347 lines
11 KiB
JavaScript
347 lines
11 KiB
JavaScript
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/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS2
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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function characters(str) {
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return str.split("");
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};
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function member(name, array) {
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return array.indexOf(name) >= 0;
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};
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function find_if(func, array) {
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for (var i = 0, n = array.length; i < n; ++i) {
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if (func(array[i]))
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return array[i];
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}
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};
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function repeat_string(str, i) {
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if (i <= 0) return "";
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if (i == 1) return str;
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var d = repeat_string(str, i >> 1);
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d += d;
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if (i & 1) d += str;
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return d;
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};
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function configure_error_stack(fn) {
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Object.defineProperty(fn.prototype, "stack", {
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get: function() {
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var err = new Error(this.message);
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err.name = this.name;
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try {
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throw err;
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} catch(e) {
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return e.stack;
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}
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}
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});
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}
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function DefaultsError(msg, defs) {
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this.message = msg;
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this.defs = defs;
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};
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DefaultsError.prototype = Object.create(Error.prototype);
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DefaultsError.prototype.constructor = DefaultsError;
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DefaultsError.prototype.name = "DefaultsError";
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configure_error_stack(DefaultsError);
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DefaultsError.croak = function(msg, defs) {
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throw new DefaultsError(msg, defs);
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};
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function defaults(args, defs, croak) {
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if (args === true)
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args = {};
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var ret = args || {};
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if (croak) for (var i in ret) if (HOP(ret, i) && !HOP(defs, i))
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DefaultsError.croak("`" + i + "` is not a supported option", defs);
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for (var i in defs) if (HOP(defs, i)) {
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ret[i] = (args && HOP(args, i)) ? args[i] : defs[i];
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}
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return ret;
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};
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function merge(obj, ext) {
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var count = 0;
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for (var i in ext) if (HOP(ext, i)) {
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obj[i] = ext[i];
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count++;
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}
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return count;
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};
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function noop() {}
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function return_false() { return false; }
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function return_true() { return true; }
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function return_this() { return this; }
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function return_null() { return null; }
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var MAP = (function(){
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function MAP(a, f, backwards) {
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var ret = [], top = [], i;
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function doit() {
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var val = f(a[i], i);
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var is_last = val instanceof Last;
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if (is_last) val = val.v;
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if (val instanceof AtTop) {
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val = val.v;
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if (val instanceof Splice) {
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top.push.apply(top, backwards ? val.v.slice().reverse() : val.v);
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} else {
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top.push(val);
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}
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}
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else if (val !== skip) {
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if (val instanceof Splice) {
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ret.push.apply(ret, backwards ? val.v.slice().reverse() : val.v);
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} else {
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ret.push(val);
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}
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}
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return is_last;
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};
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if (a instanceof Array) {
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if (backwards) {
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for (i = a.length; --i >= 0;) if (doit()) break;
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ret.reverse();
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top.reverse();
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} else {
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for (i = 0; i < a.length; ++i) if (doit()) break;
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}
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}
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else {
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for (i in a) if (HOP(a, i)) if (doit()) break;
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}
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return top.concat(ret);
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};
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MAP.at_top = function(val) { return new AtTop(val) };
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MAP.splice = function(val) { return new Splice(val) };
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MAP.last = function(val) { return new Last(val) };
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var skip = MAP.skip = {};
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function AtTop(val) { this.v = val };
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function Splice(val) { this.v = val };
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function Last(val) { this.v = val };
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return MAP;
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})();
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function push_uniq(array, el) {
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if (array.indexOf(el) < 0)
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array.push(el);
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};
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function string_template(text, props) {
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return text.replace(/\{(.+?)\}/g, function(str, p){
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return props && props[p];
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});
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};
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function remove(array, el) {
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for (var i = array.length; --i >= 0;) {
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if (array[i] === el) array.splice(i, 1);
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}
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};
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function mergeSort(array, cmp) {
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if (array.length < 2) return array.slice();
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function merge(a, b) {
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var r = [], ai = 0, bi = 0, i = 0;
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while (ai < a.length && bi < b.length) {
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cmp(a[ai], b[bi]) <= 0
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? r[i++] = a[ai++]
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: r[i++] = b[bi++];
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}
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if (ai < a.length) r.push.apply(r, a.slice(ai));
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if (bi < b.length) r.push.apply(r, b.slice(bi));
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return r;
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};
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function _ms(a) {
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if (a.length <= 1)
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return a;
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var m = Math.floor(a.length / 2), left = a.slice(0, m), right = a.slice(m);
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left = _ms(left);
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right = _ms(right);
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return merge(left, right);
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};
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return _ms(array);
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};
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// this function is taken from Acorn [1], written by Marijn Haverbeke
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// [1] https://github.com/marijnh/acorn
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function makePredicate(words) {
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if (!(words instanceof Array)) words = words.split(" ");
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var f = "", cats = [];
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out: for (var i = 0; i < words.length; ++i) {
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for (var j = 0; j < cats.length; ++j)
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if (cats[j][0].length == words[i].length) {
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cats[j].push(words[i]);
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continue out;
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}
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cats.push([words[i]]);
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}
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function quote(word) {
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return JSON.stringify(word).replace(/[\u2028\u2029]/g, function(s) {
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switch (s) {
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case "\u2028": return "\\u2028";
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case "\u2029": return "\\u2029";
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}
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return s;
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});
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}
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function compareTo(arr) {
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if (arr.length == 1) return f += "return str === " + quote(arr[0]) + ";";
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f += "switch(str){";
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for (var i = 0; i < arr.length; ++i) f += "case " + quote(arr[i]) + ":";
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f += "return true}return false;";
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}
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// When there are more than three length categories, an outer
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// switch first dispatches on the lengths, to save on comparisons.
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if (cats.length > 3) {
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cats.sort(function(a, b) {return b.length - a.length;});
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f += "switch(str.length){";
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for (var i = 0; i < cats.length; ++i) {
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var cat = cats[i];
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f += "case " + cat[0].length + ":";
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compareTo(cat);
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}
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f += "}";
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// Otherwise, simply generate a flat `switch` statement.
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} else {
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compareTo(words);
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}
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return new Function("str", f);
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};
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function all(array, predicate) {
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for (var i = array.length; --i >= 0;)
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if (!predicate(array[i]))
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return false;
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return true;
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};
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function Dictionary() {
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this._values = Object.create(null);
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this._size = 0;
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};
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Dictionary.prototype = {
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set: function(key, val) {
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if (!this.has(key)) ++this._size;
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this._values["$" + key] = val;
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return this;
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},
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add: function(key, val) {
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if (this.has(key)) {
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this.get(key).push(val);
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} else {
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this.set(key, [ val ]);
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}
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return this;
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},
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get: function(key) { return this._values["$" + key] },
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del: function(key) {
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if (this.has(key)) {
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--this._size;
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delete this._values["$" + key];
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}
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return this;
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},
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has: function(key) { return ("$" + key) in this._values },
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each: function(f) {
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for (var i in this._values)
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f(this._values[i], i.substr(1));
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},
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size: function() {
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return this._size;
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},
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map: function(f) {
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var ret = [];
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for (var i in this._values)
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ret.push(f(this._values[i], i.substr(1)));
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return ret;
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},
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clone: function() {
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var ret = new Dictionary();
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for (var i in this._values)
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ret._values[i] = this._values[i];
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ret._size = this._size;
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return ret;
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},
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toObject: function() { return this._values }
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};
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Dictionary.fromObject = function(obj) {
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var dict = new Dictionary();
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dict._size = merge(dict._values, obj);
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return dict;
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};
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function HOP(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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}
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// return true if the node at the top of the stack (that means the
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// innermost node in the current output) is lexically the first in
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// a statement.
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function first_in_statement(stack) {
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var node = stack.parent(-1);
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for (var i = 0, p; p = stack.parent(i); i++) {
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if (p instanceof AST_Statement && p.body === node)
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return true;
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if ((p instanceof AST_Sequence && p.expressions[0] === node) ||
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(p.TYPE == "Call" && p.expression === node ) ||
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(p instanceof AST_Dot && p.expression === node ) ||
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(p instanceof AST_Sub && p.expression === node ) ||
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(p instanceof AST_Conditional && p.condition === node ) ||
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(p instanceof AST_Binary && p.left === node ) ||
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(p instanceof AST_UnaryPostfix && p.expression === node ))
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{
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node = p;
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} else {
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return false;
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}
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}
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}
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