/*
* 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 android.graphics.Rect;
import android.os.RemoteException;
import android.util.Log;
import android.util.Slog;
import android.view.InputChannel;
import android.view.KeyEvent;
import android.view.WindowManager;
import java.util.ArrayList;
import java.util.Arrays;
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, prevents input dispatch from proceeding until set to false again.
private boolean mInputDispatchFrozen;
// When true, input dispatch proceeds normally. Otherwise all events are dropped.
private boolean mInputDispatchEnabled = true;
// When true, need to call updateInputWindowsLw().
private boolean mUpdateInputWindowsNeeded = true;
// Array of window handles to provide to the input dispatcher.
private InputWindowHandle[] mInputWindowHandles;
private int mInputWindowHandleCount;
// Set to true when the first input device configuration change notification
// is received to indicate that the input devices are ready.
private final Object mInputDevicesReadyMonitor = new Object();
private boolean mInputDevicesReady;
public InputMonitor(WindowManagerService service) {
mService = service;
}
/* Notifies the window manager about a broken input channel.
*
* Called by the InputManager.
*/
public void notifyInputChannelBroken(InputWindowHandle inputWindowHandle) {
if (inputWindowHandle == null) {
return;
}
synchronized (mService.mWindowMap) {
WindowState windowState = (WindowState) inputWindowHandle.windowState;
if (windowState != null) {
Slog.i(WindowManagerService.TAG, "WINDOW DIED " + windowState);
mService.removeWindowLocked(windowState.mSession, windowState);
}
}
}
/* Notifies the window manager about an application that is not responding.
* Returns a new timeout to continue waiting in nanoseconds, or 0 to abort dispatch.
*
* Called by the InputManager.
*/
public long notifyANR(InputApplicationHandle inputApplicationHandle,
InputWindowHandle inputWindowHandle) {
AppWindowToken appWindowToken = null;
if (inputWindowHandle != null) {
synchronized (mService.mWindowMap) {
WindowState windowState = (WindowState) inputWindowHandle.windowState;
if (windowState != null) {
Slog.i(WindowManagerService.TAG, "Input event dispatching timed out sending to "
+ windowState.mAttrs.getTitle());
appWindowToken = windowState.mAppToken;
}
}
}
if (appWindowToken == null && inputApplicationHandle != null) {
appWindowToken = inputApplicationHandle.appWindowToken;
if (appWindowToken != null) {
Slog.i(WindowManagerService.TAG,
"Input event dispatching timed out sending to application "
+ appWindowToken.stringName);
}
}
if (appWindowToken != null && appWindowToken.appToken != null) {
try {
// Notify the activity manager about the timeout and let it decide whether
// to abort dispatching or keep waiting.
boolean abort = appWindowToken.appToken.keyDispatchingTimedOut();
if (! abort) {
// The activity manager declined to abort dispatching.
// Wait a bit longer and timeout again later.
return appWindowToken.inputDispatchingTimeoutNanos;
}
} catch (RemoteException ex) {
}
}
return 0; // abort dispatching
}
private void addInputWindowHandleLw(InputWindowHandle windowHandle) {
if (mInputWindowHandles == null) {
mInputWindowHandles = new InputWindowHandle[16];
}
if (mInputWindowHandleCount >= mInputWindowHandles.length) {
mInputWindowHandles = Arrays.copyOf(mInputWindowHandles,
mInputWindowHandleCount * 2);
}
mInputWindowHandles[mInputWindowHandleCount++] = windowHandle;
}
private void clearInputWindowHandlesLw() {
while (mInputWindowHandleCount != 0) {
mInputWindowHandles[--mInputWindowHandleCount] = null;
}
}
public void setUpdateInputWindowsNeededLw() {
mUpdateInputWindowsNeeded = true;
}
/* Updates the cached window information provided to the input dispatcher. */
public void updateInputWindowsLw(boolean force) {
if (!force && !mUpdateInputWindowsNeeded) {
return;
}
mUpdateInputWindowsNeeded = false;
if (false) Slog.d(WindowManagerService.TAG, ">>>>>> ENTERED updateInputWindowsLw");
// 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.
final ArrayList<WindowState> windows = mService.mWindows;
// If there's a drag in flight, provide a pseudowindow to catch drag input
final boolean inDrag = (mService.mDragState != null);
if (inDrag) {
if (WindowManagerService.DEBUG_DRAG) {
Log.d(WindowManagerService.TAG, "Inserting drag window");
}
final InputWindowHandle dragWindowHandle = mService.mDragState.mDragWindowHandle;
if (dragWindowHandle != null) {
addInputWindowHandleLw(dragWindowHandle);
} else {
Slog.w(WindowManagerService.TAG, "Drag is in progress but there is no "
+ "drag window handle.");
}
}
final int NFW = mService.mFakeWindows.size();
for (int i = 0; i < NFW; i++) {
addInputWindowHandleLw(mService.mFakeWindows.get(i).mWindowHandle);
}
final int N = windows.size();
for (int i = N - 1; i >= 0; i--) {
final WindowState child = windows.get(i);
final InputChannel inputChannel = child.mInputChannel;
final InputWindowHandle inputWindowHandle = child.mInputWindowHandle;
if (inputChannel == null || inputWindowHandle == null || child.mRemoved) {
// Skip this window because it cannot possibly receive input.
continue;
}
final int flags = child.mAttrs.flags;
final int type = child.mAttrs.type;
final boolean hasFocus = (child == mInputFocus);
final boolean isVisible = child.isVisibleLw();
final boolean hasWallpaper = (child == mService.mWallpaperTarget)
&& (type != WindowManager.LayoutParams.TYPE_KEYGUARD);
// 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) {
mService.mDragState.sendDragStartedIfNeededLw(child);
}
// Add a window to our list of input windows.
inputWindowHandle.name = child.toString();
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;
final Rect frame = child.mFrame;
inputWindowHandle.frameLeft = frame.left;
inputWindowHandle.frameTop = frame.top;
inputWindowHandle.frameRight = frame.right;
inputWindowHandle.frameBottom = frame.bottom;
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;
}
child.getTouchableRegion(inputWindowHandle.touchableRegion);
addInputWindowHandleLw(inputWindowHandle);
}
// Send windows to native code.
mService.mInputManager.setInputWindows(mInputWindowHandles);
// Clear the list in preparation for the next round.
clearInputWindowHandlesLw();
if (false) Slog.d(WindowManagerService.TAG, "<<<<<<< EXITED updateInputWindowsLw");
}
/* Notifies that the input device configuration has changed. */
public void notifyConfigurationChanged() {
mService.sendNewConfiguration();
synchronized (mInputDevicesReadyMonitor) {
if (!mInputDevicesReady) {
mInputDevicesReady = true;
mInputDevicesReadyMonitor.notifyAll();
}
}
}
/* Waits until the built-in input devices have been configured. */
public boolean waitForInputDevicesReady(long timeoutMillis) {
synchronized (mInputDevicesReadyMonitor) {
if (!mInputDevicesReady) {
try {
mInputDevicesReadyMonitor.wait(timeoutMillis);
} catch (InterruptedException ex) {
}
}
return mInputDevicesReady;
}
}
/* Notifies that the lid switch changed state. */
public void notifyLidSwitchChanged(long whenNanos, boolean lidOpen) {
mService.mPolicy.notifyLidSwitchChanged(whenNanos, lidOpen);
}
/* Provides an opportunity for the window manager policy to intercept early key
* processing as soon as the key has been read from the device. */
public int interceptKeyBeforeQueueing(
KeyEvent event, int policyFlags, boolean isScreenOn) {
return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags, isScreenOn);
}
/* Provides an opportunity for the window manager policy to intercept early
* motion event processing when the screen is off since these events are normally
* dropped. */
public int interceptMotionBeforeQueueingWhenScreenOff(int policyFlags) {
return mService.mPolicy.interceptMotionBeforeQueueingWhenScreenOff(policyFlags);
}
/* Provides an opportunity for the window manager policy to process a key before
* ordinary dispatch. */
public long interceptKeyBeforeDispatching(
InputWindowHandle focus, KeyEvent event, int policyFlags) {
WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
return mService.mPolicy.interceptKeyBeforeDispatching(windowState, event, policyFlags);
}
/* Provides an opportunity for the window manager policy to process a key that
* the application did not handle. */
public KeyEvent dispatchUnhandledKey(
InputWindowHandle focus, KeyEvent event, int policyFlags) {
WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
return mService.mPolicy.dispatchUnhandledKey(windowState, event, policyFlags);
}
/* 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 (WindowManagerService.DEBUG_INPUT) {
Slog.d(WindowManagerService.TAG, "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(null);
} else {
final InputApplicationHandle handle = newApp.mInputApplicationHandle;
handle.name = newApp.toString();
handle.dispatchingTimeoutNanos = newApp.inputDispatchingTimeoutNanos;
mService.mInputManager.setFocusedApplication(handle);
}
}
public void pauseDispatchingLw(WindowToken window) {
if (! window.paused) {
if (WindowManagerService.DEBUG_INPUT) {
Slog.v(WindowManagerService.TAG, "Pausing WindowToken " + window);
}
window.paused = true;
updateInputWindowsLw(true /*force*/);
}
}
public void resumeDispatchingLw(WindowToken window) {
if (window.paused) {
if (WindowManagerService.DEBUG_INPUT) {
Slog.v(WindowManagerService.TAG, "Resuming WindowToken " + window);
}
window.paused = false;
updateInputWindowsLw(true /*force*/);
}
}
public void freezeInputDispatchingLw() {
if (! mInputDispatchFrozen) {
if (WindowManagerService.DEBUG_INPUT) {
Slog.v(WindowManagerService.TAG, "Freezing input dispatching");
}
mInputDispatchFrozen = true;
updateInputDispatchModeLw();
}
}
public void thawInputDispatchingLw() {
if (mInputDispatchFrozen) {
if (WindowManagerService.DEBUG_INPUT) {
Slog.v(WindowManagerService.TAG, "Thawing input dispatching");
}
mInputDispatchFrozen = false;
updateInputDispatchModeLw();
}
}
public void setEventDispatchingLw(boolean enabled) {
if (mInputDispatchEnabled != enabled) {
if (WindowManagerService.DEBUG_INPUT) {
Slog.v(WindowManagerService.TAG, "Setting event dispatching to " + enabled);
}
mInputDispatchEnabled = enabled;
updateInputDispatchModeLw();
}
}
private void updateInputDispatchModeLw() {
mService.mInputManager.setInputDispatchMode(mInputDispatchEnabled, mInputDispatchFrozen);
}
}