private static int TagCost(HTMLBalancerCostFilter costFilter, ArrayList openTags, Tag tag)
{
try
{
checked
{
int baseTagCost = costFilter.ElementCost(tag);
if (tag is BeginTag)
{
return baseTagCost + ((TagRequiresClose(tag.Name)) ? costFilter.ElementCost(MakeEndTag(tag.Name)) : 0);
}
else if (tag is EndTag)
{
if (LastIndexOf(openTags, tag) != -1)
return baseTagCost - costFilter.ElementCost(MakeEndTag(tag.Name));
else
return baseTagCost;
}
else
{
Trace.Fail("Unknown tag type");
return baseTagCost;
}
}
}
catch (OverflowException)
{
return int.MaxValue;
}
}
private static void RegisterTag(ArrayList openTags, Tag tag)
{
if (tag is BeginTag && TagRequiresClose(tag.Name))
{
openTags.Add(tag.Name);
}
else if (tag is EndTag)
{
int idx = LastIndexOf(openTags, tag);
if (idx != -1)
openTags.RemoveAt(idx);
}
}
private static int LastIndexOf(ArrayList openTags, Tag tag)
{
for (int i = openTags.Count - 1; i >= 0; i--)
{
if (tag.NameEquals((string)openTags[i]))
{
return i;
}
}
return -1;
}
private void EmitTagAndAttributes(string tagName, Tag tag)
{
BeginTag beginTag = tag as BeginTag;
if (beginTag != null)
{
Emit(string.Format(CultureInfo.InvariantCulture, "<{0}", tagName));
foreach (Attr attr in beginTag.Attributes)
if (PreserveAttributes.Contains(attr.Name.ToUpper(CultureInfo.InvariantCulture)))
Emit(" " + attr.ToString());
if (beginTag.Complete)
Emit("/");
Emit(">");
}
else
{
if (tagName.ToUpper(CultureInfo.InvariantCulture) != HTMLTokens.Br && tagName.ToUpper(CultureInfo.InvariantCulture) != HTMLTokens.Img)
Emit(string.Format(CultureInfo.InvariantCulture, "</{0}>", tagName));
}
}
