| /* |
| * Copyright 2000-2012 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.keymap.impl; |
| |
| import com.intellij.openapi.keymap.Keymap; |
| import com.intellij.openapi.keymap.KeymapManagerListener; |
| import com.intellij.openapi.keymap.ex.KeymapManagerEx; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.lang.ref.Reference; |
| import java.lang.ref.WeakReference; |
| |
| class WeakKeymapManagerListener implements KeymapManagerListener { |
| private final KeymapManagerEx myKeymapManager; |
| private final Reference<KeymapManagerListener> myRef; |
| |
| WeakKeymapManagerListener(@NotNull KeymapManagerEx keymapManager, @NotNull KeymapManagerListener delegate) { |
| myKeymapManager = keymapManager; |
| myRef = new WeakReference<KeymapManagerListener>(delegate); |
| } |
| |
| public boolean isDead() { |
| return myRef.get() == null; |
| } |
| |
| public boolean isWrapped(@NotNull KeymapManagerListener listener) { |
| return myRef.get() == listener; |
| } |
| |
| @Override |
| public void activeKeymapChanged(Keymap keymap) { |
| KeymapManagerListener delegate = myRef.get(); |
| if (delegate == null) { |
| myKeymapManager.removeKeymapManagerListener(this); |
| } |
| else { |
| delegate.activeKeymapChanged(keymap); |
| } |
| } |
| } |