private void InternalPrepareRun(Pango.LayoutRun run)
{
PrepareRunNativeDelegate unmanaged = class_abi.BaseOverride <PrepareRunNativeDelegate>(this.LookupGType(), "prepare_run");
if (unmanaged == null)
{
return;
}
IntPtr native_run = GLib.Marshaller.StructureToPtrAlloc(run);
unmanaged(this.Handle, native_run);
Marshal.FreeHGlobal(native_run);
}
private void InternalPrepareRun(Pango.LayoutRun run)
{
PrepareRunNativeDelegate unmanaged = null;
unsafe {
IntPtr *raw_ptr = (IntPtr *)(((long)this.LookupGType().GetThresholdType().GetClassPtr()) + (long)class_abi.GetFieldOffset("prepare_run"));
unmanaged = (PrepareRunNativeDelegate)Marshal.GetDelegateForFunctionPointer(*raw_ptr, typeof(PrepareRunNativeDelegate));
}
if (unmanaged == null)
{
return;
}
IntPtr native_run = GLib.Marshaller.StructureToPtrAlloc(run);
unmanaged(this.Handle, native_run);
Marshal.FreeHGlobal(native_run);
}
protected virtual void OnPrepareRun(Pango.LayoutRun run)
{
InternalPrepareRun(run);
}
IEnumerable <Line> Analyselayout(Pango.Layout pl)
{
var text = pl.Text;
var iter = pl.Iter;
var lli = 0;
var ll = 0;
var li = 0;
var iRun = 0;
var numGlyph = 0;
Pango.LayoutLine line = iter.Line;
Pango.LayoutRun run = iter.Run;
var scale = Pango.Scale.PangoScale;
Func <Line> render = () => {
if (numGlyph == 0)
{
return(default(Line));
}
ll = numGlyph;
var newline = line != null && line.StartIndex != li;
if (newline)
{
li = line.StartIndex;
}
if (iter.Line.StartIndex != line.StartIndex && iter.Line.IsParagraphStart)
{
ll--;
}
var llrect = new Pango.Rectangle();
var rect = new Pango.Rectangle();
line.GetExtents(ref rect, ref llrect);
var lline = new Line {
Pos = lli, Len = Math.Min(ll, text.Length - lli), Width = run.Glyphs.Width, Height = llrect.Height / scale
};
if (iter.Line.IsParagraphStart)
{
ll++;
}
lli += ll;
return(lline);
};
do
{
var newRun = iter.Run.Glyphs != null && iter.Run.Item.Offset != iRun;
if (newRun)
{
iRun = iter.Run.Item.Offset;
yield return(render());
numGlyph = 0;
line = null;
}
if (line == null)
{
line = iter.Line;
run = iter.Run;
}
numGlyph++;
} while(iter.NextChar());
yield return(render());
}
