/*
* Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License
* at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jsyntaxpane.actions;
import java.awt.event.ActionEvent;
import javax.swing.text.DefaultEditorKit;
import javax.swing.text.JTextComponent;
import javax.swing.text.PlainDocument;
import javax.swing.text.TextAction;
import jsyntaxpane.util.Configuration;
/**
* IndentAction is used to replace Tabs with spaces. If there is selected
* text, then the lines spanning the selection will be shifted
* right by one tab-width space character
*/
public class IndentAction extends DefaultEditorKit.InsertTabAction
implements SyntaxAction {
public IndentAction() {
super();
}
@Override
public void actionPerformed(ActionEvent e) {
JTextComponent target = getTextComponent(e);
if (target != null) {
String selected = target.getSelectedText();
if (selected == null) {
PlainDocument pDoc = (PlainDocument) target.getDocument();
Integer tabStop = (Integer) pDoc.getProperty(PlainDocument.tabSizeAttribute);
int lineStart = pDoc.getParagraphElement(target.getCaretPosition()).getStartOffset();
int column = target.getCaretPosition() - lineStart;
int needed = tabStop - (column % tabStop);
target.replaceSelection(ActionUtils.SPACES.substring(0, needed));
} else {
String[] lines = ActionUtils.getSelectedLines(target);
int start = target.getSelectionStart();
StringBuilder sb = new StringBuilder();
for (String line : lines) {
sb.append('\t');
sb.append(line);
sb.append('\n');
}
target.replaceSelection(sb.toString());
target.select(start, start + sb.length());
}
}
}
public void config(Configuration config, String prefix, String name) {
}
public TextAction getAction(String key) {
return this;
}
}