| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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.android.systemui.util; |
| |
| import android.view.View; |
| |
| import com.android.systemui.SysUiServiceProvider; |
| import com.android.systemui.statusbar.CommandQueue; |
| |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| public class Utils { |
| |
| /** |
| * Allows lambda iteration over a list. It is done in reverse order so it is safe |
| * to add or remove items during the iteration. Skips over null items. |
| */ |
| public static <T> void safeForeach(List<T> list, Consumer<T> c) { |
| for (int i = list.size() - 1; i >= 0; i--) { |
| T item = list.get(i); |
| if (item != null) { |
| c.accept(item); |
| } |
| } |
| } |
| |
| /** |
| * Sets the visibility of an UI element according to the DISABLE_* flags in |
| * {@link android.app.StatusBarManager}. |
| */ |
| public static class DisableStateTracker implements CommandQueue.Callbacks, |
| View.OnAttachStateChangeListener { |
| private final int mMask1; |
| private final int mMask2; |
| private View mView; |
| private boolean mDisabled; |
| |
| public DisableStateTracker(int disableMask, int disable2Mask) { |
| mMask1 = disableMask; |
| mMask2 = disable2Mask; |
| } |
| |
| @Override |
| public void onViewAttachedToWindow(View v) { |
| mView = v; |
| SysUiServiceProvider.getComponent(v.getContext(), CommandQueue.class) |
| .addCallback(this); |
| } |
| |
| @Override |
| public void onViewDetachedFromWindow(View v) { |
| SysUiServiceProvider.getComponent(mView.getContext(), CommandQueue.class) |
| .removeCallback(this); |
| mView = null; |
| } |
| |
| /** |
| * Sets visibility of this {@link View} given the states passed from |
| * {@link com.android.systemui.statusbar.CommandQueue.Callbacks#disable(int, int)}. |
| */ |
| @Override |
| public void disable(int state1, int state2, boolean animate) { |
| final boolean disabled = ((state1 & mMask1) != 0) || ((state2 & mMask2) != 0); |
| if (disabled == mDisabled) return; |
| mDisabled = disabled; |
| mView.setVisibility(disabled ? View.GONE : View.VISIBLE); |
| } |
| |
| /** @return {@code true} if and only if this {@link View} is currently disabled */ |
| public boolean isDisabled() { |
| return mDisabled; |
| } |
| } |
| } |