119 lines
3.7 KiB
Dart
119 lines
3.7 KiB
Dart
// Originally from linkify: https://github.com/Cretezy/linkify/blob/dfb3e43b0e56452bad584ddb0bf9b73d8db0589f/lib/src/url.dart
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//
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// Removed handling of `removeWWW` and `humanize`.
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// Removed auto-appending of `http(s)://` to the readable url
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//
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// MIT License
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//
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// Copyright (c) 2019 Charles-William Crete
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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import 'linkify.dart';
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final _urlRegex = RegExp(
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r'^(.*?)((?:https?:\/\/|www\.)[^\s/$.?#].[^\s]*)',
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caseSensitive: false,
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dotAll: true,
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);
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final _looseUrlRegex = RegExp(
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r'^(.*?)((https?:\/\/)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,4}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*))',
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caseSensitive: false,
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dotAll: true,
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);
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final _protocolIdentifierRegex = RegExp(
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r'^(https?:\/\/)',
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caseSensitive: false,
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);
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class UrlLinkifier extends Linkifier {
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const UrlLinkifier();
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@override
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List<LinkifyElement> parse(elements, options) {
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final list = <LinkifyElement>[];
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elements.forEach((element) {
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if (element is TextElement) {
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var match = options.looseUrl ? _looseUrlRegex.firstMatch(element.text) : _urlRegex.firstMatch(element.text);
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if (match == null) {
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list.add(element);
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} else {
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final text = element.text.replaceFirst(match.group(0)!, '');
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if (match.group(1)?.isNotEmpty == true) {
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list.add(TextElement(match.group(1)!));
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}
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if (match.group(2)?.isNotEmpty == true) {
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var originalUrl = match.group(2)!;
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String? end;
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if ((options.excludeLastPeriod) && originalUrl[originalUrl.length - 1] == ".") {
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end = ".";
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originalUrl = originalUrl.substring(0, originalUrl.length - 1);
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}
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var url = originalUrl;
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// If protocol has not been specified then append a protocol
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// to the start of the URL so that it can be opened...
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if (!url.startsWith("https://") && !url.startsWith("http://")) {
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url = "https://" + url;
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}
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list.add(UrlElement(url, originalUrl));
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if (end != null) {
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list.add(TextElement(end));
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}
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}
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if (text.isNotEmpty) {
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list.addAll(parse([TextElement(text)], options));
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}
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}
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} else {
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list.add(element);
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}
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});
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return list;
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}
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}
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/// Represents an element containing a link
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class UrlElement extends LinkableElement {
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UrlElement(String url, [String? text]) : super(text, url);
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@override
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String toString() {
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return "LinkElement: '$url' ($text)";
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}
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@override
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bool operator ==(other) => equals(other);
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@override
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bool equals(other) => other is UrlElement && super.equals(other);
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}
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