cc4f7db698
Bug: 5156144 Input channels could leak or simply live longer than they should in some cases. 1. Monitor channels (used by the pointer location overlay) are never unregistered, so they would leak. Added code to handle failures in the receive callback by closing the input channel. 2. The DragState held onto its input window and application handles even after the input channel was disposed. Added code to null these handles out when they are no longer needed. 3. Input channels previously used as input event targets would stick around until the targets were cleared (usually on the next event). Added code to detect when the input dispatcher is in an idle state and to proactively clear the targets then to ensure that resources are released promptly. 4. Native input window handles held onto the input channel even after the input window was removed from the input dispatcher. Consequently, the input channel would not be disposed until the input window handle itself was freed. Since the input window handle is held from managed code, this meant that the window's input channel could stick around until the next GC. Refactored the input window handle to separate the properties (info) and identify (handle) state into different objects. Then modified the dispatcher to release the properties (info) when no longer needed, including the input channel. 7. The pointer location overlay does not actually use its standard input channel, only the monitor input channel. Added INPUT_FEATURE_NO_INPUT_CHANNEL to allow windows to request that they not be provided with an input channel at all. Improved some of the error handling logic to emit the status code as part of the exception message. Change-Id: I01988d4391a70c6678c8b0e936ca051af680b1a5
108 lines
3.0 KiB
Java
108 lines
3.0 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wm;
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import android.graphics.Region;
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import android.view.InputChannel;
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import android.view.WindowManagerPolicy;
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/**
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* Functions as a handle for a window that can receive input.
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* Enables the native input dispatcher to refer indirectly to the window manager's window state.
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* @hide
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*/
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public final class InputWindowHandle {
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// Pointer to the native input window handle.
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// This field is lazily initialized via JNI.
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@SuppressWarnings("unused")
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private int ptr;
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// The input application handle.
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public final InputApplicationHandle inputApplicationHandle;
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// The window manager's window state.
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public final WindowManagerPolicy.WindowState windowState;
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// The input channel associated with the window.
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public InputChannel inputChannel;
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// The window name.
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public String name;
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// Window layout params attributes. (WindowManager.LayoutParams)
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public int layoutParamsFlags;
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public int layoutParamsType;
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// Dispatching timeout.
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public long dispatchingTimeoutNanos;
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// Window frame.
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public int frameLeft;
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public int frameTop;
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public int frameRight;
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public int frameBottom;
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// Global scaling factor applied to touch events when they are dispatched
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// to the window
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public float scaleFactor;
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// Window touchable region.
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public final Region touchableRegion = new Region();
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// Window is visible.
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public boolean visible;
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// Window can receive keys.
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public boolean canReceiveKeys;
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// Window has focus.
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public boolean hasFocus;
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// Window has wallpaper. (window is the current wallpaper target)
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public boolean hasWallpaper;
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// Input event dispatching is paused.
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public boolean paused;
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// Window layer.
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public int layer;
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// Id of process and user that owns the window.
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public int ownerPid;
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public int ownerUid;
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// Window input features.
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public int inputFeatures;
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private native void nativeDispose();
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public InputWindowHandle(InputApplicationHandle inputApplicationHandle,
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WindowManagerPolicy.WindowState windowState) {
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this.inputApplicationHandle = inputApplicationHandle;
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this.windowState = windowState;
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}
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@Override
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protected void finalize() throws Throwable {
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try {
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nativeDispose();
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} finally {
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super.finalize();
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}
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}
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}
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