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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/range/range.h"
#include <limits>
#include "base/logging.h"
namespace ui {
Range::Range(const CHARRANGE& range, LONG total_length) {
// Check if this is an invalid range.
if (range.cpMin == -1 && range.cpMax == -1) {
*this = InvalidRange();
} else {
DCHECK_GE(range.cpMin, 0);
set_start(range.cpMin);
// {0,-1} is the "whole range" but that doesn't mean much out of context,
// so use the |total_length| parameter.
if (range.cpMax == -1) {
DCHECK_EQ(0, range.cpMin);
DCHECK_NE(-1, total_length);
set_end(total_length);
} else {
set_end(range.cpMax);
}
}
}
CHARRANGE Range::ToCHARRANGE() const {
CHARRANGE r = { -1, -1 };
if (!IsValid())
return r;
const LONG kLONGMax = std::numeric_limits<LONG>::max();
CHECK_LE(static_cast<LONG>(start()), kLONGMax);
CHECK_LE(static_cast<LONG>(end()), kLONGMax);
r.cpMin = static_cast<LONG>(start());
r.cpMax = static_cast<LONG>(end());
return r;
}
} // namespace gfx
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