//=========================================================================================
internal string GetText(TextPoint start, TextPoint end)
{
if (start > end)
{
TextPoint temp = start;
start = end;
end = temp;
}
if (start.Line == end.Line)
return this.Lines[start.Line].Text.Substring(start.Char, end.Char - start.Char);
else
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
string sLine = this.Lines[start.Line].Text;
sb.AppendLine(sLine.Substring(start.Char, sLine.Length - start.Char));
for (int i = start.Line + 1; i < end.Line; i++)
sb.AppendLine(this.Lines[i].Text);
sb.AppendLine(this.Lines[end.Line].Text.Substring(0, end.Char));
return sb.ToString();
}
}
//=========================================================================================
private void DrawSpanBackground(Graphics g, TextPoint start, TextPoint end, Brush brush, Pen pen)
{
if (start.Line != end.Line)
{
//first selected line
int iLastCol = TextCaret.GetLastCol(this.Viewer.Document[start.Line].Text, this.Viewer._TabSize);
this.DrawLineSpanBackground(g, start.Line, start.Col, iLastCol - start.Col, brush, null);
//intermediate selected lines
for (int i = start.Line + 1; i < end.Line; i++)
{
iLastCol = TextCaret.GetLastCol(this.Viewer.Document[i].Text, this.Viewer._TabSize);
this.DrawLineSpanBackground(g, i, 0, iLastCol + 1, brush, null);
}
//last selected line
this.DrawLineSpanBackground(g, end.Line, 0, end.Col, brush, null);
}
//if there some selected symbols
else if (start.Col != end.Col)
this.DrawLineSpanBackground(g, start.Line, start.Col, end.Col - start.Col, brush, pen);
}
//=========================================================================================
/// <summary>Compare specified position with some expected.</summary>
private void AssertPoint(TextPoint point, int line, int chr, int col)
{
Assert.AreEqual(point.ToString(), string.Format("Ln:{0}, col:{1}, ch:{2}", line, col, chr));
}
//=========================================================================================
/// <summary>Compare specified position with some expected.</summary>
private void AssertPoint(TextPoint point, int line, int chr)
{
Assert.AreEqual(point.Line, line);
Assert.AreEqual(point.Char, chr);
}
//=========================================================================================
protected override void OnMouseDown(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
var oSelectionPos = this.SelectionStart;
TextPoint pos = this.GetTextPointByXY(e.Location);
this.Caret.MoveToPos(pos.Line, pos.Col, true);
if ((Control.ModifierKeys & Keys.Shift) == 0)
this.SelectionStart = this.Caret.Point;
else
this.SelectionStart = oSelectionPos;
this.Caret.Blink = true;
this.Invalidate(false);
this.Capture = true;
}
else if (e.Button == MouseButtons.Right && !this.Viewer.SelectionExists)
{
TextPoint pos = this.GetTextPointByXY(e.Location);
this.Caret.MoveToPos(pos.Line, pos.Col, true);
this.SelectionStart = this.Caret.Point;
this.Caret.Blink = true;
this.Invalidate(false);
}
base.OnMouseDown(e);
}
//=========================================================================================
public Point GetXYByTextPoint(TextPoint pos)
{
int x = (pos.Col - this.FirstVisibleCol) * this.Viewer.CharWidth + this.Viewer.MarginWidth;
int y = (pos.Line - this.FirstVisibleRow) * this.Viewer.CharHeight;
return new Point(x, y);
}
//=========================================================================================
#region Служебный код
//=========================================================================================
/// <summary>Move caret to the specified position and generate event if it's need</summary>
void SetCaretPos(int line, int chr, int col, bool changeWantedCol, bool clearSelection)
{
bool bPosChanged = this._Point.Line != line || this._Point.Char != chr;
if (bPosChanged)
this._Point = new TextPoint(line, col, chr);
if (clearSelection)
this.Parent.SelectionStart = this._Point;
if (bPosChanged)
{
this._CurrentToken_Is_Valid = false;
//Generate OnChangeSelection event
this.Parent.Viewer.OnChangeSelection();
}
if (changeWantedCol)
this._WantedCol = col;
}
//=========================================================================================
public static TextPoint Max(TextPoint first, TextPoint second)
{
return first.CompareTo(second) >= 0 ? first : second;
}
//=========================================================================================
internal int GetTextIndexByTextPoint(TextPoint textPoint)
{
int iTextIndex = textPoint.Char;
for (int i = 0; i < textPoint.Line; i++)
iTextIndex += this.Document[i].Text.Length + "\r\n".Length;
return iTextIndex;
}
