/// <summary>
/// Inserts a rule at the specified position in the collection. The return value is the index in the list where the item was actually inserted,
/// or -1 if the rule contains syntax errors and could not be added to the collection.
/// </summary>
/// <param name="index"></param>
/// <param name="rule"></param>
public int Insert(int index, string rule)
{
if (IsReadOnly)
{
throw new InvalidOperationException("This collection is read-only.");
}
else if (index < 0 || index > Count)
{
throw new ArgumentOutOfRangeException("index");
}
else if (string.IsNullOrEmpty(rule))
{
return(-1);
}
const int NS_ERROR_DOM_SYNTAX_ERR = unchecked ((int)0x8053000c);
using (AutoJSContext context = new AutoJSContext(GetJSContext()))
{
context.PushCompartmentScope((nsISupports)StyleSheet._DomStyleSheet);
var val = context.EvaluateScriptBypassingSomeSecurityRestrictions(String.Format("this.insertRule('{0}',{1});", rule, index));
return(val.ToInteger());
}
return(index);
}
nsIDOMCSSRuleList GetRuleList()
{
using (AutoJSContext context = new AutoJSContext(GetJSContext()))
{
context.PushCompartmentScope((nsISupports)StyleSheet._DomStyleSheet);
var val = context.EvaluateScriptBypassingSomeSecurityRestrictions("this.cssRules;");
return((nsIDOMCSSRuleList)val.ToObject());
}
}
/// <summary>
/// Removes all rules from the collection.
/// </summary>
public void Clear()
{
if (IsReadOnly && Count > 0)
{
throw new InvalidOperationException("This collection is read-only.");
}
using (AutoJSContext context = new AutoJSContext(GetJSContext()))
{
context.PushCompartmentScope((nsISupports)StyleSheet._DomStyleSheet);
for (int i = Count - 1; i >= 0; i--)
{
context.EvaluateScriptBypassingSomeSecurityRestrictions(String.Format("deleteRule({0});", i));
}
}
}
/// <summary>
/// Removes a specific rule from the collection.
/// </summary>
/// <param name="index"></param>
public void RemoveAt(int index)
{
if (IsReadOnly)
{
throw new InvalidOperationException("This collection is read-only.");
}
else if (index < 0 || index >= Count)
{
throw new ArgumentOutOfRangeException("index");
}
using (AutoJSContext context = new AutoJSContext(GetJSContext()))
{
context.PushCompartmentScope((nsISupports)StyleSheet._DomStyleSheet);
var val = context.EvaluateScriptBypassingSomeSecurityRestrictions(String.Format("DeleteRule({0});", index));
}
}
