blob: edc0e4003469847171f785021c29c5c912eb63ee [file] [log] [blame]
/*
* 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 "core/html/imports/HTMLImportChild.h"
#include "core/css/StyleSheetList.h"
#include "core/dom/Document.h"
#include "core/dom/StyleEngine.h"
#include "core/dom/custom/CustomElement.h"
#include "core/dom/custom/CustomElementMicrotaskImportStep.h"
#include "core/dom/custom/CustomElementSyncMicrotaskQueue.h"
#include "core/frame/UseCounter.h"
#include "core/html/imports/HTMLImportChildClient.h"
#include "core/html/imports/HTMLImportLoader.h"
#include "core/html/imports/HTMLImportTreeRoot.h"
#include "core/html/imports/HTMLImportsController.h"
namespace blink {
HTMLImportChild::HTMLImportChild(const KURL& url, HTMLImportLoader* loader, SyncMode sync)
: HTMLImport(sync)
, m_url(url)
#if !ENABLE(OILPAN)
, m_weakFactory(this)
#endif
, m_loader(loader)
, m_client(nullptr)
{
}
HTMLImportChild::~HTMLImportChild()
{
#if !ENABLE(OILPAN)
// dispose() should be called before the destruction.
ASSERT(!m_loader);
#endif
}
void HTMLImportChild::ownerInserted()
{
if (!m_loader->isDone())
return;
root()->document()->styleEngine().resolverChanged(FullStyleUpdate);
}
void HTMLImportChild::didShareLoader()
{
createCustomElementMicrotaskStepIfNeeded();
stateWillChange();
}
void HTMLImportChild::didStartLoading()
{
createCustomElementMicrotaskStepIfNeeded();
}
void HTMLImportChild::didFinish()
{
if (m_client)
m_client->didFinish();
}
void HTMLImportChild::didFinishLoading()
{
stateWillChange();
if (document() && document()->styleSheets()->length() > 0)
UseCounter::count(root()->document(), UseCounter::HTMLImportsHasStyleSheets);
CustomElement::didFinishLoadingImport(*(root()->document()));
}
void HTMLImportChild::didFinishUpgradingCustomElements()
{
stateWillChange();
m_customElementMicrotaskStep.clear();
}
void HTMLImportChild::dispose()
{
invalidateCustomElementMicrotaskStep();
if (parent())
parent()->removeChild(this);
ASSERT(m_loader);
m_loader->removeImport(this);
m_loader = nullptr;
if (m_client) {
m_client->importChildWasDisposed(this);
m_client = nullptr;
}
}
Document* HTMLImportChild::document() const
{
ASSERT(m_loader);
return m_loader->document();
}
void HTMLImportChild::stateWillChange()
{
toHTMLImportTreeRoot(root())->scheduleRecalcState();
}
void HTMLImportChild::stateDidChange()
{
HTMLImport::stateDidChange();
if (state().isReady())
didFinish();
}
void HTMLImportChild::invalidateCustomElementMicrotaskStep()
{
if (!m_customElementMicrotaskStep)
return;
m_customElementMicrotaskStep->invalidate();
m_customElementMicrotaskStep.clear();
}
void HTMLImportChild::createCustomElementMicrotaskStepIfNeeded()
{
ASSERT(!m_customElementMicrotaskStep);
if (!hasFinishedLoading() && !formsCycle()) {
#if ENABLE(OILPAN)
m_customElementMicrotaskStep = CustomElement::didCreateImport(this);
#else
m_customElementMicrotaskStep = CustomElement::didCreateImport(this)->weakPtr();
#endif
}
}
bool HTMLImportChild::hasFinishedLoading() const
{
ASSERT(m_loader);
return m_loader->isDone() && m_loader->microtaskQueue()->isEmpty() && !m_customElementMicrotaskStep;
}
HTMLImportLoader* HTMLImportChild::loader() const
{
// This should never be called after dispose().
ASSERT(m_loader);
return m_loader;
}
void HTMLImportChild::setClient(HTMLImportChildClient* client)
{
ASSERT(client);
ASSERT(!m_client);
m_client = client;
}
#if !ENABLE(OILPAN)
void HTMLImportChild::clearClient()
{
// Doesn't check m_client nullity because we allow
// clearClient() to reenter.
m_client = nullptr;
}
#endif
HTMLLinkElement* HTMLImportChild::link() const
{
if (!m_client)
return nullptr;
return m_client->link();
}
// Ensuring following invariants against the import tree:
// - HTMLImportChild::firstImport() is the "first import" of the DFS order of the import tree.
// - The "first import" manages all the children that is loaded by the document.
void HTMLImportChild::normalize()
{
if (!loader()->isFirstImport(this) && this->precedes(loader()->firstImport())) {
HTMLImportChild* oldFirst = loader()->firstImport();
loader()->moveToFirst(this);
takeChildrenFrom(oldFirst);
}
for (HTMLImportChild* child = toHTMLImportChild(firstChild()); child; child = toHTMLImportChild(child->next())) {
if (child->formsCycle())
child->invalidateCustomElementMicrotaskStep();
child->normalize();
}
}
#if !defined(NDEBUG)
void HTMLImportChild::showThis()
{
bool isFirst = loader() ? loader()->isFirstImport(this) : false;
HTMLImport::showThis();
fprintf(stderr, " loader=%p first=%d, step=%p sync=%s url=%s",
m_loader.get(),
isFirst,
m_customElementMicrotaskStep.get(),
isSync() ? "Y" : "N",
url().string().utf8().data());
}
#endif
DEFINE_TRACE(HTMLImportChild)
{
visitor->trace(m_customElementMicrotaskStep);
visitor->trace(m_loader);
visitor->trace(m_client);
HTMLImport::trace(visitor);
}
} // namespace blink