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iamSahdeep / seo_renderer

A Flutter Web Plugin to display Text Widget as Html for SEO purpose
MIT License
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TextRenderer Widget throws "Unexpected null value." at using inside a Row or Column #13

Closed weth767 closed 2 years ago

weth767 commented 2 years ago

I'm trying to use TextRenderer inside to any Rows and Columns and always throws me error. But, the showed error don't say me what the problem, because, it's throwed a default error. Any observations:

Example code:

Row(
  mainAxisAlignment: MainAxisAlignment.start,
  children: [
  InkWell(
    onTap: () {
      goToHomePage();
    },
    child: Container(
      width: 500,
      height: 200,
      child: TextRenderer(
        text: "Choose more products",
        style: SeoUtils.getTextRendererStyleByFontSize(14),
        child: Text(
          "Choose more products",
          style: TextStyle(
            fontSize: 14,
            color: const Color(0xFF3B3B3B),
            decoration: TextDecoration.underline,
            decorationColor: const Color(0xFF3B3B3B),
            fontWeight: FontWeight.bold,
          ),
        ),
      ),
    ),
  ),
  Container(child: Icon(Icons.add),),
  ],
  );

Follow below stack errors:

════════ Exception caught by widgets library ═══════════════════════════════════ The following TypeErrorImpl was thrown building TextRenderer(dirty, dependencies: [_ModalScopeStatus], state: _TextRendererState#a019f): Unexpected null value.

The relevant error-causing widget was TextRenderer When the exception was thrown, this was the stack C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddcruntime/errors.dart 251:49 throw C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 528:63 nullCheck packages/seo_renderer/helpers/robot_detector_web.dart 20:68 detected packages/seo_renderer/renderers/text_renderer/text_renderer_web.dart 94:24 build packages/flutter/src/widgets/framework.dart 4870:27 build packages/flutter/src/widgets/framework.dart 4754:15 performRebuild packages/flutter/src/widgets/framework.dart 4928:11 performRebuild packages/flutter/src/widgets/framework.dart 4477:5 rebuild packages/flutter/src/widgets/framework.dart 4735:5 [_firstBuild] packages/flutter/src/widgets/framework.dart 4919:11 [_firstBuild] packages/flutter/src/widgets/framework.dart 4729:5 mount packages/flutter/src/widgets/framework.dart 3790:13 inflateWidget packages/flutter/src/widgets/framework.dart 3540:18 updateChild packages/flutter/src/widgets/framework.dart 6284:14 mount packages/flutter/src/widgets/framework.dart 3790:13 inflateWidget packages/flutter/src/widgets/framework.dart 3540:18 updateChild packages/flutter/src/widgets/framework.dart 4780:16 performRebuild packages/flutter/src/widgets/framework.dart 4477:5 rebuild packages/flutter/src/widgets/framework.dart 4735:5 [_firstBuild] packages/flutter/src/widgets/framework.dart 4729:5 mount packages/flutter/src/widgets/framework.dart 3790:13 inflateWidget packages/flutter/src/widgets/framework.dart 3540:18 updateChild packages/flutter/src/widgets/framework.dart 6284:14 mount packages/flutter/src/widgets/framework.dart 3790:13 inflateWidget packages/flutter/src/widgets/framework.dart 3540:18 updateChild packages/flutter/src/widgets/framework.dart 4780:16 performRebuild packages/flutter/src/widgets/framework.dart 4928:11 performRebuild 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buildScope packages/flutter/src/widgets/sliver.dart 1221:5 createChild packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 349:23 packages/flutter/src/rendering/object.dart 1997:59 packages/flutter/src/rendering/object.dart 918:15 [_enableMutationsToDirtySubtrees] packages/flutter/src/rendering/object.dart 1997:7 invokeLayoutCallback packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 338:5 [_createOrObtainChild] packages/flutter/src/rendering/sliver_multi_box_adaptor.dart 484:5 insertAndLayoutChild packages/flutter/src/rendering/sliver_list.dart 239:19 advance packages/flutter/src/rendering/sliver_list.dart 281:12 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/viewport.dart 510:12 layoutChildSequence packages/flutter/src/rendering/viewport.dart 1580:12 [_attemptLayout] packages/flutter/src/rendering/viewport.dart 1489:20 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/custom_paint.dart 545:11 performLayout 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1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/proxy_box.dart 1376:11 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/proxy_box.dart 3430:13 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/widgets/overlay.dart 751:14 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/widgets/layout_builder.dart 321:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/custom_layout.dart 171:10 layoutChild packages/flutter/src/material/scaffold.dart 1005:7 performLayout packages/flutter/src/rendering/custom_layout.dart 240:7 [_callPerformLayout] packages/flutter/src/rendering/custom_layout.dart 403:14 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/proxy_box.dart 1376:11 performLayout packages/flutter/src/rendering/object.dart 1887:7 layout packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout packages/flutter/src/rendering/object.dart 1731:7 [_layoutWithoutResize] packages/flutter/src/rendering/object.dart 887:17 flushLayout packages/flutter/src/rendering/binding.dart 497:19 drawFrame packages/flutter/src/widgets/binding.dart 883:13 drawFrame packages/flutter/src/rendering/binding.dart 363:5 [_handlePersistentFrameCallback] packages/flutter/src/scheduler/binding.dart 1144:15 [_invokeFrameCallback] packages/flutter/src/scheduler/binding.dart 1081:9 handleDrawFrame packages/flutter/src/scheduler/binding.dart 995:5 [_handleDrawFrame] C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/platform_dispatcher.dart 1011:13 invoke C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/platform_dispatcher.dart 159:5 invokeOnDrawFrame C:/b/s/w/ir/cache/builder/src/out/host_debug/flutter_web_sdk/lib/_engine/engine/initialization.dart 128:45 ════════════════════════════════════════════════════════════════════════════════

iamSahdeep commented 2 years ago

Hi @weth767 Seems like It can't find RobotDetector in the widget tree.

Have you added RobotDetector Widget like this? There are some changes in usage for v0.5.0

runApp(
  RobotDetector(
    debug: true, // you can set true to enable robot mode
    child: MaterialApp(
      home: MyApp(),
      navigatorObservers: [seoRouteObserver],
    ),
  ),
);

caused by : context.findAncestorStateOfType<_RobotDetectorState>()!._detected;

weth767 commented 2 years ago

@iamSahdeep This was the cause. My problem was that RobotDetector it was added in ModularApp and not in MaterialApp, because i used Flutter Modular. Thanks for your help.