basic text test

adding a basic text test to get to the bottom of text not working

Diffs=
66e234066 basic text test (#5718)
b69ae1312 Lift tess decoders into a static lib (#5709)

Co-authored-by: Maxwell Talbot <talbot.maxwell@gmail.com>

.rive_head

@@ -1 +1 @@
-913760d979f6ab9b54ac510726649dc0980f6b15
+66e234066f31e22208005a4583b4f423a86c4281

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.11.9
+
+- Fix issue showing text when the default font is not available at `assets/fonts/Inter-Regular.ttf`. We will set first valid font we encounter in a rive file as default font instead.
+
 ## 0.11.8
 
 - Fix text origin changing updating text offset.

example/lib/basic_text.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+import 'package:rive/rive.dart';
+
+/// Basic example playing a Rive animation from a packaged asset.
+class BasicText extends StatelessWidget {
+  const BasicText({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Basic Text'),
+      ),
+      body: const Center(
+        child: RiveAnimation.asset(
+          'assets/text_flutter.riv',
+          fit: BoxFit.cover,
+        ),
+      ),
+    );
+  }
+}

example/lib/main.dart

@@ -15,6 +15,7 @@ import 'package:rive_example/simple_machine_listener.dart';
 import 'package:rive_example/simple_state_machine.dart';
 import 'package:rive_example/skinning_demo.dart';
 import 'package:rive_example/state_machine_skills.dart';
+import 'package:rive_example/basic_text.dart';
 
 void main() => runApp(
       MaterialApp(
@@ -54,6 +55,7 @@ class _RiveExampleAppState extends State<RiveExampleApp> {
     const _Page('State Machine with Listener', StateMachineListener()),
     const _Page('Skinning Demo', SkinningDemo()),
     const _Page('Animation Carousel', AnimationCarousel()),
+    const _Page('Basic Text', BasicText()),
     const _Page('Custom Asset Loading', CustomAssetLoading()),
     const _Page('Custom Cached Asset Loading', CustomCachedAssetLoading()),
   ];

lib/src/asset_loader.dart

@@ -1,7 +1,7 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 import 'package:http/http.dart' as http;
 import 'package:rive/src/asset.dart';
+import 'package:rive/src/debug.dart';
 import 'package:rive/src/rive_core/assets/file_asset.dart';
 import 'package:rive/src/utilities/utilities.dart';
 
@@ -49,13 +49,11 @@ class CDNAssetLoader extends FileAssetLoader {
           Uint8List.view(res.bodyBytes.buffer),
         );
       } on Exception catch (e) {
-        // only print in debug
-        assert(() {
-          debugPrint('''Unable to parse response ${asset.runtimeType}.
+        printDebugMessage(
+          '''Unable to parse response ${asset.runtimeType}.
   - Url: $url
-  - Exception: $e''');
-          return true;
-        }());
+  - Exception: $e''',
+        );
         return false;
       }
 

lib/src/core/importers/file_asset_importer.dart

@@ -1,5 +1,6 @@
 import 'package:rive/src/asset_loader.dart';
 import 'package:rive/src/core/core.dart';
+import 'package:rive/src/debug.dart';
 import 'package:rive/src/rive_core/assets/file_asset.dart';
 import 'package:rive/src/rive_core/assets/file_asset_contents.dart';
 
@@ -35,15 +36,13 @@ class FileAssetImporter extends ImportStackObject {
       // try to get them out of band
       assetLoader?.load(fileAsset).then((loaded) {
         // TODO: improve error logging
-        // Only print if in debug mode.
-        assert(() {
-          if (!loaded) {
-            debugPrint('''Rive asset (${fileAsset.name}) was not able to load:
+        if (!loaded) {
+          printDebugMessage(
+            '''Rive asset (${fileAsset.name}) was not able to load:
   - Unique file name: ${fileAsset.uniqueFilename}
-  - Asset id: ${fileAsset.id}''');
-          }
-          return true;
-        }());
+  - Asset id: ${fileAsset.id}''',
+          );
+        }
       });
     }
     return super.resolve();

lib/src/debug.dart

@@ -0,0 +1,9 @@
+import 'package:flutter/foundation.dart';
+
+/// Print a message only when running in debug.
+void printDebugMessage(String message) {
+  assert(() {
+    debugPrint(message);
+    return true;
+  }());
+}

lib/src/rive_core/text/text.dart

@@ -3,6 +3,7 @@ import 'dart:typed_data';
 import 'dart:ui';
 
 import 'package:flutter/services.dart';
+import 'package:rive/src/debug.dart';
 import 'package:rive/src/generated/text/text_base.dart';
 import 'package:rive/src/rive_core/component_dirt.dart';
 import 'package:rive/src/rive_core/text/styled_text.dart';
@@ -77,6 +78,15 @@ class Text extends TextBase with TextStyleContainer {
 
   int get unicharCount => _unicharCount;
 
+  Font? getFirstAvailableFont() {
+    for (final run in runs) {
+      if (run.style?.font != null) {
+        return run.style?.font;
+      }
+    }
+    return null;
+  }
+
   StyledText makeStyled(
     Font defaultFont, {
     bool forEditing = false,
@@ -179,7 +189,6 @@ class Text extends TextBase with TextStyleContainer {
     _syncRuns();
   }
 
-
   Mat2D get originTransform => Mat2D.multiply(
         Mat2D(),
         worldTransform,
@@ -472,6 +481,9 @@ class Text extends TextBase with TextStyleContainer {
 
       return;
     }
+
+    // Question (max): is it safer to simply skip computing Shape if we
+    // have no default font?
     assert(_defaultFont != null);
     var defaultFont = _defaultFont!;
     _modifierShape?.dispose();
@@ -539,6 +551,11 @@ class Text extends TextBase with TextStyleContainer {
           _defaultFont = Font.decode(fontAsset.buffer.asUint8List());
           // Reshape now that we have font.
           markShapeDirty();
+        }).onError((error, stackTrace) {
+          _defaultFont = getFirstAvailableFont();
+          if (_defaultFont != null) {
+            markShapeDirty();
+          }
         });
       } else {
         computeShape();