Make top bar link relative

WebsiteGenerator/Content/Element.swift

@@ -325,6 +325,17 @@ extension Element {
                         + pageParts.dropFirst(index)
         return allParts.joined(separator: "/")
     }
+
+    /**
+     The relative path to the site root.
+     */
+    var pathToRoot: String? {
+        guard path != "" else {
+            return nil
+        }
+        let downPathCount = path.components(separatedBy: "/").count
+        return [String](repeating: "..", count: downPathCount).joined(separator: "/")
+    }
     
     /**
      Create an absolute path (relative to the root directory) for a file contained in the elements folder.

WebsiteGenerator/Generators/HTMLElementsGenerator.swift

@@ -10,9 +10,11 @@ struct HTMLElementsGenerator {
         "\(title)<span class=\"suffix\">\(suffix)</span>"
     }
 
-    // - TODO: Make link relative
+    func topBarWebsiteTitle(language: String, from page: Element) -> String {
-    func topBarWebsiteTitle(language: String) -> String {
+        guard let pathToRoot = page.pathToRoot else {
-        Element.htmlPagePathAddition(for: language)
+            return Element.htmlPageName(for: language)
+        }
+        return pathToRoot + Element.htmlPagePathAddition(for: language)
     }
 
     func topBarLanguageButton(_ language: String) -> String {

WebsiteGenerator/Generators/OverviewPageGenerator.swift

@@ -21,7 +21,8 @@ struct OverviewPageGenerator {
             let languageButton = section.nextLanguage(for: language)
             content[.topBar] = factory.topBar.generate(
                 sectionUrl: section.sectionUrl(for: language),
-                languageButton: languageButton)
+                languageButton: languageButton,
+                page: section)
             content[.contentClass] = "overview"
             content[.header] = makeHeader(page: section, metadata: metadata, language: language)
             content[.content] = makeContent(section: section, language: language)

WebsiteGenerator/Generators/PageGenerator.swift

@@ -30,7 +30,7 @@ struct PageGenerator {
         var content = [PageTemplate.Key : String]()
         content[.head] = factory.pageHead.generate(page: page, language: language, includesCode: pageIncludesCode)
         let sectionUrl = page.sectionUrl(for: language)
-        content[.topBar] = factory.topBar.generate(sectionUrl: sectionUrl, languageButton: nextLanguage)
+        content[.topBar] = factory.topBar.generate(sectionUrl: sectionUrl, languageButton: nextLanguage, page: page)
         content[.contentClass] = "content"
 
         if !page.useCustomHeader {

WebsiteGenerator/Templates/Filled/PrefilledTopBarTemplate.swift

@@ -17,10 +17,10 @@ struct PrefilledTopBarTemplate {
         self.topBarWebsiteTitle = topBarWebsiteTitle
     }
 
-    func generate(sectionUrl: String?, languageButton: String?) -> String {
+    func generate(sectionUrl: String?, languageButton: String?, page: Element) -> String {
         var content = [TopBarTemplate.Key : String]()
         content[.title] = topBarWebsiteTitle
-        content[.titleLink] = factory.html.topBarWebsiteTitle(language: language)
+        content[.titleLink] = factory.html.topBarWebsiteTitle(language: language, from: page)
         content[.elements] = elements(activeSectionUrl: sectionUrl)
         content[.languageButton] = languageButton.unwrapped(factory.html.topBarLanguageButton) ?? ""
         return factory.topBar.generate(content)