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RSyntaxTextArea is the syntax highlighting text editor for Swing applications. Features include syntax highlighting for 40+ languages, code folding, code completion, regex find and replace, macros, code templates, undo/redo, line numbering and bracket matching.
/*
* 03/09/2013
*
* XmlOccurrenceMarker - Marks occurrences of the current token for XML.
*
* This library is distributed under a modified BSD license. See the included
* LICENSE file for details.
*/
package org.fife.ui.rsyntaxtextarea;
import java.util.ArrayList;
import java.util.List;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import org.fife.ui.rtextarea.SmartHighlightPainter;
/**
* Marks occurrences of the current token for XML.
*
* @author Robert Futrell
* @version 1.0
*/
public class XmlOccurrenceMarker implements OccurrenceMarker {
private static final char[] CLOSE_TAG_START = { '<', '/' };
private static final char[] TAG_SELF_CLOSE = { '/', '>' };
@Override
public Token getTokenToMark(RSyntaxTextArea textArea) {
return HtmlOccurrenceMarker.getTagNameTokenForCaretOffset(
textArea, this);
}
@Override
public boolean isValidType(RSyntaxTextArea textArea, Token t) {
return textArea.getMarkOccurrencesOfTokenType(t.getType());
}
@Override
public void markOccurrences(RSyntaxDocument doc, Token t,
RSyntaxTextAreaHighlighter h, SmartHighlightPainter p) {
char[] lexeme = t.getLexeme().toCharArray();
int tokenOffs = t.getOffset();
Element root = doc.getDefaultRootElement();
int lineCount = root.getElementCount();
int curLine = root.getElementIndex(t.getOffset());
int depth = 0;
// For now, we only check for tags on the current line, for
// simplicity. Tags spanning multiple lines aren't common anyway.
boolean found = false;
boolean forward = true;
t = doc.getTokenListForLine(curLine);
while (t!=null && t.isPaintable()) {
if (t.getType()==Token.MARKUP_TAG_DELIMITER) {
if (t.isSingleChar('<') && t.getOffset()+1==tokenOffs) {
found = true;
break;
}
else if (t.is(CLOSE_TAG_START) && t.getOffset()+2==tokenOffs) {
found = true;
forward = false;
break;
}
}
t = t.getNextToken();
}
if (!found) {
return;
}
if (forward) {
t = t.getNextToken().getNextToken();
do {
while (t!=null && t.isPaintable()) {
if (t.getType()==Token.MARKUP_TAG_DELIMITER) {
if (t.is(CLOSE_TAG_START)) {
Token match = t.getNextToken();
if (match!=null && match.is(lexeme)) {
if (depth>0) {
depth--;
}
else {
try {
int end = match.getOffset() + match.length();
h.addMarkedOccurrenceHighlight(match.getOffset(), end, p);
end = tokenOffs + match.length();
h.addMarkedOccurrenceHighlight(tokenOffs, end, p);
} catch (BadLocationException ble) {
ble.printStackTrace(); // Never happens
}
return; // We're done!
}
}
}
else if (t.isSingleChar('<')) {
t = t.getNextToken();
if (t!=null && t.is(lexeme)) {
depth++;
}
}
}
t = t==null ? null : t.getNextToken();
}
if (++curLine openCloses = new ArrayList<>();
boolean inPossibleMatch = false;
t = doc.getTokenListForLine(curLine);
final int endBefore = tokenOffs - 2; // Stop before "')) {
inPossibleMatch = false;
}
else if (inPossibleMatch && t.is(TAG_SELF_CLOSE)) {
openCloses.remove(openCloses.size()-1);
inPossibleMatch = false;
}
else if (t.is(CLOSE_TAG_START)) {
Token next = t.getNextToken();
if (next!=null) {
// Invalid XML might not have a match
if (next.is(lexeme)) {
openCloses.add(new Entry(false, next));
}
t = next;
}
}
}
t = t.getNextToken();
}
for (int i=openCloses.size()-1; i>=0; i--) {
Entry entry = openCloses.get(i);
depth += entry.open ? -1 : 1;
if (depth==-1) {
try {
Token match = entry.t;
int end = match.getOffset() + match.length();
h.addMarkedOccurrenceHighlight(match.getOffset(), end, p);
end = tokenOffs + match.length();
h.addMarkedOccurrenceHighlight(tokenOffs, end, p);
} catch (BadLocationException ble) {
ble.printStackTrace(); // Never happens
}
openCloses.clear();
return;
}
}
openCloses.clear();
if (--curLine>=0) {
t = doc.getTokenListForLine(curLine);
}
} while (curLine>=0);
}
}
/**
* Used internally when searching backward for a matching "open" tag.
*/
private static class Entry {
private boolean open;
private Token t;
Entry(boolean open, Token t) {
this.open = open;
this.t = t;
}
}
}