public void OnDownloadUpdated(IWebBrowser chromiumWebBrowser, IBrowser browser, DownloadItem downloadItem, IDownloadItemCallback callback)
{
DownloadItemViewModel _item = null;
//初始暂停
if (string.IsNullOrWhiteSpace(downloadItem.FullPath))
{
callback.Pause();
}
else//初始化完毕
{
//插入记录
if (!DownloadMap.ContainsKey(downloadItem.Id))
{
_item = new DownloadItemViewModel();
_item.customDownloadHandler = this;
_item.UpDate(downloadItem);
DownloadMap.Add(downloadItem.Id, _item);
//Console.WriteLine("----insert {0}", _item.ID);
}
else
{ //获取对应记录
_item = DownloadMap[downloadItem.Id];
}
//继续开始下载
if (!_item.IsInitalized)
{
_item.IsInitalized = true;
callback.Resume();
}
}
if (_item != null && _item.IsInitalized)
{
_item.UpDate(downloadItem);
//callback管理
if (callback.IsDisposed)
{
Console.WriteLine("Callback disposed");
}
else
{
if (ControlMap.ContainsKey(_item.ID))
{
ControlMap[_item.ID] = callback;
}
else
{
ControlMap.Add(_item.ID, callback);
}
}
//更新
OnUpdated?.BeginInvoke(this, _item, (o) =>
{
if (_item.NeedPause)
{
try { GetControl(_item.ID)?.Pause(); } catch (Exception e) { Console.WriteLine("Cancel Error :{0}", e.Message); }
_item.NeedPause = false;
_item.IsPaused = true;
}
if (_item.NeedCancel)
{
try { GetControl(_item.ID)?.Cancel(); } catch (Exception e) { Console.WriteLine("Cancel Error :{0}", e.Message); }
_item.NeedCancel = false;
_item.IsCancelled = true;
}
if (_item.NeedResume)
{
try { GetControl(_item.ID)?.Resume(); } catch (Exception e) { Console.WriteLine("Resume Error :{0}", e.Message); }
_item.NeedResume = false;
_item.IsPaused = false;
}
OnUpdated.Invoke(this, _item);
}, null);
}
}
