public void Populate(List <object> items)
{
/*
* This caching logic reduces average pagination speed from ~450 to ~350
* (Tested on Android, Samsung Galaxy Tab S2)
* Not as much as I'd hoped for, but it's something.
*
* Updating layout in itself takes 100ms.
* A view's construction takes ~10ms, fetching it from cache takes ~1ms
*
* Using the same HubClient.PageSize (25) views each time, just changing the content,
* not even updating layout, and then hiding some if it's the final page
* would somewhat improve performance, but is rather unnecessary
*
* Currenty disabled cache, as it caused click event anomalies,
* to re-enable, simply add items to cache after adding the views,
* and when constructing a FileListPopupItem, check cache.Count > 0
*/
Children.Clear();
System.Threading.Tasks.Task.Run(delegate
{
foreach (object item in items)
{
FileListPopupItem
view = new FileListPopupItem();
if (item is DriveFile)
{
view.DriveFile = (DriveFile)item;
}
else
{
view.GithubFile = (GithubFile)item;
}
view.Initialize();
view.Click -= OnItemClick;
view.Click += OnItemClick;
Device.BeginInvokeOnMainThread(delegate
{
AddSubview(view);
});
}
Device.BeginInvokeOnMainThread(delegate
{
LayoutSubviews();
});
});
}
async void OnItemClicked(object sender, EventArgs e)
{
FileListPopupItem item = (FileListPopupItem)sender;
if (!item.IsEnabled)
{
Alert("This style is not publicly available and cannot be downloaded");
return;
}
Device.BeginInvokeOnMainThread(delegate
{
if (item.GithubFile == null)
{
// Do not Hide the popup when dealing with github,
// as a new page should load almost immediately
// and we need to show content there as well
ContentView.FileList.Hide();
}
ContentView.ShowLoading();
});
if (item.DriveFile != null)
{
#if __ANDROID__
/*
* Android uses a full-fledged Google Drive component.
* No need to manually handle clicks -> Goes straight to FileDownloadComplete()
*/
#elif __IOS__
DriveClientiOS.Instance.DownloadStyle(item.DriveFile.Id, item.DriveFile.Name);
#elif __UWP__
Stream stream = await DriveClientUWP.Instance.DownloadStyle(item.DriveFile.Id, item.DriveFile.Name);
if (stream == null)
{
Device.BeginInvokeOnMainThread(delegate
{
ContentView.Popup.Show();
ContentView.HideLoading();
item.Disable();
Alert("This style is not publicly available and cannot be downloaded");
});
}
else
{
OnFileDownloadComplete(null, new DownloadEventArgs {
Name = item.DriveFile.Name, Stream = stream
});
}
#endif
}
else if (item.GithubFile != null)
{
/*
* Ignore file clicks
*/
if (item.GithubFile.IsDirectory)
{
if (item.GithubFile.IsRepository)
{
GithubOwner = item.GithubFile.Owner;
GithubRepo = item.GithubFile.Name;
GithubId = item.GithubFile.Id;
ContentView.FileList.Pages.Hide();
ContentView.FileList.Branches.IsVisible = true;
}
else
{
ContentView.FileList.Branches.IsVisible = false;
}
GithubPath = item.GithubFile.Path;
await LoadGithubContents();
if (item.GithubFile.IsRepository)
{
var branches = await HubClient.Instance.GetBranches(GithubOwner, GithubRepo);
ContentView.FileList.Branches.Add(branches);
ContentView.FileList.Branches.Highlight(CurrentBranch);
}
}
}
}
