ui/gfx/range/range_win.cc

   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
  11 namespace gfx {
  12
  13 Range::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
  32 CHARRANGE 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