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Added source for ByteEdit
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/*
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* 04/23/2009
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*
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* RSyntaxTextAreaHighlighter.java - Highlighter for RSyntaxTextAreas.
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*
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* This library is distributed under a modified BSD license. See the included
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* RSyntaxTextArea.License.txt file for details.
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*/
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package org.fife.ui.rsyntaxtextarea;
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import java.awt.Color;
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import java.awt.Graphics;
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import java.awt.Shape;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import javax.swing.plaf.TextUI;
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import javax.swing.text.BadLocationException;
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import javax.swing.text.Document;
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import javax.swing.text.Element;
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import javax.swing.text.JTextComponent;
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import javax.swing.text.View;
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import org.fife.ui.rsyntaxtextarea.parser.Parser;
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import org.fife.ui.rsyntaxtextarea.parser.ParserNotice;
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import org.fife.ui.rtextarea.RTextAreaHighlighter;
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import org.fife.ui.rtextarea.SmartHighlightPainter;
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/**
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* The highlighter implementation used by {@link RSyntaxTextArea}s. It knows to
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* always paint "marked occurrences" highlights below selection highlights,
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* and squiggle underline highlights above all other highlights.<p>
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*
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* Most of this code is copied from javax.swing.text.DefaultHighlighter;
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* unfortunately, we cannot re-use much of it since it is package private.
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*
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* @author Robert Futrell
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* @version 1.0
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*/
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public class RSyntaxTextAreaHighlighter extends RTextAreaHighlighter {
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/**
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* Marked occurrences in the document (to be painted separately from
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* other highlights).
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*/
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private List<SyntaxLayeredHighlightInfoImpl> markedOccurrences;
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/**
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* Highlights from document parsers. These should be painted "on top of"
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* all other highlights to ensure they are always above the selection.
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*/
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private List<SyntaxLayeredHighlightInfoImpl> parserHighlights;
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/**
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* The default color used for parser notices when none is specified.
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*/
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private static final Color DEFAULT_PARSER_NOTICE_COLOR = Color.RED;
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/**
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* Constructor.
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*/
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public RSyntaxTextAreaHighlighter() {
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markedOccurrences = new ArrayList<SyntaxLayeredHighlightInfoImpl>();
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parserHighlights = new ArrayList<SyntaxLayeredHighlightInfoImpl>(0); // Often unused
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}
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/**
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* Adds a special "marked occurrence" highlight.
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*
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* @param start
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* @param end
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* @param p
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* @return A tag to reference the highlight later.
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* @throws BadLocationException
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* @see #clearMarkOccurrencesHighlights()
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*/
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Object addMarkedOccurrenceHighlight(int start, int end,
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SmartHighlightPainter p) throws BadLocationException {
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Document doc = textArea.getDocument();
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TextUI mapper = textArea.getUI();
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// Always layered highlights for marked occurrences.
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SyntaxLayeredHighlightInfoImpl i = new SyntaxLayeredHighlightInfoImpl();
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i.setPainter(p);
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i.setStartOffset(doc.createPosition(start));
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// HACK: Use "end-1" to prevent chars the user types at the "end" of
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// the highlight to be absorbed into the highlight (default Highlight
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// behavior).
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i.setEndOffset(doc.createPosition(end-1));
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markedOccurrences.add(i);
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mapper.damageRange(textArea, start, end);
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return i;
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}
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/**
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* Adds a highlight from a parser.
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*
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* @param notice The notice from a {@link Parser}.
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* @return A tag with which to reference the highlight.
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* @throws BadLocationException
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* @see #clearParserHighlights()
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* @see #clearParserHighlights(Parser)
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*/
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HighlightInfo addParserHighlight(ParserNotice notice, HighlightPainter p)
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throws BadLocationException {
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Document doc = textArea.getDocument();
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TextUI mapper = textArea.getUI();
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int start = notice.getOffset();
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int end = 0;
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if (start==-1) { // Could just define an invalid line number
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int line = notice.getLine();
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Element root = doc.getDefaultRootElement();
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if (line>=0 && line<root.getElementCount()) {
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Element elem = root.getElement(line);
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start = elem.getStartOffset();
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end = elem.getEndOffset();
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}
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}
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else {
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end = start + notice.getLength();
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}
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// Always layered highlights for parser highlights.
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SyntaxLayeredHighlightInfoImpl i = new SyntaxLayeredHighlightInfoImpl();
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i.setPainter(p);
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i.setStartOffset(doc.createPosition(start));
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// HACK: Use "end-1" to prevent chars the user types at the "end" of
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// the highlight to be absorbed into the highlight (default Highlight
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// behavior).
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i.setEndOffset(doc.createPosition(end-1));
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i.notice = notice;//i.color = notice.getColor();
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parserHighlights.add(i);
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mapper.damageRange(textArea, start, end);
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return i;
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}
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/**
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* Removes all "marked occurrences" highlights from the view.
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*
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* @see #addMarkedOccurrenceHighlight(int, int, SmartHighlightPainter)
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*/
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void clearMarkOccurrencesHighlights() {
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// Don't remove via an iterator; since our List is an ArrayList, this
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// implies tons of System.arrayCopy()s
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for (HighlightInfo info : markedOccurrences) {
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repaintListHighlight(info);
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}
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markedOccurrences.clear();
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}
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/**
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* Removes all parser highlights.
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*
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* @see #addParserHighlight(ParserNotice, javax.swing.text.Highlighter.HighlightPainter)
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*/
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void clearParserHighlights() {
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// Don't remove via an iterator; since our List is an ArrayList, this
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// implies tons of System.arrayCopy()s
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for (int i=0; i<parserHighlights.size(); i++) {
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repaintListHighlight(parserHighlights.get(i));
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}
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parserHighlights.clear();
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}
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/**
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* Removes all of the highlights for a specific parser.
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*
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* @param parser The parser.
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*/
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public void clearParserHighlights(Parser parser) {
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Iterator<SyntaxLayeredHighlightInfoImpl> i = parserHighlights.iterator();
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while (i.hasNext()) {
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SyntaxLayeredHighlightInfoImpl info = i.next();
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if (info.notice.getParser()==parser) {
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if (info.width > 0 && info.height > 0) {
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textArea.repaint(info.x, info.y, info.width, info.height);
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}
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i.remove();
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void deinstall(JTextComponent c) {
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super.deinstall(c);
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markedOccurrences.clear();
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parserHighlights.clear();
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}
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/**
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* Returns a list of "marked occurrences" in the text area. If there are
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* no marked occurrences, this will be an empty list.
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*
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* @return The list of marked occurrences, or an empty list if none. The
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* contents of this list will be of type {@link DocumentRange}.
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*/
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public List<DocumentRange> getMarkedOccurrences() {
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List<DocumentRange> list = new ArrayList<DocumentRange>(markedOccurrences.size());
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for (HighlightInfo info : markedOccurrences) {
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int start = info.getStartOffset();
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int end = info.getEndOffset() + 1; // HACK
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if (start <= end) {
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// Occasionally a Marked Occurrence can have a lost end offset
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// but not start offset (replacing entire text content with
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// new content, and a marked occurrence is on the last token
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// in the document).
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DocumentRange range = new DocumentRange(start, end);
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list.add(range);
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}
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}
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return list;
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}
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@Override
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public void paintLayeredHighlights(Graphics g, int lineStart, int lineEnd,
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Shape viewBounds, JTextComponent editor, View view) {
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paintListLayered(g, lineStart,lineEnd, viewBounds, editor, view, markedOccurrences);
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super.paintLayeredHighlights(g, lineStart, lineEnd, viewBounds, editor, view);
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paintListLayered(g, lineStart,lineEnd, viewBounds, editor, view, parserHighlights);
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}
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/**
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* Removes a parser highlight from this view.
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*
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* @param tag The reference to the highlight.
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* @see #addParserHighlight(ParserNotice, javax.swing.text.Highlighter.HighlightPainter)
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*/
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void removeParserHighlight(HighlightInfo tag) {
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repaintListHighlight(tag);
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parserHighlights.remove(tag);
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}
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/**
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* Highlight info implementation used for parser notices and marked
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* occurrences.
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*/
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private static class SyntaxLayeredHighlightInfoImpl extends
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LayeredHighlightInfoImpl {
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private ParserNotice notice;//Color color; // Used only by Parser highlights.
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@Override
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public Color getColor() {
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//return color;
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Color color = null;
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if (notice!=null) {
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color = notice.getColor();
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if (color==null) {
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color = DEFAULT_PARSER_NOTICE_COLOR;
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}
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}
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return color;
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}
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@Override
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public String toString() {
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return "[SyntaxLayeredHighlightInfoImpl: " +
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"startOffs=" + getStartOffset() +
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", endOffs=" + getEndOffset() +
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", color=" + getColor() +
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"]";
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}
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}
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}
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