public override BuiltRichText BuildText(IList <RichTextNode> nodes, int width, float sizeMultiplier = 1)
{
if (!customLoader.Valid)
{
CreateCustomCollection();
}
var paragraphs = new List <List <RichTextNode> >();
paragraphs.Add(new List <RichTextNode>());
int first = 0;
while (nodes[first] is RichTextParagraphNode && first < nodes.Count)
{
first++;
}
DWrite.TextAlignment ta = CastAlignment((nodes[first] as RichTextTextNode).Alignment);
paragraphs[paragraphs.Count - 1].Add(nodes[first]);
foreach (var node in nodes.Skip(first + 1))
{
if (node is RichTextParagraphNode)
{
paragraphs.Add(new List <RichTextNode>());
}
else
{
var n = (RichTextTextNode)node;
var align = CastAlignment(n.Alignment);
if (align != ta && paragraphs[paragraphs.Count - 1].Count > 0)
{
paragraphs.Add(new List <RichTextNode>());
}
paragraphs[paragraphs.Count - 1].Add(node);
ta = align;
}
}
string lastFont = null;
float lastSize = 0;
//Format text
var layouts = new List <TextLayout>();
for (int j = 0; j < paragraphs.Count; j++)
{
var p = paragraphs[j];
var builder = new StringBuilder();
foreach (var n in p)
{
builder.Append(((RichTextTextNode)n).Contents);
}
var layout = new TextLayout(
dwFactory,
builder.ToString(),
new TextFormat(
dwFactory,
string.IsNullOrEmpty(lastFont) ? "Arial" : lastFont,
lastSize > 0 ? lastSize : (16 * sizeMultiplier)
),
width,
float.MaxValue
);
if (p.Count > 0)
{
layout.TextAlignment = CastAlignment(((RichTextTextNode)p[0]).Alignment);
}
int startIdx = 0;
foreach (var n in p)
{
var text = (RichTextTextNode)n;
var range = new TextRange(startIdx, text.Contents.Length);
if (text.Bold)
{
layout.SetFontWeight(FontWeight.Bold, range);
}
if (text.Italic)
{
layout.SetFontStyle(FontStyle.Italic, range);
}
if (text.Underline)
{
layout.SetUnderline(true, range);
}
if (!string.IsNullOrEmpty(text.FontName))
{
if (customCollection.FindFamilyName(text.FontName, out int _))
{
layout.SetFontCollection(customCollection, range);
}
layout.SetFontFamilyName(text.FontName, range);
lastFont = text.FontName;
}
if (text.FontSize > 0)
{
layout.SetFontSize(text.FontSize * sizeMultiplier, range);
lastSize = text.FontSize * sizeMultiplier;
}
layout.SetDrawingEffect(new ColorDrawingEffect(text.Color, text.Shadow), range);
startIdx += text.Contents.Length;
}
layouts.Add(layout);
}
//Return
var built = new DirectWriteBuiltText(this)
{
Layout = layouts, Width = width
};
built.CacheQuads();
return(built);
}
