private void DrawText(String s, Font font, Brush brush, RectangleF rect, StringFormat fmt, bool ignoreRect)
{
SvgTextElement txt = new SvgTextElement(s, rect.X, rect.Y);
//GDI takes x and y as the upper left corner; svg takes them as the lower left.
//We must therefore move the text one line down, but SVG does not understand about lines,
//so we do as best we can, applying a downward translation before the current GDI translation.
txt.Transform = new SvgTransformList(_transforms.Result.Clone());
txt.Style = HandleBrush(brush);
txt.Style += new SvgStyle(font);
if (fmt.Alignment == StringAlignment.Center)
{
txt.Style.Set("text-anchor", "middle");
txt.X = rect.X + rect.Width/2;
}
if (fmt.Alignment == StringAlignment.Far)
{
txt.Style.Set("text-anchor", "end");
txt.X = rect.Right;
}
txt.Style.Set("baseline-shift", "-86%");//a guess.
if(!ignoreRect && (fmt.FormatFlags != StringFormatFlags.NoClip))
{
SvgClipPathElement clipper = new SvgClipPathElement();
clipper.Id += "_text_clipper";
SvgRectElement rc = new SvgRectElement(rect.X, rect.Y, rect.Width, rect.Height);
clipper.AddChild(rc);
_defs.AddChild(clipper);
txt.Style.Set("clip-path", new SvgUriReference(clipper));
}
_cur.AddChild(txt);
}
private void DrawText(String s, Font font, Brush brush, RectangleF rect, StringFormat fmt, bool ignoreRect)
{
if (s != null && s.Contains("\n"))
throw new SvgGdiNotImpl("DrawText multiline text");
SvgTextElement txt = new SvgTextElement(s, rect.X, rect.Y);
//GDI takes x and y as the upper left corner; svg takes them as the lower left.
//We must therefore move the text one line down, but SVG does not understand about lines,
//so we do as best we can, applying a downward translation before the current GDI translation.
txt.Transform = new SvgTransformList(_transforms.Result.Clone());
txt.Style = HandleBrush(brush);
txt.Style += new SvgStyle(font);
switch (fmt.Alignment)
{
case StringAlignment.Near:
break;
case StringAlignment.Center:
{
if (ignoreRect)
throw new SvgGdiNotImpl("DrawText automatic rect");
txt.Style.Set("text-anchor", "middle");
txt.X = rect.X + rect.Width / 2;
}
break;
case StringAlignment.Far:
{
if (ignoreRect)
throw new SvgGdiNotImpl("DrawText automatic rect");
txt.Style.Set("text-anchor", "end");
txt.X = rect.Right;
}
break;
default:
throw new SvgGdiNotImpl("DrawText horizontal alignment");
}
if (!ignoreRect && ((fmt.FormatFlags & StringFormatFlags.NoClip) != StringFormatFlags.NoClip))
{
SvgClipPathElement clipper = new SvgClipPathElement();
clipper.Id += "_text_clipper";
SvgRectElement rc = new SvgRectElement(rect.X, rect.Y, rect.Width, rect.Height);
clipper.AddChild(rc);
_defs.AddChild(clipper);
txt.Style.Set("clip-path", new SvgUriReference(clipper));
}
switch (fmt.LineAlignment)
{
case StringAlignment.Near:
{
// TODO: ??
// txt.Style.Set("baseline-shift", "-86%");//a guess.
var span = new SvgTspanElement(s);
span.DY = new SvgLength(txt.Style.Get("font-size").ToString());
txt.Text = null;
txt.AddChild(span);
}
break;
case StringAlignment.Center:
{
if (ignoreRect)
throw new SvgGdiNotImpl("DrawText automatic rect");
txt.Y.Value = txt.Y.Value + (rect.Height / 2);
var span = new SvgTspanElement(s);
span.DY = new SvgLength(txt.Style.Get("font-size").ToString());
span.DY.Value = span.DY.Value * ((1 - GetFontDescentPercentage(font)) - 0.5f);
txt.Text = null;
txt.AddChild(span);
}
break;
case StringAlignment.Far:
{
if (ignoreRect)
throw new SvgGdiNotImpl("DrawText automatic rect");
txt.Y.Value = txt.Y.Value + rect.Height;
// This would solve the alignment as well, but it's not supported by Internet Explorer
//
// txt.Attributes["dominant-baseline"] = "text-after-edge";
var span = new SvgTspanElement(s);
span.DY = new SvgLength(txt.Style.Get("font-size").ToString());
span.DY.Value = span.DY.Value * ((1 - GetFontDescentPercentage(font)) - 1);
txt.Text = null;
txt.AddChild(span);
}
break;
default:
throw new SvgGdiNotImpl("DrawText vertical alignment");
}
_cur.AddChild(txt);
}
