Fix Sidebar enabled check

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

apps/files/js/filelist.js

@@ -3650,8 +3650,9 @@
 		registerTabView: function(tabView) {
 			console.warn('registerTabView is deprecated! It will be removed in nextcloud 20.');
 			const name = tabView.getLabel()
+			const enabled = tabView.canDisplay || undefined
 			if (name) {
-				OCA.Files.Sidebar.registerTab(new OCA.Files.Sidebar.Tab(name, tabView, true))
+				OCA.Files.Sidebar.registerTab(new OCA.Files.Sidebar.Tab(name, tabView, enabled, true))
 			}
 		},
 

apps/files/src/models/Tab.js

@@ -22,20 +22,27 @@
 
 export default class Tab {
 
-	#component;
-	#legacy;
-	#name;
+	#component
+	#legacy
+	#name
+	#enabled
 
 	/**
 	 * Create a new tab instance
 	 *
 	 * @param {string} name the name of this tab
 	 * @param {Object} component the vue component
+	 * @param {Function} [enabled] function that returns if the tab should be shown or not
 	 * @param {boolean} [legacy] is this a legacy tab
 	 */
-	constructor(name, component, legacy) {
+	constructor(name, component, enabled = () => true, legacy) {
+		if (typeof enabled !== 'function') {
+			throw new Error('The enabled argument should be a function')
+		}
+
 		this.#name = name
 		this.#component = component
+		this.#enabled = enabled
 		this.#legacy = legacy === true
 
 		if (this.#legacy) {
@@ -52,6 +59,10 @@ export default class Tab {
 		return this.#component
 	}
 
+	get isEnabled() {
+		return this.#enabled
+	}
+
 	get isLegacyTab() {
 		return this.#legacy === true
 	}

apps/files/src/views/Sidebar.vue

@@ -255,11 +255,7 @@ export default {
 		 * @returns {boolean}
 		 */
 		canDisplay(tab) {
-			if (tab.isLegacyTab) {
-				return this.fileInfo && tab.component.canDisplay && tab.component.canDisplay(this.fileInfo)
-			}
-			// if the tab does not have an enabled method, we assume it's always available
-			return tab.enabled ? tab.enabled(this.fileInfo) : true
+			return tab.isEnabled(this.fileInfo)
 		},
 		onClose() {
 			this.resetData()