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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DateExtension.h"
#include "V8Proxy.h"
#include "V8HiddenPropertyName.h"
namespace WebCore {
DateExtension* DateExtension::extension;
static const char* dateExtensionName = "v8/DateExtension";
static const char* dateExtensionScript =
"(function () {"
" var counter;"
" var orig_getTime;"
" function getTimeOverride() {"
" if (++counter > 1000)"
" OnSleepDetected();"
" return orig_getTime.call(this);"
" };"
" function enableSleepDetection(enable) {"
" if (enable) {"
" counter = 0;"
" orig_getTime = Date.prototype.getTime;"
" Date.prototype.getTime = getTimeOverride;"
" } else {"
" Date.prototype.getTime = orig_getTime;"
" }"
" };"
" native function Setup();"
" native function OnSleepDetected();"
" Setup(Date, enableSleepDetection);"
"})()";
DateExtension::DateExtension() : v8::Extension(dateExtensionName, dateExtensionScript)
{
}
DateExtension* DateExtension::get()
{
if (!extension)
extension = new DateExtension();
return extension;
}
void DateExtension::setAllowSleep(bool allow)
{
v8::Local<v8::Value> result = V8Proxy::currentContext()->Global()->Get(v8::String::New("Date"));
if (result.IsEmpty())
return;
v8::Handle<v8::Object> dateObject = v8::Handle<v8::Object>::Cast(result);
if (dateObject.IsEmpty())
return;
v8::Local<v8::Value> sleepFunctionHandle = dateObject->GetHiddenValue(V8HiddenPropertyName::sleepFunction());
if (sleepFunctionHandle.IsEmpty() || !sleepFunctionHandle->IsFunction())
return;
v8::Handle<v8::Value> argv[1];
argv[0] = v8::Boolean::New(!allow);
v8::Handle<v8::Function>::Cast(sleepFunctionHandle)->Call(v8::Object::New(), 1, argv);
}
v8::Handle<v8::FunctionTemplate> DateExtension::GetNativeFunction(v8::Handle<v8::String> name)
{
if (name->Equals(v8::String::New("Setup")))
return v8::FunctionTemplate::New(Setup);
if (name->Equals(v8::String::New("OnSleepDetected")))
return v8::FunctionTemplate::New(OnSleepDetected);
return v8::Handle<v8::FunctionTemplate>();
}
v8::Handle<v8::Value> DateExtension::Setup(const v8::Arguments& args)
{
if (args.Length() != 2 || !args[0]->IsObject() || !args[1]->IsFunction())
return v8::Undefined();
v8::Handle<v8::Object> dateObject = v8::Handle<v8::Object>::Cast(args[0]);
v8::Handle<v8::Function> enableSleepDetectionFunction = v8::Handle<v8::Function>::Cast(args[1]);
dateObject->SetHiddenValue(V8HiddenPropertyName::sleepFunction(), enableSleepDetectionFunction);
return v8::Undefined();
}
v8::Handle<v8::Value> DateExtension::OnSleepDetected(const v8::Arguments&)
{
V8Proxy::throwError(V8Proxy::GeneralError, "Too much time spent in unload handler.");
return v8::Undefined();
}
} // namespace WebCore
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