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;;; scad-mode.el --- SCAD mode derived mode
;; Author: Len Trigg
;; Maintainer: Len Trigg <lenbok@gmail.com>
;; Created: March 2010
;; Modified: 06 July 2012
;; Keywords: languages
;; URL: https://raw.github.com/openscad/openscad/master/contrib/scad-mode.el
;; Version: 90.0
;; This program 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 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;
;; This is a major-mode to implement the SCAD constructs and
;; font-locking for openscad
;;
;; If installing manually, insert the following into your emacs startup:
;;
;; (autoload 'scad-mode "scad-mode" "Major mode for editing SCAD code." t)
;; (add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
;;
;; or
;;
;; install from marmalade: http://marmalade-repo.org/
;; M-x install-package <ENTER> scad-mode <ENTER>
;;; To Do:
;; - Support for background/debug/root/disable modifiers
;; - Font lock of non-built-in function calls
;;; Code:
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
(defcustom scad-command
'"openscad"
"Path to openscad executable"
:type 'string
)
(defcustom scad-keywords
'("return" "true" "false")
"SCAD keywords."
:type 'list
:group 'scad-font-lock)
(defcustom scad-functions
'("cos" "acos" "sin" "asin" "tan" "atan" "atan2" ;;func.cc
"abs" "sign" "rands" "min" "max"
"round" "ceil" "floor"
"pow" "sqrt" "exp" "log" "ln"
"str"
"lookup" "version" "version_num"
"dxf_dim" "dxf_cross" ;;dxfdim.cc
)
"SCAD functions."
:type 'list
:group 'scad-font-lock)
(defcustom scad-modules
'("child" "echo" "assign" "for" "intersection_for" "if" ;;control.cc
"cube" "sphere" "cylinder" "polyhedron" "square" "circle" "polygon" ;;primitives.cc
"scale" "rotate" "translate" "mirror" "multmatrix" ;;transform.cc
"union" "difference" "intersection" ;;csgops.cc
"render" ;;render.cc
"color" ;;color.cc
"surface" ;;surface.cc
"dxf_linear_extrude" "linear_extrude" ;;linearextrude.cc
"dxf_rotate_extrude" "rotate_extrude" ;;rotateextrude.cc
"import_stl" "import_off" "import_dxf" "import" ;;import.cc
"group" ;;builtin.cc
"projection" ;;projection.cc
"minkowski" "glide" "subdiv" "hull" ;;cgaladv.cc
)
"SCAD modules."
:type 'list
:group 'scad-font-lock)
(defcustom scad-operators
'("+" "-" "*" "/" "%"
"&&" "||" "!"
"<" "<=" "==" "!=" ">" ">="
"?" ":" "=")
"SCAD operators."
:type 'list
:group 'scad-font-lock)
(defvar scad-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\t" 'scad-indent-line)
(define-key map [(control c) (control o)] 'scad-open-current-buffer)
(define-key map [return] 'newline-and-indent)
map)
"Keymap for `scad-mode'.")
(defvar scad-mode-syntax-table
(let ((st (make-syntax-table)))
;; support comment style: “// ...”
;; support comment style: “/* ... */”
(modify-syntax-entry ?\/ ". 124b" st)
(modify-syntax-entry ?\n "> b" st)
(modify-syntax-entry ?* ". 23" st)
;; Extra punctuation
(modify-syntax-entry ?+ "." st)
(modify-syntax-entry ?- "." st)
(modify-syntax-entry ?% "." st)
(modify-syntax-entry ?< "." st)
(modify-syntax-entry ?> "." st)
(modify-syntax-entry ?& "." st)
(modify-syntax-entry ?: "." st)
(modify-syntax-entry ?| "." st)
(modify-syntax-entry ?= "." st)
(modify-syntax-entry ?\; "." st)
;; _ allowed in word (alternatively "_" as symbol constituent?)
(modify-syntax-entry ?_ "w" st)
st)
"Syntax table for `scad-mode'.")
(defvar scad-keywords-regexp (regexp-opt scad-keywords 'words))
(defvar scad-modules-regexp (regexp-opt scad-modules 'words))
(defvar scad-functions-regexp (regexp-opt scad-functions 'words))
(defvar scad-operators-regexp (regexp-opt scad-operators))
(defvar scad-font-lock-keywords
`(
("\\(module\\|function\\)[ \t]+\\(\\sw+\\)" (1 'font-lock-keyword-face nil) (2 'font-lock-function-name-face nil t))
("<\\(\\sw+\\)>" (1 'font-lock-builtin-face nil))
("$\\(\\sw+\\)" (1 'font-lock-builtin-face nil))
(,scad-keywords-regexp . font-lock-keyword-face)
(,scad-modules-regexp . font-lock-builtin-face)
(,scad-functions-regexp . font-lock-function-name-face)
;(,scad-operators-regexp . font-lock-operator-face) ;; This actually looks pretty ugly
;("\\(\\<\\S +\\>\\)\\s *(" 1 font-lock-function-name-face t) ;; Seems to override other stuff (e.g. in comments and builtins)
)
"Keyword highlighting specification for `scad-mode'.")
;(defvar scad-imenu-generic-expression ...)
;(defvar scad-outline-regexp ...)
;;;###autoload
(define-derived-mode scad-mode fundamental-mode "SCAD"
"A major mode for editing SCAD files."
:syntax-table scad-mode-syntax-table
(set (make-local-variable 'font-lock-defaults) '(scad-font-lock-keywords))
(set (make-local-variable 'indent-line-function) 'scad-indent-line)
;(set (make-local-variable 'imenu-generic-expression) scad-imenu-generic-expression)
;(set (make-local-variable 'outline-regexp) scad-outline-regexp)
;; set comment styles for scad mode
(set (make-local-variable 'comment-start) "//")
(set (make-local-variable 'comment-end) "")
(set (make-local-variable 'block-comment-start) "/*")
(set (make-local-variable 'block-comment-end) "*/")
)
;;; Indentation, based on http://www.emacswiki.org/emacs/download/actionscript-mode-haas-7.0.el
(defun scad-indent-line ()
"Indent current line of SCAD code."
(interactive)
(let ((savep (> (current-column) (current-indentation)))
(indent (condition-case nil (max (scad-calculate-indentation) 0)
(error 0))))
(if savep
(save-excursion (indent-line-to indent))
(indent-line-to indent))))
(defun scad-calculate-indentation ()
"Return the column to which the current line should be indented."
(save-excursion
(scad-maybe-skip-leading-close-delim)
(let ((pos (point)))
(beginning-of-line)
(if (not (search-backward-regexp "[^\n\t\r ]" 1 0))
0
(progn
(scad-maybe-skip-leading-close-delim)
(+ (current-indentation) (* standard-indent (scad-count-scope-depth (point) pos))))))))
(defun scad-maybe-skip-leading-close-delim ()
(beginning-of-line)
(forward-to-indentation 0)
(if (looking-at "\\s)")
(forward-char)
(beginning-of-line)))
(defun scad-face-at-point (pos)
"Return face descriptor for char at point."
(plist-get (text-properties-at pos) 'face))
(defun scad-count-scope-depth (rstart rend)
"Return difference between open and close scope delimeters."
(save-excursion
(goto-char rstart)
(let ((open-count 0)
(close-count 0)
opoint)
(while (and (< (point) rend)
(progn (setq opoint (point))
(re-search-forward "\\s)\\|\\s(" rend t)))
(if (= opoint (point))
(forward-char 1)
(cond
;; Don't count if in string or comment.
((scad-face-at-point (- (point) 1)))
((looking-back "\\s)")
(incf close-count))
((looking-back "\\s(")
(incf open-count))
)))
(- open-count close-count))))
(defun scad-open-current-buffer ()
(interactive)
(call-process scad-command nil 0 nil (buffer-file-name)))
(provide 'scad)
;;; scad-mode.el ends here
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