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1 package luan.modules.parsers;
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2
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3 import luan.LuanState;
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4 import luan.LuanTable;
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1330
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5 import luan.LuanException;
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6 import luan.lib.parser.Parser;
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7
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8
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9 public final class Css {
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10
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11 public static LuanTable style(LuanState luan,String text) {
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1330
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12 try {
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13 return new Css(luan,text).parseStyle();
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14 } catch(LuanException e) {
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15 throw new RuntimeException(e);
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16 }
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17 }
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18
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19 private final LuanState luan;
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20 private final Parser parser;
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21
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22 private Css(LuanState luan,String text) {
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23 this.luan = luan;
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24 this.parser = new Parser(text);
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25 }
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26
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27 private LuanTable parseStyle() throws LuanException {
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28 LuanTable tbl = new LuanTable(luan);
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29 while( matchSpace() );
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30 while( !parser.endOfInput() ) {
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31 int start = parser.currentIndex();
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32 if( !matchPropertyChar() )
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33 return null;
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34 while( matchPropertyChar() );
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35 String prop = parser.textFrom(start).toLowerCase();
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36
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37 while( matchSpace() );
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38 if( !parser.match(':') )
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39 return null;
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40
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41 start = parser.currentIndex();
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42 while( !parser.endOfInput() && parser.noneOf(";") );
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43 String val = parser.textFrom(start).trim();
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44
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45 tbl.put(prop,val);
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46 parser.match(';');
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47 while( matchSpace() );
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48 }
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49 return tbl;
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50 }
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51
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52 private boolean matchPropertyChar() {
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53 return parser.inCharRange('a','z')
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54 || parser.inCharRange('A','Z')
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55 || parser.inCharRange('0','9')
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56 || parser.anyOf("_-")
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57 ;
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58 }
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59
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60 private boolean matchSpace() {
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61 return parser.anyOf(" \t\r\n");
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62 }
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63
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64 }
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