| /** |
| * This file is part of the DOM implementation for KDE. |
| * |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc. |
| * 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" |
| |
| 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::setStyle(RenderStyle* newStyle) |
| { |
| RenderBlock::setStyle(newStyle); |
| |
| if (style()->listStyleType() != LNONE || |
| (style()->listStyleImage() && !style()->listStyleImage()->errorOccurred())) { |
| RenderStyle* newStyle = new (renderArena()) RenderStyle; |
| newStyle->ref(); |
| // 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); |
| newStyle->deref(renderArena()); |
| } else if (m_marker) { |
| m_marker->destroy(); |
| m_marker = 0; |
| } |
| } |
| |
| void RenderListItem::destroy() |
| { |
| if (m_marker) { |
| m_marker->destroy(); |
| m_marker = 0; |
| } |
| RenderBlock::destroy(); |
| } |
| |
| static Node* enclosingList(Node* node) |
| { |
| Node* parent = node->parentNode(); |
| for (Node* n = parent; n; n = n->parentNode()) |
| if (n->hasTagName(ulTag) || n->hasTagName(olTag)) |
| return n; |
| // If there's no actual <ul> or <ol> list element, then our parent acts as |
| // our list for purposes of determining what other list items should be |
| // numbered as part of the same list. |
| return parent; |
| } |
| |
| static RenderListItem* previousListItem(Node* list, const RenderListItem* item) |
| { |
| for (Node* n = item->node()->traversePreviousNode(); n != list; n = n->traversePreviousNode()) { |
| RenderObject* o = n->renderer(); |
| if (o && o->isListItem()) { |
| Node* otherList = enclosingList(n); |
| // This item is part of our current list, so it's what we're looking for. |
| if (list == otherList) |
| return static_cast<RenderListItem*>(o); |
| // We found ourself inside another list; lets skip the rest of it. |
| // Use traverseNextNode() 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 traversePreviousNode() that will be done by the loop. |
| if (otherList) |
| n = otherList->traverseNextNode(); |
| } |
| } |
| return 0; |
| } |
| |
| inline int RenderListItem::calcValue() const |
| { |
| if (m_hasExplicitValue) |
| return m_explicitValue; |
| Node* list = enclosingList(node()); |
| // 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() + 1; |
| if (list && list->hasTagName(olTag)) |
| return static_cast<HTMLOListElement*>(list)->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; |
| |
| for (RenderObject* currChild = firstChild; currChild; currChild = currChild->nextSibling()) { |
| if (currChild == marker) |
| continue; |
| |
| if (currChild->isInline() && (!currChild->isInlineFlow() || curr->generatesLineBoxesForInlineChild(currChild))) |
| return curr; |
| |
| if (currChild->isFloating() || currChild->isPositioned()) |
| continue; |
| |
| if (currChild->isTable() || !currChild->isRenderBlock()) |
| break; |
| |
| if (curr->isListItem() && currChild->style()->htmlHacks() && currChild->element() && |
| (currChild->element()->hasTagName(ulTag)|| currChild->element()->hasTagName(olTag))) |
| break; |
| |
| RenderObject* lineBox = getParentOfFirstLineBox(static_cast<RenderBlock*>(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->prefWidthsDirty()) { |
| // Removing and adding the marker can trigger repainting in |
| // containers other than ourselves, so we need to disable LayoutState. |
| view()->disableLayoutState(); |
| updateFirstLetter(); |
| m_marker->remove(); |
| if (!lineBoxParent) |
| lineBoxParent = this; |
| lineBoxParent->addChild(m_marker, firstNonMarkerChild(lineBoxParent)); |
| if (m_marker->prefWidthsDirty()) |
| m_marker->calcPrefWidths(); |
| view()->enableLayoutState(); |
| } |
| } |
| } |
| |
| void RenderListItem::calcPrefWidths() |
| { |
| ASSERT(prefWidthsDirty()); |
| |
| updateMarkerLocation(); |
| |
| RenderBlock::calcPrefWidths(); |
| } |
| |
| void RenderListItem::layout() |
| { |
| ASSERT(needsLayout()); |
| |
| updateMarkerLocation(); |
| RenderBlock::layout(); |
| } |
| |
| void RenderListItem::positionListMarker() |
| { |
| if (m_marker && !m_marker->isInside() && m_marker->inlineBoxWrapper()) { |
| int markerOldX = m_marker->xPos(); |
| int yOffset = 0; |
| int xOffset = 0; |
| for (RenderObject* o = m_marker->parent(); o != this; o = o->parent()) { |
| yOffset += o->yPos(); |
| xOffset += o->xPos(); |
| } |
| |
| bool adjustOverflow = false; |
| int markerXPos; |
| RootInlineBox* root = m_marker->inlineBoxWrapper()->root(); |
| |
| if (style()->direction() == LTR) { |
| int leftLineOffset = leftRelOffset(yOffset, leftOffset(yOffset)); |
| markerXPos = leftLineOffset - xOffset - paddingLeft() - borderLeft() + m_marker->marginLeft(); |
| m_marker->inlineBoxWrapper()->adjustPosition(markerXPos - markerOldX, 0); |
| if (markerXPos < root->leftOverflow()) { |
| root->setHorizontalOverflowPositions(markerXPos, root->rightOverflow()); |
| adjustOverflow = true; |
| } |
| } else { |
| int rightLineOffset = rightRelOffset(yOffset, rightOffset(yOffset)); |
| markerXPos = rightLineOffset - xOffset + paddingRight() + borderRight() + m_marker->marginLeft(); |
| m_marker->inlineBoxWrapper()->adjustPosition(markerXPos - markerOldX, 0); |
| if (markerXPos + m_marker->width() > root->rightOverflow()) { |
| root->setHorizontalOverflowPositions(root->leftOverflow(), markerXPos + m_marker->width()); |
| adjustOverflow = true; |
| } |
| } |
| |
| if (adjustOverflow) { |
| IntRect markerRect(markerXPos + xOffset, yOffset, m_marker->width(), m_marker->height()); |
| RenderObject* o = m_marker; |
| do { |
| o = o->parent(); |
| if (o->isRenderBlock()) |
| static_cast<RenderBlock*>(o)->addVisualOverflow(markerRect); |
| markerRect.move(-o->xPos(), -o->yPos()); |
| } while (o != this); |
| } |
| } |
| } |
| |
| void RenderListItem::paint(PaintInfo& paintInfo, int tx, int ty) |
| { |
| if (!m_height) |
| return; |
| |
| RenderBlock::paint(paintInfo, tx, ty); |
| } |
| |
| const String& RenderListItem::markerText() const |
| { |
| if (m_marker) |
| return m_marker->text(); |
| static String staticNullString; |
| return staticNullString; |
| } |
| |
| void RenderListItem::explicitValueChanged() |
| { |
| if (m_marker) |
| m_marker->setNeedsLayoutAndPrefWidthsRecalc(); |
| Node* listNode = enclosingList(node()); |
| RenderObject* listRenderer = 0; |
| if (listNode) |
| listRenderer = listNode->renderer(); |
| for (RenderObject* r = this; r; r = r->nextInPreOrder(listRenderer)) |
| if (r->isListItem()) { |
| RenderListItem* item = static_cast<RenderListItem*>(r); |
| if (!item->m_hasExplicitValue) { |
| item->m_isValueUpToDate = false; |
| if (RenderListMarker* marker = item->m_marker) |
| marker->setNeedsLayoutAndPrefWidthsRecalc(); |
| } |
| } |
| } |
| |
| void RenderListItem::setExplicitValue(int value) |
| { |
| if (m_hasExplicitValue && m_explicitValue == value) |
| return; |
| m_explicitValue = value; |
| m_value = value; |
| m_hasExplicitValue = true; |
| explicitValueChanged(); |
| } |
| |
| void RenderListItem::clearExplicitValue() |
| { |
| if (!m_hasExplicitValue) |
| return; |
| m_hasExplicitValue = false; |
| m_isValueUpToDate = false; |
| explicitValueChanged(); |
| } |
| |
| } // namespace WebCore |
