зеркало из https://github.com/github/ruby.git
570 строки
21 KiB
EmacsLisp
570 строки
21 KiB
EmacsLisp
;;; ruby-electric.el --- Minor mode for electrically editing ruby code
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;;
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;; Authors: Dee Zsombor <dee dot zsombor at gmail dot com>
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;; Yukihiro Matsumoto
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;; Nobuyoshi Nakada
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;; Akinori MUSHA <knu@iDaemons.org>
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;; Jakub Kuźma <qoobaa@gmail.com>
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;; Maintainer: Akinori MUSHA <knu@iDaemons.org>
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;; Created: 6 Mar 2005
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;; URL: https://github.com/knu/ruby-electric.el
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;; Keywords: languages ruby
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;; License: The same license terms as Ruby
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;; Version: 2.2.3
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;;; Commentary:
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;;
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;; `ruby-electric-mode' accelerates code writing in ruby by making
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;; some keys "electric" and automatically supplying with closing
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;; parentheses and "end" as appropriate.
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;;
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;; This work was originally inspired by a code snippet posted by
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;; [Frederick Ros](https://github.com/sleeper).
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;;
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;; Add the following line to enable ruby-electric-mode under
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;; ruby-mode.
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;;
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;; (eval-after-load "ruby-mode"
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;; '(add-hook 'ruby-mode-hook 'ruby-electric-mode))
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;;
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;; Type M-x customize-group ruby-electric for configuration.
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;;; Code:
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(require 'ruby-mode)
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(eval-when-compile
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(require 'cl))
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(defgroup ruby-electric nil
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"Minor mode providing electric editing commands for ruby files"
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:group 'ruby)
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(defconst ruby-electric-expandable-bar-re
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"\\s-\\(do\\|{\\)\\s-*|")
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(defconst ruby-electric-delimiters-alist
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'((?\{ :name "Curly brace" :handler ruby-electric-curlies :closing ?\})
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(?\[ :name "Square brace" :handler ruby-electric-matching-char :closing ?\])
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(?\( :name "Round brace" :handler ruby-electric-matching-char :closing ?\))
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(?\' :name "Quote" :handler ruby-electric-matching-char)
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(?\" :name "Double quote" :handler ruby-electric-matching-char)
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(?\` :name "Back quote" :handler ruby-electric-matching-char)
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(?\| :name "Vertical bar" :handler ruby-electric-bar)
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(?\# :name "Hash" :handler ruby-electric-hash)))
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(defvar ruby-electric-matching-delimeter-alist
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(apply 'nconc
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(mapcar #'(lambda (x)
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(let ((delim (car x))
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(plist (cdr x)))
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(if (eq (plist-get plist :handler) 'ruby-electric-matching-char)
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(list (cons delim (or (plist-get plist :closing)
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delim))))))
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ruby-electric-delimiters-alist)))
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(defvar ruby-electric-expandable-keyword-re)
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(defmacro ruby-electric--try-insert-and-do (string &rest body)
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(declare (indent 1))
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`(let ((before (point))
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(after (progn
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(insert ,string)
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(point))))
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(unwind-protect
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(progn ,@body)
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(delete-region before after)
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(goto-char before))))
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(defconst ruby-modifier-beg-symbol-re
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(regexp-opt ruby-modifier-beg-keywords 'symbols))
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(defun ruby-electric--modifier-keyword-at-point-p ()
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"Test if there is a modifier keyword at point."
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(and (looking-at ruby-modifier-beg-symbol-re)
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(let ((end (match-end 1)))
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(not (looking-back "\\."))
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(save-excursion
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(let ((indent1 (ruby-electric--try-insert-and-do "\n"
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(ruby-calculate-indent)))
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(indent2 (save-excursion
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(goto-char end)
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(ruby-electric--try-insert-and-do " x\n"
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(ruby-calculate-indent)))))
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(= indent1 indent2))))))
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(defconst ruby-block-mid-symbol-re
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(regexp-opt ruby-block-mid-keywords 'symbols))
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(defun ruby-electric--block-mid-keyword-at-point-p ()
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"Test if there is a block mid keyword at point."
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(and (looking-at ruby-block-mid-symbol-re)
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(looking-back "^\\s-*")))
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(defconst ruby-block-beg-symbol-re
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(regexp-opt ruby-block-beg-keywords 'symbols))
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(defun ruby-electric--block-beg-keyword-at-point-p ()
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"Test if there is a block beginning keyword at point."
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(and (looking-at ruby-block-beg-symbol-re)
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(if (string= (match-string 1) "do")
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(looking-back "\\s-")
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(not (looking-back "\\.")))
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;; (not (ruby-electric--modifier-keyword-at-point-p)) ;; implicit assumption
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))
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(defcustom ruby-electric-keywords-alist
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'(("begin" . end)
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("case" . end)
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("class" . end)
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("def" . end)
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("do" . end)
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("else" . reindent)
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("elsif" . reindent)
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("end" . reindent)
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("ensure" . reindent)
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("for" . end)
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("if" . end)
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("module" . end)
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("rescue" . reindent)
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("unless" . end)
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("until" . end)
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("when" . reindent)
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("while" . end))
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"Alist of keywords and actions to define how to react to space
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or return right after each keyword. In each (KEYWORD . ACTION)
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cons, ACTION can be set to one of the following values:
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`reindent' Reindent the line.
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`end' Reindent the line and auto-close the keyword with
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end if applicable.
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`nil' Do nothing.
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"
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:type '(repeat (cons (string :tag "Keyword")
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(choice :tag "Action"
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:menu-tag "Action"
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(const :tag "Auto-close with end"
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:value end)
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(const :tag "Auto-reindent"
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:value reindent)
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(const :tag "None"
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:value nil))))
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:set (lambda (sym val)
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(set sym val)
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(let (keywords)
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(dolist (x val)
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(let ((keyword (car x))
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(action (cdr x)))
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(if action
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(setq keywords (cons keyword keywords)))))
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(setq ruby-electric-expandable-keyword-re
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(concat (regexp-opt keywords 'symbols)
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"$"))))
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:group 'ruby-electric)
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(defvar ruby-electric-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map " " 'ruby-electric-space/return)
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(define-key map [remap delete-backward-char] 'ruby-electric-delete-backward-char)
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(define-key map [remap newline] 'ruby-electric-space/return)
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(define-key map [remap newline-and-indent] 'ruby-electric-space/return)
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(define-key map [remap electric-newline-and-maybe-indent] 'ruby-electric-space/return)
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(dolist (x ruby-electric-delimiters-alist)
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(let* ((delim (car x))
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(plist (cdr x))
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(name (plist-get plist :name))
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(func (plist-get plist :handler))
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(closing (plist-get plist :closing)))
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(define-key map (char-to-string delim) func)
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(if closing
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(define-key map (char-to-string closing) 'ruby-electric-closing-char))))
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map)
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"Keymap used in ruby-electric-mode")
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(defcustom ruby-electric-expand-delimiters-list '(all)
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"*List of contexts where matching delimiter should be inserted.
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The word 'all' will do all insertions."
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:type `(set :extra-offset 8
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(const :tag "Everything" all)
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,@(apply 'list
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(mapcar #'(lambda (x)
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`(const :tag ,(plist-get (cdr x) :name)
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,(car x)))
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ruby-electric-delimiters-alist)))
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:group 'ruby-electric)
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(defcustom ruby-electric-newline-before-closing-bracket nil
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"*Non-nil means a newline should be inserted before an
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automatically inserted closing bracket."
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:type 'boolean :group 'ruby-electric)
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(defcustom ruby-electric-autoindent-on-closing-char nil
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"*Non-nil means the current line should be automatically
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indented when a closing character is manually typed in."
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:type 'boolean :group 'ruby-electric)
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(defvar ruby-electric-mode-hook nil
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"Called after `ruby-electric-mode' is turned on.")
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;;;###autoload
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(define-minor-mode ruby-electric-mode
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"Toggle Ruby Electric minor mode.
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With no argument, this command toggles the mode. Non-null prefix
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argument turns on the mode. Null prefix argument turns off the
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mode.
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When Ruby Electric mode is enabled, an indented 'end' is
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heuristicaly inserted whenever typing a word like 'module',
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'class', 'def', 'if', 'unless', 'case', 'until', 'for', 'begin',
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'do' followed by a space. Single, double and back quotes as well
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as braces are paired auto-magically. Expansion does not occur
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inside comments and strings. Note that you must have Font Lock
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enabled."
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;; initial value.
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nil
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;;indicator for the mode line.
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" REl"
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;;keymap
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ruby-electric-mode-map
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(if ruby-electric-mode
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(run-hooks 'ruby-electric-mode-hook)))
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(defun ruby-electric-space/return-fallback ()
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(if (or (eq this-original-command 'ruby-electric-space/return)
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(null (ignore-errors
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;; ac-complete may fail if there is nothing left to complete
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(call-interactively this-original-command)
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(setq this-command this-original-command))))
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;; fall back to a globally bound command
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(let ((command (global-key-binding (char-to-string last-command-event) t)))
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(and command
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(call-interactively (setq this-command command))))))
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(defun ruby-electric-space/return (arg)
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(interactive "*P")
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(and (boundp 'sp-last-operation)
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(setq sp-delayed-pair nil))
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(cond ((or arg
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(region-active-p))
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(or (= last-command-event ?\s)
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(setq last-command-event ?\n))
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(ruby-electric-replace-region-or-insert))
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((ruby-electric-space/return-can-be-expanded-p)
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(let (action)
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(save-excursion
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(goto-char (match-beginning 0))
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(let* ((keyword (match-string 1))
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(allowed-actions
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(cond ((ruby-electric--modifier-keyword-at-point-p)
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'(reindent)) ;; no end necessary
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((ruby-electric--block-mid-keyword-at-point-p)
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'(reindent)) ;; ditto
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((ruby-electric--block-beg-keyword-at-point-p)
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'(end reindent)))))
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(if allowed-actions
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(setq action
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(let ((action (cdr (assoc keyword ruby-electric-keywords-alist))))
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(and (memq action allowed-actions)
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action))))))
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(cond ((eq action 'end)
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(ruby-indent-line)
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(save-excursion
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(newline)
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(ruby-electric-end)))
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((eq action 'reindent)
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(ruby-indent-line)))
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(ruby-electric-space/return-fallback)))
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((and (eq this-original-command 'newline-and-indent)
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(ruby-electric-comment-at-point-p))
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(call-interactively (setq this-command 'comment-indent-new-line)))
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(t
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(ruby-electric-space/return-fallback))))
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(defun ruby-electric--get-faces-at-point ()
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(let* ((point (point))
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(value (or
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(get-text-property point 'read-face-name)
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(get-text-property point 'face))))
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(if (listp value) value (list value))))
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(defun ruby-electric--faces-at-point-include-p (&rest faces)
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(and ruby-electric-mode
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(loop for face in faces
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with pfaces = (ruby-electric--get-faces-at-point)
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thereis (memq face pfaces))))
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(defun ruby-electric-code-at-point-p()
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(not (ruby-electric--faces-at-point-include-p
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'font-lock-string-face
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'font-lock-comment-face)))
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(defun ruby-electric-string-at-point-p()
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(ruby-electric--faces-at-point-include-p
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'font-lock-string-face))
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(defun ruby-electric-comment-at-point-p()
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(ruby-electric--faces-at-point-include-p
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'font-lock-comment-face))
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(defun ruby-electric-escaped-p()
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(let ((f nil))
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(save-excursion
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(while (char-equal ?\\ (preceding-char))
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(backward-char 1)
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(setq f (not f))))
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f))
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(defun ruby-electric-command-char-expandable-punct-p(char)
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(or (memq 'all ruby-electric-expand-delimiters-list)
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(memq char ruby-electric-expand-delimiters-list)))
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(defun ruby-electric-space/return-can-be-expanded-p()
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(and (ruby-electric-code-at-point-p)
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(looking-back ruby-electric-expandable-keyword-re)))
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(defun ruby-electric-replace-region-or-insert ()
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(and (region-active-p)
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(bound-and-true-p delete-selection-mode)
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(fboundp 'delete-selection-helper)
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(delete-selection-helper (get 'self-insert-command 'delete-selection)))
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(insert (make-string (prefix-numeric-value current-prefix-arg)
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last-command-event))
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(setq this-command 'self-insert-command))
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(defmacro ruby-electric-insert (arg &rest body)
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`(cond ((and
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(null ,arg)
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(ruby-electric-command-char-expandable-punct-p last-command-event))
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(let ((region-beginning
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(cond ((region-active-p)
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(prog1
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(save-excursion
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(goto-char (region-beginning))
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(insert last-command-event)
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(point))
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(goto-char (region-end))))
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(t
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(insert last-command-event)
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nil))))
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,@body
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(and region-beginning
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;; If no extra character is inserted, go back to the
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;; region beginning.
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(eq this-command 'self-insert-command)
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(goto-char region-beginning))))
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((ruby-electric-replace-region-or-insert))))
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(defun ruby-electric-curlies (arg)
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(interactive "*P")
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(ruby-electric-insert
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arg
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(cond
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((ruby-electric-code-at-point-p)
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(save-excursion
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(insert "}")
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(font-lock-fontify-region (line-beginning-position) (point)))
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(cond
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((ruby-electric-string-at-point-p) ;; %w{}, %r{}, etc.
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(if region-beginning
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(forward-char 1)))
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(ruby-electric-newline-before-closing-bracket
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(cond (region-beginning
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(save-excursion
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(goto-char region-beginning)
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(newline))
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(newline)
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(forward-char 1)
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(indent-region region-beginning (line-end-position)))
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(t
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(insert " ")
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(save-excursion
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(newline)
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(ruby-indent-line t)))))
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(t
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(if region-beginning
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(save-excursion
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(goto-char region-beginning)
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(insert " "))
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(insert " "))
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(insert " ")
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(and region-beginning
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(forward-char 1)))))
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((ruby-electric-string-at-point-p)
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(let ((start-position (1- (or region-beginning (point)))))
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(cond
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((char-equal ?\# (char-before start-position))
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(unless (save-excursion
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(goto-char (1- start-position))
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(ruby-electric-escaped-p))
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(insert "}")
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(or region-beginning
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(backward-char 1))))
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((or
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(ruby-electric-command-char-expandable-punct-p ?\#)
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(save-excursion
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(goto-char start-position)
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(ruby-electric-escaped-p)))
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(if region-beginning
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(goto-char region-beginning))
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(setq this-command 'self-insert-command))
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(t
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(save-excursion
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(goto-char start-position)
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(insert "#"))
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(insert "}")
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(or region-beginning
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(backward-char 1))))))
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(t
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(delete-char -1)
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(ruby-electric-replace-region-or-insert)))))
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(defun ruby-electric-hash (arg)
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(interactive "*P")
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(ruby-electric-insert
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arg
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(if (ruby-electric-string-at-point-p)
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(let ((start-position (1- (or region-beginning (point)))))
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(cond
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((char-equal (following-char) ?')) ;; likely to be in ''
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((save-excursion
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(goto-char start-position)
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(ruby-electric-escaped-p)))
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(region-beginning
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(save-excursion
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(goto-char (1+ start-position))
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(insert "{"))
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(insert "}"))
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(t
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(insert "{")
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(save-excursion
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(insert "}")))))
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(delete-char -1)
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(ruby-electric-replace-region-or-insert))))
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(defun ruby-electric-matching-char (arg)
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(interactive "*P")
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(ruby-electric-insert
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arg
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(let ((closing (cdr (assoc last-command-event
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ruby-electric-matching-delimeter-alist))))
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(cond
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;; quotes
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((char-equal closing last-command-event)
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(cond ((let ((start-position (or region-beginning (point))))
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;; check if this quote has just started a string
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(and
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(unwind-protect
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(save-excursion
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(subst-char-in-region (1- start-position) start-position
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last-command-event ?\s)
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(goto-char (1- start-position))
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(save-excursion
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(font-lock-fontify-region (line-beginning-position) (1+ (point))))
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(not (ruby-electric-string-at-point-p)))
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(subst-char-in-region (1- start-position) start-position
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?\s last-command-event))
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(save-excursion
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(goto-char (1- start-position))
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(save-excursion
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(font-lock-fontify-region (line-beginning-position) (1+ (point))))
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(ruby-electric-string-at-point-p))))
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(if region-beginning
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;; escape quotes of the same kind, backslash and hash
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(let ((re (format "[%c\\%s]"
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last-command-event
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(if (char-equal last-command-event ?\")
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"#" "")))
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(bound (point)))
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(save-excursion
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(goto-char region-beginning)
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(while (re-search-forward re bound t)
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(let ((end (point)))
|
|
(replace-match "\\\\\\&")
|
|
(setq bound (+ bound (- (point) end))))))))
|
|
(insert closing)
|
|
(or region-beginning
|
|
(backward-char 1)))
|
|
(t
|
|
(and (eq last-command 'ruby-electric-matching-char)
|
|
(char-equal (following-char) closing) ;; repeated quotes
|
|
(delete-char 1))
|
|
(setq this-command 'self-insert-command))))
|
|
((ruby-electric-code-at-point-p)
|
|
(insert closing)
|
|
(or region-beginning
|
|
(backward-char 1)))))))
|
|
|
|
(defun ruby-electric-closing-char(arg)
|
|
(interactive "*P")
|
|
(cond
|
|
(arg
|
|
(ruby-electric-replace-region-or-insert))
|
|
((and
|
|
(eq last-command 'ruby-electric-curlies)
|
|
(= last-command-event ?})
|
|
(not (char-equal (preceding-char) last-command-event))) ;; {}
|
|
(if (char-equal (following-char) ?\n) (delete-char 1))
|
|
(delete-horizontal-space)
|
|
(forward-char))
|
|
((and
|
|
(= last-command-event (following-char))
|
|
(not (char-equal (preceding-char) last-command-event))
|
|
(memq last-command '(ruby-electric-matching-char
|
|
ruby-electric-closing-char))) ;; ()/[] and (())/[[]]
|
|
(forward-char))
|
|
(t
|
|
(ruby-electric-replace-region-or-insert)
|
|
(if ruby-electric-autoindent-on-closing-char
|
|
(ruby-indent-line)))))
|
|
|
|
(defun ruby-electric-bar(arg)
|
|
(interactive "*P")
|
|
(ruby-electric-insert
|
|
arg
|
|
(cond ((and (ruby-electric-code-at-point-p)
|
|
(looking-back ruby-electric-expandable-bar-re))
|
|
(save-excursion (insert "|")))
|
|
(t
|
|
(delete-char -1)
|
|
(ruby-electric-replace-region-or-insert)))))
|
|
|
|
(defun ruby-electric-delete-backward-char(arg)
|
|
(interactive "*p")
|
|
(cond ((memq last-command '(ruby-electric-matching-char
|
|
ruby-electric-bar))
|
|
(delete-char 1))
|
|
((eq last-command 'ruby-electric-curlies)
|
|
(cond ((eolp)
|
|
(cond ((char-equal (preceding-char) ?\s)
|
|
(setq this-command last-command))
|
|
((char-equal (preceding-char) ?{)
|
|
(and (looking-at "[ \t\n]*}")
|
|
(delete-char (- (match-end 0) (match-beginning 0)))))))
|
|
((char-equal (following-char) ?\s)
|
|
(setq this-command last-command)
|
|
(delete-char 1))
|
|
((char-equal (following-char) ?})
|
|
(delete-char 1))))
|
|
((eq last-command 'ruby-electric-hash)
|
|
(and (char-equal (preceding-char) ?{)
|
|
(delete-char 1))))
|
|
(delete-char (- arg)))
|
|
|
|
(put 'ruby-electric-delete-backward-char 'delete-selection 'supersede)
|
|
|
|
(defun ruby-electric-end ()
|
|
(interactive)
|
|
(if (eq (char-syntax (preceding-char)) ?w)
|
|
(insert " "))
|
|
(insert "end")
|
|
(save-excursion
|
|
(if (eq (char-syntax (following-char)) ?w)
|
|
(insert " "))
|
|
(ruby-indent-line t)))
|
|
|
|
(provide 'ruby-electric)
|
|
|
|
;;; ruby-electric.el ends here
|