react-native/ReactCommon/fabric/uimanager/SchedulerEventDispatcher.cpp
Sebastian Markbage 5d9326be29 Remove instanceHandle, pass event target instead + add dispatchToEmptyTarget
Summary:
Removes the concept of instance handle. Instead we pass the event target
to createNode and don't pass it to subsequent clones.

The life time of the event target is managed by native (the event emitter).
It has to be released manually.

Reviewed By: shergin

Differential Revision: D8688330

fbshipit-source-id: e11b61f147ea9ca4dfb453fe07063ed06f24b7ac
2018-06-29 15:32:27 -07:00

52 lines
1.4 KiB
C++

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "SchedulerEventDispatcher.h"
namespace facebook {
namespace react {
// TODO(T29874519): Get rid of "top" prefix once and for all.
/*
* Capitalizes the first letter of the event type and adds "top" prefix
* (e.g. "layout" becames "topLayout").
*/
static std::string normalizeEventType(const std::string &type) {
std::string prefixedType = type;
prefixedType[0] = toupper(prefixedType[0]);
prefixedType.insert(0, "top");
return prefixedType;
}
void SchedulerEventDispatcher::setUIManager(std::shared_ptr<const FabricUIManager> uiManager) const {
uiManager_ = uiManager;
}
void SchedulerEventDispatcher::dispatchEvent(
const EventTarget &eventTarget,
const std::string &type,
const folly::dynamic &payload,
const EventPriority &priority
) const {
if (!uiManager_) {
return;
}
// TODO: Schedule the event based on priority.
uiManager_->dispatchEventToTarget(eventTarget, normalizeEventType(type), payload);
}
void SchedulerEventDispatcher::releaseEventTarget(const EventTarget &eventTarget) const {
if (!uiManager_) {
return;
}
// TODO(shergin): This needs to move to the destructor of EventEmitter. For now we'll leak.
// uiManager_->releaseEventTarget(eventTarget);
}
} // namespace react
} // namespace facebook