public FormattedText(
string textToFormat,
CultureInfo culture,
FlowDirection flowDirection,
Typeface typeface,
double emSize,
Brush foreground)
{
this.Foreground = foreground;
this.PlatformImpl = PlatformInterface.Instance.CreateFormattedText(
textToFormat,
typeface,
emSize);
this.Text = textToFormat;
}
public Direct2D1FormattedText(string text, Typeface typeface, double fontSize)
{
Factory factory = ((Direct2D1PlatformInterface)PlatformInterface.Instance).DirectWriteFactory;
TextFormat format = new TextFormat(
factory,
typeface.FontFamily.Source,
(float)fontSize);
this.DirectWriteTextLayout = new TextLayout(
factory,
text ?? string.Empty,
format,
float.MaxValue,
float.MaxValue);
}
protected void UpdateTextGeometry()
{
BoundText = Text.GetProperty(nameof(TextShapeViewModel.Text)) is string boundText ? boundText : Text.Text;
if (BoundText is null)
{
return;
}
if (Style.TextStyle.FontSize < 0.0)
{
return;
}
var fontStyle = AM.FontStyle.Normal;
var fontWeight = AM.FontWeight.Normal;
if (Style.TextStyle.FontStyle.HasFlag(FontStyleFlags.Italic))
{
fontStyle |= AM.FontStyle.Italic;
}
if (Style.TextStyle.FontStyle.HasFlag(FontStyleFlags.Bold))
{
fontWeight |= AM.FontWeight.Bold;
}
// TODO: Cache Typeface
// TODO: Cache FormattedText
Typeface = new AM.Typeface(Style.TextStyle.FontName, fontStyle, fontWeight);
var textAlignment = Style.TextStyle.TextHAlignment switch
{
TextHAlignment.Right => AM.TextAlignment.Right,
TextHAlignment.Center => AM.TextAlignment.Center,
_ => AM.TextAlignment.Left,
};
FormattedText = new AM.FormattedText()
{
Typeface = Typeface,
Text = BoundText,
TextAlignment = textAlignment,
TextWrapping = AM.TextWrapping.NoWrap,
FontSize = Style.TextStyle.FontSize,
Constraint = Rect.Size
};
var size = FormattedText.Bounds.Size;
var rect = Rect;
// NOTE: Using AM.TextAlignment
var originX = rect.X;
//var originX = Style.TextStyle.TextHAlignment switch
//{
// TextHAlignment.Left => rect.X,
// TextHAlignment.Right => rect.Right - size.Width,
// _ => (rect.Left + rect.Width / 2.0) - (size.Width / 2.0)
//};
var originY = Style.TextStyle.TextVAlignment switch
{
TextVAlignment.Top => rect.Y,
TextVAlignment.Bottom => rect.Bottom - size.Height,
_ => (rect.Bottom - rect.Height / 2f) - (size.Height / 2f)
};
Origin = new A.Point(originX, originY);
}
/// <inheritdoc/>
public override void Draw(object dc, TextShape text, double dx, double dy, object db, object r)
{
var _gfx = dc as AM.DrawingContext;
var properties = (ImmutableArray <Property>)db;
var record = (Record)r;
var tbind = text.BindText(properties, record);
if (string.IsNullOrEmpty(tbind))
{
return;
}
AM.IBrush brush = ToBrush(text.Style.Stroke);
var fontStyle = AM.FontStyle.Normal;
var fontWeight = AM.FontWeight.Normal;
//var fontDecoration = PM.FontDecoration.None;
if (text.Style.TextStyle.FontStyle != null)
{
if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Italic))
{
fontStyle |= AM.FontStyle.Italic;
}
if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Bold))
{
fontWeight |= AM.FontWeight.Bold;
}
// TODO: Implement font decoration after Avalonia adds support.
/*
* if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Underline))
* {
* fontDecoration |= PM.FontDecoration.Underline;
* }
*
* if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Strikeout))
* {
* fontDecoration |= PM.FontDecoration.Strikethrough;
* }
*/
}
if (text.Style.TextStyle.FontSize >= 0.0)
{
var tf = new AM.Typeface(
text.Style.TextStyle.FontName,
text.Style.TextStyle.FontSize * _textScaleFactor,
fontStyle,
fontWeight);
var ft = new AM.FormattedText()
{
Typeface = tf,
Text = tbind,
TextAlignment = AM.TextAlignment.Left,
Wrapping = AM.TextWrapping.NoWrap
};
var rect = CreateRect(text.TopLeft, text.BottomRight, dx, dy);
var size = ft.Measure();
var origin = GetTextOrigin(text.Style, ref rect, ref size);
_gfx.DrawText(brush, origin, ft);
}
}
/// <summary>
/// Tries to match a specified character to a <see cref="Typeface"/> that supports specified font properties.
/// </summary>
/// <param name="codepoint">The codepoint to match against.</param>
/// <param name="fontStyle">The font style.</param>
/// <param name="fontWeight">The font weight.</param>
/// <param name="fontFamily">The font family. This is optional and used for fallback lookup.</param>
/// <param name="culture">The culture.</param>
/// <param name="typeface">The matching <see cref="Typeface"/>.</param>
/// <returns>
/// <c>True</c>, if the <see cref="FontManager"/> could match the character to specified parameters, <c>False</c> otherwise.
/// </returns>
public bool TryMatchCharacter(int codepoint, FontStyle fontStyle,
FontWeight fontWeight,
FontFamily fontFamily, CultureInfo culture, out Typeface typeface) =>
PlatformImpl.TryMatchCharacter(codepoint, fontStyle, fontWeight, fontFamily, culture, out typeface);
public GlyphTypeface(Typeface typeface)
{
PlatformImpl = FontManager.Current?.PlatformImpl.CreateGlyphTypeface(typeface);
}
public override IPlatformFormattedText CreateFormattedText(
string text,
Typeface typeface,
double fontSize)
{
return new Direct2D1FormattedText(text, typeface, fontSize);
}
public GlyphTypeface(Typeface typeface)
: this(FontManager.Current?.PlatformImpl.CreateGlyphTypeface(typeface))
{
}
/// <summary>
/// Create a new platform-specific <see cref="FormattedText"/>.
/// </summary>
/// <param name="textToFormat">The text.</param>
/// <param name="typeface">The typeface.</param>
/// <param name="fontSize">The font size.</param>
/// <returns>The formatted text object.</returns>
public abstract IPlatformFormattedText CreateFormattedText(
string textToFormat,
Typeface typeface,
double fontSize);
