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/**
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003-2006, 2010, 2017 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 "RenderTreeUpdaterListItem.h"
#include "RenderChildIterator.h"
#include "RenderListMarker.h"
#include "RenderMultiColumnFlowThread.h"
#include "RenderRuby.h"
#include "RenderTable.h"
namespace WebCore {
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) || current.generatesLineBoxesForInlineChild(&child)))
return ¤t;
if (child.isFloating() || child.isOutOfFlowPositioned())
continue;
if (!is<RenderBlock>(child) || is<RenderTable>(child) || is<RenderRubyAsBlock>(child))
break;
if (is<RenderBox>(child) && downcast<RenderBox>(child).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;
}
void RenderTreeUpdater::ListItem::updateMarker(RenderListItem& listItemRenderer)
{
ASSERT_WITH_SECURITY_IMPLICATION(!listItemRenderer.view().layoutState());
auto& style = listItemRenderer.style();
if (style.listStyleType() == NoneListStyle && (!style.listStyleImage() || style.listStyleImage()->errorOccurred())) {
if (listItemRenderer.markerRenderer()) {
listItemRenderer.markerRenderer()->destroy();
ASSERT(!listItemRenderer.markerRenderer());
}
return;
}
auto newStyle = listItemRenderer.computeMarkerStyle();
auto* markerRenderer = listItemRenderer.markerRenderer();
if (markerRenderer)
markerRenderer->setStyle(WTFMove(newStyle));
else {
markerRenderer = WebCore::createRenderer<RenderListMarker>(listItemRenderer, WTFMove(newStyle)).leakPtr();
markerRenderer->initializeStyle();
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* multiColumnFlowThread = listItemRenderer.multiColumnFlowThread())
newParent = multiColumnFlowThread;
else
newParent = &listItemRenderer;
}
if (newParent != currentParent) {
markerRenderer->removeFromParent();
newParent->addChild(markerRenderer, 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())
currentParent->destroy();
}
}
}
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