public override void Draw(Graphics gr, Point position, Range range)
{
//draw background
if (BackgroundBrush != null)
{
gr.FillRectangle(BackgroundBrush, position.X, position.Y, (range.End.iChar - range.Start.iChar) * range.tb.CharWidth, range.tb.CharHeight);
}
//draw chars
using (var f = new Font(range.tb.Font, FontStyle))
{
Line line = range.tb[range.Start.iLine];
float dx = range.tb.CharWidth;
float dxu = range.tb.CharUnicodeWidth;
float y = position.Y + range.tb.LineInterval / 2;
float x = position.X - range.tb.CharWidth / 3;
if (ForeBrush == null)
{
ForeBrush = new SolidBrush(range.tb.ForeColor);
}
if (range.tb.ImeAllowed)
{
//IME mode
for (int i = range.Start.iChar; i < range.End.iChar; i++)
{
SizeF size = FastColoredTextBox.GetCharSize(f, line[i].c);
var gs = gr.Save();
float k = size.Width > range.tb.CharWidth + 1 ? range.tb.CharWidth / size.Width : 1;
gr.TranslateTransform(x, y + (1 - k) * range.tb.CharHeight / 2);
gr.ScaleTransform(k, (float)Math.Sqrt(k));
gr.DrawString(line[i].c.ToString(), f, ForeBrush, 0, 0, stringFormat);
gr.Restore(gs);
x += line[i].c > 0xFF ? dxu : dx;
}
}
else
{
//classic mode
for (int i = range.Start.iChar; i < range.End.iChar; i++)
{
//draw char
gr.DrawString(line[i].c.ToString(), f, ForeBrush, x, y, stringFormat);
x += line[i].c > 0xFF ? dxu : dx;
}
}
}
}
internal void CalcCutOffsW(int maxWidth, bool allowIME, bool charWrap, Line line, Font font)
{
int segmentLength = 0;
int cutOff = 0;
CutOffPositions.Clear();
for (int i = 0; i < line.Count; i++)
{
char c = line[i].c;
if (charWrap)
{
//char wrapping
cutOff = Math.Min(i + 1, line.Count - 1);
}
else
{
//word wrapping
if (allowIME && isCJKLetter(c))//in CJK languages cutoff can be in any letter
{
cutOff = i;
}
else
if (!char.IsLetterOrDigit(c) && c != '_')
{
cutOff = Math.Min(i + 1, line.Count - 1);
}
}
int width = (int)FastColoredTextBox.GetCharSize(font, line[i].c).Width;
if (segmentLength + width >= maxWidth)
{
if (cutOff == 0 || (cutOffPositions.Count > 0 && cutOff == cutOffPositions[cutOffPositions.Count - 1]))
{
cutOff = i + 1;
}
CutOffPositions.Add(cutOff);
// segmentLength = 1 + i - cutOff;
segmentLength = 0;
}
else
{
segmentLength += width;
}
}
}
internal static void InsertChar(char c, ref char deletedChar, TextSource ts)
{
var tb = ts.CurrentTB;
switch (c)
{
case '\n':
if (ts.Count == 0)
{
InsertLine(ts);
}
InsertLine(ts);
break;
case '\r': break;
case '\b': //backspace
if (tb.Selection.Start.iChar == 0 && tb.Selection.Start.iLine == 0)
{
return;
}
if (tb.Selection.Start.iChar == 0)
{
if (tb.lineInfos[tb.Selection.Start.iLine - 1].VisibleState != VisibleState.Visible)
{
tb.ExpandBlock(tb.Selection.Start.iLine - 1);
}
deletedChar = '\n';
MergeLines(tb.Selection.Start.iLine - 1, ts);
}
else
{
deletedChar = ts[tb.Selection.Start.iLine][tb.Selection.Start.iChar - 1].c;
ts[tb.Selection.Start.iLine].RemoveAt(tb.Selection.Start.iChar - 1);
tb.Selection.Start = new Place(tb.Selection.Start.iChar - 1, tb.Selection.Start.iLine);
}
break;
case '\t':
for (int i = 0; i < tb.TabLength; i++)
{
ts[tb.Selection.Start.iLine].Insert(tb.Selection.Start.iChar, new Char(' ', FastColoredTextBox.GetCharSize(tb.Font, ' ')));
}
tb.Selection.Start = new Place(tb.Selection.Start.iChar + tb.TabLength, tb.Selection.Start.iLine);
break;
default:
ts[tb.Selection.Start.iLine].Insert(tb.Selection.Start.iChar, new Char(c, FastColoredTextBox.GetCharSize(tb.Font, ' ')));
tb.Selection.Start = new Place(tb.Selection.Start.iChar + 1, tb.Selection.Start.iLine);
break;
}
}
