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Diffstat (limited to 'node_modules/react-dom/lib/ReactFiber.js')
| -rw-r--r-- | node_modules/react-dom/lib/ReactFiber.js | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/node_modules/react-dom/lib/ReactFiber.js b/node_modules/react-dom/lib/ReactFiber.js deleted file mode 100644 index 2774a2dc4..000000000 --- a/node_modules/react-dom/lib/ReactFiber.js +++ /dev/null @@ -1,188 +0,0 @@ -/** - * Copyright 2013-present, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under the BSD-style license found in the - * LICENSE file in the root directory of this source tree. An additional grant - * of patent rights can be found in the PATENTS file in the same directory. - * - * - */ - -'use strict'; - -var ReactTypeOfWork = require('./ReactTypeOfWork'); -var IndeterminateComponent = ReactTypeOfWork.IndeterminateComponent, - ClassComponent = ReactTypeOfWork.ClassComponent, - HostContainer = ReactTypeOfWork.HostContainer, - HostComponent = ReactTypeOfWork.HostComponent, - CoroutineComponent = ReactTypeOfWork.CoroutineComponent, - YieldComponent = ReactTypeOfWork.YieldComponent; - -var _require = require('./ReactPriorityLevel'), - NoWork = _require.NoWork; - -// An Instance is shared between all versions of a component. We can easily -// break this out into a separate object to avoid copying so much to the -// alternate versions of the tree. We put this on a single object for now to -// minimize the number of objects created during the initial render. - - -// A Fiber is work on a Component that needs to be done or was done. There can -// be more than one per component. - - -// This is a constructor of a POJO instead of a constructor function for a few -// reasons: -// 1) Nobody should add any instance methods on this. Instance methods can be -// more difficult to predict when they get optimized and they are almost -// never inlined properly in static compilers. -// 2) Nobody should rely on `instanceof Fiber` for type testing. We should -// always know when it is a fiber. -// 3) We can easily go from a createFiber call to calling a constructor if that -// is faster. The opposite is not true. -// 4) We might want to experiment with using numeric keys since they are easier -// to optimize in a non-JIT environment. -// 5) It should be easy to port this to a C struct and keep a C implementation -// compatible. -var createFiber = function (tag, key) { - return { - // Instance - - tag: tag, - - key: key, - - type: null, - - stateNode: null, - - // Fiber - - 'return': null, - - child: null, - sibling: null, - - ref: null, - - pendingProps: null, - memoizedProps: null, - updateQueue: null, - memoizedState: null, - callbackList: null, - output: null, - - nextEffect: null, - firstEffect: null, - lastEffect: null, - - pendingWorkPriority: NoWork, - progressedPriority: NoWork, - progressedChild: null, - - alternate: null - }; -}; - -function shouldConstruct(Component) { - return !!(Component.prototype && Component.prototype.isReactComponent); -} - -// This is used to create an alternate fiber to do work on. -// TODO: Rename to createWorkInProgressFiber or something like that. -exports.cloneFiber = function (fiber, priorityLevel) { - // We clone to get a work in progress. That means that this fiber is the - // current. To make it safe to reuse that fiber later on as work in progress - // we need to reset its work in progress flag now. We don't have an - // opportunity to do this earlier since we don't traverse the tree when - // the work in progress tree becomes the current tree. - // fiber.progressedPriority = NoWork; - // fiber.progressedChild = null; - - // We use a double buffering pooling technique because we know that we'll only - // ever need at most two versions of a tree. We pool the "other" unused node - // that we're free to reuse. This is lazily created to avoid allocating extra - // objects for things that are never updated. It also allow us to reclaim the - // extra memory if needed. - var alt = fiber.alternate; - if (alt) { - // Whenever we clone, we do so to get a new work in progress. - // This ensures that we've reset these in the new tree. - alt.nextEffect = null; - alt.firstEffect = null; - alt.lastEffect = null; - } else { - // This should not have an alternate already - alt = createFiber(fiber.tag, fiber.key); - alt.type = fiber.type; - - alt.progressedChild = fiber.progressedChild; - alt.progressedPriority = fiber.progressedPriority; - - alt.alternate = fiber; - fiber.alternate = alt; - } - - alt.stateNode = fiber.stateNode; - alt.child = fiber.child; - alt.sibling = fiber.sibling; // This should always be overridden. TODO: null - alt.ref = fiber.ref; - // pendingProps is here for symmetry but is unnecessary in practice for now. - // TODO: Pass in the new pendingProps as an argument maybe? - alt.pendingProps = fiber.pendingProps; - alt.updateQueue = fiber.updateQueue; - alt.callbackList = fiber.callbackList; - alt.pendingWorkPriority = priorityLevel; - - alt.memoizedProps = fiber.memoizedProps; - alt.output = fiber.output; - - return alt; -}; - -exports.createHostContainerFiber = function () { - var fiber = createFiber(HostContainer, null); - return fiber; -}; - -exports.createFiberFromElement = function (element, priorityLevel) { - // $FlowFixMe: ReactElement.key is currently defined as ?string but should be defined as null | string in Flow. - var fiber = createFiberFromElementType(element.type, element.key); - fiber.pendingProps = element.props; - fiber.pendingWorkPriority = priorityLevel; - return fiber; -}; - -function createFiberFromElementType(type, key) { - var fiber = void 0; - if (typeof type === 'function') { - fiber = shouldConstruct(type) ? createFiber(ClassComponent, key) : createFiber(IndeterminateComponent, key); - fiber.type = type; - } else if (typeof type === 'string') { - fiber = createFiber(HostComponent, key); - fiber.type = type; - } else if (typeof type === 'object' && type !== null) { - // Currently assumed to be a continuation and therefore is a fiber already. - fiber = type; - } else { - throw new Error('Unknown component type: ' + typeof type); - } - return fiber; -} - -exports.createFiberFromElementType = createFiberFromElementType; - -exports.createFiberFromCoroutine = function (coroutine, priorityLevel) { - var fiber = createFiber(CoroutineComponent, coroutine.key); - fiber.type = coroutine.handler; - fiber.pendingProps = coroutine; - fiber.pendingWorkPriority = priorityLevel; - return fiber; -}; - -exports.createFiberFromYield = function (yieldNode, priorityLevel) { - var fiber = createFiber(YieldComponent, yieldNode.key); - fiber.pendingProps = {}; - return fiber; -};
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