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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 INC. 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 INC. 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_PLATFORM_WTF_TEXT_TEXT_POSITION_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_POSITION_H_
#include <memory>
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "third_party/blink/renderer/platform/wtf/wtf_export.h"
#include "third_party/blink/renderer/platform/wtf/wtf_size_t.h"
namespace WTF {
// An abstract number of element in a sequence. The sequence has a first
// element. This type should be used instead of integer because 2
// contradicting traditions can call a first element '0' or '1' which makes
// integer type ambiguous.
class OrdinalNumber final {
DISALLOW_NEW();
public:
static OrdinalNumber FromZeroBasedInt(int zero_based_int) {
return OrdinalNumber(zero_based_int);
}
static OrdinalNumber FromOneBasedInt(int one_based_int) {
return OrdinalNumber(one_based_int - 1);
}
// Use First() instead.
OrdinalNumber() = delete;
int ZeroBasedInt() const { return zero_based_value_; }
int OneBasedInt() const { return zero_based_value_ + 1; }
bool operator==(OrdinalNumber other) const {
return zero_based_value_ == other.zero_based_value_;
}
bool operator!=(OrdinalNumber other) const { return !((*this) == other); }
static OrdinalNumber First() { return OrdinalNumber(0); }
static OrdinalNumber BeforeFirst() { return OrdinalNumber(-1); }
private:
OrdinalNumber(int zero_based_int) : zero_based_value_(zero_based_int) {}
int zero_based_value_;
};
// TextPosition structure specifies coordinates within an text resource. It is
// used mostly
// for saving script source position.
class TextPosition final {
DISALLOW_NEW();
public:
TextPosition(OrdinalNumber line, OrdinalNumber column)
: line_(line), column_(column) {}
// Use MinimumPosition() instead.
TextPosition() = delete;
bool operator==(const TextPosition& other) const {
return line_ == other.line_ && column_ == other.column_;
}
bool operator!=(const TextPosition& other) const {
return !((*this) == other);
}
WTF_EXPORT OrdinalNumber ToOffset(const Vector<unsigned>&);
// A 'minimum' value of position, used as a default value.
static TextPosition MinimumPosition() {
return TextPosition(OrdinalNumber::First(), OrdinalNumber::First());
}
// A value with line value less than a minimum; used as an impossible
// position.
static TextPosition BelowRangePosition() {
return TextPosition(OrdinalNumber::BeforeFirst(),
OrdinalNumber::BeforeFirst());
}
// A value corresponding to a position with given offset within text having
// the specified line ending offsets.
WTF_EXPORT static TextPosition FromOffsetAndLineEndings(
unsigned,
const Vector<unsigned>&);
OrdinalNumber line_;
OrdinalNumber column_;
};
WTF_EXPORT std::unique_ptr<Vector<wtf_size_t>> GetLineEndings(const String&);
} // namespace WTF
using WTF::OrdinalNumber;
using WTF::TextPosition;
using WTF::GetLineEndings;
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_POSITION_H_
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