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;;; opa-js-mode.el --- Major mode for editing Opa-Js source text
;; Copyright (C) 2008 Free Software Foundation, Inc.
;; Author: Karl Landstrom <>
;; Maintainer: Karl Landstrom <>
;; Version: 2.2.1
;; Date: 2008-12-27
;; Keywords: languages, oop
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; The main features of this Opa-Js mode are syntactic
;; highlighting (enabled with `font-lock-mode' or
;; `global-font-lock-mode'), automatic indentation and filling of
;; comments.
;; This package has (only) been tested with GNU Emacs 21.4 (the latest
;; stable release).
;; Installation:
;; Put this file in a directory where Emacs can find it (`C-h v
;; load-path' for more info). Then add the following lines to your
;; Emacs initialization file:
;; (autoload 'opa-js-mode "opa-js-mode" nil t)
;; (autoload 'opa-classic-mode "opa-mode" nil t)
;; (add-to-list 'auto-mode-alist '("\\.opa$" . opa-js-mode)) ;; <-- Set the default mode here
;; (add-to-list 'auto-mode-alist '("\\.js\\.opa$" . opa-js-mode))
;; (add-to-list 'auto-mode-alist '("\\.classic\\.opa$" . opa-classic-mode))
;; General Remarks:
;; This mode assumes that block comments are not nested inside block
;; comments and that strings do not contain line breaks.
;; Exported names start with "opa-js-" whereas private names start
;; with "js-".
;; Changes:
;; See opa-js.el.changelog.
;;; Code:
(require 'cc-mode)
(require 'font-lock)
(require 'newcomment)
(defmacro inc(a) (list 'setq a (list '1+ a)))
(defmacro dec(a) (list 'setq a (list '1- a)))
(defgroup opa-js nil
"Customization variables for `opa-js-mode'."
:tag "Opa-Js"
:group 'languages)
(defcustom opa-js-indent-level 4
"Number of spaces for each indentation step."
:type 'integer
:group 'opa-js)
(defcustom opa-js-expr-indent-offset 0
"Number of additional spaces used for indentation of continued
expressions. The value must be no less than minus
:type 'integer
:group 'opa-js)
(defcustom opa-js-auto-indent-flag t
"Automatic indentation with punctuation characters. If non-nil, the
current line is indented when certain punctuations are inserted."
:type 'boolean
:group 'opa-js)
;; --- Keymap ---
(defvar opa-js-mode-map nil
"Keymap used in Opa-Js mode.")
(unless opa-js-mode-map
(setq opa-js-mode-map (make-sparse-keymap)))
(when opa-js-auto-indent-flag
(mapc (lambda (key)
(define-key opa-js-mode-map key 'opa-js-insert-and-indent))
'("{" "}" "(" ")" ":" ";" ",")))
(defun opa-js-insert-and-indent (key)
"Run command bound to key and indent current line. Runs the command
bound to KEY in the global keymap and indents the current line."
(interactive (list (this-command-keys)))
(call-interactively (lookup-key (current-global-map) key))
;; --- Syntax Table And Parsing ---
(defvar opa-js-mode-syntax-table-xhtml nil
"Syntax table used in `opa-js-mode' buffers for xhtml constructs.")
(if opa-js-mode-syntax-table-xhtml
(setq opa-js-mode-syntax-table-xhtml (make-syntax-table))
(setq i 0) (while (< i 256)
(modify-syntax-entry i "." opa-js-mode-syntax-table-xhtml)
(inc i))
(defvar opa-js-mode-syntax-table
(let ((table (make-syntax-table)))
(c-populate-syntax-table table)
(modify-syntax-entry ?$ "_" table)
(modify-syntax-entry ?@ "w" table)
(modify-syntax-entry ?\' "w" table)
"Syntax table used in Opa-Js mode.")
(defvar js-ident-as-word-syntax-table
(let ((table (copy-syntax-table opa-js-mode-syntax-table)))
(modify-syntax-entry ?$ "w" table)
(modify-syntax-entry ?% "w" table)
(modify-syntax-entry ?_ "w" table)
(modify-syntax-entry ?\' "w" table)
"Alternative syntax table used internally to simplify detection
of identifiers and keywords and its boundaries.")
(defun js-re-search-forward-inner (regexp &optional bound count)
"Auxiliary function for `js-re-search-forward'."
(let ((parse)
(saved-point (point-min)))
(while (> count 0)
(re-search-forward regexp bound)
(setq parse (parse-partial-sexp saved-point (point)))
(cond ((nth 3 parse)
(concat "\\([^\\]\\|^\\)" (string (nth 3 parse)))
(save-excursion (end-of-line) (point)) t))
((nth 7 parse)
((or (nth 4 parse)
(and (eq (char-before) ?\/) (eq (char-after) ?\*)))
(re-search-forward "\\*/"))
(setq count (1- count))))
(setq saved-point (point))))
(defun js-re-search-forward (regexp &optional bound noerror count)
"Search forward but ignore strings and comments. Invokes
`re-search-forward' but treats the buffer as if strings and
comments have been removed."
(let ((saved-point (point))
(cond ((null count)
'(js-re-search-forward-inner regexp bound 1))
((< count 0)
'(js-re-search-backward-inner regexp bound (- count)))
((> count 0)
'(js-re-search-forward-inner regexp bound count)))))
(condition-case err
(eval search-expr)
(goto-char saved-point)
(unless noerror
(error (error-message-string err)))))))
(defun js-re-search-backward-inner (regexp &optional bound count)
"Auxiliary function for `js-re-search-backward'."
(let ((parse)
(saved-point (point-min)))
(while (> count 0)
(re-search-backward regexp bound)
(when (and (> (point) (point-min))
(save-excursion (backward-char) (looking-at "/[/*]")))
(setq parse (parse-partial-sexp saved-point (point)))
(cond ((nth 3 parse)
(concat "\\([^\\]\\|^\\)" (string (nth 3 parse)))
(save-excursion (beginning-of-line) (point)) t))
((nth 7 parse)
(goto-char (nth 8 parse)))
((or (nth 4 parse)
(and (eq (char-before) ?/) (eq (char-after) ?*)))
(re-search-backward "/\\*"))
(setq count (1- count))))))
(defun js-re-search-backward (regexp &optional bound noerror count)
"Search backward but ignore strings and comments. Invokes
`re-search-backward' but treats the buffer as if strings and
comments have been removed."
(let ((saved-point (point))
(cond ((null count)
'(js-re-search-backward-inner regexp bound 1))
((< count 0)
'(js-re-search-forward-inner regexp bound (- count)))
((> count 0)
'(js-re-search-backward-inner regexp bound count)))))
(condition-case err
(eval search-expr)
(goto-char saved-point)
(unless noerror
(error (error-message-string err)))))))
;; --- Font Lock ---
(defface opa-font-stop-face
'((t (:background "red" :foreground "white")))
"Opa font stop face"
:group 'opa-js-faces)
(defface opa-font-xhtml-face
'((t :inherit font-lock-string-face))
"Opa face to use for XHTML code"
:group 'opa-faces)
(defface opa-font-raw-ident-face
'((t :underline t))
"Opa face for raw idents (between backquotes)"
:group 'opa-faces)
(defface opa-font-doc-directive-face
'((t :foreground "turquoise3"))
"Opa face to use for opadoc directives"
:group 'opa-faces)
(defface opa-font-doc-title-face
'((default (:inherit font-lock-doc-face))
(t (:weight bold)))
"Opa face to use for titles in opadoc"
:group 'opa-faces)
(defface opa-font-directive-face
'((t (:foreground "orangered3")))
"Opa js-like face for directives"
:group 'opa-js-faces)
(defface opa-font-ppdebug-face
'((t (:bold t)))
"Opa js-like face for ppdebug directives"
:group 'opa-js-faces)
(defun js-inside-param-list-p ()
"Return non-nil if point is inside a function parameter list."
(condition-case err
(up-list -1)
(and (looking-at "(")
(progn (backward-word 1)
(or (looking-at "function")
(progn (backward-word 1) (looking-at "function"))))))
(error nil)))
(defconst js-function-heading-1-re
"^[ \t]*function[ \t]+\\(\\w+\\)"
"Regular expression matching the start of a function header.")
(defconst js-function-heading-2-re
"^[ \t]*\\(\\w+\\)[ \t]*:[ \t]*function\\>"
"Regular expression matching the start of a function entry in
an associative array.")
(defvar bident-regexp "[a-zA-Z0-9_]*")
(defvar ident-regexp (concat "[a-zA-Z_']" bident-regexp))
(defvar type-ident-regexp (concat "[a-zA-Z_']" bident-regexp))
(defvar dotted-type-ident-regexp (concat "\\(" ident-regexp "\\.\\)*" type-ident-regexp))
;; OPA directives, bit confused in js-like as to which are preceded by @ and which aren't
;; Here, we allow both for all directives, @private and private will both be highlighted
(defconst opa-directives
'("xml" "typeval" "static_content_directory" "static_resource_directory" "static_source_content"
"static_binary_content" "static_include_directory" "catch" "client" "fail" "typeof" "lazy" "lazy_record"
"thread_context" "with_thread_context" "throw" "track" "wrap" "unwrap" "callcc" "uncps" "atomic" "js_ident"
"expand" "spawn" "wait" "server" "unsafe_cast" "toplevel" "assert" "opensums" "publish" "both" "prefer_client"
"prefer_server" "prefer_both" "both_implem" "private" "public" "package" "nonexpansive" "asynchronous"
"compiletime" "sliced_expr" "may_cps" "llarray" "specialize" "server_private" "opacapi" "stringifier"
"xmlizer" "serializer" "comparator" "abstract" "exposed" "protected" "deprecated" "i18n"))
(defconst opa-all-directives
(mapcar (function (lambda (s) (concat "@" s))) opa-directives))
(defconst js-directive-re
(regexp-opt (append opa-directives opa-all-directives) 'words)
"Regular expression matching OPA directives")
(defconst js-keyword-re
(regexp-opt '("then" "else" "with" "end" "true" "false" "open"
"type" "if" "match" "do" "parser" "xml_parser" "database" "rec" "and" "as" "css" "db" "with"
"function" "recursive" "case" "default" "module" "or" "var"
"import" "package") 'words)
"Regular expression matching any Opa-Js keyword.")
(defconst js-basic-type-re
(regexp-opt '("bool" "float" "int" "string" "void") 'words)
"Regular expression matching any predefined type in Opa-Js.")
(defconst js-constant-re
(regexp-opt '("false" "nil" "true") 'words)
"Regular expression matching any future reserved words in Opa-Js.")
(defconst js-font-lock-keywords-1
(list js-function-heading-1-re 1 font-lock-function-name-face)
(list js-function-heading-2-re 1 font-lock-function-name-face))
"Level one font lock.")
(defconst js-font-lock-keywords-2
(append js-font-lock-keywords-1
(list (list js-keyword-re 1 font-lock-keyword-face)
(cons js-directive-re '(0 'opa-font-directive-face))
;(cons js-basic-type-re font-lock-type-face)
(cons js-constant-re font-lock-constant-face)))
"Level two font lock.")
;; various useful functions
(defun buffer-substring1 (pos)
(buffer-substring pos (1+ pos)))
;;(defun is-in-xhtml-zone (p)
;; (eq (get-text-property p 'syntax-table) opa-js-mode-syntax-table-xhtml))
(defun is-in-ppdebug-zone ()
(eq (get-text-property (point) 'face) 'opa-font-ppdebug-face))
(defun is-in-comment-zone ()
(let ((prop (get-text-property (point) 'face)))
(or (eq prop font-lock-comment-face)
(eq prop font-lock-doc-face))))
(defun is-in-strict-comment-zone ()
(eq (get-text-property (point) 'face) font-lock-comment-face))
(defun is-in-doc-zone ()
(eq (get-text-property (point) 'face) font-lock-doc-face))
(defun is-in-keyword-zone-with-point (p)
(eq (get-text-property p 'face) font-lock-keyword-face))
(defun is-in-keyword-zone ()
(is-in-keyword-zone-with-point (point)))
(defun is-in-string-zone ()
(eq (get-text-property (point) 'face) font-lock-string-face))
(defun is-in-type-zone ()
(eq (get-text-property (point) 'face) font-lock-type-face))
(defun re-search-forward--skipping-comments (re end)
(let ((found nil))
(while (and (not found) (re-search-forward re end t))
(setq found (not (is-in-comment-zone))))
(defun re-search-forward--skipping-strings-comments-ppdebug (re end)
(let ((found nil))
(while (and (not found) (re-search-forward re end t))
(setq found (not (or (is-in-comment-zone) (is-in-string-zone) (is-in-ppdebug-zone)))))
;; xhtml parsing and setting face property
; returns the beginning position and sets (point) to the end position
(defun find-nested--skipping-strings-comments (re_open re_close end)
(if (re-search-forward--skipping-strings-comments-ppdebug re_open end)
(let ((b (point))
(re (concat re_open "\\|" re_close))
(deep 1))
(while (and (< (point) end) (re-search-forward--skipping-strings-comments-ppdebug re end))
;(message (concat "find-nested--skipping-strings-comments found at " (int-to-string (point)) " deep is " (int-to-string deep)))
(goto-char (match-beginning 0))
(if (looking-at re_close)
(if (= (dec deep) 0) (setq end (point)))
(inc deep))
(forward-char) ; move to the next char otherwise we will search at the same place
(defun skip-attributes ()
(while (looking-at " +[a-zA-Z][a-zA-Z0-9_:-]* *= *")
(goto-char (match-end 0))
(cond ((looking-at "\"[^\"]*\"")
(goto-char (match-end 0)))
((looking-at "'[^\']*'")
(goto-char (match-end 0)))
((looking-at "{[^}]*}")
(goto-char (match-end 0)))
(t (re-search-forward "[ \t/<>]")
;; starting from point being just after opening tag "tag", search the closing tag
(defun search-xhtml-end (tag)
(if (and (not (equal tag "")) (looking-at "[ \n\t]*/>"))
; <tag/> format
(match-end 0)
(let ((re (concat "</?\\(" tag "\\)?>"))
(end (1- (point-max)))
(deep 1))
(while (and (< (point) end) (re-search-forward--skipping-comments re (point-max)))
;(message (concat "search-xhtml-end looking for " tag " found at " (int-to-string (point)) " deep is " (int-to-string deep)))
(if (equal (buffer-substring1 (1+ (match-beginning 0))) "/")
(if (= (dec deep) 0) (setq end (match-end 0)))
(inc deep)))
;(message (concat "search-xhtml-end looking for " tag " found at " (int-to-string (point)) " deep is " (int-to-string deep)))
(goto-char end)
;; search an opening tag before "end"
(defun search-xhtml-beg-raw (end)
(let ((found nil))
(while (and (not found) )
(setq found (not (is-in-comment-zone))))
(defun search-xhtml-beg (end)
(let ((found (re-search-forward--skipping-strings-comments-ppdebug "<\\([a-zA-Z][a-zA-Z0-9:-]*\\|>\\)" end)))
(if (and found (equal (buffer-substring1 (1- (point))) ">"))
(defun set-xhtml-property (beg end)
(put-text-property beg end 'syntax-table opa-js-mode-syntax-table-xhtml)
(put-text-property beg end 'face 'opa-font-xhtml-face)
(put-text-property beg end 'font-lock-multiline t)
(goto-char beg)
(while (re-search-forward--skipping-strings-comments-ppdebug "<\\(/?[a-zA-Z][a-zA-Z0-9-]* */?\\)\\|/>" end)
(if (equal (buffer-substring1 (match-beginning 0)) "<")
(put-text-property (match-beginning 1) (match-end 1) 'face 'font-lock-keyword-face)
; colorize the "/" in "<zzzz .... />"
(put-text-property (match-beginning 0) (1+ (match-beginning 0)) 'face 'font-lock-keyword-face))))
(defun set-xhtml-except-braces (beg end)
(goto-char beg)
(let ((beg_brace nil))
(while (setq beg_brace (find-nested--skipping-strings-comments "[^\\]{" "[^\\]}" end))
(set-xhtml-property beg beg_brace)
(setq beg (point))))
(set-xhtml-property beg end))
(defun opa-highlights-xhtml (end)
;(message (concat "opa-highlights-xhtml on " (int-to-string start) ".." (int-to-string end)))
(if (search-xhtml-beg end)
(let* ((b (match-beginning 0))
(tag (buffer-substring (1+ b) (point)))
(e (search-xhtml-end tag)))
;(message (concat "setting xhtml on " (int-to-string b) ".." (int-to-string e)))
(set-xhtml-except-braces b e)
(defun pnt (str) (message "%s" (concat str ": point=\"" (buffer-substring (point) (+ (point) 20)) "\"")))
(defun mtch (str) (message "%s" (concat str ": match=\"" (buffer-substring (match-beginning 0) (match-end 0)) "\"")))
(defun mtch-ft (str from to) (message "%s" (concat str ": match=\"" (buffer-substring from to) "\"")))
(defun match-opa-record-type-element (limit)
(when (match-opa-type limit)
(when (and (looking-at (concat " *" ident-regexp))
(goto-char (match-end 0)))
(defun match-opa-record-type (limit)
(when (and (looking-at "{ *")
(goto-char (match-end 0))
(match-opa-record-type-element limit))
(while (and (looking-at " *, *")
(goto-char (match-end 0))
(match-opa-record-type-element limit)))
(when (looking-at " *}")
(goto-char (match-end 0)))))
(defun match-opa-tuple-type (limit)
(when (and (looking-at "( *")
(goto-char (match-end 0))
(match-opa-type limit))
(while (and (looking-at " *, *")
(goto-char (match-end 0))
(match-opa-type limit)))
(when (looking-at " *)")
(goto-char (match-end 0)))))
(defun match-opa-simple-type (limit)
(when (looking-at dotted-type-ident-regexp)
(goto-char (match-end 0))
(let ((data (match-data)))
(if (match-opa-tuple-type limit)
(set-match-data data)
(defun match-opa-param-type (limit)
(when (looking-at dotted-type-ident-regexp)
(goto-char (match-end 0))
(when (and (looking-at " *")
(goto-char (match-end 0))
(match-opa-tuple-type limit)))))
(defun match-opa-nonfun-type (limit)
((match-opa-simple-type limit) t)
((match-opa-tuple-type limit) t)
((match-opa-record-type limit) t)
((match-opa-param-type limit) t)
(t nil)))
;; parsing the lhs of an arrow types ie a comma separated list (perhaps empty) of types
;; @return -1 if nothing was parsed
;; otherwise, the position of the end of the first type parsed
;; (ie before the first comma, if any)
(defun match-opa-arrow-lhs (limit)
(let ((before-first-comma -1))
(when (match-opa-nonfun-type limit)
(setq before-first-comma (match-end 0))
(while (and (looking-at " *, *")
(goto-char (match-end 0))
(match-opa-nonfun-type limit))))
;; not parsing a -> b -> c on purpose because is it not valid syntax (anymore)
;; if you modify it, beware that you must parse [a -> c], [a,b -> c], [-> c]
;; but NOT [a,b] or []
(defun match-opa-type2 (limit)
(let ((before-first-comma (match-opa-arrow-lhs limit)))
(if (and (looking-at " *-> *") ;; if you see an arrow, parse it as a type
(goto-char (match-end 0))
(match-opa-nonfun-type limit))
(progn (goto-char (match-end 0)) t)
;; if you don't see any arrow, two choices
(if (= before-first-comma -1)
;; you didn't parse anything, so you fail in parsing the type
;; you parsed one type (and possibly others with separated commas)
;; use the first one of these types: in [ident:a,b], only [a]
;; is a valid type since no arrow follows
(set-match-data (list before-first-comma before-first-comma))
;; setting match-data with a wierd value but the following
;; function will read just the second value anyway
(defun match-opa-type (limit)
;(pnt "match-opa-type")
((match-opa-type2 limit) t)
((match-opa-simple-type limit) t)
((match-opa-tuple-type limit) t)
((match-opa-record-type limit) t)
((match-opa-param-type limit) t)
(t nil)))
(defun match-variable-declaration (limit)
;(message "match-variable-declaration ")
(when (re-search-forward "\\<\\(var\\)\\> *" limit t)
;(mtch "match-variable-declaration")
(goto-char (match-end 0))
(let ((start (match-end 0)))
;(mtch-ft "match-variable-declaration(start)" start (+ start 20))
(when (match-opa-type limit)
(let ((end (match-end 0)))
;(mtch-ft "match-variable-declaration(end)" (- end 20) end)
(when (looking-at "[ \t]*\\([a-zA-Z0-9_,()]+\\)[ \t]*\\([=;].*\\|/[/*]\\|$\\)")
;(mtch-ft "match-variable-declaration type" start end)
;(mtch-ft "match-variable-declaration var" (match-beginning 1) (match-end 1))
(set-match-data (list start end (match-beginning 1) (match-end 1)))
(<= end limit)))))))
(defun match-variable-assign (limit)
(when (and (re-search-forward " *(" limit t)
(goto-char (match-end 0)))
(let ((start (match-end 0)))
(when (match-opa-type limit)
(let ((end (match-end 0)))
(when (looking-at "[ \t]*)[ \t]*\\([a-zA-Z0-9_,()]+\\)[ \t]*\\([=;].*\\|/[/*]\\|$\\)")
(set-match-data (list start end (match-beginning 1) (match-end 1)))
(<= end limit)))))))
(defun match-opa-doc-directive-aux (limit)
(if (re-search-forward "@[a-zA-Z]+" limit t)
(if (is-in-doc-zone) 'succeed 'continue)
(defun match-opa-doc-title-aux (limit)
(if (re-search-forward "{[0-9]+\\([^}]*\\)}" limit t)
(if (is-in-doc-zone) 'succeed 'continue)
(defun skip-coercion-and-comments (limit)
(let ((continue t))
(while (and continue (< (point) limit))
(looking-at "\s*")
(goto-char (match-end 0))
;(if (looking-at ":\s*");; <-- FIX, need typedef regex
; (goto-char (match-end 0))
(if (or (is-in-comment-zone) (is-in-type-zone))
(setq continue nil)))));)
(defun match-opa-binding-aux (limit)
;; matching a.b.c so that in {r with a.b.c : 1} a.b.c highlighted in pink
(if (re-search-forward (concat "\\<" ident-regexp "\\>" "\\(\\.\\<" ident-regexp "\\>\\)*") limit t)
(let ((begin (match-beginning 0)))
(skip-coercion-and-comments limit)
(if (and (looking-at "\s*\\(:\\)\\([a-zA-Z_0-9 ]\\|$\\)") (< (point) limit))
(let ((end (match-end 1)))
(set-match-data (list begin end))
(defun match-wrapper (f limit)
(let ((result)
(continue t))
(while continue
(let ((res (funcall f limit)))
(if (eq res 'continue)
(if (eq res 'succeed)
(setq result t)
(setq continue nil))
(progn ; res = 'stop
(setq result nil)
(setq continue nil))))))
(defun match-opa-doc-directive (limit)
(match-wrapper 'match-opa-doc-directive-aux limit))
(defun match-opa-binding (limit)
(match-wrapper 'match-opa-binding-aux limit))
(defun match-opa-doc-title (limit)
(match-wrapper 'match-opa-doc-title-aux limit))
(defun match-invalid-space-aux (limit)
(if (re-search-forward "[a-zA-Z0-9_)]\\( *\\)([^*]" limit t)
(if (is-in-keyword-zone-with-point (match-beginning 0))
; if (1 == 2) shouldn't complain because of the space after "if"
(defun match-invalid-space (limit)
(match-wrapper 'match-invalid-space-aux limit))
;; Limitations with variable declarations: There seems to be no
;; sensible way to highlight variables occuring after an initialized
;; variable in a variable list. For instance, in
;; var x, y = f(a, b), z
;; z will not be highlighted. Also, in variable declaration lists
;; spanning several lines only variables on the first line will be
;; highlighted. To get correct fontification, every line with variable
;; declarations must contain a `var' keyword.
(defconst js-font-lock-keywords-3
; bypasses (must be done before other rules in case the bypass contains weird chars, eg: %%+%%)
(cons "%%[^%]*%%" '(0 'font-lock-string-face))
;; ppdebug
(cons "#<[^>]*>" '(0 'opa-font-ppdebug-face))
;; var declarations with types: var typ nam = ...
'(match-variable-declaration . '((0 font-lock-type-face) (1 font-lock-variable-name-face)))
;; assignments with types (typ) name = ...
'(match-variable-assign . '((0 font-lock-type-face) (1 font-lock-variable-name-face)))
;; subrule name (parser)
(cons (concat "\\(" ident-regexp "=\\)") '(0 font-lock-builtin-face))
;; some more operators
(cons "\\(->\\|<-\\|-\\)" 0)
;; invalid spaces between function name and open parenthesis
'(match-invalid-space . '(1 'opa-font-stop-face))
;; opa-doc directives
(cons 'match-opa-doc-directive '(0 'opa-font-doc-directive-face t))
(cons 'match-opa-doc-title '(1 'opa-font-doc-title-face t))
;; xhtml
;; variable declarations
; (concat "\\<\\(const\\|var\\)\\>\\|" js-basic-type-re)
; (list "\\(\\w+\\)[ \t]*\\([=;].*\\|\\<in\\>.*\\|,\\|/[/*]\\|$\\)"
; nil
; nil
; '(1 font-lock-variable-name-face)))
;; function call
;; must come after types since list('a) is a type
(cons (concat "\\(" ident-regexp "\\(\\." ident-regexp "\\)*\\)(") '(1 font-lock-function-name-face))
;; dot call
;; must come after function call
(cons (concat "\\." ident-regexp) '(0 font-lock-constant-face))
;; formal parameters
"\\<function\\>\\([ \t]+\\w+\\)?[ \t]*([ \t]*\\w"
(list "\\(\\w+\\)\\([ \t]*).*\\)?"
'(1 font-lock-variable-name-face)))
;; continued formal parameter list
"^[ \t]*\\w+[ \t]*[,)]"
(list "\\w+"
'(if (save-excursion (backward-char) (js-inside-param-list-p))
(backward-word 1)
'(0 font-lock-variable-name-face)))
"Level three font lock.")
(defconst js-font-lock-keywords
'(js-font-lock-keywords-3 js-font-lock-keywords-1 js-font-lock-keywords-2 js-font-lock-keywords-3)
"See `font-lock-keywords'.")
(defconst js-font-lock-syntactic-keywords
'(("[=(][ \t\n]*\\(/\\)[^/*]\\(.*?[^\\]\\)?\\(/\\)" (1 '(7)) (3 '(7)))
("##\\(register\\|extern-type\\)[^\n]*" 0 " ")
"Highlighting of regular expressions. See also the variable
;; --- Indentation ---
(defconst js-possibly-braceless-keyword-re
'("else" "if" "try" "with")
"Regular expression matching keywords that are optionally
followed by an opening brace.")
(defconst js-indent-operator-re
(concat "[-+*/<>=&^|?:.]\\([^-+*/]\\|$\\)")
"Regular expression matching operators that affect indentation
of continued expressions.")
(defun js-looking-at-operator-p ()
"Return non-nil if text after point is an operator (that is not a comma)."
(let ((res
;(pnt "js-looking-at-operator-p")
(and (looking-at js-indent-operator-re)
(or (not (looking-at ":"))
(and (js-re-search-backward "[?:{]\\|\\<case\\>" nil t)
(looking-at "?")))))))))
;(message (concat "js-looking-at-operator-p" " res " (if res "t" "nil")))
(defun js-continued-expression-p ()
"Returns non-nil if the current line continues an expression."
;(pnt "js-continued-expression-p 1")
(or (js-looking-at-operator-p)
(and (js-re-search-backward "\n" nil t)
(skip-chars-backward " \t")
(and (> (point) (point-min))
(save-excursion (backward-char) (not (looking-at "[/*]/")))
(and (progn (backward-char)
(not (looking-at "++\\|--\\|/[/*]"))))))))))
(defun js-end-of-do-while-loop-p ()
"Returns non-nil if word after point is `while' of a do-while
statement, else returns nil. A braceless do-while statement
spanning several lines requires that the start of the loop is
indented to the same column as the current line."
(when (looking-at "\\s-*\\<while\\>")
(if (save-excursion
(skip-chars-backward "[ \t\n]*}")
(looking-at "[ \t\n]*}"))
(backward-list) (backward-word 1) (looking-at "\\<do\\>"))
(js-re-search-backward "\\<do\\>" (point-at-bol) t)
(or (looking-at "\\<do\\>")
(let ((saved-indent (current-indentation)))
(while (and (js-re-search-backward "^[ \t]*\\<" nil t)
(/= (current-indentation) saved-indent)))
(and (looking-at "[ \t]*\\<do\\>")
(not (js-re-search-forward
"\\<while\\>" (point-at-eol) t))
(= (current-indentation) saved-indent)))))))))
(defun js-ctrl-statement-indentation ()
"Returns the proper indentation of the current line if it
starts the body of a control statement without braces, else
returns nil."
;(message "start js-ctrl-statement-indentation")
(when (save-excursion
(and (not (looking-at "[{]"))
(js-re-search-backward "[[:graph:]]" nil t)
(when (= (char-before) ?\)) (backward-list))
(skip-syntax-backward " ")
(skip-syntax-backward "w")
(looking-at js-possibly-braceless-keyword-re))
(not (js-end-of-do-while-loop-p))))
;(message "js-ctrl-statement-indentation succeed")
(goto-char (match-beginning 0))
(+ (current-indentation) opa-js-indent-level)))))
(defun js-proper-indentation (parse-status)
"Return the proper indentation for the current line."
;(message "js-proper-indentation")
(let ((ctrl-stmt-indent (js-ctrl-statement-indentation))
(same-indent-p (looking-at "[]})]\\|\\<case\\>\\|\\<default\\>"))
(continued-expr-p (js-continued-expression-p)))
(cond (ctrl-stmt-indent)
((nth 1 parse-status)
(goto-char (nth 1 parse-status))
(if (looking-at "[({[][ \t]*\\(/[/*]\\|$\\)")
;(pnt "open bracket at end of line")
(skip-syntax-backward " ")
(when (= (char-before) ?\)) (backward-list))
(cond (same-indent-p
;(pnt "current column 1")
;(pnt "continued expr")
(+ (current-column) (* 2 opa-js-indent-level)
;(pnt "not continued expr")
;(message (concat "currentcol " (int-to-string (current-column))))
(+ (current-column) opa-js-indent-level))))
(unless same-indent-p
(skip-chars-forward " \t"))
;(pnt "current column 1")
(continued-expr-p (+ opa-js-indent-level
(t 0)))))
(defun b2s (s)
(cond ((booleanp s) (if s "t" "nil"))
((numberp s) (int-to-string s))
((stringp s) s)
((sequencep s) "sequence")
(t (type-of s))))
(defun opa-js-indent-line ()
"Indent the current line as Opa-Js source text."
;(message "opa-js-indent-line")
(with-syntax-table js-ident-as-word-syntax-table
(let ((parse-status
(save-excursion (parse-partial-sexp (point-min) (point-at-bol))))
(offset (- (current-column) (current-indentation))))
(cond ((nth 4 parse-status)
(let ((base (save-excursion
(re-search-backward "/\\*" (point-min) t)
(indent-line-to (+ base 1)))
(when (> offset 0) (forward-char offset)))
((not (nth 8 parse-status))
; (message (concat "indent"
; " depth " (b2s (nth 0 parse-status))
; " innerlist " (b2s (nth 1 parse-status))
; " sexplast " (b2s (nth 2 parse-status))
; " instring " (b2s (nth 3 parse-status))
; " incomment " (b2s (nth 4 parse-status))
; " afterquote " (b2s (nth 5 parse-status))
; " minparen " (b2s (nth 6 parse-status))
; " abcomment " (b2s (nth 7 parse-status))
; " lstcomstr " (b2s (nth 8 parse-status))
; " intdata " (b2s (nth 9 parse-status))
; ))
(indent-line-to (js-proper-indentation parse-status))
(when (> offset 0) (forward-char offset)))))))
;; --- Filling ---
;; FIXME: It should be possible to use the more sofisticated function
;; `c-fill-paragraph' in `cc-cmds.el' instead. However, just setting
;; `fill-paragraph-function' to `c-fill-paragraph' does not work;
;; inside `c-fill-paragraph', `fill-paragraph-function' evaluates to
;; nil!?
(defun js-backward-paragraph ()
"Move backward to start of paragraph. Postcondition: Point is at
beginning of buffer or the previous line contains only whitespace."
(forward-line -1)
(while (not (or (bobp) (looking-at "^[ \t]*$")))
(forward-line -1))
(when (not (bobp)) (forward-line 1)))
(defun js-forward-paragraph ()
"Move forward to end of paragraph. Postcondition: Point is at
end of buffer or the next line contains only whitespace."
(forward-line 1)
(while (not (or (eobp) (looking-at "^[ \t]*$")))
(forward-line 1))
(when (not (eobp)) (backward-char 1)))
(defun js-fill-block-comment-paragraph (parse-status justify)
"Fill current paragraph as a block comment. PARSE-STATUS is the
result of `parse-partial-regexp' from beginning of buffer to
point. JUSTIFY has the same meaning as in `fill-paragraph'."
(let ((offset (save-excursion
(goto-char (nth 8 parse-status)) (current-indentation))))
(narrow-to-region (save-excursion
(goto-char (nth 8 parse-status)) (point-at-bol))
(goto-char (nth 8 parse-status))
(re-search-forward "*/")))
(narrow-to-region (save-excursion
(when (looking-at "^[ \t]*$") (forward-line 1))
(when (looking-at "^[ \t]*$") (backward-char))
(goto-char (point-min))
(while (not (eobp))
(forward-line 1))
(let ((fill-column (- fill-column offset))
(fill-paragraph-function nil))
(fill-paragraph justify))
;; In Emacs 21.4 as opposed to CVS Emacs 22,
;; `fill-paragraph' seems toadd a newline at the end of the
;; paragraph. Remove it!
(goto-char (point-max))
(when (looking-at "^$") (backward-delete-char 1))
(goto-char (point-min))
(while (not (eobp))
(indent-to offset)
(forward-line 1))))))
(defun js-sline-comment-par-start ()
"Return point at the beginning of the line where the current
single-line comment paragraph starts."
(while (and (not (bobp))
(looking-at "^[ \t]*//[ \t]*[[:graph:]]"))
(forward-line -1))
(unless (bobp) (forward-line 1))
(defun js-sline-comment-par-end ()
"Return point at end of current single-line comment paragraph."
(while (and (not (eobp))
(looking-at "^[ \t]*//[ \t]*[[:graph:]]"))
(forward-line 1))
(unless (bobp) (backward-char))
(defun js-sline-comment-offset (line)
"Return the column at the start of the current single-line
comment paragraph."
(goto-line line)
(re-search-forward "//" (point-at-eol))
(goto-char (match-beginning 0))
(defun js-sline-comment-text-offset (line)
"Return the column at the start of the text of the current
single-line comment paragraph."
(goto-line line)
(re-search-forward "//[ \t]*" (point-at-eol))
(defun js-at-empty-sline-comment-p ()
"Return non-nil if inside an empty single-line comment."
(and (save-excursion
(not (looking-at "^.*//.*[[:graph:]]")))
(re-search-backward "//" (point-at-bol) t))))
(defun js-fill-sline-comments (parse-status justify)
"Fill current paragraph as a sequence of single-line comments.
PARSE-STATUS is the result of `parse-partial-regexp' from
beginning of buffer to point. JUSTIFY has the same meaning as in
(when (not (js-at-empty-sline-comment-p))
(let* ((start (js-sline-comment-par-start))
(start-line (1+ (count-lines (point-min) start)))
(end (js-sline-comment-par-end))
(offset (js-sline-comment-offset start-line))
(text-offset (js-sline-comment-text-offset start-line)))
(narrow-to-region start end)
(goto-char (point-min))
(while (re-search-forward "^[ \t]*//[ \t]*" nil t)
(replace-match "")
(forward-line 1))
(let ((fill-paragraph-function nil)
(fill-column (- fill-column text-offset)))
(fill-paragraph justify))
;; In Emacs 21.4 as opposed to CVS Emacs 22,
;; `fill-paragraph' seems to add a newline at the end of the
;; paragraph. Remove it!
(goto-char (point-max))
(when (looking-at "^$") (backward-delete-char 1))
(goto-char (point-min))
(while (not (eobp))
(indent-to offset)
(insert "//")
(indent-to text-offset)
(forward-line 1)))))))
(defun js-trailing-comment-p (parse-status)
"Return non-nil if inside a trailing comment. PARSE-STATUS is
the result of `parse-partial-regexp' from beginning of buffer to
(when (nth 4 parse-status)
(goto-char (nth 8 parse-status))
(skip-chars-backward " \t")
(not (bolp)))))
(defun js-block-comment-p (parse-status)
"Return non-nil if inside a block comment. PARSE-STATUS is the
result of `parse-partial-regexp' from beginning of buffer to
(when (nth 4 parse-status)
(goto-char (nth 8 parse-status))
(looking-at "/\\*")))))
(defun opa-js-fill-paragraph (&optional justify)
"If inside a comment, fill the current comment paragraph.
Trailing comments are ignored."
(let ((parse-status (parse-partial-sexp (point-min) (point))))
(when (and (nth 4 parse-status)
(not (js-trailing-comment-p parse-status)))
(if (js-block-comment-p parse-status)
(js-fill-block-comment-paragraph parse-status justify)
(js-fill-sline-comments parse-status justify))))
;; --- Imenu ---
(defconst js-imenu-generic-expression
"Regular expression matching top level procedures. Used by imenu.")
;; --- Main Function ---
(defun opa-js-mode ()
"Major mode for editing Opa-Js source text.
Key bindings:
(use-local-map opa-js-mode-map)
(set-syntax-table opa-js-mode-syntax-table)
(set (make-local-variable 'indent-line-function) 'opa-js-indent-line)
(unless (featurep 'xemacs)
(set (make-local-variable 'font-lock-defaults)
(list js-font-lock-keywords
nil nil '((?$ . "w") (?_ . "w")) nil
'(font-lock-syntactic-keywords . js-font-lock-syntactic-keywords))))
(set (make-local-variable 'parse-sexp-ignore-comments) t)
;; Comments
(set (make-local-variable 'comment-start) "// ")
(set (make-local-variable 'comment-end) "")
(set (make-local-variable 'fill-paragraph-function)
;; Imenu
(setq imenu-case-fold-search nil)
(set (make-local-variable 'imenu-generic-expression)
(imenu-add-to-menubar "Functions")
(setq major-mode 'opa-js-mode)
(setq mode-name "Opa-Js")
(run-hooks 'opa-js-mode-hook))
(provide 'opa-js-mode)
;;; opa-js-mode.el ends here
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