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435 行
17 KiB
435 行
17 KiB
using System.Collections.Generic;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.service;
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using Unity.UIWidgets.ui;
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using Unity.UIWidgets.widgets;
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using UnityEngine;
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using Canvas = Unity.UIWidgets.ui.Canvas;
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using Color = Unity.UIWidgets.ui.Color;
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using Rect = Unity.UIWidgets.ui.Rect;
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using TextStyle = Unity.UIWidgets.painting.TextStyle;
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using Transform = Unity.UIWidgets.widgets.Transform;
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namespace Unity.UIWidgets.cupertino {
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public static class CupertinoTextSelectionUtils {
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// public static readonly TextSelectionControls cupertinoTextSelectionControls = new _CupertinoTextSelectionControls();
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public const float _kSelectionHandleOverlap = 1.5f;
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public const float _kSelectionHandleRadius = 6;
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public const float _kArrowScreenPadding = 26.0f;
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public const float _kToolbarContentDistance = 8.0f;
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public const float _kHandlesPadding = 18.0f;
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public const float _kToolbarScreenPadding = 8.0f;
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public const float _kToolbarHeight = 43.0f;
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public static readonly Size _kToolbarArrowSize = new Size(14.0f, 7.0f);
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public static readonly Radius _kToolbarBorderRadius = Radius.circular(8);
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public static readonly Color _kToolbarBackgroundColor = new Color(0xEB202020);
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public static readonly Color _kToolbarDividerColor = new Color(0xFF808080);
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public static readonly Color _kHandlesColor = new Color(0xFF136FE0);
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public static readonly Size _kSelectionOffset = new Size(20.0f, 30.0f);
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public static readonly Size _kToolbarTriangleSize = new Size(18.0f, 9.0f);
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public static readonly EdgeInsets _kToolbarButtonPadding =
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EdgeInsets.symmetric(vertical: 10.0f, horizontal: 18.0f);
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public static readonly TextStyle _kToolbarButtonFontStyle = new TextStyle(
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inherit: false,
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fontSize: 14.0f,
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letterSpacing: -0.15f,
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fontWeight: FontWeight.w400,
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color: CupertinoColors.white
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);
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}
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class CupertinoTextSelectionToolbar : SingleChildRenderObjectWidget {
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public CupertinoTextSelectionToolbar(
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Key key = null,
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float barTopY = 0.0f,
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float arrowTipX = 0.0f,
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bool isArrowPointingDown = false,
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Widget child = null
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) : base(key: key, child: child) {
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_barTopY = barTopY;
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_arrowTipX = arrowTipX;
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_isArrowPointingDown = isArrowPointingDown;
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}
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public readonly float _barTopY;
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public readonly float _arrowTipX;
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public readonly bool _isArrowPointingDown;
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public override RenderObject createRenderObject(BuildContext context) => new _ToolbarRenderBox(_barTopY, _arrowTipX, _isArrowPointingDown, null);
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public void updateRenderObject(BuildContext context, _ToolbarRenderBox renderObject) {
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renderObject.barTopY = _barTopY;
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renderObject.arrowTipX = _arrowTipX;
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renderObject.isArrowPointingDown = _isArrowPointingDown;
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}
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}
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class _ToolbarParentData : BoxParentData {
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public float arrowXOffsetFromCenter;
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public override string ToString() => $"offset = {offset}," + $"arrowXOffsetFromCenter={arrowXOffsetFromCenter}";
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}
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class _ToolbarRenderBox : RenderShiftedBox {
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public _ToolbarRenderBox(
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float _barTopY = 0.0f,
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float _arrowTipX = 0.0f,
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bool _isArrowPointingDown = false,
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RenderBox child = null) : base(child) {
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this._barTopY = _barTopY;
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this._arrowTipX = _arrowTipX;
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this._isArrowPointingDown = _isArrowPointingDown;
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}
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public override bool isRepaintBoundary {
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get { return true; }
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}
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float _barTopY;
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public float barTopY {
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set {
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if (_barTopY == value) {
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return;
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}
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_barTopY = value;
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markNeedsLayout();
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//markNeedsSemanticsUpdate();
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}
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}
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float _arrowTipX;
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public float arrowTipX {
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set {
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if (_arrowTipX == value) {
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return;
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}
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_arrowTipX = value;
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markNeedsLayout();
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//markNeedsSemanticsUpdate();
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}
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}
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bool _isArrowPointingDown;
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public bool isArrowPointingDown {
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set {
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if (_isArrowPointingDown == value) {
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return;
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}
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_isArrowPointingDown = value;
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markNeedsLayout();
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//markNeedsSemanticsUpdate();
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}
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}
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public readonly BoxConstraints heightConstraint = BoxConstraints.tightFor(height: CupertinoTextSelectionUtils._kToolbarHeight);
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public override void setupParentData(RenderObject child) {
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if (!(child.parentData is _ToolbarParentData)) {
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child.parentData = new _ToolbarParentData();
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}
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}
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protected override void performLayout() {
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BoxConstraints constraints = this.constraints;
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size = constraints.biggest;
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if (child == null) {
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return;
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}
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BoxConstraints enforcedConstraint = constraints
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.deflate( EdgeInsets.symmetric(horizontal: CupertinoTextSelectionUtils._kToolbarScreenPadding))
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.loosen();
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child.layout(heightConstraint.enforce(enforcedConstraint), parentUsesSize: true);
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_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
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float lowerBound = child.size.width/2 + CupertinoTextSelectionUtils._kToolbarScreenPadding;
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float upperBound = size.width - child.size.width/2 - CupertinoTextSelectionUtils._kToolbarScreenPadding;
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float adjustedCenterX = _arrowTipX.clamp(lowerBound, upperBound) ;
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childParentData.offset = new Offset(adjustedCenterX - child.size.width / 2, _barTopY );
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childParentData.arrowXOffsetFromCenter = _arrowTipX - adjustedCenterX ;
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}
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Path _clipPath() {
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_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
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Path rrect = new Path();
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rrect.addRRect(
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RRect.fromRectAndRadius(
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new Offset(0, _isArrowPointingDown ? 0 : CupertinoTextSelectionUtils._kToolbarArrowSize.height)
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& new Size(child.size.width, child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height),
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CupertinoTextSelectionUtils._kToolbarBorderRadius
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));
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float arrowTipX = child.size.width / 2 + childParentData.arrowXOffsetFromCenter;
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float arrowBottomY = _isArrowPointingDown
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? child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height
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: CupertinoTextSelectionUtils._kToolbarArrowSize.height;
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float arrowTipY = _isArrowPointingDown ? child.size.height : 0;
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Path arrow = new Path();
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arrow.moveTo(arrowTipX, arrowTipY);
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arrow.lineTo(arrowTipX - CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
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arrow.lineTo(arrowTipX + CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
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arrow.close();
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return Path.combine(PathOperation.union, rrect, arrow);
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}
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public override void paint(PaintingContext context, Offset offset) {
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if (child == null) {
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return;
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}
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_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
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context.pushClipPath(
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needsCompositing,
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offset + childParentData.offset,
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Offset.zero & child.size,
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_clipPath(),
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(PaintingContext innerContext, Offset innerOffset) => innerContext.paintChild(child, innerOffset)
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);
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}
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Paint _debugPaint;
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protected override void debugPaintSize(PaintingContext context, Offset offset) {
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D.assert(() => {
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if (child == null) {
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return true;
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}
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//_debugPaint ??= new Paint()
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if (_debugPaint == null) {
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_debugPaint = new Paint();
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}
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_debugPaint.shader = ui.Gradient.linear(
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new Offset(0.0f, 0.0f),
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new Offset(10.0f, 10.0f),
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new List<Color> {
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new Color(0x00000000), new Color(0xFFFF00FF), new Color(0xFFFF00FF),
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new Color(0x00000000)
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},
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new List<float> {0.25f, 0.25f, 0.75f, 0.75f},
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TileMode.repeated
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);
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_debugPaint.strokeWidth = 2.0f;
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_debugPaint.style = PaintingStyle.stroke;
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_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
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context.canvas.drawPath(_clipPath().shift(offset + childParentData.offset), _debugPaint);
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return true;
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});
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}
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}
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public class _TextSelectionHandlePainter : AbstractCustomPainter {
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public _TextSelectionHandlePainter(Color color) {
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this.color = color;
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}
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public readonly Color color;
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public override void paint(Canvas canvas, Size size) {
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float halfStrokeWidth = 1.0f;
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Paint paint = new Paint();
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paint.color = color;
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Rect circle = Rect.fromCircle(
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center: new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius, CupertinoTextSelectionUtils._kSelectionHandleRadius),
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radius: CupertinoTextSelectionUtils._kSelectionHandleRadius
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);
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Rect line = Rect.fromPoints(
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new Offset(
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CupertinoTextSelectionUtils._kSelectionHandleRadius - halfStrokeWidth,
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2 * CupertinoTextSelectionUtils._kSelectionHandleRadius - CupertinoTextSelectionUtils._kSelectionHandleOverlap
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),
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new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius + halfStrokeWidth, size.height)
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);
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Path path = new Path();
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path.addOval(circle);
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// Draw line so it slightly overlaps the circle.
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path.addRect(line);
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canvas.drawPath(path, paint);
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}
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public override bool shouldRepaint(CustomPainter oldPainter) {
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oldPainter = (_TextSelectionHandlePainter)oldPainter;
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return color != ((_TextSelectionHandlePainter)oldPainter).color;
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}
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public bool? hitTest(Offset position) {
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return null;
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}
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public void addListener(VoidCallback listener) {
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base.addListener(listener);
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}
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public void removeListener(VoidCallback listener) {
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base.removeListener(listener);
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}
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}
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public delegate bool Predicate(TextSelectionDelegate _delegate);
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public delegate void OnPressed(TextSelectionDelegate _delegate);
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class _CupertinoTextSelectionControls : TextSelectionControls {
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public override Size getHandleSize(float textLineHeight) {
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return new Size(
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CupertinoTextSelectionUtils._kSelectionHandleRadius * 2,
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textLineHeight + CupertinoTextSelectionUtils._kSelectionHandleRadius * 2 - CupertinoTextSelectionUtils._kSelectionHandleOverlap
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);
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}
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public override Widget buildToolbar(
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BuildContext context,
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Rect globalEditableRegion,
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float textLineHeight,
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Offset position,
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List<TextSelectionPoint> endpoints,
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TextSelectionDelegate _delegate
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)
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{
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D.assert(WidgetsD.debugCheckHasMediaQuery(context));
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MediaQueryData mediaQuery = MediaQuery.of(context);
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float toolbarHeightNeeded = mediaQuery.padding.top
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+ CupertinoTextSelectionUtils._kToolbarScreenPadding
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+ CupertinoTextSelectionUtils._kToolbarHeight
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+ CupertinoTextSelectionUtils._kToolbarContentDistance;
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float availableHeight = globalEditableRegion.top + endpoints.first().point.dy - textLineHeight;
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bool isArrowPointingDown = toolbarHeightNeeded <= availableHeight;
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float arrowTipX = (position.dx + globalEditableRegion.left).clamp(
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CupertinoTextSelectionUtils._kArrowScreenPadding + mediaQuery.padding.left,
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mediaQuery.size.width - mediaQuery.padding.right - CupertinoTextSelectionUtils._kArrowScreenPadding
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) ;
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float localBarTopY = isArrowPointingDown
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? endpoints.first().point.dy - textLineHeight - CupertinoTextSelectionUtils._kToolbarContentDistance - CupertinoTextSelectionUtils._kToolbarHeight
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: endpoints.last().point.dy + CupertinoTextSelectionUtils._kToolbarContentDistance;
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List<Widget> items = new List<Widget>{};
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Widget onePhysicalPixelVerticalDivider = new SizedBox(width: 1.0f / MediaQuery.of(context).devicePixelRatio);
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CupertinoLocalizations localizations = CupertinoLocalizations.of(context);
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EdgeInsets arrowPadding = isArrowPointingDown
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? EdgeInsets.only(bottom: CupertinoTextSelectionUtils._kToolbarArrowSize.height)
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: EdgeInsets.only(top: CupertinoTextSelectionUtils._kToolbarArrowSize.height);
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void addToolbarButtonIfNeeded(
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string text,
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Predicate predicate,
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OnPressed onPressed) {
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if (!predicate(_delegate)) {
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return;
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}
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if (items.isNotEmpty()) {
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items.Add(onePhysicalPixelVerticalDivider);
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}
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items.Add(new CupertinoButton(
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child: new Text(text, style:CupertinoTextSelectionUtils. _kToolbarButtonFontStyle),
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color: CupertinoTextSelectionUtils._kToolbarBackgroundColor,
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minSize: CupertinoTextSelectionUtils._kToolbarHeight,
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padding: CupertinoTextSelectionUtils._kToolbarButtonPadding.add(arrowPadding),
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borderRadius: null,
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pressedOpacity: 0.7f,
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onPressed: () => onPressed(_delegate)
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));
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}
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addToolbarButtonIfNeeded(localizations.cutButtonLabel, canCut, handleCut);
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addToolbarButtonIfNeeded(localizations.copyButtonLabel, canCopy, handleCopy);
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addToolbarButtonIfNeeded(localizations.pasteButtonLabel, canPaste, handlePaste);
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addToolbarButtonIfNeeded(localizations.selectAllButtonLabel, canSelectAll, handleSelectAll);
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return new CupertinoTextSelectionToolbar(
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barTopY: localBarTopY + globalEditableRegion.top,
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arrowTipX: arrowTipX,
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isArrowPointingDown: isArrowPointingDown,
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child: items.isEmpty() ? null : new DecoratedBox(
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decoration: new BoxDecoration(color: CupertinoTextSelectionUtils._kToolbarDividerColor),
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child: new Row(mainAxisSize: MainAxisSize.min, children: items)
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)
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);
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}
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public override Widget buildHandle(BuildContext context, TextSelectionHandleType type, float textLineHeight) {
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Size desiredSize = getHandleSize(textLineHeight);
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Widget handle = SizedBox.fromSize(
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size: desiredSize,
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child: new CustomPaint(
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painter: new _TextSelectionHandlePainter(CupertinoTheme.of(context).primaryColor)
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)
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);
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var result = Matrix4.identity();
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result.translate(desiredSize.width / 2, desiredSize.height / 2);
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result.rotateZ(Mathf.PI);
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result.translate(-desiredSize.width / 2, -desiredSize.height / 2);
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switch (type) {
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case TextSelectionHandleType.left:
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return handle;
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case TextSelectionHandleType.right:
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return new Transform(
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transform: result,
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child: handle
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);
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case TextSelectionHandleType.collapsed:
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return new SizedBox();
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}
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D.assert(type != null);
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return null;
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}
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public override Offset getHandleAnchor(TextSelectionHandleType type, float textLineHeight) {
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Size handleSize = getHandleSize(textLineHeight);
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switch (type) {
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case TextSelectionHandleType.left:
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return new Offset(
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handleSize.width / 2,
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handleSize.height
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);
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case TextSelectionHandleType.right:
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return new Offset(
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handleSize.width / 2,
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handleSize.height - 2 * CupertinoTextSelectionUtils._kSelectionHandleRadius + CupertinoTextSelectionUtils._kSelectionHandleOverlap
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);
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default:
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return new Offset(
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handleSize.width / 2,
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textLineHeight + (handleSize.height - textLineHeight) / 2
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);
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}
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}
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}
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}
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