public override void Render(View view, int lineIndex)
{
var line = GetLine(view, lineIndex);
if (line == null)
return;
var foregroundColor = GetForegroundColor(view, lineIndex);
var backgroundColor = GetBackgroundColor(view, lineIndex);
RenderLine(view, lineIndex, line.Text, foregroundColor, backgroundColor);
}
private static ConsoleColor GetBackgroundColor(View view, int lineIndex)
{
var patchLine = GetLine(view, lineIndex);
if (patchLine == null)
return Console.BackgroundColor;
var kind = patchLine.Kind;
var isSelected = view.SelectedLine == lineIndex;
if (isSelected)
{
return kind.IsAdditionOrRemoval()
? ConsoleColor.Gray
: ConsoleColor.DarkGray;
}
return Console.BackgroundColor;
}
private static ConsoleColor GetForegroundColor(View view, int lineIndex)
{
var line = GetLine(view, lineIndex);
if (line == null)
return Console.ForegroundColor;
switch (line.Kind)
{
case PatchLineKind.Header:
return ConsoleColor.White;
case PatchLineKind.Hunk:
return ConsoleColor.DarkCyan;
case PatchLineKind.Context:
goto default;
case PatchLineKind.Addition:
return ConsoleColor.DarkGreen;
case PatchLineKind.Removal:
return ConsoleColor.DarkRed;
default:
return Console.ForegroundColor;
}
}
protected void RenderLine(View view, int lineIndex, string line, ConsoleColor foregroundColor, ConsoleColor backgroundColor)
{
var textStart = Math.Min(view.LeftChar, line.Length);
var textLength = Math.Max(Math.Min(view.Width, line.Length - view.LeftChar), 0);
var text = textLength < 0 ? string.Empty : line.ToVisual(view.VisibleWhitespace).Substring(textStart, textLength);
var oldForeground = Console.ForegroundColor;
var oldBackgorund = Console.BackgroundColor;
Console.ForegroundColor = foregroundColor;
Console.BackgroundColor = backgroundColor;
var visualLine = lineIndex - view.TopLine + view.Top;
Console.SetCursorPosition(view.Left, visualLine);
Console.Write(text);
var remaining = view.Width - textLength;
if (remaining > 0)
Console.Write(_blankRow, 0, remaining);
Console.ForegroundColor = oldForeground;
Console.BackgroundColor = oldBackgorund;
}
private void InitializeScreen()
{
var oldView = _view;
_header = new Label(0, 0, Console.WindowWidth);
_header.Foreground = ConsoleColor.Yellow;
_header.Background = ConsoleColor.DarkGray;
var renderer = new PatchDocumentLineRenderer();
_view = new View(renderer, 1, 0, Console.WindowHeight - 2, Console.WindowWidth);
_view.SelectedLineChanged += delegate { UpdateHeader(); };
_footer = new Label(Console.WindowHeight - 2, 0, Console.WindowWidth);
_footer.Foreground = ConsoleColor.Yellow;
_footer.Background = ConsoleColor.DarkGray;
UpdateRepository();
if (oldView != null)
{
_view.VisibleWhitespace = oldView.VisibleWhitespace;
_view.SelectedLine = oldView.SelectedLine;
_view.BringIntoView(_view.SelectedLine);
}
}
private static PatchLine GetLine(View view, int lineIndex)
{
var document = view.Document as PatchDocument;
return document?.Lines[lineIndex];
}
public abstract void Render(View view, int lineIndex);