@angular/cdk
Version:
Angular Material Component Development Kit
116 lines • 14.4 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
*/
/** Used to generate unique IDs for events. */
let uniqueIds = 0;
/**
* Creates a browser MouseEvent with the specified options.
* @docs-private
*/
export function createMouseEvent(type, clientX = 0, clientY = 0, button = 0, modifiers = {}) {
// Note: We cannot determine the position of the mouse event based on the screen
// because the dimensions and position of the browser window are not available
// To provide reasonable `screenX` and `screenY` coordinates, we simply use the
// client coordinates as if the browser is opened in fullscreen.
const screenX = clientX;
const screenY = clientY;
const event = new MouseEvent(type, {
bubbles: true,
cancelable: true,
composed: true,
view: window,
detail: 0,
relatedTarget: null,
screenX,
screenY,
clientX,
clientY,
ctrlKey: modifiers.control,
altKey: modifiers.alt,
shiftKey: modifiers.shift,
metaKey: modifiers.meta,
button: button,
buttons: 1,
});
// The `MouseEvent` constructor doesn't allow us to pass these properties into the constructor.
// Override them to `1`, because they're used for fake screen reader event detection.
defineReadonlyEventProperty(event, 'offsetX', 1);
defineReadonlyEventProperty(event, 'offsetY', 1);
return event;
}
/**
* Creates a browser `PointerEvent` with the specified options. Pointer events
* by default will appear as if they are the primary pointer of their type.
* https://www.w3.org/TR/pointerevents2/#dom-pointerevent-isprimary.
*
* For example, if pointer events for a multi-touch interaction are created, the non-primary
* pointer touches would need to be represented by non-primary pointer events.
*
* @docs-private
*/
export function createPointerEvent(type, clientX = 0, clientY = 0, options = { isPrimary: true }) {
return new PointerEvent(type, {
bubbles: true,
cancelable: true,
composed: true,
view: window,
clientX,
clientY,
...options,
});
}
/**
* Creates a browser TouchEvent with the specified pointer coordinates.
* @docs-private
*/
export function createTouchEvent(type, pageX = 0, pageY = 0, clientX = 0, clientY = 0) {
// We cannot use the `TouchEvent` or `Touch` because Firefox and Safari lack support.
// TODO: Switch to the constructor API when it is available for Firefox and Safari.
const event = document.createEvent('UIEvent');
const touchDetails = { pageX, pageY, clientX, clientY, identifier: uniqueIds++ };
// TS3.6 removes the initUIEvent method and suggests porting to "new UIEvent()".
event.initUIEvent(type, true, true, window, 0);
// Most of the browsers don't have a "initTouchEvent" method that can be used to define
// the touch details.
defineReadonlyEventProperty(event, 'touches', [touchDetails]);
defineReadonlyEventProperty(event, 'targetTouches', [touchDetails]);
defineReadonlyEventProperty(event, 'changedTouches', [touchDetails]);
return event;
}
/**
* Creates a keyboard event with the specified key and modifiers.
* @docs-private
*/
export function createKeyboardEvent(type, keyCode = 0, key = '', modifiers = {}) {
return new KeyboardEvent(type, {
bubbles: true,
cancelable: true,
composed: true,
view: window,
keyCode: keyCode,
key: key,
shiftKey: modifiers.shift,
metaKey: modifiers.meta,
altKey: modifiers.alt,
ctrlKey: modifiers.control,
});
}
/**
* Creates a fake event object with any desired event type.
* @docs-private
*/
export function createFakeEvent(type, bubbles = false, cancelable = true, composed = true) {
return new Event(type, { bubbles, cancelable, composed });
}
/**
* Defines a readonly property on the given event object. Readonly properties on an event object
* are always set as configurable as that matches default readonly properties for DOM event objects.
*/
function defineReadonlyEventProperty(event, propertyName, value) {
Object.defineProperty(event, propertyName, { get: () => value, configurable: true });
}
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Pointer events\n * by default will appear as if they are the primary pointer of their type.\n * https://www.w3.org/TR/pointerevents2/#dom-pointerevent-isprimary.\n *\n * For example, if pointer events for a multi-touch interaction are created, the non-primary\n * pointer touches would need to be represented by non-primary pointer events.\n *\n * @docs-private\n */\nexport function createPointerEvent(\n  type: string,\n  clientX = 0,\n  clientY = 0,\n  options: PointerEventInit = {isPrimary: true},\n) {\n  return new PointerEvent(type, {\n    bubbles: true,\n    cancelable: true,\n    composed: true, // Required for shadow DOM events.\n    view: window,\n    clientX,\n    clientY,\n    ...options,\n  });\n}\n\n/**\n * Creates a browser TouchEvent with the specified pointer coordinates.\n * @docs-private\n */\nexport function createTouchEvent(type: string, pageX = 0, pageY = 0, clientX = 0, clientY = 0) {\n  // We cannot use the `TouchEvent` or `Touch` because Firefox and Safari lack support.\n  // TODO: Switch to the constructor API when it is available for Firefox and Safari.\n  const event = document.createEvent('UIEvent');\n  const touchDetails = {pageX, pageY, clientX, clientY, identifier: uniqueIds++};\n\n  // TS3.6 removes the initUIEvent method and suggests porting to \"new UIEvent()\".\n  (event as any).initUIEvent(type, true, true, window, 0);\n\n  // Most of the browsers don't have a \"initTouchEvent\" method that can be used to define\n  // the touch details.\n  defineReadonlyEventProperty(event, 'touches', [touchDetails]);\n  defineReadonlyEventProperty(event, 'targetTouches', [touchDetails]);\n  defineReadonlyEventProperty(event, 'changedTouches', [touchDetails]);\n\n  return event;\n}\n\n/**\n * Creates a keyboard event with the specified key and modifiers.\n * @docs-private\n */\nexport function createKeyboardEvent(\n  type: string,\n  keyCode: number = 0,\n  key: string = '',\n  modifiers: ModifierKeys = {},\n) {\n  return new KeyboardEvent(type, {\n    bubbles: true,\n    cancelable: true,\n    composed: true, // Required for shadow DOM events.\n    view: window,\n    keyCode: keyCode,\n    key: key,\n    shiftKey: modifiers.shift,\n    metaKey: modifiers.meta,\n    altKey: modifiers.alt,\n    ctrlKey: modifiers.control,\n  });\n}\n\n/**\n * Creates a fake event object with any desired event type.\n * @docs-private\n */\nexport function createFakeEvent(type: string, bubbles = false, cancelable = true, composed = true) {\n  return new Event(type, {bubbles, cancelable, composed});\n}\n\n/**\n * Defines a readonly property on the given event object. Readonly properties on an event object\n * are always set as configurable as that matches default readonly properties for DOM event objects.\n */\nfunction defineReadonlyEventProperty(event: Event, propertyName: string, value: any) {\n  Object.defineProperty(event, propertyName, {get: () => value, configurable: true});\n}\n"]}