140 lines
5.5 KiB
C++
140 lines
5.5 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "JSBasics.h"
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namespace WTR {
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std::optional<bool> toOptionalBool(JSContextRef context, JSValueRef value)
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{
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return JSValueIsUndefined(context, value) || JSValueIsNull(context, value) ? std::nullopt : std::make_optional(JSValueToBoolean(context, value));
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}
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std::optional<double> toOptionalDouble(JSContextRef context, JSValueRef value)
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{
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return JSValueIsUndefined(context, value) || JSValueIsNull(context, value) ? std::nullopt : std::make_optional(JSValueToNumber(context, value, nullptr));
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}
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JSValueRef makeValue(JSContextRef context, std::optional<bool> value)
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{
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return value ? JSValueMakeBoolean(context, value.value()) : JSValueMakeNull(context);
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}
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JSValueRef makeValue(JSContextRef context, JSStringRef string)
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{
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return string ? JSValueMakeString(context, string) : JSValueMakeNull(context);
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}
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JSRetainPtr<JSStringRef> createJSString(const char* string)
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{
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return adopt(JSStringCreateWithUTF8CString(string));
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}
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JSRetainPtr<JSStringRef> createJSString(JSContextRef context, JSValueRef value)
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{
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auto string = adopt(value ? JSValueToStringCopy(context, value, nullptr) : nullptr);
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return string ? string : createJSString("");
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}
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JSValueRef makeValue(JSContextRef context, const char* string)
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{
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return JSValueMakeString(context, createJSString(string).get());
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}
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JSValueRef property(JSContextRef context, JSObjectRef object, const char* name)
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{
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return object ? JSObjectGetProperty(context, object, createJSString(name).get(), nullptr) : nullptr;
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}
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JSRetainPtr<JSStringRef> stringProperty(JSContextRef context, JSObjectRef object, const char* name)
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{
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return createJSString(context, property(context, object, name));
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}
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bool booleanProperty(JSContextRef context, JSObjectRef object, const char* name, bool defaultValue)
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{
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auto value = property(context, object, name);
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return value ? JSValueToBoolean(context, value) : defaultValue;
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}
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double numericProperty(JSContextRef context, JSObjectRef object, const char* name)
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{
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auto value = property(context, object, name);
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return value ? JSValueToNumber(context, value, nullptr) : 0;
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}
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JSObjectRef objectProperty(JSContextRef context, JSObjectRef object, const char* name)
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{
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auto value = property(context, object, name);
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return value && JSValueIsObject(context, value) ? const_cast<JSObjectRef>(value) : nullptr;
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}
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JSObjectRef objectProperty(JSContextRef context, JSObjectRef object, std::initializer_list<const char*> names)
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{
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for (auto name : names)
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object = objectProperty(context, object, name);
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return object;
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}
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unsigned arrayLength(JSContextRef context, JSObjectRef object)
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{
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return numericProperty(context, object, "length");
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}
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void setProperty(JSContextRef context, JSObjectRef object, const char* name, bool value)
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{
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JSObjectSetProperty(context, object, createJSString(name).get(), JSValueMakeBoolean(context, value), kJSPropertyAttributeNone, nullptr);
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}
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void setProperty(JSContextRef context, JSObjectRef object, const char* name, double value)
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{
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JSObjectSetProperty(context, object, createJSString(name).get(), JSValueMakeNumber(context, value), kJSPropertyAttributeNone, nullptr);
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}
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void setGlobalObjectProperty(JSContextRef context, const char* name, JSValueRef value)
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{
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JSObjectSetProperty(context, JSContextGetGlobalObject(context), createJSString(name).get(), value, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete, nullptr);
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}
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void setGlobalObjectProperty(JSContextRef context, const char* name, double value)
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{
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setGlobalObjectProperty(context, name, JSValueMakeNumber(context, value));
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}
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JSValueRef call(JSContextRef context, JSObjectRef object, const char* name, std::initializer_list<JSValueRef> arguments)
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{
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auto function = objectProperty(context, object, name);
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return function ? JSObjectCallAsFunction(context, function, object, arguments.size(), arguments.begin(), nullptr) : nullptr;
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}
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JSObjectRef callConstructor(JSGlobalContextRef context, const char* name, std::initializer_list<JSValueRef> arguments)
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{
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auto constructor = objectProperty(context, JSContextGetGlobalObject(context), { name });
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return constructor ? JSObjectCallAsConstructor(context, constructor, arguments.size(), arguments.begin(), nullptr) : nullptr;
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}
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} // namespace WTR
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