/// <summary>
///
/// </summary>
/// <param name="style"></param>
/// <returns></returns>
public static HtmlStyleAttributeCollection Parse(string style)
{
HtmlStyleAttributeCollection result = new HtmlStyleAttributeCollection();
if (style.IsNullOrEmpty())
{
return(result);
}
using (HtmlStyleParserContext context = new HtmlStyleParserContext())
{
HtmlStyleAttribute currentStyleAttr = new HtmlStyleAttribute();
while (context.Index < style.Length)
{
switch (context.Stage)
{
case HtmlStyleParsingStage.None:
{
if (SkipNotLetter(context, style))
{
context.Stage = HtmlStyleParsingStage.KeyStage;
currentStyleAttr = new HtmlStyleAttribute();
}
break;
}
case HtmlStyleParsingStage.KeyStage:
{
if (style[context.Index] != ':')
{
context.Writer.Write(style[context.Index++]);
}
else
{
currentStyleAttr.Key = context.ChangeStage(HtmlStyleParsingStage.ValueStage);
context.Index++;
}
break;
}
case HtmlStyleParsingStage.ValueStage:
{
if (style[context.Index] != ';')
{
context.Writer.Write(style[context.Index++]);
}
else
{
currentStyleAttr.Value = context.ChangeStage(HtmlStyleParsingStage.None);
currentStyleAttr.Expression = ParseValue(currentStyleAttr.Value);
result.AddNotExistsItem(currentStyleAttr);
currentStyleAttr = null;
context.Index++;
}
break;
}
}
}
currentStyleAttr = DoStylePostOperation(context, currentStyleAttr);
if (currentStyleAttr != null)
{
result.AddNotExistsItem(currentStyleAttr);
}
}
return(result);
}
private static HtmlStyleAttribute DoStylePostOperation(HtmlStyleParserContext context, HtmlStyleAttribute currentStyleAttr)
{
if (currentStyleAttr != null)
{
switch (context.Stage)
{
case HtmlStyleParsingStage.KeyStage:
currentStyleAttr.Key = context.ChangeStage(HtmlStyleParsingStage.ValueStage);
currentStyleAttr.Expression = ParseValue(currentStyleAttr.Value);
break;
case HtmlStyleParsingStage.ValueStage:
currentStyleAttr.Value = context.ChangeStage(HtmlStyleParsingStage.None);
currentStyleAttr.Expression = ParseValue(currentStyleAttr.Value);
break;
}
}
return(currentStyleAttr);
}