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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 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.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/platform/bindings/parkable_string.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class ExceptionState;
class NodeCloningData;
struct TextDiffRange;
class CORE_EXPORT CharacterData : public Node {
DEFINE_WRAPPERTYPEINFO();
public:
CharacterData(const CharacterData&) = delete;
CharacterData& operator=(const CharacterData&) = delete;
// Makes the data Parkable. This enables de-duplication and compression.
void MakeParkable();
const String& data() const {
return is_parkable_ ? parkable_data_.ToString() : data_;
}
void setData(const String&);
unsigned length() const {
return is_parkable_ ? parkable_data_.length() : data_.length();
}
String substringData(unsigned offset, unsigned count, ExceptionState&);
void appendData(const String&);
void replaceData(unsigned offset,
unsigned count,
const String&,
ExceptionState&);
void insertData(unsigned offset, const String&, ExceptionState&);
void deleteData(unsigned offset, unsigned count, ExceptionState&);
bool ContainsOnlyWhitespaceOrEmpty() const;
void ParserAppendData(const String&);
protected:
CharacterData(TreeScope& tree_scope,
const String& text,
ConstructionType type)
: Node(&tree_scope, type),
data_(!text.IsNull() ? text : g_empty_string),
is_parkable_(false) {
DCHECK(type == kCreateComment || type == kCreateText ||
type == kCreateCdataSection ||
type == kCreateProcessingInstruction || type == kCreateEditingText);
}
CharacterData(TreeScope& tree_scope, String&& text, ConstructionType type)
: Node(&tree_scope, type), data_(std::move(text)), is_parkable_(false) {
DCHECK(type == kCreateComment || type == kCreateText ||
type == kCreateCdataSection ||
type == kCreateProcessingInstruction || type == kCreateEditingText);
DCHECK(!is_parkable_);
if (data_.IsNull()) {
data_ = g_empty_string;
}
}
~CharacterData() noexcept override {
if (is_parkable_) {
parkable_data_.~ParkableString();
} else {
data_.~String();
}
}
void SetDataWithoutUpdate(const String& data) {
DCHECK(!data.IsNull());
if (!is_parkable_) {
data_ = data;
return;
}
is_parkable_ = false;
parkable_data_.~ParkableString();
new (&data_) String(data);
}
enum UpdateSource {
kUpdateFromParser,
kUpdateFromNonParser,
};
void DidModifyData(const String& old_value, UpdateSource);
union {
ParkableString parkable_data_;
String data_;
};
bool is_parkable_;
private:
String nodeValue() const final;
void setNodeValue(const String&, ExceptionState&) final;
bool IsCharacterDataNode() const final { return true; }
void SetDataAndUpdate(const String&,
const TextDiffRange&,
UpdateSource = kUpdateFromNonParser);
Node* Clone(Document& factory,
NodeCloningData& data,
ContainerNode* append_to,
ExceptionState& append_exception_state) const override;
virtual CharacterData* CloneWithData(Document&, const String&) const = 0;
bool IsContainerNode() const =
delete; // This will catch anyone doing an unnecessary check.
bool IsElementNode() const =
delete; // This will catch anyone doing an unnecessary check.
};
template <>
struct DowncastTraits<CharacterData> {
static bool AllowFrom(const Node& node) { return node.IsCharacterDataNode(); }
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHARACTER_DATA_H_
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