| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Gunnstein Lye (gunnstein@netcom.no) |
| * (C) 2000 Frederik Holljen (frederik.holljen@hig.no) |
| * (C) 2001 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2004-2020 Apple Inc. All rights reserved. |
| * Copyright (C) 2011 Motorola Mobility. 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 "Range.h" |
| |
| #include "Comment.h" |
| #include "DOMRect.h" |
| #include "DOMRectList.h" |
| #include "DocumentFragment.h" |
| #include "ElementInlines.h" |
| #include "Event.h" |
| #include "Frame.h" |
| #include "FrameSelection.h" |
| #include "FrameView.h" |
| #include "GeometryUtilities.h" |
| #include "HTMLBodyElement.h" |
| #include "HTMLHtmlElement.h" |
| #include "HTMLNames.h" |
| #include "JSNode.h" |
| #include "NodeTraversal.h" |
| #include "NodeWithIndex.h" |
| #include "ProcessingInstruction.h" |
| #include "ScopedEventQueue.h" |
| #include "TextIterator.h" |
| #include "VisibleUnits.h" |
| #include "markup.h" |
| #include <stdio.h> |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/RefCountedLeakCounter.h> |
| #include <wtf/text/CString.h> |
| #include <wtf/text/StringBuilder.h> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, rangeCounter, ("Range")); |
| |
| enum ContentsProcessDirection { ProcessContentsForward, ProcessContentsBackward }; |
| |
| static ExceptionOr<void> processNodes(Range::ActionType, Vector<Ref<Node>>&, Node* oldContainer, RefPtr<Node> newContainer); |
| static ExceptionOr<RefPtr<Node>> processContentsBetweenOffsets(Range::ActionType, RefPtr<DocumentFragment>, RefPtr<Node> container, unsigned startOffset, unsigned endOffset); |
| static ExceptionOr<RefPtr<Node>> processAncestorsAndTheirSiblings(Range::ActionType, Node* container, ContentsProcessDirection, ExceptionOr<RefPtr<Node>>&& passedClonedContainer, Node* commonRoot); |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(Range); |
| |
| inline Range::Range(Document& ownerDocument) |
| : m_ownerDocument(ownerDocument) |
| , m_start(ownerDocument) |
| , m_end(ownerDocument) |
| { |
| #ifndef NDEBUG |
| rangeCounter.increment(); |
| #endif |
| |
| m_ownerDocument->attachRange(*this); |
| } |
| |
| Ref<Range> Range::create(Document& ownerDocument) |
| { |
| return adoptRef(*new Range(ownerDocument)); |
| } |
| |
| Range::~Range() |
| { |
| ASSERT(!m_isAssociatedWithSelection); |
| |
| m_ownerDocument->detachRange(*this); |
| |
| #ifndef NDEBUG |
| rangeCounter.decrement(); |
| #endif |
| } |
| |
| Node* Range::commonAncestorContainer() const |
| { |
| return commonInclusiveAncestor(startContainer(), endContainer()); |
| } |
| |
| void Range::updateAssociatedSelection() |
| { |
| if (m_isAssociatedWithSelection) |
| m_ownerDocument->selection().updateFromAssociatedLiveRange(); |
| } |
| |
| void Range::updateDocument() |
| { |
| auto& document = startContainer().document(); |
| if (m_ownerDocument.ptr() == &document) |
| return; |
| ASSERT(!m_isAssociatedWithSelection); |
| m_ownerDocument->detachRange(*this); |
| m_ownerDocument = document; |
| m_ownerDocument->attachRange(*this); |
| } |
| |
| ExceptionOr<void> Range::setStart(Ref<Node>&& container, unsigned offset) |
| { |
| auto childNode = checkNodeOffsetPair(container, offset); |
| if (childNode.hasException()) |
| return childNode.releaseException(); |
| |
| m_start.set(WTFMove(container), offset, childNode.releaseReturnValue()); |
| if (!is_lteq(treeOrder(makeBoundaryPoint(m_start), makeBoundaryPoint(m_end)))) |
| m_end = m_start; |
| updateAssociatedSelection(); |
| updateDocument(); |
| return { }; |
| } |
| |
| ExceptionOr<void> Range::setEnd(Ref<Node>&& container, unsigned offset) |
| { |
| auto childNode = checkNodeOffsetPair(container, offset); |
| if (childNode.hasException()) |
| return childNode.releaseException(); |
| |
| m_end.set(WTFMove(container), offset, childNode.releaseReturnValue()); |
| if (!is_lteq(treeOrder(makeBoundaryPoint(m_start), makeBoundaryPoint(m_end)))) |
| m_start = m_end; |
| updateAssociatedSelection(); |
| updateDocument(); |
| return { }; |
| } |
| |
| void Range::collapse(bool toStart) |
| { |
| if (toStart) |
| m_end = m_start; |
| else |
| m_start = m_end; |
| updateAssociatedSelection(); |
| } |
| |
| ExceptionOr<bool> Range::isPointInRange(Node& container, unsigned offset) |
| { |
| if (auto checkResult = checkNodeOffsetPair(container, offset); checkResult.hasException()) { |
| // DOM specification requires this check be done first but since there are no side effects, |
| // we can do it in reverse order to avoid an extra root node check in the common case. |
| if (&container.rootNode() != &startContainer().rootNode()) |
| return false; |
| return checkResult.releaseException(); |
| } |
| return contains(makeSimpleRange(*this), { container, offset }); |
| } |
| |
| ExceptionOr<short> Range::comparePoint(Node& container, unsigned offset) const |
| { |
| if (auto checkResult = checkNodeOffsetPair(container, offset); checkResult.hasException()) { |
| // DOM specification requires this check be done first but since there are no side effects, |
| // we can do it in reverse order to avoid an extra root node check in the common case. |
| if (&container.rootNode() != &startContainer().rootNode()) |
| return Exception { WrongDocumentError }; |
| return checkResult.releaseException(); |
| } |
| auto ordering = treeOrder({ container, offset }, makeSimpleRange(*this)); |
| if (is_lt(ordering)) |
| return -1; |
| if (is_eq(ordering)) |
| return 0; |
| if (is_gt(ordering)) |
| return 1; |
| return Exception { WrongDocumentError }; |
| } |
| |
| ExceptionOr<Range::CompareResults> Range::compareNode(Node& node) const |
| { |
| // FIXME: This deprecated function should be removed. |
| // We originally added it for interoperability with Firefox. |
| // Recent versions of Firefox have removed it. |
| |
| // http://developer.mozilla.org/en/docs/DOM:range.compareNode |
| // This method returns 0, 1, 2, or 3 based on if the node is before, after, |
| // before and after(surrounds), or inside the range, respectively. |
| |
| if (!node.isConnected() || &node.document() != m_ownerDocument.ptr()) { |
| // Match historical Firefox behavior. |
| return NODE_BEFORE; |
| } |
| |
| auto nodeRange = makeRangeSelectingNode(node); |
| if (!nodeRange) { |
| // Match historical Firefox behavior. |
| return Exception { NotFoundError }; |
| } |
| |
| auto startOrdering = treeOrder(nodeRange->start, makeBoundaryPoint(m_start)); |
| auto endOrdering = treeOrder(nodeRange->end, makeBoundaryPoint(m_end)); |
| if (is_gteq(startOrdering) && is_lteq(endOrdering)) |
| return NODE_INSIDE; |
| if (is_lteq(startOrdering) && is_gteq(endOrdering)) |
| return NODE_BEFORE_AND_AFTER; |
| if (is_lteq(startOrdering)) |
| return NODE_BEFORE; |
| if (is_gteq(endOrdering)) |
| return NODE_AFTER; |
| return Exception { WrongDocumentError }; |
| } |
| |
| ExceptionOr<short> Range::compareBoundaryPoints(unsigned short how, const Range& sourceRange) const |
| { |
| const RangeBoundaryPoint* thisPoint; |
| const RangeBoundaryPoint* otherPoint; |
| switch (how) { |
| case START_TO_START: |
| thisPoint = &m_start; |
| otherPoint = &sourceRange.m_start; |
| break; |
| case START_TO_END: |
| thisPoint = &m_end; |
| otherPoint = &sourceRange.m_start; |
| break; |
| case END_TO_END: |
| thisPoint = &m_end; |
| otherPoint = &sourceRange.m_end; |
| break; |
| case END_TO_START: |
| thisPoint = &m_start; |
| otherPoint = &sourceRange.m_end; |
| break; |
| default: |
| return Exception { NotSupportedError }; |
| } |
| auto ordering = treeOrder(makeBoundaryPoint(*thisPoint), makeBoundaryPoint(*otherPoint)); |
| if (is_lt(ordering)) |
| return -1; |
| if (is_eq(ordering)) |
| return 0; |
| if (is_gt(ordering)) |
| return 1; |
| return Exception { WrongDocumentError }; |
| } |
| |
| ExceptionOr<void> Range::deleteContents() |
| { |
| auto result = processContents(Delete); |
| if (result.hasException()) |
| return result.releaseException(); |
| return { }; |
| } |
| |
| bool Range::intersectsNode(Node& node) const |
| { |
| return intersects(makeSimpleRange(*this), node); |
| } |
| |
| static inline Node* highestAncestorUnderCommonRoot(Node* node, Node* commonRoot) |
| { |
| if (node == commonRoot) |
| return 0; |
| |
| ASSERT(commonRoot->contains(node)); |
| |
| while (node->parentNode() != commonRoot) |
| node = node->parentNode(); |
| |
| return node; |
| } |
| |
| static inline Node* childOfCommonRootBeforeOffset(Node* container, unsigned offset, Node* commonRoot) |
| { |
| ASSERT(container); |
| ASSERT(commonRoot); |
| |
| if (!commonRoot->contains(container)) |
| return 0; |
| |
| if (container == commonRoot) { |
| container = container->firstChild(); |
| for (unsigned i = 0; container && i < offset; i++) |
| container = container->nextSibling(); |
| } else { |
| while (container->parentNode() != commonRoot) |
| container = container->parentNode(); |
| } |
| |
| return container; |
| } |
| |
| ExceptionOr<RefPtr<DocumentFragment>> Range::processContents(ActionType action) |
| { |
| RefPtr<DocumentFragment> fragment; |
| if (action == Extract || action == Clone) |
| fragment = DocumentFragment::create(m_ownerDocument); |
| |
| if (collapsed()) |
| return fragment; |
| |
| RefPtr<Node> commonRoot = commonAncestorContainer(); |
| ASSERT(commonRoot); |
| |
| if (&startContainer() == &endContainer()) { |
| auto result = processContentsBetweenOffsets(action, fragment, &startContainer(), m_start.offset(), m_end.offset()); |
| if (result.hasException()) |
| return result.releaseException(); |
| return fragment; |
| } |
| |
| // Since mutation events can modify the range during the process, the boundary points need to be saved. |
| RangeBoundaryPoint originalStart(m_start); |
| RangeBoundaryPoint originalEnd(m_end); |
| |
| // what is the highest node that partially selects the start / end of the range? |
| RefPtr<Node> partialStart = highestAncestorUnderCommonRoot(&originalStart.container(), commonRoot.get()); |
| RefPtr<Node> partialEnd = highestAncestorUnderCommonRoot(&originalEnd.container(), commonRoot.get()); |
| |
| // Start and end containers are different. |
| // There are three possibilities here: |
| // 1. Start container == commonRoot (End container must be a descendant) |
| // 2. End container == commonRoot (Start container must be a descendant) |
| // 3. Neither is commonRoot, they are both descendants |
| // |
| // In case 3, we grab everything after the start (up until a direct child |
| // of commonRoot) into leftContents, and everything before the end (up until |
| // a direct child of commonRoot) into rightContents. Then we process all |
| // commonRoot children between leftContents and rightContents |
| // |
| // In case 1 or 2, we skip either processing of leftContents or rightContents, |
| // in which case the last lot of nodes either goes from the first or last |
| // child of commonRoot. |
| // |
| // These are deleted, cloned, or extracted (i.e. both) depending on action. |
| |
| // Note that we are verifying that our common root hierarchy is still intact |
| // after any DOM mutation event, at various stages below. See webkit bug 60350. |
| |
| RefPtr<Node> leftContents; |
| if (&originalStart.container() != commonRoot && commonRoot->contains(&originalStart.container())) { |
| auto firstResult = processContentsBetweenOffsets(action, nullptr, &originalStart.container(), originalStart.offset(), originalStart.container().length()); |
| auto secondResult = processAncestorsAndTheirSiblings(action, &originalStart.container(), ProcessContentsForward, WTFMove(firstResult), commonRoot.get()); |
| // FIXME: A bit peculiar that we silently ignore the exception here, but we do have at least some regression tests that rely on this behavior. |
| if (!secondResult.hasException()) |
| leftContents = secondResult.releaseReturnValue(); |
| } |
| |
| RefPtr<Node> rightContents; |
| if (&endContainer() != commonRoot && commonRoot->contains(&originalEnd.container())) { |
| auto firstResult = processContentsBetweenOffsets(action, nullptr, &originalEnd.container(), 0, originalEnd.offset()); |
| auto secondResult = processAncestorsAndTheirSiblings(action, &originalEnd.container(), ProcessContentsBackward, WTFMove(firstResult), commonRoot.get()); |
| // FIXME: A bit peculiar that we silently ignore the exception here, but we do have at least some regression tests that rely on this behavior. |
| if (!secondResult.hasException()) |
| rightContents = secondResult.releaseReturnValue(); |
| } |
| |
| // delete all children of commonRoot between the start and end container |
| RefPtr<Node> processStart = childOfCommonRootBeforeOffset(&originalStart.container(), originalStart.offset(), commonRoot.get()); |
| if (processStart && &originalStart.container() != commonRoot) // processStart contains nodes before m_start. |
| processStart = processStart->nextSibling(); |
| RefPtr<Node> processEnd = childOfCommonRootBeforeOffset(&originalEnd.container(), originalEnd.offset(), commonRoot.get()); |
| |
| // Collapse the range, making sure that the result is not within a node that was partially selected. |
| if (action == Extract || action == Delete) { |
| if (partialStart && commonRoot->contains(partialStart.get())) { |
| auto result = setStart(*partialStart->parentNode(), partialStart->computeNodeIndex() + 1); |
| if (result.hasException()) |
| return result.releaseException(); |
| } else if (partialEnd && commonRoot->contains(partialEnd.get())) { |
| auto result = setStart(*partialEnd->parentNode(), partialEnd->computeNodeIndex()); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| collapse(true); |
| } |
| |
| // Now add leftContents, stuff in between, and rightContents to the fragment |
| // (or just delete the stuff in between) |
| |
| if ((action == Extract || action == Clone) && leftContents) { |
| auto result = fragment->appendChild(*leftContents); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| |
| if (processStart) { |
| Vector<Ref<Node>> nodes; |
| for (Node* node = processStart.get(); node && node != processEnd; node = node->nextSibling()) |
| nodes.append(*node); |
| auto result = processNodes(action, nodes, commonRoot.get(), fragment.get()); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| |
| if ((action == Extract || action == Clone) && rightContents) { |
| auto result = fragment->appendChild(*rightContents); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| |
| return fragment; |
| } |
| |
| static inline ExceptionOr<void> deleteCharacterData(CharacterData& data, unsigned startOffset, unsigned endOffset) |
| { |
| if (data.length() - endOffset) { |
| auto result = data.deleteData(endOffset, data.length() - endOffset); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| if (startOffset) { |
| auto result = data.deleteData(0, startOffset); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| return { }; |
| } |
| |
| static ExceptionOr<RefPtr<Node>> processContentsBetweenOffsets(Range::ActionType action, RefPtr<DocumentFragment> fragment, RefPtr<Node> container, unsigned startOffset, unsigned endOffset) |
| { |
| ASSERT(container); |
| ASSERT(startOffset <= endOffset); |
| |
| RefPtr<Node> result; |
| |
| switch (container->nodeType()) { |
| case Node::TEXT_NODE: |
| case Node::CDATA_SECTION_NODE: |
| case Node::COMMENT_NODE: |
| endOffset = std::min(endOffset, downcast<CharacterData>(*container).length()); |
| startOffset = std::min(startOffset, endOffset); |
| if (action == Range::Extract || action == Range::Clone) { |
| Ref<CharacterData> characters = downcast<CharacterData>(container->cloneNode(true).get()); |
| auto deleteResult = deleteCharacterData(characters, startOffset, endOffset); |
| if (deleteResult.hasException()) |
| return deleteResult.releaseException(); |
| if (fragment) { |
| result = fragment; |
| auto appendResult = result->appendChild(characters); |
| if (appendResult.hasException()) |
| return appendResult.releaseException(); |
| } else |
| result = WTFMove(characters); |
| } |
| if (action == Range::Extract || action == Range::Delete) { |
| auto deleteResult = downcast<CharacterData>(*container).deleteData(startOffset, endOffset - startOffset); |
| if (deleteResult.hasException()) |
| return deleteResult.releaseException(); |
| } |
| break; |
| case Node::PROCESSING_INSTRUCTION_NODE: { |
| auto& instruction = downcast<ProcessingInstruction>(*container); |
| endOffset = std::min(endOffset, downcast<ProcessingInstruction>(*container).data().length()); |
| startOffset = std::min(startOffset, endOffset); |
| if (action == Range::Extract || action == Range::Clone) { |
| Ref<ProcessingInstruction> processingInstruction = downcast<ProcessingInstruction>(container->cloneNode(true).get()); |
| processingInstruction->setData(processingInstruction->data().substring(startOffset, endOffset - startOffset)); |
| if (fragment) { |
| result = fragment; |
| auto appendResult = result->appendChild(processingInstruction); |
| if (appendResult.hasException()) |
| return appendResult.releaseException(); |
| } else |
| result = WTFMove(processingInstruction); |
| } |
| if (action == Range::Extract || action == Range::Delete) { |
| auto data = makeStringByRemoving(instruction.data(), startOffset, endOffset - startOffset); |
| instruction.setData(WTFMove(data)); |
| } |
| break; |
| } |
| case Node::ELEMENT_NODE: |
| case Node::ATTRIBUTE_NODE: |
| case Node::DOCUMENT_NODE: |
| case Node::DOCUMENT_TYPE_NODE: |
| case Node::DOCUMENT_FRAGMENT_NODE: |
| // FIXME: Should we assert that some nodes never appear here? |
| if (action == Range::Extract || action == Range::Clone) { |
| if (fragment) |
| result = fragment; |
| else |
| result = container->cloneNode(false); |
| } |
| Vector<Ref<Node>> nodes; |
| Node* n = container->firstChild(); |
| for (unsigned i = startOffset; n && i; i--) |
| n = n->nextSibling(); |
| for (unsigned i = startOffset; n && i < endOffset; i++, n = n->nextSibling()) { |
| if (action != Range::Delete && n->isDocumentTypeNode()) { |
| return Exception { HierarchyRequestError }; |
| } |
| nodes.append(*n); |
| } |
| auto processResult = processNodes(action, nodes, container.get(), result); |
| if (processResult.hasException()) |
| return processResult.releaseException(); |
| break; |
| } |
| |
| return result; |
| } |
| |
| static ExceptionOr<void> processNodes(Range::ActionType action, Vector<Ref<Node>>& nodes, Node* oldContainer, RefPtr<Node> newContainer) |
| { |
| for (auto& node : nodes) { |
| switch (action) { |
| case Range::Delete: { |
| auto result = oldContainer->removeChild(node); |
| if (result.hasException()) |
| return result.releaseException(); |
| break; |
| } |
| case Range::Extract: { |
| auto result = newContainer->appendChild(node); // will remove node from its parent |
| if (result.hasException()) |
| return result.releaseException(); |
| break; |
| } |
| case Range::Clone: { |
| auto result = newContainer->appendChild(node->cloneNode(true)); |
| if (result.hasException()) |
| return result.releaseException(); |
| break; |
| } |
| } |
| } |
| return { }; |
| } |
| |
| ExceptionOr<RefPtr<Node>> processAncestorsAndTheirSiblings(Range::ActionType action, Node* container, ContentsProcessDirection direction, ExceptionOr<RefPtr<Node>>&& passedClonedContainer, Node* commonRoot) |
| { |
| if (passedClonedContainer.hasException()) |
| return WTFMove(passedClonedContainer); |
| |
| RefPtr<Node> clonedContainer = passedClonedContainer.releaseReturnValue(); |
| |
| Vector<Ref<ContainerNode>> ancestors; |
| for (ContainerNode* ancestor = container->parentNode(); ancestor && ancestor != commonRoot; ancestor = ancestor->parentNode()) |
| ancestors.append(*ancestor); |
| |
| RefPtr<Node> firstChildInAncestorToProcess = direction == ProcessContentsForward ? container->nextSibling() : container->previousSibling(); |
| for (auto& ancestor : ancestors) { |
| if (action == Range::Extract || action == Range::Clone) { |
| auto clonedAncestor = ancestor->cloneNode(false); // Might have been removed already during mutation event. |
| if (clonedContainer) { |
| auto result = clonedAncestor->appendChild(*clonedContainer); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| clonedContainer = WTFMove(clonedAncestor); |
| } |
| |
| // Copy siblings of an ancestor of start/end containers |
| // FIXME: This assertion may fail if DOM is modified during mutation event |
| // FIXME: Share code with Range::processNodes |
| ASSERT(!firstChildInAncestorToProcess || firstChildInAncestorToProcess->parentNode() == ancestor.ptr()); |
| |
| Vector<Ref<Node>> nodes; |
| for (Node* child = firstChildInAncestorToProcess.get(); child; |
| child = (direction == ProcessContentsForward) ? child->nextSibling() : child->previousSibling()) |
| nodes.append(*child); |
| |
| for (auto& child : nodes) { |
| switch (action) { |
| case Range::Delete: { |
| auto result = ancestor->removeChild(child); |
| if (result.hasException()) |
| return result.releaseException(); |
| break; |
| } |
| case Range::Extract: // will remove child from ancestor |
| if (direction == ProcessContentsForward) { |
| auto result = clonedContainer->appendChild(child); |
| if (result.hasException()) |
| return result.releaseException(); |
| } else { |
| auto result = clonedContainer->insertBefore(child, clonedContainer->firstChild()); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| break; |
| case Range::Clone: |
| if (direction == ProcessContentsForward) { |
| auto result = clonedContainer->appendChild(child->cloneNode(true)); |
| if (result.hasException()) |
| return result.releaseException(); |
| } else { |
| auto result = clonedContainer->insertBefore(child->cloneNode(true), clonedContainer->firstChild()); |
| if (result.hasException()) |
| return result.releaseException(); |
| } |
| break; |
| } |
| } |
| firstChildInAncestorToProcess = direction == ProcessContentsForward ? ancestor->nextSibling() : ancestor->previousSibling(); |
| } |
| |
| return clonedContainer; |
| } |
| |
| ExceptionOr<Ref<DocumentFragment>> Range::extractContents() |
| { |
| auto result = processContents(Extract); |
| if (result.hasException()) |
| return result.releaseException(); |
| return result.releaseReturnValue().releaseNonNull(); |
| } |
| |
| ExceptionOr<Ref<DocumentFragment>> Range::cloneContents() |
| { |
| auto result = processContents(Clone); |
| if (result.hasException()) |
| return result.releaseException(); |
| return result.releaseReturnValue().releaseNonNull(); |
| } |
| |
| ExceptionOr<void> Range::insertNode(Ref<Node>&& node) |
| { |
| auto startContainerNodeType = startContainer().nodeType(); |
| |
| if (startContainerNodeType == Node::COMMENT_NODE || startContainerNodeType == Node::PROCESSING_INSTRUCTION_NODE) |
| return Exception { HierarchyRequestError }; |
| bool startIsText = startContainerNodeType == Node::TEXT_NODE; |
| if (startIsText && !startContainer().parentNode()) |
| return Exception { HierarchyRequestError }; |
| if (node.ptr() == &startContainer()) |
| return Exception { HierarchyRequestError }; |
| |
| RefPtr<Node> referenceNode = startIsText ? &startContainer() : startContainer().traverseToChildAt(startOffset()); |
| Node* parentNode = referenceNode ? referenceNode->parentNode() : &startContainer(); |
| if (!is<ContainerNode>(parentNode)) |
| return Exception { HierarchyRequestError }; |
| |
| Ref<ContainerNode> parent = downcast<ContainerNode>(*parentNode); |
| |
| auto result = parent->ensurePreInsertionValidity(node, referenceNode.get()); |
| if (result.hasException()) |
| return result.releaseException(); |
| |
| EventQueueScope scope; |
| if (startIsText) { |
| auto result = downcast<Text>(startContainer()).splitText(startOffset()); |
| if (result.hasException()) |
| return result.releaseException(); |
| referenceNode = result.releaseReturnValue(); |
| } |
| |
| if (referenceNode == node.ptr()) |
| referenceNode = referenceNode->nextSibling(); |
| |
| auto removeResult = node->remove(); |
| if (removeResult.hasException()) |
| return removeResult.releaseException(); |
| |
| unsigned newOffset = referenceNode ? referenceNode->computeNodeIndex() : parent->countChildNodes(); |
| if (is<DocumentFragment>(node)) |
| newOffset += downcast<DocumentFragment>(node.get()).countChildNodes(); |
| else |
| ++newOffset; |
| |
| auto insertResult = parent->insertBefore(node, referenceNode.get()); |
| if (insertResult.hasException()) |
| return insertResult.releaseException(); |
| |
| if (collapsed()) |
| return setEnd(WTFMove(parent), newOffset); |
| |
| return { }; |
| } |
| |
| String Range::toString() const |
| { |
| auto range = makeSimpleRange(*this); |
| StringBuilder builder; |
| for (auto& node : intersectingNodes(range)) { |
| if (is<Text>(node)) { |
| auto offsetRange = characterDataOffsetRange(range, node); |
| builder.appendSubstring(downcast<Text>(node).data(), offsetRange.start, offsetRange.end - offsetRange.start); |
| } |
| } |
| return builder.toString(); |
| } |
| |
| // https://w3c.github.io/DOM-Parsing/#widl-Range-createContextualFragment-DocumentFragment-DOMString-fragment |
| ExceptionOr<Ref<DocumentFragment>> Range::createContextualFragment(const String& markup) |
| { |
| Node& node = startContainer(); |
| RefPtr<Element> element; |
| if (is<Document>(node) || is<DocumentFragment>(node)) |
| element = nullptr; |
| else if (is<Element>(node)) |
| element = &downcast<Element>(node); |
| else |
| element = node.parentElement(); |
| if (!element || (element->document().isHTMLDocument() && is<HTMLHtmlElement>(*element))) |
| element = HTMLBodyElement::create(node.document()); |
| return WebCore::createContextualFragment(*element, markup, AllowScriptingContentAndDoNotMarkAlreadyStarted); |
| } |
| |
| ExceptionOr<Node*> Range::checkNodeOffsetPair(Node& node, unsigned offset) |
| { |
| switch (node.nodeType()) { |
| case Node::DOCUMENT_TYPE_NODE: |
| return Exception { InvalidNodeTypeError }; |
| case Node::CDATA_SECTION_NODE: |
| case Node::COMMENT_NODE: |
| case Node::TEXT_NODE: |
| case Node::PROCESSING_INSTRUCTION_NODE: |
| if (offset > downcast<CharacterData>(node).length()) |
| return Exception { IndexSizeError }; |
| return nullptr; |
| case Node::ATTRIBUTE_NODE: |
| case Node::DOCUMENT_FRAGMENT_NODE: |
| case Node::DOCUMENT_NODE: |
| case Node::ELEMENT_NODE: |
| if (!offset) |
| return nullptr; |
| auto childBefore = node.traverseToChildAt(offset - 1); |
| if (!childBefore) |
| return Exception { IndexSizeError }; |
| return childBefore; |
| } |
| ASSERT_NOT_REACHED(); |
| return Exception { InvalidNodeTypeError }; |
| } |
| |
| Ref<Range> Range::cloneRange() const |
| { |
| auto result = create(m_ownerDocument); |
| result->setStart(startContainer(), m_start.offset()); |
| result->setEnd(endContainer(), m_end.offset()); |
| return result; |
| } |
| |
| ExceptionOr<void> Range::setStartAfter(Node& node) |
| { |
| auto parent = node.parentNode(); |
| if (!parent) |
| return Exception { InvalidNodeTypeError }; |
| return setStart(*parent, node.computeNodeIndex() + 1); |
| } |
| |
| ExceptionOr<void> Range::setEndBefore(Node& node) |
| { |
| auto parent = node.parentNode(); |
| if (!parent) |
| return Exception { InvalidNodeTypeError }; |
| return setEnd(*parent, node.computeNodeIndex()); |
| } |
| |
| ExceptionOr<void> Range::setEndAfter(Node& node) |
| { |
| auto parent = node.parentNode(); |
| if (!parent) |
| return Exception { InvalidNodeTypeError }; |
| return setEnd(*parent, node.computeNodeIndex() + 1); |
| } |
| |
| ExceptionOr<void> Range::selectNode(Node& node) |
| { |
| auto parent = node.parentNode(); |
| if (!parent) |
| return Exception { InvalidNodeTypeError }; |
| unsigned index = node.computeNodeIndex(); |
| auto result = setStart(*parent, index); |
| if (result.hasException()) |
| return result.releaseException(); |
| return setEnd(*parent, index + 1); |
| } |
| |
| ExceptionOr<void> Range::selectNodeContents(Node& node) |
| { |
| if (node.isDocumentTypeNode()) |
| return Exception { InvalidNodeTypeError }; |
| m_start.setToBeforeContents(node); |
| m_end.setToAfterContents(node); |
| updateAssociatedSelection(); |
| updateDocument(); |
| return { }; |
| } |
| |
| // https://dom.spec.whatwg.org/#dom-range-surroundcontents |
| ExceptionOr<void> Range::surroundContents(Node& newParent) |
| { |
| Ref<Node> protectedNewParent(newParent); |
| |
| // Step 1: If a non-Text node is partially contained in the context object, then throw an InvalidStateError. |
| Node* startNonTextContainer = &startContainer(); |
| if (startNonTextContainer->nodeType() == Node::TEXT_NODE) |
| startNonTextContainer = startNonTextContainer->parentNode(); |
| Node* endNonTextContainer = &endContainer(); |
| if (endNonTextContainer->nodeType() == Node::TEXT_NODE) |
| endNonTextContainer = endNonTextContainer->parentNode(); |
| if (startNonTextContainer != endNonTextContainer) |
| return Exception { InvalidStateError }; |
| |
| // Step 2: If newParent is a Document, DocumentType, or DocumentFragment node, then throw an InvalidNodeTypeError. |
| switch (newParent.nodeType()) { |
| case Node::ATTRIBUTE_NODE: |
| case Node::DOCUMENT_FRAGMENT_NODE: |
| case Node::DOCUMENT_NODE: |
| case Node::DOCUMENT_TYPE_NODE: |
| return Exception { InvalidNodeTypeError }; |
| case Node::CDATA_SECTION_NODE: |
| case Node::COMMENT_NODE: |
| case Node::ELEMENT_NODE: |
| case Node::PROCESSING_INSTRUCTION_NODE: |
| case Node::TEXT_NODE: |
| break; |
| } |
| |
| // Step 3: Let fragment be the result of extracting context object. |
| auto fragment = extractContents(); |
| if (fragment.hasException()) |
| return fragment.releaseException(); |
| |
| // Step 4: If newParent has children, replace all with null within newParent. |
| if (newParent.hasChildNodes()) |
| downcast<ContainerNode>(newParent).replaceAll(nullptr); |
| |
| // Step 5: Insert newParent into context object. |
| auto insertResult = insertNode(newParent); |
| if (insertResult.hasException()) |
| return insertResult.releaseException(); |
| |
| // Step 6: Append fragment to newParent. |
| auto appendResult = newParent.appendChild(fragment.releaseReturnValue()); |
| if (appendResult.hasException()) |
| return appendResult.releaseException(); |
| |
| // Step 7: Select newParent within context object. |
| return selectNode(newParent); |
| } |
| |
| ExceptionOr<void> Range::setStartBefore(Node& node) |
| { |
| auto parent = node.parentNode(); |
| if (!parent) |
| return Exception { InvalidNodeTypeError }; |
| return setStart(*parent, node.computeNodeIndex()); |
| } |
| |
| #if ENABLE(TREE_DEBUGGING) |
| String Range::debugDescription() const |
| { |
| return makeString("from offset ", m_start.offset(), " of ", startContainer().debugDescription(), " to offset ", m_end.offset(), " of ", endContainer().debugDescription()); |
| } |
| #endif |
| |
| static inline void boundaryNodeChildrenChanged(RangeBoundaryPoint& boundary, ContainerNode& container) |
| { |
| if (boundary.childBefore() && &boundary.container() == &container) |
| boundary.invalidateOffset(); |
| } |
| |
| void Range::nodeChildrenChanged(ContainerNode& container) |
| { |
| ASSERT(&container.document() == m_ownerDocument.ptr()); |
| boundaryNodeChildrenChanged(m_start, container); |
| boundaryNodeChildrenChanged(m_end, container); |
| } |
| |
| static inline void boundaryNodeChildrenWillBeRemoved(RangeBoundaryPoint& boundary, ContainerNode& containerOfNodesToBeRemoved) |
| { |
| if (containerOfNodesToBeRemoved.contains(&boundary.container())) |
| boundary.setToBeforeContents(containerOfNodesToBeRemoved); |
| } |
| |
| void Range::nodeChildrenWillBeRemoved(ContainerNode& container) |
| { |
| ASSERT(&container.document() == m_ownerDocument.ptr()); |
| boundaryNodeChildrenWillBeRemoved(m_start, container); |
| boundaryNodeChildrenWillBeRemoved(m_end, container); |
| } |
| |
| static inline void boundaryNodeWillBeRemoved(RangeBoundaryPoint& boundary, Node& nodeToBeRemoved) |
| { |
| if (boundary.childBefore() == &nodeToBeRemoved) |
| boundary.childBeforeWillBeRemoved(); |
| else if (nodeToBeRemoved.contains(&boundary.container())) |
| boundary.setToBeforeNode(nodeToBeRemoved); |
| } |
| |
| void Range::nodeWillBeRemoved(Node& node) |
| { |
| ASSERT(&node.document() == m_ownerDocument.ptr()); |
| ASSERT(&node != m_ownerDocument.ptr()); |
| ASSERT(node.parentNode()); |
| boundaryNodeWillBeRemoved(m_start, node); |
| boundaryNodeWillBeRemoved(m_end, node); |
| } |
| |
| bool Range::parentlessNodeMovedToNewDocumentAffectsRange(Node& node) |
| { |
| return node.containsIncludingShadowDOM(&m_start.container()); |
| } |
| |
| void Range::updateRangeForParentlessNodeMovedToNewDocument(Node& node) |
| { |
| m_ownerDocument->detachRange(*this); |
| m_ownerDocument = node.document(); |
| m_ownerDocument->attachRange(*this); |
| } |
| |
| static inline void boundaryTextInserted(RangeBoundaryPoint& boundary, Node& text, unsigned offset, unsigned length) |
| { |
| if (&boundary.container() != &text) |
| return; |
| unsigned boundaryOffset = boundary.offset(); |
| if (offset >= boundaryOffset) |
| return; |
| boundary.setOffset(boundaryOffset + length); |
| } |
| |
| void Range::textInserted(Node& text, unsigned offset, unsigned length) |
| { |
| ASSERT(&text.document() == m_ownerDocument.ptr()); |
| boundaryTextInserted(m_start, text, offset, length); |
| boundaryTextInserted(m_end, text, offset, length); |
| } |
| |
| static inline void boundaryTextRemoved(RangeBoundaryPoint& boundary, Node& text, unsigned offset, unsigned length) |
| { |
| if (&boundary.container() != &text) |
| return; |
| unsigned boundaryOffset = boundary.offset(); |
| if (offset >= boundaryOffset) |
| return; |
| if (offset + length >= boundaryOffset) |
| boundary.setOffset(offset); |
| else |
| boundary.setOffset(boundaryOffset - length); |
| } |
| |
| void Range::textRemoved(Node& text, unsigned offset, unsigned length) |
| { |
| ASSERT(&text.document() == m_ownerDocument.ptr()); |
| boundaryTextRemoved(m_start, text, offset, length); |
| boundaryTextRemoved(m_end, text, offset, length); |
| } |
| |
| static inline void boundaryTextNodesMerged(RangeBoundaryPoint& boundary, NodeWithIndex& oldNode, unsigned offset) |
| { |
| if (&boundary.container() == oldNode.node()) |
| boundary.set(*oldNode.node()->previousSibling(), boundary.offset() + offset, 0); |
| else if (&boundary.container() == oldNode.node()->parentNode() && boundary.offset() == static_cast<unsigned>(oldNode.index())) |
| boundary.set(*oldNode.node()->previousSibling(), offset, 0); |
| } |
| |
| void Range::textNodesMerged(NodeWithIndex& oldNode, unsigned offset) |
| { |
| ASSERT(oldNode.node()); |
| ASSERT(&oldNode.node()->document() == m_ownerDocument.ptr()); |
| ASSERT(oldNode.node()->parentNode()); |
| ASSERT(oldNode.node()->isTextNode()); |
| ASSERT(oldNode.node()->previousSibling()); |
| ASSERT(oldNode.node()->previousSibling()->isTextNode()); |
| boundaryTextNodesMerged(m_start, oldNode, offset); |
| boundaryTextNodesMerged(m_end, oldNode, offset); |
| } |
| |
| static inline void boundaryTextNodesSplit(RangeBoundaryPoint& boundary, Text& oldNode) |
| { |
| auto* parent = oldNode.parentNode(); |
| if (&boundary.container() == &oldNode) { |
| unsigned splitOffset = oldNode.length(); |
| unsigned boundaryOffset = boundary.offset(); |
| if (boundaryOffset > splitOffset) { |
| if (parent) |
| boundary.set(*oldNode.nextSibling(), boundaryOffset - splitOffset, 0); |
| else |
| boundary.setOffset(splitOffset); |
| } |
| return; |
| } |
| if (!parent) |
| return; |
| if (&boundary.container() == parent && boundary.childBefore() == &oldNode) { |
| auto* newChild = oldNode.nextSibling(); |
| ASSERT(newChild); |
| boundary.setToAfterNode(*newChild); |
| } |
| } |
| |
| void Range::textNodeSplit(Text& oldNode) |
| { |
| ASSERT(&oldNode.document() == m_ownerDocument.ptr()); |
| ASSERT(!oldNode.parentNode() || oldNode.nextSibling()); |
| ASSERT(!oldNode.parentNode() || oldNode.nextSibling()->isTextNode()); |
| boundaryTextNodesSplit(m_start, oldNode); |
| boundaryTextNodesSplit(m_end, oldNode); |
| } |
| |
| ExceptionOr<void> Range::expand(const String& unit) |
| { |
| auto start = VisiblePosition { makeContainerOffsetPosition(&startContainer(), startOffset()) }; |
| auto end = VisiblePosition { makeContainerOffsetPosition(&endContainer(), endOffset()) }; |
| if (unit == "word"_s) { |
| start = startOfWord(start); |
| end = endOfWord(end); |
| } else if (unit == "sentence"_s) { |
| start = startOfSentence(start); |
| end = endOfSentence(end); |
| } else if (unit == "block"_s) { |
| start = startOfParagraph(start); |
| end = endOfParagraph(end); |
| } else if (unit == "document"_s) { |
| start = startOfDocument(start); |
| end = endOfDocument(end); |
| } else |
| return { }; |
| |
| auto* startContainer = start.deepEquivalent().containerNode(); |
| if (!startContainer) |
| return Exception { TypeError }; |
| auto result = setStart(*startContainer, start.deepEquivalent().computeOffsetInContainerNode()); |
| if (result.hasException()) |
| return result.releaseException(); |
| auto* endContainer = end.deepEquivalent().containerNode(); |
| if (!endContainer) |
| return Exception { TypeError }; |
| return setEnd(*endContainer, end.deepEquivalent().computeOffsetInContainerNode()); |
| } |
| |
| Ref<DOMRectList> Range::getClientRects() const |
| { |
| startContainer().document().updateLayout(); |
| return DOMRectList::create(RenderObject::clientBorderAndTextRects(makeSimpleRange(*this))); |
| } |
| |
| Ref<DOMRect> Range::getBoundingClientRect() const |
| { |
| startContainer().document().updateLayout(); |
| return DOMRect::create(unionRectIgnoringZeroRects(RenderObject::clientBorderAndTextRects(makeSimpleRange(*this)))); |
| } |
| |
| static void setBothEndpoints(Range& range, const SimpleRange& value) |
| { |
| auto startContainer = value.start.container; |
| range.setStart(WTFMove(startContainer), value.start.offset); |
| auto endContainer = value.end.container; |
| range.setEnd(WTFMove(endContainer), value.end.offset); |
| } |
| |
| void Range::updateFromSelection(const SimpleRange& value) |
| { |
| ASSERT(m_isAssociatedWithSelection); |
| m_isAssociatedWithSelection = false; |
| setBothEndpoints(*this, value); |
| m_isAssociatedWithSelection = true; |
| } |
| |
| DOMWindow* Range::window() const |
| { |
| return m_isAssociatedWithSelection ? m_ownerDocument->domWindow() : nullptr; |
| } |
| |
| SimpleRange makeSimpleRange(const Range& range) |
| { |
| return { { range.startContainer(), range.startOffset() }, { range.endContainer(), range.endOffset() } }; |
| } |
| |
| SimpleRange makeSimpleRange(const Ref<Range>& range) |
| { |
| return makeSimpleRange(range.get()); |
| } |
| |
| std::optional<SimpleRange> makeSimpleRange(const Range* range) |
| { |
| if (!range) |
| return std::nullopt; |
| return makeSimpleRange(*range); |
| } |
| |
| std::optional<SimpleRange> makeSimpleRange(const RefPtr<Range>& range) |
| { |
| return makeSimpleRange(range.get()); |
| } |
| |
| Ref<Range> createLiveRange(const SimpleRange& range) |
| { |
| auto result = Range::create(range.start.document()); |
| setBothEndpoints(result, range); |
| return result; |
| } |
| |
| RefPtr<Range> createLiveRange(const std::optional<SimpleRange>& range) |
| { |
| if (!range) |
| return nullptr; |
| return createLiveRange(*range); |
| } |
| |
| void Range::visitNodesConcurrently(JSC::AbstractSlotVisitor& visitor) const |
| { |
| addWebCoreOpaqueRoot(visitor, m_start.container()); |
| addWebCoreOpaqueRoot(visitor, m_end.container()); |
| } |
| |
| } // namespace WebCore |
| |
| #if ENABLE(TREE_DEBUGGING) |
| |
| void showTree(const WebCore::Range* range) |
| { |
| if (range) { |
| range->startContainer().showTreeAndMark(&range->startContainer(), "S", &range->endContainer(), "E"); |
| fprintf(stderr, "start offset: %d, end offset: %d\n", range->startOffset(), range->endOffset()); |
| } |
| } |
| |
| #endif |
