protected virtual void parseString(string expression, Font font, Point offset, Color color,
IILTextRenderer renderer, ref Size size,
ref List <ILRenderQueueItem> queue)
{
int pos = 0;
string key, itemText;
RectangleF bmpSize = new RectangleF();
int curHeigth = 0, curWidth = 0;
Bitmap itemBMP = null;
int lineHeight = 0, lineWidth = 0;
Size itemSize = Size.Empty;
while (pos < expression.Length)
{
itemText = expression.Substring(pos++, 1);
key = ILHashCreator.Hash(font, itemText);
if (renderer.TryGetSize(key, ref itemSize))
{
queue.Add(new ILRenderQueueItem(key, offset, color));
if (itemSize.Height > lineHeight)
{
lineHeight = itemSize.Height;
}
lineWidth += (int)itemSize.Width;
}
else
{
lock (this) {
itemBMP = transformItem(itemText, font, out bmpSize);
renderer.Cache(key, itemBMP, bmpSize);
queue.Add(new ILRenderQueueItem(key, offset, color));
// update size
if (bmpSize.Height > lineHeight)
{
lineHeight = (int)bmpSize.Height;
}
lineWidth += (int)bmpSize.Width;
}
}
}
size.Width += ((curWidth > lineWidth)?curWidth:lineWidth);
size.Height = curHeigth + lineHeight;
}
protected override void parseString(string expression, Font font, Point offset, Color color,
IILTextRenderer renderer, ref Size size,
ref List <ILRenderQueueItem> queue)
{
int pos = 0;
string key, itemText;
RectangleF bmpSize = new RectangleF();
int curHeigth = 0, curWidth = 0;
Bitmap itemBMP = null;
int lineHeight = 0, lineWidth = 0;
Size itemSize = Size.Empty;
while (pos < expression.Length)
{
itemText = expression.Substring(pos++, 1);
#region special position control sequences
if (itemText == "\r")
{
queue.Add(new ILRenderQueueItem(itemText, 0, 0, color));
if (curWidth < lineWidth)
{
curWidth = lineWidth;
}
lineWidth = 0;
continue;
}
else if (itemText == "\n")
{
queue.Add(new ILRenderQueueItem(itemText, 0, 0, color));
curHeigth += lineHeight;
lineHeight = 0;
if (curWidth < lineWidth)
{
curWidth = lineWidth;
}
lineWidth = 0;
continue;
#endregion
}
else if (itemText == "\\")
{
#region font control
if (pos < expression.Length - 2)
{
#region test for font control sequences: \it,\bf,\rm
if (expression[pos] == 'i' && expression[pos + 1] == 't')
{
font = new Font(font, font.Style | FontStyle.Italic);
pos += 2; continue;
}
else if (expression[pos] == 'b' && expression[pos + 1] == 'f')
{
font = new Font(font, font.Style | FontStyle.Bold);
pos += 2; continue;
}
else if (expression[pos] == 'r' && expression[pos + 1] == 'm')
{
font = new Font(font, FontStyle.Regular);
pos += 2; continue;
}
#endregion
#region fontname,-size,-color
if (parseKeyword(expression, ref pos, Keywords.Reset))
{
color = Color.Empty;
font = m_normalFont;
offset = new Point(0, 0);
continue;
}
string parameter = "";
if (parseKeywordArgumented(expression, ref pos, Keywords.Fontname, ref parameter))
{
font = new Font(parameter, font.Size, font.Style, font.Unit);
continue;
}
if (parseKeywordArgumented(expression, ref pos, Keywords.Fontsize, ref parameter))
{
int newSize;
if (!int.TryParse(parameter, out newSize))
{
continue;
}
if (parameter.StartsWith("+") && newSize > 0)
{
newSize += (int)font.Size;
if (newSize > 40)
{
newSize = 40;
}
}
else if (parameter.StartsWith("-") && -newSize < font.Size)
{
newSize = (int)font.Size + newSize;
}
if (newSize > 0 && newSize < 40)
{
offset.Y += (int)Math.Round(font.Size - newSize);
font = new Font(font.Name, newSize, font.Style, font.Unit);
}
continue;
}
if (parseKeywordArgumented(expression, ref pos, Keywords.Color, ref parameter))
{
parseColor(parameter, ref color);
continue;
}
#endregion
}
#endregion
//if (pos < expression.Length - "size".Length)
#region handle predefined symbols
TextSymbols symbol = matchSymbol(expression, ref pos);
if (symbol != TextSymbols.nothing)
{
itemText = TranslateSymbol(symbol);
if (String.IsNullOrEmpty(itemText))
{
continue;
}
}
#endregion
#region lower- upper indices
}
else if (pos < expression.Length && itemText == "_")
{
int end;
if (pos < expression.Length - 1 && expression[pos] == '{')
{
pos++;
// find end brace & remove
end = expression.IndexOf('}', pos) - 1;
if (end > 0 && end < expression.Length)
{
parseString(
expression.Substring(pos, end - pos + 1),
new Font(font.Name, font.Size * 0.7f, font.Style, font.Unit),
new Point(offset.X, offset.Y + (int)(0.3f * font.Height)),
color, renderer, ref size, ref queue);
pos = end + 2;
continue;
}
}
// cache next char only
parseString(
expression.Substring(pos++, 1),
new Font(font.Name, font.Size * 0.7f, font.Style, font.Unit),
new Point(offset.X, offset.Y + (int)(0.3f * font.Height)),
color, renderer, ref size, ref queue);
continue;
}
else if (pos < expression.Length && itemText == "^")
{
int end;
//offset.Y += 0.8f * font.Height;
if (pos < expression.Length - 1 && expression[pos] == '{')
{
pos++;
// find end brace & remove
end = expression.IndexOf('}', pos) - 1;
if (end > 0 && end < expression.Length)
{
parseString(
expression.Substring(pos, end - pos + 1),
new Font(font.Name, font.Size * 0.7f, font.Style, font.Unit),
new Point(offset.X, offset.Y - (int)(0.2f * font.Height)),
color, renderer, ref size, ref queue);
pos = end + 2;
continue;
}
}
// cache next char only
parseString(
expression.Substring(pos++, 1),
new Font(font.Name, font.Size * 0.7f, font.Style, font.Unit),
new Point(offset.X, offset.Y - (int)(0.2f * font.Height))
, color, renderer, ref size, ref queue);
continue;
#endregion
}
key = ILHashCreator.Hash(font, itemText);
if (renderer.TryGetSize(key, ref itemSize))
{
queue.Add(new ILRenderQueueItem(key, offset, color));
if (itemSize.Height > lineHeight)
{
lineHeight = itemSize.Height;
}
lineWidth += (int)itemSize.Width;
}
else
{
lock (this) {
itemBMP = transformItem(itemText, font, out bmpSize);
renderer.Cache(key, itemBMP, bmpSize);
queue.Add(new ILRenderQueueItem(key, offset, color));
// update size
if (bmpSize.Height > lineHeight)
{
lineHeight = (int)bmpSize.Height;
}
lineWidth += (int)bmpSize.Width;
}
}
}
size.Width += ((curWidth > lineWidth)?curWidth:lineWidth);
size.Height = curHeigth + lineHeight;
}