| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'dart:ui' as ui show TextBox, BoxHeightStyle, BoxWidthStyle; |
| |
| import 'package:flutter/gestures.dart'; |
| import 'package:flutter/rendering.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| import 'rendering_tester.dart'; |
| |
| const String _kText = "I polished up that handle so carefullee\nThat now I am the Ruler of the Queen's Navee!"; |
| |
| // A subclass of RenderParagraph that returns an empty list in getBoxesForSelection |
| // for a given TextSelection. |
| // This is intended to simulate SkParagraph's implementation of Paragraph.getBoxesForRange, |
| // which may return an empty list in some situations where Libtxt would return a list |
| // containing an empty box. |
| class RenderParagraphWithEmptySelectionBoxList extends RenderParagraph { |
| RenderParagraphWithEmptySelectionBoxList( |
| InlineSpan text, { |
| required TextDirection textDirection, |
| required this.emptyListSelection, |
| }) : super(text, textDirection: textDirection); |
| |
| TextSelection emptyListSelection; |
| |
| @override |
| List<ui.TextBox> getBoxesForSelection( |
| TextSelection selection, { |
| ui.BoxHeightStyle boxHeightStyle = ui.BoxHeightStyle.tight, |
| ui.BoxWidthStyle boxWidthStyle = ui.BoxWidthStyle.tight, |
| }) { |
| if (selection == emptyListSelection) { |
| return <ui.TextBox>[]; |
| } |
| return super.getBoxesForSelection( |
| selection, |
| boxHeightStyle: boxHeightStyle, |
| boxWidthStyle: boxWidthStyle, |
| ); |
| } |
| } |
| |
| // A subclass of RenderParagraph that returns an empty list in getBoxesForSelection |
| // for a selection representing a WidgetSpan. |
| // This is intended to simulate how SkParagraph's implementation of Paragraph.getBoxesForRange |
| // can return an empty list for a WidgetSpan with empty dimensions. |
| class RenderParagraphWithEmptyBoxListForWidgetSpan extends RenderParagraph { |
| RenderParagraphWithEmptyBoxListForWidgetSpan( |
| InlineSpan text, { |
| required List<RenderBox> children, |
| required TextDirection textDirection, |
| }) : super(text, children: children, textDirection: textDirection); |
| |
| @override |
| List<ui.TextBox> getBoxesForSelection( |
| TextSelection selection, { |
| ui.BoxHeightStyle boxHeightStyle = ui.BoxHeightStyle.tight, |
| ui.BoxWidthStyle boxWidthStyle = ui.BoxWidthStyle.tight, |
| }) { |
| if (text.getSpanForPosition(selection.base) is WidgetSpan) { |
| return <ui.TextBox>[]; |
| } |
| return super.getBoxesForSelection( |
| selection, |
| boxHeightStyle: boxHeightStyle, |
| boxWidthStyle: boxWidthStyle, |
| ); |
| } |
| } |
| |
| void main() { |
| test('getOffsetForCaret control test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| const Rect caret = Rect.fromLTWH(0.0, 0.0, 2.0, 20.0); |
| |
| final Offset offset5 = paragraph.getOffsetForCaret(const TextPosition(offset: 5), caret); |
| expect(offset5.dx, greaterThan(0.0)); |
| |
| final Offset offset25 = paragraph.getOffsetForCaret(const TextPosition(offset: 25), caret); |
| expect(offset25.dx, greaterThan(offset5.dx)); |
| |
| final Offset offset50 = paragraph.getOffsetForCaret(const TextPosition(offset: 50), caret); |
| expect(offset50.dy, greaterThan(offset5.dy)); |
| }); |
| |
| test('getFullHeightForCaret control test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText,style: TextStyle(fontSize: 10.0)), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| final double height5 = paragraph.getFullHeightForCaret(const TextPosition(offset: 5))!; |
| expect(height5, equals(10.0)); |
| }); |
| |
| test('getPositionForOffset control test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| final TextPosition position20 = paragraph.getPositionForOffset(const Offset(20.0, 5.0)); |
| expect(position20.offset, greaterThan(0.0)); |
| |
| final TextPosition position40 = paragraph.getPositionForOffset(const Offset(40.0, 5.0)); |
| expect(position40.offset, greaterThan(position20.offset)); |
| |
| final TextPosition positionBelow = paragraph.getPositionForOffset(const Offset(5.0, 20.0)); |
| expect(positionBelow.offset, greaterThan(position40.offset)); |
| }); |
| |
| test('getBoxesForSelection control test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText, style: TextStyle(fontSize: 10.0)), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 5, extentOffset: 25), |
| ); |
| |
| expect(boxes.length, equals(1)); |
| |
| boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 25, extentOffset: 50), |
| ); |
| |
| expect(boxes.any((ui.TextBox box) => box.left == 250 && box.top == 0), isTrue); |
| expect(boxes.any((ui.TextBox box) => box.right == 100 && box.top == 10), isTrue); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61016 |
| |
| test('getBoxesForSelection test with multiple TextSpans and lines', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: 'First ', |
| style: TextStyle(fontFamily: 'Ahem', fontSize: 10.0), |
| children: <InlineSpan>[ |
| TextSpan(text: 'smallsecond ', style: TextStyle(fontSize: 5.0)), |
| TextSpan(text: 'third fourth fifth'), |
| ], |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| // Do layout with width chosen so that this splits as |
| // First smallsecond | |
| // third fourth | |
| // fifth| |
| // The corresponding line widths come out to be: |
| // 1st line: 120px wide: 6 chars * 10px plus 12 chars * 5px. |
| // 2nd line: 130px wide: 13 chars * 10px. |
| // 3rd line: 50px wide. |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 140.0)); |
| |
| final List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 0, extentOffset: 36), |
| ); |
| |
| expect(boxes.length, equals(4)); |
| |
| // The widths of the boxes should match the calculations above. |
| // The heights should all be 10, except for the box for 'smallsecond ', |
| // which should have height 5, and be alphabetic baseline-aligned with |
| // 'First '. The Ahem font specifies alphabetic baselines at 0.2em above the |
| // bottom extent, and 0.8em below the top, so the difference in top |
| // alignment becomes (10px * 0.8 - 5px * 0.8) = 4px. |
| |
| // 'First ': |
| expect(boxes[0], const TextBox.fromLTRBD(0.0, 0.0, 60.0, 10.0, TextDirection.ltr)); |
| // 'smallsecond ' in size 5: |
| expect(boxes[1], const TextBox.fromLTRBD(60.0, 4.0, 120.0, 9.0, TextDirection.ltr)); |
| // 'third fourth ': |
| expect(boxes[2], const TextBox.fromLTRBD(0.0, 10.0, 130.0, 20.0, TextDirection.ltr)); |
| // 'fifth': |
| expect(boxes[3], const TextBox.fromLTRBD(0.0, 20.0, 50.0, 30.0, TextDirection.ltr)); |
| }, skip: !isLinux); // mac typography values can differ https://github.com/flutter/flutter/issues/12357 |
| |
| test('getBoxesForSelection test with boxHeightStyle and boxWidthStyle set to max', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: 'First ', |
| style: TextStyle(fontFamily: 'Ahem', fontSize: 10.0), |
| children: <InlineSpan>[ |
| TextSpan(text: 'smallsecond ', style: TextStyle(fontSize: 8.0)), |
| TextSpan(text: 'third fourth fifth'), |
| ], |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| // Do layout with width chosen so that this splits as |
| // First smallsecond | |
| // third fourth | |
| // fifth| |
| // The corresponding line widths come out to be: |
| // 1st line: 156px wide: 6 chars * 10px plus 12 chars * 8px. |
| // 2nd line: 130px wide: 13 chars * 10px. |
| // 3rd line: 50px wide. |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 160.0)); |
| |
| final List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 0, extentOffset: 36), |
| boxHeightStyle: ui.BoxHeightStyle.max, |
| boxWidthStyle: ui.BoxWidthStyle.max, |
| ); |
| |
| expect(boxes.length, equals(5)); |
| |
| // 'First ': |
| expect(boxes[0], const TextBox.fromLTRBD(0.0, 0.0, 60.0, 10.0, TextDirection.ltr)); |
| // 'smallsecond ' in size 8, but on same line as previous box, so height remains 10: |
| expect(boxes[1], const TextBox.fromLTRBD(60.0, 0.0, 156.0, 10.0, TextDirection.ltr)); |
| // 'third fourth ': |
| expect(boxes[2], const TextBox.fromLTRBD(0.0, 10.0, 130.0, 20.0, TextDirection.ltr)); |
| // extra box added to extend width, as per definition of ui.BoxWidthStyle.max: |
| expect(boxes[3], const TextBox.fromLTRBD(130.0, 10.0, 156.0, 20.0, TextDirection.ltr)); |
| // 'fifth': |
| expect(boxes[4], const TextBox.fromLTRBD(0.0, 20.0, 50.0, 30.0, TextDirection.ltr)); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61016 |
| |
| test('getWordBoundary control test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| final TextRange range5 = paragraph.getWordBoundary(const TextPosition(offset: 5)); |
| expect(range5.textInside(_kText), equals('polished')); |
| |
| final TextRange range50 = paragraph.getWordBoundary(const TextPosition(offset: 50)); |
| expect(range50.textInside(_kText), equals(' ')); |
| |
| final TextRange range85 = paragraph.getWordBoundary(const TextPosition(offset: 75)); |
| expect(range85.textInside(_kText), equals("Queen's")); |
| }); |
| |
| test('overflow test', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: 'This\n' // 4 characters * 10px font size = 40px width on the first line |
| 'is a wrapping test. It should wrap at manual newlines, and if softWrap is true, also at spaces.', |
| style: TextStyle(fontFamily: 'Ahem', fontSize: 10.0), |
| ), |
| textDirection: TextDirection.ltr, |
| maxLines: 1, |
| ); |
| |
| void relayoutWith({ |
| int? maxLines, |
| required bool softWrap, |
| required TextOverflow overflow, |
| }) { |
| paragraph |
| ..maxLines = maxLines |
| ..softWrap = softWrap |
| ..overflow = overflow; |
| pumpFrame(); |
| } |
| |
| // Lay out in a narrow box to force wrapping. |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 50.0)); // enough to fit "This" but not "This is" |
| final double lineHeight = paragraph.size.height; |
| |
| relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.clip); |
| expect(paragraph.size.height, equals(3 * lineHeight)); |
| |
| relayoutWith(softWrap: true, overflow: TextOverflow.clip); |
| expect(paragraph.size.height, greaterThan(5 * lineHeight)); |
| |
| // Try again with ellipsis overflow. We can't test that the ellipsis are |
| // drawn, but we can test the sizing. |
| relayoutWith(maxLines: 1, softWrap: true, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(lineHeight)); |
| |
| relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(3 * lineHeight)); |
| |
| // This is the one weird case. If maxLines is null, we would expect to allow |
| // infinite wrapping. However, if we did, we'd never know when to append an |
| // ellipsis, so this really means "append ellipsis as soon as we exceed the |
| // width". |
| relayoutWith(softWrap: true, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(2 * lineHeight)); |
| |
| // Now with no soft wrapping. |
| relayoutWith(maxLines: 1, softWrap: false, overflow: TextOverflow.clip); |
| expect(paragraph.size.height, equals(lineHeight)); |
| |
| relayoutWith(maxLines: 3, softWrap: false, overflow: TextOverflow.clip); |
| expect(paragraph.size.height, equals(2 * lineHeight)); |
| |
| relayoutWith(softWrap: false, overflow: TextOverflow.clip); |
| expect(paragraph.size.height, equals(2 * lineHeight)); |
| |
| relayoutWith(maxLines: 1, softWrap: false, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(lineHeight)); |
| |
| relayoutWith(maxLines: 3, softWrap: false, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(3 * lineHeight)); |
| |
| relayoutWith(softWrap: false, overflow: TextOverflow.ellipsis); |
| expect(paragraph.size.height, equals(2 * lineHeight)); |
| |
| // Test presence of the fade effect. |
| relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.fade); |
| expect(paragraph.debugHasOverflowShader, isTrue); |
| |
| // Change back to ellipsis and check that the fade shader is cleared. |
| relayoutWith(maxLines: 3, softWrap: true, overflow: TextOverflow.ellipsis); |
| expect(paragraph.debugHasOverflowShader, isFalse); |
| |
| relayoutWith(maxLines: 100, softWrap: true, overflow: TextOverflow.fade); |
| expect(paragraph.debugHasOverflowShader, isFalse); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61018 |
| |
| test('maxLines', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: "How do you write like you're running out of time? Write day and night like you're running out of time?", |
| // 0123456789 0123456789 012 345 0123456 012345 01234 012345678 012345678 0123 012 345 0123456 012345 01234 |
| // 0 1 2 3 4 5 6 7 8 9 10 11 12 |
| style: TextStyle(fontFamily: 'Ahem', fontSize: 10.0), |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0)); |
| void layoutAt(int? maxLines) { |
| paragraph.maxLines = maxLines; |
| pumpFrame(); |
| } |
| |
| layoutAt(null); |
| expect(paragraph.size.height, 130.0); |
| |
| layoutAt(1); |
| expect(paragraph.size.height, 10.0); |
| |
| layoutAt(2); |
| expect(paragraph.size.height, 20.0); |
| |
| layoutAt(3); |
| expect(paragraph.size.height, 30.0); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61018 |
| |
| test('changing color does not do layout', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: 'Hello', |
| style: TextStyle(color: Color(0xFF000000)), |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0), phase: EnginePhase.paint); |
| expect(paragraph.debugNeedsLayout, isFalse); |
| expect(paragraph.debugNeedsPaint, isFalse); |
| paragraph.text = const TextSpan( |
| text: 'Hello World', |
| style: TextStyle(color: Color(0xFF000000)), |
| ); |
| expect(paragraph.debugNeedsLayout, isTrue); |
| expect(paragraph.debugNeedsPaint, isFalse); |
| pumpFrame(phase: EnginePhase.paint); |
| expect(paragraph.debugNeedsLayout, isFalse); |
| expect(paragraph.debugNeedsPaint, isFalse); |
| paragraph.text = const TextSpan( |
| text: 'Hello World', |
| style: TextStyle(color: Color(0xFFFFFFFF)), |
| ); |
| expect(paragraph.debugNeedsLayout, isFalse); |
| expect(paragraph.debugNeedsPaint, isTrue); |
| pumpFrame(phase: EnginePhase.paint); |
| expect(paragraph.debugNeedsLayout, isFalse); |
| expect(paragraph.debugNeedsPaint, isFalse); |
| }); |
| |
| test('nested TextSpans in paragraph handle textScaleFactor correctly.', () { |
| const TextSpan testSpan = TextSpan( |
| text: 'a', |
| style: TextStyle( |
| fontSize: 10.0, |
| ), |
| children: <TextSpan>[ |
| TextSpan( |
| text: 'b', |
| children: <TextSpan>[ |
| TextSpan(text: 'c'), |
| ], |
| style: TextStyle( |
| fontSize: 20.0, |
| ), |
| ), |
| TextSpan( |
| text: 'd', |
| ), |
| ], |
| ); |
| final RenderParagraph paragraph = RenderParagraph( |
| testSpan, |
| textDirection: TextDirection.ltr, |
| textScaleFactor: 1.3, |
| ); |
| paragraph.layout(const BoxConstraints()); |
| // anyOf is needed here because Linux and Mac have different text |
| // rendering widths in tests. |
| // TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357 |
| expect(paragraph.size.width, anyOf(79.0, 78.0)); |
| expect(paragraph.size.height, 26.0); |
| |
| // Test the sizes of nested spans. |
| final String text = testSpan.toStringDeep(); |
| final List<ui.TextBox> boxes = <ui.TextBox>[ |
| for (int i = 0; i < text.length; ++i) |
| ...paragraph.getBoxesForSelection( |
| TextSelection(baseOffset: i, extentOffset: i + 1), |
| ), |
| ]; |
| expect(boxes.length, equals(4)); |
| |
| // anyOf is needed here and below because Linux and Mac have different text |
| // rendering widths in tests. |
| // TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357 |
| expect(boxes[0].toRect().width, anyOf(14.0, 13.0)); |
| expect(boxes[0].toRect().height, moreOrLessEquals(13.0, epsilon: 0.0001)); |
| expect(boxes[1].toRect().width, anyOf(27.0, 26.0)); |
| expect(boxes[1].toRect().height, moreOrLessEquals(26.0, epsilon: 0.0001)); |
| expect(boxes[2].toRect().width, anyOf(27.0, 26.0)); |
| expect(boxes[2].toRect().height, moreOrLessEquals(26.0, epsilon: 0.0001)); |
| expect(boxes[3].toRect().width, anyOf(14.0, 13.0)); |
| expect(boxes[3].toRect().height, moreOrLessEquals(13.0, epsilon: 0.0001)); |
| }); |
| |
| test('toStringDeep', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText), |
| textDirection: TextDirection.ltr, |
| locale: const Locale('ja', 'JP'), |
| ); |
| expect(paragraph, hasAGoodToStringDeep); |
| expect( |
| paragraph.toStringDeep(minLevel: DiagnosticLevel.info), |
| equalsIgnoringHashCodes( |
| 'RenderParagraph#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n' |
| ' │ parentData: MISSING\n' |
| ' │ constraints: MISSING\n' |
| ' │ size: MISSING\n' |
| ' │ textAlign: start\n' |
| ' │ textDirection: ltr\n' |
| ' │ softWrap: wrapping at box width\n' |
| ' │ overflow: clip\n' |
| ' │ locale: ja_JP\n' |
| ' │ maxLines: unlimited\n' |
| ' ╘═╦══ text ═══\n' |
| ' ║ TextSpan:\n' |
| ' ║ "I polished up that handle so carefullee\n' |
| ' ║ That now I am the Ruler of the Queen\'s Navee!"\n' |
| ' ╚═══════════\n', |
| ), |
| ); |
| }); |
| |
| test('locale setter', () { |
| // Regression test for https://github.com/flutter/flutter/issues/18175 |
| |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: _kText), |
| locale: const Locale('zh', 'HK'), |
| textDirection: TextDirection.ltr, |
| ); |
| expect(paragraph.locale, const Locale('zh', 'HK')); |
| |
| paragraph.locale = const Locale('ja', 'JP'); |
| expect(paragraph.locale, const Locale('ja', 'JP')); |
| }); |
| |
| test('inline widgets test', () { |
| const TextSpan text = TextSpan( |
| text: 'a', |
| style: TextStyle(fontSize: 10.0), |
| children: <InlineSpan>[ |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| TextSpan(text: 'a'), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| ], |
| ); |
| // Fake the render boxes that correspond to the WidgetSpans. We use |
| // RenderParagraph to reduce dependencies this test has. |
| final List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| ]; |
| |
| final RenderParagraph paragraph = RenderParagraph( |
| text, |
| textDirection: TextDirection.ltr, |
| children: renderBoxes, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0)); |
| |
| final List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 0, extentOffset: 8), |
| ); |
| |
| expect(boxes.length, equals(5)); |
| expect(boxes[0], const TextBox.fromLTRBD(0.0, 4.0, 10.0, 14.0, TextDirection.ltr)); |
| expect(boxes[1], const TextBox.fromLTRBD(10.0, 0.0, 24.0, 14.0, TextDirection.ltr)); |
| expect(boxes[2], const TextBox.fromLTRBD(24.0, 0.0, 38.0, 14.0, TextDirection.ltr)); |
| expect(boxes[3], const TextBox.fromLTRBD(38.0, 4.0, 48.0, 14.0, TextDirection.ltr)); |
| expect(boxes[4], const TextBox.fromLTRBD(48.0, 0.0, 62.0, 14.0, TextDirection.ltr)); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61020 |
| |
| test('getBoxesForSelection with boxHeightStyle for inline widgets', () { |
| const TextSpan text = TextSpan( |
| text: 'a', |
| style: TextStyle(fontSize: 10.0), |
| children: <InlineSpan>[ |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| TextSpan(text: 'a'), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| ], |
| ); |
| // Fake the render boxes that correspond to the WidgetSpans. We use |
| // RenderParagraph to reduce the dependencies this test has. The dimensions |
| // of these get used in place of the widths and heights specified in the |
| // SizedBoxes above: each comes out as (w,h) = (14,14). |
| final List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| ]; |
| |
| final RenderParagraph paragraph = RenderParagraph( |
| text, |
| textDirection: TextDirection.ltr, |
| children: renderBoxes, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 100.0)); |
| |
| final List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 0, extentOffset: 8), |
| boxHeightStyle: ui.BoxHeightStyle.max, |
| ); |
| |
| expect(boxes.length, equals(5)); |
| expect(boxes[0], const TextBox.fromLTRBD(0.0, 0.0, 10.0, 14.0, TextDirection.ltr)); |
| expect(boxes[1], const TextBox.fromLTRBD(10.0, 0.0, 24.0, 14.0, TextDirection.ltr)); |
| expect(boxes[2], const TextBox.fromLTRBD(24.0, 0.0, 38.0, 14.0, TextDirection.ltr)); |
| expect(boxes[3], const TextBox.fromLTRBD(38.0, 0.0, 48.0, 14.0, TextDirection.ltr)); |
| expect(boxes[4], const TextBox.fromLTRBD(48.0, 0.0, 62.0, 14.0, TextDirection.ltr)); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61020 |
| |
| test('can compute IntrinsicHeight for widget span', () { |
| // Regression test for https://github.com/flutter/flutter/issues/59316 |
| const double screenWidth = 100.0; |
| const String sentence = 'one two'; |
| List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: sentence), textDirection: TextDirection.ltr), |
| ]; |
| RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| children: <InlineSpan> [ |
| WidgetSpan(child: Text(sentence)), |
| ], |
| ), |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: screenWidth)); |
| final double singleLineHeight = paragraph.computeMaxIntrinsicHeight(screenWidth); |
| expect(singleLineHeight, 14.0); |
| |
| pumpFrame(); |
| renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: sentence), textDirection: TextDirection.ltr), |
| ]; |
| paragraph = RenderParagraph( |
| const TextSpan( |
| children: <InlineSpan> [ |
| WidgetSpan(child: Text(sentence)), |
| ], |
| ), |
| textScaleFactor: 2.0, |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: screenWidth)); |
| final double maxIntrinsicHeight = paragraph.computeMaxIntrinsicHeight(screenWidth); |
| final double minIntrinsicHeight = paragraph.computeMinIntrinsicHeight(screenWidth); |
| // intrinsicHeight = singleLineHeight * textScaleFactor * two lines. |
| expect(maxIntrinsicHeight, singleLineHeight * 2.0 * 2); |
| expect(maxIntrinsicHeight, minIntrinsicHeight); |
| }); |
| |
| test('can compute IntrinsicWidth for widget span', () { |
| // Regression test for https://github.com/flutter/flutter/issues/59316 |
| const double screenWidth = 1000.0; |
| const double fixedHeight = 1000.0; |
| const String sentence = 'one two'; |
| List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: sentence), textDirection: TextDirection.ltr), |
| ]; |
| RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| children: <InlineSpan> [ |
| WidgetSpan(child: Text(sentence)), |
| ], |
| ), |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: screenWidth)); |
| final double widthForOneLine = paragraph.computeMaxIntrinsicWidth(fixedHeight); |
| expect(widthForOneLine, 98.0); |
| |
| pumpFrame(); |
| renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: sentence), textDirection: TextDirection.ltr), |
| ]; |
| paragraph = RenderParagraph( |
| const TextSpan( |
| children: <InlineSpan> [ |
| WidgetSpan(child: Text(sentence)), |
| ], |
| ), |
| textScaleFactor: 2.0, |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: screenWidth)); |
| final double maxIntrinsicWidth = paragraph.computeMaxIntrinsicWidth(fixedHeight); |
| // maxIntrinsicWidth = widthForOneLine * textScaleFactor |
| expect(maxIntrinsicWidth, widthForOneLine * 2.0); |
| }); |
| |
| test('inline widgets multiline test', () { |
| const TextSpan text = TextSpan( |
| text: 'a', |
| style: TextStyle(fontSize: 10.0), |
| children: <InlineSpan>[ |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| TextSpan(text: 'a'), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| WidgetSpan(child: SizedBox(width: 21, height: 21)), |
| ], |
| ); |
| // Fake the render boxes that correspond to the WidgetSpans. We use |
| // RenderParagraph to reduce dependencies this test has. |
| final List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| ]; |
| |
| final RenderParagraph paragraph = RenderParagraph( |
| text, |
| textDirection: TextDirection.ltr, |
| children: renderBoxes, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: 50.0)); |
| |
| final List<ui.TextBox> boxes = paragraph.getBoxesForSelection( |
| const TextSelection(baseOffset: 0, extentOffset: 12), |
| ); |
| |
| expect(boxes.length, equals(9)); |
| expect(boxes[0], const TextBox.fromLTRBD(0.0, 4.0, 10.0, 14.0, TextDirection.ltr)); |
| expect(boxes[1], const TextBox.fromLTRBD(10.0, 0.0, 24.0, 14.0, TextDirection.ltr)); |
| expect(boxes[2], const TextBox.fromLTRBD(24.0, 0.0, 38.0, 14.0, TextDirection.ltr)); |
| expect(boxes[3], const TextBox.fromLTRBD(38.0, 4.0, 48.0, 14.0, TextDirection.ltr)); |
| // Wraps |
| expect(boxes[4], const TextBox.fromLTRBD(0.0, 14.0, 14.0, 28.0 , TextDirection.ltr)); |
| expect(boxes[5], const TextBox.fromLTRBD(14.0, 14.0, 28.0, 28.0, TextDirection.ltr)); |
| expect(boxes[6], const TextBox.fromLTRBD(28.0, 14.0, 42.0, 28.0, TextDirection.ltr)); |
| // Wraps |
| expect(boxes[7], const TextBox.fromLTRBD(0.0, 28.0, 14.0, 42.0, TextDirection.ltr)); |
| expect(boxes[8], const TextBox.fromLTRBD(14.0, 28.0, 28.0, 42.0 , TextDirection.ltr)); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61020 |
| |
| test('Does not include the semantics node of truncated rendering children', () { |
| // Regression test for https://github.com/flutter/flutter/issues/88180 |
| const double screenWidth = 100; |
| const String sentence = 'truncated'; |
| final List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph( |
| const TextSpan(text: sentence), textDirection: TextDirection.ltr), |
| ]; |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan( |
| text: 'a long line to be truncated.', |
| children: <InlineSpan>[ |
| WidgetSpan(child: Text(sentence)), |
| ], |
| ), |
| overflow: TextOverflow.ellipsis, |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph, constraints: const BoxConstraints(maxWidth: screenWidth)); |
| final SemanticsNode result = SemanticsNode(); |
| final SemanticsNode truncatedChild = SemanticsNode(); |
| truncatedChild.tags = <SemanticsTag>{const PlaceholderSpanIndexSemanticsTag(0)}; |
| paragraph.assembleSemanticsNode(result, SemanticsConfiguration(), <SemanticsNode>[truncatedChild]); |
| // It should only contain the semantics node of the TextSpan. |
| expect(result.childrenCount, 1); |
| result.visitChildren((SemanticsNode node) { |
| expect(node != truncatedChild, isTrue); |
| return true; |
| }); |
| }); |
| |
| test('Supports gesture recognizer semantics', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| TextSpan(text: _kText, children: <InlineSpan>[ |
| TextSpan(text: 'one', recognizer: TapGestureRecognizer()..onTap = () {}), |
| TextSpan(text: 'two', recognizer: LongPressGestureRecognizer()..onLongPress = () {}), |
| TextSpan(text: 'three', recognizer: DoubleTapGestureRecognizer()..onDoubleTap = () {}), |
| ]), |
| textDirection: TextDirection.rtl, |
| ); |
| layout(paragraph); |
| |
| paragraph.assembleSemanticsNode(SemanticsNode(), SemanticsConfiguration(), <SemanticsNode>[]); |
| }); |
| |
| test('Supports empty text span with spell out', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| const TextSpan(text: '', spellOut: true), |
| textDirection: TextDirection.rtl, |
| ); |
| layout(paragraph); |
| final SemanticsNode node = SemanticsNode(); |
| paragraph.assembleSemanticsNode(node, SemanticsConfiguration(), <SemanticsNode>[]); |
| expect(node.attributedLabel.string, ''); |
| expect(node.attributedLabel.attributes.length, 0); |
| }); |
| |
| test('Asserts on unsupported gesture recognizer', () { |
| final RenderParagraph paragraph = RenderParagraph( |
| TextSpan(text: _kText, children: <InlineSpan>[ |
| TextSpan(text: 'three', recognizer: MultiTapGestureRecognizer()..onTap = (int id) {}), |
| ]), |
| textDirection: TextDirection.rtl, |
| ); |
| layout(paragraph); |
| |
| bool failed = false; |
| try { |
| paragraph.assembleSemanticsNode(SemanticsNode(), SemanticsConfiguration(), <SemanticsNode>[]); |
| } on AssertionError catch (e) { |
| failed = true; |
| expect(e.message, 'MultiTapGestureRecognizer is not supported.'); |
| } |
| expect(failed, true); |
| }); |
| |
| test('assembleSemanticsNode handles text spans that do not yield selection boxes', () { |
| final RenderParagraph paragraph = RenderParagraphWithEmptySelectionBoxList( |
| TextSpan(text: '', children: <InlineSpan>[ |
| TextSpan(text: 'A', recognizer: TapGestureRecognizer()..onTap = () {}), |
| TextSpan(text: 'B', recognizer: TapGestureRecognizer()..onTap = () {}), |
| TextSpan(text: 'C', recognizer: TapGestureRecognizer()..onTap = () {}), |
| ]), |
| textDirection: TextDirection.rtl, |
| emptyListSelection: const TextSelection(baseOffset: 0, extentOffset: 1), |
| ); |
| layout(paragraph); |
| |
| final SemanticsNode node = SemanticsNode(); |
| paragraph.assembleSemanticsNode(node, SemanticsConfiguration(), <SemanticsNode>[]); |
| expect(node.childrenCount, 2); |
| }); |
| |
| test('assembleSemanticsNode handles empty WidgetSpans that do not yield selection boxes', () { |
| final TextSpan text = TextSpan(text: '', children: <InlineSpan>[ |
| TextSpan(text: 'A', recognizer: TapGestureRecognizer()..onTap = () {}), |
| const WidgetSpan(child: SizedBox(width: 0, height: 0)), |
| TextSpan(text: 'C', recognizer: TapGestureRecognizer()..onTap = () {}), |
| ]); |
| final List<RenderBox> renderBoxes = <RenderBox>[ |
| RenderParagraph(const TextSpan(text: 'b'), textDirection: TextDirection.ltr), |
| ]; |
| final RenderParagraph paragraph = RenderParagraphWithEmptyBoxListForWidgetSpan( |
| text, |
| children: renderBoxes, |
| textDirection: TextDirection.ltr, |
| ); |
| layout(paragraph); |
| |
| final SemanticsNode node = SemanticsNode(); |
| paragraph.assembleSemanticsNode(node, SemanticsConfiguration(), <SemanticsNode>[]); |
| expect(node.childrenCount, 2); |
| }, skip: isBrowser); // https://github.com/flutter/flutter/issues/61020 |
| } |
