81 lines
2.4 KiB
Dart
81 lines
2.4 KiB
Dart
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import 'package:wonders/common_libs.dart';
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class StringUtils {
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static bool isEmpty(String? s) {
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return s == null || s.trim().isEmpty;
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}
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static bool isNotEmpty(String? s) => !isEmpty(s);
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static bool isLink(String str) =>
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str.contains(RegExp(r'^(https?:\/\/)?([\w\d_-]+)\.([\w\d_\.-]+)\/?\??([^#\n\r]*)?#?([^\n\r]*)'));
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static String truncateWithEllipsis(int cutoff, String myString) {
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return (myString.length <= cutoff) ? myString : '${myString.substring(0, cutoff)}...';
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}
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static String printMap(Map<String, dynamic>? map) {
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String str = '';
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map?.forEach((key, value) => str += '$key: ${value.toString}, ');
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return str;
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}
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static Size measure(String text, TextStyle style, {int maxLines = 1, TextDirection direction = TextDirection.ltr}) {
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final TextPainter textPainter =
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TextPainter(text: TextSpan(text: text, style: style), maxLines: maxLines, textDirection: direction)
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..layout(minWidth: 0, maxWidth: double.infinity);
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return textPainter.size;
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}
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static double measureLongest(List<String> items, TextStyle style, [maxItems]) {
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double l = 0;
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if (maxItems != null && maxItems < items.length) {
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items.length = maxItems;
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}
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for (var item in items) {
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double m = StringUtils.measure(item, style).width;
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if (m > l) l = m;
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}
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return l;
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}
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/// Gracefully handles null values, and skips the suffix when null
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static String safeGet(String value, [String? suffix]) {
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return value + (value.isNotEmpty ? suffix ?? '' : '');
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}
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static String formatYr(int yr) {
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if (yr == 0) yr = 1;
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return supplant(
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$strings.yearFormat,
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{
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'{date}': yr.abs().toString(),
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'{era}': getYrSuffix(yr),
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},
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);
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}
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static String getYrSuffix(int yr) => yr < 0 ? $strings.yearBCE : $strings.yearCE;
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static String getEra(int yr) {
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if (yr <= -600) return $strings.eraPrehistory;
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if (yr <= 476) return $strings.eraClassical;
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if (yr <= 1450) return $strings.eraEarlyModern;
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return $strings.eraModern;
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}
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static String capitalize(String value) {
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return '${value[0].toUpperCase()}${value.substring(1).toLowerCase()}';
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}
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static String supplant(String value, Map<String, String> supplants) {
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return value.replaceAllMapped(RegExp(r'\{\w+\}'), (match) {
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final placeholder = match.group(0) ?? '';
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if (supplants.containsKey(placeholder)) {
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return supplants[placeholder]!;
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}
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return placeholder;
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});
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}
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}
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