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/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsp.ui.internal.text;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jst.jsp.ui.internal.JSPUIPlugin;
import org.eclipse.jst.jsp.ui.internal.preferences.JSPUIPreferenceNames;
import org.eclipse.swt.graphics.Point;
import org.eclipse.wst.sse.ui.typing.AbstractCharacterPairInserter;
public class JavaCharacterPairInserter extends AbstractCharacterPairInserter implements IPropertyChangeListener {
private boolean fCloseBrackets = true;
private boolean fCloseStrings = true;
protected boolean shouldPair(ISourceViewer viewer, char c) {
IDocument document = viewer.getDocument();
final Point selection = viewer.getSelectedRange();
final int offset = selection.x;
final int length = selection.y;
try {
IRegion startLine= document.getLineInformationOfOffset(offset);
IRegion endLine= document.getLineInformationOfOffset(offset + length);
JavaHeuristicScanner scanner = new JavaHeuristicScanner(document);
int nextToken = scanner.nextToken(offset + length, endLine.getOffset() + endLine.getLength());
String next = nextToken == Symbols.TokenEOF ? null : document.get(offset, scanner.getPosition() - offset).trim();
int prevToken = scanner.previousToken(offset - 1, startLine.getOffset());
int prevTokenOffset = scanner.getPosition() + 1;
String previous = prevToken == Symbols.TokenEOF ? null : document.get(prevTokenOffset, offset - prevTokenOffset).trim();
switch (c) {
case '(':
if (!fCloseBrackets || nextToken == Symbols.TokenLPAREN || nextToken == Symbols.TokenIDENT || next != null && next.length() > 1)
return false;
break;
case '<':
if (!fCloseBrackets || nextToken == Symbols.TokenLESSTHAN
|| prevToken != Symbols.TokenLBRACE
&& prevToken != Symbols.TokenRBRACE
&& prevToken != Symbols.TokenSEMICOLON
&& prevToken != Symbols.TokenSYNCHRONIZED
&& prevToken != Symbols.TokenSTATIC
&& (prevToken != Symbols.TokenIDENT || !isAngularIntroducer(previous))
&& prevToken != Symbols.TokenEOF)
return false;
break;
case '[':
if (!fCloseBrackets || nextToken == Symbols.TokenIDENT || next != null && next.length() > 1)
return false;
break;
case '\'':
case '"':
if (!fCloseStrings || nextToken == Symbols.TokenIDENT
|| prevToken == Symbols.TokenIDENT
|| prevToken == Symbols.TokenSQUOTE
|| nextToken == Symbols.TokenSQUOTE
|| prevToken == Symbols.TokenDQUOTE
|| nextToken == Symbols.TokenDQUOTE
|| next != null && next.length() > 1
|| previous != null && previous.length() > 1)
return false;
break;
default:
return false;
}
} catch (BadLocationException e) {
return false;
}
return true;
}
private boolean isAngularIntroducer(String identifier) {
return identifier.length() > 0
&& (Character.isUpperCase(identifier.charAt(0))
|| identifier.startsWith("final") //$NON-NLS-1$
|| identifier.startsWith("public") //$NON-NLS-1$
|| identifier.startsWith("public") //$NON-NLS-1$
|| identifier.startsWith("protected") //$NON-NLS-1$
|| identifier.startsWith("private")); //$NON-NLS-1$
}
protected char getPair(char c) {
switch (c) {
case '\'':
case '"':
return c;
case '(':
return ')';
case '[':
return ']';
case '<':
return '>';
default:
throw new IllegalArgumentException();
}
}
protected char getEscapeChar(char c) {
switch (c) {
case '\'':
case '"':
return '\\';
default:
return 0;
}
}
public boolean hasPair(char c) {
switch (c) {
case '"':
case '\'':
case '[':
case '(':
case '<':
return true;
default:
return false;
}
}
public void initialize() {
IPreferenceStore store = JSPUIPlugin.getInstance().getPreferenceStore();
fCloseStrings = store.getBoolean(JSPUIPreferenceNames.TYPING_CLOSE_STRINGS);
fCloseBrackets = store.getBoolean(JSPUIPreferenceNames.TYPING_CLOSE_BRACKETS);
store.addPropertyChangeListener(this);
}
public void dispose() {
JSPUIPlugin.getInstance().getPreferenceStore().removePropertyChangeListener(this);
}
public void propertyChange(PropertyChangeEvent event) {
if (JSPUIPreferenceNames.TYPING_CLOSE_BRACKETS.equals(event.getProperty()))
fCloseBrackets = ((Boolean) event.getNewValue()).booleanValue();
else if (JSPUIPreferenceNames.TYPING_CLOSE_STRINGS.equals(event.getProperty()))
fCloseStrings = ((Boolean) event.getNewValue()).booleanValue();
}
}
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