542 lines
18 KiB
JavaScript
542 lines
18 KiB
JavaScript
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/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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* @format
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*/
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'use strict';
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exports.__esModule = true;
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exports.default = void 0;
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var DELAY = 'DELAY';
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var ERROR = 'ERROR';
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var LONG_PRESS_DETECTED = 'LONG_PRESS_DETECTED';
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var NOT_RESPONDER = 'NOT_RESPONDER';
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var RESPONDER_ACTIVE_LONG_PRESS_START = 'RESPONDER_ACTIVE_LONG_PRESS_START';
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var RESPONDER_ACTIVE_PRESS_START = 'RESPONDER_ACTIVE_PRESS_START';
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var RESPONDER_INACTIVE_PRESS_START = 'RESPONDER_INACTIVE_PRESS_START';
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var RESPONDER_GRANT = 'RESPONDER_GRANT';
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var RESPONDER_RELEASE = 'RESPONDER_RELEASE';
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var RESPONDER_TERMINATED = 'RESPONDER_TERMINATED';
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var Transitions = Object.freeze({
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NOT_RESPONDER: {
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DELAY: ERROR,
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RESPONDER_GRANT: RESPONDER_INACTIVE_PRESS_START,
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RESPONDER_RELEASE: ERROR,
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RESPONDER_TERMINATED: ERROR,
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LONG_PRESS_DETECTED: ERROR
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},
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RESPONDER_INACTIVE_PRESS_START: {
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DELAY: RESPONDER_ACTIVE_PRESS_START,
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RESPONDER_GRANT: ERROR,
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RESPONDER_RELEASE: NOT_RESPONDER,
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RESPONDER_TERMINATED: NOT_RESPONDER,
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LONG_PRESS_DETECTED: ERROR
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},
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RESPONDER_ACTIVE_PRESS_START: {
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DELAY: ERROR,
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RESPONDER_GRANT: ERROR,
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RESPONDER_RELEASE: NOT_RESPONDER,
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RESPONDER_TERMINATED: NOT_RESPONDER,
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LONG_PRESS_DETECTED: RESPONDER_ACTIVE_LONG_PRESS_START
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},
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RESPONDER_ACTIVE_LONG_PRESS_START: {
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DELAY: ERROR,
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RESPONDER_GRANT: ERROR,
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RESPONDER_RELEASE: NOT_RESPONDER,
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RESPONDER_TERMINATED: NOT_RESPONDER,
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LONG_PRESS_DETECTED: RESPONDER_ACTIVE_LONG_PRESS_START
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},
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ERROR: {
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DELAY: NOT_RESPONDER,
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RESPONDER_GRANT: RESPONDER_INACTIVE_PRESS_START,
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RESPONDER_RELEASE: NOT_RESPONDER,
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RESPONDER_TERMINATED: NOT_RESPONDER,
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LONG_PRESS_DETECTED: NOT_RESPONDER
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}
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});
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var isActiveSignal = function isActiveSignal(signal) {
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return signal === RESPONDER_ACTIVE_PRESS_START || signal === RESPONDER_ACTIVE_LONG_PRESS_START;
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};
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var isPressStartSignal = function isPressStartSignal(signal) {
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return signal === RESPONDER_INACTIVE_PRESS_START || signal === RESPONDER_ACTIVE_PRESS_START || signal === RESPONDER_ACTIVE_LONG_PRESS_START;
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};
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var isTerminalSignal = function isTerminalSignal(signal) {
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return signal === RESPONDER_TERMINATED || signal === RESPONDER_RELEASE;
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};
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var isValidKeyPress = function isValidKeyPress(event) {
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var key = event.key;
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var target = event.currentTarget;
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var role = target.getAttribute('role');
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var isSpacebar = key === ' ' || key === 'Spacebar';
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return !event.repeat && (key === 'Enter' || isSpacebar && (role === 'button' || role === 'menuitem'));
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};
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var DEFAULT_LONG_PRESS_DELAY_MS = 450; // 500 - 50
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var DEFAULT_PRESS_DELAY_MS = 50;
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/**
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* =========================== PressResponder Tutorial ===========================
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*
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* The `PressResponder` class helps you create press interactions by analyzing the
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* geometry of elements and observing when another responder (e.g. ScrollView)
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* has stolen the touch lock. It offers hooks for your component to provide
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* interaction feedback to the user:
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*
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* - When a press has activated (e.g. highlight an element)
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* - When a press has deactivated (e.g. un-highlight an element)
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* - When a press sould trigger an action, meaning it activated and deactivated
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* while within the geometry of the element without the lock being stolen.
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*
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* A high quality interaction isn't as simple as you might think. There should
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* be a slight delay before activation. Moving your finger beyond an element's
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* bounds should trigger deactivation, but moving the same finger back within an
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* element's bounds should trigger reactivation.
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*
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* In order to use `PressResponder`, do the following:
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*
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* const pressResponder = new PressResponder(config);
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*
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* 2. Choose the rendered component who should collect the press events. On that
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* element, spread `pressability.getEventHandlers()` into its props.
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*
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* return (
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* <View {...this.state.pressResponder.getEventHandlers()} />
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* );
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*
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* 3. Reset `PressResponder` when your component unmounts.
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*
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* componentWillUnmount() {
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* this.state.pressResponder.reset();
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* }
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*
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* ==================== Implementation Details ====================
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*
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* `PressResponder` only assumes that there exists a `HitRect` node. The `PressRect`
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* is an abstract box that is extended beyond the `HitRect`.
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*
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* # Geometry
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*
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* ┌────────────────────────┐
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* │ ┌──────────────────┐ │ - Presses start anywhere within `HitRect`.
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* │ │ ┌────────────┐ │ │
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* │ │ │ VisualRect │ │ │
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* │ │ └────────────┘ │ │ - When pressed down for sufficient amount of time
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* │ │ HitRect │ │ before letting up, `VisualRect` activates.
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* │ └──────────────────┘ │
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* │ Out Region o │
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* └────────────────────│───┘
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* └────── When the press is released outside the `HitRect`,
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* the responder is NOT eligible for a "press".
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*
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* # State Machine
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*
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* ┌───────────────┐ ◀──── RESPONDER_RELEASE
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* │ NOT_RESPONDER │
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* └───┬───────────┘ ◀──── RESPONDER_TERMINATED
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* │
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* │ RESPONDER_GRANT (HitRect)
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* │
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* ▼
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* ┌─────────────────────┐ ┌───────────────────┐ ┌───────────────────┐
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* │ RESPONDER_INACTIVE_ │ DELAY │ RESPONDER_ACTIVE_ │ T + DELAY │ RESPONDER_ACTIVE_ │
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* │ PRESS_START ├────────▶ │ PRESS_START ├────────────▶ │ LONG_PRESS_START │
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* └─────────────────────┘ └───────────────────┘ └───────────────────┘
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*
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* T + DELAY => LONG_PRESS_DELAY + DELAY
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*
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* Not drawn are the side effects of each transition. The most important side
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* effect is the invocation of `onLongPress`. Only when the browser produces a
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* `click` event is `onPress` invoked.
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*/
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var PressResponder =
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/*#__PURE__*/
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function () {
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function PressResponder(config) {
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this._eventHandlers = null;
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this._isPointerTouch = false;
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this._longPressDelayTimeout = null;
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this._longPressDispatched = false;
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this._pressDelayTimeout = null;
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this._pressOutDelayTimeout = null;
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this._touchState = NOT_RESPONDER;
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this.configure(config);
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}
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var _proto = PressResponder.prototype;
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_proto.configure = function configure(config) {
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this._config = config;
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}
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/**
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* Resets any pending timers. This should be called on unmount.
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*/
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;
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_proto.reset = function reset() {
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this._cancelLongPressDelayTimeout();
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this._cancelPressDelayTimeout();
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this._cancelPressOutDelayTimeout();
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}
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/**
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* Returns a set of props to spread into the interactive element.
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*/
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;
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_proto.getEventHandlers = function getEventHandlers() {
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if (this._eventHandlers == null) {
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this._eventHandlers = this._createEventHandlers();
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}
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return this._eventHandlers;
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};
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_proto._createEventHandlers = function _createEventHandlers() {
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var _this = this;
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var start = function start(event, shouldDelay) {
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event.persist();
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_this._cancelPressOutDelayTimeout();
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_this._longPressDispatched = false;
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_this._responder = event.currentTarget;
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_this._selectionTerminated = false;
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_this._touchState = NOT_RESPONDER;
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_this._isPointerTouch = event.nativeEvent.type === 'touchstart';
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_this._receiveSignal(RESPONDER_GRANT, event);
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var delayPressStart = normalizeDelay(_this._config.delayPressStart, 0, DEFAULT_PRESS_DELAY_MS);
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if (shouldDelay !== false && delayPressStart > 0) {
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_this._pressDelayTimeout = setTimeout(function () {
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_this._receiveSignal(DELAY, event);
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}, delayPressStart);
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} else {
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_this._receiveSignal(DELAY, event);
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}
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var delayLongPress = normalizeDelay(_this._config.delayLongPress, 10, DEFAULT_LONG_PRESS_DELAY_MS);
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_this._longPressDelayTimeout = setTimeout(function () {
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_this._handleLongPress(event);
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}, delayLongPress + delayPressStart);
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};
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var end = function end(event) {
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_this._receiveSignal(RESPONDER_RELEASE, event);
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};
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var keyupHandler = function keyupHandler(event) {
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if (_this._touchState !== NOT_RESPONDER) {
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end(event);
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document.removeEventListener('keyup', keyupHandler);
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}
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};
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return {
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onStartShouldSetResponder: function onStartShouldSetResponder() {
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var disabled = _this._config.disabled;
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if (disabled == null) {
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return true;
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}
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return !disabled;
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},
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onKeyDown: function onKeyDown(event) {
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if (isValidKeyPress(event)) {
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if (_this._touchState === NOT_RESPONDER) {
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start(event, false); // Listen to 'keyup' on document to account for situations where
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// focus is moved to another element during 'keydown'.
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document.addEventListener('keyup', keyupHandler);
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}
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event.stopPropagation();
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}
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},
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onResponderGrant: function onResponderGrant(event) {
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return start(event);
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},
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onResponderMove: function onResponderMove(event) {
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if (_this._config.onPressMove != null) {
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_this._config.onPressMove(event);
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}
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var touch = getTouchFromResponderEvent(event);
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if (_this._touchActivatePosition != null) {
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var deltaX = _this._touchActivatePosition.pageX - touch.pageX;
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var deltaY = _this._touchActivatePosition.pageY - touch.pageY;
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if (Math.hypot(deltaX, deltaY) > 10) {
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_this._cancelLongPressDelayTimeout();
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}
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}
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},
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onResponderRelease: function onResponderRelease(event) {
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return end(event);
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},
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onResponderTerminate: function onResponderTerminate(event) {
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if (event.nativeEvent.type === 'selectionchange') {
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_this._selectionTerminated = true;
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}
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_this._receiveSignal(RESPONDER_TERMINATED, event);
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},
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onResponderTerminationRequest: function onResponderTerminationRequest(event) {
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var _this$_config = _this._config,
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cancelable = _this$_config.cancelable,
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disabled = _this$_config.disabled,
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onLongPress = _this$_config.onLongPress; // If `onLongPress` is provided, don't terminate on `contextmenu` as default
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// behavior will be prevented for non-mouse pointers.
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if (!disabled && onLongPress != null && _this._isPointerTouch && event.nativeEvent.type === 'contextmenu') {
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return false;
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}
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if (cancelable == null) {
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return true;
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}
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return cancelable;
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},
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// NOTE: this diverges from react-native in 3 significant ways:
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// * The `onPress` callback is not connected to the responder system (the native
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// `click` event must be used but is dispatched in many scenarios where no pointers
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// are on the screen.) Therefore, it's possible for `onPress` to be called without
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// `onPress{Start,End}` being called first.
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// * The `onPress` callback is only be called on the first ancestor of the native
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// `click` target that is using the PressResponder.
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// * The event's `nativeEvent` is a `MouseEvent` not a `TouchEvent`.
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onClick: function onClick(event) {
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var _this$_config2 = _this._config,
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disabled = _this$_config2.disabled,
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onPress = _this$_config2.onPress;
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if (!disabled) {
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// If long press dispatched, cancel default click behavior.
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// If the responder terminated because text was selected during the gesture,
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// cancel the default click behavior.
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if (_this._longPressDispatched || _this._selectionTerminated) {
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event.preventDefault();
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} else if (onPress != null && event.ctrlKey === false && event.altKey === false) {
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onPress(event);
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}
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}
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event.stopPropagation();
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},
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// If `onLongPress` is provided and a touch pointer is being used, prevent the
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// default context menu from opening.
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onContextMenu: function onContextMenu(event) {
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var _this$_config3 = _this._config,
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disabled = _this$_config3.disabled,
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onLongPress = _this$_config3.onLongPress;
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if (!disabled && onLongPress != null && _this._isPointerTouch && !event.defaultPrevented) {
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event.preventDefault();
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}
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event.stopPropagation();
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}
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};
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}
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/**
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* Receives a state machine signal, performs side effects of the transition
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* and stores the new state. Validates the transition as well.
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*/
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;
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_proto._receiveSignal = function _receiveSignal(signal, event) {
|
||
|
|
var prevState = this._touchState;
|
||
|
|
var nextState = null;
|
||
|
|
|
||
|
|
if (Transitions[prevState] != null) {
|
||
|
|
nextState = Transitions[prevState][signal];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this._responder == null && signal === RESPONDER_RELEASE) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (nextState == null || nextState === ERROR) {
|
||
|
|
console.error("PressResponder: Invalid signal " + signal + " for state " + prevState + " on responder");
|
||
|
|
} else if (prevState !== nextState) {
|
||
|
|
this._performTransitionSideEffects(prevState, nextState, signal, event);
|
||
|
|
|
||
|
|
this._touchState = nextState;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Performs a transition between touchable states and identify any activations
|
||
|
|
* or deactivations (and callback invocations).
|
||
|
|
*/
|
||
|
|
;
|
||
|
|
|
||
|
|
_proto._performTransitionSideEffects = function _performTransitionSideEffects(prevState, nextState, signal, event) {
|
||
|
|
if (isTerminalSignal(signal)) {
|
||
|
|
this._isPointerTouch = false;
|
||
|
|
this._touchActivatePosition = null;
|
||
|
|
|
||
|
|
this._cancelLongPressDelayTimeout();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isPressStartSignal(prevState) && signal === LONG_PRESS_DETECTED) {
|
||
|
|
var onLongPress = this._config.onLongPress; // Long press is not supported for keyboards because 'click' can be dispatched
|
||
|
|
// immediately (and multiple times) after 'keydown'.
|
||
|
|
|
||
|
|
if (onLongPress != null && event.nativeEvent.key == null) {
|
||
|
|
onLongPress(event);
|
||
|
|
this._longPressDispatched = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var isPrevActive = isActiveSignal(prevState);
|
||
|
|
var isNextActive = isActiveSignal(nextState);
|
||
|
|
|
||
|
|
if (!isPrevActive && isNextActive) {
|
||
|
|
this._activate(event);
|
||
|
|
} else if (isPrevActive && !isNextActive) {
|
||
|
|
this._deactivate(event);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isPressStartSignal(prevState) && signal === RESPONDER_RELEASE) {
|
||
|
|
var _this$_config4 = this._config,
|
||
|
|
_onLongPress = _this$_config4.onLongPress,
|
||
|
|
onPress = _this$_config4.onPress;
|
||
|
|
|
||
|
|
if (onPress != null) {
|
||
|
|
var isPressCanceledByLongPress = _onLongPress != null && prevState === RESPONDER_ACTIVE_LONG_PRESS_START;
|
||
|
|
|
||
|
|
if (!isPressCanceledByLongPress) {
|
||
|
|
// If we never activated (due to delays), activate and deactivate now.
|
||
|
|
if (!isNextActive && !isPrevActive) {
|
||
|
|
this._activate(event);
|
||
|
|
|
||
|
|
this._deactivate(event);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
this._cancelPressDelayTimeout();
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._activate = function _activate(event) {
|
||
|
|
var _this$_config5 = this._config,
|
||
|
|
onPressChange = _this$_config5.onPressChange,
|
||
|
|
onPressStart = _this$_config5.onPressStart;
|
||
|
|
var touch = getTouchFromResponderEvent(event);
|
||
|
|
this._touchActivatePosition = {
|
||
|
|
pageX: touch.pageX,
|
||
|
|
pageY: touch.pageY
|
||
|
|
};
|
||
|
|
|
||
|
|
if (onPressStart != null) {
|
||
|
|
onPressStart(event);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (onPressChange != null) {
|
||
|
|
onPressChange(true);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._deactivate = function _deactivate(event) {
|
||
|
|
var _this$_config6 = this._config,
|
||
|
|
onPressChange = _this$_config6.onPressChange,
|
||
|
|
onPressEnd = _this$_config6.onPressEnd;
|
||
|
|
|
||
|
|
function end() {
|
||
|
|
if (onPressEnd != null) {
|
||
|
|
onPressEnd(event);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (onPressChange != null) {
|
||
|
|
onPressChange(false);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var delayPressEnd = normalizeDelay(this._config.delayPressEnd);
|
||
|
|
|
||
|
|
if (delayPressEnd > 0) {
|
||
|
|
this._pressOutDelayTimeout = setTimeout(function () {
|
||
|
|
end();
|
||
|
|
}, delayPressEnd);
|
||
|
|
} else {
|
||
|
|
end();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._handleLongPress = function _handleLongPress(event) {
|
||
|
|
if (this._touchState === RESPONDER_ACTIVE_PRESS_START || this._touchState === RESPONDER_ACTIVE_LONG_PRESS_START) {
|
||
|
|
this._receiveSignal(LONG_PRESS_DETECTED, event);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._cancelLongPressDelayTimeout = function _cancelLongPressDelayTimeout() {
|
||
|
|
if (this._longPressDelayTimeout != null) {
|
||
|
|
clearTimeout(this._longPressDelayTimeout);
|
||
|
|
this._longPressDelayTimeout = null;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._cancelPressDelayTimeout = function _cancelPressDelayTimeout() {
|
||
|
|
if (this._pressDelayTimeout != null) {
|
||
|
|
clearTimeout(this._pressDelayTimeout);
|
||
|
|
this._pressDelayTimeout = null;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_proto._cancelPressOutDelayTimeout = function _cancelPressOutDelayTimeout() {
|
||
|
|
if (this._pressOutDelayTimeout != null) {
|
||
|
|
clearTimeout(this._pressOutDelayTimeout);
|
||
|
|
this._pressOutDelayTimeout = null;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
return PressResponder;
|
||
|
|
}();
|
||
|
|
|
||
|
|
exports.default = PressResponder;
|
||
|
|
|
||
|
|
function normalizeDelay(delay, min, fallback) {
|
||
|
|
if (min === void 0) {
|
||
|
|
min = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fallback === void 0) {
|
||
|
|
fallback = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Math.max(min, delay !== null && delay !== void 0 ? delay : fallback);
|
||
|
|
}
|
||
|
|
|
||
|
|
function getTouchFromResponderEvent(event) {
|
||
|
|
var _event$nativeEvent = event.nativeEvent,
|
||
|
|
changedTouches = _event$nativeEvent.changedTouches,
|
||
|
|
touches = _event$nativeEvent.touches;
|
||
|
|
|
||
|
|
if (touches != null && touches.length > 0) {
|
||
|
|
return touches[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (changedTouches != null && changedTouches.length > 0) {
|
||
|
|
return changedTouches[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
return event.nativeEvent;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = exports.default;
|