@spartacus/storefront
Version:
Spartacus Storefront is a package that you can include in your application, which allows you to add default storefront features.
156 lines • 18.7 kB
JavaScript
import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';
import { distinctUntilChanged, filter, map } from 'rxjs/operators';
import * as i0 from "@angular/core";
/**
* Supposed to be injected in the split view component, so that the split view state
* is maintained for a single split view.
*/
export class SplitViewService {
constructor() {
/**
* Newly added views are hidden by default, unless it is the first view of the split view.
* The default hide mode can be overridden.
*/
this.defaultHideMode = true;
this.splitViewCount = 1;
this._views$ = new BehaviorSubject([]);
}
/**
* Adds a view to the list of views. The view is initialized with the `SplitViewState`
* state. If no state is provided, the state is created with the hidden property. The hidden
* property is provided by the `defaultHideMode`, unless it's the first view (position: 0).
*/
add(position, initialState) {
const state = Object.assign({ hidden: position === 0 ? false : this.defaultHideMode }, initialState);
if (!this.views[position]) {
this.views[position] = state;
this.updateState(position, state.hidden);
this._views$.next(this.views);
}
}
/**
* The split view is based on a number of views that can be used next to each other.
* When the number changes (i.e. if the screen goes from wide to small), the visibility state
* of the views should be updated.
*/
updateSplitView(splitViewCount) {
if (splitViewCount !== this.splitViewCount) {
this.splitViewCount = splitViewCount;
this.updateState();
}
}
/**
* Returns an observable with the active view number. The active view number
* represents the last visible view.
*/
getActiveView() {
return this._views$.pipe(map((views) => this.getActive(views)), distinctUntilChanged());
}
/**
* Returns an observable with the SplitViewState for the given view position.
*/
getViewState(position) {
return this._views$.pipe(map((views) => views[position]),
// we must filter here, since outlet driven views will destroyed the view
filter((view) => Boolean(view)));
}
/**
* Removes a view from the list of views.
*
* Removing a view is different from hiding a view. Removing a view is typically done
* when a component is destroyed.
*
* When the view is removed, the SplitViewState is updated to reflect that new organization
* of views.
*/
remove(position) {
const activePosition = this.getActive(this.views);
this._views$.next(this.views.splice(0, position));
if (activePosition >= position) {
this.updateState(position);
}
}
/**
* Returns the next view position. This is useful for views that do not want to be bothered
* with controlling view numbers.
*/
get nextPosition() {
return this.views.length || 0;
}
/**
* Toggles the visibility of the views based on the given view position. If the view
* is already visible, we close the view and active the former view. Unless the hide flag
* is used, to force the view.
*
* The view state of other views in the split view are updated as well.
*
* @param position The zero-based position number of the view.
* @param forceHide The (optional) hide state for the view position.
*/
toggle(position, forceHide) {
// add the view if it hasn't been added before.
if (!this.views[position]) {
this.add(position, { hidden: forceHide !== null && forceHide !== void 0 ? forceHide : false });
}
// If the position is already visible, we move to a previous position. Only if the hide
// state is forced, we keep the current position.
if (this.views[position] &&
forceHide === undefined &&
!this.views[position].hidden) {
position--;
}
this.updateState(position, forceHide === true);
}
/**
* Updates the hidden state of all the views.
*/
updateState(position, hide) {
const views = [...this.views];
if (hide !== undefined && views[position]) {
views[position].hidden = hide;
}
let lastVisible = views.length - [...views].reverse().findIndex((view) => !view.hidden) - 1;
if (lastVisible === views.length) {
if (position) {
// When there's only 1 view (mobile), we might not find any active
// if the user navigates back.
lastVisible = position - 1;
}
else {
lastVisible = views.length - 1;
}
}
views.forEach((view, pos) => {
if (view && pos !== position) {
// hide other views that are outside the split view
view.hidden =
pos > lastVisible || pos < lastVisible - (this.splitViewCount - 1);
}
});
this._views$.next(views);
}
/**
* Returns the active view count for the list of views.
*/
getActive(views) {
// we reverse the list to find the last visible view
const l = [...views]
.reverse()
.findIndex((view) => !view.hidden);
const last = l === -1 ? 0 : views.length - l - 1;
return last;
}
/**
* Utility method that resolves all views from the subject.
*/
get views() {
return this._views$.value;
}
}
SplitViewService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: SplitViewService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
SplitViewService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: SplitViewService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: SplitViewService, decorators: [{
type: Injectable
}] });
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The view is initialized with the `SplitViewState`\n   * state. If no state is provided, the state is created with the hidden property. The hidden\n   * property is provided by the `defaultHideMode`, unless it's the first view (position: 0).\n   */\n  add(position: number, initialState?: SplitViewState) {\n    const state: SplitViewState = {\n      ...{ hidden: position === 0 ? false : this.defaultHideMode },\n      ...initialState,\n    };\n    if (!this.views[position]) {\n      this.views[position] = state;\n      this.updateState(position, state.hidden);\n      this._views$.next(this.views);\n    }\n  }\n\n  /**\n   * The split view is based on a number of views that can be used next to each other.\n   * When the number changes (i.e. if the screen goes from wide to small), the visibility state\n   * of the views should be updated.\n   */\n  updateSplitView(splitViewCount: number) {\n    if (splitViewCount !== this.splitViewCount) {\n      this.splitViewCount = splitViewCount;\n      this.updateState();\n    }\n  }\n\n  /**\n   * Returns an observable with the active view number. The active view number\n   * represents the last visible view.\n   */\n  getActiveView(): Observable<number> {\n    return this._views$.pipe(\n      map((views) => this.getActive(views)),\n      distinctUntilChanged()\n    );\n  }\n\n  /**\n   * Returns an observable with the SplitViewState for the given view position.\n   */\n  getViewState(position: number): Observable<SplitViewState> {\n    return this._views$.pipe(\n      map((views) => views[position]),\n      // we must filter here, since outlet driven views will destroyed the view\n      filter((view) => Boolean(view))\n    );\n  }\n\n  /**\n   * Removes a view from the list of views.\n   *\n   * Removing a view is different from hiding a view. Removing a view is typically done\n   * when a component is destroyed.\n   *\n   * When the view is removed, the SplitViewState is updated to reflect that new organization\n   * of views.\n   */\n  remove(position: number) {\n    const activePosition = this.getActive(this.views);\n    this._views$.next(this.views.splice(0, position));\n    if (activePosition >= position) {\n      this.updateState(position);\n    }\n  }\n\n  /**\n   * Returns the next view position. This is useful for views that do not want to be bothered\n   * with controlling view numbers.\n   */\n  get nextPosition(): number {\n    return this.views.length || 0;\n  }\n\n  /**\n   * Toggles the visibility of the views based on the given view position. If the view\n   * is already visible, we close the view and active the former view. Unless the hide flag\n   * is used, to force the view.\n   *\n   * The view state of other views in the split view are updated as well.\n   *\n   * @param position The zero-based position number of the view.\n   * @param forceHide The (optional) hide state for the view position.\n   */\n  toggle(position: number, forceHide?: boolean) {\n    // add the view if it hasn't been added before.\n    if (!this.views[position]) {\n      this.add(position, { hidden: forceHide ?? false });\n    }\n\n    // If the position is already visible, we move to a previous position. Only if the hide\n    // state is forced, we keep the current position.\n    if (\n      this.views[position] &&\n      forceHide === undefined &&\n      !this.views[position].hidden\n    ) {\n      position--;\n    }\n\n    this.updateState(position, forceHide === true);\n  }\n\n  /**\n   * Updates the hidden state of all the views.\n   */\n  protected updateState(position?: number, hide?: boolean) {\n    const views = [...this.views];\n    if (hide !== undefined && views[position]) {\n      views[position].hidden = hide;\n    }\n    let lastVisible =\n      views.length - [...views].reverse().findIndex((view) => !view.hidden) - 1;\n\n    if (lastVisible === views.length) {\n      if (position) {\n        // When there's only 1 view (mobile), we might not find any active\n        // if the user navigates back.\n        lastVisible = position - 1;\n      } else {\n        lastVisible = views.length - 1;\n      }\n    }\n\n    views.forEach((view, pos) => {\n      if (view && pos !== position) {\n        // hide other views that are outside the split view\n        view.hidden =\n          pos > lastVisible || pos < lastVisible - (this.splitViewCount - 1);\n      }\n    });\n\n    this._views$.next(views);\n  }\n\n  /**\n   * Returns the active view count for the list of views.\n   */\n  protected getActive(views: SplitViewState[]): number {\n    // we reverse the list to find the last visible view\n    const l = [...views]\n      .reverse()\n      .findIndex((view: SplitViewState) => !view.hidden);\n    const last = l === -1 ? 0 : views.length - l - 1;\n    return last;\n  }\n\n  /**\n   * Utility method that resolves all views from the subject.\n   */\n  protected get views(): SplitViewState[] {\n    return this._views$.value;\n  }\n}\n"]}