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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_INDEXEDDB_IDB_KEY_RANGE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_INDEXEDDB_IDB_KEY_RANGE_H_
#include <memory>
#include <utility>
#include "base/memory/raw_ptr.h"
#include "third_party/blink/renderer/modules/indexeddb/idb_key.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
namespace blink {
class ExceptionState;
class ExecutionContext;
class ScriptState;
class ScriptValue;
class MODULES_EXPORT IDBKeyRange final : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
enum LowerBoundType { kLowerBoundOpen, kLowerBoundClosed };
enum UpperBoundType { kUpperBoundOpen, kUpperBoundClosed };
static IDBKeyRange* Create(const IDBKey* key) {
std::unique_ptr<IDBKey> lower_key = IDBKey::Clone(key);
std::unique_ptr<IDBKey> upper_key = IDBKey::Clone(key);
return IDBKeyRange::Create(std::move(lower_key), std::move(upper_key),
kLowerBoundClosed, kUpperBoundClosed);
}
static IDBKeyRange* Create(std::unique_ptr<IDBKey> lower,
std::unique_ptr<IDBKey> upper,
LowerBoundType lower_type,
UpperBoundType upper_type) {
if ((!lower || !lower->IsValid()) && (!upper || !upper->IsValid()))
return nullptr;
IDBKey* upper_compressed = upper.get();
return MakeGarbageCollected<IDBKeyRange>(std::move(lower), upper_compressed,
std::move(upper), lower_type,
upper_type);
}
IDBKeyRange(std::unique_ptr<IDBKey> lower,
IDBKey* upper,
std::unique_ptr<IDBKey> upper_if_distinct,
LowerBoundType lower_type,
UpperBoundType upper_type);
// Null if the script value is null or undefined, the range if it is one,
// otherwise tries to convert to a key and throws if it fails.
static IDBKeyRange* FromScriptValue(ExecutionContext*,
const ScriptValue&,
ExceptionState&);
void Trace(Visitor* visitor) const override {
ScriptWrappable::Trace(visitor);
}
// Implement the IDBKeyRange IDL
IDBKey* Lower() const { return lower_.get(); }
IDBKey* Upper() const { return upper_; }
ScriptValue LowerValue(ScriptState*) const;
ScriptValue UpperValue(ScriptState*) const;
bool lowerOpen() const { return lower_type_ == kLowerBoundOpen; }
bool upperOpen() const { return upper_type_ == kUpperBoundOpen; }
static IDBKeyRange* only(ScriptState*,
const ScriptValue& key,
ExceptionState&);
static IDBKeyRange* lowerBound(ScriptState*,
const ScriptValue& bound,
bool open,
ExceptionState&);
static IDBKeyRange* upperBound(ScriptState*,
const ScriptValue& bound,
bool open,
ExceptionState&);
static IDBKeyRange* bound(ScriptState*,
const ScriptValue& lower,
const ScriptValue& upper,
bool lower_open,
bool upper_open,
ExceptionState&);
static IDBKeyRange* only(std::unique_ptr<IDBKey> value, ExceptionState&);
bool includes(ScriptState*, const ScriptValue& key, ExceptionState&);
private:
// IDBKeyRange has two possible internal representations of keys.
//
// The normal representation uses distinct IDBKey instances for the lower and
// upper keys. In this case, upper_if_distinct_ owns the upper key, and upper_
// points to it.
//
// The compressed representation uses the same IDBKey instance for the lower
// and upper keys, which are equal. This representation is used in the (fairly
// common) case where a range is created out of a single key. In this case,
// upper_if_distinct_ is null, and upper_ points to the same IDBKey instance
// as lower_.
//
// The two representations are an implementation detail, and should not be
// visible to the class' consumers.
//
// It may be tempting to think that a nullptr upper_if_distinct_ implies a
// compressed representation. However, ranges without an upper key
// (open to infinity on the right side) have a null upper_if_distinct_, but
// are not considered compressed, as the left key is different from the right
// key.
// Owns the range's lower key, and possibly the upper key.
std::unique_ptr<IDBKey> lower_;
// Owns the range's upper key, if not null.
std::unique_ptr<IDBKey> upper_if_distinct_;
// Non-owning reference to the range's upper key.
//
// Points to either upper_if_distinct_ or lower_, or is null.
const raw_ptr<IDBKey> upper_;
const LowerBoundType lower_type_;
const UpperBoundType upper_type_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_INDEXEDDB_IDB_KEY_RANGE_H_
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