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April 29, 2024 08:37
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拼音模糊匹配的方法，需要导入 pinyin 库 flutter pub add pinyin
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| import 'package:flutter/material.dart'; | |
| import 'package:pinyin/pinyin.dart'; | |
| class PinyinCompareResult { | |
| final bool isMatch; | |
| final String pinyin; | |
| final Map<int, bool> matchIndex; | |
| PinyinCompareResult({ | |
| required this.isMatch, | |
| required this.pinyin, | |
| this.matchIndex = const {}, | |
| }); | |
| List<TextSpan> buildRich({ | |
| Color matchColor = Colors.red, | |
| Color normalColor = Colors.grey, | |
| double fontSize = 13, | |
| }) { | |
| final normalStyle = TextStyle(color: normalColor, fontSize: fontSize); | |
| final matchStyle = TextStyle(color: matchColor, fontSize: fontSize); | |
| final List<TextSpan> textSpans = [ | |
| TextSpan( | |
| text: ' ', | |
| style: normalStyle, | |
| ), | |
| ]; | |
| var start = 0; | |
| matchIndex.forEach((key, value) { | |
| if (start < key) { | |
| textSpans.add( | |
| TextSpan( | |
| text: pinyin.substring(start, key), | |
| style: normalStyle, | |
| ), | |
| ); | |
| } | |
| textSpans.add( | |
| TextSpan( | |
| text: pinyin[key], | |
| style: value ? matchStyle : normalStyle, | |
| ), | |
| ); | |
| start = key + 1; | |
| }); | |
| if (start < pinyin.length) { | |
| textSpans.add( | |
| TextSpan( | |
| text: pinyin.substring(start), | |
| style: normalStyle, | |
| ), | |
| ); | |
| } | |
| return textSpans; | |
| } | |
| } | |
| class PinyinUtils { | |
| PinyinUtils._(); | |
| /// 模糊匹配的方法 | |
| static PinyinCompareResult checkPinyin({ | |
| required String text, | |
| required String inputPinyin, | |
| }) { | |
| if (text.trim().isEmpty) { | |
| return PinyinCompareResult(isMatch: false, pinyin: ''); | |
| } | |
| final textPinyin = PinyinHelper.getPinyin(text, separator: ''); | |
| if (inputPinyin.isEmpty) { | |
| return PinyinCompareResult(isMatch: false, pinyin: textPinyin); | |
| } | |
| inputPinyin = inputPinyin.toLowerCase(); | |
| final matchIndex = <int, bool>{}; | |
| if (textPinyin.contains(inputPinyin)) { | |
| final index = textPinyin.indexOf(inputPinyin); | |
| for (var i = 0; i < inputPinyin.length; i++) { | |
| matchIndex[index + i] = true; | |
| } | |
| return PinyinCompareResult( | |
| isMatch: true, pinyin: textPinyin, matchIndex: matchIndex); | |
| } | |
| // 双指针查找法，查找是否包含输入的拼音 | |
| // 比如 xiaomishouji 包含 xmsj、也包含 xmiouji ，只要顺序不错，即可匹配成功 | |
| // 被查找的拼音指针 | |
| var tPosition = 0; | |
| // 输入的拼音指针 | |
| var iPosition = 0; | |
| for (; tPosition < textPinyin.length; tPosition++) { | |
| if (textPinyin[tPosition] == inputPinyin[iPosition]) { | |
| iPosition++; | |
| matchIndex[tPosition] = true; | |
| } | |
| if (iPosition == inputPinyin.length) { | |
| return PinyinCompareResult( | |
| isMatch: true, | |
| pinyin: textPinyin, | |
| matchIndex: matchIndex, | |
| ); | |
| } | |
| } | |
| return PinyinCompareResult(isMatch: false, pinyin: textPinyin); | |
| } | |
| } |
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