protected override bool OnKeyDown(InputState state, KeyDownEventArgs args)
{
if (!HasFocus)
{
return(false);
}
if (textInput?.ImeActive == true)
{
return(true);
}
switch (args.Key)
{
case Key.Tab:
return(false);
case Key.End:
moveSelection(InternalText.Length, state.Keyboard.ShiftPressed);
return(true);
case Key.Home:
moveSelection(-InternalText.Length, state.Keyboard.ShiftPressed);
return(true);
case Key.Left:
{
if (!HandleLeftRightArrows)
{
return(false);
}
if (selectionEnd == 0)
{
//we only clear if you aren't holding shift
if (!state.Keyboard.ShiftPressed)
{
resetSelection();
}
return(true);
}
int amount = 1;
if (state.Keyboard.ControlPressed)
{
int lastSpace = InternalText.LastIndexOf(' ', Math.Max(0, selectionEnd - 2));
if (lastSpace >= 0)
{
//if you have something selected and shift is not held down
//A selection reset is required to select a word inside the current selection
if (!state.Keyboard.ShiftPressed)
{
resetSelection();
}
amount = selectionEnd - lastSpace - 1;
}
else
{
amount = selectionEnd;
}
}
moveSelection(-amount, state.Keyboard.ShiftPressed);
return(true);
}
case Key.Right:
{
if (!HandleLeftRightArrows)
{
return(false);
}
if (selectionEnd == InternalText.Length)
{
if (!state.Keyboard.ShiftPressed)
{
resetSelection();
}
return(true);
}
int amount = 1;
if (state.Keyboard.ControlPressed)
{
int nextSpace = InternalText.IndexOf(' ', selectionEnd + 1);
if (nextSpace >= 0)
{
if (!state.Keyboard.ShiftPressed)
{
resetSelection();
}
amount = nextSpace - selectionEnd;
}
else
{
amount = InternalText.Length - selectionEnd;
}
}
moveSelection(amount, state.Keyboard.ShiftPressed);
return(true);
}
case Key.Enter:
selectionStart = selectionEnd = 0;
TriggerFocusLost(state);
return(true);
case Key.Delete:
if (selectionLength == 0)
{
if (InternalText.Length == selectionStart)
{
return(true);
}
if (state.Keyboard.ControlPressed)
{
int spacePos = selectionStart;
while (InternalText[spacePos] == ' ' && spacePos < InternalText.Length)
{
spacePos++;
}
spacePos = MathHelper.Clamp(InternalText.IndexOf(' ', spacePos), 0, InternalText.Length);
selectionEnd = spacePos;
if (selectionStart == 0 && spacePos == 0)
{
selectionEnd = InternalText.Length;
}
if (selectionLength == 0)
{
return(true);
}
}
else
{
//we're deleting in front of the cursor, so move the cursor forward once first
selectionStart = selectionEnd = selectionStart + 1;
}
}
removeCharacterOrSelection();
return(true);
case Key.Back:
if (selectionLength == 0 && state.Keyboard.ControlPressed)
{
int spacePos = selectionLeft >= 2 ? Math.Max(0, InternalText.LastIndexOf(' ', selectionLeft - 2) + 1) : 0;
selectionStart = spacePos;
}
removeCharacterOrSelection();
return(true);
}
if (state.Keyboard.ControlPressed)
{
//handling of function keys
switch (args.Key)
{
case Key.A:
selectionStart = 0;
selectionEnd = InternalText.Length;
cursorAndLayout.Invalidate();
return(true);
case Key.C:
if (string.IsNullOrEmpty(SelectedText) || !AllowClipboardExport)
{
return(true);
}
//System.Windows.Forms.Clipboard.SetText(SelectedText);
return(true);
case Key.X:
if (string.IsNullOrEmpty(SelectedText))
{
return(true);
}
//if (AllowClipboardExport)
// System.Windows.Forms.Clipboard.SetText(SelectedText);
removeCharacterOrSelection();
return(true);
case Key.V:
//the text is pasted into the hidden textbox, so we don't need any direct clipboard interaction here.
insertString(textInput?.GetPendingText());
return(true);
}
return(false);
}
string str = textInput?.GetPendingText();
if (!string.IsNullOrEmpty(str))
{
if (state.Keyboard.ShiftPressed)
{
audio.Sample.Get(@"Keyboard/key-caps")?.Play();
}
else
{
audio.Sample.Get($@"Keyboard/key-press-{RNG.Next(1, 5)}")?.Play();
}
insertString(str);
}
return(true);
}
