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/base/range/range.h" 6 7 #include <limits> 8 9 #include "base/logging.h" 10 11 namespace ui { 12 13 Range::Range(const NSRange& range) { 14 *this = range; 15 } 16 17 Range& Range::operator=(const NSRange& range) { 18 if (range.location == NSNotFound) { 19 DCHECK_EQ(0U, range.length); 20 *this = InvalidRange(); 21 } else { 22 set_start(range.location); 23 // Don't overflow |end_|. 24 DCHECK_LE(range.length, std::numeric_limits<size_t>::max() - start()); 25 set_end(start() + range.length); 26 } 27 return *this; 28 } 29 30 NSRange Range::ToNSRange() const { 31 if (!IsValid()) 32 return NSMakeRange(NSNotFound, 0); 33 return NSMakeRange(GetMin(), length()); 34 } 35 36 } // namespace gfx 37
