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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
* (C) 2007 Rob Buis (buis@kde.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "third_party/blink/renderer/core/html/html_style_element.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/renderer/core/css/media_list.h"
#include "third_party/blink/renderer/core/css/style_engine.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
HTMLStyleElement::HTMLStyleElement(Document& document,
const CreateElementFlags flags)
: HTMLElement(html_names::kStyleTag, document),
StyleElement(&document, flags.IsCreatedByParser()) {}
HTMLStyleElement::~HTMLStyleElement() = default;
void HTMLStyleElement::ParseAttribute(
const AttributeModificationParams& params) {
if (params.name == html_names::kTitleAttr && sheet_ && IsInDocumentTree()) {
sheet_->SetTitle(params.new_value);
} else if (params.name == html_names::kMediaAttr && isConnected() &&
GetDocument().IsActive() && sheet_) {
sheet_->SetMediaQueries(
MediaQuerySet::Create(params.new_value, GetExecutionContext()));
GetDocument().GetStyleEngine().SetNeedsActiveStyleUpdate(GetTreeScope());
} else if (params.name == html_names::kTypeAttr) {
HTMLElement::ParseAttribute(params);
StyleElement::ChildrenChanged(*this);
} else {
HTMLElement::ParseAttribute(params);
}
}
void HTMLStyleElement::FinishParsingChildren() {
StyleElement::ProcessingResult result =
StyleElement::FinishParsingChildren(*this);
HTMLElement::FinishParsingChildren();
if (result == StyleElement::kProcessingFatalError)
NotifyLoadedSheetAndAllCriticalSubresources(
kErrorOccurredLoadingSubresource);
}
Node::InsertionNotificationRequest HTMLStyleElement::InsertedInto(
ContainerNode& insertion_point) {
HTMLElement::InsertedInto(insertion_point);
if (isConnected()) {
if (StyleElement::ProcessStyleSheet(GetDocument(), *this) ==
StyleElement::kProcessingFatalError) {
NotifyLoadedSheetAndAllCriticalSubresources(
kErrorOccurredLoadingSubresource);
}
}
return kInsertionDone;
}
void HTMLStyleElement::RemovedFrom(ContainerNode& insertion_point) {
HTMLElement::RemovedFrom(insertion_point);
StyleElement::RemovedFrom(*this, insertion_point);
}
void HTMLStyleElement::ChildrenChanged(const ChildrenChange& change) {
HTMLElement::ChildrenChanged(change);
if (StyleElement::ChildrenChanged(*this) ==
StyleElement::kProcessingFatalError)
NotifyLoadedSheetAndAllCriticalSubresources(
kErrorOccurredLoadingSubresource);
}
const AtomicString& HTMLStyleElement::media() const {
return FastGetAttribute(html_names::kMediaAttr);
}
const AtomicString& HTMLStyleElement::type() const {
return FastGetAttribute(html_names::kTypeAttr);
}
void HTMLStyleElement::DispatchPendingEvent(
std::unique_ptr<IncrementLoadEventDelayCount> count,
bool is_load_event) {
if (is_load_event) {
if (GetDocument().HasListenerType(
Document::kLoadListenerAtCapturePhaseOrAtStyleElement))
DispatchEvent(*Event::Create(event_type_names::kLoad));
} else {
DispatchEvent(*Event::Create(event_type_names::kError));
}
// Checks Document's load event synchronously here for performance.
// This is safe because dispatchPendingEvent() is called asynchronously.
count->ClearAndCheckLoadEvent();
}
void HTMLStyleElement::NotifyLoadedSheetAndAllCriticalSubresources(
LoadedSheetErrorStatus error_status) {
bool is_load_event = error_status == kNoErrorLoadingSubresource;
// Per the spec this should post on the network task source.
// https://html.spec.whatwg.org/multipage/semantics.html#the-style-element
// This guarantees that the <style> will be applied before the next <script>
// is loaded. Note: this means that for the potential future efforts to
// prioritise individual network requests we should ensure that their priority
// is lower than of this task.
GetDocument()
.GetTaskRunner(TaskType::kNetworking)
->PostTask(
FROM_HERE,
WTF::Bind(
&HTMLStyleElement::DispatchPendingEvent, WrapPersistent(this),
std::make_unique<IncrementLoadEventDelayCount>(GetDocument()),
is_load_event));
}
bool HTMLStyleElement::disabled() const {
if (!sheet_)
return false;
return sheet_->disabled();
}
void HTMLStyleElement::setDisabled(bool set_disabled) {
if (CSSStyleSheet* style_sheet = sheet())
style_sheet->setDisabled(set_disabled);
}
void HTMLStyleElement::Trace(Visitor* visitor) const {
StyleElement::Trace(visitor);
HTMLElement::Trace(visitor);
}
} // namespace blink
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