gvsig-scripting / org.gvsig.scripting / trunk / org.gvsig.scripting / org.gvsig.scripting.swing / org.gvsig.scripting.swing.impl / src / main / java / org / gvsig / scripting / swing / impl / syntaxhighlight / styles / JavaStyledDocument.java @ 1440
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| 1 | 165 | jobacas | package org.gvsig.scripting.swing.impl.syntaxhighlight.styles; |
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| 2 | |||
| 3 | import java.awt.Color; |
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| 4 | import java.util.HashSet; |
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| 5 | 212 | cordinyana | import java.util.Set; |
| 6 | 165 | jobacas | |
| 7 | import javax.swing.text.AttributeSet; |
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| 8 | import javax.swing.text.BadLocationException; |
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| 9 | import javax.swing.text.DefaultEditorKit; |
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| 10 | import javax.swing.text.DefaultStyledDocument; |
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| 11 | import javax.swing.text.Element; |
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| 12 | import javax.swing.text.MutableAttributeSet; |
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| 13 | import javax.swing.text.SimpleAttributeSet; |
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| 14 | import javax.swing.text.StyleConstants; |
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| 15 | |||
| 16 | |||
| 17 | public class JavaStyledDocument extends DefaultStyledDocument { |
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| 18 | /**
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| 19 | *
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| 20 | */
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| 21 | private static final long serialVersionUID = 2859530660266127826L; |
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| 22 | |||
| 23 | 212 | cordinyana | private final DefaultStyledDocument doc; |
| 24 | private final Element rootElement; |
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| 25 | 165 | jobacas | |
| 26 | private boolean multiLineComment; |
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| 27 | 212 | cordinyana | private final MutableAttributeSet normal; |
| 28 | private final MutableAttributeSet keyword; |
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| 29 | private final MutableAttributeSet comment; |
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| 30 | private final MutableAttributeSet quote; |
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| 31 | 165 | jobacas | |
| 32 | 212 | cordinyana | private final Set<String> keywords; |
| 33 | 165 | jobacas | |
| 34 | public JavaStyledDocument()
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| 35 | {
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| 36 | doc = this;
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| 37 | rootElement = doc.getDefaultRootElement(); |
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| 38 | putProperty( DefaultEditorKit.EndOfLineStringProperty, "\n" ); |
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| 39 | |||
| 40 | normal = new SimpleAttributeSet(); |
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| 41 | StyleConstants.setForeground(normal, Color.black); |
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| 42 | |||
| 43 | comment = new SimpleAttributeSet(); |
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| 44 | StyleConstants.setForeground(comment, Color.gray); |
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| 45 | StyleConstants.setItalic(comment, true); |
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| 46 | |||
| 47 | keyword = new SimpleAttributeSet(); |
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| 48 | StyleConstants.setForeground(keyword, Color.blue); |
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| 49 | |||
| 50 | quote = new SimpleAttributeSet(); |
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| 51 | StyleConstants.setForeground(quote, Color.red); |
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| 52 | |||
| 53 | 212 | cordinyana | keywords = new HashSet<String>(); |
| 54 | 165 | jobacas | keywords.add( "abstract" );
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| 55 | keywords.add( "boolean" );
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| 56 | keywords.add( "break" );
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| 57 | keywords.add( "byte" );
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| 58 | keywords.add( "byvalue" );
|
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| 59 | keywords.add( "case" );
|
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| 60 | keywords.add( "cast" );
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| 61 | keywords.add( "catch" );
|
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| 62 | keywords.add( "char" );
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| 63 | keywords.add( "class" );
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| 64 | keywords.add( "const" );
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| 65 | keywords.add( "continue" );
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| 66 | keywords.add( "default" );
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| 67 | keywords.add( "do" );
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| 68 | keywords.add( "double" );
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| 69 | keywords.add( "else" );
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| 70 | keywords.add( "extends" );
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| 71 | keywords.add( "false" );
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| 72 | keywords.add( "final" );
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| 73 | keywords.add( "finally" );
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| 74 | keywords.add( "float" );
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| 75 | keywords.add( "for" );
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| 76 | keywords.add( "future" );
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| 77 | keywords.add( "generic" );
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| 78 | keywords.add( "goto" );
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| 79 | keywords.add( "if" );
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| 80 | keywords.add( "implements" );
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| 81 | keywords.add( "import" );
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| 82 | keywords.add( "inner" );
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| 83 | keywords.add( "instanceof" );
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| 84 | keywords.add( "int" );
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| 85 | keywords.add( "interface" );
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| 86 | keywords.add( "long" );
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| 87 | keywords.add( "native" );
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| 88 | keywords.add( "new" );
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| 89 | keywords.add( "null" );
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| 90 | keywords.add( "operator" );
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| 91 | keywords.add( "outer" );
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| 92 | keywords.add( "package" );
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| 93 | keywords.add( "private" );
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| 94 | keywords.add( "protected" );
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| 95 | keywords.add( "public" );
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| 96 | keywords.add( "rest" );
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| 97 | keywords.add( "return" );
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| 98 | keywords.add( "short" );
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| 99 | keywords.add( "static" );
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| 100 | keywords.add( "super" );
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| 101 | keywords.add( "switch" );
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| 102 | keywords.add( "synchronized" );
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| 103 | keywords.add( "this" );
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| 104 | keywords.add( "throw" );
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| 105 | keywords.add( "throws" );
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| 106 | keywords.add( "transient" );
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| 107 | keywords.add( "true" );
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| 108 | keywords.add( "try" );
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| 109 | keywords.add( "var" );
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| 110 | keywords.add( "void" );
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| 111 | keywords.add( "volatile" );
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| 112 | keywords.add( "while" );
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| 113 | } |
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| 114 | |||
| 115 | /*
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| 116 | * Override to apply syntax highlighting after the document has been updated
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| 117 | */
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| 118 | 212 | cordinyana | @Override
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| 119 | public void insertString(int offset, String str, AttributeSet a) throws BadLocationException |
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| 120 | 165 | jobacas | {
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| 121 | if (str.equals("{")) |
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| 122 | str = addMatchingBrace(offset); |
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| 123 | |||
| 124 | super.insertString(offset, str, a);
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| 125 | processChangedLines(offset, str.length()); |
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| 126 | } |
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| 127 | |||
| 128 | /*
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| 129 | * Override to apply syntax highlighting after the document has been updated
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| 130 | */
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| 131 | 212 | cordinyana | @Override
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| 132 | public void remove(int offset, int length) throws BadLocationException |
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| 133 | 165 | jobacas | {
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| 134 | super.remove(offset, length);
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| 135 | processChangedLines(offset, 0);
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| 136 | } |
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| 137 | |||
| 138 | /*
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| 139 | * Determine how many lines have been changed,
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| 140 | * then apply highlighting to each line
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| 141 | */
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| 142 | public void processChangedLines(int offset, int length) |
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| 143 | throws BadLocationException |
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| 144 | {
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| 145 | String content = doc.getText(0, doc.getLength()); |
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| 146 | |||
| 147 | // The lines affected by the latest document update
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| 148 | |||
| 149 | int startLine = rootElement.getElementIndex( offset );
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| 150 | int endLine = rootElement.getElementIndex( offset + length );
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| 151 | |||
| 152 | // Make sure all comment lines prior to the start line are commented
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| 153 | // and determine if the start line is still in a multi line comment
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| 154 | |||
| 155 | setMultiLineComment( commentLinesBefore( content, startLine ) ); |
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| 156 | |||
| 157 | // Do the actual highlighting
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| 158 | |||
| 159 | for (int i = startLine; i <= endLine; i++) |
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| 160 | {
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| 161 | applyHighlighting(content, i); |
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| 162 | } |
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| 163 | |||
| 164 | // Resolve highlighting to the next end multi line delimiter
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| 165 | |||
| 166 | if (isMultiLineComment())
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| 167 | commentLinesAfter(content, endLine); |
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| 168 | else
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| 169 | highlightLinesAfter(content, endLine); |
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| 170 | } |
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| 171 | |||
| 172 | /*
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| 173 | * Highlight lines when a multi line comment is still 'open'
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| 174 | * (ie. matching end delimiter has not yet been encountered)
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| 175 | */
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| 176 | private boolean commentLinesBefore(String content, int line) |
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| 177 | {
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| 178 | int offset = rootElement.getElement( line ).getStartOffset();
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| 179 | |||
| 180 | // Start of comment not found, nothing to do
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| 181 | |||
| 182 | int startDelimiter = lastIndexOf( content, getStartDelimiter(), offset - 2 ); |
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| 183 | |||
| 184 | if (startDelimiter < 0) |
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| 185 | return false; |
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| 186 | |||
| 187 | // Matching start/end of comment found, nothing to do
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| 188 | |||
| 189 | int endDelimiter = indexOf( content, getEndDelimiter(), startDelimiter );
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| 190 | |||
| 191 | if (endDelimiter < offset & endDelimiter != -1) |
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| 192 | return false; |
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| 193 | |||
| 194 | // End of comment not found, highlight the lines
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| 195 | |||
| 196 | doc.setCharacterAttributes(startDelimiter, offset - startDelimiter + 1, comment, false); |
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| 197 | return true; |
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| 198 | } |
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| 199 | |||
| 200 | /*
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| 201 | * Highlight comment lines to matching end delimiter
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| 202 | */
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| 203 | private void commentLinesAfter(String content, int line) |
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| 204 | {
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| 205 | int offset = rootElement.getElement( line ).getEndOffset();
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| 206 | |||
| 207 | // End of comment not found, nothing to do
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| 208 | |||
| 209 | int endDelimiter = indexOf( content, getEndDelimiter(), offset );
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| 210 | |||
| 211 | if (endDelimiter < 0) |
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| 212 | return;
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| 213 | |||
| 214 | // Matching start/end of comment found, comment the lines
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| 215 | |||
| 216 | int startDelimiter = lastIndexOf( content, getStartDelimiter(), endDelimiter );
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| 217 | |||
| 218 | if (startDelimiter < 0 || startDelimiter <= offset) |
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| 219 | {
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| 220 | doc.setCharacterAttributes(offset, endDelimiter - offset + 1, comment, false); |
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| 221 | } |
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| 222 | } |
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| 223 | |||
| 224 | /*
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| 225 | * Highlight lines to start or end delimiter
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| 226 | */
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| 227 | private void highlightLinesAfter(String content, int line) |
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| 228 | throws BadLocationException |
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| 229 | {
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| 230 | int offset = rootElement.getElement( line ).getEndOffset();
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| 231 | |||
| 232 | // Start/End delimiter not found, nothing to do
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| 233 | |||
| 234 | int startDelimiter = indexOf( content, getStartDelimiter(), offset );
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| 235 | int endDelimiter = indexOf( content, getEndDelimiter(), offset );
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| 236 | |||
| 237 | if (startDelimiter < 0) |
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| 238 | startDelimiter = content.length(); |
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| 239 | |||
| 240 | if (endDelimiter < 0) |
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| 241 | endDelimiter = content.length(); |
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| 242 | |||
| 243 | int delimiter = Math.min(startDelimiter, endDelimiter); |
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| 244 | |||
| 245 | if (delimiter < offset)
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| 246 | return;
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| 247 | |||
| 248 | // Start/End delimiter found, reapply highlighting
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| 249 | |||
| 250 | int endLine = rootElement.getElementIndex( delimiter );
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| 251 | |||
| 252 | for (int i = line + 1; i < endLine; i++) |
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| 253 | {
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| 254 | Element branch = rootElement.getElement( i );
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| 255 | Element leaf = doc.getCharacterElement( branch.getStartOffset() );
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| 256 | AttributeSet as = leaf.getAttributes();
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| 257 | |||
| 258 | if ( as.isEqual(comment) )
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| 259 | applyHighlighting(content, i); |
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| 260 | } |
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| 261 | } |
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| 262 | |||
| 263 | /*
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| 264 | * Parse the line to determine the appropriate highlighting
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| 265 | */
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| 266 | private void applyHighlighting(String content, int line) |
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| 267 | throws BadLocationException |
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| 268 | {
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| 269 | int startOffset = rootElement.getElement( line ).getStartOffset();
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| 270 | int endOffset = rootElement.getElement( line ).getEndOffset() - 1; |
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| 271 | |||
| 272 | int lineLength = endOffset - startOffset;
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| 273 | int contentLength = content.length();
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| 274 | |||
| 275 | if (endOffset >= contentLength)
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| 276 | endOffset = contentLength - 1;
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| 277 | |||
| 278 | // check for multi line comments
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| 279 | // (always set the comment attribute for the entire line)
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| 280 | |||
| 281 | if (endingMultiLineComment(content, startOffset, endOffset)
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| 282 | || isMultiLineComment() |
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| 283 | || startingMultiLineComment(content, startOffset, endOffset) ) |
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| 284 | {
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| 285 | doc.setCharacterAttributes(startOffset, endOffset - startOffset + 1, comment, false); |
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| 286 | return;
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| 287 | } |
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| 288 | |||
| 289 | // set normal attributes for the line
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| 290 | |||
| 291 | doc.setCharacterAttributes(startOffset, lineLength, normal, true);
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| 292 | |||
| 293 | // check for single line comment
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| 294 | |||
| 295 | int index = content.indexOf(getSingleLineDelimiter(), startOffset);
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| 296 | |||
| 297 | if ( (index > -1) && (index < endOffset) ) |
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| 298 | {
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| 299 | doc.setCharacterAttributes(index, endOffset - index + 1, comment, false); |
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| 300 | endOffset = index - 1;
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| 301 | } |
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| 302 | |||
| 303 | // check for tokens
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| 304 | |||
| 305 | checkForTokens(content, startOffset, endOffset); |
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| 306 | } |
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| 307 | |||
| 308 | /*
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| 309 | * Does this line contain the start delimiter
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| 310 | */
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| 311 | private boolean startingMultiLineComment(String content, int startOffset, int endOffset) |
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| 312 | throws BadLocationException |
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| 313 | {
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| 314 | int index = indexOf( content, getStartDelimiter(), startOffset );
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| 315 | |||
| 316 | if ( (index < 0) || (index > endOffset) ) |
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| 317 | return false; |
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| 318 | else
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| 319 | {
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| 320 | setMultiLineComment( true );
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| 321 | return true; |
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| 322 | } |
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| 323 | } |
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| 324 | |||
| 325 | /*
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| 326 | * Does this line contain the end delimiter
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| 327 | */
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| 328 | private boolean endingMultiLineComment(String content, int startOffset, int endOffset) |
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| 329 | throws BadLocationException |
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| 330 | {
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| 331 | int index = indexOf( content, getEndDelimiter(), startOffset );
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| 332 | |||
| 333 | if ( (index < 0) || (index > endOffset) ) |
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| 334 | return false; |
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| 335 | else
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| 336 | {
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| 337 | setMultiLineComment( false );
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| 338 | return true; |
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| 339 | } |
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| 340 | } |
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| 341 | |||
| 342 | /*
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| 343 | * We have found a start delimiter
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| 344 | * and are still searching for the end delimiter
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| 345 | */
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| 346 | private boolean isMultiLineComment() |
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| 347 | {
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| 348 | return multiLineComment;
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| 349 | } |
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| 350 | |||
| 351 | private void setMultiLineComment(boolean value) |
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| 352 | {
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| 353 | multiLineComment = value; |
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| 354 | } |
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| 355 | |||
| 356 | /*
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| 357 | * Parse the line for tokens to highlight
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| 358 | */
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| 359 | private void checkForTokens(String content, int startOffset, int endOffset) |
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| 360 | {
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| 361 | while (startOffset <= endOffset)
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| 362 | {
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| 363 | // skip the delimiters to find the start of a new token
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| 364 | |||
| 365 | while ( isDelimiter( content.substring(startOffset, startOffset + 1) ) ) |
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| 366 | {
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| 367 | if (startOffset < endOffset)
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| 368 | startOffset++; |
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| 369 | else
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| 370 | return;
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| 371 | } |
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| 372 | |||
| 373 | // Extract and process the entire token
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| 374 | |||
| 375 | if ( isQuoteDelimiter( content.substring(startOffset, startOffset + 1) ) ) |
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| 376 | startOffset = getQuoteToken(content, startOffset, endOffset); |
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| 377 | else
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| 378 | startOffset = getOtherToken(content, startOffset, endOffset); |
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| 379 | } |
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| 380 | } |
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| 381 | |||
| 382 | /*
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| 383 | *
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| 384 | */
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| 385 | private int getQuoteToken(String content, int startOffset, int endOffset) |
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| 386 | {
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| 387 | String quoteDelimiter = content.substring(startOffset, startOffset + 1); |
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| 388 | String escapeString = getEscapeString(quoteDelimiter);
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| 389 | |||
| 390 | int index;
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| 391 | int endOfQuote = startOffset;
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| 392 | |||
| 393 | // skip over the escape quotes in this quote
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| 394 | |||
| 395 | index = content.indexOf(escapeString, endOfQuote + 1);
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| 396 | |||
| 397 | while ( (index > -1) && (index < endOffset) ) |
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| 398 | {
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| 399 | endOfQuote = index + 1;
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| 400 | index = content.indexOf(escapeString, endOfQuote); |
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| 401 | } |
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| 402 | |||
| 403 | // now find the matching delimiter
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| 404 | |||
| 405 | index = content.indexOf(quoteDelimiter, endOfQuote + 1);
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| 406 | |||
| 407 | if ( (index < 0) || (index > endOffset) ) |
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| 408 | endOfQuote = endOffset; |
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| 409 | else
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| 410 | endOfQuote = index; |
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| 411 | |||
| 412 | doc.setCharacterAttributes(startOffset, endOfQuote - startOffset + 1, quote, false); |
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| 413 | |||
| 414 | return endOfQuote + 1; |
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| 415 | } |
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| 416 | |||
| 417 | /*
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| 418 | *
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| 419 | */
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| 420 | private int getOtherToken(String content, int startOffset, int endOffset) |
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| 421 | {
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| 422 | int endOfToken = startOffset + 1; |
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| 423 | |||
| 424 | while ( endOfToken <= endOffset )
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| 425 | {
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| 426 | if ( isDelimiter( content.substring(endOfToken, endOfToken + 1) ) ) |
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| 427 | break;
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| 428 | |||
| 429 | endOfToken++; |
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| 430 | } |
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| 431 | |||
| 432 | String token = content.substring(startOffset, endOfToken);
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| 433 | |||
| 434 | if ( isKeyword( token ) )
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| 435 | {
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| 436 | doc.setCharacterAttributes(startOffset, endOfToken - startOffset, keyword, false);
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| 437 | } |
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| 438 | |||
| 439 | return endOfToken + 1; |
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| 440 | } |
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| 441 | |||
| 442 | /*
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| 443 | * Assume the needle will the found at the start/end of the line
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| 444 | */
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| 445 | private int indexOf(String content, String needle, int offset) |
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| 446 | {
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| 447 | int index;
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| 448 | |||
| 449 | while ( (index = content.indexOf(needle, offset)) != -1 ) |
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| 450 | {
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| 451 | String text = getLine( content, index ).trim();
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| 452 | |||
| 453 | if (text.startsWith(needle) || text.endsWith(needle))
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| 454 | break;
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| 455 | else
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| 456 | offset = index + 1;
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| 457 | } |
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| 458 | |||
| 459 | return index;
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| 460 | } |
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| 461 | |||
| 462 | /*
|
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| 463 | * Assume the needle will the found at the start/end of the line
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| 464 | */
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| 465 | private int lastIndexOf(String content, String needle, int offset) |
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| 466 | {
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| 467 | int index;
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| 468 | |||
| 469 | while ( (index = content.lastIndexOf(needle, offset)) != -1 ) |
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| 470 | {
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| 471 | String text = getLine( content, index ).trim();
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| 472 | |||
| 473 | if (text.startsWith(needle) || text.endsWith(needle))
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| 474 | break;
|
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| 475 | else
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| 476 | offset = index - 1;
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| 477 | } |
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| 478 | |||
| 479 | return index;
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| 480 | } |
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| 481 | |||
| 482 | private String getLine(String content, int offset) |
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| 483 | {
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| 484 | int line = rootElement.getElementIndex( offset );
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| 485 | Element lineElement = rootElement.getElement( line );
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| 486 | int start = lineElement.getStartOffset();
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| 487 | int end = lineElement.getEndOffset();
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| 488 | return content.substring(start, end - 1); |
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| 489 | } |
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| 490 | |||
| 491 | /*
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| 492 | * Override for other languages
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| 493 | */
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| 494 | protected boolean isDelimiter(String character) |
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| 495 | {
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| 496 | String operands = ";:{}()[]+-/%<=>!&|^~*"; |
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| 497 | |||
| 498 | if (Character.isWhitespace( character.charAt(0) ) || |
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| 499 | operands.indexOf(character) != -1 )
|
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| 500 | return true; |
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| 501 | else
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| 502 | return false; |
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| 503 | } |
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| 504 | |||
| 505 | /*
|
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| 506 | * Override for other languages
|
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| 507 | */
|
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| 508 | protected boolean isQuoteDelimiter(String character) |
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| 509 | {
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| 510 | String quoteDelimiters = "\"'"; |
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| 511 | |||
| 512 | if (quoteDelimiters.indexOf(character) < 0) |
||
| 513 | return false; |
||
| 514 | else
|
||
| 515 | return true; |
||
| 516 | } |
||
| 517 | |||
| 518 | /*
|
||
| 519 | * Override for other languages
|
||
| 520 | */
|
||
| 521 | protected boolean isKeyword(String token) |
||
| 522 | {
|
||
| 523 | return keywords.contains( token );
|
||
| 524 | } |
||
| 525 | |||
| 526 | /*
|
||
| 527 | * Override for other languages
|
||
| 528 | */
|
||
| 529 | protected String getStartDelimiter() |
||
| 530 | {
|
||
| 531 | return "/*"; |
||
| 532 | } |
||
| 533 | |||
| 534 | /*
|
||
| 535 | * Override for other languages
|
||
| 536 | */
|
||
| 537 | protected String getEndDelimiter() |
||
| 538 | {
|
||
| 539 | return "*/"; |
||
| 540 | } |
||
| 541 | |||
| 542 | /*
|
||
| 543 | * Override for other languages
|
||
| 544 | */
|
||
| 545 | protected String getSingleLineDelimiter() |
||
| 546 | {
|
||
| 547 | return "//"; |
||
| 548 | } |
||
| 549 | |||
| 550 | /*
|
||
| 551 | * Override for other languages
|
||
| 552 | */
|
||
| 553 | protected String getEscapeString(String quoteDelimiter) |
||
| 554 | {
|
||
| 555 | return "\\" + quoteDelimiter; |
||
| 556 | } |
||
| 557 | |||
| 558 | /*
|
||
| 559 | *
|
||
| 560 | */
|
||
| 561 | protected String addMatchingBrace(int offset) throws BadLocationException |
||
| 562 | {
|
||
| 563 | StringBuffer whiteSpace = new StringBuffer(); |
||
| 564 | int line = rootElement.getElementIndex( offset );
|
||
| 565 | int i = rootElement.getElement(line).getStartOffset();
|
||
| 566 | |||
| 567 | while (true) |
||
| 568 | {
|
||
| 569 | String temp = doc.getText(i, 1); |
||
| 570 | |||
| 571 | if (temp.equals(" ") || temp.equals("\t")) |
||
| 572 | {
|
||
| 573 | whiteSpace.append(temp); |
||
| 574 | i++; |
||
| 575 | } |
||
| 576 | else
|
||
| 577 | break;
|
||
| 578 | } |
||
| 579 | |||
| 580 | return "{\n" + whiteSpace.toString() + "\t\n" + whiteSpace.toString() + "}"; |
||
| 581 | } |
||
| 582 | |||
| 583 | } |