scheduledaction.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

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 * Copyright (C) 2007-2009 Google Inc. All rights reserved.
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 *
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 * notice, this list of conditions and the following disclaimer.
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#include "config.h"
#include "ScheduledAction.h"

#include "Document.h"
#include "ScriptExecutionContext.h"
#include "ScriptSourceCode.h"

#include "V8Binding.h"
#include "V8Proxy.h"

namespace WebCore {

ScheduledAction::ScheduledAction(v8::Handle<v8::Function> func, int argc, v8::Handle<v8::Value> argv[])
    : m_code(String(), KURL(), 0)
{
    m_function = v8::Persistent<v8::Function>::New(func);

#ifndef NDEBUG
    V8Proxy::RegisterGlobalHandle(SCHEDULED_ACTION, this, m_function);
#endif

    m_argc = argc;
    if (argc > 0) {
        m_argv = new v8::Persistent<v8::Value>[argc];
        for (int i = 0; i < argc; i++) {
            m_argv[i] = v8::Persistent<v8::Value>::New(argv[i]);

#ifndef NDEBUG
    V8Proxy::RegisterGlobalHandle(SCHEDULED_ACTION, this, m_argv[i]);
#endif
        }
    } else
        m_argv = 0;
}

ScheduledAction::~ScheduledAction()
{
    if (m_function.IsEmpty())
        return;

#ifndef NDEBUG
    V8Proxy::UnregisterGlobalHandle(this, m_function);
#endif
    m_function.Dispose();

    for (int i = 0; i < m_argc; i++) {
#ifndef NDEBUG
        V8Proxy::UnregisterGlobalHandle(this, m_argv[i]);
#endif
        m_argv[i].Dispose();
    }

    if (m_argc > 0)
        delete[] m_argv;
}

void ScheduledAction::execute(ScriptExecutionContext* context)
{
    // FIXME: Timeouts for running the javascript code are not set.
    V8Proxy* proxy = V8Proxy::retrieve(context);
    if (!proxy)
        return;

    v8::HandleScope handleScope;
    v8::Local<v8::Context> v8Context = proxy->GetContext();
    if (v8Context.IsEmpty())
        return; // JS may not be enabled.

    v8::Context::Scope scope(v8Context);

    proxy->setTimerCallback(true);

    if (!m_function.IsEmpty() && m_function->IsFunction())
        proxy->CallFunction(v8::Persistent<v8::Function>::Cast(m_function), v8Context->Global(), m_argc, m_argv);
    else
        proxy->Evaluate(m_code.url(), m_code.startLine() - 1, m_code.source(), 0);

    if (context->isDocument())
        static_cast<Document*>(context)->updateRendering();

    proxy->setTimerCallback(false);
}

} // namespace WebCore