public void Should_Format_TextRuns_With_Multiple_Buffers()
{
using (Start())
{
var defaultTextRunStyle = new TextStyle(Typeface.Default, 12, Brushes.Black);
var textSource = new MultiBufferTextSource(defaultTextRunStyle);
var formatter = new SimpleTextFormatter();
var textLine = formatter.FormatLine(textSource, 0, double.PositiveInfinity,
new TextParagraphProperties(defaultTextRunStyle));
Assert.Equal(5, textLine.TextRuns.Count);
Assert.Equal(50, textLine.Text.Length);
}
}
public void Should_Get_CharacterHit_From_Distance()
{
using (Start())
{
var textSource = new MultiBufferTextSource(new TextStyle(Typeface.Default));
var formatter = new SimpleTextFormatter();
var textLine =
formatter.FormatLine(textSource, 0, double.PositiveInfinity, new TextParagraphProperties());
var currentDistance = 0.0;
CharacterHit characterHit;
foreach (var run in textLine.TextRuns)
{
var textRun = (ShapedTextRun)run;
var glyphRun = textRun.GlyphRun;
for (var i = 0; i < glyphRun.GlyphClusters.Length; i++)
{
var cluster = glyphRun.GlyphClusters[i];
var glyph = glyphRun.GlyphIndices[i];
var advance = glyphRun.GlyphTypeface.GetGlyphAdvance(glyph) * glyphRun.Scale;
characterHit = textLine.GetCharacterHitFromDistance(currentDistance);
Assert.Equal(cluster, characterHit.FirstCharacterIndex + characterHit.TrailingLength);
currentDistance += advance;
}
}
characterHit = textLine.GetCharacterHitFromDistance(textLine.LineMetrics.Size.Width);
Assert.Equal(textSource.TextPointer.End, characterHit.FirstCharacterIndex);
}
}
public void Should_Get_Distance_From_CharacterHit()
{
using (Start())
{
var textSource = new MultiBufferTextSource(new TextStyle(Typeface.Default));
var formatter = new SimpleTextFormatter();
var textLine =
formatter.FormatLine(textSource, 0, double.PositiveInfinity, new TextParagraphProperties());
var currentDistance = 0.0;
foreach (var run in textLine.TextRuns)
{
var textRun = (ShapedTextRun)run;
var glyphRun = textRun.GlyphRun;
for (var i = 0; i < glyphRun.GlyphClusters.Length; i++)
{
var cluster = glyphRun.GlyphClusters[i];
var glyph = glyphRun.GlyphIndices[i];
var advance = glyphRun.GlyphTypeface.GetGlyphAdvance(glyph) * glyphRun.Scale;
var distance = textLine.GetDistanceFromCharacterHit(new CharacterHit(cluster));
Assert.Equal(currentDistance, distance);
currentDistance += advance;
}
}
Assert.Equal(currentDistance, textLine.GetDistanceFromCharacterHit(new CharacterHit(textSource.TextPointer.Length)));
}
}
