[DRE-commits] [SCM] haml-elisp.git branch, master, updated. 1970867e7895b8a60e853924ecc8a062bd3e773b
Gaston Ramos
ramos.gaston at gmail.com
Mon Jan 2 18:07:11 UTC 2012
The following commit has been merged in the master branch:
commit 1970867e7895b8a60e853924ecc8a062bd3e773b
Author: Gaston Ramos <ramos.gaston at gmail.com>
Date: Mon Jan 2 15:06:07 2012 -0300
- added haml-mode and license files from teh upstream repo.
diff --git a/MIT-LICENSE b/MIT-LICENSE
new file mode 100644
index 0000000..68b7aef
--- /dev/null
+++ b/MIT-LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/haml-mode.el b/haml-mode.el
new file mode 100644
index 0000000..c3fc1ee
--- /dev/null
+++ b/haml-mode.el
@@ -0,0 +1,753 @@
+;;; haml-mode.el --- Major mode for editing Haml files
+
+;; Copyright (c) 2007, 2008 Nathan Weizenbaum
+
+;; Author: Nathan Weizenbaum
+;; URL: http://github.com/nex3/haml/tree/master
+;; Version: 3.0.15
+;; Created: 2007-03-08
+;; By: Nathan Weizenbaum
+;; Keywords: markup, language, html
+
+;;; Commentary:
+
+;; Because Haml's indentation schema is similar
+;; to that of YAML and Python, many indentation-related
+;; functions are similar to those in yaml-mode and python-mode.
+
+;; To install, save this on your load path and add the following to
+;; your .emacs file:
+;;
+;; (require 'haml-mode)
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+(require 'ruby-mode)
+
+;; Additional (optional) libraries for fontification
+(require 'css-mode nil t)
+(require 'textile-mode nil t)
+(require 'markdown-mode nil t)
+(require 'javascript-mode "javascript" t)
+(require 'js nil t)
+
+
+;; User definable variables
+
+(defgroup haml nil
+ "Support for the Haml template language."
+ :group 'languages
+ :prefix "haml-")
+
+(defcustom haml-mode-hook nil
+ "Hook run when entering Haml mode."
+ :type 'hook
+ :group 'haml)
+
+(defcustom haml-indent-offset 2
+ "Amount of offset per level of indentation."
+ :type 'integer
+ :group 'haml)
+
+(defcustom haml-backspace-backdents-nesting t
+ "Non-nil to have `haml-electric-backspace' re-indent blocks of code.
+This means that all code nested beneath the backspaced line is
+re-indented along with the line itself."
+ :type 'boolean
+ :group 'haml)
+
+(defvar haml-indent-function 'haml-indent-p
+ "A function for checking if nesting is allowed.
+This function should look at the current line and return t
+if the next line could be nested within this line.
+
+The function can also return a positive integer to indicate
+a specific level to which the current line could be indented.")
+
+(defconst haml-tag-beg-re
+ "^[ \t]*\\(?:[%\\.#][a-z0-9_:\\-]*\\)+\\(?:(.*)\\|{.*}\\|\\[.*\\]\\)*"
+ "A regexp matching the beginning of a Haml tag, through (), {}, and [].")
+
+(defvar haml-block-openers
+ `(,(concat haml-tag-beg-re "[><]*[ \t]*$")
+ "^[ \t]*[&!]?[-=~].*do[ \t]*\\(|.*|[ \t]*\\)?$"
+ ,(concat "^[ \t]*[&!]?[-=~][ \t]*\\("
+ (regexp-opt '("if" "unless" "while" "until" "else" "for"
+ "begin" "elsif" "rescue" "ensure" "when"))
+ "\\)")
+ "^[ \t]*/\\(\\[.*\\]\\)?[ \t]*$"
+ "^[ \t]*-#"
+ "^[ \t]*:")
+ "A list of regexps that match lines of Haml that open blocks.
+That is, a Haml line that can have text nested beneath it should
+be matched by a regexp in this list.")
+
+;; Font lock
+
+(defun haml-nested-regexp (re)
+ "Create a regexp to match a block starting with RE.
+The line containing RE is matched, as well as all lines indented beneath it."
+ (concat "^\\([ \t]*\\)" re "\\(\n\\(?:\\(?:\\1 .*\\| *\\)\n\\)*\\(?:\\1 .*\\| *\\)?\\)?"))
+
+(defconst haml-font-lock-keywords
+ `((,(haml-nested-regexp "\\(?:-#\\|/\\).*") 0 font-lock-comment-face)
+ (,(haml-nested-regexp ":\\w+") 0 font-lock-string-face)
+ (haml-highlight-ruby-filter-block 1 font-lock-preprocessor-face)
+ (haml-highlight-css-filter-block 1 font-lock-preprocessor-face)
+ (haml-highlight-textile-filter-block 1 font-lock-preprocessor-face)
+ (haml-highlight-markdown-filter-block 1 font-lock-preprocessor-face)
+ (haml-highlight-js-filter-block 1 font-lock-preprocessor-face)
+ (haml-highlight-interpolation 1 font-lock-variable-name-face prepend)
+ (haml-highlight-ruby-tag 1 font-lock-preprocessor-face)
+ (haml-highlight-ruby-script 1 font-lock-preprocessor-face)
+ ("^!!!.*" 0 font-lock-constant-face)
+ ("\\s| *$" 0 font-lock-string-face)))
+
+(defconst haml-filter-re "^[ \t]*:\\w+")
+(defconst haml-comment-re "^[ \t]*\\(?:-\\#\\|/\\)")
+
+(defun haml-fontify-region (beg end keywords syntax-table syntactic-keywords)
+ "Fontify a region between BEG and END using another mode's fontification.
+
+KEYWORDS, SYNTAX-TABLE, and SYNTACTIC-KEYWORDS are the values of that mode's
+`font-lock-keywords', `font-lock-syntax-table',
+and `font-lock-syntactic-keywords', respectively."
+ (save-excursion
+ (save-match-data
+ (let ((font-lock-keywords keywords)
+ (font-lock-syntax-table syntax-table)
+ (font-lock-syntactic-keywords syntactic-keywords)
+ (font-lock-multiline 'undecided)
+ font-lock-keywords-only
+ font-lock-extend-region-functions
+ font-lock-keywords-case-fold-search)
+ ;; font-lock-fontify-region apparently isn't inclusive,
+ ;; so we have to move the beginning back one char
+ (font-lock-fontify-region (- beg 1) end)))))
+
+(defun haml-fontify-region-as-ruby (beg end)
+ "Use Ruby's font-lock variables to fontify the region between BEG and END."
+ (haml-fontify-region beg end ruby-font-lock-keywords
+ ruby-font-lock-syntax-table
+ ruby-font-lock-syntactic-keywords))
+
+(defun haml-handle-filter (filter-name limit fn)
+ "If a FILTER-NAME filter is found within LIMIT, run FN on that filter.
+
+FN is passed a pair of points representing the beginning and end
+of the filtered text."
+ (when (re-search-forward (haml-nested-regexp (concat ":" filter-name)) limit t)
+ (funcall fn (+ 2 (match-beginning 2)) (match-end 2))))
+
+(defun haml-fontify-filter-region (filter-name limit &rest fontify-region-args)
+ "If a FILTER-NAME filter is found within LIMIT, fontify it.
+
+The fontification is done by passing FONTIFY-REGION-ARGS to
+`haml-fontify-region'."
+ (haml-handle-filter filter-name limit
+ (lambda (beg end)
+ (apply 'haml-fontify-region
+ (append (list beg end)
+ fontify-region-args)))))
+
+(defun haml-highlight-ruby-filter-block (limit)
+ "If a :ruby filter is found within LIMIT, highlight it."
+ (haml-handle-filter "ruby" limit 'haml-fontify-region-as-ruby))
+
+(defun haml-highlight-css-filter-block (limit)
+ "If a :css filter is found within LIMIT, highlight it.
+
+This requires that `css-mode' is available.
+`css-mode' is included with Emacs 23."
+ (if (boundp 'css-font-lock-keywords)
+ (haml-fontify-filter-region "css" limit css-font-lock-keywords nil nil)))
+
+(defun haml-highlight-js-filter-block (limit)
+ "If a :javascript filter is found within LIMIT, highlight it.
+
+This requires that Karl Landström's javascript mode be available, either as the
+\"js.el\" bundled with Emacs 23, or as \"javascript.el\" found in ELPA and
+elsewhere."
+ (let ((keywords (or (and (featurep 'js) js--font-lock-keywords-3)
+ (and (featurep 'javascript-mode) js-font-lock-keywords-3)))
+ (syntax-table (or (and (featurep 'js) js-mode-syntax-table)
+ (and (featurep 'javascript-mode) javascript-mode-syntax-table))))
+ (when keywords
+ (haml-fontify-filter-region "javascript" limit keywords syntax-table nil))))
+
+(defun haml-highlight-textile-filter-block (limit)
+ "If a :textile filter is found within LIMIT, highlight it.
+
+This requires that `textile-mode' be available.
+
+Note that the results are not perfect, since `textile-mode' expects
+certain constructs such as \"h1.\" to be at the beginning of a line,
+and indented Haml filters always have leading whitespace."
+ (if (boundp 'textile-font-lock-keywords)
+ (haml-fontify-filter-region "textile" limit textile-font-lock-keywords nil nil)))
+
+(defun haml-highlight-markdown-filter-block (limit)
+ "If a :markdown filter is found within LIMIT, highlight it.
+
+This requires that `markdown-mode' be available."
+ (if (boundp 'markdown-mode-font-lock-keywords)
+ (haml-fontify-filter-region "markdown" limit
+ markdown-mode-font-lock-keywords
+ markdown-mode-syntax-table
+ nil)))
+
+(defun haml-highlight-ruby-script (limit)
+ "Highlight a Ruby script expression (-, =, or ~).
+LIMIT works as it does in `re-search-forward'."
+ (when (re-search-forward "^[ \t]*\\(-\\|[&!]?[=~]\\) \\(.*\\)$" limit t)
+ (haml-fontify-region-as-ruby (match-beginning 2) (match-end 2))))
+
+(defun haml-highlight-ruby-tag (limit)
+ "Highlight Ruby code within a Haml tag.
+LIMIT works as it does in `re-search-forward'.
+
+This highlights the tag attributes and object refs of the tag,
+as well as the script expression (-, =, or ~) following the tag.
+
+For example, this will highlight all of the following:
+ %p{:foo => 'bar'}
+ %p[@bar]
+ %p= 'baz'
+ %p{:foo => 'bar'}[@bar]= 'baz'"
+ (when (re-search-forward "^[ \t]*[%.#]" limit t)
+ (forward-char -1)
+
+ ;; Highlight tag, classes, and ids
+ (while (haml-move "\\([.#%]\\)[a-z0-9_:\\-]*")
+ (put-text-property (match-beginning 0) (match-end 0) 'face
+ (case (char-after (match-beginning 1))
+ (?% font-lock-function-name-face)
+ (?# font-lock-keyword-face)
+ (?. font-lock-type-face))))
+
+ (block loop
+ (while t
+ (let ((eol (save-excursion (end-of-line) (point))))
+ (case (char-after)
+ ;; Highlight obj refs
+ (?\[
+ (let ((beg (point)))
+ (haml-limited-forward-sexp eol)
+ (haml-fontify-region-as-ruby beg (point))))
+ ;; Highlight new attr hashes
+ (?\(
+ (forward-char 1)
+ (while
+ (and (haml-parse-new-attr-hash
+ (lambda (type beg end)
+ (case type
+ (name (put-text-property beg end 'face font-lock-constant-face))
+ (value (haml-fontify-region-as-ruby beg end)))))
+ (not (eobp)))
+ (forward-line 1)
+ (beginning-of-line)))
+ ;; Highlight old attr hashes
+ (?\{
+ (let ((beg (point)))
+ (haml-limited-forward-sexp eol)
+
+ ;; Check for multiline
+ (while (and (eolp) (eq (char-before) ?,) (not (eobp)))
+ (forward-line)
+ (let ((eol (save-excursion (end-of-line) (point))))
+ ;; If no sexps are closed,
+ ;; we're still continuing a multiline hash
+ (if (>= (car (parse-partial-sexp (point) eol)) 0)
+ (end-of-line)
+ ;; If sexps have been closed,
+ ;; set the point at the end of the total sexp
+ (goto-char beg)
+ (haml-limited-forward-sexp eol))))
+
+ (haml-fontify-region-as-ruby (+ 1 beg) (point))))
+ (t (return-from loop))))))
+
+ ;; Move past end chars
+ (when (looking-at "[<>&!]+") (goto-char (match-end 0)))
+ ;; Highlight script
+ (if (looking-at "\\([=~]\\) \\(.*\\)$")
+ (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-move (re)
+ "Try matching and moving to the end of regular expression RE.
+Returns non-nil if the expression was sucessfully matched."
+ (when (looking-at re)
+ (goto-char (match-end 0))
+ 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 (- (point) 1) (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-extend-region-filters-comments ()
+ "Extend the font-lock region to encompass filters and comments."
+ (let ((old-beg font-lock-beg)
+ (old-end font-lock-end))
+ (save-excursion
+ (goto-char font-lock-beg)
+ (beginning-of-line)
+ (unless (or (looking-at haml-filter-re)
+ (looking-at haml-comment-re))
+ (return-from haml-extend-region-filters-comments))
+ (setq font-lock-beg (point))
+ (haml-forward-sexp)
+ (beginning-of-line)
+ (setq font-lock-end (max font-lock-end (point))))
+ (or (/= old-beg font-lock-beg)
+ (/= old-end font-lock-end))))
+
+(defun* haml-extend-region-multiline-hashes ()
+ "Extend the font-lock region to encompass multiline attribute hashes."
+ (let ((old-beg font-lock-beg)
+ (old-end font-lock-end))
+ (save-excursion
+ (goto-char font-lock-beg)
+ (let ((attr-props (haml-parse-multiline-attr-hash))
+ multiline-end)
+ (when attr-props
+ (setq font-lock-beg (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))))
+ (setq font-lock-end (max font-lock-end (point))))))
+ (or (/= old-beg font-lock-beg)
+ (/= old-end font-lock-end))))
+
+
+;; Mode setup
+
+(defvar haml-mode-syntax-table
+ (let ((table (make-syntax-table)))
+ (modify-syntax-entry ?: "." table)
+ (modify-syntax-entry ?_ "w" 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))
+
+;;;###autoload
+(define-derived-mode haml-mode fundamental-mode "Haml"
+ "Major mode for editing Haml files.
+
+\\{haml-mode-map}"
+ (set-syntax-table haml-mode-syntax-table)
+ (add-to-list 'font-lock-extend-region-functions 'haml-extend-region-filters-comments)
+ (add-to-list 'font-lock-extend-region-functions 'haml-extend-region-multiline-hashes)
+ (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)))
+
+;; 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)))
+ (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 (- arg 1))))
+ (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 (- arg 1))))
+ (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))
+ (forward-line -1)
+ (end-of-line)
+ (point))))
+
+;; Indentation and electric keys
+
+(defun* haml-indent-p ()
+ "Returns 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)))))
+ (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 (- (match-end 0) 1))
+ (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]*$")))
+ (funcall fn 'name (match-beginning 0) (match-end 0))
+ (haml-move "[ \t]*")
+ (when (haml-move "=")
+ (haml-move "[ \t]*")
+ (unless (looking-at "[\"'@a-z]") (return-from haml-parse-new-attr-hash))
+ (let ((beg (point)))
+ (haml-limited-forward-sexp eol)
+ (funcall fn 'value beg (point)))
+ (haml-move "[ \t]*")))
+ nil))
+
+(defun haml-compute-indentation ()
+ "Calculate the maximum sensible indentation for the current line."
+ (save-excursion
+ (beginning-of-line)
+ (if (bobp) (list 0 nil)
+ (haml-forward-through-whitespace t)
+ (let ((indent (funcall haml-indent-function)))
+ (cond
+ ((consp indent) indent)
+ ((integerp indent) (list indent t))
+ (indent (list (+ (current-indentation) haml-indent-offset) nil))
+ (t (list (current-indentation) nil)))))))
+
+(defun haml-indent-region (start end)
+ "Indent each nonblank line in the region.
+This is done by indenting the first line based on
+`haml-compute-indentation' and preserving the relative
+indentation of the rest of the region. START and END specify the
+region to indent.
+
+If this command is used multiple times in a row, it will cycle
+between possible indentations."
+ (save-excursion
+ (goto-char end)
+ (setq end (point-marker))
+ (goto-char start)
+ (let (this-line-column current-column
+ (next-line-column
+ (if (and (equal last-command this-command) (/= (current-indentation) 0))
+ (* (/ (- (current-indentation) 1) haml-indent-offset) haml-indent-offset)
+ (car (haml-compute-indentation)))))
+ (while (< (point) end)
+ (setq this-line-column next-line-column
+ current-column (current-indentation))
+ ;; Delete whitespace chars at beginning of line
+ (delete-horizontal-space)
+ (unless (eolp)
+ (setq next-line-column (save-excursion
+ (loop do (forward-line 1)
+ while (and (not (eobp)) (looking-at "^[ \t]*$")))
+ (+ 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 (* (/ (- ci 1) 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)
+ (looking-at "^[ \t]+$"))
+ (backward-delete-char arg)
+ (save-excursion
+ (let ((ci (current-column)))
+ (beginning-of-line)
+ (if haml-backspace-backdents-nesting
+ (haml-mark-sexp-but-not-next-line)
+ (set-mark (save-excursion (end-of-line) (point))))
+ (haml-reindent-region-by (* (- arg) haml-indent-offset))
+ (pop-mark)))
+ (back-to-indentation)))
+
+(defun haml-kill-line-and-indent ()
+ "Kill the current line, and re-indent all lines nested beneath it."
+ (interactive)
+ (beginning-of-line)
+ (haml-mark-sexp-but-not-next-line)
+ (kill-line 1)
+ (haml-reindent-region-by (* -1 haml-indent-offset)))
+
+(defun haml-indent-string ()
+ "Return the indentation string for `haml-indent-offset'."
+ (mapconcat 'identity (make-list haml-indent-offset " ") ""))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.haml$" . haml-mode))
+
+;; Setup/Activation
+(provide 'haml-mode)
+;;; haml-mode.el ends here
--
haml-elisp.git
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