1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/gfx/range/range.h"
6
7#include <limits>
8
9#include "base/logging.h"
10
11namespace gfx {
12
13Range::Range(const CHARRANGE& range, LONG total_length) {
14  // Check if this is an invalid range.
15  if (range.cpMin == -1 && range.cpMax == -1) {
16    *this = InvalidRange();
17  } else {
18    DCHECK_GE(range.cpMin, 0);
19    set_start(range.cpMin);
20    // {0,-1} is the "whole range" but that doesn't mean much out of context,
21    // so use the |total_length| parameter.
22    if (range.cpMax == -1) {
23      DCHECK_EQ(0, range.cpMin);
24      DCHECK_NE(-1, total_length);
25      set_end(total_length);
26    } else {
27      set_end(range.cpMax);
28    }
29  }
30}
31
32CHARRANGE Range::ToCHARRANGE() const {
33  CHARRANGE r = { -1, -1 };
34  if (!IsValid())
35    return r;
36
37  const LONG kLONGMax = std::numeric_limits<LONG>::max();
38  CHECK_LE(static_cast<LONG>(start()), kLONGMax);
39  CHECK_LE(static_cast<LONG>(end()), kLONGMax);
40  r.cpMin = static_cast<LONG>(start());
41  r.cpMax = static_cast<LONG>(end());
42  return r;
43}
44
45}  // namespace gfx
46