Reland "Initial integration of libtxt with Flutter alongside Blink." (#3793)

* Transition to Hybrid lib/txt and blink text system.

BUILD.gn

@@ -8,6 +8,7 @@ group("flutter") {
   deps = [
     "//flutter/lib/snapshot:generate_snapshot_bin",
     "//flutter/sky",
+    "//lib/txt",
   ]
 
   if (is_fuchsia) {
@@ -30,6 +31,8 @@ group("flutter") {
       "//flutter/sky/engine/wtf:wtf_unittests",
       "//flutter/synchronization:synchronization_unittests",
       "//lib/ftl:ftl_unittests",
+      "//lib/txt/examples:txt_example($host_toolchain)",
+      "//lib/txt/tests($host_toolchain)",  # txt_unittests
     ]
   }
 }

DEPS

@@ -71,6 +71,9 @@ deps = {
   'src/lib/zip':
    Var('fuchsia_git') + '/zip' + '@' + '92dc87ca645fe8e9f5151ef6dac86d8311a7222f',
 
+  'src/lib/txt':
+   Var('fuchsia_git') + '/txt' + '@' + 'b44e28c2fd75d7d4b9dcc862bb2c01a090bb53e1',
+
   'src/third_party/gtest':
    Var('fuchsia_git') + '/third_party/gtest' + '@' + 'c00f82917331efbbd27124b537e4ccc915a02b72',
 

common/settings.h

@@ -27,6 +27,7 @@ struct Settings {
   bool use_test_fonts = false;
   bool dart_non_checked_mode = false;
   bool enable_software_rendering = false;
+  bool using_blink = true;
   std::string aot_snapshot_path;
   std::string aot_vm_snapshot_data_filename;
   std::string aot_vm_snapshot_instr_filename;

lib/ui/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 source_set("ui") {
+  
   sources = [
     "compositing/scene.cc",
     "compositing/scene.h",
@@ -55,6 +56,12 @@ source_set("ui") {
     "text/paragraph.h",
     "text/paragraph_builder.cc",
     "text/paragraph_builder.h",
+    "text/paragraph_impl.cc",
+    "text/paragraph_impl.h",
+    "text/paragraph_impl_blink.cc",
+    "text/paragraph_impl_blink.h",
+    "text/paragraph_impl_txt.cc",
+    "text/paragraph_impl_txt.h",
     "text/text_box.cc",
     "text/text_box.h",
     "ui_dart_state.cc",
@@ -83,5 +90,6 @@ source_set("ui") {
     "//lib/tonic",
     "//third_party/skia",
     "//third_party/skia:gpu",
+    "//lib/txt",
   ]
 }

lib/ui/text/paragraph.cc

@@ -4,14 +4,16 @@
 
 #include "flutter/lib/ui/text/paragraph.h"
 
+#include "flutter/common/settings.h"
 #include "flutter/common/threads.h"
 #include "flutter/sky/engine/core/rendering/PaintInfo.h"
-#include "flutter/sky/engine/core/rendering/RenderText.h"
 #include "flutter/sky/engine/core/rendering/RenderParagraph.h"
+#include "flutter/sky/engine/core/rendering/RenderText.h"
 #include "flutter/sky/engine/core/rendering/style/RenderStyle.h"
 #include "flutter/sky/engine/platform/fonts/FontCache.h"
 #include "flutter/sky/engine/platform/graphics/GraphicsContext.h"
 #include "flutter/sky/engine/platform/text/TextBoundaries.h"
+#include "flutter/sky/engine/wtf/PassOwnPtr.h"
 #include "lib/ftl/tasks/task_runner.h"
 #include "lib/tonic/converter/dart_converter.h"
 #include "lib/tonic/dart_args.h"
@@ -31,7 +33,7 @@ IMPLEMENT_WRAPPERTYPEINFO(ui, Paragraph);
   V(Paragraph, maxIntrinsicWidth)   \
   V(Paragraph, alphabeticBaseline)  \
   V(Paragraph, ideographicBaseline) \
-  V(Paragraph, didExceedMaxLines) \
+  V(Paragraph, didExceedMaxLines)   \
   V(Paragraph, layout)              \
   V(Paragraph, paint)               \
   V(Paragraph, getWordBoundary)     \
@@ -41,155 +43,65 @@ IMPLEMENT_WRAPPERTYPEINFO(ui, Paragraph);
 DART_BIND_ALL(Paragraph, FOR_EACH_BINDING)
 
 Paragraph::Paragraph(PassOwnPtr<RenderView> renderView)
-    : m_renderView(renderView) {}
+    : m_paragraphImpl(std::make_unique<ParagraphImplBlink>(renderView)) {}
+
+Paragraph::Paragraph(std::unique_ptr<txt::Paragraph> paragraph)
+    : m_paragraphImpl(
+          std::make_unique<ParagraphImplTxt>(std::move(paragraph))) {}
 
 Paragraph::~Paragraph() {
   if (m_renderView) {
     RenderView* renderView = m_renderView.leakPtr();
-    Threads::UI()->PostTask(
-        [renderView]() { renderView->destroy(); });
+    Threads::UI()->PostTask([renderView]() { renderView->destroy(); });
   }
 }
 
 double Paragraph::width() {
-  return firstChildBox()->width();
+  return m_paragraphImpl->width();
 }
 
 double Paragraph::height() {
-  return firstChildBox()->height();
+  return m_paragraphImpl->height();
 }
 
 double Paragraph::minIntrinsicWidth() {
-  return firstChildBox()->minPreferredLogicalWidth();
+  return m_paragraphImpl->minIntrinsicWidth();
 }
 
 double Paragraph::maxIntrinsicWidth() {
-  return firstChildBox()->maxPreferredLogicalWidth();
+  return m_paragraphImpl->maxIntrinsicWidth();
 }
 
 double Paragraph::alphabeticBaseline() {
-  return firstChildBox()->firstLineBoxBaseline(
-      FontBaselineOrAuto(AlphabeticBaseline));
+  return m_paragraphImpl->alphabeticBaseline();
 }
 
 double Paragraph::ideographicBaseline() {
-  return firstChildBox()->firstLineBoxBaseline(
-      FontBaselineOrAuto(IdeographicBaseline));
+  return m_paragraphImpl->ideographicBaseline();
 }
 
 bool Paragraph::didExceedMaxLines() {
-  RenderBox* box = firstChildBox();
-  ASSERT(box->isRenderParagraph());
-  RenderParagraph* paragraph = static_cast<RenderParagraph*>(box);
-  return paragraph->didExceedMaxLines();
+  return m_paragraphImpl->didExceedMaxLines();
 }
 
 void Paragraph::layout(double width) {
-  FontCachePurgePreventer fontCachePurgePreventer;
-
-  int maxWidth = LayoutUnit(width);  // Handles infinity properly.
-  m_renderView->setFrameViewSize(IntSize(maxWidth, intMaxForLayoutUnit));
-  m_renderView->layout();
+  m_paragraphImpl->layout(width);
 }
 
 void Paragraph::paint(Canvas* canvas, double x, double y) {
-  SkCanvas* skCanvas = canvas->canvas();
-  if (!skCanvas)
-    return;
-
-  FontCachePurgePreventer fontCachePurgePreventer;
-
-  // Very simplified painting to allow painting an arbitrary (layer-less)
-  // subtree.
-  RenderBox* box = firstChildBox();
-  skCanvas->translate(x, y);
-
-  GraphicsContext context(skCanvas);
-  Vector<RenderBox*> layers;
-  LayoutRect bounds = box->absoluteBoundingBoxRect();
-  FTL_DCHECK(bounds.x() == 0 && bounds.y() == 0);
-  PaintInfo paintInfo(&context, enclosingIntRect(bounds), box);
-  box->paint(paintInfo, LayoutPoint(), layers);
-  // Note we're ignoring any layers encountered.
-  // TODO(abarth): Remove the concept of RenderLayers.
-
-  skCanvas->translate(-x, -y);
+  m_paragraphImpl->paint(canvas, x, y);
 }
 
 std::vector<TextBox> Paragraph::getRectsForRange(unsigned start, unsigned end) {
-  if (end <= start || start == end)
-    return std::vector<TextBox>();
-
-  unsigned offset = 0;
-  std::vector<TextBox> boxes;
-  for (RenderObject* object = m_renderView.get(); object;
-       object = object->nextInPreOrder()) {
-    if (!object->isText())
-      continue;
-    RenderText* text = toRenderText(object);
-    unsigned length = text->textLength();
-    if (offset + length > start) {
-      unsigned startOffset = offset > start ? 0 : start - offset;
-      unsigned endOffset = end - offset;
-      text->appendAbsoluteTextBoxesForRange(boxes, startOffset, endOffset);
-    }
-    offset += length;
-    if (offset >= end)
-      break;
-  }
-
-  return boxes;
-}
-
-int Paragraph::absoluteOffsetForPosition(const PositionWithAffinity& position) {
-  FTL_DCHECK(position.renderer());
-  unsigned offset = 0;
-  for (RenderObject* object = m_renderView.get(); object;
-       object = object->nextInPreOrder()) {
-    if (object == position.renderer())
-      return offset + position.offset();
-    if (object->isText()) {
-      RenderText* text = toRenderText(object);
-      offset += text->textLength();
-    }
-  }
-  FTL_DCHECK(false);
-  return 0;
+  return m_paragraphImpl->getRectsForRange(start, end);
 }
 
 Dart_Handle Paragraph::getPositionForOffset(double dx, double dy) {
-  LayoutPoint point(dx, dy);
-  PositionWithAffinity position = m_renderView->positionForPoint(point);
-  Dart_Handle result = Dart_NewList(2);
-  Dart_ListSetAt(result, 0, ToDart(absoluteOffsetForPosition(position)));
-  Dart_ListSetAt(result, 1, ToDart(static_cast<int>(position.affinity())));
-  return result;
+  return m_paragraphImpl->getPositionForOffset(dx, dy);
 }
 
 Dart_Handle Paragraph::getWordBoundary(unsigned offset) {
-  String text;
-  int start = 0, end = 0;
-
-  for (RenderObject* object = m_renderView.get(); object;
-       object = object->nextInPreOrder()) {
-    if (!object->isText())
-      continue;
-    RenderText* renderText = toRenderText(object);
-    text.append(renderText->text());
-  }
-
-  TextBreakIterator* it = wordBreakIterator(text, 0, text.length());
-  if (it) {
-    end = it->following(offset);
-    if (end < 0)
-      end = it->last();
-    start = it->previous();
-  }
-
-  Dart_Handle result = Dart_NewList(2);
-  Dart_ListSetAt(result, 0, ToDart(start));
-  Dart_ListSetAt(result, 1, ToDart(end));
-  return result;
+  return m_paragraphImpl->getWordBoundary(offset);
 }
 
 }  // namespace blink

lib/ui/text/paragraph.h

@@ -6,9 +6,14 @@
 #define FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_
 
 #include "flutter/lib/ui/painting/canvas.h"
+#include "flutter/lib/ui/text/paragraph_impl.h"
+#include "flutter/lib/ui/text/paragraph_impl_blink.h"
+#include "flutter/lib/ui/text/paragraph_impl_txt.h"
 #include "flutter/lib/ui/text/text_box.h"
 #include "flutter/sky/engine/core/rendering/RenderView.h"
+#include "flutter/sky/engine/wtf/PassOwnPtr.h"
 #include "lib/tonic/dart_wrappable.h"
+#include "lib/txt/src/paragraph.h"
 
 namespace tonic {
 class DartLibraryNatives;
@@ -22,10 +27,15 @@ class Paragraph : public ftl::RefCountedThreadSafe<Paragraph>,
   FRIEND_MAKE_REF_COUNTED(Paragraph);
 
  public:
-  static ftl::RefPtr<Paragraph> create(PassOwnPtr<RenderView> renderView) {
+  static ftl::RefPtr<Paragraph> Create(PassOwnPtr<RenderView> renderView) {
     return ftl::MakeRefCounted<Paragraph>(renderView);
   }
 
+  static ftl::RefPtr<Paragraph> Create(
+      std::unique_ptr<txt::Paragraph> paragraph) {
+    return ftl::MakeRefCounted<Paragraph>(std::move(paragraph));
+  }
+
   ~Paragraph() override;
 
   double width();
@@ -48,12 +58,14 @@ class Paragraph : public ftl::RefCountedThreadSafe<Paragraph>,
   static void RegisterNatives(tonic::DartLibraryNatives* natives);
 
  private:
-  RenderBox* firstChildBox() const { return m_renderView->firstChildBox(); }
+  std::unique_ptr<ParagraphImpl> m_paragraphImpl;
 
-  int absoluteOffsetForPosition(const PositionWithAffinity& position);
+  RenderBox* firstChildBox() const { return m_renderView->firstChildBox(); }
 
   explicit Paragraph(PassOwnPtr<RenderView> renderView);
 
+  explicit Paragraph(std::unique_ptr<txt::Paragraph> paragraph);
+
   OwnPtr<RenderView> m_renderView;
 };
 

lib/ui/text/paragraph_builder.cc

@@ -4,6 +4,7 @@
 
 #include "flutter/lib/ui/text/paragraph_builder.h"
 
+#include "flutter/common/settings.h"
 #include "flutter/common/threads.h"
 #include "flutter/lib/ui/ui_dart_state.h"
 #include "flutter/sky/engine/core/rendering/RenderInline.h"
@@ -16,6 +17,12 @@
 #include "lib/tonic/dart_args.h"
 #include "lib/tonic/dart_binding_macros.h"
 #include "lib/tonic/dart_library_natives.h"
+#include "lib/txt/src/font_style.h"
+#include "lib/txt/src/font_weight.h"
+#include "lib/txt/src/paragraph_style.h"
+#include "lib/txt/src/text_align.h"
+#include "lib/txt/src/text_decoration.h"
+#include "lib/txt/src/text_style.h"
 
 namespace blink {
 namespace {
@@ -95,13 +102,12 @@ void createFontForDocument(RenderStyle* style) {
   style->font().update(UIDartState::Current()->font_selector());
 }
 
-PassRefPtr<RenderStyle> decodeParagraphStyle(
-    RenderStyle* parentStyle,
-    tonic::Int32List& encoded,
-    const std::string& fontFamily,
-    double fontSize,
-    double lineHeight,
-    const std::string& ellipsis) {
+PassRefPtr<RenderStyle> decodeParagraphStyle(RenderStyle* parentStyle,
+                                             tonic::Int32List& encoded,
+                                             const std::string& fontFamily,
+                                             double fontSize,
+                                             double lineHeight,
+                                             const std::string& ellipsis) {
   FTL_DCHECK(encoded.num_elements() == 5);
 
   RefPtr<RenderStyle> style = RenderStyle::create();
@@ -187,8 +193,8 @@ ftl::RefPtr<ParagraphBuilder> ParagraphBuilder::create(
     double fontSize,
     double lineHeight,
     const std::string& ellipsis) {
-  return ftl::MakeRefCounted<ParagraphBuilder>(
-      encoded, fontFamily, fontSize, lineHeight, ellipsis);
+  return ftl::MakeRefCounted<ParagraphBuilder>(encoded, fontFamily, fontSize,
+                                               lineHeight, ellipsis);
 }
 
 ParagraphBuilder::ParagraphBuilder(tonic::Int32List& encoded,
@@ -196,24 +202,61 @@ ParagraphBuilder::ParagraphBuilder(tonic::Int32List& encoded,
                                    double fontSize,
                                    double lineHeight,
                                    const std::string& ellipsis) {
-  createRenderView();
+  if (!Settings::Get().using_blink) {
+    int32_t mask = encoded[0];
+    txt::ParagraphStyle style;
+    if (mask & psTextAlignMask)
+      style.text_align = txt::TextAlign(encoded[psTextAlignIndex]);
+
+    if (mask & (psFontWeightMask | psFontStyleMask | psFontFamilyMask |
+                psFontSizeMask)) {
+      if (mask & psFontWeightMask)
+        style.font_weight =
+            static_cast<txt::FontWeight>(encoded[psFontWeightIndex]);
+
+      if (mask & psFontStyleMask)
+        style.font_style =
+            static_cast<txt::FontStyle>(encoded[psFontStyleIndex]);
+
+      if (mask & psFontFamilyMask)
+        style.font_family = fontFamily;
+
+      if (mask & psFontSizeMask)
+        style.font_size = fontSize;
+    }
 
-  RefPtr<RenderStyle> paragraphStyle = decodeParagraphStyle(
-      m_renderView->style(), encoded, fontFamily, fontSize, lineHeight, ellipsis);
-  encoded.Release();
+    if (mask & psLineHeightMask)
+      style.line_height = lineHeight;
 
-  m_renderParagraph = new RenderParagraph();
-  m_renderParagraph->setStyle(paragraphStyle.release());
+    if (mask & psMaxLinesMask)
+      style.max_lines = encoded[psMaxLinesIndex];
 
-  m_currentRenderObject = m_renderParagraph;
-  m_renderView->addChild(m_currentRenderObject);
-}
+    if (mask & psEllipsisMask)
+      style.ellipsis = ellipsis;
+
+    m_paragraphBuilder.SetParagraphStyle(style);
+  } else {
+    // Blink version.
+    createRenderView();
+
+    RefPtr<RenderStyle> paragraphStyle =
+        decodeParagraphStyle(m_renderView->style(), encoded, fontFamily,
+                             fontSize, lineHeight, ellipsis);
+    encoded.Release();
+
+    m_renderParagraph = new RenderParagraph();
+    m_renderParagraph->setStyle(paragraphStyle.release());
+
+    m_currentRenderObject = m_renderParagraph;
+    m_renderView->addChild(m_currentRenderObject);
+  }
+
+}  // namespace blink
 
 ParagraphBuilder::~ParagraphBuilder() {
   if (m_renderView) {
     RenderView* renderView = m_renderView.leakPtr();
-    Threads::UI()->PostTask(
-        [renderView]() { renderView->destroy(); });
+    Threads::UI()->PostTask([renderView]() { renderView->destroy(); });
   }
 }
 
@@ -224,98 +267,167 @@ void ParagraphBuilder::pushStyle(tonic::Int32List& encoded,
                                  double wordSpacing,
                                  double height) {
   FTL_DCHECK(encoded.num_elements() == 8);
-  RefPtr<RenderStyle> style = RenderStyle::create();
-  style->inheritFrom(m_currentRenderObject->style());
 
   int32_t mask = encoded[0];
 
-  if (mask & tsColorMask)
-    style->setColor(getColorFromARGB(encoded[tsColorIndex]));
+  if (!Settings::Get().using_blink) {
+    txt::TextStyle tstyle;
 
-  if (mask & tsTextDecorationMask) {
-    style->setTextDecoration(
-        static_cast<TextDecoration>(encoded[tsTextDecorationIndex]));
-    style->applyTextDecorations();
-  }
+    if (mask & tsColorMask)
+      tstyle.color = encoded[tsColorIndex];
 
-  if (mask & tsTextDecorationColorMask)
-    style->setTextDecorationColor(
-        StyleColor(getColorFromARGB(encoded[tsTextDecorationColorIndex])));
+    if (mask & tsTextDecorationMask) {
+      tstyle.decoration =
+          static_cast<txt::TextDecoration>(encoded[tsTextDecorationIndex]);
+    }
 
-  if (mask & tsTextDecorationStyleMask)
-    style->setTextDecorationStyle(
-        static_cast<TextDecorationStyle>(encoded[tsTextDecorationStyleIndex]));
+    if (mask & tsTextDecorationColorMask)
+      tstyle.decoration_color = encoded[tsTextDecorationColorIndex];
 
-  if (mask & tsTextBaselineMask) {
-    // TODO(abarth): Implement TextBaseline. The CSS version of this
-    // property wasn't wired up either.
-  }
+    if (mask & tsTextDecorationStyleMask)
+      tstyle.decoration_style = static_cast<txt::TextDecorationStyle>(
+          encoded[tsTextDecorationStyleIndex]);
 
-  if (mask & (tsFontWeightMask | tsFontStyleMask | tsFontFamilyMask |
-              tsFontSizeMask | tsLetterSpacingMask | tsWordSpacingMask)) {
-    FontDescription fontDescription = style->fontDescription();
+    if (mask & tsTextBaselineMask) {
+      // TODO(abarth): Implement TextBaseline. The CSS version of this
+      // property wasn't wired up either.
+    }
 
-    if (mask & tsFontWeightMask)
-      fontDescription.setWeight(
-          static_cast<FontWeight>(encoded[tsFontWeightIndex]));
+    if (mask & (tsFontWeightMask | tsFontStyleMask | tsFontFamilyMask |
+                tsFontSizeMask | tsLetterSpacingMask | tsWordSpacingMask)) {
+      if (mask & tsFontWeightMask)
+        tstyle.font_weight =
+            static_cast<txt::FontWeight>(encoded[tsFontWeightIndex]);
 
-    if (mask & tsFontStyleMask)
-      fontDescription.setStyle(
-          static_cast<FontStyle>(encoded[tsFontStyleIndex]));
+      if (mask & tsFontStyleMask)
+        tstyle.font_style =
+            static_cast<txt::FontStyle>(encoded[tsFontStyleIndex]);
 
-    if (mask & tsFontFamilyMask) {
-      FontFamily family;
-      family.setFamily(String::fromUTF8(fontFamily));
-      fontDescription.setFamily(family);
+      if (mask & tsFontFamilyMask)
+        tstyle.font_family = fontFamily;
+
+      if (mask & tsFontSizeMask)
+        tstyle.font_size = fontSize;
+
+      if (mask & tsLetterSpacingMask)
+        tstyle.letter_spacing = letterSpacing;
+
+      if (mask & tsWordSpacingMask)
+        tstyle.word_spacing = wordSpacing;
     }
 
-    if (mask & tsFontSizeMask) {
-      fontDescription.setSpecifiedSize(fontSize);
-      fontDescription.setIsAbsoluteSize(true);
-      fontDescription.setComputedSize(
-          getComputedSizeFromSpecifiedSize(fontSize));
+    if (mask & tsHeightMask) {
+      tstyle.height = height;
     }
 
-    if (mask & tsLetterSpacingMask)
-      fontDescription.setLetterSpacing(letterSpacing);
+    m_paragraphBuilder.PushStyle(tstyle);
+  } else {
+    // Blink Version.
+    RefPtr<RenderStyle> style = RenderStyle::create();
+    style->inheritFrom(m_currentRenderObject->style());
 
-    if (mask & tsWordSpacingMask)
-      fontDescription.setWordSpacing(wordSpacing);
+    if (mask & tsColorMask)
+      style->setColor(getColorFromARGB(encoded[tsColorIndex]));
 
-    style->setFontDescription(fontDescription);
-    style->font().update(UIDartState::Current()->font_selector());
-  }
+    if (mask & tsTextDecorationMask) {
+      style->setTextDecoration(
+          static_cast<TextDecoration>(encoded[tsTextDecorationIndex]));
+      style->applyTextDecorations();
+    }
 
-  if (mask & tsHeightMask) {
-    style->setLineHeight(Length(height * 100.0, Percent));
-  }
+    if (mask & tsTextDecorationColorMask)
+      style->setTextDecorationColor(
+          StyleColor(getColorFromARGB(encoded[tsTextDecorationColorIndex])));
+
+    if (mask & tsTextDecorationStyleMask)
+      style->setTextDecorationStyle(static_cast<TextDecorationStyle>(
+          encoded[tsTextDecorationStyleIndex]));
+
+    if (mask & tsTextBaselineMask) {
+      // TODO(abarth): Implement TextBaseline. The CSS version of this
+      // property wasn't wired up either.
+    }
+
+    if (mask & (tsFontWeightMask | tsFontStyleMask | tsFontFamilyMask |
+                tsFontSizeMask | tsLetterSpacingMask | tsWordSpacingMask)) {
+      FontDescription fontDescription = style->fontDescription();
+
+      if (mask & tsFontWeightMask)
+        fontDescription.setWeight(
+            static_cast<FontWeight>(encoded[tsFontWeightIndex]));
 
-  encoded.Release();
+      if (mask & tsFontStyleMask)
+        fontDescription.setStyle(
+            static_cast<FontStyle>(encoded[tsFontStyleIndex]));
 
-  RenderObject* span = new RenderInline();
-  span->setStyle(style.release());
-  m_currentRenderObject->addChild(span);
-  m_currentRenderObject = span;
+      if (mask & tsFontFamilyMask) {
+        FontFamily family;
+        family.setFamily(String::fromUTF8(fontFamily));
+        fontDescription.setFamily(family);
+      }
+
+      if (mask & tsFontSizeMask) {
+        fontDescription.setSpecifiedSize(fontSize);
+        fontDescription.setIsAbsoluteSize(true);
+        fontDescription.setComputedSize(
+            getComputedSizeFromSpecifiedSize(fontSize));
+      }
+
+      if (mask & tsLetterSpacingMask)
+        fontDescription.setLetterSpacing(letterSpacing);
+
+      if (mask & tsWordSpacingMask)
+        fontDescription.setWordSpacing(wordSpacing);
+
+      style->setFontDescription(fontDescription);
+      style->font().update(UIDartState::Current()->font_selector());
+    }
+
+    if (mask & tsHeightMask) {
+      style->setLineHeight(Length(height * 100.0, Percent));
+    }
+
+    encoded.Release();
+
+    RenderObject* span = new RenderInline();
+    span->setStyle(style.release());
+    m_currentRenderObject->addChild(span);
+    m_currentRenderObject = span;
+  }
 }
 
 void ParagraphBuilder::pop() {
-  if (m_currentRenderObject)
-    m_currentRenderObject = m_currentRenderObject->parent();
+  if (!Settings::Get().using_blink) {
+    m_paragraphBuilder.Pop();
+  } else {
+    // Blink Version.
+    if (m_currentRenderObject)
+      m_currentRenderObject = m_currentRenderObject->parent();
+  }
 }
 
 void ParagraphBuilder::addText(const std::string& text) {
-  if (!m_currentRenderObject)
-    return;
-  RenderText* renderText = new RenderText(String::fromUTF8(text).impl());
-  RefPtr<RenderStyle> style = RenderStyle::create();
-  style->inheritFrom(m_currentRenderObject->style());
-  renderText->setStyle(style.release());
-  m_currentRenderObject->addChild(renderText);
+  if (!Settings::Get().using_blink) {
+    m_paragraphBuilder.AddText(text);
+  } else {
+    // Blink Version.
+    if (!m_currentRenderObject)
+      return;
+    RenderText* renderText = new RenderText(String::fromUTF8(text).impl());
+    RefPtr<RenderStyle> style = RenderStyle::create();
+    style->inheritFrom(m_currentRenderObject->style());
+    renderText->setStyle(style.release());
+    m_currentRenderObject->addChild(renderText);
+  }
 }
 
 ftl::RefPtr<Paragraph> ParagraphBuilder::build() {
   m_currentRenderObject = nullptr;
-  return Paragraph::create(m_renderView.release());
+  if (!Settings::Get().using_blink) {
+    return Paragraph::Create(m_paragraphBuilder.Build());
+  } else {
+    return Paragraph::Create(m_renderView.release());
+  }
 }
 
 void ParagraphBuilder::createRenderView() {

lib/ui/text/paragraph_builder.h

@@ -6,8 +6,11 @@
 #define FLUTTER_LIB_UI_TEXT_PARAGRAPH_BUILDER_H_
 
 #include "flutter/lib/ui/text/paragraph.h"
+#include "flutter/sky/engine/core/rendering/RenderObject.h"
+#include "flutter/sky/engine/wtf/OwnPtr.h"
 #include "lib/tonic/dart_wrappable.h"
 #include "lib/tonic/typed_data/int32_list.h"
+#include "lib/txt/src/paragraph_builder.h"
 
 namespace tonic {
 class DartLibraryNatives;
@@ -15,6 +18,8 @@ class DartLibraryNatives;
 
 namespace blink {
 
+class Paragraph;
+
 class ParagraphBuilder : public ftl::RefCountedThreadSafe<ParagraphBuilder>,
                          public tonic::DartWrappable {
   DEFINE_WRAPPERTYPEINFO();
@@ -35,6 +40,7 @@ class ParagraphBuilder : public ftl::RefCountedThreadSafe<ParagraphBuilder>,
                  double letterSpacing,
                  double wordSpacing,
                  double height);
+
   void pop();
 
   void addText(const std::string& text);
@@ -55,6 +61,7 @@ class ParagraphBuilder : public ftl::RefCountedThreadSafe<ParagraphBuilder>,
   OwnPtr<RenderView> m_renderView;
   RenderObject* m_renderParagraph;
   RenderObject* m_currentRenderObject;
+  txt::ParagraphBuilder m_paragraphBuilder;
 };
 
 }  // namespace blink

lib/ui/text/paragraph_impl.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/lib/ui/text/paragraph_impl.h"
+
+namespace blink {}  // namespace blink

lib/ui/text/paragraph_impl.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_H_
+#define FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_H_
+
+#include "flutter/lib/ui/painting/canvas.h"
+#include "flutter/lib/ui/text/text_box.h"
+
+namespace blink {
+
+class ParagraphImpl {
+ public:
+  virtual ~ParagraphImpl(){};
+
+  virtual double width() = 0;
+
+  virtual double height() = 0;
+
+  virtual double minIntrinsicWidth() = 0;
+
+  virtual double maxIntrinsicWidth() = 0;
+
+  virtual double alphabeticBaseline() = 0;
+
+  virtual double ideographicBaseline() = 0;
+
+  virtual bool didExceedMaxLines() = 0;
+
+  virtual void layout(double width) = 0;
+
+  virtual void paint(Canvas* canvas, double x, double y) = 0;
+
+  virtual std::vector<TextBox> getRectsForRange(unsigned start,
+                                                unsigned end) = 0;
+
+  virtual Dart_Handle getPositionForOffset(double dx, double dy) = 0;
+
+  virtual Dart_Handle getWordBoundary(unsigned offset) = 0;
+};
+
+}  // namespace blink
+
+#endif  // FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_H_

lib/ui/text/paragraph_impl_blink.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/lib/ui/text/paragraph_impl_blink.h"
+
+#include "flutter/common/threads.h"
+#include "flutter/lib/ui/text/paragraph.h"
+#include "flutter/lib/ui/text/paragraph_impl.h"
+#include "flutter/sky/engine/core/rendering/PaintInfo.h"
+#include "flutter/sky/engine/core/rendering/RenderParagraph.h"
+#include "flutter/sky/engine/core/rendering/RenderText.h"
+#include "flutter/sky/engine/core/rendering/style/RenderStyle.h"
+#include "flutter/sky/engine/platform/fonts/FontCache.h"
+#include "flutter/sky/engine/platform/graphics/GraphicsContext.h"
+#include "flutter/sky/engine/platform/text/TextBoundaries.h"
+#include "lib/ftl/tasks/task_runner.h"
+#include "lib/tonic/converter/dart_converter.h"
+#include "lib/tonic/dart_args.h"
+#include "lib/tonic/dart_binding_macros.h"
+#include "lib/tonic/dart_library_natives.h"
+
+using tonic::ToDart;
+
+namespace blink {
+
+ParagraphImplBlink::ParagraphImplBlink(PassOwnPtr<RenderView> renderView)
+    : m_renderView(renderView) {}
+
+ParagraphImplBlink::~ParagraphImplBlink() {
+  if (m_renderView) {
+    RenderView* renderView = m_renderView.leakPtr();
+    Threads::UI()->PostTask([renderView]() { renderView->destroy(); });
+  }
+}
+
+double ParagraphImplBlink::width() {
+  return firstChildBox()->width();
+}
+
+double ParagraphImplBlink::height() {
+  return firstChildBox()->height();
+}
+
+double ParagraphImplBlink::minIntrinsicWidth() {
+  return firstChildBox()->minPreferredLogicalWidth();
+}
+
+double ParagraphImplBlink::maxIntrinsicWidth() {
+  return firstChildBox()->maxPreferredLogicalWidth();
+}
+
+double ParagraphImplBlink::alphabeticBaseline() {
+  return firstChildBox()->firstLineBoxBaseline(
+      FontBaselineOrAuto(AlphabeticBaseline));
+}
+
+double ParagraphImplBlink::ideographicBaseline() {
+  return firstChildBox()->firstLineBoxBaseline(
+      FontBaselineOrAuto(IdeographicBaseline));
+}
+
+bool ParagraphImplBlink::didExceedMaxLines() {
+  RenderBox* box = firstChildBox();
+  ASSERT(box->isRenderParagraph());
+  RenderParagraph* paragraph = static_cast<RenderParagraph*>(box);
+  return paragraph->didExceedMaxLines();
+}
+
+void ParagraphImplBlink::layout(double width) {
+  FontCachePurgePreventer fontCachePurgePreventer;
+
+  int maxWidth = LayoutUnit(width);  // Handles infinity properly.
+  m_renderView->setFrameViewSize(IntSize(maxWidth, intMaxForLayoutUnit));
+  m_renderView->layout();
+}
+
+void ParagraphImplBlink::paint(Canvas* canvas, double x, double y) {
+  SkCanvas* skCanvas = canvas->canvas();
+  if (!skCanvas)
+    return;
+
+  FontCachePurgePreventer fontCachePurgePreventer;
+
+  // Very simplified painting to allow painting an arbitrary (layer-less)
+  // subtree.
+  RenderBox* box = firstChildBox();
+  skCanvas->translate(x, y);
+
+  GraphicsContext context(skCanvas);
+  Vector<RenderBox*> layers;
+  LayoutRect bounds = box->absoluteBoundingBoxRect();
+  FTL_DCHECK(bounds.x() == 0 && bounds.y() == 0);
+  PaintInfo paintInfo(&context, enclosingIntRect(bounds), box);
+  box->paint(paintInfo, LayoutPoint(), layers);
+  // Note we're ignoring any layers encountered.
+  // TODO(abarth): Remove the concept of RenderLayers.
+
+  skCanvas->translate(-x, -y);
+}
+
+std::vector<TextBox> ParagraphImplBlink::getRectsForRange(unsigned start,
+                                                          unsigned end) {
+  if (end <= start || start == end)
+    return std::vector<TextBox>();
+
+  unsigned offset = 0;
+  std::vector<TextBox> boxes;
+  for (RenderObject* object = m_renderView.get(); object;
+       object = object->nextInPreOrder()) {
+    if (!object->isText())
+      continue;
+    RenderText* text = toRenderText(object);
+    unsigned length = text->textLength();
+    if (offset + length > start) {
+      unsigned startOffset = offset > start ? 0 : start - offset;
+      unsigned endOffset = end - offset;
+      text->appendAbsoluteTextBoxesForRange(boxes, startOffset, endOffset);
+    }
+    offset += length;
+    if (offset >= end)
+      break;
+  }
+
+  return boxes;
+}
+
+int ParagraphImplBlink::absoluteOffsetForPosition(
+    const PositionWithAffinity& position) {
+  FTL_DCHECK(position.renderer());
+  unsigned offset = 0;
+  for (RenderObject* object = m_renderView.get(); object;
+       object = object->nextInPreOrder()) {
+    if (object == position.renderer())
+      return offset + position.offset();
+    if (object->isText()) {
+      RenderText* text = toRenderText(object);
+      offset += text->textLength();
+    }
+  }
+  FTL_DCHECK(false);
+  return 0;
+}
+
+Dart_Handle ParagraphImplBlink::getPositionForOffset(double dx, double dy) {
+  LayoutPoint point(dx, dy);
+  PositionWithAffinity position = m_renderView->positionForPoint(point);
+  Dart_Handle result = Dart_NewList(2);
+  Dart_ListSetAt(result, 0, ToDart(absoluteOffsetForPosition(position)));
+  Dart_ListSetAt(result, 1, ToDart(static_cast<int>(position.affinity())));
+  return result;
+}
+
+Dart_Handle ParagraphImplBlink::getWordBoundary(unsigned offset) {
+  String text;
+  int start = 0, end = 0;
+
+  for (RenderObject* object = m_renderView.get(); object;
+       object = object->nextInPreOrder()) {
+    if (!object->isText())
+      continue;
+    RenderText* renderText = toRenderText(object);
+    text.append(renderText->text());
+  }
+
+  TextBreakIterator* it = wordBreakIterator(text, 0, text.length());
+  if (it) {
+    end = it->following(offset);
+    if (end < 0)
+      end = it->last();
+    start = it->previous();
+  }
+
+  Dart_Handle result = Dart_NewList(2);
+  Dart_ListSetAt(result, 0, ToDart(start));
+  Dart_ListSetAt(result, 1, ToDart(end));
+  return result;
+}
+
+}  // namespace blink

lib/ui/text/paragraph_impl_blink.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_BLINK_H_
+#define FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_BLINK_H_
+
+#include "flutter/lib/ui/painting/canvas.h"
+#include "flutter/lib/ui/text/paragraph_impl.h"
+#include "flutter/lib/ui/text/text_box.h"
+#include "flutter/sky/engine/core/rendering/RenderView.h"
+#include "lib/txt/src/paragraph.h"
+
+namespace blink {
+
+class ParagraphImplBlink : public ParagraphImpl {
+ public:
+  ~ParagraphImplBlink() override;
+
+  explicit ParagraphImplBlink(PassOwnPtr<RenderView> renderView);
+
+  double width() override;
+  double height() override;
+  double minIntrinsicWidth() override;
+  double maxIntrinsicWidth() override;
+  double alphabeticBaseline() override;
+  double ideographicBaseline() override;
+  bool didExceedMaxLines() override;
+
+  void layout(double width) override;
+  void paint(Canvas* canvas, double x, double y) override;
+
+  std::vector<TextBox> getRectsForRange(unsigned start, unsigned end) override;
+  Dart_Handle getPositionForOffset(double dx, double dy) override;
+  Dart_Handle getWordBoundary(unsigned offset) override;
+
+  RenderView* renderView() const { return m_renderView.get(); }
+
+ private:
+  RenderBox* firstChildBox() const { return m_renderView->firstChildBox(); }
+
+  int absoluteOffsetForPosition(const PositionWithAffinity& position);
+
+  OwnPtr<RenderView> m_renderView;
+};
+
+}  // namespace blink
+
+#endif  // FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_BLINK_H_

lib/ui/text/paragraph_impl_txt.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/lib/ui/text/paragraph_impl_txt.h"
+
+#include "flutter/common/threads.h"
+#include "flutter/lib/ui/text/paragraph.h"
+#include "flutter/lib/ui/text/paragraph_impl.h"
+#include "lib/ftl/tasks/task_runner.h"
+#include "lib/txt/src/paragraph_constraints.h"
+
+namespace blink {
+
+ParagraphImplTxt::ParagraphImplTxt(std::unique_ptr<txt::Paragraph> paragraph)
+    : m_paragraph(std::move(paragraph)) {}
+
+ParagraphImplTxt::~ParagraphImplTxt() {}
+
+double ParagraphImplTxt::width() {
+  return m_width;
+}
+
+double ParagraphImplTxt::height() {
+  return m_paragraph->GetHeight();
+}
+
+double ParagraphImplTxt::minIntrinsicWidth() {
+  return m_paragraph->GetMinIntrinsicWidth();
+}
+
+double ParagraphImplTxt::maxIntrinsicWidth() {
+  return m_paragraph->GetMaxIntrinsicWidth();
+}
+
+double ParagraphImplTxt::alphabeticBaseline() {
+  return m_paragraph->GetAlphabeticBaseline();
+}
+
+double ParagraphImplTxt::ideographicBaseline() {
+  return m_paragraph->GetIdeographicBaseline();
+}
+
+bool ParagraphImplTxt::didExceedMaxLines() {
+  return m_paragraph->DidExceedMaxLines();
+}
+
+void ParagraphImplTxt::layout(double width) {
+  m_width = width;
+  m_paragraph->Layout(txt::ParagraphConstraints{width});
+}
+
+void ParagraphImplTxt::paint(Canvas* canvas, double x, double y) {
+  SkCanvas* sk_canvas = canvas->canvas();
+  if (!sk_canvas)
+    return;
+  m_paragraph->Paint(sk_canvas, x, y);
+}
+
+std::vector<TextBox> ParagraphImplTxt::getRectsForRange(unsigned start,
+                                                        unsigned end) {
+  return std::vector<TextBox>{0ull};
+}
+
+Dart_Handle ParagraphImplTxt::getPositionForOffset(double dx, double dy) {
+  // TODO(garyq): Implement in the library.
+  return nullptr;
+}
+
+Dart_Handle ParagraphImplTxt::getWordBoundary(unsigned offset) {
+  // TODO(garyq): Implement in the library.
+  return nullptr;
+}
+
+}  // namespace blink

lib/ui/text/paragraph_impl_txt.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_TXT_H_
+#define FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_TXT_H_
+
+#include "flutter/lib/ui/painting/canvas.h"
+#include "flutter/lib/ui/text/paragraph_impl.h"
+#include "flutter/lib/ui/text/paragraph_impl_blink.h"
+#include "flutter/lib/ui/text/text_box.h"
+#include "lib/txt/src/paragraph.h"
+
+namespace blink {
+
+class ParagraphImplTxt : public ParagraphImpl {
+ public:
+  ~ParagraphImplTxt() override;
+
+  explicit ParagraphImplTxt(std::unique_ptr<txt::Paragraph> paragraph);
+
+  double width() override;
+  double height() override;
+  double minIntrinsicWidth() override;
+  double maxIntrinsicWidth() override;
+  double alphabeticBaseline() override;
+  double ideographicBaseline() override;
+  bool didExceedMaxLines() override;
+
+  void layout(double width) override;
+  void paint(Canvas* canvas, double x, double y) override;
+
+  std::vector<TextBox> getRectsForRange(unsigned start, unsigned end) override;
+  Dart_Handle getPositionForOffset(double dx, double dy) override;
+  Dart_Handle getWordBoundary(unsigned offset) override;
+
+ private:
+  std::unique_ptr<txt::Paragraph> m_paragraph;
+  double m_width = -1.0;
+};
+
+}  // namespace blink
+
+#endif  // FLUTTER_LIB_UI_TEXT_PARAGRAPH_IMPL_TXT_H_

shell/common/shell.cc

@@ -147,6 +147,9 @@ void Shell::InitStandalone(ftl::CommandLine command_line,
   settings.enable_software_rendering =
       command_line.HasOption(FlagForSwitch(Switch::EnableSoftwareRendering));
 
+  settings.using_blink =
+      !command_line.HasOption(FlagForSwitch(Switch::EnableTxt));
+
   settings.endless_trace_buffer =
       command_line.HasOption(FlagForSwitch(Switch::EndlessTraceBuffer));
 

shell/common/switches.h

@@ -63,6 +63,9 @@ DEF_SWITCH(EnableSoftwareRendering,
            "Enable rendering using the Skia software backend. This is useful"
            "when testing Flutter on emulators. By default, Flutter will"
            "attempt to either use OpenGL or Vulkan.")
+DEF_SWITCH(EnableTxt,
+           "enable-txt",
+           "Enable libtxt as the text shaping library instead of Blink.")
 DEF_SWITCH(FLX, "flx", "Specify the the FLX path.")
 DEF_SWITCH(Help, "help", "Display this help text.")
 DEF_SWITCH(LogTag, "log-tag", "Tag associated with log messages.")

shell/platform/android/io/flutter/app/FlutterActivityDelegate.java

@@ -245,6 +245,9 @@ public final class FlutterActivityDelegate
         if (intent.getBooleanExtra("enable-software-rendering", false)) {
             args.add("--enable-software-rendering");
         }
+        if (intent.getBooleanExtra("enable-txt", false)) {
+            args.add("--enable-txt");
+        }
         if (!args.isEmpty()) {
             String[] argsArray = new String[args.size()];
             return args.toArray(argsArray);

sky/packages/sky_engine/LICENSE

@@ -9162,6 +9162,7 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 --------------------------------------------------------------------------------
 etc1
+lib
 observatory_pub_packages
 skia
 vulkan

travis/licenses_golden/licenses_flutter

@@ -1575,6 +1575,12 @@ FILE: ../../../flutter/lib/ui/text/paragraph.cc
 FILE: ../../../flutter/lib/ui/text/paragraph.h
 FILE: ../../../flutter/lib/ui/text/paragraph_builder.cc
 FILE: ../../../flutter/lib/ui/text/paragraph_builder.h
+FILE: ../../../flutter/lib/ui/text/paragraph_impl.cc
+FILE: ../../../flutter/lib/ui/text/paragraph_impl.h
+FILE: ../../../flutter/lib/ui/text/paragraph_impl_blink.cc
+FILE: ../../../flutter/lib/ui/text/paragraph_impl_blink.h
+FILE: ../../../flutter/lib/ui/text/paragraph_impl_txt.cc
+FILE: ../../../flutter/lib/ui/text/paragraph_impl_txt.h
 FILE: ../../../flutter/lib/ui/text/text_box.cc
 FILE: ../../../flutter/lib/ui/ui.dart
 FILE: ../../../flutter/lib/ui/ui_dart_state.cc

travis/licenses_golden/licenses_lib

-Signature: 4dcd5e5c7ba17499b85da8a9b3fa6637
+Signature: 483a21a70cc588d9a999c71e3b537fcb
 
 UNUSED LICENSES:
 
@@ -47,6 +47,285 @@ or other dealings in this Software without prior written authorization
 of the copyright holder.
 ====================================================================================================
 
+====================================================================================================
+LIBRARY: lib
+ORIGIN: ../../../dart/third_party/observatory_pub_packages/packages/quiver/LICENSE
+TYPE: LicenseType.apache
+FILE: ../../../lib/txt/Android.bp
+FILE: ../../../lib/txt/app/Android.bp
+FILE: ../../../lib/txt/app/HyphTool.cpp
+FILE: ../../../lib/txt/examples/main.cc
+FILE: ../../../lib/txt/include/minikin/CmapCoverage.h
+FILE: ../../../lib/txt/include/minikin/Emoji.h
+FILE: ../../../lib/txt/include/minikin/FontCollection.h
+FILE: ../../../lib/txt/include/minikin/FontFamily.h
+FILE: ../../../lib/txt/include/minikin/GraphemeBreak.h
+FILE: ../../../lib/txt/include/minikin/Hyphenator.h
+FILE: ../../../lib/txt/include/minikin/Layout.h
+FILE: ../../../lib/txt/include/minikin/LineBreaker.h
+FILE: ../../../lib/txt/include/minikin/Measurement.h
+FILE: ../../../lib/txt/include/minikin/MinikinFont.h
+FILE: ../../../lib/txt/include/minikin/SparseBitSet.h
+FILE: ../../../lib/txt/include/minikin/WordBreaker.h
+FILE: ../../../lib/txt/libs/minikin/Android.bp
+FILE: ../../../lib/txt/libs/minikin/CmapCoverage.cpp
+FILE: ../../../lib/txt/libs/minikin/Emoji.cpp
+FILE: ../../../lib/txt/libs/minikin/FontCollection.cpp
+FILE: ../../../lib/txt/libs/minikin/FontFamily.cpp
+FILE: ../../../lib/txt/libs/minikin/FontLanguage.cpp
+FILE: ../../../lib/txt/libs/minikin/FontLanguage.h
+FILE: ../../../lib/txt/libs/minikin/FontLanguageListCache.cpp
+FILE: ../../../lib/txt/libs/minikin/FontLanguageListCache.h
+FILE: ../../../lib/txt/libs/minikin/FontUtils.cpp
+FILE: ../../../lib/txt/libs/minikin/FontUtils.h
+FILE: ../../../lib/txt/libs/minikin/GraphemeBreak.cpp
+FILE: ../../../lib/txt/libs/minikin/HbFontCache.cpp
+FILE: ../../../lib/txt/libs/minikin/HbFontCache.h
+FILE: ../../../lib/txt/libs/minikin/Hyphenator.cpp
+FILE: ../../../lib/txt/libs/minikin/Layout.cpp
+FILE: ../../../lib/txt/libs/minikin/LayoutUtils.cpp
+FILE: ../../../lib/txt/libs/minikin/LayoutUtils.h
+FILE: ../../../lib/txt/libs/minikin/LineBreaker.cpp
+FILE: ../../../lib/txt/libs/minikin/Measurement.cpp
+FILE: ../../../lib/txt/libs/minikin/MinikinFont.cpp
+FILE: ../../../lib/txt/libs/minikin/MinikinInternal.cpp
+FILE: ../../../lib/txt/libs/minikin/MinikinInternal.h
+FILE: ../../../lib/txt/libs/minikin/SparseBitSet.cpp
+FILE: ../../../lib/txt/libs/minikin/WordBreaker.cpp
+FILE: ../../../lib/txt/shims/log/log.cc
+FILE: ../../../lib/txt/shims/log/log.h
+FILE: ../../../lib/txt/shims/utils/JenkinsHash.cpp
+FILE: ../../../lib/txt/shims/utils/JenkinsHash.h
+FILE: ../../../lib/txt/shims/utils/LruCache.h
+FILE: ../../../lib/txt/shims/utils/TypeHelpers.h
+FILE: ../../../lib/txt/src/font_collection.cc
+FILE: ../../../lib/txt/src/font_collection.h
+FILE: ../../../lib/txt/src/font_skia.cc
+FILE: ../../../lib/txt/src/font_skia.h
+FILE: ../../../lib/txt/src/font_style.h
+FILE: ../../../lib/txt/src/font_weight.h
+FILE: ../../../lib/txt/src/paint_record.cc
+FILE: ../../../lib/txt/src/paint_record.h
+FILE: ../../../lib/txt/src/paragraph.cc
+FILE: ../../../lib/txt/src/paragraph.h
+FILE: ../../../lib/txt/src/paragraph_builder.cc
+FILE: ../../../lib/txt/src/paragraph_builder.h
+FILE: ../../../lib/txt/src/paragraph_constraints.cc
+FILE: ../../../lib/txt/src/paragraph_constraints.h
+FILE: ../../../lib/txt/src/paragraph_style.cc
+FILE: ../../../lib/txt/src/paragraph_style.h
+FILE: ../../../lib/txt/src/styled_runs.cc
+FILE: ../../../lib/txt/src/styled_runs.h
+FILE: ../../../lib/txt/src/text_align.h
+FILE: ../../../lib/txt/src/text_baseline.h
+FILE: ../../../lib/txt/src/text_decoration.cc
+FILE: ../../../lib/txt/src/text_decoration.h
+FILE: ../../../lib/txt/src/text_style.cc
+FILE: ../../../lib/txt/src/text_style.h
+----------------------------------------------------------------------------------------------------
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
+   Object form, made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work
+   (an example is provided in the Appendix below).
+
+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
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 ====================================================================================================
 LIBRARY: lib
 ORIGIN: ../../../lib/ftl/LICENSE
@@ -391,4 +670,4 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ====================================================================================================
-Total license count: 6
+Total license count: 7