source: trip-planner-front/node_modules/@angular/cdk/fesm2015/stepper.js@ 6a3a178

import { FocusKeyManager } from '@angular/cdk/a11y';
import { Directionality, BidiModule } from '@angular/cdk/bidi';
import { coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';
import { hasModifierKey, SPACE, ENTER } from '@angular/cdk/keycodes';
import { DOCUMENT } from '@angular/common';
import { Directive, ElementRef, TemplateRef, InjectionToken, EventEmitter, Component, ViewEncapsulation, ChangeDetectionStrategy, Inject, forwardRef, Optional, ContentChild, ViewChild, Input, Output, QueryList, ChangeDetectorRef, ContentChildren, HostListener, NgModule } from '@angular/core';
import { _getFocusedElementPierceShadowDom } from '@angular/cdk/platform';
import { Subject, of } from 'rxjs';
import { startWith, takeUntil } from 'rxjs/operators';

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
class CdkStepHeader {
    constructor(_elementRef) {
        this._elementRef = _elementRef;
    }
    /** Focuses the step header. */
    focus() {
        this._elementRef.nativeElement.focus();
    }
}
CdkStepHeader.decorators = [
    { type: Directive, args: [{
                selector: '[cdkStepHeader]',
                host: {
                    'role': 'tab',
                },
            },] }
];
CdkStepHeader.ctorParameters = () => [
    { type: ElementRef }
];

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
class CdkStepLabel {
    constructor(/** @docs-private */ template) {
        this.template = template;
    }
}
CdkStepLabel.decorators = [
    { type: Directive, args: [{
                selector: '[cdkStepLabel]',
            },] }
];
CdkStepLabel.ctorParameters = () => [
    { type: TemplateRef }
];

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** Used to generate unique ID for each stepper component. */
let nextId = 0;
/** Change event emitted on selection changes. */
class StepperSelectionEvent {
}
/** Enum to represent the different states of the steps. */
const STEP_STATE = {
    NUMBER: 'number',
    EDIT: 'edit',
    DONE: 'done',
    ERROR: 'error'
};
/** InjectionToken that can be used to specify the global stepper options. */
const STEPPER_GLOBAL_OPTIONS = new InjectionToken('STEPPER_GLOBAL_OPTIONS');
class CdkStep {
    constructor(_stepper, stepperOptions) {
        this._stepper = _stepper;
        /** Whether user has attempted to move away from the step. */
        this.interacted = false;
        /** Emits when the user has attempted to move away from the step. */
        this.interactedStream = new EventEmitter();
        this._editable = true;
        this._optional = false;
        this._completedOverride = null;
        this._customError = null;
        this._stepperOptions = stepperOptions ? stepperOptions : {};
        this._displayDefaultIndicatorType = this._stepperOptions.displayDefaultIndicatorType !== false;
    }
    /** Whether the user can return to this step once it has been marked as completed. */
    get editable() {
        return this._editable;
    }
    set editable(value) {
        this._editable = coerceBooleanProperty(value);
    }
    /** Whether the completion of step is optional. */
    get optional() {
        return this._optional;
    }
    set optional(value) {
        this._optional = coerceBooleanProperty(value);
    }
    /** Whether step is marked as completed. */
    get completed() {
        return this._completedOverride == null ? this._getDefaultCompleted() : this._completedOverride;
    }
    set completed(value) {
        this._completedOverride = coerceBooleanProperty(value);
    }
    _getDefaultCompleted() {
        return this.stepControl ? this.stepControl.valid && this.interacted : this.interacted;
    }
    /** Whether step has an error. */
    get hasError() {
        return this._customError == null ? this._getDefaultError() : this._customError;
    }
    set hasError(value) {
        this._customError = coerceBooleanProperty(value);
    }
    _getDefaultError() {
        return this.stepControl && this.stepControl.invalid && this.interacted;
    }
    /** Selects this step component. */
    select() {
        this._stepper.selected = this;
    }
    /** Resets the step to its initial state. Note that this includes resetting form data. */
    reset() {
        this.interacted = false;
        if (this._completedOverride != null) {
            this._completedOverride = false;
        }
        if (this._customError != null) {
            this._customError = false;
        }
        if (this.stepControl) {
            this.stepControl.reset();
        }
    }
    ngOnChanges() {
        // Since basically all inputs of the MatStep get proxied through the view down to the
        // underlying MatStepHeader, we have to make sure that change detection runs correctly.
        this._stepper._stateChanged();
    }
    _markAsInteracted() {
        if (!this.interacted) {
            this.interacted = true;
            this.interactedStream.emit(this);
        }
    }
    /** Determines whether the error state can be shown. */
    _showError() {
        var _a;
        // We want to show the error state either if the user opted into/out of it using the
        // global options, or if they've explicitly set it through the `hasError` input.
        return (_a = this._stepperOptions.showError) !== null && _a !== void 0 ? _a : this._customError != null;
    }
}
CdkStep.decorators = [
    { type: Component, args: [{
                selector: 'cdk-step',
                exportAs: 'cdkStep',
                template: '<ng-template><ng-content></ng-content></ng-template>',
                encapsulation: ViewEncapsulation.None,
                changeDetection: ChangeDetectionStrategy.OnPush
            },] }
];
CdkStep.ctorParameters = () => [
    { type: CdkStepper, decorators: [{ type: Inject, args: [forwardRef(() => CdkStepper),] }] },
    { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [STEPPER_GLOBAL_OPTIONS,] }] }
];
CdkStep.propDecorators = {
    stepLabel: [{ type: ContentChild, args: [CdkStepLabel,] }],
    content: [{ type: ViewChild, args: [TemplateRef, { static: true },] }],
    stepControl: [{ type: Input }],
    interactedStream: [{ type: Output, args: ['interacted',] }],
    label: [{ type: Input }],
    errorMessage: [{ type: Input }],
    ariaLabel: [{ type: Input, args: ['aria-label',] }],
    ariaLabelledby: [{ type: Input, args: ['aria-labelledby',] }],
    state: [{ type: Input }],
    editable: [{ type: Input }],
    optional: [{ type: Input }],
    completed: [{ type: Input }],
    hasError: [{ type: Input }]
};
class CdkStepper {
    constructor(_dir, _changeDetectorRef, _elementRef, 
    /**
     * @deprecated No longer in use, to be removed.
     * @breaking-change 13.0.0
     */
    _document) {
        this._dir = _dir;
        this._changeDetectorRef = _changeDetectorRef;
        this._elementRef = _elementRef;
        /** Emits when the component is destroyed. */
        this._destroyed = new Subject();
        /** Steps that belong to the current stepper, excluding ones from nested steppers. */
        this.steps = new QueryList();
        /** List of step headers sorted based on their DOM order. */
        this._sortedHeaders = new QueryList();
        this._linear = false;
        this._selectedIndex = 0;
        /** Event emitted when the selected step has changed. */
        this.selectionChange = new EventEmitter();
        /**
         * @deprecated To be turned into a private property. Use `orientation` instead.
         * @breaking-change 13.0.0
         */
        this._orientation = 'horizontal';
        this._groupId = nextId++;
    }
    /** Whether the validity of previous steps should be checked or not. */
    get linear() {
        return this._linear;
    }
    set linear(value) {
        this._linear = coerceBooleanProperty(value);
    }
    /** The index of the selected step. */
    get selectedIndex() {
        return this._selectedIndex;
    }
    set selectedIndex(index) {
        var _a;
        const newIndex = coerceNumberProperty(index);
        if (this.steps && this._steps) {
            // Ensure that the index can't be out of bounds.
            if (!this._isValidIndex(index) && (typeof ngDevMode === 'undefined' || ngDevMode)) {
                throw Error('cdkStepper: Cannot assign out-of-bounds value to `selectedIndex`.');
            }
            (_a = this.selected) === null || _a === void 0 ? void 0 : _a._markAsInteracted();
            if (this._selectedIndex !== newIndex && !this._anyControlsInvalidOrPending(newIndex) &&
                (newIndex >= this._selectedIndex || this.steps.toArray()[newIndex].editable)) {
                this._updateSelectedItemIndex(index);
            }
        }
        else {
            this._selectedIndex = newIndex;
        }
    }
    /** The step that is selected. */
    get selected() {
        return this.steps ? this.steps.toArray()[this.selectedIndex] : undefined;
    }
    set selected(step) {
        this.selectedIndex = (step && this.steps) ? this.steps.toArray().indexOf(step) : -1;
    }
    /** Orientation of the stepper. */
    get orientation() { return this._orientation; }
    set orientation(value) {
        // This is a protected method so that `MatSteppter` can hook into it.
        this._orientation = value;
        if (this._keyManager) {
            this._keyManager.withVerticalOrientation(value === 'vertical');
        }
    }
    ngAfterContentInit() {
        this._steps.changes
            .pipe(startWith(this._steps), takeUntil(this._destroyed))
            .subscribe((steps) => {
            this.steps.reset(steps.filter(step => step._stepper === this));
            this.steps.notifyOnChanges();
        });
    }
    ngAfterViewInit() {
        // If the step headers are defined outside of the `ngFor` that renders the steps, like in the
        // Material stepper, they won't appear in the `QueryList` in the same order as they're
        // rendered in the DOM which will lead to incorrect keyboard navigation. We need to sort
        // them manually to ensure that they're correct. Alternatively, we can change the Material
        // template to inline the headers in the `ngFor`, but that'll result in a lot of
        // code duplciation. See #23539.
        this._stepHeader.changes
            .pipe(startWith(this._stepHeader), takeUntil(this._destroyed))
            .subscribe((headers) => {
            this._sortedHeaders.reset(headers.toArray().sort((a, b) => {
                const documentPosition = a._elementRef.nativeElement.compareDocumentPosition(b._elementRef.nativeElement);
                // `compareDocumentPosition` returns a bitmask so we have to use a bitwise operator.
                // https://developer.mozilla.org/en-US/docs/Web/API/Node/compareDocumentPosition
                // tslint:disable-next-line:no-bitwise
                return documentPosition & Node.DOCUMENT_POSITION_FOLLOWING ? -1 : 1;
            }));
            this._sortedHeaders.notifyOnChanges();
        });
        // Note that while the step headers are content children by default, any components that
        // extend this one might have them as view children. We initialize the keyboard handling in
        // AfterViewInit so we're guaranteed for both view and content children to be defined.
        this._keyManager = new FocusKeyManager(this._sortedHeaders)
            .withWrap()
            .withHomeAndEnd()
            .withVerticalOrientation(this._orientation === 'vertical');
        (this._dir ? this._dir.change : of())
            .pipe(startWith(this._layoutDirection()), takeUntil(this._destroyed))
            .subscribe(direction => this._keyManager.withHorizontalOrientation(direction));
        this._keyManager.updateActiveItem(this._selectedIndex);
        // No need to `takeUntil` here, because we're the ones destroying `steps`.
        this.steps.changes.subscribe(() => {
            if (!this.selected) {
                this._selectedIndex = Math.max(this._selectedIndex - 1, 0);
            }
        });
        // The logic which asserts that the selected index is within bounds doesn't run before the
        // steps are initialized, because we don't how many steps there are yet so we may have an
        // invalid index on init. If that's the case, auto-correct to the default so we don't throw.
        if (!this._isValidIndex(this._selectedIndex)) {
            this._selectedIndex = 0;
        }
    }
    ngOnDestroy() {
        this.steps.destroy();
        this._sortedHeaders.destroy();
        this._destroyed.next();
        this._destroyed.complete();
    }
    /** Selects and focuses the next step in list. */
    next() {
        this.selectedIndex = Math.min(this._selectedIndex + 1, this.steps.length - 1);
    }
    /** Selects and focuses the previous step in list. */
    previous() {
        this.selectedIndex = Math.max(this._selectedIndex - 1, 0);
    }
    /** Resets the stepper to its initial state. Note that this includes clearing form data. */
    reset() {
        this._updateSelectedItemIndex(0);
        this.steps.forEach(step => step.reset());
        this._stateChanged();
    }
    /** Returns a unique id for each step label element. */
    _getStepLabelId(i) {
        return `cdk-step-label-${this._groupId}-${i}`;
    }
    /** Returns unique id for each step content element. */
    _getStepContentId(i) {
        return `cdk-step-content-${this._groupId}-${i}`;
    }
    /** Marks the component to be change detected. */
    _stateChanged() {
        this._changeDetectorRef.markForCheck();
    }
    /** Returns position state of the step with the given index. */
    _getAnimationDirection(index) {
        const position = index - this._selectedIndex;
        if (position < 0) {
            return this._layoutDirection() === 'rtl' ? 'next' : 'previous';
        }
        else if (position > 0) {
            return this._layoutDirection() === 'rtl' ? 'previous' : 'next';
        }
        return 'current';
    }
    /** Returns the type of icon to be displayed. */
    _getIndicatorType(index, state = STEP_STATE.NUMBER) {
        const step = this.steps.toArray()[index];
        const isCurrentStep = this._isCurrentStep(index);
        return step._displayDefaultIndicatorType ? this._getDefaultIndicatorLogic(step, isCurrentStep) :
            this._getGuidelineLogic(step, isCurrentStep, state);
    }
    _getDefaultIndicatorLogic(step, isCurrentStep) {
        if (step._showError() && step.hasError && !isCurrentStep) {
            return STEP_STATE.ERROR;
        }
        else if (!step.completed || isCurrentStep) {
            return STEP_STATE.NUMBER;
        }
        else {
            return step.editable ? STEP_STATE.EDIT : STEP_STATE.DONE;
        }
    }
    _getGuidelineLogic(step, isCurrentStep, state = STEP_STATE.NUMBER) {
        if (step._showError() && step.hasError && !isCurrentStep) {
            return STEP_STATE.ERROR;
        }
        else if (step.completed && !isCurrentStep) {
            return STEP_STATE.DONE;
        }
        else if (step.completed && isCurrentStep) {
            return state;
        }
        else if (step.editable && isCurrentStep) {
            return STEP_STATE.EDIT;
        }
        else {
            return state;
        }
    }
    _isCurrentStep(index) {
        return this._selectedIndex === index;
    }
    /** Returns the index of the currently-focused step header. */
    _getFocusIndex() {
        return this._keyManager ? this._keyManager.activeItemIndex : this._selectedIndex;
    }
    _updateSelectedItemIndex(newIndex) {
        const stepsArray = this.steps.toArray();
        this.selectionChange.emit({
            selectedIndex: newIndex,
            previouslySelectedIndex: this._selectedIndex,
            selectedStep: stepsArray[newIndex],
            previouslySelectedStep: stepsArray[this._selectedIndex],
        });
        // If focus is inside the stepper, move it to the next header, otherwise it may become
        // lost when the active step content is hidden. We can't be more granular with the check
        // (e.g. checking whether focus is inside the active step), because we don't have a
        // reference to the elements that are rendering out the content.
        this._containsFocus() ? this._keyManager.setActiveItem(newIndex) :
            this._keyManager.updateActiveItem(newIndex);
        this._selectedIndex = newIndex;
        this._stateChanged();
    }
    _onKeydown(event) {
        const hasModifier = hasModifierKey(event);
        const keyCode = event.keyCode;
        const manager = this._keyManager;
        if (manager.activeItemIndex != null && !hasModifier &&
            (keyCode === SPACE || keyCode === ENTER)) {
            this.selectedIndex = manager.activeItemIndex;
            event.preventDefault();
        }
        else {
            manager.onKeydown(event);
        }
    }
    _anyControlsInvalidOrPending(index) {
        if (this._linear && index >= 0) {
            return this.steps.toArray().slice(0, index).some(step => {
                const control = step.stepControl;
                const isIncomplete = control ? (control.invalid || control.pending || !step.interacted) : !step.completed;
                return isIncomplete && !step.optional && !step._completedOverride;
            });
        }
        return false;
    }
    _layoutDirection() {
        return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';
    }
    /** Checks whether the stepper contains the focused element. */
    _containsFocus() {
        const stepperElement = this._elementRef.nativeElement;
        const focusedElement = _getFocusedElementPierceShadowDom();
        return stepperElement === focusedElement || stepperElement.contains(focusedElement);
    }
    /** Checks whether the passed-in index is a valid step index. */
    _isValidIndex(index) {
        return index > -1 && (!this.steps || index < this.steps.length);
    }
}
CdkStepper.decorators = [
    { type: Directive, args: [{
                selector: '[cdkStepper]',
                exportAs: 'cdkStepper',
            },] }
];
CdkStepper.ctorParameters = () => [
    { type: Directionality, decorators: [{ type: Optional }] },
    { type: ChangeDetectorRef },
    { type: ElementRef },
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
CdkStepper.propDecorators = {
    _steps: [{ type: ContentChildren, args: [CdkStep, { descendants: true },] }],
    _stepHeader: [{ type: ContentChildren, args: [CdkStepHeader, { descendants: true },] }],
    linear: [{ type: Input }],
    selectedIndex: [{ type: Input }],
    selected: [{ type: Input }],
    selectionChange: [{ type: Output }],
    orientation: [{ type: Input }]
};

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** Button that moves to the next step in a stepper workflow. */
class CdkStepperNext {
    constructor(_stepper) {
        this._stepper = _stepper;
        /** Type of the next button. Defaults to "submit" if not specified. */
        this.type = 'submit';
    }
    // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
    // In Ivy the `host` bindings will be merged when this class is extended, whereas in
    // ViewEngine they're overwritten.
    // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
    // tslint:disable-next-line:no-host-decorator-in-concrete
    _handleClick() {
        this._stepper.next();
    }
}
CdkStepperNext.decorators = [
    { type: Directive, args: [{
                selector: 'button[cdkStepperNext]',
                host: {
                    '[type]': 'type',
                }
            },] }
];
CdkStepperNext.ctorParameters = () => [
    { type: CdkStepper }
];
CdkStepperNext.propDecorators = {
    type: [{ type: Input }],
    _handleClick: [{ type: HostListener, args: ['click',] }]
};
/** Button that moves to the previous step in a stepper workflow. */
class CdkStepperPrevious {
    constructor(_stepper) {
        this._stepper = _stepper;
        /** Type of the previous button. Defaults to "button" if not specified. */
        this.type = 'button';
    }
    // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
    // In Ivy the `host` bindings will be merged when this class is extended, whereas in
    // ViewEngine they're overwritten.
    // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
    // tslint:disable-next-line:no-host-decorator-in-concrete
    _handleClick() {
        this._stepper.previous();
    }
}
CdkStepperPrevious.decorators = [
    { type: Directive, args: [{
                selector: 'button[cdkStepperPrevious]',
                host: {
                    '[type]': 'type',
                }
            },] }
];
CdkStepperPrevious.ctorParameters = () => [
    { type: CdkStepper }
];
CdkStepperPrevious.propDecorators = {
    type: [{ type: Input }],
    _handleClick: [{ type: HostListener, args: ['click',] }]
};

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
class CdkStepperModule {
}
CdkStepperModule.decorators = [
    { type: NgModule, args: [{
                imports: [BidiModule],
                exports: [
                    CdkStep,
                    CdkStepper,
                    CdkStepHeader,
                    CdkStepLabel,
                    CdkStepperNext,
                    CdkStepperPrevious,
                ],
                declarations: [
                    CdkStep,
                    CdkStepper,
                    CdkStepHeader,
                    CdkStepLabel,
                    CdkStepperNext,
                    CdkStepperPrevious,
                ]
            },] }
];

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Generated bundle index. Do not edit.
 */

export { CdkStep, CdkStepHeader, CdkStepLabel, CdkStepper, CdkStepperModule, CdkStepperNext, CdkStepperPrevious, STEPPER_GLOBAL_OPTIONS, STEP_STATE, StepperSelectionEvent };
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