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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.ui.popup;
import com.intellij.openapi.ui.popup.JBPopup;
import com.intellij.openapi.util.Key;
import com.intellij.psi.PsiElement;
import com.intellij.ui.ListUtil;
import com.intellij.ui.components.JBList;
import com.intellij.ui.table.JBTable;
import com.intellij.ui.treeStructure.Tree;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreePath;
/**
* Use this class to make various hints like QuickDocumentation, ShowImplementations, etc.
* respond to the selection change in the original component like ProjectView, various GoTo popups, etc.
*
* @author gregsh
*/
public abstract class HintUpdateSupply {
private static final Key<HintUpdateSupply> HINT_UPDATE_MARKER = Key.create("HINT_UPDATE_MARKER");
@Nullable
private JBPopup myHint;
@Nullable
public static HintUpdateSupply getSupply(@NotNull JComponent component) {
return (HintUpdateSupply)component.getClientProperty(HINT_UPDATE_MARKER);
}
public static void hideHint(@NotNull JComponent component) {
HintUpdateSupply supply = getSupply(component);
if (supply != null) supply.hideHint();
}
protected HintUpdateSupply(@NotNull JComponent component) {
installSupply(component);
}
public HintUpdateSupply(@NotNull final JBTable table) {
installSupply(table);
ListSelectionListener listener = new ListSelectionListener() {
@Override
public void valueChanged(final ListSelectionEvent e) {
if (!isHintVisible(HintUpdateSupply.this.myHint) || isSelectedByMouse(table)) return;
int selected = ((ListSelectionModel)e.getSource()).getLeadSelectionIndex();
int rowCount = table.getRowCount();
if (selected == -1 || rowCount == 0) return;
PsiElement element = getPsiElementForHint(table.getValueAt(Math.min(selected, rowCount - 1), 0));
if (element != null && element.isValid()) {
updateHint(element);
}
}
};
table.getSelectionModel().addListSelectionListener(listener);
table.getColumnModel().getSelectionModel().addListSelectionListener(listener);
}
public HintUpdateSupply(@NotNull final Tree tree) {
installSupply(tree);
tree.addTreeSelectionListener(new TreeSelectionListener() {
@Override
public void valueChanged(final TreeSelectionEvent e) {
if (!isHintVisible(HintUpdateSupply.this.myHint) || isSelectedByMouse(tree)) return;
TreePath path = tree.getSelectionPath();
if (path != null) {
final PsiElement psiElement = getPsiElementForHint(path.getLastPathComponent());
if (psiElement != null && psiElement.isValid()) {
updateHint(psiElement);
}
}
}
});
}
public HintUpdateSupply(@NotNull final JBList list) {
installSupply(list);
list.addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(final ListSelectionEvent e) {
if (!isHintVisible(HintUpdateSupply.this.myHint) || isSelectedByMouse(list)) return;
Object[] selectedValues = ((JList)e.getSource()).getSelectedValues();
if (selectedValues.length != 1) return;
PsiElement element = getPsiElementForHint(selectedValues[0]);
if (element != null && element.isValid()) {
updateHint(element);
}
}
});
}
@Nullable
protected abstract PsiElement getPsiElementForHint(@Nullable Object selectedValue);
private void installSupply(@NotNull JComponent component) {
component.putClientProperty(HINT_UPDATE_MARKER, this);
}
public void registerHint(JBPopup hint) {
hideHint();
myHint = hint;
}
public void hideHint() {
if (isHintVisible(myHint)) {
myHint.cancel();
}
myHint = null;
}
public void updateHint(PsiElement element) {
if (!isHintVisible(myHint)) return;
PopupUpdateProcessorBase updateProcessor = myHint.getUserData(PopupUpdateProcessorBase.class);
if (updateProcessor != null) {
updateProcessor.updatePopup(element);
}
}
@Contract("!null->true")
private static boolean isHintVisible(JBPopup hint) {
return hint != null && hint.isVisible();
}
private static boolean isSelectedByMouse(@NotNull JComponent c) {
return Boolean.TRUE.equals(c.getClientProperty(ListUtil.SELECTED_BY_MOUSE_EVENT));
}
}
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