mirror of
https://github.com/status-im/react-native.git
synced 2025-01-10 01:25:39 +00:00
0082517a6c
Summary: Currently, text inputs do not scroll when inside other components like scroll views. This fixes it by blocking any parent native component from taking the responder when the text input is focused and is being scrolled. This fixes the previous implementation, where the scroll view was not able to scroll on top of other text inputs, even though they were not focused. This makes the component similar to it's ios counterpart. Reviewed By: foghina Differential Revision: D3735237 fbshipit-source-id: 0e56b2bbd3f5636540b4c3cc7cc13aa0f4d2737e
762 lines
28 KiB
JavaScript
762 lines
28 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule Touchable
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*/
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'use strict';
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const BoundingDimensions = require('BoundingDimensions');
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const Position = require('Position');
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const React = require('React'); // eslint-disable-line no-unused-vars
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const TouchEventUtils = require('fbjs/lib/TouchEventUtils');
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const View = require('View');
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const keyMirror = require('fbjs/lib/keyMirror');
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const normalizeColor = require('normalizeColor');
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const queryLayoutByID = require('queryLayoutByID');
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/**
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* `Touchable`: Taps done right.
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*
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* You hook your `ResponderEventPlugin` events into `Touchable`. `Touchable`
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* will measure time/geometry and tells you when to give feedback to the user.
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*
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* ====================== Touchable Tutorial ===============================
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* The `Touchable` mixin helps you handle the "press" interaction. It analyzes
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* the geometry of elements, and observes when another responder (scroll view
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* etc) has stolen the touch lock. It notifies your component when it should
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* give feedback to the user. (bouncing/highlighting/unhighlighting).
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*
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* - When a touch was activated (typically you highlight)
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* - When a touch was deactivated (typically you unhighlight)
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* - When a touch was "pressed" - a touch ended while still within the geometry
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* of the element, and no other element (like scroller) has "stolen" touch
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* lock ("responder") (Typically you bounce the element).
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*
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* A good tap interaction isn't as simple as you might think. There should be a
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* slight delay before showing a highlight when starting a touch. If a
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* subsequent touch move exceeds the boundary of the element, it should
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* unhighlight, but if that same touch is brought back within the boundary, it
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* should rehighlight again. A touch can move in and out of that boundary
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* several times, each time toggling highlighting, but a "press" is only
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* triggered if that touch ends while within the element's boundary and no
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* scroller (or anything else) has stolen the lock on touches.
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*
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* To create a new type of component that handles interaction using the
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* `Touchable` mixin, do the following:
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*
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* - Initialize the `Touchable` state.
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*
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* getInitialState: function() {
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* return merge(this.touchableGetInitialState(), yourComponentState);
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* }
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*
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* - Choose the rendered component who's touches should start the interactive
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* sequence. On that rendered node, forward all `Touchable` responder
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* handlers. You can choose any rendered node you like. Choose a node whose
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* hit target you'd like to instigate the interaction sequence:
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*
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* // In render function:
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* return (
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* <View
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* onStartShouldSetResponder={this.touchableHandleStartShouldSetResponder}
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* onResponderTerminationRequest={this.touchableHandleResponderTerminationRequest}
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* onResponderGrant={this.touchableHandleResponderGrant}
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* onResponderMove={this.touchableHandleResponderMove}
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* onResponderRelease={this.touchableHandleResponderRelease}
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* onResponderTerminate={this.touchableHandleResponderTerminate}>
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* <View>
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* Even though the hit detection/interactions are triggered by the
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* wrapping (typically larger) node, we usually end up implementing
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* custom logic that highlights this inner one.
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* </View>
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* </View>
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* );
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*
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* - You may set up your own handlers for each of these events, so long as you
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* also invoke the `touchable*` handlers inside of your custom handler.
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*
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* - Implement the handlers on your component class in order to provide
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* feedback to the user. See documentation for each of these class methods
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* that you should implement.
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*
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* touchableHandlePress: function() {
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* this.performBounceAnimation(); // or whatever you want to do.
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* },
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* touchableHandleActivePressIn: function() {
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* this.beginHighlighting(...); // Whatever you like to convey activation
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* },
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* touchableHandleActivePressOut: function() {
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* this.endHighlighting(...); // Whatever you like to convey deactivation
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* },
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*
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* - There are more advanced methods you can implement (see documentation below):
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* touchableGetHighlightDelayMS: function() {
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* return 20;
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* }
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* // In practice, *always* use a predeclared constant (conserve memory).
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* touchableGetPressRectOffset: function() {
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* return {top: 20, left: 20, right: 20, bottom: 100};
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* }
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*/
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/**
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* Touchable states.
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*/
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var States = keyMirror({
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NOT_RESPONDER: null, // Not the responder
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RESPONDER_INACTIVE_PRESS_IN: null, // Responder, inactive, in the `PressRect`
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RESPONDER_INACTIVE_PRESS_OUT: null, // Responder, inactive, out of `PressRect`
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RESPONDER_ACTIVE_PRESS_IN: null, // Responder, active, in the `PressRect`
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RESPONDER_ACTIVE_PRESS_OUT: null, // Responder, active, out of `PressRect`
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RESPONDER_ACTIVE_LONG_PRESS_IN: null, // Responder, active, in the `PressRect`, after long press threshold
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RESPONDER_ACTIVE_LONG_PRESS_OUT: null, // Responder, active, out of `PressRect`, after long press threshold
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ERROR: null
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});
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/**
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* Quick lookup map for states that are considered to be "active"
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*/
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var IsActive = {
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RESPONDER_ACTIVE_PRESS_OUT: true,
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RESPONDER_ACTIVE_PRESS_IN: true
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};
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/**
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* Quick lookup for states that are considered to be "pressing" and are
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* therefore eligible to result in a "selection" if the press stops.
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*/
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var IsPressingIn = {
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RESPONDER_INACTIVE_PRESS_IN: true,
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RESPONDER_ACTIVE_PRESS_IN: true,
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RESPONDER_ACTIVE_LONG_PRESS_IN: true,
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};
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var IsLongPressingIn = {
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RESPONDER_ACTIVE_LONG_PRESS_IN: true,
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};
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/**
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* Inputs to the state machine.
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*/
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var Signals = keyMirror({
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DELAY: null,
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RESPONDER_GRANT: null,
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RESPONDER_RELEASE: null,
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RESPONDER_TERMINATED: null,
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ENTER_PRESS_RECT: null,
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LEAVE_PRESS_RECT: null,
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LONG_PRESS_DETECTED: null,
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});
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/**
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* Mapping from States x Signals => States
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*/
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var Transitions = {
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NOT_RESPONDER: {
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DELAY: States.ERROR,
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RESPONDER_GRANT: States.RESPONDER_INACTIVE_PRESS_IN,
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RESPONDER_RELEASE: States.ERROR,
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RESPONDER_TERMINATED: States.ERROR,
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ENTER_PRESS_RECT: States.ERROR,
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LEAVE_PRESS_RECT: States.ERROR,
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LONG_PRESS_DETECTED: States.ERROR,
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},
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RESPONDER_INACTIVE_PRESS_IN: {
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DELAY: States.RESPONDER_ACTIVE_PRESS_IN,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_INACTIVE_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_INACTIVE_PRESS_OUT,
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LONG_PRESS_DETECTED: States.ERROR,
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},
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RESPONDER_INACTIVE_PRESS_OUT: {
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DELAY: States.RESPONDER_ACTIVE_PRESS_OUT,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_INACTIVE_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_INACTIVE_PRESS_OUT,
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LONG_PRESS_DETECTED: States.ERROR,
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},
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RESPONDER_ACTIVE_PRESS_IN: {
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DELAY: States.ERROR,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_ACTIVE_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_ACTIVE_PRESS_OUT,
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LONG_PRESS_DETECTED: States.RESPONDER_ACTIVE_LONG_PRESS_IN,
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},
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RESPONDER_ACTIVE_PRESS_OUT: {
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DELAY: States.ERROR,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_ACTIVE_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_ACTIVE_PRESS_OUT,
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LONG_PRESS_DETECTED: States.ERROR,
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},
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RESPONDER_ACTIVE_LONG_PRESS_IN: {
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DELAY: States.ERROR,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_ACTIVE_LONG_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_ACTIVE_LONG_PRESS_OUT,
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LONG_PRESS_DETECTED: States.RESPONDER_ACTIVE_LONG_PRESS_IN,
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},
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RESPONDER_ACTIVE_LONG_PRESS_OUT: {
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DELAY: States.ERROR,
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RESPONDER_GRANT: States.ERROR,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.RESPONDER_ACTIVE_LONG_PRESS_IN,
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LEAVE_PRESS_RECT: States.RESPONDER_ACTIVE_LONG_PRESS_OUT,
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LONG_PRESS_DETECTED: States.ERROR,
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},
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error: {
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DELAY: States.NOT_RESPONDER,
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RESPONDER_GRANT: States.RESPONDER_INACTIVE_PRESS_IN,
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RESPONDER_RELEASE: States.NOT_RESPONDER,
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RESPONDER_TERMINATED: States.NOT_RESPONDER,
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ENTER_PRESS_RECT: States.NOT_RESPONDER,
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LEAVE_PRESS_RECT: States.NOT_RESPONDER,
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LONG_PRESS_DETECTED: States.NOT_RESPONDER,
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}
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};
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// ==== Typical Constants for integrating into UI components ====
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// var HIT_EXPAND_PX = 20;
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// var HIT_VERT_OFFSET_PX = 10;
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var HIGHLIGHT_DELAY_MS = 130;
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var PRESS_EXPAND_PX = 20;
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var LONG_PRESS_THRESHOLD = 500;
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var LONG_PRESS_DELAY_MS = LONG_PRESS_THRESHOLD - HIGHLIGHT_DELAY_MS;
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var LONG_PRESS_ALLOWED_MOVEMENT = 10;
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// Default amount "active" region protrudes beyond box
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/**
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* By convention, methods prefixed with underscores are meant to be @private,
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* and not @protected. Mixers shouldn't access them - not even to provide them
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* as callback handlers.
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*
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*
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* ========== Geometry =========
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* `Touchable` 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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* +--------------------------+
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* | | - "Start" events in `HitRect` cause `HitRect`
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* | +--------------------+ | to become the responder.
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* | | +--------------+ | | - `HitRect` is typically expanded around
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* | | | | | | the `VisualRect`, but shifted downward.
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* | | | VisualRect | | | - After pressing down, after some delay,
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* | | | | | | and before letting up, the Visual React
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* | | +--------------+ | | will become "active". This makes it eligible
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* | | HitRect | | for being highlighted (so long as the
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* | +--------------------+ | press remains in the `PressRect`).
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* | PressRect o |
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* +----------------------|---+
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* Out Region |
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* +-----+ This gap between the `HitRect` and
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* `PressRect` allows a touch to move far away
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* from the original hit rect, and remain
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* highlighted, and eligible for a "Press".
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* Customize this via
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* `touchableGetPressRectOffset()`.
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*
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*
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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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* v
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* +---------------------------+ DELAY +-------------------------+ T + DELAY +------------------------------+
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* |RESPONDER_INACTIVE_PRESS_IN|+-------->|RESPONDER_ACTIVE_PRESS_IN| +------------> |RESPONDER_ACTIVE_LONG_PRESS_IN|
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* +---------------------------+ +-------------------------+ +------------------------------+
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* + ^ + ^ + ^
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* |LEAVE_ |ENTER_ |LEAVE_ |ENTER_ |LEAVE_ |ENTER_
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* |PRESS_RECT |PRESS_RECT |PRESS_RECT |PRESS_RECT |PRESS_RECT |PRESS_RECT
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* | | | | | |
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* v + v + v +
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* +----------------------------+ DELAY +--------------------------+ +-------------------------------+
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* |RESPONDER_INACTIVE_PRESS_OUT|+------->|RESPONDER_ACTIVE_PRESS_OUT| |RESPONDER_ACTIVE_LONG_PRESS_OUT|
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* +----------------------------+ +--------------------------+ +-------------------------------+
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*
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* T + DELAY => LONG_PRESS_DELAY_MS + 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 `touchableHandlePress` abstract method invocation that occurs
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* when a responder is released while in either of the "Press" states.
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*
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* The other important side effects are the highlight abstract method
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* invocations (internal callbacks) to be implemented by the mixer.
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*
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*
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* @lends Touchable.prototype
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*/
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var TouchableMixin = {
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/**
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* Clear all timeouts on unmount
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*/
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componentWillUnmount: function() {
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this.touchableDelayTimeout && clearTimeout(this.touchableDelayTimeout);
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this.longPressDelayTimeout && clearTimeout(this.longPressDelayTimeout);
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this.pressOutDelayTimeout && clearTimeout(this.pressOutDelayTimeout);
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},
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/**
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* It's prefer that mixins determine state in this way, having the class
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* explicitly mix the state in the one and only `getInitialState` method.
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*
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* @return {object} State object to be placed inside of
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* `this.state.touchable`.
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*/
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touchableGetInitialState: function() {
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return {
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touchable: {touchState: undefined, responderID: null}
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};
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},
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// ==== Hooks to Gesture Responder system ====
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/**
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* Must return true if embedded in a native platform scroll view.
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*/
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touchableHandleResponderTerminationRequest: function() {
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return !this.props.rejectResponderTermination;
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},
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/**
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* Must return true to start the process of `Touchable`.
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*/
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touchableHandleStartShouldSetResponder: function() {
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return !this.props.disabled;
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},
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/**
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* Return true to cancel press on long press.
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*/
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touchableLongPressCancelsPress: function () {
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return true;
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},
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/**
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* Place as callback for a DOM element's `onResponderGrant` event.
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* @param {SyntheticEvent} e Synthetic event from event system.
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*
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*/
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touchableHandleResponderGrant: function(e) {
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var dispatchID = e.currentTarget;
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// Since e is used in a callback invoked on another event loop
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// (as in setTimeout etc), we need to call e.persist() on the
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// event to make sure it doesn't get reused in the event object pool.
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e.persist();
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this.pressOutDelayTimeout && clearTimeout(this.pressOutDelayTimeout);
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this.pressOutDelayTimeout = null;
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this.state.touchable.touchState = States.NOT_RESPONDER;
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this.state.touchable.responderID = dispatchID;
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this._receiveSignal(Signals.RESPONDER_GRANT, e);
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var delayMS =
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this.touchableGetHighlightDelayMS !== undefined ?
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Math.max(this.touchableGetHighlightDelayMS(), 0) : HIGHLIGHT_DELAY_MS;
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delayMS = isNaN(delayMS) ? HIGHLIGHT_DELAY_MS : delayMS;
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if (delayMS !== 0) {
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this.touchableDelayTimeout = setTimeout(
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this._handleDelay.bind(this, e),
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delayMS
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);
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} else {
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this._handleDelay(e);
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}
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var longDelayMS =
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this.touchableGetLongPressDelayMS !== undefined ?
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Math.max(this.touchableGetLongPressDelayMS(), 10) : LONG_PRESS_DELAY_MS;
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longDelayMS = isNaN(longDelayMS) ? LONG_PRESS_DELAY_MS : longDelayMS;
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this.longPressDelayTimeout = setTimeout(
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this._handleLongDelay.bind(this, e),
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longDelayMS + delayMS
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);
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return this.props.shouldBlockResponder && this.props.shouldBlockResponder();
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},
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/**
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* Place as callback for a DOM element's `onResponderRelease` event.
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*/
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touchableHandleResponderRelease: function(e) {
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this._receiveSignal(Signals.RESPONDER_RELEASE, e);
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},
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/**
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* Place as callback for a DOM element's `onResponderTerminate` event.
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*/
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touchableHandleResponderTerminate: function(e) {
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this._receiveSignal(Signals.RESPONDER_TERMINATED, e);
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},
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/**
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* Place as callback for a DOM element's `onResponderMove` event.
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*/
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touchableHandleResponderMove: function(e) {
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// Not enough time elapsed yet, wait for highlight -
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// this is just a perf optimization.
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if (this.state.touchable.touchState === States.RESPONDER_INACTIVE_PRESS_IN) {
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return;
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}
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// Measurement may not have returned yet.
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if (!this.state.touchable.positionOnActivate) {
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return;
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}
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var positionOnActivate = this.state.touchable.positionOnActivate;
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var dimensionsOnActivate = this.state.touchable.dimensionsOnActivate;
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var pressRectOffset = this.touchableGetPressRectOffset ?
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this.touchableGetPressRectOffset() : {
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left: PRESS_EXPAND_PX,
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right: PRESS_EXPAND_PX,
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top: PRESS_EXPAND_PX,
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bottom: PRESS_EXPAND_PX
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};
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var pressExpandLeft = pressRectOffset.left;
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var pressExpandTop = pressRectOffset.top;
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var pressExpandRight = pressRectOffset.right;
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var pressExpandBottom = pressRectOffset.bottom;
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var hitSlop = this.touchableGetHitSlop ?
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this.touchableGetHitSlop() : null;
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if (hitSlop) {
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pressExpandLeft += hitSlop.left;
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pressExpandTop += hitSlop.top;
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pressExpandRight += hitSlop.right;
|
|
pressExpandBottom += hitSlop.bottom;
|
|
}
|
|
|
|
var touch = TouchEventUtils.extractSingleTouch(e.nativeEvent);
|
|
var pageX = touch && touch.pageX;
|
|
var pageY = touch && touch.pageY;
|
|
|
|
if (this.pressInLocation) {
|
|
var movedDistance = this._getDistanceBetweenPoints(pageX, pageY, this.pressInLocation.pageX, this.pressInLocation.pageY);
|
|
if (movedDistance > LONG_PRESS_ALLOWED_MOVEMENT) {
|
|
this._cancelLongPressDelayTimeout();
|
|
}
|
|
}
|
|
|
|
var isTouchWithinActive =
|
|
pageX > positionOnActivate.left - pressExpandLeft &&
|
|
pageY > positionOnActivate.top - pressExpandTop &&
|
|
pageX <
|
|
positionOnActivate.left +
|
|
dimensionsOnActivate.width +
|
|
pressExpandRight &&
|
|
pageY <
|
|
positionOnActivate.top +
|
|
dimensionsOnActivate.height +
|
|
pressExpandBottom;
|
|
if (isTouchWithinActive) {
|
|
this._receiveSignal(Signals.ENTER_PRESS_RECT, e);
|
|
var curState = this.state.touchable.touchState;
|
|
if (curState === States.RESPONDER_INACTIVE_PRESS_IN) {
|
|
// fix for t7967420
|
|
this._cancelLongPressDelayTimeout();
|
|
}
|
|
} else {
|
|
this._cancelLongPressDelayTimeout();
|
|
this._receiveSignal(Signals.LEAVE_PRESS_RECT, e);
|
|
}
|
|
},
|
|
|
|
// ==== Abstract Application Callbacks ====
|
|
|
|
/**
|
|
* Invoked when the item should be highlighted. Mixers should implement this
|
|
* to visually distinguish the `VisualRect` so that the user knows that
|
|
* releasing a touch will result in a "selection" (analog to click).
|
|
*
|
|
* @abstract
|
|
* touchableHandleActivePressIn: function,
|
|
*/
|
|
|
|
/**
|
|
* Invoked when the item is "active" (in that it is still eligible to become
|
|
* a "select") but the touch has left the `PressRect`. Usually the mixer will
|
|
* want to unhighlight the `VisualRect`. If the user (while pressing) moves
|
|
* back into the `PressRect` `touchableHandleActivePressIn` will be invoked
|
|
* again and the mixer should probably highlight the `VisualRect` again. This
|
|
* event will not fire on an `touchEnd/mouseUp` event, only move events while
|
|
* the user is depressing the mouse/touch.
|
|
*
|
|
* @abstract
|
|
* touchableHandleActivePressOut: function
|
|
*/
|
|
|
|
/**
|
|
* Invoked when the item is "selected" - meaning the interaction ended by
|
|
* letting up while the item was either in the state
|
|
* `RESPONDER_ACTIVE_PRESS_IN` or `RESPONDER_INACTIVE_PRESS_IN`.
|
|
*
|
|
* @abstract
|
|
* touchableHandlePress: function
|
|
*/
|
|
|
|
/**
|
|
* Invoked when the item is long pressed - meaning the interaction ended by
|
|
* letting up while the item was in `RESPONDER_ACTIVE_LONG_PRESS_IN`. If
|
|
* `touchableHandleLongPress` is *not* provided, `touchableHandlePress` will
|
|
* be called as it normally is. If `touchableHandleLongPress` is provided, by
|
|
* default any `touchableHandlePress` callback will not be invoked. To
|
|
* override this default behavior, override `touchableLongPressCancelsPress`
|
|
* to return false. As a result, `touchableHandlePress` will be called when
|
|
* lifting up, even if `touchableHandleLongPress` has also been called.
|
|
*
|
|
* @abstract
|
|
* touchableHandleLongPress: function
|
|
*/
|
|
|
|
/**
|
|
* Returns the number of millis to wait before triggering a highlight.
|
|
*
|
|
* @abstract
|
|
* touchableGetHighlightDelayMS: function
|
|
*/
|
|
|
|
/**
|
|
* Returns the amount to extend the `HitRect` into the `PressRect`. Positive
|
|
* numbers mean the size expands outwards.
|
|
*
|
|
* @abstract
|
|
* touchableGetPressRectOffset: function
|
|
*/
|
|
|
|
|
|
|
|
// ==== Internal Logic ====
|
|
|
|
/**
|
|
* Measures the `HitRect` node on activation. The Bounding rectangle is with
|
|
* respect to viewport - not page, so adding the `pageXOffset/pageYOffset`
|
|
* should result in points that are in the same coordinate system as an
|
|
* event's `globalX/globalY` data values.
|
|
*
|
|
* - Consider caching this for the lifetime of the component, or possibly
|
|
* being able to share this cache between any `ScrollMap` view.
|
|
*
|
|
* @sideeffects
|
|
* @private
|
|
*/
|
|
_remeasureMetricsOnActivation: function() {
|
|
queryLayoutByID(
|
|
this.state.touchable.responderID,
|
|
null,
|
|
this._handleQueryLayout
|
|
);
|
|
},
|
|
|
|
_handleQueryLayout: function(l, t, w, h, globalX, globalY) {
|
|
this.state.touchable.positionOnActivate &&
|
|
Position.release(this.state.touchable.positionOnActivate);
|
|
this.state.touchable.dimensionsOnActivate &&
|
|
BoundingDimensions.release(this.state.touchable.dimensionsOnActivate);
|
|
this.state.touchable.positionOnActivate = Position.getPooled(globalX, globalY);
|
|
this.state.touchable.dimensionsOnActivate = BoundingDimensions.getPooled(w, h);
|
|
},
|
|
|
|
_handleDelay: function(e) {
|
|
this.touchableDelayTimeout = null;
|
|
this._receiveSignal(Signals.DELAY, e);
|
|
},
|
|
|
|
_handleLongDelay: function(e) {
|
|
this.longPressDelayTimeout = null;
|
|
var curState = this.state.touchable.touchState;
|
|
if (curState !== States.RESPONDER_ACTIVE_PRESS_IN &&
|
|
curState !== States.RESPONDER_ACTIVE_LONG_PRESS_IN) {
|
|
console.error('Attempted to transition from state `' + curState + '` to `' +
|
|
States.RESPONDER_ACTIVE_LONG_PRESS_IN + '`, which is not supported. This is ' +
|
|
'most likely due to `Touchable.longPressDelayTimeout` not being cancelled.');
|
|
} else {
|
|
this._receiveSignal(Signals.LONG_PRESS_DETECTED, e);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Receives a state machine signal, performs side effects of the transition
|
|
* and stores the new state. Validates the transition as well.
|
|
*
|
|
* @param {Signals} signal State machine signal.
|
|
* @throws Error if invalid state transition or unrecognized signal.
|
|
* @sideeffects
|
|
*/
|
|
_receiveSignal: function(signal, e) {
|
|
var responderID = this.state.touchable.responderID;
|
|
var curState = this.state.touchable.touchState;
|
|
var nextState = Transitions[curState] && Transitions[curState][signal];
|
|
if (!responderID && signal === Signals.RESPONDER_RELEASE) {
|
|
return;
|
|
}
|
|
if (!nextState) {
|
|
throw new Error(
|
|
'Unrecognized signal `' + signal + '` or state `' + curState +
|
|
'` for Touchable responder `' + responderID + '`'
|
|
);
|
|
}
|
|
if (nextState === States.ERROR) {
|
|
throw new Error(
|
|
'Touchable cannot transition from `' + curState + '` to `' + signal +
|
|
'` for responder `' + responderID + '`'
|
|
);
|
|
}
|
|
if (curState !== nextState) {
|
|
this._performSideEffectsForTransition(curState, nextState, signal, e);
|
|
this.state.touchable.touchState = nextState;
|
|
}
|
|
},
|
|
|
|
_cancelLongPressDelayTimeout: function () {
|
|
this.longPressDelayTimeout && clearTimeout(this.longPressDelayTimeout);
|
|
this.longPressDelayTimeout = null;
|
|
},
|
|
|
|
_isHighlight: function (state) {
|
|
return state === States.RESPONDER_ACTIVE_PRESS_IN ||
|
|
state === States.RESPONDER_ACTIVE_LONG_PRESS_IN;
|
|
},
|
|
|
|
_savePressInLocation: function(e) {
|
|
var touch = TouchEventUtils.extractSingleTouch(e.nativeEvent);
|
|
var pageX = touch && touch.pageX;
|
|
var pageY = touch && touch.pageY;
|
|
var locationX = touch && touch.locationX;
|
|
var locationY = touch && touch.locationY;
|
|
this.pressInLocation = {pageX, pageY, locationX, locationY};
|
|
},
|
|
|
|
_getDistanceBetweenPoints: function (aX, aY, bX, bY) {
|
|
var deltaX = aX - bX;
|
|
var deltaY = aY - bY;
|
|
return Math.sqrt(deltaX * deltaX + deltaY * deltaY);
|
|
},
|
|
|
|
/**
|
|
* Will perform a transition between touchable states, and identify any
|
|
* highlighting or unhighlighting that must be performed for this particular
|
|
* transition.
|
|
*
|
|
* @param {States} curState Current Touchable state.
|
|
* @param {States} nextState Next Touchable state.
|
|
* @param {Signal} signal Signal that triggered the transition.
|
|
* @param {Event} e Native event.
|
|
* @sideeffects
|
|
*/
|
|
_performSideEffectsForTransition: function(curState, nextState, signal, e) {
|
|
var curIsHighlight = this._isHighlight(curState);
|
|
var newIsHighlight = this._isHighlight(nextState);
|
|
|
|
var isFinalSignal =
|
|
signal === Signals.RESPONDER_TERMINATED ||
|
|
signal === Signals.RESPONDER_RELEASE;
|
|
|
|
if (isFinalSignal) {
|
|
this._cancelLongPressDelayTimeout();
|
|
}
|
|
|
|
if (!IsActive[curState] && IsActive[nextState]) {
|
|
this._remeasureMetricsOnActivation();
|
|
}
|
|
|
|
if (IsPressingIn[curState] && signal === Signals.LONG_PRESS_DETECTED) {
|
|
this.touchableHandleLongPress && this.touchableHandleLongPress(e);
|
|
}
|
|
|
|
if (newIsHighlight && !curIsHighlight) {
|
|
this._savePressInLocation(e);
|
|
this.touchableHandleActivePressIn && this.touchableHandleActivePressIn(e);
|
|
} else if (!newIsHighlight && curIsHighlight && this.touchableHandleActivePressOut) {
|
|
if (this.touchableGetPressOutDelayMS && this.touchableGetPressOutDelayMS()) {
|
|
this.pressOutDelayTimeout = setTimeout(() => {
|
|
this.touchableHandleActivePressOut(e);
|
|
}, this.touchableGetPressOutDelayMS());
|
|
} else {
|
|
this.touchableHandleActivePressOut(e);
|
|
}
|
|
}
|
|
|
|
if (IsPressingIn[curState] && signal === Signals.RESPONDER_RELEASE) {
|
|
var hasLongPressHandler = !!this.props.onLongPress;
|
|
var pressIsLongButStillCallOnPress =
|
|
IsLongPressingIn[curState] && ( // We *are* long pressing..
|
|
!hasLongPressHandler || // But either has no long handler
|
|
!this.touchableLongPressCancelsPress() // or we're told to ignore it.
|
|
);
|
|
|
|
var shouldInvokePress = !IsLongPressingIn[curState] || pressIsLongButStillCallOnPress;
|
|
if (shouldInvokePress && this.touchableHandlePress) {
|
|
this.touchableHandlePress(e);
|
|
}
|
|
}
|
|
|
|
this.touchableDelayTimeout && clearTimeout(this.touchableDelayTimeout);
|
|
this.touchableDelayTimeout = null;
|
|
}
|
|
|
|
};
|
|
|
|
var Touchable = {
|
|
Mixin: TouchableMixin,
|
|
TOUCH_TARGET_DEBUG: false, // Highlights all touchable targets. Toggle with Inspector.
|
|
/**
|
|
* Renders a debugging overlay to visualize touch target with hitSlop (might not work on Android).
|
|
*/
|
|
renderDebugView: ({color, hitSlop}) => {
|
|
if (!Touchable.TOUCH_TARGET_DEBUG) {
|
|
return null;
|
|
}
|
|
if (!__DEV__) {
|
|
throw Error('Touchable.TOUCH_TARGET_DEBUG should not be enabled in prod!');
|
|
}
|
|
const debugHitSlopStyle = {};
|
|
hitSlop = hitSlop || {top: 0, bottom: 0, left: 0, right: 0};
|
|
for (const key in hitSlop) {
|
|
debugHitSlopStyle[key] = -hitSlop[key];
|
|
}
|
|
const hexColor = '#' + ('00000000' + normalizeColor(color).toString(16)).substr(-8);
|
|
return (
|
|
<View
|
|
pointerEvents="none"
|
|
style={{
|
|
position: 'absolute',
|
|
borderColor: hexColor.slice(0, -2) + '55', // More opaque
|
|
borderWidth: 1,
|
|
borderStyle: 'dashed',
|
|
backgroundColor: hexColor.slice(0, -2) + '0F', // Less opaque
|
|
...debugHitSlopStyle
|
|
}}
|
|
/>
|
|
);
|
|
}
|
|
};
|
|
|
|
module.exports = Touchable;
|