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/*
* Copyright 2000-2009 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.vcs.changes.issueLinks;
import com.intellij.ui.ClickListener;
import com.intellij.ui.SimpleColoredComponent;
import com.intellij.util.Consumer;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
public abstract class LinkMouseListenerBase<T> extends ClickListener implements MouseMotionListener {
public static void installSingleTagOn(@NotNull SimpleColoredComponent component) {
new LinkMouseListenerBase<Object>() {
@Nullable
@Override
protected Object getTagAt(@NotNull MouseEvent e) {
//noinspection unchecked
return ((SimpleColoredComponent)e.getSource()).getFragmentTagAt(e.getX());
}
@Override
protected void handleTagClick(@Nullable Object tag, @NotNull MouseEvent event) {
if (tag != null) {
if (tag instanceof Consumer) {
//noinspection unchecked
((Consumer<MouseEvent>)tag).consume(event);
}
else {
((Runnable)tag).run();
}
}
}
}.installOn(component);
}
@Nullable
protected abstract T getTagAt(@NotNull MouseEvent e);
@Override
public boolean onClick(@NotNull MouseEvent e, int clickCount) {
if (e.getButton() == MouseEvent.BUTTON1) {
handleTagClick(getTagAt(e), e);
}
return false;
}
protected void handleTagClick(@Nullable T tag, @NotNull MouseEvent event) {
if (tag instanceof Runnable) {
((Runnable)tag).run();
}
}
@Override
public void mouseDragged(MouseEvent e) {
}
@Override
public void mouseMoved(MouseEvent e) {
Component component = (Component)e.getSource();
Object tag = getTagAt(e);
if (tag != null) {
component.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
}
else {
component.setCursor(Cursor.getDefaultCursor());
}
}
@Override
public void installOn(@NotNull Component component) {
super.installOn(component);
component.addMouseMotionListener(this);
}
}
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