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sidebar.component.ts
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sidebar.component.ts
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/**
* @license
* Copyright Akveo. All Rights Reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*/
import {
ChangeDetectionStrategy,
ChangeDetectorRef,
Component,
ElementRef,
EventEmitter,
HostBinding,
Input,
OnDestroy,
OnInit,
Output,
} from '@angular/core';
import { combineLatest, Observable, Subject } from 'rxjs';
import { takeUntil, filter, map, startWith } from 'rxjs/operators';
import { convertToBoolProperty, NbBooleanInput } from '../helpers';
import { NbThemeService } from '../../services/theme.service';
import { NbMediaBreakpoint } from '../../services/breakpoints.service';
import { NbSidebarService, getSidebarState$, getSidebarResponsiveState$ } from './sidebar.service';
export type NbSidebarState = 'expanded' | 'collapsed' | 'compacted';
export type NbSidebarResponsiveState = 'mobile' | 'tablet' | 'pc';
/**
* Sidebar header container.
*
* Placeholder which contains a sidebar header content,
* placed at the very top of the sidebar outside of the scroll area.
*/
@Component({
selector: 'nb-sidebar-header',
template: ` <ng-content></ng-content> `,
})
export class NbSidebarHeaderComponent {}
/**
* Sidebar footer container.
*
* Placeholder which contains a sidebar footer content,
* placed at the very bottom of the sidebar outside of the scroll area.
*/
@Component({
selector: 'nb-sidebar-footer',
template: ` <ng-content></ng-content> `,
})
export class NbSidebarFooterComponent {}
/**
* Layout sidebar component.
*
* @stacked-example(Showcase, sidebar/sidebar-showcase.component)
*
* ### Installation
*
* Import `NbSidebarModule.forRoot()` to your app module.
* ```ts
* @NgModule({
* imports: [
* // ...
* NbSidebarModule.forRoot(),
* ],
* })
* export class AppModule { }
* ```
* and `NbSidebarModule` to your feature module where the component should be shown:
* ```ts
* @NgModule({
* imports: [
* // ...
* NbSidebarModule,
* ],
* })
* export class PageModule { }
* ```
* ### Usage
*
* Sidebar can be placed on the left or the right side of the layout,
* or on start/end position of layout (depends on document direction, left to right or right to left)
* It can be fixed (shown above the content) or can push the layout when opened.
*
* There are three states - `expanded`, `collapsed`, `compacted`.
* By default sidebar content is fixed and saves its position while the page is being scrolled.
*
* Compacted sidebar example:
* @stacked-example(Compacted Sidebar, sidebar/sidebar-compacted.component)
*
* Sidebar also supports a `responsive` behavior, listening to window size change and changing its size respectably.
*
* In a pair with header it is possible to setup a configuration when header is placed on a side of the sidebar
* and not on top of it. To achieve this simply put a `subheader` property to the header like this:
* ```html
* <nb-layout-header subheader></nb-layout-header>
* ```
* @stacked-example(Subheader, layout/layout-sidebar-subheader.component)
* Note that in such configuration sidebar shadow is removed and header cannot be make `fixed`.
*
* @additional-example(Right Sidebar, sidebar/sidebar-right.component)
* @additional-example(Fixed Sidebar, sidebar/sidebar-fixed.component)
*
* @styles
*
* sidebar-background-color:
* sidebar-text-color:
* sidebar-text-font-family:
* sidebar-text-font-size:
* sidebar-text-font-weight:
* sidebar-text-line-height:
* sidebar-height:
* sidebar-width:
* sidebar-width-compact:
* sidebar-padding:
* sidebar-header-height:
* sidebar-footer-height:
* sidebar-shadow:
* sidebar-menu-item-highlight-color:
* sidebar-scrollbar-background-color:
* sidebar-scrollbar-color:
* sidebar-scrollbar-width:
*/
@Component({
selector: 'nb-sidebar',
styleUrls: ['./sidebar.component.scss'],
template: `
<div class="main-container" [class.main-container-fixed]="containerFixedValue">
<ng-content select="nb-sidebar-header"></ng-content>
<div class="scrollable" (click)="onClick($event)">
<ng-content></ng-content>
</div>
<ng-content select="nb-sidebar-footer"></ng-content>
</div>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class NbSidebarComponent implements OnInit, OnDestroy {
protected readonly responsiveValueChange$: Subject<boolean> = new Subject<boolean>();
protected responsiveState: NbSidebarResponsiveState = 'pc';
protected destroy$ = new Subject<void>();
containerFixedValue: boolean = true;
@HostBinding('class.fixed') fixedValue: boolean = false;
@HostBinding('class.right') rightValue: boolean = false;
@HostBinding('class.left') leftValue: boolean = true;
@HostBinding('class.start') startValue: boolean = false;
@HostBinding('class.end') endValue: boolean = false;
@HostBinding('class.expanded')
get expanded() {
return this.state === 'expanded';
}
@HostBinding('class.collapsed')
get collapsed() {
return this.state === 'collapsed';
}
@HostBinding('class.compacted')
get compacted() {
return this.state === 'compacted';
}
/**
* Places sidebar on the right side
* @type {boolean}
*/
@Input()
set right(val: boolean) {
this.rightValue = convertToBoolProperty(val);
this.leftValue = !this.rightValue;
this.startValue = false;
this.endValue = false;
}
static ngAcceptInputType_right: NbBooleanInput;
/**
* Places sidebar on the left side
* @type {boolean}
*/
@Input()
set left(val: boolean) {
this.leftValue = convertToBoolProperty(val);
this.rightValue = !this.leftValue;
this.startValue = false;
this.endValue = false;
}
static ngAcceptInputType_left: NbBooleanInput;
/**
* Places sidebar on the start edge of layout
* @type {boolean}
*/
@Input()
set start(val: boolean) {
this.startValue = convertToBoolProperty(val);
this.endValue = !this.startValue;
this.leftValue = false;
this.rightValue = false;
}
static ngAcceptInputType_start: NbBooleanInput;
/**
* Places sidebar on the end edge of layout
* @type {boolean}
*/
@Input()
set end(val: boolean) {
this.endValue = convertToBoolProperty(val);
this.startValue = !this.endValue;
this.leftValue = false;
this.rightValue = false;
}
static ngAcceptInputType_end: NbBooleanInput;
/**
* Makes sidebar fixed (shown above the layout content)
* @type {boolean}
*/
@Input()
set fixed(val: boolean) {
this.fixedValue = convertToBoolProperty(val);
}
static ngAcceptInputType_fixed: NbBooleanInput;
/**
* Makes sidebar container fixed
* @type {boolean}
*/
@Input()
set containerFixed(val: boolean) {
this.containerFixedValue = convertToBoolProperty(val);
}
static ngAcceptInputType_containerFixed: NbBooleanInput;
/**
* Initial sidebar state, `expanded`|`collapsed`|`compacted`
* @type {string}
*/
@Input()
get state(): NbSidebarState {
return this._state;
}
set state(value: NbSidebarState) {
this._state = value;
}
protected _state: NbSidebarState = 'expanded';
/**
* Makes sidebar listen to media query events and change its behaviour
* @type {boolean}
*/
@Input()
get responsive(): boolean {
return this._responsive;
}
set responsive(value: boolean) {
if (this.responsive !== convertToBoolProperty(value)) {
this._responsive = !this.responsive;
this.responsiveValueChange$.next(this.responsive);
}
}
protected _responsive: boolean = false;
static ngAcceptInputType_responsive: NbBooleanInput;
/**
* Tags a sidebar with some ID, can be later used in the sidebar service
* to determine which sidebar triggered the action, if multiple sidebars exist on the page.
*
* @type {string}
*/
@Input() tag: string;
// TODO: get width by the key and define only max width for the tablets and mobiles
/**
* Controls on which screen sizes sidebar should be switched to compacted state.
* Works only when responsive mode is on.
* Default values are `['xs', 'is', 'sm', 'md', 'lg']`.
*
* @type string[]
*/
@Input() compactedBreakpoints: string[] = ['xs', 'is', 'sm', 'md', 'lg'];
/**
* Controls on which screen sizes sidebar should be switched to collapsed state.
* Works only when responsive mode is on.
* Default values are `['xs', 'is']`.
*
* @type string[]
*/
@Input() collapsedBreakpoints: string[] = ['xs', 'is'];
/**
* Emits whenever sidebar state change.
*/
@Output() readonly stateChange = new EventEmitter<NbSidebarState>();
/**
* Emits whenever sidebar responsive state change.
*/
@Output() readonly responsiveStateChange = new EventEmitter<NbSidebarResponsiveState>();
constructor(
private sidebarService: NbSidebarService,
private themeService: NbThemeService,
private element: ElementRef,
private cd: ChangeDetectorRef,
) {}
ngOnInit() {
this.sidebarService
.onToggle()
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(({ compact }) => this.toggle(compact));
this.sidebarService
.onExpand()
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(() => this.expand());
this.sidebarService
.onCollapse()
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(() => this.collapse());
this.sidebarService
.onCompact()
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(() => this.compact());
getSidebarState$
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(({ observer }) => observer.next(this.state));
getSidebarResponsiveState$
.pipe(
filter(({ tag }) => !this.tag || this.tag === tag),
takeUntil(this.destroy$),
)
.subscribe(({ observer }) => observer.next(this.responsiveState));
this.responsiveValueChange$
.pipe(
filter((responsive: boolean) => !responsive),
takeUntil(this.destroy$),
)
.subscribe(() => this.expand());
this.subscribeToMediaQueryChange();
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
// TODO: this is more of a workaround, should be a better way to make components communicate to each other
onClick(event): void {
const menu = this.element.nativeElement.querySelector('nb-menu');
if (menu && menu.contains(event.target)) {
const link = this.getMenuLink(event.target);
if (link && link.nextElementSibling && link.nextElementSibling.classList.contains('menu-items')) {
this.sidebarService.expand(this.tag);
}
}
}
/**
* Collapses the sidebar
*/
collapse() {
this.updateState('collapsed');
}
/**
* Expands the sidebar
*/
expand() {
this.updateState('expanded');
}
/**
* Compacts the sidebar (minimizes)
*/
compact() {
this.updateState('compacted');
}
/**
* Toggles sidebar state (expanded|collapsed|compacted)
* @param {boolean} compact If true, then sidebar state will be changed between expanded & compacted,
* otherwise - between expanded & collapsed. False by default.
*
* Toggle sidebar state
*
* ```ts
* this.sidebar.toggle(true);
* ```
*/
toggle(compact: boolean = false) {
if (this.responsive) {
if (this.responsiveState === 'mobile') {
compact = false;
}
}
if (this.state === 'compacted' || this.state === 'collapsed') {
this.updateState('expanded');
} else {
this.updateState(compact ? 'compacted' : 'collapsed');
}
}
protected subscribeToMediaQueryChange() {
combineLatest([
this.responsiveValueChange$.pipe(startWith(this.responsive)),
this.themeService.onMediaQueryChange() as Observable<[NbMediaBreakpoint, NbMediaBreakpoint]>,
])
.pipe(
filter(([responsive]) => responsive),
map(([, breakpoints]) => breakpoints),
takeUntil(this.destroy$),
)
.subscribe(([prev, current]: [NbMediaBreakpoint, NbMediaBreakpoint]) => {
const isCollapsed = this.collapsedBreakpoints.includes(current.name);
const isCompacted = this.compactedBreakpoints.includes(current.name);
let newResponsiveState;
if (isCompacted) {
this.fixed = this.containerFixedValue;
this.compact();
newResponsiveState = 'tablet';
}
if (isCollapsed) {
this.fixed = true;
this.collapse();
newResponsiveState = 'mobile';
}
if (!isCollapsed && !isCompacted && (!prev.width || prev.width < current.width)) {
this.expand();
this.fixed = false;
newResponsiveState = 'pc';
}
if (newResponsiveState && newResponsiveState !== this.responsiveState) {
this.responsiveState = newResponsiveState;
this.responsiveStateChange.emit(this.responsiveState);
this.cd.markForCheck();
}
});
}
protected getMenuLink(element: HTMLElement): HTMLElement | undefined {
if (!element || element.tagName.toLowerCase() === 'nb-menu') {
return undefined;
}
if (element.tagName.toLowerCase() === 'a') {
return element;
}
return this.getMenuLink(element.parentElement);
}
protected updateState(state: NbSidebarState): void {
if (this.state !== state) {
this.state = state;
this.stateChange.emit(this.state);
this.cd.markForCheck();
}
}
}