1 | /**
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2 | * @license
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3 | * Copyright Google LLC All Rights Reserved.
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4 | *
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5 | * Use of this source code is governed by an MIT-style license that can be
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6 | * found in the LICENSE file at https://angular.io/license
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7 | */
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8 | import { Directive, ElementRef, EventEmitter, inject, Input, NgZone, Output, } from '@angular/core';
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9 | import { coerceBooleanProperty } from '@angular/cdk/coercion';
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10 | import { InputModalityDetector } from '@angular/cdk/a11y';
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11 | import { ENTER, hasModifierKey, LEFT_ARROW, RIGHT_ARROW, SPACE } from '@angular/cdk/keycodes';
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12 | import { Directionality } from '@angular/cdk/bidi';
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13 | import { fromEvent, Subject } from 'rxjs';
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14 | import { filter, takeUntil } from 'rxjs/operators';
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15 | import { CdkMenuTrigger } from './menu-trigger';
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16 | import { CDK_MENU } from './menu-interface';
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17 | import { MENU_STACK } from './menu-stack';
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18 | import { MENU_AIM } from './menu-aim';
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19 | import * as i0 from "@angular/core";
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20 | /**
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21 | * Directive which provides the ability for an element to be focused and navigated to using the
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22 | * keyboard when residing in a CdkMenu, CdkMenuBar, or CdkMenuGroup. It performs user defined
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23 | * behavior when clicked.
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24 | */
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25 | class CdkMenuItem {
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26 | /** Whether the CdkMenuItem is disabled - defaults to false */
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27 | get disabled() {
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28 | return this._disabled;
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29 | }
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30 | set disabled(value) {
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31 | this._disabled = coerceBooleanProperty(value);
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32 | }
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33 | /** Whether the menu item opens a menu. */
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34 | get hasMenu() {
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35 | return this._menuTrigger?.menuTemplateRef != null;
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36 | }
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37 | constructor() {
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38 | this._dir = inject(Directionality, { optional: true });
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39 | this._inputModalityDetector = inject(InputModalityDetector);
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40 | this._elementRef = inject(ElementRef);
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41 | this._ngZone = inject(NgZone);
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42 | /** The menu aim service used by this menu. */
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43 | this._menuAim = inject(MENU_AIM, { optional: true });
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44 | /** The stack of menus this menu belongs to. */
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45 | this._menuStack = inject(MENU_STACK);
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46 | /** The parent menu in which this menuitem resides. */
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47 | this._parentMenu = inject(CDK_MENU, { optional: true });
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48 | /** Reference to the CdkMenuItemTrigger directive if one is added to the same element */
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49 | this._menuTrigger = inject(CdkMenuTrigger, { optional: true, self: true });
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50 | this._disabled = false;
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51 | /**
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52 | * If this MenuItem is a regular MenuItem, outputs when it is triggered by a keyboard or mouse
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53 | * event.
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54 | */
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55 | this.triggered = new EventEmitter();
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56 | /**
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57 | * The tabindex for this menu item managed internally and used for implementing roving a
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58 | * tab index.
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59 | */
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60 | this._tabindex = -1;
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61 | /** Whether the item should close the menu if triggered by the spacebar. */
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62 | this.closeOnSpacebarTrigger = true;
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63 | /** Emits when the menu item is destroyed. */
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64 | this.destroyed = new Subject();
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65 | this._setupMouseEnter();
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66 | this._setType();
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67 | if (this._isStandaloneItem()) {
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68 | this._tabindex = 0;
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69 | }
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70 | }
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71 | ngOnDestroy() {
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72 | this.destroyed.next();
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73 | this.destroyed.complete();
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74 | }
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75 | /** Place focus on the element. */
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76 | focus() {
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77 | this._elementRef.nativeElement.focus();
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78 | }
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79 | /**
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80 | * If the menu item is not disabled and the element does not have a menu trigger attached, emit
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81 | * on the cdkMenuItemTriggered emitter and close all open menus.
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82 | * @param options Options the configure how the item is triggered
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83 | * - keepOpen: specifies that the menu should be kept open after triggering the item.
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84 | */
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85 | trigger(options) {
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86 | const { keepOpen } = { ...options };
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87 | if (!this.disabled && !this.hasMenu) {
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88 | this.triggered.next();
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89 | if (!keepOpen) {
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90 | this._menuStack.closeAll({ focusParentTrigger: true });
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91 | }
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92 | }
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93 | }
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94 | /** Return true if this MenuItem has an attached menu and it is open. */
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95 | isMenuOpen() {
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96 | return !!this._menuTrigger?.isOpen();
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97 | }
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98 | /**
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99 | * Get a reference to the rendered Menu if the Menu is open and it is visible in the DOM.
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100 | * @return the menu if it is open, otherwise undefined.
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101 | */
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102 | getMenu() {
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103 | return this._menuTrigger?.getMenu();
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104 | }
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105 | /** Get the CdkMenuTrigger associated with this element. */
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106 | getMenuTrigger() {
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107 | return this._menuTrigger;
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108 | }
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109 | /** Get the label for this element which is required by the FocusableOption interface. */
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110 | getLabel() {
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111 | return this.typeaheadLabel || this._elementRef.nativeElement.textContent?.trim() || '';
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112 | }
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113 | /** Reset the tabindex to -1. */
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114 | _resetTabIndex() {
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115 | if (!this._isStandaloneItem()) {
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116 | this._tabindex = -1;
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117 | }
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118 | }
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119 | /**
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120 | * Set the tab index to 0 if not disabled and it's a focus event, or a mouse enter if this element
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121 | * is not in a menu bar.
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122 | */
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123 | _setTabIndex(event) {
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124 | if (this.disabled) {
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125 | return;
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126 | }
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127 | // don't set the tabindex if there are no open sibling or parent menus
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128 | if (!event || !this._menuStack.isEmpty()) {
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129 | this._tabindex = 0;
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130 | }
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131 | }
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132 | /**
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133 | * Handles keyboard events for the menu item, specifically either triggering the user defined
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134 | * callback or opening/closing the current menu based on whether the left or right arrow key was
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135 | * pressed.
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136 | * @param event the keyboard event to handle
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137 | */
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138 | _onKeydown(event) {
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139 | switch (event.keyCode) {
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140 | case SPACE:
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141 | case ENTER:
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142 | if (!hasModifierKey(event)) {
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143 | this.trigger({ keepOpen: event.keyCode === SPACE && !this.closeOnSpacebarTrigger });
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144 | }
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145 | break;
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146 | case RIGHT_ARROW:
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147 | if (!hasModifierKey(event)) {
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148 | if (this._parentMenu && this._isParentVertical()) {
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149 | if (this._dir?.value !== 'rtl') {
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150 | this._forwardArrowPressed(event);
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151 | }
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152 | else {
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153 | this._backArrowPressed(event);
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154 | }
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155 | }
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156 | }
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157 | break;
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158 | case LEFT_ARROW:
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159 | if (!hasModifierKey(event)) {
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160 | if (this._parentMenu && this._isParentVertical()) {
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161 | if (this._dir?.value !== 'rtl') {
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162 | this._backArrowPressed(event);
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163 | }
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164 | else {
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165 | this._forwardArrowPressed(event);
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166 | }
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167 | }
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168 | }
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169 | break;
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170 | }
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171 | }
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172 | /** Handles clicks on the menu item. */
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173 | _handleClick() {
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174 | // Don't handle clicks originating from the keyboard since we
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175 | // already do the same on `keydown` events for enter and space.
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176 | if (this._inputModalityDetector.mostRecentModality !== 'keyboard') {
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177 | this.trigger();
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178 | }
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179 | }
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180 | /** Whether this menu item is standalone or within a menu or menu bar. */
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181 | _isStandaloneItem() {
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182 | return !this._parentMenu;
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183 | }
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184 | /**
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185 | * Handles the user pressing the back arrow key.
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186 | * @param event The keyboard event.
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187 | */
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188 | _backArrowPressed(event) {
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189 | const parentMenu = this._parentMenu;
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190 | if (this._menuStack.hasInlineMenu() || this._menuStack.length() > 1) {
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191 | event.preventDefault();
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192 | this._menuStack.close(parentMenu, {
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193 | focusNextOnEmpty: this._menuStack.inlineMenuOrientation() === 'horizontal'
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194 | ? 1 /* FocusNext.previousItem */
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195 | : 2 /* FocusNext.currentItem */,
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196 | focusParentTrigger: true,
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197 | });
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198 | }
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199 | }
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200 | /**
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201 | * Handles the user pressing the forward arrow key.
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202 | * @param event The keyboard event.
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203 | */
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204 | _forwardArrowPressed(event) {
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205 | if (!this.hasMenu && this._menuStack.inlineMenuOrientation() === 'horizontal') {
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206 | event.preventDefault();
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207 | this._menuStack.closeAll({
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208 | focusNextOnEmpty: 0 /* FocusNext.nextItem */,
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209 | focusParentTrigger: true,
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210 | });
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211 | }
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212 | }
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213 | /**
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214 | * Subscribe to the mouseenter events and close any sibling menu items if this element is moused
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215 | * into.
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216 | */
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217 | _setupMouseEnter() {
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218 | if (!this._isStandaloneItem()) {
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219 | const closeOpenSiblings = () => this._ngZone.run(() => this._menuStack.closeSubMenuOf(this._parentMenu));
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220 | this._ngZone.runOutsideAngular(() => fromEvent(this._elementRef.nativeElement, 'mouseenter')
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221 | .pipe(filter(() => !this._menuStack.isEmpty() && !this.hasMenu), takeUntil(this.destroyed))
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222 | .subscribe(() => {
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223 | if (this._menuAim) {
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224 | this._menuAim.toggle(closeOpenSiblings);
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225 | }
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226 | else {
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227 | closeOpenSiblings();
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228 | }
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229 | }));
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230 | }
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231 | }
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232 | /**
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233 | * Return true if the enclosing parent menu is configured in a horizontal orientation, false
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234 | * otherwise or if no parent.
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235 | */
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236 | _isParentVertical() {
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237 | return this._parentMenu?.orientation === 'vertical';
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238 | }
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239 | /** Sets the `type` attribute of the menu item. */
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240 | _setType() {
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241 | const element = this._elementRef.nativeElement;
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242 | if (element.nodeName === 'BUTTON' && !element.getAttribute('type')) {
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243 | // Prevent form submissions.
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244 | element.setAttribute('type', 'button');
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245 | }
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246 | }
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247 | static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: CdkMenuItem, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
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248 | static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.0.0", type: CdkMenuItem, isStandalone: true, selector: "[cdkMenuItem]", inputs: { disabled: ["cdkMenuItemDisabled", "disabled"], typeaheadLabel: ["cdkMenuitemTypeaheadLabel", "typeaheadLabel"] }, outputs: { triggered: "cdkMenuItemTriggered" }, host: { attributes: { "role": "menuitem" }, listeners: { "blur": "_resetTabIndex()", "focus": "_setTabIndex()", "click": "_handleClick()", "keydown": "_onKeydown($event)" }, properties: { "tabindex": "_tabindex", "attr.aria-disabled": "disabled || null" }, classAttribute: "cdk-menu-item" }, exportAs: ["cdkMenuItem"], ngImport: i0 }); }
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249 | }
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250 | export { CdkMenuItem };
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251 | i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: CdkMenuItem, decorators: [{
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252 | type: Directive,
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253 | args: [{
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254 | selector: '[cdkMenuItem]',
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255 | exportAs: 'cdkMenuItem',
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256 | standalone: true,
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257 | host: {
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258 | 'role': 'menuitem',
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259 | 'class': 'cdk-menu-item',
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260 | '[tabindex]': '_tabindex',
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261 | '[attr.aria-disabled]': 'disabled || null',
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262 | '(blur)': '_resetTabIndex()',
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263 | '(focus)': '_setTabIndex()',
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264 | '(click)': '_handleClick()',
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265 | '(keydown)': '_onKeydown($event)',
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266 | },
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267 | }]
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268 | }], ctorParameters: function () { return []; }, propDecorators: { disabled: [{
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269 | type: Input,
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270 | args: ['cdkMenuItemDisabled']
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271 | }], typeaheadLabel: [{
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272 | type: Input,
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273 | args: ['cdkMenuitemTypeaheadLabel']
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274 | }], triggered: [{
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275 | type: Output,
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276 | args: ['cdkMenuItemTriggered']
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277 | }] } });
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278 | //# 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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 {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  inject,\n  Input,\n  NgZone,\n  OnDestroy,\n  Output,\n} from '@angular/core';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {FocusableOption, InputModalityDetector} from '@angular/cdk/a11y';\nimport {ENTER, hasModifierKey, LEFT_ARROW, RIGHT_ARROW, SPACE} from '@angular/cdk/keycodes';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {fromEvent, Subject} from 'rxjs';\nimport {filter, takeUntil} from 'rxjs/operators';\nimport {CdkMenuTrigger} from './menu-trigger';\nimport {CDK_MENU, Menu} from './menu-interface';\nimport {FocusNext, MENU_STACK} from './menu-stack';\nimport {FocusableElement} from './pointer-focus-tracker';\nimport {MENU_AIM, Toggler} from './menu-aim';\n\n/**\n * Directive which provides the ability for an element to be focused and navigated to using the\n * keyboard when residing in a CdkMenu, CdkMenuBar, or CdkMenuGroup. It performs user defined\n * behavior when clicked.\n */\n@Directive({\n  selector: '[cdkMenuItem]',\n  exportAs: 'cdkMenuItem',\n  standalone: true,\n  host: {\n    'role': 'menuitem',\n    'class': 'cdk-menu-item',\n    '[tabindex]': '_tabindex',\n    '[attr.aria-disabled]': 'disabled || null',\n    '(blur)': '_resetTabIndex()',\n    '(focus)': '_setTabIndex()',\n    '(click)': '_handleClick()',\n    '(keydown)': '_onKeydown($event)',\n  },\n})\nexport class CdkMenuItem implements FocusableOption, FocusableElement, Toggler, OnDestroy {\n  protected readonly _dir = inject(Directionality, {optional: true});\n  private readonly _inputModalityDetector = inject(InputModalityDetector);\n  readonly _elementRef: ElementRef<HTMLElement> = inject(ElementRef);\n  protected _ngZone = inject(NgZone);\n\n  /** The menu aim service used by this menu. */\n  private readonly _menuAim = inject(MENU_AIM, {optional: true});\n\n  /** The stack of menus this menu belongs to. */\n  private readonly _menuStack = inject(MENU_STACK);\n\n  /** The parent menu in which this menuitem resides. */\n  private readonly _parentMenu = inject(CDK_MENU, {optional: true});\n\n  /** Reference to the CdkMenuItemTrigger directive if one is added to the same element */\n  private readonly _menuTrigger = inject(CdkMenuTrigger, {optional: true, self: true});\n\n  /**  Whether the CdkMenuItem is disabled - defaults to false */\n  @Input('cdkMenuItemDisabled')\n  get disabled(): boolean {\n    return this._disabled;\n  }\n  set disabled(value: BooleanInput) {\n    this._disabled = coerceBooleanProperty(value);\n  }\n  private _disabled = false;\n\n  /**\n   * The text used to locate this item during menu typeahead. If not specified,\n   * the `textContent` of the item will be used.\n   */\n  @Input('cdkMenuitemTypeaheadLabel') typeaheadLabel: string | null;\n\n  /**\n   * If this MenuItem is a regular MenuItem, outputs when it is triggered by a keyboard or mouse\n   * event.\n   */\n  @Output('cdkMenuItemTriggered') readonly triggered: EventEmitter<void> = new EventEmitter();\n\n  /** Whether the menu item opens a menu. */\n  get hasMenu() {\n    return this._menuTrigger?.menuTemplateRef != null;\n  }\n\n  /**\n   * The tabindex for this menu item managed internally and used for implementing roving a\n   * tab index.\n   */\n  _tabindex: 0 | -1 = -1;\n\n  /** Whether the item should close the menu if triggered by the spacebar. */\n  protected closeOnSpacebarTrigger = true;\n\n  /** Emits when the menu item is destroyed. */\n  protected readonly destroyed = new Subject<void>();\n\n  constructor() {\n    this._setupMouseEnter();\n    this._setType();\n\n    if (this._isStandaloneItem()) {\n      this._tabindex = 0;\n    }\n  }\n\n  ngOnDestroy() {\n    this.destroyed.next();\n    this.destroyed.complete();\n  }\n\n  /** Place focus on the element. */\n  focus() {\n    this._elementRef.nativeElement.focus();\n  }\n\n  /**\n   * If the menu item is not disabled and the element does not have a menu trigger attached, emit\n   * on the cdkMenuItemTriggered emitter and close all open menus.\n   * @param options Options the configure how the item is triggered\n   *   - keepOpen: specifies that the menu should be kept open after triggering the item.\n   */\n  trigger(options?: {keepOpen: boolean}) {\n    const {keepOpen} = {...options};\n    if (!this.disabled && !this.hasMenu) {\n      this.triggered.next();\n      if (!keepOpen) {\n        this._menuStack.closeAll({focusParentTrigger: true});\n      }\n    }\n  }\n\n  /** Return true if this MenuItem has an attached menu and it is open. */\n  isMenuOpen() {\n    return !!this._menuTrigger?.isOpen();\n  }\n\n  /**\n   * Get a reference to the rendered Menu if the Menu is open and it is visible in the DOM.\n   * @return the menu if it is open, otherwise undefined.\n   */\n  getMenu(): Menu | undefined {\n    return this._menuTrigger?.getMenu();\n  }\n\n  /** Get the CdkMenuTrigger associated with this element. */\n  getMenuTrigger(): CdkMenuTrigger | null {\n    return this._menuTrigger;\n  }\n\n  /** Get the label for this element which is required by the FocusableOption interface. */\n  getLabel(): string {\n    return this.typeaheadLabel || this._elementRef.nativeElement.textContent?.trim() || '';\n  }\n\n  /** Reset the tabindex to -1. */\n  _resetTabIndex() {\n    if (!this._isStandaloneItem()) {\n      this._tabindex = -1;\n    }\n  }\n\n  /**\n   * Set the tab index to 0 if not disabled and it's a focus event, or a mouse enter if this element\n   * is not in a menu bar.\n   */\n  _setTabIndex(event?: MouseEvent) {\n    if (this.disabled) {\n      return;\n    }\n\n    // don't set the tabindex if there are no open sibling or parent menus\n    if (!event || !this._menuStack.isEmpty()) {\n      this._tabindex = 0;\n    }\n  }\n\n  /**\n   * Handles keyboard events for the menu item, specifically either triggering the user defined\n   * callback or opening/closing the current menu based on whether the left or right arrow key was\n   * pressed.\n   * @param event the keyboard event to handle\n   */\n  _onKeydown(event: KeyboardEvent) {\n    switch (event.keyCode) {\n      case SPACE:\n      case ENTER:\n        if (!hasModifierKey(event)) {\n          this.trigger({keepOpen: event.keyCode === SPACE && !this.closeOnSpacebarTrigger});\n        }\n        break;\n\n      case RIGHT_ARROW:\n        if (!hasModifierKey(event)) {\n          if (this._parentMenu && this._isParentVertical()) {\n            if (this._dir?.value !== 'rtl') {\n              this._forwardArrowPressed(event);\n            } else {\n              this._backArrowPressed(event);\n            }\n          }\n        }\n        break;\n\n      case LEFT_ARROW:\n        if (!hasModifierKey(event)) {\n          if (this._parentMenu && this._isParentVertical()) {\n            if (this._dir?.value !== 'rtl') {\n              this._backArrowPressed(event);\n            } else {\n              this._forwardArrowPressed(event);\n            }\n          }\n        }\n        break;\n    }\n  }\n\n  /** Handles clicks on the menu item. */\n  _handleClick() {\n    // Don't handle clicks originating from the keyboard since we\n    // already do the same on `keydown` events for enter and space.\n    if (this._inputModalityDetector.mostRecentModality !== 'keyboard') {\n      this.trigger();\n    }\n  }\n\n  /** Whether this menu item is standalone or within a menu or menu bar. */\n  private _isStandaloneItem() {\n    return !this._parentMenu;\n  }\n\n  /**\n   * Handles the user pressing the back arrow key.\n   * @param event The keyboard event.\n   */\n  private _backArrowPressed(event: KeyboardEvent) {\n    const parentMenu = this._parentMenu!;\n    if (this._menuStack.hasInlineMenu() || this._menuStack.length() > 1) {\n      event.preventDefault();\n      this._menuStack.close(parentMenu, {\n        focusNextOnEmpty:\n          this._menuStack.inlineMenuOrientation() === 'horizontal'\n            ? FocusNext.previousItem\n            : FocusNext.currentItem,\n        focusParentTrigger: true,\n      });\n    }\n  }\n\n  /**\n   * Handles the user pressing the forward arrow key.\n   * @param event The keyboard event.\n   */\n  private _forwardArrowPressed(event: KeyboardEvent) {\n    if (!this.hasMenu && this._menuStack.inlineMenuOrientation() === 'horizontal') {\n      event.preventDefault();\n      this._menuStack.closeAll({\n        focusNextOnEmpty: FocusNext.nextItem,\n        focusParentTrigger: true,\n      });\n    }\n  }\n\n  /**\n   * Subscribe to the mouseenter events and close any sibling menu items if this element is moused\n   * into.\n   */\n  private _setupMouseEnter() {\n    if (!this._isStandaloneItem()) {\n      const closeOpenSiblings = () =>\n        this._ngZone.run(() => this._menuStack.closeSubMenuOf(this._parentMenu!));\n\n      this._ngZone.runOutsideAngular(() =>\n        fromEvent(this._elementRef.nativeElement, 'mouseenter')\n          .pipe(\n            filter(() => !this._menuStack.isEmpty() && !this.hasMenu),\n            takeUntil(this.destroyed),\n          )\n          .subscribe(() => {\n            if (this._menuAim) {\n              this._menuAim.toggle(closeOpenSiblings);\n            } else {\n              closeOpenSiblings();\n            }\n          }),\n      );\n    }\n  }\n\n  /**\n   * Return true if the enclosing parent menu is configured in a horizontal orientation, false\n   * otherwise or if no parent.\n   */\n  private _isParentVertical() {\n    return this._parentMenu?.orientation === 'vertical';\n  }\n\n  /** Sets the `type` attribute of the menu item. */\n  private _setType() {\n    const element = this._elementRef.nativeElement;\n\n    if (element.nodeName === 'BUTTON' && !element.getAttribute('type')) {\n      // Prevent form submissions.\n      element.setAttribute('type', 'button');\n    }\n  }\n}\n"]} |
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