add single language mode

modules/docs/app/VoloDocs.Web/Pages/Index.cshtml.cs

@@ -27,10 +27,7 @@ namespace VoloDocs.Web.Pages
         {
             if (_urlUiOptions.SingleProjectMode.Enable)
             {
-                return RedirectToPage("/Documents/Project/Index", new Dictionary<string, object> {
-                    { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.LanguageCode), "en" },
-                    { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.Version), DocsAppConsts.Latest }
-                });
+                return Redirect(GetUrlForProject());
             }
             var projects = await _projectAppService.GetListAsync();
 
@@ -53,18 +50,22 @@ namespace VoloDocs.Web.Pages
         }
 
         //Eg: "/en/abp/latest"
-        public string GetUrlForProject(ProjectDto project, string language = "en", string version = null)
+        public string GetUrlForProject(ProjectDto project = null, string language = "en", string version = null)
         {
             var routeValues = new Dictionary<string, object> {
-                { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.LanguageCode), language },
-                { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.Version), version ?? DocsAppConsts.Latest },
-                { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.ProjectName), project.ShortName }
+                { nameof(Volo.Docs.Pages.Documents.Project.IndexModel.Version), version ?? DocsAppConsts.Latest }
             };
 
             if (!_urlUiOptions.SingleProjectMode.Enable)
             {
-                routeValues.Add(nameof(Volo.Docs.Pages.Documents.Project.IndexModel.ProjectName), project.ShortName);
+                routeValues.Add(nameof(Volo.Docs.Pages.Documents.Project.IndexModel.ProjectName), project?.ShortName);
             }
+            
+            if(_urlUiOptions.MultiLanguageMode)
+            {
+                routeValues.Add(nameof(Volo.Docs.Pages.Documents.Project.IndexModel.LanguageCode), language);
+            }
+            
             return Url.Page("/Documents/Project/Index", routeValues);
         }
     }

modules/docs/app/VoloDocs.Web/VoloDocsWebModule.cs

@@ -80,6 +80,7 @@ namespace VoloDocs.Web
                 options.RoutePrefix = null;
                 options.SingleProjectMode.Enable = true;
                 options.SingleProjectMode.ProjectName = "abp";
+                options.MultiLanguageMode = false;
             });
 
             Configure<DocsElasticSearchOptions>(options =>

modules/docs/src/Volo.Docs.Web/DocsUiOptions.cs

@@ -33,6 +33,8 @@ namespace Volo.Docs
         /// </summary>
         public bool SectionRendering = true;
         
+        public bool MultiLanguageMode { get; set; } = true;
+        
         public SingleProjectModeOptions SingleProjectMode { get; } = new ();
         
         public Func<DocsUrlNormalizerContext, string> UrlNormalizer { get; set; }

modules/docs/src/Volo.Docs.Web/DocsWebModule.cs

@@ -60,6 +60,8 @@ namespace Volo.Docs
                     .Value.Value;
 
                 var routePrefix = docsOptions.RoutePrefix;
+                
+                var languageCode = docsOptions.MultiLanguageMode ? "{languageCode}/" : string.Empty;
 
                 if (docsOptions.SingleProjectMode.Enable)
                 {
@@ -67,16 +69,22 @@ namespace Volo.Docs
                     {
                         options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix);
                     }
-                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{languageCode}");
-                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{languageCode}/{version}/{*documentName}");
-                    options.Conventions.AddPageRoute("/Documents/Search", routePrefix + "search/{languageCode}/{version}");
+                    if(routePrefix + languageCode != "/")
+                    {
+                        options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + languageCode);
+                    }
+                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + languageCode + "{version}/{*documentName}");
+                    options.Conventions.AddPageRoute("/Documents/Search", routePrefix + "search/" + languageCode + "{version}");
                 }
                 else
                 {
-                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{projectName}");
-                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{languageCode}/{projectName}");
-                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{languageCode}/{projectName}/{version}/{*documentName}");
-                    options.Conventions.AddPageRoute("/Documents/Search", routePrefix + "search/{languageCode}/{projectName}/{version}");
+                    if(routePrefix + languageCode != "/")
+                    {
+                        options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + "{projectName}");
+                    }
+                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + languageCode +  "{projectName}");
+                    options.Conventions.AddPageRoute("/Documents/Project/Index", routePrefix + languageCode + "{projectName}/{version}/{*documentName}");
+                    options.Conventions.AddPageRoute("/Documents/Search", routePrefix + "search/" + languageCode + "{projectName}/{version}");
                 }
             });
 

modules/docs/src/Volo.Docs.Web/Markdown/MarkdownDocumentToHtmlConverter.cs

@@ -51,7 +51,7 @@ namespace Volo.Docs.Markdown
                 _uiOptions.SingleProjectMode.Enable ? projectShortName : projectShortName ?? project.ShortName,
                 version,
                 document.LocalDirectory,
-                languageCode
+                !_uiOptions.MultiLanguageMode ? languageCode : languageCode ?? document.LanguageCode
             );
 
             var html = _markdownConverter.ConvertToHtml(content);

modules/docs/src/Volo.Docs.Web/Pages/Documents/Project/Index.cshtml

@@ -384,7 +384,7 @@
                     <div data-spy="scroll" data-bs-target="#docs-sticky-index" data-offset="0">
                         <article class="docs-body">
 
-                            @if (Model.DocumentLanguageCode != Model.LanguageCode)
+                            @if (Model.LanguageCode != null && Model.DocumentLanguageCode != Model.LanguageCode)
                             {
                                 <abp-alert alert-type="Warning" dismissible="true" class="mb-0">
                                     @L["DocumentNotFoundInSelectedLanguage"]

modules/docs/src/Volo.Docs.Web/Pages/Documents/Project/Index.cshtml.cs

@@ -165,13 +165,15 @@ namespace Volo.Docs.Pages.Documents.Project
             {
                 return RedirectToDefaultDocument();
             }
+            
+            var usingSingleLanguageMode = !_uiOptions.MultiLanguageMode && LanguageCode.IsNullOrWhiteSpace();
 
-            if (!CheckLanguage())
+            if (!usingSingleLanguageMode && !CheckLanguage())
             {
                 return RedirectToDefaultLanguage();
             }
 
-            if (IsDocumentCultureDifferentThanCurrent())
+            if (!usingSingleLanguageMode && IsDocumentCultureDifferentThanCurrent())
             {
                 return ReloadPageWithCulture();
             }
@@ -445,7 +447,7 @@ namespace Volo.Docs.Pages.Documents.Project
                     new GetNavigationDocumentInput
                     {
                         ProjectId = Project.Id,
-                        LanguageCode = LanguageCode,
+                        LanguageCode = DocumentLanguageCode,
                         Version = Version
                     }
                 );
@@ -488,7 +490,7 @@ namespace Volo.Docs.Pages.Documents.Project
             }
 
             var documentNames = new[] { DocumentName, documentPath.EnsureEndsWith('/') + "Index", documentPath.EnsureEndsWith('/') + "index" }.Distinct().ToArray();
-            var languages = new[] { LanguageCode, DefaultLanguageCode }.Distinct().ToArray();
+            var languages = new[] { LanguageCode, DefaultLanguageCode }.Where(x => !x.IsNullOrWhiteSpace()).Distinct().ToArray();
             var sb = new StringBuilder();
             foreach (var documentName in documentNames)
             {
@@ -517,6 +519,11 @@ namespace Volo.Docs.Pages.Documents.Project
         {
             LanguageSelectListItems = new List<SelectListItem>();
 
+            if (!_uiOptions.MultiLanguageMode)
+            {
+                return;
+            }
+
             foreach (var language in LanguageConfig.Languages)
             {
                 LanguageSelectListItems.Add(