@angular/material
Version:
Angular Material
192 lines • 24.9 kB
JavaScript
/**
* @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
*/
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { BACKSPACE, hasModifierKey, TAB } from '@angular/cdk/keycodes';
import { Directive, ElementRef, EventEmitter, Inject, Input, Output } from '@angular/core';
import { MAT_CHIPS_DEFAULT_OPTIONS } from './chip-default-options';
import { MatChipList } from './chip-list';
import * as i0 from "@angular/core";
// Increasing integer for generating unique ids.
let nextUniqueId = 0;
/**
* Directive that adds chip-specific behaviors to an input element inside `<mat-form-field>`.
* May be placed inside or outside of an `<mat-chip-list>`.
*/
export class MatChipInput {
constructor(_elementRef, _defaultOptions) {
this._elementRef = _elementRef;
this._defaultOptions = _defaultOptions;
/** Whether the control is focused. */
this.focused = false;
this._addOnBlur = false;
/**
* The list of key codes that will trigger a chipEnd event.
*
* Defaults to `[ENTER]`.
*/
this.separatorKeyCodes = this._defaultOptions.separatorKeyCodes;
/** Emitted when a chip is to be added. */
this.chipEnd = new EventEmitter();
/** The input's placeholder text. */
this.placeholder = '';
/** Unique id for the input. */
this.id = `mat-chip-list-input-${nextUniqueId++}`;
this._disabled = false;
this.inputElement = this._elementRef.nativeElement;
}
/** Register input for chip list */
set chipList(value) {
if (value) {
this._chipList = value;
this._chipList.registerInput(this);
}
}
/**
* Whether or not the chipEnd event will be emitted when the input is blurred.
*/
get addOnBlur() { return this._addOnBlur; }
set addOnBlur(value) { this._addOnBlur = coerceBooleanProperty(value); }
/** Whether the input is disabled. */
get disabled() { return this._disabled || (this._chipList && this._chipList.disabled); }
set disabled(value) { this._disabled = coerceBooleanProperty(value); }
/** Whether the input is empty. */
get empty() { return !this.inputElement.value; }
ngOnChanges() {
this._chipList.stateChanges.next();
}
ngOnDestroy() {
this.chipEnd.complete();
}
ngAfterContentInit() {
this._focusLastChipOnBackspace = this.empty;
}
/** Utility method to make host definition/tests more clear. */
_keydown(event) {
if (event) {
// Allow the user's focus to escape when they're tabbing forward. Note that we don't
// want to do this when going backwards, because focus should go back to the first chip.
if (event.keyCode === TAB && !hasModifierKey(event, 'shiftKey')) {
this._chipList._allowFocusEscape();
}
// To prevent the user from accidentally deleting chips when pressing BACKSPACE continuously,
// We focus the last chip on backspace only after the user has released the backspace button,
// and the input is empty (see behaviour in _keyup)
if (event.keyCode === BACKSPACE && this._focusLastChipOnBackspace) {
this._chipList._keyManager.setLastItemActive();
event.preventDefault();
return;
}
else {
this._focusLastChipOnBackspace = false;
}
}
this._emitChipEnd(event);
}
/**
* Pass events to the keyboard manager. Available here for tests.
*/
_keyup(event) {
// Allow user to move focus to chips next time he presses backspace
if (!this._focusLastChipOnBackspace && event.keyCode === BACKSPACE && this.empty) {
this._focusLastChipOnBackspace = true;
event.preventDefault();
}
}
/** Checks to see if the blur should emit the (chipEnd) event. */
_blur() {
if (this.addOnBlur) {
this._emitChipEnd();
}
this.focused = false;
// Blur the chip list if it is not focused
if (!this._chipList.focused) {
this._chipList._blur();
}
this._chipList.stateChanges.next();
}
_focus() {
this.focused = true;
this._focusLastChipOnBackspace = this.empty;
this._chipList.stateChanges.next();
}
/** Checks to see if the (chipEnd) event needs to be emitted. */
_emitChipEnd(event) {
if (!this.inputElement.value && !!event) {
this._chipList._keydown(event);
}
if (!event || this._isSeparatorKey(event)) {
this.chipEnd.emit({
input: this.inputElement,
value: this.inputElement.value,
chipInput: this,
});
event?.preventDefault();
}
}
_onInput() {
// Let chip list know whenever the value changes.
this._chipList.stateChanges.next();
}
/** Focuses the input. */
focus(options) {
this.inputElement.focus(options);
}
/** Clears the input */
clear() {
this.inputElement.value = '';
this._focusLastChipOnBackspace = true;
}
/** Checks whether a keycode is one of the configured separators. */
_isSeparatorKey(event) {
return !hasModifierKey(event) && new Set(this.separatorKeyCodes).has(event.keyCode);
}
}
MatChipInput.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: MatChipInput, deps: [{ token: i0.ElementRef }, { token: MAT_CHIPS_DEFAULT_OPTIONS }], target: i0.ɵɵFactoryTarget.Directive });
MatChipInput.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "12.0.0", version: "13.0.0-next.15", type: MatChipInput, selector: "input[matChipInputFor]", inputs: { chipList: ["matChipInputFor", "chipList"], addOnBlur: ["matChipInputAddOnBlur", "addOnBlur"], separatorKeyCodes: ["matChipInputSeparatorKeyCodes", "separatorKeyCodes"], placeholder: "placeholder", id: "id", disabled: "disabled" }, outputs: { chipEnd: "matChipInputTokenEnd" }, host: { listeners: { "keydown": "_keydown($event)", "keyup": "_keyup($event)", "blur": "_blur()", "focus": "_focus()", "input": "_onInput()" }, properties: { "id": "id", "attr.disabled": "disabled || null", "attr.placeholder": "placeholder || null", "attr.aria-invalid": "_chipList && _chipList.ngControl ? _chipList.ngControl.invalid : null", "attr.aria-required": "_chipList && _chipList.required || null" }, classAttribute: "mat-chip-input mat-input-element" }, exportAs: ["matChipInput", "matChipInputFor"], usesOnChanges: true, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: MatChipInput, decorators: [{
type: Directive,
args: [{
selector: 'input[matChipInputFor]',
exportAs: 'matChipInput, matChipInputFor',
host: {
'class': 'mat-chip-input mat-input-element',
'(keydown)': '_keydown($event)',
'(keyup)': '_keyup($event)',
'(blur)': '_blur()',
'(focus)': '_focus()',
'(input)': '_onInput()',
'[id]': 'id',
'[attr.disabled]': 'disabled || null',
'[attr.placeholder]': 'placeholder || null',
'[attr.aria-invalid]': '_chipList && _chipList.ngControl ? _chipList.ngControl.invalid : null',
'[attr.aria-required]': '_chipList && _chipList.required || null',
}
}]
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: undefined, decorators: [{
type: Inject,
args: [MAT_CHIPS_DEFAULT_OPTIONS]
}] }]; }, propDecorators: { chipList: [{
type: Input,
args: ['matChipInputFor']
}], addOnBlur: [{
type: Input,
args: ['matChipInputAddOnBlur']
}], separatorKeyCodes: [{
type: Input,
args: ['matChipInputSeparatorKeyCodes']
}], chipEnd: [{
type: Output,
args: ['matChipInputTokenEnd']
}], placeholder: [{
type: Input
}], id: [{
type: Input
}], disabled: [{
type: Input
}] } });
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {BACKSPACE, hasModifierKey, TAB} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Output\n} from '@angular/core';\nimport {MatChipsDefaultOptions, MAT_CHIPS_DEFAULT_OPTIONS} from './chip-default-options';\nimport {MatChipList} from './chip-list';\nimport {MatChipTextControl} from './chip-text-control';\n\n/** Represents an input event on a `matChipInput`. */\nexport interface MatChipInputEvent {\n  /**\n   * The native `<input>` element that the event is being fired for.\n   * @deprecated Use `MatChipInputEvent#chipInput.inputElement` instead.\n   * @breaking-change 13.0.0 This property will be removed.\n   */\n  input: HTMLInputElement;\n\n  /** The value of the input. */\n  value: string;\n\n  /**\n   * Reference to the chip input that emitted the event.\n   * @breaking-change 13.0.0 This property will be made required.\n   */\n  chipInput?: MatChipInput;\n}\n\n// Increasing integer for generating unique ids.\nlet nextUniqueId = 0;\n\n/**\n * Directive that adds chip-specific behaviors to an input element inside `<mat-form-field>`.\n * May be placed inside or outside of an `<mat-chip-list>`.\n */\n@Directive({\n  selector: 'input[matChipInputFor]',\n  exportAs: 'matChipInput, matChipInputFor',\n  host: {\n    'class': 'mat-chip-input mat-input-element',\n    '(keydown)': '_keydown($event)',\n    '(keyup)': '_keyup($event)',\n    '(blur)': '_blur()',\n    '(focus)': '_focus()',\n    '(input)': '_onInput()',\n    '[id]': 'id',\n    '[attr.disabled]': 'disabled || null',\n    '[attr.placeholder]': 'placeholder || null',\n    '[attr.aria-invalid]': '_chipList && _chipList.ngControl ? _chipList.ngControl.invalid : null',\n    '[attr.aria-required]': '_chipList && _chipList.required || null',\n  }\n})\nexport class MatChipInput implements MatChipTextControl, OnChanges, OnDestroy, AfterContentInit {\n  /** Used to prevent focus moving to chips while user is holding backspace */\n  private _focusLastChipOnBackspace: boolean;\n\n  /** Whether the control is focused. */\n  focused: boolean = false;\n  _chipList: MatChipList;\n\n  /** Register input for chip list */\n  @Input('matChipInputFor')\n  set chipList(value: MatChipList) {\n    if (value) {\n      this._chipList = value;\n      this._chipList.registerInput(this);\n    }\n  }\n\n  /**\n   * Whether or not the chipEnd event will be emitted when the input is blurred.\n   */\n  @Input('matChipInputAddOnBlur')\n  get addOnBlur(): boolean { return this._addOnBlur; }\n  set addOnBlur(value: boolean) { this._addOnBlur = coerceBooleanProperty(value); }\n  _addOnBlur: boolean = false;\n\n  /**\n   * The list of key codes that will trigger a chipEnd event.\n   *\n   * Defaults to `[ENTER]`.\n   */\n  @Input('matChipInputSeparatorKeyCodes')\n  separatorKeyCodes: readonly number[] | ReadonlySet<number> =\n      this._defaultOptions.separatorKeyCodes;\n\n  /** Emitted when a chip is to be added. */\n  @Output('matChipInputTokenEnd') readonly chipEnd = new EventEmitter<MatChipInputEvent>();\n\n  /** The input's placeholder text. */\n  @Input() placeholder: string = '';\n\n  /** Unique id for the input. */\n  @Input() id: string = `mat-chip-list-input-${nextUniqueId++}`;\n\n  /** Whether the input is disabled. */\n  @Input()\n  get disabled(): boolean { return this._disabled || (this._chipList && this._chipList.disabled); }\n  set disabled(value: boolean) { this._disabled = coerceBooleanProperty(value); }\n  private _disabled: boolean = false;\n\n  /** Whether the input is empty. */\n  get empty(): boolean { return !this.inputElement.value; }\n\n  /** The native input element to which this directive is attached. */\n  readonly inputElement: HTMLInputElement;\n\n  constructor(\n    protected _elementRef: ElementRef<HTMLInputElement>,\n    @Inject(MAT_CHIPS_DEFAULT_OPTIONS) private _defaultOptions: MatChipsDefaultOptions) {\n    this.inputElement = this._elementRef.nativeElement as HTMLInputElement;\n  }\n\n  ngOnChanges(): void {\n    this._chipList.stateChanges.next();\n  }\n\n  ngOnDestroy(): void {\n    this.chipEnd.complete();\n  }\n\n  ngAfterContentInit(): void {\n    this._focusLastChipOnBackspace = this.empty;\n  }\n\n  /** Utility method to make host definition/tests more clear. */\n  _keydown(event?: KeyboardEvent) {\n    if (event) {\n      // Allow the user's focus to escape when they're tabbing forward. Note that we don't\n      // want to do this when going backwards, because focus should go back to the first chip.\n      if (event.keyCode === TAB && !hasModifierKey(event, 'shiftKey')) {\n        this._chipList._allowFocusEscape();\n      }\n\n      // To prevent the user from accidentally deleting chips when pressing BACKSPACE continuously,\n      // We focus the last chip on backspace only after the user has released the backspace button,\n      // and the input is empty (see behaviour in _keyup)\n      if (event.keyCode === BACKSPACE && this._focusLastChipOnBackspace) {\n        this._chipList._keyManager.setLastItemActive();\n        event.preventDefault();\n        return;\n      } else {\n        this._focusLastChipOnBackspace = false;\n      }\n    }\n\n    this._emitChipEnd(event);\n  }\n\n  /**\n   * Pass events to the keyboard manager. Available here for tests.\n   */\n  _keyup(event: KeyboardEvent) {\n    // Allow user to move focus to chips next time he presses backspace\n    if (!this._focusLastChipOnBackspace && event.keyCode === BACKSPACE && this.empty) {\n      this._focusLastChipOnBackspace = true;\n      event.preventDefault();\n    }\n  }\n\n  /** Checks to see if the blur should emit the (chipEnd) event. */\n  _blur() {\n    if (this.addOnBlur) {\n      this._emitChipEnd();\n    }\n    this.focused = false;\n    // Blur the chip list if it is not focused\n    if (!this._chipList.focused) {\n      this._chipList._blur();\n    }\n    this._chipList.stateChanges.next();\n  }\n\n  _focus() {\n    this.focused = true;\n    this._focusLastChipOnBackspace = this.empty;\n    this._chipList.stateChanges.next();\n  }\n\n  /** Checks to see if the (chipEnd) event needs to be emitted. */\n  _emitChipEnd(event?: KeyboardEvent) {\n    if (!this.inputElement.value && !!event) {\n      this._chipList._keydown(event);\n    }\n\n    if (!event || this._isSeparatorKey(event)) {\n      this.chipEnd.emit({\n        input: this.inputElement,\n        value: this.inputElement.value,\n        chipInput: this,\n      });\n\n      event?.preventDefault();\n    }\n  }\n\n  _onInput() {\n    // Let chip list know whenever the value changes.\n    this._chipList.stateChanges.next();\n  }\n\n  /** Focuses the input. */\n  focus(options?: FocusOptions): void {\n    this.inputElement.focus(options);\n  }\n\n  /** Clears the input */\n  clear(): void {\n    this.inputElement.value = '';\n    this._focusLastChipOnBackspace = true;\n  }\n\n  /** Checks whether a keycode is one of the configured separators. */\n  private _isSeparatorKey(event: KeyboardEvent) {\n    return !hasModifierKey(event) && new Set(this.separatorKeyCodes).has(event.keyCode);\n  }\n\n  static ngAcceptInputType_addOnBlur: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n"]}