| /* |
| * Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com) |
| * Copyright (C) 2006-2018 Apple Inc. All rights reserved. |
| * |
| * 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 "RenderCounter.h" |
| |
| #include "CounterNode.h" |
| #include "Document.h" |
| #include "Element.h" |
| #include "ElementInlines.h" |
| #include "ElementTraversal.h" |
| #include "HTMLNames.h" |
| #include "HTMLOListElement.h" |
| #include "PseudoElement.h" |
| #include "RenderListItem.h" |
| #include "RenderListMarker.h" |
| #include "RenderStyle.h" |
| #include "RenderView.h" |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/StdLibExtras.h> |
| |
| #if ENABLE(TREE_DEBUGGING) |
| #include <stdio.h> |
| #endif |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderCounter); |
| |
| using CounterMap = HashMap<AtomString, Ref<CounterNode>>; |
| using CounterMaps = HashMap<const RenderElement*, std::unique_ptr<CounterMap>>; |
| |
| static CounterNode* makeCounterNode(RenderElement&, const AtomString& identifier, bool alwaysCreateCounter); |
| |
| static CounterMaps& counterMaps() |
| { |
| static NeverDestroyed<CounterMaps> staticCounterMaps; |
| return staticCounterMaps; |
| } |
| |
| static Element* ancestorStyleContainmentObject(const Element& element) |
| { |
| Element* ancestor = is<PseudoElement>(element) ? downcast<PseudoElement>(element).hostElement() : element.parentElement(); |
| while (ancestor) { |
| if (auto* style = ancestor->existingComputedStyle()) { |
| if (style->containsStyle()) |
| break; |
| } |
| // FIXME: this should use parentInComposedTree but for now matches the rest of RenderCounter. |
| ancestor = ancestor->parentElement(); |
| } |
| return ancestor; |
| } |
| |
| // This function processes the renderer tree in the order of the DOM tree |
| // including pseudo elements as defined in CSS 2.1. |
| static RenderElement* previousInPreOrder(const RenderElement& renderer) |
| { |
| ASSERT(renderer.element()); |
| Element* previous = ElementTraversal::previousIncludingPseudo(*renderer.element()); |
| Element* styleContainAncestor = ancestorStyleContainmentObject(*renderer.element()); |
| |
| while (previous && !previous->renderer()) |
| previous = ElementTraversal::previousIncludingPseudo(*previous, styleContainAncestor); |
| if (!previous) |
| return nullptr; |
| return previous->renderer(); |
| } |
| |
| static inline Element* parentOrPseudoHostElement(const RenderElement& renderer) |
| { |
| if (renderer.isPseudoElement()) |
| return renderer.generatingElement(); |
| return renderer.element() ? renderer.element()->parentElement() : nullptr; |
| } |
| |
| static Element* previousSiblingOrParentElement(const Element& element) |
| { |
| if (auto* previous = ElementTraversal::pseudoAwarePreviousSibling(element)) { |
| while (previous && !previous->renderer()) |
| previous = ElementTraversal::pseudoAwarePreviousSibling(*previous); |
| |
| if (previous) |
| return previous; |
| } |
| |
| if (is<PseudoElement>(element)) { |
| auto* hostElement = downcast<PseudoElement>(element).hostElement(); |
| ASSERT(hostElement); |
| if (hostElement->renderer()) |
| return hostElement; |
| return previousSiblingOrParentElement(*hostElement); |
| } |
| |
| auto* parent = element.parentElement(); |
| if (parent && !parent->renderer()) |
| parent = previousSiblingOrParentElement(*parent); |
| if (parent && parent->renderer() && parent->renderer()->style().containsStyle()) |
| return nullptr; |
| return parent; |
| } |
| |
| // This function processes the renderer tree in the order of the DOM tree |
| // including pseudo elements as defined in CSS 2.1. |
| static RenderElement* previousSiblingOrParent(const RenderElement& renderer) |
| { |
| ASSERT(renderer.element()); |
| |
| auto* previous = previousSiblingOrParentElement(*renderer.element()); |
| return previous ? previous->renderer() : nullptr; |
| } |
| |
| static inline bool areRenderersElementsSiblings(const RenderElement& first, const RenderElement& second) |
| { |
| return parentOrPseudoHostElement(first) == parentOrPseudoHostElement(second); |
| } |
| |
| // This function processes the renderer tree in the order of the DOM tree |
| // including pseudo elements as defined in CSS 2.1. |
| static RenderElement* nextInPreOrder(const RenderElement& renderer, const Element* stayWithin, bool skipDescendants = false) |
| { |
| ASSERT(renderer.element()); |
| Element& self = *renderer.element(); |
| Element* next = skipDescendants ? ElementTraversal::nextIncludingPseudoSkippingChildren(self, stayWithin) : ElementTraversal::nextIncludingPseudo(self, stayWithin); |
| while (next && !next->renderer()) |
| next = skipDescendants ? ElementTraversal::nextIncludingPseudoSkippingChildren(*next, stayWithin) : ElementTraversal::nextIncludingPseudo(*next, stayWithin); |
| return next ? next->renderer() : nullptr; |
| } |
| |
| static CounterDirectives listItemCounterDirectives(RenderElement& renderer) |
| { |
| if (is<RenderListItem>(renderer)) { |
| auto& item = downcast<RenderListItem>(renderer); |
| if (auto explicitValue = item.explicitValue()) |
| return { *explicitValue, std::nullopt }; |
| return { std::nullopt, item.isInReversedOrderedList() ? -1 : 1 }; |
| } |
| if (auto element = renderer.element()) { |
| if (is<HTMLOListElement>(*element)) { |
| auto& list = downcast<HTMLOListElement>(*element); |
| return { list.start(), list.isReversed() ? 1 : -1 }; |
| } |
| if (isHTMLListElement(*element)) |
| return { 0, std::nullopt }; |
| } |
| return { }; |
| } |
| |
| struct CounterPlan { |
| bool isReset; |
| int value; |
| }; |
| |
| static std::optional<CounterPlan> planCounter(RenderElement& renderer, const AtomString& identifier) |
| { |
| // We must have a generating node or else we cannot have a counter. |
| Element* generatingElement = renderer.generatingElement(); |
| if (!generatingElement) |
| return std::nullopt; |
| |
| auto& style = renderer.style(); |
| |
| switch (style.styleType()) { |
| case PseudoId::None: |
| // Sometimes elements have more then one renderer. Only the first one gets the counter |
| // LayoutTests/http/tests/css/counter-crash.html |
| if (generatingElement->renderer() != &renderer) |
| return std::nullopt; |
| break; |
| case PseudoId::Before: |
| case PseudoId::After: |
| break; |
| default: |
| return std::nullopt; // Counters are forbidden from all other pseudo elements. |
| } |
| |
| CounterDirectives directives; |
| |
| if (auto map = style.counterDirectives()) |
| directives = map->get(identifier); |
| |
| if (identifier == "list-item"_s) { |
| auto itemDirectives = listItemCounterDirectives(renderer); |
| if (!directives.resetValue) |
| directives.resetValue = itemDirectives.resetValue; |
| if (!directives.incrementValue) |
| directives.incrementValue = itemDirectives.incrementValue; |
| } |
| |
| if (directives.resetValue) |
| return CounterPlan { true, saturatedSum<int>(*directives.resetValue, directives.incrementValue.value_or(0)) }; |
| if (directives.incrementValue) |
| return CounterPlan { false, *directives.incrementValue }; |
| return std::nullopt; |
| } |
| |
| // - Finds the insertion point for the counter described by counterOwner, isReset and |
| // identifier in the CounterNode tree for identifier and sets parent and |
| // previousSibling accordingly. |
| // - The function returns true if the counter whose insertion point is searched is NOT |
| // the root of the tree. |
| // - The root of the tree is a counter reference that is not in the scope of any other |
| // counter with the same identifier. |
| // - All the counter references with the same identifier as this one that are in |
| // children or subsequent siblings of the renderer that owns the root of the tree |
| // form the rest of of the nodes of the tree. |
| // - The root of the tree is always a reset type reference. |
| // - A subtree rooted at any reset node in the tree is equivalent to all counter |
| // references that are in the scope of the counter or nested counter defined by that |
| // reset node. |
| // - Non-reset CounterNodes cannot have descendants. |
| |
| struct CounterInsertionPoint { |
| RefPtr<CounterNode> parent; |
| RefPtr<CounterNode> previousSibling; |
| }; |
| |
| static CounterInsertionPoint findPlaceForCounter(RenderElement& counterOwner, const AtomString& identifier, bool isReset) |
| { |
| // We cannot stop searching for counters with the same identifier before we also |
| // check this renderer, because it may affect the positioning in the tree of our counter. |
| RenderElement* searchEndRenderer = previousSiblingOrParent(counterOwner); |
| // We check renderers in preOrder from the renderer that our counter is attached to |
| // towards the begining of the document for counters with the same identifier as the one |
| // we are trying to find a place for. This is the next renderer to be checked. |
| RenderElement* currentRenderer = previousInPreOrder(counterOwner); |
| RefPtr<CounterNode> previousSibling; |
| |
| while (currentRenderer) { |
| auto currentCounter = makeCounterNode(*currentRenderer, identifier, false); |
| if (searchEndRenderer == currentRenderer) { |
| // We may be at the end of our search. |
| if (currentCounter) { |
| // We have a suitable counter on the EndSearchRenderer. |
| if (previousSibling) { |
| // But we already found another counter that we come after. |
| if (currentCounter->actsAsReset()) { |
| // We found a reset counter that is on a renderer that is a sibling of ours or a parent. |
| if (isReset && areRenderersElementsSiblings(*currentRenderer, counterOwner)) { |
| // We are also a reset counter and the previous reset was on a sibling renderer |
| // hence we are the next sibling of that counter if that reset is not a root or |
| // we are a root node if that reset is a root. |
| auto* parent = currentCounter->parent(); |
| return { parent, parent ? currentCounter : nullptr }; |
| } |
| // We are not a reset node or the previous reset must be on an ancestor of our owner renderer |
| // hence we must be a child of that reset counter. |
| // In some cases renders can be reparented (ex. nodes inside a table but not in a column or row). |
| // In these cases the identified previousSibling will be invalid as its parent is different from |
| // our identified parent. |
| if (previousSibling->parent() != currentCounter) |
| previousSibling = nullptr; |
| return { currentCounter, WTFMove(previousSibling) }; |
| } |
| // CurrentCounter, the counter at the EndSearchRenderer, is not reset. |
| if (!isReset || !areRenderersElementsSiblings(*currentRenderer, counterOwner)) { |
| // If the node we are placing is not reset or we have found a counter that is attached |
| // to an ancestor of the placed counter's owner renderer we know we are a sibling of that node. |
| if (currentCounter->parent() != previousSibling->parent()) |
| return { }; |
| return { currentCounter->parent(), WTFMove(previousSibling) }; |
| } |
| } else { |
| // We are at the potential end of the search, but we had no previous sibling candidate |
| // In this case we follow pretty much the same logic as above but no ASSERTs about |
| // previousSibling, and when we are a sibling of the end counter we must set previousSibling |
| // to currentCounter. |
| if (currentCounter->actsAsReset()) { |
| if (isReset && areRenderersElementsSiblings(*currentRenderer, counterOwner)) |
| return { currentCounter->parent(), currentCounter }; |
| return { currentCounter, WTFMove(previousSibling) }; |
| } |
| if (!isReset || !areRenderersElementsSiblings(*currentRenderer, counterOwner)) |
| return { currentCounter->parent(), currentCounter }; |
| previousSibling = currentCounter; |
| } |
| } |
| // We come here if the previous sibling or parent of our owner renderer had no |
| // good counter, or we are a reset node and the counter on the previous sibling |
| // of our owner renderer was not a reset counter. |
| // Set a new goal for the end of the search. |
| searchEndRenderer = previousSiblingOrParent(*currentRenderer); |
| } else { |
| // We are searching descendants of a previous sibling of the renderer that the |
| // counter being placed is attached to. |
| if (currentCounter) { |
| // We found a suitable counter. |
| if (previousSibling) { |
| // Since we had a suitable previous counter before, we should only consider this one as our |
| // previousSibling if it is a reset counter and hence the current previousSibling is its child. |
| if (currentCounter->actsAsReset()) { |
| previousSibling = currentCounter; |
| // We are no longer interested in previous siblings of the currentRenderer or their children |
| // as counters they may have attached cannot be the previous sibling of the counter we are placing. |
| auto* parent = parentOrPseudoHostElement(*currentRenderer); |
| currentRenderer = parent ? parent->renderer() : nullptr; |
| continue; |
| } |
| } else |
| previousSibling = currentCounter; |
| currentRenderer = previousSiblingOrParent(*currentRenderer); |
| continue; |
| } |
| } |
| // This function is designed so that the same test is not done twice in an iteration, except for this one |
| // which may be done twice in some cases. Rearranging the decision points though, to accommodate this |
| // performance improvement would create more code duplication than is worthwhile in my oppinion and may further |
| // impede the readability of this already complex algorithm. |
| if (previousSibling) |
| currentRenderer = previousSiblingOrParent(*currentRenderer); |
| else |
| currentRenderer = previousInPreOrder(*currentRenderer); |
| } |
| return { }; |
| } |
| |
| static CounterNode* makeCounterNode(RenderElement& renderer, const AtomString& identifier, bool alwaysCreateCounter) |
| { |
| if (renderer.hasCounterNodeMap()) { |
| ASSERT(counterMaps().contains(&renderer)); |
| if (auto* node = counterMaps().find(&renderer)->value->get(identifier)) |
| return node; |
| } |
| |
| auto plan = planCounter(renderer, identifier); |
| if (!plan && !alwaysCreateCounter) |
| return nullptr; |
| |
| auto& maps = counterMaps(); |
| |
| auto newNode = CounterNode::create(renderer, plan && plan->isReset, plan ? plan->value : 0); |
| |
| auto place = findPlaceForCounter(renderer, identifier, plan && plan->isReset); |
| if (place.parent) |
| place.parent->insertAfter(newNode, place.previousSibling.get(), identifier); |
| |
| maps.add(&renderer, makeUnique<CounterMap>()).iterator->value->add(identifier, newNode.copyRef()); |
| renderer.setHasCounterNodeMap(true); |
| |
| if (newNode->parent() || renderer.shouldApplyStyleContainment()) |
| return newNode.ptr(); |
| |
| // Check if some nodes that were previously root nodes should become children of this node now. |
| auto* currentRenderer = &renderer; |
| auto* stayWithin = parentOrPseudoHostElement(renderer); |
| bool skipDescendants = false; |
| while ((currentRenderer = nextInPreOrder(*currentRenderer, stayWithin, skipDescendants))) { |
| skipDescendants = currentRenderer->shouldApplyStyleContainment(); |
| if (!currentRenderer->hasCounterNodeMap()) |
| continue; |
| auto* currentCounter = maps.find(currentRenderer)->value->get(identifier); |
| if (!currentCounter) |
| continue; |
| skipDescendants = true; |
| if (currentCounter->parent()) |
| continue; |
| if (stayWithin == parentOrPseudoHostElement(*currentRenderer) && currentCounter->hasResetType()) |
| break; |
| newNode->insertAfter(*currentCounter, newNode->lastChild(), identifier); |
| } |
| |
| return newNode.ptr(); |
| } |
| |
| RenderCounter::RenderCounter(Document& document, const CounterContent& counter) |
| : RenderText(document, emptyString()) |
| , m_counter(counter) |
| { |
| view().addRenderCounter(); |
| } |
| |
| RenderCounter::~RenderCounter() |
| { |
| // Do not add any code here. Add it to willBeDestroyed() instead. |
| } |
| |
| void RenderCounter::willBeDestroyed() |
| { |
| view().removeRenderCounter(); |
| |
| if (m_counterNode) { |
| m_counterNode->removeRenderer(*this); |
| ASSERT(!m_counterNode); |
| } |
| |
| RenderText::willBeDestroyed(); |
| } |
| |
| ASCIILiteral RenderCounter::renderName() const |
| { |
| return "RenderCounter"_s; |
| } |
| |
| bool RenderCounter::isCounter() const |
| { |
| return true; |
| } |
| |
| String RenderCounter::originalText() const |
| { |
| if (!m_counterNode) { |
| RenderElement* beforeAfterContainer = parent(); |
| while (true) { |
| if (!beforeAfterContainer) |
| return String(); |
| if (!beforeAfterContainer->isAnonymous() && !beforeAfterContainer->isPseudoElement()) |
| return String(); // RenderCounters are restricted to before and after pseudo elements |
| PseudoId containerStyle = beforeAfterContainer->style().styleType(); |
| if ((containerStyle == PseudoId::Before) || (containerStyle == PseudoId::After)) |
| break; |
| beforeAfterContainer = beforeAfterContainer->parent(); |
| } |
| makeCounterNode(*beforeAfterContainer, m_counter.identifier(), true)->addRenderer(const_cast<RenderCounter&>(*this)); |
| ASSERT(m_counterNode); |
| } |
| CounterNode* child = m_counterNode; |
| int value = child->actsAsReset() ? child->value() : child->countInParent(); |
| |
| String text = listMarkerText(m_counter.listStyle(), value); |
| |
| if (!m_counter.separator().isNull()) { |
| if (!child->actsAsReset()) |
| child = child->parent(); |
| while (CounterNode* parent = child->parent()) { |
| text = listMarkerText(m_counter.listStyle(), child->countInParent()) |
| + m_counter.separator() + text; |
| child = parent; |
| } |
| } |
| |
| return text; |
| } |
| |
| void RenderCounter::updateCounter() |
| { |
| computePreferredLogicalWidths(0); |
| } |
| |
| void RenderCounter::computePreferredLogicalWidths(float lead) |
| { |
| // FIXME: We shouldn't be modifying the tree in computePreferredLogicalWidths. |
| // Instead, we should properly hook the appropriate changes in the DOM and modify |
| // the render tree then. When that's done, we also won't need to override |
| // computePreferredLogicalWidths at all. |
| // https://bugs.webkit.org/show_bug.cgi?id=104829 |
| SetLayoutNeededForbiddenScope layoutForbiddenScope(*this, false); |
| |
| setRenderedText(originalText()); |
| |
| RenderText::computePreferredLogicalWidths(lead); |
| } |
| |
| static void destroyCounterNodeWithoutMapRemoval(const AtomString& identifier, CounterNode& node) |
| { |
| RefPtr<CounterNode> previous; |
| for (RefPtr<CounterNode> child = node.lastDescendant(); child && child != &node; child = WTFMove(previous)) { |
| previous = child->previousInPreOrder(); |
| child->parent()->removeChild(*child); |
| ASSERT(counterMaps().find(&child->owner())->value->get(identifier) == child); |
| counterMaps().find(&child->owner())->value->remove(identifier); |
| } |
| if (auto* parent = node.parent()) |
| parent->removeChild(node); |
| } |
| |
| void RenderCounter::destroyCounterNodes(RenderElement& owner) |
| { |
| ASSERT(owner.hasCounterNodeMap()); |
| auto& maps = counterMaps(); |
| ASSERT(maps.contains(&owner)); |
| auto counterMap = maps.take(&owner); |
| for (auto& counterMapEntry : *counterMap) |
| destroyCounterNodeWithoutMapRemoval(counterMapEntry.key, counterMapEntry.value); |
| owner.setHasCounterNodeMap(false); |
| } |
| |
| void RenderCounter::destroyCounterNode(RenderElement& owner, const AtomString& identifier) |
| { |
| auto map = counterMaps().find(&owner); |
| if (map == counterMaps().end()) |
| return; |
| auto node = map->value->take(identifier); |
| if (!node) |
| return; |
| destroyCounterNodeWithoutMapRemoval(identifier, *node); |
| // We do not delete the map here even if it is now empty because we expect to |
| // reuse it. In order for a renderer to lose all its counters permanently, |
| // a style change for the renderer involving removal of all counter |
| // directives must occur, in which case, RenderCounter::destroyCounterNodes() |
| // will be called. |
| } |
| |
| void RenderCounter::rendererRemovedFromTree(RenderElement& renderer) |
| { |
| if (!renderer.view().hasRenderCounters()) |
| return; |
| RenderObject* currentRenderer = renderer.lastLeafChild(); |
| if (!currentRenderer) |
| currentRenderer = &renderer; |
| while (true) { |
| if (is<RenderElement>(*currentRenderer)) { |
| auto& counterNodeRenderer = downcast<RenderElement>(*currentRenderer); |
| if (counterNodeRenderer.hasCounterNodeMap()) |
| destroyCounterNodes(counterNodeRenderer); |
| } |
| if (currentRenderer == &renderer) |
| break; |
| currentRenderer = currentRenderer->previousInPreOrder(); |
| } |
| } |
| |
| static void updateCounters(RenderElement& renderer) |
| { |
| auto* directiveMap = renderer.style().counterDirectives(); |
| if (!directiveMap) |
| return; |
| if (!renderer.hasCounterNodeMap()) { |
| for (auto& key : directiveMap->keys()) |
| makeCounterNode(renderer, key, false); |
| return; |
| } |
| ASSERT(counterMaps().contains(&renderer)); |
| auto* counterMap = counterMaps().find(&renderer)->value.get(); |
| for (auto& key : directiveMap->keys()) { |
| RefPtr<CounterNode> node = counterMap->get(key); |
| if (!node) { |
| makeCounterNode(renderer, key, false); |
| continue; |
| } |
| auto place = findPlaceForCounter(renderer, key, node->hasResetType()); |
| if (node != counterMap->get(key)) |
| continue; |
| CounterNode* parent = node->parent(); |
| if (place.parent == parent && place.previousSibling == node->previousSibling()) |
| continue; |
| if (parent) |
| parent->removeChild(*node); |
| if (place.parent) |
| place.parent->insertAfter(*node, place.previousSibling.get(), key); |
| } |
| } |
| |
| void RenderCounter::rendererSubtreeAttached(RenderElement& renderer) |
| { |
| if (!renderer.view().hasRenderCounters()) |
| return; |
| Element* element = renderer.element(); |
| if (element && !element->isPseudoElement()) |
| element = element->parentElement(); |
| else |
| element = renderer.generatingElement(); |
| if (element && !element->renderer()) |
| return; // No need to update if the parent is not attached yet |
| |
| bool crossedStyleContainmentBoundary = false; |
| for (RenderObject* descendant = &renderer; descendant; descendant = descendant->nextInPreOrder(&renderer)) { |
| if (!is<RenderElement>(descendant)) |
| continue; |
| |
| crossedStyleContainmentBoundary = crossedStyleContainmentBoundary || downcast<RenderElement>(*descendant).shouldApplyStyleContainment(); |
| if (crossedStyleContainmentBoundary) |
| updateCounters(downcast<RenderElement>(*descendant)); |
| } |
| } |
| |
| void RenderCounter::rendererStyleChangedSlowCase(RenderElement& renderer, const RenderStyle* oldStyle, const RenderStyle& newStyle) |
| { |
| Element* element = renderer.generatingElement(); |
| if (!element || !element->renderer()) |
| return; // cannot have generated content or if it can have, it will be handled during attaching |
| |
| const CounterDirectiveMap* oldCounterDirectives; |
| if (oldStyle && (oldCounterDirectives = oldStyle->counterDirectives())) { |
| if (auto* newCounterDirectives = newStyle.counterDirectives()) { |
| for (auto& keyValue : *newCounterDirectives) { |
| auto existingEntry = oldCounterDirectives->find(keyValue.key); |
| if (existingEntry != oldCounterDirectives->end()) { |
| if (existingEntry->value == keyValue.value) |
| continue; |
| RenderCounter::destroyCounterNode(renderer, keyValue.key); |
| } |
| // We must create this node here, because the changed node may be a node with no display such as |
| // as those created by the increment or reset directives and the re-layout that will happen will |
| // not catch the change if the node had no children. |
| makeCounterNode(renderer, keyValue.key, false); |
| } |
| // Destroying old counters that do not exist in the new counterDirective map. |
| for (auto& key : oldCounterDirectives->keys()) { |
| if (!newCounterDirectives->contains(key)) |
| RenderCounter::destroyCounterNode(renderer, key); |
| } |
| } else { |
| if (renderer.hasCounterNodeMap()) |
| RenderCounter::destroyCounterNodes(renderer); |
| } |
| } else { |
| if (auto* newCounterDirectives = newStyle.counterDirectives()) { |
| for (auto& key : newCounterDirectives->keys()) { |
| // We must create this node here, because the added node may be a node with no display such as |
| // as those created by the increment or reset directives and the re-layout that will happen will |
| // not catch the change if the node had no children. |
| makeCounterNode(renderer, key, false); |
| } |
| } |
| } |
| } |
| |
| } // namespace WebCore |
| |
| #if ENABLE(TREE_DEBUGGING) |
| |
| void showCounterRendererTree(const WebCore::RenderObject* renderer, const char* counterName) |
| { |
| if (!renderer) |
| return; |
| auto* root = renderer; |
| while (root->parent()) |
| root = root->parent(); |
| |
| auto identifier = AtomString::fromLatin1(counterName); |
| for (auto* current = root; current; current = current->nextInPreOrder()) { |
| if (!is<WebCore::RenderElement>(*current)) |
| continue; |
| fprintf(stderr, "%c", (current == renderer) ? '*' : ' '); |
| for (auto* ancestor = current; ancestor && ancestor != root; ancestor = ancestor->parent()) |
| fprintf(stderr, " "); |
| fprintf(stderr, "%p N:%p P:%p PS:%p NS:%p C:%p\n", |
| current, current->node(), current->parent(), current->previousSibling(), |
| current->nextSibling(), downcast<WebCore::RenderElement>(*current).hasCounterNodeMap() ? |
| counterName ? WebCore::counterMaps().find(downcast<WebCore::RenderElement>(current))->value->get(identifier) : (WebCore::CounterNode*)1 : (WebCore::CounterNode*)0); |
| } |
| fflush(stderr); |
| } |
| |
| #endif // NDEBUG |
