feat(ui5-input/ui5-multi-input): provide built-in filtering

packages/main/cypress/specs/Input.cy.tsx

@@ -556,21 +556,21 @@ describe("Input general interaction", () => {
 
 		cy.document().then(doc => {
 			const input = doc.querySelector<Input>("#threshold-input")!;
-			
+
 			input.addEventListener("input", () => {
 				const value = input.value;
-				
+
 				while (input.lastChild) {
 					input.removeChild(input.lastChild);
 				}
-				
+
 				if (value.length >= THRESHOLD) {
 					input.showSuggestions = true;
-					
-					const filtered = countries.filter(country => 
+
+					const filtered = countries.filter(country =>
 						country.toUpperCase().indexOf(value.toUpperCase()) === 0
 					);
-					
+
 					filtered.forEach(country => {
 						const item = document.createElement("ui5-suggestion-item");
 						item.setAttribute("text", country);
@@ -3094,3 +3094,166 @@ describe("Validation inside a form", () => {
 			.should("have.been.calledOnce");
 	});
 });
+
+describe("Input built-in filtering", () => {
+	it("StartsWith filtering", () => {
+		cy.mount(
+			<Input showSuggestions filter="StartsWith" noTypeahead>
+				<SuggestionItem text="Iron"></SuggestionItem>
+				<SuggestionItem text="Gold"></SuggestionItem>
+			</Input>
+		);
+		cy.get("[ui5-input]")
+			.as("input")
+			.shadow()
+			.find("input")
+			.realClick()
+			.realType("I");
+
+		cy.get("@input")
+			.shadow()
+			.find<ResponsivePopover>("[ui5-responsive-popover]")
+			.as("popover")
+			.ui5ResponsivePopoverOpened();
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(0)
+			.should("be.visible");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(1)
+			.should("have.attr", "hidden");
+
+		cy.get("@input")
+			.shadow()
+			.find("input")
+			.realClick()
+			.realPress("Backspace");
+
+		cy.get<ResponsivePopover>("@popover")
+			.ui5ResponsivePopoverClosed();
+
+		cy.get("@input")
+			.shadow()
+			.find("input")
+			.realType("G");
+
+		cy.get<ResponsivePopover>("@popover")
+			.ui5ResponsivePopoverOpened();
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(0)
+			.should("have.attr", "hidden");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(1)
+			.should("be.visible");
+	});
+	it("Contains filtering", () => {
+		cy.mount(
+			<Input showSuggestions filter="Contains" noTypeahead>
+				<SuggestionItem text="Iron"></SuggestionItem>
+				<SuggestionItem text="Gold"></SuggestionItem>
+			</Input>
+		);
+		cy.get("[ui5-input]")
+			.as("input")
+			.shadow()
+			.find("input")
+			.realClick()
+			.realType("o");
+
+		cy.get("@input")
+			.shadow()
+			.find<ResponsivePopover>("[ui5-responsive-popover]")
+			.as("popover")
+			.ui5ResponsivePopoverOpened();
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(0)
+			.should("be.visible");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(1)
+			.should("be.visible");
+
+		cy.get("@input")
+			.shadow()
+			.find("input")
+			.realClick()
+			.realPress("Backspace");
+
+		cy.get<ResponsivePopover>("@popover")
+			.ui5ResponsivePopoverClosed();
+
+		cy.get("@input")
+			.shadow()
+			.find("input")
+			.realType("l");
+
+		cy.get<ResponsivePopover>("@popover")
+			.ui5ResponsivePopoverOpened();
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(0)
+			.should("have.attr", "hidden");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item]")
+			.eq(1)
+			.should("be.visible");
+	});
+	it("hides suggestion group when it has no matching items", () => {
+		cy.mount(
+			<Input showSuggestions filter="Contains" noTypeahead>
+				<SuggestionItemGroup headerText="Metals">
+					<SuggestionItem text="Iron"></SuggestionItem>
+					<SuggestionItem text="Gold"></SuggestionItem>
+				</SuggestionItemGroup>
+				<SuggestionItemGroup headerText="Fruits">
+					<SuggestionItem text="Apple"></SuggestionItem>
+					<SuggestionItem text="Orange"></SuggestionItem>
+				</SuggestionItemGroup>
+			</Input>
+		);
+		cy.get("[ui5-input]")
+			.as("input")
+			.shadow()
+			.find("input")
+			.realClick()
+			.realType("o");
+
+		cy.get("@input")
+			.shadow()
+			.find<ResponsivePopover>("[ui5-responsive-popover]")
+			.as("popover")
+			.ui5ResponsivePopoverOpened();
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item-group]")
+			.eq(0)
+			.should("be.visible");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item-group]")
+			.eq(1)
+			.should("be.visible");
+
+		cy.get("@input")
+			.shadow()
+			.find("input")
+			.realType("l");
+
+		cy.get("@input")
+			.find("[ui5-suggestion-item-group]")
+			.eq(1)
+			.should("have.attr", "hidden");
+	});
+});

packages/main/src/Input.ts

@@ -65,7 +65,7 @@ import type { IIcon } from "./Icon.js";
 
 // Templates
 import InputTemplate from "./InputTemplate.js";
-import { StartsWith } from "./Filters.js";
+import * as Filters from "./Filters.js";
 
 import {
 	VALUE_STATE_SUCCESS,
@@ -100,6 +100,7 @@ import type { ListItemClickEventDetail, ListSelectionChangeEventDetail } from ".
 import type ResponsivePopover from "./ResponsivePopover.js";
 import type InputKeyHint from "./types/InputKeyHint.js";
 import type InputComposition from "./features/InputComposition.js";
+import InputSuggestionsFilter from "./types/InputSuggestionsFilter.js";
 
 /**
  * Interface for components that represent a suggestion item, usable in `ui5-input`
@@ -492,6 +493,14 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 	@property({ type: Boolean })
 	open = false;
 
+	/**
+	 * Defines the filter type of the component.
+	 * @default "None"
+	 * @public
+	 */
+	@property()
+	filter: `${InputSuggestionsFilter}` = InputSuggestionsFilter.None;
+
 	/**
 	 * Defines whether the clear icon is visible.
 	 * @default false
@@ -787,6 +796,10 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 			return;
 		}
 
+		if (this.filter !== InputSuggestionsFilter.None) {
+			this._filterItems(this.typedInValue);
+		}
+
 		const autoCompletedChars = innerInput.selectionEnd! - innerInput.selectionStart!;
 
 		// Typehead causes issues on Android devices, so we disable it for now
@@ -820,7 +833,13 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 			}
 
 			if (this.typedInValue.length && this.value.length) {
-				innerInput.setSelectionRange(this.typedInValue.length, this.value.length);
+				// "Contains" filtering requires custom selection range handling.
+				// Example: "e" → "Belgium" (item does not start with typed value, so select all).
+				if (this.filter === InputSuggestionsFilter.Contains) {
+					this._adjustContainsSelectionRange();
+				} else {
+					innerInput.setSelectionRange(this.typedInValue.length, this.value.length);
+				}
 			}
 
 			this.fireDecoratorEvent("type-ahead");
@@ -835,6 +854,22 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 		}
 	}
 
+	_adjustContainsSelectionRange() {
+		const innerInput = this.getInputDOMRefSync()!;
+		const visibleItems = this.Suggestions?._getItems().filter(item => !item.hidden) as IInputSuggestionItemSelectable[];
+		const currentItem = visibleItems?.find(item => { return item.selected || item.focused; });
+		const groupItems = this._flattenItems.filter(item => this._isGroupItem(item));
+
+		if (currentItem && !groupItems.includes(currentItem)) {
+			const doesItemStartWithTypedValue = currentItem?.text?.toLowerCase().startsWith(this.typedInValue.toLowerCase());
+			if (doesItemStartWithTypedValue) {
+				innerInput.setSelectionRange(this.typedInValue.length, this.value.length);
+			} else {
+				innerInput.setSelectionRange(0, this.value.length);
+			}
+		}
+	}
+
 	_onkeydown(e: KeyboardEvent) {
 		this._isKeyNavigation = true;
 		this._shouldAutocomplete = !this.noTypeahead && !(isBackSpace(e) || isDelete(e) || isEscape(e));
@@ -911,8 +946,9 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 
 	get currentItemIndex() {
 		const allItems = this.Suggestions?._getItems() as IInputSuggestionItemSelectable[];
-		const currentItem = allItems.find(item => { return item.selected || item.focused; });
-		const indexOfCurrentItem = currentItem ? allItems.indexOf(currentItem) : -1;
+		const visibleItems = allItems.filter(item => !item.hidden);
+		const currentItem = visibleItems.find(item => { return item.selected || item.focused; });
+		const indexOfCurrentItem = currentItem ? visibleItems.indexOf(currentItem) : -1;
 		return indexOfCurrentItem;
 	}
 
@@ -1310,11 +1346,15 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 			this.Suggestions.updateSelectedItemPosition(-1);
 		}
 
+		if (this.filter && (e.target as HTMLInputElement).value === "") {
+			this.open = false;
+		}
+
 		this.isTyping = true;
 	}
 
 	_startsWithMatchingItems(str: string): Array<IInputSuggestionItemSelectable> {
-		return StartsWith(str, this._selectableItems, "text");
+		return Filters.StartsWith(str, this._selectableItems, "text");
 	}
 
 	_getFirstMatchingItem(current: string): IInputSuggestionItemSelectable | undefined {
@@ -1337,6 +1377,52 @@ class Input extends UI5Element implements SuggestionComponent, IFormInputElement
 		item.selected = true;
 	}
 
+	_filterItems(value: string) {
+		let matchingItems: Array<IInputSuggestionItem> = [];
+		const groupItems = this._flattenItems.filter(item => this._isGroupItem(item));
+
+		this._resetItemVisibility();
+
+		if (groupItems.length) {
+			matchingItems = this._filterGroups(this.filter, groupItems);
+		} else {
+			matchingItems = (Filters[this.filter])(value, this._selectableItems, "text");
+		}
+		this._selectableItems.forEach(item => {
+			item.hidden = !matchingItems.includes(item);
+		});
+
+		if (matchingItems.length === 0) {
+			this.open = false;
+		}
+	}
+
+	_filterGroups(filterType: `${InputSuggestionsFilter}`, groupItems: IInputSuggestionItem[]) {
+		const filteredGroupItems: IInputSuggestionItem[] = [];
+		groupItems.forEach(groupItem => {
+			const currentGroupItems = (Filters[filterType])(this.typedInValue, groupItem.items ?? [], "text");
+			filteredGroupItems.push(...currentGroupItems);
+			if (currentGroupItems.length === 0) {
+				groupItem.hidden = true;
+			} else {
+				groupItem.hidden = false;
+			}
+		});
+		return filteredGroupItems;
+	}
+
+	_resetItemVisibility() {
+		this._flattenItems.forEach(item => {
+			if (this._isGroupItem(item)) {
+				item.items?.forEach(i => {
+					i.hidden = false;
+				});
+				return;
+			}
+			item.hidden = false;
+		});
+	}
+
 	_handleTypeAhead(item: IInputSuggestionItemSelectable) {
 		const value = item.text ? item.text : "";