////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Method: Draw.
/// </summary>
/// <param name="foreColor"> The foreground Color.</param>
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
private void Draw(Color foreColor)
{
var text = _scanner.Token.Text;
FontSize = tc.MeasureText(text, 0, _scanner.Token.Length);
tc.DrawText(text, 0, _scanner.Token.Length, startPoint, foreColor);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Method: Show Buffer.
/// </summary>
/// <param name="dev"> The dev.</param>
/// <param name="scanner"> The buffer.</param>
/// <param name="clientSize"> The client Size.</param>
/// <param name="rowStart"> The top.</param>
/// <param name="colStart"> The horizontal Percent.</param>
/// <param name="zoom"> The zoom.</param>
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
public void ShowBuffer(Graphics dev, IScanner scanner, Size clientSize, int rowStart, int colStart, float zoom, Selection selection)
{
if (scanner == null || scanner.LineCount == 0)
{
return;
}
_scanner = scanner;
if (Math.Abs(_zoom - zoom) > .05)
{
_zoom = zoom;
CreateFonts(EmSize);
}
SelectionBackground = BackgroundColor.Lighten(.4);
tc.SetBackgroundMode(true);
var inSelect = false;
var chkSelect = selection.Length > 0;
tc.StartDrawing(dev, BackgroundColor, 4, fonts[0]);
FontSize = tc.MeasureText("M");
FontWidth = FontSize.Width;
FontHeight = FontSize.Height;
var rows = clientSize.Height / FontHeight;
var cols = clientSize.Width / FontWidth;
var leftSkip = colStart;
// skip lines above view.
_scanner.MoveToLine(rowStart);
LeftMargin.X = DrawLineNumbers(scanner.LineNumber, rows, clientSize.Height);
startPoint.X = LeftMargin.X - leftSkip * FontWidth;
startPoint.Y = LeftMargin.Y;
// restrict drawing to just the text part.
tc.SelectClipRegion(LeftMargin.X - 1, LeftMargin.Y - 1, clientSize.Width, clientSize.Height);
// todo fix end check here.
while (!scanner.AtEnd)
{
var pos = scanner.Position;
var lineOffset = pos - scanner.StartPositionOfLine;
// handle selection marking
if (chkSelect)
{
if (!inSelect)
{
if (pos >= selection.Start)
{
// _selStart = new Point(startPoint.X, startPoint.Y);
inSelect = true;
tc.BackColor = SelectionBackground;
// set background mode correctly for select box.
tc.SetBackgroundMode(false);
}
}
else if (pos >= selection.End)
{
chkSelect = false;
tc.SetBackgroundMode(true);
}
}
var type = scanner.NextToken();
// handle special cases of Eol and not visible
if (type == TokenType.Eol)
{
startPoint.X = LeftMargin.X - leftSkip * FontWidth;
startPoint.Y += FontHeight;
if (--rows <= 0)
{
break;
}
continue;
}
// check if visible, skip if not.
if ((lineOffset + scanner.Token.Length) < leftSkip || lineOffset > cols)
{
continue;
}
switch (type)
{
case TokenType.WhiteSpace:
if (inSelect)
{
goto default;
}
startPoint.X += scanner.Token.Length * FontWidth;
continue;
case TokenType.End: // EOD
break;
//case TokenType.Eol:
// startPoint.X = LeftMargin.X;
// startPoint.Y += FontHeight;
// //int width = lineOffset;
// //if (width > RowColSize.Width) RowColSize.Width = width;
// --Rows;
// continue;
default:
var foreColor = SetFont(type);
Draw(foreColor);
startPoint.X += FontSize.Width;
continue;
}
//Rectangle rect = new Rectangle(startPoint, size);
}
tc.EndDrawing(dev);
RowColSize = new Size(_scanner.MaxLineLength, _scanner.LineCount);
}