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415 行
15 KiB

using System;
using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.gestures;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.rendering {
public class RelativeRect : IEquatable<RelativeRect> {
RelativeRect(double left, double top, double right, double bottom) {
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
}
public readonly double left;
public readonly double top;
public readonly double right;
public readonly double bottom;
public static RelativeRect fromLTRB(double left, double top, double right, double bottom) {
return new RelativeRect(left, top, right, bottom);
}
public static RelativeRect fromSize(Rect rect, Size container) {
return new RelativeRect(
rect.left,
rect.top,
container.width - rect.right,
container.height - rect.bottom);
}
public static RelativeRect fromRect(Rect rect, Rect container) {
return fromLTRB(
rect.left - container.left,
rect.top - container.top,
container.right - rect.right,
container.bottom - rect.bottom
);
}
public static readonly RelativeRect fill = fromLTRB(0.0, 0.0, 0.0, 0.0);
public bool hasInsets {
get { return this.left > 0.0 || this.top > 0.0 || this.right > 0.0 || this.bottom > 0.0; }
}
public RelativeRect shift(Offset offset) {
return fromLTRB(
this.left + offset.dx,
this.top + offset.dy,
this.right - offset.dx,
this.bottom - offset.dy);
}
public RelativeRect inflate(double delta) {
return fromLTRB(
this.left - delta,
this.top - delta,
this.right - delta,
this.bottom - delta);
}
public RelativeRect deflate(double delta) {
return this.inflate(-delta);
}
public RelativeRect intersect(RelativeRect other) {
return fromLTRB(
Math.Max(this.left, other.left),
Math.Max(this.top, other.top),
Math.Max(this.right, other.right),
Math.Max(this.bottom, other.bottom)
);
}
public Rect toRect(Rect container) {
return Rect.fromLTRB(
this.left + container.left,
this.top + container.top,
container.right - this.right,
container.bottom - this.bottom);
}
public Rect toSize(Size container) {
return Rect.fromLTRB(
this.left,
this.top,
container.width - this.right,
container.height - this.bottom);
}
public bool Equals(RelativeRect other) {
if (ReferenceEquals(null, other)) {
return false;
}
if (ReferenceEquals(this, other)) {
return true;
}
return this.left.Equals(other.left)
&& this.top.Equals(other.top)
&& this.right.Equals(other.right)
&& this.bottom.Equals(other.bottom);
}
public override bool Equals(object obj) {
if (ReferenceEquals(null, obj)) {
return false;
}
if (ReferenceEquals(this, obj)) {
return true;
}
if (obj.GetType() != this.GetType()) {
return false;
}
return this.Equals((RelativeRect) obj);
}
public override int GetHashCode() {
unchecked {
var hashCode = this.left.GetHashCode();
hashCode = (hashCode * 397) ^ this.top.GetHashCode();
hashCode = (hashCode * 397) ^ this.right.GetHashCode();
hashCode = (hashCode * 397) ^ this.bottom.GetHashCode();
return hashCode;
}
}
public static bool operator ==(RelativeRect a, RelativeRect b) {
return Equals(a, b);
}
public static bool operator !=(RelativeRect a, RelativeRect b) {
return !(a == b);
}
}
public class StackParentData : ContainerParentDataMixinBoxParentData<RenderBox> {
public double? top;
public double? right;
public double? bottom;
public double? left;
public double? width;
public double? height;
public bool isPositioned {
get {
return this.top != null || this.right != null || this.bottom != null || this.left != null ||
this.width != null || this.height != null;
}
}
RelativeRect rect {
get {
return RelativeRect.fromLTRB(this.left ?? 0.0, this.top ?? 0.0, this.right ?? 0.0, this.bottom ?? 0.0);
}
set {
this.top = value.top;
this.right = value.right;
this.bottom = value.bottom;
this.left = value.left;
}
}
}
public enum StackFit {
loose,
expand,
passthrough,
}
public enum Overflow {
visible,
clip,
}
public class RenderStack : RenderBoxContainerDefaultsMixinContainerRenderObjectMixinRenderBox<RenderBox,
StackParentData> {
public RenderStack(
StackFit? fit,
Overflow? overflow,
List<RenderBox> children = null,
Alignment alignment = null) {
this._alignment = alignment ?? Alignment.topLeft;
this._fit = fit ?? StackFit.loose;
this._overflow = overflow ?? Overflow.clip;
this.addAll(children);
}
bool _hasVisualOverflow = false;
public override void setupParentData(RenderObject child) {
if (!(child.parentData is StackParentData)) {
child.parentData = new StackParentData();
}
}
Alignment _alignment;
public Alignment alignment {
get { return this._alignment; }
set {
if (this._alignment == value) {
return;
}
this._alignment = value;
this.markNeedsLayout();
}
}
StackFit _fit;
public StackFit fit {
get { return this._fit; }
set {
if (this._fit == value) {
return;
}
this._fit = value;
this.markNeedsLayout();
}
}
Overflow _overflow;
public Overflow overflow {
get { return this._overflow; }
set {
if (this._overflow == value) {
return;
}
this._overflow = value;
this.markNeedsPaint();
}
}
public delegate double mainChildSizeGetter(RenderBox child);
double _getIntrinsicDimension(mainChildSizeGetter getter) {
double extent = 0.0;
RenderBox child = this.firstChild;
while (child != null) {
StackParentData childParentData = (StackParentData) child.parentData;
if (!childParentData.isPositioned) {
extent = Math.Max(extent, getter(child));
}
D.assert(child.parentData == childParentData);
if (childParentData != null) {
child = childParentData.nextSibling;
}
}
return extent;
}
protected override double computeMinIntrinsicWidth(double height) {
return this._getIntrinsicDimension((RenderBox child) => child.getMinIntrinsicWidth(height));
}
protected override double computeMaxIntrinsicWidth(double height) {
return this._getIntrinsicDimension((RenderBox child) => child.getMaxIntrinsicWidth(height));
}
protected override double computeMinIntrinsicHeight(double width) {
return this._getIntrinsicDimension((RenderBox child) => child.getMinIntrinsicHeight(width));
}
protected override double computeMaxIntrinsicHeight(double width) {
return this._getIntrinsicDimension((RenderBox child) => child.getMaxIntrinsicHeight(width));
}
protected override double? computeDistanceToActualBaseline(TextBaseline baseline) {
return this.defaultComputeDistanceToHighestActualBaseline(baseline);
}
protected override void performLayout() {
this._hasVisualOverflow = false;
bool hasNonPositionedChildren = false;
if (this.childCount == 0) {
this.size = this.constraints.biggest;
return;
}
double width = this.constraints.minWidth;
double height = this.constraints.minHeight;
BoxConstraints nonPositionedConstraints = null;
switch (this.fit) {
case StackFit.loose:
nonPositionedConstraints = this.constraints.loosen();
break;
case StackFit.expand:
nonPositionedConstraints = BoxConstraints.tight(this.constraints.biggest);
break;
case StackFit.passthrough:
nonPositionedConstraints = this.constraints;
break;
}
RenderBox child = this.firstChild;
while (child != null) {
StackParentData childParentData = (StackParentData) child.parentData;
if (!childParentData.isPositioned) {
hasNonPositionedChildren = true;
child.layout(nonPositionedConstraints, parentUsesSize: true);
Size childSize = child.size;
width = Math.Max(width, childSize.width);
height = Math.Max(height, childSize.height);
}
child = childParentData.nextSibling;
}
if (hasNonPositionedChildren) {
this.size = new Size(width, height);
D.assert(this.size.width == this.constraints.constrainWidth(width));
D.assert(this.size.height == this.constraints.constrainHeight(height));
} else {
this.size = this.constraints.biggest;
}
child = this.firstChild;
while (child != null) {
StackParentData childParentData = (StackParentData) child.parentData;
if (!childParentData.isPositioned) {
childParentData.offset = this._alignment.alongOffset(this.size - child.size);
} else {
BoxConstraints childConstraints = new BoxConstraints();
if (childParentData.left != null && childParentData.right != null) {
childConstraints =
childConstraints.tighten(
width: this.size.width - childParentData.right - childParentData.left);
} else if (childParentData.width != null) {
childConstraints = childConstraints.tighten(width: childParentData.width);
}
if (childParentData.top != null && childParentData.bottom != null) {
childConstraints =
childConstraints.tighten(
height: this.size.height - childParentData.bottom - childParentData.top);
} else if (childParentData.height != null) {
childConstraints = childConstraints.tighten(height: childParentData.height);
}
child.layout(childConstraints, parentUsesSize: true);
double x;
if (childParentData.left != null) {
x = childParentData.left.Value;
} else if (childParentData.right != null) {
x = this.size.width - childParentData.right.Value - child.size.width;
} else {
x = this._alignment.alongOffset(this.size - child.size).dx;
}
if (x < 0.0 || x + child.size.width > this.size.width) {
this._hasVisualOverflow = true;
}
double y;
if (childParentData.top != null) {
y = childParentData.top.Value;
} else if (childParentData.bottom != null) {
y = this.size.height - childParentData.bottom.Value - child.size.height;
} else {
y = this._alignment.alongOffset(this.size - child.size).dy;
}
if (y < 0.0 || y + child.size.height > this.size.height) {
this._hasVisualOverflow = true;
}
childParentData.offset = new Offset(x, y);
}
D.assert(child.parentData == childParentData);
child = childParentData.nextSibling;
}
}
protected override bool hitTestChildren(HitTestResult result, Offset position = null) {
return this.defaultHitTestChildren(result, position: position);
}
public void paintStack(PaintingContext context, Offset offset) {
this.defaultPaint(context, offset);
}
public override void paint(PaintingContext context, Offset offset) {
if (this._overflow == Overflow.clip && this._hasVisualOverflow) {
context.pushClipRect(this.needsCompositing, offset, Offset.zero & this.size, this.paintStack);
} else {
this.paintStack(context, offset);
}
}
public override Rect describeApproximatePaintClip(RenderObject childRaw) {
return this._hasVisualOverflow ? Offset.zero & this.size : null;
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<Alignment>("alignment", this.alignment));
properties.add(new EnumProperty<StackFit>("fit", this.fit));
properties.add(new EnumProperty<Overflow>("overflow", this.overflow));
}
}
}