mirror of https://github.com/vitalif/openscad
Emacs major mode by Len Trigg
git-svn-id: http://svn.clifford.at/openscad/trunk@512 b57f626f-c46c-0410-a088-ec61d464b74cstl_dim
kintel
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;;; scad.el --- SCAD mode derived mode
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;; Author: Len Trigg
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;; Maintainer: Len Trigg <lenbok@gmail.com>
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;; Created: March 2010
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;; Modified: March 2010
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;; Version: $Revision: 88 $
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;
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;; This is a separate mode to implement the SCAD constructs and
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;; font-locking.
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;;
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;; To use, insert the following into your emacs startup:
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;;
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;; (autoload 'scad-mode "scad" "Major mode for editing SCAD code." t)
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;; (add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
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;;; To Do:
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;; - Support for background/debug/root/disable modifiers
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;; - Font lock of non-built-in function calls
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;;; Autoload mode trigger
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(add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
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(defcustom scad-keywords
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'("return" "true" "false")
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"SCAD keywords."
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:type 'list
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:group 'scad-font-lock)
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(defcustom scad-functions
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'("cos" "acos" "sin" "asin" "tan" "atan"
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"pow" "log" "ln"
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"abs" "min" "max" "sqrt" "round" "ceil" "floor" "lookup"
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"str"
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"dxf_dim" "dxf_cross"
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)
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"SCAD functions."
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:type 'list
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:group 'scad-font-lock)
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(defcustom scad-modules
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'("for" "if" "assign" "intersection_for"
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"echo"
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"cube" "sphere" "cylinder" "polyhedron"
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"scale" "rotate" "translate" "mirror" "multmatrix" "color"
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"union" "difference" "intersection" "render" "surface"
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"square" "circle" "polygon" "dxf_linear_extrude" "linear_extrude" "dxf_rotate_extrude" "rotate_extrude"
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"import_stl" "import_off" "import_dxf" "group"
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"projection" "minkowski" "glide" "subdiv" "child"
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)
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"SCAD modules."
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:type 'list
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:group 'scad-font-lock)
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(defcustom scad-operators
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'("+" "-" "*" "/" "%"
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"&&" "||" "!"
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"<" "<=" "==" "!=" ">" ">="
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"?" ":" "=")
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"SCAD operators."
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:type 'list
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:group 'scad-font-lock)
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(defvar scad-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map "\t" 'scad-indent-line)
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(define-key map [return] 'newline-and-indent)
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map)
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"Keymap for `scad-mode'.")
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(defvar scad-mode-syntax-table
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(let ((st (make-syntax-table)))
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;; support comment style: “// ...”
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;; support comment style: “/* ... */”
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(modify-syntax-entry ?\/ ". 124b" st)
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(modify-syntax-entry ?\n "> b" st)
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(modify-syntax-entry ?* ". 23" st)
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;; Extra punctuation
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(modify-syntax-entry ?+ "." st)
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(modify-syntax-entry ?- "." st)
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(modify-syntax-entry ?% "." st)
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(modify-syntax-entry ?< "." st)
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(modify-syntax-entry ?> "." st)
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(modify-syntax-entry ?& "." st)
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(modify-syntax-entry ?: "." st)
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(modify-syntax-entry ?| "." st)
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(modify-syntax-entry ?= "." st)
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(modify-syntax-entry ?\; "." st)
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;; _ allowed in word (alternatively "_" as symbol constituent?)
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(modify-syntax-entry ?_ "w" st)
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st)
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"Syntax table for `scad-mode'.")
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(defvar scad-keywords-regexp (regexp-opt scad-keywords 'words))
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(defvar scad-modules-regexp (regexp-opt scad-modules 'words))
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(defvar scad-functions-regexp (regexp-opt scad-functions 'words))
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(defvar scad-operators-regexp (regexp-opt scad-operators))
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(defvar scad-font-lock-keywords
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`(
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("\\(module\\|function\\)[ \t]+\\(\\sw+\\)" (1 'font-lock-keyword-face nil) (2 'font-lock-function-name-face nil t))
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("<\\(\\sw+\\)>" (1 'font-lock-builtin-face nil))
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("$\\(\\sw+\\)" (1 'font-lock-builtin-face nil))
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(,scad-keywords-regexp . font-lock-keyword-face)
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(,scad-modules-regexp . font-lock-builtin-face)
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(,scad-functions-regexp . font-lock-function-name-face)
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;(,scad-operators-regexp . font-lock-operator-face) ;; This actually looks pretty ugly
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;("\\(\\<\\S +\\>\\)\\s *(" 1 font-lock-function-name-face t) ;; Seems to override other stuff (e.g. in comments and builtins)
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)
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"Keyword highlighting specification for `scad-mode'.")
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;(defvar scad-imenu-generic-expression ...)
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;(defvar scad-outline-regexp ...)
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;;;###autoload
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(define-derived-mode scad-mode fundamental-mode "SCAD"
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"A major mode for editing SCAD files."
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:syntax-table scad-mode-syntax-table
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(set (make-local-variable 'font-lock-defaults) '(scad-font-lock-keywords))
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(set (make-local-variable 'indent-line-function) 'scad-indent-line)
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;(set (make-local-variable 'imenu-generic-expression) scad-imenu-generic-expression)
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;(set (make-local-variable 'outline-regexp) scad-outline-regexp)
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)
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;;; Indentation, based on http://www.emacswiki.org/emacs/download/actionscript-mode-haas-7.0.el
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(defun scad-indent-line ()
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"Indent current line of SCAD code."
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(interactive)
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(let ((savep (> (current-column) (current-indentation)))
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(indent (condition-case nil (max (scad-calculate-indentation) 0)
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(error 0))))
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(if savep
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(save-excursion (indent-line-to indent))
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(indent-line-to indent))))
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(defun scad-calculate-indentation ()
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"Return the column to which the current line should be indented."
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(save-excursion
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(scad-maybe-skip-leading-close-delim)
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(let ((pos (point)))
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(beginning-of-line)
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(if (not (search-backward-regexp "[^\n\t\r ]" 1 0))
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0
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(progn
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(scad-maybe-skip-leading-close-delim)
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(+ (current-indentation) (* standard-indent (scad-count-scope-depth (point) pos))))))))
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(defun scad-maybe-skip-leading-close-delim ()
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(beginning-of-line)
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(forward-to-indentation 0)
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(if (looking-at "\\s)")
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(forward-char)
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(beginning-of-line)))
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(defun scad-face-at-point (pos)
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"Return face descriptor for char at point."
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(plist-get (text-properties-at pos) 'face))
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(defun scad-count-scope-depth (rstart rend)
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"Return difference between open and close scope delimeters."
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(save-excursion
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(goto-char rstart)
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(let ((open-count 0)
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(close-count 0)
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opoint)
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(while (and (< (point) rend)
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(progn (setq opoint (point))
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(re-search-forward "\\s)\\|\\s(" rend t)))
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(if (= opoint (point))
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(forward-char 1)
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(cond
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;; Don't count if in string or comment.
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((scad-face-at-point (- (point) 1)))
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((looking-back "\\s)")
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(incf close-count))
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((looking-back "\\s(")
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(incf open-count))
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)))
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(- open-count close-count))))
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(provide 'scad)
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;;; scad.el ends here
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