public void Draw(
DrawingHandleScreen handle,
SpriteFont font,
UIBox2 drawBox,
float verticalOffset,
// A stack for format tags.
// This stack contains the format tag to RETURN TO when popped off.
// So when a new color tag gets hit this stack gets the previous color pushed on.
Stack <FormattedMessage.Tag> formatStack, float uiScale)
{
// The tag currently doing color.
var currentColorTag = TagBaseColor;
var globalBreakCounter = 0;
var lineBreakIndex = 0;
var baseLine = drawBox.TopLeft + new Vector2(0, font.GetAscent(uiScale) + verticalOffset);
formatStack.Clear();
foreach (var tag in Message.Tags)
{
switch (tag)
{
case FormattedMessage.TagColor tagColor:
formatStack.Push(currentColorTag);
currentColorTag = tagColor;
break;
case FormattedMessage.TagPop _:
var popped = formatStack.Pop();
switch (popped)
{
case FormattedMessage.TagColor tagColor:
currentColorTag = tagColor;
break;
default:
throw new InvalidOperationException();
}
break;
case FormattedMessage.TagText tagText:
{
var text = tagText.Text;
for (var i = 0; i < text.Length; i++, globalBreakCounter++)
{
var chr = text[i];
if (lineBreakIndex < LineBreaks.Count &&
LineBreaks[lineBreakIndex] == globalBreakCounter)
{
baseLine = new Vector2(drawBox.Left, baseLine.Y + font.GetLineHeight(uiScale));
lineBreakIndex += 1;
}
var advance = font.DrawChar(handle, chr, baseLine, uiScale, currentColorTag.Color);
baseLine += new Vector2(advance, 0);
}
break;
}
}
}
}
protected override void DoDraw(DrawingHandleScreen handle, UIBox2 box)
{
handle.DrawRect(box, BackgroundColor);
}
internal static float DrawChar(this SpriteFont font, DrawingHandleScreen handle, char character, Vector2 baseLine, float uiScale, Color color)
{
return(0f);
}