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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure;
using Microsoft.Extensions.Options;
namespace Microsoft.Extensions.DependencyInjection;
internal sealed class RazorPagesRazorViewEngineOptionsSetup : IConfigureOptions<RazorViewEngineOptions>
{
private readonly RazorPagesOptions _pagesOptions;
public RazorPagesRazorViewEngineOptionsSetup(IOptions<RazorPagesOptions> pagesOptions)
{
_pagesOptions = pagesOptions?.Value ?? throw new ArgumentNullException(nameof(pagesOptions));
}
public void Configure(RazorViewEngineOptions options)
{
ArgumentNullException.ThrowIfNull(options);
var rootDirectory = _pagesOptions.RootDirectory;
Debug.Assert(!string.IsNullOrEmpty(rootDirectory));
var defaultPageSearchPath = CombinePath(rootDirectory, "{1}/{0}" + RazorViewEngine.ViewExtension);
options.PageViewLocationFormats.Add(defaultPageSearchPath);
// /Pages/Shared/{0}.cshtml
var pagesSharedDirectory = CombinePath(rootDirectory, "Shared/{0}" + RazorViewEngine.ViewExtension);
options.PageViewLocationFormats.Add(pagesSharedDirectory);
options.PageViewLocationFormats.Add("/Views/Shared/{0}" + RazorViewEngine.ViewExtension);
var areaDirectory = CombinePath("/Areas/", "{2}");
// Areas/{2}/Pages/
var areaPagesDirectory = CombinePath(areaDirectory, "/Pages/");
// Areas/{2}/Pages/{1}/{0}.cshtml
// Areas/{2}/Pages/Shared/{0}.cshtml
// Areas/{2}/Views/Shared/{0}.cshtml
// Pages/Shared/{0}.cshtml
// Views/Shared/{0}.cshtml
var areaSearchPath = CombinePath(areaPagesDirectory, "{1}/{0}" + RazorViewEngine.ViewExtension);
options.AreaPageViewLocationFormats.Add(areaSearchPath);
var areaPagesSharedSearchPath = CombinePath(areaPagesDirectory, "Shared/{0}" + RazorViewEngine.ViewExtension);
options.AreaPageViewLocationFormats.Add(areaPagesSharedSearchPath);
var areaViewsSharedSearchPath = CombinePath(areaDirectory, "Views/Shared/{0}" + RazorViewEngine.ViewExtension);
options.AreaPageViewLocationFormats.Add(areaViewsSharedSearchPath);
options.AreaPageViewLocationFormats.Add(pagesSharedDirectory);
options.AreaPageViewLocationFormats.Add("/Views/Shared/{0}" + RazorViewEngine.ViewExtension);
options.ViewLocationFormats.Add(pagesSharedDirectory);
options.AreaViewLocationFormats.Add(pagesSharedDirectory);
options.ViewLocationExpanders.Add(new PageViewLocationExpander());
}
private static string CombinePath(string path1, string path2)
{
if (path1.EndsWith('/') || path2.StartsWith('/'))
{
return path1 + path2;
}
else if (path1.EndsWith('/') && path2.StartsWith('/'))
{
return string.Concat(path1, path2.AsSpan(1));
}
return path1 + "/" + path2;
}
}
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