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fix Selection handles position is off (#34665)

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This commit is contained in:
chunhtai
2019-07-03 10:50:10 -07:00
committed by GitHub
parent b8597f0a7e
commit f143fd6a4f
5 changed files with 236 additions and 56 deletions
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58
packages/flutter/lib/src/rendering/editable.dart
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@@ -11,6 +11,7 @@ import 'package:flutter/semantics.dart';
import 'package:flutter/services.dart';
import 'box.dart';
import 'layer.dart';
import 'object.dart';
import 'viewport_offset.dart';
@@ -143,6 +144,8 @@ class RenderEditable extends RenderBox {
Color backgroundCursorColor,
ValueNotifier<bool> showCursor,
bool hasFocus,
@required LayerLink startHandleLayerLink,
@required LayerLink endHandleLayerLink,
int maxLines = 1,
int minLines,
bool expands = false,
@@ -168,6 +171,8 @@ class RenderEditable extends RenderBox {
assert(textDirection != null, 'RenderEditable created without a textDirection.'),
assert(maxLines == null || maxLines > 0),
assert(minLines == null || minLines > 0),
assert(startHandleLayerLink != null),
assert(endHandleLayerLink != null),
assert(
(maxLines == null) || (minLines == null) || (maxLines >= minLines),
'minLines can\'t be greater than maxLines',
@@ -209,6 +214,8 @@ class RenderEditable extends RenderBox {
_floatingCursorAddedMargin = floatingCursorAddedMargin,
_enableInteractiveSelection = enableInteractiveSelection,
_devicePixelRatio = devicePixelRatio,
_startHandleLayerLink = startHandleLayerLink,
_endHandleLayerLink = endHandleLayerLink,
_obscureText = obscureText {
assert(_showCursor != null);
assert(!_showCursor.value || cursorColor != null);
@@ -903,6 +910,32 @@ class RenderEditable extends RenderBox {
markNeedsPaint();
}
/// The [LayerLink] of start selection handle.
///
/// [RenderEditable] is responsible for calculating the [Offset] of this
/// [LayerLink], which will be used as [CompositedTransformTarget] of start handle.
LayerLink get startHandleLayerLink => _startHandleLayerLink;
LayerLink _startHandleLayerLink;
set startHandleLayerLink(LayerLink value) {
if (_startHandleLayerLink == value)
return;
_startHandleLayerLink = value;
markNeedsPaint();
}
/// The [LayerLink] of end selection handle.
///
/// [RenderEditable] is responsible for calculating the [Offset] of this
/// [LayerLink], which will be used as [CompositedTransformTarget] of end handle.
LayerLink get endHandleLayerLink => _endHandleLayerLink;
LayerLink _endHandleLayerLink;
set endHandleLayerLink(LayerLink value) {
if (_endHandleLayerLink == value)
return;
_endHandleLayerLink = value;
markNeedsPaint();
}
/// The padding applied to text field. Used to determine the bounds when
/// moving the floating cursor.
///
@@ -1765,6 +1798,30 @@ class RenderEditable extends RenderBox {
}
}
void _paintHandleLayers(PaintingContext context, List<TextSelectionPoint> endpoints) {
Offset startPoint = endpoints[0].point;
startPoint = Offset(
startPoint.dx.clamp(0.0, size.width),
startPoint.dy.clamp(0.0, size.height),
);
context.pushLayer(
LeaderLayer(link: startHandleLayerLink, offset: startPoint),
super.paint,
Offset.zero,
);
if (endpoints.length == 2) {
Offset endPoint = endpoints[1].point;
endPoint = Offset(
endPoint.dx.clamp(0.0, size.width),
endPoint.dy.clamp(0.0, size.height),
);
context.pushLayer(
LeaderLayer(link: endHandleLayerLink, offset: endPoint),
super.paint,
Offset.zero,
);
}
}
@override
void paint(PaintingContext context, Offset offset) {
_layoutText(constraints.maxWidth);
@@ -1772,6 +1829,7 @@ class RenderEditable extends RenderBox {
context.pushClipRect(needsCompositing, offset, Offset.zero & size, _paintContents);
else
_paintContents(context, offset);
_paintHandleLayers(context, getEndpointsForSelection(selection));
}
@override

21
packages/flutter/lib/src/widgets/editable_text.dart
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@@ -848,7 +848,10 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
AnimationController _cursorBlinkOpacityController;
final LayerLink _layerLink = LayerLink();
final LayerLink _toolbarLayerLink = LayerLink();
final LayerLink _startHandleLayerLink = LayerLink();
final LayerLink _endHandleLayerLink = LayerLink();
bool _didAutoFocus = false;
FocusAttachment _focusAttachment;
@@ -1226,7 +1229,9 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
context: context,
value: _value,
debugRequiredFor: widget,
layerLink: _layerLink,
toolbarLayerLink: _toolbarLayerLink,
startHandleLayerLink: _startHandleLayerLink,
endHandleLayerLink: _endHandleLayerLink,
renderObject: renderObject,
selectionControls: widget.selectionControls,
selectionDelegate: this,
@@ -1541,13 +1546,15 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
dragStartBehavior: widget.dragStartBehavior,
viewportBuilder: (BuildContext context, ViewportOffset offset) {
return CompositedTransformTarget(
link: _layerLink,
link: _toolbarLayerLink,
child: Semantics(
onCopy: _semanticsOnCopy(controls),
onCut: _semanticsOnCut(controls),
onPaste: _semanticsOnPaste(controls),
child: _Editable(
key: _editableKey,
startHandleLayerLink: _startHandleLayerLink,
endHandleLayerLink: _endHandleLayerLink,
textSpan: buildTextSpan(),
value: _value,
cursorColor: _cursorColor,
@@ -1624,6 +1631,8 @@ class _Editable extends LeafRenderObjectWidget {
Key key,
this.textSpan,
this.value,
this.startHandleLayerLink,
this.endHandleLayerLink,
this.cursorColor,
this.backgroundCursorColor,
this.showCursor,
@@ -1657,6 +1666,8 @@ class _Editable extends LeafRenderObjectWidget {
final TextSpan textSpan;
final TextEditingValue value;
final Color cursorColor;
final LayerLink startHandleLayerLink;
final LayerLink endHandleLayerLink;
final Color backgroundCursorColor;
final ValueNotifier<bool> showCursor;
final bool hasFocus;
@@ -1688,6 +1699,8 @@ class _Editable extends LeafRenderObjectWidget {
return RenderEditable(
text: textSpan,
cursorColor: cursorColor,
startHandleLayerLink: startHandleLayerLink,
endHandleLayerLink: endHandleLayerLink,
backgroundCursorColor: backgroundCursorColor,
showCursor: showCursor,
hasFocus: hasFocus,
@@ -1721,6 +1734,8 @@ class _Editable extends LeafRenderObjectWidget {
renderObject
..text = textSpan
..cursorColor = cursorColor
..startHandleLayerLink = startHandleLayerLink
..endHandleLayerLink = endHandleLayerLink
..showCursor = showCursor
..hasFocus = hasFocus
..maxLines = maxLines

69
packages/flutter/lib/src/widgets/text_selection.dart
View File

@@ -269,7 +269,9 @@ class TextSelectionOverlay {
@required TextEditingValue value,
@required this.context,
this.debugRequiredFor,
@required this.layerLink,
@required this.toolbarLayerLink,
@required this.startHandleLayerLink,
@required this.endHandleLayerLink,
@required this.renderObject,
this.selectionControls,
bool handlesVisible = false,
@@ -300,7 +302,15 @@ class TextSelectionOverlay {
/// The object supplied to the [CompositedTransformTarget] that wraps the text
/// field.
final LayerLink layerLink;
final LayerLink toolbarLayerLink;
/// The objects supplied to the [CompositedTransformTarget] that wraps the
/// location of start selection handle.
final LayerLink startHandleLayerLink;
/// The objects supplied to the [CompositedTransformTarget] that wraps the
/// location of end selection handle.
final LayerLink endHandleLayerLink;
// TODO(mpcomplete): what if the renderObject is removed or replaced, or
// moves? Not sure what cases I need to handle, or how to handle them.
@@ -499,7 +509,8 @@ class TextSelectionOverlay {
child: _TextSelectionHandleOverlay(
onSelectionHandleChanged: (TextSelection newSelection) { _handleSelectionHandleChanged(newSelection, position); },
onSelectionHandleTapped: onSelectionHandleTapped,
layerLink: layerLink,
startHandleLayerLink: startHandleLayerLink,
endHandleLayerLink: endHandleLayerLink,
renderObject: renderObject,
selection: _selection,
selectionControls: selectionControls,
@@ -539,7 +550,7 @@ class TextSelectionOverlay {
return FadeTransition(
opacity: _toolbarOpacity,
child: CompositedTransformFollower(
link: layerLink,
link: toolbarLayerLink,
showWhenUnlinked: false,
offset: -editingRegion.topLeft,
child: selectionControls.buildToolbar(
@@ -575,7 +586,8 @@ class _TextSelectionHandleOverlay extends StatefulWidget {
Key key,
@required this.selection,
@required this.position,
@required this.layerLink,
@required this.startHandleLayerLink,
@required this.endHandleLayerLink,
@required this.renderObject,
@required this.onSelectionHandleChanged,
@required this.onSelectionHandleTapped,
@@ -585,7 +597,8 @@ class _TextSelectionHandleOverlay extends StatefulWidget {
final TextSelection selection;
final _TextSelectionHandlePosition position;
final LayerLink layerLink;
final LayerLink startHandleLayerLink;
final LayerLink endHandleLayerLink;
final RenderEditable renderObject;
final ValueChanged<TextSelection> onSelectionHandleChanged;
final VoidCallback onSelectionHandleTapped;
@@ -696,30 +709,30 @@ class _TextSelectionHandleOverlayState
@override
Widget build(BuildContext context) {
final List<TextSelectionPoint> endpoints = widget.renderObject.getEndpointsForSelection(widget.selection);
Offset point;
LayerLink layerLink;
TextSelectionHandleType type;
switch (widget.position) {
case _TextSelectionHandlePosition.start:
point = endpoints[0].point;
type = _chooseType(endpoints[0], TextSelectionHandleType.left, TextSelectionHandleType.right);
layerLink = widget.startHandleLayerLink;
type = _chooseType(
widget.renderObject.textDirection,
TextSelectionHandleType.left,
TextSelectionHandleType.right,
);
break;
case _TextSelectionHandlePosition.end:
// [endpoints] will only contain 1 point for collapsed selections, in
// which case we shouldn't be building the [end] handle.
assert(endpoints.length == 2);
point = endpoints[1].point;
type = _chooseType(endpoints[1], TextSelectionHandleType.right, TextSelectionHandleType.left);
// For collapsed selections, we shouldn't be building the [end] handle.
assert(!widget.selection.isCollapsed);
layerLink = widget.endHandleLayerLink;
type = _chooseType(
widget.renderObject.textDirection,
TextSelectionHandleType.right,
TextSelectionHandleType.left,
);
break;
}
final Size viewport = widget.renderObject.size;
point = Offset(
point.dx.clamp(0.0, viewport.width),
point.dy.clamp(0.0, viewport.height),
);
final Offset handleAnchor = widget.selectionControls.getHandleAnchor(
type,
widget.renderObject.preferredLineHeight,
@@ -727,10 +740,10 @@ class _TextSelectionHandleOverlayState
final Size handleSize = widget.selectionControls.getHandleSize(
widget.renderObject.preferredLineHeight,
);
final Rect handleRect = Rect.fromLTWH(
// Put handleAnchor on top of point
point.dx - handleAnchor.dx,
point.dy - handleAnchor.dy,
-handleAnchor.dx,
-handleAnchor.dy,
handleSize.width,
handleSize.height,
);
@@ -747,7 +760,7 @@ class _TextSelectionHandleOverlayState
);
return CompositedTransformFollower(
link: widget.layerLink,
link: layerLink,
offset: interactiveRect.topLeft,
showWhenUnlinked: false,
child: FadeTransition(
@@ -782,15 +795,15 @@ class _TextSelectionHandleOverlayState
}
TextSelectionHandleType _chooseType(
TextSelectionPoint endpoint,
TextDirection textDirection,
TextSelectionHandleType ltrType,
TextSelectionHandleType rtlType,
) {
if (widget.selection.isCollapsed)
return TextSelectionHandleType.collapsed;
assert(endpoint.direction != null);
switch (endpoint.direction) {
assert(textDirection != null);
switch (textDirection) {
case TextDirection.ltr:
return ltrType;
case TextDirection.rtl:

28
packages/flutter/test/rendering/editable_test.dart
View File

@@ -34,6 +34,8 @@ void main() {
style: TextStyle(height: 1.0, fontSize: 10.0, fontFamily: 'Ahem'),
text: '12345',
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
textAlign: TextAlign.start,
textDirection: TextDirection.ltr,
locale: const Locale('ja', 'JP'),
@@ -84,11 +86,16 @@ void main() {
style: TextStyle(height: 1.0, fontSize: 10.0, fontFamily: 'Ahem'),
text: 'A',
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
textAlign: TextAlign.start,
textDirection: TextDirection.ltr,
locale: const Locale('en', 'US'),
offset: ViewportOffset.fixed(10.0),
textSelectionDelegate: delegate,
selection: const TextSelection.collapsed(
offset: 0,
),
);
editable.layout(BoxConstraints.loose(const Size(1000.0, 1000.0)));
expect(
@@ -114,6 +121,8 @@ void main() {
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
selection: const TextSelection.collapsed(
offset: 4,
affinity: TextAffinity.upstream,
@@ -187,6 +196,8 @@ void main() {
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
selection: const TextSelection.collapsed(
offset: 4,
affinity: TextAffinity.upstream,
@@ -258,6 +269,8 @@ void main() {
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
selection: const TextSelection(
baseOffset: 0,
extentOffset: 3,
@@ -297,6 +310,8 @@ void main() {
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
selection: const TextSelection.collapsed(
offset: 2,
affinity: TextAffinity.upstream,
@@ -345,12 +360,17 @@ void main() {
onSelectionChanged: (TextSelection selection, RenderEditable renderObject, SelectionChangedCause cause) {
currentSelection = selection;
},
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
text: const TextSpan(
text: 'test\ntest',
style: TextStyle(
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
selection: const TextSelection.collapsed(
offset: 4,
),
);
layout(editable);
@@ -429,6 +449,8 @@ void main() {
height: 1.0, fontSize: 10.0, fontFamily: 'Ahem',
),
),
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
);
layout(editable);
@@ -461,6 +483,8 @@ void main() {
selectionChangedCount++;
updatedSelection = selection;
},
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
text: text,
);
@@ -483,6 +507,8 @@ void main() {
updatedSelection = selection;
},
text: text,
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
);
layout(editable2);
@@ -510,6 +536,8 @@ void main() {
offset: ViewportOffset.zero(),
textSelectionDelegate: delegate,
hasFocus: true,
startHandleLayerLink: LayerLink(),
endHandleLayerLink: LayerLink(),
);
expect(editable.hasFocus, true);

116
packages/flutter/test/widgets/editable_text_test.dart
View File

@@ -268,6 +268,66 @@ void main() {
equals('TextInputAction.newline'));
});
testWidgets('selection overlay will update when text grow bigger', (WidgetTester tester) async {
final TextEditingController controller = TextEditingController.fromValue(
const TextEditingValue(
text: 'initial value',
)
);
Future<void> pumpEditableTextWithTextStyle(TextStyle style) async {
await tester.pumpWidget(
MaterialApp(
home: EditableText(
backgroundCursorColor: Colors.grey,
controller: controller,
focusNode: focusNode,
style: style,
cursorColor: cursorColor,
selectionControls: materialTextSelectionControls,
showSelectionHandles: true,
),
),
);
}
await pumpEditableTextWithTextStyle(const TextStyle(fontSize: 18));
final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
state.renderEditable.selectWordsInRange(
from: const Offset(0, 0),
cause: SelectionChangedCause.longPress,
);
await tester.pumpAndSettle();
await tester.idle();
List<RenderBox> handles = List<RenderBox>.from(
tester.renderObjectList<RenderBox>(
find.descendant(
of: find.byType(CompositedTransformFollower),
matching: find.byType(GestureDetector),
),
),
);
expect(handles[0].localToGlobal(Offset.zero), const Offset(-35.0, 5.0));
expect(handles[1].localToGlobal(Offset.zero), const Offset(113.0, 5.0));
await pumpEditableTextWithTextStyle(const TextStyle(fontSize: 30));
await tester.pumpAndSettle();
// Handles should be updated with bigger font size.
handles = List<RenderBox>.from(
tester.renderObjectList<RenderBox>(
find.descendant(
of: find.byType(CompositedTransformFollower),
matching: find.byType(GestureDetector),
),
),
);
// First handle should have the same dx but bigger dy.
expect(handles[0].localToGlobal(Offset.zero), const Offset(-35.0, 17.0));
expect(handles[1].localToGlobal(Offset.zero), const Offset(197.0, 17.0));
});
testWidgets('Multiline keyboard with newline action is requested when maxLines = null', (WidgetTester tester) async {
await tester.pumpWidget(
MediaQuery(
@@ -1908,7 +1968,7 @@ void main() {
));
final EditableTextState state =
tester.state<EditableTextState>(find.byType(EditableText));
tester.state<EditableTextState>(find.byType(EditableText));
final RenderEditable renderEditable = state.renderEditable;
final Scrollable scrollable = tester.widget<Scrollable>(find.byType(Scrollable));
@@ -1963,12 +2023,14 @@ void main() {
// Check that the handles' positions are correct.
final List<CompositedTransformFollower> container =
find.byType(CompositedTransformFollower)
.evaluate()
.map((Element e) => e.widget)
.cast<CompositedTransformFollower>()
.toList();
final List<RenderBox> handles = List<RenderBox>.from(
tester.renderObjectList<RenderBox>(
find.descendant(
of: find.byType(CompositedTransformFollower),
matching: find.byType(GestureDetector),
),
),
);
final Size viewport = renderEditable.size;
@@ -2006,8 +2068,8 @@ void main() {
}
}
expect(state.selectionOverlay.handlesAreVisible, isTrue);
testPosition(container[0].offset.dx, leftPosition);
testPosition(container[1].offset.dx, rightPosition);
testPosition(handles[0].localToGlobal(Offset.zero).dx, leftPosition);
testPosition(handles[1].localToGlobal(Offset.zero).dx, rightPosition);
}
// Select the first word. Both handles should be visible.
@@ -2080,21 +2142,23 @@ void main() {
await tester.tapAt(const Offset(20, 10));
state.renderEditable.selectWord(cause: SelectionChangedCause.longPress);
await tester.pump();
final List<CompositedTransformFollower> container =
find.byType(CompositedTransformFollower)
.evaluate()
.map((Element e) => e.widget)
.cast<CompositedTransformFollower>()
.toList();
final List<RenderBox> handles = List<RenderBox>.from(
tester.renderObjectList<RenderBox>(
find.descendant(
of: find.byType(CompositedTransformFollower),
matching: find.byType(GestureDetector),
),
),
);
expect(
container[0].offset.dx,
handles[0].localToGlobal(Offset.zero).dx,
inExclusiveRange(
-kMinInteractiveSize,
kMinInteractiveSize,
),
);
expect(
container[1].offset.dx,
handles[1].localToGlobal(Offset.zero).dx,
inExclusiveRange(
70.0 - kMinInteractiveSize,
70.0 + kMinInteractiveSize,
@@ -2188,12 +2252,14 @@ void main() {
// Check that the handles' positions are correct.
final List<CompositedTransformFollower> container =
find.byType(CompositedTransformFollower)
.evaluate()
.map((Element e) => e.widget)
.cast<CompositedTransformFollower>()
.toList();
final List<RenderBox> handles = List<RenderBox>.from(
tester.renderObjectList<RenderBox>(
find.descendant(
of: find.byType(CompositedTransformFollower),
matching: find.byType(GestureDetector),
),
),
);
final Size viewport = renderEditable.size;
@@ -2231,8 +2297,8 @@ void main() {
}
}
expect(state.selectionOverlay.handlesAreVisible, isTrue);
testPosition(container[0].offset.dx, leftPosition);
testPosition(container[1].offset.dx, rightPosition);
testPosition(handles[0].localToGlobal(Offset.zero).dx, leftPosition);
testPosition(handles[1].localToGlobal(Offset.zero).dx, rightPosition);
}
// Select the first word. Both handles should be visible.