Revert "Skwasm Font Loading (#41246)"

This reverts commit 2393e69.

Author: eyebrowsoffire

ci/licenses_golden/licenses_flutter

@@ -1949,7 +1949,6 @@ ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/html_image_codec.dart + ../..
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/initialization.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_loader.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_typed_data.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/key_map.g.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/keyboard_binding.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/mouse_cursor.dart + ../../../flutter/LICENSE
@@ -2002,19 +2001,16 @@ ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/paragraph.
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/path.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/path_metrics.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/picture.dart + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/js_functions.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_canvas.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_fonts.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_geometry.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_memory.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_paint.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_path.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_path_metrics.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_picture.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_shaders.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_skdata.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_skstring.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_surface.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/skwasm_module.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/renderer.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/scene_builder.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/shaders.dart + ../../../flutter/LICENSE
@@ -2064,15 +2060,12 @@ ORIGIN: ../../../flutter/lib/web_ui/lib/ui_web/src/ui_web/url_strategy.dart + ..
 ORIGIN: ../../../flutter/lib/web_ui/lib/window.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/canvas.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/contour_measure.cpp + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/skwasm/data.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/export.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/skwasm/fonts.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/helpers.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/paint.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/path.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/picture.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/shaders.cpp + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/skwasm/string.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/surface.cpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/skwasm/wrappers.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/runtime/dart_isolate.cc + ../../../flutter/LICENSE
@@ -4552,7 +4545,6 @@ FILE: ../../../flutter/lib/web_ui/lib/src/engine/html_image_codec.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/initialization.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_loader.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/js_interop/js_typed_data.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/key_map.g.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/keyboard_binding.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/mouse_cursor.dart
@@ -4605,19 +4597,16 @@ FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/paragraph.da
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/path.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/path_metrics.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/picture.dart
+FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/js_functions.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_canvas.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_fonts.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_geometry.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_memory.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_paint.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_path.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_path_metrics.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_picture.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_shaders.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_skdata.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_skstring.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/raw_surface.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/raw/skwasm_module.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/renderer.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/scene_builder.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/skwasm/skwasm_impl/shaders.dart
@@ -4667,15 +4656,12 @@ FILE: ../../../flutter/lib/web_ui/lib/ui_web/src/ui_web/url_strategy.dart
 FILE: ../../../flutter/lib/web_ui/lib/window.dart
 FILE: ../../../flutter/lib/web_ui/skwasm/canvas.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/contour_measure.cpp
-FILE: ../../../flutter/lib/web_ui/skwasm/data.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/export.h
-FILE: ../../../flutter/lib/web_ui/skwasm/fonts.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/helpers.h
 FILE: ../../../flutter/lib/web_ui/skwasm/paint.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/path.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/picture.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/shaders.cpp
-FILE: ../../../flutter/lib/web_ui/skwasm/string.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/surface.cpp
 FILE: ../../../flutter/lib/web_ui/skwasm/wrappers.h
 FILE: ../../../flutter/runtime/dart_isolate.cc

lib/web_ui/lib/src/engine.dart

@@ -108,7 +108,6 @@ export 'engine/html_image_codec.dart';
 export 'engine/initialization.dart';
 export 'engine/js_interop/js_loader.dart';
 export 'engine/js_interop/js_promise.dart';
-export 'engine/js_interop/js_typed_data.dart';
 export 'engine/key_map.g.dart';
 export 'engine/keyboard_binding.dart';
 export 'engine/mouse_cursor.dart';

lib/web_ui/lib/src/engine/assets.dart

@@ -8,6 +8,20 @@ import 'dart:typed_data';
 import 'dom.dart';
 import 'util.dart';
 
+const String ahemFontFamily = 'Ahem';
+const String ahemFontUrl = '/assets/fonts/ahem.ttf';
+const String robotoFontFamily = 'Roboto';
+const String robotoTestFontUrl = '/assets/fonts/Roboto-Regular.ttf';
+
+/// The list of test fonts, in the form of font family name - font file url pairs.
+/// This list does not include embedded test fonts, which need to be loaded and
+/// registered separately in [FontCollection.debugDownloadTestFonts].
+const Map<String, String> testFontUrls = <String, String>{
+  ahemFontFamily: ahemFontUrl,
+  robotoFontFamily: robotoTestFontUrl,
+  'RobotoVariable': '/assets/fonts/RobotoSlab-VariableFont_wght.ttf',
+};
+
 /// This class downloads assets over the network.
 ///
 /// Assets are resolved relative to [assetsDir] inside the absolute base
@@ -96,3 +110,79 @@ class AssetManager {
     return (await response.payload.asByteBuffer()).asByteData();
   }
 }
+
+/// An asset manager that gives fake empty responses for assets.
+class WebOnlyMockAssetManager extends AssetManager {
+  /// Mock asset directory relative to base url.
+  String defaultAssetsDir = '';
+
+  /// Mock empty asset manifest.
+  String defaultAssetManifest = '{}';
+
+  /// Mock font manifest overridable for unit testing.
+  String defaultFontManifest = '''
+  [
+   {
+      "family":"$robotoFontFamily",
+      "fonts":[{"asset":"$robotoTestFontUrl"}]
+   },
+   {
+      "family":"$ahemFontFamily",
+      "fonts":[{"asset":"$ahemFontUrl"}]
+   }
+  ]''';
+
+  @override
+  String get assetsDir => defaultAssetsDir;
+
+  @override
+  String getAssetUrl(String asset) => asset;
+
+  @override
+  Future<HttpFetchResponse> loadAsset(String asset) async {
+    if (asset == getAssetUrl('AssetManifest.json')) {
+      return MockHttpFetchResponse(
+        url: asset,
+        status: 200,
+        payload: MockHttpFetchPayload(
+          byteBuffer: _toByteData(utf8.encode(defaultAssetManifest)).buffer,
+        ),
+      );
+    }
+    if (asset == getAssetUrl('FontManifest.json')) {
+      return MockHttpFetchResponse(
+        url: asset,
+        status: 200,
+        payload: MockHttpFetchPayload(
+          byteBuffer: _toByteData(utf8.encode(defaultFontManifest)).buffer,
+        ),
+      );
+    }
+
+    return MockHttpFetchResponse(
+      url: asset,
+      status: 404,
+    );
+  }
+
+  @override
+  Future<ByteData> load(String asset) {
+    if (asset == getAssetUrl('AssetManifest.json')) {
+      return Future<ByteData>.value(
+          _toByteData(utf8.encode(defaultAssetManifest)));
+    }
+    if (asset == getAssetUrl('FontManifest.json')) {
+      return Future<ByteData>.value(
+          _toByteData(utf8.encode(defaultFontManifest)));
+    }
+    throw HttpFetchNoPayloadError(asset, status: 404);
+  }
+
+  ByteData _toByteData(List<int> bytes) {
+    final ByteData byteData = ByteData(bytes.length);
+    for (int i = 0; i < bytes.length; i++) {
+      byteData.setUint8(i, bytes[i]);
+    }
+    return byteData;
+  }
+}

lib/web_ui/lib/src/engine/canvaskit/font_fallbacks.dart

@@ -456,7 +456,7 @@ class FallbackFontDownloadQueue {
       final Uint8List bytes = downloadedData[url]!;
       FontFallbackData.instance.registerFallbackFont(font.name, bytes);
       if (pendingFonts.isEmpty) {
-        (renderer.fontCollection as SkiaFontCollection).registerDownloadedFonts();
+        renderer.fontCollection.registerDownloadedFonts();
         sendFontChangeMessage();
       }
     }