osu/osu.Game/Overlays/WikiOverlay.cs

155 lines
4.4 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Linq;
using System.Threading;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Game.Online.API;
using osu.Game.Online.API.Requests;
using osu.Game.Online.API.Requests.Responses;
using osu.Game.Overlays.Wiki;
namespace osu.Game.Overlays
{
public class WikiOverlay : OnlineOverlay<WikiHeader>
{
private const string index_path = @"main_page";
private readonly Bindable<string> path = new Bindable<string>(index_path);
private readonly Bindable<APIWikiPage> wikiData = new Bindable<APIWikiPage>();
[Resolved]
private IAPIProvider api { get; set; }
private GetWikiRequest request;
private CancellationTokenSource cancellationToken;
private bool displayUpdateRequired = true;
private WikiArticlePage articlePage;
public WikiOverlay()
: base(OverlayColourScheme.Orange, false)
{
}
public void ShowPage(string pagePath = index_path)
{
path.Value = pagePath.Trim('/');
Show();
}
protected override WikiHeader CreateHeader() => new WikiHeader
{
ShowIndexPage = () => ShowPage(),
ShowParentPage = showParentPage,
};
protected override void LoadComplete()
{
base.LoadComplete();
path.BindValueChanged(onPathChanged);
wikiData.BindTo(Header.WikiPageData);
}
protected override void PopIn()
{
base.PopIn();
if (displayUpdateRequired)
{
path.TriggerChange();
displayUpdateRequired = false;
}
}
protected override void PopOutComplete()
{
base.PopOutComplete();
displayUpdateRequired = true;
}
protected void LoadDisplay(Drawable display)
{
ScrollFlow.ScrollToStart();
LoadComponentAsync(display, loaded =>
{
Child = loaded;
Loading.Hide();
}, (cancellationToken = new CancellationTokenSource()).Token);
}
protected override void UpdateAfterChildren()
{
base.UpdateAfterChildren();
if (articlePage != null)
{
articlePage.SidebarContainer.Height = DrawHeight;
articlePage.SidebarContainer.Y = Math.Clamp(ScrollFlow.Current - Header.DrawHeight, 0, Math.Max(ScrollFlow.ScrollContent.DrawHeight - DrawHeight - Header.DrawHeight, 0));
}
}
private void onPathChanged(ValueChangedEvent<string> e)
{
cancellationToken?.Cancel();
request?.Cancel();
request = new GetWikiRequest(e.NewValue);
Loading.Show();
request.Success += response => Schedule(() => onSuccess(response));
request.Failure += _ => Schedule(onFail);
api.PerformAsync(request);
}
private void onSuccess(APIWikiPage response)
{
wikiData.Value = response;
if (response.Layout == index_path)
{
LoadDisplay(new WikiMainPage
{
Markdown = response.Markdown,
Padding = new MarginPadding
{
Vertical = 20,
Horizontal = 50,
},
});
}
else
{
LoadDisplay(articlePage = new WikiArticlePage($@"{api.WebsiteRootUrl}/wiki/{path.Value}/", response.Markdown));
}
}
private void onFail()
{
LoadDisplay(articlePage = new WikiArticlePage($@"{api.WebsiteRootUrl}/wiki/",
$"Something went wrong when trying to fetch page \"{path.Value}\".\n\n[Return to the main page](Main_Page)."));
}
private void showParentPage()
{
var parentPath = string.Join("/", path.Value.Split('/').SkipLast(1));
ShowPage(parentPath);
}
protected override void Dispose(bool isDisposing)
{
cancellationToken?.Cancel();
request?.Cancel();
base.Dispose(isDisposing);
}
}
}