@angular/cdk
Version:
Angular Material Component Development Kit
88 lines • 13.6 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 { PERIOD } from '@angular/cdk/keycodes';
import { dispatchFakeEvent, dispatchKeyboardEvent } from './dispatch-events';
import { triggerFocus } from './element-focus';
/** Input types for which the value can be entered incrementally. */
const incrementalInputTypes = new Set([
'text',
'email',
'hidden',
'password',
'search',
'tel',
'url',
]);
/**
* Checks whether the given Element is a text input element.
* @docs-private
*/
export function isTextInput(element) {
const nodeName = element.nodeName.toLowerCase();
return nodeName === 'input' || nodeName === 'textarea';
}
export function typeInElement(element, ...modifiersAndKeys) {
const first = modifiersAndKeys[0];
let modifiers;
let rest;
if (typeof first !== 'string' && first.keyCode === undefined && first.key === undefined) {
modifiers = first;
rest = modifiersAndKeys.slice(1);
}
else {
modifiers = {};
rest = modifiersAndKeys;
}
const isInput = isTextInput(element);
const inputType = element.getAttribute('type') || 'text';
const keys = rest
.map(k => typeof k === 'string'
? k.split('').map(c => ({ keyCode: c.toUpperCase().charCodeAt(0), key: c }))
: [k])
.reduce((arr, k) => arr.concat(k), []);
// We simulate the user typing in a value by incrementally assigning the value below. The problem
// is that for some input types, the browser won't allow for an invalid value to be set via the
// `value` property which will always be the case when going character-by-character. If we detect
// such an input, we have to set the value all at once or listeners to the `input` event (e.g.
// the `ReactiveFormsModule` uses such an approach) won't receive the correct value.
const enterValueIncrementally = inputType === 'number' && keys.length > 0
? // The value can be set character by character in number inputs if it doesn't have any decimals.
keys.every(key => key.key !== '.' && key.keyCode !== PERIOD)
: incrementalInputTypes.has(inputType);
triggerFocus(element);
// When we aren't entering the value incrementally, assign it all at once ahead
// of time so that any listeners to the key events below will have access to it.
if (!enterValueIncrementally) {
element.value = keys.reduce((value, key) => value + (key.key || ''), '');
}
for (const key of keys) {
dispatchKeyboardEvent(element, 'keydown', key.keyCode, key.key, modifiers);
dispatchKeyboardEvent(element, 'keypress', key.keyCode, key.key, modifiers);
if (isInput && key.key && key.key.length === 1) {
if (enterValueIncrementally) {
element.value += key.key;
dispatchFakeEvent(element, 'input');
}
}
dispatchKeyboardEvent(element, 'keyup', key.keyCode, key.key, modifiers);
}
// Since we weren't dispatching `input` events while sending the keys, we have to do it now.
if (!enterValueIncrementally) {
dispatchFakeEvent(element, 'input');
}
}
/**
* Clears the text in an input or textarea element.
* @docs-private
*/
export function clearElement(element) {
triggerFocus(element);
element.value = '';
dispatchFakeEvent(element, 'input');
}
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key?: string})[]\n): void;\n\n/**\n * Focuses an input, sets its value and dispatches\n * the `input` event, simulating the user typing.\n * @param element Element onto which to set the value.\n * @param modifiers Modifier keys that are held while typing.\n * @param keys The keys to send to the element.\n * @docs-private\n */\nexport function typeInElement(\n  element: HTMLElement,\n  modifiers: ModifierKeys,\n  ...keys: (string | {keyCode?: number; key?: string})[]\n): void;\n\nexport function typeInElement(element: HTMLElement, ...modifiersAndKeys: any) {\n  const first = modifiersAndKeys[0];\n  let modifiers: ModifierKeys;\n  let rest: (string | {keyCode?: number; key?: string})[];\n  if (typeof first !== 'string' && first.keyCode === undefined && first.key === undefined) {\n    modifiers = first;\n    rest = modifiersAndKeys.slice(1);\n  } else {\n    modifiers = {};\n    rest = modifiersAndKeys;\n  }\n  const isInput = isTextInput(element);\n  const inputType = element.getAttribute('type') || 'text';\n  const keys: {keyCode?: number; key?: string}[] = rest\n    .map(k =>\n      typeof k === 'string'\n        ? k.split('').map(c => ({keyCode: c.toUpperCase().charCodeAt(0), key: c}))\n        : [k],\n    )\n    .reduce((arr, k) => arr.concat(k), []);\n\n  // We simulate the user typing in a value by incrementally assigning the value below. The problem\n  // is that for some input types, the browser won't allow for an invalid value to be set via the\n  // `value` property which will always be the case when going character-by-character. If we detect\n  // such an input, we have to set the value all at once or listeners to the `input` event (e.g.\n  // the `ReactiveFormsModule` uses such an approach) won't receive the correct value.\n  const enterValueIncrementally =\n    inputType === 'number' && keys.length > 0\n      ? // The value can be set character by character in number inputs if it doesn't have any decimals.\n        keys.every(key => key.key !== '.' && key.keyCode !== PERIOD)\n      : incrementalInputTypes.has(inputType);\n\n  triggerFocus(element);\n\n  // When we aren't entering the value incrementally, assign it all at once ahead\n  // of time so that any listeners to the key events below will have access to it.\n  if (!enterValueIncrementally) {\n    (element as HTMLInputElement).value = keys.reduce((value, key) => value + (key.key || ''), '');\n  }\n\n  for (const key of keys) {\n    dispatchKeyboardEvent(element, 'keydown', key.keyCode, key.key, modifiers);\n    dispatchKeyboardEvent(element, 'keypress', key.keyCode, key.key, modifiers);\n    if (isInput && key.key && key.key.length === 1) {\n      if (enterValueIncrementally) {\n        (element as HTMLInputElement | HTMLTextAreaElement).value += key.key;\n        dispatchFakeEvent(element, 'input');\n      }\n    }\n    dispatchKeyboardEvent(element, 'keyup', key.keyCode, key.key, modifiers);\n  }\n\n  // Since we weren't dispatching `input` events while sending the keys, we have to do it now.\n  if (!enterValueIncrementally) {\n    dispatchFakeEvent(element, 'input');\n  }\n}\n\n/**\n * Clears the text in an input or textarea element.\n * @docs-private\n */\nexport function clearElement(element: HTMLInputElement | HTMLTextAreaElement) {\n  triggerFocus(element as HTMLElement);\n  element.value = '';\n  dispatchFakeEvent(element, 'input');\n}\n"]}