| /** |
| * 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 "core/rendering/RenderListItem.h" |
| |
| #include "HTMLNames.h" |
| #include "core/dom/ElementTraversal.h" |
| #include "core/html/HTMLOListElement.h" |
| #include "core/rendering/RenderListMarker.h" |
| #include "core/rendering/RenderView.h" |
| #include "wtf/StdLibExtras.h" |
| #include "wtf/text/StringBuilder.h" |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| RenderListItem::RenderListItem(Element* element) |
| : RenderBlockFlow(element) |
| , 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(); |
| // Markers update their own margin style. By copying the existing style we can |
| // avoid an unnecessary layout in setStyle below. |
| if (m_marker) |
| newStyle->copyNonInheritedFrom(m_marker->style()); |
| // 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 = RenderListMarker::createAnonymous(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; |
| } |
| RenderBlockFlow::willBeDestroyed(); |
| } |
| |
| void RenderListItem::insertedIntoTree() |
| { |
| RenderBlock::insertedIntoTree(); |
| |
| updateListMarkerNumbers(); |
| } |
| |
| void RenderListItem::willBeRemovedFromTree() |
| { |
| RenderBlockFlow::willBeRemovedFromTree(); |
| |
| updateListMarkerNumbers(); |
| } |
| |
| static bool isList(const Node* node) |
| { |
| return (node->hasTagName(ulTag) || node->hasTagName(olTag)); |
| } |
| |
| // Returns the enclosing list with respect to the DOM order. |
| static Node* enclosingList(const RenderListItem* listItem) |
| { |
| Node* listItemNode = listItem->node(); |
| Node* firstNode = 0; |
| // We use parentNode because the enclosing list could be a ShadowRoot that's not Element. |
| for (Node* parent = listItemNode->parentNode(); parent; parent = parent->parentNode()) { |
| if (isList(parent)) |
| return parent; |
| if (!firstNode) |
| firstNode = parent; |
| } |
| |
| // 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; |
| } |
| |
| // Returns the next list item with respect to the DOM order. |
| static RenderListItem* nextListItem(const Node* listNode, const RenderListItem* item = 0) |
| { |
| if (!listNode) |
| return 0; |
| |
| const Node* current = item ? item->node() : listNode; |
| current = ElementTraversal::nextIncludingPseudo(current, listNode); |
| |
| while (current) { |
| if (isList(current)) { |
| // We've found a nested, independent list: nothing to do here. |
| current = ElementTraversal::nextIncludingPseudoSkippingChildren(current, listNode); |
| continue; |
| } |
| |
| RenderObject* renderer = current->renderer(); |
| if (renderer && renderer->isListItem()) |
| return toRenderListItem(renderer); |
| |
| // FIXME: Can this be optimized to skip the children of the elements without a renderer? |
| current = ElementTraversal::nextIncludingPseudo(current, listNode); |
| } |
| |
| return 0; |
| } |
| |
| // Returns the previous list item with respect to the DOM order. |
| static RenderListItem* previousListItem(const Node* listNode, const RenderListItem* item) |
| { |
| Node* current = item->node(); |
| for (current = ElementTraversal::previousIncludingPseudo(current, listNode); current; current = ElementTraversal::previousIncludingPseudo(current, listNode)) { |
| RenderObject* renderer = current->renderer(); |
| if (!renderer || (renderer && !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 (listNode == otherList) |
| return toRenderListItem(renderer); |
| // We found ourself inside another list; lets skip the rest of it. |
| // Use nextIncludingPseudo() 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 previousIncludingPseudo() that will be done by the loop. |
| if (otherList) |
| current = ElementTraversal::nextIncludingPseudo(otherList); |
| } |
| return 0; |
| } |
| |
| void RenderListItem::updateItemValuesForOrderedList(const HTMLOListElement* listNode) |
| { |
| ASSERT(listNode); |
| |
| for (RenderListItem* listItem = nextListItem(listNode); listItem; listItem = nextListItem(listNode, listItem)) |
| listItem->updateValue(); |
| } |
| |
| unsigned RenderListItem::itemCountForOrderedList(const HTMLOListElement* listNode) |
| { |
| ASSERT(listNode); |
| |
| unsigned itemCount = 0; |
| for (RenderListItem* listItem = nextListItem(listNode); listItem; listItem = nextListItem(listNode, listItem)) |
| itemCount++; |
| |
| return itemCount; |
| } |
| |
| inline int RenderListItem::calcValue() const |
| { |
| if (m_hasExplicitValue) |
| return m_explicitValue; |
| |
| Node* list = enclosingList(this); |
| HTMLOListElement* oListElement = (list && list->hasTagName(olTag)) ? toHTMLOListElement(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(list, 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* markerParent = 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 (markerParent && markerParent->isAnonymousBlock()) |
| lineBoxParent = markerParent; |
| else |
| lineBoxParent = this; |
| } |
| |
| if (markerParent != 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 (markerParent) |
| markerParent->dirtyLinesFromChangedChild(m_marker); |
| if (!lineBoxParent) |
| lineBoxParent = this; |
| lineBoxParent->addChild(m_marker, firstNonMarkerChild(lineBoxParent)); |
| m_marker->updateMarginsAndContent(); |
| // If markerParent is an anonymous block that has lost all its children, destroy it. |
| if (markerParent && markerParent->isAnonymousBlock() && !markerParent->firstChild() && !toRenderBlock(markerParent)->continuation()) |
| markerParent->destroy(); |
| |
| // If the marker is inside we need to redo the preferred width calculations |
| // as the size of the item now includes the size of the list marker. |
| if (m_marker->isInside()) |
| containingBlock()->updateLogicalWidth(); |
| } |
| } |
| } |
| |
| void RenderListItem::layout() |
| { |
| ASSERT(needsLayout()); |
| |
| updateMarkerLocation(); |
| RenderBlockFlow::layout(); |
| } |
| |
| void RenderListItem::addOverflowFromChildren() |
| { |
| RenderBlockFlow::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 { |
| 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->isRenderBlock()) { |
| if (propagateVisualOverflow) |
| toRenderBlock(o)->addContentsVisualOverflow(markerRect); |
| if (propagateLayoutOverflow) |
| toRenderBlock(o)->addLayoutOverflow(markerRect); |
| } |
| if (o->hasOverflowClip()) { |
| propagateLayoutOverflow = false; |
| propagateVisualOverflow = 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; |
| |
| RenderBlockFlow::paint(paintInfo, paintOffset); |
| } |
| |
| const String& RenderListItem::markerText() const |
| { |
| if (m_marker) |
| return m_marker->text(); |
| return nullAtom.string(); |
| } |
| |
| 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); |
| for (RenderListItem* item = this; item; item = nextListItem(listNode, 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, Node* list, RenderListItem* item) |
| { |
| return isListReversed ? previousListItem(list, item) : nextListItem(list, item); |
| } |
| |
| void RenderListItem::updateListMarkerNumbers() |
| { |
| Node* listNode = enclosingList(this); |
| // The list node can be the shadow root which has no renderer. |
| ASSERT(listNode); |
| if (!listNode) |
| return; |
| |
| bool isListReversed = false; |
| HTMLOListElement* oListElement = (listNode && listNode->hasTagName(olTag)) ? toHTMLOListElement(listNode) : 0; |
| if (oListElement) { |
| oListElement->itemCountChanged(); |
| isListReversed = oListElement->isReversed(); |
| } |
| for (RenderListItem* item = previousOrNextItem(isListReversed, listNode, this); item; item = previousOrNextItem(isListReversed, listNode, 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 |
