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using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.rendering;
using Unity.UIWidgets.service;
using Unity.UIWidgets.ui;
using Unity.UIWidgets.widgets;
using UnityEngine;
using Canvas = Unity.UIWidgets.ui.Canvas;
using Color = Unity.UIWidgets.ui.Color;
using Rect = Unity.UIWidgets.ui.Rect;
using TextStyle = Unity.UIWidgets.painting.TextStyle;
using Transform = Unity.UIWidgets.widgets.Transform;
namespace Unity.UIWidgets.cupertino {
public static class CupertinoTextSelectionUtils {
public static readonly TextSelectionControls cupertinoTextSelectionControls = new _CupertinoTextSelectionControls();
public const float _kSelectionHandleOverlap = 1.5f;
public const float _kSelectionHandleRadius = 6;
public const float _kArrowScreenPadding = 26.0f;
public const float _kToolbarContentDistance = 8.0f;
public const float _kHandlesPadding = 18.0f;
public const float _kToolbarScreenPadding = 8.0f;
public const float _kToolbarHeight = 43.0f;
public static readonly Size _kToolbarArrowSize = new Size(14.0f, 7.0f);
//public static readonly Radius _kToolbarBorderRadius = Radius.circular(8);
public static readonly BorderRadius _kToolbarBorderRadius = BorderRadius.all(Radius.circular(7.5f));
public static readonly Color _kToolbarBackgroundColor = new Color(0xFF2E2E2E);
public static readonly Color _kToolbarDividerColor = new Color(0xFFB9B9B9);
public static readonly Color _kHandlesColor = new Color(0xFF136FE0);
public static readonly Size _kSelectionOffset = new Size(20.0f, 30.0f);
public static readonly Size _kToolbarTriangleSize = new Size(18.0f, 9.0f);
public static readonly EdgeInsets _kToolbarButtonPadding =
EdgeInsets.symmetric(vertical: 10.0f, horizontal: 18.0f);
//public static readonly BorderRadius _kToolbarBorderRadius = BorderRadius.all(Radius.circular(7.5f));
public static readonly TextStyle _kToolbarButtonFontStyle = new TextStyle(
fontSize: 14.0f,
letterSpacing: -0.15f,
fontWeight: FontWeight.w400,
color: CupertinoColors.white
);
}
/* class CupertinoTextSelectionToolbar : SingleChildRenderObjectWidget {
public CupertinoTextSelectionToolbar(
Key key = null,
float barTopY = 0.0f,
float arrowTipX = 0.0f,
bool isArrowPointingDown = false,
Widget child = null
) : base(key: key, child: child) {
_barTopY = barTopY;
_arrowTipX = arrowTipX;
_isArrowPointingDown = isArrowPointingDown;
}
public readonly float _barTopY;
public readonly float _arrowTipX;
public readonly bool _isArrowPointingDown;
public override RenderObject createRenderObject(BuildContext context) => new _ToolbarRenderBox(_barTopY, _arrowTipX, _isArrowPointingDown, null);
public void updateRenderObject(BuildContext context, _ToolbarRenderBox renderObject) {
renderObject.barTopY = _barTopY;
renderObject.arrowTipX = _arrowTipX;
renderObject.isArrowPointingDown = _isArrowPointingDown;
}
}
class _ToolbarParentData : BoxParentData {
public float arrowXOffsetFromCenter;
public override string ToString() => $"offset = {offset}," + $"arrowXOffsetFromCenter={arrowXOffsetFromCenter}";
}
class _ToolbarRenderBox : RenderShiftedBox {
public _ToolbarRenderBox(
float _barTopY = 0.0f,
float _arrowTipX = 0.0f,
bool _isArrowPointingDown = false,
RenderBox child = null
) : base(child) {
this._barTopY = _barTopY;
this._arrowTipX = _arrowTipX;
this._isArrowPointingDown = _isArrowPointingDown;
}
public override bool isRepaintBoundary {
get { return true; }
}
float _barTopY;
public float barTopY {
set {
if (_barTopY == value) {
return;
}
_barTopY = value;
markNeedsLayout();
//markNeedsSemanticsUpdate();
}
}
float _arrowTipX;
public float arrowTipX {
set {
if (_arrowTipX == value) {
return;
}
_arrowTipX = value;
markNeedsLayout();
//markNeedsSemanticsUpdate();
}
}
bool _isArrowPointingDown;
public bool isArrowPointingDown {
set {
if (_isArrowPointingDown == value) {
return;
}
_isArrowPointingDown = value;
markNeedsLayout();
//markNeedsSemanticsUpdate();
}
}
public readonly BoxConstraints heightConstraint = BoxConstraints.tightFor(height: CupertinoTextSelectionUtils._kToolbarHeight);
public override void setupParentData(RenderObject child) {
if (!(child.parentData is _ToolbarParentData)) {
child.parentData = new _ToolbarParentData();
}
}
protected override void performLayout() {
BoxConstraints constraints = this.constraints;
size = constraints.biggest;
if (child == null) {
return;
}
BoxConstraints enforcedConstraint = constraints
.deflate( EdgeInsets.symmetric(horizontal: CupertinoTextSelectionUtils._kToolbarScreenPadding))
.loosen();
child.layout(heightConstraint.enforce(enforcedConstraint), parentUsesSize: true);
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
// The local x-coordinate of the center of the toolbar.
float lowerBound = child.size.width/2 + CupertinoTextSelectionUtils._kToolbarScreenPadding;
float upperBound = size.width - child.size.width/2 - CupertinoTextSelectionUtils._kToolbarScreenPadding;
float adjustedCenterX = _arrowTipX.clamp(lowerBound, upperBound) ;
childParentData.offset = new Offset(adjustedCenterX - child.size.width / 2, _barTopY);
childParentData.arrowXOffsetFromCenter = _arrowTipX - adjustedCenterX;
}
Path _clipPath() {
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
Path rrect = new Path();
rrect.addRRect(
RRect.fromRectAndRadius(
new Offset(0, _isArrowPointingDown ? 0 : CupertinoTextSelectionUtils._kToolbarArrowSize.height)
& new Size(child.size.width, child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height),
CupertinoTextSelectionUtils._kToolbarBorderRadius
));
float arrowTipX = child.size.width / 2 + childParentData.arrowXOffsetFromCenter;
float arrowBottomY = _isArrowPointingDown
? child.size.height - CupertinoTextSelectionUtils._kToolbarArrowSize.height
: CupertinoTextSelectionUtils._kToolbarArrowSize.height;
float arrowTipY = _isArrowPointingDown ? child.size.height : 0;
Path arrow = new Path();
arrow.moveTo(arrowTipX, arrowTipY);
arrow.lineTo(arrowTipX - CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
arrow.lineTo(arrowTipX + CupertinoTextSelectionUtils._kToolbarArrowSize.width / 2, arrowBottomY);
arrow.close();
return Path.combine(PathOperation.union, rrect, arrow);
}
public override void paint(PaintingContext context, Offset offset) {
if (child == null) {
return;
}
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
context.pushClipPath(
needsCompositing,
offset + childParentData.offset,
Offset.zero & child.size,
_clipPath(),
(PaintingContext innerContext, Offset innerOffset) => innerContext.paintChild(child, innerOffset),
);
}
Paint _debugPaint;
protected override void debugPaintSize(PaintingContext context, Offset offset) {
D.assert(() => {
if (child == null) {
return true;
}
//_debugPaint ??= new Paint()
if (_debugPaint == null) {
_debugPaint = new Paint();
}
_debugPaint.shader = ui.Gradient.linear(
new Offset(0.0f, 0.0f),
new Offset(10.0f, 10.0f),
new List<Color> {
new Color(0x00000000), new Color(0xFFFF00FF), new Color(0xFFFF00FF),
new Color(0x00000000)
},
new List<float> {0.25f, 0.25f, 0.75f, 0.75f},
TileMode.repeated
);
_debugPaint.strokeWidth = 2.0f;
_debugPaint.style = PaintingStyle.stroke;
_ToolbarParentData childParentData = child.parentData as _ToolbarParentData;
context.canvas.drawPath(_clipPath().shift(offset + childParentData.offset), _debugPaint);
return true;
});
}
}
/// Draws a single text selection handle with a bar and a ball.
public class _TextSelectionHandlePainter : CustomPainter {
public _TextSelectionHandlePainter(Color color) {
this.color = color;
}
public readonly Color color;
public override void paint(Canvas canvas, Size size) {
float halfStrokeWidth = 1.0f;
Paint paint = new Paint();
paint.color = color;
Rect circle = Rect.fromCircle(
center: new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius, CupertinoTextSelectionUtils._kSelectionHandleRadius),
radius: CupertinoTextSelectionUtils._kSelectionHandleRadius
);
Rect line = Rect.fromPoints(
new Offset(
CupertinoTextSelectionUtils._kSelectionHandleRadius - halfStrokeWidth,
2 * CupertinoTextSelectionUtils._kSelectionHandleRadius - CupertinoTextSelectionUtils._kSelectionHandleOverlap
),
new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius + halfStrokeWidth, size.height)
);
Path path = new Path();
path.addOval(circle);
// Draw line so it slightly overlaps the circle.
path.addRect(line);
canvas.drawPath(path, paint);
}
public override bool shouldRepaint(CustomPainter oldPainter) {
oldPainter = (_TextSelectionHandlePainter)oldPainter;
return color != ((_TextSelectionHandlePainter)oldPainter).color;
}
}
class _CupertinoTextSelectionControls : TextSelectionControls {
/// Returns the size of the Cupertino handle.
public override Size getHandleSize(float textLineHeight) {
return new Size(
CupertinoTextSelectionUtils._kSelectionHandleRadius * 2,
textLineHeight + CupertinoTextSelectionUtils._kSelectionHandleRadius * 2 - CupertinoTextSelectionUtils._kSelectionHandleOverlap
);
}
public new Widget buildToolbar(
BuildContext context,
Rect globalEditableRegion,
float textLineHeight,
Offset position,
List<TextSelectionPoint> endpoints
//TextSelectionDelegate delegate
)
{
D.assert(debugCheckHasMediaQuery(context));
MediaQueryData mediaQuery = MediaQuery.of(context);
float toolbarHeightNeeded = mediaQuery.padding.top
+ CupertinoTextSelectionUtils._kToolbarScreenPadding
+ CupertinoTextSelectionUtils._kToolbarHeight
+ CupertinoTextSelectionUtils._kToolbarContentDistance;
float availableHeight = globalEditableRegion.top + endpoints.first().point.dy - textLineHeight;
bool isArrowPointingDown = toolbarHeightNeeded <= availableHeight;
float arrowTipX = (position.dx + globalEditableRegion.left).clamp(
CupertinoTextSelectionUtils._kArrowScreenPadding + mediaQuery.padding.left,
mediaQuery.size.width - mediaQuery.padding.right - CupertinoTextSelectionUtils._kArrowScreenPadding
) ;
float localBarTopY = isArrowPointingDown
? endpoints.first().point.dy - textLineHeight - CupertinoTextSelectionUtils._kToolbarContentDistance - CupertinoTextSelectionUtils._kToolbarHeight
: endpoints.last().point.dy + CupertinoTextSelectionUtils._kToolbarContentDistance;
List<Widget> items = new List<Widget>{};
Widget onePhysicalPixelVerticalDivider =
new SizedBox(width: 1.0f / MediaQuery.of(context).devicePixelRatio);
CupertinoLocalizations localizations = CupertinoLocalizations.of(context);
EdgeInsets arrowPadding = isArrowPointingDown
? EdgeInsets.only(bottom: CupertinoTextSelectionUtils._kToolbarArrowSize.height)
: EdgeInsets.only(top: CupertinoTextSelectionUtils._kToolbarArrowSize.height);
void addToolbarButtonIfNeeded(
string text,
bool Function(TextSelectionDelegate) predicate,
void Function(TextSelectionDelegate) onPressed) {
if (!predicate(delegate)) {
return;
}
if (items.isNotEmpty()) {
items.Add(onePhysicalPixelVerticalDivider);
}
items.Add(new CupertinoButton(
child: new Text(text, style:CupertinoTextSelectionUtils. _kToolbarButtonFontStyle),
color: CupertinoTextSelectionUtils._kToolbarBackgroundColor,
minSize: CupertinoTextSelectionUtils._kToolbarHeight,
padding: CupertinoTextSelectionUtils._kToolbarButtonPadding.add(arrowPadding),
borderRadius: null,
pressedOpacity: 0.7f,
onPressed: () => onPressed(delegate)
));
}
addToolbarButtonIfNeeded(localizations.cutButtonLabel, canCut, handleCut);
addToolbarButtonIfNeeded(localizations.copyButtonLabel, canCopy, handleCopy);
addToolbarButtonIfNeeded(localizations.pasteButtonLabel, canPaste, handlePaste);
addToolbarButtonIfNeeded(localizations.selectAllButtonLabel, canSelectAll, handleSelectAll);
return new CupertinoTextSelectionToolbar(
barTopY: localBarTopY + globalEditableRegion.top,
arrowTipX: arrowTipX,
isArrowPointingDown: isArrowPointingDown,
child: items.isEmpty() ? null : new DecoratedBox(
decoration: new BoxDecoration(color: CupertinoTextSelectionUtils._kToolbarDividerColor),
child: new Row(mainAxisSize: MainAxisSize.min, children: items)
)
);
}
public override Widget buildHandle(BuildContext context, TextSelectionHandleType type, float textLineHeight) {
Size desiredSize = getHandleSize(textLineHeight);
Widget handle = SizedBox.fromSize(
size: desiredSize,
child: new CustomPaint(
painter: new _TextSelectionHandlePainter(CupertinoTheme.of(context).primaryColor)
)
);
switch (type) {
case TextSelectionHandleType.left:
return handle;
case TextSelectionHandleType.right:
// Right handle is a vertical mirror of the left.
return new Transform(
transform: Matrix4.identity()
..translate(desiredSize.width / 2, desiredSize.height / 2)
..rotateZ(math.pi)
..translate(-desiredSize.width / 2, -desiredSize.height / 2),
child: handle
);
// iOS doesn't draw anything for collapsed selections.
case TextSelectionHandleType.collapsed:
return new SizedBox();
}
D.assert(type != null);
return null;
}
public override Offset getHandleAnchor(TextSelectionHandleType type, float textLineHeight) {
Size handleSize = getHandleSize(textLineHeight);
switch (type) {
// The circle is at the top for the left handle, and the anchor point is
// all the way at the bottom of the line.
case TextSelectionHandleType.left:
return new Offset(
handleSize.width / 2,
handleSize.height
);
// The right handle is vertically flipped, and the anchor point is near
// the top of the circle to give slight overlap.
case TextSelectionHandleType.right:
return new Offset(
handleSize.width / 2,
handleSize.height - 2 * CupertinoTextSelectionUtils._kSelectionHandleRadius + CupertinoTextSelectionUtils._kSelectionHandleOverlap
);
// A collapsed handle anchors itself so that it's centered.
default:
return new Offset(
handleSize.width / 2,
textLineHeight + (handleSize.height - textLineHeight) / 2
);
}
}
}*/
/// Text selection controls that follows iOS design conventions.
class _TextSelectionToolbarNotchPainter : AbstractCustomPainter {
public override void paint(Canvas canvas, Size size) {
Paint paint = new Paint();
paint.color = CupertinoTextSelectionUtils._kToolbarBackgroundColor;
paint.style = PaintingStyle.fill;
Path triangle = new Path();
triangle.lineTo(CupertinoTextSelectionUtils._kToolbarTriangleSize.width / 2, 0.0f);
triangle.lineTo(0.0f, CupertinoTextSelectionUtils._kToolbarTriangleSize.height);
triangle.lineTo(-(CupertinoTextSelectionUtils._kToolbarTriangleSize.width / 2), 0.0f);
triangle.close();
canvas.drawPath(triangle, paint);
}
public override bool shouldRepaint(CustomPainter oldPainter) {
return false;
}
}
class _TextSelectionToolbar : StatelessWidget {
public _TextSelectionToolbar(
Key key = null,
VoidCallback handleCut = null,
VoidCallback handleCopy = null,
VoidCallback handlePaste = null,
VoidCallback handleSelectAll = null
) : base(key: key) {
this.handleCut = handleCut;
this.handleCopy = handleCopy;
this.handlePaste = handlePaste;
this.handleSelectAll = handleSelectAll;
}
readonly VoidCallback handleCut;
readonly VoidCallback handleCopy;
readonly VoidCallback handlePaste;
readonly VoidCallback handleSelectAll;
public override Widget build(BuildContext context) {
List<Widget> items = new List<Widget>();
Widget onePhysicalPixelVerticalDivider =
new SizedBox(width: 1.0f / MediaQuery.of(context).devicePixelRatio);
CupertinoLocalizations localizations = CupertinoLocalizations.of(context);
if (handleCut != null) {
items.Add(_buildToolbarButton(localizations.cutButtonLabel, handleCut));
}
if (handleCopy != null) {
if (items.isNotEmpty()) {
items.Add(onePhysicalPixelVerticalDivider);
}
items.Add(_buildToolbarButton(localizations.copyButtonLabel, handleCopy));
}
if (handlePaste != null) {
if (items.isNotEmpty()) {
items.Add(onePhysicalPixelVerticalDivider);
}
items.Add(_buildToolbarButton(localizations.pasteButtonLabel, handlePaste));
}
if (handleSelectAll != null) {
if (items.isNotEmpty()) {
items.Add(onePhysicalPixelVerticalDivider);
}
items.Add(_buildToolbarButton(localizations.selectAllButtonLabel, handleSelectAll));
}
Widget triangle = SizedBox.fromSize(
size: CupertinoTextSelectionUtils._kToolbarTriangleSize,
child: new CustomPaint(
painter: new _TextSelectionToolbarNotchPainter()
)
);
return new Column(
mainAxisSize: MainAxisSize.min,
children: new List<Widget> {
new ClipRRect(
borderRadius: CupertinoTextSelectionUtils._kToolbarBorderRadius,
child: new DecoratedBox(
decoration: new BoxDecoration(
color: CupertinoTextSelectionUtils._kToolbarDividerColor,
borderRadius: CupertinoTextSelectionUtils._kToolbarBorderRadius,
border: Border.all(color: CupertinoTextSelectionUtils._kToolbarBackgroundColor,
width: 0)
),
child: new Row(mainAxisSize: MainAxisSize.min, children: items)
)
),
triangle,
new Padding(padding: EdgeInsets.only(bottom: 10.0f))
}
);
}
CupertinoButton _buildToolbarButton(string text, VoidCallback onPressed) {
return new CupertinoButton(
child: new Text(text, style: CupertinoTextSelectionUtils._kToolbarButtonFontStyle),
color: CupertinoTextSelectionUtils._kToolbarBackgroundColor,
minSize: CupertinoTextSelectionUtils._kToolbarHeight,
padding: CupertinoTextSelectionUtils._kToolbarButtonPadding,
borderRadius: null,
pressedOpacity: 0.7f,
onPressed: onPressed
);
}
}
class _TextSelectionToolbarLayout : SingleChildLayoutDelegate {
public _TextSelectionToolbarLayout(
Size screenSize,
Rect globalEditableRegion,
Offset position) {
this.screenSize = screenSize;
this.globalEditableRegion = globalEditableRegion;
this.position = position;
}
readonly Size screenSize;
readonly Rect globalEditableRegion;
readonly Offset position;
public override BoxConstraints getConstraintsForChild(BoxConstraints constraints) {
return constraints.loosen();
}
public override Offset getPositionForChild(Size size, Size childSize) {
Offset globalPosition = globalEditableRegion.topLeft + position;
float x = globalPosition.dx - childSize.width / 2.0f;
float y = globalPosition.dy - childSize.height;
if (x < CupertinoTextSelectionUtils._kToolbarScreenPadding) {
x = CupertinoTextSelectionUtils._kToolbarScreenPadding;
}
else if (x + childSize.width > screenSize.width - CupertinoTextSelectionUtils._kToolbarScreenPadding) {
x = screenSize.width - childSize.width - CupertinoTextSelectionUtils._kToolbarScreenPadding;
}
if (y < CupertinoTextSelectionUtils._kToolbarScreenPadding) {
y = CupertinoTextSelectionUtils._kToolbarScreenPadding;
}
else if (y + childSize.height >
screenSize.height - CupertinoTextSelectionUtils._kToolbarScreenPadding) {
y = screenSize.height - childSize.height - CupertinoTextSelectionUtils._kToolbarScreenPadding;
}
return new Offset(x, y);
}
public override bool shouldRelayout(SingleChildLayoutDelegate oldDelegate) {
_TextSelectionToolbarLayout _oldDelegate = (_TextSelectionToolbarLayout) oldDelegate;
return screenSize != _oldDelegate.screenSize
|| globalEditableRegion != _oldDelegate.globalEditableRegion
|| position != _oldDelegate.position;
}
}
class _TextSelectionHandlePainter : AbstractCustomPainter {
public _TextSelectionHandlePainter(Offset origin) {
this.origin = origin;
}
readonly Offset origin;
public override void paint(Canvas canvas, Size size) {
Paint paint = new Paint();
paint.color = CupertinoTextSelectionUtils._kHandlesColor;
paint.strokeWidth = 2.0f;
canvas.drawCircle(origin.translate(0.0f, 4.0f), 5.5f, paint);
canvas.drawLine(
origin,
origin.translate(
0.0f,
-(size.height - 2.0f * CupertinoTextSelectionUtils._kHandlesPadding)
),
paint
);
}
public override bool shouldRepaint(CustomPainter oldPainter) {
_TextSelectionHandlePainter _oldPainter = (_TextSelectionHandlePainter) oldPainter;
return origin != _oldPainter.origin;
}
}
class _CupertinoTextSelectionControls : TextSelectionControls {
public override Size getHandleSize(float textLineHeight) {
return new Size(
CupertinoTextSelectionUtils._kSelectionHandleRadius * 2,
textLineHeight + CupertinoTextSelectionUtils._kSelectionHandleRadius * 2 -
CupertinoTextSelectionUtils._kSelectionHandleOverlap
);
}
public override Size handleSize {
get { return CupertinoTextSelectionUtils._kSelectionOffset; }
}
public override Offset getHandleAnchor(TextSelectionHandleType type, float textLineHeight) {
Size handleSize = getHandleSize(textLineHeight);
switch (type) {
case TextSelectionHandleType.left:
return new Offset(
handleSize.width / 2,
handleSize.height
);
case TextSelectionHandleType.right:
return new Offset(
handleSize.width / 2,
handleSize.height - 2 * CupertinoTextSelectionUtils._kSelectionHandleRadius + CupertinoTextSelectionUtils._kSelectionHandleOverlap
);
default:
return new Offset(
handleSize.width / 2,
textLineHeight + (handleSize.height - textLineHeight) / 2
);
}
}
public override Widget buildToolbar(
BuildContext context,
Rect globalEditableRegion,
float textLineHeight,
Offset position,
List<TextSelectionPoint> endpoints,
TextSelectionDelegate del) {
D.assert(WidgetsD.debugCheckHasMediaQuery(context));
return new ConstrainedBox(
constraints: BoxConstraints.tight(globalEditableRegion.size),
child: new CustomSingleChildLayout(
layoutDelegate: new _TextSelectionToolbarLayout(
MediaQuery.of(context).size,
globalEditableRegion,
position
),
child: new _TextSelectionToolbar(
handleCut: canCut(del) ? () => handleCut(del) : (VoidCallback) null,
handleCopy: canCopy(del) ? () => handleCopy(del) : (VoidCallback) null,
handlePaste: canPaste(del) ? () => handlePaste(del) : (VoidCallback) null,
handleSelectAll: canSelectAll(del) ? () => handleSelectAll(del) : (VoidCallback) null
)
)
);
}
public override Widget buildHandle(BuildContext context, TextSelectionHandleType type, float textLineHeight) {
Size desiredSize = new Size(
2.0f * CupertinoTextSelectionUtils._kHandlesPadding,
textLineHeight + 2.0f * CupertinoTextSelectionUtils._kHandlesPadding
);
Widget handle = SizedBox.fromSize(
size: desiredSize,
child: new CustomPaint(
painter: new _TextSelectionHandlePainter(
origin: new Offset(CupertinoTextSelectionUtils._kHandlesPadding,
textLineHeight + CupertinoTextSelectionUtils._kHandlesPadding)
)
)
);
switch (type) {
case TextSelectionHandleType.left:
Matrix4 matrix = Matrix4.rotationZ(Mathf.PI);
matrix.translate(-CupertinoTextSelectionUtils._kHandlesPadding,
-CupertinoTextSelectionUtils._kHandlesPadding);
return new Transform(
transform: matrix,
child: handle
);
case TextSelectionHandleType.right:
return new Transform(
transform:Matrix4.translationValues(
-CupertinoTextSelectionUtils._kHandlesPadding,
-(textLineHeight + CupertinoTextSelectionUtils._kHandlesPadding),
0
),
child: handle
);
case TextSelectionHandleType.collapsed:
return new Container();
}
return null;
}
}
}