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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2010 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.server.wm;
import static android.os.Trace.TRACE_TAG_WINDOW_MANAGER;
import static android.view.WindowManager.INPUT_CONSUMER_NAVIGATION;
import static android.view.WindowManager.INPUT_CONSUMER_PIP;
import static android.view.WindowManager.INPUT_CONSUMER_RECENTS_ANIMATION;
import static android.view.WindowManager.INPUT_CONSUMER_WALLPAPER;
import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_DISABLE_WALLPAPER_TOUCH_EVENTS;
import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_KEYGUARD;
import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_FOCUS_LIGHT;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_INPUT;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_TASK_POSITIONING;
import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
import android.graphics.Rect;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Process;
import android.os.Trace;
import android.os.UserHandle;
import android.util.ArrayMap;
import android.util.Log;
import android.util.Slog;
import android.view.InputApplicationHandle;
import android.view.InputChannel;
import android.view.InputEventReceiver;
import android.view.InputWindowHandle;
import android.view.SurfaceControl;
import com.android.server.AnimationThread;
import com.android.server.policy.WindowManagerPolicy;
import java.io.PrintWriter;
import java.util.Set;
import java.util.function.Consumer;
final class InputMonitor {
private final WindowManagerService mService;
// Current window with input focus for keys and other non-touch events. May be null.
private WindowState mInputFocus;
// When true, need to call updateInputWindowsLw().
private boolean mUpdateInputWindowsNeeded = true;
private boolean mUpdateInputWindowsPending;
private boolean mApplyImmediately;
// Currently focused input window handle.
private InputWindowHandle mFocusedInputWindowHandle;
private boolean mDisableWallpaperTouchEvents;
private final Rect mTmpRect = new Rect();
private final UpdateInputForAllWindowsConsumer mUpdateInputForAllWindowsConsumer;
private final int mDisplayId;
private final DisplayContent mDisplayContent;
private boolean mDisplayRemoved;
private final SurfaceControl.Transaction mInputTransaction;
private final Handler mHandler;
/**
* The set of input consumer added to the window manager by name, which consumes input events
* for the windows below it.
*/
private final ArrayMap mInputConsumers = new ArrayMap();
private static final class EventReceiverInputConsumer extends InputConsumerImpl
implements WindowManagerPolicy.InputConsumer {
private InputMonitor mInputMonitor;
private final InputEventReceiver mInputEventReceiver;
EventReceiverInputConsumer(WindowManagerService service, InputMonitor monitor,
Looper looper, String name,
InputEventReceiver.Factory inputEventReceiverFactory,
int clientPid, UserHandle clientUser, int displayId) {
super(service, null /* token */, name, null /* inputChannel */, clientPid, clientUser,
displayId);
mInputMonitor = monitor;
mInputEventReceiver = inputEventReceiverFactory.createInputEventReceiver(
mClientChannel, looper);
}
@Override
public void dismiss() {
synchronized (mService.mGlobalLock) {
if (mInputMonitor.destroyInputConsumer(mWindowHandle.name)) {
mInputEventReceiver.dispose();
}
}
}
}
private final Runnable mUpdateInputWindows = new Runnable() {
@Override
public void run() {
synchronized (mService.mGlobalLock) {
mUpdateInputWindowsPending = false;
mUpdateInputWindowsNeeded = false;
if (mDisplayRemoved) {
return;
}
// Populate the input window list with information about all of the windows that
// could potentially receive input.
// As an optimization, we could try to prune the list of windows but this turns
// out to be difficult because only the native code knows for sure which window
// currently has touch focus.
// If there's a drag in flight, provide a pseudo-window to catch drag input
final boolean inDrag = mService.mDragDropController.dragDropActiveLocked();
final boolean inPositioning =
mService.mTaskPositioningController.isPositioningLocked();
if (inPositioning) {
if (DEBUG_TASK_POSITIONING) {
Log.d(TAG_WM, "Inserting window handle for repositioning");
}
mService.mTaskPositioningController.showInputSurface(mInputTransaction,
mDisplayId);
} else {
mService.mTaskPositioningController.hideInputSurface(mInputTransaction,
mDisplayId);
}
// Add all windows on the default display.
mUpdateInputForAllWindowsConsumer.updateInputWindows(inDrag);
}
}
};
public InputMonitor(WindowManagerService service, int displayId) {
mService = service;
mDisplayContent = mService.mRoot.getDisplayContent(displayId);
mDisplayId = displayId;
mInputTransaction = mService.mTransactionFactory.make();
mHandler = AnimationThread.getHandler();
mUpdateInputForAllWindowsConsumer = new UpdateInputForAllWindowsConsumer();
}
void onDisplayRemoved() {
mHandler.removeCallbacks(mUpdateInputWindows);
mService.mInputManager.onDisplayRemoved(mDisplayId);
mDisplayRemoved = true;
}
private void addInputConsumer(String name, InputConsumerImpl consumer) {
mInputConsumers.put(name, consumer);
consumer.linkToDeathRecipient();
updateInputWindowsLw(true /* force */);
}
boolean destroyInputConsumer(String name) {
if (disposeInputConsumer(mInputConsumers.remove(name))) {
updateInputWindowsLw(true /* force */);
return true;
}
return false;
}
private boolean disposeInputConsumer(InputConsumerImpl consumer) {
if (consumer != null) {
consumer.disposeChannelsLw();
consumer.hide(mInputTransaction);
return true;
}
return false;
}
InputConsumerImpl getInputConsumer(String name) {
return mInputConsumers.get(name);
}
void layoutInputConsumers(int dw, int dh) {
try {
Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "layoutInputConsumer");
for (int i = mInputConsumers.size() - 1; i >= 0; i--) {
mInputConsumers.valueAt(i).layout(mInputTransaction, dw, dh);
}
} finally {
Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
}
}
// The visibility of the input consumers is recomputed each time we
// update the input windows. We use a model where consumers begin invisible
// (set so by this function) and must meet some condition for visibility on each update.
void resetInputConsumers(SurfaceControl.Transaction t) {
for (int i = mInputConsumers.size() - 1; i >= 0; i--) {
mInputConsumers.valueAt(i).hide(t);
}
}
WindowManagerPolicy.InputConsumer createInputConsumer(Looper looper, String name,
InputEventReceiver.Factory inputEventReceiverFactory) {
if (mInputConsumers.containsKey(name)) {
throw new IllegalStateException("Existing input consumer found with name: " + name
+ ", display: " + mDisplayId);
}
final EventReceiverInputConsumer consumer = new EventReceiverInputConsumer(mService,
this, looper, name, inputEventReceiverFactory, Process.myPid(),
UserHandle.SYSTEM, mDisplayId);
addInputConsumer(name, consumer);
return consumer;
}
void createInputConsumer(IBinder token, String name, InputChannel inputChannel, int clientPid,
UserHandle clientUser) {
if (mInputConsumers.containsKey(name)) {
throw new IllegalStateException("Existing input consumer found with name: " + name
+ ", display: " + mDisplayId);
}
final InputConsumerImpl consumer = new InputConsumerImpl(mService, token, name,
inputChannel, clientPid, clientUser, mDisplayId);
switch (name) {
case INPUT_CONSUMER_WALLPAPER:
consumer.mWindowHandle.hasWallpaper = true;
break;
case INPUT_CONSUMER_PIP:
// The touchable region of the Pip input window is cropped to the bounds of the
// stack, and we need FLAG_NOT_TOUCH_MODAL to ensure other events fall through
consumer.mWindowHandle.layoutParamsFlags |= FLAG_NOT_TOUCH_MODAL;
break;
}
addInputConsumer(name, consumer);
}
void populateInputWindowHandle(final InputWindowHandle inputWindowHandle,
final WindowState child, int flags, final int type, final boolean isVisible,
final boolean hasFocus, final boolean hasWallpaper) {
// Add a window to our list of input windows.
inputWindowHandle.name = child.toString();
flags = child.getSurfaceTouchableRegion(inputWindowHandle, flags);
inputWindowHandle.layoutParamsFlags = flags;
inputWindowHandle.layoutParamsType = type;
inputWindowHandle.dispatchingTimeoutNanos = child.getInputDispatchingTimeoutNanos();
inputWindowHandle.visible = isVisible;
inputWindowHandle.canReceiveKeys = child.canReceiveKeys();
inputWindowHandle.hasFocus = hasFocus;
inputWindowHandle.hasWallpaper = hasWallpaper;
inputWindowHandle.paused = child.mAppToken != null ? child.mAppToken.paused : false;
inputWindowHandle.layer = child.mLayer;
inputWindowHandle.ownerPid = child.mSession.mPid;
inputWindowHandle.ownerUid = child.mSession.mUid;
inputWindowHandle.inputFeatures = child.mAttrs.inputFeatures;
inputWindowHandle.displayId = child.getDisplayId();
final Rect frame = child.getFrameLw();
inputWindowHandle.frameLeft = frame.left;
inputWindowHandle.frameTop = frame.top;
inputWindowHandle.frameRight = frame.right;
inputWindowHandle.frameBottom = frame.bottom;
// Surface insets are hardcoded to be the same in all directions
// and we could probably deprecate the "left/right/top/bottom" concept.
// we avoid reintroducing this concept by just choosing one of them here.
inputWindowHandle.surfaceInset = child.getAttrs().surfaceInsets.left;
if (child.mGlobalScale != 1) {
// If we are scaling the window, input coordinates need
// to be inversely scaled to map from what is on screen
// to what is actually being touched in the UI.
inputWindowHandle.scaleFactor = 1.0f/child.mGlobalScale;
} else {
inputWindowHandle.scaleFactor = 1;
}
if (DEBUG_INPUT) {
Slog.d(TAG_WM, "addInputWindowHandle: "
+ child + ", " + inputWindowHandle);
}
if (hasFocus) {
mFocusedInputWindowHandle = inputWindowHandle;
}
}
void setUpdateInputWindowsNeededLw() {
mUpdateInputWindowsNeeded = true;
}
/* Updates the cached window information provided to the input dispatcher. */
void updateInputWindowsLw(boolean force) {
if (!force && !mUpdateInputWindowsNeeded) {
return;
}
scheduleUpdateInputWindows();
}
private void scheduleUpdateInputWindows() {
if (mDisplayRemoved) {
return;
}
if (!mUpdateInputWindowsPending) {
mUpdateInputWindowsPending = true;
mHandler.post(mUpdateInputWindows);
}
}
void updateInputWindowsImmediately() {
if (mUpdateInputWindowsPending) {
mApplyImmediately = true;
mUpdateInputWindows.run();
mApplyImmediately = false;
}
}
/* Called when the current input focus changes.
* Layer assignment is assumed to be complete by the time this is called.
*/
public void setInputFocusLw(WindowState newWindow, boolean updateInputWindows) {
if (DEBUG_FOCUS_LIGHT || DEBUG_INPUT) {
Slog.d(TAG_WM, "Input focus has changed to " + newWindow);
}
if (newWindow != mInputFocus) {
if (newWindow != null && newWindow.canReceiveKeys()) {
// Displaying a window implicitly causes dispatching to be unpaused.
// This is to protect against bugs if someone pauses dispatching but
// forgets to resume.
newWindow.mToken.paused = false;
}
mInputFocus = newWindow;
setUpdateInputWindowsNeededLw();
if (updateInputWindows) {
updateInputWindowsLw(false /*force*/);
}
}
}
public void setFocusedAppLw(AppWindowToken newApp) {
// Focused app has changed.
if (newApp == null) {
mService.mInputManager.setFocusedApplication(mDisplayId, null);
} else {
final InputApplicationHandle handle = newApp.mInputApplicationHandle;
handle.name = newApp.toString();
handle.dispatchingTimeoutNanos = newApp.mInputDispatchingTimeoutNanos;
mService.mInputManager.setFocusedApplication(mDisplayId, handle);
}
}
public void pauseDispatchingLw(WindowToken window) {
if (! window.paused) {
if (DEBUG_INPUT) {
Slog.v(TAG_WM, "Pausing WindowToken " + window);
}
window.paused = true;
updateInputWindowsLw(true /*force*/);
}
}
public void resumeDispatchingLw(WindowToken window) {
if (window.paused) {
if (DEBUG_INPUT) {
Slog.v(TAG_WM, "Resuming WindowToken " + window);
}
window.paused = false;
updateInputWindowsLw(true /*force*/);
}
}
void dump(PrintWriter pw, String prefix) {
final Set inputConsumerKeys = mInputConsumers.keySet();
if (!inputConsumerKeys.isEmpty()) {
pw.println(prefix + "InputConsumers:");
for (String key : inputConsumerKeys) {
mInputConsumers.get(key).dump(pw, key, prefix);
}
}
}
private final class UpdateInputForAllWindowsConsumer implements Consumer {
InputConsumerImpl navInputConsumer;
InputConsumerImpl pipInputConsumer;
InputConsumerImpl wallpaperInputConsumer;
InputConsumerImpl recentsAnimationInputConsumer;
private boolean mAddInputConsumerHandle;
private boolean mAddPipInputConsumerHandle;
private boolean mAddWallpaperInputConsumerHandle;
private boolean mAddRecentsAnimationInputConsumerHandle;
boolean inDrag;
WallpaperController wallpaperController;
// An invalid window handle that tells SurfaceFlinger not update the input info.
final InputWindowHandle mInvalidInputWindow = new InputWindowHandle(null, null, mDisplayId);
private void updateInputWindows(boolean inDrag) {
Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "updateInputWindows");
navInputConsumer = getInputConsumer(INPUT_CONSUMER_NAVIGATION);
pipInputConsumer = getInputConsumer(INPUT_CONSUMER_PIP);
wallpaperInputConsumer = getInputConsumer(INPUT_CONSUMER_WALLPAPER);
recentsAnimationInputConsumer = getInputConsumer(INPUT_CONSUMER_RECENTS_ANIMATION);
mAddInputConsumerHandle = navInputConsumer != null;
mAddPipInputConsumerHandle = pipInputConsumer != null;
mAddWallpaperInputConsumerHandle = wallpaperInputConsumer != null;
mAddRecentsAnimationInputConsumerHandle = recentsAnimationInputConsumer != null;
mTmpRect.setEmpty();
mDisableWallpaperTouchEvents = false;
this.inDrag = inDrag;
wallpaperController = mDisplayContent.mWallpaperController;
resetInputConsumers(mInputTransaction);
mDisplayContent.forAllWindows(this,
true /* traverseTopToBottom */);
if (mAddWallpaperInputConsumerHandle) {
wallpaperInputConsumer.show(mInputTransaction, 0);
}
if (mApplyImmediately) {
mInputTransaction.apply();
} else {
mDisplayContent.getPendingTransaction().merge(mInputTransaction);
mDisplayContent.scheduleAnimation();
}
Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
}
@Override
public void accept(WindowState w) {
final InputChannel inputChannel = w.mInputChannel;
final InputWindowHandle inputWindowHandle = w.mInputWindowHandle;
if (inputChannel == null || inputWindowHandle == null || w.mRemoved
|| w.cantReceiveTouchInput()) {
if (w.mWinAnimator.hasSurface()) {
mInputTransaction.setInputWindowInfo(
w.mWinAnimator.mSurfaceController.mSurfaceControl, mInvalidInputWindow);
}
// Skip this window because it cannot possibly receive input.
return;
}
final int flags = w.mAttrs.flags;
final int privateFlags = w.mAttrs.privateFlags;
final int type = w.mAttrs.type;
final boolean hasFocus = w.isFocused();
final boolean isVisible = w.isVisibleLw();
if (mAddRecentsAnimationInputConsumerHandle) {
final RecentsAnimationController recentsAnimationController =
mService.getRecentsAnimationController();
if (recentsAnimationController != null
&& recentsAnimationController.shouldApplyInputConsumer(w.mAppToken)) {
if (recentsAnimationController.updateInputConsumerForApp(
recentsAnimationInputConsumer.mWindowHandle, hasFocus)) {
recentsAnimationInputConsumer.show(mInputTransaction, w);
mAddRecentsAnimationInputConsumerHandle = false;
}
}
}
if (w.inPinnedWindowingMode()) {
if (mAddPipInputConsumerHandle) {
// Update the bounds of the Pip input consumer to match the window bounds.
w.getBounds(mTmpRect);
pipInputConsumer.layout(mInputTransaction, mTmpRect);
// The touchable region is relative to the surface top-left
mTmpRect.offsetTo(0, 0);
pipInputConsumer.mWindowHandle.touchableRegion.set(mTmpRect);
pipInputConsumer.show(mInputTransaction, w);
mAddPipInputConsumerHandle = false;
}
}
if (mAddInputConsumerHandle
&& inputWindowHandle.layer <= navInputConsumer.mWindowHandle.layer) {
navInputConsumer.show(mInputTransaction, w);
mAddInputConsumerHandle = false;
}
if (mAddWallpaperInputConsumerHandle) {
if (w.mAttrs.type == TYPE_WALLPAPER && w.isVisibleLw()) {
// Add the wallpaper input consumer above the first visible wallpaper.
wallpaperInputConsumer.show(mInputTransaction, w);
mAddWallpaperInputConsumerHandle = false;
}
}
if ((privateFlags & PRIVATE_FLAG_DISABLE_WALLPAPER_TOUCH_EVENTS) != 0) {
mDisableWallpaperTouchEvents = true;
}
final boolean hasWallpaper = wallpaperController.isWallpaperTarget(w)
&& (privateFlags & PRIVATE_FLAG_KEYGUARD) == 0
&& !mDisableWallpaperTouchEvents;
// If there's a drag in progress and 'child' is a potential drop target,
// make sure it's been told about the drag
if (inDrag && isVisible && w.getDisplayContent().isDefaultDisplay) {
mService.mDragDropController.sendDragStartedIfNeededLocked(w);
}
populateInputWindowHandle(
inputWindowHandle, w, flags, type, isVisible, hasFocus, hasWallpaper);
if (w.mWinAnimator.hasSurface()) {
mInputTransaction.setInputWindowInfo(
w.mWinAnimator.mSurfaceController.mSurfaceControl, inputWindowHandle);
}
}
}
}
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