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/**
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003-2024 Apple Inc. All rights reserved.
* Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
*
* 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 "config.h"
#include "RenderTreeBuilderList.h"
#include "LegacyInlineIterator.h"
#include "LineInlineHeaders.h"
#include "RenderChildIterator.h"
#include "RenderListMarker.h"
#include "RenderMenuList.h"
#include "RenderMultiColumnFlow.h"
#include "RenderTable.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(RenderTreeBuilder::List);
// FIXME: This shouldn't need LegacyInlineIterator
static bool generatesLineBoxesForInlineChild(RenderBlock& current, RenderObject* inlineObj)
{
LegacyInlineIterator it(¤t, inlineObj, 0);
while (!it.atEnd() && !requiresLineBox(it))
it.increment();
return !it.atEnd();
}
static RenderBlock* getParentOfFirstLineBox(RenderBlock& current, RenderObject& marker)
{
bool inQuirksMode = current.document().inQuirksMode();
for (auto& child : childrenOfType<RenderObject>(current)) {
if (&child == &marker)
continue;
if (child.isInline() && (!is<RenderInline>(child) || generatesLineBoxesForInlineChild(current, &child)))
return ¤t;
if (child.isFloating() || child.isOutOfFlowPositioned() || is<RenderMenuList>(child))
continue;
if (!is<RenderBlock>(child) || is<RenderTable>(child))
break;
if (auto* renderBox = dynamicDowncast<RenderBox>(child); renderBox && renderBox->isWritingModeRoot())
break;
if (is<RenderListItem>(current) && inQuirksMode && child.node() && isHTMLListElement(*child.node()))
break;
if (RenderBlock* lineBox = getParentOfFirstLineBox(downcast<RenderBlock>(child), marker))
return lineBox;
}
return nullptr;
}
static RenderObject* firstNonMarkerChild(RenderBlock& parent)
{
RenderObject* child = parent.firstChild();
while (is<RenderListMarker>(child))
child = child->nextSibling();
return child;
}
RenderTreeBuilder::List::List(RenderTreeBuilder& builder)
: m_builder(builder)
{
}
void RenderTreeBuilder::List::updateItemMarker(RenderListItem& listItemRenderer)
{
auto& style = listItemRenderer.style();
if (style.listStyleType().type == ListStyleType::Type::None && (!style.listStyleImage() || style.listStyleImage()->errorOccurred())) {
if (auto* marker = listItemRenderer.markerRenderer())
m_builder.destroy(*marker);
return;
}
auto newStyle = listItemRenderer.computeMarkerStyle();
RenderPtr<RenderListMarker> newMarkerRenderer;
auto* markerRenderer = listItemRenderer.markerRenderer();
if (markerRenderer)
markerRenderer->setStyle(WTFMove(newStyle));
else {
newMarkerRenderer = WebCore::createRenderer<RenderListMarker>(listItemRenderer, WTFMove(newStyle));
newMarkerRenderer->initializeStyle();
markerRenderer = newMarkerRenderer.get();
listItemRenderer.setMarkerRenderer(*markerRenderer);
}
RenderElement* currentParent = markerRenderer->parent();
RenderBlock* newParent = getParentOfFirstLineBox(listItemRenderer, *markerRenderer);
if (!newParent) {
// If the marker is currently contained inside an anonymous box,
// then we are the only item in that anonymous box (since no line box
// parent was found). It's ok to just leave the marker where it is
// in this case.
if (currentParent && currentParent->isAnonymousBlock())
return;
if (auto* multiColumnFlow = listItemRenderer.multiColumnFlow())
newParent = multiColumnFlow;
else
newParent = &listItemRenderer;
}
if (newParent == currentParent)
return;
if (currentParent)
m_builder.attach(*newParent, m_builder.detach(*currentParent, *markerRenderer, WillBeDestroyed::No, RenderTreeBuilder::CanCollapseAnonymousBlock::No), firstNonMarkerChild(*newParent));
else
m_builder.attach(*newParent, WTFMove(newMarkerRenderer), firstNonMarkerChild(*newParent));
// If current parent is an anonymous block that has lost all its children, destroy it.
if (currentParent && currentParent->isAnonymousBlock() && !currentParent->firstChild() && !downcast<RenderBlock>(*currentParent).continuation())
m_builder.destroy(*currentParent);
}
}
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