| 1 | // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.ui; |
| 6 | |
| 7 | import android.view.View; |
| 8 | |
| 9 | import org.chromium.base.JNINamespace; |
| 10 | import org.chromium.ui.ViewAndroidDelegate; |
| 11 | import org.chromium.ui.WindowAndroid; |
| 12 | |
| 13 | /** |
| 14 | * From the Chromium architecture point of view, ViewAndroid and its native counterpart |
| 15 | * serve purpose of representing Android view where Chrome expects to have a cross platform |
| 16 | * handle to the system view type. As Views are Java object on Android, this ViewAndroid |
| 17 | * and its native counterpart provide the expected abstractions on the C++ side and allow |
| 18 | * it to be flexibly glued to an actual Android Java View at runtime. |
| 19 | * |
| 20 | * It should only be used where access to Android Views is needed from the C++ code. |
| 21 | */ |
| 22 | @JNINamespace("ui") |
| 23 | public class ViewAndroid { |
| 24 | // Native pointer to the c++ ViewAndroid object. |
| 25 | private int mNativeViewAndroid = 0; |
| 26 | private final ViewAndroidDelegate mViewAndroidDelegate; |
| 27 | private final WindowAndroid mWindowAndroid; |
| 28 | private int mKeepScreenOnCount; |
| 29 | private View mKeepScreenOnView; |
| 30 | |
| 31 | /** |
| 32 | * Constructs a View object. |
| 33 | */ |
| 34 | public ViewAndroid(WindowAndroid nativeWindow, ViewAndroidDelegate viewAndroidDelegate) { |
| 35 | mWindowAndroid = nativeWindow; |
| 36 | mViewAndroidDelegate = viewAndroidDelegate; |
| 37 | mNativeViewAndroid = nativeInit(mWindowAndroid.getNativePointer()); |
| 38 | } |
| 39 | |
| 40 | public ViewAndroidDelegate getViewAndroidDelegate() { |
| 41 | return mViewAndroidDelegate; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Destroys the c++ ViewAndroid object if one has been created. |
| 46 | */ |
| 47 | public void destroy() { |
| 48 | if (mNativeViewAndroid != 0) { |
| 49 | nativeDestroy(mNativeViewAndroid); |
| 50 | mNativeViewAndroid = 0; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Returns a pointer to the c++ AndroidWindow object. |
| 56 | * @return A pointer to the c++ AndroidWindow. |
| 57 | */ |
| 58 | public int getNativePointer() { |
| 59 | return mNativeViewAndroid; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Set KeepScreenOn flag. If the flag already set, increase mKeepScreenOnCount. |
| 64 | */ |
| 65 | public void incrementKeepScreenOnCount() { |
| 66 | mKeepScreenOnCount++; |
| 67 | if (mKeepScreenOnCount == 1) { |
| 68 | mKeepScreenOnView = mViewAndroidDelegate.acquireAnchorView(); |
| 69 | mKeepScreenOnView.setKeepScreenOn(true); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Decrease mKeepScreenOnCount, if it is decreased to 0, remove the flag. |
| 75 | */ |
| 76 | public void decrementKeepScreenOnCount() { |
| 77 | assert mKeepScreenOnCount > 0; |
| 78 | mKeepScreenOnCount--; |
| 79 | if (mKeepScreenOnCount == 0) { |
| 80 | mViewAndroidDelegate.releaseAnchorView(mKeepScreenOnView); |
| 81 | mKeepScreenOnView = null; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | private native int nativeInit(int windowPtr); |
| 86 | private native void nativeDestroy(int nativeViewAndroid); |
| 87 | } |