1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
;;; scad.el --- SCAD mode derived mode
;; Author: Len Trigg
;; Maintainer: Len Trigg <lenbok@gmail.com>
;; Created: March 2010
;; Modified: March 2010
;; Version: $Revision: 88 $
;; 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 separate mode to implement the SCAD constructs and
;; font-locking.
;;
;; To use, insert the following into your emacs startup:
;;
;; (autoload 'scad-mode "scad" "Major mode for editing SCAD code." t)
;; (add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
;;; To Do:
;; - Support for background/debug/root/disable modifiers
;; - Font lock of non-built-in function calls
;;; Autoload mode trigger
(add-to-list 'auto-mode-alist '("\\.scad$" . scad-mode))
(defcustom scad-keywords
'("return" "true" "false")
"SCAD keywords."
:type 'list
:group 'scad-font-lock)
(defcustom scad-functions
'("cos" "acos" "sin" "asin" "tan" "atan"
"pow" "log" "ln"
"abs" "min" "max" "sqrt" "round" "ceil" "floor" "lookup"
"str"
"dxf_dim" "dxf_cross"
)
"SCAD functions."
:type 'list
:group 'scad-font-lock)
(defcustom scad-modules
'("for" "if" "assign" "intersection_for"
"echo"
"cube" "sphere" "cylinder" "polyhedron"
"scale" "rotate" "translate" "mirror" "multmatrix" "color"
"union" "difference" "intersection" "render" "surface"
"square" "circle" "polygon" "dxf_linear_extrude" "linear_extrude" "dxf_rotate_extrude" "rotate_extrude"
"import_stl" "import_off" "import_dxf" "group"
"projection" "minkowski" "glide" "subdiv" "child"
)
"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 [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)
)
;;; 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))))
(provide 'scad)
;;; scad.el ends here
|
