@angular/material
Version:
Angular Material
1,073 lines (1,070 loc) • 62.9 kB
JavaScript
import { Overlay, CdkConnectedOverlay, OverlayModule } from '@angular/cdk/overlay';
import { CommonModule } from '@angular/common';
import { InjectionToken, Directive, EventEmitter, isDevMode, Component, ViewEncapsulation, ChangeDetectionStrategy, ChangeDetectorRef, NgZone, ElementRef, Optional, Self, Attribute, Inject, ViewChild, ContentChildren, Input, ContentChild, Output, NgModule } from '@angular/core';
import { mixinDisableRipple, mixinTabIndex, mixinDisabled, mixinErrorState, _countGroupLabelsBeforeOption, _getOptionScrollPosition, MAT_OPTION_PARENT_COMPONENT, ErrorStateMatcher, MatOption, MatOptgroup, MatOptionModule, MatCommonModule } from '@angular/material/core';
import { MatFormFieldControl, MatFormField, MatFormFieldModule } from '@angular/material/form-field';
import { __extends, __spread } from 'tslib';
import { ActiveDescendantKeyManager, LiveAnnouncer } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';
import { SelectionModel } from '@angular/cdk/collections';
import { DOWN_ARROW, UP_ARROW, LEFT_ARROW, RIGHT_ARROW, ENTER, SPACE, hasModifierKey, HOME, END, A } from '@angular/cdk/keycodes';
import { ViewportRuler } from '@angular/cdk/scrolling';
import { NgForm, FormGroupDirective, NgControl } from '@angular/forms';
import { Subject, defer, merge } from 'rxjs';
import { startWith, switchMap, take, filter, map, distinctUntilChanged, takeUntil } from 'rxjs/operators';
import { trigger, transition, query, animateChild, state, style, animate } from '@angular/animations';
/**
* @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
*/
/**
* The following are all the animations for the mat-select component, with each
* const containing the metadata for one animation.
*
* The values below match the implementation of the AngularJS Material mat-select animation.
* @docs-private
*/
var matSelectAnimations = {
/**
* This animation ensures the select's overlay panel animation (transformPanel) is called when
* closing the select.
* This is needed due to https://github.com/angular/angular/issues/23302
*/
transformPanelWrap: trigger('transformPanelWrap', [
transition('* => void', query('@transformPanel', [animateChild()], { optional: true }))
]),
/**
* This animation transforms the select's overlay panel on and off the page.
*
* When the panel is attached to the DOM, it expands its width by the amount of padding, scales it
* up to 100% on the Y axis, fades in its border, and translates slightly up and to the
* side to ensure the option text correctly overlaps the trigger text.
*
* When the panel is removed from the DOM, it simply fades out linearly.
*/
transformPanel: trigger('transformPanel', [
state('void', style({
transform: 'scaleY(0.8)',
minWidth: '100%',
opacity: 0
})),
state('showing', style({
opacity: 1,
minWidth: 'calc(100% + 32px)',
transform: 'scaleY(1)'
})),
state('showing-multiple', style({
opacity: 1,
minWidth: 'calc(100% + 64px)',
transform: 'scaleY(1)'
})),
transition('void => *', animate('120ms cubic-bezier(0, 0, 0.2, 1)')),
transition('* => void', animate('100ms 25ms linear', style({ opacity: 0 })))
])
};
/**
* @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
*/
/**
* Returns an exception to be thrown when attempting to change a select's `multiple` option
* after initialization.
* @docs-private
*/
function getMatSelectDynamicMultipleError() {
return Error('Cannot change `multiple` mode of select after initialization.');
}
/**
* Returns an exception to be thrown when attempting to assign a non-array value to a select
* in `multiple` mode. Note that `undefined` and `null` are still valid values to allow for
* resetting the value.
* @docs-private
*/
function getMatSelectNonArrayValueError() {
return Error('Value must be an array in multiple-selection mode.');
}
/**
* Returns an exception to be thrown when assigning a non-function value to the comparator
* used to determine if a value corresponds to an option. Note that whether the function
* actually takes two values and returns a boolean is not checked.
*/
function getMatSelectNonFunctionValueError() {
return Error('`compareWith` must be a function.');
}
/**
* @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
*/
var nextUniqueId = 0;
/**
* The following style constants are necessary to save here in order
* to properly calculate the alignment of the selected option over
* the trigger element.
*/
/** The max height of the select's overlay panel */
var SELECT_PANEL_MAX_HEIGHT = 256;
/** The panel's padding on the x-axis */
var SELECT_PANEL_PADDING_X = 16;
/** The panel's x axis padding if it is indented (e.g. there is an option group). */
var SELECT_PANEL_INDENT_PADDING_X = SELECT_PANEL_PADDING_X * 2;
/** The height of the select items in `em` units. */
var SELECT_ITEM_HEIGHT_EM = 3;
// TODO(josephperrott): Revert to a constant after 2018 spec updates are fully merged.
/**
* Distance between the panel edge and the option text in
* multi-selection mode.
*
* Calculated as:
* (SELECT_PANEL_PADDING_X * 1.5) + 16 = 40
* The padding is multiplied by 1.5 because the checkbox's margin is half the padding.
* The checkbox width is 16px.
*/
var SELECT_MULTIPLE_PANEL_PADDING_X = SELECT_PANEL_PADDING_X * 1.5 + 16;
/**
* The select panel will only "fit" inside the viewport if it is positioned at
* this value or more away from the viewport boundary.
*/
var SELECT_PANEL_VIEWPORT_PADDING = 8;
/** Injection token that determines the scroll handling while a select is open. */
var MAT_SELECT_SCROLL_STRATEGY = new InjectionToken('mat-select-scroll-strategy');
/** @docs-private */
function MAT_SELECT_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {
return function () { return overlay.scrollStrategies.reposition(); };
}
/** @docs-private */
var MAT_SELECT_SCROLL_STRATEGY_PROVIDER = {
provide: MAT_SELECT_SCROLL_STRATEGY,
deps: [Overlay],
useFactory: MAT_SELECT_SCROLL_STRATEGY_PROVIDER_FACTORY,
};
/** Change event object that is emitted when the select value has changed. */
var MatSelectChange = /** @class */ (function () {
function MatSelectChange(
/** Reference to the select that emitted the change event. */
source,
/** Current value of the select that emitted the event. */
value) {
this.source = source;
this.value = value;
}
return MatSelectChange;
}());
// Boilerplate for applying mixins to MatSelect.
/** @docs-private */
var MatSelectBase = /** @class */ (function () {
function MatSelectBase(_elementRef, _defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl) {
this._elementRef = _elementRef;
this._defaultErrorStateMatcher = _defaultErrorStateMatcher;
this._parentForm = _parentForm;
this._parentFormGroup = _parentFormGroup;
this.ngControl = ngControl;
}
return MatSelectBase;
}());
var _MatSelectMixinBase = mixinDisableRipple(mixinTabIndex(mixinDisabled(mixinErrorState(MatSelectBase))));
/**
* Allows the user to customize the trigger that is displayed when the select has a value.
*/
var MatSelectTrigger = /** @class */ (function () {
function MatSelectTrigger() {
}
MatSelectTrigger.decorators = [
{ type: Directive, args: [{
selector: 'mat-select-trigger'
},] }
];
return MatSelectTrigger;
}());
var MatSelect = /** @class */ (function (_super) {
__extends(MatSelect, _super);
function MatSelect(_viewportRuler, _changeDetectorRef, _ngZone, _defaultErrorStateMatcher, elementRef, _dir, _parentForm, _parentFormGroup, _parentFormField, ngControl, tabIndex, scrollStrategyFactory, _liveAnnouncer) {
var _this = _super.call(this, elementRef, _defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl) || this;
_this._viewportRuler = _viewportRuler;
_this._changeDetectorRef = _changeDetectorRef;
_this._ngZone = _ngZone;
_this._dir = _dir;
_this._parentFormField = _parentFormField;
_this.ngControl = ngControl;
_this._liveAnnouncer = _liveAnnouncer;
/** Whether or not the overlay panel is open. */
_this._panelOpen = false;
/** Whether filling out the select is required in the form. */
_this._required = false;
/** The scroll position of the overlay panel, calculated to center the selected option. */
_this._scrollTop = 0;
/** Whether the component is in multiple selection mode. */
_this._multiple = false;
/** Comparison function to specify which option is displayed. Defaults to object equality. */
_this._compareWith = function (o1, o2) { return o1 === o2; };
/** Unique id for this input. */
_this._uid = "mat-select-" + nextUniqueId++;
/** Emits whenever the component is destroyed. */
_this._destroy = new Subject();
/** The cached font-size of the trigger element. */
_this._triggerFontSize = 0;
/** `View -> model callback called when value changes` */
_this._onChange = function () { };
/** `View -> model callback called when select has been touched` */
_this._onTouched = function () { };
/** The IDs of child options to be passed to the aria-owns attribute. */
_this._optionIds = '';
/** The value of the select panel's transform-origin property. */
_this._transformOrigin = 'top';
/** Emits when the panel element is finished transforming in. */
_this._panelDoneAnimatingStream = new Subject();
/**
* The y-offset of the overlay panel in relation to the trigger's top start corner.
* This must be adjusted to align the selected option text over the trigger text.
* when the panel opens. Will change based on the y-position of the selected option.
*/
_this._offsetY = 0;
/**
* This position config ensures that the top "start" corner of the overlay
* is aligned with with the top "start" of the origin by default (overlapping
* the trigger completely). If the panel cannot fit below the trigger, it
* will fall back to a position above the trigger.
*/
_this._positions = [
{
originX: 'start',
originY: 'top',
overlayX: 'start',
overlayY: 'top',
},
{
originX: 'start',
originY: 'bottom',
overlayX: 'start',
overlayY: 'bottom',
},
];
/** Whether the component is disabling centering of the active option over the trigger. */
_this._disableOptionCentering = false;
_this._focused = false;
/** A name for this control that can be used by `mat-form-field`. */
_this.controlType = 'mat-select';
/** Aria label of the select. If not specified, the placeholder will be used as label. */
_this.ariaLabel = '';
/** Combined stream of all of the child options' change events. */
_this.optionSelectionChanges = defer(function () {
var options = _this.options;
if (options) {
return options.changes.pipe(startWith(options), switchMap(function () { return merge.apply(void 0, __spread(options.map(function (option) { return option.onSelectionChange; }))); }));
}
return _this._ngZone.onStable
.asObservable()
.pipe(take(1), switchMap(function () { return _this.optionSelectionChanges; }));
});
/** Event emitted when the select panel has been toggled. */
_this.openedChange = new EventEmitter();
/** Event emitted when the select has been opened. */
_this._openedStream = _this.openedChange.pipe(filter(function (o) { return o; }), map(function () { }));
/** Event emitted when the select has been closed. */
_this._closedStream = _this.openedChange.pipe(filter(function (o) { return !o; }), map(function () { }));
/** Event emitted when the selected value has been changed by the user. */
_this.selectionChange = new EventEmitter();
/**
* Event that emits whenever the raw value of the select changes. This is here primarily
* to facilitate the two-way binding for the `value` input.
* @docs-private
*/
_this.valueChange = new EventEmitter();
if (_this.ngControl) {
// Note: we provide the value accessor through here, instead of
// the `providers` to avoid running into a circular import.
_this.ngControl.valueAccessor = _this;
}
_this._scrollStrategyFactory = scrollStrategyFactory;
_this._scrollStrategy = _this._scrollStrategyFactory();
_this.tabIndex = parseInt(tabIndex) || 0;
// Force setter to be called in case id was not specified.
_this.id = _this.id;
return _this;
}
Object.defineProperty(MatSelect.prototype, "focused", {
/** Whether the select is focused. */
get: function () {
return this._focused || this._panelOpen;
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "placeholder", {
/** Placeholder to be shown if no value has been selected. */
get: function () { return this._placeholder; },
set: function (value) {
this._placeholder = value;
this.stateChanges.next();
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "required", {
/** Whether the component is required. */
get: function () { return this._required; },
set: function (value) {
this._required = coerceBooleanProperty(value);
this.stateChanges.next();
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "multiple", {
/** Whether the user should be allowed to select multiple options. */
get: function () { return this._multiple; },
set: function (value) {
if (this._selectionModel) {
throw getMatSelectDynamicMultipleError();
}
this._multiple = coerceBooleanProperty(value);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "disableOptionCentering", {
/** Whether to center the active option over the trigger. */
get: function () { return this._disableOptionCentering; },
set: function (value) {
this._disableOptionCentering = coerceBooleanProperty(value);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "compareWith", {
/**
* Function to compare the option values with the selected values. The first argument
* is a value from an option. The second is a value from the selection. A boolean
* should be returned.
*/
get: function () { return this._compareWith; },
set: function (fn) {
if (typeof fn !== 'function') {
throw getMatSelectNonFunctionValueError();
}
this._compareWith = fn;
if (this._selectionModel) {
// A different comparator means the selection could change.
this._initializeSelection();
}
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "value", {
/** Value of the select control. */
get: function () { return this._value; },
set: function (newValue) {
if (newValue !== this._value) {
this.writeValue(newValue);
this._value = newValue;
}
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "typeaheadDebounceInterval", {
/** Time to wait in milliseconds after the last keystroke before moving focus to an item. */
get: function () { return this._typeaheadDebounceInterval; },
set: function (value) {
this._typeaheadDebounceInterval = coerceNumberProperty(value);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "id", {
/** Unique id of the element. */
get: function () { return this._id; },
set: function (value) {
this._id = value || this._uid;
this.stateChanges.next();
},
enumerable: true,
configurable: true
});
MatSelect.prototype.ngOnInit = function () {
var _this = this;
this._selectionModel = new SelectionModel(this.multiple);
this.stateChanges.next();
// We need `distinctUntilChanged` here, because some browsers will
// fire the animation end event twice for the same animation. See:
// https://github.com/angular/angular/issues/24084
this._panelDoneAnimatingStream
.pipe(distinctUntilChanged(), takeUntil(this._destroy))
.subscribe(function () {
if (_this.panelOpen) {
_this._scrollTop = 0;
_this.openedChange.emit(true);
}
else {
_this.openedChange.emit(false);
_this.overlayDir.offsetX = 0;
_this._changeDetectorRef.markForCheck();
}
});
this._viewportRuler.change()
.pipe(takeUntil(this._destroy))
.subscribe(function () {
if (_this._panelOpen) {
_this._triggerRect = _this.trigger.nativeElement.getBoundingClientRect();
_this._changeDetectorRef.markForCheck();
}
});
};
MatSelect.prototype.ngAfterContentInit = function () {
var _this = this;
this._initKeyManager();
this._selectionModel.changed.pipe(takeUntil(this._destroy)).subscribe(function (event) {
event.added.forEach(function (option) { return option.select(); });
event.removed.forEach(function (option) { return option.deselect(); });
});
this.options.changes.pipe(startWith(null), takeUntil(this._destroy)).subscribe(function () {
_this._resetOptions();
_this._initializeSelection();
});
};
MatSelect.prototype.ngDoCheck = function () {
if (this.ngControl) {
this.updateErrorState();
}
};
MatSelect.prototype.ngOnChanges = function (changes) {
// Updating the disabled state is handled by `mixinDisabled`, but we need to additionally let
// the parent form field know to run change detection when the disabled state changes.
if (changes['disabled']) {
this.stateChanges.next();
}
if (changes['typeaheadDebounceInterval'] && this._keyManager) {
this._keyManager.withTypeAhead(this._typeaheadDebounceInterval);
}
};
MatSelect.prototype.ngOnDestroy = function () {
this._destroy.next();
this._destroy.complete();
this.stateChanges.complete();
};
/** Toggles the overlay panel open or closed. */
MatSelect.prototype.toggle = function () {
this.panelOpen ? this.close() : this.open();
};
/** Opens the overlay panel. */
MatSelect.prototype.open = function () {
var _this = this;
if (this.disabled || !this.options || !this.options.length || this._panelOpen) {
return;
}
this._triggerRect = this.trigger.nativeElement.getBoundingClientRect();
// Note: The computed font-size will be a string pixel value (e.g. "16px").
// `parseInt` ignores the trailing 'px' and converts this to a number.
this._triggerFontSize = parseInt(getComputedStyle(this.trigger.nativeElement).fontSize || '0');
this._panelOpen = true;
this._keyManager.withHorizontalOrientation(null);
this._calculateOverlayPosition();
this._highlightCorrectOption();
this._changeDetectorRef.markForCheck();
// Set the font size on the panel element once it exists.
this._ngZone.onStable.asObservable().pipe(take(1)).subscribe(function () {
if (_this._triggerFontSize && _this.overlayDir.overlayRef &&
_this.overlayDir.overlayRef.overlayElement) {
_this.overlayDir.overlayRef.overlayElement.style.fontSize = _this._triggerFontSize + "px";
}
});
};
/** Closes the overlay panel and focuses the host element. */
MatSelect.prototype.close = function () {
if (this._panelOpen) {
this._panelOpen = false;
this._keyManager.withHorizontalOrientation(this._isRtl() ? 'rtl' : 'ltr');
this._changeDetectorRef.markForCheck();
this._onTouched();
}
};
/**
* Sets the select's value. Part of the ControlValueAccessor interface
* required to integrate with Angular's core forms API.
*
* @param value New value to be written to the model.
*/
MatSelect.prototype.writeValue = function (value) {
if (this.options) {
this._setSelectionByValue(value);
}
};
/**
* Saves a callback function to be invoked when the select's value
* changes from user input. Part of the ControlValueAccessor interface
* required to integrate with Angular's core forms API.
*
* @param fn Callback to be triggered when the value changes.
*/
MatSelect.prototype.registerOnChange = function (fn) {
this._onChange = fn;
};
/**
* Saves a callback function to be invoked when the select is blurred
* by the user. Part of the ControlValueAccessor interface required
* to integrate with Angular's core forms API.
*
* @param fn Callback to be triggered when the component has been touched.
*/
MatSelect.prototype.registerOnTouched = function (fn) {
this._onTouched = fn;
};
/**
* Disables the select. Part of the ControlValueAccessor interface required
* to integrate with Angular's core forms API.
*
* @param isDisabled Sets whether the component is disabled.
*/
MatSelect.prototype.setDisabledState = function (isDisabled) {
this.disabled = isDisabled;
this._changeDetectorRef.markForCheck();
this.stateChanges.next();
};
Object.defineProperty(MatSelect.prototype, "panelOpen", {
/** Whether or not the overlay panel is open. */
get: function () {
return this._panelOpen;
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "selected", {
/** The currently selected option. */
get: function () {
return this.multiple ? this._selectionModel.selected : this._selectionModel.selected[0];
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatSelect.prototype, "triggerValue", {
/** The value displayed in the trigger. */
get: function () {
if (this.empty) {
return '';
}
if (this._multiple) {
var selectedOptions = this._selectionModel.selected.map(function (option) { return option.viewValue; });
if (this._isRtl()) {
selectedOptions.reverse();
}
// TODO(crisbeto): delimiter should be configurable for proper localization.
return selectedOptions.join(', ');
}
return this._selectionModel.selected[0].viewValue;
},
enumerable: true,
configurable: true
});
/** Whether the element is in RTL mode. */
MatSelect.prototype._isRtl = function () {
return this._dir ? this._dir.value === 'rtl' : false;
};
/** Handles all keydown events on the select. */
MatSelect.prototype._handleKeydown = function (event) {
if (!this.disabled) {
this.panelOpen ? this._handleOpenKeydown(event) : this._handleClosedKeydown(event);
}
};
/** Handles keyboard events while the select is closed. */
MatSelect.prototype._handleClosedKeydown = function (event) {
var keyCode = event.keyCode;
var isArrowKey = keyCode === DOWN_ARROW || keyCode === UP_ARROW ||
keyCode === LEFT_ARROW || keyCode === RIGHT_ARROW;
var isOpenKey = keyCode === ENTER || keyCode === SPACE;
var manager = this._keyManager;
// Open the select on ALT + arrow key to match the native <select>
if (!manager.isTyping() && (isOpenKey && !hasModifierKey(event)) ||
((this.multiple || event.altKey) && isArrowKey)) {
event.preventDefault(); // prevents the page from scrolling down when pressing space
this.open();
}
else if (!this.multiple) {
var previouslySelectedOption = this.selected;
if (keyCode === HOME || keyCode === END) {
keyCode === HOME ? manager.setFirstItemActive() : manager.setLastItemActive();
event.preventDefault();
}
else {
manager.onKeydown(event);
}
var selectedOption = this.selected;
// Since the value has changed, we need to announce it ourselves.
if (selectedOption && previouslySelectedOption !== selectedOption) {
// We set a duration on the live announcement, because we want the live element to be
// cleared after a while so that users can't navigate to it using the arrow keys.
this._liveAnnouncer.announce(selectedOption.viewValue, 10000);
}
}
};
/** Handles keyboard events when the selected is open. */
MatSelect.prototype._handleOpenKeydown = function (event) {
var manager = this._keyManager;
var keyCode = event.keyCode;
var isArrowKey = keyCode === DOWN_ARROW || keyCode === UP_ARROW;
var isTyping = manager.isTyping();
if (keyCode === HOME || keyCode === END) {
event.preventDefault();
keyCode === HOME ? manager.setFirstItemActive() : manager.setLastItemActive();
}
else if (isArrowKey && event.altKey) {
// Close the select on ALT + arrow key to match the native <select>
event.preventDefault();
this.close();
// Don't do anything in this case if the user is typing,
// because the typing sequence can include the space key.
}
else if (!isTyping && (keyCode === ENTER || keyCode === SPACE) && manager.activeItem &&
!hasModifierKey(event)) {
event.preventDefault();
manager.activeItem._selectViaInteraction();
}
else if (!isTyping && this._multiple && keyCode === A && event.ctrlKey) {
event.preventDefault();
var hasDeselectedOptions_1 = this.options.some(function (opt) { return !opt.disabled && !opt.selected; });
this.options.forEach(function (option) {
if (!option.disabled) {
hasDeselectedOptions_1 ? option.select() : option.deselect();
}
});
}
else {
var previouslyFocusedIndex = manager.activeItemIndex;
manager.onKeydown(event);
if (this._multiple && isArrowKey && event.shiftKey && manager.activeItem &&
manager.activeItemIndex !== previouslyFocusedIndex) {
manager.activeItem._selectViaInteraction();
}
}
};
MatSelect.prototype._onFocus = function () {
if (!this.disabled) {
this._focused = true;
this.stateChanges.next();
}
};
/**
* Calls the touched callback only if the panel is closed. Otherwise, the trigger will
* "blur" to the panel when it opens, causing a false positive.
*/
MatSelect.prototype._onBlur = function () {
this._focused = false;
if (!this.disabled && !this.panelOpen) {
this._onTouched();
this._changeDetectorRef.markForCheck();
this.stateChanges.next();
}
};
/**
* Callback that is invoked when the overlay panel has been attached.
*/
MatSelect.prototype._onAttached = function () {
var _this = this;
this.overlayDir.positionChange.pipe(take(1)).subscribe(function () {
_this._changeDetectorRef.detectChanges();
_this._calculateOverlayOffsetX();
_this.panel.nativeElement.scrollTop = _this._scrollTop;
});
};
/** Returns the theme to be used on the panel. */
MatSelect.prototype._getPanelTheme = function () {
return this._parentFormField ? "mat-" + this._parentFormField.color : '';
};
Object.defineProperty(MatSelect.prototype, "empty", {
/** Whether the select has a value. */
get: function () {
return !this._selectionModel || this._selectionModel.isEmpty();
},
enumerable: true,
configurable: true
});
MatSelect.prototype._initializeSelection = function () {
var _this = this;
// Defer setting the value in order to avoid the "Expression
// has changed after it was checked" errors from Angular.
Promise.resolve().then(function () {
_this._setSelectionByValue(_this.ngControl ? _this.ngControl.value : _this._value);
_this.stateChanges.next();
});
};
/**
* Sets the selected option based on a value. If no option can be
* found with the designated value, the select trigger is cleared.
*/
MatSelect.prototype._setSelectionByValue = function (value) {
var _this = this;
if (this.multiple && value) {
if (!Array.isArray(value)) {
throw getMatSelectNonArrayValueError();
}
this._selectionModel.clear();
value.forEach(function (currentValue) { return _this._selectValue(currentValue); });
this._sortValues();
}
else {
this._selectionModel.clear();
var correspondingOption = this._selectValue(value);
// Shift focus to the active item. Note that we shouldn't do this in multiple
// mode, because we don't know what option the user interacted with last.
if (correspondingOption) {
this._keyManager.setActiveItem(correspondingOption);
}
else if (!this.panelOpen) {
// Otherwise reset the highlighted option. Note that we only want to do this while
// closed, because doing it while open can shift the user's focus unnecessarily.
this._keyManager.setActiveItem(-1);
}
}
this._changeDetectorRef.markForCheck();
};
/**
* Finds and selects and option based on its value.
* @returns Option that has the corresponding value.
*/
MatSelect.prototype._selectValue = function (value) {
var _this = this;
var correspondingOption = this.options.find(function (option) {
try {
// Treat null as a special reset value.
return option.value != null && _this._compareWith(option.value, value);
}
catch (error) {
if (isDevMode()) {
// Notify developers of errors in their comparator.
console.warn(error);
}
return false;
}
});
if (correspondingOption) {
this._selectionModel.select(correspondingOption);
}
return correspondingOption;
};
/** Sets up a key manager to listen to keyboard events on the overlay panel. */
MatSelect.prototype._initKeyManager = function () {
var _this = this;
this._keyManager = new ActiveDescendantKeyManager(this.options)
.withTypeAhead(this._typeaheadDebounceInterval)
.withVerticalOrientation()
.withHorizontalOrientation(this._isRtl() ? 'rtl' : 'ltr')
.withAllowedModifierKeys(['shiftKey']);
this._keyManager.tabOut.pipe(takeUntil(this._destroy)).subscribe(function () {
// Select the active item when tabbing away. This is consistent with how the native
// select behaves. Note that we only want to do this in single selection mode.
if (!_this.multiple && _this._keyManager.activeItem) {
_this._keyManager.activeItem._selectViaInteraction();
}
// Restore focus to the trigger before closing. Ensures that the focus
// position won't be lost if the user got focus into the overlay.
_this.focus();
_this.close();
});
this._keyManager.change.pipe(takeUntil(this._destroy)).subscribe(function () {
if (_this._panelOpen && _this.panel) {
_this._scrollActiveOptionIntoView();
}
else if (!_this._panelOpen && !_this.multiple && _this._keyManager.activeItem) {
_this._keyManager.activeItem._selectViaInteraction();
}
});
};
/** Drops current option subscriptions and IDs and resets from scratch. */
MatSelect.prototype._resetOptions = function () {
var _this = this;
var changedOrDestroyed = merge(this.options.changes, this._destroy);
this.optionSelectionChanges.pipe(takeUntil(changedOrDestroyed)).subscribe(function (event) {
_this._onSelect(event.source, event.isUserInput);
if (event.isUserInput && !_this.multiple && _this._panelOpen) {
_this.close();
_this.focus();
}
});
// Listen to changes in the internal state of the options and react accordingly.
// Handles cases like the labels of the selected options changing.
merge.apply(void 0, __spread(this.options.map(function (option) { return option._stateChanges; }))).pipe(takeUntil(changedOrDestroyed))
.subscribe(function () {
_this._changeDetectorRef.markForCheck();
_this.stateChanges.next();
});
this._setOptionIds();
};
/** Invoked when an option is clicked. */
MatSelect.prototype._onSelect = function (option, isUserInput) {
var wasSelected = this._selectionModel.isSelected(option);
if (option.value == null && !this._multiple) {
option.deselect();
this._selectionModel.clear();
this._propagateChanges(option.value);
}
else {
if (wasSelected !== option.selected) {
option.selected ? this._selectionModel.select(option) :
this._selectionModel.deselect(option);
}
if (isUserInput) {
this._keyManager.setActiveItem(option);
}
if (this.multiple) {
this._sortValues();
if (isUserInput) {
// In case the user selected the option with their mouse, we
// want to restore focus back to the trigger, in order to
// prevent the select keyboard controls from clashing with
// the ones from `mat-option`.
this.focus();
}
}
}
if (wasSelected !== this._selectionModel.isSelected(option)) {
this._propagateChanges();
}
this.stateChanges.next();
};
/** Sorts the selected values in the selected based on their order in the panel. */
MatSelect.prototype._sortValues = function () {
var _this = this;
if (this.multiple) {
var options_1 = this.options.toArray();
this._selectionModel.sort(function (a, b) {
return _this.sortComparator ? _this.sortComparator(a, b, options_1) :
options_1.indexOf(a) - options_1.indexOf(b);
});
this.stateChanges.next();
}
};
/** Emits change event to set the model value. */
MatSelect.prototype._propagateChanges = function (fallbackValue) {
var valueToEmit = null;
if (this.multiple) {
valueToEmit = this.selected.map(function (option) { return option.value; });
}
else {
valueToEmit = this.selected ? this.selected.value : fallbackValue;
}
this._value = valueToEmit;
this.valueChange.emit(valueToEmit);
this._onChange(valueToEmit);
this.selectionChange.emit(new MatSelectChange(this, valueToEmit));
this._changeDetectorRef.markForCheck();
};
/** Records option IDs to pass to the aria-owns property. */
MatSelect.prototype._setOptionIds = function () {
this._optionIds = this.options.map(function (option) { return option.id; }).join(' ');
};
/**
* Highlights the selected item. If no option is selected, it will highlight
* the first item instead.
*/
MatSelect.prototype._highlightCorrectOption = function () {
if (this._keyManager) {
if (this.empty) {
this._keyManager.setFirstItemActive();
}
else {
this._keyManager.setActiveItem(this._selectionModel.selected[0]);
}
}
};
/** Scrolls the active option into view. */
MatSelect.prototype._scrollActiveOptionIntoView = function () {
var activeOptionIndex = this._keyManager.activeItemIndex || 0;
var labelCount = _countGroupLabelsBeforeOption(activeOptionIndex, this.options, this.optionGroups);
this.panel.nativeElement.scrollTop = _getOptionScrollPosition(activeOptionIndex + labelCount, this._getItemHeight(), this.panel.nativeElement.scrollTop, SELECT_PANEL_MAX_HEIGHT);
};
/** Focuses the select element. */
MatSelect.prototype.focus = function (options) {
this._elementRef.nativeElement.focus(options);
};
/** Gets the index of the provided option in the option list. */
MatSelect.prototype._getOptionIndex = function (option) {
return this.options.reduce(function (result, current, index) {
return result === undefined ? (option === current ? index : undefined) : result;
}, undefined);
};
/** Calculates the scroll position and x- and y-offsets of the overlay panel. */
MatSelect.prototype._calculateOverlayPosition = function () {
var itemHeight = this._getItemHeight();
var items = this._getItemCount();
var panelHeight = Math.min(items * itemHeight, SELECT_PANEL_MAX_HEIGHT);
var scrollContainerHeight = items * itemHeight;
// The farthest the panel can be scrolled before it hits the bottom
var maxScroll = scrollContainerHeight - panelHeight;
// If no value is selected we open the popup to the first item.
var selectedOptionOffset = this.empty ? 0 : this._getOptionIndex(this._selectionModel.selected[0]);
selectedOptionOffset += _countGroupLabelsBeforeOption(selectedOptionOffset, this.options, this.optionGroups);
// We must maintain a scroll buffer so the selected option will be scrolled to the
// center of the overlay panel rather than the top.
var scrollBuffer = panelHeight / 2;
this._scrollTop = this._calculateOverlayScroll(selectedOptionOffset, scrollBuffer, maxScroll);
this._offsetY = this._calculateOverlayOffsetY(selectedOptionOffset, scrollBuffer, maxScroll);
this._checkOverlayWithinViewport(maxScroll);
};
/**
* Calculates the scroll position of the select's overlay panel.
*
* Attempts to center the selected option in the panel. If the option is
* too high or too low in the panel to be scrolled to the center, it clamps the
* scroll position to the min or max scroll positions respectively.
*/
MatSelect.prototype._calculateOverlayScroll = function (selectedIndex, scrollBuffer, maxScroll) {
var itemHeight = this._getItemHeight();
var optionOffsetFromScrollTop = itemHeight * selectedIndex;
var halfOptionHeight = itemHeight / 2;
// Starts at the optionOffsetFromScrollTop, which scrolls the option to the top of the
// scroll container, then subtracts the scroll buffer to scroll the option down to
// the center of the overlay panel. Half the option height must be re-added to the
// scrollTop so the option is centered based on its middle, not its top edge.
var optimalScrollPosition = optionOffsetFromScrollTop - scrollBuffer + halfOptionHeight;
return Math.min(Math.max(0, optimalScrollPosition), maxScroll);
};
/** Returns the aria-label of the select component. */
MatSelect.prototype._getAriaLabel = function () {
// If an ariaLabelledby value has been set by the consumer, the select should not overwrite the
// `aria-labelledby` value by setting the ariaLabel to the placeholder.
return this.ariaLabelledby ? null : this.ariaLabel || this.placeholder;
};
/** Returns the aria-labelledby of the select component. */
MatSelect.prototype._getAriaLabelledby = function () {
if (this.ariaLabelledby) {
return this.ariaLabelledby;
}
// Note: we use `_getAriaLabel` here, because we want to check whether there's a
// computed label. `this.ariaLabel` is only the user-specified label.
if (!this._parentFormField || !this._parentFormField._hasFloatingLabel() ||
this._getAriaLabel()) {
return null;
}
return this._parentFormField._labelId || null;
};
/** Determines the `aria-activedescendant` to be set on the host. */
MatSelect.prototype._getAriaActiveDescendant = function () {
if (this.panelOpen && this._keyManager && this._keyManager.activeItem) {
return this._keyManager.activeItem.id;
}
return null;
};
/**
* Sets the x-offset of the overlay panel in relation to the trigger's top start corner.
* This must be adjusted to align the selected option text over the trigger text when
* the panel opens. Will change based on LTR or RTL text direction. Note that the offset
* can't be calculated until the panel has been attached, because we need to know the
* content width in order to constrain the panel within the viewport.
*/
MatSelect.prototype._calculateOverlayOffsetX = function () {
var overlayRect = this.overlayDir.overlayRef.overlayElement.getBoundingClientRect();
var viewportSize = this._viewportRuler.getViewportSize();
var isRtl = this._isRtl();
var paddingWidth = this.multiple ? SELECT_MULTIPLE_PANEL_PADDING_X + SELECT_PANEL_PADDING_X :
SELECT_PANEL_PADDING_X * 2;
var offsetX;
// Adjust the offset, depending on the option padding.
if (this.multiple) {
offsetX = SELECT_MULTIPLE_PANEL_PADDING_X;
}
else {
var selected = this._selectionModel.selected[0] || this.options.first;
offsetX = selected && selected.group ? SELECT_PANEL_INDENT_PADDING_X : SELECT_PANEL_PADDING_X;
}
// Invert the offset in LTR.
if (!isRtl) {
offsetX *= -1;
}
// Determine how much the select overflows on each side.
var leftOverflow = 0 - (overlayRect.left + offsetX - (isRtl ? paddingWidth : 0));
var rightOverflow = overlayRect.right + offsetX - viewportSize.width
+ (isRtl ? 0 : paddingWidth);
// If the element overflows on either side, reduce the offset to allow it to fit.
if (leftOverflow > 0) {
offsetX += leftOverflow + SELECT_PANEL_VIEWPORT_PADDING;
}
else if (rightOverflow > 0) {
offsetX -= rightOverflow + SELECT_PANEL_VIEWPORT_PADDING;
}
// Set the offset directly in order to avoid having to go through change detection and
// potentially triggering "changed after it was checked" errors. Round the value to avoid
// blurry content in some browsers.
this.overlayDir.offsetX = Math.round(offsetX);
this.overlayDir.overlayRef.updatePosition();
};
/**
* Calculates the y-offset of the select's overlay panel in relation to the
* top start corner of the trigger. It has to be adjusted in order for the
* selected option to be aligned over the trigger when the panel opens.
*/
MatSelect.prototype._calculateOverlayOffsetY = function (selectedIndex, scrollBuffer, maxScroll) {
var itemHeight = this._getItemHeight();
var optionHeightAdjustment = (itemHeight - this._triggerRect.height) / 2;
var maxOptionsDisplayed = Math.floor(SELECT_PANEL_MAX_HEIGHT / itemHeight);
var optionOffsetFromPanelTop;
// Disable offset if requested by user by returning 0 as value to offset
if (this._disableOptionCentering) {
return 0;
}
if (this._scrollTop === 0) {
optionOffsetFromPanelTop = selectedIndex * itemHeight;
}
else if (this._scrollTop === maxScroll) {
var firstDisplayedIndex = this._getItemCount() - maxOptionsDisplayed;
var selectedDisplayIndex = selectedIndex - firstDisplayedIndex;
// The first item is partially out of the viewport. Therefore we need to calculate what
// portion of it is shown in the viewport and account for it in our offset.
var partialItemHeight = itemHeight - (this._getItemCount() * itemHeight - SELECT_PANEL_MAX_HEIGHT) % itemHeight;
// Because the panel height is longer than the height of the options alone,
// there is always extra padding at the top or bottom of the panel. When
// scrolled to the very bottom, this padding is at the top of the panel and
// must be added to the offset.
optionOffsetFromPanelTop = selectedDisplayIndex * itemHeight + partialItemHeight;
}
else {
// If the option was scrolled to the middle of the panel using a scroll buffer,
// its offset will be the scroll buffer minus the half height that was added to
// center it.
optionOffsetFromPanelTop = scrollBuffer - itemHeight / 2;
}
// The final offset is the option's offset from the top, adjusted for the height difference,
// multiplied by -1 to ensure that the overlay moves in the correct direction up the page.
// The value is rounded to prevent some browsers from blurring the content.
return Math.round(optionOffsetFromPanelTop * -1 - optionHeightAdjustment);
};
/**
* Checks that the attempted overlay position will fit within the viewport.
* If it will not fit, tries to adjust the scroll position and the associated
* y-offset so the panel can open fully on-screen. If it still won't fit,
* sets the offset back to 0 to allow the fallback position to take over.
*/
MatSelect.prototype._checkOverlayWithinViewport = function (maxScroll) {
var itemHeight = this._getItemHeight();
var viewportSize = this._viewportRuler.getViewportSize();
var topSpaceAvailable = this._triggerRect.top - SELECT_PANEL_VIEWPORT_PADDING;
var bottomSpaceAvailable = viewportSize.height - this._triggerRect.bottom - SELECT_PANEL_VIEWPORT_PADDING;
var panelHeightTop = Math.abs(this._offsetY);
var totalPanelHeight = Math.min(this._getItemCount() * itemHeight, SELECT_PANEL_MAX_HEIGHT);
var panelHeightBottom = totalPanelHeight - panelHeightTop - this._triggerRect.height;
if (panelHeightBottom > bottomSpaceAvailable) {
this._adjustPanelUp(panelHeightBottom, bottomSpaceAvailable);
}
else if (panelHeightTop > topSpaceAvailable) {
this._adjustPanelDown(panelHeightTop, topSpaceAvailable, maxScroll);
}
else {
this._transformOrigin = this._getOriginBasedOnOption();
}
};
/** Adjusts the overlay panel up to fit in the viewport. */
MatSelect.prototype._adjustPanelUp = function (panelHeightBottom, bottomSpaceAvailable) {
// Browsers ignore fractional scroll offsets, so we need to round.
var distanceBelowViewport = Math.round(panelHeightBottom - bottomSpaceAvailable);
// Scrolls the panel up by the distance it was extending past the boundary, then
// adjusts the offset by that amount to move the panel up into the viewport.
this._scrollTop -= distanceBelowViewport;
this._offsetY -= distanceBelowViewp