internal int Index; //stores at 1 the first entry, that is biff8 entry 8.
internal bool ColorIsValid(TExcelColor aColor, IFlexCelPalette xls)
{
int RealIndex = Index < 1 ? Index + 8 : Index;
if (RealIndex <= 0 || RealIndex > 56)
{
return(false);
}
if (LastColorStored != aColor)
{
return(false);
}
Color c = xls.GetColorPalette(RealIndex);
//If the color is Theme, it could have changed if the theme palette changed.
if (aColor.ColorType == TColorType.Theme)
{
if (xls.GetColorTheme(aColor.Theme) != LastColorInTheme)
{
return(false);
}
}
return(c.ToArgb() == LastColorInPalette);
}
internal int GetBiff8ColorIndex(IFlexCelPalette xls, TAutomaticColor autoType)
{
if (xls == null)
{
xls = TDummyFlexCelPalette.Instance;
}
switch (ColorType)
{
case TColorType.RGB:
unchecked
{
Color cRGB = ColorUtil.FromArgb((int)((uint)(0xFF000000 | FRGB)));
return(xls.NearestColorIndex(ApplyTint(cRGB)) - 1 + 8); // nearestcolorindex returns 1-based
}
case TColorType.Automatic:
return(GetAutomaticColorIndex(autoType));
case TColorType.Theme:
return(xls.NearestColorIndex(ApplyTint(xls.GetColorTheme(FTheme).ToColor(xls))) - 1 + 8);
case TColorType.Indexed:
return(FIndex - 1 + 8); //findex is 1-based too.
}
return(1);
}
internal int GetBiff8ColorIndex(IFlexCelPalette xls, TAutomaticColor autoType, ref TColorIndexCache IndexCache)
{
if (xls == null)
{
xls = TDummyFlexCelPalette.Instance;
}
if (IndexCache.ColorIsValid(this, xls))
{
return(IndexCache.Index - 1 + 8);
}
int ColorIndex = GetBiff8ColorIndex(xls, autoType);
IndexCache.LastColorStored = this;
IndexCache.LastColorInPalette = ToColor(xls).ToArgb();
IndexCache.Index = ColorIndex + 1 - 8; //IndexCache is the same base as index.
if (ColorType == TColorType.Theme)
{
IndexCache.LastColorInTheme = xls.GetColorTheme(Theme);
}
return(ColorIndex);
}
/// <summary>
/// Returns the value of this class as a system color.
/// </summary>
/// <param name="xls">Excel file containing the themes and palettes for the color indexes.</param>
/// <param name="automaticColor">Color to be returned if this structure has an automatic color.</param>
/// <returns></returns>
public Color ToColor(IFlexCelPalette xls, Color automaticColor)
{
if (automaticColor != ColorUtil.Empty && IsAutomatic)
{
return(ApplyTint(automaticColor));
}
if (xls == null)
{
xls = TDummyFlexCelPalette.Instance;
}
Color Result = automaticColor;
switch (ColorType)
{
case TColorType.RGB:
unchecked
{
Result = ColorUtil.FromArgb((int)((uint)(0xFF000000 | FRGB)));
}
break;
case TColorType.Automatic:
Result = GetAutomaticRGB();
break;
case TColorType.Theme:
Result = xls.GetColorTheme(FTheme).ToColor(xls);
break;
case TColorType.Indexed:
Result = xls.GetColorPalette(Index);
break;
}
return(ApplyTint(Result));
}