The Tor Browser: widget/android/AndroidJavaWrappers.cpp@b8a032363ba2 (annotated)

widget/android/AndroidJavaWrappers.cpp@b8a032363ba2 (annotated)

widget/android/AndroidJavaWrappers.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
  * 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/. */
 #include "AndroidJavaWrappers.h"
 #include "AndroidBridge.h"
 #include "AndroidBridgeUtilities.h"
 #include "nsIDOMKeyEvent.h"
 #include "nsIWidget.h"
 #include "mozilla/BasicEvents.h"
 #include "mozilla/TouchEvents.h"
 using namespace mozilla;
 using namespace mozilla::dom;
 using namespace mozilla::widget::android;
 jclass AndroidGeckoEvent::jGeckoEventClass = 0;
 jfieldID AndroidGeckoEvent::jActionField = 0;
 jfieldID AndroidGeckoEvent::jTypeField = 0;
 jfieldID AndroidGeckoEvent::jAckNeededField = 0;
 jfieldID AndroidGeckoEvent::jTimeField = 0;
 jfieldID AndroidGeckoEvent::jPoints = 0;
 jfieldID AndroidGeckoEvent::jPointIndicies = 0;
 jfieldID AndroidGeckoEvent::jPressures = 0;
 jfieldID AndroidGeckoEvent::jPointRadii = 0;
 jfieldID AndroidGeckoEvent::jOrientations = 0;
 jfieldID AndroidGeckoEvent::jXField = 0;
 jfieldID AndroidGeckoEvent::jYField = 0;
 jfieldID AndroidGeckoEvent::jZField = 0;
 jfieldID AndroidGeckoEvent::jDistanceField = 0;
 jfieldID AndroidGeckoEvent::jRectField = 0;
 jfieldID AndroidGeckoEvent::jNativeWindowField = 0;
 jfieldID AndroidGeckoEvent::jCharactersField = 0;
 jfieldID AndroidGeckoEvent::jCharactersExtraField = 0;
 jfieldID AndroidGeckoEvent::jDataField = 0;
 jfieldID AndroidGeckoEvent::jDOMPrintableKeyValueField = 0;
 jfieldID AndroidGeckoEvent::jKeyCodeField = 0;
 jfieldID AndroidGeckoEvent::jMetaStateField = 0;
 jfieldID AndroidGeckoEvent::jDomKeyLocationField = 0;
 jfieldID AndroidGeckoEvent::jFlagsField = 0;
 jfieldID AndroidGeckoEvent::jUnicodeCharField = 0;
 jfieldID AndroidGeckoEvent::jBaseUnicodeCharField = 0;
 jfieldID AndroidGeckoEvent::jRepeatCountField = 0;
 jfieldID AndroidGeckoEvent::jCountField = 0;
 jfieldID AndroidGeckoEvent::jStartField = 0;
 jfieldID AndroidGeckoEvent::jEndField = 0;
 jfieldID AndroidGeckoEvent::jPointerIndexField = 0;
 jfieldID AndroidGeckoEvent::jRangeTypeField = 0;
 jfieldID AndroidGeckoEvent::jRangeStylesField = 0;
 jfieldID AndroidGeckoEvent::jRangeLineStyleField = 0;
 jfieldID AndroidGeckoEvent::jRangeBoldLineField = 0;
 jfieldID AndroidGeckoEvent::jRangeForeColorField = 0;
 jfieldID AndroidGeckoEvent::jRangeBackColorField = 0;
 jfieldID AndroidGeckoEvent::jRangeLineColorField = 0;
 jfieldID AndroidGeckoEvent::jLocationField = 0;
 jfieldID AndroidGeckoEvent::jConnectionTypeField = 0;
 jfieldID AndroidGeckoEvent::jIsWifiField = 0;
 jfieldID AndroidGeckoEvent::jDHCPGatewayField = 0;
 jfieldID AndroidGeckoEvent::jScreenOrientationField = 0;
 jfieldID AndroidGeckoEvent::jByteBufferField = 0;
 jfieldID AndroidGeckoEvent::jWidthField = 0;
 jfieldID AndroidGeckoEvent::jHeightField = 0;
 jfieldID AndroidGeckoEvent::jPrefNamesField = 0;
 jclass AndroidGeckoEvent::jDomKeyLocationClass = 0;
 jfieldID AndroidGeckoEvent::jDomKeyLocationValueField = 0;
 jclass AndroidPoint::jPointClass = 0;
 jfieldID AndroidPoint::jXField = 0;
 jfieldID AndroidPoint::jYField = 0;
 jclass AndroidRect::jRectClass = 0;
 jfieldID AndroidRect::jBottomField = 0;
 jfieldID AndroidRect::jLeftField = 0;
 jfieldID AndroidRect::jRightField = 0;
 jfieldID AndroidRect::jTopField = 0;
 jclass AndroidRectF::jRectClass = 0;
 jfieldID AndroidRectF::jBottomField = 0;
 jfieldID AndroidRectF::jLeftField = 0;
 jfieldID AndroidRectF::jRightField = 0;
 jfieldID AndroidRectF::jTopField = 0;
 jclass AndroidLocation::jLocationClass = 0;
 jmethodID AndroidLocation::jGetLatitudeMethod = 0;
 jmethodID AndroidLocation::jGetLongitudeMethod = 0;
 jmethodID AndroidLocation::jGetAltitudeMethod = 0;
 jmethodID AndroidLocation::jGetAccuracyMethod = 0;
 jmethodID AndroidLocation::jGetBearingMethod = 0;
 jmethodID AndroidLocation::jGetSpeedMethod = 0;
 jmethodID AndroidLocation::jGetTimeMethod = 0;
 jclass AndroidLayerRendererFrame::jLayerRendererFrameClass = 0;
 jmethodID AndroidLayerRendererFrame::jBeginDrawingMethod = 0;
 jmethodID AndroidLayerRendererFrame::jDrawBackgroundMethod = 0;
 jmethodID AndroidLayerRendererFrame::jDrawForegroundMethod = 0;
 jmethodID AndroidLayerRendererFrame::jEndDrawingMethod = 0;
 RefCountedJavaObject::~RefCountedJavaObject() {
     if (mObject)
         GetJNIForThread()->DeleteGlobalRef(mObject);
     mObject = nullptr;
 }
 void
 mozilla::InitAndroidJavaWrappers(JNIEnv *jEnv)
 {
     AndroidGeckoEvent::InitGeckoEventClass(jEnv);
     AndroidPoint::InitPointClass(jEnv);
     AndroidLocation::InitLocationClass(jEnv);
     AndroidRect::InitRectClass(jEnv);
     AndroidRectF::InitRectFClass(jEnv);
     AndroidLayerRendererFrame::InitLayerRendererFrameClass(jEnv);
     InitStubs(jEnv);
 }
 void
 AndroidGeckoEvent::InitGeckoEventClass(JNIEnv *jEnv)
 {
     initInit();
     jGeckoEventClass = getClassGlobalRef("org/mozilla/gecko/GeckoEvent");
     jActionField = getField("mAction", "I");
     jTypeField = getField("mType", "I");
     jAckNeededField = getField("mAckNeeded", "Z");
     jTimeField = getField("mTime", "J");
     jPoints = getField("mPoints", "[Landroid/graphics/Point;");
     jPointIndicies = getField("mPointIndicies", "[I");
     jOrientations = getField("mOrientations", "[F");
     jPressures = getField("mPressures", "[F");
     jPointRadii = getField("mPointRadii", "[Landroid/graphics/Point;");
     jXField = getField("mX", "D");
     jYField = getField("mY", "D");
     jZField = getField("mZ", "D");
     jRectField = getField("mRect", "Landroid/graphics/Rect;");
     jCharactersField = getField("mCharacters", "Ljava/lang/String;");
     jCharactersExtraField = getField("mCharactersExtra", "Ljava/lang/String;");
     jDataField = getField("mData", "Ljava/lang/String;");
     jKeyCodeField = getField("mKeyCode", "I");
     jMetaStateField = getField("mMetaState", "I");
     jDomKeyLocationField = getField("mDomKeyLocation", "Lorg/mozilla/gecko/GeckoEvent$DomKeyLocation;");
     jFlagsField = getField("mFlags", "I");
     jUnicodeCharField = getField("mUnicodeChar", "I");
     jBaseUnicodeCharField = getField("mBaseUnicodeChar", "I");
     jDOMPrintableKeyValueField = getField("mDOMPrintableKeyValue", "I");
     jRepeatCountField = getField("mRepeatCount", "I");
     jCountField = getField("mCount", "I");
     jStartField = getField("mStart", "I");
     jEndField = getField("mEnd", "I");
     jPointerIndexField = getField("mPointerIndex", "I");
     jRangeTypeField = getField("mRangeType", "I");
     jRangeStylesField = getField("mRangeStyles", "I");
     jRangeLineStyleField = getField("mRangeLineStyle", "I");
     jRangeBoldLineField = getField("mRangeBoldLine", "Z");
     jRangeForeColorField = getField("mRangeForeColor", "I");
     jRangeBackColorField = getField("mRangeBackColor", "I");
     jRangeLineColorField = getField("mRangeLineColor", "I");
     jLocationField = getField("mLocation", "Landroid/location/Location;");
     jConnectionTypeField = getField("mConnectionType", "I");
     jIsWifiField = getField("mIsWifi", "Z");
     jDHCPGatewayField = getField("mDHCPGateway", "I");
     jScreenOrientationField = getField("mScreenOrientation", "S");
     jByteBufferField = getField("mBuffer", "Ljava/nio/ByteBuffer;");
     jWidthField = getField("mWidth", "I");
     jHeightField = getField("mHeight", "I");
     jPrefNamesField = getField("mPrefNames", "[Ljava/lang/String;");
     // Init GeckoEvent.DomKeyLocation enum
     jDomKeyLocationClass = getClassGlobalRef("org/mozilla/gecko/GeckoEvent$DomKeyLocation");
     jDomKeyLocationValueField = getField("value", "I");
 }
 void
 AndroidLocation::InitLocationClass(JNIEnv *jEnv)
 {
     initInit();
     jLocationClass = getClassGlobalRef("android/location/Location");
     jGetLatitudeMethod = getMethod("getLatitude", "()D");
     jGetLongitudeMethod = getMethod("getLongitude", "()D");
     jGetAltitudeMethod = getMethod("getAltitude", "()D");
     jGetAccuracyMethod = getMethod("getAccuracy", "()F");
     jGetBearingMethod = getMethod("getBearing", "()F");
     jGetSpeedMethod = getMethod("getSpeed", "()F");
     jGetTimeMethod = getMethod("getTime", "()J");
 }
 nsGeoPosition*
 AndroidLocation::CreateGeoPosition(JNIEnv *jenv, jobject jobj)
 {
     AutoLocalJNIFrame jniFrame(jenv);
     double latitude  = jenv->CallDoubleMethod(jobj, jGetLatitudeMethod);
     if (jniFrame.CheckForException()) return nullptr;
     double longitude = jenv->CallDoubleMethod(jobj, jGetLongitudeMethod);
     if (jniFrame.CheckForException()) return nullptr;
     double altitude  = jenv->CallDoubleMethod(jobj, jGetAltitudeMethod);
     if (jniFrame.CheckForException()) return nullptr;
     float  accuracy  = jenv->CallFloatMethod (jobj, jGetAccuracyMethod);
     if (jniFrame.CheckForException()) return nullptr;
     float  bearing   = jenv->CallFloatMethod (jobj, jGetBearingMethod);
     if (jniFrame.CheckForException()) return nullptr;
     float  speed     = jenv->CallFloatMethod (jobj, jGetSpeedMethod);
     if (jniFrame.CheckForException()) return nullptr;
     long long time   = jenv->CallLongMethod  (jobj, jGetTimeMethod);
     if (jniFrame.CheckForException()) return nullptr;
     return new nsGeoPosition(latitude, longitude,
                              altitude, accuracy,
                              accuracy, bearing,
                              speed,    time);
 }
 void
 AndroidPoint::InitPointClass(JNIEnv *jEnv)
 {
     initInit();
     jPointClass = getClassGlobalRef("android/graphics/Point");
     jXField = getField("x", "I");
     jYField = getField("y", "I");
 }
 void
 AndroidRect::InitRectClass(JNIEnv *jEnv)
 {
     initInit();
     jRectClass = getClassGlobalRef("android/graphics/Rect");
     jBottomField = getField("bottom", "I");
     jLeftField = getField("left", "I");
     jTopField = getField("top", "I");
     jRightField = getField("right", "I");
 }
 void
 AndroidRectF::InitRectFClass(JNIEnv *jEnv)
 {
     initInit();
     jRectClass = getClassGlobalRef("android/graphics/RectF");
     jBottomField = getField("bottom", "F");
     jLeftField = getField("left", "F");
     jTopField = getField("top", "F");
     jRightField = getField("right", "F");
 }
 void
 AndroidLayerRendererFrame::InitLayerRendererFrameClass(JNIEnv *jEnv)
 {
     initInit();
     jLayerRendererFrameClass = getClassGlobalRef("org/mozilla/gecko/gfx/LayerRenderer$Frame");
     jBeginDrawingMethod = getMethod("beginDrawing", "()V");
     jDrawBackgroundMethod = getMethod("drawBackground", "()V");
     jDrawForegroundMethod = getMethod("drawForeground", "()V");
     jEndDrawingMethod = getMethod("endDrawing", "()V");
 }
 #undef initInit
 #undef initClassGlobalRef
 #undef getField
 #undef getMethod
 void
 AndroidGeckoEvent::ReadPointArray(nsTArray<nsIntPoint> &points,
                                   JNIEnv *jenv,
                                   jfieldID field,
                                   int32_t count)
 {
     jobjectArray jObjArray = (jobjectArray)jenv->GetObjectField(wrapped_obj, field);
     for (int32_t i = 0; i < count; i++) {
         jobject jObj = jenv->GetObjectArrayElement(jObjArray, i);
         AndroidPoint jpoint(jenv, jObj);
         nsIntPoint p(jpoint.X(), jpoint.Y());
         points.AppendElement(p);
     }
 }
 void
 AndroidGeckoEvent::ReadIntArray(nsTArray<int> &aVals,
                                 JNIEnv *jenv,
                                 jfieldID field,
                                 int32_t count)
 {
     jintArray jIntArray = (jintArray)jenv->GetObjectField(wrapped_obj, field);
     jint *vals = jenv->GetIntArrayElements(jIntArray, nullptr);
     for (int32_t i = 0; i < count; i++) {
         aVals.AppendElement(vals[i]);
     }
     jenv->ReleaseIntArrayElements(jIntArray, vals, JNI_ABORT);
 }
 void
 AndroidGeckoEvent::ReadFloatArray(nsTArray<float> &aVals,
                                   JNIEnv *jenv,
                                   jfieldID field,
                                   int32_t count)
 {
     jfloatArray jFloatArray = (jfloatArray)jenv->GetObjectField(wrapped_obj, field);
     jfloat *vals = jenv->GetFloatArrayElements(jFloatArray, nullptr);
     for (int32_t i = 0; i < count; i++) {
         aVals.AppendElement(vals[i]);
     }
     jenv->ReleaseFloatArrayElements(jFloatArray, vals, JNI_ABORT);
 }
 void
 AndroidGeckoEvent::ReadStringArray(nsTArray<nsString> &array,
                                    JNIEnv *jenv,
                                    jfieldID field)
 {
     jarray jArray = (jarray)jenv->GetObjectField(wrapped_obj, field);
     jsize length = jenv->GetArrayLength(jArray);
     jobjectArray jStringArray = (jobjectArray)jArray;
     nsString *strings = array.AppendElements(length);
     for (jsize i = 0; i < length; ++i) {
         jstring javastring = (jstring) jenv->GetObjectArrayElement(jStringArray, i);
         ReadStringFromJString(strings[i], jenv, javastring);
     }
 }
 void
 AndroidGeckoEvent::ReadRectField(JNIEnv *jenv)
 {
     AndroidRect r(jenv, jenv->GetObjectField(wrappedObject(), jRectField));
     if (!r.isNull()) {
         mRect.SetRect(r.Left(),
                       r.Top(),
                       r.Width(),
                       r.Height());
     } else {
         mRect.SetEmpty();
     }
 }
 void
 AndroidGeckoEvent::ReadStringFromJString(nsString &aString, JNIEnv *jenv,
                                          jstring s)
 {
     if (!s) {
         aString.SetIsVoid(true);
         return;
     }
     int len = jenv->GetStringLength(s);
     aString.SetLength(len);
     jenv->GetStringRegion(s, 0, len, reinterpret_cast<jchar*>(aString.BeginWriting()));
 }
 void
 AndroidGeckoEvent::ReadCharactersField(JNIEnv *jenv)
 {
     jstring s = (jstring) jenv->GetObjectField(wrapped_obj, jCharactersField);
     ReadStringFromJString(mCharacters, jenv, s);
 }
 void
 AndroidGeckoEvent::ReadCharactersExtraField(JNIEnv *jenv)
 {
     jstring s = (jstring) jenv->GetObjectField(wrapped_obj, jCharactersExtraField);
     ReadStringFromJString(mCharactersExtra, jenv, s);
 }
 void
 AndroidGeckoEvent::ReadDataField(JNIEnv *jenv)
 {
     jstring s = (jstring) jenv->GetObjectField(wrapped_obj, jDataField);
     ReadStringFromJString(mData, jenv, s);
 }
 void
 AndroidGeckoEvent::UnionRect(nsIntRect const& aRect)
 {
     mRect = aRect.Union(mRect);
 }
 uint32_t
 AndroidGeckoEvent::ReadDomKeyLocation(JNIEnv* jenv, jobject jGeckoEventObj)
 {
     jobject enumObject = jenv->GetObjectField(jGeckoEventObj,
                                              jDomKeyLocationField);
     MOZ_ASSERT(enumObject);
     int enumValue = jenv->GetIntField(enumObject, jDomKeyLocationValueField);
     MOZ_ASSERT(enumValue >= nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD &&
                enumValue <= nsIDOMKeyEvent::DOM_KEY_LOCATION_JOYSTICK);
     return static_cast<uint32_t>(enumValue);
 }
 void
 AndroidGeckoEvent::Init(JNIEnv *jenv, jobject jobj)
 {
     NS_ASSERTION(!wrapped_obj, "Init called on non-null wrapped_obj!");
     wrapped_obj = jobj;
     if (!jobj)
         return;
     mAction = jenv->GetIntField(jobj, jActionField);
     mType = jenv->GetIntField(jobj, jTypeField);
     mAckNeeded = jenv->GetBooleanField(jobj, jAckNeededField);
     switch (mType) {
         case SIZE_CHANGED:
             ReadPointArray(mPoints, jenv, jPoints, 2);
             break;
         case KEY_EVENT:
         case IME_KEY_EVENT:
             mTime = jenv->GetLongField(jobj, jTimeField);
             mMetaState = jenv->GetIntField(jobj, jMetaStateField);
             mDomKeyLocation = ReadDomKeyLocation(jenv, jobj);
             mFlags = jenv->GetIntField(jobj, jFlagsField);
             mKeyCode = jenv->GetIntField(jobj, jKeyCodeField);
             mUnicodeChar = jenv->GetIntField(jobj, jUnicodeCharField);
             mBaseUnicodeChar = jenv->GetIntField(jobj, jBaseUnicodeCharField);
             mDOMPrintableKeyValue =
                 jenv->GetIntField(jobj, jDOMPrintableKeyValueField);
             mRepeatCount = jenv->GetIntField(jobj, jRepeatCountField);
             ReadCharactersField(jenv);
             break;
         case NATIVE_GESTURE_EVENT:
             mTime = jenv->GetLongField(jobj, jTimeField);
             mMetaState = jenv->GetIntField(jobj, jMetaStateField);
             mCount = jenv->GetIntField(jobj, jCountField);
             ReadPointArray(mPoints, jenv, jPoints, mCount);
             mX = jenv->GetDoubleField(jobj, jXField);
             break;
         case MOTION_EVENT:
             mTime = jenv->GetLongField(jobj, jTimeField);
             mMetaState = jenv->GetIntField(jobj, jMetaStateField);
             mCount = jenv->GetIntField(jobj, jCountField);
             mPointerIndex = jenv->GetIntField(jobj, jPointerIndexField);
             ReadPointArray(mPointRadii, jenv, jPointRadii, mCount);
             ReadFloatArray(mOrientations, jenv, jOrientations, mCount);
             ReadFloatArray(mPressures, jenv, jPressures, mCount);
             ReadPointArray(mPoints, jenv, jPoints, mCount);
             ReadIntArray(mPointIndicies, jenv, jPointIndicies, mCount);
             break;
         case IME_EVENT:
             mStart = jenv->GetIntField(jobj, jStartField);
             mEnd = jenv->GetIntField(jobj, jEndField);
             if (mAction == IME_REPLACE_TEXT) {
                 ReadCharactersField(jenv);
             } else if (mAction == IME_UPDATE_COMPOSITION ||
                     mAction == IME_ADD_COMPOSITION_RANGE) {
                 mRangeType = jenv->GetIntField(jobj, jRangeTypeField);
                 mRangeStyles = jenv->GetIntField(jobj, jRangeStylesField);
                 mRangeLineStyle =
                     jenv->GetIntField(jobj, jRangeLineStyleField);
                 mRangeBoldLine =
                     jenv->GetBooleanField(jobj, jRangeBoldLineField);
                 mRangeForeColor =
                     jenv->GetIntField(jobj, jRangeForeColorField);
                 mRangeBackColor =
                     jenv->GetIntField(jobj, jRangeBackColorField);
                 mRangeLineColor =
                     jenv->GetIntField(jobj, jRangeLineColorField);
             }
             break;
         case DRAW:
             ReadRectField(jenv);
             break;
         case SENSOR_EVENT:
              mX = jenv->GetDoubleField(jobj, jXField);
              mY = jenv->GetDoubleField(jobj, jYField);
              mZ = jenv->GetDoubleField(jobj, jZField);
              mFlags = jenv->GetIntField(jobj, jFlagsField);
              mMetaState = jenv->GetIntField(jobj, jMetaStateField);
              break;
         case LOCATION_EVENT: {
             jobject location = jenv->GetObjectField(jobj, jLocationField);
             mGeoPosition = AndroidLocation::CreateGeoPosition(jenv, location);
             break;
         }
         case LOAD_URI: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             break;
         }
         case VIEWPORT:
         case BROADCAST: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             break;
         }
         case NETWORK_CHANGED: {
             mConnectionType = jenv->GetIntField(jobj, jConnectionTypeField);
             mIsWifi = jenv->GetBooleanField(jobj, jIsWifiField);
             mDHCPGateway = jenv->GetIntField(jobj, jDHCPGatewayField);
             break;
         }
         case VISITED: {
             ReadCharactersField(jenv);
             break;
         }
         case THUMBNAIL: {
             mMetaState = jenv->GetIntField(jobj, jMetaStateField);
             ReadPointArray(mPoints, jenv, jPoints, 1);
             mByteBuffer = new RefCountedJavaObject(jenv, jenv->GetObjectField(jobj, jByteBufferField));
             break;
         }
         case SCREENORIENTATION_CHANGED: {
             mScreenOrientation = jenv->GetShortField(jobj, jScreenOrientationField);
             break;
         }
         case COMPOSITOR_CREATE: {
             mWidth = jenv->GetIntField(jobj, jWidthField);
             mHeight = jenv->GetIntField(jobj, jHeightField);
             break;
         }
         case CALL_OBSERVER: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             ReadDataField(jenv);
             break;
         }
         case REMOVE_OBSERVER: {
             ReadCharactersField(jenv);
             break;
         }
         case LOW_MEMORY: {
             mMetaState = jenv->GetIntField(jobj, jMetaStateField);
             break;
         }
         case NETWORK_LINK_CHANGE: {
             ReadCharactersField(jenv);
             break;
         }
         case TELEMETRY_HISTOGRAM_ADD: {
             ReadCharactersField(jenv);
             mCount = jenv->GetIntField(jobj, jCountField);
             break;
         }
         case TELEMETRY_UI_SESSION_START: {
             ReadCharactersField(jenv);
             mTime = jenv->GetLongField(jobj, jTimeField);
             break;
         }
         case TELEMETRY_UI_SESSION_STOP: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             mTime = jenv->GetLongField(jobj, jTimeField);
             break;
         }
         case TELEMETRY_UI_EVENT: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             ReadDataField(jenv);
             mTime = jenv->GetLongField(jobj, jTimeField);
             break;
         }
         case PREFERENCES_OBSERVE:
         case PREFERENCES_GET: {
             ReadStringArray(mPrefNames, jenv, jPrefNamesField);
             mCount = jenv->GetIntField(jobj, jCountField);
             break;
         }
         case PREFERENCES_REMOVE_OBSERVERS: {
             mCount = jenv->GetIntField(jobj, jCountField);
             break;
         }
         default:
             break;
     }
 #ifdef DEBUG_ANDROID_EVENTS
     ALOG("AndroidGeckoEvent: %p : %d", (void*)jobj, mType);
 #endif
 }
 void
 AndroidGeckoEvent::Init(int aType)
 {
     mType = aType;
     mAckNeeded = false;
 }
 void
 AndroidGeckoEvent::Init(AndroidGeckoEvent *aResizeEvent)
 {
     NS_ASSERTION(aResizeEvent->Type() == SIZE_CHANGED, "Init called on non-SIZE_CHANGED event");
     mType = FORCED_RESIZE;
     mAckNeeded = false;
     mTime = aResizeEvent->mTime;
     mPoints = aResizeEvent->mPoints; // x,y coordinates
 }
 WidgetTouchEvent
 AndroidGeckoEvent::MakeTouchEvent(nsIWidget* widget)
 {
     int type = NS_EVENT_NULL;
     int startIndex = 0;
     int endIndex = Count();
     switch (Action()) {
         case AndroidMotionEvent::ACTION_DOWN:
         case AndroidMotionEvent::ACTION_POINTER_DOWN: {
             type = NS_TOUCH_START;
             break;
         }
         case AndroidMotionEvent::ACTION_MOVE: {
             type = NS_TOUCH_MOVE;
             break;
         }
         case AndroidMotionEvent::ACTION_UP:
         case AndroidMotionEvent::ACTION_POINTER_UP: {
             type = NS_TOUCH_END;
             // for pointer-up events we only want the data from
             // the one pointer that went up
             startIndex = PointerIndex();
             endIndex = startIndex + 1;
             break;
         }
         case AndroidMotionEvent::ACTION_OUTSIDE:
         case AndroidMotionEvent::ACTION_CANCEL: {
             type = NS_TOUCH_CANCEL;
             break;
         }
     }
     WidgetTouchEvent event(true, type, widget);
     if (type == NS_EVENT_NULL) {
         // An event we don't know about
         return event;
     }
     event.modifiers = DOMModifiers();
     event.time = Time();
     const nsIntPoint& offset = widget->WidgetToScreenOffset();
     event.touches.SetCapacity(endIndex - startIndex);
     for (int i = startIndex; i < endIndex; i++) {
         // In this code branch, we are dispatching this event directly
         // into Gecko (as opposed to going through the AsyncPanZoomController),
         // and the Points() array has points in CSS pixels, which we need
         // to convert.
         CSSToLayoutDeviceScale scale = widget->GetDefaultScale();
         nsIntPoint pt(
             (Points()[i].x * scale.scale) - offset.x,
             (Points()[i].y * scale.scale) - offset.y);
         nsIntPoint radii(
             PointRadii()[i].x * scale.scale,
             PointRadii()[i].y * scale.scale);
         nsRefPtr<Touch> t = new Touch(PointIndicies()[i],
                                       pt,
                                       radii,
                                       Orientations()[i],
                                       Pressures()[i]);
         event.touches.AppendElement(t);
     }
     return event;
 }
 MultiTouchInput
 AndroidGeckoEvent::MakeMultiTouchInput(nsIWidget* widget)
 {
     MultiTouchInput::MultiTouchType type = (MultiTouchInput::MultiTouchType)-1;
     int startIndex = 0;
     int endIndex = Count();
     switch (Action()) {
         case AndroidMotionEvent::ACTION_DOWN:
         case AndroidMotionEvent::ACTION_POINTER_DOWN: {
             type = MultiTouchInput::MULTITOUCH_START;
             break;
         }
         case AndroidMotionEvent::ACTION_MOVE: {
             type = MultiTouchInput::MULTITOUCH_MOVE;
             break;
         }
         case AndroidMotionEvent::ACTION_UP:
         case AndroidMotionEvent::ACTION_POINTER_UP: {
             // for pointer-up events we only want the data from
             // the one pointer that went up
             startIndex = PointerIndex();
             endIndex = startIndex + 1;
             type = MultiTouchInput::MULTITOUCH_END;
             break;
         }
         case AndroidMotionEvent::ACTION_OUTSIDE:
         case AndroidMotionEvent::ACTION_CANCEL: {
             type = MultiTouchInput::MULTITOUCH_CANCEL;
             break;
         }
     }
     MultiTouchInput event(type, Time(), 0);
     event.modifiers = DOMModifiers();
     if (type < 0) {
         // An event we don't know about
         return event;
     }
     const nsIntPoint& offset = widget->WidgetToScreenOffset();
     event.mTouches.SetCapacity(endIndex - startIndex);
     for (int i = startIndex; i < endIndex; i++) {
         nsIntPoint point = Points()[i] - offset;
         nsIntPoint radius = PointRadii()[i];
         SingleTouchData data(PointIndicies()[i],
                              ScreenIntPoint::FromUnknownPoint(
                                gfx::IntPoint(point.x, point.y)),
                              ScreenSize::FromUnknownSize(
                                gfx::Size(radius.x, radius.y)),
                              Orientations()[i],
                              Pressures()[i]);
         event.mTouches.AppendElement(data);
     }
     return event;
 }
 WidgetMouseEvent
 AndroidGeckoEvent::MakeMouseEvent(nsIWidget* widget)
 {
     uint32_t msg = NS_EVENT_NULL;
     if (Points().Length() > 0) {
         switch (Action()) {
             case AndroidMotionEvent::ACTION_HOVER_MOVE:
                 msg = NS_MOUSE_MOVE;
                 break;
             case AndroidMotionEvent::ACTION_HOVER_ENTER:
                 msg = NS_MOUSEENTER;
                 break;
             case AndroidMotionEvent::ACTION_HOVER_EXIT:
                 msg = NS_MOUSELEAVE;
                 break;
             default:
                 break;
         }
     }
     WidgetMouseEvent event(true, msg, widget,
                            WidgetMouseEvent::eReal, WidgetMouseEvent::eNormal);
     if (msg == NS_EVENT_NULL) {
         // unknown type, or no point data. abort
         return event;
     }
     // XXX can we synthesize different buttons?
     event.button = WidgetMouseEvent::eLeftButton;
     if (msg != NS_MOUSE_MOVE) {
         event.clickCount = 1;
     }
     event.modifiers = DOMModifiers();
     event.time = Time();
     // We are dispatching this event directly into Gecko (as opposed to going
     // through the AsyncPanZoomController), and the Points() array has points
     // in CSS pixels, which we need to convert to LayoutDevice pixels.
     const nsIntPoint& offset = widget->WidgetToScreenOffset();
     CSSToLayoutDeviceScale scale = widget->GetDefaultScale();
     event.refPoint = LayoutDeviceIntPoint((Points()[0].x * scale.scale) - offset.x,
                                           (Points()[0].y * scale.scale) - offset.y);
     return event;
 }
 Modifiers
 AndroidGeckoEvent::DOMModifiers() const
 {
     Modifiers result = 0;
     if (mMetaState & AMETA_ALT_MASK) {
         result |= MODIFIER_ALT;
     }
     if (mMetaState & AMETA_SHIFT_MASK) {
         result |= MODIFIER_SHIFT;
     }
     if (mMetaState & AMETA_CTRL_MASK) {
         result |= MODIFIER_CONTROL;
     }
     if (mMetaState & AMETA_META_MASK) {
         result |= MODIFIER_META;
     }
     if (mMetaState & AMETA_FUNCTION_ON) {
         result |= MODIFIER_FN;
     }
     if (mMetaState & AMETA_CAPS_LOCK_ON) {
         result |= MODIFIER_CAPSLOCK;
     }
     if (mMetaState & AMETA_NUM_LOCK_ON) {
         result |= MODIFIER_NUMLOCK;
     }
     if (mMetaState & AMETA_SCROLL_LOCK_ON) {
         result |= MODIFIER_SCROLLLOCK;
     }
     return result;
 }
 void
 AndroidPoint::Init(JNIEnv *jenv, jobject jobj)
 {
     if (jobj) {
         mX = jenv->GetIntField(jobj, jXField);
         mY = jenv->GetIntField(jobj, jYField);
     } else {
         mX = 0;
         mY = 0;
     }
 }
 void
 AndroidLayerRendererFrame::Init(JNIEnv *env, jobject jobj)
 {
     if (!isNull()) {
         Dispose(env);
     }
     wrapped_obj = env->NewGlobalRef(jobj);
 }
 void
 AndroidLayerRendererFrame::Dispose(JNIEnv *env)
 {
     if (isNull()) {
         return;
     }
     env->DeleteGlobalRef(wrapped_obj);
     wrapped_obj = 0;
 }
 NS_IMPL_ISUPPORTS(nsAndroidDisplayport, nsIAndroidDisplayport)
 bool
 AndroidLayerRendererFrame::BeginDrawing(AutoLocalJNIFrame *jniFrame)
 {
     if (!jniFrame || !jniFrame->GetEnv())
         return false;
     jniFrame->GetEnv()->CallVoidMethod(wrapped_obj, jBeginDrawingMethod);
     if (jniFrame->CheckForException())
         return false;
     return true;
 }
 bool
 AndroidLayerRendererFrame::DrawBackground(AutoLocalJNIFrame *jniFrame)
 {
     if (!jniFrame || !jniFrame->GetEnv())
         return false;
     jniFrame->GetEnv()->CallVoidMethod(wrapped_obj, jDrawBackgroundMethod);
     if (jniFrame->CheckForException())
         return false;
     return true;
 }
 bool
 AndroidLayerRendererFrame::DrawForeground(AutoLocalJNIFrame *jniFrame)
 {
     if (!jniFrame || !jniFrame->GetEnv())
         return false;
     jniFrame->GetEnv()->CallVoidMethod(wrapped_obj, jDrawForegroundMethod);
     if (jniFrame->CheckForException())
         return false;
     return true;
 }
 bool
 AndroidLayerRendererFrame::EndDrawing(AutoLocalJNIFrame *jniFrame)
 {
     if (!jniFrame || !jniFrame->GetEnv())
         return false;
     jniFrame->GetEnv()->CallVoidMethod(wrapped_obj, jEndDrawingMethod);
     if (jniFrame->CheckForException())
         return false;
     return true;
 }
 void
 AndroidRect::Init(JNIEnv *jenv, jobject jobj)
 {
     NS_ASSERTION(wrapped_obj == nullptr, "Init called on non-null wrapped_obj!");
     wrapped_obj = jobj;
     if (jobj) {
         mTop = jenv->GetIntField(jobj, jTopField);
         mLeft = jenv->GetIntField(jobj, jLeftField);
         mRight = jenv->GetIntField(jobj, jRightField);
         mBottom = jenv->GetIntField(jobj, jBottomField);
     } else {
         mTop = 0;
         mLeft = 0;
         mRight = 0;
         mBottom = 0;
     }
 }
 void
 AndroidRectF::Init(JNIEnv *jenv, jobject jobj)
 {
     NS_ASSERTION(wrapped_obj == nullptr, "Init called on non-null wrapped_obj!");
     wrapped_obj = jobj;
     if (jobj) {
         mTop = jenv->GetFloatField(jobj, jTopField);
         mLeft = jenv->GetFloatField(jobj, jLeftField);
         mRight = jenv->GetFloatField(jobj, jRightField);
         mBottom = jenv->GetFloatField(jobj, jBottomField);
     } else {
         mTop = 0;
         mLeft = 0;
         mRight = 0;
         mBottom = 0;
     }
 }
 nsJNIString::nsJNIString(jstring jstr, JNIEnv *jenv)
 {
     if (!jstr) {
         SetIsVoid(true);
         return;
     }
     JNIEnv *jni = jenv;
     if (!jni) {
         jni = AndroidBridge::GetJNIEnv();
     }
     const jchar* jCharPtr = jni->GetStringChars(jstr, nullptr);
     if (!jCharPtr) {
         SetIsVoid(true);
         return;
     }
     jsize len = jni->GetStringLength(jstr);
     if (len <= 0) {
         SetIsVoid(true);
     } else {
         Assign(reinterpret_cast<const char16_t*>(jCharPtr), len);
     }
     jni->ReleaseStringChars(jstr, jCharPtr);
 }

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widget/android/AndroidJavaWrappers.cpp