@clr/angular
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Angular components for Clarity
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JavaScript
/*
* Copyright (c) 2016-2023 VMware, Inc. All Rights Reserved.
* This software is released under MIT license.
* The full license information can be found in LICENSE in the root directory of this project.
*/
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
import * as i1 from "./page-collection.service";
import * as i2 from "./button-hub.service";
/**
* Performs navigation functions for a wizard and manages the current page. Presented as a
* separate service to encapsulate the behavior of navigating and completing the wizard so
* that it can be shared across the wizard and its sub-components.
*
* The easiest way to access the navigation service is there a reference on your wizard. The
* Following example would allow you to access your instance of the wizard from your host
* component and thereby access the navigation service via YourHostComponent.wizard.navService.
*
* @example
* <clr-wizard #wizard ...>
*
* @example
* export class YourHostComponent {
* @ViewChild("wizard") wizard: Wizard;
* ...
* }
*
*/
export class WizardNavigationService {
/**
* Creates an instance of WizardNavigationService. Also sets up subscriptions
* that listen to the button service to determine when a button has been clicked
* in the wizard. Is also responsible for taking action when the page collection
* requests that navigation be reset to its pristine state.
*
* @memberof WizardNavigationService
*/
constructor(pageCollection, buttonService) {
this.pageCollection = pageCollection;
this.buttonService = buttonService;
/**
* A Boolean flag used by the ClrWizardPage to avoid a race condition when pages are
* loading and there is no current page defined.
*
* @memberof WizardNavigationService
*/
this.navServiceLoaded = false;
/**
* A boolean flag shared across the Wizard subcomponents that follows the value
* of the Wizard.forceForward (clrWizardForceForwardNavigation) input. When true,
* navigating backwards in the stepnav menu will reset any skipped pages' completed
* state to false.
*
* This is useful when a wizard executes validation on a page-by-page basis when
* the next button is clicked.
*
* @memberof WizardNavigationService
*/
this.forceForwardNavigation = false;
/**
* A boolean flag shared across the Wizard subcomponents that follows the value
* of the Wizard.stopCancel (clrWizardPreventDefaultCancel) input. When true, the cancel
* routine is subverted and must be reinstated in the host component calling Wizard.close()
* at some point.
*
* @memberof WizardNavigationService
*/
this.wizardHasAltCancel = false;
/**
* A boolean flag shared across the Wizard subcomponents that follows the value
* of the Wizard.stopNext (clrWizardPreventDefaultNext) input. When true, the next and finish
* routines are subverted and must be reinstated in the host component calling Wizard.next(),
* Wizard.forceNext(), Wizard.finish(), or Wizard.forceFinish().
*
* @memberof WizardNavigationService
*/
this.wizardHasAltNext = false;
/**
* A boolean flag shared across the Wizard subcomponents that follows the value
* of the Wizard.stopNavigation (clrWizardPreventNavigation) input. When true, all
* navigational elements in the wizard are disabled.
*
* This is intended to freeze the wizard in place. Events are not fired so this is
* not a way to implement alternate functionality for navigation.
*
* @memberof WizardNavigationService
*/
this.wizardStopNavigation = false;
/**
* A boolean flag shared with the stepnav items that prevents user clicks on
* stepnav items from navigating the wizard.
*
* @memberof WizardNavigationService
*/
this.wizardDisableStepnav = false;
/**
*
* @memberof WizardNavigationService
*/
this._currentChanged = new Subject();
/**
* @memberof WizardNavigationService
*/
this._movedToNextPage = new Subject();
/**
* @memberof WizardNavigationService
*/
this._wizardFinished = new Subject();
/**
* @memberof WizardNavigationService
*/
this._movedToPreviousPage = new Subject();
/**
* @memberof WizardNavigationService
*/
this._cancelWizard = new Subject();
this.previousButtonSubscription = this.buttonService.previousBtnClicked.subscribe(() => {
const currentPage = this.currentPage;
if (this.currentPageIsFirst || currentPage.previousStepDisabled) {
return;
}
currentPage.previousButtonClicked.emit(currentPage);
if (!currentPage.preventDefault) {
this.previous();
}
});
this.nextButtonSubscription = this.buttonService.nextBtnClicked.subscribe(() => {
this.checkAndCommitCurrentPage('next');
});
this.dangerButtonSubscription = this.buttonService.dangerBtnClicked.subscribe(() => {
this.checkAndCommitCurrentPage('danger');
});
this.finishButtonSubscription = this.buttonService.finishBtnClicked.subscribe(() => {
this.checkAndCommitCurrentPage('finish');
});
this.customButtonSubscription = this.buttonService.customBtnClicked.subscribe((type) => {
if (!this.wizardStopNavigation) {
this.currentPage.customButtonClicked.emit(type);
}
});
this.cancelButtonSubscription = this.buttonService.cancelBtnClicked.subscribe(() => {
if (this.wizardStopNavigation) {
return;
}
if (this.currentPage.preventDefault) {
this.currentPage.pageOnCancel.emit(this.currentPage);
}
else {
this.cancel();
}
});
this.pagesResetSubscription = this.pageCollection.pagesReset.subscribe(() => {
this.setFirstPageCurrent();
});
}
/**
* An Observable that is predominantly used amongst the subcomponents and services
* of the wizard. It is recommended that users listen to the ClrWizardPage.onLoad
* (clrWizardPageOnLoad) output instead of this Observable.
*
* @memberof WizardNavigationService
*/
get currentPageChanged() {
// TODO: MAKE SURE EXTERNAL OUTPUTS SAY 'CHANGE' NOT 'CHANGED'
// A BREAKING CHANGE SO AWAITING MINOR RELEASE
return this._currentChanged.asObservable();
}
/**
* @memberof WizardNavigationService
*/
get currentPageTitle() {
// when the querylist of pages is empty. this is the first place it fails...
if (!this.currentPage) {
return null;
}
return this.currentPage.title;
}
/**
* Returns a Boolean that tells you whether or not the current page is the first
* page in the Wizard.
*
* This is helpful for determining whether a page is navigable.
*
* @memberof WizardNavigationService
*/
get currentPageIsFirst() {
return this.pageCollection.firstPage === this.currentPage;
}
/**
* Returns a Boolean that tells you whether or not the current page is the
* last page in the Wizard.
*
* This is used to determine which buttons should display in the wizard footer.
*
* @memberof WizardNavigationService
*/
get currentPageIsLast() {
return this.pageCollection.lastPage === this.currentPage;
}
/**
* Returns the ClrWizardPage object of the current page or null.
*
* @memberof WizardNavigationService
*/
get currentPage() {
if (!this._currentPage) {
return null;
}
return this._currentPage;
}
/**
* Accepts a ClrWizardPage object, since that object to be the current/active
* page in the wizard, and emits the ClrWizardPage.onLoad (clrWizardPageOnLoad)
* event for that page.
*
* Note that all of this work is bypassed if the ClrWizardPage object is already
* the current page.
*
* @memberof WizardNavigationService
*/
set currentPage(page) {
if (this._currentPage !== page && !this.wizardStopNavigation) {
this._currentPage = page;
page.onLoad.emit(page.id);
this._currentChanged.next(page);
}
}
/**
* An observable used internally to alert the wizard that forward navigation
* has occurred. It is recommended that you use the Wizard.onMoveNext
* (clrWizardOnNext) output instead of this one.
*
* @memberof WizardNavigationService
*/
get movedToNextPage() {
return this._movedToNextPage.asObservable();
}
/**
* An observable used internally to alert the wizard that the nav service
* has approved completion of the wizard.
*
* It is recommended that you use the Wizard.wizardFinished (clrWizardOnFinish)
* output instead of this one.
*
* @memberof WizardNavigationService
*/
get wizardFinished() {
return this._wizardFinished.asObservable();
}
/**
* Notifies the wizard when backwards navigation has occurred via the
* previous button.
*
* @memberof WizardNavigationService
*/
get movedToPreviousPage() {
return this._movedToPreviousPage.asObservable();
}
/**
* Notifies the wizard that a user is trying to cancel it.
*
* @memberof WizardNavigationService
*/
get notifyWizardCancel() {
return this._cancelWizard.asObservable();
}
/**
*
* @memberof WizardNavigationService
*/
ngOnDestroy() {
this.previousButtonSubscription.unsubscribe();
this.nextButtonSubscription.unsubscribe();
this.dangerButtonSubscription.unsubscribe();
this.finishButtonSubscription.unsubscribe();
this.customButtonSubscription.unsubscribe();
this.cancelButtonSubscription.unsubscribe();
this.pagesResetSubscription.unsubscribe();
}
/**
* This is a public function that can be used to programmatically advance
* the user to the next page.
*
* When invoked, this method will move the wizard to the next page after
* successful validation. Note that this method goes through all checks
* and event emissions as if Wizard.next(false) had been called.
*
* In most cases, it makes more sense to use Wizard.next(false).
*
* @memberof WizardNavigationService
*/
next() {
if (this.currentPageIsLast) {
this.checkAndCommitCurrentPage('finish');
}
else {
this.checkAndCommitCurrentPage('next');
}
}
/**
* Bypasses checks and most event emissions to force a page to navigate forward.
*
* Comparable to calling Wizard.next() or Wizard.forceNext().
*
* @memberof WizardNavigationService
*/
forceNext() {
const currentPage = this.currentPage;
const nextPage = this.pageCollection.getNextPage(currentPage);
// catch errant null or undefineds that creep in
if (!nextPage) {
throw new Error('The wizard has no next page to go to.');
}
if (this.wizardStopNavigation) {
return;
}
if (!currentPage.completed) {
// this is a state that alt next flows can get themselves in...
this.pageCollection.commitPage(currentPage);
}
this.currentPage = nextPage;
}
/**
* Accepts a button/action type as a parameter. Encapsulates all logic for
* event emissions, state of the current page, and wizard and page level overrides.
*
* Avoid calling this function directly unless you really know what you're doing.
*
* @memberof WizardNavigationService
*/
checkAndCommitCurrentPage(buttonType) {
const currentPage = this.currentPage;
if (!currentPage.readyToComplete || this.wizardStopNavigation) {
return;
}
const iAmTheLastPage = this.currentPageIsLast;
const isNext = buttonType === 'next';
const isDanger = buttonType === 'danger';
const isDangerNext = isDanger && !iAmTheLastPage;
const isDangerFinish = isDanger && iAmTheLastPage;
const isFinish = buttonType === 'finish' || isDangerFinish;
if (isFinish && !iAmTheLastPage) {
return;
}
currentPage.primaryButtonClicked.emit(buttonType);
if (isFinish) {
currentPage.finishButtonClicked.emit(currentPage);
}
else if (isDanger) {
currentPage.dangerButtonClicked.emit();
}
else if (isNext) {
currentPage.nextButtonClicked.emit();
}
if (currentPage.stopNext || currentPage.preventDefault) {
currentPage.onCommit.emit(currentPage.id);
return;
}
// order is very important with these emitters!
if (isFinish) {
// mark page as complete
if (!this.wizardHasAltNext) {
this.pageCollection.commitPage(currentPage);
}
this._wizardFinished.next();
}
if (this.wizardHasAltNext) {
this.pageCollection.commitPage(currentPage);
if (isNext || isDangerNext) {
this._movedToNextPage.next(true);
}
// jump out here, no matter what type we're looking at
return;
}
if (isNext || isDangerNext) {
this.forceNext();
}
if (!this.wizardHasAltNext && !this.wizardStopNavigation) {
this._movedToNextPage.next(true);
}
}
/**
* This is a public function that can be used to programmatically conclude
* the wizard.
*
* When invoked, this method will initiate the work involved with finalizing
* and finishing the wizard workflow. Note that this method goes through all
* checks and event emissions as if Wizard.finish(false) had been called.
*
* In most cases, it makes more sense to use Wizard.finish(false).
*
* @memberof WizardNavigationService
*/
finish() {
this.checkAndCommitCurrentPage('finish');
}
/**
* Programmatically moves the wizard to the page before the current page.
*
* In most instances, it makes more sense to call Wizard.previous()
* which does the same thing.
*
* @memberof WizardNavigationService
*/
previous() {
if (this.currentPageIsFirst || this.wizardStopNavigation) {
return;
}
const previousPage = this.pageCollection.getPreviousPage(this.currentPage);
if (!previousPage) {
return;
}
this._movedToPreviousPage.next(true);
if (this.forceForwardNavigation) {
this.currentPage.completed = false;
}
this.currentPage = previousPage;
}
/**
* Allows a hook into the cancel workflow of the wizard from the nav service. Note that
* this route goes through all checks and event emissions as if a cancel button had
* been clicked.
*
* In most cases, users looking for a hook into the cancel routine are actually looking
* for a way to close the wizard from their host component because they have prevented
* the default cancel action.
*
* In this instance, it is recommended that you use Wizard.close() to avoid any event
* emission loop resulting from an event handler calling back into routine that will
* again evoke the events it handles.
*
* @memberof WizardNavigationService
*/
cancel() {
this._cancelWizard.next();
}
/**
* Performs all required checks to determine if a user can navigate to a page. Checking at each
* point if a page is navigable -- completed where the page immediately after the last completed
* page.
*
* Takes two parameters. The first one must be either the ClrWizardPage object or the ID of the
* ClrWizardPage object that you want to make the current page.
*
* The second parameter is optional and is a Boolean flag for "lazy completion". What this means
* is the Wizard will mark all pages between the current page and the page you want to navigate
* to as completed. This is useful for informational wizards that do not require user action,
* allowing an easy means for users to jump ahead.
*
* To avoid checks on navigation, use ClrWizardPage.makeCurrent() instead.
*
* @memberof WizardNavigationService
*/
goTo(pageToGoToOrId, lazyComplete = false) {
const myPages = this.pageCollection;
const pageToGoTo = typeof pageToGoToOrId === 'string' ? myPages.getPageById(pageToGoToOrId) : pageToGoToOrId;
const currentPage = this.currentPage;
// no point in going to the current page. you're there already!
// also hard block on any navigation when stopNavigation is true
if (pageToGoTo === currentPage || this.wizardStopNavigation) {
return;
}
const currentPageIndex = myPages.getPageIndex(currentPage);
const goToPageIndex = myPages.getPageIndex(pageToGoTo);
const goingForward = goToPageIndex > currentPageIndex;
const pagesToCheck = myPages.getPageRangeFromPages(this.currentPage, pageToGoTo);
const okayToMove = lazyComplete || this.canGoTo(pagesToCheck);
if (!okayToMove) {
return;
}
if (goingForward && lazyComplete) {
pagesToCheck.forEach((page) => {
if (page !== pageToGoTo) {
page.completed = true;
}
});
}
else if (!goingForward && this.forceForwardNavigation) {
pagesToCheck.forEach((page) => {
page.completed = false;
});
}
this.currentPage = pageToGoTo;
}
/**
* Accepts a range of ClrWizardPage objects as a parameter. Performs the work of checking
* those objects to determine if navigation can be accomplished.
*
* @memberof WizardNavigationService
*/
canGoTo(pagesToCheck) {
let okayToMove = true;
const myPages = this.pageCollection;
// previous page can be important when moving because if it's completed it
// allows us to move to the page even if it's incomplete...
let previousPagePasses;
if (!pagesToCheck || pagesToCheck.length < 1) {
return false;
}
pagesToCheck.forEach((page) => {
if (!okayToMove) {
return;
}
if (page.completed) {
// default is true. just jump out instead of complicating it.
return;
}
// so we know our page is not completed...
const previousPage = myPages.getPageIndex(page) > 0 ? myPages.getPreviousPage(page) : null;
previousPagePasses = previousPage === null || previousPage.completed === true;
// we are false if not the current page AND previous page is not completed
// (but must have a previous page)
if (!page.current && !previousPagePasses) {
okayToMove = false;
}
// falls through to true as default
});
return okayToMove;
}
/**
* Looks through the collection of pages to find the first one that is incomplete
* and makes that page the current/active page.
*
* @memberof WizardNavigationService
*/
setLastEnabledPageCurrent() {
const allPages = this.pageCollection.pagesAsArray;
let lastCompletedPageIndex = null;
allPages.forEach((page, index) => {
if (page.completed) {
lastCompletedPageIndex = index;
}
});
if (lastCompletedPageIndex === null) {
// always is at least the first item...
lastCompletedPageIndex = 0;
}
else if (lastCompletedPageIndex + 1 < allPages.length) {
lastCompletedPageIndex = lastCompletedPageIndex + 1;
}
this.currentPage = allPages[lastCompletedPageIndex];
}
/**
* Finds the first page in the collection of pages and makes that page the
* current/active page.
*
* @memberof WizardNavigationService
*/
setFirstPageCurrent() {
this.currentPage = this.pageCollection.pagesAsArray[0];
}
/**
* Updates the stepnav on the left side of the wizard when pages are dynamically
* added or removed from the collection of pages.
*
* @memberof WizardNavigationService
*/
updateNavigation() {
let toSetCurrent;
this.pageCollection.updateCompletedStates();
const currentPageRemoved = this.pageCollection.pagesAsArray.indexOf(this.currentPage) < 0;
if (currentPageRemoved) {
toSetCurrent = this.pageCollection.findFirstIncompletePage();
this.currentPage = toSetCurrent;
}
}
}
WizardNavigationService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: WizardNavigationService, deps: [{ token: i1.PageCollectionService }, { token: i2.ButtonHubService }], target: i0.ɵɵFactoryTarget.Injectable });
WizardNavigationService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: WizardNavigationService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: WizardNavigationService, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i1.PageCollectionService }, { type: i2.ButtonHubService }]; } });
//# 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All Rights Reserved.\n * This software is released under MIT license.\n * The full license information can be found in LICENSE in the root directory of this project.\n */\n\nimport { Injectable, OnDestroy, TemplateRef } from '@angular/core';\nimport { Observable, Subject } from 'rxjs';\nimport { Subscription } from 'rxjs';\n\nimport { ClrWizardPage } from '../wizard-page';\nimport { ButtonHubService } from './button-hub.service';\nimport { PageCollectionService } from './page-collection.service';\n\n/**\n * Performs navigation functions for a wizard and manages the current page. Presented as a\n * separate service to encapsulate the behavior of navigating and completing the wizard so\n * that it can be shared across the wizard and its sub-components.\n *\n * The easiest way to access the navigation service is there a reference on your wizard. The\n * Following example would allow you to access your instance of the wizard from your host\n * component and thereby access the navigation service via YourHostComponent.wizard.navService.\n *\n * @example\n * <clr-wizard #wizard ...>\n *\n * @example\n * export class YourHostComponent {\n *   @ViewChild(\"wizard\") wizard: Wizard;\n *   ...\n * }\n *\n */\n@Injectable()\nexport class WizardNavigationService implements OnDestroy {\n  /**\n   * Is notified when a previous button is clicked in the wizard. Performs checks\n   * before alerting the current page of the button click. Enacts navigation to\n   * the previous page if not overridden at the page level.\n   *\n   * @memberof WizardNavigationService\n   */\n  previousButtonSubscription: Subscription;\n\n  /**\n   * Is notified when a Next button is clicked in the wizard.\n   *\n   * @memberof WizardNavigationService\n   */\n  nextButtonSubscription: Subscription;\n\n  /**\n   * Is notified when a danger button is clicked in the wizard.\n   *\n   * @memberof WizardNavigationService\n   */\n  dangerButtonSubscription: Subscription;\n\n  /**\n   * Is notified when a  finish button is clicked in the wizard.\n   *\n   * @memberof WizardNavigationService\n   */\n  finishButtonSubscription: Subscription;\n\n  /**\n   * Is notified when a Custom button is clicked in the wizard.\n   *\n   * @memberof WizardNavigationService\n   */\n  customButtonSubscription: Subscription;\n\n  /**\n   * Is notified when a Cancel button is clicked in the wizard. Notifies the wizard,\n   * which handles all cancel functionality, if cancel is not overridden at the page\n   * level.\n   *\n   * @memberof WizardNavigationService\n   */\n  cancelButtonSubscription: Subscription;\n\n  /**\n   * Resets navigation to make the first page current when the page collection service\n   * emits an event notifying WizardNavigationService that it has reset all pages\n   * to their pristine, incomplete state.\n   *\n   * @memberof WizardNavigationService\n   */\n  pagesResetSubscription: Subscription;\n\n  /**\n   * A Boolean flag used by the ClrWizardPage to avoid a race condition when pages are\n   * loading and there is no current page defined.\n   *\n   * @memberof WizardNavigationService\n   */\n  navServiceLoaded = false;\n\n  /**\n   * A boolean flag shared across the Wizard subcomponents that follows the value\n   * of the Wizard.forceForward (clrWizardForceForwardNavigation) input. When true,\n   * navigating backwards in the stepnav menu will reset any skipped pages' completed\n   * state to false.\n   *\n   * This is useful when a wizard executes validation on a page-by-page basis when\n   * the next button is clicked.\n   *\n   * @memberof WizardNavigationService\n   */\n  forceForwardNavigation = false;\n\n  /**\n   * A boolean flag shared across the Wizard subcomponents that follows the value\n   * of the Wizard.stopCancel (clrWizardPreventDefaultCancel) input. When true, the cancel\n   * routine is subverted and must be reinstated in the host component calling Wizard.close()\n   * at some point.\n   *\n   * @memberof WizardNavigationService\n   */\n  wizardHasAltCancel = false;\n\n  /**\n   * A boolean flag shared across the Wizard subcomponents that follows the value\n   * of the Wizard.stopNext (clrWizardPreventDefaultNext) input. When true, the next and finish\n   * routines are subverted and must be reinstated in the host component calling Wizard.next(),\n   * Wizard.forceNext(), Wizard.finish(), or Wizard.forceFinish().\n   *\n   * @memberof WizardNavigationService\n   */\n  wizardHasAltNext = false;\n\n  /**\n   * A boolean flag shared across the Wizard subcomponents that follows the value\n   * of the Wizard.stopNavigation (clrWizardPreventNavigation) input. When true, all\n   * navigational elements in the wizard are disabled.\n   *\n   * This is intended to freeze the wizard in place. Events are not fired so this is\n   * not a way to implement alternate functionality for navigation.\n   *\n   * @memberof WizardNavigationService\n   */\n  wizardStopNavigation = false;\n\n  /**\n   * A boolean flag shared with the stepnav items that prevents user clicks on\n   * stepnav items from navigating the wizard.\n   *\n   * @memberof WizardNavigationService\n   */\n  wizardDisableStepnav = false;\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  private _currentPage: ClrWizardPage;\n\n  /**\n   *\n   * @memberof WizardNavigationService\n   */\n  private _currentChanged = new Subject<ClrWizardPage>();\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  private _movedToNextPage = new Subject<boolean>();\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  private _wizardFinished = new Subject<boolean>();\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  private _movedToPreviousPage = new Subject<boolean>();\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  private _cancelWizard = new Subject<any>();\n\n  /**\n   * Creates an instance of WizardNavigationService. Also sets up subscriptions\n   * that listen to the button service to determine when a button has been clicked\n   * in the wizard. Is also responsible for taking action when the page collection\n   * requests that navigation be reset to its pristine state.\n   *\n   * @memberof WizardNavigationService\n   */\n  constructor(public pageCollection: PageCollectionService, public buttonService: ButtonHubService) {\n    this.previousButtonSubscription = this.buttonService.previousBtnClicked.subscribe(() => {\n      const currentPage = this.currentPage;\n      if (this.currentPageIsFirst || currentPage.previousStepDisabled) {\n        return;\n      }\n      currentPage.previousButtonClicked.emit(currentPage);\n      if (!currentPage.preventDefault) {\n        this.previous();\n      }\n    });\n\n    this.nextButtonSubscription = this.buttonService.nextBtnClicked.subscribe(() => {\n      this.checkAndCommitCurrentPage('next');\n    });\n\n    this.dangerButtonSubscription = this.buttonService.dangerBtnClicked.subscribe(() => {\n      this.checkAndCommitCurrentPage('danger');\n    });\n\n    this.finishButtonSubscription = this.buttonService.finishBtnClicked.subscribe(() => {\n      this.checkAndCommitCurrentPage('finish');\n    });\n\n    this.customButtonSubscription = this.buttonService.customBtnClicked.subscribe((type: string) => {\n      if (!this.wizardStopNavigation) {\n        this.currentPage.customButtonClicked.emit(type);\n      }\n    });\n\n    this.cancelButtonSubscription = this.buttonService.cancelBtnClicked.subscribe(() => {\n      if (this.wizardStopNavigation) {\n        return;\n      }\n\n      if (this.currentPage.preventDefault) {\n        this.currentPage.pageOnCancel.emit(this.currentPage);\n      } else {\n        this.cancel();\n      }\n    });\n\n    this.pagesResetSubscription = this.pageCollection.pagesReset.subscribe(() => {\n      this.setFirstPageCurrent();\n    });\n  }\n\n  /**\n   * An Observable that is predominantly used amongst the subcomponents and services\n   * of the wizard. It is recommended that users listen to the ClrWizardPage.onLoad\n   * (clrWizardPageOnLoad) output instead of this Observable.\n   *\n   * @memberof WizardNavigationService\n   */\n  get currentPageChanged(): Observable<ClrWizardPage> {\n    // TODO: MAKE SURE EXTERNAL OUTPUTS SAY 'CHANGE' NOT 'CHANGED'\n    // A BREAKING CHANGE SO AWAITING MINOR RELEASE\n    return this._currentChanged.asObservable();\n  }\n\n  /**\n   * @memberof WizardNavigationService\n   */\n  get currentPageTitle(): TemplateRef<any> {\n    // when the querylist of pages is empty. this is the first place it fails...\n    if (!this.currentPage) {\n      return null;\n    }\n    return this.currentPage.title;\n  }\n\n  /**\n   * Returns a Boolean that tells you whether or not the current page is the first\n   * page in the Wizard.\n   *\n   * This is helpful for determining whether a page is navigable.\n   *\n   * @memberof WizardNavigationService\n   */\n  get currentPageIsFirst(): boolean {\n    return this.pageCollection.firstPage === this.currentPage;\n  }\n\n  /**\n   * Returns a Boolean that tells you whether or not the current page is the\n   * last page in the Wizard.\n   *\n   * This is used to determine which buttons should display in the wizard footer.\n   *\n   * @memberof WizardNavigationService\n   */\n  get currentPageIsLast(): boolean {\n    return this.pageCollection.lastPage === this.currentPage;\n  }\n\n  /**\n   * Returns the ClrWizardPage object of the current page or null.\n   *\n   * @memberof WizardNavigationService\n   */\n  get currentPage(): ClrWizardPage {\n    if (!this._currentPage) {\n      return null;\n    }\n    return this._currentPage;\n  }\n\n  /**\n   * Accepts a ClrWizardPage object, since that object to be the current/active\n   * page in the wizard, and emits the ClrWizardPage.onLoad (clrWizardPageOnLoad)\n   * event for that page.\n   *\n   * Note that all of this work is bypassed if the ClrWizardPage object is already\n   * the current page.\n   *\n   * @memberof WizardNavigationService\n   */\n  set currentPage(page: ClrWizardPage) {\n    if (this._currentPage !== page && !this.wizardStopNavigation) {\n      this._currentPage = page;\n      page.onLoad.emit(page.id);\n      this._currentChanged.next(page);\n    }\n  }\n\n  /**\n   * An observable used internally to alert the wizard that forward navigation\n   * has occurred. It is recommended that you use the Wizard.onMoveNext\n   * (clrWizardOnNext) output instead of this one.\n   *\n   * @memberof WizardNavigationService\n   */\n  get movedToNextPage(): Observable<boolean> {\n    return this._movedToNextPage.asObservable();\n  }\n\n  /**\n   * An observable used internally to alert the wizard that the nav service\n   * has approved completion of the wizard.\n   *\n   * It is recommended that you use the Wizard.wizardFinished (clrWizardOnFinish)\n   * output instead of this one.\n   *\n   * @memberof WizardNavigationService\n   */\n  get wizardFinished(): Observable<boolean> {\n    return this._wizardFinished.asObservable();\n  }\n\n  /**\n   * Notifies the wizard when backwards navigation has occurred via the\n   * previous button.\n   *\n   * @memberof WizardNavigationService\n   */\n  get movedToPreviousPage(): Observable<boolean> {\n    return this._movedToPrevious