/*
* Copyright 2000-2015 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.diff.tools.util;
import com.intellij.diff.DiffContext;
import com.intellij.diff.requests.DiffRequest;
import com.intellij.diff.tools.holders.EditorHolder;
import com.intellij.diff.util.DiffUserDataKeys;
import com.intellij.diff.util.DiffUtil;
import com.intellij.diff.util.Side;
import com.intellij.diff.util.ThreeSide;
import org.jetbrains.annotations.NotNull;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.util.List;
public abstract class FocusTrackerSupport<S> {
@NotNull
public abstract S getCurrentSide();
public abstract void setCurrentSide(@NotNull S side);
public abstract void processContextHints(@NotNull DiffRequest request, @NotNull DiffContext context);
public abstract void updateContextHints(@NotNull DiffRequest request, @NotNull DiffContext context);
//
// Impl
//
public static class Twoside extends FocusTrackerSupport<Side> {
@NotNull private Side myCurrentSide;
public Twoside(@NotNull List<? extends EditorHolder> holders) {
assert holders.size() == 2;
myCurrentSide = Side.RIGHT;
addListener(holders, Side.LEFT);
addListener(holders, Side.RIGHT);
}
@Override
@NotNull
public Side getCurrentSide() {
return myCurrentSide;
}
@Override
public void setCurrentSide(@NotNull Side side) {
myCurrentSide = side;
}
@Override
public void processContextHints(@NotNull DiffRequest request, @NotNull DiffContext context) {
Side side = DiffUtil.getUserData(request, context, DiffUserDataKeys.PREFERRED_FOCUS_SIDE);
if (side != null) setCurrentSide(side);
}
@Override
public void updateContextHints(@NotNull DiffRequest request, @NotNull DiffContext context) {
context.putUserData(DiffUserDataKeys.PREFERRED_FOCUS_SIDE, myCurrentSide);
}
private void addListener(@NotNull List<? extends EditorHolder> holders, @NotNull Side side) {
side.select(holders).installFocusListener(new MyFocusListener(side));
}
private class MyFocusListener extends FocusAdapter {
@NotNull private final Side mySide;
private MyFocusListener(@NotNull Side side) {
mySide = side;
}
@Override
public void focusGained(FocusEvent e) {
myCurrentSide = mySide;
}
}
}
public static class Threeside extends FocusTrackerSupport<ThreeSide> {
@NotNull private ThreeSide myCurrentSide;
public Threeside(@NotNull List<? extends EditorHolder> holders) {
myCurrentSide = ThreeSide.BASE;
addListener(holders, ThreeSide.LEFT);
addListener(holders, ThreeSide.BASE);
addListener(holders, ThreeSide.RIGHT);
}
@Override
@NotNull
public ThreeSide getCurrentSide() {
return myCurrentSide;
}
@Override
public void setCurrentSide(@NotNull ThreeSide side) {
myCurrentSide = side;
}
@Override
public void processContextHints(@NotNull DiffRequest request, @NotNull DiffContext context) {
ThreeSide side = DiffUtil.getUserData(request, context, DiffUserDataKeys.PREFERRED_FOCUS_THREESIDE);
if (side != null) setCurrentSide(side);
}
@Override
public void updateContextHints(@NotNull DiffRequest request, @NotNull DiffContext context) {
context.putUserData(DiffUserDataKeys.PREFERRED_FOCUS_THREESIDE, myCurrentSide);
}
private void addListener(@NotNull List<? extends EditorHolder> holders, @NotNull ThreeSide side) {
side.select(holders).installFocusListener(new MyFocusListener(side));
}
private class MyFocusListener extends FocusAdapter {
@NotNull private final ThreeSide mySide;
private MyFocusListener(@NotNull ThreeSide side) {
mySide = side;
}
@Override
public void focusGained(FocusEvent e) {
myCurrentSide = mySide;
}
}
}
}