| /* |
| * (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, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 "third_party/blink/renderer/core/dom/range.h" |
| |
| #include "third_party/blink/renderer/bindings/core/v8/string_or_trusted_html.h" |
| #include "third_party/blink/renderer/core/dom/character_data.h" |
| #include "third_party/blink/renderer/core/dom/container_node.h" |
| #include "third_party/blink/renderer/core/dom/document_fragment.h" |
| #include "third_party/blink/renderer/core/dom/events/event_dispatch_forbidden_scope.h" |
| #include "third_party/blink/renderer/core/dom/events/scoped_event_queue.h" |
| #include "third_party/blink/renderer/core/dom/node.h" |
| #include "third_party/blink/renderer/core/dom/node_traversal.h" |
| #include "third_party/blink/renderer/core/dom/node_with_index.h" |
| #include "third_party/blink/renderer/core/dom/processing_instruction.h" |
| #include "third_party/blink/renderer/core/dom/text.h" |
| #include "third_party/blink/renderer/core/editing/editing_utilities.h" |
| #include "third_party/blink/renderer/core/editing/ephemeral_range.h" |
| #include "third_party/blink/renderer/core/editing/frame_selection.h" |
| #include "third_party/blink/renderer/core/editing/iterators/text_iterator.h" |
| #include "third_party/blink/renderer/core/editing/selection_template.h" |
| #include "third_party/blink/renderer/core/editing/serializers/serialization.h" |
| #include "third_party/blink/renderer/core/editing/set_selection_options.h" |
| #include "third_party/blink/renderer/core/editing/visible_position.h" |
| #include "third_party/blink/renderer/core/editing/visible_units.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/settings.h" |
| #include "third_party/blink/renderer/core/geometry/dom_rect.h" |
| #include "third_party/blink/renderer/core/geometry/dom_rect_list.h" |
| #include "third_party/blink/renderer/core/html/html_body_element.h" |
| #include "third_party/blink/renderer/core/html/html_element.h" |
| #include "third_party/blink/renderer/core/layout/layout_object.h" |
| #include "third_party/blink/renderer/core/layout/layout_text.h" |
| #include "third_party/blink/renderer/core/layout/layout_text_fragment.h" |
| #include "third_party/blink/renderer/core/svg/svg_svg_element.h" |
| #include "third_party/blink/renderer/core/trustedtypes/trusted_html.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| #include "third_party/blink/renderer/platform/geometry/float_quad.h" |
| #include "third_party/blink/renderer/platform/runtime_enabled_features.h" |
| #include "third_party/blink/renderer/platform/wtf/text/cstring.h" |
| #include "third_party/blink/renderer/platform/wtf/text/string_builder.h" |
| #ifndef NDEBUG |
| #include <stdio.h> |
| #endif |
| |
| namespace blink { |
| |
| class RangeUpdateScope { |
| STACK_ALLOCATED(); |
| |
| public: |
| explicit RangeUpdateScope(Range* range) { |
| DCHECK(range); |
| if (++scope_count_ == 1) { |
| range_ = range; |
| old_document_ = range->OwnerDocument(); |
| #if DCHECK_IS_ON() |
| current_range_ = range; |
| } else { |
| DCHECK_EQ(current_range_, range); |
| #endif |
| } |
| } |
| |
| ~RangeUpdateScope() { |
| DCHECK_GE(scope_count_, 1); |
| if (--scope_count_ > 0) |
| return; |
| Settings* settings = old_document_->GetFrame() |
| ? old_document_->GetFrame()->GetSettings() |
| : nullptr; |
| if (!settings || |
| !settings->GetDoNotUpdateSelectionOnMutatingSelectionRange()) { |
| range_->RemoveFromSelectionIfInDifferentRoot(*old_document_); |
| range_->UpdateSelectionIfAddedToSelection(); |
| } |
| #if DCHECK_IS_ON() |
| current_range_ = nullptr; |
| #endif |
| } |
| |
| private: |
| static int scope_count_; |
| #if DCHECK_IS_ON() |
| // This raw pointer is safe because |
| // - s_currentRange has a valid pointer only if RangeUpdateScope instance is |
| // live. |
| // - RangeUpdateScope is used only in Range member functions. |
| static Range* current_range_; |
| #endif |
| Member<Range> range_; |
| Member<Document> old_document_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RangeUpdateScope); |
| }; |
| |
| int RangeUpdateScope::scope_count_ = 0; |
| #if DCHECK_IS_ON() |
| Range* RangeUpdateScope::current_range_; |
| #endif |
| |
| inline Range::Range(Document& owner_document) |
| : owner_document_(&owner_document), |
| start_(*owner_document_), |
| end_(*owner_document_) { |
| owner_document_->AttachRange(this); |
| } |
| |
| Range* Range::Create(Document& owner_document) { |
| return new Range(owner_document); |
| } |
| |
| inline Range::Range(Document& owner_document, |
| Node* start_container, |
| unsigned start_offset, |
| Node* end_container, |
| unsigned end_offset) |
| : owner_document_(&owner_document), |
| start_(*owner_document_), |
| end_(*owner_document_) { |
| owner_document_->AttachRange(this); |
| |
| // Simply setting the containers and offsets directly would not do any of the |
| // checking that setStart and setEnd do, so we call those functions. |
| setStart(start_container, start_offset); |
| setEnd(end_container, end_offset); |
| } |
| |
| Range* Range::Create(Document& owner_document, |
| Node* start_container, |
| unsigned start_offset, |
| Node* end_container, |
| unsigned end_offset) { |
| return new Range(owner_document, start_container, start_offset, end_container, |
| end_offset); |
| } |
| |
| Range* Range::Create(Document& owner_document, |
| const Position& start, |
| const Position& end) { |
| return new Range(owner_document, start.ComputeContainerNode(), |
| start.ComputeOffsetInContainerNode(), |
| end.ComputeContainerNode(), |
| end.ComputeOffsetInContainerNode()); |
| } |
| |
| void Range::Dispose() { |
| // A prompt detach from the owning Document helps avoid GC overhead. |
| owner_document_->DetachRange(this); |
| } |
| |
| bool Range::IsConnected() const { |
| DCHECK_EQ(start_.IsConnected(), end_.IsConnected()); |
| return start_.IsConnected(); |
| } |
| |
| void Range::SetDocument(Document& document) { |
| DCHECK_NE(owner_document_, document); |
| DCHECK(owner_document_); |
| owner_document_->DetachRange(this); |
| owner_document_ = &document; |
| start_.SetToStartOfNode(document); |
| end_.SetToStartOfNode(document); |
| owner_document_->AttachRange(this); |
| } |
| |
| Node* Range::commonAncestorContainer() const { |
| return commonAncestorContainer(&start_.Container(), &end_.Container()); |
| } |
| |
| Node* Range::commonAncestorContainer(const Node* container_a, |
| const Node* container_b) { |
| if (!container_a || !container_b) |
| return nullptr; |
| return container_a->CommonAncestor(*container_b, NodeTraversal::Parent); |
| } |
| |
| static inline bool CheckForDifferentRootContainer( |
| const RangeBoundaryPoint& start, |
| const RangeBoundaryPoint& end) { |
| Node* end_root_container = &end.Container(); |
| while (end_root_container->parentNode()) |
| end_root_container = end_root_container->parentNode(); |
| Node* start_root_container = &start.Container(); |
| while (start_root_container->parentNode()) |
| start_root_container = start_root_container->parentNode(); |
| |
| return start_root_container != end_root_container || |
| (Range::compareBoundaryPoints(start, end, ASSERT_NO_EXCEPTION) > 0); |
| } |
| |
| void Range::setStart(Node* ref_node, |
| unsigned offset, |
| ExceptionState& exception_state) { |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| RangeUpdateScope scope(this); |
| bool did_move_document = false; |
| if (ref_node->GetDocument() != owner_document_) { |
| SetDocument(ref_node->GetDocument()); |
| did_move_document = true; |
| } |
| |
| Node* child_node = CheckNodeWOffset(ref_node, offset, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| start_.Set(*ref_node, offset, child_node); |
| |
| if (did_move_document || CheckForDifferentRootContainer(start_, end_)) |
| collapse(true); |
| } |
| |
| void Range::setEnd(Node* ref_node, |
| unsigned offset, |
| ExceptionState& exception_state) { |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| RangeUpdateScope scope(this); |
| bool did_move_document = false; |
| if (ref_node->GetDocument() != owner_document_) { |
| SetDocument(ref_node->GetDocument()); |
| did_move_document = true; |
| } |
| |
| Node* child_node = CheckNodeWOffset(ref_node, offset, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| end_.Set(*ref_node, offset, child_node); |
| |
| if (did_move_document || CheckForDifferentRootContainer(start_, end_)) |
| collapse(false); |
| } |
| |
| void Range::setStart(const Position& start, ExceptionState& exception_state) { |
| Position parent_anchored = start.ParentAnchoredEquivalent(); |
| setStart(parent_anchored.ComputeContainerNode(), |
| parent_anchored.OffsetInContainerNode(), exception_state); |
| } |
| |
| void Range::setEnd(const Position& end, ExceptionState& exception_state) { |
| Position parent_anchored = end.ParentAnchoredEquivalent(); |
| setEnd(parent_anchored.ComputeContainerNode(), |
| parent_anchored.OffsetInContainerNode(), exception_state); |
| } |
| |
| void Range::collapse(bool to_start) { |
| RangeUpdateScope scope(this); |
| if (to_start) |
| end_ = start_; |
| else |
| start_ = end_; |
| } |
| |
| bool Range::HasSameRoot(const Node& node) const { |
| if (node.GetDocument() != owner_document_) |
| return false; |
| // commonAncestorContainer() is O(depth). We should avoid to call it in common |
| // cases. |
| if (node.IsInTreeScope() && start_.Container().IsInTreeScope() && |
| &node.GetTreeScope() == &start_.Container().GetTreeScope()) |
| return true; |
| return node.CommonAncestor(start_.Container(), NodeTraversal::Parent); |
| } |
| |
| bool Range::isPointInRange(Node* ref_node, |
| unsigned offset, |
| ExceptionState& exception_state) const { |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return false; |
| } |
| if (!HasSameRoot(*ref_node)) |
| return false; |
| |
| CheckNodeWOffset(ref_node, offset, exception_state); |
| if (exception_state.HadException()) |
| return false; |
| |
| return compareBoundaryPoints(ref_node, offset, &start_.Container(), |
| start_.Offset(), exception_state) >= 0 && |
| !exception_state.HadException() && |
| compareBoundaryPoints(ref_node, offset, &end_.Container(), |
| end_.Offset(), exception_state) <= 0 && |
| !exception_state.HadException(); |
| } |
| |
| short Range::comparePoint(Node* ref_node, |
| unsigned offset, |
| ExceptionState& exception_state) const { |
| // http://developer.mozilla.org/en/docs/DOM:range.comparePoint |
| // This method returns -1, 0 or 1 depending on if the point described by the |
| // refNode node and an offset within the node is before, same as, or after the |
| // range respectively. |
| |
| if (!HasSameRoot(*ref_node)) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kWrongDocumentError, |
| "The node provided and the Range are not in the same tree."); |
| return 0; |
| } |
| |
| CheckNodeWOffset(ref_node, offset, exception_state); |
| if (exception_state.HadException()) |
| return 0; |
| |
| // compare to start, and point comes before |
| if (compareBoundaryPoints(ref_node, offset, &start_.Container(), |
| start_.Offset(), exception_state) < 0) |
| return -1; |
| |
| if (exception_state.HadException()) |
| return 0; |
| |
| // compare to end, and point comes after |
| if (compareBoundaryPoints(ref_node, offset, &end_.Container(), end_.Offset(), |
| exception_state) > 0 && |
| !exception_state.HadException()) |
| return 1; |
| |
| // point is in the middle of this range, or on the boundary points |
| return 0; |
| } |
| |
| short Range::compareBoundaryPoints(unsigned how, |
| const Range* source_range, |
| ExceptionState& exception_state) const { |
| if (!(how == kStartToStart || how == kStartToEnd || how == kEndToEnd || |
| how == kEndToStart)) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kNotSupportedError, |
| "The comparison method provided must be " |
| "one of 'START_TO_START', 'START_TO_END', " |
| "'END_TO_END', or 'END_TO_START'."); |
| return 0; |
| } |
| |
| Node* this_cont = commonAncestorContainer(); |
| Node* source_cont = source_range->commonAncestorContainer(); |
| if (this_cont->GetDocument() != source_cont->GetDocument()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kWrongDocumentError, |
| "The source range is in a different document than this range."); |
| return 0; |
| } |
| |
| Node* this_top = this_cont; |
| Node* source_top = source_cont; |
| while (this_top->parentNode()) |
| this_top = this_top->parentNode(); |
| while (source_top->parentNode()) |
| source_top = source_top->parentNode(); |
| if (this_top != source_top) { // in different DocumentFragments |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kWrongDocumentError, |
| "The source range is in a different document than this range."); |
| return 0; |
| } |
| |
| switch (how) { |
| case kStartToStart: |
| return compareBoundaryPoints(start_, source_range->start_, |
| exception_state); |
| case kStartToEnd: |
| return compareBoundaryPoints(end_, source_range->start_, exception_state); |
| case kEndToEnd: |
| return compareBoundaryPoints(end_, source_range->end_, exception_state); |
| case kEndToStart: |
| return compareBoundaryPoints(start_, source_range->end_, exception_state); |
| } |
| |
| NOTREACHED(); |
| return 0; |
| } |
| |
| short Range::compareBoundaryPoints(Node* container_a, |
| unsigned offset_a, |
| Node* container_b, |
| unsigned offset_b, |
| ExceptionState& exception_state) { |
| bool disconnected = false; |
| short result = ComparePositionsInDOMTree(container_a, offset_a, container_b, |
| offset_b, &disconnected); |
| if (disconnected) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kWrongDocumentError, |
| "The two ranges are in separate documents."); |
| return 0; |
| } |
| return result; |
| } |
| |
| short Range::compareBoundaryPoints(const RangeBoundaryPoint& boundary_a, |
| const RangeBoundaryPoint& boundary_b, |
| ExceptionState& exception_state) { |
| return compareBoundaryPoints(&boundary_a.Container(), boundary_a.Offset(), |
| &boundary_b.Container(), boundary_b.Offset(), |
| exception_state); |
| } |
| |
| bool Range::BoundaryPointsValid() const { |
| DummyExceptionStateForTesting exception_state; |
| return compareBoundaryPoints(start_, end_, exception_state) <= 0 && |
| !exception_state.HadException(); |
| } |
| |
| void Range::deleteContents(ExceptionState& exception_state) { |
| DCHECK(BoundaryPointsValid()); |
| |
| { |
| EventQueueScope event_queue_scope; |
| ProcessContents(DELETE_CONTENTS, exception_state); |
| } |
| } |
| |
| bool Range::intersectsNode(Node* ref_node, ExceptionState& exception_state) { |
| // http://developer.mozilla.org/en/docs/DOM:range.intersectsNode |
| // Returns a bool if the node intersects the range. |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return false; |
| } |
| if (!HasSameRoot(*ref_node)) |
| return false; |
| |
| ContainerNode* parent_node = ref_node->parentNode(); |
| if (!parent_node) |
| return true; |
| |
| int node_index = ref_node->NodeIndex(); |
| return Position(parent_node, node_index) < end_.ToPosition() && |
| Position(parent_node, node_index + 1) > start_.ToPosition(); |
| } |
| |
| static inline Node* HighestAncestorUnderCommonRoot(Node* node, |
| Node* common_root) { |
| if (node == common_root) |
| return nullptr; |
| |
| DCHECK(common_root->contains(node)); |
| |
| while (node->parentNode() != common_root) |
| node = node->parentNode(); |
| |
| return node; |
| } |
| |
| static inline Node* ChildOfCommonRootBeforeOffset(Node* container, |
| unsigned offset, |
| Node* common_root) { |
| DCHECK(container); |
| DCHECK(common_root); |
| |
| if (!common_root->contains(container)) |
| return nullptr; |
| |
| if (container == common_root) { |
| container = container->firstChild(); |
| for (unsigned i = 0; container && i < offset; i++) |
| container = container->nextSibling(); |
| } else { |
| while (container->parentNode() != common_root) |
| container = container->parentNode(); |
| } |
| |
| return container; |
| } |
| |
| static unsigned LengthOfContents(const Node* node) { |
| // This switch statement must be consistent with that of |
| // Range::processContentsBetweenOffsets. |
| switch (node->getNodeType()) { |
| case Node::kTextNode: |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kProcessingInstructionNode: |
| return ToCharacterData(node)->length(); |
| case Node::kElementNode: |
| case Node::kDocumentNode: |
| case Node::kDocumentFragmentNode: |
| return ToContainerNode(node)->CountChildren(); |
| case Node::kAttributeNode: |
| case Node::kDocumentTypeNode: |
| return 0; |
| } |
| NOTREACHED(); |
| return 0; |
| } |
| |
| DocumentFragment* Range::ProcessContents(ActionType action, |
| ExceptionState& exception_state) { |
| typedef HeapVector<Member<Node>> NodeVector; |
| |
| DocumentFragment* fragment = nullptr; |
| if (action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) |
| fragment = DocumentFragment::Create(*owner_document_.Get()); |
| |
| if (collapsed()) |
| return fragment; |
| |
| Node* common_root = commonAncestorContainer(); |
| DCHECK(common_root); |
| |
| if (start_.Container() == end_.Container()) { |
| ProcessContentsBetweenOffsets(action, fragment, &start_.Container(), |
| start_.Offset(), end_.Offset(), |
| exception_state); |
| return fragment; |
| } |
| |
| // Since mutation observers can modify the range during the process, the |
| // boundary points need to be saved. |
| const RangeBoundaryPoint original_start(start_); |
| const RangeBoundaryPoint original_end(end_); |
| |
| // what is the highest node that partially selects the start / end of the |
| // range? |
| Node* partial_start = |
| HighestAncestorUnderCommonRoot(&original_start.Container(), common_root); |
| Node* partial_end = |
| HighestAncestorUnderCommonRoot(&original_end.Container(), common_root); |
| |
| // 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. |
| |
| Node* left_contents = nullptr; |
| if (original_start.Container() != common_root && |
| common_root->contains(&original_start.Container())) { |
| left_contents = ProcessContentsBetweenOffsets( |
| action, nullptr, &original_start.Container(), original_start.Offset(), |
| LengthOfContents(&original_start.Container()), exception_state); |
| left_contents = ProcessAncestorsAndTheirSiblings( |
| action, &original_start.Container(), kProcessContentsForward, |
| left_contents, common_root, exception_state); |
| } |
| |
| Node* right_contents = nullptr; |
| if (end_.Container() != common_root && |
| common_root->contains(&original_end.Container())) { |
| right_contents = ProcessContentsBetweenOffsets( |
| action, nullptr, &original_end.Container(), 0, original_end.Offset(), |
| exception_state); |
| right_contents = ProcessAncestorsAndTheirSiblings( |
| action, &original_end.Container(), kProcessContentsBackward, |
| right_contents, common_root, exception_state); |
| } |
| |
| // delete all children of commonRoot between the start and end container |
| Node* process_start = ChildOfCommonRootBeforeOffset( |
| &original_start.Container(), original_start.Offset(), common_root); |
| if (process_start && |
| original_start.Container() != |
| common_root) // processStart contains nodes before m_start. |
| process_start = process_start->nextSibling(); |
| Node* process_end = ChildOfCommonRootBeforeOffset( |
| &original_end.Container(), original_end.Offset(), common_root); |
| |
| // Collapse the range, making sure that the result is not within a node that |
| // was partially selected. |
| if (action == EXTRACT_CONTENTS || action == DELETE_CONTENTS) { |
| if (partial_start && common_root->contains(partial_start)) { |
| // FIXME: We should not continue if we have an earlier error. |
| exception_state.ClearException(); |
| setStart(partial_start->parentNode(), partial_start->NodeIndex() + 1, |
| exception_state); |
| } else if (partial_end && common_root->contains(partial_end)) { |
| // FIXME: We should not continue if we have an earlier error. |
| exception_state.ClearException(); |
| setStart(partial_end->parentNode(), partial_end->NodeIndex(), |
| exception_state); |
| } |
| if (exception_state.HadException()) |
| return nullptr; |
| end_ = start_; |
| } |
| |
| // Now add leftContents, stuff in between, and rightContents to the fragment |
| // (or just delete the stuff in between) |
| |
| if ((action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) && left_contents) |
| fragment->AppendChild(left_contents, exception_state); |
| |
| if (process_start) { |
| NodeVector nodes; |
| for (Node* n = process_start; n && n != process_end; n = n->nextSibling()) |
| nodes.push_back(n); |
| ProcessNodes(action, nodes, common_root, fragment, exception_state); |
| } |
| |
| if ((action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) && |
| right_contents) |
| fragment->AppendChild(right_contents, exception_state); |
| |
| return fragment; |
| } |
| |
| static inline void DeleteCharacterData(CharacterData* data, |
| unsigned start_offset, |
| unsigned end_offset, |
| ExceptionState& exception_state) { |
| if (data->length() - end_offset) |
| data->deleteData(end_offset, data->length() - end_offset, exception_state); |
| if (start_offset) |
| data->deleteData(0, start_offset, exception_state); |
| } |
| |
| Node* Range::ProcessContentsBetweenOffsets(ActionType action, |
| DocumentFragment* fragment, |
| Node* container, |
| unsigned start_offset, |
| unsigned end_offset, |
| ExceptionState& exception_state) { |
| DCHECK(container); |
| DCHECK_LE(start_offset, end_offset); |
| |
| // This switch statement must be consistent with that of |
| // lengthOfContents. |
| Node* result = nullptr; |
| switch (container->getNodeType()) { |
| case Node::kTextNode: |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kProcessingInstructionNode: |
| end_offset = std::min(end_offset, ToCharacterData(container)->length()); |
| if (action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) { |
| CharacterData* c = |
| static_cast<CharacterData*>(container->cloneNode(true)); |
| DeleteCharacterData(c, start_offset, end_offset, exception_state); |
| if (fragment) { |
| result = fragment; |
| result->appendChild(c, exception_state); |
| } else { |
| result = c; |
| } |
| } |
| if (action == EXTRACT_CONTENTS || action == DELETE_CONTENTS) |
| ToCharacterData(container)->deleteData( |
| start_offset, end_offset - start_offset, exception_state); |
| break; |
| case Node::kElementNode: |
| case Node::kAttributeNode: |
| case Node::kDocumentNode: |
| case Node::kDocumentTypeNode: |
| case Node::kDocumentFragmentNode: |
| // FIXME: Should we assert that some nodes never appear here? |
| if (action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) { |
| if (fragment) |
| result = fragment; |
| else |
| result = container->cloneNode(false); |
| } |
| |
| Node* n = container->firstChild(); |
| HeapVector<Member<Node>> nodes; |
| for (unsigned i = start_offset; n && i; i--) |
| n = n->nextSibling(); |
| for (unsigned i = start_offset; n && i < end_offset; |
| i++, n = n->nextSibling()) |
| nodes.push_back(n); |
| |
| ProcessNodes(action, nodes, container, result, exception_state); |
| break; |
| } |
| |
| return result; |
| } |
| |
| void Range::ProcessNodes(ActionType action, |
| HeapVector<Member<Node>>& nodes, |
| Node* old_container, |
| Node* new_container, |
| ExceptionState& exception_state) { |
| for (auto& node : nodes) { |
| switch (action) { |
| case DELETE_CONTENTS: |
| old_container->removeChild(node.Get(), exception_state); |
| break; |
| case EXTRACT_CONTENTS: |
| new_container->appendChild( |
| node.Release(), exception_state); // Will remove n from its parent. |
| break; |
| case CLONE_CONTENTS: |
| new_container->appendChild(node->cloneNode(true), exception_state); |
| break; |
| } |
| } |
| } |
| |
| Node* Range::ProcessAncestorsAndTheirSiblings( |
| ActionType action, |
| Node* container, |
| ContentsProcessDirection direction, |
| Node* cloned_container, |
| Node* common_root, |
| ExceptionState& exception_state) { |
| typedef HeapVector<Member<Node>> NodeVector; |
| |
| NodeVector ancestors; |
| for (Node& runner : NodeTraversal::AncestorsOf(*container)) { |
| if (runner == common_root) |
| break; |
| ancestors.push_back(runner); |
| } |
| |
| Node* first_child_in_ancestor_to_process = |
| direction == kProcessContentsForward ? container->nextSibling() |
| : container->previousSibling(); |
| for (const auto& ancestor : ancestors) { |
| if (action == EXTRACT_CONTENTS || action == CLONE_CONTENTS) { |
| // Might have been removed already during mutation event. |
| if (Node* cloned_ancestor = ancestor->cloneNode(false)) { |
| cloned_ancestor->appendChild(cloned_container, exception_state); |
| cloned_container = cloned_ancestor; |
| } |
| } |
| |
| // 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 |
| DCHECK(!first_child_in_ancestor_to_process || |
| first_child_in_ancestor_to_process->parentNode() == ancestor); |
| |
| NodeVector nodes; |
| for (Node* child = first_child_in_ancestor_to_process; child; |
| child = (direction == kProcessContentsForward) |
| ? child->nextSibling() |
| : child->previousSibling()) |
| nodes.push_back(child); |
| |
| for (const auto& node : nodes) { |
| Node* child = node.Get(); |
| switch (action) { |
| case DELETE_CONTENTS: |
| // Prior call of ancestor->removeChild() may cause a tree change due |
| // to DOMSubtreeModified event. Therefore, we need to make sure |
| // |ancestor| is still |child|'s parent. |
| if (ancestor == child->parentNode()) |
| ancestor->removeChild(child, exception_state); |
| break; |
| case EXTRACT_CONTENTS: // will remove child from ancestor |
| if (direction == kProcessContentsForward) |
| cloned_container->appendChild(child, exception_state); |
| else |
| cloned_container->insertBefore( |
| child, cloned_container->firstChild(), exception_state); |
| break; |
| case CLONE_CONTENTS: |
| if (direction == kProcessContentsForward) |
| cloned_container->appendChild(child->cloneNode(true), |
| exception_state); |
| else |
| cloned_container->insertBefore(child->cloneNode(true), |
| cloned_container->firstChild(), |
| exception_state); |
| break; |
| } |
| } |
| first_child_in_ancestor_to_process = direction == kProcessContentsForward |
| ? ancestor->nextSibling() |
| : ancestor->previousSibling(); |
| } |
| |
| return cloned_container; |
| } |
| |
| DocumentFragment* Range::extractContents(ExceptionState& exception_state) { |
| CheckExtractPrecondition(exception_state); |
| if (exception_state.HadException()) |
| return nullptr; |
| |
| EventQueueScope scope; |
| DocumentFragment* fragment = ProcessContents(EXTRACT_CONTENTS, |
| exception_state); |
| // |extractContents| has extended attributes [NewObject, DoNotTestNewObject], |
| // so it's better to have a test that exercises the following condition: |
| // |
| // !fragment || DOMDataStore::GetWrapper(fragment, isolate).IsEmpty() |
| // |
| // however, there is no access to |isolate| so far. So, we simply omit the |
| // test so far. |
| return fragment; |
| } |
| |
| DocumentFragment* Range::cloneContents(ExceptionState& exception_state) { |
| return ProcessContents(CLONE_CONTENTS, exception_state); |
| } |
| |
| // https://dom.spec.whatwg.org/#concept-range-insert |
| void Range::insertNode(Node* new_node, ExceptionState& exception_state) { |
| if (!new_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| // 1. If range’s start node is a ProcessingInstruction or Comment node, is a |
| // Text node whose parent is null, or is node, then throw a |
| // HierarchyRequestError. |
| Node& start_node = start_.Container(); |
| if (start_node.getNodeType() == Node::kProcessingInstructionNode || |
| start_node.getNodeType() == Node::kCommentNode) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kHierarchyRequestError, |
| "Nodes of type '" + new_node->nodeName() + |
| "' may not be inserted inside nodes of type '" + |
| start_node.nodeName() + "'."); |
| return; |
| } |
| const bool start_is_text = start_node.IsTextNode(); |
| if (start_is_text && !start_node.parentNode()) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kHierarchyRequestError, |
| "This operation would split a text node, " |
| "but there's no parent into which to " |
| "insert."); |
| return; |
| } |
| if (start_node == new_node) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kHierarchyRequestError, |
| "Unable to insert a node into a Range starting from the node itself."); |
| return; |
| } |
| |
| // According to the specification, the following condition is checked in the |
| // step 6. However our EnsurePreInsertionValidity() supports only |
| // ContainerNode parent. |
| if (start_node.IsAttributeNode()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kHierarchyRequestError, |
| "Nodes of type '" + new_node->nodeName() + |
| "' may not be inserted inside nodes of type 'Attr'."); |
| return; |
| } |
| |
| // 2. Let referenceNode be null. |
| Node* reference_node = nullptr; |
| // 3. If range’s start node is a Text node, set referenceNode to that Text |
| // node. |
| // 4. Otherwise, set referenceNode to the child of start node whose index is |
| // start offset, and null if there is no such child. |
| if (start_is_text) |
| reference_node = &start_node; |
| else |
| reference_node = NodeTraversal::ChildAt(start_node, start_.Offset()); |
| |
| // 5. Let parent be range’s start node if referenceNode is null, and |
| // referenceNode’s parent otherwise. |
| ContainerNode& parent = reference_node ? *reference_node->parentNode() |
| : ToContainerNode(start_node); |
| |
| // 6. Ensure pre-insertion validity of node into parent before referenceNode. |
| if (!parent.EnsurePreInsertionValidity(*new_node, reference_node, nullptr, |
| exception_state)) |
| return; |
| |
| EventQueueScope scope; |
| // 7. If range's start node is a Text node, set referenceNode to the result of |
| // splitting it with offset range’s start offset. |
| if (start_is_text) { |
| reference_node = |
| ToText(start_node).splitText(start_.Offset(), exception_state); |
| if (exception_state.HadException()) |
| return; |
| } |
| |
| // 8. If node is referenceNode, set referenceNode to its next sibling. |
| if (new_node == reference_node) |
| reference_node = reference_node->nextSibling(); |
| |
| // 9. If node's parent is not null, remove node from its parent. |
| if (new_node->parentNode()) { |
| new_node->remove(exception_state); |
| if (exception_state.HadException()) |
| return; |
| } |
| |
| // 10. Let newOffset be parent's length if referenceNode is null, and |
| // referenceNode's index otherwise. |
| unsigned new_offset = |
| reference_node ? reference_node->NodeIndex() : LengthOfContents(&parent); |
| |
| // 11. Increase newOffset by node's length if node is a DocumentFragment node, |
| // and one otherwise. |
| new_offset += new_node->IsDocumentFragment() ? LengthOfContents(new_node) : 1; |
| |
| // 12. Pre-insert node into parent before referenceNode. |
| parent.insertBefore(new_node, reference_node, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| // 13. If range's start and end are the same, set range's end to (parent, |
| // newOffset). |
| if (start_ == end_) |
| setEnd(&parent, new_offset, exception_state); |
| } |
| |
| String Range::toString() const { |
| StringBuilder builder; |
| |
| Node* past_last = PastLastNode(); |
| for (Node* n = FirstNode(); n != past_last; n = NodeTraversal::Next(*n)) { |
| Node::NodeType type = n->getNodeType(); |
| if (type == Node::kTextNode || type == Node::kCdataSectionNode) { |
| String data = ToCharacterData(n)->data(); |
| unsigned length = data.length(); |
| unsigned start = |
| (n == start_.Container()) ? std::min(start_.Offset(), length) : 0; |
| unsigned end = (n == end_.Container()) |
| ? std::min(std::max(start, end_.Offset()), length) |
| : length; |
| builder.Append(data, start, end - start); |
| } |
| } |
| |
| return builder.ToString(); |
| } |
| |
| String Range::GetText() const { |
| DCHECK(!owner_document_->NeedsLayoutTreeUpdate()); |
| return PlainText(EphemeralRange(this), |
| TextIteratorBehavior::Builder() |
| .SetEmitsObjectReplacementCharacter(true) |
| .Build()); |
| } |
| |
| DocumentFragment* Range::createContextualFragment( |
| const StringOrTrustedHTML& string_or_html, |
| ExceptionState& exception_state) { |
| // Algorithm: |
| // http://domparsing.spec.whatwg.org/#extensions-to-the-range-interface |
| |
| DCHECK(!string_or_html.IsNull()); |
| |
| Document& document = start_.Container().GetDocument(); |
| |
| String markup = |
| TrustedHTML::GetString(string_or_html, &document, exception_state); |
| if (!exception_state.HadException()) { |
| return createContextualFragmentFromString(markup, exception_state); |
| } |
| return nullptr; |
| } |
| |
| DocumentFragment* Range::createContextualFragmentFromString( |
| const String& markup, |
| ExceptionState& exception_state) { |
| // Algorithm: |
| // http://domparsing.spec.whatwg.org/#extensions-to-the-range-interface |
| |
| Node* node = &start_.Container(); |
| |
| // Step 1. |
| Element* element; |
| if (!start_.Offset() && |
| (node->IsDocumentNode() || node->IsDocumentFragment())) |
| element = nullptr; |
| else if (node->IsElementNode()) |
| element = ToElement(node); |
| else |
| element = node->parentElement(); |
| |
| // Step 2. |
| if (!element || IsHTMLHtmlElement(element)) { |
| Document& document = node->GetDocument(); |
| |
| if (document.IsSVGDocument()) { |
| element = document.documentElement(); |
| if (!element) |
| element = SVGSVGElement::Create(document); |
| } else { |
| // Optimization over spec: try to reuse the existing <body> element, if it |
| // is available. |
| element = document.body(); |
| if (!element) |
| element = HTMLBodyElement::Create(document); |
| } |
| } |
| |
| // Steps 3, 4, 5. |
| return blink::CreateContextualFragment( |
| markup, element, kAllowScriptingContentAndDoNotMarkAlreadyStarted, |
| exception_state); |
| } |
| |
| void Range::detach() { |
| // This is now a no-op as per the DOM specification. |
| } |
| |
| Node* Range::CheckNodeWOffset(Node* n, |
| unsigned offset, |
| ExceptionState& exception_state) { |
| switch (n->getNodeType()) { |
| case Node::kDocumentTypeNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + n->nodeName() + "'."); |
| return nullptr; |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kTextNode: |
| if (offset > ToCharacterData(n)->length()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + |
| " is larger than the node's length (" + |
| String::Number(ToCharacterData(n)->length()) + ")."); |
| } else if (offset > |
| static_cast<unsigned>(std::numeric_limits<int>::max())) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + " is invalid."); |
| } |
| return nullptr; |
| case Node::kProcessingInstructionNode: |
| if (offset > ToProcessingInstruction(n)->data().length()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + |
| " is larger than the node's length (" + |
| String::Number(ToProcessingInstruction(n)->data().length()) + |
| ")."); |
| } else if (offset > |
| static_cast<unsigned>(std::numeric_limits<int>::max())) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + " is invalid."); |
| } |
| return nullptr; |
| case Node::kAttributeNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| case Node::kElementNode: { |
| if (!offset) |
| return nullptr; |
| if (offset > static_cast<unsigned>(std::numeric_limits<int>::max())) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + " is invalid."); |
| return nullptr; |
| } |
| Node* child_before = NodeTraversal::ChildAt(*n, offset - 1); |
| if (!child_before) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "There is no child at offset " + String::Number(offset) + "."); |
| } |
| return child_before; |
| } |
| } |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| void Range::CheckNodeBA(Node* n, ExceptionState& exception_state) const { |
| if (!n) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| // InvalidNodeTypeError: Raised if the root container of refNode is not an |
| // Attr, Document, DocumentFragment or ShadowRoot node, or part of a SVG |
| // shadow DOM tree, or if refNode is a Document, DocumentFragment, ShadowRoot, |
| // Attr, Entity, or Notation node. |
| |
| if (!n->parentNode()) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kInvalidNodeTypeError, |
| "the given Node has no parent."); |
| return; |
| } |
| |
| switch (n->getNodeType()) { |
| case Node::kAttributeNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + n->nodeName() + "'."); |
| return; |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kDocumentTypeNode: |
| case Node::kElementNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| break; |
| } |
| |
| Node* root = n; |
| while (ContainerNode* parent = root->parentNode()) |
| root = parent; |
| |
| switch (root->getNodeType()) { |
| case Node::kAttributeNode: |
| case Node::kDocumentNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kElementNode: |
| break; |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kDocumentTypeNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + n->nodeName() + "'."); |
| return; |
| } |
| } |
| |
| Range* Range::cloneRange() const { |
| return Range::Create(*owner_document_.Get(), &start_.Container(), |
| start_.Offset(), &end_.Container(), end_.Offset()); |
| } |
| |
| void Range::setStartAfter(Node* ref_node, ExceptionState& exception_state) { |
| CheckNodeBA(ref_node, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| setStart(ref_node->parentNode(), ref_node->NodeIndex() + 1, exception_state); |
| } |
| |
| void Range::setEndBefore(Node* ref_node, ExceptionState& exception_state) { |
| CheckNodeBA(ref_node, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| setEnd(ref_node->parentNode(), ref_node->NodeIndex(), exception_state); |
| } |
| |
| void Range::setEndAfter(Node* ref_node, ExceptionState& exception_state) { |
| CheckNodeBA(ref_node, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| setEnd(ref_node->parentNode(), ref_node->NodeIndex() + 1, exception_state); |
| } |
| |
| void Range::selectNode(Node* ref_node, ExceptionState& exception_state) { |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| if (!ref_node->parentNode()) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kInvalidNodeTypeError, |
| "the given Node has no parent."); |
| return; |
| } |
| |
| switch (ref_node->getNodeType()) { |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kDocumentTypeNode: |
| case Node::kElementNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| break; |
| case Node::kAttributeNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + ref_node->nodeName() + "'."); |
| return; |
| } |
| |
| RangeUpdateScope scope(this); |
| setStartBefore(ref_node); |
| setEndAfter(ref_node); |
| } |
| |
| void Range::selectNodeContents(Node* ref_node, |
| ExceptionState& exception_state) { |
| if (!ref_node) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| // InvalidNodeTypeError: Raised if refNode or an ancestor of refNode is an |
| // Entity, Notation |
| // or DocumentType node. |
| for (Node* n = ref_node; n; n = n->parentNode()) { |
| switch (n->getNodeType()) { |
| case Node::kAttributeNode: |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| case Node::kElementNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| break; |
| case Node::kDocumentTypeNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + ref_node->nodeName() + "'."); |
| return; |
| } |
| } |
| |
| RangeUpdateScope scope(this); |
| if (owner_document_ != ref_node->GetDocument()) |
| SetDocument(ref_node->GetDocument()); |
| |
| start_.SetToStartOfNode(*ref_node); |
| end_.SetToEndOfNode(*ref_node); |
| } |
| |
| bool Range::selectNodeContents(Node* ref_node, Position& start, Position& end) { |
| if (!ref_node) { |
| return false; |
| } |
| |
| for (Node* n = ref_node; n; n = n->parentNode()) { |
| switch (n->getNodeType()) { |
| case Node::kAttributeNode: |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| case Node::kElementNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| break; |
| case Node::kDocumentTypeNode: |
| return false; |
| } |
| } |
| |
| RangeBoundaryPoint start_boundary_point(*ref_node); |
| start_boundary_point.SetToStartOfNode(*ref_node); |
| start = start_boundary_point.ToPosition(); |
| RangeBoundaryPoint end_boundary_point(*ref_node); |
| end_boundary_point.SetToEndOfNode(*ref_node); |
| end = end_boundary_point.ToPosition(); |
| return true; |
| } |
| |
| // https://dom.spec.whatwg.org/#dom-range-surroundcontents |
| void Range::surroundContents(Node* new_parent, |
| ExceptionState& exception_state) { |
| if (!new_parent) { |
| // FIXME: Generated bindings code never calls with null, and neither should |
| // other callers! |
| exception_state.ThrowTypeError("The node provided is null."); |
| return; |
| } |
| |
| // 1. If a non-Text node is partially contained in the context object, then |
| // throw an InvalidStateError. |
| Node* start_non_text_container = &start_.Container(); |
| if (start_non_text_container->getNodeType() == Node::kTextNode) |
| start_non_text_container = start_non_text_container->parentNode(); |
| Node* end_non_text_container = &end_.Container(); |
| if (end_non_text_container->getNodeType() == Node::kTextNode) |
| end_non_text_container = end_non_text_container->parentNode(); |
| if (start_non_text_container != end_non_text_container) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidStateError, |
| "The Range has partially selected a non-Text node."); |
| return; |
| } |
| |
| // 2. If newParent is a Document, DocumentType, or DocumentFragment node, then |
| // throw an InvalidNodeTypeError. |
| switch (new_parent->getNodeType()) { |
| case Node::kAttributeNode: |
| case Node::kDocumentFragmentNode: |
| case Node::kDocumentNode: |
| case Node::kDocumentTypeNode: |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kInvalidNodeTypeError, |
| "The node provided is of type '" + new_parent->nodeName() + "'."); |
| return; |
| case Node::kCdataSectionNode: |
| case Node::kCommentNode: |
| case Node::kElementNode: |
| case Node::kProcessingInstructionNode: |
| case Node::kTextNode: |
| break; |
| } |
| |
| EventQueueScope scope; |
| |
| // 3. Let fragment be the result of extracting context object. |
| DocumentFragment* fragment = extractContents(exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| // 4. If newParent has children, replace all with null within newParent. |
| while (Node* n = new_parent->firstChild()) { |
| ToContainerNode(new_parent)->RemoveChild(n, exception_state); |
| if (exception_state.HadException()) |
| return; |
| } |
| |
| // 5. If newParent has children, replace all with null within newParent. |
| insertNode(new_parent, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| // 6. Append fragment to newParent. |
| new_parent->appendChild(fragment, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| // 7. Select newParent within context object. |
| selectNode(new_parent, exception_state); |
| } |
| |
| void Range::setStartBefore(Node* ref_node, ExceptionState& exception_state) { |
| CheckNodeBA(ref_node, exception_state); |
| if (exception_state.HadException()) |
| return; |
| |
| setStart(ref_node->parentNode(), ref_node->NodeIndex(), exception_state); |
| } |
| |
| void Range::CheckExtractPrecondition(ExceptionState& exception_state) { |
| DCHECK(BoundaryPointsValid()); |
| |
| if (!commonAncestorContainer()) |
| return; |
| |
| Node* past_last = PastLastNode(); |
| for (Node* n = FirstNode(); n != past_last; n = NodeTraversal::Next(*n)) { |
| if (n->IsDocumentTypeNode()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kHierarchyRequestError, |
| "The Range contains a doctype node."); |
| return; |
| } |
| } |
| } |
| |
| Node* Range::FirstNode() const { |
| return StartPosition().NodeAsRangeFirstNode(); |
| } |
| |
| Node* Range::PastLastNode() const { |
| return EndPosition().NodeAsRangePastLastNode(); |
| } |
| |
| IntRect Range::BoundingBox() const { |
| return ComputeTextRect(EphemeralRange(this)); |
| } |
| |
| bool AreRangesEqual(const Range* a, const Range* b) { |
| if (a == b) |
| return true; |
| if (!a || !b) |
| return false; |
| return a->StartPosition() == b->StartPosition() && |
| a->EndPosition() == b->EndPosition(); |
| } |
| |
| static inline void BoundaryNodeChildrenWillBeRemoved( |
| RangeBoundaryPoint& boundary, |
| ContainerNode& container) { |
| for (Node* node_to_be_removed = container.firstChild(); node_to_be_removed; |
| node_to_be_removed = node_to_be_removed->nextSibling()) { |
| if (boundary.ChildBefore() == node_to_be_removed) { |
| boundary.SetToStartOfNode(container); |
| return; |
| } |
| |
| for (Node* n = &boundary.Container(); n; n = n->parentNode()) { |
| if (n == node_to_be_removed) { |
| boundary.SetToStartOfNode(container); |
| return; |
| } |
| } |
| } |
| } |
| |
| void Range::NodeChildrenWillBeRemoved(ContainerNode& container) { |
| DCHECK_EQ(container.GetDocument(), owner_document_); |
| BoundaryNodeChildrenWillBeRemoved(start_, container); |
| BoundaryNodeChildrenWillBeRemoved(end_, container); |
| } |
| |
| static inline void BoundaryNodeWillBeRemoved(RangeBoundaryPoint& boundary, |
| Node& node_to_be_removed) { |
| if (boundary.ChildBefore() == node_to_be_removed) { |
| boundary.ChildBeforeWillBeRemoved(); |
| return; |
| } |
| |
| for (Node* n = &boundary.Container(); n; n = n->parentNode()) { |
| if (n == node_to_be_removed) { |
| boundary.SetToBeforeChild(node_to_be_removed); |
| return; |
| } |
| } |
| } |
| |
| void Range::NodeWillBeRemoved(Node& node) { |
| DCHECK_EQ(node.GetDocument(), owner_document_); |
| DCHECK_NE(node, owner_document_.Get()); |
| |
| // FIXME: Once DOMNodeRemovedFromDocument mutation event removed, we |
| // should change following if-statement to DCHECK(!node->parentNode). |
| if (!node.parentNode()) |
| return; |
| BoundaryNodeWillBeRemoved(start_, node); |
| BoundaryNodeWillBeRemoved(end_, node); |
| } |
| |
| static inline void BoundaryTextInserted(RangeBoundaryPoint& boundary, |
| const CharacterData& text, |
| unsigned offset, |
| unsigned length) { |
| if (boundary.Container() != &text) |
| return; |
| boundary.MarkValid(); |
| unsigned boundary_offset = boundary.Offset(); |
| if (offset >= boundary_offset) |
| return; |
| boundary.SetOffset(boundary_offset + length); |
| } |
| |
| void Range::DidInsertText(const CharacterData& text, |
| unsigned offset, |
| unsigned length) { |
| DCHECK_EQ(text.GetDocument(), owner_document_); |
| BoundaryTextInserted(start_, text, offset, length); |
| BoundaryTextInserted(end_, text, offset, length); |
| } |
| |
| static inline void BoundaryTextRemoved(RangeBoundaryPoint& boundary, |
| const CharacterData& text, |
| unsigned offset, |
| unsigned length) { |
| if (boundary.Container() != &text) |
| return; |
| boundary.MarkValid(); |
| unsigned boundary_offset = boundary.Offset(); |
| if (offset >= boundary_offset) |
| return; |
| if (offset + length >= boundary_offset) |
| boundary.SetOffset(offset); |
| else |
| boundary.SetOffset(boundary_offset - length); |
| } |
| |
| void Range::DidRemoveText(const CharacterData& text, |
| unsigned offset, |
| unsigned length) { |
| DCHECK_EQ(text.GetDocument(), owner_document_); |
| BoundaryTextRemoved(start_, text, offset, length); |
| BoundaryTextRemoved(end_, text, offset, length); |
| } |
| |
| static inline void BoundaryTextNodesMerged(RangeBoundaryPoint& boundary, |
| const NodeWithIndex& old_node, |
| unsigned offset) { |
| if (boundary.Container() == old_node.GetNode()) { |
| Node* const previous_sibling = old_node.GetNode().previousSibling(); |
| DCHECK(previous_sibling); |
| boundary.Set(*previous_sibling, boundary.Offset() + offset, nullptr); |
| } else if (boundary.Container() == old_node.GetNode().parentNode() && |
| boundary.Offset() == static_cast<unsigned>(old_node.Index())) { |
| Node* const previous_sibling = old_node.GetNode().previousSibling(); |
| DCHECK(previous_sibling); |
| boundary.Set(*previous_sibling, offset, nullptr); |
| } |
| } |
| |
| void Range::DidMergeTextNodes(const NodeWithIndex& old_node, unsigned offset) { |
| DCHECK_EQ(old_node.GetNode().GetDocument(), owner_document_); |
| DCHECK(old_node.GetNode().parentNode()); |
| DCHECK(old_node.GetNode().IsTextNode()); |
| DCHECK(old_node.GetNode().previousSibling()); |
| DCHECK(old_node.GetNode().previousSibling()->IsTextNode()); |
| BoundaryTextNodesMerged(start_, old_node, offset); |
| BoundaryTextNodesMerged(end_, old_node, offset); |
| } |
| |
| void Range::UpdateOwnerDocumentIfNeeded() { |
| Document& new_document = start_.Container().GetDocument(); |
| DCHECK_EQ(new_document, end_.Container().GetDocument()); |
| if (new_document == owner_document_) |
| return; |
| owner_document_->DetachRange(this); |
| owner_document_ = &new_document; |
| owner_document_->AttachRange(this); |
| } |
| |
| static inline void BoundaryTextNodeSplit(RangeBoundaryPoint& boundary, |
| const Text& old_node) { |
| unsigned boundary_offset = boundary.Offset(); |
| if (boundary.ChildBefore() == &old_node) { |
| boundary.Set(boundary.Container(), boundary_offset + 1, |
| old_node.nextSibling()); |
| } else if (boundary.Container() == &old_node && |
| boundary_offset > old_node.length()) { |
| Node* const next_sibling = old_node.nextSibling(); |
| DCHECK(next_sibling); |
| boundary.Set(*next_sibling, boundary_offset - old_node.length(), nullptr); |
| } |
| } |
| |
| void Range::DidSplitTextNode(const Text& old_node) { |
| DCHECK_EQ(old_node.GetDocument(), owner_document_); |
| DCHECK(old_node.parentNode()); |
| DCHECK(old_node.nextSibling()); |
| DCHECK(old_node.nextSibling()->IsTextNode()); |
| BoundaryTextNodeSplit(start_, old_node); |
| BoundaryTextNodeSplit(end_, old_node); |
| DCHECK(BoundaryPointsValid()); |
| } |
| |
| void Range::expand(const String& unit, ExceptionState& exception_state) { |
| if (!StartPosition().IsConnected() || !EndPosition().IsConnected()) |
| return; |
| owner_document_->UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| VisiblePosition start = CreateVisiblePosition(StartPosition()); |
| VisiblePosition end = CreateVisiblePosition(EndPosition()); |
| if (unit == "word") { |
| start = StartOfWord(start); |
| end = EndOfWord(end); |
| } else if (unit == "sentence") { |
| start = StartOfSentence(start); |
| end = EndOfSentence(end); |
| } else if (unit == "block") { |
| start = StartOfParagraph(start); |
| end = EndOfParagraph(end); |
| } else if (unit == "document") { |
| start = StartOfDocument(start); |
| end = EndOfDocument(end); |
| } else { |
| return; |
| } |
| setStart(start.DeepEquivalent().ComputeContainerNode(), |
| start.DeepEquivalent().ComputeOffsetInContainerNode(), |
| exception_state); |
| setEnd(end.DeepEquivalent().ComputeContainerNode(), |
| end.DeepEquivalent().ComputeOffsetInContainerNode(), exception_state); |
| } |
| |
| DOMRectList* Range::getClientRects() const { |
| owner_document_->UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| Vector<FloatQuad> quads; |
| GetBorderAndTextQuads(quads); |
| |
| return DOMRectList::Create(quads); |
| } |
| |
| DOMRect* Range::getBoundingClientRect() const { |
| return DOMRect::FromFloatRect(BoundingRect()); |
| } |
| |
| // TODO(editing-dev): We should make |
| // |Document::AdjustFloatQuadsForScrollAndAbsoluteZoom()| as const function |
| // and takes |const LayoutObject&|. |
| static Vector<FloatQuad> ComputeTextQuads(const Document& owner_document, |
| const LayoutText& layout_text, |
| unsigned start_offset, |
| unsigned end_offset) { |
| Vector<FloatQuad> text_quads; |
| layout_text.AbsoluteQuadsForRange(text_quads, start_offset, end_offset); |
| const_cast<Document&>(owner_document) |
| .AdjustFloatQuadsForScrollAndAbsoluteZoom( |
| text_quads, const_cast<LayoutText&>(layout_text)); |
| return text_quads; |
| } |
| |
| // https://www.w3.org/TR/cssom-view-1/#dom-range-getclientrects |
| void Range::GetBorderAndTextQuads(Vector<FloatQuad>& quads) const { |
| Node* start_container = &start_.Container(); |
| Node* end_container = &end_.Container(); |
| Node* stop_node = PastLastNode(); |
| |
| // Stores the elements selected by the range. |
| HeapHashSet<Member<const Node>> selected_elements; |
| for (Node* node = FirstNode(); node != stop_node; |
| node = NodeTraversal::Next(*node)) { |
| if (!node->IsElementNode()) |
| continue; |
| if (selected_elements.Contains(node->parentNode()) || |
| (!node->contains(start_container) && !node->contains(end_container))) { |
| DCHECK_LE(StartPosition(), Position::BeforeNode(*node)); |
| DCHECK_GE(EndPosition(), Position::AfterNode(*node)); |
| selected_elements.insert(node); |
| } |
| } |
| |
| for (const Node* node = FirstNode(); node != stop_node; |
| node = NodeTraversal::Next(*node)) { |
| if (node->IsElementNode()) { |
| if (!selected_elements.Contains(node) || |
| selected_elements.Contains(node->parentNode())) |
| continue; |
| LayoutObject* const layout_object = ToElement(node)->GetLayoutObject(); |
| if (!layout_object) |
| continue; |
| Vector<FloatQuad> element_quads; |
| layout_object->AbsoluteQuads(element_quads); |
| owner_document_->AdjustFloatQuadsForScrollAndAbsoluteZoom(element_quads, |
| *layout_object); |
| |
| quads.AppendVector(element_quads); |
| continue; |
| } |
| |
| if (!node->IsTextNode()) |
| continue; |
| LayoutText* const layout_text = ToText(node)->GetLayoutObject(); |
| if (!layout_text) |
| continue; |
| if (!layout_text->IsTextFragment()) { |
| // TODO(editing-dev): Offset in |LayoutText| doesn't match to DOM offset |
| // when |text-transform| applied. We should map DOM offset to offset in |
| // |LayouText| for |start_offset| and |end_offset|. |
| const unsigned start_offset = |
| (node == start_container) ? start_.Offset() : 0; |
| const unsigned end_offset = (node == end_container) |
| ? end_.Offset() |
| : std::numeric_limits<unsigned>::max(); |
| quads.AppendVector(ComputeTextQuads(*owner_document_, *layout_text, |
| start_offset, end_offset)); |
| continue; |
| } |
| const LayoutTextFragment& first_letter_part = |
| *ToLayoutTextFragment(AssociatedLayoutObjectOf(*node, 0)); |
| const LayoutTextFragment& remaining_part = |
| *ToLayoutTextFragment(layout_text); |
| // Set offsets in |LayoutTextFragment| to cover whole text in |
| // |LayoutTextFragment|. |
| unsigned first_letter_part_start = 0; |
| unsigned first_letter_part_end = first_letter_part.FragmentLength(); |
| unsigned remaining_part_start = 0; |
| unsigned remaining_part_end = remaining_part.FragmentLength(); |
| if (node == start_container) { |
| if (start_.Offset() < first_letter_part_end) { |
| // |this| range starts in first-letter part. |
| first_letter_part_start = start_.Offset(); |
| } else { |
| first_letter_part_start = first_letter_part_end; |
| DCHECK_GE(static_cast<unsigned>(start_.Offset()), |
| remaining_part.Start()); |
| remaining_part_start = start_.Offset() - remaining_part.Start(); |
| } |
| } |
| if (node == end_container) { |
| if (end_.Offset() <= first_letter_part_end) { |
| // |this| range ends in first-letter part. |
| first_letter_part_end = end_.Offset(); |
| remaining_part_end = remaining_part_start; |
| } else { |
| DCHECK_GE(static_cast<unsigned>(end_.Offset()), remaining_part.Start()); |
| remaining_part_end = end_.Offset() - remaining_part.Start(); |
| } |
| } |
| DCHECK_LE(first_letter_part_start, first_letter_part_end); |
| DCHECK_LE(remaining_part_start, remaining_part_end); |
| if (first_letter_part_start < first_letter_part_end) { |
| quads.AppendVector(ComputeTextQuads(*owner_document_, first_letter_part, |
| first_letter_part_start, |
| first_letter_part_end)); |
| } |
| if (remaining_part_start < remaining_part_end) { |
| quads.AppendVector(ComputeTextQuads(*owner_document_, remaining_part, |
| remaining_part_start, |
| remaining_part_end)); |
| } |
| } |
| } |
| |
| FloatRect Range::BoundingRect() const { |
| owner_document_->UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| Vector<FloatQuad> quads; |
| GetBorderAndTextQuads(quads); |
| |
| FloatRect result; |
| for (const FloatQuad& quad : quads) |
| result.Unite(quad.BoundingBox()); // Skips empty rects. |
| |
| // If all rects are empty, return the first rect. |
| if (result.IsEmpty() && !quads.IsEmpty()) |
| return quads.front().BoundingBox(); |
| |
| return result; |
| } |
| |
| void Range::UpdateSelectionIfAddedToSelection() { |
| if (!OwnerDocument().GetFrame()) |
| return; |
| FrameSelection& selection = OwnerDocument().GetFrame()->Selection(); |
| if (this != selection.DocumentCachedRange()) |
| return; |
| DCHECK(startContainer()->isConnected()); |
| DCHECK(startContainer()->GetDocument() == OwnerDocument()); |
| DCHECK(endContainer()->isConnected()); |
| DCHECK(endContainer()->GetDocument() == OwnerDocument()); |
| EventDispatchForbiddenScope no_events; |
| selection.SetSelection(SelectionInDOMTree::Builder() |
| .Collapse(StartPosition()) |
| .Extend(EndPosition()) |
| .Build(), |
| SetSelectionOptions::Builder() |
| .SetShouldCloseTyping(true) |
| .SetShouldClearTypingStyle(true) |
| .SetDoNotSetFocus(true) |
| .Build()); |
| selection.CacheRangeOfDocument(this); |
| } |
| |
| void Range::RemoveFromSelectionIfInDifferentRoot(Document& old_document) { |
| if (!old_document.GetFrame()) |
| return; |
| FrameSelection& selection = old_document.GetFrame()->Selection(); |
| if (this != selection.DocumentCachedRange()) |
| return; |
| if (OwnerDocument() == old_document && startContainer()->isConnected() && |
| endContainer()->isConnected()) |
| return; |
| selection.Clear(); |
| selection.ClearDocumentCachedRange(); |
| } |
| |
| void Range::Trace(blink::Visitor* visitor) { |
| visitor->Trace(owner_document_); |
| visitor->Trace(start_); |
| visitor->Trace(end_); |
| ScriptWrappable::Trace(visitor); |
| } |
| |
| } // namespace blink |
| |
| #ifndef NDEBUG |
| |
| void showTree(const blink::Range* range) { |
| if (range && range->BoundaryPointsValid()) { |
| LOG(INFO) << "\n" |
| << range->startContainer() |
| ->ToMarkedTreeString(range->startContainer(), "S", |
| range->endContainer(), "E") |
| .Utf8() |
| .data() |
| << "start offset: " << range->startOffset() |
| << ", end offset: " << range->endOffset(); |
| } else { |
| LOG(INFO) << "Cannot show tree if range is null, or if boundary points are " |
| "invalid."; |
| } |
| } |
| |
| #endif |
