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/**
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
*
* 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/css/style_sheet_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/frame/use_counter.h"
#include "third_party/blink/renderer/core/html/html_style_element.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
StyleSheetList* StyleSheetList::Create() {
DCHECK(RuntimeEnabledFeatures::ConstructableStylesheetsEnabled());
return MakeGarbageCollected<StyleSheetList>();
}
StyleSheetList* StyleSheetList::Create(
const HeapVector<Member<CSSStyleSheet>>& style_sheet_vector,
ExceptionState& exception_state) {
if (!RuntimeEnabledFeatures::ConstructableStylesheetsEnabled()) {
exception_state.ThrowTypeError("Illegal constructor");
return nullptr;
}
return MakeGarbageCollected<StyleSheetList>(style_sheet_vector);
}
StyleSheetList::StyleSheetList(
const HeapVector<Member<CSSStyleSheet>>& style_sheet_vector)
: style_sheet_vector_(style_sheet_vector) {}
StyleSheetList::StyleSheetList(TreeScope* tree_scope)
: tree_scope_(tree_scope) {
CHECK(tree_scope);
}
inline const HeapVector<TraceWrapperMember<StyleSheet>>&
StyleSheetList::StyleSheets() const {
return GetDocument()->GetStyleEngine().StyleSheetsForStyleSheetList(
*tree_scope_);
}
unsigned StyleSheetList::length() {
if (!tree_scope_)
return style_sheet_vector_.size();
return StyleSheets().size();
}
StyleSheet* StyleSheetList::item(unsigned index) {
if (!tree_scope_) {
return index < style_sheet_vector_.size() ? style_sheet_vector_[index].Get()
: nullptr;
}
const HeapVector<TraceWrapperMember<StyleSheet>>& sheets = StyleSheets();
return index < sheets.size() ? sheets[index].Get() : nullptr;
}
HTMLStyleElement* StyleSheetList::GetNamedItem(const AtomicString& name) const {
if (!tree_scope_)
return nullptr;
// IE also supports retrieving a stylesheet by name, using the name/id of the
// <style> tag (this is consistent with all the other collections) ### Bad
// implementation because returns a single element (are IDs always unique?)
// and doesn't look for name attribute. But unicity of stylesheet ids is good
// practice anyway ;)
// FIXME: We should figure out if we should change this or fix the spec.
Element* element = tree_scope_->getElementById(name);
return IsHTMLStyleElement(element) ? ToHTMLStyleElement(element) : nullptr;
}
CSSStyleSheet* StyleSheetList::AnonymousNamedGetter(const AtomicString& name) {
if (GetDocument()) {
UseCounter::Count(*GetDocument(),
WebFeature::kStyleSheetListAnonymousNamedGetter);
}
HTMLStyleElement* item = GetNamedItem(name);
if (!item)
return nullptr;
CSSStyleSheet* sheet = item->sheet();
if (sheet) {
UseCounter::Count(*GetDocument(),
WebFeature::kStyleSheetListNonNullAnonymousNamedGetter);
}
return sheet;
}
void StyleSheetList::Trace(blink::Visitor* visitor) {
visitor->Trace(tree_scope_);
visitor->Trace(style_sheet_vector_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink