241 lines
6.3 KiB
C++
241 lines
6.3 KiB
C++
/*
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* Copyright (C) 2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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#include "LayoutUnit.h"
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#include "LayoutPoint.h"
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#include "LayoutRect.h"
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#include "MarginTypes.h"
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#include <wtf/HashFunctions.h>
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#include <wtf/HashTraits.h>
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namespace WebCore {
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#define USE_FLOAT_AS_INLINE_LAYOUT_UNIT 1
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#if USE_FLOAT_AS_INLINE_LAYOUT_UNIT
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using InlineLayoutUnit = float;
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using InlineLayoutPoint = FloatPoint;
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using InlineLayoutSize = FloatSize;
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using InlineLayoutRect = FloatRect;
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#else
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using InlineLayoutUnit = LayoutUnit;
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using InlineLayoutPoint = LayoutPoint;
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using InlineLayoutSize = LayoutSize;
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using InlineLayoutRect = LayoutRect;
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#endif
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namespace Layout {
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struct Position {
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operator LayoutUnit() const { return value; }
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LayoutUnit value;
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};
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inline bool operator<(const Position& a, const Position& b)
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{
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return a.value < b.value;
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}
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inline bool operator==(const Position& a, const Position& b)
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{
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return a.value == b.value;
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}
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struct Point {
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// FIXME: Use Position<Horizontal>, Position<Vertical> to avoid top/left vs. x/y confusion.
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LayoutUnit x; // left
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LayoutUnit y; // top
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Point() = default;
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Point(LayoutUnit, LayoutUnit);
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Point(LayoutPoint);
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static Point max() { return { LayoutUnit::max(), LayoutUnit::max() }; }
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void move(LayoutSize);
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void moveBy(LayoutPoint);
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operator LayoutPoint() const { return { x, y }; }
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};
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// FIXME: Wrap these into structs.
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using PointInContextRoot = Point;
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using PositionInContextRoot = Position;
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inline Point::Point(LayoutPoint point)
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: x(point.x())
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, y(point.y())
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{
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}
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inline Point::Point(LayoutUnit x, LayoutUnit y)
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: x(x)
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, y(y)
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{
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}
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inline void Point::move(LayoutSize offset)
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{
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x += offset.width();
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y += offset.height();
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}
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inline void Point::moveBy(LayoutPoint offset)
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{
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x += offset.x();
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y += offset.y();
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}
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// Margin, border, padding
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struct HorizontalEdges {
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LayoutUnit left;
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LayoutUnit right;
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};
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struct VerticalEdges {
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LayoutUnit top;
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LayoutUnit bottom;
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};
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struct Edges {
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HorizontalEdges horizontal;
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VerticalEdges vertical;
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LayoutUnit width() const { return horizontal.left + horizontal.right; }
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LayoutUnit height() const { return vertical.top + vertical.bottom; }
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};
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inline Edges operator/(const Edges& edge, size_t value)
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{
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return { { edge.horizontal.left / value, edge.horizontal.right / value }, { edge.vertical.top / value, edge.vertical.bottom / value } };
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}
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struct ContentWidthAndMargin {
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LayoutUnit contentWidth;
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UsedHorizontalMargin usedMargin;
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};
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struct ContentHeightAndMargin {
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LayoutUnit contentHeight;
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UsedVerticalMargin::NonCollapsedValues nonCollapsedMargin;
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};
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struct HorizontalGeometry {
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LayoutUnit left;
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LayoutUnit right;
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ContentWidthAndMargin contentWidthAndMargin;
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};
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struct VerticalGeometry {
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LayoutUnit top;
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LayoutUnit bottom;
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ContentHeightAndMargin contentHeightAndMargin;
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};
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struct OverriddenHorizontalValues {
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std::optional<LayoutUnit> width;
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std::optional<UsedHorizontalMargin> margin;
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};
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struct OverriddenVerticalValues {
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// Consider collapsing it.
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std::optional<LayoutUnit> height;
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};
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inline LayoutUnit toLayoutUnit(InlineLayoutUnit value)
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{
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return LayoutUnit { value };
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}
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inline LayoutUnit ceiledLayoutUnit(InlineLayoutUnit value)
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{
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return LayoutUnit::fromFloatCeil(value);
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}
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inline LayoutPoint toLayoutPoint(const InlineLayoutPoint& point)
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{
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return LayoutPoint { point };
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}
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inline LayoutRect toLayoutRect(const InlineLayoutRect& rect)
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{
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return LayoutRect { rect };
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}
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inline InlineLayoutUnit maxInlineLayoutUnit()
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{
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#if USE_FLOAT_AS_INLINE_LAYOUT_UNIT
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return std::numeric_limits<float>::max();
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#else
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return LayoutUnit::max();
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#endif
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}
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struct SlotPosition {
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SlotPosition() = default;
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SlotPosition(size_t column, size_t row);
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size_t column { 0 };
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size_t row { 0 };
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};
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inline SlotPosition::SlotPosition(size_t column, size_t row)
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: column(column)
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, row(row)
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{
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}
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inline bool operator==(const SlotPosition& a, const SlotPosition& b)
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{
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return a.column == b.column && a.row == b.row;
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}
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struct CellSpan {
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size_t column { 1 };
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size_t row { 1 };
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};
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}
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}
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namespace WTF {
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struct SlotPositionHash {
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static unsigned hash(const WebCore::Layout::SlotPosition& slotPosition) { return pairIntHash(slotPosition.column, slotPosition.row); }
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static bool equal(const WebCore::Layout::SlotPosition& a, const WebCore::Layout::SlotPosition& b) { return a == b; }
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static const bool safeToCompareToEmptyOrDeleted = true;
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};
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template<> struct HashTraits<WebCore::Layout::SlotPosition> : GenericHashTraits<WebCore::Layout::SlotPosition> {
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static WebCore::Layout::SlotPosition emptyValue() { return WebCore::Layout::SlotPosition(0, std::numeric_limits<size_t>::max()); }
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static void constructDeletedValue(WebCore::Layout::SlotPosition& slot) { slot.column = std::numeric_limits<size_t>::max(); }
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static bool isDeletedValue(const WebCore::Layout::SlotPosition& slot) { return slot.column == std::numeric_limits<size_t>::max(); }
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};
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template<> struct DefaultHash<WebCore::Layout::SlotPosition> : SlotPositionHash { };
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}
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#endif
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