public override void Execute(TextBoxControl editor)
{
int lineWidth = editor.GetLineWidth(editor.Caret.Position.Y);
if (lineWidth <= editor.CalColumnLocation(editor.Caret.Position.Y, editor.Caret.Position.X) && editor.Caret.Position.Y != editor.LineCount)
{
if (editor.HorizontalScroll.Value != 0 && editor.HorizontalScroll.Visible)
{
editor.HorizontalScroll.Value = 0;
}
if ((editor.Caret.Position.Y + 1) * editor.FontHeight > editor.DrawRectangle.Height && editor.VerticalScroll.Visible)
{
editor.VerticalScroll.Value = Math.Min(editor.VerticalScroll.Maximum, editor.VerticalScroll.Value + editor.FontHeight);
}
editor.PerformLayout();
editor.Caret.Position = new TextLocation(0, editor.Caret.Position.Y + 1);
editor.Caret.UpdateCaretPosition();
}
else
{
int location = editor.GetMovePositionByKey(false);
if (location > editor.DrawRectangle.Width && location > editor.HorizontalScroll.Value + editor.DrawRectangle.Width && editor.HorizontalScroll.Visible)
{
editor.HorizontalScroll.Value = Math.Min(editor.VerticalScroll.Maximum, editor.HorizontalScroll.Value + editor.DrawRectangle.Width);
}
editor.PerformLayout();
editor.Caret.Position = new TextLocation(editor.CalColumnNumber(editor.Caret.Position.Y, location), editor.Caret.Position.Y);
editor.Caret.UpdateCaretPosition();
}
}
public override void Execute(TextBoxControl editor)
{
if (editor.Caret.Position.X == 0)
{
if (editor.Caret.Position.Y > 1)
{
int lineWidth = editor.GetLineWidth(editor.Caret.Position.Y - 1);
if (lineWidth > editor.DrawRectangle.Width && editor.HorizontalScroll.Visible)
{
editor.HorizontalScroll.Value = Math.Min(editor.HorizontalScroll.Maximum, editor.HorizontalScroll.Value + lineWidth - editor.DrawRectangle.Width);
}
// 由于光标的起点为光标顶端点，在计算相对于垂直滚动条位置时需减2
if ((editor.Caret.Position.Y - 2) * editor.FontHeight < editor.VerticalScroll.Value && editor.VerticalScroll.Visible)
{
editor.VerticalScroll.Value = Math.Max(editor.VerticalScroll.Minimum, editor.VerticalScroll.Value - editor.FontHeight);
}
editor.PerformLayout();
editor.Caret.Position = new TextLocation(editor.CalColumnNumber(editor.Caret.Position.Y - 1, lineWidth), editor.Caret.Position.Y - 1);
editor.Caret.UpdateCaretPosition();
}
}
else
{
int location = editor.GetMovePositionByKey(true);
int hScroll2 = editor.HorizontalScroll.Value - editor.DrawRectangle.Width;
if (location < editor.HorizontalScroll.Value && editor.HorizontalScroll.Visible)
{
editor.HorizontalScroll.Value = Math.Max(editor.VerticalScroll.Minimum, hScroll2 > 0 ? hScroll2 : 0);
}
editor.PerformLayout();
editor.Caret.Position = new TextLocation(editor.CalColumnNumber(editor.Caret.Position.Y, location), editor.Caret.Position.Y);
editor.Caret.UpdateCaretPosition();
}
}
