@nova-ui/bits
Version:
SolarWinds Nova Framework
138 lines • 20 kB
JavaScript
// © 2022 SolarWinds Worldwide, LLC. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import { ActiveDescendantKeyManager, LiveAnnouncer } from "@angular/cdk/a11y";
import { Injectable } from "@angular/core";
import isNil from "lodash/isNil";
import { ANNOUNCER_CLOSE_MESSAGE, ANNOUNCER_OPEN_MESSAGE_SUFFIX, } from "./constants";
import { KEYBOARD_CODE } from "../../constants/keycode.constants";
import * as i0 from "@angular/core";
import * as i1 from "@angular/cdk/a11y";
export class OptionKeyControlService {
constructor(liveAnnouncer) {
this.liveAnnouncer = liveAnnouncer;
}
initKeyboardManager() {
this.keyboardEventsManager = new ActiveDescendantKeyManager(this.optionItems).withVerticalOrientation();
}
handleKeydown(event) {
this.popup.showing
? this.handleOpenKeyDown(event)
: this.handleClosedKeyDown(event);
}
setActiveItem(option) {
this.keyboardEventsManager?.setActiveItem(option);
}
resetActiveItem() {
this.keyboardEventsManager.setActiveItem(-1);
}
setFirstItemActive() {
this.keyboardEventsManager?.setFirstItemActive();
}
getActiveItemIndex() {
return this.keyboardEventsManager.activeItemIndex;
}
setSkipPredicate(predicate) {
this.keyboardEventsManager.skipPredicate(predicate);
}
scrollToActiveItem(options) {
if (this.keyboardEventsManager.activeItem) {
// setTimeout is necessary because scrolling to the selected item should occur only when overlay rendered
setTimeout(() => {
this.keyboardEventsManager.activeItem?.scrollIntoView(options);
});
}
}
hasActiveItem() {
if (isNil(this.keyboardEventsManager.activeItemIndex)) {
throw new Error("ActiveItemIndex is not defined");
}
return Boolean(this.keyboardEventsManager.activeItem &&
this.keyboardEventsManager.activeItemIndex >= 0);
}
handleOpenKeyDown(event) {
switch (event.code) {
case KEYBOARD_CODE.ARROW_DOWN:
case KEYBOARD_CODE.ARROW_UP:
this.keyboardEventsManager.onKeydown(event);
this.announceNavigatedOption();
break;
case KEYBOARD_CODE.PAGE_UP:
event.preventDefault();
this.keyboardEventsManager.onKeydown(event);
this.keyboardEventsManager.setFirstItemActive();
break;
case KEYBOARD_CODE.PAGE_DOWN:
event.preventDefault();
this.keyboardEventsManager.onKeydown(event);
this.keyboardEventsManager.setLastItemActive();
break;
}
this.scrollToActiveItem({ block: "nearest" });
// prevent closing on enter
if (!this.hasActiveItem() && event.code === KEYBOARD_CODE.ENTER) {
event.preventDefault();
}
if (this.hasActiveItem() && event.code === KEYBOARD_CODE.ENTER) {
if (!this.keyboardEventsManager.activeItem) {
throw new Error("ActiveItem is not defined");
}
// perform action in menu item(select, switch, check etc).
this.keyboardEventsManager.activeItem.element.nativeElement.click();
}
if (event.code === KEYBOARD_CODE.TAB ||
event.code === KEYBOARD_CODE.ESCAPE) {
this.popup.toggle();
this.announceDropdown(this.popup.showing);
}
}
handleClosedKeyDown(event) {
// prevent opening on enter and prevent scrolling page on key down/key up when focused
if (this.shouldBePrevented(event)) {
event.preventDefault();
}
if (event.code === KEYBOARD_CODE.ARROW_DOWN) {
this.popup.toggle();
this.scrollToActiveItem({ block: "center" });
}
}
shouldBePrevented(event) {
return (event.code === KEYBOARD_CODE.ARROW_DOWN ||
event.code === KEYBOARD_CODE.ARROW_UP ||
event.code === KEYBOARD_CODE.ENTER);
}
announceNavigatedOption() {
const activeItem = this.keyboardEventsManager.activeItem;
if (activeItem) {
this.liveAnnouncer.announce(activeItem.value);
}
}
announceDropdown(open) {
const message = open
? `${this.optionItems.length} ${ANNOUNCER_OPEN_MESSAGE_SUFFIX}`
: ANNOUNCER_CLOSE_MESSAGE;
this.liveAnnouncer.announce(message);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: OptionKeyControlService, deps: [{ token: i1.LiveAnnouncer }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: OptionKeyControlService }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: OptionKeyControlService, decorators: [{
type: Injectable
}], ctorParameters: () => [{ type: i1.LiveAnnouncer }] });
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All rights reserved.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a copy\n//  of this software and associated documentation files (the \"Software\"), to\n//  deal in the Software without restriction, including without limitation the\n//  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n//  sell copies of the Software, and to permit persons to whom the Software is\n//  furnished to do so, subject to the following conditions:\n//\n// The above copyright notice and this permission notice shall be included in\n//  all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n//  THE SOFTWARE.\n\nimport { ActiveDescendantKeyManager, LiveAnnouncer } from \"@angular/cdk/a11y\";\nimport { Injectable, QueryList } from \"@angular/core\";\nimport isNil from \"lodash/isNil\";\n\nimport {\n    ANNOUNCER_CLOSE_MESSAGE,\n    ANNOUNCER_OPEN_MESSAGE_SUFFIX,\n} from \"./constants\";\nimport { KEYBOARD_CODE } from \"../../constants/keycode.constants\";\nimport { IOption, IOverlayComponent } from \"../overlay/types\";\n\n@Injectable()\nexport class OptionKeyControlService<T extends IOption> {\n    public popup: IOverlayComponent;\n    public optionItems: QueryList<T>;\n\n    private keyboardEventsManager: ActiveDescendantKeyManager<T>;\n\n    constructor(public liveAnnouncer: LiveAnnouncer) {}\n\n    public initKeyboardManager(): void {\n        this.keyboardEventsManager = new ActiveDescendantKeyManager(\n            this.optionItems\n        ).withVerticalOrientation();\n    }\n\n    public handleKeydown(event: KeyboardEvent): void {\n        this.popup.showing\n            ? this.handleOpenKeyDown(event)\n            : this.handleClosedKeyDown(event);\n    }\n\n    public setActiveItem(option: T): void {\n        this.keyboardEventsManager?.setActiveItem(option);\n    }\n\n    public resetActiveItem(): void {\n        this.keyboardEventsManager.setActiveItem(-1);\n    }\n\n    public setFirstItemActive(): void {\n        this.keyboardEventsManager?.setFirstItemActive();\n    }\n\n    public getActiveItemIndex(): number | null {\n        return this.keyboardEventsManager.activeItemIndex;\n    }\n\n    public setSkipPredicate(predicate: (option: T) => boolean): void {\n        this.keyboardEventsManager.skipPredicate(predicate);\n    }\n\n    public scrollToActiveItem(options: ScrollIntoViewOptions): void {\n        if (this.keyboardEventsManager.activeItem) {\n            // setTimeout is necessary because scrolling to the selected item should occur only when overlay rendered\n            setTimeout(() => {\n                this.keyboardEventsManager.activeItem?.scrollIntoView(options);\n            });\n        }\n    }\n\n    private hasActiveItem(): boolean {\n        if (isNil(this.keyboardEventsManager.activeItemIndex)) {\n            throw new Error(\"ActiveItemIndex is not defined\");\n        }\n        return Boolean(\n            this.keyboardEventsManager.activeItem &&\n                this.keyboardEventsManager.activeItemIndex >= 0\n        );\n    }\n\n    private handleOpenKeyDown(event: KeyboardEvent): void {\n        switch (event.code) {\n            case KEYBOARD_CODE.ARROW_DOWN:\n            case KEYBOARD_CODE.ARROW_UP:\n                this.keyboardEventsManager.onKeydown(event);\n                this.announceNavigatedOption();\n                break;\n            case KEYBOARD_CODE.PAGE_UP:\n                event.preventDefault();\n                this.keyboardEventsManager.onKeydown(event);\n                this.keyboardEventsManager.setFirstItemActive();\n                break;\n            case KEYBOARD_CODE.PAGE_DOWN:\n                event.preventDefault();\n                this.keyboardEventsManager.onKeydown(event);\n                this.keyboardEventsManager.setLastItemActive();\n                break;\n        }\n\n        this.scrollToActiveItem({ block: \"nearest\" });\n\n        // prevent closing on enter\n        if (!this.hasActiveItem() && event.code === KEYBOARD_CODE.ENTER) {\n            event.preventDefault();\n        }\n\n        if (this.hasActiveItem() && event.code === KEYBOARD_CODE.ENTER) {\n            if (!this.keyboardEventsManager.activeItem) {\n                throw new Error(\"ActiveItem is not defined\");\n            }\n\n            // perform action in menu item(select, switch, check etc).\n            this.keyboardEventsManager.activeItem.element.nativeElement.click();\n        }\n\n        if (\n            event.code === KEYBOARD_CODE.TAB ||\n            event.code === KEYBOARD_CODE.ESCAPE\n        ) {\n            this.popup.toggle();\n            this.announceDropdown(this.popup.showing);\n        }\n    }\n\n    private handleClosedKeyDown(event: KeyboardEvent): void {\n        // prevent opening on enter and prevent scrolling page on key down/key up when focused\n        if (this.shouldBePrevented(event)) {\n            event.preventDefault();\n        }\n\n        if (event.code === KEYBOARD_CODE.ARROW_DOWN) {\n            this.popup.toggle();\n            this.scrollToActiveItem({ block: \"center\" });\n        }\n    }\n\n    private shouldBePrevented(event: KeyboardEvent) {\n        return (\n            event.code === KEYBOARD_CODE.ARROW_DOWN ||\n            event.code === KEYBOARD_CODE.ARROW_UP ||\n            event.code === KEYBOARD_CODE.ENTER\n        );\n    }\n\n    private announceNavigatedOption(): void {\n        const activeItem = this.keyboardEventsManager.activeItem;\n\n        if (activeItem) {\n            this.liveAnnouncer.announce((activeItem as any).value);\n        }\n    }\n\n    private announceDropdown(open: boolean) {\n        const message = open\n            ? `${this.optionItems.length} ${ANNOUNCER_OPEN_MESSAGE_SUFFIX}`\n            : ANNOUNCER_CLOSE_MESSAGE;\n\n        this.liveAnnouncer.announce(message);\n    }\n}\n"]}