您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符
 
 
 
 
 
 

316 行
12 KiB

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 _kHandlesPadding = 18.0f;
public const float _kToolbarScreenPadding = 8.0f;
public const float _kToolbarHeight = 36.0f;
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: -0.11f,
fontWeight: FontWeight.w300,
color: CupertinoColors.white
);
}
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 handleSize {
get { return CupertinoTextSelectionUtils._kSelectionOffset; }
}
public override Widget buildToolbar(BuildContext context, Rect globalEditableRegion, Offset position,
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 = new Matrix4().rotationZ(Mathf.PI);
matrix.translate(-CupertinoTextSelectionUtils._kHandlesPadding,
-CupertinoTextSelectionUtils._kHandlesPadding);
return new Transform(
transform: matrix,
child: handle
);
case TextSelectionHandleType.right:
return new Transform(
transform:new Matrix4().translationValues(
-CupertinoTextSelectionUtils._kHandlesPadding,
-(textLineHeight + CupertinoTextSelectionUtils._kHandlesPadding),
0
),
child: handle
);
case TextSelectionHandleType.collapsed:
return new Container();
}
return null;
}
}
}