| /* |
| * Copyright (C) 2018 Apple 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include <wtf/Optional.h> |
| |
| namespace WebCore { |
| namespace Layout { |
| |
| struct ComputedVerticalMargin { |
| Optional<LayoutUnit> before; |
| Optional<LayoutUnit> after; |
| }; |
| |
| struct UsedVerticalMargin { |
| LayoutUnit before() const { return m_collapsedValues.before.valueOr(m_nonCollapsedValues.before); } |
| LayoutUnit after() const { return m_collapsedValues.after.valueOr(m_nonCollapsedValues.after); } |
| bool isCollapsedThrough() const { return m_collapsedValues.isCollapsedThrough; } |
| |
| struct NonCollapsedValues { |
| LayoutUnit before; |
| LayoutUnit after; |
| }; |
| NonCollapsedValues nonCollapsedValues() const { return m_nonCollapsedValues; } |
| |
| struct CollapsedValues { |
| Optional<LayoutUnit> before; |
| Optional<LayoutUnit> after; |
| bool isCollapsedThrough { false }; |
| }; |
| CollapsedValues collapsedValues() const { return m_collapsedValues; } |
| bool hasCollapsedValues() const { return m_collapsedValues.before || m_collapsedValues.after; } |
| void setCollapsedValues(CollapsedValues collapsedValues) { m_collapsedValues = collapsedValues; } |
| |
| UsedVerticalMargin(NonCollapsedValues, CollapsedValues); |
| UsedVerticalMargin() = default; |
| |
| private: |
| NonCollapsedValues m_nonCollapsedValues; |
| CollapsedValues m_collapsedValues; |
| }; |
| |
| struct ComputedHorizontalMargin { |
| Optional<LayoutUnit> start; |
| Optional<LayoutUnit> end; |
| }; |
| |
| struct UsedHorizontalMargin { |
| LayoutUnit start; |
| LayoutUnit end; |
| }; |
| |
| struct EstimatedMarginBefore { |
| LayoutUnit usedValue() const { return collapsedValue.valueOr(nonCollapsedValue); } |
| LayoutUnit nonCollapsedValue; |
| Optional<LayoutUnit> collapsedValue; |
| bool isCollapsedThrough { false }; |
| }; |
| |
| struct PositiveAndNegativeVerticalMargin { |
| struct Values { |
| bool isNonZero() const { return positive.valueOr(0) || negative.valueOr(0); } |
| |
| Optional<LayoutUnit> positive; |
| Optional<LayoutUnit> negative; |
| bool isQuirk { false }; |
| }; |
| Values before; |
| Values after; |
| }; |
| |
| inline UsedVerticalMargin::UsedVerticalMargin(UsedVerticalMargin::NonCollapsedValues nonCollapsedValues, UsedVerticalMargin::CollapsedValues collapsedValues) |
| : m_nonCollapsedValues(nonCollapsedValues) |
| , m_collapsedValues(collapsedValues) |
| { |
| } |
| |
| } |
| } |
| #endif |