| /* |
| * 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/V0CustomElement.h" |
| #include "core/dom/custom/V0CustomElementMicrotaskImportStep.h" |
| #include "core/dom/custom/V0CustomElementSyncMicrotaskQueue.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) |
| , m_loader(loader) |
| , m_client(nullptr) |
| { |
| } |
| |
| HTMLImportChild::~HTMLImportChild() |
| { |
| } |
| |
| 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); |
| V0CustomElement::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()) { |
| m_customElementMicrotaskStep = V0CustomElement::didCreateImport(this); |
| } |
| } |
| |
| 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; |
| } |
| |
| 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().getString().utf8().data()); |
| } |
| #endif |
| |
| DEFINE_TRACE(HTMLImportChild) |
| { |
| visitor->trace(m_customElementMicrotaskStep); |
| visitor->trace(m_loader); |
| visitor->trace(m_client); |
| HTMLImport::trace(visitor); |
| } |
| |
| } // namespace blink |