blob: 4326a4c53e3842c22fbb6e1dc0896dfbcf39ed97 (
plain)
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
|
;;; guile-syntax-highlight -- General-purpose syntax highlighter
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;;
;;; Guile-syntax-highlight is free software; you can redistribute it
;;; and/or modify it under the terms of the GNU Lesser General Public
;;; License as published by the Free Software Foundation; either
;;; version 3 of the License, or (at your option) any later version.
;;;
;;; Guile-syntax-highlight 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 Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with guile-syntax-highlight. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; General-purpose syntax highlighting framework.
;;
;;; Code:
(define-module (syntax-highlight)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (syntax-highlight lexers)
#:export (highlight
highlights->sxml))
(define (object->string obj)
(cond
((input-port? obj)
(read-string obj))
((string? obj)
obj)
(else
(error "not an input port or string: "
obj))))
(define object->cursor
(compose string->cursor object->string))
(define* (highlight lexer #:optional (string-or-port (current-input-port)))
"Apply LEXER to STRING-OR-PORT, a string or an open input port. If
STRING-OR-PORT is not specified, characters are read from the current
input port."
(let-values (((result remainder)
(lexer empty-tokens (object->cursor string-or-port))))
(and result (tokens->list result))))
(define (highlights->sxml highlights)
"Convert HIGHLIGHTS, a list of syntax highlighting expressions, into
a list of SXML 'span' nodes. Each 'span' node has a 'class' attribute
corresponding to the highlighting tag name."
(define (tag->class tag)
(string-append "syntax-" (symbol->string tag)))
(map (match-lambda
((? string? str) str)
((tag text)
`(span (@ (class ,(tag->class tag))) ,text)))
highlights))
|
