private async void TryRequestMoreItemFromLoadableSource()
{
if (is_requesting)
{
Log.Debug("Task is running");
return;
}
if (loadable_items == null)
{
return;
}
OnRequestMoreItemStarted?.Invoke(this);
var option = SettingManager.LoadSetting <GlobalSetting>();
is_requesting = true;
Gallery gallery = Gallery;
IEnumerable <GalleryItem> source = loadable_items;
(GalleryItem[] list, bool success) = await Task.Run(() => {
try
{
var l = FilterTag(source.Skip(current_index), gallery).Take(option.GetPictureCountPerLoad).ToArray();
return(l, true);
}
catch (Exception e)
{
Toast.ShowMessage($"无法获取图片列表数据:{e.Message}");
return(new GalleryItem[0], false);
}
});
Log.Debug($"Skip({current_index}) Take({option.GetPictureCountPerLoad}) ActualTake({list.Length})", "GridViewer_RequestMoreItems");
Dispatcher.Invoke(new Action(() =>
{
if (source != loadable_items)
{
return;
}
foreach (var item in list)
{
Items.Add(item);
}
if (success && list.Count() < option.GetPictureCountPerLoad)
{
Toast.ShowMessage("已到达图片队列末尾");
}
current_index += list.Length;
}));
OnRequestMoreItemFinished?.Invoke(this);
is_requesting = false;
}
private async void TryRequestMoreItemFromLoadableSource()
{
if (is_requesting)
{
Log.Debug("Task is running");
return;
}
if (loadable_items == null)
{
return;
}
OnRequestMoreItemStarted?.Invoke(this);
var option = SettingManager.LoadSetting <GlobalSetting>();
is_requesting = true;
Gallery gallery = Gallery;
IEnumerable <GalleryItem> source = loadable_items;
var counter = new SkipCounterWrapper();
Log.Debug($"开始尝试获取列表({source.GetHashCode()})");
(GalleryItem[] list, bool success) = await Task.Run(() =>
{
try
{
var l = FilterTag(source.Skip(current_index), counter, gallery).Where(x =>
{
if (unique_items.Contains(x.GalleryItemID))
{
return(false);
}
unique_items.Add(x.GalleryItemID);
return(true);
}).Take(option.GetPictureCountPerLoad).ToArray();
return(l, true);
}
catch (Exception e)
{
Toast.ShowMessage($"无法获取图片列表数据:{e.Message}");
return(new GalleryItem[0], false);
}
});
Log.Debug($"尝试获取列表结束({source.GetHashCode()} - {loadable_items?.GetHashCode()})");
if (source == loadable_items)
{
Log.Debug($"Skip({current_index}) Filter({counter.Count}) Take({option.GetPictureCountPerLoad}) ActualTake({list.Length})", "GridViewer_RequestMoreItems");
foreach (var item in list)
{
Items.Add(item);
}
if (success && list.Count() < option.GetPictureCountPerLoad)
{
Toast.ShowMessage("已到达图片队列末尾");
}
current_index += list.Length + counter.Count;
}
OnRequestMoreItemFinished?.Invoke(this);
is_requesting = false;
if (source != loadable_items && loadable_items != null)
{
TryRequestMoreItemFromLoadableSource();
}
}