public ITextPosition GetTextPosition(Point p)
{
int l = 0, r = textline.Length;
TextBounds bound = null;
double ml = TextCore.View.MarginLeft;
if (p.X < ml)
{
return(null);
}
while (r - l > 1)
{
int mid = (l + r) >> 1;
bound = textline.GetTextBounds(l, mid - l).FirstOrDefault();
if (p.X - ml >= bound.Rectangle.Right)
{
l = mid;
}
else
{
r = mid;
}
}
if (l == r)
{
return(GetTextPosition(l + 1));
}
l = Math.Min(l, r);
bound = textline.GetTextBounds(l, 1).FirstOrDefault();
return((p.X - ml >= bound.Rectangle.Right) ? GetTextPosition(l + 2) : GetTextPosition(l + 1));
}
protected void DrawTextRectangle(DrawingContext ctx, Brush brush, Pen pen, int start, int count)
{
if (count <= 0)
{
return;
}
WinTextLine text = ViewParent?.TextLine;
TextBounds bound = text.GetTextBounds(start, count).FirstOrDefault();
Rect rect = bound.Rectangle;
rect.X += ViewParent.TextCore.View.MarginLeft;
ctx.DrawRectangle(brush, null, rect);
}
protected override void Render(DrawingContext ctx)
{
if (Core == null || Core.IsDisposed)
{
return;
}
base.Render(ctx);
IMRATextItemInfo item = ViewParent?.Core;
ITextBoxCore core = ViewParent?.TextCore;
WinTextLine text = ViewParent?.TextLine;
if (core == null)
{
return;
}
ITextPosition start = core.SelectedStart;
ITextPosition end = core.SelectedEnd;
if (start.CompareTo(end) == 0)
{
ITextPosition pos = start.NextSeek();
RenderBracket(ctx, pos);
RenderDefaultMatch(ctx, pos);
pos = pos.PrevSeek();
RenderBracket(ctx, pos);
RenderDefaultMatch(ctx, pos);
}
if (start.Line == end.Line && start.Column == end.Column)
{
status = start.Line == item.Line ? SelectionStatus.Caret : SelectionStatus.None;
}
else if (item.Line >= start.Line && item.Line <= end.Line)
{
status = SelectionStatus.Range;
}
else
{
status = SelectionStatus.None;
}
switch (status)
{
case SelectionStatus.None:
break;
case SelectionStatus.Caret:
{
if (!blinkshow && !forceshow)
{
break;
}
int index = start.Column - 1;
TextBounds bound = text.GetTextBounds(index, 1).FirstOrDefault();
Brush brush = null;
double thickness = 1.0;
ViewParent.TextCore.DictBrush.TryGetValue("foreground_rawtext_caret", out brush);
ViewParent.TextCore.DictValue.TryGetValue("rawtext_caret_thickness", out thickness);
Pen pen = new Pen(brush, thickness);
Point p1 = bound.Rectangle.TopLeft;
Point p2 = bound.Rectangle.BottomLeft;
p1.Y -= 2;
p1.X += ViewParent.TextCore.View.MarginLeft;
p2.X += ViewParent.TextCore.View.MarginLeft;
ctx.DrawLine(pen, p1, p2);
}
break;
case SelectionStatus.Range:
{
//int left = start.Column - 1;
//int right = end.Column - 1;
if (start.Line < item.Line)
{
start = Core.Start;
}
if (end.Line > item.Line)
{
end = Core.End;
}
//if (right - left <= 0) break;
//TextBounds bound = text.GetTextBounds(left, right - left).FirstOrDefault();
Brush brush = null;
//Rect rect = bound.Rectangle;
ViewParent.TextCore.DictBrush.TryGetValue("background_rawtext_selected", out brush);
//rect.X += ViewParent.TextCore.View.MarginLeft;
//ctx.DrawRectangle(brush, null, rect);
DrawTextRectangle(ctx, brush, null, start, end);
}
break;
}
}