@angular/platform-browser
Version:
Angular - library for using Angular in a web browser
204 lines • 23.3 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 { DOCUMENT, ɵgetDOM as getDOM } from '@angular/common';
import { Inject, Injectable } from '@angular/core';
import { EventManagerPlugin } from './event_manager';
import * as i0 from "@angular/core";
/**
* Defines supported modifiers for key events.
*/
const MODIFIER_KEYS = ['alt', 'control', 'meta', 'shift'];
const DOM_KEY_LOCATION_NUMPAD = 3;
// Map to convert some key or keyIdentifier values to what will be returned by getEventKey
const _keyMap = {
// The following values are here for cross-browser compatibility and to match the W3C standard
// cf https://www.w3.org/TR/DOM-Level-3-Events-key/
'\b': 'Backspace',
'\t': 'Tab',
'\x7F': 'Delete',
'\x1B': 'Escape',
'Del': 'Delete',
'Esc': 'Escape',
'Left': 'ArrowLeft',
'Right': 'ArrowRight',
'Up': 'ArrowUp',
'Down': 'ArrowDown',
'Menu': 'ContextMenu',
'Scroll': 'ScrollLock',
'Win': 'OS'
};
// There is a bug in Chrome for numeric keypad keys:
// https://code.google.com/p/chromium/issues/detail?id=155654
// 1, 2, 3 ... are reported as A, B, C ...
const _chromeNumKeyPadMap = {
'A': '1',
'B': '2',
'C': '3',
'D': '4',
'E': '5',
'F': '6',
'G': '7',
'H': '8',
'I': '9',
'J': '*',
'K': '+',
'M': '-',
'N': '.',
'O': '/',
'\x60': '0',
'\x90': 'NumLock'
};
/**
* Retrieves modifiers from key-event objects.
*/
const MODIFIER_KEY_GETTERS = {
'alt': (event) => event.altKey,
'control': (event) => event.ctrlKey,
'meta': (event) => event.metaKey,
'shift': (event) => event.shiftKey
};
/**
* @publicApi
* A browser plug-in that provides support for handling of key events in Angular.
*/
export class KeyEventsPlugin extends EventManagerPlugin {
/**
* Initializes an instance of the browser plug-in.
* @param doc The document in which key events will be detected.
*/
constructor(doc) {
super(doc);
}
/**
* Reports whether a named key event is supported.
* @param eventName The event name to query.
* @return True if the named key event is supported.
*/
supports(eventName) {
return KeyEventsPlugin.parseEventName(eventName) != null;
}
/**
* Registers a handler for a specific element and key event.
* @param element The HTML element to receive event notifications.
* @param eventName The name of the key event to listen for.
* @param handler A function to call when the notification occurs. Receives the
* event object as an argument.
* @returns The key event that was registered.
*/
addEventListener(element, eventName, handler) {
const parsedEvent = KeyEventsPlugin.parseEventName(eventName);
const outsideHandler = KeyEventsPlugin.eventCallback(parsedEvent['fullKey'], handler, this.manager.getZone());
return this.manager.getZone().runOutsideAngular(() => {
return getDOM().onAndCancel(element, parsedEvent['domEventName'], outsideHandler);
});
}
static parseEventName(eventName) {
const parts = eventName.toLowerCase().split('.');
const domEventName = parts.shift();
if ((parts.length === 0) || !(domEventName === 'keydown' || domEventName === 'keyup')) {
return null;
}
const key = KeyEventsPlugin._normalizeKey(parts.pop());
let fullKey = '';
MODIFIER_KEYS.forEach(modifierName => {
const index = parts.indexOf(modifierName);
if (index > -1) {
parts.splice(index, 1);
fullKey += modifierName + '.';
}
});
fullKey += key;
if (parts.length != 0 || key.length === 0) {
// returning null instead of throwing to let another plugin process the event
return null;
}
// NOTE: Please don't rewrite this as so, as it will break JSCompiler property renaming.
// The code must remain in the `result['domEventName']` form.
// return {domEventName, fullKey};
const result = {};
result['domEventName'] = domEventName;
result['fullKey'] = fullKey;
return result;
}
static getEventFullKey(event) {
let fullKey = '';
let key = getEventKey(event);
key = key.toLowerCase();
if (key === ' ') {
key = 'space'; // for readability
}
else if (key === '.') {
key = 'dot'; // because '.' is used as a separator in event names
}
MODIFIER_KEYS.forEach(modifierName => {
if (modifierName != key) {
const modifierGetter = MODIFIER_KEY_GETTERS[modifierName];
if (modifierGetter(event)) {
fullKey += modifierName + '.';
}
}
});
fullKey += key;
return fullKey;
}
/**
* Configures a handler callback for a key event.
* @param fullKey The event name that combines all simultaneous keystrokes.
* @param handler The function that responds to the key event.
* @param zone The zone in which the event occurred.
* @returns A callback function.
*/
static eventCallback(fullKey, handler, zone) {
return (event /** TODO #9100 */) => {
if (KeyEventsPlugin.getEventFullKey(event) === fullKey) {
zone.runGuarded(() => handler(event));
}
};
}
/** @internal */
static _normalizeKey(keyName) {
// TODO: switch to a Map if the mapping grows too much
switch (keyName) {
case 'esc':
return 'escape';
default:
return keyName;
}
}
}
KeyEventsPlugin.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: KeyEventsPlugin, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });
KeyEventsPlugin.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: KeyEventsPlugin });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: KeyEventsPlugin, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }]; } });
function getEventKey(event) {
let key = event.key;
if (key == null) {
key = event.keyIdentifier;
// keyIdentifier is defined in the old draft of DOM Level 3 Events implemented by Chrome and
// Safari cf
// https://www.w3.org/TR/2007/WD-DOM-Level-3-Events-20071221/events.html#Events-KeyboardEvents-Interfaces
if (key == null) {
return 'Unidentified';
}
if (key.startsWith('U+')) {
key = String.fromCharCode(parseInt(key.substring(2), 16));
if (event.location === DOM_KEY_LOCATION_NUMPAD && _chromeNumKeyPadMap.hasOwnProperty(key)) {
// There is a bug in Chrome for numeric keypad keys:
// https://code.google.com/p/chromium/issues/detail?id=155654
// 1, 2, 3 ... are reported as A, B, C ...
key = _chromeNumKeyPadMap[key];
}
}
}
return _keyMap[key] || key;
}
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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"]}