| /* |
| * Copyright (C) 2013 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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 GridLength_h |
| #define GridLength_h |
| |
| #include "platform/Length.h" |
| #include "platform/wtf/Allocator.h" |
| |
| namespace blink { |
| |
| // This class wraps the <track-breadth> which can be either a <percentage>, |
| // <length>, min-content, max-content or <flex>. This class avoids spreading the |
| // knowledge of <flex> throughout the layout directory by adding an new unit to |
| // Length.h. |
| class GridLength { |
| DISALLOW_NEW(); |
| |
| public: |
| GridLength(const Length& length) |
| : length_(length), flex_(0), type_(kLengthType) {} |
| |
| explicit GridLength(double flex) : flex_(flex), type_(kFlexType) {} |
| |
| bool IsLength() const { return type_ == kLengthType; } |
| bool IsFlex() const { return type_ == kFlexType; } |
| |
| const Length& length() const { |
| DCHECK(IsLength()); |
| return length_; |
| } |
| |
| double Flex() const { |
| DCHECK(IsFlex()); |
| return flex_; |
| } |
| |
| bool HasPercentage() const { |
| return type_ == kLengthType && length_.IsPercentOrCalc(); |
| } |
| |
| bool operator==(const GridLength& o) const { |
| return length_ == o.length_ && flex_ == o.flex_ && type_ == o.type_; |
| } |
| |
| bool IsContentSized() const { |
| return type_ == kLengthType && |
| (length_.IsAuto() || length_.IsMinContent() || |
| length_.IsMaxContent()); |
| } |
| |
| bool IsAuto() const { return type_ == kLengthType && length_.IsAuto(); } |
| |
| private: |
| // Ideally we would put the 2 following fields in a union, but Length has a |
| // constructor, a destructor and a copy assignment which isn't allowed. |
| Length length_; |
| double flex_; |
| enum GridLengthType { kLengthType, kFlexType }; |
| GridLengthType type_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // GridLength_h |