Merge pull request #1355 from uptech/allow-srcdoc

Add srcdoc check when building IframeWidget

Author: Sub6Resources

packages/flutter_html_iframe/lib/iframe_mobile.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
@@ -34,17 +36,26 @@ class IframeWidget extends StatelessWidget {
     final givenHeight =
         double.tryParse(extensionContext.attributes['height'] ?? "");
 
+    Uri? srcUri;
+
+    if (extensionContext.attributes['srcdoc'] != null) {
+      srcUri = Uri.dataFromString(
+        extensionContext.attributes['srcdoc'] ?? '',
+        mimeType: 'text/html',
+        encoding: Encoding.getByName('utf-8'),
+      );
+    } else {
+      srcUri = Uri.tryParse(extensionContext.attributes['src'] ?? "") ?? Uri();
+    }
+
     return SizedBox(
       width: givenWidth ?? (givenHeight ?? 150) * 2,
       height: givenHeight ?? (givenWidth ?? 300) / 2,
       child: CssBoxWidget(
         style: extensionContext.styledElement!.style,
         childIsReplaced: true,
         child: WebViewWidget(
-          controller: controller
-            ..loadRequest(
-                Uri.tryParse(extensionContext.attributes['src'] ?? "") ??
-                    Uri()),
+          controller: controller..loadRequest(srcUri),
           key: key,
           gestureRecognizers: {Factory(() => VerticalDragGestureRecognizer())},
         ),