File size: 5,063 Bytes
bc20498 |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 |
"use strict";
// DOMTokenList implementation based on https://github.com/Raynos/DOM-shim
var utils = require('./utils');
module.exports = DOMTokenList;
function DOMTokenList(getter, setter) {
this._getString = getter;
this._setString = setter;
this._length = 0;
this._lastStringValue = '';
this._update();
}
Object.defineProperties(DOMTokenList.prototype, {
length: { get: function() { return this._length; } },
item: { value: function(index) {
var list = getList(this);
if (index < 0 || index >= list.length) {
return null;
}
return list[index];
}},
contains: { value: function(token) {
token = String(token); // no error checking for contains()
var list = getList(this);
return list.indexOf(token) > -1;
}},
add: { value: function() {
var list = getList(this);
for (var i = 0, len = arguments.length; i < len; i++) {
var token = handleErrors(arguments[i]);
if (list.indexOf(token) < 0) {
list.push(token);
}
}
// Note: as per spec, if handleErrors() throws any errors, we never
// make it here and none of the changes take effect.
// Also per spec: we run the "update steps" even if no change was
// made (ie, if the token already existed)
this._update(list);
}},
remove: { value: function() {
var list = getList(this);
for (var i = 0, len = arguments.length; i < len; i++) {
var token = handleErrors(arguments[i]);
var index = list.indexOf(token);
if (index > -1) {
list.splice(index, 1);
}
}
// Note: as per spec, if handleErrors() throws any errors, we never
// make it here and none of the changes take effect.
// Also per spec: we run the "update steps" even if no change was
// made (ie, if the token wasn't previously present)
this._update(list);
}},
toggle: { value: function toggle(token, force) {
token = handleErrors(token);
if (this.contains(token)) {
if (force === undefined || force === false) {
this.remove(token);
return false;
}
return true;
} else {
if (force === undefined || force === true) {
this.add(token);
return true;
}
return false;
}
}},
replace: { value: function replace(token, newToken) {
// weird corner case of spec: if `token` contains whitespace, but
// `newToken` is the empty string, we must throw SyntaxError not
// InvalidCharacterError (sigh)
if (String(newToken)==='') { utils.SyntaxError(); }
token = handleErrors(token);
newToken = handleErrors(newToken);
var list = getList(this);
var idx = list.indexOf(token);
if (idx < 0) {
// Note that, per spec, we do not run the update steps on this path.
return false;
}
var idx2 = list.indexOf(newToken);
if (idx2 < 0) {
list[idx] = newToken;
} else {
// "replace the first instance of either `token` or `newToken` with
// `newToken` and remove all other instances"
if (idx < idx2) {
list[idx] = newToken;
list.splice(idx2, 1);
} else {
// idx2 is already `newToken`
list.splice(idx, 1);
}
}
this._update(list);
return true;
}},
toString: { value: function() {
return this._getString();
}},
value: {
get: function() {
return this._getString();
},
set: function(v) {
this._setString(v);
this._update();
}
},
// Called when the setter is called from outside this interface.
_update: { value: function(list) {
if (list) {
fixIndex(this, list);
this._setString(list.join(" ").trim());
} else {
fixIndex(this, getList(this));
}
this._lastStringValue = this._getString();
} },
});
function fixIndex(clist, list) {
var oldLength = clist._length;
var i;
clist._length = list.length;
for (i = 0; i < list.length; i++) {
clist[i] = list[i];
}
// Clear/free old entries.
for (; i < oldLength; i++) {
clist[i] = undefined;
}
}
function handleErrors(token) {
token = String(token);
if (token === "") {
utils.SyntaxError();
}
if (/[ \t\r\n\f]/.test(token)) {
utils.InvalidCharacterError();
}
return token;
}
function toArray(clist) {
var length = clist._length;
var arr = Array(length);
for (var i = 0; i < length; i++) {
arr[i] = clist[i];
}
return arr;
}
function getList(clist) {
var strProp = clist._getString();
if (strProp === clist._lastStringValue) {
return toArray(clist);
}
var str = strProp.replace(/(^[ \t\r\n\f]+)|([ \t\r\n\f]+$)/g, '');
if (str === "") {
return [];
} else {
var seen = Object.create(null);
return str.split(/[ \t\r\n\f]+/g).filter(function(n) {
var key = '$' + n;
if (seen[key]) { return false; }
seen[key] = true;
return true;
});
}
}
|