root/Source/core/html/imports/HTMLImportsController.cpp

DEFINITIONS

1. provideTo
2. m_recalcTimer
3. clear
4. createChild
5. load
6. showSecurityErrorMessage
7. findLinkFor
8. securityOrigin
9. fetcher
10. root
11. document
12. wasDetachedFromDocument
13. hasLoader
14. isDone
15. stateDidChange
16. scheduleRecalcState
17. recalcTimerFired

/*
 * Copyright (C) 2013 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 "core/html/imports/HTMLImportsController.h"

#include "core/dom/Document.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/frame/LocalFrame.h"
#include "core/html/imports/HTMLImportChild.h"
#include "core/html/imports/HTMLImportChildClient.h"

namespace WebCore {

void HTMLImportsController::provideTo(Document& master)
{
    DEFINE_STATIC_LOCAL(const char*, name, ("HTMLImportsController"));
    OwnPtr<HTMLImportsController> controller = adoptPtr(new HTMLImportsController(master));
    master.setImport(controller.get());
    DocumentSupplement::provideTo(master, name, controller.release());
}

HTMLImportsController::HTMLImportsController(Document& master)
    : m_master(&master)
    , m_recalcTimer(this, &HTMLImportsController::recalcTimerFired)
{
    recalcTreeState(this); // This recomputes initial state.
}

HTMLImportsController::~HTMLImportsController()
{
    ASSERT(!m_master);
}

void HTMLImportsController::clear()
{
    for (size_t i = 0; i < m_imports.size(); ++i)
        m_imports[i]->importDestroyed();
    if (m_master)
        m_master->setImport(0);
    m_master = 0;
    m_recalcTimer.stop();
}

HTMLImportChild* HTMLImportsController::createChild(const KURL& url, HTMLImport* parent, HTMLImportChildClient* client)
{
    OwnPtr<HTMLImportChild> loader = adoptPtr(new HTMLImportChild(*m_master, url, client->isSync() ? HTMLImport::Sync : HTMLImport::Async));
    loader->setClient(client);
    parent->appendChild(loader.get());
    m_imports.append(loader.release());
    return m_imports.last().get();
}

HTMLImportChild* HTMLImportsController::load(HTMLImport* parent, HTMLImportChildClient* client, FetchRequest request)
{
    ASSERT(!request.url().isEmpty() && request.url().isValid());

    if (findLinkFor(request.url())) {
        HTMLImportChild* child = createChild(request.url(), parent, client);
        child->wasAlreadyLoaded();
        return child;
    }

    bool sameOriginRequest = securityOrigin()->canRequest(request.url());
    request.setCrossOriginAccessControl(
        securityOrigin(), sameOriginRequest ? AllowStoredCredentials : DoNotAllowStoredCredentials,
        ClientDidNotRequestCredentials);
    ResourcePtr<RawResource> resource = parent->document()->fetcher()->fetchImport(request);
    if (!resource)
        return 0;

    HTMLImportChild* child = createChild(request.url(), parent, client);
    // We set resource after the import tree is built since
    // Resource::addClient() immediately calls back to feed the bytes when the resource is cached.
    child->startLoading(resource);

    return child;
}

void HTMLImportsController::showSecurityErrorMessage(const String& message)
{
    m_master->addConsoleMessage(JSMessageSource, ErrorMessageLevel, message);
}

HTMLImportChild* HTMLImportsController::findLinkFor(const KURL& url, HTMLImport* excluding) const
{
    for (size_t i = 0; i < m_imports.size(); ++i) {
        HTMLImportChild* candidate = m_imports[i].get();
        if (candidate != excluding && equalIgnoringFragmentIdentifier(candidate->url(), url) && candidate->hasLoader())
            return candidate;
    }

    return 0;
}

SecurityOrigin* HTMLImportsController::securityOrigin() const
{
    return m_master->securityOrigin();
}

ResourceFetcher* HTMLImportsController::fetcher() const
{
    return m_master->fetcher();
}

HTMLImportRoot* HTMLImportsController::root()
{
    return this;
}

Document* HTMLImportsController::document() const
{
    return m_master;
}

void HTMLImportsController::wasDetachedFromDocument()
{
    clear();
}

bool HTMLImportsController::hasLoader() const
{
    return true;
}

bool HTMLImportsController::isDone() const
{
    return !m_master->parsing() && m_master->haveStylesheetsLoaded();
}

void HTMLImportsController::stateDidChange()
{
    HTMLImport::stateDidChange();

    if (!state().isReady())
        return;
    if (LocalFrame* frame = m_master->frame())
        frame->loader().checkCompleted();
}

void HTMLImportsController::scheduleRecalcState()
{
    if (m_recalcTimer.isActive() || !m_master)
        return;
    m_recalcTimer.startOneShot(0, FROM_HERE);
}

void HTMLImportsController::recalcTimerFired(Timer<HTMLImportsController>*)
{
    ASSERT(m_master);

    do {
        m_recalcTimer.stop();
        HTMLImport::recalcTreeState(this);
    } while (m_recalcTimer.isActive());
}

} // namespace WebCore