ?\\ )
|
|
;; Read a character to insert after the backslash. If anything
|
|
;; goes wrong -- the user hits delete (entering the rubout
|
|
;; `character'), aborts with C-g, or enters non-character input
|
|
;; -- then delete the backslash to avoid a dangling escape.
|
|
(let ((delete-p t))
|
|
(unwind-protect
|
|
(let ((char (read-char "Character to escape: " t)))
|
|
(if (not (eq char ?\^?))
|
|
(progn (message "Character to escape: %c" char)
|
|
(insert char)
|
|
(setq delete-p nil))))
|
|
(if delete-p
|
|
(progn (message "Deleting escape.")
|
|
(delete-char -1))))))
|
|
|
|
(defun paredit-newline ()
|
|
"Insert a newline and indent it.
|
|
This is like `newline-and-indent', but it not only indents the line
|
|
that the point is on but also the S-expression following the point,
|
|
if there is one.
|
|
Move forward one character first if on an escaped character.
|
|
If in a string, just insert a literal newline.
|
|
If in a comment and if followed by invalid structure, call
|
|
`indent-new-comment-line' to keep the invalid structure in a
|
|
comment."
|
|
(interactive)
|
|
(cond ((paredit-in-string-p)
|
|
(newline))
|
|
((paredit-in-comment-p)
|
|
(if (paredit-region-ok-p (point) (point-at-eol))
|
|
(progn (newline-and-indent)
|
|
(paredit-ignore-sexp-errors (indent-sexp)))
|
|
(indent-new-comment-line)))
|
|
(t
|
|
(if (paredit-in-char-p)
|
|
(forward-char))
|
|
(newline-and-indent)
|
|
;; Indent the following S-expression, but don't signal an
|
|
;; error if there's only a closing delimiter after the point.
|
|
(paredit-ignore-sexp-errors (indent-sexp)))))
|
|
|
|
(defun paredit-reindent-defun (&optional argument)
|
|
"Reindent the definition that the point is on.
|
|
If the point is in a string or a comment, fill the paragraph instead,
|
|
and with a prefix argument, justify as well."
|
|
(interactive "P")
|
|
(if (or (paredit-in-string-p)
|
|
(paredit-in-comment-p))
|
|
(lisp-fill-paragraph argument)
|
|
(paredit-preserving-column
|
|
(save-excursion
|
|
(end-of-defun)
|
|
(beginning-of-defun)
|
|
(indent-sexp)))))
|
|
|
|
;;;; Comment Insertion
|
|
|
|
(defun paredit-semicolon (&optional n)
|
|
"Insert a semicolon.
|
|
With a prefix argument N, insert N semicolons.
|
|
If in a string, do just that and nothing else.
|
|
If in a character literal, move to the beginning of the character
|
|
literal before inserting the semicolon.
|
|
If the enclosing list ends on the line after the point, break the line
|
|
after the last S-expression following the point.
|
|
If a list begins on the line after the point but ends on a different
|
|
line, break the line after the last S-expression following the point
|
|
before the list."
|
|
(interactive "p")
|
|
(if (or (paredit-in-string-p) (paredit-in-comment-p))
|
|
(insert (make-string (or n 1) ?\; ))
|
|
(if (paredit-in-char-p)
|
|
(backward-char 2))
|
|
(let ((line-break-point (paredit-semicolon-find-line-break-point)))
|
|
(if line-break-point
|
|
(paredit-semicolon-with-line-break line-break-point (or n 1))
|
|
(insert (make-string (or n 1) ?\; ))))))
|
|
|
|
(defun paredit-semicolon-find-line-break-point ()
|
|
(and (not (eolp)) ;Implies (not (eobp)).
|
|
(let ((eol (point-at-eol)))
|
|
(save-excursion
|
|
(catch 'exit
|
|
(while t
|
|
(let ((line-break-point (point)))
|
|
(cond ((paredit-handle-sexp-errors (progn (forward-sexp) t)
|
|
nil)
|
|
;; Successfully advanced by an S-expression.
|
|
;; If that S-expression started on this line
|
|
;; and ended on another one, break here.
|
|
(cond ((not (eq eol (point-at-eol)))
|
|
(throw 'exit
|
|
(and (save-excursion
|
|
(backward-sexp)
|
|
(eq eol (point-at-eol)))
|
|
line-break-point)))
|
|
((eobp)
|
|
(throw 'exit nil))))
|
|
((save-excursion
|
|
(paredit-skip-whitespace t (point-at-eol))
|
|
(or (eolp) (eobp) (eq (char-after) ?\;)))
|
|
;; Can't move further, but there's no closing
|
|
;; delimiter we're about to clobber -- either
|
|
;; it's on the next line or we're at the end of
|
|
;; the buffer. Don't break the line.
|
|
(throw 'exit nil))
|
|
(t
|
|
;; Can't move because we hit a delimiter at the
|
|
;; end of this line. Break here.
|
|
(throw 'exit line-break-point))))))))))
|
|
|
|
(defun paredit-semicolon-with-line-break (line-break-point n)
|
|
(let ((line-break-marker (make-marker)))
|
|
(set-marker line-break-marker line-break-point)
|
|
(set-marker-insertion-type line-break-marker t)
|
|
(insert (make-string (or n 1) ?\; ))
|
|
(save-excursion
|
|
(goto-char line-break-marker)
|
|
(set-marker line-break-marker nil)
|
|
(newline)
|
|
(lisp-indent-line)
|
|
;; This step is redundant if we are inside a list, but even if we
|
|
;; are at the top level, we want at least to indent whatever we
|
|
;; bumped off the line.
|
|
(paredit-ignore-sexp-errors (indent-sexp))
|
|
(paredit-indent-sexps))))
|
|
|
|
;;; This is all a horrible, horrible hack, primarily for GNU Emacs 21,
|
|
;;; in which there is no `comment-or-uncomment-region'.
|
|
|
|
(autoload 'comment-forward "newcomment")
|
|
(autoload 'comment-normalize-vars "newcomment")
|
|
(autoload 'comment-region "newcomment")
|
|
(autoload 'comment-search-forward "newcomment")
|
|
(autoload 'uncomment-region "newcomment")
|
|
|
|
(defun paredit-initialize-comment-dwim ()
|
|
(require 'newcomment)
|
|
(if (not (fboundp 'comment-or-uncomment-region))
|
|
(defalias 'comment-or-uncomment-region
|
|
(lambda (beginning end &optional argument)
|
|
(interactive "*r\nP")
|
|
(if (save-excursion (goto-char beginning)
|
|
(comment-forward (point-max))
|
|
(<= end (point)))
|
|
(uncomment-region beginning end argument)
|
|
(comment-region beginning end argument)))))
|
|
(defalias 'paredit-initialize-comment-dwim 'comment-normalize-vars)
|
|
(comment-normalize-vars))
|
|
|
|
(defun paredit-comment-dwim (&optional argument)
|
|
"Call the Lisp comment command you want (Do What I Mean).
|
|
This is like `comment-dwim', but it is specialized for Lisp editing.
|
|
If transient mark mode is enabled and the mark is active, comment or
|
|
uncomment the selected region, depending on whether it was entirely
|
|
commented not not already.
|
|
If there is already a comment on the current line, with no prefix
|
|
argument, indent to that comment; with a prefix argument, kill that
|
|
comment.
|
|
Otherwise, insert a comment appropriate for the context and ensure that
|
|
any code following the comment is moved to the next line.
|
|
At the top level, where indentation is calculated to be at column 0,
|
|
insert a triple-semicolon comment; within code, where the indentation
|
|
is calculated to be non-zero, and on the line there is either no code
|
|
at all or code after the point, insert a double-semicolon comment;
|
|
and if the point is after all code on the line, insert a single-
|
|
semicolon margin comment at `comment-column'."
|
|
(interactive "*P")
|
|
(paredit-initialize-comment-dwim)
|
|
(cond ((paredit-region-active-p)
|
|
(comment-or-uncomment-region (region-beginning)
|
|
(region-end)
|
|
argument))
|
|
((paredit-comment-on-line-p)
|
|
(if argument
|
|
(comment-kill (if (integerp argument) argument nil))
|
|
(comment-indent)))
|
|
(t (paredit-insert-comment))))
|
|
|
|
(defun paredit-comment-on-line-p ()
|
|
"True if there is a comment on the line following point.
|
|
This is expected to be called only in `paredit-comment-dwim'; do not
|
|
call it elsewhere."
|
|
(save-excursion
|
|
(beginning-of-line)
|
|
(let ((comment-p nil))
|
|
;; Search forward for a comment beginning. If there is one, set
|
|
;; COMMENT-P to true; if not, it will be nil.
|
|
(while (progn
|
|
(setq comment-p ;t -> no error
|
|
(comment-search-forward (point-at-eol) t))
|
|
(and comment-p
|
|
(or (paredit-in-string-p)
|
|
(paredit-in-char-p (1- (point))))))
|
|
(forward-char))
|
|
comment-p)))
|
|
|
|
(defun paredit-insert-comment ()
|
|
(let ((code-after-p
|
|
(save-excursion (paredit-skip-whitespace t (point-at-eol))
|
|
(not (eolp))))
|
|
(code-before-p
|
|
(save-excursion (paredit-skip-whitespace nil (point-at-bol))
|
|
(not (bolp)))))
|
|
(cond ((and (bolp)
|
|
(let ((indent
|
|
(let ((indent (calculate-lisp-indent)))
|
|
(if (consp indent) (car indent) indent))))
|
|
(and indent (zerop indent))))
|
|
;; Top-level comment
|
|
(if code-after-p (save-excursion (newline)))
|
|
(insert ";;; "))
|
|
((or code-after-p (not code-before-p))
|
|
;; Code comment
|
|
(if code-before-p
|
|
(newline-and-indent)
|
|
(lisp-indent-line))
|
|
(insert ";; ")
|
|
(if code-after-p
|
|
(save-excursion
|
|
(newline)
|
|
(lisp-indent-line)
|
|
(paredit-indent-sexps))))
|
|
(t
|
|
;; Margin comment
|
|
(indent-to comment-column 1) ; 1 -> force one leading space
|
|
(insert ?\; )))))
|
|
|
|
;;;; Character Deletion
|
|
|
|
(defun paredit-forward-delete (&optional argument)
|
|
"Delete a character forward or move forward over a delimiter.
|
|
If on an opening S-expression delimiter, move forward into the
|
|
S-expression.
|
|
If on a closing S-expression delimiter, refuse to delete unless the
|
|
S-expression is empty, in which case delete the whole S-expression.
|
|
With a numeric prefix argument N, delete N characters forward.
|
|
With a `C-u' prefix argument, simply delete a character forward,
|
|
without regard for delimiter balancing."
|
|
(interactive "P")
|
|
(cond ((or (consp argument) (eobp))
|
|
(delete-char +1))
|
|
((integerp argument)
|
|
(if (< argument 0)
|
|
(paredit-backward-delete argument)
|
|
(while (> argument 0)
|
|
(paredit-forward-delete)
|
|
(setq argument (- argument 1)))))
|
|
((paredit-in-string-p)
|
|
(paredit-forward-delete-in-string))
|
|
((paredit-in-comment-p)
|
|
(paredit-forward-delete-in-comment))
|
|
((paredit-in-char-p) ; Escape -- delete both chars.
|
|
(delete-char -1)
|
|
(delete-char +1))
|
|
((eq (char-after) ?\\ ) ; ditto
|
|
(delete-char +2))
|
|
((let ((syn (char-syntax (char-after))))
|
|
(or (eq syn ?\( )
|
|
(eq syn ?\" )))
|
|
(if (save-excursion
|
|
(paredit-handle-sexp-errors (progn (forward-sexp) t)
|
|
nil))
|
|
(forward-char)
|
|
(message "Deleting spurious opening delimiter.")
|
|
(delete-char +1)))
|
|
((and (not (paredit-in-char-p (1- (point))))
|
|
(eq (char-syntax (char-after)) ?\) )
|
|
(eq (char-before) (matching-paren (char-after))))
|
|
(delete-char -1) ; Empty list -- delete both
|
|
(delete-char +1)) ; delimiters.
|
|
((eq ?\; (char-after))
|
|
(paredit-forward-delete-comment-start))
|
|
((eq (char-syntax (char-after)) ?\) )
|
|
(if (paredit-handle-sexp-errors
|
|
(save-excursion (forward-char) (backward-sexp) t)
|
|
nil)
|
|
(message "End of list!")
|
|
(progn
|
|
(message "Deleting spurious closing delimiter.")
|
|
(delete-char +1))))
|
|
;; Just delete a single character, if it's not a closing
|
|
;; delimiter. (The character literal case is already handled
|
|
;; by now.)
|
|
(t (delete-char +1))))
|
|
|
|
(defun paredit-forward-delete-in-string ()
|
|
(let ((start+end (paredit-string-start+end-points)))
|
|
(cond ((not (eq (point) (cdr start+end)))
|
|
;; If it's not the close-quote, it's safe to delete. But
|
|
;; first handle the case that we're in a string escape.
|
|
(cond ((paredit-in-string-escape-p)
|
|
;; We're right after the backslash, so backward
|
|
;; delete it before deleting the escaped character.
|
|
(delete-char -1))
|
|
((eq (char-after) ?\\ )
|
|
;; If we're not in a string escape, but we are on a
|
|
;; backslash, it must start the escape for the next
|
|
;; character, so delete the backslash before deleting
|
|
;; the next character.
|
|
(delete-char +1)))
|
|
(delete-char +1))
|
|
((eq (1- (point)) (car start+end))
|
|
;; If it is the close-quote, delete only if we're also right
|
|
;; past the open-quote (i.e. it's empty), and then delete
|
|
;; both quotes. Otherwise we refuse to delete it.
|
|
(delete-char -1)
|
|
(delete-char +1)))))
|
|
|
|
(defun paredit-check-forward-delete-in-comment ()
|
|
;; Point is in a comment, possibly at eol. We are about to delete
|
|
;; some characters forward; if we are at eol, we are about to delete
|
|
;; the line break. Refuse to do so if if moving the next line into
|
|
;; the comment would break structure.
|
|
(if (eolp)
|
|
(let ((next-line-start (point-at-bol 2))
|
|
(next-line-end (point-at-eol 2)))
|
|
(paredit-check-region next-line-start next-line-end))))
|
|
|
|
(defun paredit-forward-delete-in-comment ()
|
|
(paredit-check-forward-delete-in-comment)
|
|
(delete-char +1))
|
|
|
|
(defun paredit-forward-delete-comment-start ()
|
|
;; Point precedes a comment start (not at eol). Refuse to delete a
|
|
;; comment start if the comment contains unbalanced junk.
|
|
(paredit-check-region (+ (point) 1) (point-at-eol))
|
|
(delete-char +1))
|
|
|
|
(defun paredit-backward-delete (&optional argument)
|
|
"Delete a character backward or move backward over a delimiter.
|
|
If on a closing S-expression delimiter, move backward into the
|
|
S-expression.
|
|
If on an opening S-expression delimiter, refuse to delete unless the
|
|
S-expression is empty, in which case delete the whole S-expression.
|
|
With a numeric prefix argument N, delete N characters backward.
|
|
With a `C-u' prefix argument, simply delete a character backward,
|
|
without regard for delimiter balancing."
|
|
(interactive "P")
|
|
(cond ((or (consp argument) (bobp))
|
|
;++ Should this untabify?
|
|
(delete-char -1))
|
|
((integerp argument)
|
|
(if (< argument 0)
|
|
(paredit-forward-delete (- 0 argument))
|
|
(while (> argument 0)
|
|
(paredit-backward-delete)
|
|
(setq argument (- argument 1)))))
|
|
((paredit-in-string-p)
|
|
(paredit-backward-delete-in-string))
|
|
((paredit-in-comment-p)
|
|
(paredit-backward-delete-in-comment))
|
|
((paredit-in-char-p) ; Escape -- delete both chars.
|
|
(delete-char -1)
|
|
(delete-char +1))
|
|
((paredit-in-char-p (1- (point)))
|
|
(delete-char -2)) ; ditto
|
|
((let ((syn (char-syntax (char-before))))
|
|
(or (eq syn ?\) )
|
|
(eq syn ?\" )))
|
|
(if (save-excursion
|
|
(paredit-handle-sexp-errors (progn (backward-sexp) t)
|
|
nil))
|
|
(backward-char)
|
|
(message "Deleting spurious closing delimiter.")
|
|
(delete-char -1)))
|
|
((and (eq (char-syntax (char-before)) ?\( )
|
|
(eq (char-after) (matching-paren (char-before))))
|
|
(delete-char -1) ; Empty list -- delete both
|
|
(delete-char +1)) ; delimiters.
|
|
((bolp)
|
|
(paredit-backward-delete-maybe-comment-end))
|
|
((eq (char-syntax (char-before)) ?\( )
|
|
(if (paredit-handle-sexp-errors
|
|
(save-excursion (backward-char) (forward-sexp) t)
|
|
nil)
|
|
(message "Beginning of list!")
|
|
(progn
|
|
(message "Deleting spurious closing delimiter.")
|
|
(delete-char -1))))
|
|
;; Delete it, unless it's an opening delimiter. The case of
|
|
;; character literals is already handled by now.
|
|
(t
|
|
;; Turn off the @#&*&!^&(%^ botch in GNU Emacs 24 that changed
|
|
;; `backward-delete-char' and `backward-delete-char-untabify'
|
|
;; semantically so that they delete the region in transient
|
|
;; mark mode.
|
|
(let ((delete-active-region nil))
|
|
(backward-delete-char-untabify +1)))))
|
|
|
|
(defun paredit-backward-delete-in-string ()
|
|
(let ((start+end (paredit-string-start+end-points)))
|
|
(cond ((not (eq (1- (point)) (car start+end)))
|
|
;; If it's not the open-quote, it's safe to delete.
|
|
(if (paredit-in-string-escape-p)
|
|
;; If we're on a string escape, since we're about to
|
|
;; delete the backslash, we must first delete the
|
|
;; escaped char.
|
|
(delete-char +1))
|
|
(delete-char -1)
|
|
(if (paredit-in-string-escape-p)
|
|
;; If, after deleting a character, we find ourselves in
|
|
;; a string escape, we must have deleted the escaped
|
|
;; character, and the backslash is behind the point, so
|
|
;; backward delete it.
|
|
(delete-char -1)))
|
|
((eq (point) (cdr start+end))
|
|
;; If it is the open-quote, delete only if we're also right
|
|
;; past the close-quote (i.e. it's empty), and then delete
|
|
;; both quotes. Otherwise we refuse to delete it.
|
|
(delete-char -1)
|
|
(delete-char +1)))))
|
|
|
|
(defun paredit-backward-delete-in-comment ()
|
|
;; Point is in a comment, possibly just after the comment start.
|
|
;; Refuse to delete a comment start if the comment contains
|
|
;; unbalanced junk.
|
|
(if (save-excursion
|
|
(backward-char)
|
|
;; Must call `paredit-in-string-p' before
|
|
;; `paredit-in-comment-p'.
|
|
(not (or (paredit-in-string-p) (paredit-in-comment-p))))
|
|
(paredit-check-region (point) (point-at-eol)))
|
|
(backward-delete-char-untabify +1))
|
|
|
|
(defun paredit-backward-delete-maybe-comment-end ()
|
|
;; Point is at bol, possibly just after a comment end (i.e., the
|
|
;; previous line may have had a line comment). Refuse to delete a
|
|
;; comment end if moving the current line into the previous line's
|
|
;; comment would break structure.
|
|
(if (save-excursion
|
|
(backward-char)
|
|
(and (not (paredit-in-string-p)) (paredit-in-comment-p)))
|
|
(paredit-check-region (point-at-eol) (point-at-bol)))
|
|
(delete-char -1))
|
|
|
|
;;;; Killing
|
|
|
|
(defun paredit-kill (&optional argument)
|
|
"Kill a line as if with `kill-line', but respecting delimiters.
|
|
In a string, act exactly as `kill-line' but do not kill past the
|
|
closing string delimiter.
|
|
On a line with no S-expressions on it starting after the point or
|
|
within a comment, act exactly as `kill-line'.
|
|
Otherwise, kill all S-expressions that start after the point.
|
|
With a `C-u' prefix argument, just do the standard `kill-line'.
|
|
With a numeric prefix argument N, do `kill-line' that many times."
|
|
(interactive "P")
|
|
(cond (argument
|
|
(kill-line (if (integerp argument) argument 1)))
|
|
((paredit-in-string-p)
|
|
(paredit-kill-line-in-string))
|
|
((paredit-in-comment-p)
|
|
(paredit-kill-line-in-comment))
|
|
((save-excursion (paredit-skip-whitespace t (point-at-eol))
|
|
(or (eolp) (eq (char-after) ?\; )))
|
|
;** Be careful about trailing backslashes.
|
|
(if (paredit-in-char-p)
|
|
(backward-char))
|
|
(kill-line))
|
|
(t (paredit-kill-sexps-on-line))))
|
|
|
|
(defun paredit-kill-line-in-string ()
|
|
(if (save-excursion (paredit-skip-whitespace t (point-at-eol))
|
|
(eolp))
|
|
(kill-line)
|
|
(save-excursion
|
|
;; Be careful not to split an escape sequence.
|
|
(if (paredit-in-string-escape-p)
|
|
(backward-char))
|
|
(kill-region (point)
|
|
(min (point-at-eol)
|
|
(cdr (paredit-string-start+end-points)))))))
|
|
|
|
(defun paredit-kill-line-in-comment ()
|
|
;; The variable `kill-whole-line' is not relevant: the point is in a
|
|
;; comment, and hence not at the beginning of the line.
|
|
(paredit-check-forward-delete-in-comment)
|
|
(kill-line))
|
|
|
|
(defun paredit-kill-sexps-on-line ()
|
|
(if (paredit-in-char-p) ; Move past the \ and prefix.
|
|
(backward-char 2)) ; (# in Scheme/CL, ? in elisp)
|
|
(let ((beginning (point))
|
|
(eol (point-at-eol)))
|
|
(let ((end-of-list-p (paredit-forward-sexps-to-kill beginning eol)))
|
|
;; If we got to the end of the list and it's on the same line,
|
|
;; move backward past the closing delimiter before killing. (This
|
|
;; allows something like killing the whitespace in ( ).)
|
|
(if end-of-list-p (progn (up-list) (backward-char)))
|
|
(if kill-whole-line
|
|
(paredit-kill-sexps-on-whole-line beginning)
|
|
(kill-region beginning
|
|
;; If all of the S-expressions were on one line,
|
|
;; i.e. we're still on that line after moving past
|
|
;; the last one, kill the whole line, including
|
|
;; any comments; otherwise just kill to the end of
|
|
;; the last S-expression we found. Be sure,
|
|
;; though, not to kill any closing parentheses.
|
|
(if (and (not end-of-list-p)
|
|
(eq (point-at-eol) eol))
|
|
eol
|
|
(point)))))))
|
|
|
|
;;; Please do not try to understand this code unless you have a VERY
|
|
;;; good reason to do so. I gave up trying to figure it out well
|
|
;;; enough to explain it, long ago.
|
|
|
|
(defun paredit-forward-sexps-to-kill (beginning eol)
|
|
(let ((end-of-list-p nil)
|
|
(firstp t))
|
|
;; Move to the end of the last S-expression that started on this
|
|
;; line, or to the closing delimiter if the last S-expression in
|
|
;; this list is on the line.
|
|
(catch 'return
|
|
(while t
|
|
;; This and the `kill-whole-line' business below fix a bug that
|
|
;; inhibited any S-expression at the very end of the buffer
|
|
;; (with no trailing newline) from being deleted. It's a
|
|
;; bizarre fix that I ought to document at some point, but I am
|
|
;; too busy at the moment to do so.
|
|
(if (and kill-whole-line (eobp)) (throw 'return nil))
|
|
(save-excursion
|
|
(paredit-handle-sexp-errors (forward-sexp)
|
|
(up-list)
|
|
(setq end-of-list-p (eq (point-at-eol) eol))
|
|
(throw 'return nil))
|
|
(if (or (and (not firstp)
|
|
(not kill-whole-line)
|
|
(eobp))
|
|
(paredit-handle-sexp-errors
|
|
(progn (backward-sexp) nil)
|
|
t)
|
|
(not (eq (point-at-eol) eol)))
|
|
(throw 'return nil)))
|
|
(forward-sexp)
|
|
(if (and firstp
|
|
(not kill-whole-line)
|
|
(eobp))
|
|
(throw 'return nil))
|
|
(setq firstp nil)))
|
|
end-of-list-p))
|
|
|
|
(defun paredit-kill-sexps-on-whole-line (beginning)
|
|
(kill-region beginning
|
|
(or (save-excursion ; Delete trailing indentation...
|
|
(paredit-skip-whitespace t)
|
|
(and (not (eq (char-after) ?\; ))
|
|
(point)))
|
|
;; ...or just use the point past the newline, if
|
|
;; we encounter a comment.
|
|
(point-at-eol)))
|
|
(cond ((save-excursion (paredit-skip-whitespace nil (point-at-bol))
|
|
(bolp))
|
|
;; Nothing but indentation before the point, so indent it.
|
|
(lisp-indent-line))
|
|
((eobp) nil) ; Protect the CHAR-SYNTAX below against NIL.
|
|
;; Insert a space to avoid invalid joining if necessary.
|
|
((let ((syn-before (char-syntax (char-before)))
|
|
(syn-after (char-syntax (char-after))))
|
|
(or (and (eq syn-before ?\) ) ; Separate opposing
|
|
(eq syn-after ?\( )) ; parentheses,
|
|
(and (eq syn-before ?\" ) ; string delimiter
|
|
(eq syn-after ?\" )) ; pairs,
|
|
(and (memq syn-before '(?_ ?w)) ; or word or symbol
|
|
(memq syn-after '(?_ ?w))))) ; constituents.
|
|
(insert " "))))
|
|
|
|
;;;;; Killing Words
|
|
|
|
;;; This is tricky and asymmetrical because backward parsing is
|
|
;;; extraordinarily difficult or impossible, so we have to implement
|
|
;;; killing in both directions by parsing forward.
|
|
|
|
(defun paredit-forward-kill-word ()
|
|
"Kill a word forward, skipping over intervening delimiters."
|
|
(interactive)
|
|
(let ((beginning (point)))
|
|
(skip-syntax-forward " -")
|
|
(let* ((parse-state (paredit-current-parse-state))
|
|
(state (paredit-kill-word-state parse-state 'char-after)))
|
|
(while (not (or (eobp)
|
|
(eq ?w (char-syntax (char-after)))))
|
|
(setq parse-state
|
|
(progn (forward-char 1) (paredit-current-parse-state))
|
|
;; (parse-partial-sexp (point) (1+ (point))
|
|
;; nil nil parse-state)
|
|
)
|
|
(let* ((old-state state)
|
|
(new-state
|
|
(paredit-kill-word-state parse-state 'char-after)))
|
|
(cond ((not (eq old-state new-state))
|
|
(setq parse-state
|
|
(paredit-kill-word-hack old-state
|
|
new-state
|
|
parse-state))
|
|
(setq state
|
|
(paredit-kill-word-state parse-state
|
|
'char-after))
|
|
(setq beginning (point)))))))
|
|
(goto-char beginning)
|
|
(kill-word 1)))
|
|
|
|
(defun paredit-backward-kill-word ()
|
|
"Kill a word backward, skipping over any intervening delimiters."
|
|
(interactive)
|
|
(if (not (or (bobp)
|
|
(eq (char-syntax (char-before)) ?w)))
|
|
(let ((end (point)))
|
|
(backward-word 1)
|
|
(forward-word 1)
|
|
(goto-char (min end (point)))
|
|
(let* ((parse-state (paredit-current-parse-state))
|
|
(state
|
|
(paredit-kill-word-state parse-state 'char-before)))
|
|
(while (and (< (point) end)
|
|
(progn
|
|
(setq parse-state
|
|
(parse-partial-sexp (point) (1+ (point))
|
|
nil nil parse-state))
|
|
(or (eq state
|
|
(paredit-kill-word-state parse-state
|
|
'char-before))
|
|
(progn (backward-char 1) nil)))))
|
|
(if (and (eq state 'comment)
|
|
(eq ?\# (char-after (point)))
|
|
(eq ?\| (char-before (point))))
|
|
(backward-char 1)))))
|
|
(backward-kill-word 1))
|
|
|
|
;;;;;; Word-Killing Auxiliaries
|
|
|
|
(defun paredit-kill-word-state (parse-state adjacent-char-fn)
|
|
(cond ((paredit-in-comment-p parse-state) 'comment)
|
|
((paredit-in-string-p parse-state) 'string)
|
|
((memq (char-syntax (funcall adjacent-char-fn))
|
|
'(?\( ?\) ))
|
|
'delimiter)
|
|
(t 'other)))
|
|
|
|
;;; This optionally advances the point past any comment delimiters that
|
|
;;; should probably not be touched, based on the last state change and
|
|
;;; the characters around the point. It returns a new parse state,
|
|
;;; starting from the PARSE-STATE parameter.
|
|
|
|
(defun paredit-kill-word-hack (old-state new-state parse-state)
|
|
(cond ((and (not (eq old-state 'comment))
|
|
(not (eq new-state 'comment))
|
|
(not (paredit-in-string-escape-p))
|
|
(eq ?\# (char-before))
|
|
(eq ?\| (char-after)))
|
|
(forward-char 1)
|
|
(paredit-current-parse-state)
|
|
;; (parse-partial-sexp (point) (1+ (point))
|
|
;; nil nil parse-state)
|
|
)
|
|
((and (not (eq old-state 'comment))
|
|
(eq new-state 'comment)
|
|
(eq ?\; (char-before)))
|
|
(skip-chars-forward ";")
|
|
(paredit-current-parse-state)
|
|
;; (parse-partial-sexp (point) (save-excursion
|
|
;; (skip-chars-forward ";"))
|
|
;; nil nil parse-state)
|
|
)
|
|
(t parse-state)))
|
|
|
|
(defun paredit-copy-as-kill ()
|
|
"Save in the kill ring the region that `paredit-kill' would kill."
|
|
(interactive)
|
|
(cond ((paredit-in-string-p)
|
|
(paredit-copy-as-kill-in-string))
|
|
((paredit-in-comment-p)
|
|
(copy-region-as-kill (point) (point-at-eol)))
|
|
((save-excursion (paredit-skip-whitespace t (point-at-eol))
|
|
(or (eolp) (eq (char-after) ?\; )))
|
|
;** Be careful about trailing backslashes.
|
|
(save-excursion
|
|
(if (paredit-in-char-p)
|
|
(backward-char))
|
|
(copy-region-as-kill (point) (point-at-eol))))
|
|
(t (paredit-copy-sexps-as-kill))))
|
|
|
|
(defun paredit-copy-as-kill-in-string ()
|
|
(save-excursion
|
|
(if (paredit-in-string-escape-p)
|
|
(backward-char))
|
|
(copy-region-as-kill (point)
|
|
(min (point-at-eol)
|
|
(cdr (paredit-string-start+end-points))))))
|
|
|
|
(defun paredit-copy-sexps-as-kill ()
|
|
(save-excursion
|
|
(if (paredit-in-char-p)
|
|
(backward-char 2))
|
|
(let ((beginning (point))
|
|
(eol (point-at-eol)))
|
|
(let ((end-of-list-p (paredit-forward-sexps-to-kill beginning eol)))
|
|
(if end-of-list-p (progn (up-list) (backward-char)))
|
|
(copy-region-as-kill beginning
|
|
(cond (kill-whole-line
|
|
(or (save-excursion
|
|
(paredit-skip-whitespace t)
|
|
(and (not (eq (char-after) ?\; ))
|
|
(point)))
|
|
(point-at-eol)))
|
|
((and (not end-of-list-p)
|
|
(eq (point-at-eol) eol))
|
|
eol)
|
|
(t
|
|
(point))))))))
|
|
|
|
;;;; Deleting Regions
|
|
|
|
(defun paredit-delete-region (start end)
|
|
"Delete the text between point and mark, like `delete-region'.
|
|
If that text is unbalanced, signal an error instead.
|
|
With a prefix argument, skip the balance check."
|
|
(interactive "r")
|
|
(if (and start end (not current-prefix-arg))
|
|
(paredit-check-region-for-delete start end))
|
|
(setq this-command 'delete-region)
|
|
(delete-region start end))
|
|
|
|
(defun paredit-kill-region (start end)
|
|
"Kill the text between point and mark, like `kill-region'.
|
|
If that text is unbalanced, signal an error instead.
|
|
With a prefix argument, skip the balance check."
|
|
(interactive "r")
|
|
(if (and start end (not current-prefix-arg))
|
|
(paredit-check-region-for-delete start end))
|
|
(setq this-command 'kill-region)
|
|
(kill-region start end))
|
|
|
|
(defun paredit-check-region-for-delete (start end)
|
|
"Signal an error deleting text between START and END is unsafe."
|
|
(save-excursion
|
|
(goto-char start)
|
|
(let* ((start-state (paredit-current-parse-state))
|
|
(end-state (parse-partial-sexp start end nil nil start-state)))
|
|
(paredit-check-region-for-delete:depth start start-state end end-state)
|
|
(paredit-check-region-for-delete:string start start-state end end-state)
|
|
(paredit-check-region-for-delete:comment start start-state end end-state)
|
|
(paredit-check-region-for-delete:char-quote start start-state
|
|
end end-state))))
|
|
|
|
(defun paredit-check-region-for-delete:depth (start start-state end end-state)
|
|
(let ((start-depth (nth 0 start-state))
|
|
(end-depth (nth 0 end-state)))
|
|
(if (not (= start-depth end-depth))
|
|
(error "Mismatched parenthesis depth: %S at start, %S at end."
|
|
start-depth
|
|
end-depth))))
|
|
|
|
(defun paredit-check-region-for-delete:string (start start-state end end-state)
|
|
(let ((start-string-p (nth 3 start-state))
|
|
(end-string-p (nth 3 end-state)))
|
|
(if (not (eq start-string-p end-string-p))
|
|
(error "Mismatched string state: start %sin string, end %sin string."
|
|
(if start-string-p "" "not ")
|
|
(if end-string-p "" "not ")))))
|
|
|
|
(defun paredit-check-region-for-delete:comment
|
|
(start start-state end end-state)
|
|
(let ((start-comment-state (nth 4 start-state))
|
|
(end-comment-state (nth 4 end-state)))
|
|
(if (not (or (eq start-comment-state end-comment-state)
|
|
;; If we are moving text into or out of a line
|
|
;; comment, make sure that the text is balanced. (The
|
|
;; comment state may be a number, not t or nil at all,
|
|
;; for nestable comments, which are not handled by
|
|
;; this heuristic (or any of paredit, really).)
|
|
(and (or (and (eq start-comment-state nil)
|
|
(eq end-comment-state t))
|
|
(and (eq start-comment-state t)
|
|
(eq end-comment-state nil)))
|
|
(save-excursion
|
|
(goto-char end)
|
|
(paredit-region-ok-p (point) (point-at-eol))))))
|
|
(error "Mismatched comment state: %s"
|
|
(cond ((and (integerp start-comment-state)
|
|
(integerp end-comment-state))
|
|
(format "depth %S at start, depth %S at end."
|
|
start-comment-state
|
|
end-comment-state))
|
|
((integerp start-comment-state)
|
|
"start in nested comment, end otherwise.")
|
|
((integerp end-comment-state)
|
|
"end in nested comment, start otherwise.")
|
|
(start-comment-state
|
|
"start in comment, end not in comment.")
|
|
(end-comment-state
|
|
"end in comment, start not in comment.")
|
|
(t
|
|
(format "start %S, end %S."
|
|
start-comment-state
|
|
end-comment-state)))))))
|
|
|
|
(defun paredit-check-region-for-delete:char-quote
|
|
(start start-state end end-state)
|
|
(let ((start-char-quote (nth 5 start-state))
|
|
(end-char-quote (nth 5 end-state)))
|
|
(if (not (eq start-char-quote end-char-quote))
|
|
(let ((phrase "character quotation"))
|
|
(error "Mismatched %s: start %sin %s, end %sin %s."
|
|
phrase
|
|
(if start-char-quote "" "not ")
|
|
phrase
|
|
(if end-char-quote "" "not ")
|
|
phrase)))))
|
|
|
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;;;; Point Motion
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(eval-and-compile
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(defmacro defun-motion (name bvl doc &rest body)
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`(defun ,name ,bvl
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,doc
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,(xcond ((paredit-xemacs-p)
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'(interactive "_"))
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((paredit-gnu-emacs-p)
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;++ Not sure this is sufficient for the `^'.
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(if (fboundp 'handle-shift-selection)
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'(interactive "^p")
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'(interactive "p"))))
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,@body)))
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(defun-motion paredit-forward (&optional arg)
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"Move forward an S-expression, or up an S-expression forward.
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If there are no more S-expressions in this one before the closing
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delimiter, move past that closing delimiter; otherwise, move forward
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past the S-expression following the point."
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(let ((n (or arg 1)))
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(cond ((< 0 n) (dotimes (i n) (paredit-move-forward)))
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((< n 0) (dotimes (i (- n)) (paredit-move-backward))))))
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(defun-motion paredit-backward (&optional arg)
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"Move backward an S-expression, or up an S-expression backward.
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If there are no more S-expressions in this one before the opening
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delimiter, move past that opening delimiter backward; otherwise, move
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move backward past the S-expression preceding the point."
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(let ((n (or arg 1)))
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(cond ((< 0 n) (dotimes (i n) (paredit-move-backward)))
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((< n 0) (dotimes (i (- n)) (paredit-move-forward))))))
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(defun paredit-move-forward ()
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(cond ((paredit-in-string-p)
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(let ((end (paredit-enclosing-string-end)))
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;; `forward-sexp' and `up-list' may move into the next string
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;; in the buffer. Don't do that; move out of the current one.
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(if (paredit-handle-sexp-errors
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(progn (paredit-handle-sexp-errors (forward-sexp)
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(up-list))
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(<= end (point)))
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t)
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(goto-char end))))
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((paredit-in-char-p)
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(forward-char))
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(t
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(paredit-handle-sexp-errors (forward-sexp)
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(up-list)))))
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(defun paredit-move-backward ()
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(cond ((paredit-in-string-p)
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(let ((start (paredit-enclosing-string-start)))
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(if (paredit-handle-sexp-errors
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(progn (paredit-handle-sexp-errors (backward-sexp)
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(backward-up-list))
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(<= (point) start))
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t)
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(goto-char start))))
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((paredit-in-char-p)
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;++ Corner case: a buffer of `\|x'. What to do?
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(backward-char 2))
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(t
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(paredit-handle-sexp-errors (backward-sexp)
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(backward-up-list)))))
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;;;; Window Positioning
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(defalias 'paredit-recentre-on-sexp 'paredit-recenter-on-sexp)
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(defun paredit-recenter-on-sexp (&optional n)
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"Recenter the screen on the S-expression following the point.
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With a prefix argument N, encompass all N S-expressions forward."
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(interactive "P")
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(let* ((p (point))
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(end-point (progn (forward-sexp n) (point)))
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(start-point (progn (goto-char end-point) (backward-sexp n) (point))))
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;; Point is at beginning of first S-expression.
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(let ((p-visible nil) (start-visible nil))
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(save-excursion
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(forward-line (/ (count-lines start-point end-point) 2))
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(recenter)
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(setq p-visible (pos-visible-in-window-p p))
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(setq start-visible (pos-visible-in-window-p start-point)))
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(cond ((not start-visible)
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;; Implies (not p-visible). Put the start at the top of
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;; the screen.
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(recenter 0))
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(p-visible
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;; Go back to p if we can.
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(goto-char p))))))
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(defun paredit-recenter-on-defun ()
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"Recenter the screen on the definition at point."
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(interactive)
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(save-excursion
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(beginning-of-defun)
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(paredit-recenter-on-sexp)))
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(defun paredit-focus-on-defun ()
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"Moves display to the top of the definition at point."
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(interactive)
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(beginning-of-defun)
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(recenter 0))
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;;;; Generalized Upward/Downward Motion
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(defun paredit-up/down (n vertical-direction)
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(let ((horizontal-direction (if (< 0 n) +1 -1)))
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(while (/= n 0)
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(goto-char
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(paredit-next-up/down-point horizontal-direction vertical-direction))
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(setq n (- n horizontal-direction)))))
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(defun paredit-next-up/down-point (horizontal-direction vertical-direction)
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(let ((state (paredit-current-parse-state))
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(scan-lists
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(lambda ()
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(scan-lists (point) horizontal-direction vertical-direction))))
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(cond ((paredit-in-string-p state)
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(let ((start+end (paredit-string-start+end-points state)))
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(if (< 0 vertical-direction)
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(if (< 0 horizontal-direction)
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(+ 1 (cdr start+end))
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(car start+end))
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;; We could let the user try to descend into lists
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;; within the string, but that would be asymmetric
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;; with the up case, which rises out of the whole
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;; string and not just out of a list within the
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;; string, so this case will just be an error.
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(error "Can't descend further into string."))))
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((< 0 vertical-direction)
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;; When moving up, just try to rise up out of the list.
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(or (funcall scan-lists)
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(buffer-end horizontal-direction)))
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((< vertical-direction 0)
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;; When moving down, look for a string closer than a list,
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;; and use that if we find it.
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(let* ((list-start
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(paredit-handle-sexp-errors (funcall scan-lists) nil))
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(string-start
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(paredit-find-next-string-start horizontal-direction
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list-start)))
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(if (and string-start list-start)
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(if (< 0 horizontal-direction)
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(min string-start list-start)
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(max string-start list-start))
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(or string-start
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;; Scan again: this is a kludgey way to report the
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;; error if there really was one.
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(funcall scan-lists)
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(buffer-end horizontal-direction)))))
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(t
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(error "Vertical direction must be nonzero in `%s'."
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'paredit-up/down)))))
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(defun paredit-find-next-string-start (horizontal-direction limit)
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(let ((buffer-limit-p (if (< 0 horizontal-direction) 'eobp 'bobp))
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(next-char (if (< 0 horizontal-direction) 'char-after 'char-before))
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(pastp (if (< 0 horizontal-direction) '> '<)))
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(paredit-handle-sexp-errors
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(save-excursion
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(catch 'exit
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(while t
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(if (or (funcall buffer-limit-p)
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(and limit (funcall pastp (point) limit)))
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(throw 'exit nil))
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(forward-sexp horizontal-direction)
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(save-excursion
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(backward-sexp horizontal-direction)
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(if (eq ?\" (char-syntax (funcall next-char)))
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(throw 'exit (+ (point) horizontal-direction)))))))
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nil)))
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(defun-motion paredit-forward-down (&optional argument)
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"Move forward down into a list.
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With a positive argument, move forward down that many levels.
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With a negative argument, move backward down that many levels."
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(paredit-up/down (or argument +1) -1))
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(defun-motion paredit-backward-up (&optional argument)
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"Move backward up out of the enclosing list.
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With a positive argument, move backward up that many levels.
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With a negative argument, move forward up that many levels.
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If in a string initially, that counts as one level."
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(paredit-up/down (- 0 (or argument +1)) +1))
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(defun-motion paredit-forward-up (&optional argument)
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"Move forward up out of the enclosing list.
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With a positive argument, move forward up that many levels.
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With a negative argument, move backward up that many levels.
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If in a string initially, that counts as one level."
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(paredit-up/down (or argument +1) +1))
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(defun-motion paredit-backward-down (&optional argument)
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"Move backward down into a list.
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With a positive argument, move backward down that many levels.
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With a negative argument, move forward down that many levels."
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(paredit-up/down (- 0 (or argument +1)) -1))
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;;;; Depth-Changing Commands: Wrapping, Splicing, & Raising
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(defun paredit-wrap-sexp (&optional argument open close)
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"Wrap the following S-expression.
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If a `C-u' prefix argument is given, wrap all S-expressions following
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the point until the end of the buffer or of the enclosing list.
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If a numeric prefix argument N is given, wrap N S-expressions.
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Automatically indent the newly wrapped S-expression.
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As a special case, if the point is at the end of a list, simply insert
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a parenthesis pair, rather than inserting a lone opening delimiter
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and then signalling an error, in the interest of preserving
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structure.
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By default OPEN and CLOSE are round delimiters."
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(interactive "P")
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(paredit-lose-if-not-in-sexp 'paredit-wrap-sexp)
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(let ((open (or open ?\( ))
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(close (or close ?\) )))
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(paredit-handle-sexp-errors
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((lambda (n) (paredit-insert-pair n open close 'goto-char))
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(cond ((integerp argument) argument)
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((consp argument) (paredit-count-sexps-forward))
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((paredit-region-active-p) nil)
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(t 1)))
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(insert close)
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(backward-char)))
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(save-excursion (backward-up-list) (indent-sexp)))
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(defun paredit-yank-pop (&optional argument)
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"Replace just-yanked text with the next item in the kill ring.
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If this command follows a `yank', just run `yank-pop'.
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If this command follows a `paredit-wrap-sexp', or any other paredit
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wrapping command (see `paredit-wrap-commands'), run `yank' and
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reindent the enclosing S-expression.
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If this command is repeated, run `yank-pop' and reindent the enclosing
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S-expression.
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The argument is passed on to `yank' or `yank-pop'; see their
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documentation for details."
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(interactive "*p")
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(cond ((eq last-command 'yank)
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(yank-pop argument))
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((memq last-command paredit-wrap-commands)
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(yank argument)
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;; `yank' futzes with `this-command'.
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(setq this-command 'paredit-yank-pop)
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(save-excursion (backward-up-list) (indent-sexp)))
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((eq last-command 'paredit-yank-pop)
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;; Pretend we just did a `yank', so that we can use
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;; `yank-pop' without duplicating its definition.
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(setq last-command 'yank)
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(yank-pop argument)
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;; Return to our original state.
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(setq last-command 'paredit-yank-pop)
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(setq this-command 'paredit-yank-pop)
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(save-excursion (backward-up-list) (indent-sexp)))
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(t (error "Last command was not a yank or a wrap: %s" last-command))))
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(defun paredit-splice-sexp (&optional argument)
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"Splice the list that the point is on by removing its delimiters.
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With a prefix argument as in `C-u', kill all S-expressions backward in
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the current list before splicing all S-expressions forward into the
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enclosing list.
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With two prefix arguments as in `C-u C-u', kill all S-expressions
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forward in the current list before splicing all S-expressions
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backward into the enclosing list.
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With a numerical prefix argument N, kill N S-expressions backward in
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the current list before splicing the remaining S-expressions into the
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enclosing list. If N is negative, kill forward.
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Inside a string, unescape all backslashes, or signal an error if doing
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so would invalidate the buffer's structure."
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(interactive "P")
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(if (paredit-in-string-p)
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(paredit-splice-string argument)
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(if (paredit-in-comment-p)
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(error "Can't splice comment."))
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(paredit-handle-sexp-errors (paredit-enclosing-list-start)
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(error "Can't splice top level."))
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(paredit-kill-surrounding-sexps-for-splice argument)
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(let ((delete-start (paredit-enclosing-list-start))
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(delete-end
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(let ((limit
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(save-excursion
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(paredit-ignore-sexp-errors (forward-sexp) (backward-sexp))
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(point))))
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(save-excursion
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(backward-up-list)
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(forward-char +1)
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(paredit-skip-whitespace t limit)
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(point)))))
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(let ((end-marker (make-marker)))
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(save-excursion
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(up-list)
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(delete-char -1)
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(set-marker end-marker (point)))
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(delete-region delete-start delete-end)
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(paredit-splice-reindent delete-start (marker-position end-marker))))))
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(defun paredit-splice-reindent (start end)
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(paredit-preserving-column
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;; If we changed the first subform of the enclosing list, we must
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;; reindent the whole enclosing list.
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(if (paredit-handle-sexp-errors
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(save-excursion
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(backward-up-list)
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(down-list)
|
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(paredit-ignore-sexp-errors (forward-sexp))
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(< start (point)))
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nil)
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(save-excursion (backward-up-list) (indent-sexp))
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(paredit-indent-region start end))))
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(defun paredit-kill-surrounding-sexps-for-splice (argument)
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(cond ((or (paredit-in-string-p)
|
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(paredit-in-comment-p))
|
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(error "Invalid context for splicing S-expressions."))
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((or (not argument) (eq argument 0)) nil)
|
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((or (numberp argument) (eq argument '-))
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;; Kill S-expressions before/after the point by saving the
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;; point, moving across them, and killing the region.
|
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(let* ((argument (if (eq argument '-) -1 argument))
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(saved (paredit-point-at-sexp-boundary (- argument))))
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(goto-char saved)
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(paredit-ignore-sexp-errors (backward-sexp argument))
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(paredit-hack-kill-region saved (point))))
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((consp argument)
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(let ((v (car argument)))
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(if (= v 4) ;One `C-u'.
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;; Move backward until we hit the open paren; then
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;; kill that selected region.
|
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(let ((end (point)))
|
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(paredit-ignore-sexp-errors
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(while (not (bobp))
|
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(backward-sexp)))
|
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(paredit-hack-kill-region (point) end))
|
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;; Move forward until we hit the close paren; then
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;; kill that selected region.
|
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(let ((beginning (point)))
|
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(paredit-ignore-sexp-errors
|
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(while (not (eobp))
|
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(forward-sexp)))
|
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(paredit-hack-kill-region beginning (point))))))
|
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(t (error "Bizarre prefix argument `%s'." argument))))
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|
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(defun paredit-splice-sexp-killing-backward (&optional n)
|
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"Splice the list the point is on by removing its delimiters, and
|
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also kill all S-expressions before the point in the current list.
|
|
With a prefix argument N, kill only the preceding N S-expressions."
|
|
(interactive "P")
|
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(paredit-splice-sexp (if n
|
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(prefix-numeric-value n)
|
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'(4))))
|
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|
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(defun paredit-splice-sexp-killing-forward (&optional n)
|
|
"Splice the list the point is on by removing its delimiters, and
|
|
also kill all S-expressions after the point in the current list.
|
|
With a prefix argument N, kill only the following N S-expressions."
|
|
(interactive "P")
|
|
(paredit-splice-sexp (if n
|
|
(- (prefix-numeric-value n))
|
|
'(16))))
|
|
|
|
(defun paredit-raise-sexp (&optional argument)
|
|
"Raise the following S-expression in a tree, deleting its siblings.
|
|
With a prefix argument N, raise the following N S-expressions. If N
|
|
is negative, raise the preceding N S-expressions.
|
|
If the point is on an S-expression, such as a string or a symbol, not
|
|
between them, that S-expression is considered to follow the point."
|
|
(interactive "P")
|
|
(save-excursion
|
|
(cond ((paredit-in-string-p)
|
|
(goto-char (car (paredit-string-start+end-points))))
|
|
((paredit-in-char-p)
|
|
(backward-sexp))
|
|
((paredit-in-comment-p)
|
|
(error "No S-expression to raise in comment.")))
|
|
;; Select the S-expressions we want to raise in a buffer substring.
|
|
(let* ((n (prefix-numeric-value argument))
|
|
(bound (scan-sexps (point) n))
|
|
(sexps
|
|
(if (< n 0)
|
|
(buffer-substring bound (paredit-point-at-sexp-end))
|
|
(buffer-substring (paredit-point-at-sexp-start) bound))))
|
|
;; Move up to the list we're raising those S-expressions out of and
|
|
;; delete it.
|
|
(backward-up-list)
|
|
(delete-region (point) (scan-sexps (point) 1))
|
|
(let* ((indent-start (point))
|
|
(indent-end (save-excursion (insert sexps) (point))))
|
|
;; If the expression spans multiple lines, its indentation is
|
|
;; probably broken, so reindent it -- but don't reindent
|
|
;; anything that we didn't touch outside the expression.
|
|
;;
|
|
;; XXX What if the *column* of the starting point was preserved
|
|
;; too? Should we avoid reindenting in that case?
|
|
(if (not (eq (save-excursion (goto-char indent-start) (point-at-eol))
|
|
(save-excursion (goto-char indent-end) (point-at-eol))))
|
|
(indent-region indent-start indent-end nil))))))
|
|
|
|
;;; The effects of convolution on the surrounding whitespace are pretty
|
|
;;; random. If you have better suggestions, please let me know.
|
|
|
|
(defun paredit-convolute-sexp (&optional n)
|
|
"Convolute S-expressions.
|
|
Save the S-expressions preceding point and delete them.
|
|
Splice the S-expressions following point.
|
|
Wrap the enclosing list in a new list prefixed by the saved text.
|
|
With a prefix argument N, move up N lists before wrapping."
|
|
(interactive "p")
|
|
(paredit-lose-if-not-in-sexp 'paredit-convolute-sexp)
|
|
;; Make sure we can move up before destroying anything.
|
|
(save-excursion (backward-up-list n) (backward-up-list))
|
|
(let (open close) ;++ Is this a good idea?
|
|
(let ((prefix
|
|
(let ((end (point)))
|
|
(paredit-ignore-sexp-errors
|
|
(while (not (bobp)) (backward-sexp)))
|
|
(prog1 (buffer-substring (point) end)
|
|
(backward-up-list)
|
|
(save-excursion (forward-sexp)
|
|
(setq close (char-before))
|
|
(delete-char -1))
|
|
(setq open (char-after))
|
|
(delete-region (point) end)
|
|
;; I'm not sure this makes sense...
|
|
(if (not (eolp)) (just-one-space))))))
|
|
(backward-up-list n)
|
|
(paredit-insert-pair 1 open close 'goto-char)
|
|
(insert prefix)
|
|
;; I'm not sure this makes sense either...
|
|
(if (not (eolp)) (just-one-space))
|
|
(save-excursion
|
|
(backward-up-list)
|
|
(paredit-ignore-sexp-errors (indent-sexp))))))
|
|
|
|
(defun paredit-splice-string (argument)
|
|
(let ((original-point (point))
|
|
(start+end (paredit-string-start+end-points)))
|
|
(let ((start (car start+end))
|
|
(end (cdr start+end)))
|
|
;; START and END both lie before the respective quote
|
|
;; characters, which we want to delete; thus we increment START
|
|
;; by one to extract the string, and we increment END by one to
|
|
;; delete the string.
|
|
(let* ((escaped-string
|
|
(cond ((not (consp argument))
|
|
(buffer-substring (1+ start) end))
|
|
((= 4 (car argument))
|
|
(buffer-substring original-point end))
|
|
(t
|
|
(buffer-substring (1+ start) original-point))))
|
|
(unescaped-string
|
|
(paredit-unescape-string escaped-string)))
|
|
(if (not unescaped-string)
|
|
(error "Unspliceable string.")
|
|
(save-excursion
|
|
(goto-char start)
|
|
(delete-region start (1+ end))
|
|
(insert unescaped-string))
|
|
(if (not (and (consp argument)
|
|
(= 4 (car argument))))
|
|
(goto-char (- original-point 1))))))))
|
|
|
|
(defun paredit-unescape-string (string)
|
|
(with-temp-buffer
|
|
(insert string)
|
|
(goto-char (point-min))
|
|
(while (and (not (eobp))
|
|
;; nil -> no bound; t -> no errors.
|
|
(search-forward "\\" nil t))
|
|
(delete-char -1)
|
|
(forward-char))
|
|
(paredit-handle-sexp-errors
|
|
(progn (scan-sexps (point-min) (point-max))
|
|
(buffer-string))
|
|
nil)))
|
|
|
|
;;;; Slurpage & Barfage
|
|
|
|
(defun paredit-forward-slurp-sexp (&optional argument)
|
|
"Add the S-expression following the current list into that list
|
|
by moving the closing delimiter.
|
|
Automatically reindent the newly slurped S-expression with respect to
|
|
its new enclosing form.
|
|
If in a string, move the opening double-quote forward by one
|
|
S-expression and escape any intervening characters as necessary,
|
|
without altering any indentation or formatting."
|
|
(interactive "P")
|
|
(save-excursion
|
|
(cond ((paredit-in-comment-p)
|
|
(error "Invalid context for slurping S-expressions."))
|
|
((numberp argument)
|
|
(if (< argument 0)
|
|
(paredit-forward-barf-sexp (- 0 argument))
|
|
(while (< 0 argument)
|
|
(paredit-forward-slurp-sexp)
|
|
(setq argument (- argument 1)))))
|
|
((paredit-in-string-p)
|
|
;; If there is anything to slurp into the string, take that.
|
|
;; Otherwise, try to slurp into the enclosing list.
|
|
(if (save-excursion
|
|
(goto-char (paredit-enclosing-string-end))
|
|
(paredit-handle-sexp-errors (progn (forward-sexp) nil)
|
|
t))
|
|
(progn
|
|
(goto-char (paredit-enclosing-string-end))
|
|
(paredit-forward-slurp-into-list argument))
|
|
(paredit-forward-slurp-into-string argument)))
|
|
(t
|
|
(paredit-forward-slurp-into-list argument)))))
|
|
|
|
(defun paredit-forward-slurp-into-list (&optional argument)
|
|
(let ((nestedp nil))
|
|
(save-excursion
|
|
(up-list) ; Up to the end of the list to
|
|
(let ((close (char-before))) ; save and delete the closing
|
|
(delete-char -1) ; delimiter.
|
|
(let ((start (point)))
|
|
(catch 'return ; Go to the end of the desired
|
|
(while t ; S-expression, going up a
|
|
(paredit-handle-sexp-errors ; list if it's not in this,
|
|
(progn (forward-sexp)
|
|
(if argument
|
|
(paredit-ignore-sexp-errors
|
|
(while (not (eobp))
|
|
(forward-sexp))))
|
|
(throw 'return nil))
|
|
(setq nestedp t)
|
|
(up-list)
|
|
(setq close ; adjusting for mixed
|
|
(prog1 (char-before) ; delimiters as necessary,
|
|
(delete-char -1)
|
|
(insert close))))))
|
|
(insert close) ; to insert that delimiter.
|
|
(indent-region start (point) nil))))
|
|
(if (and (not nestedp)
|
|
(eq (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(save-excursion (backward-up-list) (forward-char) (point)))
|
|
(eq (save-excursion (forward-sexp) (backward-sexp) (point))
|
|
(save-excursion (paredit-skip-whitespace t) (point))))
|
|
(delete-region (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(save-excursion (paredit-skip-whitespace t) (point))))))
|
|
|
|
(defun paredit-forward-slurp-into-string (&optional argument)
|
|
(let ((start (paredit-enclosing-string-start))
|
|
(end (paredit-enclosing-string-end)))
|
|
(goto-char end)
|
|
;; Signal any errors that we might get first, before mucking with
|
|
;; the buffer's contents.
|
|
(save-excursion (forward-sexp))
|
|
(let ((close (char-before)))
|
|
;; Skip intervening whitespace if we're slurping into an empty
|
|
;; string. XXX What about nonempty strings?
|
|
(if (and (= (+ start 2) end)
|
|
(eq (save-excursion (paredit-skip-whitespace t) (point))
|
|
(save-excursion (forward-sexp) (backward-sexp) (point))))
|
|
(delete-region (- (point) 1)
|
|
(save-excursion (paredit-skip-whitespace t) (point)))
|
|
(delete-char -1))
|
|
(paredit-forward-for-quote
|
|
(save-excursion
|
|
(forward-sexp)
|
|
(if argument
|
|
(while (paredit-handle-sexp-errors (progn (forward-sexp) t) nil)))
|
|
(point)))
|
|
(insert close))))
|
|
|
|
(defun paredit-forward-barf-sexp (&optional argument)
|
|
"Remove the last S-expression in the current list from that list
|
|
by moving the closing delimiter.
|
|
Automatically reindent the newly barfed S-expression with respect to
|
|
its new enclosing form."
|
|
(interactive "P")
|
|
(paredit-lose-if-not-in-sexp 'paredit-forward-barf-sexp)
|
|
(if (and (numberp argument) (< argument 0))
|
|
(paredit-forward-slurp-sexp (- 0 argument))
|
|
(let ((start (point)) (end nil))
|
|
(save-excursion
|
|
(up-list) ; Up to the end of the list to
|
|
(let ((close (char-before))) ; save and delete the closing
|
|
(delete-char -1) ; delimiter.
|
|
(setq end (point))
|
|
(paredit-ignore-sexp-errors ; Go back to where we want to
|
|
(if (or (not argument) ; insert the delimiter.
|
|
(numberp argument))
|
|
(backward-sexp argument)
|
|
(while (paredit-handle-sexp-errors
|
|
(save-excursion (backward-sexp) (<= start (point)))
|
|
nil)
|
|
(backward-sexp))))
|
|
(paredit-skip-whitespace nil) ; Skip leading whitespace.
|
|
(cond ((bobp)
|
|
;++ We'll have deleted the close, but there's no open.
|
|
;++ Is that OK?
|
|
(error "Barfing all subexpressions with no open-paren?"))
|
|
((paredit-in-comment-p) ; Don't put the close-paren in
|
|
(newline))) ; a comment.
|
|
(insert close))
|
|
;; Reindent all of the newly barfed S-expressions. Start at the
|
|
;; start of the first barfed S-expression, not at the close we
|
|
;; just inserted.
|
|
(forward-sexp)
|
|
(backward-sexp)
|
|
(if (or (not argument) (numberp argument))
|
|
(paredit-forward-and-indent argument)
|
|
(indent-region (point) end))))))
|
|
|
|
(defun paredit-backward-slurp-sexp (&optional argument)
|
|
"Add the S-expression preceding the current list into that list
|
|
by moving the closing delimiter.
|
|
Automatically reindent the whole form into which new S-expression was
|
|
slurped.
|
|
If in a string, move the opening double-quote backward by one
|
|
S-expression and escape any intervening characters as necessary,
|
|
without altering any indentation or formatting."
|
|
(interactive "P")
|
|
(save-excursion
|
|
(cond ((paredit-in-comment-p)
|
|
(error "Invalid context for slurping S-expressions."))
|
|
((numberp argument)
|
|
(if (< argument 0)
|
|
(paredit-backward-barf-sexp (- 0 argument))
|
|
(while (< 0 argument)
|
|
(paredit-backward-slurp-sexp)
|
|
(setq argument (- argument 1)))))
|
|
((paredit-in-string-p)
|
|
;; If there is anything to slurp into the string, take that.
|
|
;; Otherwise, try to slurp into the enclosing list.
|
|
(if (save-excursion
|
|
(goto-char (paredit-enclosing-string-start))
|
|
(paredit-handle-sexp-errors (progn (backward-sexp) nil)
|
|
t))
|
|
(progn
|
|
(goto-char (paredit-enclosing-string-start))
|
|
(paredit-backward-slurp-into-list argument))
|
|
(paredit-backward-slurp-into-string argument)))
|
|
(t
|
|
(paredit-backward-slurp-into-list argument)))))
|
|
|
|
(defun paredit-backward-slurp-into-list (&optional argument)
|
|
(let ((nestedp nil))
|
|
(save-excursion
|
|
(backward-up-list)
|
|
(let ((open (char-after)))
|
|
(delete-char +1)
|
|
(catch 'return
|
|
(while t
|
|
(paredit-handle-sexp-errors
|
|
(progn (backward-sexp)
|
|
(if argument
|
|
(paredit-ignore-sexp-errors
|
|
(while (not (bobp))
|
|
(backward-sexp))))
|
|
(throw 'return nil))
|
|
(setq nestedp t)
|
|
(backward-up-list)
|
|
(setq open
|
|
(prog1 (char-after)
|
|
(save-excursion (insert open) (delete-char +1)))))))
|
|
(insert open))
|
|
;; Reindent the line at the beginning of wherever we inserted the
|
|
;; opening delimiter, and then indent the whole S-expression.
|
|
(backward-up-list)
|
|
(lisp-indent-line)
|
|
(indent-sexp))
|
|
;; If we slurped into an empty list, don't leave dangling space:
|
|
;; (foo |).
|
|
(if (and (not nestedp)
|
|
(eq (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(save-excursion (backward-sexp) (forward-sexp) (point)))
|
|
(eq (save-excursion (up-list) (backward-char) (point))
|
|
(save-excursion (paredit-skip-whitespace t) (point))))
|
|
(delete-region (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(save-excursion (paredit-skip-whitespace t) (point))))))
|
|
|
|
(defun paredit-backward-slurp-into-string (&optional argument)
|
|
(let ((start (paredit-enclosing-string-start))
|
|
(end (paredit-enclosing-string-end)))
|
|
(goto-char start)
|
|
;; Signal any errors that we might get first, before mucking with
|
|
;; the buffer's contents.
|
|
(save-excursion (backward-sexp))
|
|
(let ((open (char-after))
|
|
(target (point)))
|
|
;; Skip intervening whitespace if we're slurping into an empty
|
|
;; string. XXX What about nonempty strings?
|
|
(if (and (= (+ start 2) end)
|
|
(eq (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(save-excursion (backward-sexp) (forward-sexp) (point))))
|
|
(delete-region (save-excursion (paredit-skip-whitespace nil) (point))
|
|
(+ (point) 1))
|
|
(delete-char +1))
|
|
(backward-sexp)
|
|
(if argument
|
|
(paredit-ignore-sexp-errors
|
|
(while (not (bobp))
|
|
(backward-sexp))))
|
|
(insert open)
|
|
(paredit-forward-for-quote target))))
|
|
|
|
(defun paredit-backward-barf-sexp (&optional argument)
|
|
"Remove the first S-expression in the current list from that list
|
|
by moving the closing delimiter.
|
|
Automatically reindent the barfed S-expression and the form from which
|
|
it was barfed."
|
|
(interactive "P")
|
|
(paredit-lose-if-not-in-sexp 'paredit-backward-barf-sexp)
|
|
(if (and (numberp argument) (< argument 0))
|
|
(paredit-backward-slurp-sexp (- 0 argument))
|
|
(let ((end (make-marker)))
|
|
(set-marker end (point))
|
|
(save-excursion
|
|
(backward-up-list)
|
|
(let ((open (char-after)))
|
|
(delete-char +1)
|
|
(paredit-ignore-sexp-errors
|
|
(paredit-forward-and-indent
|
|
(if (or (not argument) (numberp argument))
|
|
argument
|
|
(let ((n 0))
|
|
(save-excursion
|
|
(while (paredit-handle-sexp-errors
|
|
(save-excursion
|
|
(forward-sexp)
|
|
(<= (point) end))
|
|
nil)
|
|
(forward-sexp)
|
|
(setq n (+ n 1))))
|
|
n))))
|
|
(while (progn (paredit-skip-whitespace t) (eq (char-after) ?\; ))
|
|
(forward-line 1))
|
|
(if (eobp)
|
|
;++ We'll have deleted the close, but there's no open.
|
|
;++ Is that OK?
|
|
(error "Barfing all subexpressions with no close-paren?"))
|
|
;** Don't use `insert' here. Consider, e.g., barfing from
|
|
;** (foo|)
|
|
;** and how `save-excursion' works.
|
|
(insert-before-markers open))
|
|
(backward-up-list)
|
|
(lisp-indent-line)
|
|
(indent-sexp)))))
|
|
|
|
;;;; Splitting & Joining
|
|
|
|
(defun paredit-split-sexp ()
|
|
"Split the list or string the point is on into two."
|
|
(interactive)
|
|
(cond ((paredit-in-string-p)
|
|
(insert "\"")
|
|
(save-excursion (insert " \"")))
|
|
((or (paredit-in-comment-p)
|
|
(paredit-in-char-p))
|
|
(error "Invalid context for splitting S-expression."))
|
|
(t
|
|
(let ((open (save-excursion (backward-up-list) (char-after)))
|
|
(close (save-excursion (up-list) (char-before))))
|
|
(delete-horizontal-space)
|
|
(insert close)
|
|
(save-excursion
|
|
(insert ?\ )
|
|
(insert open)
|
|
(backward-char)
|
|
(indent-sexp))))))
|
|
|
|
(defun paredit-join-sexps ()
|
|
"Join the S-expressions adjacent on either side of the point.
|
|
Both must be lists, strings, or atoms; error if there is a mismatch."
|
|
(interactive)
|
|
(cond ((paredit-in-comment-p) (error "Can't join S-expressions in comment."))
|
|
((paredit-in-string-p) (error "Nothing to join in a string."))
|
|
((paredit-in-char-p) (error "Can't join characters.")))
|
|
(let ((left-point (paredit-point-at-sexp-end))
|
|
(right-point (paredit-point-at-sexp-start)))
|
|
(let ((left-char (char-before left-point))
|
|
(right-char (char-after right-point)))
|
|
(let ((left-syntax (char-syntax left-char))
|
|
(right-syntax (char-syntax right-char)))
|
|
(cond ((< right-point left-point)
|
|
(error "Can't join a datum with itself."))
|
|
((and (eq left-syntax ?\) )
|
|
(eq right-syntax ?\( )
|
|
(eq left-char (matching-paren right-char))
|
|
(eq right-char (matching-paren left-char)))
|
|
(paredit-join-lists-internal left-point right-point)
|
|
(paredit-preserving-column
|
|
(save-excursion
|
|
(backward-up-list)
|
|
(indent-sexp))))
|
|
((and (eq left-syntax ?\" )
|
|
(eq right-syntax ?\" ))
|
|
;; Delete any intermediate formatting.
|
|
(delete-region (1- left-point) (1+ right-point)))
|
|
((and (memq left-syntax '(?w ?_)) ; Word or symbol
|
|
(memq right-syntax '(?w ?_)))
|
|
(delete-region left-point right-point))
|
|
(t (error "Mismatched S-expressions to join.")))))))
|
|
|
|
(defun paredit-join-lists-internal (left-point right-point)
|
|
(save-excursion
|
|
;; Leave intermediate formatting alone.
|
|
(goto-char right-point)
|
|
(delete-char +1)
|
|
(goto-char left-point)
|
|
(delete-char -1)
|
|
;; Kludge: Add an extra space in several conditions.
|
|
(if (or
|
|
;; (foo)| ;x\n(bar) => (foo | ;x\nbar), not (foo| ;x\nbar).
|
|
(and (not (eolp))
|
|
(save-excursion
|
|
(paredit-skip-whitespace t (point-at-eol))
|
|
(eq (char-after) ?\;)))
|
|
;; (foo)|(bar) => (foo| bar), not (foo|bar).
|
|
(and (= left-point right-point)
|
|
(not (or (eq ?\ (char-syntax (char-before)))
|
|
(eq ?\ (char-syntax (char-after)))))))
|
|
(insert ?\ ))))
|
|
|
|
;++ How ought paredit-join to handle comments intervening symbols or strings?
|
|
;++ Idea:
|
|
;++
|
|
;++ "foo" | ;bar
|
|
;++ "baz" ;quux
|
|
;++
|
|
;++ =>
|
|
;++
|
|
;++ "foo|baz" ;bar
|
|
;++ ;quux
|
|
;++
|
|
;++ The point should stay where it is relative to the comments, and the
|
|
;++ the comments' columns should all be preserved, perhaps. Hmmmm...
|
|
;++ What about this?
|
|
;++
|
|
;++ "foo" ;bar
|
|
;++ | ;baz
|
|
;++ "quux" ;zot
|
|
|
|
;++ Should rename:
|
|
;++ paredit-point-at-sexp-start -> paredit-start-of-sexp-after-point
|
|
;++ paredit-point-at-sexp-end -> paredit-end-of-sexp-before-point
|
|
|
|
;;;; Variations on the Lurid Theme
|
|
|
|
;;; I haven't the imagination to concoct clever names for these.
|
|
|
|
(defun paredit-add-to-previous-list ()
|
|
"Add the S-expression following point to the list preceding point."
|
|
(interactive)
|
|
(paredit-lose-if-not-in-sexp 'paredit-add-to-previous-list)
|
|
(save-excursion
|
|
(down-list -1) ;++ backward-down-list...
|
|
(paredit-forward-slurp-sexp)))
|
|
|
|
(defun paredit-add-to-next-list ()
|
|
"Add the S-expression preceding point to the list following point.
|
|
If no S-expression precedes point, move up the tree until one does."
|
|
(interactive)
|
|
(paredit-lose-if-not-in-sexp 'paredit-add-to-next-list)
|
|
(save-excursion
|
|
(down-list)
|
|
(paredit-backward-slurp-sexp)))
|
|
|
|
(defun paredit-join-with-previous-list ()
|
|
"Join the list the point is on with the previous list in the buffer."
|
|
(interactive)
|
|
(paredit-lose-if-not-in-sexp 'paredit-join-with-previous-list)
|
|
(save-excursion
|
|
(while (paredit-handle-sexp-errors (save-excursion (backward-sexp) nil)
|
|
(backward-up-list)
|
|
t))
|
|
(paredit-join-sexps)))
|
|
|
|
(defun paredit-join-with-next-list ()
|
|
"Join the list the point is on with the next list in the buffer."
|
|
(interactive)
|
|
(paredit-lose-if-not-in-sexp 'paredit-join-with-next-list)
|
|
(save-excursion
|
|
(while (paredit-handle-sexp-errors (save-excursion (forward-sexp) nil)
|
|
(up-list)
|
|
t))
|
|
(paredit-join-sexps)))
|
|
|
|
;;;; Utilities
|
|
|
|
(defun paredit-in-string-escape-p ()
|
|
"True if the point is on a character escape of a string.
|
|
This is true only if the character is preceded by an odd number of
|
|
backslashes.
|
|
This assumes that `paredit-in-string-p' has already returned true."
|
|
(let ((oddp nil))
|
|
(save-excursion
|
|
(while (eq (char-before) ?\\ )
|
|
(setq oddp (not oddp))
|
|
(backward-char)))
|
|
oddp))
|
|
|
|
(defun paredit-in-char-p (&optional position)
|
|
"True if point is on a character escape outside a string."
|
|
(save-excursion
|
|
(goto-char (or position (point)))
|
|
(paredit-in-string-escape-p)))
|
|
|
|
(defun paredit-skip-whitespace (trailing-p &optional limit)
|
|
"Skip past any whitespace, or until the point LIMIT is reached.
|
|
If TRAILING-P is nil, skip leading whitespace; otherwise, skip trailing
|
|
whitespace."
|
|
(funcall (if trailing-p 'skip-chars-forward 'skip-chars-backward)
|
|
" \t\n " ; This should skip using the syntax table, but LF
|
|
limit)) ; is a comment end, not newline, in Lisp mode.
|
|
|
|
(defalias 'paredit-region-active-p
|
|
(xcond ((paredit-xemacs-p) 'region-active-p)
|
|
((paredit-gnu-emacs-p)
|
|
(lambda ()
|
|
(and mark-active transient-mark-mode)))))
|
|
|
|
(defun paredit-hack-kill-region (start end)
|
|
"Kill the region between START and END.
|
|
Do not append to any current kill, and
|
|
do not let the next kill append to this one."
|
|
(interactive "r") ;Eh, why not?
|
|
;; KILL-REGION sets THIS-COMMAND to tell the next kill that the last
|
|
;; command was a kill. It also checks LAST-COMMAND to see whether it
|
|
;; should append. If we bind these locally, any modifications to
|
|
;; THIS-COMMAND will be masked, and it will not see LAST-COMMAND to
|
|
;; indicate that it should append.
|
|
(let ((this-command nil)
|
|
(last-command nil))
|
|
(kill-region start end)))
|
|
|
|
;;;;; Reindentation utilities
|
|
|
|
;++ Should `paredit-indent-sexps' and `paredit-forward-and-indent' use
|
|
;++ `paredit-indent-region' rather than `indent-region'?
|
|
|
|
(defun paredit-indent-sexps ()
|
|
"If in a list, indent all following S-expressions in the list."
|
|
(let* ((start (point))
|
|
(end (paredit-handle-sexp-errors (progn (up-list) (point)) nil)))
|
|
(if end
|
|
(indent-region start end nil))))
|
|
|
|
(defun paredit-forward-and-indent (&optional n)
|
|
"Move forward by N S-expressions, indenting them with `indent-region'."
|
|
(let ((start (point)))
|
|
(forward-sexp n)
|
|
(indent-region start (point) nil)))
|
|
|
|
(defun paredit-indent-region (start end)
|
|
"Indent the region from START to END.
|
|
Don't reindent the line starting at START, however."
|
|
(if (not (<= start end))
|
|
(error "Incorrectly related points: %S, %S" start end))
|
|
(save-excursion
|
|
(goto-char start)
|
|
(let ((bol (point-at-bol)))
|
|
;; Skip all S-expressions that end on the starting line, but
|
|
;; don't go past `end'.
|
|
(if (and (save-excursion (goto-char end) (not (eq bol (point-at-bol))))
|
|
(paredit-handle-sexp-errors
|
|
(catch 'exit
|
|
(while t
|
|
(save-excursion
|
|
(forward-sexp)
|
|
(if (not (eq bol (point-at-bol)))
|
|
(throw 'exit t))
|
|
(if (not (< (point) end))
|
|
(throw 'exit nil)))
|
|
(forward-sexp)))
|
|
nil))
|
|
(progn
|
|
;; Point is still on the same line, but precedes an
|
|
;; S-expression that ends on a different line.
|
|
(if (not (eq bol (point-at-bol)))
|
|
(error "Internal error -- we moved forward a line!"))
|
|
(goto-char (+ 1 (point-at-eol)))
|
|
(if (not (<= (point) end))
|
|
(error "Internal error -- we frobnitzed the garfnut!"))
|
|
(indent-region (point) end nil))))))
|
|
|
|
;;;;; S-expression Parsing Utilities
|
|
|
|
;++ These routines redundantly traverse S-expressions a great deal.
|
|
;++ If performance issues arise, this whole section will probably have
|
|
;++ to be refactored to preserve the state longer, like paredit.scm
|
|
;++ does, rather than to traverse the definition N times for every key
|
|
;++ stroke as it presently does.
|
|
|
|
(defun paredit-current-parse-state ()
|
|
"Return parse state of point from beginning of defun."
|
|
(let ((point (point)))
|
|
(beginning-of-defun)
|
|
;; Calling PARSE-PARTIAL-SEXP will advance the point to its second
|
|
;; argument (unless parsing stops due to an error, but we assume it
|
|
;; won't in paredit-mode).
|
|
(parse-partial-sexp (point) point)))
|
|
|
|
(defun paredit-in-string-p (&optional state)
|
|
"True if the parse state is within a double-quote-delimited string.
|
|
If no parse state is supplied, compute one from the beginning of the
|
|
defun to the point."
|
|
;; 3. non-nil if inside a string (the terminator character, really)
|
|
(and (nth 3 (or state (paredit-current-parse-state)))
|
|
t))
|
|
|
|
(defun paredit-string-start+end-points (&optional state)
|
|
"Return a cons of the points of open and close quotes of the string.
|
|
The string is determined from the parse state STATE, or the parse state
|
|
from the beginning of the defun to the point.
|
|
This assumes that `paredit-in-string-p' has already returned true, i.e.
|
|
that the point is already within a string."
|
|
(save-excursion
|
|
;; 8. character address of start of comment or string; nil if not
|
|
;; in one
|
|
(let ((start (nth 8 (or state (paredit-current-parse-state)))))
|
|
(goto-char start)
|
|
(forward-sexp 1)
|
|
(cons start (1- (point))))))
|
|
|
|
(defun paredit-enclosing-string-start ()
|
|
(car (paredit-string-start+end-points)))
|
|
|
|
(defun paredit-enclosing-string-end ()
|
|
(+ 1 (cdr (paredit-string-start+end-points))))
|
|
|
|
(defun paredit-enclosing-list-start ()
|
|
(save-excursion
|
|
(backward-up-list)
|
|
(point)))
|
|
|
|
(defun paredit-enclosing-list-end ()
|
|
(save-excursion
|
|
(up-list)
|
|
(point)))
|
|
|
|
(defun paredit-in-comment-p (&optional state)
|
|
"True if parse state STATE is within a comment.
|
|
If no parse state is supplied, compute one from the beginning of the
|
|
defun to the point."
|
|
;; 4. nil if outside a comment, t if inside a non-nestable comment,
|
|
;; else an integer (the current comment nesting)
|
|
(and (nth 4 (or state (paredit-current-parse-state)))
|
|
t))
|
|
|
|
(defun paredit-prefix-numeric-value (argument)
|
|
;++ Kludgerific.
|
|
(cond ((integerp argument) argument)
|
|
((eq argument '-) -1)
|
|
((consp argument)
|
|
(cond ((equal argument '(4)) (paredit-count-sexps-forward)) ;C-u
|
|
((equal argument '(16)) (paredit-count-sexps-backward)) ;C-u C-u
|
|
(t (error "Invalid prefix argument: %S" argument))))
|
|
((paredit-region-active-p)
|
|
(save-excursion
|
|
(save-restriction
|
|
(narrow-to-region (region-beginning) (region-end))
|
|
(cond ((= (point) (point-min)) (paredit-count-sexps-forward))
|
|
((= (point) (point-max)) (paredit-count-sexps-backward))
|
|
(t
|
|
(error "Point %S is not start or end of region: %S..%S"
|
|
(point) (region-beginning) (region-end)))))))
|
|
(t 1)))
|
|
|
|
(defun paredit-count-sexps-forward ()
|
|
(save-excursion
|
|
(let ((n 0) (p nil)) ;hurk
|
|
(paredit-ignore-sexp-errors
|
|
(while (setq p (scan-sexps (point) +1))
|
|
(goto-char p)
|
|
(setq n (+ n 1))))
|
|
n)))
|
|
|
|
(defun paredit-count-sexps-backward ()
|
|
(save-excursion
|
|
(let ((n 0) (p nil)) ;hurk
|
|
(paredit-ignore-sexp-errors
|
|
(while (setq p (scan-sexps (point) -1))
|
|
(goto-char p)
|
|
(setq n (+ n 1))))
|
|
n)))
|
|
|
|
(defun paredit-point-at-sexp-boundary (n)
|
|
(cond ((< n 0) (paredit-point-at-sexp-start))
|
|
((= n 0) (point))
|
|
((> n 0) (paredit-point-at-sexp-end))))
|
|
|
|
(defun paredit-point-at-sexp-start ()
|
|
(save-excursion
|
|
(forward-sexp)
|
|
(backward-sexp)
|
|
(point)))
|
|
|
|
(defun paredit-point-at-sexp-end ()
|
|
(save-excursion
|
|
(backward-sexp)
|
|
(forward-sexp)
|
|
(point)))
|
|
|
|
(defun paredit-lose-if-not-in-sexp (command)
|
|
(if (or (paredit-in-string-p)
|
|
(paredit-in-comment-p)
|
|
(paredit-in-char-p))
|
|
(error "Invalid context for command `%s'." command)))
|
|
|
|
(defun paredit-check-region (start end)
|
|
"Signal an error if text between `start' and `end' is unbalanced."
|
|
;; `narrow-to-region' will move the point, so avoid calling it if we
|
|
;; don't need to. We don't want to use `save-excursion' because we
|
|
;; want the point to move if `check-parens' reports an error.
|
|
(if (not (paredit-region-ok-p start end))
|
|
(save-restriction
|
|
(narrow-to-region start end)
|
|
(check-parens))))
|
|
|
|
(defun paredit-region-ok-p (start end)
|
|
"Return true iff the region between `start' and `end' is balanced.
|
|
This is independent of context -- it doesn't check what state the
|
|
text at `start' is in."
|
|
(save-excursion
|
|
(paredit-handle-sexp-errors
|
|
(progn
|
|
(save-restriction
|
|
(narrow-to-region start end)
|
|
(scan-sexps (point-min) (point-max)))
|
|
t)
|
|
nil)))
|
|
|
|
(defun paredit-current-indentation ()
|
|
(save-excursion
|
|
(back-to-indentation)
|
|
(current-column)))
|
|
|
|
(defun paredit-restore-column (column indentation)
|
|
;; Preserve the point's position either in the indentation or in the
|
|
;; code: if on code, move with the code; if in indentation, leave it
|
|
;; in the indentation, either where it was (if still on indentation)
|
|
;; or at the end of the indentation (if the code moved far enough
|
|
;; left).
|
|
(let ((indentation* (paredit-current-indentation)))
|
|
(goto-char
|
|
(+ (point-at-bol)
|
|
(cond ((not (< column indentation))
|
|
(+ column (- indentation* indentation)))
|
|
((<= indentation* column) indentation*)
|
|
(t column))))))
|
|
|
|
;;;; Initialization
|
|
|
|
(paredit-define-keys)
|
|
(paredit-annotate-mode-with-examples)
|
|
(paredit-annotate-functions-with-examples)
|
|
|
|
(provide 'paredit)
|
|
|
|
;;; Local Variables:
|
|
;;; outline-regexp: " \n;;;;+"
|
|
;;; End:
|
|
|
|
;;; paredit.el ends here
|