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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/layout/ng/list/layout_ng_list_marker.h"
#include "third_party/blink/renderer/core/layout/layout_text.h"
#include "third_party/blink/renderer/core/layout/ng/list/layout_ng_list_item.h"
namespace blink {
LayoutNGListMarker::LayoutNGListMarker(Element* element)
: LayoutNGMixin<LayoutBlockFlow>(element) {}
LayoutNGListMarker* LayoutNGListMarker::CreateAnonymous(Document* document) {
LayoutNGListMarker* object = new LayoutNGListMarker(nullptr);
object->SetDocumentForAnonymous(document);
return object;
}
bool LayoutNGListMarker::IsOfType(LayoutObjectType type) const {
return type == kLayoutObjectNGListMarker ||
LayoutNGMixin<LayoutBlockFlow>::IsOfType(type);
}
bool LayoutNGListMarker::IsListMarkerWrapperForBlockContent(
const LayoutObject& object) {
const auto* block_flow = DynamicTo<LayoutBlockFlow>(object);
if (!object.IsAnonymous() || !block_flow)
return false;
if (const LayoutObject* child = block_flow->FirstChild()) {
return child->IsLayoutNGListMarker() &&
// The anonymous box should not have other children.
// e.g., <li>text<div>block</div></li>
// In this case, inline layout can handle the list marker.
!child->NextSibling();
}
return false;
}
// The LayoutNGListItem this marker belongs to.
LayoutNGListItem* LayoutNGListMarker::ListItem() const {
for (LayoutObject* parent = Parent(); parent; parent = parent->Parent()) {
if (parent->IsLayoutNGListItem()) {
DCHECK(ToLayoutNGListItem(parent)->Marker() == this);
return ToLayoutNGListItem(parent);
}
// These DCHECKs are not critical but to ensure we cover all cases we know.
DCHECK(parent->IsAnonymous());
DCHECK(parent->IsLayoutBlockFlow() || parent->IsLayoutFlowThread());
}
return nullptr;
}
void LayoutNGListMarker::WillCollectInlines() {
if (LayoutNGListItem* list_item = ListItem())
list_item->UpdateMarkerTextIfNeeded();
}
bool LayoutNGListMarker::IsContentImage() const {
return ListItem()->IsMarkerImage();
}
LayoutObject* LayoutNGListMarker::SymbolMarkerLayoutText() const {
return ListItem()->SymbolMarkerLayoutText();
}
String LayoutNGListMarker::TextAlternative() const {
// Compute from the list item, in the logical order even in RTL, reflecting
// speech order.
if (LayoutNGListItem* list_item = ListItem())
return list_item->MarkerTextWithSuffix();
return g_empty_string;
}
bool LayoutNGListMarker::NeedsOccupyWholeLine() const {
if (!GetDocument().InQuirksMode())
return false;
LayoutObject* next_sibling = NextSibling();
if (next_sibling && next_sibling->GetNode() &&
(IsHTMLUListElement(*next_sibling->GetNode()) ||
IsHTMLOListElement(*next_sibling->GetNode())))
return true;
return false;
}
} // namespace blink
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