public IEnumerable <GalleryItem> FilterTag(IEnumerable <GalleryItem> items, SkipCounterWrapper counter, Gallery gallery = null)
{
var option = SettingManager.LoadSetting <GlobalSetting>();
IEnumerable <Gallery> galleries = gallery == null?Container.Default.GetExportedValues <Gallery>() : new[] { gallery };
return(items.Where(x =>
{
if (galleries.FirstOrDefault(g => g.GalleryName == x.GalleryName) is Gallery gallery && gallery.GetImageDetial(x) is GalleryImageDetail detail)
{
if (!option.EnableTagFilter)
{
return true;
}
//todo: optimze them
switch (ViewType)
{
case GalleryViewType.Marked:
if (!option.FilterTarget.HasFlag(TagFilterTarget.MarkedWindow))
{
return true;
}
break;
case GalleryViewType.Voted:
if (!option.FilterTarget.HasFlag(TagFilterTarget.VotedWindow))
{
return true;
}
break;
case GalleryViewType.Main:
if (!option.FilterTarget.HasFlag(TagFilterTarget.MainWindow))
{
return true;
}
break;
case GalleryViewType.SearchResult:
if (!option.FilterTarget.HasFlag(TagFilterTarget.SearchResultWindow))
{
return true;
}
break;
case GalleryViewType.History:
if (!option.FilterTarget.HasFlag(TagFilterTarget.HistoryWindow))
{
return true;
}
break;
default:
break;
}
var filter_list = option.UseAllGalleryFilterList ? TagManager.FiltedTags : TagManager.FiltedTags.Where(x => x.FromGallery == gallery.GalleryName);
foreach (var filter_tag in filter_list)
{
if (detail.Tags.FirstOrDefault(x => x == filter_tag.Tag.Name) is string captured_filter_tag)
{
Log.Debug($"Skip this item because of filter:{captured_filter_tag} -> {string.Join(" ", detail.Tags)}");
counter.Count++;
return false;
}
}
}
return true;
}));
}
private async void TryRequestMoreItemFromLoadableSource()
{
if (is_requesting)
{
Log.Debug("Task is running");
return;
}
if (loadable_items == null)
{
return;
}
OnRequestMoreItemStarted?.Invoke(this);
var option = SettingManager.LoadSetting <GlobalSetting>();
is_requesting = true;
Gallery gallery = Gallery;
IEnumerable <GalleryItem> source = loadable_items;
var counter = new SkipCounterWrapper();
Log.Debug($"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();
}
}