| // Copyright 2017 The Chromium 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; |
| |
| import 'package:flutter/painting.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| test('TextPainter caret test', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| String text = 'A'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| |
| Offset caretOffset = painter.getOffsetForCaret( |
| const ui.TextPosition(offset: 0), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, 0); |
| caretOffset = painter.getOffsetForCaret(ui.TextPosition(offset: text.length), ui.Rect.zero); |
| expect(caretOffset.dx, painter.width); |
| |
| // Check that getOffsetForCaret handles a character that is encoded as a surrogate pair. |
| text = 'A\u{1F600}'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| caretOffset = painter.getOffsetForCaret(ui.TextPosition(offset: text.length), ui.Rect.zero); |
| expect(caretOffset.dx, painter.width); |
| }, skip: isBrowser); |
| |
| test('TextPainter null text test', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| List<TextSpan> children = <TextSpan>[const TextSpan(text: 'B'), const TextSpan(text: 'C')]; |
| painter.text = TextSpan(text: null, children: children); |
| painter.layout(); |
| |
| Offset caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 0), ui.Rect.zero); |
| expect(caretOffset.dx, 0); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 1), ui.Rect.zero); |
| expect(caretOffset.dx, painter.width / 2); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 2), ui.Rect.zero); |
| expect(caretOffset.dx, painter.width); |
| |
| children = <TextSpan>[]; |
| painter.text = TextSpan(text: null, children: children); |
| painter.layout(); |
| |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 0), ui.Rect.zero); |
| expect(caretOffset.dx, 0); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 1), ui.Rect.zero); |
| expect(caretOffset.dx, 0); |
| }, skip: isBrowser); |
| |
| test('TextPainter caret emoji test', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| // Format: '👩<zwj>👩<zwj>👦👩<zwj>👩<zwj>👧<zwj>👧🇺🇸' |
| // One three-person family, one four person family, one US flag. |
| const String text = '👩👩👦👩👩👧👧🇺🇸'; |
| painter.text = const TextSpan(text: text); |
| painter.layout(maxWidth: 10000); |
| |
| expect(text.length, 23); |
| |
| Offset caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 0), ui.Rect.zero); |
| expect(caretOffset.dx, 0); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: text.length), ui.Rect.zero); |
| expect(caretOffset.dx, painter.width); |
| |
| // Two UTF-16 codepoints per emoji, one codepoint per zwj |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 1), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 2), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // <zwj> |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 3), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 4), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 5), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // <zwj> |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 6), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👦 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 7), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👦 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 8), ui.Rect.zero); |
| expect(caretOffset.dx, 42); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 9), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 10), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // <zwj> |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 11), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 12), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👩 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 13), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // <zwj> |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 14), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👧 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 15), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👧 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 16), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // <zwj> |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 17), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👧 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 18), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 👧 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 19), ui.Rect.zero); |
| expect(caretOffset.dx, 98); // 🇺 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 20), ui.Rect.zero); |
| expect(caretOffset.dx, 112); // 🇺 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 21), ui.Rect.zero); |
| expect(caretOffset.dx, 112); // 🇸 |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 22), ui.Rect.zero); |
| expect(caretOffset.dx, 112); // 🇸 |
| }, skip: isBrowser); |
| |
| test('TextPainter caret center space test', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| const String text = 'test text with space at end '; |
| painter.text = const TextSpan(text: text); |
| painter.textAlign = TextAlign.center; |
| painter.layout(); |
| |
| Offset caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 0), ui.Rect.zero); |
| expect(caretOffset.dx, 21); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: text.length), ui.Rect.zero); |
| // The end of the line is 441, but the width is only 420, so the cursor is |
| // stopped there without overflowing. |
| expect(caretOffset.dx, painter.width); |
| |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 1), ui.Rect.zero); |
| expect(caretOffset.dx, 35); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 2), ui.Rect.zero); |
| expect(caretOffset.dx, 49); |
| }, skip: isBrowser); |
| |
| test('TextPainter error test', () { |
| final TextPainter painter = TextPainter(textDirection: TextDirection.ltr); |
| expect(() { painter.paint(null, Offset.zero); }, throwsFlutterError); |
| }); |
| |
| test('TextPainter requires textDirection', () { |
| final TextPainter painter1 = TextPainter(text: const TextSpan(text: '')); |
| expect(() { painter1.layout(); }, throwsAssertionError); |
| final TextPainter painter2 = TextPainter(text: const TextSpan(text: ''), textDirection: TextDirection.rtl); |
| expect(() { painter2.layout(); }, isNot(throwsException)); |
| }); |
| |
| test('TextPainter size test', () { |
| final TextPainter painter = TextPainter( |
| text: const TextSpan( |
| text: 'X', |
| style: TextStyle( |
| inherit: false, |
| fontFamily: 'Ahem', |
| fontSize: 123.0, |
| ), |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(123.0, 123.0)); |
| }, skip: isBrowser); |
| |
| test('TextPainter textScaleFactor test', () { |
| final TextPainter painter = TextPainter( |
| text: const TextSpan( |
| text: 'X', |
| style: TextStyle( |
| inherit: false, |
| fontFamily: 'Ahem', |
| fontSize: 10.0, |
| ), |
| ), |
| textDirection: TextDirection.ltr, |
| textScaleFactor: 2.0, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(20.0, 20.0)); |
| }, skip: isBrowser); |
| |
| test('TextPainter default text height is 14 pixels', () { |
| final TextPainter painter = TextPainter( |
| text: const TextSpan(text: 'x'), |
| textDirection: TextDirection.ltr, |
| ); |
| painter.layout(); |
| expect(painter.preferredLineHeight, 14.0); |
| expect(painter.size, const Size(14.0, 14.0)); |
| }, skip: isBrowser); |
| |
| test('TextPainter sets paragraph size from root', () { |
| final TextPainter painter = TextPainter( |
| text: const TextSpan(text: 'x', style: TextStyle(fontSize: 100.0)), |
| textDirection: TextDirection.ltr, |
| ); |
| painter.layout(); |
| expect(painter.preferredLineHeight, 100.0); |
| expect(painter.size, const Size(100.0, 100.0)); |
| }, skip: isBrowser); |
| |
| test('TextPainter intrinsic dimensions', () { |
| const TextStyle style = TextStyle( |
| inherit: false, |
| fontFamily: 'Ahem', |
| fontSize: 10.0, |
| ); |
| TextPainter painter; |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'X X X', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(50.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 10.0); |
| expect(painter.maxIntrinsicWidth, 50.0); |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'X X X', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| ellipsis: 'e', |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(50.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 50.0); |
| expect(painter.maxIntrinsicWidth, 50.0); |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'X X XXXX', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| maxLines: 2, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(80.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 40.0); |
| expect(painter.maxIntrinsicWidth, 80.0); |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'X X XXXX XX', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| maxLines: 2, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(110.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 70.0); |
| expect(painter.maxIntrinsicWidth, 110.0); |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'XXXXXXXX XXXX XX X', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| maxLines: 2, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(180.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 90.0); |
| expect(painter.maxIntrinsicWidth, 180.0); |
| |
| painter = TextPainter( |
| text: const TextSpan( |
| text: 'X XX XXXX XXXXXXXX', |
| style: style, |
| ), |
| textDirection: TextDirection.ltr, |
| maxLines: 2, |
| ); |
| painter.layout(); |
| expect(painter.size, const Size(180.0, 10.0)); |
| expect(painter.minIntrinsicWidth, 90.0); |
| expect(painter.maxIntrinsicWidth, 180.0); |
| }, skip: true); // https://github.com/flutter/flutter/issues/13512 |
| |
| test('TextPainter handles newlines properly', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| const double SIZE_OF_A = 14.0; // square size of "a" character |
| String text = 'aaa'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| |
| // getOffsetForCaret in a plain one-line string is the same for either affinity. |
| int offset = 0; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| Offset caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| offset = 1; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| offset = 2; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| offset = 3; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * offset, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| |
| // For explicit newlines, getOffsetForCaret places the caret at the location |
| // indicated by offset regardless of affinity. |
| text = '\n\n'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| offset = 0; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| offset = 1; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| offset = 2; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.0001)); |
| |
| // getOffsetForCaret in an unwrapped string with explicit newlines is the |
| // same for either affinity. |
| text = '\naaa'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| offset = 0; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| offset = 1; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| |
| // When text wraps on its own, getOffsetForCaret disambiguates between the |
| // end of one line and start of next using affinity. |
| text = 'aaaaaaaa'; // Just enough to wrap one character down to second line |
| painter.text = TextSpan(text: text); |
| painter.layout(maxWidth: 100); // SIZE_OF_A * text.length > 100, so it wraps |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: text.length - 1), |
| ui.Rect.zero, |
| ); |
| // When affinity is downstream, cursor is at beginning of second line |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: text.length - 1, affinity: ui.TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| // When affinity is upstream, cursor is at end of first line |
| expect(caretOffset.dx, closeTo(98.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| |
| // When given a string with a newline at the end, getOffsetForCaret puts |
| // the cursor at the start of the next line regardless of affinity |
| text = 'aaa\n'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: text.length), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| offset = text.length; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| |
| // Given a one-line right aligned string, positioning the cursor at offset 0 |
| // means that it appears at the "end" of the string, after the character |
| // that was typed first, at x=0. |
| painter.textAlign = TextAlign.right; |
| text = 'aaa'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| offset = 0; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| painter.textAlign = TextAlign.left; |
| |
| // When given an offset after a newline in the middle of a string, |
| // getOffsetForCaret returns the start of the next line regardless of |
| // affinity. |
| text = 'aaa\naaa'; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| offset = 4; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| |
| // When given a string with multiple trailing newlines, places the caret |
| // in the position given by offset regardless of affinity. |
| text = 'aaa\n\n\n'; |
| offset = 3; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * 3, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(SIZE_OF_A * 3, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| |
| offset = 4; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| |
| offset = 5; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.0001)); |
| |
| offset = 6; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 3, 0.0001)); |
| |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 3, 0.0001)); |
| |
| // When given a string with multiple leading newlines, places the caret in |
| // the position given by offset regardless of affinity. |
| text = '\n\n\naaa'; |
| offset = 3; |
| painter.text = TextSpan(text: text); |
| painter.layout(); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 3, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 3, 0.0001)); |
| |
| offset = 2; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A * 2, 0.0001)); |
| |
| offset = 1; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy,closeTo(SIZE_OF_A, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(SIZE_OF_A, 0.0001)); |
| |
| offset = 0; |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| caretOffset = painter.getOffsetForCaret( |
| ui.TextPosition(offset: offset, affinity: TextAffinity.upstream), |
| ui.Rect.zero, |
| ); |
| expect(caretOffset.dx, closeTo(0.0, 0.0001)); |
| expect(caretOffset.dy, closeTo(0.0, 0.0001)); |
| }, skip: isBrowser); |
| |
| test('TextPainter widget span', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| const String text = 'test'; |
| painter.text = const TextSpan( |
| text: text, |
| children: <InlineSpan>[ |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| TextSpan(text: text), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| TextSpan(text: text), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| WidgetSpan(child: SizedBox(width: 50, height: 30)), |
| ], |
| ); |
| |
| // We provide dimensions for the widgets |
| painter.setPlaceholderDimensions(const <PlaceholderDimensions>[ |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(51, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| PlaceholderDimensions(size: Size(50, 30), baselineOffset: 25, alignment: ui.PlaceholderAlignment.bottom), |
| ]); |
| |
| painter.layout(maxWidth: 500); |
| |
| // Now, each of the WidgetSpans will have their own placeholder 'hole'. |
| Offset caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 1), ui.Rect.zero); |
| expect(caretOffset.dx, 14); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 4), ui.Rect.zero); |
| expect(caretOffset.dx, 56); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 5), ui.Rect.zero); |
| expect(caretOffset.dx, 106); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 6), ui.Rect.zero); |
| expect(caretOffset.dx, 120); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 10), ui.Rect.zero); |
| expect(caretOffset.dx, 212); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 11), ui.Rect.zero); |
| expect(caretOffset.dx, 262); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 12), ui.Rect.zero); |
| expect(caretOffset.dx, 276); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 13), ui.Rect.zero); |
| expect(caretOffset.dx, 290); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 14), ui.Rect.zero); |
| expect(caretOffset.dx, 304); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 15), ui.Rect.zero); |
| expect(caretOffset.dx, 318); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 16), ui.Rect.zero); |
| expect(caretOffset.dx, 368); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 17), ui.Rect.zero); |
| expect(caretOffset.dx, 418); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 18), ui.Rect.zero); |
| expect(caretOffset.dx, 0); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 19), ui.Rect.zero); |
| expect(caretOffset.dx, 50); |
| caretOffset = painter.getOffsetForCaret(const ui.TextPosition(offset: 23), ui.Rect.zero); |
| expect(caretOffset.dx, 250); |
| |
| expect(painter.inlinePlaceholderBoxes.length, 14); |
| expect(painter.inlinePlaceholderBoxes[0], const TextBox.fromLTRBD(56, 0, 106, 30, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[2], const TextBox.fromLTRBD(212, 0, 262, 30, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[3], const TextBox.fromLTRBD(318, 0, 368, 30, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[4], const TextBox.fromLTRBD(368, 0, 418, 30, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[5], const TextBox.fromLTRBD(418, 0, 468, 30, TextDirection.ltr)); |
| // line should break here |
| expect(painter.inlinePlaceholderBoxes[6], const TextBox.fromLTRBD(0, 30, 50, 60, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[7], const TextBox.fromLTRBD(50, 30, 100, 60, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[10], const TextBox.fromLTRBD(200, 30, 250, 60, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[11], const TextBox.fromLTRBD(250, 30, 300, 60, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[12], const TextBox.fromLTRBD(300, 30, 351, 60, TextDirection.ltr)); |
| expect(painter.inlinePlaceholderBoxes[13], const TextBox.fromLTRBD(351, 30, 401, 60, TextDirection.ltr)); |
| }, skip: isBrowser); |
| |
| test('TextPainter line metrics', () { |
| final TextPainter painter = TextPainter() |
| ..textDirection = TextDirection.ltr; |
| |
| const String text = 'test1\nhello line two really long for soft break\nfinal line 4'; |
| painter.text = const TextSpan( |
| text: text, |
| ); |
| |
| painter.layout(maxWidth: 300); |
| |
| final List<ui.LineMetrics> lines = painter.computeLineMetrics(); |
| |
| expect(lines.length, 4); |
| |
| expect(lines[0].hardBreak, true); |
| expect(lines[1].hardBreak, false); |
| expect(lines[2].hardBreak, true); |
| expect(lines[3].hardBreak, true); |
| |
| expect(lines[0].ascent, 11.199999809265137); |
| expect(lines[1].ascent, 11.199999809265137); |
| expect(lines[2].ascent, 11.199999809265137); |
| expect(lines[3].ascent, 11.199999809265137); |
| |
| expect(lines[0].descent, 2.799999952316284); |
| expect(lines[1].descent, 2.799999952316284); |
| expect(lines[2].descent, 2.799999952316284); |
| expect(lines[3].descent, 2.799999952316284); |
| |
| expect(lines[0].unscaledAscent, 11.199999809265137); |
| expect(lines[1].unscaledAscent, 11.199999809265137); |
| expect(lines[2].unscaledAscent, 11.199999809265137); |
| expect(lines[3].unscaledAscent, 11.199999809265137); |
| |
| expect(lines[0].baseline, 11.200000047683716); |
| expect(lines[1].baseline, 25.200000047683716); |
| expect(lines[2].baseline, 39.200000047683716); |
| expect(lines[3].baseline, 53.200000047683716); |
| |
| expect(lines[0].height, 14); |
| expect(lines[1].height, 14); |
| expect(lines[2].height, 14); |
| expect(lines[3].height, 14); |
| |
| expect(lines[0].width, 70); |
| expect(lines[1].width, 294); |
| expect(lines[2].width, 266); |
| expect(lines[3].width, 168); |
| |
| expect(lines[0].left, 0); |
| expect(lines[1].left, 0); |
| expect(lines[2].left, 0); |
| expect(lines[3].left, 0); |
| |
| expect(lines[0].lineNumber, 0); |
| expect(lines[1].lineNumber, 1); |
| expect(lines[2].lineNumber, 2); |
| expect(lines[3].lineNumber, 3); |
| }, skip: !isLinux); |
| } |
