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/**
* Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 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/layout/layout_counter.h"
#include <memory>
#include "base/memory/ptr_util.h"
#include "base/numerics/clamped_math.h"
#include "third_party/blink/renderer/core/css/counter_style.h"
#include "third_party/blink/renderer/core/css/style_engine.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/element_traversal.h"
#include "third_party/blink/renderer/core/dom/flat_tree_traversal.h"
#include "third_party/blink/renderer/core/html/html_directory_element.h"
#include "third_party/blink/renderer/core/html/html_menu_element.h"
#include "third_party/blink/renderer/core/html/html_olist_element.h"
#include "third_party/blink/renderer/core/html/html_ulist_element.h"
#include "third_party/blink/renderer/core/html/list_item_ordinal.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
#if DCHECK_IS_ON()
#include <stdio.h>
#endif
namespace blink {
namespace {
String CounterTextFromStyleAndValue(const CounterStyle* counter_style,
int value) {
if (!counter_style) {
return g_empty_string;
}
return counter_style->GenerateRepresentation(value);
}
} // namespace
LayoutCounter::LayoutCounter(Document& document,
const CounterContentData& counter)
: LayoutText(nullptr, StringImpl::empty_), counter_(counter) {
SetDocumentForAnonymous(&document);
View()->AddLayoutCounter();
}
LayoutCounter::~LayoutCounter() = default;
void LayoutCounter::Trace(Visitor* visitor) const {
visitor->Trace(counter_);
LayoutText::Trace(visitor);
}
void LayoutCounter::WillBeDestroyed() {
NOT_DESTROYED();
if (View()) {
View()->RemoveLayoutCounter();
}
LayoutText::WillBeDestroyed();
}
String LayoutCounter::GenerateCounterText(Vector<int> counter_values,
const CounterStyle* counter_style,
const AtomicString& separator) {
String text =
CounterTextFromStyleAndValue(counter_style, counter_values.front());
if (!separator.IsNull()) {
for (wtf_size_t i = 1u; i < counter_values.size(); ++i) {
text = CounterTextFromStyleAndValue(counter_style, counter_values[i]) +
separator + text;
}
}
return text;
}
void LayoutCounter::UpdateCounter(Vector<int> counter_values) {
NOT_DESTROYED();
SetTextIfNeeded(
GenerateCounterText(counter_values, NullableCounterStyle(), Separator()));
}
const CounterStyle* LayoutCounter::NullableCounterStyle() const {
NOT_DESTROYED();
// Note: CSS3 spec doesn't allow 'none' but CSS2.1 allows it. We currently
// allow it for backward compatibility.
// See https://github.com/w3c/csswg-drafts/issues/5795 for details.
if (counter_->ListStyle() == "none") {
return nullptr;
}
return &GetDocument().GetStyleEngine().FindCounterStyleAcrossScopes(
counter_->ListStyle(), counter_->GetTreeScope());
}
bool LayoutCounter::IsDirectionalSymbolMarker() const {
NOT_DESTROYED();
const auto* counter_style = NullableCounterStyle();
if (!counter_style || !counter_style->IsPredefinedSymbolMarker()) {
return false;
}
const AtomicString& list_style = counter_->ListStyle();
return list_style == keywords::kDisclosureOpen ||
list_style == keywords::kDisclosureClosed;
}
const AtomicString& LayoutCounter::Separator() const {
NOT_DESTROYED();
return counter_->Separator();
}
// static
const AtomicString& LayoutCounter::ListStyle(const LayoutObject* object,
const ComputedStyle& style) {
if (const auto* counter = DynamicTo<LayoutCounter>(object)) {
return counter->counter_->ListStyle();
}
return style.ListStyleType()->GetCounterStyleName();
}
} // namespace blink
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