/// <summary>
/// 处理控制键按下的事件，包括功能键、删除键、编辑键的功能实现
/// </summary>
/// <param name="sender">事件触发者</param>
/// <param name="e">事件参数</param>
private void TextCtrl_KeyDown(object sender, KeyEventArgs e)
{
lastKeyHandled = true;
if (e.KeyCode == Keys.Up)
{
cursorRelativePos.y--;
if (!ValidateCaretPos())
{
SystemSounds.Beep.Play();
}
UpdateCaretPos();
ArrowKeyEndProc();
}
else if (e.KeyCode == Keys.Down)
{
cursorRelativePos.y++;
if (!ValidateCaretPos())
{
SystemSounds.Beep.Play();
}
UpdateCaretPos();
ArrowKeyEndProc();
}
else if (e.KeyCode == Keys.Left)
{
CaretStep(false);
}
else if (e.KeyCode == Keys.Right)
{
CaretStep(true);
}
else if (e.KeyCode == Keys.Home)
{
cursorRelativePos.x = viewAbsolutePos.x = 0;
ValidateCaretPos();
UpdateCaretPos();
Invalidate();
}
else if (e.KeyCode == Keys.End)
{
viewAbsolutePos.x = 0;
cursorRelativePos.x = lineMaxLen;
ValidateCaretPos();
UpdateCaretPos();
Invalidate();
}
else if (e.KeyCode == Keys.PageUp)
{
cursorRelativePos.y -= txtFieldSize.Height;
ValidateCaretPos();
UpdateCaretPos();
Invalidate();
}
else if (e.KeyCode == Keys.PageDown)
{
cursorRelativePos.y += txtFieldSize.Height;
ValidateCaretPos();
UpdateCaretPos();
Invalidate();
}
else if (e.KeyCode == Keys.C && e.Control)
{
CopySelection();
}
else if (e.KeyCode == Keys.V && e.Control)
{
Paste();
}
else if (e.KeyCode == Keys.F && e.Control)
{
RequestFind(this);
}
else if (e.KeyCode == Keys.S && e.Control)
{
SaveFile();
}
else if (e.KeyCode == Keys.A && e.Control)
{
selectionStartPos.x = selectionStartPos.y = 0;
selectionEndPos.y = texts.Length - 1;
selectionEndPos.x = sizes[texts.Length - 1];
isSelecting = true;
UpdateSelection();
}
else if (e.KeyCode == Keys.D && e.Control)
{
CoreMethods.RemoveLine(cursorRelativePos.y + viewAbsolutePos.y);
UpdateText();
ValidateCaretPos();
UpdateCaretPos();
}
else if (e.KeyCode == Keys.Back || e.KeyCode == Keys.Delete)
{
if (isSelecting)
{
if (!CoreMethods.Remove(ref selectionStartPos, ref selectionEndPos))
{
if (DebugMsgSend != null)
{
DebugMsgSend("::Remove failed!");
}
}
ScrollTo(selectionStartPos);
ClearSelection();
UpdateText();
}
else
{
if (e.KeyCode == Keys.Delete && !CaretStep(true, true))
{
return;
}
CPosition tmp = cursorRelativePos + viewAbsolutePos;
if (!CoreMethods.Backspace(ref tmp))
{
if (DebugMsgSend != null)
{
DebugMsgSend("::Backspace failed!");
}
}
CaretStep(false, true);
tmp = cursorRelativePos + viewAbsolutePos;
UpdateText();
UpdateScrollBars();
cursorRelativePos = tmp - viewAbsolutePos;
ValidateCaretPos();
UpdateCaretPos();
}
}
else
{
lastKeyHandled = false;
}
ctrlState = e.Control;
}
/// <summary>
/// 保存文件
/// </summary>
/// <param name="path">文件路径，为空则为默认路径</param>
/// <returns>保存是否成功</returns>
public bool SaveFile(string path = "")
{
return(CoreMethods.Save(path));
}