/// <summary>
/// Создать карту.
/// </summary>
/// <param name="program">Программа.</param>
/// <param name="width">Ширина.</param>
/// <param name="fontSize">Размер шрифта.</param>
/// <param name="maxLines">Максимальное число линий.</param>
/// <returns>Карта.</returns>
public ITextRender2MeasureMap CreateMap(ITextRender2RenderProgram program, double width, double fontSize, int? maxLines)
{
if (program == null) throw new ArgumentNullException(nameof(program));
var interProgram = CreateIntermediateProgram(program).ToArray();
var allText = interProgram.Aggregate(new StringBuilder(), (sb, s) => sb.Append(s.RenderString)).ToString();
using (var tf = new CanvasTextFormat())
{
tf.FontFamily = "Segoe UI";
tf.FontSize = (float)fontSize;
tf.WordWrapping = CanvasWordWrapping.Wrap;
tf.Direction = CanvasTextDirection.LeftToRightThenTopToBottom;
tf.Options = CanvasDrawTextOptions.Default;
var screen = DisplayInformation.GetForCurrentView();
using (var ds = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), (float) width, 10f, screen.LogicalDpi))
{
using (var tl = new CanvasTextLayout(ds, allText, tf, (float)width, 10f))
{
var helperArgs = interProgram.OfType<MappingHelperArg>().ToList();
mappingHelper.ApplyAttributes(tl, helperArgs, fontSize);
var map = AnalyzeMap(tl, allText).ToArray();
var result = new MeasureMap(map, width, maxLines, StrikethrougKoef);
return result;
}
}
}
}
private ITextRender2MeasureMap DoMeasure(double width, ITextRender2RenderProgram program)
{
var mapper = new Direct2DTextRender2MeasureMapper();
return mapper.CreateMap(program, width, ControlCallback.PostFontSize, MaxLines > 0 ? (int?)MaxLines : null);
}
private IEnumerable<IntermediateElement> CreateIntermediateProgram(ITextRender2RenderProgram program)
{
var idx = 0;
foreach (var p in program.GetCommands())
{
if (p.Content.Id == CommonTextRenderContent.LineBreak)
{
yield return new IntermediateElement() {RenderString = "\n", Command = p, Index = idx};
idx++;
}
if (p.Content.Id == CommonTextRenderContent.Text)
{
var t = p.Content as ITextRenderTextContent;
var s = t?.Text ?? "";
if (s.Length > 0)
{
yield return new IntermediateElement() { RenderString = t?.Text ?? "", Command = p, Index = idx };
idx += s.Length;
}
}
}
}
