gecko-dev/widget/android/AndroidJavaWrappers.h

/* -*- 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/. */

#ifndef AndroidJavaWrappers_h__
#define AndroidJavaWrappers_h__

#include <jni.h>
#include <android/input.h>
#include <android/log.h>
#include <android/api-level.h>

#include "nsGeoPosition.h"
#include "nsRect.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsIObserver.h"
#include "nsIAndroidBridge.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/dom/Touch.h"
#include "mozilla/EventForwards.h"
#include "InputData.h"
#include "Units.h"
#include "FrameMetrics.h"

//#define FORCE_ALOG 1

class nsIAndroidDisplayport;
class nsIWidget;

namespace mozilla {

class AutoLocalJNIFrame;

void InitAndroidJavaWrappers(JNIEnv *jEnv);

class RefCountedJavaObject {
public:
    RefCountedJavaObject(JNIEnv* env, jobject obj) : mRefCnt(0), mObject(env->NewGlobalRef(obj)) {}

    ~RefCountedJavaObject();

    int32_t AddRef() { return ++mRefCnt; }

    int32_t Release() {
        int32_t refcnt = --mRefCnt;
        if (refcnt == 0)
            delete this;
        return refcnt;
    }

    jobject GetObject() { return mObject; }
private:
    int32_t mRefCnt;
    jobject mObject;
};

/*
 * Note: do not store global refs to any WrappedJavaObject;
 * these are live only during a particular JNI method, as
 * NewGlobalRef is -not- called on the jobject.
 *
 * If this is needed, WrappedJavaObject can be extended to
 * handle it.
 */
class WrappedJavaObject {
public:
    WrappedJavaObject() :
        wrapped_obj(nullptr)
    { }

    WrappedJavaObject(jobject jobj) : wrapped_obj(nullptr) {
        Init(jobj);
    }

    void Init(jobject jobj) {
        wrapped_obj = jobj;
    }

    bool isNull() const {
        return wrapped_obj == nullptr;
    }

    jobject wrappedObject() const {
        return wrapped_obj;
    }

protected:
    jobject wrapped_obj;
};

class AutoGlobalWrappedJavaObject : protected WrappedJavaObject{
public:
    AutoGlobalWrappedJavaObject() :
        wrapped_obj(nullptr)
    { }

    AutoGlobalWrappedJavaObject(jobject jobj, JNIEnv* env) : wrapped_obj(nullptr) {
        Init(jobj, env);
    }

    virtual ~AutoGlobalWrappedJavaObject();
    void Dispose();

    void Init(jobject jobj, JNIEnv* env) {
        if (!isNull()) {
            env->DeleteGlobalRef(wrapped_obj);
        }
        wrapped_obj = env->NewGlobalRef(jobj);
    }

    bool isNull() const {
        return wrapped_obj == nullptr;
    }

    jobject wrappedObject() const {
        return wrapped_obj;
    }

protected:
    jobject wrapped_obj;
};

class AndroidPoint : public WrappedJavaObject
{
public:
    static void InitPointClass(JNIEnv *jEnv);

    AndroidPoint() { }
    AndroidPoint(JNIEnv *jenv, jobject jobj) {
        Init(jenv, jobj);
    }

    void Init(JNIEnv *jenv, jobject jobj);

    int X() { return mX; }
    int Y() { return mY; }

protected:
    int mX;
    int mY;

    static jclass jPointClass;
    static jfieldID jXField;
    static jfieldID jYField;
};

class AndroidRect : public WrappedJavaObject
{
public:
    static void InitRectClass(JNIEnv *jEnv);

    AndroidRect() { }
    AndroidRect(JNIEnv *jenv, jobject jobj) {
        Init(jenv, jobj);
    }

    void Init(JNIEnv *jenv, jobject jobj);

    int Bottom() { return mBottom; }
    int Left() { return mLeft; }
    int Right() { return mRight; }
    int Top() { return mTop; }
    int Width() { return mRight - mLeft; }
    int Height() { return mBottom - mTop; }

protected:
    int mBottom;
    int mLeft;
    int mRight;
    int mTop;

    static jclass jRectClass;
    static jfieldID jBottomField;
    static jfieldID jLeftField;
    static jfieldID jRightField;
    static jfieldID jTopField;
};

class AndroidRectF : public WrappedJavaObject
{
public:
    static void InitRectFClass(JNIEnv *jEnv);

    AndroidRectF() { }
    AndroidRectF(JNIEnv *jenv, jobject jobj) {
        Init(jenv, jobj);
    }

    void Init(JNIEnv *jenv, jobject jobj);

    float Bottom() { return mBottom; }
    float Left() { return mLeft; }
    float Right() { return mRight; }
    float Top() { return mTop; }
    float Width() { return mRight - mLeft; }
    float Height() { return mBottom - mTop; }

protected:
    float mBottom;
    float mLeft;
    float mRight;
    float mTop;

    static jclass jRectClass;
    static jfieldID jBottomField;
    static jfieldID jLeftField;
    static jfieldID jRightField;
    static jfieldID jTopField;
};

enum {
    // These keycode masks are not defined in android/keycodes.h:
#if __ANDROID_API__ < 13
    AKEYCODE_ESCAPE             = 111,
    AKEYCODE_FORWARD_DEL        = 112,
    AKEYCODE_CTRL_LEFT          = 113,
    AKEYCODE_CTRL_RIGHT         = 114,
    AKEYCODE_CAPS_LOCK          = 115,
    AKEYCODE_SCROLL_LOCK        = 116,
    AKEYCODE_META_LEFT          = 117,
    AKEYCODE_META_RIGHT         = 118,
    AKEYCODE_FUNCTION           = 119,
    AKEYCODE_SYSRQ              = 120,
    AKEYCODE_BREAK              = 121,
    AKEYCODE_MOVE_HOME          = 122,
    AKEYCODE_MOVE_END           = 123,
    AKEYCODE_INSERT             = 124,
    AKEYCODE_FORWARD            = 125,
    AKEYCODE_MEDIA_PLAY         = 126,
    AKEYCODE_MEDIA_PAUSE        = 127,
    AKEYCODE_MEDIA_CLOSE        = 128,
    AKEYCODE_MEDIA_EJECT        = 129,
    AKEYCODE_MEDIA_RECORD       = 130,
    AKEYCODE_F1                 = 131,
    AKEYCODE_F2                 = 132,
    AKEYCODE_F3                 = 133,
    AKEYCODE_F4                 = 134,
    AKEYCODE_F5                 = 135,
    AKEYCODE_F6                 = 136,
    AKEYCODE_F7                 = 137,
    AKEYCODE_F8                 = 138,
    AKEYCODE_F9                 = 139,
    AKEYCODE_F10                = 140,
    AKEYCODE_F11                = 141,
    AKEYCODE_F12                = 142,
    AKEYCODE_NUM_LOCK           = 143,
    AKEYCODE_NUMPAD_0           = 144,
    AKEYCODE_NUMPAD_1           = 145,
    AKEYCODE_NUMPAD_2           = 146,
    AKEYCODE_NUMPAD_3           = 147,
    AKEYCODE_NUMPAD_4           = 148,
    AKEYCODE_NUMPAD_5           = 149,
    AKEYCODE_NUMPAD_6           = 150,
    AKEYCODE_NUMPAD_7           = 151,
    AKEYCODE_NUMPAD_8           = 152,
    AKEYCODE_NUMPAD_9           = 153,
    AKEYCODE_NUMPAD_DIVIDE      = 154,
    AKEYCODE_NUMPAD_MULTIPLY    = 155,
    AKEYCODE_NUMPAD_SUBTRACT    = 156,
    AKEYCODE_NUMPAD_ADD         = 157,
    AKEYCODE_NUMPAD_DOT         = 158,
    AKEYCODE_NUMPAD_COMMA       = 159,
    AKEYCODE_NUMPAD_ENTER       = 160,
    AKEYCODE_NUMPAD_EQUALS      = 161,
    AKEYCODE_NUMPAD_LEFT_PAREN  = 162,
    AKEYCODE_NUMPAD_RIGHT_PAREN = 163,
    AKEYCODE_VOLUME_MUTE        = 164,
    AKEYCODE_INFO               = 165,
    AKEYCODE_CHANNEL_UP         = 166,
    AKEYCODE_CHANNEL_DOWN       = 167,
    AKEYCODE_ZOOM_IN            = 168,
    AKEYCODE_ZOOM_OUT           = 169,
    AKEYCODE_TV                 = 170,
    AKEYCODE_WINDOW             = 171,
    AKEYCODE_GUIDE              = 172,
    AKEYCODE_DVR                = 173,
    AKEYCODE_BOOKMARK           = 174,
    AKEYCODE_CAPTIONS           = 175,
    AKEYCODE_SETTINGS           = 176,
    AKEYCODE_TV_POWER           = 177,
    AKEYCODE_TV_INPUT           = 178,
    AKEYCODE_STB_POWER          = 179,
    AKEYCODE_STB_INPUT          = 180,
    AKEYCODE_AVR_POWER          = 181,
    AKEYCODE_AVR_INPUT          = 182,
    AKEYCODE_PROG_RED           = 183,
    AKEYCODE_PROG_GREEN         = 184,
    AKEYCODE_PROG_YELLOW        = 185,
    AKEYCODE_PROG_BLUE          = 186,
    AKEYCODE_APP_SWITCH         = 187,
    AKEYCODE_BUTTON_1           = 188,
    AKEYCODE_BUTTON_2           = 189,
    AKEYCODE_BUTTON_3           = 190,
    AKEYCODE_BUTTON_4           = 191,
    AKEYCODE_BUTTON_5           = 192,
    AKEYCODE_BUTTON_6           = 193,
    AKEYCODE_BUTTON_7           = 194,
    AKEYCODE_BUTTON_8           = 195,
    AKEYCODE_BUTTON_9           = 196,
    AKEYCODE_BUTTON_10          = 197,
    AKEYCODE_BUTTON_11          = 198,
    AKEYCODE_BUTTON_12          = 199,
    AKEYCODE_BUTTON_13          = 200,
    AKEYCODE_BUTTON_14          = 201,
    AKEYCODE_BUTTON_15          = 202,
    AKEYCODE_BUTTON_16          = 203,
#endif
#if __ANDROID_API__ < 14
    AKEYCODE_LANGUAGE_SWITCH    = 204,
    AKEYCODE_MANNER_MODE        = 205,
    AKEYCODE_3D_MODE            = 206,
#endif
#if __ANDROID_API__ < 15
    AKEYCODE_CONTACTS           = 207,
    AKEYCODE_CALENDAR           = 208,
    AKEYCODE_MUSIC              = 209,
    AKEYCODE_CALCULATOR         = 210,
#endif
#if __ANDROID_API__ < 16
    AKEYCODE_ZENKAKU_HANKAKU    = 211,
    AKEYCODE_EISU               = 212,
    AKEYCODE_MUHENKAN           = 213,
    AKEYCODE_HENKAN             = 214,
    AKEYCODE_KATAKANA_HIRAGANA  = 215,
    AKEYCODE_YEN                = 216,
    AKEYCODE_RO                 = 217,
    AKEYCODE_KANA               = 218,
    AKEYCODE_ASSIST             = 219,
#endif

    AMETA_FUNCTION_ON           = 0x00000008,
    AMETA_CTRL_ON               = 0x00001000,
    AMETA_CTRL_LEFT_ON          = 0x00002000,
    AMETA_CTRL_RIGHT_ON         = 0x00004000,
    AMETA_META_ON               = 0x00010000,
    AMETA_META_LEFT_ON          = 0x00020000,
    AMETA_META_RIGHT_ON         = 0x00040000,
    AMETA_CAPS_LOCK_ON          = 0x00100000,
    AMETA_NUM_LOCK_ON           = 0x00200000,
    AMETA_SCROLL_LOCK_ON        = 0x00400000,

    AMETA_ALT_MASK              = AMETA_ALT_LEFT_ON   | AMETA_ALT_RIGHT_ON   | AMETA_ALT_ON,
    AMETA_CTRL_MASK             = AMETA_CTRL_LEFT_ON  | AMETA_CTRL_RIGHT_ON  | AMETA_CTRL_ON,
    AMETA_META_MASK             = AMETA_META_LEFT_ON  | AMETA_META_RIGHT_ON  | AMETA_META_ON,
    AMETA_SHIFT_MASK            = AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON | AMETA_SHIFT_ON,
};

class nsAndroidDisplayport final : public nsIAndroidDisplayport
{
public:
    NS_DECL_ISUPPORTS
    virtual nsresult GetLeft(float *aLeft) override { *aLeft = mLeft; return NS_OK; }
    virtual nsresult GetTop(float *aTop) override { *aTop = mTop; return NS_OK; }
    virtual nsresult GetRight(float *aRight) override { *aRight = mRight; return NS_OK; }
    virtual nsresult GetBottom(float *aBottom) override { *aBottom = mBottom; return NS_OK; }
    virtual nsresult GetResolution(float *aResolution) override { *aResolution = mResolution; return NS_OK; }
    virtual nsresult SetLeft(float aLeft) override { mLeft = aLeft; return NS_OK; }
    virtual nsresult SetTop(float aTop) override { mTop = aTop; return NS_OK; }
    virtual nsresult SetRight(float aRight) override { mRight = aRight; return NS_OK; }
    virtual nsresult SetBottom(float aBottom) override { mBottom = aBottom; return NS_OK; }
    virtual nsresult SetResolution(float aResolution) override { mResolution = aResolution; return NS_OK; }

    nsAndroidDisplayport(AndroidRectF aRect, float aResolution):
        mLeft(aRect.Left()), mTop(aRect.Top()), mRight(aRect.Right()), mBottom(aRect.Bottom()), mResolution(aResolution) {}

private:
    ~nsAndroidDisplayport() {}
    float mLeft, mTop, mRight, mBottom, mResolution;
};

class AndroidMotionEvent
{
public:
    enum {
        ACTION_DOWN = 0,
        ACTION_UP = 1,
        ACTION_MOVE = 2,
        ACTION_CANCEL = 3,
        ACTION_OUTSIDE = 4,
        ACTION_POINTER_DOWN = 5,
        ACTION_POINTER_UP = 6,
        ACTION_HOVER_MOVE = 7,
        ACTION_HOVER_ENTER = 9,
        ACTION_HOVER_EXIT = 10,
        ACTION_MAGNIFY_START = 11,
        ACTION_MAGNIFY = 12,
        ACTION_MAGNIFY_END = 13,
        EDGE_TOP = 0x00000001,
        EDGE_BOTTOM = 0x00000002,
        EDGE_LEFT = 0x00000004,
        EDGE_RIGHT = 0x00000008,
        SAMPLE_X = 0,
        SAMPLE_Y = 1,
        SAMPLE_PRESSURE = 2,
        SAMPLE_SIZE = 3,
        NUM_SAMPLE_DATA = 4,
        TOOL_TYPE_UNKNOWN = 0,
        TOOL_TYPE_FINGER = 1,
        TOOL_TYPE_STYLUS = 2,
        TOOL_TYPE_MOUSE = 3,
        TOOL_TYPE_ERASER = 4,
        dummy_java_enum_list_end
    };
};

class AndroidLocation : public WrappedJavaObject
{
public:
    static void InitLocationClass(JNIEnv *jEnv);
    static nsGeoPosition* CreateGeoPosition(JNIEnv *jenv, jobject jobj);
    static jclass jLocationClass;
    static jmethodID jGetLatitudeMethod;
    static jmethodID jGetLongitudeMethod;
    static jmethodID jGetAltitudeMethod;
    static jmethodID jGetAccuracyMethod;
    static jmethodID jGetBearingMethod;
    static jmethodID jGetSpeedMethod;
    static jmethodID jGetTimeMethod;
};

class AndroidGeckoEvent : public WrappedJavaObject
{
private:
    AndroidGeckoEvent() {
    }

    void Init(JNIEnv *jenv, jobject jobj);
    void Init(int aType);
    void Init(AndroidGeckoEvent *aResizeEvent);

public:
    static void InitGeckoEventClass(JNIEnv *jEnv);

    static AndroidGeckoEvent* MakeNativePoke() {
        AndroidGeckoEvent *event = new AndroidGeckoEvent();
        event->Init(NATIVE_POKE);
        return event;
    }

    static AndroidGeckoEvent* MakeFromJavaObject(JNIEnv *jenv, jobject jobj) {
        AndroidGeckoEvent *event = new AndroidGeckoEvent();
        event->Init(jenv, jobj);
        return event;
    }

    static AndroidGeckoEvent* CopyResizeEvent(AndroidGeckoEvent *aResizeEvent) {
        AndroidGeckoEvent *event = new AndroidGeckoEvent();
        event->Init(aResizeEvent);
        return event;
    }

    static AndroidGeckoEvent* MakeBroadcastEvent(const nsCString& topic, const nsCString& data) {
        AndroidGeckoEvent* event = new AndroidGeckoEvent();
        event->Init(BROADCAST);
        CopyUTF8toUTF16(topic, event->mCharacters);
        CopyUTF8toUTF16(data, event->mCharactersExtra);
        return event;
    }

    static AndroidGeckoEvent* MakeAddObserver(const nsAString &key, nsIObserver *observer) {
        AndroidGeckoEvent *event = new AndroidGeckoEvent();
        event->Init(ADD_OBSERVER);
        event->mCharacters.Assign(key);
        event->mObserver = observer;
        return event;
    }

    static AndroidGeckoEvent* MakeApzInputEvent(const MultiTouchInput& aInput, const mozilla::layers::ScrollableLayerGuid& aGuid, uint64_t aInputBlockId, nsEventStatus aEventStatus) {
        AndroidGeckoEvent* event = new AndroidGeckoEvent();
        event->Init(APZ_INPUT_EVENT);
        event->mApzInput = aInput;
        event->mApzGuid = aGuid;
        event->mApzInputBlockId = aInputBlockId;
        event->mApzEventStatus = aEventStatus;
        return event;
    }

    bool IsInputEvent() const {
        return mType == AndroidGeckoEvent::MOTION_EVENT ||
            mType == AndroidGeckoEvent::NATIVE_GESTURE_EVENT ||
            mType == AndroidGeckoEvent::LONG_PRESS ||
            mType == AndroidGeckoEvent::APZ_INPUT_EVENT;
    }

    int Action() { return mAction; }
    int Type() { return mType; }
    bool AckNeeded() { return mAckNeeded; }
    int64_t Time() { return mTime; }
    const nsTArray<nsIntPoint>& Points() { return mPoints; }
    const nsTArray<int>& PointIndicies() { return mPointIndicies; }
    const nsTArray<float>& Pressures() { return mPressures; }
    const nsTArray<int>& ToolTypes() { return mToolTypes; }
    const nsTArray<float>& Orientations() { return mOrientations; }
    const nsTArray<nsIntPoint>& PointRadii() { return mPointRadii; }
    double X() { return mX; }
    double Y() { return mY; }
    double Z() { return mZ; }
    double W() { return mW; }
    const nsIntRect& Rect() { return mRect; }
    nsAString& Characters() { return mCharacters; }
    nsAString& CharactersExtra() { return mCharactersExtra; }
    nsAString& Data() { return mData; }
    int MetaState() { return mMetaState; }
    Modifiers DOMModifiers() const;
    bool IsAltPressed() const { return (mMetaState & AMETA_ALT_MASK) != 0; }
    bool IsShiftPressed() const { return (mMetaState & AMETA_SHIFT_MASK) != 0; }
    bool IsCtrlPressed() const { return (mMetaState & AMETA_CTRL_MASK) != 0; }
    bool IsMetaPressed() const { return (mMetaState & AMETA_META_MASK) != 0; }
    int Flags() { return mFlags; }
    int Count() { return mCount; }
    int PointerIndex() { return mPointerIndex; }
    nsGeoPosition* GeoPosition() { return mGeoPosition; }
    int ConnectionType() { return mConnectionType; }
    bool IsWifi() { return mIsWifi; }
    int DHCPGateway() { return mDHCPGateway; }
    short ScreenOrientation() { return mScreenOrientation; }
    short ScreenAngle() { return mScreenAngle; }
    RefCountedJavaObject* ByteBuffer() { return mByteBuffer; }
    int Width() { return mWidth; }
    int Height() { return mHeight; }
    int ID() { return mID; }
    int GamepadButton() { return mGamepadButton; }
    bool GamepadButtonPressed() { return mGamepadButtonPressed; }
    float GamepadButtonValue() { return mGamepadButtonValue; }
    const nsTArray<float>& GamepadValues() { return mGamepadValues; }
    int RequestId() { return mCount; } // for convenience
    bool CanCoalesceWith(AndroidGeckoEvent* ae);
    WidgetTouchEvent MakeTouchEvent(nsIWidget* widget);
    MultiTouchInput MakeMultiTouchInput(nsIWidget* widget);
    WidgetMouseEvent MakeMouseEvent(nsIWidget* widget);
    void UnionRect(nsIntRect const& aRect);
    nsIObserver *Observer() { return mObserver; }
    mozilla::layers::ScrollableLayerGuid ApzGuid();
    uint64_t ApzInputBlockId();
    nsEventStatus ApzEventStatus();

protected:
    int mAction;
    int mType;
    bool mAckNeeded;
    int64_t mTime;
    nsTArray<nsIntPoint> mPoints;
    nsTArray<nsIntPoint> mPointRadii;
    nsTArray<int> mPointIndicies;
    nsTArray<float> mOrientations;
    nsTArray<float> mPressures;
    nsTArray<int> mToolTypes;
    nsIntRect mRect;
    int mFlags, mMetaState;
    int mCount;
    double mX, mY, mZ, mW;
    int mPointerIndex;
    nsString mCharacters, mCharactersExtra, mData;
    RefPtr<nsGeoPosition> mGeoPosition;
    int mConnectionType;
    bool mIsWifi;
    int mDHCPGateway;
    short mScreenOrientation;
    short mScreenAngle;
    RefPtr<RefCountedJavaObject> mByteBuffer;
    int mWidth, mHeight;
    int mID;
    int mGamepadButton;
    bool mGamepadButtonPressed;
    float mGamepadButtonValue;
    nsTArray<float> mGamepadValues;
    nsCOMPtr<nsIObserver> mObserver;
    MultiTouchInput mApzInput;
    mozilla::layers::ScrollableLayerGuid mApzGuid;
    uint64_t mApzInputBlockId;
    nsEventStatus mApzEventStatus;

    void ReadIntArray(nsTArray<int> &aVals,
                      JNIEnv *jenv,
                      jfieldID field,
                      int32_t count);
    void ReadFloatArray(nsTArray<float> &aVals,
                        JNIEnv *jenv,
                        jfieldID field,
                        int32_t count);
    void ReadPointArray(nsTArray<nsIntPoint> &mPoints,
                        JNIEnv *jenv,
                        jfieldID field,
                        int32_t count);
    void ReadStringArray(nsTArray<nsString> &aStrings,
                         JNIEnv *jenv,
                         jfieldID field);
    void ReadRectField(JNIEnv *jenv);
    void ReadCharactersField(JNIEnv *jenv);
    void ReadCharactersExtraField(JNIEnv *jenv);
    void ReadDataField(JNIEnv *jenv);
    void ReadStringFromJString(nsString &aString, JNIEnv *jenv, jstring s);

    static jclass jGeckoEventClass;
    static jfieldID jActionField;
    static jfieldID jTypeField;
    static jfieldID jAckNeededField;
    static jfieldID jTimeField;
    static jfieldID jPoints;
    static jfieldID jPointIndicies;
    static jfieldID jOrientations;
    static jfieldID jPressures;
    static jfieldID jToolTypes;
    static jfieldID jPointRadii;
    static jfieldID jXField;
    static jfieldID jYField;
    static jfieldID jZField;
    static jfieldID jWField;
    static jfieldID jDistanceField;
    static jfieldID jRectField;

    static jfieldID jCharactersField;
    static jfieldID jCharactersExtraField;
    static jfieldID jDataField;
    static jfieldID jMetaStateField;
    static jfieldID jFlagsField;
    static jfieldID jCountField;
    static jfieldID jPointerIndexField;
    static jfieldID jLocationField;

    static jfieldID jConnectionTypeField;
    static jfieldID jIsWifiField;
    static jfieldID jDHCPGatewayField;

    static jfieldID jScreenOrientationField;
    static jfieldID jScreenAngleField;
    static jfieldID jByteBufferField;

    static jfieldID jWidthField;
    static jfieldID jHeightField;

    static jfieldID jIDField;
    static jfieldID jGamepadButtonField;
    static jfieldID jGamepadButtonPressedField;
    static jfieldID jGamepadButtonValueField;
    static jfieldID jGamepadValuesField;

public:
    enum {
        NATIVE_POKE = 0,
        MOTION_EVENT = 2,
        SENSOR_EVENT = 3,
        LOCATION_EVENT = 5,
        SIZE_CHANGED = 8,
        APP_BACKGROUNDING = 9,
        APP_FOREGROUNDING = 10,
        LOAD_URI = 12,
        NOOP = 15,
        FORCED_RESIZE = 16, // used internally in nsAppShell/nsWindow
        APZ_INPUT_EVENT = 17, // used internally in AndroidJNI/nsAppShell/nsWindow
        BROADCAST = 19,
        VIEWPORT = 20,
        VISITED = 21,
        NETWORK_CHANGED = 22,
        THUMBNAIL = 25,
        SCREENORIENTATION_CHANGED = 27,
        NATIVE_GESTURE_EVENT = 31,
        CALL_OBSERVER = 33,
        REMOVE_OBSERVER = 34,
        LOW_MEMORY = 35,
        NETWORK_LINK_CHANGE = 36,
        TELEMETRY_HISTOGRAM_ADD = 37,
        ADD_OBSERVER = 38,
        TELEMETRY_UI_SESSION_START = 42,
        TELEMETRY_UI_SESSION_STOP = 43,
        TELEMETRY_UI_EVENT = 44,
        GAMEPAD_ADDREMOVE = 45,
        GAMEPAD_DATA = 46,
        LONG_PRESS = 47,
        ZOOMEDVIEW = 48,
        dummy_java_enum_list_end
    };

    enum {
        // Memory pressure levels. Keep these in sync with those in MemoryMonitor.java.
        MEMORY_PRESSURE_NONE = 0,
        MEMORY_PRESSURE_CLEANUP = 1,
        MEMORY_PRESSURE_LOW = 2,
        MEMORY_PRESSURE_MEDIUM = 3,
        MEMORY_PRESSURE_HIGH = 4
    };

    enum {
        ACTION_GAMEPAD_ADDED = 1,
        ACTION_GAMEPAD_REMOVED = 2
    };

    enum {
        ACTION_GAMEPAD_BUTTON = 1,
        ACTION_GAMEPAD_AXES = 2
    };
};

class nsJNIString : public nsString
{
public:
    nsJNIString(jstring jstr, JNIEnv *jenv);
};

class nsJNICString : public nsCString
{
public:
    nsJNICString(jstring jstr, JNIEnv *jenv);
};

}

#endif