/*
* Copyright (C) 2012 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.display;
import com.android.internal.util.DumpUtils;
import com.android.internal.util.IndentingPrintWriter;
import android.content.Context;
import android.database.ContentObserver;
import android.graphics.SurfaceTexture;
import android.os.Handler;
import android.os.IBinder;
import android.provider.Settings;
import android.util.DisplayMetrics;
import android.util.Slog;
import android.view.Display;
import android.view.Gravity;
import android.view.Surface;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A display adapter that uses overlay windows to simulate secondary displays
* for development purposes. Use Development Settings to enable one or more
* overlay displays.
* <p>
* This object has two different handlers (which may be the same) which must not
* get confused. The main handler is used to posting messages to the display manager
* service as usual. The UI handler is only used by the {@link OverlayDisplayWindow}.
* </p><p>
* Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock.
* </p>
*/
final class OverlayDisplayAdapter extends DisplayAdapter {
static final String TAG = "OverlayDisplayAdapter";
static final boolean DEBUG = false;
private static final int MIN_WIDTH = 100;
private static final int MIN_HEIGHT = 100;
private static final int MAX_WIDTH = 4096;
private static final int MAX_HEIGHT = 4096;
private static final Pattern SETTING_PATTERN =
Pattern.compile("(\\d+)x(\\d+)/(\\d+)");
private final Handler mUiHandler;
private final ArrayList<OverlayDisplayHandle> mOverlays =
new ArrayList<OverlayDisplayHandle>();
private String mCurrentOverlaySetting = "";
// Called with SyncRoot lock held.
public OverlayDisplayAdapter(DisplayManagerService.SyncRoot syncRoot,
Context context, Handler handler, Listener listener, Handler uiHandler) {
super(syncRoot, context, handler, listener, TAG);
mUiHandler = uiHandler;
}
@Override
public void dumpLocked(PrintWriter pw) {
super.dumpLocked(pw);
pw.println("mCurrentOverlaySetting=" + mCurrentOverlaySetting);
pw.println("mOverlays: size=" + mOverlays.size());
for (OverlayDisplayHandle overlay : mOverlays) {
overlay.dumpLocked(pw);
}
}
@Override
public void registerLocked() {
super.registerLocked();
getHandler().post(new Runnable() {
@Override
public void run() {
getContext().getContentResolver().registerContentObserver(
Settings.Global.getUriFor(Settings.Global.OVERLAY_DISPLAY_DEVICES),
true, new ContentObserver(getHandler()) {
@Override
public void onChange(boolean selfChange) {
updateOverlayDisplayDevices();
}
});
updateOverlayDisplayDevices();
}
});
}
private void updateOverlayDisplayDevices() {
synchronized (getSyncRoot()) {
updateOverlayDisplayDevicesLocked();
}
}
private void updateOverlayDisplayDevicesLocked() {
String value = Settings.Global.getString(getContext().getContentResolver(),
Settings.Global.OVERLAY_DISPLAY_DEVICES);
if (value == null) {
value = "";
}
if (value.equals(mCurrentOverlaySetting)) {
return;
}
mCurrentOverlaySetting = value;
if (!mOverlays.isEmpty()) {
Slog.i(TAG, "Dismissing all overlay display devices.");
for (OverlayDisplayHandle overlay : mOverlays) {
overlay.dismissLocked();
}
mOverlays.clear();
}
int count = 0;
for (String part : value.split(";")) {
Matcher matcher = SETTING_PATTERN.matcher(part);
if (matcher.matches()) {
if (count >= 4) {
Slog.w(TAG, "Too many overlay display devices specified: " + value);
break;
}
try {
int width = Integer.parseInt(matcher.group(1), 10);
int height = Integer.parseInt(matcher.group(2), 10);
int densityDpi = Integer.parseInt(matcher.group(3), 10);
if (width >= MIN_WIDTH && width <= MAX_WIDTH
&& height >= MIN_HEIGHT && height <= MAX_HEIGHT
&& densityDpi >= DisplayMetrics.DENSITY_LOW
&& densityDpi <= DisplayMetrics.DENSITY_XXHIGH) {
int number = ++count;
String name = getContext().getResources().getString(
com.android.internal.R.string.display_manager_overlay_display_name,
number);
int gravity = chooseOverlayGravity(number);
Slog.i(TAG, "Showing overlay display device #" + number
+ ": name=" + name + ", width=" + width + ", height=" + height
+ ", densityDpi=" + densityDpi);
mOverlays.add(new OverlayDisplayHandle(name,
width, height, densityDpi, gravity));
continue;
}
} catch (NumberFormatException ex) {
}
} else if (part.isEmpty()) {
continue;
}
Slog.w(TAG, "Malformed overlay display devices setting: " + value);
}
}
private static int chooseOverlayGravity(int overlayNumber) {
switch (overlayNumber) {
case 1:
return Gravity.TOP | Gravity.LEFT;
case 2:
return Gravity.BOTTOM | Gravity.RIGHT;
case 3:
return Gravity.TOP | Gravity.RIGHT;
case 4:
default:
return Gravity.BOTTOM | Gravity.LEFT;
}
}
private final class OverlayDisplayDevice extends DisplayDevice {
private final String mName;
private final int mWidth;
private final int mHeight;
private final float mRefreshRate;
private final int mDensityDpi;
private Surface mSurface;
private SurfaceTexture mSurfaceTexture;
private DisplayDeviceInfo mInfo;
public OverlayDisplayDevice(IBinder displayToken, String name,
int width, int height, float refreshRate, int densityDpi,
SurfaceTexture surfaceTexture) {
super(OverlayDisplayAdapter.this, displayToken);
mName = name;
mWidth = width;
mHeight = height;
mRefreshRate = refreshRate;
mDensityDpi = densityDpi;
mSurfaceTexture = surfaceTexture;
}
public void clearSurfaceTextureLocked() {
if (mSurfaceTexture != null) {
mSurfaceTexture = null;
}
sendTraversalRequestLocked();
}
@Override
public void performTraversalInTransactionLocked() {
if (mSurfaceTexture != null) {
if (mSurface == null) {
mSurface = new Surface(mSurfaceTexture);
}
setSurfaceInTransactionLocked(mSurface);
} else {
setSurfaceInTransactionLocked(null);
if (mSurface != null) {
mSurface.destroy();
mSurface = null;
}
}
}
@Override
public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
if (mInfo == null) {
mInfo = new DisplayDeviceInfo();
mInfo.name = mName;
mInfo.width = mWidth;
mInfo.height = mHeight;
mInfo.refreshRate = mRefreshRate;
mInfo.densityDpi = mDensityDpi;
mInfo.xDpi = mDensityDpi;
mInfo.yDpi = mDensityDpi;
mInfo.flags = 0;
mInfo.type = Display.TYPE_OVERLAY;
mInfo.touch = DisplayDeviceInfo.TOUCH_NONE;
}
return mInfo;
}
}
/**
* Functions as a handle for overlay display devices which are created and
* destroyed asynchronously.
*
* Guarded by the {@link DisplayManagerService.SyncRoot} lock.
*/
private final class OverlayDisplayHandle implements OverlayDisplayWindow.Listener {
private final String mName;
private final int mWidth;
private final int mHeight;
private final int mDensityDpi;
private final int mGravity;
private OverlayDisplayWindow mWindow;
private OverlayDisplayDevice mDevice;
public OverlayDisplayHandle(String name,
int width, int height, int densityDpi, int gravity) {
mName = name;
mWidth = width;
mHeight = height;
mDensityDpi = densityDpi;
mGravity = gravity;
mUiHandler.post(mShowRunnable);
}
public void dismissLocked() {
mUiHandler.removeCallbacks(mShowRunnable);
mUiHandler.post(mDismissRunnable);
}
// Called on the UI thread.
@Override
public void onWindowCreated(SurfaceTexture surfaceTexture, float refreshRate) {
synchronized (getSyncRoot()) {
IBinder displayToken = Surface.createDisplay(mName, false);
mDevice = new OverlayDisplayDevice(displayToken, mName,
mWidth, mHeight, refreshRate, mDensityDpi, surfaceTexture);
sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_ADDED);
}
}
// Called on the UI thread.
@Override
public void onWindowDestroyed() {
synchronized (getSyncRoot()) {
if (mDevice != null) {
mDevice.clearSurfaceTextureLocked();
sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_REMOVED);
}
}
}
public void dumpLocked(PrintWriter pw) {
pw.println(" " + mName + ":");
pw.println(" mWidth=" + mWidth);
pw.println(" mHeight=" + mHeight);
pw.println(" mDensityDpi=" + mDensityDpi);
pw.println(" mGravity=" + mGravity);
// Try to dump the window state.
if (mWindow != null) {
final IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " ");
ipw.increaseIndent();
DumpUtils.dumpAsync(mUiHandler, mWindow, ipw, 200);
}
}
// Runs on the UI thread.
private final Runnable mShowRunnable = new Runnable() {
@Override
public void run() {
OverlayDisplayWindow window = new OverlayDisplayWindow(getContext(),
mName, mWidth, mHeight, mDensityDpi, mGravity,
OverlayDisplayHandle.this);
window.show();
synchronized (getSyncRoot()) {
mWindow = window;
}
}
};
// Runs on the UI thread.
private final Runnable mDismissRunnable = new Runnable() {
@Override
public void run() {
OverlayDisplayWindow window;
synchronized (getSyncRoot()) {
window = mWindow;
mWindow = null;
}
if (window != null) {
window.dismiss();
}
}
};
}
}