internal static ScriptRequestProcessor Create(HtmlScriptElement script)
{
var document = script.Owner;
var loader = document.Loader;
return(new ScriptRequestProcessor(script, loader));
}
public ScriptRequestProcessor(IBrowsingContext context, HtmlScriptElement script)
{
_context = context;
_document = script.Owner;
_script = script;
_loader = context.GetService <IResourceLoader>() !;
}
public override IHtmlElement Create(HtmlAttributesCollection attributes, string html, int startContentIndex, int endContentIndex, IHtmlParserManager htmlParserManager)
{
HtmlScriptElement element = new HtmlScriptElement();
element.Attributes = attributes;
element.Text(html.SubStringToIndex(startContentIndex, endContentIndex - 1), true);
return(element);
}
private void RaiseBeforeScriptExecute(HtmlScriptElement script)
{
BeforeScriptExecute?.Invoke(script);
var evt = script.OwnerDocument.CreateEvent("Event");
evt.InitEvent("BeforeScriptExecute", true, false);
script.DispatchEvent(evt);
}
private void RaiseScriptExecutionError(HtmlScriptElement script, Exception ex)
{
ScriptExecutionError?.Invoke(script, ex);
var evt = (ErrorEvent)script.OwnerDocument.CreateEvent("ErrorEvent");
evt.ErrorEventInit(ex.Message, script.Src ?? "...", 0, 0, ex);
evt.Target = script;
script.OwnerDocument.DispatchEvent(evt);
}
//todo: revise it. it shouldn't be here.
internal static async Task <string> LoadAsync(HtmlScriptElement script, Func <string, Task <IResource> > getResourceAsyncFn)
{
if (string.IsNullOrEmpty(script.Src))
{
throw new InvalidOperationException("Src not set.");
}
var resource = await getResourceAsyncFn(script.Src);
try
{
using (var reader = new StreamReader(resource.Stream))
return(reader.ReadToEnd());
}
catch
{
lock (script.OwnerDocument)
{
script.RaiseEvent("error", false, false);
}
}
return(null);
}
internal void AddScript(HtmlScriptElement script)
{
_loadingScripts.Enqueue(script);
}
private static bool IsExternalScript(HtmlScriptElement script) => !string.IsNullOrEmpty(script.Src);
public ScriptInfo(HtmlScriptElement node, string code)
{
Node = node;
Code = code;
}
private ScriptRequestProcessor(HtmlScriptElement script, IResourceLoader loader)
{
_script = script;
_document = script.Owner;
_loader = loader;
}
private bool TryExecuteScript(HtmlScriptElement script)
{
throw new NotImplementedException();
}
void HandleScript(HtmlScriptElement script)
{
bool haveSrc = _attributes.Find((a) => { return a.name == "src"; }) != null;
bool haveDefer = _attributes.Find((a) => { return a.name == "defer"; }) != null;
bool haveAsync = _attributes.Find((a) => { return a.name == "async"; }) == null;
if (haveSrc && haveDefer && !haveAsync)
{
_finishParsingScr.Add(new HtmlScriptElement()); //BLANK
}
else if (haveSrc && !haveAsync)
{
_pendingScr.Add(new HtmlScriptElement()); //BLANK
}
else if (!haveSrc)
{
if (!TryExecuteScript())
{
_pendingScr.Add(new HtmlScriptElement());
}
}
else if (haveSrc && !haveAsync)
{
if (!TryExecuteScript())
{
_pendingScr.Add(new HtmlScriptElement());
}
}
else if (haveSrc)
{
if (!TryExecuteScript())
{
_pendingScr.Add(new HtmlScriptElement());
}
}
else
{
//The user agent must immediately execute the script block, even if other scripts are already executing.
//нужно ли добавлять в лист скриптов если не возникла ошибка исполнения
if (!TryExecuteScript())
{
_pendingScr.Add(new HtmlScriptElement());
}
}
//в любом случае нужно добавить скрипт или в лист скриптов после загрузки документа для исполнения или добавить элемент в список скриптов к документу
}
