cocos_lib/cocos/bindings/jswrapper/sm/Utils.cpp

/****************************************************************************
 Copyright (c) 2016 Chukong Technologies Inc.
 Copyright (c) 2017-2023 Xiamen Yaji Software Co., Ltd.

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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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#include "Utils.h"

#if SCRIPT_ENGINE_TYPE == SCRIPT_ENGINE_SM

    #include "Class.h"
    #include "Object.h"
    #include "ScriptEngine.h"

namespace se {

namespace internal {

void *SE_JS_GetPrivate(JSObject *obj, uint32_t slot) {
    assert(slot >= 0 && slot < 2);
    const auto &v = JS::GetReservedSlot(obj, slot);
    return v.isNullOrUndefined() ? nullptr : v.toPrivate();
}

void SE_JS_SetPrivate(JSObject *obj, uint32_t slot, void *data) {
    assert(slot >= 0 && slot < 2);
    JS::SetReservedSlot(obj, slot, JS::PrivateValue(data));
}

bool isJSBClass(JSObject *obj) {
    const JSClass *cls = JS::GetClass(obj);
    return (cls->flags & (JSCLASS_HAS_RESERVED_SLOTS(2)) && (cls->flags & JSCLASS_USERBIT1));
}

void forceConvertJsValueToStdString(JSContext *cx, JS::HandleValue jsval, std::string *ret) {
    assert(ret != nullptr);
    JS::RootedString jsStr(cx, JS::ToString(cx, jsval));
    *ret = jsToStdString(cx, jsStr);
}

std::string jsToStdString(JSContext *cx, JS::HandleString jsStr) {
    JS::UniqueChars str = JS_EncodeStringToUTF8(cx, jsStr);
    std::string ret(str.get());
    return ret;
}

void jsToSeArgs(JSContext *cx, int argc, const JS::CallArgs &argv, ValueArray &outArr) {
    for (int i = 0; i < argc; ++i) {
        jsToSeValue(cx, argv[i], &outArr[i]);
    }
}

void seToJsArgs(JSContext *cx, const ValueArray &args, JS::RootedValueVector *outArr) {
    for (const auto &arg : args) {
        JS::RootedValue v(cx);
        seToJsValue(cx, arg, &v);
        outArr->append(v);
    }
}

void seToJsValue(JSContext *cx, const Value &arg, JS::MutableHandleValue outVal) {
    switch (arg.getType()) {
        case Value::Type::Number: {
            JS::RootedValue value(cx);
            value.setDouble(arg.toNumber());
            outVal.set(value);
        } break;

        case Value::Type::String: {
            JS::UTF8Chars utf8Str(arg.toString().c_str(), arg.toString().length());
            JSString *string = JS_NewStringCopyUTF8N(cx, utf8Str);
            JS::RootedValue value(cx);
            value.setString(string);
            outVal.set(value);
        } break;

        case Value::Type::Boolean: {
            JS::RootedValue value(cx);
            value.setBoolean(arg.toBoolean());
            outVal.set(value);
        } break;

        case Value::Type::Object: {
            JS::RootedValue value(cx, JS::ObjectValue(*arg.toObject()->_getJSObject()));
            outVal.set(value);
        } break;

        case Value::Type::Null: {
            JS::RootedValue value(cx);
            value.setNull();
            outVal.set(value);
        } break;

        case Value::Type::Undefined: {
            JS::RootedValue value(cx);
            value.setUndefined();
            outVal.set(value);
        } break;
        case Value::Type::BigInt: {
            JS::RootedValue value(cx);
            JS::BigInt *bi = JS::NumberToBigInt(cx, arg.toUint64());
            outVal.setBigInt(bi);
        } break;
        default:
            assert(false);
            break;
    }
}

void jsToSeValue(JSContext *cx, JS::HandleValue jsval, Value *v) {
    if (jsval.isNumber()) {
        v->setNumber(jsval.toNumber());
    } else if (jsval.isString()) {
        JS::RootedString jsstr(cx, jsval.toString());
        v->setString(jsToStdString(cx, jsstr));
    } else if (jsval.isBoolean()) {
        v->setBoolean(jsval.toBoolean());
    } else if (jsval.isObject()) {
        Object *object = nullptr;

        JS::RootedObject jsobj(cx, jsval.toObjectOrNull());
        PrivateObjectBase *privateObject = static_cast<PrivateObjectBase *>(internal::getPrivate(cx, jsobj, 0));
        void *nativeObj = privateObject ? privateObject->getRaw() : nullptr;
        bool needRoot = false;
        if (nativeObj != nullptr) {
            object = Object::getObjectWithPtr(nativeObj);
        }

        if (object == nullptr) {
            object = Object::_createJSObject(nullptr, jsobj);
            needRoot = true;
        }
        v->setObject(object, needRoot);
        object->decRef();
    } else if (jsval.isNull()) {
        v->setNull();
    } else if (jsval.isUndefined()) {
        v->setUndefined();
    } else if (jsval.isBigInt()) {
        v->setUint64(JS::ToBigUint64(jsval.toBigInt()));
    } else {
        assert(false);
    }
}

void setReturnValue(JSContext *cx, const Value &data, const JS::CallArgs &argv) {
    JS::RootedValue rval(cx);
    seToJsValue(cx, data, &rval);
    argv.rval().set(rval);
}

bool hasPrivate(JSContext *cx, JS::HandleObject obj) {
    return isJSBClass(obj);
}

void *getPrivate(JSContext *cx, JS::HandleObject obj, uint32_t slot) {
    bool found = isJSBClass(obj);
    if (found) {
        return SE_JS_GetPrivate(obj, slot);
    }

    return nullptr;
}

void setPrivate(JSContext *cx, JS::HandleObject obj, PrivateObjectBase *data, Object *seObj, PrivateData **outInternalData, JSFinalizeOp finalizeCb) {
    bool found = isJSBClass(obj);
    assert(found);
    if (found) {
        SE_JS_SetPrivate(obj, 0, data);
        SE_JS_SetPrivate(obj, 1, seObj);
        if (outInternalData != nullptr) {
            *outInternalData = nullptr;
        }
    }
}

void clearPrivate(JSContext *cx, JS::HandleObject obj) {
    bool found = isJSBClass(obj);
    if (found) {
        SE_JS_SetPrivate(obj, 0, nullptr);
        SE_JS_SetPrivate(obj, 1, nullptr);
    }
}

} // namespace internal
} // namespace se

#endif // #if SCRIPT_ENGINE_TYPE == SCRIPT_ENGINE_SM