| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All |
| * rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "third_party/blink/renderer/core/dom/character_data.h" |
| |
| #include "base/numerics/checked_math.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/events/event.h" |
| #include "third_party/blink/renderer/core/dom/mutation_observer_interest_group.h" |
| #include "third_party/blink/renderer/core/dom/mutation_record.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/frame_selection.h" |
| #include "third_party/blink/renderer/core/events/mutation_event.h" |
| #include "third_party/blink/renderer/core/probe/core_probes.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| #include "third_party/blink/renderer/platform/bindings/parkable_string_manager.h" |
| #include "third_party/blink/renderer/platform/wtf/text/string_builder.h" |
| |
| namespace blink { |
| |
| void CharacterData::MakeParkable() { |
| if (is_parkable_) |
| return; |
| |
| parkable_data_ = ParkableString(data_.ReleaseImpl()); |
| data_ = String(); |
| is_parkable_ = true; |
| } |
| |
| void CharacterData::setData(const String& data) { |
| unsigned old_length = length(); |
| |
| SetDataAndUpdate(data, 0, old_length, data.length(), kUpdateFromNonParser); |
| GetDocument().DidRemoveText(*this, 0, old_length); |
| } |
| |
| String CharacterData::substringData(unsigned offset, |
| unsigned count, |
| ExceptionState& exception_state) { |
| if (offset > length()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + |
| " is greater than the node's length (" + String::Number(length()) + |
| ")."); |
| return String(); |
| } |
| |
| return data().Substring(offset, count); |
| } |
| |
| void CharacterData::ParserAppendData(const String& data) { |
| String new_str = this->data() + data; |
| |
| SetDataAndUpdate(new_str, this->data().length(), 0, data.length(), |
| kUpdateFromParser); |
| } |
| |
| void CharacterData::appendData(const String& data) { |
| String new_str = this->data() + data; |
| |
| SetDataAndUpdate(new_str, this->data().length(), 0, data.length(), |
| kUpdateFromNonParser); |
| |
| // FIXME: Should we call textInserted here? |
| } |
| |
| void CharacterData::insertData(unsigned offset, |
| const String& data, |
| ExceptionState& exception_state) { |
| if (offset > length()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + |
| " is greater than the node's length (" + String::Number(length()) + |
| ")."); |
| return; |
| } |
| |
| String current_data = this->data(); |
| StringBuilder new_str; |
| new_str.ReserveCapacity(data.length() + current_data.length()); |
| new_str.Append(StringView(current_data, 0, offset)); |
| new_str.Append(data); |
| new_str.Append(StringView(current_data, offset)); |
| |
| SetDataAndUpdate(new_str.ToString(), offset, 0, data.length(), |
| kUpdateFromNonParser); |
| |
| GetDocument().DidInsertText(*this, offset, data.length()); |
| } |
| |
| static bool ValidateOffsetCount(unsigned offset, |
| unsigned count, |
| unsigned length, |
| unsigned& real_count, |
| ExceptionState& exception_state) { |
| if (offset > length) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "The offset " + String::Number(offset) + |
| " is greater than the node's length (" + String::Number(length) + |
| ")."); |
| return false; |
| } |
| |
| base::CheckedNumeric<unsigned> offset_count = offset; |
| offset_count += count; |
| |
| if (!offset_count.IsValid() || offset + count > length) |
| real_count = length - offset; |
| else |
| real_count = count; |
| |
| return true; |
| } |
| |
| void CharacterData::deleteData(unsigned offset, |
| unsigned count, |
| ExceptionState& exception_state) { |
| unsigned real_count = 0; |
| if (!ValidateOffsetCount(offset, count, length(), real_count, |
| exception_state)) |
| return; |
| |
| String current_data = this->data(); |
| StringBuilder new_str; |
| new_str.ReserveCapacity(current_data.length() - real_count); |
| new_str.Append(StringView(current_data, 0, offset)); |
| new_str.Append(StringView(current_data, offset + real_count)); |
| SetDataAndUpdate(new_str.ToString(), offset, real_count, 0, |
| kUpdateFromNonParser); |
| |
| GetDocument().DidRemoveText(*this, offset, real_count); |
| } |
| |
| void CharacterData::replaceData(unsigned offset, |
| unsigned count, |
| const String& data, |
| ExceptionState& exception_state) { |
| unsigned real_count = 0; |
| if (!ValidateOffsetCount(offset, count, length(), real_count, |
| exception_state)) |
| return; |
| |
| String current_data = this->data(); |
| StringBuilder new_str; |
| new_str.ReserveCapacity(data.length() + current_data.length() - real_count); |
| new_str.Append(StringView(current_data, 0, offset)); |
| new_str.Append(data); |
| new_str.Append(StringView(current_data, offset + real_count)); |
| |
| SetDataAndUpdate(new_str.ToString(), offset, real_count, data.length(), |
| kUpdateFromNonParser); |
| |
| // update DOM ranges |
| GetDocument().DidRemoveText(*this, offset, real_count); |
| GetDocument().DidInsertText(*this, offset, data.length()); |
| } |
| |
| String CharacterData::nodeValue() const { |
| return data(); |
| } |
| |
| bool CharacterData::ContainsOnlyWhitespaceOrEmpty() const { |
| return data().ContainsOnlyWhitespaceOrEmpty(); |
| } |
| |
| void CharacterData::setNodeValue(const String& node_value) { |
| setData(!node_value.IsNull() ? node_value : g_empty_string); |
| } |
| |
| void CharacterData::SetDataAndUpdate(const String& new_data, |
| unsigned offset_of_replaced_data, |
| unsigned old_length, |
| unsigned new_length, |
| UpdateSource source) { |
| String old_data = this->data(); |
| if (is_parkable_) { |
| is_parkable_ = false; |
| parkable_data_ = ParkableString(); |
| } |
| data_ = new_data; |
| |
| DCHECK(!GetLayoutObject() || IsTextNode()); |
| if (auto* text_node = DynamicTo<Text>(this)) |
| text_node->UpdateTextLayoutObject(offset_of_replaced_data, old_length); |
| |
| if (source != kUpdateFromParser) { |
| if (auto* processing_instruction_node = |
| DynamicTo<ProcessingInstruction>(this)) |
| processing_instruction_node->DidAttributeChanged(); |
| |
| GetDocument().NotifyUpdateCharacterData(this, offset_of_replaced_data, |
| old_length, new_length); |
| } |
| |
| GetDocument().IncDOMTreeVersion(); |
| DidModifyData(old_data, source); |
| } |
| |
| void CharacterData::DidModifyData(const String& old_data, UpdateSource source) { |
| if (MutationObserverInterestGroup* mutation_recipients = |
| MutationObserverInterestGroup::CreateForCharacterDataMutation(*this)) |
| mutation_recipients->EnqueueMutationRecord( |
| MutationRecord::CreateCharacterData(this, old_data)); |
| |
| if (parentNode()) { |
| ContainerNode::ChildrenChange change = { |
| ContainerNode::ChildrenChangeType::kTextChanged, |
| source == kUpdateFromParser |
| ? ContainerNode::ChildrenChangeSource::kParser |
| : ContainerNode::ChildrenChangeSource::kAPI, |
| this, |
| previousSibling(), |
| nextSibling(), |
| {}, |
| old_data}; |
| parentNode()->ChildrenChanged(change); |
| } |
| |
| // Skip DOM mutation events if the modification is from parser. |
| // Note that mutation observer events will still fire. |
| // Spec: https://html.spec.whatwg.org/C/#insert-a-character |
| if (source != kUpdateFromParser && !IsInShadowTree()) { |
| if (GetDocument().HasListenerType( |
| Document::kDOMCharacterDataModifiedListener)) { |
| DispatchScopedEvent(*MutationEvent::Create( |
| event_type_names::kDOMCharacterDataModified, Event::Bubbles::kYes, |
| nullptr, old_data, data())); |
| } |
| DispatchSubtreeModifiedEvent(); |
| } |
| probe::CharacterDataModified(this); |
| } |
| |
| } // namespace blink |