jsyntaxpane.actions.UnindentAction Maven / Gradle / Ivy
/*
* Copyright 2008 Ayman Al-Sairafi [email protected]
*
* 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.JTextComponent;
import jsyntaxpane.SyntaxDocument;
/**
* This is usually mapped to Shift-TAB to unindent the selection. The
* current line, or the selected lines are un-indented by the tabstop of the
* document.
*/
public class UnindentAction extends DefaultSyntaxAction {
public UnindentAction() {
super("UNINDENT");
}
@Override
public void actionPerformed(JTextComponent target, SyntaxDocument sDoc,
int dot, ActionEvent e) {
String indent = ActionUtils.getTab(target);
String[] lines = ActionUtils.getSelectedLines(target);
int start = target.getSelectionStart();
StringBuilder sb = new StringBuilder();
for (String line : lines) {
if (line.startsWith(indent)) {
sb.append(line.substring(indent.length()));
} else if (line.startsWith("\t")) {
sb.append(line.substring(1));
} else {
sb.append(line);
}
sb.append('\n');
}
target.replaceSelection(sb.toString());
target.select(start, start + sb.length());
}
}
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