278 lines
8.3 KiB
JavaScript
278 lines
8.3 KiB
JavaScript
|
/***********************************************************************
|
||
|
|
|
||
|
|
A JavaScript tokenizer / parser / beautifier / compressor.
|
||
|
|
https://github.com/mishoo/UglifyJS2
|
||
|
|
|
||
|
|
-------------------------------- (C) ---------------------------------
|
||
|
|
|
||
|
|
Author: Mihai Bazon
|
||
|
|
<mihai.bazon@gmail.com>
|
||
|
|
http://mihai.bazon.net/blog
|
||
|
|
|
||
|
|
Distributed under the BSD license:
|
||
|
|
|
||
|
|
Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
|
||
|
|
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
|
||
|
|
* Redistributions of source code must retain the above
|
||
|
|
copyright notice, this list of conditions and the following
|
||
|
|
disclaimer.
|
||
|
|
|
||
|
|
* Redistributions in binary form must reproduce the above
|
||
|
|
copyright notice, this list of conditions and the following
|
||
|
|
disclaimer in the documentation and/or other materials
|
||
|
|
provided with the distribution.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
|
||
|
|
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
|
||
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
||
|
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
|
||
|
|
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
||
|
|
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
SUCH DAMAGE.
|
||
|
|
|
||
|
|
***********************************************************************/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
function characters(str) {
|
||
|
|
return str.split("");
|
||
|
|
}
|
||
|
|
|
||
|
|
function member(name, array) {
|
||
|
|
return array.indexOf(name) >= 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
function find_if(func, array) {
|
||
|
|
for (var i = array.length; --i >= 0;) if (func(array[i])) return array[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
function repeat_string(str, i) {
|
||
|
|
if (i <= 0) return "";
|
||
|
|
if (i == 1) return str;
|
||
|
|
var d = repeat_string(str, i >> 1);
|
||
|
|
d += d;
|
||
|
|
return i & 1 ? d + str : d;
|
||
|
|
}
|
||
|
|
|
||
|
|
function configure_error_stack(fn) {
|
||
|
|
Object.defineProperty(fn.prototype, "stack", {
|
||
|
|
get: function() {
|
||
|
|
var err = new Error(this.message);
|
||
|
|
err.name = this.name;
|
||
|
|
try {
|
||
|
|
throw err;
|
||
|
|
} catch(e) {
|
||
|
|
return e.stack;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function DefaultsError(msg, defs) {
|
||
|
|
this.message = msg;
|
||
|
|
this.defs = defs;
|
||
|
|
}
|
||
|
|
DefaultsError.prototype = Object.create(Error.prototype);
|
||
|
|
DefaultsError.prototype.constructor = DefaultsError;
|
||
|
|
DefaultsError.prototype.name = "DefaultsError";
|
||
|
|
configure_error_stack(DefaultsError);
|
||
|
|
|
||
|
|
function defaults(args, defs, croak) {
|
||
|
|
if (args === true) args = {};
|
||
|
|
var ret = args || {};
|
||
|
|
if (croak) for (var i in ret) if (HOP(ret, i) && !HOP(defs, i)) {
|
||
|
|
throw new DefaultsError("`" + i + "` is not a supported option", defs);
|
||
|
|
}
|
||
|
|
for (var i in defs) if (HOP(defs, i)) {
|
||
|
|
ret[i] = (args && HOP(args, i)) ? args[i] : defs[i];
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
function merge(obj, ext) {
|
||
|
|
var count = 0;
|
||
|
|
for (var i in ext) if (HOP(ext, i)) {
|
||
|
|
obj[i] = ext[i];
|
||
|
|
count++;
|
||
|
|
}
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
function noop() {}
|
||
|
|
function return_false() { return false; }
|
||
|
|
function return_true() { return true; }
|
||
|
|
function return_this() { return this; }
|
||
|
|
function return_null() { return null; }
|
||
|
|
|
||
|
|
var MAP = (function() {
|
||
|
|
function MAP(a, f, backwards) {
|
||
|
|
var ret = [], top = [], i;
|
||
|
|
function doit() {
|
||
|
|
var val = f(a[i], i);
|
||
|
|
var is_last = val instanceof Last;
|
||
|
|
if (is_last) val = val.v;
|
||
|
|
if (val instanceof AtTop) {
|
||
|
|
val = val.v;
|
||
|
|
if (val instanceof Splice) {
|
||
|
|
top.push.apply(top, backwards ? val.v.slice().reverse() : val.v);
|
||
|
|
} else {
|
||
|
|
top.push(val);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (val !== skip) {
|
||
|
|
if (val instanceof Splice) {
|
||
|
|
ret.push.apply(ret, backwards ? val.v.slice().reverse() : val.v);
|
||
|
|
} else {
|
||
|
|
ret.push(val);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return is_last;
|
||
|
|
}
|
||
|
|
if (Array.isArray(a)) {
|
||
|
|
if (backwards) {
|
||
|
|
for (i = a.length; --i >= 0;) if (doit()) break;
|
||
|
|
ret.reverse();
|
||
|
|
top.reverse();
|
||
|
|
} else {
|
||
|
|
for (i = 0; i < a.length; ++i) if (doit()) break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
for (i in a) if (HOP(a, i)) if (doit()) break;
|
||
|
|
}
|
||
|
|
return top.concat(ret);
|
||
|
|
}
|
||
|
|
MAP.at_top = function(val) { return new AtTop(val) };
|
||
|
|
MAP.splice = function(val) { return new Splice(val) };
|
||
|
|
MAP.last = function(val) { return new Last(val) };
|
||
|
|
var skip = MAP.skip = {};
|
||
|
|
function AtTop(val) { this.v = val }
|
||
|
|
function Splice(val) { this.v = val }
|
||
|
|
function Last(val) { this.v = val }
|
||
|
|
return MAP;
|
||
|
|
})();
|
||
|
|
|
||
|
|
function push_uniq(array, el) {
|
||
|
|
if (array.indexOf(el) < 0) return array.push(el);
|
||
|
|
}
|
||
|
|
|
||
|
|
function string_template(text, props) {
|
||
|
|
return text.replace(/\{(.+?)\}/g, function(str, p) {
|
||
|
|
return props && props[p];
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function remove(array, el) {
|
||
|
|
var index = array.indexOf(el);
|
||
|
|
if (index >= 0) array.splice(index, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
function makePredicate(words) {
|
||
|
|
if (!Array.isArray(words)) words = words.split(" ");
|
||
|
|
var map = Object.create(null);
|
||
|
|
words.forEach(function(word) {
|
||
|
|
map[word] = true;
|
||
|
|
});
|
||
|
|
return map;
|
||
|
|
}
|
||
|
|
|
||
|
|
function all(array, predicate) {
|
||
|
|
for (var i = array.length; --i >= 0;)
|
||
|
|
if (!predicate(array[i]))
|
||
|
|
return false;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
function Dictionary() {
|
||
|
|
this._values = Object.create(null);
|
||
|
|
this._size = 0;
|
||
|
|
}
|
||
|
|
Dictionary.prototype = {
|
||
|
|
set: function(key, val) {
|
||
|
|
if (!this.has(key)) ++this._size;
|
||
|
|
this._values["$" + key] = val;
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
add: function(key, val) {
|
||
|
|
if (this.has(key)) {
|
||
|
|
this.get(key).push(val);
|
||
|
|
} else {
|
||
|
|
this.set(key, [ val ]);
|
||
|
|
}
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
get: function(key) { return this._values["$" + key] },
|
||
|
|
del: function(key) {
|
||
|
|
if (this.has(key)) {
|
||
|
|
--this._size;
|
||
|
|
delete this._values["$" + key];
|
||
|
|
}
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
has: function(key) { return ("$" + key) in this._values },
|
||
|
|
each: function(f) {
|
||
|
|
for (var i in this._values)
|
||
|
|
f(this._values[i], i.substr(1));
|
||
|
|
},
|
||
|
|
size: function() {
|
||
|
|
return this._size;
|
||
|
|
},
|
||
|
|
map: function(f) {
|
||
|
|
var ret = [];
|
||
|
|
for (var i in this._values)
|
||
|
|
ret.push(f(this._values[i], i.substr(1)));
|
||
|
|
return ret;
|
||
|
|
},
|
||
|
|
clone: function() {
|
||
|
|
var ret = new Dictionary();
|
||
|
|
for (var i in this._values)
|
||
|
|
ret._values[i] = this._values[i];
|
||
|
|
ret._size = this._size;
|
||
|
|
return ret;
|
||
|
|
},
|
||
|
|
toObject: function() { return this._values }
|
||
|
|
};
|
||
|
|
Dictionary.fromObject = function(obj) {
|
||
|
|
var dict = new Dictionary();
|
||
|
|
dict._size = merge(dict._values, obj);
|
||
|
|
return dict;
|
||
|
|
};
|
||
|
|
|
||
|
|
function HOP(obj, prop) {
|
||
|
|
return Object.prototype.hasOwnProperty.call(obj, prop);
|
||
|
|
}
|
||
|
|
|
||
|
|
// return true if the node at the top of the stack (that means the
|
||
|
|
// innermost node in the current output) is lexically the first in
|
||
|
|
// a statement.
|
||
|
|
function first_in_statement(stack) {
|
||
|
|
var node = stack.parent(-1);
|
||
|
|
for (var i = 0, p; p = stack.parent(i++); node = p) {
|
||
|
|
if (p.TYPE == "Call") {
|
||
|
|
if (p.expression === node) continue;
|
||
|
|
} else if (p instanceof AST_Binary) {
|
||
|
|
if (p.left === node) continue;
|
||
|
|
} else if (p instanceof AST_Conditional) {
|
||
|
|
if (p.condition === node) continue;
|
||
|
|
} else if (p instanceof AST_PropAccess) {
|
||
|
|
if (p.expression === node) continue;
|
||
|
|
} else if (p instanceof AST_Sequence) {
|
||
|
|
if (p.expressions[0] === node) continue;
|
||
|
|
} else if (p instanceof AST_Statement) {
|
||
|
|
return p.body === node;
|
||
|
|
} else if (p instanceof AST_UnaryPostfix) {
|
||
|
|
if (p.expression === node) continue;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|