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comparison src/luan/modules/parsers/Css.java @ 1289:8d54bcc0b6d3

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add css style parser
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 31 Dec 2018 20:59:08 -0700
parents
children f41919741100
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1288:8432d20a2729 1289:8d54bcc0b6d3
1 package luan.modules.parsers;
2
3 import luan.LuanState;
4 import luan.LuanTable;
5 import luan.lib.parser.Parser;
6
7
8 public final class Css {
9
10 public static LuanTable style(LuanState luan,String text) {
11 return new Css(luan,text).parseStyle();
12 }
13
14 private final LuanState luan;
15 private final Parser parser;
16
17 private Css(LuanState luan,String text) {
18 this.luan = luan;
19 this.parser = new Parser(text);
20 }
21
22 private LuanTable parseStyle() {
23 LuanTable tbl = new LuanTable(luan);
24 while( matchSpace() );
25 while( !parser.endOfInput() ) {
26 int start = parser.currentIndex();
27 if( !matchPropertyChar() )
28 return null;
29 while( matchPropertyChar() );
30 String prop = parser.textFrom(start).toLowerCase();
31
32 while( matchSpace() );
33 if( !parser.match(':') )
34 return null;
35
36 start = parser.currentIndex();
37 while( !parser.endOfInput() && parser.noneOf(";") );
38 String val = parser.textFrom(start).trim();
39
40 tbl.rawPut(prop,val);
41 parser.match(';');
42 while( matchSpace() );
43 }
44 return tbl;
45 }
46
47 private boolean matchPropertyChar() {
48 return parser.inCharRange('a','z')
49 || parser.inCharRange('A','Z')
50 || parser.inCharRange('0','9')
51 || parser.anyOf("_-")
52 ;
53 }
54
55 private boolean matchSpace() {
56 return parser.anyOf(" \t\r\n");
57 }
58
59 }