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
|
/**
* 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 ReactDOMSelection = require('./ReactDOMSelection');
var containsNode = require('fbjs/lib/containsNode');
var focusNode = require('fbjs/lib/focusNode');
var getActiveElement = require('fbjs/lib/getActiveElement');
function isInDocument(node) {
return containsNode(document.documentElement, node);
}
/**
* @ReactInputSelection: React input selection module. Based on Selection.js,
* but modified to be suitable for react and has a couple of bug fixes (doesn't
* assume buttons have range selections allowed).
* Input selection module for React.
*/
var ReactInputSelection = {
hasSelectionCapabilities: function (elem) {
var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
return nodeName && (nodeName === 'input' && elem.type === 'text' || nodeName === 'textarea' || elem.contentEditable === 'true');
},
getSelectionInformation: function () {
var focusedElem = getActiveElement();
return {
focusedElem: focusedElem,
selectionRange: ReactInputSelection.hasSelectionCapabilities(focusedElem) ? ReactInputSelection.getSelection(focusedElem) : null
};
},
/**
* @restoreSelection: If any selection information was potentially lost,
* restore it. This is useful when performing operations that could remove dom
* nodes and place them back in, resulting in focus being lost.
*/
restoreSelection: function (priorSelectionInformation) {
var curFocusedElem = getActiveElement();
var priorFocusedElem = priorSelectionInformation.focusedElem;
var priorSelectionRange = priorSelectionInformation.selectionRange;
if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {
if (ReactInputSelection.hasSelectionCapabilities(priorFocusedElem)) {
ReactInputSelection.setSelection(priorFocusedElem, priorSelectionRange);
}
focusNode(priorFocusedElem);
}
},
/**
* @getSelection: Gets the selection bounds of a focused textarea, input or
* contentEditable node.
* -@input: Look up selection bounds of this input
* -@return {start: selectionStart, end: selectionEnd}
*/
getSelection: function (input) {
var selection;
if ('selectionStart' in input) {
// Modern browser with input or textarea.
selection = {
start: input.selectionStart,
end: input.selectionEnd
};
} else if (document.selection && input.nodeName && input.nodeName.toLowerCase() === 'input') {
// IE8 input.
var range = document.selection.createRange();
// There can only be one selection per document in IE, so it must
// be in our element.
if (range.parentElement() === input) {
selection = {
start: -range.moveStart('character', -input.value.length),
end: -range.moveEnd('character', -input.value.length)
};
}
} else {
// Content editable or old IE textarea.
selection = ReactDOMSelection.getOffsets(input);
}
return selection || { start: 0, end: 0 };
},
/**
* @setSelection: Sets the selection bounds of a textarea or input and focuses
* the input.
* -@input Set selection bounds of this input or textarea
* -@offsets Object of same form that is returned from get*
*/
setSelection: function (input, offsets) {
var start = offsets.start;
var end = offsets.end;
if (end === undefined) {
end = start;
}
if ('selectionStart' in input) {
input.selectionStart = start;
input.selectionEnd = Math.min(end, input.value.length);
} else if (document.selection && input.nodeName && input.nodeName.toLowerCase() === 'input') {
var range = input.createTextRange();
range.collapse(true);
range.moveStart('character', start);
range.moveEnd('character', end - start);
range.select();
} else {
ReactDOMSelection.setOffsets(input, offsets);
}
}
};
module.exports = ReactInputSelection;
|
