| /* |
| * Copyright (C) 2012 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 GridPosition_h |
| #define GridPosition_h |
| |
| #include "wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| enum GridPositionType { |
| AutoPosition, |
| ExplicitPosition, // [ <integer> || <string> ] |
| SpanPosition, // span && [ <integer> || <string> ] |
| NamedGridAreaPosition // <ident> |
| }; |
| |
| class GridPosition { |
| public: |
| GridPosition() |
| : m_type(AutoPosition) |
| , m_integerPosition(0) |
| { |
| } |
| |
| bool isPositive() const { return integerPosition() > 0; } |
| |
| GridPositionType type() const { return m_type; } |
| bool isAuto() const { return m_type == AutoPosition; } |
| bool isSpan() const { return m_type == SpanPosition; } |
| bool isNamedGridArea() const { return m_type == NamedGridAreaPosition; } |
| |
| void setExplicitPosition(int position, const String& namedGridLine) |
| { |
| m_type = ExplicitPosition; |
| m_integerPosition = position; |
| m_namedGridLine = namedGridLine; |
| } |
| |
| void setAutoPosition() |
| { |
| m_type = AutoPosition; |
| m_integerPosition = 0; |
| } |
| |
| // 'span' values cannot be negative, yet we reuse the <integer> position which can |
| // be. This means that we have to convert the span position to an integer, losing |
| // some precision here. It shouldn't be an issue in practice though. |
| void setSpanPosition(int position, const String& namedGridLine) |
| { |
| m_type = SpanPosition; |
| m_integerPosition = position; |
| m_namedGridLine = namedGridLine; |
| } |
| |
| void setNamedGridArea(const String& namedGridArea) |
| { |
| m_type = NamedGridAreaPosition; |
| m_namedGridLine = namedGridArea; |
| } |
| |
| int integerPosition() const |
| { |
| ASSERT(type() == ExplicitPosition); |
| return m_integerPosition; |
| } |
| |
| String namedGridLine() const |
| { |
| ASSERT(type() == ExplicitPosition || type() == SpanPosition || type() == NamedGridAreaPosition); |
| return m_namedGridLine; |
| } |
| |
| int spanPosition() const |
| { |
| ASSERT(type() == SpanPosition); |
| return m_integerPosition; |
| } |
| |
| bool operator==(const GridPosition& other) const |
| { |
| return m_type == other.m_type && m_integerPosition == other.m_integerPosition && m_namedGridLine == other.m_namedGridLine; |
| } |
| |
| bool shouldBeResolvedAgainstOppositePosition() const |
| { |
| return isAuto() || isSpan(); |
| } |
| private: |
| GridPositionType m_type; |
| int m_integerPosition; |
| String m_namedGridLine; |
| }; |
| |
| } // namespace blink |
| |
| #endif // GridPosition_h |