/// <summary>
/// Working similar to SelectSingle but not throwing exceptions on error (simply return first result)
/// </summary>
/// <param name="xpath"></param>
/// <returns></returns>
public GeckoNode SelectFirst(string xpath)
{
var r = EvaluateXPathInternal(xpath);
nsIDOMNode singleNode = null;
using (var context = new AutoJSContext())
{
var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)r);
// TODO: (Idenally I would generate these calls via a webidl-> C# compiler but for now just do it via manually written spidermonkey calls..)
var resultType = SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "resultType").ToInteger();
switch (resultType)
{
case nsIDOMXPathResultConsts.UNORDERED_NODE_ITERATOR_TYPE:
singleNode = (nsIDOMNode)SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext", new JsVal[0]).ToComObject(context.ContextPointer);
break;
case nsIDOMXPathResultConsts.FIRST_ORDERED_NODE_TYPE:
case nsIDOMXPathResultConsts.ANY_UNORDERED_NODE_TYPE:
singleNode = (nsIDOMNode)SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "singleNodeValue").ToComObject(context.ContextPointer);
break;
}
var ret = singleNode.Wrap(GeckoNode.Create);
Xpcom.FreeComObject(ref r);
return(ret);
}
}
public GeckoNode SelectSingle(string xpath)
{
var r = EvaluateXPathInternal(xpath);
nsIDOMNode singleNode = null;
using (var context = new AutoJSContext(Window))
using (var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)r))
{
// TODO: (Idenally I would generate these calls via a webidl-> C# compiler but for now just do it via manually written spidermonkey calls..)
var resultType = SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject.JSObject, "resultType").ToInteger();
#if PORTFF60
switch (resultType)
{
case nsIDOMXPathResultConsts.UNORDERED_NODE_ITERATOR_TYPE:
singleNode =
(nsIDOMNode)
SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext",
new JsVal[0]).ToComObject(context.ContextPointer);
var test =
(SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext",
new JsVal[0]));
if (!test.IsNull)
{
Xpcom.FreeComObject(ref singleNode);
Xpcom.FreeComObject(ref r);
throw new GeckoDomException("There are more than 1 nodes in Single selection");
}
break;
case nsIDOMXPathResultConsts.FIRST_ORDERED_NODE_TYPE:
case nsIDOMXPathResultConsts.ANY_UNORDERED_NODE_TYPE:
singleNode =
(nsIDOMNode)
SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "singleNodeValue")
.ToComObject(context.ContextPointer);
break;
}
#endif
throw new NotImplementedException();
}
#if PORTFF60
var ret = singleNode.Wrap(GeckoNode.Create);
Xpcom.FreeComObject(ref r);
return(ret);
#endif
}
public IEnumerator <GeckoNode> GetEnumerator()
{
using (var context = new AutoJSContext())
{
var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)xpathResult);
JsVal jsVal;
do
{
while (
!(jsVal = SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext")).IsNull)
{
yield return((jsVal.ToComObject(context.ContextPointer) as nsIDOMNode).Wrap(GeckoNode.Create));
}
} while (!jsVal.IsNull);
}
}
/// <summary>
/// Gets the nsIXPCComponents which is the javascript 'Components' objects
/// The Components objects is the main object XPConnect object.
/// </summary>
/// <returns></returns>
internal nsIXPCComponents GetComponentsObject()
{
if (_nsIXPCComponents == null)
{
var jsValue = new JsVal();
SpiderMonkey.JS_ExecuteScript(ContextPointer, "this.myfunc = function(p1) { return Components; };",
out jsValue);
jsValue = SpiderMonkey.JS_CallFunctionName(ContextPointer, _globalJSObject, "myfunc", new[] { jsValue });
_nsIXPCComponents = Xpcom.QueryInterface <nsIXPCComponents>(jsValue.ToObject());
if (_nsIXPCComponents == null)
{
throw new GeckoException(String.Format(
"Components object does not implement nsIXPCComponents. {0}", jsValue));
}
}
return(_nsIXPCComponents);
}
