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/*******************************************************************************
* Copyright (c) 2000, 2015 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.search.internal.ui.util;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.dialogs.TypeFilteringDialog;
import org.eclipse.search.internal.ui.SearchMessages;
public class FileTypeEditor extends SelectionAdapter implements DisposeListener {
private Combo fTextField;
private Button fBrowseButton;
private final static String TYPE_DELIMITER= SearchMessages.FileTypeEditor_typeDelimiter;
public final static String FILE_PATTERN_NEGATOR= "!"; //$NON-NLS-1$
private static final Comparator<String> FILE_TYPES_COMPARATOR= new Comparator<String>() {
@Override
public int compare(String fp1, String fp2) {
boolean isNegative1= fp1.startsWith(FILE_PATTERN_NEGATOR);
boolean isNegative2= fp2.startsWith(FILE_PATTERN_NEGATOR);
if (isNegative1 != isNegative2) {
return isNegative1 ? 1 : -1;
}
return fp1.compareTo(fp2);
}
};
public FileTypeEditor(Combo textField, Button browseButton) {
fTextField= textField;
fBrowseButton= browseButton;
fTextField.addDisposeListener(this);
fBrowseButton.addDisposeListener(this);
fBrowseButton.addSelectionListener(this);
}
@Override
public void widgetDisposed(DisposeEvent event) {
Widget widget= event.widget;
if (widget == fTextField)
fTextField= null;
else if (widget == fBrowseButton)
fBrowseButton= null;
}
@Override
public void widgetSelected(SelectionEvent event) {
if (event.widget == fBrowseButton)
handleBrowseButton();
}
public String[] getFileTypes() {
Set<String> result= new HashSet<>();
StringTokenizer tokenizer= new StringTokenizer(fTextField.getText(), TYPE_DELIMITER);
while (tokenizer.hasMoreTokens()) {
String currentExtension= tokenizer.nextToken().trim();
result.add(currentExtension);
}
return result.toArray(new String[result.size()]);
}
public void setFileTypes(String[] types) {
fTextField.setText(typesToString(types));
}
protected void handleBrowseButton() {
TypeFilteringDialog dialog= new TypeFilteringDialog(fTextField.getShell(), Arrays.asList(getFileTypes()));
if (dialog.open() == Window.OK) {
Object[] result= dialog.getResult();
HashSet<String> patterns= new HashSet<>();
boolean starIncluded= false;
for (int i= 0; i < result.length; i++) {
String curr= result[i].toString();
if (curr.equals("*")) { //$NON-NLS-1$
starIncluded= true;
} else {
patterns.add("*." + curr); //$NON-NLS-1$
}
}
if (patterns.isEmpty() && starIncluded) { // remove star when other file extensions active
patterns.add("*"); //$NON-NLS-1$
}
String[] filePatterns= patterns.toArray(new String[patterns.size()]);
Arrays.sort(filePatterns);
setFileTypes(filePatterns);
}
}
public static String typesToString(String[] types) {
Arrays.sort(types, FILE_TYPES_COMPARATOR);
StringBuffer result= new StringBuffer();
for (int i= 0; i < types.length; i++) {
if (i > 0) {
result.append(TYPE_DELIMITER);
result.append(" "); //$NON-NLS-1$
}
result.append(types[i]);
}
return result.toString();
}
}
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