#include <paragraph.h>

Inheritance diagram for flutter::Paragraph:

Public Member Functions
	~Paragraph () override

double	width ()

double	height ()

double	longestLine ()

double	minIntrinsicWidth ()

double	maxIntrinsicWidth ()

double	alphabeticBaseline ()

double	ideographicBaseline ()

bool	didExceedMaxLines ()

void	layout (double width)

void	paint (Canvas *canvas, double x, double y)

tonic::Float32List	getRectsForRange (unsigned start, unsigned end, unsigned boxHeightStyle, unsigned boxWidthStyle)

tonic::Float32List	getRectsForPlaceholders ()

Dart_Handle	getPositionForOffset (double dx, double dy)

Dart_Handle	getGlyphInfoAt (unsigned utf16Offset, Dart_Handle constructor) const

Dart_Handle	getClosestGlyphInfo (double dx, double dy, Dart_Handle constructor) const

Dart_Handle	getWordBoundary (unsigned offset)

Dart_Handle	getLineBoundary (unsigned offset)

tonic::Float64List	computeLineMetrics () const

Dart_Handle	getLineMetricsAt (int lineNumber, Dart_Handle constructor) const

size_t	getNumberOfLines () const

int	getLineNumberAt (size_t utf16Offset) const

void	dispose ()

Public Member Functions inherited from flutter::RefCountedDartWrappable< Paragraph >
virtual void	RetainDartWrappableReference () const override

virtual void	ReleaseDartWrappableReference () const override

Public Member Functions inherited from fml::RefCountedThreadSafe< T >
void	Release () const

Public Member Functions inherited from fml::internal::RefCountedThreadSafeBase
void	AddRef () const

bool	HasOneRef () const

void	AssertHasOneRef () const

Public Member Functions inherited from tonic::DartWrappable
	DartWrappable ()

virtual const DartWrapperInfo &	GetDartWrapperInfo () const =0

Dart_Handle	CreateDartWrapper (DartState *dart_state)

void	AssociateWithDartWrapper (Dart_Handle wrappable)

void	ClearDartWrapper ()

Dart_WeakPersistentHandle	dart_wrapper () const

Static Public Member Functions
static void	Create (Dart_Handle paragraph_handle, std::unique_ptr< txt::Paragraph > txt_paragraph)

Additional Inherited Members
Public Types inherited from tonic::DartWrappable
enum	DartNativeFields { kPeerIndex , kNumberOfNativeFields }

Protected Member Functions inherited from fml::RefCountedThreadSafe< T >
	RefCountedThreadSafe ()

	~RefCountedThreadSafe ()

Protected Member Functions inherited from fml::internal::RefCountedThreadSafeBase
	RefCountedThreadSafeBase ()

	~RefCountedThreadSafeBase ()

bool	Release () const

void	Adopt ()

Protected Member Functions inherited from tonic::DartWrappable
virtual	~DartWrappable ()

Static Protected Member Functions inherited from tonic::DartWrappable
static Dart_PersistentHandle	GetTypeForWrapper (tonic::DartState *dart_state, const tonic::DartWrapperInfo &wrapper_info)

Detailed Description

Definition at line 15 of file paragraph.h.

Constructor & Destructor Documentation

◆ ~Paragraph()

flutter::Paragraph::~Paragraph ( )

overridedefault

Member Function Documentation

◆ alphabeticBaseline()

double flutter::Paragraph::alphabeticBaseline ( )

Definition at line 49 of file paragraph.cc.

                                     {
  return m_paragraph_->GetAlphabeticBaseline();
}

◆ computeLineMetrics()

tonic::Float64List flutter::Paragraph::computeLineMetrics ( ) const

Definition at line 187 of file paragraph.cc.

                                                     {
  std::vector<txt::LineMetrics> metrics = m_paragraph_->GetLineMetrics();
 
  // Layout:
  // boxes.size() groups of 9 which are the line metrics
  // properties
  tonic::Float64List result(
      Dart_NewTypedData(Dart_TypedData_kFloat64, metrics.size() * 9));
  uint64_t position = 0;
  for (uint64_t i = 0; i < metrics.size(); i++) {
    const txt::LineMetrics& line = metrics[i];
    result[position++] = static_cast<double>(line.hard_break);
    result[position++] = line.ascent;
    result[position++] = line.descent;
    result[position++] = line.unscaled_ascent;
    // We add then round to get the height. The
    // definition of height here is different
    // than the one in LibTxt.
    result[position++] = round(line.ascent + line.descent);
    result[position++] = line.width;
    result[position++] = line.left;
    result[position++] = line.baseline;
    result[position++] = static_cast<double>(line.line_number);
  }
 
  return result;
}

References txt::LineMetrics::ascent, txt::LineMetrics::baseline, txt::LineMetrics::descent, txt::LineMetrics::hard_break, i, txt::LineMetrics::left, txt::LineMetrics::line_number, txt::LineMetrics::unscaled_ascent, and txt::LineMetrics::width.

◆ Create()

static void flutter::Paragraph::Create	(	Dart_Handle	paragraph_handle,
		std::unique_ptr< txt::Paragraph >	txt_paragraph
	)

inlinestatic

Definition at line 20 of file paragraph.h.

                                                                {
    auto paragraph = fml::MakeRefCounted<Paragraph>(std::move(txt_paragraph));
    paragraph->AssociateWithDartWrapper(paragraph_handle);
  }

Referenced by flutter::ParagraphBuilder::build().

◆ didExceedMaxLines()

bool flutter::Paragraph::didExceedMaxLines ( )

Definition at line 57 of file paragraph.cc.

                                  {
  return m_paragraph_->DidExceedMaxLines();
}

◆ dispose()

void flutter::Paragraph::dispose ( )

Definition at line 251 of file paragraph.cc.

                        {
  m_paragraph_.reset();
  ClearDartWrapper();
}

◆ getClosestGlyphInfo()

Dart_Handle flutter::Paragraph::getClosestGlyphInfo	(	double	dx,
		double	dy,
		Dart_Handle	constructor
	)		const

Definition at line 151 of file paragraph.cc.

                                                                          {
  skia::textlayout::Paragraph::GlyphInfo glyphInfo;
  const bool found =
      m_paragraph_->GetClosestGlyphInfoAtCoordinate(dx, dy, &glyphInfo);
  if (!found) {
    return Dart_Null();
  }
  Dart_Handle handle = glyphInfoFrom(constructor, glyphInfo);
  tonic::CheckAndHandleError(handle);
  return handle;
}

References tonic::CheckAndHandleError(), and flutter::glyphInfoFrom().

◆ getGlyphInfoAt()

Dart_Handle flutter::Paragraph::getGlyphInfoAt	(	unsigned	utf16Offset,
		Dart_Handle	constructor
	)		const

Definition at line 139 of file paragraph.cc.

                                                                     {
  skia::textlayout::Paragraph::GlyphInfo glyphInfo;
  const bool found = m_paragraph_->GetGlyphInfoAt(utf16Offset, &glyphInfo);
  if (!found) {
    return Dart_Null();
  }
  Dart_Handle handle = glyphInfoFrom(constructor, glyphInfo);
  tonic::CheckAndHandleError(handle);
  return handle;
}

References tonic::CheckAndHandleError(), and flutter::glyphInfoFrom().

◆ getLineBoundary()

Dart_Handle flutter::Paragraph::getLineBoundary ( unsigned offset )

Definition at line 172 of file paragraph.cc.

                                                           {
  std::vector<txt::LineMetrics> metrics = m_paragraph_->GetLineMetrics();
  int line_start = -1;
  int line_end = -1;
  for (txt::LineMetrics& line : metrics) {
    if (utf16Offset >= line.start_index && utf16Offset <= line.end_index) {
      line_start = line.start_index;
      line_end = line.end_index;
      break;
    }
  }
  std::vector<int> result = {line_start, line_end};
  return tonic::DartConverter<decltype(result)>::ToDart(result);
}

◆ getLineMetricsAt()

Dart_Handle flutter::Paragraph::getLineMetricsAt	(	int	lineNumber,
		Dart_Handle	constructor
	)		const

Definition at line 215 of file paragraph.cc.

                                                                       {
  skia::textlayout::LineMetrics line;
  const bool found = m_paragraph_->GetLineMetricsAt(lineNumber, &line);
  if (!found) {
    return Dart_Null();
  }
  std::array<Dart_Handle, 9> arguments = {
      Dart_NewBoolean(line.fHardBreak),
      Dart_NewDouble(line.fAscent),
      Dart_NewDouble(line.fDescent),
      Dart_NewDouble(line.fUnscaledAscent),
      // We add then round to get the height. The
      // definition of height here is different
      // than the one in LibTxt.
      Dart_NewDouble(round(line.fAscent + line.fDescent)),
      Dart_NewDouble(line.fWidth),
      Dart_NewDouble(line.fLeft),
      Dart_NewDouble(line.fBaseline),
      Dart_NewInteger(line.fLineNumber),
  };
 
  Dart_Handle handle =
      Dart_InvokeClosure(constructor, arguments.size(), arguments.data());
  tonic::CheckAndHandleError(handle);
  return handle;
}

References tonic::CheckAndHandleError().

◆ getLineNumberAt()

int flutter::Paragraph::getLineNumberAt ( size_t utf16Offset ) const

Definition at line 247 of file paragraph.cc.

                                                       {
  return m_paragraph_->GetLineNumberAt(utf16Offset);
}

◆ getNumberOfLines()

size_t flutter::Paragraph::getNumberOfLines ( ) const

Definition at line 243 of file paragraph.cc.

                                         {
  return m_paragraph_->GetNumberOfLines();
}

◆ getPositionForOffset()

Dart_Handle flutter::Paragraph::getPositionForOffset	(	double	dx,
		double	dy
	)

Definition at line 113 of file paragraph.cc.

                                                                {
  txt::Paragraph::PositionWithAffinity pos =
      m_paragraph_->GetGlyphPositionAtCoordinate(dx, dy);
  std::vector<size_t> result = {
      pos.position,                      // size_t already
      static_cast<size_t>(pos.affinity)  // affinity (enum)
  };
  return tonic::DartConverter<decltype(result)>::ToDart(result);
}

References txt::Paragraph::PositionWithAffinity::affinity, and txt::Paragraph::PositionWithAffinity::position.

◆ getRectsForPlaceholders()

tonic::Float32List flutter::Paragraph::getRectsForPlaceholders ( )

Definition at line 107 of file paragraph.cc.

                                                    {
  std::vector<txt::Paragraph::TextBox> boxes =
      m_paragraph_->GetRectsForPlaceholders();
  return EncodeTextBoxes(boxes);
}

References flutter::EncodeTextBoxes().

◆ getRectsForRange()

tonic::Float32List flutter::Paragraph::getRectsForRange	(	unsigned	start,
		unsigned	end,
		unsigned	boxHeightStyle,
		unsigned	boxWidthStyle
	)

Definition at line 97 of file paragraph.cc.

                                                                       {
  std::vector<txt::Paragraph::TextBox> boxes = m_paragraph_->GetRectsForRange(
      start, end, static_cast<txt::Paragraph::RectHeightStyle>(boxHeightStyle),
      static_cast<txt::Paragraph::RectWidthStyle>(boxWidthStyle));
  return EncodeTextBoxes(boxes);
}

References flutter::EncodeTextBoxes(), end, and start.

◆ getWordBoundary()

Dart_Handle flutter::Paragraph::getWordBoundary ( unsigned offset )

Definition at line 165 of file paragraph.cc.

                                                           {
  txt::Paragraph::Range<size_t> point =
      m_paragraph_->GetWordBoundary(utf16Offset);
  std::vector<size_t> result = {point.start, point.end};
  return tonic::DartConverter<decltype(result)>::ToDart(result);
}

References txt::Paragraph::Range< T >::end, and txt::Paragraph::Range< T >::start.

◆ height()

double flutter::Paragraph::height ( )

Definition at line 33 of file paragraph.cc.

                         {
  return m_paragraph_->GetHeight();
}

◆ ideographicBaseline()

double flutter::Paragraph::ideographicBaseline ( )

Definition at line 53 of file paragraph.cc.

                                      {
  return m_paragraph_->GetIdeographicBaseline();
}

◆ layout()

void flutter::Paragraph::layout ( double width )

Definition at line 61 of file paragraph.cc.

                                   {
  m_paragraph_->Layout(width);
}

References width.

◆ longestLine()

double flutter::Paragraph::longestLine ( )

Definition at line 37 of file paragraph.cc.

                              {
  return m_paragraph_->GetLongestLine();
}

◆ maxIntrinsicWidth()

double flutter::Paragraph::maxIntrinsicWidth ( )

Definition at line 45 of file paragraph.cc.

                                    {
  return m_paragraph_->GetMaxIntrinsicWidth();
}

◆ minIntrinsicWidth()

double flutter::Paragraph::minIntrinsicWidth ( )

Definition at line 41 of file paragraph.cc.

                                    {
  return m_paragraph_->GetMinIntrinsicWidth();
}

◆ paint()

void flutter::Paragraph::paint	(	Canvas *	canvas,
		double	x,
		double	y
	)

Definition at line 65 of file paragraph.cc.

                                                        {
  if (!m_paragraph_ || !canvas) {
    // disposed.
    return;
  }
 
  DisplayListBuilder* builder = canvas->builder();
  if (builder) {
    m_paragraph_->Paint(builder, x, y);
  }
}

References x, and y.

◆ width()

double flutter::Paragraph::width ( )

Definition at line 29 of file paragraph.cc.

                        {
  return m_paragraph_->GetMaxWidth();
}

Referenced by txt::ParagraphSkia::Layout().

The documentation for this class was generated from the following files:

lib/ui/text/paragraph.h
lib/ui/text/paragraph.cc

Public Member Functions

Static Public Member Functions

Additional Inherited Members