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/**
* 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 _assign = require('object-assign');
var CallbackQueue = require('./CallbackQueue');
var PooledClass = require('./PooledClass');
var ReactBrowserEventEmitter = require('./ReactBrowserEventEmitter');
var ReactInputSelection = require('./ReactInputSelection');
var ReactInstrumentation = require('./ReactInstrumentation');
var Transaction = require('./Transaction');
var ReactUpdateQueue = require('./ReactUpdateQueue');
/**
* Ensures that, when possible, the selection range (currently selected text
* input) is not disturbed by performing the transaction.
*/
var SELECTION_RESTORATION = {
/**
* @return {Selection} Selection information.
*/
initialize: ReactInputSelection.getSelectionInformation,
/**
* @param {Selection} sel Selection information returned from `initialize`.
*/
close: ReactInputSelection.restoreSelection
};
/**
* Suppresses events (blur/focus) that could be inadvertently dispatched due to
* high level DOM manipulations (like temporarily removing a text input from the
* DOM).
*/
var EVENT_SUPPRESSION = {
/**
* @return {boolean} The enabled status of `ReactBrowserEventEmitter` before
* the reconciliation.
*/
initialize: function () {
var currentlyEnabled = ReactBrowserEventEmitter.isEnabled();
ReactBrowserEventEmitter.setEnabled(false);
return currentlyEnabled;
},
/**
* @param {boolean} previouslyEnabled Enabled status of
* `ReactBrowserEventEmitter` before the reconciliation occurred. `close`
* restores the previous value.
*/
close: function (previouslyEnabled) {
ReactBrowserEventEmitter.setEnabled(previouslyEnabled);
}
};
/**
* Provides a queue for collecting `componentDidMount` and
* `componentDidUpdate` callbacks during the transaction.
*/
var ON_DOM_READY_QUEUEING = {
/**
* Initializes the internal `onDOMReady` queue.
*/
initialize: function () {
this.reactMountReady.reset();
},
/**
* After DOM is flushed, invoke all registered `onDOMReady` callbacks.
*/
close: function () {
this.reactMountReady.notifyAll();
}
};
/**
* Executed within the scope of the `Transaction` instance. Consider these as
* being member methods, but with an implied ordering while being isolated from
* each other.
*/
var TRANSACTION_WRAPPERS = [SELECTION_RESTORATION, EVENT_SUPPRESSION, ON_DOM_READY_QUEUEING];
if (process.env.NODE_ENV !== 'production') {
TRANSACTION_WRAPPERS.push({
initialize: ReactInstrumentation.debugTool.onBeginFlush,
close: ReactInstrumentation.debugTool.onEndFlush
});
}
/**
* Currently:
* - The order that these are listed in the transaction is critical:
* - Suppresses events.
* - Restores selection range.
*
* Future:
* - Restore document/overflow scroll positions that were unintentionally
* modified via DOM insertions above the top viewport boundary.
* - Implement/integrate with customized constraint based layout system and keep
* track of which dimensions must be remeasured.
*
* @class ReactReconcileTransaction
*/
function ReactReconcileTransaction(useCreateElement) {
this.reinitializeTransaction();
// Only server-side rendering really needs this option (see
// `ReactServerRendering`), but server-side uses
// `ReactServerRenderingTransaction` instead. This option is here so that it's
// accessible and defaults to false when `ReactDOMComponent` and
// `ReactDOMTextComponent` checks it in `mountComponent`.`
this.renderToStaticMarkup = false;
this.reactMountReady = CallbackQueue.getPooled(null);
this.useCreateElement = useCreateElement;
}
var Mixin = {
/**
* @see Transaction
* @abstract
* @final
* @return {array<object>} List of operation wrap procedures.
* TODO: convert to array<TransactionWrapper>
*/
getTransactionWrappers: function () {
return TRANSACTION_WRAPPERS;
},
/**
* @return {object} The queue to collect `onDOMReady` callbacks with.
*/
getReactMountReady: function () {
return this.reactMountReady;
},
/**
* @return {object} The queue to collect React async events.
*/
getUpdateQueue: function () {
return ReactUpdateQueue;
},
/**
* Save current transaction state -- if the return value from this method is
* passed to `rollback`, the transaction will be reset to that state.
*/
checkpoint: function () {
// reactMountReady is the our only stateful wrapper
return this.reactMountReady.checkpoint();
},
rollback: function (checkpoint) {
this.reactMountReady.rollback(checkpoint);
},
/**
* `PooledClass` looks for this, and will invoke this before allowing this
* instance to be reused.
*/
destructor: function () {
CallbackQueue.release(this.reactMountReady);
this.reactMountReady = null;
}
};
_assign(ReactReconcileTransaction.prototype, Transaction, Mixin);
PooledClass.addPoolingTo(ReactReconcileTransaction);
module.exports = ReactReconcileTransaction;
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