Remove Libtxt and Minikin

ci/licenses_golden/excluded_files

@@ -398,7 +398,6 @@
 ../../../flutter/third_party/txt/.clang-format
 ../../../flutter/third_party/txt/.gitattributes
 ../../../flutter/third_party/txt/.gitignore
-../../../flutter/third_party/txt/PATENTS
 ../../../flutter/third_party/txt/tests
 ../../../flutter/third_party/txt/third_party/fonts
 ../../../flutter/third_party/web_locale_keymap/CHANGELOG.md

common/config.gni

@@ -14,12 +14,6 @@ declare_args() {
   # The runtime mode ("debug", "profile", "release", or "jit_release")
   flutter_runtime_mode = "debug"
 
-  # Whether to link the Skia text shaper module into the engine
-  flutter_enable_skshaper = false
-
-  # Whether to use the Skia text shaper module for all text rendering
-  flutter_always_use_skshaper = false
-
   # Whether to use a prebuilt Dart SDK instead of building one.
   flutter_prebuilt_dart_sdk = false
 

common/settings.h

@@ -205,9 +205,6 @@ struct Settings {
   // manager before creating the engine.
   bool prefetched_default_font_manager = false;
 
-  // Selects the SkParagraph implementation of the text layout engine.
-  bool enable_skparagraph = false;
-
   // Enable the rendering of colors outside of the sRGB gamut.
   bool enable_wide_gamut = false;
 

lib/ui/BUILD.gn

@@ -182,12 +182,6 @@ source_set("ui") {
   if (!defined(defines)) {
     defines = []
   }
-  if (flutter_enable_skshaper) {
-    defines += [ "FLUTTER_ENABLE_SKSHAPER" ]
-  }
-  if (flutter_always_use_skshaper) {
-    defines += [ "FLUTTER_ALWAYS_USE_SKSHAPER" ]
-  }
   if (is_win) {
     # Required for M_PI and others.
     defines += [ "_USE_MATH_DEFINES" ]

lib/ui/text/paragraph.cc

@@ -65,13 +65,8 @@ void Paragraph::paint(Canvas* canvas, double x, double y) {
   }
 
   DisplayListBuilder* builder = canvas->builder();
-  if (builder && m_paragraph->Paint(builder, x, y)) {
-    return;
-  }
-  // Fall back to SkCanvas if painting to DisplayListBuilder is not supported.
-  SkCanvas* sk_canvas = canvas->canvas();
-  if (sk_canvas) {
-    m_paragraph->Paint(sk_canvas, x, y);
+  if (builder) {
+    m_paragraph->Paint(builder, x, y);
   }
 }
 

lib/ui/text/paragraph_builder.cc

@@ -297,23 +297,8 @@ ParagraphBuilder::ParagraphBuilder(
                                         ->client()
                                         ->GetFontCollection();
 
-  typedef std::unique_ptr<txt::ParagraphBuilder> (*ParagraphBuilderFactory)(
-      const txt::ParagraphStyle& style,
-      std::shared_ptr<txt::FontCollection> font_collection);
-  ParagraphBuilderFactory factory = txt::ParagraphBuilder::CreateTxtBuilder;
-
-#if FLUTTER_ENABLE_SKSHAPER
-#if FLUTTER_ALWAYS_USE_SKSHAPER
-  bool enable_skparagraph = true;
-#else
-  bool enable_skparagraph = UIDartState::Current()->enable_skparagraph();
-#endif
-  if (enable_skparagraph) {
-    factory = txt::ParagraphBuilder::CreateSkiaBuilder;
-  }
-#endif  // FLUTTER_ENABLE_SKSHAPER
-
-  m_paragraphBuilder = factory(style, font_collection.GetFontCollection());
+  m_paragraphBuilder = txt::ParagraphBuilder::CreateSkiaBuilder(
+      style, font_collection.GetFontCollection());
 }
 
 ParagraphBuilder::~ParagraphBuilder() = default;

lib/ui/ui_dart_state.cc

@@ -60,7 +60,6 @@ UIDartState::UIDartState(
     LogMessageCallback log_message_callback,
     std::shared_ptr<IsolateNameServer> isolate_name_server,
     bool is_root_isolate,
-    bool enable_skparagraph,
     const UIDartState::Context& context)
     : add_callback_(std::move(add_callback)),
       remove_callback_(std::move(remove_callback)),
@@ -69,7 +68,6 @@ UIDartState::UIDartState(
       unhandled_exception_callback_(std::move(unhandled_exception_callback)),
       log_message_callback_(std::move(log_message_callback)),
       isolate_name_server_(std::move(isolate_name_server)),
-      enable_skparagraph_(enable_skparagraph),
       context_(context) {
   AddOrRemoveTaskObserver(true /* add */);
 }
@@ -234,10 +232,6 @@ void UIDartState::LogMessage(const std::string& tag,
   }
 }
 
-bool UIDartState::enable_skparagraph() const {
-  return enable_skparagraph_;
-}
-
 Dart_Handle UIDartState::HandlePlatformMessage(
     std::unique_ptr<PlatformMessage> message) {
   if (platform_configuration_) {

lib/ui/ui_dart_state.h

@@ -153,8 +153,6 @@ class UIDartState : public tonic::DartState {
   // @param[in]  message  The message to be logged.
   void LogMessage(const std::string& tag, const std::string& message) const;
 
-  bool enable_skparagraph() const;
-
   template <class T>
   static flutter::SkiaGPUObject<T> CreateGPUObject(sk_sp<T> object) {
     if (!object) {
@@ -185,7 +183,6 @@ class UIDartState : public tonic::DartState {
               LogMessageCallback log_message_callback,
               std::shared_ptr<IsolateNameServer> isolate_name_server,
               bool is_root_isolate_,
-              bool enable_skparagraph,
               const UIDartState::Context& context);
 
   ~UIDartState() override;
@@ -210,7 +207,6 @@ class UIDartState : public tonic::DartState {
   UnhandledExceptionCallback unhandled_exception_callback_;
   LogMessageCallback log_message_callback_;
   const std::shared_ptr<IsolateNameServer> isolate_name_server_;
-  const bool enable_skparagraph_;
   UIDartState::Context context_;
 
   void AddOrRemoveTaskObserver(bool add);

runtime/dart_isolate.cc

@@ -284,7 +284,6 @@ DartIsolate::DartIsolate(const Settings& settings,
                   settings.log_message_callback,
                   DartVMRef::GetIsolateNameServer(),
                   is_root_isolate,
-                  settings.enable_skparagraph,
                   context),
       may_insecurely_connect_to_all_domains_(
           settings.may_insecurely_connect_to_all_domains),

shell/common/shell_unittests.cc

@@ -1425,36 +1425,6 @@ TEST_F(ShellTest, ReportTimingsIsCalledImmediatelyAfterTheFirstFrame) {
   ASSERT_EQ(timestamps.size(), FrameTiming::kCount);
 }
 
-TEST_F(ShellTest, ReloadSystemFonts) {
-  auto settings = CreateSettingsForFixture();
-
-  fml::MessageLoop::EnsureInitializedForCurrentThread();
-  auto task_runner = fml::MessageLoop::GetCurrent().GetTaskRunner();
-  TaskRunners task_runners("test", task_runner, task_runner, task_runner,
-                           task_runner);
-  auto shell = CreateShell(settings, task_runners);
-
-  auto fontCollection = GetFontCollection(shell.get());
-  std::vector<std::string> families(1, "Robotofake");
-  auto font =
-      fontCollection->GetMinikinFontCollectionForFamilies(families, "en");
-  if (font == nullptr) {
-    // The system does not have default font. Aborts this test.
-    return;
-  }
-  unsigned int id = font->getId();
-  // The result should be cached.
-  font = fontCollection->GetMinikinFontCollectionForFamilies(families, "en");
-  ASSERT_EQ(font->getId(), id);
-  bool result = shell->ReloadSystemFonts();
-
-  // The cache is cleared, and FontCollection will be assigned a new id.
-  font = fontCollection->GetMinikinFontCollectionForFamilies(families, "en");
-  ASSERT_NE(font->getId(), id);
-  ASSERT_TRUE(result);
-  shell.reset();
-}
-
 TEST_F(ShellTest, WaitForFirstFrame) {
   auto settings = CreateSettingsForFixture();
   std::unique_ptr<Shell> shell = CreateShell(settings);

shell/common/switches.cc

@@ -443,10 +443,6 @@ Settings SettingsFromCommandLine(const fml::CommandLine& command_line) {
   settings.use_asset_fonts =
       !command_line.HasOption(FlagForSwitch(Switch::DisableAssetFonts));
 
-  std::string enable_skparagraph = command_line.GetOptionValueWithDefault(
-      FlagForSwitch(Switch::EnableSkParagraph), "");
-  settings.enable_skparagraph = enable_skparagraph != "false";
-
   settings.enable_impeller =
       command_line.HasOption(FlagForSwitch(Switch::EnableImpeller));
 

shell/common/switches.h

@@ -257,9 +257,6 @@ DEF_SWITCH(OldGenHeapSize,
 DEF_SWITCH(ResourceCacheMaxBytesThreshold,
            "resource-cache-max-bytes-threshold",
            "The max bytes threshold of resource cache, or 0 for unlimited.")
-DEF_SWITCH(EnableSkParagraph,
-           "enable-skparagraph",
-           "Selects the SkParagraph implementation of the text layout engine.")
 DEF_SWITCH(EnableImpeller,
            "enable-impeller",
            "Enable the Impeller renderer on supported platforms. Ignored if "

shell/platform/android/io/flutter/embedding/engine/loader/FlutterLoader.java

@@ -39,8 +39,6 @@ public class FlutterLoader {
 
   private static final String OLD_GEN_HEAP_SIZE_META_DATA_KEY =
       "io.flutter.embedding.android.OldGenHeapSize";
-  private static final String ENABLE_SKPARAGRAPH_META_DATA_KEY =
-      "io.flutter.embedding.android.EnableSkParagraph";
   private static final String ENABLE_IMPELLER_META_DATA_KEY =
       "io.flutter.embedding.android.EnableImpeller";
 
@@ -318,10 +316,6 @@ public void ensureInitializationComplete(
 
       shellArgs.add("--prefetched-default-font-manager");
 
-      boolean enableSkParagraph =
-          metaData == null || metaData.getBoolean(ENABLE_SKPARAGRAPH_META_DATA_KEY, true);
-      shellArgs.add("--enable-skparagraph=" + enableSkParagraph);
-
       if (metaData != null && metaData.getBoolean(ENABLE_IMPELLER_META_DATA_KEY, false)) {
         shellArgs.add("--enable-impeller");
       }

shell/platform/android/test/io/flutter/embedding/engine/loader/FlutterLoaderTest.java

@@ -197,44 +197,6 @@ public void itSetsEnableImpellerFromMetaData() {
     assertTrue(arguments.contains(enableImpellerArg));
   }
 
-  @Test
-  public void itSetsEnableSkParagraphByDefault() {
-    // SkParagraph is enabled by default
-    FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
-    FlutterLoader flutterLoader = new FlutterLoader(mockFlutterJNI);
-    FlutterLoader.Settings settings = new FlutterLoader.Settings();
-    flutterLoader.startInitialization(ctx, settings);
-    flutterLoader.ensureInitializationComplete(ctx, null);
-    shadowOf(getMainLooper()).idle();
-
-    ArgumentCaptor<String[]> shellArgsCaptor = ArgumentCaptor.forClass(String[].class);
-    verify(mockFlutterJNI, times(1))
-        .init(eq(ctx), shellArgsCaptor.capture(), anyString(), anyString(), anyString(), anyLong());
-    List<String> arguments = Arrays.asList(shellArgsCaptor.getValue());
-    assertTrue(arguments.contains("--enable-skparagraph=true"));
-  }
-
-  @Test
-  public void itSetsEnableSkParagraphFromMetaData() {
-    // SkParagraph can be disabled using metadata.
-    FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
-    FlutterLoader flutterLoader = new FlutterLoader(mockFlutterJNI);
-    Bundle metaData = new Bundle();
-    metaData.putBoolean("io.flutter.embedding.android.EnableSkParagraph", false);
-    ctx.getApplicationInfo().metaData = metaData;
-
-    FlutterLoader.Settings settings = new FlutterLoader.Settings();
-    flutterLoader.startInitialization(ctx, settings);
-    flutterLoader.ensureInitializationComplete(ctx, null);
-    shadowOf(getMainLooper()).idle();
-
-    ArgumentCaptor<String[]> shellArgsCaptor = ArgumentCaptor.forClass(String[].class);
-    verify(mockFlutterJNI, times(1))
-        .init(eq(ctx), shellArgsCaptor.capture(), anyString(), anyString(), anyString(), anyLong());
-    List<String> arguments = Arrays.asList(shellArgsCaptor.getValue());
-    assertTrue(arguments.contains("--enable-skparagraph=false"));
-  }
-
   @Test
   @TargetApi(23)
   @Config(sdk = 23)

shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm

@@ -156,10 +156,6 @@
   settings.may_insecurely_connect_to_all_domains = true;
   settings.domain_network_policy = "";
 
-  // SkParagraph text layout library
-  NSNumber* enableSkParagraph = [mainBundle objectForInfoDictionaryKey:@"FLTEnableSkParagraph"];
-  settings.enable_skparagraph = (enableSkParagraph != nil) ? enableSkParagraph.boolValue : true;
-
   // Whether to enable Impeller.
   NSNumber* nsEnableWideGamut = [mainBundle objectForInfoDictionaryKey:@"FLTEnableWideGamut"];
   // TODO(gaaclarke): Make this value `on` by default (pending memory audit).

shell/platform/fuchsia/flutter/platform_view.cc

@@ -657,7 +657,7 @@ bool PlatformView::HandleFuchsiaShaderWarmupChannelPlatformMessage(
   }
 
   auto completion_callback = [response =
-                                  message->response()](uint num_successes) {
+                                  message->response()](uint32_t num_successes) {
     std::ostringstream result_stream;
     result_stream << "[" << num_successes << "]";