private void DeleteSelection(CharacterView view)
{
var selectionOperations = Selections.OrderByDescending(x => x.LineIndex).ToList();
foreach (var selectionOperation in selectionOperations)
{
switch (selectionOperation.SelectionType)
{
case SelectionType.NotSelected:
continue;
case SelectionType.FullRow:
_rows.RemoveAt(selectionOperation.LineIndex);
continue;
case SelectionType.Range:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (_rows.Count < 1)
{
_rows.Add("");
}
while (CursorY >= _rows.Count)
{
CursorY--;
}
Selections.ClearSelection();
view.EnsurePositionIsVisible(Cursor);
}
public bool KeyPress(char c, CharacterArea area, CharacterView view)
{
switch ((int)c)
{
case 8:
area.TypeBackspace(view);
return(true);
case 9:
break;
case 10:
return(false);
case 13:
area.TypeEnter(view);
return(true);
case 27:
area.Selections.Clear();
return(false);
}
if (!area.TypeCharacter(c, view, false))
{
return(false);
}
area.MoveLeft(view, false);
return(true);
}
public void MoveToHome(CharacterView view)
{
if (CurrentRowLength == 0)
{
CursorX = 0;
JumpInHorizontalView(view);
return;
}
var indentDepth = GetIndentDepth(CursorY);
if (CursorX > indentDepth)
{
CursorX = indentDepth;
JumpInHorizontalView(view);
return;
}
if (CursorX == indentDepth)
{
CursorX = 0;
JumpInHorizontalView(view);
return;
}
CursorX = CursorX == 0 ? indentDepth : 0;
JumpInHorizontalView(view);
}
public void Indent(CharacterArea area, CharacterView view)
{
for (var t = 0; t < 3; t++)
{
area.TypeCharacter(' ', view, true);
area.MoveLeft(view, t == 2);
}
}
public void TypeBackspace(CharacterView view)
{
var len = CurrentRowLength;
var viewOffsetX = 0;
var viewOffsetY = 0;
if (CursorX == 0 && CursorY > 0)
{
var prevRowLength = _rows[CursorY - 1].Length;
_rows[CursorY - 1] += _rows[CursorY];
_rows.RemoveAt(CursorY);
CursorX = prevRowLength;
CursorY--;
if (CursorY > 0)
{
viewOffsetY--;
}
}
else if (CursorX > 0 && CursorX > len)
{
MoveLeft(view, false);
if (CursorX > 0)
{
viewOffsetX--;
}
}
else if (CursorX == 1)
{
_rows[CursorY] = _rows[CursorY].Substring(1);
CursorX = 0;
}
else if (len > 0 && CursorX == len)
{
_rows[CursorY] = _rows[CursorY].Substring(0, len - 1);
CursorX--;
viewOffsetX--;
}
else if (CursorX > 0)
{
var left = _rows[CursorY].Substring(0, CursorX - 1);
var right = _rows[CursorY].Substring(CursorX);
_rows[CursorY] = left + right;
CursorX--;
viewOffsetX--;
}
if (_options.ScrollAhead)
{
view.EnsurePositionIsVisible(CursorX + viewOffsetX, CursorY + viewOffsetY);
}
else
{
view.EnsurePositionIsVisible(Cursor);
}
}
private void AutoIndent(CharacterView view, int y)
{
if (y <= 0)
{
return;
}
for (var i = 0; i < GetIndentDepth(y - 1); i++)
{
TypeCharacter(' ', view, y, true);
MoveLeft(view, true);
}
JumpInHorizontalView(view);
}
public void TypeEnter(CharacterView view)
{
if (CursorX == 0)
{
_rows.Insert(CursorY, "");
MoveDown(view, false);
JumpInHorizontalView(view);
if (_options.AutoIndent)
{
AutoIndent(view);
}
return;
}
if (CursorX == CurrentRowLength)
{
if (CursorY >= _rows.Count - 1)
{
_rows.Add("");
}
else
{
_rows.Insert(CursorY + 1, "");
}
if (_options.AutoIndent)
{
AutoIndent(view, CursorY + 1);
}
MoveDown(view, true);
MoveLeft(view, false);
return;
}
var leftPart = _rows[CursorY].Substring(0, CursorX);
var rightPart = _rows[CursorY].Substring(CursorX);
_rows[CursorY] = leftPart;
if (CursorY >= _rows.Count - 1)
{
_rows.Add(rightPart);
}
else
{
_rows.Insert(CursorY + 1, rightPart);
}
MoveDown(view, true);
MoveToHome(view);
if (_options.AutoIndent)
{
AutoIndent(view);
}
}
public void MoveUp(CharacterView view)
{
if (CursorY > 0)
{
CursorY--;
}
if (CursorY < view.OffsetY)
{
view.OffsetY--;
}
while (CursorX > CurrentRowLength)
{
MoveLeft(view, false);
}
}
public void PageUp(CharacterView view)
{
if (CursorY <= 0)
{
return;
}
view.OffsetY -= CharacterView.ZoomLevels.GetCurrentZoom().Rows;
if (view.OffsetY < 0)
{
view.OffsetY = 0;
}
CursorY -= CharacterView.ZoomLevels.GetCurrentZoom().Rows;
if (CursorY < 0)
{
CursorY = 0;
}
}
public void TypeDelete(CharacterView view)
{
if (HasSelection())
{
DeleteSelection(view);
return;
}
var len = CurrentRowLength;
if (len == 0 && CursorX == 0)
{
_rows.RemoveAt(CursorY);
if (_rows.Count <= 0)
{
_rows.Add("");
}
if (CursorY >= _rows.Count)
{
CursorY = _rows.Count - 1;
}
}
else if (len > 0 && CursorX == 0)
{
_rows[CursorY] = _rows[CursorY].Substring(1);
}
else if (len > 0 && CursorX >= len)
{
if (CursorY < _rows.Count - 1)
{
_rows[CursorY] += _rows[CursorY + 1];
_rows.RemoveAt(CursorY + 1);
}
CursorX = len;
}
else if (len > 0 && CursorX == len - 1)
{
_rows[CursorY] = _rows[CursorY].Substring(0, len - 1);
}
else if (len > 0 && CursorX < len - 1)
{
var left = _rows[CursorY].Substring(0, CursorX);
var right = _rows[CursorY].Substring(CursorX + 1);
_rows[CursorY] = left + right;
}
}
public void MoveDown(CharacterView view, bool batch)
{
if (CursorY < _rows.Count - 1)
{
CursorY++;
}
if (!batch)
{
if (CursorY > view.OffsetY + CharacterView.ZoomLevels.GetCurrentZoom().Rows - 1)
{
view.OffsetY++;
}
}
while (CursorX > CurrentRowLength)
{
CursorX--;
}
}
public void KeyDown(Keys keyCode, CharacterArea area, CharacterView view)
{
switch (keyCode)
{
case Keys.Delete:
area.TypeDelete(view);
break;
case Keys.Down:
area.MoveDown(view, false);
break;
case Keys.Up:
area.MoveUp(view);
break;
case Keys.Left:
area.MoveRight(view, false);
break;
case Keys.Right:
area.MoveLeft(view, false);
break;
case Keys.Home:
area.MoveToHome(view);
break;
case Keys.End:
area.MoveToEnd(view);
break;
case Keys.PageUp:
area.PageUp(view);
break;
case Keys.PageDown:
area.PageDown(view);
break;
}
}
public void PageDown(CharacterView view)
{
if (CursorY >= _rows.Count - 1)
{
return;
}
view.OffsetY += CharacterView.ZoomLevels.GetCurrentZoom().Rows;
if (view.OffsetY > _rows.Count - CharacterView.ZoomLevels.GetCurrentZoom().Rows)
{
view.OffsetY = _rows.Count - CharacterView.ZoomLevels.GetCurrentZoom().Rows;
}
if (_rows.Count <= CharacterView.ZoomLevels.GetCurrentZoom().Rows)
{
view.OffsetY = 0;
}
CursorY += CharacterView.ZoomLevels.GetCurrentZoom().Rows;
if (CursorY >= _rows.Count)
{
CursorY = _rows.Count - 1;
}
}
private void JumpInHorizontalView(CharacterView view)
{
var targetX = CursorX;
if (CursorX > 0 && _options.ScrollAhead)
{
targetX--;
}
while (targetX < view.OffsetX)
{
view.OffsetX--;
}
targetX = CursorX;
if (_options.ScrollAhead)
{
targetX++;
}
while (targetX > view.OffsetX + CharacterView.ZoomLevels.GetCurrentZoom().Columns - 1)
{
view.OffsetX++;
}
}
public void Outdent(CharacterArea area, CharacterView view)
{
if (area.CurrentRowLength <= 0)
{
return;
}
for (var t = 0; t < 3; t++)
{
if (area.CurrentRow[0] != ' ')
{
continue;
}
area.DeleteAt(0, area.CursorY);
if (area.CursorX > 0)
{
area.CursorX--;
}
}
var offsetX = _options.ScrollAhead && area.CursorX > 0 ? -1 : 0;
view.EnsurePositionIsVisible(area.CursorX + offsetX, area.CursorY);
}
public void MoveLeft(CharacterView view, bool batch)
{
if (CursorX < CurrentRowLength)
{
CursorX++;
if (CursorX > view.OffsetX + CharacterView.ZoomLevels.GetCurrentZoom().Columns - 1)
{
view.OffsetX++;
}
return;
}
if (CursorY >= _rows.Count - 1)
{
return;
}
MoveDown(view, batch);
CursorX = 0;
if (!batch)
{
JumpInHorizontalView(view);
}
}
public void MoveRight(CharacterView view, bool batch)
{
if (CursorX > 0)
{
CursorX--;
if (CursorX < view.OffsetX)
{
view.OffsetX--;
}
return;
}
if (CursorY <= 0)
{
return;
}
MoveUp(view);
CursorX = CurrentRowLength;
if (!batch)
{
JumpInHorizontalView(view);
}
}
public bool TypeCharacter(char c, CharacterView view, int y, bool batch)
{
var r = _rows[y];
if (string.IsNullOrEmpty(r))
{
_rows[y] = new string(c, 1);
if (!batch)
{
JumpInHorizontalView(view);
}
return(true);
}
if (CursorX < r.Length)
{
_rows[y] = r.Insert(CursorX, new string(c, 1));
return(true);
}
if (CursorX > r.Length)
{
CursorX = r.Length;
if (!batch)
{
JumpInHorizontalView(view);
}
}
try
{
_rows[y] = r.Insert(CursorX, new string(c, 1));
return(true);
}
catch
{
return(false);
}
}
public void SelectionEnd(CharacterView view)
{
}
public void SelectionHome(CharacterView view)
{
}
public void SelectionPageDown(CharacterView view)
{
}
public void SelectionPageUp(CharacterView view)
{
}
public void SelectionRight(CharacterView view)
{
}
public void SelectionLeft(CharacterView view)
{
}
private void AutoIndent(CharacterView view) => AutoIndent(view, CursorY);
public bool TypeCharacter(char c, CharacterView view, bool batch) => TypeCharacter(c, view, CursorY, batch);
public void MoveToEnd(CharacterView view)
{
CursorX = CurrentRowLength;
JumpInHorizontalView(view);
}