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1154 行
41 KiB
1154 行
41 KiB
using System.Collections.Generic;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.gestures;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.ui;
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using UnityEngine;
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using Canvas = Unity.UIWidgets.ui.Canvas;
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using Rect = Unity.UIWidgets.ui.Rect;
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namespace Unity.UIWidgets.rendering {
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public enum TableCellVerticalAlignment {
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top,
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middle,
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bottom,
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baseline,
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fill
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}
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public class TableCellParentData : BoxParentData {
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public TableCellVerticalAlignment? verticalAlignment;
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public int x;
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public int y;
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public override string ToString() {
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return
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base.ToString() + "; " + (verticalAlignment == null
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? "default vertical alignment"
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: verticalAlignment.ToString());
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}
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}
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public abstract class TableColumnWidth {
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protected TableColumnWidth() {
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}
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public abstract float minIntrinsicWidth(List<RenderBox> cells, float containerWidth);
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public abstract float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth);
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public virtual float? flex(List<RenderBox> cells) {
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return null;
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}
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public override string ToString() {
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return GetType().ToString();
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}
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}
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public class IntrinsicColumnWidth : TableColumnWidth {
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public IntrinsicColumnWidth(
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float? flex = null) {
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_flex = flex;
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}
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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float result = 0.0f;
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foreach (RenderBox cell in cells) {
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result = Mathf.Max(result, cell.getMinIntrinsicWidth(float.PositiveInfinity));
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}
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return result;
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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float result = 0.0f;
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foreach (RenderBox cell in cells) {
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result = Mathf.Max(result, cell.getMaxIntrinsicWidth(float.PositiveInfinity));
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}
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return result;
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}
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public override float? flex(List<RenderBox> cells) {
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return _flex;
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}
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readonly float? _flex;
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public override string ToString() {
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return $"${GetType()}(flex: {_flex})";
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}
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}
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public class FixedColumnWidth : TableColumnWidth {
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public FixedColumnWidth(float? value = null) {
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D.assert(value != null);
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this.value = value.Value;
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}
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public readonly float value;
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return value;
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return value;
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}
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public override string ToString() {
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return $"{GetType()}({value})";
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}
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}
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public class FractionColumnWidth : TableColumnWidth {
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public FractionColumnWidth(float? value = null) {
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D.assert(value != null);
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this.value = value.Value;
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}
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public readonly float value;
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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if (!containerWidth.isFinite()) {
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return 0.0f;
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}
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return value * containerWidth;
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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if (!containerWidth.isFinite()) {
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return 0.0f;
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}
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return value * containerWidth;
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}
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public override string ToString() {
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return $"{GetType()}({value})";
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}
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}
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public class FlexColumnWidth : TableColumnWidth {
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public FlexColumnWidth(float value = 1.0f) {
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this.value = value;
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}
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public readonly float value;
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return 0.0f;
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return 0.0f;
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}
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public override float? flex(List<RenderBox> cells) {
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return value;
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}
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public override string ToString() {
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return $"{GetType()}({value})";
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}
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}
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public class MaxColumnWidth : TableColumnWidth {
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public MaxColumnWidth(
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TableColumnWidth a, TableColumnWidth b) {
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this.a = a;
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this.b = b;
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}
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public readonly TableColumnWidth a;
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public readonly TableColumnWidth b;
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return Mathf.Max(
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a.minIntrinsicWidth(cells, containerWidth),
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b.minIntrinsicWidth(cells, containerWidth)
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);
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return Mathf.Max(
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a.maxIntrinsicWidth(cells, containerWidth),
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b.maxIntrinsicWidth(cells, containerWidth)
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);
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}
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public override float? flex(List<RenderBox> cells) {
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float? aFlex = a.flex(cells);
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if (aFlex == null) {
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return b.flex(cells);
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}
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float? bFlex = b.flex(cells);
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if (bFlex == null) {
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return null;
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}
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return Mathf.Max(aFlex.Value, bFlex.Value);
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}
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public override string ToString() {
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return $"{GetType()}({a}, {b})";
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}
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}
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public class MinColumnWidth : TableColumnWidth {
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public MinColumnWidth(
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TableColumnWidth a, TableColumnWidth b) {
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this.a = a;
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this.b = b;
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}
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public readonly TableColumnWidth a;
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public readonly TableColumnWidth b;
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public override float minIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return Mathf.Min(
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a.minIntrinsicWidth(cells, containerWidth),
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b.minIntrinsicWidth(cells, containerWidth)
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);
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}
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public override float maxIntrinsicWidth(List<RenderBox> cells, float containerWidth) {
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return Mathf.Min(
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a.maxIntrinsicWidth(cells, containerWidth),
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b.maxIntrinsicWidth(cells, containerWidth)
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);
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}
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public override float? flex(List<RenderBox> cells) {
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float? aFlex = a.flex(cells);
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if (aFlex == null) {
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return b.flex(cells);
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}
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float? bFlex = b.flex(cells);
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if (bFlex == null) {
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return null;
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}
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return Mathf.Min(aFlex.Value, bFlex.Value);
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}
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public override string ToString() {
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return $"{GetType()}({a}, {b})";
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}
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}
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public class RenderTable : RenderBox {
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public RenderTable(
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int? columns = null,
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int? rows = null,
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Dictionary<int, TableColumnWidth> columnWidths = null,
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TableColumnWidth defaultColumnWidth = null,
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TableBorder border = null,
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List<Decoration> rowDecorations = null,
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ImageConfiguration configuration = null,
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TableCellVerticalAlignment defaultVerticalAlignment = TableCellVerticalAlignment.top,
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TextBaseline? textBaseline = null,
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List<List<RenderBox>> children = null
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) {
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defaultColumnWidth = defaultColumnWidth ?? new FlexColumnWidth(1.0f);
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configuration = configuration ?? ImageConfiguration.empty;
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D.assert(columns == null || columns >= 0);
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D.assert(rows == null || rows >= 0);
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D.assert(rows == null || children == null);
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_columns = columns ?? (children != null && children.isNotEmpty() ? children[0].Count : 0);
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_rows = rows ?? 0;
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_children = new List<RenderBox>();
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for (int i = 0; i < _columns * _rows; i++) {
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_children.Add(null);
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}
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_columnWidths = columnWidths ?? new Dictionary<int, TableColumnWidth>();
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_defaultColumnWidth = defaultColumnWidth;
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_border = border;
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this.rowDecorations = rowDecorations;
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_configuration = configuration;
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_defaultVerticalAlignment = defaultVerticalAlignment;
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_textBaseline = textBaseline;
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if (children != null) {
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foreach (List<RenderBox> row in children) {
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addRow(row);
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}
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}
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}
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List<RenderBox> _children = new List<RenderBox>();
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public int columns {
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get { return _columns; }
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set {
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D.assert(value >= 0);
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if (value == columns) {
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return;
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}
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int oldColumns = columns;
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List<RenderBox> oldChildren = _children;
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_columns = value;
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_children = new List<RenderBox>();
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for (int i = 0; i < columns * rows; i++) {
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_children.Add(null);
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}
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int columnsToCopy = Mathf.Min(columns, oldColumns);
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for (int y = 0; y < rows; y++) {
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for (int x = 0; x < columnsToCopy; x++) {
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_children[x + y * columns] = oldChildren[x + y * oldColumns];
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}
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}
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if (oldColumns > columns) {
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for (int y = 0; y < rows; y++) {
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for (int x = columns; x < oldColumns; x++) {
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int xy = x + y * oldColumns;
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if (oldChildren[xy] != null) {
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dropChild(oldChildren[xy]);
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}
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}
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}
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}
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markNeedsLayout();
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}
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}
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int _columns;
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public int rows {
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get { return _rows; }
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set {
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D.assert(value >= 0);
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if (value == rows) {
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return;
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}
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if (_rows > value) {
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for (int xy = columns * value; xy < _children.Count; xy++) {
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if (_children[xy] != null) {
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dropChild(_children[xy]);
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}
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}
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}
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_rows = value;
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if (_children.Count > columns * rows) {
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_children.RemoveRange(columns * rows,
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_children.Count - columns * rows);
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}
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else if (_children.Count < columns * rows) {
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while (_children.Count < columns * rows) {
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_children.Add(null);
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}
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}
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D.assert(_children.Count == columns * rows);
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markNeedsLayout();
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}
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}
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int _rows;
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public Dictionary<int, TableColumnWidth> columnWidths {
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get { return _columnWidths; }
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set {
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value = value ?? new Dictionary<int, TableColumnWidth>();
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if (_columnWidths == value) {
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return;
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}
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_columnWidths = value;
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markNeedsLayout();
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}
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}
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Dictionary<int, TableColumnWidth> _columnWidths;
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public void setColumnWidth(int column, TableColumnWidth value) {
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if (_columnWidths.getOrDefault(column) == value) {
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return;
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}
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_columnWidths[column] = value;
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markNeedsLayout();
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;
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}
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public TableColumnWidth defaultColumnWidth {
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get { return _defaultColumnWidth; }
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set {
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D.assert(value != null);
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if (defaultColumnWidth == value) {
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return;
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}
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_defaultColumnWidth = value;
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markNeedsLayout();
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}
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}
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TableColumnWidth _defaultColumnWidth;
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public TableBorder border {
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get { return _border; }
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set {
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if (border == value) {
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return;
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}
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_border = value;
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markNeedsPaint();
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}
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}
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TableBorder _border;
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public List<Decoration> rowDecorations {
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get { return _rowDecorations ?? new List<Decoration>(); }
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set {
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if (_rowDecorations == value) {
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return;
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}
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_rowDecorations = value;
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if (_rowDecorationPainters != null) {
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foreach (BoxPainter painter in _rowDecorationPainters) {
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painter?.Dispose();
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}
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}
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if (_rowDecorations != null) {
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_rowDecorationPainters = new List<BoxPainter>();
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for (int i = 0; i < _rowDecorations.Count; i++) {
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_rowDecorationPainters.Add(null);
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}
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}
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else {
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_rowDecorationPainters = null;
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}
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}
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}
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List<Decoration> _rowDecorations;
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List<BoxPainter> _rowDecorationPainters;
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public ImageConfiguration configuration {
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get { return _configuration; }
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set {
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D.assert(value != null);
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if (value == _configuration) {
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return;
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}
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_configuration = value;
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markNeedsPaint();
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}
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}
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ImageConfiguration _configuration;
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public TableCellVerticalAlignment defaultVerticalAlignment {
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get { return _defaultVerticalAlignment; }
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set {
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if (_defaultVerticalAlignment == value) {
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return;
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}
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_defaultVerticalAlignment = value;
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markNeedsLayout();
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}
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}
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TableCellVerticalAlignment _defaultVerticalAlignment;
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public TextBaseline? textBaseline {
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get { return _textBaseline; }
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set {
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if (_textBaseline == value) {
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return;
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}
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_textBaseline = value;
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markNeedsLayout();
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}
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}
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TextBaseline? _textBaseline;
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public override void setupParentData(RenderObject child) {
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if (!(child.parentData is TableCellParentData)) {
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child.parentData = new TableCellParentData();
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}
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}
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public void setFlatChildren(int columns, List<RenderBox> cells) {
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if (cells == _children && columns == _columns) {
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return;
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}
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D.assert(columns >= 0);
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if (columns == 0 || cells.isEmpty()) {
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D.assert(cells == null || cells.isEmpty());
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_columns = columns;
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if (_children.isEmpty()) {
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D.assert(_rows == 0);
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return;
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}
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foreach (RenderBox oldChild in _children) {
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if (oldChild != null) {
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dropChild(oldChild);
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}
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}
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_rows = 0;
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_children.Clear();
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markNeedsLayout();
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return;
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}
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D.assert(cells != null);
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D.assert(cells.Count % columns == 0);
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HashSet<RenderBox> lostChildren = new HashSet<RenderBox>();
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int y, x;
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for (y = 0; y < _rows; y++) {
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for (x = 0; x < _columns; x++) {
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int xyOld = x + y * _columns;
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int xyNew = x + y * columns;
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if (_children[xyOld] != null &&
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(x >= columns || xyNew >= cells.Count || _children[xyOld] != cells[xyNew])) {
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lostChildren.Add(_children[xyOld]);
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}
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}
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}
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y = 0;
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while (y * columns < cells.Count) {
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for (x = 0; x < columns; x++) {
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int xyNew = x + y * columns;
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int xyOld = x + y * _columns;
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if (cells[xyNew] != null &&
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(x >= _columns || y >= _rows || _children[xyOld] != cells[xyNew])) {
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if (lostChildren.Contains(cells[xyNew])) {
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lostChildren.Remove(cells[xyNew]);
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}
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else {
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adoptChild(cells[xyNew]);
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}
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}
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}
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y += 1;
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}
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foreach (RenderBox child in lostChildren) {
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dropChild(child);
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}
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_columns = columns;
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_rows = cells.Count / columns;
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_children = cells;
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D.assert(_children.Count == rows * this.columns);
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markNeedsLayout();
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}
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void setChildren(List<List<RenderBox>> cells) {
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if (cells == null) {
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setFlatChildren(0, null);
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return;
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}
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foreach (RenderBox oldChild in _children) {
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if (oldChild != null) {
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dropChild(oldChild);
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}
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}
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_children.Clear();
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_columns = cells.isNotEmpty() ? cells[0].Count : 0;
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_rows = 0;
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foreach (List<RenderBox> row in cells) {
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addRow(row);
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}
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D.assert(_children.Count == rows * columns);
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}
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void addRow(List<RenderBox> cells) {
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D.assert(cells.Count == columns);
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D.assert(_children.Count == rows * columns);
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_rows += 1;
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_children.AddRange(cells);
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foreach (RenderBox cell in cells) {
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if (cell != null) {
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adoptChild(cell);
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}
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}
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markNeedsLayout();
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}
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public void setChild(int x, int y, RenderBox value) {
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D.assert(x >= 0 && x < columns && y >= 0 && y < rows);
|
|
D.assert(_children.Count == rows * columns);
|
|
|
|
int xy = x + y * columns;
|
|
RenderBox oldChild = _children[xy];
|
|
if (oldChild == value) {
|
|
return;
|
|
}
|
|
|
|
if (oldChild != null) {
|
|
dropChild(oldChild);
|
|
}
|
|
|
|
_children[xy] = value;
|
|
if (value != null) {
|
|
adoptChild(value);
|
|
}
|
|
}
|
|
|
|
|
|
public override void attach(object owner) {
|
|
base.attach(owner);
|
|
foreach (RenderBox child in _children) {
|
|
child?.attach(owner);
|
|
}
|
|
}
|
|
|
|
public override void detach() {
|
|
base.detach();
|
|
if (_rowDecorationPainters != null) {
|
|
foreach (BoxPainter painter in _rowDecorationPainters) {
|
|
painter?.Dispose();
|
|
}
|
|
|
|
_rowDecorationPainters = null;
|
|
}
|
|
|
|
foreach (RenderBox child in _children) {
|
|
child?.detach();
|
|
}
|
|
}
|
|
|
|
public override void visitChildren(RenderObjectVisitor visitor) {
|
|
D.assert(_children.Count == rows * columns);
|
|
foreach (RenderBox child in _children) {
|
|
if (child != null) {
|
|
visitor(child);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected override float computeMinIntrinsicWidth(float height) {
|
|
D.assert(_children.Count == rows * columns);
|
|
float totalMinWidth = 0.0f;
|
|
for (int x = 0; x < columns; x++) {
|
|
TableColumnWidth columnWidth = _columnWidths.getOrDefault(x) ?? defaultColumnWidth;
|
|
List<RenderBox> columnCells = column(x);
|
|
totalMinWidth += columnWidth.minIntrinsicWidth(columnCells, float.PositiveInfinity);
|
|
}
|
|
|
|
return totalMinWidth;
|
|
}
|
|
|
|
protected override float computeMaxIntrinsicWidth(float height) {
|
|
D.assert(_children.Count == rows * columns);
|
|
float totalMaxWidth = 0.0f;
|
|
for (int x = 0; x < columns; x++) {
|
|
TableColumnWidth columnWidth = _columnWidths.getOrDefault(x) ?? defaultColumnWidth;
|
|
List<RenderBox> columnCells = column(x);
|
|
totalMaxWidth += columnWidth.maxIntrinsicWidth(columnCells, float.PositiveInfinity);
|
|
}
|
|
|
|
return totalMaxWidth;
|
|
}
|
|
|
|
protected override float computeMinIntrinsicHeight(float width) {
|
|
D.assert(_children.Count == rows * columns);
|
|
List<float> widths = _computeColumnWidths(BoxConstraints.tightForFinite(width: width));
|
|
float rowTop = 0.0f;
|
|
for (int y = 0; y < rows; y++) {
|
|
float rowHeight = 0.0f;
|
|
for (int x = 0; x < columns; x++) {
|
|
int xy = x + y * columns;
|
|
RenderBox child = _children[xy];
|
|
if (child != null) {
|
|
rowHeight = Mathf.Max(rowHeight, child.getMaxIntrinsicHeight(widths[x]));
|
|
}
|
|
}
|
|
|
|
rowTop += rowHeight;
|
|
}
|
|
|
|
return rowTop;
|
|
}
|
|
|
|
protected internal override float computeMaxIntrinsicHeight(float width) {
|
|
return computeMinIntrinsicHeight(width);
|
|
}
|
|
|
|
float? _baselineDistance;
|
|
|
|
protected override float? computeDistanceToActualBaseline(TextBaseline baseline) {
|
|
return _baselineDistance;
|
|
}
|
|
|
|
List<RenderBox> column(int x) {
|
|
List<RenderBox> ret = new List<RenderBox>();
|
|
for (int y = 0; y < rows; y++) {
|
|
int xy = x + y * columns;
|
|
RenderBox child = _children[xy];
|
|
if (child != null) {
|
|
ret.Add(child);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
List<RenderBox> row(int y) {
|
|
List<RenderBox> ret = new List<RenderBox>();
|
|
int start = y * columns;
|
|
int end = (y + 1) * columns;
|
|
for (int xy = start; xy < end; xy++) {
|
|
RenderBox child = _children[xy];
|
|
if (child != null) {
|
|
ret.Add(child);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
List<float> _computeColumnWidths(BoxConstraints constraints) {
|
|
D.assert(constraints != null);
|
|
D.assert(_children.Count == rows * columns);
|
|
|
|
List<float> widths = new List<float>();
|
|
List<float> minWidths = new List<float>();
|
|
List<float?> flexes = new List<float?>();
|
|
|
|
for (int i = 0; i < columns; i++) {
|
|
widths.Add(0.0f);
|
|
minWidths.Add(0.0f);
|
|
flexes.Add(null);
|
|
}
|
|
|
|
float tableWidth = 0.0f;
|
|
float? unflexedTableWidth = 0.0f;
|
|
float totalFlex = 0.0f;
|
|
|
|
for (int x = 0; x < columns; x++) {
|
|
TableColumnWidth columnWidth = _columnWidths.getOrDefault(x) ?? defaultColumnWidth;
|
|
List<RenderBox> columnCells = column(x);
|
|
|
|
float maxIntrinsicWidth = columnWidth.maxIntrinsicWidth(columnCells, constraints.maxWidth);
|
|
D.assert(maxIntrinsicWidth.isFinite());
|
|
D.assert(maxIntrinsicWidth >= 0.0f);
|
|
widths[x] = maxIntrinsicWidth;
|
|
tableWidth += maxIntrinsicWidth;
|
|
|
|
float minIntrinsicWidth = columnWidth.minIntrinsicWidth(columnCells, constraints.maxWidth);
|
|
D.assert(minIntrinsicWidth.isFinite());
|
|
D.assert(minIntrinsicWidth >= 0.0f);
|
|
minWidths[x] = minIntrinsicWidth;
|
|
D.assert(maxIntrinsicWidth >= minIntrinsicWidth);
|
|
|
|
float? flex = columnWidth.flex(columnCells);
|
|
if (flex != null) {
|
|
D.assert(flex.Value.isFinite());
|
|
D.assert(flex.Value > 0.0f);
|
|
flexes[x] = flex;
|
|
totalFlex += flex.Value;
|
|
}
|
|
else {
|
|
unflexedTableWidth += maxIntrinsicWidth;
|
|
}
|
|
}
|
|
|
|
float maxWidthConstraint = constraints.maxWidth;
|
|
float minWidthConstraint = constraints.minWidth;
|
|
|
|
if (totalFlex > 0.0f) {
|
|
float targetWidth = 0.0f;
|
|
if (maxWidthConstraint.isFinite()) {
|
|
targetWidth = maxWidthConstraint;
|
|
}
|
|
else {
|
|
targetWidth = minWidthConstraint;
|
|
}
|
|
|
|
if (tableWidth < targetWidth) {
|
|
float remainingWidth = targetWidth - unflexedTableWidth.Value;
|
|
D.assert(remainingWidth.isFinite());
|
|
D.assert(remainingWidth >= 0.0f);
|
|
for (int x = 0; x < columns; x++) {
|
|
if (flexes[x] != null) {
|
|
float flexedWidth = remainingWidth * flexes[x].Value / totalFlex;
|
|
D.assert(flexedWidth.isFinite());
|
|
D.assert(flexedWidth >= 0.0f);
|
|
if (widths[x] < flexedWidth) {
|
|
float delta = flexedWidth - widths[x];
|
|
tableWidth += delta;
|
|
widths[x] = flexedWidth;
|
|
}
|
|
}
|
|
}
|
|
|
|
D.assert(tableWidth >= targetWidth);
|
|
}
|
|
}
|
|
else if (tableWidth < minWidthConstraint) {
|
|
float delta = (minWidthConstraint - tableWidth) / columns;
|
|
for (int x = 0; x < columns; x++) {
|
|
widths[x] += delta;
|
|
}
|
|
|
|
tableWidth = minWidthConstraint;
|
|
}
|
|
|
|
D.assert(() => {
|
|
unflexedTableWidth = null;
|
|
return true;
|
|
});
|
|
|
|
if (tableWidth > maxWidthConstraint) {
|
|
float deficit = tableWidth - maxWidthConstraint;
|
|
|
|
int availableColumns = columns;
|
|
|
|
//(Xingwei Zhu) this deficit is double and set to be 0.00000001f in flutter.
|
|
//since we use float by default, making it larger should make sense in most cases
|
|
float minimumDeficit = 0.0001f;
|
|
while (deficit > minimumDeficit && totalFlex > minimumDeficit) {
|
|
float newTotalFlex = 0.0f;
|
|
for (int x = 0; x < columns; x++) {
|
|
if (flexes[x] != null) {
|
|
//(Xingwei Zhu) in case deficit * flexes[x].Value / totalFlex => 0 if deficit is really small, leading to dead loop,
|
|
//we amend it with a default larger value to ensure that this loop will eventually end
|
|
float newWidth =
|
|
widths[x] - Mathf.Max(minimumDeficit, deficit * flexes[x].Value / totalFlex);
|
|
D.assert(newWidth.isFinite());
|
|
if (newWidth <= minWidths[x]) {
|
|
deficit -= widths[x] - minWidths[x];
|
|
widths[x] = minWidths[x];
|
|
flexes[x] = null;
|
|
availableColumns -= 1;
|
|
}
|
|
else {
|
|
deficit -= widths[x] - newWidth;
|
|
widths[x] = newWidth;
|
|
newTotalFlex += flexes[x].Value;
|
|
}
|
|
|
|
D.assert(widths[x] >= 0.0f);
|
|
}
|
|
}
|
|
|
|
totalFlex = newTotalFlex;
|
|
}
|
|
|
|
if (deficit > 0.0f) {
|
|
do {
|
|
float delta = deficit / availableColumns;
|
|
int newAvailableColumns = 0;
|
|
for (int x = 0; x < columns; x++) {
|
|
float availableDelta = widths[x] - minWidths[x];
|
|
if (availableDelta > 0.0f) {
|
|
if (availableDelta <= delta) {
|
|
deficit -= widths[x] - minWidths[x];
|
|
widths[x] = minWidths[x];
|
|
}
|
|
else {
|
|
deficit -= availableDelta;
|
|
widths[x] -= availableDelta;
|
|
newAvailableColumns += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
availableColumns = newAvailableColumns;
|
|
} while (deficit > 0.0f && availableColumns > 0);
|
|
}
|
|
}
|
|
|
|
return widths;
|
|
}
|
|
|
|
readonly List<float> _rowTops = new List<float>();
|
|
List<float> _columnLefts;
|
|
|
|
Rect getRowBox(int row) {
|
|
D.assert(row >= 0);
|
|
D.assert(row < rows);
|
|
|
|
return Rect.fromLTRB(0.0f, _rowTops[row], size.width, _rowTops[row + 1]);
|
|
}
|
|
|
|
protected override void performLayout() {
|
|
int rows = this.rows;
|
|
int columns = this.columns;
|
|
D.assert(_children.Count == rows * columns);
|
|
if (rows * columns == 0) {
|
|
size = constraints.constrain(new Size(0.0f, 0.0f));
|
|
return;
|
|
}
|
|
|
|
List<float> widths = _computeColumnWidths(constraints);
|
|
List<float> positions = new List<float>();
|
|
float tableWidth = 0.0f;
|
|
positions.Add(0.0f);
|
|
for (int x = 1; x < columns; x++) {
|
|
positions.Add(positions[x - 1] + widths[x - 1]);
|
|
}
|
|
|
|
_columnLefts = positions;
|
|
tableWidth = positions[positions.Count - 1] + widths[widths.Count - 1];
|
|
|
|
_rowTops.Clear();
|
|
_baselineDistance = null;
|
|
|
|
float rowTop = 0.0f;
|
|
for (int y = 0; y < rows; y++) {
|
|
_rowTops.Add(rowTop);
|
|
float rowHeight = 0.0f;
|
|
bool haveBaseline = false;
|
|
float beforeBaselineDistance = 0.0f;
|
|
float afterBaselineDistance = 0.0f;
|
|
List<float?> baselines = new List<float?>();
|
|
for (int i = 0; i < columns; i++) {
|
|
baselines.Add(null);
|
|
}
|
|
|
|
for (int x = 0; x < columns; x++) {
|
|
int xy = x + y * columns;
|
|
RenderBox child = _children[xy];
|
|
if (child != null) {
|
|
TableCellParentData childParentData = (TableCellParentData) child.parentData;
|
|
D.assert(childParentData != null);
|
|
childParentData.x = x;
|
|
childParentData.y = y;
|
|
switch (childParentData.verticalAlignment ?? defaultVerticalAlignment) {
|
|
case TableCellVerticalAlignment.baseline: {
|
|
D.assert(textBaseline != null);
|
|
child.layout(BoxConstraints.tightFor(width: widths[x]), parentUsesSize: true);
|
|
float? childBaseline =
|
|
child.getDistanceToBaseline(textBaseline.Value, onlyReal: true);
|
|
if (childBaseline != null) {
|
|
beforeBaselineDistance = Mathf.Max(beforeBaselineDistance, childBaseline.Value);
|
|
afterBaselineDistance = Mathf.Max(afterBaselineDistance,
|
|
child.size.height - childBaseline.Value);
|
|
baselines[x] = childBaseline.Value;
|
|
haveBaseline = true;
|
|
}
|
|
else {
|
|
rowHeight = Mathf.Max(rowHeight, child.size.height);
|
|
childParentData.offset = new Offset(positions[x], rowTop);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.top:
|
|
case TableCellVerticalAlignment.middle:
|
|
case TableCellVerticalAlignment.bottom: {
|
|
child.layout(BoxConstraints.tightFor(width: widths[x]), parentUsesSize: true);
|
|
rowHeight = Mathf.Max(rowHeight, child.size.height);
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.fill: {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (haveBaseline) {
|
|
if (y == 0) {
|
|
_baselineDistance = beforeBaselineDistance;
|
|
}
|
|
|
|
rowHeight = Mathf.Max(rowHeight, beforeBaselineDistance + afterBaselineDistance);
|
|
}
|
|
|
|
for (int x = 0; x < columns; x++) {
|
|
int xy = x + y * columns;
|
|
RenderBox child = _children[xy];
|
|
if (child != null) {
|
|
TableCellParentData childParentData = (TableCellParentData) child.parentData;
|
|
switch (childParentData.verticalAlignment ?? defaultVerticalAlignment) {
|
|
case TableCellVerticalAlignment.baseline: {
|
|
if (baselines[x] != null) {
|
|
childParentData.offset = new Offset(positions[x],
|
|
rowTop + beforeBaselineDistance - baselines[x].Value);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.top: {
|
|
childParentData.offset = new Offset(positions[x], rowTop);
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.middle: {
|
|
childParentData.offset = new Offset(positions[x],
|
|
rowTop + (rowHeight - child.size.height) / 2.0f);
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.bottom: {
|
|
childParentData.offset =
|
|
new Offset(positions[x], rowTop + rowHeight - child.size.height);
|
|
break;
|
|
}
|
|
case TableCellVerticalAlignment.fill: {
|
|
child.layout(BoxConstraints.tightFor(width: widths[x], height: rowHeight));
|
|
childParentData.offset = new Offset(positions[x], rowTop);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
rowTop += rowHeight;
|
|
}
|
|
|
|
_rowTops.Add(rowTop);
|
|
size = constraints.constrain(new Size(tableWidth, rowTop));
|
|
D.assert(_rowTops.Count == rows + 1);
|
|
}
|
|
|
|
protected override bool hitTestChildren(BoxHitTestResult result, Offset position = null) {
|
|
D.assert(_children.Count == rows * columns);
|
|
for (int index = _children.Count - 1; index >= 0; index--) {
|
|
RenderBox child = _children[index];
|
|
if (child != null) {
|
|
BoxParentData childParentData = (BoxParentData) child.parentData;
|
|
bool isHit = result.addWithPaintOffset(
|
|
offset: childParentData.offset,
|
|
position: position,
|
|
hitTest: (BoxHitTestResult resultIn, Offset transformed) => {
|
|
D.assert(transformed == position - childParentData.offset);
|
|
return child.hitTest(resultIn, position: transformed);
|
|
}
|
|
);
|
|
if (isHit) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public override void paint(PaintingContext context, Offset offset) {
|
|
D.assert(_children.Count == this.rows * this.columns);
|
|
if (this.rows * this.columns == 0) {
|
|
if (border != null) {
|
|
Rect borderRect = Rect.fromLTWH(offset.dx, offset.dy, size.width, 0.0f);
|
|
border.paint(context.canvas, borderRect, rows: new List<float>(), columns: new List<float>());
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
D.assert(_rowTops.Count == this.rows + 1);
|
|
if (_rowDecorations != null) {
|
|
Canvas canvas = context.canvas;
|
|
for (int y = 0; y < rows; y++) {
|
|
if (_rowDecorations.Count <= y) {
|
|
break;
|
|
}
|
|
|
|
if (_rowDecorations[y] != null) {
|
|
_rowDecorationPainters[y] = _rowDecorationPainters[y] ??
|
|
_rowDecorations[y].createBoxPainter(markNeedsPaint);
|
|
_rowDecorationPainters[y].paint(
|
|
canvas,
|
|
new Offset(offset.dx, offset.dy + _rowTops[y]),
|
|
configuration.copyWith(
|
|
size: new Size(size.width, _rowTops[y + 1] - _rowTops[y])
|
|
)
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int index = 0; index < _children.Count; index++) {
|
|
RenderBox child = _children[index];
|
|
if (child != null) {
|
|
BoxParentData childParentData = (BoxParentData) child.parentData;
|
|
context.paintChild(child, childParentData.offset + offset);
|
|
}
|
|
}
|
|
|
|
D.assert(_rows == _rowTops.Count - 1);
|
|
D.assert(_columns == _columnLefts.Count);
|
|
if (border != null) {
|
|
Rect borderRect = Rect.fromLTWH(offset.dx, offset.dy, size.width,
|
|
_rowTops[_rowTops.Count - 1]);
|
|
List<float> rows = _rowTops.GetRange(1, _rowTops.Count - 2);
|
|
List<float> columns = _columnLefts.GetRange(1, _columnLefts.Count - 1);
|
|
border.paint(context.canvas, borderRect, rows: rows, columns: columns);
|
|
}
|
|
}
|
|
|
|
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
|
|
base.debugFillProperties(properties);
|
|
properties.add(new DiagnosticsProperty<TableBorder>("border", border, defaultValue: null));
|
|
properties.add(new DiagnosticsProperty<Dictionary<int, TableColumnWidth>>("specified column widths",
|
|
_columnWidths,
|
|
level: _columnWidths.isEmpty() ? DiagnosticLevel.hidden : DiagnosticLevel.info));
|
|
properties.add(new DiagnosticsProperty<TableColumnWidth>("default column width", defaultColumnWidth));
|
|
properties.add(new MessageProperty("table size", $"{columns}*{rows}"));
|
|
properties.add(new EnumerableProperty<float>("column offsets", _columnLefts, ifNull: "unknown"));
|
|
properties.add(new EnumerableProperty<float>("row offsets", _rowTops, ifNull: "unknown"));
|
|
}
|
|
|
|
public override List<DiagnosticsNode> debugDescribeChildren() {
|
|
if (_children.isEmpty()) {
|
|
return new List<DiagnosticsNode> {DiagnosticsNode.message("table is empty")};
|
|
}
|
|
|
|
List<DiagnosticsNode> children = new List<DiagnosticsNode>();
|
|
for (int y = 0; y < rows; y++) {
|
|
for (int x = 0; x < columns; x++) {
|
|
int xy = x + y * columns;
|
|
RenderBox child = _children[xy];
|
|
string name = $"child ({x}, {y})";
|
|
if (child != null) {
|
|
children.Add(child.toDiagnosticsNode(name: name));
|
|
}
|
|
else {
|
|
children.Add(new DiagnosticsProperty<object>(name, null, ifNull: "is null",
|
|
showSeparator: false));
|
|
}
|
|
}
|
|
}
|
|
|
|
return children;
|
|
}
|
|
}
|
|
}
|