889 lines
32 KiB
EmacsLisp
889 lines
32 KiB
EmacsLisp
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;;; haml-mode.el --- Major mode for editing Haml files
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;; Copyright (c) 2007, 2008 Nathan Weizenbaum
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;; Author: Nathan Weizenbaum
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;; URL: http://github.com/nex3/haml/tree/master
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;; Package-Requires: ((ruby-mode "1.0"))
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;; Version: 3.1.5
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;; Created: 2007-03-08
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;; By: Nathan Weizenbaum
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;; Keywords: markup, language, html
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;;; Commentary:
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;; Because Haml's indentation schema is similar
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;; to that of YAML and Python, many indentation-related
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;; functions are similar to those in yaml-mode and python-mode.
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;; To install, save this on your load path and add the following to
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;; your .emacs file:
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;;
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;; (require 'haml-mode)
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'ruby-mode)
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;; Additional (optional) libraries for fontification
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(require 'css-mode nil t)
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(require 'textile-mode nil t)
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(require 'markdown-mode nil t)
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(or
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(require 'js nil t)
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(require 'javascript-mode "javascript" t))
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;; User definable variables
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(defgroup haml nil
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"Support for the Haml template language."
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:group 'languages
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:prefix "haml-")
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(defcustom haml-mode-hook nil
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"Hook run when entering Haml mode."
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:type 'hook
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:group 'haml)
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(defcustom haml-indent-offset 2
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"Amount of offset per level of indentation."
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:type 'integer
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:group 'haml)
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(defcustom haml-backspace-backdents-nesting t
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"Non-nil to have `haml-electric-backspace' re-indent blocks of code.
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This means that all code nested beneath the backspaced line is
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re-indented along with the line itself."
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:type 'boolean
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:group 'haml)
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(defvar haml-indent-function 'haml-indent-p
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"A function for checking if nesting is allowed.
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This function should look at the current line and return t
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if the next line could be nested within this line.
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The function can also return a positive integer to indicate
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a specific level to which the current line could be indented.")
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(defconst haml-tag-beg-re
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"^[ \t]*\\([%\\.#][a-z0-9_:\\-]+\\)+\\(?:(.*)\\|{.*}\\|\\[.*\\]\\)*"
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"A regexp matching the beginning of a Haml tag, through (), {}, and [].")
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(defvar haml-block-openers
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`(,(concat haml-tag-beg-re "[><]*[ \t]*$")
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"^[ \t]*[&!]?[-=~].*do[ \t]*\\(|.*|[ \t]*\\)?$"
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,(concat "^[ \t]*[&!]?[-=~][ \t]*\\("
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(regexp-opt '("if" "unless" "while" "until" "else" "for"
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"begin" "elsif" "rescue" "ensure" "when"))
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"\\)")
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"^[ \t]*/\\(\\[.*\\]\\)?[ \t]*$"
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"^[ \t]*-#"
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"^[ \t]*:")
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"A list of regexps that match lines of Haml that open blocks.
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That is, a Haml line that can have text nested beneath it should
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be matched by a regexp in this list.")
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;; Font lock
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(defun haml-nested-regexp (re)
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"Create a regexp to match a block starting with RE.
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The line containing RE is matched, as well as all lines indented beneath it."
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(concat "^\\([ \t]*\\)\\(" re "\\)\\([ \t]*\\(?:\n\\(?:\\1 +[^\n]*\\)?\\)*\n?\\)$"))
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(defconst haml-font-lock-keywords
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`((haml-highlight-interpolation 1 font-lock-variable-name-face prepend)
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(haml-highlight-ruby-tag 1 font-lock-preprocessor-face)
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(haml-highlight-ruby-script 1 font-lock-preprocessor-face)
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;; TODO: distinguish between "/" comments, which can contain HAML
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;; output directives, and "-#", which are completely ignored
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haml-highlight-comment
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haml-highlight-filter
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("^!!!.*" 0 font-lock-constant-face)
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("\\s| *$" 0 font-lock-string-face)))
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(defconst haml-filter-re (haml-nested-regexp ":\\w+"))
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(defconst haml-comment-re (haml-nested-regexp "\\(?:-\\#\\|/\\)[^\n]*"))
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(defun haml-highlight-comment (limit)
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"Highlight any -# or / comment found up to LIMIT."
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(when (re-search-forward haml-comment-re limit t)
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(let ((beg (match-beginning 0))
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(end (match-end 0)))
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(put-text-property beg end 'face 'font-lock-comment-face)
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(goto-char end))))
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;; Fontifying sub-regions for other languages
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(defun haml-fontify-region
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(beg end keywords syntax-table syntactic-keywords syntax-propertize-fn)
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"Fontify a region between BEG and END using another mode's fontification.
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KEYWORDS, SYNTAX-TABLE, SYNTACTIC-KEYWORDS and
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SYNTAX-PROPERTIZE-FN are the values of that mode's
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`font-lock-keywords', `font-lock-syntax-table',
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`font-lock-syntactic-keywords', and `syntax-propertize-function'
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respectively."
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(save-excursion
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(save-match-data
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(let ((font-lock-keywords keywords)
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(font-lock-syntax-table syntax-table)
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(font-lock-syntactic-keywords syntactic-keywords)
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(syntax-propertize-function syntax-propertize-fn)
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(font-lock-multiline 'undecided)
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(font-lock-dont-widen t)
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font-lock-keywords-only
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font-lock-extend-region-functions
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font-lock-keywords-case-fold-search)
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(save-restriction
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(narrow-to-region (1- beg) end)
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;; font-lock-fontify-region apparently isn't inclusive,
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;; so we have to move the beginning back one char
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(font-lock-fontify-region (1- beg) end))))))
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(defun haml-fontify-region-as-ruby (beg end)
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"Use Ruby's font-lock variables to fontify the region between BEG and END."
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(haml-fontify-region beg end ruby-font-lock-keywords
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ruby-font-lock-syntax-table
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(when (boundp 'ruby-font-lock-syntactic-keywords)
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ruby-font-lock-syntactic-keywords)
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(when (fboundp 'ruby-syntax-propertize-function)
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#'ruby-syntax-propertize-function)))
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(defun haml-fontify-region-as-css (beg end)
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"Fontify CSS code from BEG to END.
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This requires that `css-mode' is available.
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`css-mode' is included with Emacs 23."
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(when (boundp 'css-font-lock-keywords)
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(haml-fontify-region beg end
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css-font-lock-keywords
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css-mode-syntax-table
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nil
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nil)))
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(defun haml-fontify-region-as-javascript (beg end)
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"Fontify javascript code from BEG to END.
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This requires that Karl Landstr<EFBFBD>m's javascript mode be available, either as the
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\"js.el\" bundled with Emacs >= 23, or as \"javascript.el\" found in ELPA and
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elsewhere."
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(let ((keywords (or (and (featurep 'js) js--font-lock-keywords-3)
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(and (featurep 'javascript-mode) js-font-lock-keywords-3)))
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(syntax-table (or (and (featurep 'js) js-mode-syntax-table)
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(and (featurep 'javascript-mode) javascript-mode-syntax-table)))
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(syntax-propertize (and (featurep 'js) 'js-syntax-propertize)))
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(when keywords
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(when (and (fboundp 'js--update-quick-match-re) (null js--quick-match-re-func))
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(js--update-quick-match-re))
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(haml-fontify-region beg end keywords syntax-table nil syntax-propertize))))
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(defun haml-fontify-region-as-textile (beg end)
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"Highlight textile from BEG to END.
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This requires that `textile-mode' be available.
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Note that the results are not perfect, since `textile-mode' expects
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certain constructs such as \"h1.\" to be at the beginning of a line,
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and indented Haml filters always have leading whitespace."
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(if (boundp 'textile-font-lock-keywords)
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(haml-fontify-region beg end textile-font-lock-keywords nil nil nil)))
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(defun haml-fontify-region-as-markdown (beg end)
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"Highlight markdown from BEG to END.
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This requires that `markdown-mode' be available."
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(if (boundp 'markdown-mode-font-lock-keywords)
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(haml-fontify-region beg end
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markdown-mode-font-lock-keywords
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markdown-mode-syntax-table
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nil
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nil)))
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(defvar haml-fontify-filter-functions-alist
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'(("ruby" . haml-fontify-region-as-ruby)
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("css" . haml-fontify-region-as-css)
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("javascript" . haml-fontify-region-as-javascript)
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("textile" . haml-fontify-region-as-textile)
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("markdown" . haml-fontify-region-as-markdown))
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"An alist of (FILTER-NAME . FUNCTION) used to fontify code regions.
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FILTER-NAME is a string and FUNCTION is a function which will be
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used to fontify the filter's indented code region. FUNCTION will
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be passed the extents of that region in two arguments BEG and
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END.")
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(defun haml-highlight-filter (limit)
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"Highlight any :filter region found in the text up to LIMIT."
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(when (re-search-forward haml-filter-re limit t)
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;; fontify the filter name
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(put-text-property (match-beginning 2) (1+ (match-end 2))
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'face font-lock-preprocessor-face)
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(let ((filter-name (substring (match-string 2) 1))
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(code-start (1+ (match-beginning 3)))
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(code-end (match-end 3)))
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(save-match-data
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(funcall (or (cdr (assoc filter-name haml-fontify-filter-functions-alist))
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#'(lambda (beg end)
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(put-text-property beg end
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'face
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'font-lock-string-face)))
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code-start code-end))
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(goto-char (match-end 0)))))
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(defconst haml-possibly-multiline-code-re
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"\\(\\(?:.*?,[ \t]*\n\\)*.*\\)"
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"Regexp to match trailing ruby code which may continue onto subsequent lines.")
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(defconst haml-ruby-script-re
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(concat "^[ \t]*\\(-\\|[&!]?[=~]\\) " haml-possibly-multiline-code-re)
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"Regexp to match -, = or ~ blocks and any continued code lines.")
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(defun haml-highlight-ruby-script (limit)
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"Highlight a Ruby script expression (-, =, or ~).
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LIMIT works as it does in `re-search-forward'."
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(when (re-search-forward haml-ruby-script-re limit t)
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(haml-fontify-region-as-ruby (match-beginning 2) (match-end 2))))
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(defun haml-move (re)
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"Try matching and moving to the end of regular expression RE.
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Returns non-nil if the expression was sucessfully matched."
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(when (looking-at re)
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(goto-char (match-end 0))
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t))
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(defun haml-highlight-ruby-tag (limit)
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"Highlight Ruby code within a Haml tag.
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LIMIT works as it does in `re-search-forward'.
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This highlights the tag attributes and object refs of the tag,
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as well as the script expression (-, =, or ~) following the tag.
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For example, this will highlight all of the following:
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%p{:foo => 'bar'}
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%p[@bar]
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%p= 'baz'
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%p{:foo => 'bar'}[@bar]= 'baz'"
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(when (re-search-forward "^[ \t]*[%.#]" limit t)
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(forward-char -1)
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;; Highlight tag, classes, and ids
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(while (haml-move "\\([.#%]\\)[a-z0-9_:\\-]*")
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(put-text-property (match-beginning 0) (match-end 0) 'face
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(case (char-after (match-beginning 1))
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(?% font-lock-keyword-face)
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(?# font-lock-function-name-face)
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(?. font-lock-variable-name-face))))
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(block loop
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(while t
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(let ((eol (save-excursion (end-of-line) (point))))
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(case (char-after)
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;; Highlight obj refs
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(?\[
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(forward-char 1)
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(let ((beg (point)))
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(haml-limited-forward-sexp eol)
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(haml-fontify-region-as-ruby beg (point))))
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;; Highlight new attr hashes
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(?\(
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(forward-char 1)
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(while
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(and (haml-parse-new-attr-hash
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(lambda (type beg end)
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(case type
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(name (put-text-property beg end
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'face
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font-lock-constant-face))
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(value (haml-fontify-region-as-ruby beg end)))))
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(not (eobp)))
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(forward-line 1)
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(beginning-of-line)))
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;; Highlight old attr hashes
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(?\{
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(let ((beg (point)))
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(haml-limited-forward-sexp eol)
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;; Check for multiline
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(while (and (eolp) (eq (char-before) ?,) (not (eobp)))
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(forward-line)
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(let ((eol (save-excursion (end-of-line) (point))))
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;; If no sexps are closed,
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;; we're still continuing a multiline hash
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(if (>= (car (parse-partial-sexp (point) eol)) 0)
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(end-of-line)
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;; If sexps have been closed,
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;; set the point at the end of the total sexp
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(goto-char beg)
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(haml-limited-forward-sexp eol))))
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(haml-fontify-region-as-ruby (1+ beg) (point))))
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(t (return-from loop))))))
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;; Move past end chars
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(haml-move "[<>&!]+")
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;; Highlight script
|
|||
|
|
(if (looking-at (concat "\\([=~]\\) " haml-possibly-multiline-code-re))
|
|||
|
|
(haml-fontify-region-as-ruby (match-beginning 2) (match-end 2))
|
|||
|
|
;; Give font-lock something to highlight
|
|||
|
|
(forward-char -1)
|
|||
|
|
(looking-at "\\(\\)"))
|
|||
|
|
t))
|
|||
|
|
|
|||
|
|
(defun haml-highlight-interpolation (limit)
|
|||
|
|
"Highlight Ruby interpolation (#{foo}).
|
|||
|
|
LIMIT works as it does in `re-search-forward'."
|
|||
|
|
(when (re-search-forward "\\(#{\\)" limit t)
|
|||
|
|
(save-match-data
|
|||
|
|
(forward-char -1)
|
|||
|
|
(let ((beg (point)))
|
|||
|
|
(haml-limited-forward-sexp limit)
|
|||
|
|
(haml-fontify-region-as-ruby (1+ beg) (point)))
|
|||
|
|
(when (eq (char-before) ?\})
|
|||
|
|
(put-text-property (1- (point)) (point)
|
|||
|
|
'face font-lock-variable-name-face))
|
|||
|
|
t)))
|
|||
|
|
|
|||
|
|
(defun haml-limited-forward-sexp (limit &optional arg)
|
|||
|
|
"Move forward using `forward-sexp' or to LIMIT, whichever comes first.
|
|||
|
|
With ARG, do it that many times."
|
|||
|
|
(let (forward-sexp-function)
|
|||
|
|
(condition-case err
|
|||
|
|
(save-restriction
|
|||
|
|
(narrow-to-region (point) limit)
|
|||
|
|
(forward-sexp arg))
|
|||
|
|
(scan-error
|
|||
|
|
(unless (equal (nth 1 err) "Unbalanced parentheses")
|
|||
|
|
(signal 'scan-error (cdr err)))
|
|||
|
|
(goto-char limit)))))
|
|||
|
|
|
|||
|
|
(defun haml-find-containing-block (re)
|
|||
|
|
"If point is inside a block matching RE, return (start . end) for the block."
|
|||
|
|
(save-excursion
|
|||
|
|
(let ((pos (point))
|
|||
|
|
start end)
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(when (and
|
|||
|
|
(or (looking-at re)
|
|||
|
|
(when (re-search-backward re nil t)
|
|||
|
|
(looking-at re)))
|
|||
|
|
(< pos (match-end 0)))
|
|||
|
|
(setq start (match-beginning 0)
|
|||
|
|
end (match-end 0)))
|
|||
|
|
(when start
|
|||
|
|
(cons start end)))))
|
|||
|
|
|
|||
|
|
(defun haml-maybe-extend-region (extender)
|
|||
|
|
"Maybe extend the font lock region using EXTENDER.
|
|||
|
|
With point at the beginning of the font lock region, EXTENDER is called.
|
|||
|
|
If it returns a (START . END) pair, those positions are used to possibly
|
|||
|
|
extend the font lock region."
|
|||
|
|
(let ((old-beg font-lock-beg)
|
|||
|
|
(old-end font-lock-end))
|
|||
|
|
(save-excursion
|
|||
|
|
(goto-char font-lock-beg)
|
|||
|
|
(let ((new-bounds (funcall extender)))
|
|||
|
|
(when new-bounds
|
|||
|
|
(setq font-lock-beg (min font-lock-beg (car new-bounds))
|
|||
|
|
font-lock-end (max font-lock-end (cdr new-bounds))))))
|
|||
|
|
(or (/= old-beg font-lock-beg)
|
|||
|
|
(/= old-end font-lock-end))))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-nested-below ()
|
|||
|
|
"Extend the font-lock region to any subsequent indented lines."
|
|||
|
|
(haml-maybe-extend-region
|
|||
|
|
(lambda ()
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(when (looking-at (haml-nested-regexp "[^ \t].*"))
|
|||
|
|
(cons (match-beginning 0) (match-end 0))))))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-to-containing-block (re)
|
|||
|
|
"Extend the font-lock region to the smallest containing block matching RE."
|
|||
|
|
(haml-maybe-extend-region
|
|||
|
|
(lambda ()
|
|||
|
|
(haml-find-containing-block re))))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-filter ()
|
|||
|
|
"Extend the font-lock region to an enclosing filter."
|
|||
|
|
(haml-extend-region-to-containing-block haml-filter-re))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-comment ()
|
|||
|
|
"Extend the font-lock region to an enclosing comment."
|
|||
|
|
(haml-extend-region-to-containing-block haml-comment-re))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-ruby-script ()
|
|||
|
|
"Extend the font-lock region to encompass any current -/=/~ line."
|
|||
|
|
(haml-extend-region-to-containing-block haml-ruby-script-re))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-multiline-hashes ()
|
|||
|
|
"Extend the font-lock region to encompass multiline attribute hashes."
|
|||
|
|
(haml-maybe-extend-region
|
|||
|
|
(lambda ()
|
|||
|
|
(let ((attr-props (haml-parse-multiline-attr-hash))
|
|||
|
|
multiline-end
|
|||
|
|
start)
|
|||
|
|
(when attr-props
|
|||
|
|
(setq start (cdr (assq 'point attr-props)))
|
|||
|
|
|
|||
|
|
(end-of-line)
|
|||
|
|
;; Move through multiline attrs
|
|||
|
|
(when (eq (char-before) ?,)
|
|||
|
|
(save-excursion
|
|||
|
|
(while (progn (end-of-line)
|
|||
|
|
(and (eq (char-before) ?,) (not (eobp))))
|
|||
|
|
(forward-line))
|
|||
|
|
|
|||
|
|
(forward-line -1)
|
|||
|
|
(end-of-line)
|
|||
|
|
(setq multiline-end (point))))
|
|||
|
|
|
|||
|
|
(goto-char (+ (cdr (assq 'point attr-props))
|
|||
|
|
(cdr (assq 'hash-indent attr-props))
|
|||
|
|
-1))
|
|||
|
|
(haml-limited-forward-sexp
|
|||
|
|
(or multiline-end
|
|||
|
|
(save-excursion (end-of-line) (point))))
|
|||
|
|
(cons start (point)))))))
|
|||
|
|
|
|||
|
|
(defun haml-extend-region-contextual ()
|
|||
|
|
"Extend the font lock region piecemeal.
|
|||
|
|
|
|||
|
|
The result of calling this function repeatedly until it returns
|
|||
|
|
nil is that (FONT-LOCK-BEG . FONT-LOCK-END) will be the smallest
|
|||
|
|
possible region in which font-locking could be affected by
|
|||
|
|
changes in the initial region."
|
|||
|
|
(or
|
|||
|
|
(haml-extend-region-filter)
|
|||
|
|
(haml-extend-region-comment)
|
|||
|
|
(haml-extend-region-ruby-script)
|
|||
|
|
(haml-extend-region-multiline-hashes)
|
|||
|
|
(haml-extend-region-nested-below)
|
|||
|
|
(font-lock-extend-region-multiline)))
|
|||
|
|
|
|||
|
|
|
|||
|
|
;; Mode setup
|
|||
|
|
|
|||
|
|
(defvar haml-mode-syntax-table
|
|||
|
|
(let ((table (make-syntax-table)))
|
|||
|
|
(modify-syntax-entry ?: "." table)
|
|||
|
|
(modify-syntax-entry ?_ "w" table)
|
|||
|
|
(modify-syntax-entry ?' "\"" table)
|
|||
|
|
table)
|
|||
|
|
"Syntax table in use in `haml-mode' buffers.")
|
|||
|
|
|
|||
|
|
(defvar haml-mode-map
|
|||
|
|
(let ((map (make-sparse-keymap)))
|
|||
|
|
(define-key map [backspace] 'haml-electric-backspace)
|
|||
|
|
(define-key map "\C-?" 'haml-electric-backspace)
|
|||
|
|
(define-key map "\C-c\C-f" 'haml-forward-sexp)
|
|||
|
|
(define-key map "\C-c\C-b" 'haml-backward-sexp)
|
|||
|
|
(define-key map "\C-c\C-u" 'haml-up-list)
|
|||
|
|
(define-key map "\C-c\C-d" 'haml-down-list)
|
|||
|
|
(define-key map "\C-c\C-k" 'haml-kill-line-and-indent)
|
|||
|
|
(define-key map "\C-c\C-r" 'haml-output-region)
|
|||
|
|
(define-key map "\C-c\C-l" 'haml-output-buffer)
|
|||
|
|
map))
|
|||
|
|
|
|||
|
|
(defalias 'haml-parent-mode
|
|||
|
|
(if (fboundp 'prog-mode) 'prog-mode 'fundamental-mode))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(define-derived-mode haml-mode haml-parent-mode "Haml"
|
|||
|
|
"Major mode for editing Haml files.
|
|||
|
|
|
|||
|
|
\\{haml-mode-map}"
|
|||
|
|
(set-syntax-table haml-mode-syntax-table)
|
|||
|
|
(setq font-lock-extend-region-functions '(haml-extend-region-contextual))
|
|||
|
|
(set (make-local-variable 'jit-lock-contextually) t)
|
|||
|
|
(set (make-local-variable 'font-lock-multiline) t)
|
|||
|
|
(set (make-local-variable 'indent-line-function) 'haml-indent-line)
|
|||
|
|
(set (make-local-variable 'indent-region-function) 'haml-indent-region)
|
|||
|
|
(set (make-local-variable 'parse-sexp-lookup-properties) t)
|
|||
|
|
(set (make-local-variable 'comment-start) "-#")
|
|||
|
|
(setq font-lock-defaults '((haml-font-lock-keywords) t t))
|
|||
|
|
(setq indent-tabs-mode nil))
|
|||
|
|
|
|||
|
|
;; Useful functions
|
|||
|
|
|
|||
|
|
(defun haml-comment-block ()
|
|||
|
|
"Comment the current block of Haml code."
|
|||
|
|
(interactive)
|
|||
|
|
(save-excursion
|
|||
|
|
(let ((indent (current-indentation)))
|
|||
|
|
(back-to-indentation)
|
|||
|
|
(insert "-#")
|
|||
|
|
(newline)
|
|||
|
|
(indent-to indent)
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(haml-mark-sexp)
|
|||
|
|
(haml-reindent-region-by haml-indent-offset))))
|
|||
|
|
|
|||
|
|
(defun haml-uncomment-block ()
|
|||
|
|
"Uncomment the current block of Haml code."
|
|||
|
|
(interactive)
|
|||
|
|
(save-excursion
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(while (not (looking-at haml-comment-re))
|
|||
|
|
(haml-up-list)
|
|||
|
|
(beginning-of-line))
|
|||
|
|
(haml-mark-sexp)
|
|||
|
|
(kill-line 1)
|
|||
|
|
(haml-reindent-region-by (- haml-indent-offset))))
|
|||
|
|
|
|||
|
|
(defun haml-replace-region (start end)
|
|||
|
|
"Replace the current block of Haml code with the HTML equivalent.
|
|||
|
|
Called from a program, START and END specify the region to indent."
|
|||
|
|
(interactive "r")
|
|||
|
|
(save-excursion
|
|||
|
|
(goto-char end)
|
|||
|
|
(setq end (point-marker))
|
|||
|
|
(goto-char start)
|
|||
|
|
(let ((ci (current-indentation)))
|
|||
|
|
(while (re-search-forward "^ +" end t)
|
|||
|
|
(replace-match (make-string (- (current-indentation) ci) ? ))))
|
|||
|
|
(shell-command-on-region start end "haml" "haml-output" t)))
|
|||
|
|
|
|||
|
|
(defun haml-output-region (start end)
|
|||
|
|
"Displays the HTML output for the current block of Haml code.
|
|||
|
|
Called from a program, START and END specify the region to indent."
|
|||
|
|
(interactive "r")
|
|||
|
|
(kill-new (buffer-substring start end))
|
|||
|
|
(with-temp-buffer
|
|||
|
|
(yank)
|
|||
|
|
(haml-indent-region (point-min) (point-max))
|
|||
|
|
(shell-command-on-region (point-min) (point-max) "haml" "haml-output")))
|
|||
|
|
|
|||
|
|
(defun haml-output-buffer ()
|
|||
|
|
"Displays the HTML output for entire buffer."
|
|||
|
|
(interactive)
|
|||
|
|
(haml-output-region (point-min) (point-max)))
|
|||
|
|
|
|||
|
|
;; Navigation
|
|||
|
|
|
|||
|
|
(defun haml-forward-through-whitespace (&optional backward)
|
|||
|
|
"Move the point forward through any whitespace.
|
|||
|
|
The point will move forward at least one line, until it reaches
|
|||
|
|
either the end of the buffer or a line with no whitespace.
|
|||
|
|
|
|||
|
|
If BACKWARD is non-nil, move the point backward instead."
|
|||
|
|
(let ((arg (if backward -1 1))
|
|||
|
|
(endp (if backward 'bobp 'eobp)))
|
|||
|
|
(loop do (forward-line arg)
|
|||
|
|
while (and (not (funcall endp))
|
|||
|
|
(looking-at "^[ \t]*$")))))
|
|||
|
|
|
|||
|
|
(defun haml-at-indent-p ()
|
|||
|
|
"Return non-nil if the point is before any text on the line."
|
|||
|
|
(let ((opoint (point)))
|
|||
|
|
(save-excursion
|
|||
|
|
(back-to-indentation)
|
|||
|
|
(>= (point) opoint))))
|
|||
|
|
|
|||
|
|
(defun haml-forward-sexp (&optional arg)
|
|||
|
|
"Move forward across one nested expression.
|
|||
|
|
With ARG, do it that many times. Negative arg -N means move
|
|||
|
|
backward across N balanced expressions.
|
|||
|
|
|
|||
|
|
A sexp in Haml is defined as a line of Haml code as well as any
|
|||
|
|
lines nested beneath it."
|
|||
|
|
(interactive "p")
|
|||
|
|
(or arg (setq arg 1))
|
|||
|
|
(if (and (< arg 0) (not (haml-at-indent-p)))
|
|||
|
|
(back-to-indentation)
|
|||
|
|
(while (/= arg 0)
|
|||
|
|
(let ((indent (current-indentation)))
|
|||
|
|
(loop do (haml-forward-through-whitespace (< arg 0))
|
|||
|
|
while (and (not (eobp))
|
|||
|
|
(not (bobp))
|
|||
|
|
(> (current-indentation) indent)))
|
|||
|
|
(unless (eobp)
|
|||
|
|
(back-to-indentation))
|
|||
|
|
(setq arg (+ arg (if (> arg 0) -1 1)))))))
|
|||
|
|
|
|||
|
|
(defun haml-backward-sexp (&optional arg)
|
|||
|
|
"Move backward across one nested expression.
|
|||
|
|
With ARG, do it that many times. Negative arg -N means move
|
|||
|
|
forward across N balanced expressions.
|
|||
|
|
|
|||
|
|
A sexp in Haml is defined as a line of Haml code as well as any
|
|||
|
|
lines nested beneath it."
|
|||
|
|
(interactive "p")
|
|||
|
|
(haml-forward-sexp (if arg (- arg) -1)))
|
|||
|
|
|
|||
|
|
(defun haml-up-list (&optional arg)
|
|||
|
|
"Move out of one level of nesting.
|
|||
|
|
With ARG, do this that many times."
|
|||
|
|
(interactive "p")
|
|||
|
|
(or arg (setq arg 1))
|
|||
|
|
(while (> arg 0)
|
|||
|
|
(let ((indent (current-indentation)))
|
|||
|
|
(loop do (haml-forward-through-whitespace t)
|
|||
|
|
while (and (not (bobp))
|
|||
|
|
(>= (current-indentation) indent)))
|
|||
|
|
(setq arg (1- arg))))
|
|||
|
|
(back-to-indentation))
|
|||
|
|
|
|||
|
|
(defun haml-down-list (&optional arg)
|
|||
|
|
"Move down one level of nesting.
|
|||
|
|
With ARG, do this that many times."
|
|||
|
|
(interactive "p")
|
|||
|
|
(or arg (setq arg 1))
|
|||
|
|
(while (> arg 0)
|
|||
|
|
(let ((indent (current-indentation)))
|
|||
|
|
(haml-forward-through-whitespace)
|
|||
|
|
(when (<= (current-indentation) indent)
|
|||
|
|
(haml-forward-through-whitespace t)
|
|||
|
|
(back-to-indentation)
|
|||
|
|
(error "Nothing is nested beneath this line"))
|
|||
|
|
(setq arg (1- arg))))
|
|||
|
|
(back-to-indentation))
|
|||
|
|
|
|||
|
|
(defun haml-mark-sexp ()
|
|||
|
|
"Mark the next Haml block."
|
|||
|
|
(let ((forward-sexp-function 'haml-forward-sexp))
|
|||
|
|
(mark-sexp)))
|
|||
|
|
|
|||
|
|
(defun haml-mark-sexp-but-not-next-line ()
|
|||
|
|
"Mark the next Haml block, but not the next line.
|
|||
|
|
Put the mark at the end of the last line of the sexp rather than
|
|||
|
|
the first non-whitespace character of the next line."
|
|||
|
|
(haml-mark-sexp)
|
|||
|
|
(set-mark
|
|||
|
|
(save-excursion
|
|||
|
|
(goto-char (mark))
|
|||
|
|
(unless (eobp)
|
|||
|
|
(forward-line -1)
|
|||
|
|
(end-of-line))
|
|||
|
|
(point))))
|
|||
|
|
|
|||
|
|
;; Indentation and electric keys
|
|||
|
|
|
|||
|
|
(defvar haml-empty-elements
|
|||
|
|
'("area" "base" "br" "col" "command" "embed" "hr" "img" "input"
|
|||
|
|
"keygen" "link" "meta" "param" "source" "track" "wbr")
|
|||
|
|
"A list of html elements which may not contain content.
|
|||
|
|
|
|||
|
|
See http://www.w3.org/TR/html-markup/syntax.html.")
|
|||
|
|
|
|||
|
|
(defun haml-unnestable-tag-p ()
|
|||
|
|
"Return t if the current line is an empty element tag, or one with content."
|
|||
|
|
(when (looking-at haml-tag-beg-re)
|
|||
|
|
(save-excursion
|
|||
|
|
(goto-char (match-end 0))
|
|||
|
|
(or (string-match-p (concat "%" (regexp-opt haml-empty-elements) "\\b")
|
|||
|
|
(match-string 1))
|
|||
|
|
(progn
|
|||
|
|
(when (looking-at "[{(]")
|
|||
|
|
(ignore-errors (forward-sexp)))
|
|||
|
|
(looking-at "\\(?:=\\|==\\| \\)[[:blank:]]*[^[:blank:]\r\n]+"))))))
|
|||
|
|
|
|||
|
|
(defun haml-indent-p ()
|
|||
|
|
"Return t if the current line can have lines nested beneath it."
|
|||
|
|
(let ((attr-props (haml-parse-multiline-attr-hash)))
|
|||
|
|
(when attr-props
|
|||
|
|
(return-from haml-indent-p
|
|||
|
|
(if (haml-unclosed-attr-hash-p) (cdr (assq 'hash-indent attr-props))
|
|||
|
|
(list (+ (cdr (assq 'indent attr-props)) haml-indent-offset) nil)))))
|
|||
|
|
(unless (or (haml-unnestable-tag-p))
|
|||
|
|
(loop for opener in haml-block-openers
|
|||
|
|
if (looking-at opener) return t
|
|||
|
|
finally return nil)))
|
|||
|
|
|
|||
|
|
(defun* haml-parse-multiline-attr-hash ()
|
|||
|
|
"Parses a multiline attribute hash, and returns
|
|||
|
|
an alist with the following keys:
|
|||
|
|
|
|||
|
|
INDENT is the indentation of the line beginning the hash.
|
|||
|
|
|
|||
|
|
HASH-INDENT is the indentation of the first character
|
|||
|
|
within the attribute hash.
|
|||
|
|
|
|||
|
|
POINT is the character position at the beginning of the line
|
|||
|
|
beginning the hash."
|
|||
|
|
(save-excursion
|
|||
|
|
(while t
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(if (looking-at (concat haml-tag-beg-re "\\([{(]\\)"))
|
|||
|
|
(progn
|
|||
|
|
(goto-char (1- (match-end 0)))
|
|||
|
|
(haml-limited-forward-sexp (save-excursion (end-of-line) (point)))
|
|||
|
|
(return-from haml-parse-multiline-attr-hash
|
|||
|
|
(when (or (string-equal (match-string 1) "(") (eq (char-before) ?,))
|
|||
|
|
`((indent . ,(current-indentation))
|
|||
|
|
(hash-indent . ,(- (match-end 0) (match-beginning 0)))
|
|||
|
|
(point . ,(match-beginning 0))))))
|
|||
|
|
(when (bobp) (return-from haml-parse-multiline-attr-hash))
|
|||
|
|
(forward-line -1)
|
|||
|
|
(unless (haml-unclosed-attr-hash-p)
|
|||
|
|
(return-from haml-parse-multiline-attr-hash))))))
|
|||
|
|
|
|||
|
|
(defun* haml-unclosed-attr-hash-p ()
|
|||
|
|
"Return t if this line has an unclosed attribute hash, new or old."
|
|||
|
|
(save-excursion
|
|||
|
|
(end-of-line)
|
|||
|
|
(when (eq (char-before) ?,) (return-from haml-unclosed-attr-hash-p t))
|
|||
|
|
(re-search-backward "(\\|^")
|
|||
|
|
(haml-move "(")
|
|||
|
|
(haml-parse-new-attr-hash)))
|
|||
|
|
|
|||
|
|
(defun* haml-parse-new-attr-hash (&optional (fn (lambda (type beg end) ())))
|
|||
|
|
"Parse a new-style attribute hash on this line, and returns
|
|||
|
|
t if it's not finished on the current line.
|
|||
|
|
|
|||
|
|
FN should take three parameters: TYPE, BEG, and END.
|
|||
|
|
TYPE is the type of text parsed ('name or 'value)
|
|||
|
|
and BEG and END delimit that text in the buffer."
|
|||
|
|
(let ((eol (save-excursion (end-of-line) (point))))
|
|||
|
|
(while (not (haml-move ")"))
|
|||
|
|
(haml-move "[ \t]*")
|
|||
|
|
(unless (haml-move "[a-z0-9_:\\-]+")
|
|||
|
|
(return-from haml-parse-new-attr-hash (haml-move "[ \t]*$")))
|
|||
|
|
(funcall fn 'name (match-beginning 0) (match-end 0))
|
|||
|
|
(haml-move "[ \t]*")
|
|||
|
|
(when (haml-move "=")
|
|||
|
|
(haml-move "[ \t]*")
|
|||
|
|
(unless (looking-at "[\"'@a-z0-9]") (return-from haml-parse-new-attr-hash))
|
|||
|
|
(let ((beg (point)))
|
|||
|
|
(haml-limited-forward-sexp eol)
|
|||
|
|
(funcall fn 'value beg (point)))
|
|||
|
|
(haml-move "[ \t]*")))
|
|||
|
|
nil))
|
|||
|
|
|
|||
|
|
(defun haml-compute-indentation ()
|
|||
|
|
"Calculate the maximum sensible indentation for the current line."
|
|||
|
|
(save-excursion
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(if (bobp) (list 0 nil)
|
|||
|
|
(haml-forward-through-whitespace t)
|
|||
|
|
(let ((indent (funcall haml-indent-function)))
|
|||
|
|
(cond
|
|||
|
|
((consp indent) indent)
|
|||
|
|
((integerp indent) (list indent t))
|
|||
|
|
(indent (list (+ (current-indentation) haml-indent-offset) nil))
|
|||
|
|
(t (list (current-indentation) nil)))))))
|
|||
|
|
|
|||
|
|
(defun haml-indent-region (start end)
|
|||
|
|
"Indent each nonblank line in the region.
|
|||
|
|
This is done by indenting the first line based on
|
|||
|
|
`haml-compute-indentation' and preserving the relative
|
|||
|
|
indentation of the rest of the region. START and END specify the
|
|||
|
|
region to indent.
|
|||
|
|
|
|||
|
|
If this command is used multiple times in a row, it will cycle
|
|||
|
|
between possible indentations."
|
|||
|
|
(save-excursion
|
|||
|
|
(goto-char end)
|
|||
|
|
(setq end (point-marker))
|
|||
|
|
(goto-char start)
|
|||
|
|
(let (this-line-column current-column
|
|||
|
|
(next-line-column
|
|||
|
|
(if (and (equal last-command this-command) (/= (current-indentation) 0))
|
|||
|
|
(* (/ (1- (current-indentation)) haml-indent-offset) haml-indent-offset)
|
|||
|
|
(car (haml-compute-indentation)))))
|
|||
|
|
(while (< (point) end)
|
|||
|
|
(setq this-line-column next-line-column
|
|||
|
|
current-column (current-indentation))
|
|||
|
|
;; Delete whitespace chars at beginning of line
|
|||
|
|
(delete-horizontal-space)
|
|||
|
|
(unless (eolp)
|
|||
|
|
(setq next-line-column (save-excursion
|
|||
|
|
(loop do (forward-line 1)
|
|||
|
|
while (and (not (eobp)) (looking-at "^[ \t]*$")))
|
|||
|
|
(+ this-line-column
|
|||
|
|
(- (current-indentation) current-column))))
|
|||
|
|
;; Don't indent an empty line
|
|||
|
|
(unless (eolp) (indent-to this-line-column)))
|
|||
|
|
(forward-line 1)))
|
|||
|
|
(move-marker end nil)))
|
|||
|
|
|
|||
|
|
(defun haml-indent-line ()
|
|||
|
|
"Indent the current line.
|
|||
|
|
The first time this command is used, the line will be indented to the
|
|||
|
|
maximum sensible indentation. Each immediately subsequent usage will
|
|||
|
|
back-dent the line by `haml-indent-offset' spaces. On reaching column
|
|||
|
|
0, it will cycle back to the maximum sensible indentation."
|
|||
|
|
(interactive "*")
|
|||
|
|
(let ((ci (current-indentation))
|
|||
|
|
(cc (current-column)))
|
|||
|
|
(destructuring-bind (need strict) (haml-compute-indentation)
|
|||
|
|
(save-excursion
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(delete-horizontal-space)
|
|||
|
|
(if (and (not strict) (equal last-command this-command) (/= ci 0))
|
|||
|
|
(indent-to (* (/ (1- ci) haml-indent-offset) haml-indent-offset))
|
|||
|
|
(indent-to need))))
|
|||
|
|
(when (< (current-column) (current-indentation))
|
|||
|
|
(forward-to-indentation 0))))
|
|||
|
|
|
|||
|
|
(defun haml-reindent-region-by (n)
|
|||
|
|
"Add N spaces to the beginning of each line in the region.
|
|||
|
|
If N is negative, will remove the spaces instead. Assumes all
|
|||
|
|
lines in the region have indentation >= that of the first line."
|
|||
|
|
(let* ((ci (current-indentation))
|
|||
|
|
(indent-rx
|
|||
|
|
(concat "^"
|
|||
|
|
(if indent-tabs-mode
|
|||
|
|
(concat (make-string (/ ci tab-width) ?\t)
|
|||
|
|
(make-string (mod ci tab-width) ?\t))
|
|||
|
|
(make-string ci ?\s)))))
|
|||
|
|
(save-excursion
|
|||
|
|
(while (re-search-forward indent-rx (mark) t)
|
|||
|
|
(let ((ci (current-indentation)))
|
|||
|
|
(delete-horizontal-space)
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(indent-to (max 0 (+ ci n))))))))
|
|||
|
|
|
|||
|
|
(defun haml-electric-backspace (arg)
|
|||
|
|
"Delete characters or back-dent the current line.
|
|||
|
|
If invoked following only whitespace on a line, will back-dent
|
|||
|
|
the line and all nested lines to the immediately previous
|
|||
|
|
multiple of `haml-indent-offset' spaces. With ARG, do it that
|
|||
|
|
many times.
|
|||
|
|
|
|||
|
|
Set `haml-backspace-backdents-nesting' to nil to just back-dent
|
|||
|
|
the current line."
|
|||
|
|
(interactive "*p")
|
|||
|
|
(if (or (/= (current-indentation) (current-column))
|
|||
|
|
(bolp)
|
|||
|
|
(save-excursion
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(looking-at "^[ \t]+$")))
|
|||
|
|
(backward-delete-char arg)
|
|||
|
|
(save-excursion
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(unwind-protect
|
|||
|
|
(progn
|
|||
|
|
(if haml-backspace-backdents-nesting
|
|||
|
|
(haml-mark-sexp-but-not-next-line)
|
|||
|
|
(set-mark (save-excursion (end-of-line) (point))))
|
|||
|
|
(haml-reindent-region-by (* (- arg) haml-indent-offset)))
|
|||
|
|
(pop-mark)))
|
|||
|
|
(back-to-indentation)))
|
|||
|
|
|
|||
|
|
(defun haml-kill-line-and-indent ()
|
|||
|
|
"Kill the current line, and re-indent all lines nested beneath it."
|
|||
|
|
(interactive)
|
|||
|
|
(beginning-of-line)
|
|||
|
|
(haml-mark-sexp-but-not-next-line)
|
|||
|
|
(kill-line 1)
|
|||
|
|
(haml-reindent-region-by (* -1 haml-indent-offset)))
|
|||
|
|
|
|||
|
|
(defun haml-indent-string ()
|
|||
|
|
"Return the indentation string for `haml-indent-offset'."
|
|||
|
|
(mapconcat 'identity (make-list haml-indent-offset " ") ""))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(add-to-list 'auto-mode-alist '("\\.haml\\'" . haml-mode))
|
|||
|
|
|
|||
|
|
|
|||
|
|
;; Local Variables:
|
|||
|
|
;; coding: utf-8
|
|||
|
|
;; byte-compile-warnings: (not cl-functions)
|
|||
|
|
;; eval: (checkdoc-minor-mode 1)
|
|||
|
|
;; End:
|
|||
|
|
|
|||
|
|
(provide 'haml-mode)
|
|||
|
|
;;; haml-mode.el ends here
|