public void Should_Produce_Wrapped_And_Trimmed_Lines(string text, string[] expectedLines)
{
using (Start())
{
var typeface = new Typeface("Verdana");
var defaultProperties = new GenericTextRunProperties(typeface, 32, foregroundBrush: Brushes.Black);
var styleSpans = new[]
{
new ValueSpan <TextRunProperties>(0, 5,
new GenericTextRunProperties(typeface, 48)),
new ValueSpan <TextRunProperties>(6, 11,
new GenericTextRunProperties(new Typeface("Verdana", weight: FontWeight.Bold), 32)),
new ValueSpan <TextRunProperties>(28, 28,
new GenericTextRunProperties(new Typeface("Verdana", FontStyle.Italic), 32))
};
var textSource = new FormattedTextSource(text.AsMemory(), defaultProperties, styleSpans);
var formatter = new TextFormatterImpl();
var currentPosition = 0;
var currentHeight = 0d;
var currentLineIndex = 0;
while (currentPosition < text.Length && currentLineIndex < expectedLines.Length)
{
var textLine =
formatter.FormatLine(textSource, currentPosition, 300,
new GenericTextParagraphProperties(defaultProperties, textWrap: TextWrapping.WrapWithOverflow));
currentPosition += textLine.TextRange.Length;
if (textLine.Width > 300 || currentHeight + textLine.Height > 240)
{
textLine = textLine.Collapse(new TextTrailingWordEllipsis(300, defaultProperties));
}
currentHeight += textLine.Height;
var currentText = text.Substring(textLine.TextRange.Start, textLine.TextRange.Length);
Assert.Equal(expectedLines[currentLineIndex], currentText);
currentLineIndex++;
}
Assert.Equal(expectedLines.Length, currentLineIndex);
}
}
public void Should_Not_Alter_TextRuns_After_TextStyles_Were_Applied(string text)
{
using (Start())
{
var formatter = new TextFormatterImpl();
var defaultProperties = new GenericTextRunProperties(Typeface.Default);
var paragraphProperties =
new GenericTextParagraphProperties(defaultProperties, textWrap: TextWrapping.NoWrap);
var foreground = new SolidColorBrush(Colors.Red).ToImmutable();
var expectedTextLine = formatter.FormatLine(new SingleBufferTextSource(text, defaultProperties),
0, double.PositiveInfinity, paragraphProperties);
var expectedRuns = expectedTextLine.TextRuns.Cast <ShapedTextCharacters>().ToList();
var expectedGlyphs = expectedRuns.SelectMany(x => x.GlyphRun.GlyphIndices).ToList();
for (var i = 0; i < text.Length; i++)
{
for (var j = 1; i + j < text.Length; j++)
{
var spans = new[]
{
new ValueSpan <TextRunProperties>(i, j,
new GenericTextRunProperties(Typeface.Default, 12, foregroundBrush: foreground))
};
var textSource = new FormattedTextSource(text.AsMemory(), defaultProperties, spans);
var textLine =
formatter.FormatLine(textSource, 0, double.PositiveInfinity, paragraphProperties);
var shapedRuns = textLine.TextRuns.Cast <ShapedTextCharacters>().ToList();
var actualGlyphs = shapedRuns.SelectMany(x => x.GlyphRun.GlyphIndices).ToList();
Assert.Equal(expectedGlyphs, actualGlyphs);
}
}
}
}
public void Should_Format_TextRuns_With_TextRunStyles()
{
using (Start())
{
const string text = "0123456789";
var defaultProperties =
new GenericTextRunProperties(Typeface.Default, 12, foregroundBrush: Brushes.Black);
var GenericTextRunPropertiesRuns = new[]
{
new ValueSpan <TextRunProperties>(0, 3, defaultProperties),
new ValueSpan <TextRunProperties>(3, 3,
new GenericTextRunProperties(Typeface.Default, 13, foregroundBrush: Brushes.Black)),
new ValueSpan <TextRunProperties>(6, 3,
new GenericTextRunProperties(Typeface.Default, 14, foregroundBrush: Brushes.Black)),
new ValueSpan <TextRunProperties>(9, 1, defaultProperties)
};
var textSource = new FormattedTextSource(text.AsMemory(), defaultProperties, GenericTextRunPropertiesRuns);
var formatter = new TextFormatterImpl();
var textLine = formatter.FormatLine(textSource, 0, double.PositiveInfinity,
new GenericTextParagraphProperties(defaultProperties));
Assert.Equal(text.Length, textLine.TextRange.Length);
for (var i = 0; i < GenericTextRunPropertiesRuns.Length; i++)
{
var GenericTextRunPropertiesRun = GenericTextRunPropertiesRuns[i];
var textRun = textLine.TextRuns[i];
Assert.Equal(GenericTextRunPropertiesRun.Length, textRun.Text.Length);
}
}
}
