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 { DOCUMENT, ɵgetDOM as getDOM } from '@angular/common';
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9 | import { Inject, Injectable } from '@angular/core';
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10 | import { EventManagerPlugin } from './event_manager';
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11 | /**
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12 | * Defines supported modifiers for key events.
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13 | */
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14 | const MODIFIER_KEYS = ['alt', 'control', 'meta', 'shift'];
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15 | const DOM_KEY_LOCATION_NUMPAD = 3;
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16 | // Map to convert some key or keyIdentifier values to what will be returned by getEventKey
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17 | const _keyMap = {
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18 | // The following values are here for cross-browser compatibility and to match the W3C standard
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19 | // cf https://www.w3.org/TR/DOM-Level-3-Events-key/
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20 | '\b': 'Backspace',
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21 | '\t': 'Tab',
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22 | '\x7F': 'Delete',
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23 | '\x1B': 'Escape',
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24 | 'Del': 'Delete',
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25 | 'Esc': 'Escape',
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26 | 'Left': 'ArrowLeft',
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27 | 'Right': 'ArrowRight',
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28 | 'Up': 'ArrowUp',
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29 | 'Down': 'ArrowDown',
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30 | 'Menu': 'ContextMenu',
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31 | 'Scroll': 'ScrollLock',
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32 | 'Win': 'OS'
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33 | };
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34 | // There is a bug in Chrome for numeric keypad keys:
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35 | // https://code.google.com/p/chromium/issues/detail?id=155654
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36 | // 1, 2, 3 ... are reported as A, B, C ...
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37 | const _chromeNumKeyPadMap = {
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38 | 'A': '1',
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39 | 'B': '2',
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40 | 'C': '3',
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41 | 'D': '4',
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42 | 'E': '5',
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43 | 'F': '6',
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44 | 'G': '7',
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45 | 'H': '8',
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46 | 'I': '9',
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47 | 'J': '*',
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48 | 'K': '+',
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49 | 'M': '-',
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50 | 'N': '.',
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51 | 'O': '/',
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52 | '\x60': '0',
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53 | '\x90': 'NumLock'
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54 | };
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55 | const ɵ0 = (event) => event.altKey, ɵ1 = (event) => event.ctrlKey, ɵ2 = (event) => event.metaKey, ɵ3 = (event) => event.shiftKey;
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56 | /**
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57 | * Retrieves modifiers from key-event objects.
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58 | */
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59 | const MODIFIER_KEY_GETTERS = {
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60 | 'alt': ɵ0,
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61 | 'control': ɵ1,
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62 | 'meta': ɵ2,
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63 | 'shift': ɵ3
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64 | };
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65 | /**
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66 | * @publicApi
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67 | * A browser plug-in that provides support for handling of key events in Angular.
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68 | */
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69 | export class KeyEventsPlugin extends EventManagerPlugin {
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70 | /**
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71 | * Initializes an instance of the browser plug-in.
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72 | * @param doc The document in which key events will be detected.
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73 | */
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74 | constructor(doc) {
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75 | super(doc);
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76 | }
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77 | /**
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78 | * Reports whether a named key event is supported.
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79 | * @param eventName The event name to query.
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80 | * @return True if the named key event is supported.
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81 | */
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82 | supports(eventName) {
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83 | return KeyEventsPlugin.parseEventName(eventName) != null;
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84 | }
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85 | /**
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86 | * Registers a handler for a specific element and key event.
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87 | * @param element The HTML element to receive event notifications.
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88 | * @param eventName The name of the key event to listen for.
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89 | * @param handler A function to call when the notification occurs. Receives the
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90 | * event object as an argument.
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91 | * @returns The key event that was registered.
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92 | */
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93 | addEventListener(element, eventName, handler) {
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94 | const parsedEvent = KeyEventsPlugin.parseEventName(eventName);
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95 | const outsideHandler = KeyEventsPlugin.eventCallback(parsedEvent['fullKey'], handler, this.manager.getZone());
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96 | return this.manager.getZone().runOutsideAngular(() => {
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97 | return getDOM().onAndCancel(element, parsedEvent['domEventName'], outsideHandler);
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98 | });
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99 | }
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100 | static parseEventName(eventName) {
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101 | const parts = eventName.toLowerCase().split('.');
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102 | const domEventName = parts.shift();
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103 | if ((parts.length === 0) || !(domEventName === 'keydown' || domEventName === 'keyup')) {
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104 | return null;
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105 | }
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106 | const key = KeyEventsPlugin._normalizeKey(parts.pop());
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107 | let fullKey = '';
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108 | MODIFIER_KEYS.forEach(modifierName => {
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109 | const index = parts.indexOf(modifierName);
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110 | if (index > -1) {
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111 | parts.splice(index, 1);
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112 | fullKey += modifierName + '.';
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113 | }
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114 | });
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115 | fullKey += key;
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116 | if (parts.length != 0 || key.length === 0) {
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117 | // returning null instead of throwing to let another plugin process the event
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118 | return null;
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119 | }
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120 | // NOTE: Please don't rewrite this as so, as it will break JSCompiler property renaming.
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121 | // The code must remain in the `result['domEventName']` form.
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122 | // return {domEventName, fullKey};
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123 | const result = {};
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124 | result['domEventName'] = domEventName;
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125 | result['fullKey'] = fullKey;
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126 | return result;
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127 | }
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128 | static getEventFullKey(event) {
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129 | let fullKey = '';
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130 | let key = getEventKey(event);
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131 | key = key.toLowerCase();
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132 | if (key === ' ') {
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133 | key = 'space'; // for readability
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134 | }
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135 | else if (key === '.') {
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136 | key = 'dot'; // because '.' is used as a separator in event names
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137 | }
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138 | MODIFIER_KEYS.forEach(modifierName => {
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139 | if (modifierName != key) {
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140 | const modifierGetter = MODIFIER_KEY_GETTERS[modifierName];
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141 | if (modifierGetter(event)) {
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142 | fullKey += modifierName + '.';
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143 | }
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144 | }
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145 | });
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146 | fullKey += key;
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147 | return fullKey;
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148 | }
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149 | /**
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150 | * Configures a handler callback for a key event.
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151 | * @param fullKey The event name that combines all simultaneous keystrokes.
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152 | * @param handler The function that responds to the key event.
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153 | * @param zone The zone in which the event occurred.
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154 | * @returns A callback function.
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155 | */
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156 | static eventCallback(fullKey, handler, zone) {
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157 | return (event /** TODO #9100 */) => {
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158 | if (KeyEventsPlugin.getEventFullKey(event) === fullKey) {
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159 | zone.runGuarded(() => handler(event));
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160 | }
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161 | };
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162 | }
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163 | /** @internal */
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164 | static _normalizeKey(keyName) {
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165 | // TODO: switch to a Map if the mapping grows too much
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166 | switch (keyName) {
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167 | case 'esc':
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168 | return 'escape';
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169 | default:
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170 | return keyName;
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171 | }
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172 | }
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173 | }
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174 | KeyEventsPlugin.decorators = [
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175 | { type: Injectable }
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176 | ];
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177 | KeyEventsPlugin.ctorParameters = () => [
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178 | { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
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179 | ];
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180 | function getEventKey(event) {
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181 | let key = event.key;
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182 | if (key == null) {
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183 | key = event.keyIdentifier;
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184 | // keyIdentifier is defined in the old draft of DOM Level 3 Events implemented by Chrome and
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185 | // Safari cf
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186 | // https://www.w3.org/TR/2007/WD-DOM-Level-3-Events-20071221/events.html#Events-KeyboardEvents-Interfaces
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187 | if (key == null) {
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188 | return 'Unidentified';
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189 | }
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190 | if (key.startsWith('U+')) {
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191 | key = String.fromCharCode(parseInt(key.substring(2), 16));
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192 | if (event.location === DOM_KEY_LOCATION_NUMPAD && _chromeNumKeyPadMap.hasOwnProperty(key)) {
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193 | // There is a bug in Chrome for numeric keypad keys:
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194 | // https://code.google.com/p/chromium/issues/detail?id=155654
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195 | // 1, 2, 3 ... are reported as A, B, C ...
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196 | key = _chromeNumKeyPadMap[key];
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197 | }
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198 | }
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199 | }
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200 | return _keyMap[key] || key;
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201 | }
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202 | export { ɵ0, ɵ1, ɵ2, ɵ3 };
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203 | //# 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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 {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';\nimport {Inject, Injectable, NgZone} from '@angular/core';\nimport {EventManagerPlugin} from './event_manager';\n\n/**\n * Defines supported modifiers for key events.\n */\nconst MODIFIER_KEYS = ['alt', 'control', 'meta', 'shift'];\n\nconst DOM_KEY_LOCATION_NUMPAD = 3;\n\n// Map to convert some key or keyIdentifier values to what will be returned by getEventKey\nconst _keyMap: {[k: string]: string} = {\n  // The following values are here for cross-browser compatibility and to match the W3C standard\n  // cf https://www.w3.org/TR/DOM-Level-3-Events-key/\n  '\\b': 'Backspace',\n  '\\t': 'Tab',\n  '\\x7F': 'Delete',\n  '\\x1B': 'Escape',\n  'Del': 'Delete',\n  'Esc': 'Escape',\n  'Left': 'ArrowLeft',\n  'Right': 'ArrowRight',\n  'Up': 'ArrowUp',\n  'Down': 'ArrowDown',\n  'Menu': 'ContextMenu',\n  'Scroll': 'ScrollLock',\n  'Win': 'OS'\n};\n\n// There is a bug in Chrome for numeric keypad keys:\n// https://code.google.com/p/chromium/issues/detail?id=155654\n// 1, 2, 3 ... are reported as A, B, C ...\nconst _chromeNumKeyPadMap = {\n  'A': '1',\n  'B': '2',\n  'C': '3',\n  'D': '4',\n  'E': '5',\n  'F': '6',\n  'G': '7',\n  'H': '8',\n  'I': '9',\n  'J': '*',\n  'K': '+',\n  'M': '-',\n  'N': '.',\n  'O': '/',\n  '\\x60': '0',\n  '\\x90': 'NumLock'\n};\n\n\n/**\n * Retrieves modifiers from key-event objects.\n */\nconst MODIFIER_KEY_GETTERS: {[key: string]: (event: KeyboardEvent) => boolean} = {\n  'alt': (event: KeyboardEvent) => event.altKey,\n  'control': (event: KeyboardEvent) => event.ctrlKey,\n  'meta': (event: KeyboardEvent) => event.metaKey,\n  'shift': (event: KeyboardEvent) => event.shiftKey\n};\n\n/**\n * @publicApi\n * A browser plug-in that provides support for handling of key events in Angular.\n */\n@Injectable()\nexport class KeyEventsPlugin extends EventManagerPlugin {\n  /**\n   * Initializes an instance of the browser plug-in.\n   * @param doc The document in which key events will be detected.\n   */\n  constructor(@Inject(DOCUMENT) doc: any) {\n    super(doc);\n  }\n\n  /**\n   * Reports whether a named key event is supported.\n   * @param eventName The event name to query.\n   * @return True if the named key event is supported.\n   */\n  override supports(eventName: string): boolean {\n    return KeyEventsPlugin.parseEventName(eventName) != null;\n  }\n\n  /**\n   * Registers a handler for a specific element and key event.\n   * @param element The HTML element to receive event notifications.\n   * @param eventName The name of the key event to listen for.\n   * @param handler A function to call when the notification occurs. Receives the\n   * event object as an argument.\n   * @returns The key event that was registered.\n   */\n  override addEventListener(element: HTMLElement, eventName: string, handler: Function): Function {\n    const parsedEvent = KeyEventsPlugin.parseEventName(eventName)!;\n\n    const outsideHandler =\n        KeyEventsPlugin.eventCallback(parsedEvent['fullKey'], handler, this.manager.getZone());\n\n    return this.manager.getZone().runOutsideAngular(() => {\n      return getDOM().onAndCancel(element, parsedEvent['domEventName'], outsideHandler);\n    });\n  }\n\n  static parseEventName(eventName: string): {fullKey: string, domEventName: string}|null {\n    const parts: string[] = eventName.toLowerCase().split('.');\n\n    const domEventName = parts.shift();\n    if ((parts.length === 0) || !(domEventName === 'keydown' || domEventName === 'keyup')) {\n      return null;\n    }\n\n    const key = KeyEventsPlugin._normalizeKey(parts.pop()!);\n\n    let fullKey = '';\n    MODIFIER_KEYS.forEach(modifierName => {\n      const index: number = parts.indexOf(modifierName);\n      if (index > -1) {\n        parts.splice(index, 1);\n        fullKey += modifierName + '.';\n      }\n    });\n    fullKey += key;\n\n    if (parts.length != 0 || key.length === 0) {\n      // returning null instead of throwing to let another plugin process the event\n      return null;\n    }\n\n    // NOTE: Please don't rewrite this as so, as it will break JSCompiler property renaming.\n    //       The code must remain in the `result['domEventName']` form.\n    // return {domEventName, fullKey};\n    const result: {fullKey: string, domEventName: string} = {} as any;\n    result['domEventName'] = domEventName;\n    result['fullKey'] = fullKey;\n    return result;\n  }\n\n  static getEventFullKey(event: KeyboardEvent): string {\n    let fullKey = '';\n    let key = getEventKey(event);\n    key = key.toLowerCase();\n    if (key === ' ') {\n      key = 'space';  // for readability\n    } else if (key === '.') {\n      key = 'dot';  // because '.' is used as a separator in event names\n    }\n    MODIFIER_KEYS.forEach(modifierName => {\n      if (modifierName != key) {\n        const modifierGetter = MODIFIER_KEY_GETTERS[modifierName];\n        if (modifierGetter(event)) {\n          fullKey += modifierName + '.';\n        }\n      }\n    });\n    fullKey += key;\n    return fullKey;\n  }\n\n  /**\n   * Configures a handler callback for a key event.\n   * @param fullKey The event name that combines all simultaneous keystrokes.\n   * @param handler The function that responds to the key event.\n   * @param zone The zone in which the event occurred.\n   * @returns A callback function.\n   */\n  static eventCallback(fullKey: any, handler: Function, zone: NgZone): Function {\n    return (event: any /** TODO #9100 */) => {\n      if (KeyEventsPlugin.getEventFullKey(event) === fullKey) {\n        zone.runGuarded(() => handler(event));\n      }\n    };\n  }\n\n  /** @internal */\n  static _normalizeKey(keyName: string): string {\n    // TODO: switch to a Map if the mapping grows too much\n    switch (keyName) {\n      case 'esc':\n        return 'escape';\n      default:\n        return keyName;\n    }\n  }\n}\n\nfunction getEventKey(event: any): string {\n  let key = event.key;\n  if (key == null) {\n    key = event.keyIdentifier;\n    // keyIdentifier is defined in the old draft of DOM Level 3 Events implemented by Chrome and\n    // Safari cf\n    // https://www.w3.org/TR/2007/WD-DOM-Level-3-Events-20071221/events.html#Events-KeyboardEvents-Interfaces\n    if (key == null) {\n      return 'Unidentified';\n    }\n    if (key.startsWith('U+')) {\n      key = String.fromCharCode(parseInt(key.substring(2), 16));\n      if (event.location === DOM_KEY_LOCATION_NUMPAD && _chromeNumKeyPadMap.hasOwnProperty(key)) {\n        // There is a bug in Chrome for numeric keypad keys:\n        // https://code.google.com/p/chromium/issues/detail?id=155654\n        // 1, 2, 3 ... are reported as A, B, C ...\n        key = (_chromeNumKeyPadMap as any)[key];\n      }\n    }\n  }\n\n  return _keyMap[key] || key;\n}\n"]} |
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