feat: render warnings and fix text render

lib/util/render.dart

@@ -5,6 +5,8 @@ import 'package:html/dom.dart' as dom;
 import 'package:url_launcher/url_launcher.dart';
 import 'package:voyagehandbook/api/classes.dart';
 import 'package:voyagehandbook/util/styles.dart';
+import 'package:voyagehandbook/util/widgets/warning.dart';
+import 'package:html_unescape/html_unescape_small.dart';
 
 final _ignoredTags = ["style", "script"];
 
@@ -156,35 +158,12 @@ List<Widget> _renderSection(dom.Element sec, double height, double width) {
     switch (element.localName) {
       case "p":
       case "link":
-        var paraSpans = <TextSpan>[];
-        var input = element.innerHtml
-            .replaceAll(RegExp(r"<(?!(?:\/b)|(?:\/i)|b|i).+?>"), "")
-            .replaceAll("\\n", "\r");
-        var noFormatting =
-            input.split(RegExp(r"(?:<b .+?>.+?<\/b>)|<i .+?>.+?<\/i>"));
-        var needToFormat = RegExp(r"(?:<b .+?>.+?<\/b>)|<i .+?>.+?<\/i>")
-            .allMatches(input)
-            .toList();
-        for (var s in needToFormat) {
-          paraSpans.add(TextSpan(
-              text: noFormatting[
-                  needToFormat.indexOf(s)])); // add text before styled
-          var raw = s.group(0)!;
-          paraSpans.add(
-            TextSpan(
-              text: RegExp(r">(.+?)<").firstMatch(raw)!.group(1),
-              style: TextStyle(
-                fontWeight: (raw.contains("<b")) ? FontWeight.bold : null,
-                fontStyle: (raw.contains("<i")) ? FontStyle.italic : null,
-              ),
-            ),
-          ); // add styled
-        }
-        paraSpans.add(TextSpan(text: noFormatting.last)); // add last
-        out.add(RichText(
-          text: TextSpan(children: paraSpans),
+        out.add(
+          RichText(
+            text: TextSpan(children: _renderText(element.innerHtml)),
             textAlign: TextAlign.justify,
-        )); // add paragraph spans as single rich text
+          ),
+        ); // add paragraph spans as single rich text
         out.add(
           const SizedBox(
             height: 5,
@@ -234,16 +213,30 @@ List<Widget> _renderSection(dom.Element sec, double height, double width) {
             textAlign: TextAlign.center,
           ));
         }
-        out.add(const SizedBox(
+        out.add(
+          const SizedBox(
             height: 10,
-        ));
+          ),
+        );
         break;
       case "section":
         out.addAll(_renderSection(element, height, width));
         break;
+      case "div":
+        if (element.attributes["class"] != null &&
+            element.attributes["class"] == "pp_cautionbox") {
+          out.add(_renderWarning(element));
+          out.add(
+            const SizedBox(
+              height: 10,
+            ),
+          );
+        }
+        break;
       default:
         break;
     }
+    element.remove();
   }
 
   out.add(
@@ -253,3 +246,55 @@ List<Widget> _renderSection(dom.Element sec, double height, double width) {
   );
   return out;
 }
+
+// used to render warning box
+Widget _renderWarning(dom.Element element) {
+  var content = <TextSpan>[];
+  for (var tr in element
+      .getElementsByTagName("table")
+      .first
+      .getElementsByTagName("tbody")
+      .first
+      .getElementsByTagName("tr")) {
+    for (var e in tr.getElementsByTagName("td")) {
+      // Get to table data
+      content.addAll(
+        _renderText(
+          e.innerHtml.replaceAll(RegExp(r'<img.+?\/?>'), ""),
+        ),
+      );
+    }
+  }
+  return Warning(content: content);
+}
+
+/// Used to render basic text with bold and italic formatting
+List<TextSpan> _renderText(String innerHtml) {
+  var unescape = HtmlUnescape();
+  innerHtml = unescape.convert(innerHtml);
+  var content = <TextSpan>[];
+  var input = innerHtml
+      .replaceAll(RegExp(r"<(?!(?:\/b)|(?:\/i)|b|i).+?>", dotAll: true), "")
+      .replaceAll("\\n", "\r");
+  var noFormatting =
+      input.split(RegExp(r"(?:<b.*?>.+?<\/b>)|<i.*?>.+?<\/i>", dotAll: true));
+  var needToFormat = RegExp(r"(?:<b.*?>.+?<\/b>)|<i.*?>.+?<\/i>", dotAll: true)
+      .allMatches(input)
+      .toList();
+  for (var s in needToFormat) {
+    content.add(TextSpan(
+        text: noFormatting[needToFormat.indexOf(s)])); // add text before styled
+    var raw = s.group(0)!;
+    content.add(
+      TextSpan(
+        text: RegExp(r">(?!<)(.+?)<").firstMatch(raw)!.group(1),
+        style: TextStyle(
+          fontWeight: (raw.contains("<b")) ? FontWeight.bold : null,
+          fontStyle: (raw.contains("<i")) ? FontStyle.italic : null,
+        ),
+      ),
+    ); // add styled
+  }
+  content.add(TextSpan(text: noFormatting.last)); // add last
+  return content;
+}

lib/util/styles.dart

@@ -5,5 +5,5 @@ class PageStyles {
   static const h2 = TextStyle(fontSize: 22, fontWeight: FontWeight.bold);
   static const h3 = TextStyle(fontSize: 20);
   static const h5 = TextStyle(fontSize: 18);
-  static const h4 = TextStyle(fontSize: 16);
+  static const h4 = TextStyle(fontSize: 15, fontStyle: FontStyle.italic);
 }

lib/util/widgets/warning.dart

@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+
+class Warning extends StatelessWidget {
+  const Warning({super.key, required this.content});
+  final List<TextSpan> content;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      decoration: BoxDecoration(
+        border: Border.all(
+            color:
+                (MediaQuery.of(context).platformBrightness == Brightness.light)
+                    ? const Color.fromARGB(255, 151, 141, 48)
+                    : Colors.yellow,
+            width: 2),
+        borderRadius: BorderRadius.circular(8),
+        color: (MediaQuery.of(context).platformBrightness == Brightness.dark)
+            ? const Color.fromARGB(255, 151, 141, 48)
+            : Colors.yellow,
+      ),
+      child: Padding(
+        padding: const EdgeInsets.all(12.0),
+        child: Row(
+          children: [
+            const Icon(
+              Icons.warning,
+              size: 50,
+            ),
+            const SizedBox(
+              width: 10,
+            ),
+            Flexible(
+              child: RichText(
+                text: TextSpan(children: content),
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/views/pageview.dart

@@ -4,6 +4,7 @@ import 'package:voyagehandbook/api/wikimedia.dart';
 import 'package:voyagehandbook/util/drawer.dart';
 import 'package:voyagehandbook/util/render.dart';
 import 'package:voyagehandbook/util/storage.dart';
+import 'package:voyagehandbook/util/styles.dart';
 
 /// Renders a single WikiVoyage article
 class ArticleView extends StatefulWidget {
@@ -59,6 +60,7 @@ class _ArticleViewState extends State<ArticleView> {
   }
 
   void loadPage() async {
+    try {
       _content = [
         SizedBox(
           width: MediaQuery.of(context).size.width * 0.9,
@@ -69,6 +71,20 @@ class _ArticleViewState extends State<ArticleView> {
               MediaQuery.of(context).size.width),
         )
       ];
+    } catch (e) {
+      if (kDebugMode) print(e);
+      _content = [
+        const Text(
+          "Error while rendering:",
+          style: PageStyles.h1,
+        ),
+        const SizedBox(
+          height: 10,
+        ),
+        Text(e.toString())
+      ];
+    }
+
     setState(() {});
   }
 

pubspec.lock

@@ -328,6 +328,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.15.2"
+  html_unescape:
+    dependency: "direct main"
+    description:
+      name: html_unescape
+      sha256: "15362d7a18f19d7b742ef8dcb811f5fd2a2df98db9f80ea393c075189e0b61e3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
   http:
     dependency: transitive
     description:

pubspec.yaml

@@ -44,6 +44,7 @@ dependencies:
   html: ^0.15.2
   url_launcher: ^6.1.10
   cached_network_image: ^3.2.3
+  html_unescape: ^2.0.0
 
 dev_dependencies:
   flutter_test: