Struct StyleSpan

Namespace

Egami.Fonts.Layout

Assembly

Egami.Fonts.dll

A text style over a stretch of a RichText, in UTF-16 units.

public readonly record struct StyleSpan : IEquatable<StyleSpan>

Implements

IEquatable<StyleSpan>

Inherited Members

ValueType.Equals(object)

ValueType.GetHashCode()

ValueType.ToString()

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Examples

// Font families come from a collection; later families cover what the first lacks.
FontCollection fonts = new();
fonts.AddFile(System.IO.Path.Combine(folder, "NotoSans-Regular.ttf"));
fonts.AddFile(System.IO.Path.Combine(folder, "NotoSansArabic-Regular.ttf"));
fonts.TryGetFamily("Noto Sans", out FontFamily latin);
fonts.TryGetFamily("Noto Sans Arabic", out FontFamily arabic);

// Styles nest: the inner span keeps the outer one's size and adds a color and an underline.
RichText text = new RichTextBuilder()
    .Append("Peace is ")
    .Push(new TextStyle { Size = 20 })
    .Append("\u0633\u0644\u0627\u0645 ")
    .Push(new TextStyle { Color = new Rgba8(200, 30, 30, 255), Decoration = new TextDecoration() })
    .Append("in Arabic")
    .Pop()
    .Pop()
    .AddPlaceholder(new Placeholder(16, 16, PlaceholderAlignment.Middle))
    .ToRichText();

ParagraphStyle style = new()
{
    DefaultStyle = new TextStyle { FontFamilies = [latin, arabic], Size = 16, LineHeight = LineHeight.Multiple(1.4f) },
    Align = TextAlign.Justify,
    LineBreaking = new LineBreakOptions(WordBreak: WordBreak.Normal),
};

// Shaped once: lay it out at any width later.
Paragraph paragraph = Paragraph.Create(text, style);

Constructors

StyleSpan(int, int, TextStyle)

A text style over a stretch of a RichText, in UTF-16 units.

public StyleSpan(int Start, int Length, TextStyle Style)

Parameters

Start int

The first UTF-16 index.

Length int

The number of UTF-16 units.

Style TextStyle

The style; its unset fields come from the paragraph's default style.

Examples

// Font families come from a collection; later families cover what the first lacks.
FontCollection fonts = new();
fonts.AddFile(System.IO.Path.Combine(folder, "NotoSans-Regular.ttf"));
fonts.AddFile(System.IO.Path.Combine(folder, "NotoSansArabic-Regular.ttf"));
fonts.TryGetFamily("Noto Sans", out FontFamily latin);
fonts.TryGetFamily("Noto Sans Arabic", out FontFamily arabic);

// Styles nest: the inner span keeps the outer one's size and adds a color and an underline.
RichText text = new RichTextBuilder()
    .Append("Peace is ")
    .Push(new TextStyle { Size = 20 })
    .Append("\u0633\u0644\u0627\u0645 ")
    .Push(new TextStyle { Color = new Rgba8(200, 30, 30, 255), Decoration = new TextDecoration() })
    .Append("in Arabic")
    .Pop()
    .Pop()
    .AddPlaceholder(new Placeholder(16, 16, PlaceholderAlignment.Middle))
    .ToRichText();

ParagraphStyle style = new()
{
    DefaultStyle = new TextStyle { FontFamilies = [latin, arabic], Size = 16, LineHeight = LineHeight.Multiple(1.4f) },
    Align = TextAlign.Justify,
    LineBreaking = new LineBreakOptions(WordBreak: WordBreak.Normal),
};

// Shaped once: lay it out at any width later.
Paragraph paragraph = Paragraph.Create(text, style);

Properties

End

Gets the index just past the span.

public int End { get; }

Property Value

int

Length

The number of UTF-16 units.

public int Length { get; init; }

Property Value

int

Start

The first UTF-16 index.

public int Start { get; init; }

Property Value

int

Style

The style; its unset fields come from the paragraph's default style.

public TextStyle Style { get; init; }

Property Value

TextStyle