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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.util.Log;
import android.view.OrientationEventListener;
import android.view.Surface;
import java.util.Arrays;
import java.util.List;
import android.app.Activity;
public class GeckoScreenOrientationListener {
private static final String LOGTAG = "GeckoScreenOrientationListener";
static class OrientationEventListenerImpl extends OrientationEventListener {
public OrientationEventListenerImpl(Context c) {
super(c);
}
@Override
public void onOrientationChanged(int aOrientation) {
GeckoScreenOrientationListener.getInstance().updateScreenOrientation();
}
}
static private GeckoScreenOrientationListener sInstance = null;
// Make sure that any change in dom/base/ScreenOrientation.h happens here too.
static public final short eScreenOrientation_None = 0;
static public final short eScreenOrientation_PortraitPrimary = 1; // PR_BIT(0)
static public final short eScreenOrientation_PortraitSecondary = 2; // PR_BIT(1)
static public final short eScreenOrientation_LandscapePrimary = 4; // PR_BIT(2)
static public final short eScreenOrientation_LandscapeSecondary = 8; // PR_BIT(3)
static private final short DEFAULT_ORIENTATION = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
private short mOrientation;
private OrientationEventListenerImpl mListener = null;
// Whether the listener should be listening to changes.
private boolean mShouldBeListening = false;
// Whether the listener should notify Gecko that a change happened.
private boolean mShouldNotify = false;
// The default orientation to use if nothing is specified
private short mDefaultOrientation;
private static final String DEFAULT_ORIENTATION_PREF = "app.orientation.default";
private GeckoScreenOrientationListener() {
mListener = new OrientationEventListenerImpl(GeckoAppShell.getContext());
PrefsHelper.getPref(DEFAULT_ORIENTATION_PREF, new PrefsHelper.PrefHandlerBase() {
@Override public void prefValue(String pref, String value) {
mDefaultOrientation = orientationFromStringArray(value);
unlockScreenOrientation();
}
});
mDefaultOrientation = DEFAULT_ORIENTATION;
}
public static GeckoScreenOrientationListener getInstance() {
if (sInstance == null) {
sInstance = new GeckoScreenOrientationListener();
}
return sInstance;
}
public void start() {
mShouldBeListening = true;
updateScreenOrientation();
if (mShouldNotify) {
startListening();
}
}
public void stop() {
mShouldBeListening = false;
if (mShouldNotify) {
stopListening();
}
}
public void enableNotifications() {
updateScreenOrientation();
mShouldNotify = true;
if (mShouldBeListening) {
startListening();
}
}
public void disableNotifications() {
mShouldNotify = false;
if (mShouldBeListening) {
stopListening();
}
}
private void startListening() {
mListener.enable();
}
private void stopListening() {
mListener.disable();
}
private short orientationFromStringArray(String val) {
List<String> orientations = Arrays.asList(val.split(","));
// if nothing is listed, return unspecified
if (orientations.size() == 0)
return DEFAULT_ORIENTATION;
// we dont' support multiple orientations yet. To avoid developer confusion,
// just take the first one listed
return orientationFromString(orientations.get(0));
}
private short orientationFromString(String val) {
if ("portrait".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT;
else if ("landscape".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE;
else if ("portrait-primary".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
else if ("portrait-secondary".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
else if ("landscape-primary".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
else if ("landscape-secondary".equals(val))
return (short)ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
return DEFAULT_ORIENTATION;
}
private void updateScreenOrientation() {
Context context = GeckoAppShell.getContext();
int rotation = mDefaultOrientation;
if (context instanceof Activity) {
rotation = ((Activity)context).getWindowManager().getDefaultDisplay().getRotation();
}
short previousOrientation = mOrientation;
if (rotation == Surface.ROTATION_0) {
mOrientation = eScreenOrientation_PortraitPrimary;
} else if (rotation == Surface.ROTATION_180) {
mOrientation = eScreenOrientation_PortraitSecondary;
} else if (rotation == Surface.ROTATION_270) {
mOrientation = eScreenOrientation_LandscapeSecondary;
} else if (rotation == Surface.ROTATION_90) {
mOrientation = eScreenOrientation_LandscapePrimary;
} else {
Log.e(LOGTAG, "Unexpected value received! (" + rotation + ")");
return;
}
if (mShouldNotify && mOrientation != previousOrientation) {
GeckoAppShell.sendEventToGecko(GeckoEvent.createScreenOrientationEvent(mOrientation));
}
}
public short getScreenOrientation() {
return mOrientation;
}
public void lockScreenOrientation(int aOrientation) {
int orientation = 0;
switch (aOrientation) {
case eScreenOrientation_PortraitPrimary:
orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
break;
case eScreenOrientation_PortraitSecondary:
orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
break;
case eScreenOrientation_PortraitPrimary | eScreenOrientation_PortraitSecondary:
orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT;
break;
case eScreenOrientation_LandscapePrimary:
orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
break;
case eScreenOrientation_LandscapeSecondary:
orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
break;
case eScreenOrientation_LandscapePrimary | eScreenOrientation_LandscapeSecondary:
orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE;
break;
default:
Log.e(LOGTAG, "Unexpected value received! (" + aOrientation + ")");
return;
}
if (GeckoAppShell.getContext() instanceof Activity)
((Activity)GeckoAppShell.getContext()).setRequestedOrientation(orientation);
updateScreenOrientation();
}
public void unlockScreenOrientation() {
if (!(GeckoAppShell.getContext() instanceof Activity))
return;
if (((Activity)GeckoAppShell.getContext()).getRequestedOrientation() == mDefaultOrientation)
return;
((Activity)GeckoAppShell.getContext()).setRequestedOrientation(mDefaultOrientation);
updateScreenOrientation();
}
}
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