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/*
* Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007, 2008, 2009 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.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_COUNTER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_COUNTER_H_
#include "base/dcheck_is_on.h"
#include "third_party/blink/renderer/core/layout/layout_text.h"
#include "third_party/blink/renderer/core/style/content_data.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
namespace blink {
// LayoutCounter is used to represent the text of a counter.
// See http://www.w3.org/TR/CSS21/generate.html#counters
//
// Counters are always generated content ("content: counter(a)") thus this
// LayoutObject is always anonymous.
class LayoutCounter : public LayoutText {
public:
LayoutCounter(Document&, const CounterContentData&);
~LayoutCounter() override;
void Trace(Visitor*) const override;
const AtomicString& Identifier() const {
NOT_DESTROYED();
return counter_->Identifier();
}
// Generates and returns counter text based on computed counter values
// and list separators.
static String GenerateCounterText(Vector<int> counter_values,
const CounterStyle* counter_style,
const AtomicString& separator);
// Calls GenerateCounterText to update counter text.
void UpdateCounter(Vector<int> counter_values);
// Returns true if <counter-style> is "disclosure-open" or
// "disclosure-closed".
bool IsDirectionalSymbolMarker() const;
// Returns <string> in counters().
const AtomicString& Separator() const;
// Returns LayoutCounter::counter_->ListStyle() if `object` is a
// LayoutCounter.
// Returns style.ListStyleType()->GetCounterStyleName() otherwise.
static const AtomicString& ListStyle(const LayoutObject* object,
const ComputedStyle& style);
const char* GetName() const override {
NOT_DESTROYED();
return "LayoutCounter";
}
protected:
void WillBeDestroyed() override;
private:
bool IsCounter() const final {
NOT_DESTROYED();
return true;
}
const CounterStyle* NullableCounterStyle() const;
Member<const CounterContentData> counter_;
};
template <>
struct DowncastTraits<LayoutCounter> {
static bool AllowFrom(const LayoutObject& object) {
return object.IsCounter();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_COUNTER_H_
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