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
|
/**
* 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 _prodInvariant = require('./reactProdInvariant'),
_assign = require('object-assign');
var DOMChildrenOperations = require('./DOMChildrenOperations');
var DOMLazyTree = require('./DOMLazyTree');
var ReactDOMComponentTree = require('./ReactDOMComponentTree');
var escapeTextContentForBrowser = require('./escapeTextContentForBrowser');
var invariant = require('fbjs/lib/invariant');
var validateDOMNesting = require('./validateDOMNesting');
/**
* Text nodes violate a couple assumptions that React makes about components:
*
* - When mounting text into the DOM, adjacent text nodes are merged.
* - Text nodes cannot be assigned a React root ID.
*
* This component is used to wrap strings between comment nodes so that they
* can undergo the same reconciliation that is applied to elements.
*
* TODO: Investigate representing React components in the DOM with text nodes.
*
* @class ReactDOMTextComponent
* @extends ReactComponent
* @internal
*/
var ReactDOMTextComponent = function (text) {
// TODO: This is really a ReactText (ReactNode), not a ReactElement
this._currentElement = text;
this._stringText = '' + text;
// ReactDOMComponentTree uses these:
this._hostNode = null;
this._hostParent = null;
// Properties
this._domID = 0;
this._mountIndex = 0;
this._closingComment = null;
this._commentNodes = null;
};
_assign(ReactDOMTextComponent.prototype, {
/**
* Creates the markup for this text node. This node is not intended to have
* any features besides containing text content.
*
* @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
* @return {string} Markup for this text node.
* @internal
*/
mountComponent: function (transaction, hostParent, hostContainerInfo, context) {
if (process.env.NODE_ENV !== 'production') {
var parentInfo;
if (hostParent != null) {
parentInfo = hostParent._ancestorInfo;
} else if (hostContainerInfo != null) {
parentInfo = hostContainerInfo._ancestorInfo;
}
if (parentInfo) {
// parentInfo should always be present except for the top-level
// component when server rendering
validateDOMNesting(null, this._stringText, this, parentInfo);
}
}
var domID = hostContainerInfo._idCounter++;
var openingValue = ' react-text: ' + domID + ' ';
var closingValue = ' /react-text ';
this._domID = domID;
this._hostParent = hostParent;
if (transaction.useCreateElement) {
var ownerDocument = hostContainerInfo._ownerDocument;
var openingComment = ownerDocument.createComment(openingValue);
var closingComment = ownerDocument.createComment(closingValue);
var lazyTree = DOMLazyTree(ownerDocument.createDocumentFragment());
DOMLazyTree.queueChild(lazyTree, DOMLazyTree(openingComment));
if (this._stringText) {
DOMLazyTree.queueChild(lazyTree, DOMLazyTree(ownerDocument.createTextNode(this._stringText)));
}
DOMLazyTree.queueChild(lazyTree, DOMLazyTree(closingComment));
ReactDOMComponentTree.precacheNode(this, openingComment);
this._closingComment = closingComment;
return lazyTree;
} else {
var escapedText = escapeTextContentForBrowser(this._stringText);
if (transaction.renderToStaticMarkup) {
// Normally we'd wrap this between comment nodes for the reasons stated
// above, but since this is a situation where React won't take over
// (static pages), we can simply return the text as it is.
return escapedText;
}
return '<!--' + openingValue + '-->' + escapedText + '<!--' + closingValue + '-->';
}
},
/**
* Updates this component by updating the text content.
*
* @param {ReactText} nextText The next text content
* @param {ReactReconcileTransaction} transaction
* @internal
*/
receiveComponent: function (nextText, transaction) {
if (nextText !== this._currentElement) {
this._currentElement = nextText;
var nextStringText = '' + nextText;
if (nextStringText !== this._stringText) {
// TODO: Save this as pending props and use performUpdateIfNecessary
// and/or updateComponent to do the actual update for consistency with
// other component types?
this._stringText = nextStringText;
var commentNodes = this.getHostNode();
DOMChildrenOperations.replaceDelimitedText(commentNodes[0], commentNodes[1], nextStringText);
}
}
},
getHostNode: function () {
var hostNode = this._commentNodes;
if (hostNode) {
return hostNode;
}
if (!this._closingComment) {
var openingComment = ReactDOMComponentTree.getNodeFromInstance(this);
var node = openingComment.nextSibling;
while (true) {
!(node != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Missing closing comment for text component %s', this._domID) : _prodInvariant('67', this._domID) : void 0;
if (node.nodeType === 8 && node.nodeValue === ' /react-text ') {
this._closingComment = node;
break;
}
node = node.nextSibling;
}
}
hostNode = [this._hostNode, this._closingComment];
this._commentNodes = hostNode;
return hostNode;
},
unmountComponent: function () {
this._closingComment = null;
this._commentNodes = null;
ReactDOMComponentTree.uncacheNode(this);
}
});
module.exports = ReactDOMTextComponent;
|