import { ChangeDetectionStrategy, Component, ContentChild, ContentChildren, Directive, QueryList, ViewEncapsulation, } from '@angular/core';
import { _countGroupLabelsBeforeLegacyOption, _getLegacyOptionScrollPosition, MAT_LEGACY_OPTGROUP, MAT_LEGACY_OPTION_PARENT_COMPONENT, MatLegacyOption, } from '@angular/material/legacy-core';
import { MAT_SELECT_TRIGGER, _MatSelectBase } from '@angular/material/select';
import { MatLegacyFormFieldControl } from '@angular/material/legacy-form-field';
import { take, takeUntil } from 'rxjs/operators';
import { matLegacySelectAnimations } from './select-animations';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common";
import * as i2 from "@angular/cdk/overlay";
/**
* 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.
* @deprecated Use `SELECT_PANEL_MAX_HEIGHT` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const SELECT_PANEL_MAX_HEIGHT = 256;
/**
* The panel's padding on the x-axis.
* @deprecated Use `SELECT_PANEL_PADDING_X` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const SELECT_PANEL_PADDING_X = 16;
/**
* The panel's x axis padding if it is indented (e.g. there is an option group).
* @deprecated Use `SELECT_PANEL_INDENT_PADDING_X` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const SELECT_PANEL_INDENT_PADDING_X = SELECT_PANEL_PADDING_X * 2;
/**
* The height of the select items in `em` units.
* @deprecated Use `SELECT_ITEM_HEIGHT_EM` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const 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.
*
* @deprecated Use `SELECT_MULTIPLE_PANEL_PADDING_X` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const 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.
* @deprecated Use `SELECT_PANEL_VIEWPORT_PADDING` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export const SELECT_PANEL_VIEWPORT_PADDING = 8;
/**
* Change event object that is emitted when the select value has changed.
* @deprecated Use `MatSelectChange` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export class MatLegacySelectChange {
constructor(
/** 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;
}
}
/**
* Allows the user to customize the trigger that is displayed when the select has a value.
* @deprecated Use `MatSelectTrigger` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export class MatLegacySelectTrigger {
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: MatLegacySelectTrigger, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: MatLegacySelectTrigger, selector: "mat-select-trigger", providers: [{ provide: MAT_SELECT_TRIGGER, useExisting: MatLegacySelectTrigger }], ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: MatLegacySelectTrigger, decorators: [{
type: Directive,
args: [{
selector: 'mat-select-trigger',
providers: [{ provide: MAT_SELECT_TRIGGER, useExisting: MatLegacySelectTrigger }],
}]
}] });
/**
* @deprecated Use `MatSelect` from `@angular/material/select` instead. See https://material.angular.io/guide/mdc-migration for information about migrating.
* @breaking-change 17.0.0
*/
export class MatLegacySelect extends _MatSelectBase {
constructor() {
super(...arguments);
/** The scroll position of the overlay panel, calculated to center the selected option. */
this._scrollTop = 0;
/** The cached font-size of the trigger element. */
this._triggerFontSize = 0;
/** The value of the select panel's transform-origin property. */
this._transformOrigin = 'top';
/**
* 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._positions = [
{
originX: 'start',
originY: 'top',
overlayX: 'start',
overlayY: 'top',
},
{
originX: 'start',
originY: 'bottom',
overlayX: 'start',
overlayY: 'bottom',
},
];
}
/**
* 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.
*/
_calculateOverlayScroll(selectedIndex, scrollBuffer, maxScroll) {
const itemHeight = this._getItemHeight();
const optionOffsetFromScrollTop = itemHeight * selectedIndex;
const 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.
const optimalScrollPosition = optionOffsetFromScrollTop - scrollBuffer + halfOptionHeight;
return Math.min(Math.max(0, optimalScrollPosition), maxScroll);
}
ngOnInit() {
super.ngOnInit();
this._viewportRuler
.change()
.pipe(takeUntil(this._destroy))
.subscribe(() => {
if (this.panelOpen) {
this._triggerRect = this.trigger.nativeElement.getBoundingClientRect();
this._changeDetectorRef.markForCheck();
}
});
}
open() {
if (super._canOpen()) {
super.open();
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._calculateOverlayPosition();
// Set the font size on the panel element once it exists.
this._ngZone.onStable.pipe(take(1)).subscribe(() => {
if (this._triggerFontSize &&
this._overlayDir.overlayRef &&
this._overlayDir.overlayRef.overlayElement) {
this._overlayDir.overlayRef.overlayElement.style.fontSize = `${this._triggerFontSize}px`;
}
});
}
}
/** Scrolls the active option into view. */
_scrollOptionIntoView(index) {
const labelCount = _countGroupLabelsBeforeLegacyOption(index, this.options, this.optionGroups);
const itemHeight = this._getItemHeight();
if (index === 0 && labelCount === 1) {
// If we've got one group label before the option and we're at the top option,
// scroll the list to the top. This is better UX than scrolling the list to the
// top of the option, because it allows the user to read the top group's label.
this.panel.nativeElement.scrollTop = 0;
}
else {
this.panel.nativeElement.scrollTop = _getLegacyOptionScrollPosition((index + labelCount) * itemHeight, itemHeight, this.panel.nativeElement.scrollTop, SELECT_PANEL_MAX_HEIGHT);
}
}
_positioningSettled() {
this._calculateOverlayOffsetX();
this.panel.nativeElement.scrollTop = this._scrollTop;
}
_panelDoneAnimating(isOpen) {
if (this.panelOpen) {
this._scrollTop = 0;
}
else {
this._overlayDir.offsetX = 0;
this._changeDetectorRef.markForCheck();
}
super._panelDoneAnimating(isOpen);
}
_getChangeEvent(value) {
return new MatLegacySelectChange(this, value);
}
_getOverlayMinWidth() {
return this._triggerRect?.width;
}
/**
* 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.
*/
_calculateOverlayOffsetX() {
const overlayRect = this._overlayDir.overlayRef.overlayElement.getBoundingClientRect();
const viewportSize = this._viewportRuler.getViewportSize();
const isRtl = this._isRtl();
const paddingWidth = this.multiple
? SELECT_MULTIPLE_PANEL_PADDING_X + SELECT_PANEL_PADDING_X
: SELECT_PANEL_PADDING_X * 2;
let offsetX;
// Adjust the offset, depending on the option padding.
if (this.multiple) {
offsetX = SELECT_MULTIPLE_PANEL_PADDING_X;
}
else if (this.disableOptionCentering) {
offsetX = SELECT_PANEL_PADDING_X;
}
else {
let 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.
const leftOverflow = 0 - (overlayRect.left + offsetX - (isRtl ? paddingWidth : 0));
const 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.
*/
_calculateOverlayOffsetY(selectedIndex, scrollBuffer, maxScroll) {
const itemHeight = this._getItemHeight();
const optionHeightAdjustment = (itemHeight - this._triggerRect.height) / 2;
const maxOptionsDisplayed = Math.floor(SELECT_PANEL_MAX_HEIGHT / itemHeight);
let 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) {
const firstDisplayedIndex = this._getItemCount() - maxOptionsDisplayed;
const 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.
let 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.
*/
_checkOverlayWithinViewport(maxScroll) {
const itemHeight = this._getItemHeight();
const viewportSize = this._viewportRuler.getViewportSize();
const topSpaceAvailable = this._triggerRect.top - SELECT_PANEL_VIEWPORT_PADDING;
const bottomSpaceAvailable = viewportSize.height - this._triggerRect.bottom - SELECT_PANEL_VIEWPORT_PADDING;
const panelHeightTop = Math.abs(this._offsetY);
const totalPanelHeight = Math.min(this._getItemCount() * itemHeight, SELECT_PANEL_MAX_HEIGHT);
const 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. */
_adjustPanelUp(panelHeightBottom, bottomSpaceAvailable) {
// Browsers ignore fractional scroll offsets, so we need to round.
const 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 -= distanceBelowViewport;
this._transformOrigin = this._getOriginBasedOnOption();
// If the panel is scrolled to the very top, it won't be able to fit the panel
// by scrolling, so set the offset to 0 to allow the fallback position to take
// effect.
if (this._scrollTop <= 0) {
this._scrollTop = 0;
this._offsetY = 0;
this._transformOrigin = `50% bottom 0px`;
}
}
/** Adjusts the overlay panel down to fit in the viewport. */
_adjustPanelDown(panelHeightTop, topSpaceAvailable, maxScroll) {
// Browsers ignore fractional scroll offsets, so we need to round.
const distanceAboveViewport = Math.round(panelHeightTop - topSpaceAvailable);
// Scrolls the panel down by the distance it was extending past the boundary, then
// adjusts the offset by that amount to move the panel down into the viewport.
this._scrollTop += distanceAboveViewport;
this._offsetY += distanceAboveViewport;
this._transformOrigin = this._getOriginBasedOnOption();
// If the panel is scrolled to the very bottom, it won't be able to fit the
// panel by scrolling, so set the offset to 0 to allow the fallback position
// to take effect.
if (this._scrollTop >= maxScroll) {
this._scrollTop = maxScroll;
this._offsetY = 0;
this._transformOrigin = `50% top 0px`;
return;
}
}
/** Calculates the scroll position and x- and y-offsets of the overlay panel. */
_calculateOverlayPosition() {
const itemHeight = this._getItemHeight();
const items = this._getItemCount();
const panelHeight = Math.min(items * itemHeight, SELECT_PANEL_MAX_HEIGHT);
const scrollContainerHeight = items * itemHeight;
// The farthest the panel can be scrolled before it hits the bottom
const maxScroll = scrollContainerHeight - panelHeight;
// If no value is selected we open the popup to the first item.
let selectedOptionOffset;
if (this.empty) {
selectedOptionOffset = 0;
}
else {
selectedOptionOffset = Math.max(this.options.toArray().indexOf(this._selectionModel.selected[0]), 0);
}
selectedOptionOffset += _countGroupLabelsBeforeLegacyOption(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.
const scrollBuffer = panelHeight / 2;
this._scrollTop = this._calculateOverlayScroll(selectedOptionOffset, scrollBuffer, maxScroll);
this._offsetY = this._calculateOverlayOffsetY(selectedOptionOffset, scrollBuffer, maxScroll);
this._checkOverlayWithinViewport(maxScroll);
}
/** Sets the transform origin point based on the selected option. */
_getOriginBasedOnOption() {
const itemHeight = this._getItemHeight();
const optionHeightAdjustment = (itemHeight - this._triggerRect.height) / 2;
const originY = Math.abs(this._offsetY) - optionHeightAdjustment + itemHeight / 2;
return `50% ${originY}px 0px`;
}
/** Calculates the height of the select's options. */
_getItemHeight() {
return this._triggerFontSize * SELECT_ITEM_HEIGHT_EM;
}
/** Calculates the amount of items in the select. This includes options and group labels. */
_getItemCount() {
return this.options.length + this.optionGroups.length;
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: MatLegacySelect, deps: null, target: i0.ɵɵFactoryTarget.Component }); }
static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.1.1", type: MatLegacySelect, selector: "mat-select", inputs: { disabled: "disabled", disableRipple: "disableRipple", tabIndex: "tabIndex" }, host: { attributes: { "role": "combobox", "aria-autocomplete": "none", "aria-haspopup": "true", "ngSkipHydration": "" }, listeners: { "keydown": "_handleKeydown($event)", "focus": "_onFocus()", "blur": "_onBlur()" }, properties: { "attr.id": "id", "attr.tabindex": "tabIndex", "attr.aria-controls": "panelOpen ? id + \"-panel\" : null", "attr.aria-expanded": "panelOpen", "attr.aria-label": "ariaLabel || null", "attr.aria-required": "required.toString()", "attr.aria-disabled": "disabled.toString()", "attr.aria-invalid": "errorState", "attr.aria-activedescendant": "_getAriaActiveDescendant()", "class.mat-select-disabled": "disabled", "class.mat-select-invalid": "errorState", "class.mat-select-required": "required", "class.mat-select-empty": "empty", "class.mat-select-multiple": "multiple" }, classAttribute: "mat-select" }, providers: [
{ provide: MatLegacyFormFieldControl, useExisting: MatLegacySelect },
{ provide: MAT_LEGACY_OPTION_PARENT_COMPONENT, useExisting: MatLegacySelect },
], queries: [{ propertyName: "customTrigger", first: true, predicate: MAT_SELECT_TRIGGER, descendants: true }, { propertyName: "options", predicate: MatLegacyOption, descendants: true }, { propertyName: "optionGroups", predicate: MAT_LEGACY_OPTGROUP, descendants: true }], exportAs: ["matSelect"], usesInheritance: true, ngImport: i0, template: "\n