Make polymer-expressions/path-parser a simple CommonJS module.

The weird module.exports code broke the webpack parser.
This commit is contained in:
Hristo Deshev
2015-12-02 18:47:05 +02:00
parent 643f9bf901
commit fa264d9374

View File

@ -7,403 +7,387 @@
* subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
*/
(function (global) {
'use strict';
'use strict';
function detectEval() {
// Don't test for eval if we're running in a Chrome App environment.
// We check for APIs set that only exist in a Chrome App context.
if (typeof chrome !== 'undefined' && chrome.app && chrome.app.runtime) {
return false;
}
// Firefox OS Apps do not allow eval. This feature detection is very hacky
// but even if some other platform adds support for this function this code
// will continue to work.
if (typeof navigator != 'undefined' && navigator.getDeviceStorage) {
return false;
}
try {
var f = new Function('', 'return true;');
return f();
} catch (ex) {
return false;
}
function detectEval() {
// Don't test for eval if we're running in a Chrome App environment.
// We check for APIs set that only exist in a Chrome App context.
if (typeof chrome !== 'undefined' && chrome.app && chrome.app.runtime) {
return false;
}
var hasEval = detectEval();
function isIndex(s) {
return +s === s >>> 0 && s !== '';
// Firefox OS Apps do not allow eval. This feature detection is very hacky
// but even if some other platform adds support for this function this code
// will continue to work.
if (typeof navigator != 'undefined' && navigator.getDeviceStorage) {
return false;
}
function toNumber(s) {
return +s;
try {
var f = new Function('', 'return true;');
return f();
} catch (ex) {
return false;
}
}
function isObject(obj) {
return obj === Object(obj);
}
var hasEval = detectEval();
var numberIsNaN = global.Number.isNaN || function (value) {
return typeof value === 'number' && global.isNaN(value);
}
function isIndex(s) {
return +s === s >>> 0 && s !== '';
}
function areSameValue(left, right) {
if (left === right)
return left !== 0 || 1 / left === 1 / right;
if (numberIsNaN(left) && numberIsNaN(right))
return true;
function toNumber(s) {
return +s;
}
return left !== left && right !== right;
}
function isObject(obj) {
return obj === Object(obj);
}
var createObject = ('__proto__' in {}) ?
function (obj) { return obj; } :
function (obj) {
var proto = obj.__proto__;
if (!proto)
return obj;
var newObject = Object.create(proto);
Object.getOwnPropertyNames(obj).forEach(function (name) {
Object.defineProperty(newObject, name,
Object.getOwnPropertyDescriptor(obj, name));
});
return newObject;
};
var numberIsNaN = Number.isNaN || function (value) {
return typeof value === 'number' && isNaN(value);
}
var identStart = '[\$_a-zA-Z]';
var identPart = '[\$_a-zA-Z0-9]';
var identRegExp = new RegExp('^' + identStart + '+' + identPart + '*' + '$');
function areSameValue(left, right) {
if (left === right)
return left !== 0 || 1 / left === 1 / right;
if (numberIsNaN(left) && numberIsNaN(right))
return true;
function getPathCharType(char) {
if (char === undefined)
return 'eof';
return left !== left && right !== right;
}
var code = char.charCodeAt(0);
var createObject = ('__proto__' in {}) ?
function (obj) { return obj; } :
function (obj) {
var proto = obj.__proto__;
if (!proto)
return obj;
var newObject = Object.create(proto);
Object.getOwnPropertyNames(obj).forEach(function (name) {
Object.defineProperty(newObject, name,
Object.getOwnPropertyDescriptor(obj, name));
});
return newObject;
};
switch (code) {
case 0x5B: // [
case 0x5D: // ]
case 0x2E: // .
case 0x22: // "
case 0x27: // '
case 0x30: // 0
return char;
var identStart = '[\$_a-zA-Z]';
var identPart = '[\$_a-zA-Z0-9]';
var identRegExp = new RegExp('^' + identStart + '+' + identPart + '*' + '$');
case 0x5F: // _
case 0x24: // $
return 'ident';
function getPathCharType(char) {
if (char === undefined)
return 'eof';
case 0x20: // Space
case 0x09: // Tab
case 0x0A: // Newline
case 0x0D: // Return
case 0xA0: // No-break space
case 0xFEFF: // Byte Order Mark
case 0x2028: // Line Separator
case 0x2029: // Paragraph Separator
return 'ws';
}
var code = char.charCodeAt(0);
// a-z, A-Z
if ((0x61 <= code && code <= 0x7A) || (0x41 <= code && code <= 0x5A))
switch (code) {
case 0x5B: // [
case 0x5D: // ]
case 0x2E: // .
case 0x22: // "
case 0x27: // '
case 0x30: // 0
return char;
case 0x5F: // _
case 0x24: // $
return 'ident';
// 1-9
if (0x31 <= code && code <= 0x39)
return 'number';
return 'else';
case 0x20: // Space
case 0x09: // Tab
case 0x0A: // Newline
case 0x0D: // Return
case 0xA0: // No-break space
case 0xFEFF: // Byte Order Mark
case 0x2028: // Line Separator
case 0x2029: // Paragraph Separator
return 'ws';
}
var pathStateMachine = {
'beforePath': {
'ws': ['beforePath'],
'ident': ['inIdent', 'append'],
'[': ['beforeElement'],
'eof': ['afterPath']
},
// a-z, A-Z
if ((0x61 <= code && code <= 0x7A) || (0x41 <= code && code <= 0x5A))
return 'ident';
'inPath': {
'ws': ['inPath'],
'.': ['beforeIdent'],
'[': ['beforeElement'],
'eof': ['afterPath']
},
// 1-9
if (0x31 <= code && code <= 0x39)
return 'number';
'beforeIdent': {
'ws': ['beforeIdent'],
'ident': ['inIdent', 'append']
},
return 'else';
}
'inIdent': {
'ident': ['inIdent', 'append'],
'0': ['inIdent', 'append'],
'number': ['inIdent', 'append'],
'ws': ['inPath', 'push'],
'.': ['beforeIdent', 'push'],
'[': ['beforeElement', 'push'],
'eof': ['afterPath', 'push']
},
var pathStateMachine = {
'beforePath': {
'ws': ['beforePath'],
'ident': ['inIdent', 'append'],
'[': ['beforeElement'],
'eof': ['afterPath']
},
'beforeElement': {
'ws': ['beforeElement'],
'0': ['afterZero', 'append'],
'number': ['inIndex', 'append'],
"'": ['inSingleQuote', 'append', ''],
'"': ['inDoubleQuote', 'append', '']
},
'inPath': {
'ws': ['inPath'],
'.': ['beforeIdent'],
'[': ['beforeElement'],
'eof': ['afterPath']
},
'afterZero': {
'ws': ['afterElement', 'push'],
']': ['inPath', 'push']
},
'beforeIdent': {
'ws': ['beforeIdent'],
'ident': ['inIdent', 'append']
},
'inIndex': {
'0': ['inIndex', 'append'],
'number': ['inIndex', 'append'],
'ws': ['afterElement'],
']': ['inPath', 'push']
},
'inIdent': {
'ident': ['inIdent', 'append'],
'0': ['inIdent', 'append'],
'number': ['inIdent', 'append'],
'ws': ['inPath', 'push'],
'.': ['beforeIdent', 'push'],
'[': ['beforeElement', 'push'],
'eof': ['afterPath', 'push']
},
'inSingleQuote': {
"'": ['afterElement'],
'eof': ['error'],
'else': ['inSingleQuote', 'append']
},
'beforeElement': {
'ws': ['beforeElement'],
'0': ['afterZero', 'append'],
'number': ['inIndex', 'append'],
"'": ['inSingleQuote', 'append', ''],
'"': ['inDoubleQuote', 'append', '']
},
'inDoubleQuote': {
'"': ['afterElement'],
'eof': ['error'],
'else': ['inDoubleQuote', 'append']
},
'afterZero': {
'ws': ['afterElement', 'push'],
']': ['inPath', 'push']
},
'afterElement': {
'ws': ['afterElement'],
']': ['inPath', 'push']
}
'inIndex': {
'0': ['inIndex', 'append'],
'number': ['inIndex', 'append'],
'ws': ['afterElement'],
']': ['inPath', 'push']
},
'inSingleQuote': {
"'": ['afterElement'],
'eof': ['error'],
'else': ['inSingleQuote', 'append']
},
'inDoubleQuote': {
'"': ['afterElement'],
'eof': ['error'],
'else': ['inDoubleQuote', 'append']
},
'afterElement': {
'ws': ['afterElement'],
']': ['inPath', 'push']
}
}
function noop() { }
function noop() { }
function parsePath(path) {
var keys = [];
var index = -1;
var c, newChar, key, type, transition, action, typeMap, mode = 'beforePath';
function parsePath(path) {
var keys = [];
var index = -1;
var c, newChar, key, type, transition, action, typeMap, mode = 'beforePath';
var actions = {
push: function () {
if (key === undefined)
return;
keys.push(key);
key = undefined;
},
append: function () {
if (key === undefined)
key = newChar
else
key += newChar;
}
};
function maybeUnescapeQuote() {
if (index >= path.length)
var actions = {
push: function () {
if (key === undefined)
return;
var nextChar = path[index + 1];
if ((mode == 'inSingleQuote' && nextChar == "'") ||
(mode == 'inDoubleQuote' && nextChar == '"')) {
index++;
newChar = nextChar;
actions.append();
return true;
}
}
keys.push(key);
key = undefined;
},
while (mode) {
append: function () {
if (key === undefined)
key = newChar
else
key += newChar;
}
};
function maybeUnescapeQuote() {
if (index >= path.length)
return;
var nextChar = path[index + 1];
if ((mode == 'inSingleQuote' && nextChar == "'") ||
(mode == 'inDoubleQuote' && nextChar == '"')) {
index++;
c = path[index];
if (c == '\\' && maybeUnescapeQuote(mode))
continue;
type = getPathCharType(c);
typeMap = pathStateMachine[mode];
transition = typeMap[type] || typeMap['else'] || 'error';
if (transition == 'error')
return; // parse error;
mode = transition[0];
action = actions[transition[1]] || noop;
newChar = transition[2] === undefined ? c : transition[2];
action();
if (mode === 'afterPath') {
return keys;
}
}
return; // parse error
}
function isIdent(s) {
return identRegExp.test(s);
}
var constructorIsPrivate = {};
function Path(parts, privateToken) {
if (privateToken !== constructorIsPrivate)
throw Error('Use Path.get to retrieve path objects');
for (var i = 0; i < parts.length; i++) {
this.push(String(parts[i]));
}
if (hasEval && this.length) {
this.getValueFrom = this.compiledGetValueFromFn();
}
}
// TODO(rafaelw): Make simple LRU cache
var pathCache = {};
function getPath(pathString) {
if (pathString instanceof Path)
return pathString;
if (pathString == null || pathString.length == 0)
pathString = '';
if (typeof pathString != 'string') {
if (isIndex(pathString.length)) {
// Constructed with array-like (pre-parsed) keys
return new Path(pathString, constructorIsPrivate);
}
pathString = String(pathString);
}
var path = pathCache[pathString];
if (path)
return path;
var parts = parsePath(pathString);
if (!parts)
return invalidPath;
var path = new Path(parts, constructorIsPrivate);
pathCache[pathString] = path;
return path;
}
Path.get = getPath;
function formatAccessor(key) {
if (isIndex(key)) {
return '[' + key + ']';
} else {
return '["' + key.replace(/"/g, '\\"') + '"]';
}
}
Path.prototype = createObject({
__proto__: [],
valid: true,
toString: function () {
var pathString = '';
for (var i = 0; i < this.length; i++) {
var key = this[i];
if (isIdent(key)) {
pathString += i ? '.' + key : key;
} else {
pathString += formatAccessor(key);
}
}
return pathString;
},
getValueFrom: function (obj, directObserver) {
for (var i = 0; i < this.length; i++) {
if (obj == null)
return;
obj = obj[this[i]];
}
return obj;
},
iterateObjects: function (obj, observe) {
for (var i = 0; i < this.length; i++) {
if (i)
obj = obj[this[i - 1]];
if (!isObject(obj))
return;
observe(obj, this[i]);
}
},
compiledGetValueFromFn: function () {
var str = '';
var pathString = 'obj';
str += 'if (obj != null';
var i = 0;
var key;
for (; i < (this.length - 1) ; i++) {
key = this[i];
pathString += isIdent(key) ? '.' + key : formatAccessor(key);
str += ' &&\n ' + pathString + ' != null';
}
str += ')\n';
var key = this[i];
pathString += isIdent(key) ? '.' + key : formatAccessor(key);
str += ' return ' + pathString + ';\nelse\n return undefined;';
return new Function('obj', str);
},
setValueFrom: function (obj, value) {
if (!this.length)
return false;
for (var i = 0; i < this.length - 1; i++) {
if (!isObject(obj))
return false;
obj = obj[this[i]];
}
if (!isObject(obj))
return false;
obj[this[i]] = value;
newChar = nextChar;
actions.append();
return true;
}
});
var invalidPath = new Path('', constructorIsPrivate);
invalidPath.valid = false;
invalidPath.getValueFrom = invalidPath.setValueFrom = function () { };
// Export the observe-js object for **Node.js**, with
// backwards-compatibility for the old `require()` API. If we're in
// the browser, export as a global object.
var expose = global;
if (typeof exports !== 'undefined') {
if (typeof module !== 'undefined' && module.exports) {
expose = exports = module.exports;
}
expose = exports;
}
expose.Path = Path;
while (mode) {
index++;
c = path[index];
})(typeof global !== 'undefined' && global && typeof module !== 'undefined' && module ? global : this || window);
if (c == '\\' && maybeUnescapeQuote(mode))
continue;
type = getPathCharType(c);
typeMap = pathStateMachine[mode];
transition = typeMap[type] || typeMap['else'] || 'error';
if (transition == 'error')
return; // parse error;
mode = transition[0];
action = actions[transition[1]] || noop;
newChar = transition[2] === undefined ? c : transition[2];
action();
if (mode === 'afterPath') {
return keys;
}
}
return; // parse error
}
function isIdent(s) {
return identRegExp.test(s);
}
var constructorIsPrivate = {};
function Path(parts, privateToken) {
if (privateToken !== constructorIsPrivate)
throw Error('Use Path.get to retrieve path objects');
for (var i = 0; i < parts.length; i++) {
this.push(String(parts[i]));
}
if (hasEval && this.length) {
this.getValueFrom = this.compiledGetValueFromFn();
}
}
// TODO(rafaelw): Make simple LRU cache
var pathCache = {};
function getPath(pathString) {
if (pathString instanceof Path)
return pathString;
if (pathString == null || pathString.length == 0)
pathString = '';
if (typeof pathString != 'string') {
if (isIndex(pathString.length)) {
// Constructed with array-like (pre-parsed) keys
return new Path(pathString, constructorIsPrivate);
}
pathString = String(pathString);
}
var path = pathCache[pathString];
if (path)
return path;
var parts = parsePath(pathString);
if (!parts)
return invalidPath;
var path = new Path(parts, constructorIsPrivate);
pathCache[pathString] = path;
return path;
}
Path.get = getPath;
function formatAccessor(key) {
if (isIndex(key)) {
return '[' + key + ']';
} else {
return '["' + key.replace(/"/g, '\\"') + '"]';
}
}
Path.prototype = createObject({
__proto__: [],
valid: true,
toString: function () {
var pathString = '';
for (var i = 0; i < this.length; i++) {
var key = this[i];
if (isIdent(key)) {
pathString += i ? '.' + key : key;
} else {
pathString += formatAccessor(key);
}
}
return pathString;
},
getValueFrom: function (obj, directObserver) {
for (var i = 0; i < this.length; i++) {
if (obj == null)
return;
obj = obj[this[i]];
}
return obj;
},
iterateObjects: function (obj, observe) {
for (var i = 0; i < this.length; i++) {
if (i)
obj = obj[this[i - 1]];
if (!isObject(obj))
return;
observe(obj, this[i]);
}
},
compiledGetValueFromFn: function () {
var str = '';
var pathString = 'obj';
str += 'if (obj != null';
var i = 0;
var key;
for (; i < (this.length - 1) ; i++) {
key = this[i];
pathString += isIdent(key) ? '.' + key : formatAccessor(key);
str += ' &&\n ' + pathString + ' != null';
}
str += ')\n';
var key = this[i];
pathString += isIdent(key) ? '.' + key : formatAccessor(key);
str += ' return ' + pathString + ';\nelse\n return undefined;';
return new Function('obj', str);
},
setValueFrom: function (obj, value) {
if (!this.length)
return false;
for (var i = 0; i < this.length - 1; i++) {
if (!isObject(obj))
return false;
obj = obj[this[i]];
}
if (!isObject(obj))
return false;
obj[this[i]] = value;
return true;
}
});
var invalidPath = new Path('', constructorIsPrivate);
invalidPath.valid = false;
invalidPath.getValueFrom = invalidPath.setValueFrom = function () { };
exports.Path = Path;