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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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 com.intellij.openapi.wm.ex;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.impl.EditorComponentImpl;
import com.intellij.openapi.fileEditor.impl.EditorWindowHolder;
import com.intellij.openapi.util.Computable;
import com.intellij.util.ReflectionUtil;
import org.jetbrains.annotations.NotNull;
import javax.swing.*;
import javax.swing.text.JTextComponent;
import java.awt.*;
public class IdeFocusTraversalPolicy extends LayoutFocusTraversalPolicyExt {
private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.wm.ex.IdeFocusTraversalPolicy");
protected Component getDefaultComponentImpl(Container focusCycleRoot) {
if (!(focusCycleRoot instanceof JComponent)) {
return super.getDefaultComponent(focusCycleRoot);
}
return getPreferredFocusedComponent((JComponent)focusCycleRoot, this);
}
public static JComponent getPreferredFocusedComponent(@NotNull final JComponent component) {
return getPreferredFocusedComponent(component, null);
}
/**
* @return preferred focused component inside the specified <code>component</code>.
* Method can return component itself if the <code>component</code> is legal
* (JTextFiel)focusable
*
*/
public static JComponent getPreferredFocusedComponent(@NotNull final JComponent component, final FocusTraversalPolicy policyToIgnore) {
if (!component.isVisible()) {
return null;
}
final FocusTraversalPolicy focusTraversalPolicy = getFocusTraversalPolicyAwtImpl(component);
if (focusTraversalPolicy != null && focusTraversalPolicy != policyToIgnore) {
if (focusTraversalPolicy.getClass().getName().indexOf("LegacyGlueFocusTraversalPolicy") >=0) {
return component;
}
Component defaultComponent;
if (focusTraversalPolicy instanceof LayoutFocusTraversalPolicyExt) {
final LayoutFocusTraversalPolicyExt extPolicy = (LayoutFocusTraversalPolicyExt)focusTraversalPolicy;
defaultComponent = extPolicy.queryImpl(new Computable<Component>() {
@Override
public Component compute() {
return extPolicy.getDefaultComponent(component);
}
});
} else {
defaultComponent = focusTraversalPolicy.getDefaultComponent(component);
}
if (defaultComponent instanceof JComponent) {
return (JComponent)defaultComponent;
}
}
if (component instanceof JTabbedPane) {
final JTabbedPane tabbedPane = (JTabbedPane)component;
final Component selectedComponent = tabbedPane.getSelectedComponent();
if (selectedComponent instanceof JComponent) {
return getPreferredFocusedComponent((JComponent)selectedComponent);
}
return null;
}
if(_accept(component)) {
return component;
}
for (Component ca : component.getComponents()) {
if (!(ca instanceof JComponent)) {
continue;
}
final JComponent c = getPreferredFocusedComponent((JComponent)ca);
if (c != null) {
return c;
}
}
return null;
}
private static FocusTraversalPolicy getFocusTraversalPolicyAwtImpl(final JComponent component) {
return ReflectionUtil.getField(Container.class, component, FocusTraversalPolicy.class, "focusTraversalPolicy");
}
protected final boolean accept(final Component aComponent) {
if (aComponent instanceof JComponent) {
return _accept((JComponent)aComponent);
}
return super.accept(aComponent);
}
private static boolean _accept(final JComponent component) {
if (!component.isEnabled() || !component.isVisible() || !component.isFocusable()) {
return false;
}
/** TODO[anton,vova] implement Policy in Editor component instead */
if (component instanceof EditorComponentImpl || component instanceof EditorWindowHolder) {
return true;
}
if(component instanceof JTextComponent){
return ((JTextComponent)component).isEditable();
}
return
component instanceof AbstractButton ||
component instanceof JList ||
component instanceof JTree ||
component instanceof JTable ||
component instanceof JComboBox;
}
}
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