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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2004-2020 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "JSPluginElementFunctions.h"
#include "BridgeJSC.h"
#include "HTMLNames.h"
#include "HTMLPlugInElement.h"
#include "JSHTMLElement.h"
#include "PluginViewBase.h"
namespace WebCore {
using namespace JSC;
using namespace Bindings;
using namespace HTMLNames;
// JavaScript access to plug-in-exported properties for JSHTMLEmbedElement and JSHTMLObjectElement.
static JSC_DECLARE_HOST_FUNCTION(callPlugin);
static JSC_DECLARE_CUSTOM_GETTER(pluginElementPropertyGetter);
Instance* pluginInstance(HTMLElement& element)
{
// The plugin element holds an owning reference, so we don't have to.
if (!is<HTMLPlugInElement>(element))
return nullptr;
auto* instance = downcast<HTMLPlugInElement>(element).bindingsInstance();
if (!instance || !instance->rootObject())
return nullptr;
return instance;
}
static JSObject* pluginScriptObjectFromPluginViewBase(HTMLPlugInElement& pluginElement, JSGlobalObject* globalObject)
{
Widget* pluginWidget = pluginElement.pluginWidget();
if (!is<PluginViewBase>(pluginWidget))
return nullptr;
return downcast<PluginViewBase>(*pluginWidget).scriptObject(globalObject);
}
static JSObject* pluginScriptObjectFromPluginViewBase(JSHTMLElement* jsHTMLElement)
{
HTMLElement& element = jsHTMLElement->wrapped();
if (!is<HTMLPlugInElement>(element))
return nullptr;
HTMLPlugInElement& pluginElement = downcast<HTMLPlugInElement>(element);
return pluginScriptObjectFromPluginViewBase(pluginElement, jsHTMLElement->globalObject());
}
JSObject* pluginScriptObject(JSGlobalObject* lexicalGlobalObject, JSHTMLElement* jsHTMLElement)
{
HTMLElement& element = jsHTMLElement->wrapped();
if (!is<HTMLPlugInElement>(element))
return nullptr;
auto& pluginElement = downcast<HTMLPlugInElement>(element);
// Choke point for script/plugin interaction; notify DOMTimer of the event.
DOMTimer::scriptDidInteractWithPlugin(pluginElement);
// See if we can ask the plug-in view for its script object.
if (auto* scriptObject = pluginScriptObjectFromPluginViewBase(pluginElement, jsHTMLElement->globalObject()))
return scriptObject;
// Otherwise, fall back to getting the object from the instance.
// The plugin element holds an owning reference, so we don't have to.
auto* instance = pluginElement.bindingsInstance();
if (!instance || !instance->rootObject())
return nullptr;
return instance->createRuntimeObject(lexicalGlobalObject);
}
JSC_DEFINE_CUSTOM_GETTER(pluginElementPropertyGetter, (JSGlobalObject* lexicalGlobalObject, EncodedJSValue thisValue, PropertyName propertyName))
{
VM& vm = lexicalGlobalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSHTMLElement* thisObject = jsDynamicCast<JSHTMLElement*>(vm, JSValue::decode(thisValue));
if (!thisObject)
return throwVMTypeError(lexicalGlobalObject, scope);
JSObject* scriptObject = pluginScriptObject(lexicalGlobalObject, thisObject);
if (!scriptObject)
return JSValue::encode(jsUndefined());
return JSValue::encode(scriptObject->get(lexicalGlobalObject, propertyName));
}
bool pluginElementCustomGetOwnPropertySlot(JSHTMLElement* element, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = lexicalGlobalObject->vm();
slot.setIsTaintedByOpaqueObject();
if (propertyName.uid() == vm.propertyNames->toPrimitiveSymbol.impl())
return false;
if (!element->globalObject()->world().isNormal()) {
JSValue proto = element->getPrototypeDirect(vm);
if (proto.isObject() && JSC::jsCast<JSC::JSObject*>(asObject(proto))->hasProperty(lexicalGlobalObject, propertyName))
return false;
}
if (slot.isVMInquiry()) {
slot.setValue(element, static_cast<unsigned>(JSC::PropertyAttribute::None), jsUndefined());
return false; // Can't execute stuff below because they can call back into JS.
}
JSObject* scriptObject = pluginScriptObject(lexicalGlobalObject, element);
if (!scriptObject)
return false;
if (!scriptObject->hasProperty(lexicalGlobalObject, propertyName))
return false;
slot.setCustom(element, JSC::PropertyAttribute::DontDelete | JSC::PropertyAttribute::DontEnum, pluginElementPropertyGetter);
return true;
}
bool pluginElementCustomPut(JSHTMLElement* element, JSGlobalObject* lexicalGlobalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot, bool& putResult)
{
JSObject* scriptObject = pluginScriptObject(lexicalGlobalObject, element);
if (!scriptObject)
return false;
if (!scriptObject->hasProperty(lexicalGlobalObject, propertyName))
return false;
putResult = scriptObject->methodTable(lexicalGlobalObject->vm())->put(scriptObject, lexicalGlobalObject, propertyName, value, slot);
return true;
}
JSC_DEFINE_HOST_FUNCTION(callPlugin, (JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame))
{
JSHTMLElement* element = jsCast<JSHTMLElement*>(callFrame->jsCallee());
// Get the plug-in script object.
JSObject* scriptObject = pluginScriptObject(lexicalGlobalObject, element);
ASSERT(scriptObject);
size_t argumentCount = callFrame->argumentCount();
MarkedArgumentBuffer argumentList;
for (size_t i = 0; i < argumentCount; i++)
argumentList.append(callFrame->argument(i));
ASSERT(!argumentList.hasOverflowed());
auto callData = getCallData(lexicalGlobalObject->vm(), scriptObject);
ASSERT(callData.type == CallData::Type::Native);
// Call the object.
JSValue result = call(lexicalGlobalObject, scriptObject, callData, callFrame->thisValue(), argumentList);
return JSValue::encode(result);
}
CallData pluginElementCustomGetCallData(JSHTMLElement* element)
{
CallData callData;
// First, ask the plug-in view base for its runtime object.
if (JSObject* scriptObject = pluginScriptObjectFromPluginViewBase(element)) {
VM& vm = scriptObject->vm();
auto scriptObjectCallData = getCallData(vm, scriptObject);
if (scriptObjectCallData.type != CallData::Type::None) {
callData.type = CallData::Type::Native;
callData.native.function = callPlugin;
}
} else {
Instance* instance = pluginInstance(element->wrapped());
if (instance && instance->supportsInvokeDefaultMethod()) {
callData.type = CallData::Type::Native;
callData.native.function = callPlugin;
}
}
return callData;
}
} // namespace WebCore
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