[BUG] iFrame prevents scrolling parent

[mdalihusain]

Describe the bug:
When an iframe is rendered, we are unable to scroll the parent if touching the iframe. We have to scroll from the side padding to scroll the parent.
Opening this issue as requested by @erickok in #299

HTML to reproduce the issue:
<h3>YouTube iframe:</h3> <iframe src="https://google.com"></iframe> <h3>Google iframe:</h3> <iframe src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>

Html widget configuration:
Html( data: """ <h3>YouTube iframe:</h3> <iframe src="https://google.com"></iframe> <h3>Google iframe:</h3> <iframe src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe> """, // data: dumContent, onLinkTap: (link, a, b, c) { launch(link); }, style: { "body": Style( padding: EdgeInsets.symmetric( horizontal: 10), fontSize: FontSize( _fontSize, ), fontFamily: languageCode == "en" ? GoogleFonts.karla().fontFamily : GoogleFonts.rhodiumLibre() .fontFamily, color: Theme.of(context) .textTheme .caption .color, fontWeight: FontWeight.w600, margin: EdgeInsets.symmetric(vertical: 0), wordSpacing: 3), "span": Style( padding: EdgeInsets.symmetric( horizontal: 10), fontSize: FontSize( _fontSize, ), fontFamily: languageCode == "en" ? GoogleFonts.karla().fontFamily : GoogleFonts.rhodiumLibre() .fontFamily, color: Theme.of(context) .textTheme .caption .color, fontWeight: FontWeight.w600, margin: EdgeInsets.symmetric(vertical: 0), wordSpacing: 3), "p": Style( fontSize: FontSize( _fontSize, ), fontFamily: languageCode == "en" ? GoogleFonts.karla().fontFamily : GoogleFonts.rhodiumLibre() .fontFamily, color: Theme.of(context) .textTheme .caption .color, fontWeight: FontWeight.w400, margin: EdgeInsets.symmetric(vertical: 0), ), }, )

Expected behavior:
We don't want scrolling inside the iframe, but we want when someone swipes over the iframe the parent should scroll.

Device details and Flutter/Dart/flutter_html versions:
App is live on play store and all devices are facing this issue.
I am testing on Redmi Note 8 Pro - Android 11.
flutter_html - 2.1.4
Flutter - 2.2.3

[tneotia]

Unfortunately we cannot fix this bug, it is due to how android widgets are embedded in the Flutter view. This has been a long standing issue with webviews in Flutter, so we would need to wait for an official fix from their side.

[mdalihusain]

Unfortunately we cannot fix this bug, it is due to how android widgets are embedded in the Flutter view. This has been a long standing issue with webviews in Flutter, so we would need to wait for an official fix from their side.

Then how come in #318 it is said that this issue is fixed ?

[erickok]

Actually it sounds you want the opposite of #318 which fixed that scrolling in the iframe should be possible. You want the opposite.Maybe a custom rendere with IgnorePointer would work but like @tneotia says there are somelimitations to what Flutter can do here.

[erickok]

Closing as we are limited here to what Flutter can do.