public static CssLength AsLength(this WebDom.CssCodeValueExpression value)
{
if (value.EvaluatedAs != WebDom.CssValueEvaluatedAs.Length)
{
//length from number
switch (value.Hint)
{
case WebDom.CssValueHint.Number:
{
if (value is WebDom.CssCodePrimitiveExpression)
{
WebDom.CssCodePrimitiveExpression prim = (WebDom.CssCodePrimitiveExpression)value;
CssLength len = new CssLength(value.AsNumber(), GetCssUnit(prim.Unit));
value.SetCssLength(len, WebDom.CssValueEvaluatedAs.Length);
return(len);
}
else
{
CssLength len = CssLength.MakePixelLength(value.AsNumber());
value.SetCssLength(len, WebDom.CssValueEvaluatedAs.Length);
return(len);
}
}
default:
{
CssLength len = TranslateLength(value.ToString());
value.SetCssLength(len, WebDom.CssValueEvaluatedAs.Length);
return(len);
}
}
}
return(value.GetCacheCssLength());
}
private static CssLength TranslateLength(CssLength len)
{
if (len.HasError)
{
//if unknown unit number
return(CssLength.MakePixelLength(len.Number));
}
return(len);
}
/// <summary>
/// Converts an HTML length into a Css length
/// </summary>
/// <param name="htmlLength"></param>
/// <returns></returns>
public static CssLength TranslateLength(string htmlLength)
{
CssLength len = ParseGenericLength(htmlLength);
if (len.HasError)
{
return(CssLength.MakePixelLength(0));
}
return(len);
}
static CssLength SetLineHeight(this CssBox box, CssLength len)
{
//2014,2015,
//from www.w3c.org/wiki/Css/Properties/line-height
//line height in <percentage> :
//The computed value if the property is percentage multiplied by the
//element's computed font size.
return(CssLength.MakePixelLength(
CssValueParser.ConvertToPx(len, box.GetEmHeight(), box)));
}