feat: implement F6 Navigation Helper (#4490)

.travis.yml

@@ -15,7 +15,7 @@ before_install:
   - gem install jekyll-seo-tag
 
 script:
-- DEPLOY_PUBLIC_PATH=/resources/ yarn build
+- DEPLOY_PUBLIC_PATH=/resources/ ENABLE_CLDR=1 yarn build
 - yarn test
 
 deploy:

packages/base/hash.txt

@@ -1 +1 @@
-LwpwazozKyw2R4uvmZVLv5VZq7E=
+35rcbBXTa7Q432kQnojY0s3empY=

packages/base/src/Boot.js

@@ -7,7 +7,7 @@ import applyTheme from "./theming/applyTheme.js";
 import { registerCurrentRuntime } from "./Runtimes.js";
 import { getFeature } from "./FeaturesRegistry.js";
 
-let booted = false;
+let bootPromise;
 const eventProvider = new EventProvider();
 
 /**
@@ -20,24 +20,39 @@ const attachBoot = listener => {
 };
 
 const boot = async () => {
-	if (booted) {
-		return;
+	if (bootPromise) {
+		return bootPromise;
 	}
 
-	registerCurrentRuntime();
+	/* eslint-disable no-alert, no-async-promise-executor */
+	/*
+		Note(since we disable eslint rule):
+		If an async executor function throws an error, the error will be lost and won't cause the newly-constructed Promise to reject.
+		This could make it difficult to debug and handle some errors.
+	*/
+	bootPromise = new Promise(async resolve => {
+		registerCurrentRuntime();
 
-	const OpenUI5Support = getFeature("OpenUI5Support");
-	if (OpenUI5Support) {
-		await OpenUI5Support.init();
-	}
+		const OpenUI5Support = getFeature("OpenUI5Support");
+		const F6Navigation = getFeature("F6Navigation");
+		if (OpenUI5Support) {
+			await OpenUI5Support.init();
+		} else if (F6Navigation) {
+			F6Navigation.init();
+		}
+
+		await whenDOMReady();
+		await applyTheme(getTheme());
+		OpenUI5Support && OpenUI5Support.attachListeners();
+		insertFontFace();
+		insertSystemCSSVars();
+		await eventProvider.fireEventAsync("boot");
+
+		resolve();
+	});
+	/* eslint-enable no-alert, no-async-promise-executor */
 
-	await whenDOMReady();
-	await applyTheme(getTheme());
-	OpenUI5Support && OpenUI5Support.attachListeners();
-	insertFontFace();
-	insertSystemCSSVars();
-	await eventProvider.fireEventAsync("boot");
-	booted = true;
+	return bootPromise;
 };
 
 export {

packages/base/src/FeaturesRegistry.js

@@ -8,4 +8,7 @@ const getFeature = name => {
 	return features.get(name);
 };
 
-export { registerFeature, getFeature };
+export {
+	registerFeature,
+	getFeature,
+};

packages/base/src/Keys.js

@@ -191,6 +191,12 @@ const isF4 = event => {
 
 const isF4Shift = event => (event.key ? event.key === "F4" : event.keyCode === KeyCodes.F4) && checkModifierKeys(event, false, false, true);
 
+const isF6Next = event => ((event.key ? event.key === "F6" : event.keyCode === KeyCodes.F6) && checkModifierKeys(event, false, false, false))
+|| ((event.key ? (event.key === "ArrowDown" || event.key === "Down") : event.keyCode === KeyCodes.ARROW_DOWN) && checkModifierKeys(event, true, true, false));
+
+const isF6Previous = event => ((event.key ? event.key === "F6" : event.keyCode === KeyCodes.F6) && checkModifierKeys(event, false, false, true))
+|| ((event.key ? (event.key === "ArrowUp" || event.key === "Up") : event.keyCode === KeyCodes.ARROW_Up) && checkModifierKeys(event, true, true, false));
+
 const isF7 = event => (event.key ? event.key === "F7" : event.keyCode === KeyCodes.F7) && !hasModifierKeys(event);
 
 const isShowByArrows = event => {
@@ -236,6 +242,8 @@ export {
 	isShow,
 	isF4,
 	isF4Shift,
+	isF6Previous,
+	isF6Next,
 	isF7,
 	isPageUp,
 	isPageDown,

packages/base/src/UI5Element.js

@@ -101,6 +101,9 @@ class UI5Element extends HTMLElement {
 	 */
 	async connectedCallback() {
 		this.setAttribute(this.constructor.getMetadata().getPureTag(), "");
+		if (this.constructor.getMetadata().supportsF6FastNavigation()) {
+			this.setAttribute("data-sap-ui-fastnavgroup", "true");
+		}
 
 		const slotsAreManaged = this.constructor.getMetadata().slotsAreManaged();
 

packages/base/src/UI5ElementMetadata.js

@@ -188,6 +188,14 @@ class UI5ElementMetadata {
 		return !!this.metadata.managedSlots;
 	}
 
+	/**
+	 * Determines whether this control supports F6 fast navigation
+	 * @public
+	 */
+	supportsF6FastNavigation() {
+		return !!this.metadata.fastNavigation;
+	}
+
 	/**
 	 * Returns an object with key-value pairs of properties and their metadata definitions
 	 * @public

packages/base/src/util/FocusableElements.js

@@ -5,36 +5,38 @@ const isFocusTrap = el => {
 	return el.hasAttribute("data-ui5-focus-trap");
 };
 
-const getFirstFocusableElement = async container => {
+const getFirstFocusableElement = async (container, startFromContainer) => {
 	if (!container || isNodeHidden(container)) {
 		return null;
 	}
 
-	return findFocusableElement(container, true);
+	return findFocusableElement(container, true, startFromContainer);
 };
 
-const getLastFocusableElement = async container => {
+const getLastFocusableElement = async (container, startFromContainer) => {
 	if (!container || isNodeHidden(container)) {
 		return null;
 	}
 
-	return findFocusableElement(container, false);
+	return findFocusableElement(container, false, startFromContainer);
 };
 
 const isElemFocusable = el => {
 	return el.hasAttribute("data-ui5-focus-redirect") || !isNodeHidden(el);
 };
 
-const findFocusableElement = async (container, forward) => {
+const findFocusableElement = async (container, forward, startFromContainer) => {
 	let child;
 
 	if (container.shadowRoot) {
 		child = forward ? container.shadowRoot.firstChild : container.shadowRoot.lastChild;
 	} else if (container.assignedNodes && container.assignedNodes()) {
 		const assignedElements = container.assignedNodes();
 		child = forward ? assignedElements[0] : assignedElements[assignedElements.length - 1];
+	} else if (startFromContainer) {
+		child = container;
 	} else {
-		child = forward ? container.firstChild : container.lastChild;
+		child = forward ? container.firstElementChild : container.lastElementChild;
 	}
 
 	let focusableDescendant;

packages/base/src/util/isNodeHidden.js

@@ -3,7 +3,7 @@ const isNodeHidden = node => {
 		return false;
 	}
 
-	return (node.offsetWidth <= 0 && node.offsetHeight <= 0) || node.style.visibility === "hidden";
+	return (node.offsetWidth <= 0 && node.offsetHeight <= 0) || (node.style && node.style.visibility === "hidden");
 };
 
 export default isNodeHidden;

packages/fiori/src/Bar.js

@@ -13,6 +13,7 @@ import BarCss from "./generated/themes/Bar.css.js";
 const metadata = {
 	tag: "ui5-bar",
 	managedSlots: true,
+	fastNavigation: true,
 	properties: /** @lends sap.ui.webcomponents.fiori.Bar.prototype */ {
 		/**
 		 * Defines the <code>ui5-bar</code> design.

packages/fiori/src/FlexibleColumnLayout.js

@@ -39,6 +39,7 @@ import FlexibleColumnLayoutCss from "./generated/themes/FlexibleColumnLayout.css
  */
 const metadata = {
 	tag: "ui5-flexible-column-layout",
+	fastNavigation: true,
 	properties: /** @lends sap.ui.webcomponents.fiori.FlexibleColumnLayout.prototype */ {
 		/**
 		 * Defines the columns layout and their proportion.

packages/fiori/src/ShellBar.js

@@ -42,6 +42,7 @@ const HANDLE_RESIZE_DEBOUNCE_RATE = 200; // ms
 const metadata = {
 	tag: "ui5-shellbar",
 	languageAware: true,
+	fastNavigation: true,
 	properties: /** @lends sap.ui.webcomponents.fiori.ShellBar.prototype */ {
 
 		/**

packages/fiori/src/SideNavigation.js

@@ -18,6 +18,7 @@ import SideNavigationPopoverCss from "./generated/themes/SideNavigationPopover.c
 const metadata = {
 	tag: "ui5-side-navigation",
 	managedSlots: true,
+	fastNavigation: true,
 	properties: /** @lends sap.ui.webcomponents.fiori.SideNavigation.prototype */ {
 		/**
 		 * Defines whether the <code>ui5-side-navigation</code> is expanded or collapsed.

packages/fiori/src/Wizard.js

@@ -56,6 +56,7 @@ const STEP_SWITCH_THRESHOLDS = {
 const metadata = {
 	tag: "ui5-wizard",
 	managedSlots: true,
+	fastNavigation: true,
 	properties: /** @lends sap.ui.webcomponents.fiori.Wizard.prototype */ {
 		/**
 		 * Defines the width of the <code>ui5-wizard</code>.