| /** |
| * (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/web_feature.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/instrumentation/use_counter.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| |
| namespace blink { |
| |
| StyleSheetList::StyleSheetList(TreeScope* tree_scope) |
| : tree_scope_(tree_scope) { |
| CHECK(tree_scope); |
| } |
| |
| inline const HeapVector<Member<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<Member<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 DynamicTo<HTMLStyleElement>(element); |
| } |
| |
| 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; |
| } |
| |
| bool StyleSheetList::NamedPropertyQuery(const AtomicString& name, |
| ExceptionState&) { |
| return AnonymousNamedGetter(name); |
| } |
| |
| void StyleSheetList::Trace(Visitor* visitor) const { |
| visitor->Trace(tree_scope_); |
| visitor->Trace(style_sheet_vector_); |
| ScriptWrappable::Trace(visitor); |
| } |
| |
| } // namespace blink |