private void HandleFixedAspectRatio(LayoutNode parentNode, LayoutNode child)
{
if (child.Size.IsFixedAspectRatio())
{
// Right now both sides of FixedAspectRatio think they're streched, we need to figure out which one is actually stretched based on how much room is thinks it has
var aspectRatioOfAvailableSpace = new AspectRatio(this.measurer.GetMeasuredSize(child.Size));
var childAspectRatio = child.Size.GetAspectRatio();
var isStretchedAlong = AspectRatio.IsStretchedAlong(childAspectRatio, aspectRatioOfAvailableSpace, parentNode.Orientation);
var isStretchedPerpendicular = AspectRatio.IsStretchedPerpendicular(childAspectRatio, aspectRatioOfAvailableSpace, parentNode.Orientation);
var isStretchedBoth = isStretchedAlong && isStretchedPerpendicular;
var oppositeOrientation = parentNode.Orientation.Opposite();
// If it's stretched both we do nothing because we already assume it's stretched on both sides
if (!isStretchedBoth)
{
if (isStretchedAlong)
{
var alongSize = this.measurer.MeasureEdgeOfNode(child, parentNode.Orientation);
this.measurer.Add(child.Size.GetValueFromOrientation(oppositeOrientation), (int)(alongSize * childAspectRatio.AlongOverPerpendicular(oppositeOrientation)));
}
if (isStretchedPerpendicular)
{
var perpendicularSize = this.measurer.MeasureEdgeOfNode(child, oppositeOrientation);
this.measurer.Add(child.Size.GetValueFromOrientation(parentNode.Orientation), (int)(perpendicularSize * childAspectRatio.AlongOverPerpendicular(parentNode.Orientation)));
}
}
}
}
public BakedLayoutNode[] GetDirectChildrenOfNode(LayoutNode node)
{
if (!this.rawToBakedLookup.ContainsKey(node))
{
throw new Exception($"No node matches {node}");
}
if (node.Name.IsNameless)
{
throw new Exception($"Found node {node} but its nameless so it can't have children");
}
var result = new List <BakedLayoutNode>();
foreach (var child in node.Children)
{
if (child.IsBakable)
{
result.Add(this.rawToBakedLookup[child]);
}
}
return(result.ToArray());
}
public void AddNodeToLayout(BakedLayout inProgressLayout, Point position, LayoutNode node, int nestingLevel)
{
if (node.IsBakable)
{
inProgressLayout.Add(node, new BakedLayoutNode(position, this.measurer.GetMeasuredSize(node.Size), nestingLevel));
}
}
private static int GetRemainingAlongSizeFromEasyNodes(LayoutNode parentNode, Point groupSize)
{
var isVertical = parentNode.Orientation == Orientation.Vertical;
var totalAlongSize = isVertical ? groupSize.Y : groupSize.X;
var alongMargin = isVertical ? parentNode.Margin.Y : parentNode.Margin.X;
var remainingAlongSize = totalAlongSize - alongMargin * 2;
var lastIndex = parentNode.Children.Length - 1;
var index = 0;
foreach (var child in parentNode.Children)
{
if (child.Size.IsMeasurableAlong(parentNode.Orientation))
{
remainingAlongSize -= child.Size.GetValueFromOrientation(parentNode.Orientation).ActualSize;
}
if (index != lastIndex)
{
remainingAlongSize -= parentNode.Padding;
}
index++;
}
return(remainingAlongSize);
}
private static RawFlowLayout OrientedFlowParent(Orientation orientation, string name, LayoutSize size, FlowLayoutStyle style, params LayoutNodeOrInstruction[] children)
{
var workableAreaStyle = new LayoutStyle(margin: style.Margin, alignment: style.Alignment);
var workableArea = LayoutNode.NamelessOneOffParent(size, workableAreaStyle, LayoutNode.Leaf("workableArea", LayoutSize.StretchedBoth())).Bake().GetNode("workableArea");
var rows = new FlowLayoutRows(workableArea.Size, style, orientation);
foreach (var item in children)
{
if (item.IsLayoutNode)
{
if (!rows.CanFitItemPerpendicular(item))
{
break;
}
if (rows.CanFitItemAlongCurrentRow(item))
{
rows.AddItemToCurrentRow(item);
}
else
{
rows.CreateNextRowAndAdd(item);
}
}
else if (item.IsInstruction)
{
rows.ConsumeInstruction(item);
}
}
return(new RawFlowLayout(name, size, workableAreaStyle, orientation, style, rows));
}
private void CreateActorsForChildren(LayoutNode parent, IBakedLayout layout)
{
if (!parent.HasChildren)
{
return;
}
var parentActor = GetActor(parent.Name.Text);
foreach (var childNode in parent.Children)
{
if (childNode.Name.Exists)
{
var actorName = childNode.Name.Text;
var actor = parentActor.transform.AddActorAsChild(actorName);
new LayoutSiblingWithCachedOrientation(actor, parent.Orientation);
new BoundingRect(actor, layout.GetNode(actorName).Size);
AddActorToTable(actorName, actor);
SetupChildActor(actor, actorName, layout);
CreateActorsForChildren(childNode, layout);
}
}
}
private void HandleStretchedNodes(LayoutNode parentNode, int remainingAlongSize, int perpendicularStretchSize)
{
int stretchAlongCount = 0;
int stretchPerpendicularCount = 0;
foreach (var child in parentNode.Children)
{
if (child.Size.IsStretchedAlong(parentNode.Orientation))
{
stretchAlongCount++;
}
if (child.Size.IsStretchedPerpendicular(parentNode.Orientation))
{
stretchPerpendicularCount++;
}
}
// Update size of along stretch elements
if (stretchAlongCount > 0)
{
var alongSizeOfEachStretchedChild = remainingAlongSize / stretchAlongCount;
var fractionalLossIncrement = (float)remainingAlongSize / stretchAlongCount % 1;
var fractionalLoss = 0f;
foreach (var child in parentNode.Children)
{
if (child.Size.IsStretchedAlong(parentNode.Orientation))
{
fractionalLoss += fractionalLossIncrement;
int extraPixelIfApplicable = 0;
var epsilon = 0.001f;
if (1 - fractionalLoss < epsilon)
{
extraPixelIfApplicable = 1;
fractionalLoss -= 1;
}
this.measurer.Add(child.Size.GetValueFromOrientation(parentNode.Orientation), alongSizeOfEachStretchedChild + extraPixelIfApplicable);
}
}
}
// Update perp elements (we can inline this in the first loop
if (stretchPerpendicularCount > 0)
{
foreach (var child in parentNode.Children)
{
if (child.Size.IsStretchedPerpendicular(parentNode.Orientation))
{
this.measurer.Add(child.Size.GetValueFromOrientation(parentNode.Orientation.Opposite()), perpendicularStretchSize);
HandleFixedAspectRatio(parentNode, child);
}
}
}
}
public void ConsumeInstruction(FlowLayoutInstruction instruction)
{
if (instruction == FlowLayoutInstruction.Linebreak)
{
if (HasRoomForAnotherRow(LayoutNode.NamelessLeaf(LayoutSize.Pixels(0, 0))))
{
AddNewRow();
}
}
}
public LayoutNode[] GetLayoutNodesOfEachRow()
{
var nodes = new LayoutNode[Content.Count];
for (int i = 0; i < Content.Count; i++)
{
nodes[i] = Content[i].GetLayoutNode($"row {i}");
}
return(nodes);
}
internal RawFlowLayout(string name, LayoutSize size, LayoutStyle workableAreaStyle, Orientation orientation, FlowLayoutStyle style, FlowLayoutRows rows) : base(
LayoutNode.OneOffParent(name, size, workableAreaStyle,
LayoutNode.OrientedParent(orientation.Opposite(), "rows", LayoutSize.Pixels(rows.UsedSize), new LayoutStyle(padding: style.PaddingBetweenRows),
rows.GetLayoutNodesOfEachRow()
)
))
{
this.orientation = orientation;
this.rowNodes = rows.GetLayoutNodesOfEachRow();
this.rowUsedSpace = rows.GetUsedSpaceOfEachRow();
}
public bool CanFitItemPerpendicular(LayoutNode item)
{
if (Style.OverflowRule.HasInfiniteRows)
{
return(true);
}
var usedPerpendicular = PerpendicularSizeOfAllRowsExceptCurrent;
var itemPerpendicular = item.Size.GetValueFromOrientation(Orientation.Opposite()).ActualSize;
return(AvailablePerpendicularSize >= usedPerpendicular + itemPerpendicular);
}
private bool HasRoomForAnotherRow(LayoutNode itemToAdd)
{
if (Style.OverflowRule.HasInfiniteRows)
{
return(true);
}
var possibleNewRow = new FlowLayoutRow(AvailableAlongSize, Style, Orientation);
possibleNewRow.AddItem(itemToAdd);
var totalSizeAfterAddingRow = UsedSize.OppositeAxisValue(Orientation.ToAxis()) + possibleNewRow.UsedPerpendicularSize;
return(totalSizeAfterAddingRow <= AvailablePerpendicularSize);
}
private void BakeGroup(BakedLayout inProgressLayout, LayoutNode parentNode, Point parentNodeLocation, int parentNestingLevel)
{
var isVertical = parentNode.Orientation == Orientation.Vertical;
var groupSize = this.measurer.GetMeasuredSize(parentNode.Size);
int remainingAlongSize = GetRemainingAlongSizeFromEasyNodes(parentNode, groupSize);
var perpendicularStretchSize = isVertical ? groupSize.X - parentNode.Margin.X * 2 : groupSize.Y - parentNode.Margin.Y * 2;
HandleStretchedNodes(parentNode, remainingAlongSize, perpendicularStretchSize);
// Place elements
PlaceAndBakeMeasuredElements(inProgressLayout, parentNode, parentNodeLocation, parentNestingLevel + 1);
}
public void CreateNextRowAndAdd(LayoutNode itemToAdd)
{
if (CurrentRow.Content.Count == 0)
{
AddItemToCurrentRow(itemToAdd);
}
else if (!HasRoomForAnotherRow(itemToAdd))
{
AddItemToCurrentRow(itemToAdd);
}
else
{
AddNewRow();
AddItemToCurrentRow(itemToAdd);
}
}
private Point CalculateTotalUsedSpace(LayoutNode parentNode)
{
var totalUsedAlongSpace = 0;
var totalUsedPerpendicularSpace = 0;
foreach (var child in parentNode.Children)
{
totalUsedAlongSpace += this.measurer.MeasureEdgeOfNode(child, parentNode.Orientation);
totalUsedAlongSpace += parentNode.Padding;
totalUsedPerpendicularSpace = Math.Max(totalUsedPerpendicularSpace, this.measurer.MeasureEdgeOfNode(child, parentNode.Orientation.Opposite()));
}
// subtract 1 padding since the previous loop adds an extra (thanks foreach)
totalUsedAlongSpace -= parentNode.Padding;
return(parentNode.Orientation.GetPointFromAlongPerpendicular(totalUsedAlongSpace, totalUsedPerpendicularSpace));
}
public void AddItemToCurrentRow(LayoutNode itemToAdd)
{
if (StopAddingNewItems)
{
return;
}
CurrentRow.AddItem(itemToAdd);
var overflowedAlong = CurrentRow.UsedAlongSize > AvailableAlongSize;
var overflowedPerpendicular = UsedSize.OppositeAxisValue(Orientation.ToAxis()) > AvailablePerpendicularSize;
var failed = overflowedPerpendicular || overflowedAlong;
if (failed)
{
}
}
private void PlaceAndBakeMeasuredElements(BakedLayout inProgressLayout, LayoutNode parentNode, Point parentNodeLocation, int currentNestingLevel)
{
var parentSize = this.measurer.GetMeasuredSize(parentNode.Size);
var nextPosition = parentNodeLocation
+ parentNode.Alignment.GetRelativePositionOfElement(parentSize, CalculateTotalUsedSpace(parentNode))
+ parentNode.Alignment.AddPostionDeltaFromMargin(parentNode.Margin)
;
foreach (var child in parentNode.Children)
{
var alignmentOffset = parentNode.Alignment.GetRelativePositionOfElement(CalculateTotalUsedSpace(parentNode), this.measurer.GetMeasuredSize(child.Size)).WithJustAxisValue(parentNode.Orientation.Opposite().ToAxis());
var childPosition = nextPosition + alignmentOffset;
AddNodeToLayout(inProgressLayout, childPosition, child, currentNestingLevel);
nextPosition += parentNode.Orientation.GetPointForAlongAxis(this.measurer.MeasureEdgeOfNode(child, parentNode.Orientation) + parentNode.Padding);
if (child.HasChildren)
{
BakeGroup(inProgressLayout, child, childPosition, currentNestingLevel);
}
}
}
public LayoutNode GetLayoutNode(string rowNodeName)
{
var size = Orientation.GetPointFromAlongPerpendicular(AvailableAlongSize, UsedPerpendicularSize);
return(LayoutNode.OrientedParent(Orientation, rowNodeName, LayoutSize.Pixels(size), RowStyle, Content.ToArray()));
}
public void AddItem(LayoutNode child)
{
Content.Add(child);
UpdateEstimatedSize();
}
public BakedLayoutNode GetNode(LayoutNode unbakedNode)
{
return(this.rawToBakedLookup[unbakedNode]);
}
public void Add(LayoutNode key, BakedLayoutNode value)
{
this.rawToBakedLookup[key] = value;
}
public bool CanFitItemAlongCurrentRow(LayoutNode item)
{
return(RemainingAlongSizeInCurrentRow >= item.Size.GetValueFromOrientation(Orientation).ActualSize);
}
public static RawLayout HorizontalFlexParent(string name, FlexLayoutStyle style, params LayoutNode[] children)
{
return(LayoutNode.HorizontalParent(name, FlexParentSize(Orientation.Horizontal, style, children), style.InnerStyle, children));
}
public LayoutBaker(LayoutNode rootNode)
{
this.rootNode = rootNode;
this.measurer = new LayoutMeasurer();
}
public LayoutNodeOrInstruction(LayoutNode layoutNode)
{
InternalLayoutNode = layoutNode;
}
public static RawLayout OneOffParent(string name, LayoutSize size, LayoutStyle style, LayoutNode child)
{
// Horizontal/Vertical does not matter here
return(HorizontalParent(name, size, style, child));
}
public static RawLayout NamelessOneOffParent(LayoutSize size, LayoutStyle style, LayoutNode child)
{
// Horizontal/Vertical does not matter here
return(HorizontalParent("root", size, style, child));
}
public BakedLayout(LayoutNode originalRoot)
{
OriginalRoot = originalRoot;
}
public RawLayout(LayoutNode rootNode) : base(rootNode)
{
}
public int MeasureEdgeOfNode(LayoutNode node, Orientation orientation)
{
return(MeasureEdge(node.Size.GetValueFromOrientation(orientation)));
}
