refactor(ui5-popover): Keep popup open if focus is inside (#1937)

Another PR to address the "QuickCardView" topic. The change keeps the Popover open, without an opener, if the focus is inside that popover.

add prevent-focus-restore protected property in addition to the preventFocusRestore param of Popup.prototype.close method, because the quickCardView might close due to user interaction - click, TAB, ESC.
remove the recently added _closeWithOpener param, as now the popover without an opener would remain open if the focus is inside it and will be closed otherwise.
QuickCardView Interaction (test it on http://localhost:8080/test-resources/pages/Input_quickview.html)

Once opened, both Suggestions Popover and QuickCardView will close if:
neither the SearchField nor the QuickCardView has the focus, because the user clicks somewhere outside or
the user uses the TAB | SHIFT + TAB and the focus is somewhere else

Once opened, the QuickCardView remains open and Suggestions Popover closes if:
the focus moves to the QuickCardView, because the Popover.prototype.applyFocus method is called,
the user clicks inside the QuickCardView or the user uses the TAB | SHIFT + TAB key and the focus is goes inside the QuickCardView

Closes: #1768

Author: ilhan007

packages/main/src/Input.js

@@ -628,7 +628,7 @@ class Input extends UI5Element {
 		}
 
 		if (this.popover) {
-			this.popover.close(false, false, true);
+			this.popover.close();
 		}
 
 		this.previousValue = "";
@@ -894,13 +894,19 @@ class Input extends UI5Element {
 	onItemMouseOver(event) {
 		const item = event.target;
 		const suggestion = this.getSuggestionByListItem(item);
-		suggestion && suggestion.fireEvent("mouseover", { targetRef: item });
+		suggestion && suggestion.fireEvent("mouseover", {
+			item: suggestion,
+			targetRef: item,
+		});
 	}
 
 	onItemMouseOut(event) {
 		const item = event.target;
 		const suggestion = this.getSuggestionByListItem(item);
-		suggestion && suggestion.fireEvent("mouseout", { targetRef: item });
+		suggestion && suggestion.fireEvent("mouseout", {
+			item: suggestion,
+			targetRef: item,
+		});
 	}
 
 	onItemSelected(item, keyboardUsed) {

packages/main/src/InputPopover.hbs

@@ -65,6 +65,7 @@
 		<ui5-popover
 			skip-registry-update
 			_disable-initial-focus
+			prevent-focus-restore
 			no-padding
 			no-arrow
 			class="ui5-valuestatemessage-popover"

packages/main/src/Popover.js

@@ -253,16 +253,14 @@ class Popover extends Popup {
 	 * Opens the popover.
 	 * @param {HTMLElement} opener the element that the popover is opened by
 	 * @param {boolean} preventInitialFocus prevents applying the focus inside the popover
-	 * @param {boolean} closeWithOpener defines if the popover would closes when its opener is no longer visible (true by default)
 	 * @public
 	 */
-	openBy(opener, preventInitialFocus = false, closeWithOpener = true) {
+	openBy(opener, preventInitialFocus = false) {
 		if (!opener || this.opened) {
 			return;
 		}
 
 		this._opener = opener;
-		this._closeWithOpener = closeWithOpener;
 
 		super.open(preventInitialFocus);
 	}
@@ -321,8 +319,9 @@ class Popover extends Popup {
 		const popoverSize = this.popoverSize;
 		const openerRect = this._opener.getBoundingClientRect();
 
-		if (!this._closeWithOpener && this.shouldCloseDueToNoOpener(openerRect)) {
-			// use the old placement when the opener is gone
+		if (this.shouldCloseDueToNoOpener(openerRect) && this.isFocusWithin()) {
+			// reuse the old placement as the opener is not available,
+			// but keep the popover open as the focus is within
 			placement = this._oldPlacement;
 		} else {
 			placement = this.calcPlacement(openerRect, popoverSize);
@@ -407,11 +406,7 @@ class Popover extends Popup {
 
 		const placementType = this.getActualPlacementType(targetRect, popoverSize);
 
-		if (!this._closeWithOpener) {
-			this._preventRepositionAndClose = this.shouldCloseDueToNoOpener(targetRect) || this.shouldCloseDueToOverflow(placementType, targetRect);
-		} else {
-			this._preventRepositionAndClose = false;
-		}
+		this._preventRepositionAndClose = this.shouldCloseDueToNoOpener(targetRect) || this.shouldCloseDueToOverflow(placementType, targetRect);
 
 		const isVertical = placementType === PopoverPlacementType.Top
 			|| placementType === PopoverPlacementType.Bottom;

packages/main/src/Popup.js

@@ -4,7 +4,7 @@ import { getFirstFocusableElement, getLastFocusableElement } from "@ui5/webcompo
 import createStyleInHead from "@ui5/webcomponents-base/dist/util/createStyleInHead.js";
 import PopupTemplate from "./generated/templates/PopupTemplate.lit.js";
 import PopupBlockLayer from "./generated/templates/PopupBlockLayerTemplate.lit.js";
-import { getNextZIndex, getFocusedElement } from "./popup-utils/PopupUtils.js";
+import { getNextZIndex, getFocusedElement, isFocusedElementWithinNode } from "./popup-utils/PopupUtils.js";
 import { addOpenedPopup, removeOpenedPopup } from "./popup-utils/OpenedPopupsRegistry.js";
 
 // Styles
@@ -40,9 +40,23 @@ const metadata = {
 			type: String,
 		},
 
+		/**
+		 * Defines if the focus should be returned to the previously focused element,
+		 * when the popup closes.
+		 * @type {boolean}
+		 * @defaultvalue false
+		 * @public
+		 * @since 1.0.0-rc.8
+		*/
+		preventFocusRestore: {
+			type: Boolean,
+		},
+
 		/**
 		 * Indicates if the elements is open
 		 * @private
+		 * @type {boolean}
+		 * @defaultvalue false
 		 */
 		opened: {
 			type: Boolean,
@@ -273,6 +287,10 @@ class Popup extends UI5Element {
 		return this.opened;
 	}
 
+	isFocusWithin() {
+		return isFocusedElementWithinNode(this.shadowRoot.querySelector(".ui5-popup-root"));
+	}
+
 	/**
 	 * Shows the block layer (for modal popups only) and sets the correct z-index for the purpose of popup stacking
 	 * @param {boolean} preventInitialFocus prevents applying the focus inside the popup
@@ -333,7 +351,7 @@ class Popup extends UI5Element {
 			this._removeOpenedPopup();
 		}
 
-		if (!preventFocusRestore) {
+		if (!this.preventFocusRestore && !preventFocusRestore) {
 			this.resetFocus();
 		}
 

packages/main/src/TextArea.js

@@ -447,7 +447,7 @@ class TextArea extends UI5Element {
 
 	async closePopover() {
 		this.popover = await this._getPopover();
-		this.popover && this.popover.close(false, false, true);
+		this.popover && this.popover.close();
 	}
 
 	async _getPopover() {

packages/main/src/TextAreaPopover.hbs

@@ -1,6 +1,7 @@
 {{#if displayValueStateMessagePopover}}
 	<ui5-popover
 		skip-registry-update
+		prevent-focus-restore
 		no-padding
 		no-arrow
 		_disable-initial-focus

packages/main/src/popup-utils/OpenedPopupsRegistry.js

@@ -30,6 +30,10 @@ const getOpenedPopups = () => {
 };
 
 const _keydownListener = event => {
+	if (!openedRegistry.length) {
+		return;
+	}
+
 	if (isEscape(event)) {
 		openedRegistry.pop().instance.close(true);
 	}

packages/main/src/popup-utils/PopupUtils.js

@@ -10,6 +10,34 @@ const getFocusedElement = () => {
 	return (element && typeof element.focus === "function") ? element : null;
 };
 
+const isFocusedElementWithinNode = node => {
+	const fe = getFocusedElement();
+
+	if (fe) {
+		return isNodeContainedWithin(node, fe);
+	}
+
+	return false;
+};
+
+const isNodeContainedWithin = (parent, child) => {
+	let currentNode = parent;
+
+	if (currentNode.shadowRoot) {
+		currentNode = Array.from(currentNode.shadowRoot.children).find(n => n.localName !== "style");
+	}
+
+	if (currentNode === child) {
+		return true;
+	}
+
+	const childNodes = currentNode.localName === "slot" ? currentNode.assignedNodes() : currentNode.children;
+
+	if (childNodes) {
+		return Array.from(childNodes).some(n => isNodeContainedWithin(n, child));
+	}
+};
+
 const isPointInRect = (x, y, rect) => {
 	return x >= rect.left && x <= rect.right
 		&& y >= rect.top && y <= rect.bottom;
@@ -52,4 +80,5 @@ export {
 	isClickInRect,
 	getClosedPopupParent,
 	getNextZIndex,
+	isFocusedElementWithinNode,
 };

packages/main/test/pages/Input.html

@@ -422,7 +422,7 @@ <h3>Test ariaLabel and ariaLabelledBy</h3>
 		inputPreview.addEventListener("ui5-suggestion-item-preview", function (event) {
 			var item = event.detail.targetRef;
 			quickViewCard.close();
-			quickViewCard.openBy(item, true /* preventInitialFocus */, false /* closeWithOpener */);
+			quickViewCard.openBy(item, true /* preventInitialFocus */);
 
 			// log info
 			inputItemPreviewRes.value = item.textContent;
@@ -449,36 +449,28 @@ <h3>Test ariaLabel and ariaLabelledBy</h3>
 			el.addEventListener("mouseover", function (event) {
 				const targetRef = event.detail.targetRef;
 				quickViewCard.close();
-				quickViewCard.openBy(targetRef, true /* preventInitialFocus */, false /* closeWithOpener */);
+				quickViewCard.openBy(targetRef, true /* preventInitialFocus */);
 
 				// log info
 				mouseoverResult.value = targetRef.textContent;
 				console.log("mouseover");
 			});
 
 			el.addEventListener("mouseout", function (event) {
-				// if (!focusQuickView) {
-				// 	quickViewCard.close(false, false, true);
-				// }
-
-				// focusQuickView = false;
-
-				// // log info
-				// mouseoutResult.value = event.detail.targetRef.textContent;
-				// console.log("mouseout");
 			});
 		});
 
 		inputPreview.addEventListener("ui5-suggestion-scroll", function (event) {
 			console.log("scroll", { scrolltop: event.detail.scrollTop });
 		});
 
-		inputPreview.addEventListener("focusin", function (event) {
-			console.log("focusin");
-		});
+		quickViewCard.addEventListener("ui5-before-close", async event => {
+			const esc = event.detail.escPressed;
 
-		inputPreview.addEventListener("focusout", function (event) {
-			console.log("focusout");
+			if (esc) {
+				await RenderScheduler.whenFinished();
+				inputPreview.focus();
+			}
 		});
 
 		scrollInput.addEventListener("ui5-suggestion-scroll", function (event) {

packages/main/test/pages/Input_quickview.html

@@ -18,15 +18,23 @@ <h1> Quick View sample</h1>
 		<li>navigate via the arrows to see quick view</li>
 		<li>press [ctrl + shift + 1] to enter the quick view</li>
 	</ul>
-	<ui5-input id="inputPreview" show-suggestions style="width: 200px; margin-top: 50px">
+
+	<div style="display: flex; align-items: center">
+		<ui5-label>focusable element: </ui5-label><ui5-button>before</ui5-button>
+	</div>
+	<br>
+	<br>
+
+	<ui5-input id="inputPreview" show-suggestions style="width: 200px;">
 		<ui5-suggestion-item class="suggestionItem" text="Laptop Lenovo"></ui5-suggestion-item>
 		<ui5-suggestion-item class="suggestionItem" text="HP Monitor 24"></ui5-suggestion-item>
 		<ui5-suggestion-item class="suggestionItem" text="IPhone 6s"></ui5-suggestion-item>
 		<ui5-suggestion-item class="suggestionItem" text="Dell"></ui5-suggestion-item>
 		<ui5-suggestion-item class="suggestionItem" text="IPad Air"></ui5-suggestion-item>
 	</ui5-input>
 
-	<ui5-popover id="quickViewCard" no-arrow placement-type="Right" height="500px">
+	<ui5-popover id="quickViewCard" no-arrow placement-type="Right" height="500px" prevent-focus-restore>
+		<button>hello</button>
 		<ui5-input id="searchInput" style="width: 300px">
 			<ui5-icon id="searchIcon" slot="icon" name="search"></ui5-icon>
 		</ui5-input>
@@ -42,23 +50,43 @@ <h1> Quick View sample</h1>
 		</ui5-list>
 	</ui5-popover>
 
+	<br>
+	<br>
+	<div style="display: flex; align-items: center">
+		<ui5-label>focusable element: </ui5-label><ui5-button>after</ui5-button>
+	</div>
 	<script>
 		var focusQuickView = false;
 
 		/* 
-		 * Open quick view on suggestion-item-preview
+		 * Open quickviewCard on suggestion-item-preview
 		 */
 		inputPreview.addEventListener("suggestion-item-preview", function (event) {
 			const targetRef = event.detail.targetRef;
 
 			quickViewCard.close();
-			quickViewCard.openBy(targetRef, true /* preventInitialFocus */, false /* closeWithOpener */); 
+			quickViewCard.openBy(targetRef, true /* preventInitialFocus */); 
+		});
+
+		/* 
+		 * Toggle quickviewCard on mouseover/mouseout
+		 */
+		 [].slice.call(document.querySelectorAll(".suggestionItem")).forEach(function(el) {
+			el.addEventListener("mouseover", function (event) {
+				const targetRef = event.detail.targetRef;
+
+				quickViewCard.close();
+				quickViewCard.openBy(targetRef, true /* preventInitialFocus */);
+			});
+
+			el.addEventListener("mouseout", function (event) {
+			});
 		});
 
 		/* 
-		 * Focus quick view on [ctrl + shift + 1]
+		 * Focus quickviewCard on [ctrl + shift + 1]
 		 */
-		inputPreview.addEventListener("keyup", async function (event) {
+		inputPreview.addEventListener("keyup", async event => {
 			const combination = event.key === "1" && event.ctrlKey && event.shiftKey;
 
 			if (combination) {
@@ -69,23 +97,15 @@ <h1> Quick View sample</h1>
 		});
 
 		/* 
-		 * Toggle quick view on mouseover/mouseout
+		 * Restore the focus to the input on ESC
 		 */
-		[].slice.call(document.querySelectorAll(".suggestionItem")).forEach(function(el) {
-			el.addEventListener("mouseover", function (event) {
-				const targetRef = event.detail.targetRef;
-
-				quickViewCard.close();
-				quickViewCard.openBy(targetRef, true /* preventInitialFocus */, false /* closeWithOpener */);
-			});
-
-			el.addEventListener("mouseout", function (event) {
-				// if (!focusQuickView) {
-				// 	quickViewCard.close(false, false, true);
-				// }
+		quickViewCard.addEventListener("before-close", async event => {
+			const esc = event.detail.escPressed;
 
-				// focusQuickView = false;
-			});
+			if (esc) {
+				await RenderScheduler.whenFinished();
+				inputPreview.focus();
+			}
 		});
 	</script>
 </body>