[25584] | 1 | /*
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| 2 | * 09/03/2005
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| 3 | *
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| 4 | * CSSTokenMaker.java - Token maker for CSS 3 files.
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| 5 | *
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| 6 | * This library is distributed under a modified BSD license. See the included
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| 7 | * RSyntaxTextArea.License.txt file for details.
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| 8 | */
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| 9 | package org.fife.ui.rsyntaxtextarea.modes;
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| 10 |
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| 11 | import java.io.*;
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| 12 | import javax.swing.text.Segment;
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| 13 |
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| 14 | import org.fife.ui.rsyntaxtextarea.*;
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| 15 |
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| 16 |
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| 17 | /**
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| 18 | * This class splits up text into tokens representing a CSS 3 file. It's
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| 19 | * written with a few extra internal states so that it can easily be copy
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| 20 | * and pasted into HTML, PHP, and JSP TokenMakres when it is updated.<p>
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| 21 | *
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| 22 | * This implementation was created using
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| 23 | * <a href="http://www.jflex.de/">JFlex</a> 1.4.1; however, the generated file
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| 24 | * was modified for performance. Memory allocation needs to be almost
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| 25 | * completely removed to be competitive with the handwritten lexers (subclasses
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| 26 | * of <code>AbstractTokenMaker</code>, so this class has been modified so that
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| 27 | * Strings are never allocated (via yytext()), and the scanner never has to
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| 28 | * worry about refilling its buffer (needlessly copying chars around).
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| 29 | * We can achieve this because RText always scans exactly 1 line of tokens at a
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| 30 | * time, and hands the scanner this line as an array of characters (a Segment
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| 31 | * really). Since tokens contain pointers to char arrays instead of Strings
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| 32 | * holding their contents, there is no need for allocating new memory for
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| 33 | * Strings.<p>
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| 34 | *
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| 35 | * The actual algorithm generated for scanning has, of course, not been
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| 36 | * modified.<p>
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| 37 | *
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| 38 | * If you wish to regenerate this file yourself, keep in mind the following:
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| 39 | * <ul>
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| 40 | * <li>The generated CSSTokenMaker.java</code> file will contain 2
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| 41 | * definitions of both <code>zzRefill</code> and <code>yyreset</code>.
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| 42 | * You should hand-delete the second of each definition (the ones
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| 43 | * generated by the lexer), as these generated methods modify the input
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| 44 | * buffer, which we'll never have to do.</li>
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| 45 | * <li>You should also change the declaration/definition of zzBuffer to NOT
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| 46 | * be initialized. This is a needless memory allocation for us since we
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| 47 | * will be pointing the array somewhere else anyway.</li>
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| 48 | * <li>You should NOT call <code>yylex()</code> on the generated scanner
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| 49 | * directly; rather, you should use <code>getTokenList</code> as you would
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| 50 | * with any other <code>TokenMaker</code> instance.</li>
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| 51 | * </ul>
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| 52 | *
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| 53 | * @author Robert Futrell
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| 54 | * @version 0.4
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| 55 | *
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| 56 | */
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| 57 | %%
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| 58 |
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| 59 | %public
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| 60 | %class CSSTokenMaker
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| 61 | %extends AbstractJFlexTokenMaker
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| 62 | %implements TokenMaker
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| 63 | %unicode
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| 64 | %type org.fife.ui.rsyntaxtextarea.Token
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| 65 |
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| 66 |
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| 67 | %{
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| 68 |
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| 69 | /**
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| 70 | * Internal type denoting a line ending in a CSS property.
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| 71 | */
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| 72 | public static final int INTERNAL_CSS_PROPERTY = -1;
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| 73 |
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| 74 | /**
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| 75 | * Internal type denoting a line ending in a CSS property value.
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| 76 | */
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| 77 | public static final int INTERNAL_CSS_VALUE = -2;
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| 78 |
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| 79 | /**
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| 80 | * Internal type denoting line ending in a CSS double-quote string.
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| 81 | * The state to return to is embedded in the actual end token type.
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| 82 | */
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| 83 | public static final int INTERNAL_CSS_STRING = -(1<<11);
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| 84 |
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| 85 | /**
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| 86 | * Internal type denoting line ending in a CSS single-quote string.
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| 87 | * The state to return to is embedded in the actual end token type.
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| 88 | */
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| 89 | public static final int INTERNAL_CSS_CHAR = -(2<<11);
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| 90 |
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| 91 | /**
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| 92 | * Internal type denoting line ending in a CSS multi-line comment.
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| 93 | * The state to return to is embedded in the actual end token type.
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| 94 | */
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| 95 | public static final int INTERNAL_CSS_MLC = -(3<<11);
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| 96 |
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| 97 | /**
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| 98 | * The state previous CSS-related state we were in before going into a CSS
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| 99 | * string, multi-line comment, etc.
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| 100 | */
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| 101 | private int cssPrevState;
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| 102 |
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| 103 |
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| 104 | /**
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| 105 | * Constructor. This must be here because JFlex does not generate a
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| 106 | * no-parameter constructor.
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| 107 | */
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| 108 | public CSSTokenMaker() {
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| 109 | super();
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| 110 | }
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| 111 |
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| 112 |
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| 113 | /**
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| 114 | * Adds the token specified to the current linked list of tokens as an
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| 115 | * "end token;" that is, at <code>zzMarkedPos</code>.
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| 116 | *
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| 117 | * @param tokenType The token's type.
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| 118 | */
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| 119 | private void addEndToken(int tokenType) {
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| 120 | addToken(zzMarkedPos,zzMarkedPos, tokenType);
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| 121 | }
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| 122 |
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| 123 |
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| 124 | /**
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| 125 | * Adds the token specified to the current linked list of tokens.
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| 126 | *
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| 127 | * @param tokenType The token's type.
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| 128 | * @see #addToken(int, int, int)
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| 129 | */
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| 130 | private void addHyperlinkToken(int start, int end, int tokenType) {
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| 131 | int so = start + offsetShift;
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| 132 | addToken(zzBuffer, start,end, tokenType, so, true);
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| 133 | }
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| 134 |
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| 135 |
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| 136 | /**
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| 137 | * Adds the token specified to the current linked list of tokens.
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| 138 | *
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| 139 | * @param tokenType The token's type.
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| 140 | */
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| 141 | private void addToken(int tokenType) {
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| 142 | addToken(zzStartRead, zzMarkedPos-1, tokenType);
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| 143 | }
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| 144 |
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| 145 |
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| 146 | /**
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| 147 | * Adds the token specified to the current linked list of tokens.
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| 148 | *
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| 149 | * @param tokenType The token's type.
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| 150 | */
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| 151 | private void addToken(int start, int end, int tokenType) {
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| 152 | int so = start + offsetShift;
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| 153 | addToken(zzBuffer, start,end, tokenType, so);
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| 154 | }
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| 155 |
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| 156 |
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| 157 | /**
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| 158 | * Adds the token specified to the current linked list of tokens.
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| 159 | *
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| 160 | * @param array The character array.
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| 161 | * @param start The starting offset in the array.
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| 162 | * @param end The ending offset in the array.
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| 163 | * @param tokenType The token's type.
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| 164 | * @param startOffset The offset in the document at which this token
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| 165 | * occurs.
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| 166 | */
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| 167 | public void addToken(char[] array, int start, int end, int tokenType, int startOffset) {
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| 168 | super.addToken(array, start,end, tokenType, startOffset);
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| 169 | zzStartRead = zzMarkedPos;
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| 170 | }
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| 171 |
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| 172 |
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| 173 | /**
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| 174 | * Returns <code>true</code> since CSS uses curly braces.
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| 175 | *
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| 176 | * @return <code>true</code> always.
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| 177 | */
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| 178 | public boolean getCurlyBracesDenoteCodeBlocks() {
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| 179 | return true;
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| 180 | }
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| 181 |
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| 182 |
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| 183 | /**
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| 184 | * Returns the first token in the linked list of tokens generated
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| 185 | * from <code>text</code>. This method must be implemented by
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| 186 | * subclasses so they can correctly implement syntax highlighting.
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| 187 | *
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| 188 | * @param text The text from which to get tokens.
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| 189 | * @param initialTokenType The token type we should start with.
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| 190 | * @param startOffset The offset into the document at which
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| 191 | * <code>text</code> starts.
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| 192 | * @return The first <code>Token</code> in a linked list representing
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| 193 | * the syntax highlighted text.
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| 194 | */
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| 195 | public Token getTokenList(Segment text, int initialTokenType, int startOffset) {
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| 196 |
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| 197 | resetTokenList();
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| 198 | this.offsetShift = -text.offset + startOffset;
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| 199 | cssPrevState = YYINITIAL; // Shouldn't be necessary
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| 200 |
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| 201 | // Start off in the proper state.
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| 202 | int state = Token.NULL;
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| 203 | switch (initialTokenType) {
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| 204 | case Token.LITERAL_STRING_DOUBLE_QUOTE:
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| 205 | state = CSS_STRING;
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| 206 | break;
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| 207 | case Token.LITERAL_CHAR:
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| 208 | state = CSS_CHAR_LITERAL;
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| 209 | break;
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| 210 | case Token.COMMENT_MULTILINE:
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| 211 | state = CSS_C_STYLE_COMMENT;
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| 212 | break;
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| 213 | case INTERNAL_CSS_PROPERTY:
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| 214 | state = CSS_PROPERTY;
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| 215 | break;
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| 216 | case INTERNAL_CSS_VALUE:
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| 217 | state = CSS_VALUE;
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| 218 | break;
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| 219 | default:
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| 220 | if (initialTokenType<-1024) {
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| 221 | int main = -(-initialTokenType & 0xffffff00);
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| 222 | switch (main) {
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| 223 | default: // Should never happen
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| 224 | case INTERNAL_CSS_STRING:
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| 225 | state = CSS_STRING;
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| 226 | break;
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| 227 | case INTERNAL_CSS_CHAR:
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| 228 | state = CSS_CHAR_LITERAL;
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| 229 | break;
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| 230 | case INTERNAL_CSS_MLC:
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| 231 | state = CSS_C_STYLE_COMMENT;
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| 232 | break;
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| 233 | }
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| 234 | cssPrevState = -initialTokenType&0xff;
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| 235 | }
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| 236 | else {
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| 237 | state = Token.NULL;
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| 238 | }
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| 239 | }
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| 240 |
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| 241 | start = text.offset;
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| 242 | s = text;
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| 243 | try {
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| 244 | yyreset(zzReader);
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| 245 | yybegin(state);
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| 246 | return yylex();
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| 247 | } catch (IOException ioe) {
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| 248 | ioe.printStackTrace();
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| 249 | return new DefaultToken();
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| 250 | }
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| 251 |
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| 252 | }
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| 253 |
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| 254 |
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| 255 | /**
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| 256 | * Refills the input buffer.
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| 257 | *
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| 258 | * @return <code>true</code> if EOF was reached, otherwise
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| 259 | * <code>false</code>.
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| 260 | */
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| 261 | private boolean zzRefill() {
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| 262 | return zzCurrentPos>=s.offset+s.count;
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| 263 | }
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| 264 |
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| 265 |
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| 266 | /**
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| 267 | * Resets the scanner to read from a new input stream.
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| 268 | * Does not close the old reader.
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| 269 | *
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| 270 | * All internal variables are reset, the old input stream
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| 271 | * <b>cannot</b> be reused (internal buffer is discarded and lost).
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| 272 | * Lexical state is set to <tt>YY_INITIAL</tt>.
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| 273 | *
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| 274 | * @param reader the new input stream
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| 275 | */
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| 276 | public final void yyreset(java.io.Reader reader) {
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| 277 | // 's' has been updated.
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| 278 | zzBuffer = s.array;
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| 279 | /*
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| 280 | * We replaced the line below with the two below it because zzRefill
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| 281 | * no longer "refills" the buffer (since the way we do it, it's always
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| 282 | * "full" the first time through, since it points to the segment's
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| 283 | * array). So, we assign zzEndRead here.
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| 284 | */
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| 285 | //zzStartRead = zzEndRead = s.offset;
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| 286 | zzStartRead = s.offset;
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| 287 | zzEndRead = zzStartRead + s.count - 1;
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| 288 | zzCurrentPos = zzMarkedPos = zzPushbackPos = s.offset;
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| 289 | zzLexicalState = YYINITIAL;
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| 290 | zzReader = reader;
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| 291 | zzAtBOL = true;
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| 292 | zzAtEOF = false;
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| 293 | }
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| 294 |
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| 295 |
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| 296 | %}
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| 297 |
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| 298 | Digit = ([0-9])
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| 299 | Letter = ([A-Za-z])
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| 300 | LetterOrUnderscore = ({Letter}|[_])
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| 301 | LetterOrUnderscoreOrDash = ({LetterOrUnderscore}|[\-])
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| 302 |
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| 303 | CSS_SelectorPiece = (("*"|"."|{LetterOrUnderscoreOrDash})({LetterOrUnderscoreOrDash}|"."|{Digit})*)
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| 304 | CSS_PseudoClass = (":"("root"|"nth-child"|"nth-last-child"|"nth-of-type"|"nth-last-of-type"|"first-child"|"last-child"|"first-of-type"|"last-of-type"|"only-child"|"only-of-type"|"empty"|"link"|"visited"|"active"|"hover"|"focus"|"target"|"lang"|"enabled"|"disabled"|"checked"|":first-line"|":first-letter"|":before"|":after"|"not"))
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| 305 | CSS_AtKeyword = ("@"{CSS_SelectorPiece})
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| 306 | CSS_Id = ("#"{CSS_SelectorPiece})
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| 307 | CSS_Separator = ([;\(\)\[\]])
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| 308 | WhiteSpace = ([ \t]+)
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| 309 | MlcStart = ("/*")
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| 310 | MlcEnd = ("*/")
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| 311 |
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| 312 | CSS_Property = ([\*]?{LetterOrUnderscoreOrDash}({LetterOrUnderscoreOrDash}|{Digit})*)
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| 313 | CSS_ValueChar = ({LetterOrUnderscoreOrDash}|[\\/])
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| 314 | CSS_Value = ({CSS_ValueChar}*)
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| 315 | CSS_Function = ({CSS_Value}\()
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| 316 | CSS_Digits = ([\-]?{Digit}+([0-9\.]+)?(pt|pc|in|mm|cm|em|ex|px|ms|s|%)?)
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| 317 | CSS_Hex = ("#"[0-9a-fA-F]+)
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| 318 | CSS_Number = ({CSS_Digits}|{CSS_Hex})
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| 319 |
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| 320 | URLGenDelim = ([:\/\?#\[\]@])
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| 321 | URLSubDelim = ([\!\$&'\(\)\*\+,;=])
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| 322 | URLUnreserved = ({LetterOrUnderscore}|{Digit}|[\-\.\~])
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| 323 | URLCharacter = ({URLGenDelim}|{URLSubDelim}|{URLUnreserved}|[%])
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| 324 | URLCharacters = ({URLCharacter}*)
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| 325 | URLEndCharacter = ([\/\$]|{Letter}|{Digit})
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| 326 | URL = (((https?|f(tp|ile))"://"|"www.")({URLCharacters}{URLEndCharacter})?)
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| 327 |
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| 328 |
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| 329 | %state CSS_PROPERTY
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| 330 | %state CSS_VALUE
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| 331 | %state CSS_STRING
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| 332 | %state CSS_CHAR_LITERAL
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| 333 | %state CSS_C_STYLE_COMMENT
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| 334 |
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| 335 |
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| 336 | %%
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| 337 |
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| 338 | <YYINITIAL> {
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| 339 | {CSS_SelectorPiece} { addToken(Token.DATA_TYPE); }
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| 340 | {CSS_PseudoClass} { addToken(Token.RESERVED_WORD); }
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| 341 | ":" { /* Unknown pseudo class */ addToken(Token.DATA_TYPE); }
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| 342 | {CSS_AtKeyword} { addToken(Token.REGEX); }
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| 343 | {CSS_Id} { addToken(Token.VARIABLE); }
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| 344 | "{" { addToken(Token.SEPARATOR); yybegin(CSS_PROPERTY); }
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| 345 | [,] { addToken(Token.IDENTIFIER); }
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| 346 | \" { start = zzMarkedPos-1; cssPrevState = zzLexicalState; yybegin(CSS_STRING); }
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| 347 | \' { start = zzMarkedPos-1; cssPrevState = zzLexicalState; yybegin(CSS_CHAR_LITERAL); }
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| 348 | [+>~\^$\|=] { addToken(Token.OPERATOR); }
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| 349 | {CSS_Separator} { addToken(Token.SEPARATOR); }
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| 350 | {WhiteSpace} { addToken(Token.WHITESPACE); }
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| 351 | {MlcStart} { start = zzMarkedPos-2; cssPrevState = zzLexicalState; yybegin(CSS_C_STYLE_COMMENT); }
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| 352 | . { /*System.out.println("yyinitial: " + yytext());*/ addToken(Token.IDENTIFIER); }
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| 353 | "\n" |
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| 354 | <<EOF>> { addNullToken(); return firstToken; }
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| 355 | }
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| 356 |
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| 357 | <CSS_PROPERTY> {
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| 358 | {CSS_Property} { addToken(Token.RESERVED_WORD); }
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| 359 | "}" { addToken(Token.SEPARATOR); yybegin(YYINITIAL); }
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| 360 | ":" { addToken(Token.OPERATOR); yybegin(CSS_VALUE); }
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| 361 | {WhiteSpace} { addToken(Token.WHITESPACE); }
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| 362 | {MlcStart} { start = zzMarkedPos-2; cssPrevState = zzLexicalState; yybegin(CSS_C_STYLE_COMMENT); }
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| 363 | . { /*System.out.println("css_property: " + yytext());*/ addToken(Token.IDENTIFIER); }
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| 364 | "\n" |
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| 365 | <<EOF>> { addEndToken(INTERNAL_CSS_PROPERTY); return firstToken; }
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| 366 | }
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| 367 |
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| 368 | <CSS_VALUE> {
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| 369 | {CSS_Value} { addToken(Token.IDENTIFIER); }
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| 370 | "!important" { addToken(Token.ANNOTATION); }
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| 371 | {CSS_Function} { int temp = zzMarkedPos - 2;
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| 372 | addToken(zzStartRead, temp, Token.FUNCTION);
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| 373 | addToken(zzMarkedPos-1, zzMarkedPos-1, Token.SEPARATOR);
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| 374 | zzStartRead = zzCurrentPos = zzMarkedPos;
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| 375 | }
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| 376 | {CSS_Number} { addToken(Token.LITERAL_NUMBER_DECIMAL_INT); }
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| 377 | \" { start = zzMarkedPos-1; cssPrevState = zzLexicalState; yybegin(CSS_STRING); }
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| 378 | \' { start = zzMarkedPos-1; cssPrevState = zzLexicalState; yybegin(CSS_CHAR_LITERAL); }
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| 379 | ")" { /* End of a function */ addToken(Token.SEPARATOR); }
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| 380 | [;] { addToken(Token.OPERATOR); yybegin(CSS_PROPERTY); }
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| 381 | [,\.] { addToken(Token.IDENTIFIER); }
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| 382 | "}" { addToken(Token.SEPARATOR); yybegin(YYINITIAL); }
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| 383 | {WhiteSpace} { addToken(Token.WHITESPACE); }
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| 384 | {MlcStart} { start = zzMarkedPos-2; cssPrevState = zzLexicalState; yybegin(CSS_C_STYLE_COMMENT); }
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| 385 | . { /*System.out.println("css_value: " + yytext());*/ addToken(Token.IDENTIFIER); }
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| 386 | "\n" |
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| 387 | <<EOF>> { addEndToken(INTERNAL_CSS_VALUE); return firstToken; }
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| 388 | }
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| 389 |
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| 390 | <CSS_STRING> {
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| 391 | [^\n\\\"]+ {}
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| 392 | \\.? { /* Skip escaped chars. */ }
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| 393 | \" { addToken(start,zzStartRead, Token.LITERAL_STRING_DOUBLE_QUOTE); yybegin(cssPrevState); }
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| 394 | \n |
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| 395 | <<EOF>> { addToken(start,zzStartRead-1, Token.LITERAL_STRING_DOUBLE_QUOTE); addEndToken(INTERNAL_CSS_STRING - cssPrevState); return firstToken; }
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| 396 | }
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| 397 |
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| 398 | <CSS_CHAR_LITERAL> {
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| 399 | [^\n\\\']+ {}
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| 400 | \\.? { /* Skip escaped chars. */ }
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| 401 | \' { addToken(start,zzStartRead, Token.LITERAL_CHAR); yybegin(cssPrevState); }
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| 402 | \n |
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| 403 | <<EOF>> { addToken(start,zzStartRead-1, Token.LITERAL_CHAR); addEndToken(INTERNAL_CSS_CHAR - cssPrevState); return firstToken; }
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| 404 | }
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| 405 |
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| 406 | <CSS_C_STYLE_COMMENT> {
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| 407 | [^hwf\n\*]+ {}
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| 408 | {URL} { int temp=zzStartRead; addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); addHyperlinkToken(temp,zzMarkedPos-1, Token.COMMENT_MULTILINE); start = zzMarkedPos; }
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| 409 | [hwf] {}
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| 410 | {MlcEnd} { addToken(start,zzStartRead+1, Token.COMMENT_MULTILINE); yybegin(cssPrevState); }
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| 411 | \* {}
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| 412 | \n |
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| 413 | <<EOF>> { addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); addEndToken(INTERNAL_CSS_MLC - cssPrevState); return firstToken; }
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| 414 | }
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