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ng-keyboard-shortcuts

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Dead Simple Keyboard Shortcuts Management for Angular 2+

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import { ApplicationRef, Component, ComponentFactoryResolver, ElementRef, Injector, Input, TemplateRef, ViewChild, ViewContainerRef } from "@angular/core"; import { DomPortalOutlet } from "./dom-portal-outlet"; import { TemplatePortal } from "./portal"; import { KeyboardShortcutsService } from "./ng-keyboard-shortcuts.service"; import { KeyboardShortcutsHelpService } from "./ng-keyboard-shortcuts-help.service"; import { animate, style, transition, trigger } from "@angular/animations"; import { distinctUntilChanged, map } from "rxjs/operators"; import { groupBy } from "./utils"; import { BehaviorSubject } from "rxjs"; import * as i0 from "@angular/core"; import * as i1 from "./ng-keyboard-shortcuts.service"; import * as i2 from "./ng-keyboard-shortcuts-help.service"; import * as i3 from "./ng-keyboard-shortcuts-help-item.component"; import * as i4 from "@angular/common"; /** * @ignore */ const scrollAbleKeys = new Map([ [31, 1], [38, 1], [39, 1], [40, 1] ]); /** * @ignore */ const preventDefault = (ignore) => (e) => { const modal = e.target.closest(ignore); if (modal) { return; } e = e || window.event; if (e.preventDefault) { e.preventDefault(); } e.returnValue = false; }; /** * @ignore */ const preventDefaultForScrollKeys = (e) => { if (!scrollAbleKeys.has(e.keyCode)) { return true; } preventDefault(e); return false; }; /** * @ignore */ let scrollEvents = [ { name: "wheel", callback: null }, { name: "touchmove", callback: null }, { name: "DOMMouseScroll", callback: null } ]; /** * @ignore */ const disableScroll = (ignore) => { scrollEvents = scrollEvents.map((event) => { const callback = preventDefault(ignore); window.addEventListener(event.name, callback, { passive: false }); return { ...event, callback }; }); window.addEventListener("keydown", preventDefaultForScrollKeys); }; /** * @ignore */ const enableScroll = () => { scrollEvents = scrollEvents.map((event) => { window.removeEventListener(event.name, event.callback); return { ...event, callback: null }; }); window.removeEventListener("keydown", preventDefaultForScrollKeys); }; /** * A Component to show all registered shortcut in the app * it is shown as a modal */ export class KeyboardShortcutsHelpComponent { /** * @ignore */ constructor(componentFactoryResolver, appRef, keyboard, element, keyboardHelp, viewContainer, injector) { this.componentFactoryResolver = componentFactoryResolver; this.appRef = appRef; this.keyboard = keyboard; this.element = element; this.keyboardHelp = keyboardHelp; this.viewContainer = viewContainer; this.injector = injector; /** * Disable scrolling while modal is open */ this.disableScrolling = true; this.className = "help-modal"; /** * The title of the help screen * @default: "Keyboard shortcuts" */ this.title = "Keyboard shortcuts"; /** * What message to show when no shortcuts are available on the page. * @default "No shortcuts available" */ this.emptyMessage = "No shortcuts available"; /** * @ignore */ this.showing$ = new BehaviorSubject(false); this.bodyPortalHost = new DomPortalOutlet(document.body, this.componentFactoryResolver, this.appRef, this.injector); } /** * The shortcut to show/hide the help screen */ set key(value) { this._key = value; if (!value) { return; } if (this.clearIds) { this.keyboard.remove(this.clearIds); } this.clearIds = this.addShortcut({ key: value, preventDefault: true, command: () => this.toggle(), description: this.keyDescription, label: this.keyLabel }); } addShortcut(shortcut) { return this.keyboard.add(shortcut); } /** * Reveal the help screen manually. */ reveal() { this.hide(); if (this.disableScrolling) { disableScroll(`.${this.className}`); } const portal = new TemplatePortal(this.template, this.viewContainer); this.bodyPortalHost.attach(portal); this.showing$.next(true); return this; } /** * Check if help screen is visible. * @returns boolean */ visible() { return this.bodyPortalHost.hasAttached(); } /** * Hide the help screen manually. */ hide() { if (this.disableScrolling) { enableScroll(); } if (!this.bodyPortalHost.hasAttached()) { return this; } this.bodyPortalHost.detach(); this.showing$.next(false); return this; } /** * @ignore */ ngOnDestroy() { this.hide(); if (this.clearIds) { this.keyboard.remove(this.clearIds); } if (this.closeKeyIds) { this.keyboard.remove(this.closeKeyIds); } if (this.subscription) { this.subscription.unsubscribe(); } if (this.timeoutId) { clearTimeout(this.timeoutId); } } /** * Show/Hide the help screen manually. */ toggle() { this.visible() ? this.hide() : this.reveal(); return this; } /** * @ignore */ ngOnInit() { this.subscription = this.keyboardHelp.shortcuts$ .pipe(distinctUntilChanged(), map((shortcuts) => groupBy(shortcuts, "label"))) .subscribe((shortcuts) => { this.shortcuts = shortcuts; this.labels = Object.keys(shortcuts); }); } ngOnChanges(changes) { if (!changes["closeKey"].currentValue) { return; } if (this.closeKeyIds) { this.keyboard.remove(this.closeKeyIds); } this.closeKeyIds = this.addShortcut({ key: changes["closeKey"].currentValue, preventDefault: true, command: () => this.hide(), description: this.closeKeyDescription, label: this.closeKeyDescription }); } } KeyboardShortcutsHelpComponent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.3.7", ngImport: i0, type: KeyboardShortcutsHelpComponent, deps: [{ token: i0.ComponentFactoryResolver }, { token: i0.ApplicationRef }, { token: i1.KeyboardShortcutsService }, { token: i0.ElementRef }, { token: i2.KeyboardShortcutsHelpService }, { token: i0.ViewContainerRef }, { token: i0.Injector }], target: i0.ɵɵFactoryTarget.Component }); KeyboardShortcutsHelpComponent.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "13.3.7", type: KeyboardShortcutsHelpComponent, selector: "ng-keyboard-shortcuts-help", inputs: { disableScrolling: "disableScrolling", keyDescription: "keyDescription", keyLabel: "keyLabel", closeKeyLabel: "closeKeyLabel", closeKeyDescription: "closeKeyDescription", key: "key", closeKey: "closeKey", title: "title", emptyMessage: "emptyMessage" }, viewQueries: [{ propertyName: "template", first: true, predicate: TemplateRef, descendants: true }], usesOnChanges: true, ngImport: i0, template: "<ng-template>\n <div class=\"help-modal__container\" [attr.aria-labelledby]=\"'modal-' + title\" role=\"dialog\">\n <div class=\"{{className}}\" [@enterAnimation] *ngIf=\"showing$ | async\">\n <div class=\"title\">\n <h3 id=\"modal-{{title}}\" class=\"title__text\">{{title}}</h3>\n </div>\n <div class=\"help-modal__body\">\n <span *ngIf=\"!labels.length\">\n {{emptyMessage}}\n </span>\n <div>\n <ul *ngFor=\"let label of labels\" class=\"help-modal__list\">\n <h4 class=\"item-group-label\">{{label}}</h4>\n <ng-keyboard-shortcuts-help-item\n *ngFor=\"let shortcut of shortcuts[label]; let i = index\"\n [shortcut]=\"shortcut\"\n [index]=\"i\"\n ></ng-keyboard-shortcuts-help-item>\n </ul>\n </div>\n </div>\n </div>\n <div class=\"help-modal__backdrop\" [@overlayAnimation] (mousedown)=\"hide()\" *ngIf=\"showing$ | async\"></div>\n </div>\n</ng-template>\n", styles: [".help-modal__container{position:fixed;top:0;right:0;z-index:500;left:0;bottom:0;display:flex;align-items:center;justify-content:center}.help-modal{z-index:2000;min-width:420px;max-height:calc(100% - 100px);overflow:auto;padding:20px;box-shadow:0 11px 15px -7px #0003,0 24px 38px 3px #00000024,0 9px 46px 8px #0000001f;background:#fff}.item-group-label{text-transform:capitalize}.title{padding:20px 0}.title__text{margin:0;padding:0}.help-modal__list{padding:0}.help-modal__backdrop{position:absolute;background:rgba(0,0,0,.27);top:0;bottom:0;left:0;right:0;z-index:1000;pointer-events:auto;-webkit-tap-highlight-color:transparent;opacity:1}\n"], components: [{ type: i3.KeyboardShortcutsHelpItemComponent, selector: "ng-keyboard-shortcuts-help-item", inputs: ["index", "shortcut"] }], directives: [{ type: i4.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { type: i4.NgForOf, selector: "[ngFor][ngForOf]", inputs: ["ngForOf", "ngForTrackBy", "ngForTemplate"] }], pipes: { "async": i4.AsyncPipe }, animations: [ trigger("enterAnimation", [ transition(":enter", [ style({ transform: "translateX(-100%)", opacity: 0 }), animate("0.33s cubic-bezier(0,0,0.3,1)", style({ transform: "translateX(0)", opacity: 1 })) ]), transition(":leave", [ style({ transform: "translateX(0)", opacity: 1 }), animate("0.23s cubic-bezier(0,0,0.3,1)", style({ transform: "translateX(-100%)", opacity: 0 })) ]) ]), trigger("overlayAnimation", [ transition(":enter", [ style({ opacity: 0 }), animate("1s cubic-bezier(0,0,0.3,1)", style({ opacity: 1 })) ]), transition(":leave", [ style({ opacity: 1 }), animate("1s cubic-bezier(0,0,0.3,1)", style({ opacity: 0 })) ]) ]) ] }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.3.7", ngImport: i0, type: KeyboardShortcutsHelpComponent, decorators: [{ type: Component, args: [{ selector: "ng-keyboard-shortcuts-help", animations: [ trigger("enterAnimation", [ transition(":enter", [ style({ transform: "translateX(-100%)", opacity: 0 }), animate("0.33s cubic-bezier(0,0,0.3,1)", style({ transform: "translateX(0)", opacity: 1 })) ]), transition(":leave", [ style({ transform: "translateX(0)", opacity: 1 }), animate("0.23s cubic-bezier(0,0,0.3,1)", style({ transform: "translateX(-100%)", opacity: 0 })) ]) ]), trigger("overlayAnimation", [ transition(":enter", [ style({ opacity: 0 }), animate("1s cubic-bezier(0,0,0.3,1)", style({ opacity: 1 })) ]), transition(":leave", [ style({ opacity: 1 }), animate("1s cubic-bezier(0,0,0.3,1)", style({ opacity: 0 })) ]) ]) ], template: "<ng-template>\n <div class=\"help-modal__container\" [attr.aria-labelledby]=\"'modal-' + title\" role=\"dialog\">\n <div class=\"{{className}}\" [@enterAnimation] *ngIf=\"showing$ | async\">\n <div class=\"title\">\n <h3 id=\"modal-{{title}}\" class=\"title__text\">{{title}}</h3>\n </div>\n <div class=\"help-modal__body\">\n <span *ngIf=\"!labels.length\">\n {{emptyMessage}}\n </span>\n <div>\n <ul *ngFor=\"let label of labels\" class=\"help-modal__list\">\n <h4 class=\"item-group-label\">{{label}}</h4>\n <ng-keyboard-shortcuts-help-item\n *ngFor=\"let shortcut of shortcuts[label]; let i = index\"\n [shortcut]=\"shortcut\"\n [index]=\"i\"\n ></ng-keyboard-shortcuts-help-item>\n </ul>\n </div>\n </div>\n </div>\n <div class=\"help-modal__backdrop\" [@overlayAnimation] (mousedown)=\"hide()\" *ngIf=\"showing$ | async\"></div>\n </div>\n</ng-template>\n", styles: [".help-modal__container{position:fixed;top:0;right:0;z-index:500;left:0;bottom:0;display:flex;align-items:center;justify-content:center}.help-modal{z-index:2000;min-width:420px;max-height:calc(100% - 100px);overflow:auto;padding:20px;box-shadow:0 11px 15px -7px #0003,0 24px 38px 3px #00000024,0 9px 46px 8px #0000001f;background:#fff}.item-group-label{text-transform:capitalize}.title{padding:20px 0}.title__text{margin:0;padding:0}.help-modal__list{padding:0}.help-modal__backdrop{position:absolute;background:rgba(0,0,0,.27);top:0;bottom:0;left:0;right:0;z-index:1000;pointer-events:auto;-webkit-tap-highlight-color:transparent;opacity:1}\n"] }] }], ctorParameters: function () { return [{ type: i0.ComponentFactoryResolver }, { type: i0.ApplicationRef }, { type: i1.KeyboardShortcutsService }, { type: i0.ElementRef }, { type: i2.KeyboardShortcutsHelpService }, { type: i0.ViewContainerRef }, { type: i0.Injector }]; }, propDecorators: { disableScrolling: [{ type: Input }], keyDescription: [{ type: Input }], keyLabel: [{ type: Input }], closeKeyLabel: [{ type: Input }], closeKeyDescription: [{ type: Input }], key: [{ type: Input }], closeKey: [{ type: Input }], title: [{ type: Input }], emptyMessage: [{ type: Input }], template: [{ type: ViewChild, args: [TemplateRef] }] } }); //# 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preventDefaultForScrollKeys);\n};\n/**\n * @ignore\n */\nconst enableScroll = () => {\n    scrollEvents = scrollEvents.map((event) => {\n        window.removeEventListener(event.name, event.callback);\n        return {\n            ...event,\n            callback: null\n        };\n    });\n    window.removeEventListener(\"keydown\", preventDefaultForScrollKeys);\n};\n\n/**\n * A Component to show all registered shortcut in the app\n * it is shown as a modal\n */\n@Component({\n    selector: \"ng-keyboard-shortcuts-help\",\n    templateUrl: \"./ng-keyboard-shortcuts-help.component.html\",\n    styleUrls: [\"./ng-keyboard-shortcuts-help.component.scss\"],\n    animations: [\n        trigger(\"enterAnimation\", [\n            transition(\":enter\", [\n                style({ transform: \"translateX(-100%)\", opacity: 0 }),\n                animate(\n                    \"0.33s cubic-bezier(0,0,0.3,1)\",\n                    style({ transform: \"translateX(0)\", opacity: 1 })\n                )\n            ]),\n            transition(\":leave\", [\n                style({ transform: \"translateX(0)\", opacity: 1 }),\n                animate(\n                    \"0.23s cubic-bezier(0,0,0.3,1)\",\n                    style({ transform: \"translateX(-100%)\", opacity: 0 })\n                )\n            ])\n        ]),\n        trigger(\"overlayAnimation\", [\n            transition(\":enter\", [\n                style({ opacity: 0 }),\n                animate(\"1s cubic-bezier(0,0,0.3,1)\", style({ opacity: 1 }))\n            ]),\n            transition(\":leave\", [\n                style({ opacity: 1 }),\n                animate(\"1s cubic-bezier(0,0,0.3,1)\", style({ opacity: 0 }))\n            ])\n        ])\n    ]\n})\nexport class KeyboardShortcutsHelpComponent implements OnInit, OnDestroy, OnChanges {\n    /**\n     * Disable scrolling while modal is open\n     */\n    @Input() disableScrolling = true;\n    /**\n     * @ignore\n     */\n    private _key: string;\n\n    public className = \"help-modal\";\n\n    /**\n     * A description that will be shown in the help menu.\n     * MUST almost provide a label for the key to be shown\n     * in the help menu\n     */\n    @Input() keyDescription: string;\n\n    /**\n     * The label to group by the help menu toggle shortcut.\n     * must provide a description for the key to show\n     * in the help menu\n     */\n    @Input() keyLabel: string;\n\n    /**\n     * The label to group by the help menu close shortcut.\n     * must provide a description for the key to show\n     * in the help menu\n     */\n    @Input() closeKeyLabel: string;\n\n    /**\n     * A description that will be shown in the help menu.\n     * MUST almost provide a label for the key to be shown\n     * in the help menu\n     */\n    @Input() closeKeyDescription: string;\n\n    /**\n     * The shortcut to show/hide the help screen\n     */\n    @Input()\n    set key(value: string) {\n        this._key = value;\n        if (!value) {\n            return;\n        }\n        if (this.clearIds) {\n            this.keyboard.remove(this.clearIds);\n        }\n        this.clearIds = this.addShortcut({\n            key: value,\n            preventDefault: true,\n            command: () => this.toggle(),\n            description: this.keyDescription,\n            label: this.keyLabel\n        });\n    }\n\n    private addShortcut(shortcut: Shortcut) {\n        return this.keyboard.add(shortcut);\n    }\n\n    private _closeKey;\n    @Input() closeKey;\n\n    /**\n     * The title of the help screen\n     * @default: \"Keyboard shortcuts\"\n     */\n    @Input() title = \"Keyboard shortcuts\";\n    /**\n     * What message to show when no shortcuts are available on the page.\n     * @default \"No shortcuts available\"\n     */\n    @Input() emptyMessage = \"No shortcuts available\";\n    /**\n     * @ignore\n     */\n    @ViewChild(TemplateRef) template: TemplateRef<any>;\n    /**\n     * @ignore\n     */\n    shortcuts: Record<\"label\", { key: string[]; label: string; description: string }[]>;\n    /**\n     * @ignore\n     */\n    showing$ = new BehaviorSubject(false);\n    /**\n     * @ignore\n     */\n    labels: string[];\n    /**\n     * @ignore\n     */\n    private bodyPortalHost: DomPortalOutlet;\n\n    /**\n     * @ignore\n     */\n    constructor(\n        private componentFactoryResolver: ComponentFactoryResolver,\n        private appRef: ApplicationRef,\n        private keyboard: KeyboardShortcutsService,\n        private element: ElementRef,\n        private keyboardHelp: KeyboardShortcutsHelpService,\n        private viewContainer: ViewContainerRef,\n        private injector: Injector\n    ) {\n        this.bodyPortalHost = new DomPortalOutlet(\n            document.body,\n            this.componentFactoryResolver,\n            this.appRef,\n            this.injector\n        );\n    }\n\n    /**\n     * Reveal the help screen manually.\n     */\n    reveal(): KeyboardShortcutsHelpComponent {\n        this.hide();\n        if (this.disableScrolling) {\n            disableScroll(`.${this.className}`);\n        }\n        const portal = new TemplatePortal(this.template, this.viewContainer);\n        this.bodyPortalHost.attach(portal);\n        this.showing$.next(true);\n        return this;\n    }\n\n    /**\n     * Check if help screen is visible.\n     * @returns boolean\n     */\n    visible(): boolean {\n        return this.bodyPortalHost.hasAttached();\n    }\n\n    /**\n     * Hide the help screen manually.\n     */\n    hide(): KeyboardShortcutsHelpComponent {\n        if (this.disableScrolling) {\n            enableScroll();\n        }\n        if (!this.bodyPortalHost.hasAttached()) {\n            return this;\n        }\n        this.bodyPortalHost.detach();\n        this.showing$.next(false);\n        return this;\n    }\n\n    /**\n     * @ignore\n     */\n    ngOnDestroy(): void {\n        this.hide();\n        if (this.clearIds) {\n            this.keyboard.remove(this.clearIds);\n        }\n        if (this.closeKeyIds) {\n            this.keyboard.remove(this.closeKeyIds);\n        }\n        if (this.subscription) {\n            this.subscription.unsubscribe();\n        }\n        if (this.timeoutId) {\n            clearTimeout(this.timeoutId);\n        }\n    }\n\n    /**\n     * Show/Hide the help screen manually.\n     */\n    toggle(): KeyboardShortcutsHelpComponent {\n        this.visible() ? this.hide() : this.reveal();\n        return this;\n    }\n\n    /**\n     * @ignore\n     */\n    private subscription: SubscriptionLike;\n    /**\n     * @ignore\n     */\n    private clearIds;\n\n    /**\n     * @ignore\n     */\n    private closeKeyIds;\n    /**\n     * @ignore\n     */\n    private timeoutId;\n\n    /**\n     * @ignore\n     */\n    ngOnInit() {\n        this.subscription = this.keyboardHelp.shortcuts$\n            .pipe(\n                distinctUntilChanged(),\n                map((shortcuts) => groupBy(shortcuts, \"label\"))\n            )\n            .subscribe((shortcuts) => {\n                this.shortcuts = shortcuts;\n                this.labels = Object.keys(shortcuts);\n            });\n    }\n\n    ngOnChanges(changes: SimpleChanges): void {\n        if (!changes[\"closeKey\"].currentValue) {\n            return;\n        }\n        if (this.closeKeyIds) {\n            this.keyboard.remove(this.closeKeyIds);\n        }\n        this.closeKeyIds = this.addShortcut({\n            key: changes[\"closeKey\"].currentValue,\n            preventDefault: true,\n            command: () => this.hide(),\n            description: this.closeKeyDescription,\n            label: this.closeKeyDescription\n        });\n    }\n}\n","<ng-template>\n    <div class=\"help-modal__container\" [attr.aria-labelledby]=\"'modal-' + title\" role=\"dialog\">\n        <div class=\"{{className}}\" [@enterAnimation] *ngIf=\"showing$ | async\">\n            <div class=\"title\">\n                <h3 id=\"modal-{{title}}\" class=\"title__text\">{{title}}</h3>\n            </div>\n            <div class=\"help-modal__body\">\n                <span *ngIf=\"!labels.length\">\n                    {{emptyMessage}}\n                </span>\n                <div>\n                    <ul *ngFor=\"let label of labels\" class=\"help-modal__list\">\n                        <h4 class=\"item-group-label\">{{label}}</h4>\n                        <ng-keyboard-shortcuts-help-item\n                                *ngFor=\"let shortcut of shortcuts[label]; let i = index\"\n                                [shortcut]=\"shortcut\"\n                                [index]=\"i\"\n                        ></ng-keyboard-shortcuts-help-item>\n                    </ul>\n                </div>\n            </div>\n        </div>\n        <div class=\"help-modal__backdrop\" [@overlayAnimation] (mousedown)=\"hide()\" *ngIf=\"showing$ | async\"></div>\n    </div>\n</ng-template>\n"]}