RenderTreeBuilderList.cpp [plain text]
#include "config.h"
#include "RenderTreeBuilderList.h"
#include "RenderChildIterator.h"
#include "RenderListMarker.h"
#include "RenderMultiColumnFlow.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;
}
RenderTreeBuilder::List::List(RenderTreeBuilder& builder)
: m_builder(builder)
{
}
void RenderTreeBuilder::List::updateItemMarker(RenderListItem& listItemRenderer)
{
auto& style = listItemRenderer.style();
if (style.listStyleType() == ListStyleType::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 (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, RenderTreeBuilder::CanCollapseAnonymousBlock::No), firstNonMarkerChild(*newParent));
else
m_builder.attach(*newParent, WTFMove(newMarkerRenderer), firstNonMarkerChild(*newParent));
if (currentParent && currentParent->isAnonymousBlock() && !currentParent->firstChild() && !downcast<RenderBlock>(*currentParent).continuation())
m_builder.destroy(*currentParent);
}
}