public void EnsurePositionIsVisible(int x, int y)
{
while (x < OffsetX)
{
OffsetX--;
}
while (x > OffsetX + ZoomLevels.GetCurrentZoom().Columns - 1)
{
OffsetX++;
}
while (y < OffsetY)
{
OffsetY--;
}
while (y > OffsetY + ZoomLevels.GetCurrentZoom().Rows - 1)
{
OffsetY++;
}
}
public void Draw(CharacterArea area, Graphics g, Font secondaryFont, int viewportX, int viewportY, int viewportWidth, int viewportHeight)
{
var xpos = (double)viewportX;
var ypos = (double)viewportY;
var charWidth = viewportWidth / (double)ZoomLevels.GetCurrentZoom().Columns;
var charHeight = viewportHeight / (double)ZoomLevels.GetCurrentZoom().Rows;
var physicalWidth = (float)charWidth;
var physicalHeight = (float)charHeight;
using (var background = new SolidBrush(_options.BackgroundColor))
{
using (var foreground = new SolidBrush(_options.CursorColor))
{
using (var selection = new SolidBrush(_options.SelectionColor))
{
g.Clear(Color.Black);
var z = g.MeasureString("l", Font);
var charOffsetX = (float)(charWidth / 2 - z.Width / 2);
var charOffsetY = (float)(charHeight / 2 - z.Height / 2);
for (var y = 0; y < ZoomLevels.GetCurrentZoom().Rows; y++)
{
var rowSelection = area.GetRowSelection(y + OffsetY);
var physicalY = (float)ypos;
for (var x = 0; x < ZoomLevels.GetCurrentZoom().Columns; x++)
{
var physicalX = (float)xpos;
var s = area.GetCharacterAt(x + OffsetX, y + OffsetY);
if (rowSelection.CharacterIsSelected(x + OffsetX))
{
g.FillRectangle(selection, physicalX, physicalY, physicalWidth, physicalHeight);
}
var charX = physicalX + charOffsetX;
var charY = physicalY + charOffsetY;
if (x + OffsetX == area.CursorX && y + OffsetY == area.CursorY)
{
g.FillRectangle(foreground, physicalX, physicalY, physicalWidth, physicalHeight);
if (!string.IsNullOrWhiteSpace(s))
{
g.DrawString(s, Font, background, charX, charY);
}
}
else
{
g.DrawString(s, Font, foreground, charX, charY);
}
#if DEBUG
var whitespace = area.GetCharacterOrWhitespaceAt(x + OffsetX, y + OffsetY);
if (whitespace != null)
{
if (whitespace == " ")
{
g.FillRectangle(Brushes.Yellow, (physicalX + (int)(charWidth / 2)) - 1,
(physicalY + (int)(charHeight / 2)) - 1, 2, 2);
}
else if (whitespace[0] == 9)
{
g.FillRectangle(Brushes.Pink, (physicalX + (int)(charWidth / 2)) - 1,
(physicalY + (int)(charHeight / 2)) - 1, 2, 2);
}
}
#endif
xpos += charWidth;
}
xpos = viewportX;
ypos += charHeight;
}
}
}
}
if (!_options.ShowCurrentLineNumber && !_options.ShowTotalLines && !_options.ShowColumnNumber)
{
return;
}
string row;
if (_options.ShowColumnNumber && (_options.ShowCurrentLineNumber || _options.ShowTotalLines))
{
row = $"{area.CursorX + 1}, ";
}
else if (_options.ShowColumnNumber)
{
row = $"{area.CursorX + 1}";
}
else
{
row = "";
}
row += _options.ShowCurrentLineNumber && _options.ShowTotalLines ? $"{area.CursorY + 1}/{area.RowCount}"
: _options.ShowCurrentLineNumber
? $"{area.CursorY + 1}" : $"{area.RowCount}";
var m = g.MeasureString(row, secondaryFont);
const int margin = 3;
using (var b = new SolidBrush(Color.FromArgb(50, 255, 255, 255)))
g.DrawString(row, secondaryFont, b, viewportX + viewportWidth - m.Width - margin, viewportY + margin);
}
public bool IsInView(int x, int y) => x >= OffsetX && x < OffsetX + ZoomLevels.GetCurrentZoom().Columns && y >= OffsetY && y < OffsetY + ZoomLevels.GetCurrentZoom().Rows;