Parse links

lib/ui/widgets/text_rich_content_widget.dart

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+import 'dart:ui';
+
+import 'package:comunic/utils/input_utils.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+/// Text rich content widget
+///
+/// This widget is used to parse user content (URLs, references,
+/// layout content...)
+///
+/// @author Pierre HUBERT
+
+class TextRichContentWidget extends StatelessWidget {
+  final TextSpan rootSpan;
+  final TextAlign textAlign;
+  final TextStyle style;
+
+  TextRichContentWidget(
+    String text, {
+    this.textAlign,
+    this.style,
+  })  : assert(text != null),
+
+        /// Parse content now so we won't have to do it later
+        rootSpan = TextSpan(style: style, children: _parse(text, style));
+
+  /// Parse the text and return it as a list of span elements
+  static List<TextSpan> _parse(String text, TextStyle style) {
+    if (style == null) style = TextStyle();
+
+    List<TextSpan> list = List();
+    String currString = "";
+
+    text.split("\n").forEach((f) {
+      text.split(" ").forEach((s) {
+        if (validateUrl(s)) {
+          if (currString.length > 0)
+            //"Flush" previous text
+            list.add(TextSpan(style: style, text: currString + " "));
+
+          // Add link
+          list.add(TextSpan(
+              style: style.copyWith(color: Colors.indigo),
+              text: s,
+              recognizer: TapGestureRecognizer()
+                ..onTap = () {
+                  launch(s);
+                }));
+
+          currString = "";
+        } else
+          currString += s;
+
+        currString += " ";
+      });
+
+      currString += "\n";
+    });
+
+    list.add(TextSpan(
+        style: style, text: currString.substring(0, currString.length - 2)));
+
+    return list;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return RichText(textAlign: textAlign, text: rootSpan);
+  }
+}