| /** |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2010 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 "RenderListItem.h" |
| |
| #include "CachedImage.h" |
| #include "HTMLNames.h" |
| #include "HTMLOListElement.h" |
| #include "RenderListMarker.h" |
| #include "RenderView.h" |
| #include "StyleInheritedData.h" |
| #include <wtf/StdLibExtras.h> |
| #include <wtf/text/StringBuilder.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| RenderListItem::RenderListItem(Node* node) |
| : RenderBlock(node) |
| , m_marker(0) |
| , m_hasExplicitValue(false) |
| , m_isValueUpToDate(false) |
| , m_notInList(false) |
| { |
| setInline(false); |
| } |
| |
| void RenderListItem::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| RenderBlock::styleDidChange(diff, oldStyle); |
| |
| if (style()->listStyleType() != NoneListStyle |
| || (style()->listStyleImage() && !style()->listStyleImage()->errorOccurred())) { |
| RefPtr<RenderStyle> newStyle = RenderStyle::create(); |
| // The marker always inherits from the list item, regardless of where it might end |
| // up (e.g., in some deeply nested line box). See CSS3 spec. |
| newStyle->inheritFrom(style()); |
| if (!m_marker) |
| m_marker = new (renderArena()) RenderListMarker(this); |
| m_marker->setStyle(newStyle.release()); |
| } else if (m_marker) { |
| m_marker->destroy(); |
| m_marker = 0; |
| } |
| } |
| |
| void RenderListItem::willBeDestroyed() |
| { |
| if (m_marker) { |
| m_marker->destroy(); |
| m_marker = 0; |
| } |
| RenderBlock::willBeDestroyed(); |
| } |
| |
| void RenderListItem::insertedIntoTree() |
| { |
| RenderBlock::insertedIntoTree(); |
| |
| updateListMarkerNumbers(); |
| } |
| |
| void RenderListItem::willBeRemovedFromTree() |
| { |
| RenderBlock::willBeRemovedFromTree(); |
| |
| updateListMarkerNumbers(); |
| } |
| |
| static bool isList(Node* node) |
| { |
| return (node->hasTagName(ulTag) || node->hasTagName(olTag)); |
| } |
| |
| static Node* enclosingList(const RenderListItem* listItem) |
| { |
| Node* firstNode = 0; |
| |
| for (const RenderObject* renderer = listItem->parent(); renderer; renderer = renderer->parent()) { |
| Node* node = renderer->node(); |
| if (node) { |
| if (isList(node)) |
| return node; |
| if (!firstNode) |
| firstNode = node; |
| } |
| } |
| |
| // If there's no actual <ul> or <ol> list element, then the first found |
| // node acts as our list for purposes of determining what other list items |
| // should be numbered as part of the same list. |
| return firstNode; |
| } |
| |
| RenderListItem* RenderListItem::nextListItem(RenderObject* list, const RenderListItem* item) |
| { |
| if (!list) |
| return 0; |
| |
| RenderObject* renderer = item ? item->nextInPreOrder(list) : list->nextInPreOrder(list); |
| while (renderer) { |
| if (renderer->node() && isList(renderer->node())) { |
| // We've found a nested, independent list: nothing to do here. |
| renderer = renderer->nextInPreOrderAfterChildren(list); |
| continue; |
| } |
| |
| if (renderer->isListItem()) |
| return toRenderListItem(renderer); |
| |
| renderer = renderer->nextInPreOrder(list); |
| } |
| return 0; |
| } |
| |
| static RenderListItem* previousListItem(RenderObject* list, const RenderListItem* item) |
| { |
| for (RenderObject* renderer = item->previousInPreOrder(); renderer && renderer != list; renderer = renderer->previousInPreOrder()) { |
| if (!renderer->isListItem()) |
| continue; |
| Node* otherList = enclosingList(toRenderListItem(renderer)); |
| // This item is part of our current list, so it's what we're looking for. |
| if (list->node() == otherList) |
| return toRenderListItem(renderer); |
| // We found ourself inside another list; lets skip the rest of it. |
| // Use nextInPreOrder() here because the other list itself may actually |
| // be a list item itself. We need to examine it, so we do this to counteract |
| // the previousInPreOrder() that will be done by the loop. |
| if (otherList) |
| renderer = otherList->renderer()->nextInPreOrder(); |
| } |
| return 0; |
| } |
| |
| inline int RenderListItem::calcValue() const |
| { |
| if (m_hasExplicitValue) |
| return m_explicitValue; |
| |
| Node* list = enclosingList(this); |
| RenderObject* listRenderer = list ? list->renderer() : 0; |
| HTMLOListElement* oListElement = (list && list->hasTagName(olTag)) ? static_cast<HTMLOListElement*>(list) : 0; |
| int valueStep = 1; |
| if (oListElement && oListElement->isReversed()) |
| valueStep = -1; |
| |
| // FIXME: This recurses to a possible depth of the length of the list. |
| // That's not good -- we need to change this to an iterative algorithm. |
| if (RenderListItem* previousItem = previousListItem(listRenderer, this)) |
| return previousItem->value() + valueStep; |
| |
| if (oListElement) |
| return oListElement->start(); |
| |
| return 1; |
| } |
| |
| void RenderListItem::updateValueNow() const |
| { |
| m_value = calcValue(); |
| m_isValueUpToDate = true; |
| } |
| |
| bool RenderListItem::isEmpty() const |
| { |
| return lastChild() == m_marker; |
| } |
| |
| static RenderObject* getParentOfFirstLineBox(RenderBlock* curr, RenderObject* marker) |
| { |
| RenderObject* firstChild = curr->firstChild(); |
| if (!firstChild) |
| return 0; |
| |
| bool inQuirksMode = curr->document()->inQuirksMode(); |
| for (RenderObject* currChild = firstChild; currChild; currChild = currChild->nextSibling()) { |
| if (currChild == marker) |
| continue; |
| |
| if (currChild->isInline() && (!currChild->isRenderInline() || curr->generatesLineBoxesForInlineChild(currChild))) |
| return curr; |
| |
| if (currChild->isFloating() || currChild->isOutOfFlowPositioned()) |
| continue; |
| |
| if (currChild->isTable() || !currChild->isRenderBlock() || (currChild->isBox() && toRenderBox(currChild)->isWritingModeRoot())) |
| break; |
| |
| if (curr->isListItem() && inQuirksMode && currChild->node() && |
| (currChild->node()->hasTagName(ulTag)|| currChild->node()->hasTagName(olTag))) |
| break; |
| |
| RenderObject* lineBox = getParentOfFirstLineBox(toRenderBlock(currChild), marker); |
| if (lineBox) |
| return lineBox; |
| } |
| |
| return 0; |
| } |
| |
| void RenderListItem::updateValue() |
| { |
| if (!m_hasExplicitValue) { |
| m_isValueUpToDate = false; |
| if (m_marker) |
| m_marker->setNeedsLayoutAndPrefWidthsRecalc(); |
| } |
| } |
| |
| static RenderObject* firstNonMarkerChild(RenderObject* parent) |
| { |
| RenderObject* result = parent->firstChild(); |
| while (result && result->isListMarker()) |
| result = result->nextSibling(); |
| return result; |
| } |
| |
| void RenderListItem::updateMarkerLocation() |
| { |
| // Sanity check the location of our marker. |
| if (m_marker) { |
| RenderObject* markerPar = m_marker->parent(); |
| RenderObject* lineBoxParent = getParentOfFirstLineBox(this, m_marker); |
| if (!lineBoxParent) { |
| // 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 (markerPar && markerPar->isAnonymousBlock()) |
| lineBoxParent = markerPar; |
| else |
| lineBoxParent = this; |
| } |
| |
| if (markerPar != lineBoxParent || m_marker->preferredLogicalWidthsDirty()) { |
| // Removing and adding the marker can trigger repainting in |
| // containers other than ourselves, so we need to disable LayoutState. |
| LayoutStateDisabler layoutStateDisabler(view()); |
| updateFirstLetter(); |
| m_marker->remove(); |
| if (!lineBoxParent) |
| lineBoxParent = this; |
| lineBoxParent->addChild(m_marker, firstNonMarkerChild(lineBoxParent)); |
| if (m_marker->preferredLogicalWidthsDirty()) |
| m_marker->computePreferredLogicalWidths(); |
| // If markerPar is an anonymous block that has lost all its children, destroy it. |
| // Extraneous anonymous blocks can cause problems for RenderBlock::updateBeforeAfterContent. |
| if (markerPar && markerPar->isAnonymousBlock() && !markerPar->firstChild() && !toRenderBlock(markerPar)->continuation()) |
| markerPar->destroy(); |
| } |
| } |
| } |
| |
| void RenderListItem::computePreferredLogicalWidths() |
| { |
| ASSERT(preferredLogicalWidthsDirty()); |
| |
| updateMarkerLocation(); |
| |
| RenderBlock::computePreferredLogicalWidths(); |
| } |
| |
| void RenderListItem::layout() |
| { |
| StackStats::LayoutCheckPoint layoutCheckPoint; |
| ASSERT(needsLayout()); |
| |
| updateMarkerLocation(); |
| RenderBlock::layout(); |
| } |
| |
| void RenderListItem::addOverflowFromChildren() |
| { |
| RenderBlock::addOverflowFromChildren(); |
| positionListMarker(); |
| } |
| |
| void RenderListItem::positionListMarker() |
| { |
| if (m_marker && m_marker->parent()->isBox() && !m_marker->isInside() && m_marker->inlineBoxWrapper()) { |
| LayoutUnit markerOldLogicalLeft = m_marker->logicalLeft(); |
| LayoutUnit blockOffset = 0; |
| LayoutUnit lineOffset = 0; |
| for (RenderBox* o = m_marker->parentBox(); o != this; o = o->parentBox()) { |
| blockOffset += o->logicalTop(); |
| lineOffset += o->logicalLeft(); |
| } |
| |
| bool adjustOverflow = false; |
| LayoutUnit markerLogicalLeft; |
| RootInlineBox* root = m_marker->inlineBoxWrapper()->root(); |
| bool hitSelfPaintingLayer = false; |
| |
| RootInlineBox* rootBox = m_marker->inlineBoxWrapper()->root(); |
| LayoutUnit lineTop = rootBox->lineTop(); |
| LayoutUnit lineBottom = rootBox->lineBottom(); |
| |
| // FIXME: Need to account for relative positioning in the layout overflow. |
| if (style()->isLeftToRightDirection()) { |
| LayoutUnit leftLineOffset = logicalLeftOffsetForLine(blockOffset, logicalLeftOffsetForLine(blockOffset, false), false); |
| markerLogicalLeft = leftLineOffset - lineOffset - paddingStart() - borderStart() + m_marker->marginStart(); |
| m_marker->inlineBoxWrapper()->adjustLineDirectionPosition(markerLogicalLeft - markerOldLogicalLeft); |
| for (InlineFlowBox* box = m_marker->inlineBoxWrapper()->parent(); box; box = box->parent()) { |
| LayoutRect newLogicalVisualOverflowRect = box->logicalVisualOverflowRect(lineTop, lineBottom); |
| LayoutRect newLogicalLayoutOverflowRect = box->logicalLayoutOverflowRect(lineTop, lineBottom); |
| if (markerLogicalLeft < newLogicalVisualOverflowRect.x() && !hitSelfPaintingLayer) { |
| newLogicalVisualOverflowRect.setWidth(newLogicalVisualOverflowRect.maxX() - markerLogicalLeft); |
| newLogicalVisualOverflowRect.setX(markerLogicalLeft); |
| if (box == root) |
| adjustOverflow = true; |
| } |
| if (markerLogicalLeft < newLogicalLayoutOverflowRect.x()) { |
| newLogicalLayoutOverflowRect.setWidth(newLogicalLayoutOverflowRect.maxX() - markerLogicalLeft); |
| newLogicalLayoutOverflowRect.setX(markerLogicalLeft); |
| if (box == root) |
| adjustOverflow = true; |
| } |
| box->setOverflowFromLogicalRects(newLogicalLayoutOverflowRect, newLogicalVisualOverflowRect, lineTop, lineBottom); |
| if (box->boxModelObject()->hasSelfPaintingLayer()) |
| hitSelfPaintingLayer = true; |
| } |
| } else { |
| markerLogicalLeft = m_marker->logicalLeft() + paddingStart() + borderStart() + m_marker->marginEnd(); |
| LayoutUnit rightLineOffset = logicalRightOffsetForLine(blockOffset, logicalRightOffsetForLine(blockOffset, false), false); |
| markerLogicalLeft = rightLineOffset - lineOffset + paddingStart() + borderStart() + m_marker->marginEnd(); |
| m_marker->inlineBoxWrapper()->adjustLineDirectionPosition(markerLogicalLeft - markerOldLogicalLeft); |
| for (InlineFlowBox* box = m_marker->inlineBoxWrapper()->parent(); box; box = box->parent()) { |
| LayoutRect newLogicalVisualOverflowRect = box->logicalVisualOverflowRect(lineTop, lineBottom); |
| LayoutRect newLogicalLayoutOverflowRect = box->logicalLayoutOverflowRect(lineTop, lineBottom); |
| if (markerLogicalLeft + m_marker->logicalWidth() > newLogicalVisualOverflowRect.maxX() && !hitSelfPaintingLayer) { |
| newLogicalVisualOverflowRect.setWidth(markerLogicalLeft + m_marker->logicalWidth() - newLogicalVisualOverflowRect.x()); |
| if (box == root) |
| adjustOverflow = true; |
| } |
| if (markerLogicalLeft + m_marker->logicalWidth() > newLogicalLayoutOverflowRect.maxX()) { |
| newLogicalLayoutOverflowRect.setWidth(markerLogicalLeft + m_marker->logicalWidth() - newLogicalLayoutOverflowRect.x()); |
| if (box == root) |
| adjustOverflow = true; |
| } |
| box->setOverflowFromLogicalRects(newLogicalLayoutOverflowRect, newLogicalVisualOverflowRect, lineTop, lineBottom); |
| |
| if (box->boxModelObject()->hasSelfPaintingLayer()) |
| hitSelfPaintingLayer = true; |
| } |
| } |
| |
| if (adjustOverflow) { |
| LayoutRect markerRect(markerLogicalLeft + lineOffset, blockOffset, m_marker->width(), m_marker->height()); |
| if (!style()->isHorizontalWritingMode()) |
| markerRect = markerRect.transposedRect(); |
| RenderBox* o = m_marker; |
| bool propagateVisualOverflow = true; |
| bool propagateLayoutOverflow = true; |
| do { |
| o = o->parentBox(); |
| if (o->hasOverflowClip()) |
| propagateVisualOverflow = false; |
| if (o->isRenderBlock()) { |
| if (propagateVisualOverflow) |
| toRenderBlock(o)->addVisualOverflow(markerRect); |
| if (propagateLayoutOverflow) |
| toRenderBlock(o)->addLayoutOverflow(markerRect); |
| } |
| if (o->hasOverflowClip()) |
| propagateLayoutOverflow = false; |
| if (o->hasSelfPaintingLayer()) |
| propagateVisualOverflow = false; |
| markerRect.moveBy(-o->location()); |
| } while (o != this && propagateVisualOverflow && propagateLayoutOverflow); |
| } |
| } |
| } |
| |
| void RenderListItem::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| if (!logicalHeight() && hasOverflowClip()) |
| return; |
| |
| RenderBlock::paint(paintInfo, paintOffset); |
| } |
| |
| const String& RenderListItem::markerText() const |
| { |
| if (m_marker) |
| return m_marker->text(); |
| DEFINE_STATIC_LOCAL(String, staticNullString, ()); |
| return staticNullString; |
| } |
| |
| String RenderListItem::markerTextWithSuffix() const |
| { |
| if (!m_marker) |
| return String(); |
| |
| // Append the suffix for the marker in the right place depending |
| // on the direction of the text (right-to-left or left-to-right). |
| |
| const String& markerText = m_marker->text(); |
| const String markerSuffix = m_marker->suffix(); |
| StringBuilder result; |
| |
| if (!m_marker->style()->isLeftToRightDirection()) |
| result.append(markerSuffix); |
| |
| result.append(markerText); |
| |
| if (m_marker->style()->isLeftToRightDirection()) |
| result.append(markerSuffix); |
| |
| return result.toString(); |
| } |
| |
| void RenderListItem::explicitValueChanged() |
| { |
| if (m_marker) |
| m_marker->setNeedsLayoutAndPrefWidthsRecalc(); |
| Node* listNode = enclosingList(this); |
| RenderObject* listRenderer = 0; |
| if (listNode) |
| listRenderer = listNode->renderer(); |
| for (RenderListItem* item = this; item; item = nextListItem(listRenderer, item)) |
| item->updateValue(); |
| } |
| |
| void RenderListItem::setExplicitValue(int value) |
| { |
| ASSERT(node()); |
| |
| if (m_hasExplicitValue && m_explicitValue == value) |
| return; |
| m_explicitValue = value; |
| m_value = value; |
| m_hasExplicitValue = true; |
| explicitValueChanged(); |
| } |
| |
| void RenderListItem::clearExplicitValue() |
| { |
| ASSERT(node()); |
| |
| if (!m_hasExplicitValue) |
| return; |
| m_hasExplicitValue = false; |
| m_isValueUpToDate = false; |
| explicitValueChanged(); |
| } |
| |
| static RenderListItem* previousOrNextItem(bool isListReversed, RenderObject* list, RenderListItem* item) |
| { |
| return isListReversed ? previousListItem(list, item) : RenderListItem::nextListItem(list, item); |
| } |
| |
| void RenderListItem::updateListMarkerNumbers() |
| { |
| Node* listNode = enclosingList(this); |
| ASSERT(listNode && listNode->renderer()); |
| if (!listNode || !listNode->renderer()) |
| return; |
| |
| bool isListReversed = false; |
| RenderObject* list = listNode->renderer(); |
| HTMLOListElement* oListElement = (listNode && listNode->hasTagName(olTag)) ? static_cast<HTMLOListElement*>(listNode) : 0; |
| if (oListElement) { |
| oListElement->itemCountChanged(); |
| isListReversed = oListElement->isReversed(); |
| } |
| for (RenderListItem* item = previousOrNextItem(isListReversed, list, this); item; item = previousOrNextItem(isListReversed, list, item)) { |
| if (!item->m_isValueUpToDate) { |
| // If an item has been marked for update before, we can safely |
| // assume that all the following ones have too. |
| // This gives us the opportunity to stop here and avoid |
| // marking the same nodes again. |
| break; |
| } |
| item->updateValue(); |
| } |
| } |
| |
| } // namespace WebCore |
