mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
2016460528
Summary: Changelog: [internal] This is a mechanism that will guess event's React priority based on other events ongoing on the platform. If an event happens within span of ContinuousStart -> ContinuousEnd and its category is unspecified, we deduce it's React priority to be default. All other events are discrete. Special case: `onScroll`, which is always treated as "Default". Reviewed By: JoshuaGross Differential Revision: D28485060 fbshipit-source-id: d2eae63dbcf03271dfed97128a1590dd165a3ce2
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
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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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#include "TouchEventEmitter.h"
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namespace facebook {
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namespace react {
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#pragma mark - Touches
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static void setTouchPayloadOnObject(
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jsi::Object &object,
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jsi::Runtime &runtime,
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Touch const &touch) {
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object.setProperty(runtime, "locationX", touch.offsetPoint.x);
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object.setProperty(runtime, "locationY", touch.offsetPoint.y);
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object.setProperty(runtime, "pageX", touch.pagePoint.x);
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object.setProperty(runtime, "pageY", touch.pagePoint.y);
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object.setProperty(runtime, "screenX", touch.screenPoint.x);
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object.setProperty(runtime, "screenY", touch.screenPoint.y);
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object.setProperty(runtime, "identifier", touch.identifier);
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object.setProperty(runtime, "target", touch.target);
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object.setProperty(runtime, "timestamp", touch.timestamp * 1000);
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object.setProperty(runtime, "force", touch.force);
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}
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static jsi::Value touchesPayload(
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jsi::Runtime &runtime,
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Touches const &touches) {
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auto array = jsi::Array(runtime, touches.size());
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int i = 0;
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for (auto const &touch : touches) {
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auto object = jsi::Object(runtime);
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setTouchPayloadOnObject(object, runtime, touch);
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array.setValueAtIndex(runtime, i++, object);
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}
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return array;
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}
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static jsi::Value touchEventPayload(
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jsi::Runtime &runtime,
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TouchEvent const &event) {
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auto object = jsi::Object(runtime);
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object.setProperty(
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runtime, "touches", touchesPayload(runtime, event.touches));
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object.setProperty(
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runtime, "changedTouches", touchesPayload(runtime, event.changedTouches));
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object.setProperty(
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runtime, "targetTouches", touchesPayload(runtime, event.targetTouches));
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if (!event.changedTouches.empty()) {
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auto const &firstChangedTouch = *event.changedTouches.begin();
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setTouchPayloadOnObject(object, runtime, firstChangedTouch);
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}
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return object;
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}
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void TouchEventEmitter::dispatchTouchEvent(
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std::string const &type,
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TouchEvent const &event,
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EventPriority priority,
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RawEvent::Category category) const {
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dispatchEvent(
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type,
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[event](jsi::Runtime &runtime) {
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return touchEventPayload(runtime, event);
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},
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priority,
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category);
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}
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void TouchEventEmitter::onTouchStart(TouchEvent const &event) const {
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dispatchTouchEvent(
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"touchStart",
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event,
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EventPriority::AsynchronousBatched,
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RawEvent::Category::ContinuousStart);
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}
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void TouchEventEmitter::onTouchMove(TouchEvent const &event) const {
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dispatchUniqueEvent("touchMove", [event](jsi::Runtime &runtime) {
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return touchEventPayload(runtime, event);
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});
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}
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void TouchEventEmitter::onTouchEnd(TouchEvent const &event) const {
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dispatchTouchEvent(
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"touchEnd",
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event,
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EventPriority::AsynchronousBatched,
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RawEvent::Category::ContinuousEnd);
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}
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void TouchEventEmitter::onTouchCancel(TouchEvent const &event) const {
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dispatchTouchEvent(
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"touchCancel",
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event,
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EventPriority::AsynchronousBatched,
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RawEvent::Category::ContinuousEnd);
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}
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} // namespace react
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} // namespace facebook
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