Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | 17x 17x 17x 431x 256x 256x 256x 256x 256x 256x 256x 256x 256x 256x 256x 256x 256x 182x 175x 256x 91x 91x 165x 165x 165x 256x 263x 1x 256x | /**
* Copyright (c) Nicolas Gallagher
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
import type { TouchEvent } from './ResponderEventTypes';
import getBoundingClientRect from '../../modules/getBoundingClientRect';
import ResponderTouchHistoryStore from './ResponderTouchHistoryStore';
export type ResponderEvent = {|
bubbles: boolean,
cancelable: boolean,
currentTarget: any,
defaultPrevented: ?boolean,
dispatchConfig: {
registrationName?: string,
phasedRegistrationNames?: {
bubbled: string,
captured: string
}
},
eventPhase: ?number,
isDefaultPrevented: () => boolean,
isPropagationStopped: () => boolean,
isTrusted: ?boolean,
preventDefault: () => void,
stopPropagation: () => void,
nativeEvent: TouchEvent,
persist: () => void,
target: ?any,
timeStamp: number,
touchHistory: $ReadOnly<{|
indexOfSingleActiveTouch: number,
mostRecentTimeStamp: number,
numberActiveTouches: number,
touchBank: Array<{|
currentPageX: number,
currentPageY: number,
currentTimeStamp: number,
previousPageX: number,
previousPageY: number,
previousTimeStamp: number,
startPageX: number,
startPageY: number,
startTimeStamp: number,
touchActive: boolean
|}>
|}>
|};
const emptyFunction = () => {};
const emptyObject = {};
const emptyArray = [];
/**
* Safari produces very large identifiers that would cause the `touchBank` array
* length to be so large as to crash the browser, if not normalized like this.
* In the future the `touchBank` should use an object/map instead.
*/
function normalizeIdentifier(identifier) {
return identifier > 20 ? identifier % 20 : identifier;
}
/**
* Converts a native DOM event to a ResponderEvent.
* Mouse events are transformed into fake touch events.
*/
export default function createResponderEvent(domEvent: any): ResponderEvent {
let rect;
let propagationWasStopped = false;
let changedTouches;
let touches;
const domEventChangedTouches = domEvent.changedTouches;
const domEventType = domEvent.type;
const metaKey = domEvent.metaKey === true;
const shiftKey = domEvent.shiftKey === true;
const force = (domEventChangedTouches && domEventChangedTouches[0].force) || 0;
const identifier = normalizeIdentifier(
(domEventChangedTouches && domEventChangedTouches[0].identifier) || 0
);
const clientX = (domEventChangedTouches && domEventChangedTouches[0].clientX) || domEvent.clientX;
const clientY = (domEventChangedTouches && domEventChangedTouches[0].clientY) || domEvent.clientY;
const pageX = (domEventChangedTouches && domEventChangedTouches[0].pageX) || domEvent.pageX;
const pageY = (domEventChangedTouches && domEventChangedTouches[0].pageY) || domEvent.pageY;
const preventDefault =
typeof domEvent.preventDefault === 'function'
? domEvent.preventDefault.bind(domEvent)
: emptyFunction;
const timestamp = domEvent.timeStamp;
function normalizeTouches(touches) {
return Array.prototype.slice.call(touches).map((touch) => {
return {
force: touch.force,
identifier: normalizeIdentifier(touch.identifier),
get locationX() {
return locationX(touch.clientX);
},
get locationY() {
return locationY(touch.clientY);
},
pageX: touch.pageX,
pageY: touch.pageY,
target: touch.target,
timestamp
};
});
}
if (domEventChangedTouches != null) {
changedTouches = normalizeTouches(domEventChangedTouches);
touches = normalizeTouches(domEvent.touches);
} else {
const emulatedTouches = [
{
force,
identifier,
get locationX() {
return locationX(clientX);
},
get locationY() {
return locationY(clientY);
},
pageX,
pageY,
target: domEvent.target,
timestamp
}
];
changedTouches = emulatedTouches;
touches =
domEventType === 'mouseup' || domEventType === 'dragstart' ? emptyArray : emulatedTouches;
}
const responderEvent = {
bubbles: true,
cancelable: true,
// `currentTarget` is set before dispatch
currentTarget: null,
defaultPrevented: domEvent.defaultPrevented,
dispatchConfig: emptyObject,
eventPhase: domEvent.eventPhase,
isDefaultPrevented() {
return domEvent.defaultPrevented;
},
isPropagationStopped() {
return propagationWasStopped;
},
isTrusted: domEvent.isTrusted,
nativeEvent: {
altKey: false,
ctrlKey: false,
metaKey,
shiftKey,
changedTouches,
force,
identifier,
get locationX() {
return locationX(clientX);
},
get locationY() {
return locationY(clientY);
},
pageX,
pageY,
target: domEvent.target,
timestamp,
touches,
type: domEventType
},
persist: emptyFunction,
preventDefault,
stopPropagation() {
propagationWasStopped = true;
},
target: domEvent.target,
timeStamp: timestamp,
touchHistory: ResponderTouchHistoryStore.touchHistory
};
// Using getters and functions serves two purposes:
// 1) The value of `currentTarget` is not initially available.
// 2) Measuring the clientRect may cause layout jank and should only be done on-demand.
function locationX(x) {
rect = rect || getBoundingClientRect(responderEvent.currentTarget);
if (rect) {
return x - rect.left;
}
}
function locationY(y) {
rect = rect || getBoundingClientRect(responderEvent.currentTarget);
if (rect) {
return y - rect.top;
}
}
return responderEvent;
}
|