internal bool CompareFallbackFontFamily(FontFamily fallbackFontFamily)
{
if (fallbackFontFamily == null || _fallbackFontFamily == null)
{
return(fallbackFontFamily == _fallbackFontFamily);
}
return(_fallbackFontFamily.Equals(fallbackFontFamily));
}
/// <summary>
/// Equality check
/// </summary>
public override bool Equals(object o)
{
Typeface t = o as Typeface;
if (t == null)
{
return(false);
}
return(_style == t._style &&
_weight == t._weight &&
_stretch == t._stretch &&
_fontFamily.Equals(t._fontFamily) &&
CompareFallbackFontFamily(t._fallbackFontFamily));
}
/// <summary>
/// Sets or changes the font family for the text object
/// </summary>
/// <param name="fontFamily">Font family</param>
/// <param name="startIndex">The start index of initial character to apply the change to.</param>
/// <param name="count">The number of characters the change should be applied to.</param>
public void SetFontFamily(FontFamily fontFamily, int startIndex, int count)
{
if (fontFamily == null)
throw new ArgumentNullException("fontFamily");
int limit = ValidateRange(startIndex, count);
for (int i = startIndex; i < limit;)
{
SpanRider formatRider = new SpanRider(_formatRuns, _latestPosition, i);
i = Math.Min(limit, i + formatRider.Length);
#pragma warning disable 6506
// Presharp warns that runProps is not validated, but it can never be null
// because the rider is already checked to be in range
GenericTextRunProperties runProps = formatRider.CurrentElement as GenericTextRunProperties;
Invariant.Assert(runProps != null);
Typeface oldTypeface = runProps.Typeface;
if (fontFamily.Equals(oldTypeface.FontFamily))
continue;
GenericTextRunProperties newProps = new GenericTextRunProperties(
new Typeface(fontFamily, oldTypeface.Style, oldTypeface.Weight, oldTypeface.Stretch),
runProps.FontRenderingEmSize,
runProps.FontHintingEmSize,
runProps.TextDecorations,
runProps.ForegroundBrush,
runProps.BackgroundBrush,
runProps.BaselineAlignment,
runProps.CultureInfo,
runProps.NumberSubstitution
);
#pragma warning restore 6506
_latestPosition = _formatRuns.SetValue(formatRider.CurrentPosition, i - formatRider.CurrentPosition, newProps, formatRider.SpanPosition);
InvalidateMetrics();
}
}
void UpdateSelection()
{
InternalUpdateSelection();
// update font state
Boolean HasFont = false;
FontFamily Family = new FontFamily("Arial");
FontStyle Style = FontStyles.Normal;
FontWeight Weight = FontWeights.Normal;
Double Size = 14;
Color Foreground = Colors.Black;
Color Background = Colors.Transparent;
TextAlign Alignment = TextAlign.Block;
TextAttributes Attributes = TextAttributes.None;
FontStretch Stretch = FontStretches.Normal;
// determine letter before selection...
for (int i = SelectionStart - 1; i >= 0; i--)
{
Letter Item = LineItems[i] as Letter;
if (Item == null)
continue;
Family = Item.Label.FontFamily;
Style = Item.Label.FontStyle;
Weight = Item.Label.FontWeight;
Size = Item.FontSize;
Foreground = Item.Foreground;
Background = Item.Background;
Attributes = Item.TextAttributes;
Alignment = Item.Alignment;
Stretch = Item.Label.FontStretch;
break;
}
m_FontFamily = Family;
m_FontStyle = Style;
m_FontWeight = Weight;
m_FontSize = Size;
m_FontStretch = Stretch;
m_FontForeground = Foreground;
m_FontBackground = Background;
m_TextAlignment = Alignment;
m_TextAttributes = Attributes;
for (int i = SelectionStart; i < SelectionStart + SelectionLength; i++)
{
Letter Item = LineItems[i] as Letter;
if (Item == null)
continue;
if (!HasFont)
{
Family = Item.Label.FontFamily;
Style = Item.Label.FontStyle;
Weight = Item.Label.FontWeight;
Size = Item.FontSize;
Foreground = Item.Foreground;
Background = Item.Background;
Attributes = Item.TextAttributes;
Alignment = Item.Alignment;
Stretch = Item.Label.FontStretch;
HasFont = true;
}
else
{
if (!Family.Equals(Item.Label.FontFamily) ||
!Style.Equals(Item.Label.FontStyle) ||
!Weight.Equals(Item.Label.FontWeight) ||
(Size != Item.FontSize) ||
!Foreground.Equals(Item.Foreground) ||
!Background.Equals(Item.Background) ||
(Alignment != Item.Alignment) ||
(Attributes != Item.TextAttributes) ||
(Stretch != Item.Label.FontStretch)
)
{
// only homogenous formatting may be saved...
return;
}
}
}
m_FontFamily = Family;
m_FontStyle = Style;
m_FontWeight = Weight;
m_FontSize = Size;
m_FontForeground = Foreground;
m_FontBackground = Background;
m_TextAlignment = Alignment;
m_TextAttributes = Attributes;
m_FontStretch = Stretch;
}