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+/***********************************************************************
+
+ A JavaScript tokenizer / parser / beautifier / compressor.
+ https://github.com/mishoo/UglifyJS2
+
+ -------------------------------- (C) ---------------------------------
+
+ Author: Mihai Bazon
+ <[email protected]>
+ http://mihai.bazon.net/blog
+
+ Distributed under the BSD license:
+
+ Copyright 2012 (c) Mihai Bazon <[email protected]>
+
+ 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 is_some_comments(comment) {
+ // multiline comment
+ return comment.type == "comment2" && /@preserve|@license|@cc_on/i.test(comment.value);
+}
+
+function OutputStream(options) {
+
+ var readonly = !options;
+ options = defaults(options, {
+ ascii_only : false,
+ beautify : false,
+ braces : false,
+ comments : false,
+ ie8 : false,
+ indent_level : 4,
+ indent_start : 0,
+ inline_script : true,
+ keep_quoted_props: false,
+ max_line_len : false,
+ preamble : null,
+ preserve_line : false,
+ quote_keys : false,
+ quote_style : 0,
+ semicolons : true,
+ shebang : true,
+ source_map : null,
+ webkit : false,
+ width : 80,
+ wrap_iife : false,
+ }, true);
+
+ // Convert comment option to RegExp if neccessary and set up comments filter
+ var comment_filter = return_false; // Default case, throw all comments away
+ if (options.comments) {
+ var comments = options.comments;
+ if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) {
+ var regex_pos = options.comments.lastIndexOf("/");
+ comments = new RegExp(
+ options.comments.substr(1, regex_pos - 1),
+ options.comments.substr(regex_pos + 1)
+ );
+ }
+ if (comments instanceof RegExp) {
+ comment_filter = function(comment) {
+ return comment.type != "comment5" && comments.test(comment.value);
+ };
+ } else if (typeof comments === "function") {
+ comment_filter = function(comment) {
+ return comment.type != "comment5" && comments(this, comment);
+ };
+ } else if (comments === "some") {
+ comment_filter = is_some_comments;
+ } else { // NOTE includes "all" option
+ comment_filter = return_true;
+ }
+ }
+
+ var indentation = 0;
+ var current_col = 0;
+ var current_line = 1;
+ var current_pos = 0;
+ var OUTPUT = "";
+
+ var to_utf8 = options.ascii_only ? function(str, identifier) {
+ return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
+ var code = ch.charCodeAt(0).toString(16);
+ if (code.length <= 2 && !identifier) {
+ while (code.length < 2) code = "0" + code;
+ return "\\x" + code;
+ } else {
+ while (code.length < 4) code = "0" + code;
+ return "\\u" + code;
+ }
+ });
+ } : function(str) {
+ var s = "";
+ for (var i = 0, j = 0; i < str.length; i++) {
+ var code = str.charCodeAt(i);
+ if (is_surrogate_pair_head(code)) {
+ if (is_surrogate_pair_tail(str.charCodeAt(i + 1))) {
+ i++;
+ continue;
+ }
+ } else if (!is_surrogate_pair_tail(code)) {
+ continue;
+ }
+ s += str.slice(j, i) + "\\u" + code.toString(16);
+ j = i + 1;
+ }
+ return j == 0 ? str : s + str.slice(j);
+ };
+
+ function make_string(str, quote) {
+ var dq = 0, sq = 0;
+ str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, function(s, i) {
+ switch (s) {
+ case '"': ++dq; return '"';
+ case "'": ++sq; return "'";
+ case "\\": return "\\\\";
+ case "\n": return "\\n";
+ case "\r": return "\\r";
+ case "\t": return "\\t";
+ case "\b": return "\\b";
+ case "\f": return "\\f";
+ case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
+ case "\u2028": return "\\u2028";
+ case "\u2029": return "\\u2029";
+ case "\ufeff": return "\\ufeff";
+ case "\0":
+ return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
+ }
+ return s;
+ });
+ function quote_single() {
+ return "'" + str.replace(/\x27/g, "\\'") + "'";
+ }
+ function quote_double() {
+ return '"' + str.replace(/\x22/g, '\\"') + '"';
+ }
+ str = to_utf8(str);
+ switch (options.quote_style) {
+ case 1:
+ return quote_single();
+ case 2:
+ return quote_double();
+ case 3:
+ return quote == "'" ? quote_single() : quote_double();
+ default:
+ return dq > sq ? quote_single() : quote_double();
+ }
+ }
+
+ function encode_string(str, quote) {
+ var ret = make_string(str, quote);
+ if (options.inline_script) {
+ ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2");
+ ret = ret.replace(/\x3c!--/g, "\\x3c!--");
+ ret = ret.replace(/--\x3e/g, "--\\x3e");
+ }
+ return ret;
+ }
+
+ function make_name(name) {
+ name = name.toString();
+ name = to_utf8(name, true);
+ return name;
+ }
+
+ function make_indent(back) {
+ return repeat_string(" ", options.indent_start + indentation - back * options.indent_level);
+ }
+
+ /* -----[ beautification/minification ]----- */
+
+ var has_parens = false;
+ var line_end = 0;
+ var line_fixed = true;
+ var might_need_space = false;
+ var might_need_semicolon = false;
+ var need_newline_indented = false;
+ var need_space = false;
+ var newline_insert = -1;
+ var last = "";
+ var mapping_token, mapping_name, mappings = options.source_map && [];
+
+ var adjust_mappings = mappings ? function(line, col) {
+ mappings.forEach(function(mapping) {
+ mapping.line += line;
+ mapping.col += col;
+ });
+ } : noop;
+
+ var flush_mappings = mappings ? function() {
+ mappings.forEach(function(mapping) {
+ options.source_map.add(
+ mapping.token.file,
+ mapping.line, mapping.col,
+ mapping.token.line, mapping.token.col,
+ !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name
+ );
+ });
+ mappings = [];
+ } : noop;
+
+ function insert_newlines(count) {
+ var index = OUTPUT.lastIndexOf("\n");
+ if (line_end < index) line_end = index;
+ var left = OUTPUT.slice(0, line_end);
+ var right = OUTPUT.slice(line_end);
+ adjust_mappings(count, right.length - current_col);
+ current_line += count;
+ current_pos += count;
+ current_col = right.length;
+ OUTPUT = left;
+ while (count--) OUTPUT += "\n";
+ OUTPUT += right;
+ }
+
+ var fix_line = options.max_line_len ? function() {
+ if (line_fixed) {
+ if (current_col > options.max_line_len) {
+ AST_Node.warn("Output exceeds {max_line_len} characters", options);
+ }
+ return;
+ }
+ if (current_col > options.max_line_len) insert_newlines(1);
+ line_fixed = true;
+ flush_mappings();
+ } : noop;
+
+ var requireSemicolonChars = makePredicate("( [ + * / - , .");
+
+ function print(str) {
+ str = String(str);
+ var ch = str.charAt(0);
+ if (need_newline_indented && ch) {
+ need_newline_indented = false;
+ if (ch != "\n") {
+ print("\n");
+ indent();
+ }
+ }
+ if (need_space && ch) {
+ need_space = false;
+ if (!/[\s;})]/.test(ch)) {
+ space();
+ }
+ }
+ newline_insert = -1;
+ var prev = last.slice(-1);
+ if (might_need_semicolon) {
+ might_need_semicolon = false;
+
+ if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") {
+ if (options.semicolons || requireSemicolonChars[ch]) {
+ OUTPUT += ";";
+ current_col++;
+ current_pos++;
+ } else {
+ fix_line();
+ OUTPUT += "\n";
+ current_pos++;
+ current_line++;
+ current_col = 0;
+
+ if (/^\s+$/.test(str)) {
+ // reset the semicolon flag, since we didn't print one
+ // now and might still have to later
+ might_need_semicolon = true;
+ }
+ }
+
+ if (!options.beautify)
+ might_need_space = false;
+ }
+ }
+
+ if (might_need_space) {
+ if (is_identifier_char(prev) && (is_identifier_char(ch) || ch == "\\")
+ || (ch == "/" && ch == prev)
+ || ((ch == "+" || ch == "-") && ch == last)
+ || str == "--" && last == "!"
+ || last == "--" && ch == ">") {
+ OUTPUT += " ";
+ current_col++;
+ current_pos++;
+ }
+ if (prev != "<" || str != "!") might_need_space = false;
+ }
+
+ if (mapping_token) {
+ mappings.push({
+ token: mapping_token,
+ name: mapping_name,
+ line: current_line,
+ col: current_col
+ });
+ mapping_token = false;
+ if (line_fixed) flush_mappings();
+ }
+
+ OUTPUT += str;
+ has_parens = str.slice(-1) == "(";
+ current_pos += str.length;
+ var a = str.split(/\r?\n/), n = a.length - 1;
+ current_line += n;
+ current_col += a[0].length;
+ if (n > 0) {
+ fix_line();
+ current_col = a[n].length;
+ }
+ last = str;
+ }
+
+ var space = options.beautify ? function() {
+ print(" ");
+ } : function() {
+ might_need_space = true;
+ };
+
+ var indent = options.beautify ? function(half) {
+ if (options.beautify) {
+ print(make_indent(half ? 0.5 : 0));
+ }
+ } : noop;
+
+ var with_indent = options.beautify ? function(col, cont) {
+ if (col === true) col = next_indent();
+ var save_indentation = indentation;
+ indentation = col;
+ var ret = cont();
+ indentation = save_indentation;
+ return ret;
+ } : function(col, cont) { return cont() };
+
+ var may_add_newline = options.max_line_len || options.preserve_line ? function() {
+ fix_line();
+ line_end = OUTPUT.length;
+ line_fixed = false;
+ } : noop;
+
+ var newline = options.beautify ? function() {
+ if (newline_insert < 0) return print("\n");
+ if (OUTPUT[newline_insert] != "\n") {
+ OUTPUT = OUTPUT.slice(0, newline_insert) + "\n" + OUTPUT.slice(newline_insert);
+ current_pos++;
+ current_line++;
+ }
+ newline_insert++;
+ } : may_add_newline;
+
+ var semicolon = options.beautify ? function() {
+ print(";");
+ } : function() {
+ might_need_semicolon = true;
+ };
+
+ function force_semicolon() {
+ if (might_need_semicolon) print(";");
+ print(";");
+ }
+
+ function next_indent() {
+ return indentation + options.indent_level;
+ }
+
+ function with_block(cont) {
+ var ret;
+ print("{");
+ newline();
+ with_indent(next_indent(), function() {
+ ret = cont();
+ });
+ indent();
+ print("}");
+ return ret;
+ }
+
+ function with_parens(cont) {
+ print("(");
+ may_add_newline();
+ //XXX: still nice to have that for argument lists
+ //var ret = with_indent(current_col, cont);
+ var ret = cont();
+ may_add_newline();
+ print(")");
+ return ret;
+ }
+
+ function with_square(cont) {
+ print("[");
+ may_add_newline();
+ //var ret = with_indent(current_col, cont);
+ var ret = cont();
+ may_add_newline();
+ print("]");
+ return ret;
+ }
+
+ function comma() {
+ may_add_newline();
+ print(",");
+ may_add_newline();
+ space();
+ }
+
+ function colon() {
+ print(":");
+ space();
+ }
+
+ var add_mapping = mappings ? function(token, name) {
+ mapping_token = token;
+ mapping_name = name;
+ } : noop;
+
+ function get() {
+ if (!line_fixed) fix_line();
+ return OUTPUT;
+ }
+
+ function has_nlb() {
+ var index = OUTPUT.lastIndexOf("\n");
+ return /^ *$/.test(OUTPUT.slice(index + 1));
+ }
+
+ function prepend_comments(node) {
+ var self = this;
+ var scan = node instanceof AST_Exit && node.value;
+ var comments = dump(node);
+ if (!comments) comments = [];
+
+ if (scan) {
+ var tw = new TreeWalker(function(node) {
+ var parent = tw.parent();
+ if (parent instanceof AST_Exit
+ || parent instanceof AST_Binary && parent.left === node
+ || parent.TYPE == "Call" && parent.expression === node
+ || parent instanceof AST_Conditional && parent.condition === node
+ || parent instanceof AST_Dot && parent.expression === node
+ || parent instanceof AST_Sequence && parent.expressions[0] === node
+ || parent instanceof AST_Sub && parent.expression === node
+ || parent instanceof AST_UnaryPostfix) {
+ var before = dump(node);
+ if (before) comments = comments.concat(before);
+ } else {
+ return true;
+ }
+ });
+ tw.push(node);
+ node.value.walk(tw);
+ }
+
+ if (current_pos == 0) {
+ if (comments.length > 0 && options.shebang && comments[0].type == "comment5") {
+ print("#!" + comments.shift().value + "\n");
+ indent();
+ }
+ var preamble = options.preamble;
+ if (preamble) {
+ print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
+ }
+ }
+
+ comments = comments.filter(comment_filter, node);
+ if (comments.length == 0) return;
+ var last_nlb = has_nlb();
+ comments.forEach(function(c, i) {
+ if (!last_nlb) {
+ if (c.nlb) {
+ print("\n");
+ indent();
+ last_nlb = true;
+ } else if (i > 0) {
+ space();
+ }
+ }
+ if (/comment[134]/.test(c.type)) {
+ print("//" + c.value.replace(/[@#]__PURE__/g, ' ') + "\n");
+ indent();
+ last_nlb = true;
+ } else if (c.type == "comment2") {
+ print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/");
+ last_nlb = false;
+ }
+ });
+ if (!last_nlb) {
+ if (node.start.nlb) {
+ print("\n");
+ indent();
+ } else {
+ space();
+ }
+ }
+
+ function dump(node) {
+ var token = node.start;
+ if (!token) {
+ if (!scan) return;
+ node.start = token = new AST_Token();
+ }
+ var comments = token.comments_before;
+ if (!comments) {
+ if (!scan) return;
+ token.comments_before = comments = [];
+ }
+ if (comments._dumped === self) return;
+ comments._dumped = self;
+ return comments;
+ }
+ }
+
+ function append_comments(node, tail) {
+ var self = this;
+ var token = node.end;
+ if (!token) return;
+ var comments = token[tail ? "comments_before" : "comments_after"];
+ if (!comments || comments._dumped === self) return;
+ if (!(node instanceof AST_Statement || all(comments, function(c) {
+ return !/comment[134]/.test(c.type);
+ }))) return;
+ comments._dumped = self;
+ var insert = OUTPUT.length;
+ comments.filter(comment_filter, node).forEach(function(c, i) {
+ need_space = false;
+ if (need_newline_indented) {
+ print("\n");
+ indent();
+ need_newline_indented = false;
+ } else if (c.nlb && (i > 0 || !has_nlb())) {
+ print("\n");
+ indent();
+ } else if (i > 0 || !tail) {
+ space();
+ }
+ if (/comment[134]/.test(c.type)) {
+ print("//" + c.value.replace(/[@#]__PURE__/g, ' '));
+ need_newline_indented = true;
+ } else if (c.type == "comment2") {
+ print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/");
+ need_space = true;
+ }
+ });
+ if (OUTPUT.length > insert) newline_insert = insert;
+ }
+
+ var stack = [];
+ return {
+ get : get,
+ toString : get,
+ indent : indent,
+ indentation : function() { return indentation },
+ current_width : function() { return current_col - indentation },
+ should_break : function() { return options.width && this.current_width() >= options.width },
+ has_parens : function() { return has_parens },
+ newline : newline,
+ print : print,
+ space : space,
+ comma : comma,
+ colon : colon,
+ last : function() { return last },
+ semicolon : semicolon,
+ force_semicolon : force_semicolon,
+ to_utf8 : to_utf8,
+ print_name : function(name) { print(make_name(name)) },
+ print_string : function(str, quote) { print(encode_string(str, quote)) },
+ next_indent : next_indent,
+ with_indent : with_indent,
+ with_block : with_block,
+ with_parens : with_parens,
+ with_square : with_square,
+ add_mapping : add_mapping,
+ option : function(opt) { return options[opt] },
+ prepend_comments: readonly ? noop : prepend_comments,
+ append_comments : readonly || comment_filter === return_false ? noop : append_comments,
+ line : function() { return current_line },
+ col : function() { return current_col },
+ pos : function() { return current_pos },
+ push_node : function(node) { stack.push(node) },
+ pop_node : options.preserve_line ? function() {
+ var node = stack.pop();
+ if (node.start && node.start.line > current_line) {
+ insert_newlines(node.start.line - current_line);
+ }
+ } : function() {
+ stack.pop();
+ },
+ parent : function(n) {
+ return stack[stack.length - 2 - (n || 0)];
+ }
+ };
+}
+
+/* -----[ code generators ]----- */
+
+(function() {
+
+ /* -----[ utils ]----- */
+
+ function DEFPRINT(nodetype, generator) {
+ nodetype.DEFMETHOD("_codegen", generator);
+ }
+
+ var use_asm = false;
+
+ AST_Node.DEFMETHOD("print", function(stream, force_parens) {
+ var self = this, generator = self._codegen;
+ function doit() {
+ stream.prepend_comments(self);
+ self.add_source_map(stream);
+ generator(self, stream);
+ stream.append_comments(self);
+ }
+ stream.push_node(self);
+ if (force_parens || self.needs_parens(stream)) {
+ stream.with_parens(doit);
+ } else {
+ doit();
+ }
+ stream.pop_node();
+ });
+ AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
+
+ AST_Node.DEFMETHOD("print_to_string", function(options) {
+ var s = OutputStream(options);
+ this.print(s);
+ return s.get();
+ });
+
+ /* -----[ PARENTHESES ]----- */
+
+ function PARENS(nodetype, func) {
+ if (Array.isArray(nodetype)) {
+ nodetype.forEach(function(nodetype) {
+ PARENS(nodetype, func);
+ });
+ } else {
+ nodetype.DEFMETHOD("needs_parens", func);
+ }
+ }
+
+ PARENS(AST_Node, return_false);
+
+ // a function expression needs parens around it when it's provably
+ // the first token to appear in a statement.
+ PARENS(AST_Function, function(output) {
+ if (!output.has_parens() && first_in_statement(output)) return true;
+ if (output.option('webkit')) {
+ var p = output.parent();
+ if (p instanceof AST_PropAccess && p.expression === this) return true;
+ }
+ if (output.option('wrap_iife')) {
+ var p = output.parent();
+ if (p instanceof AST_Call && p.expression === this) return true;
+ }
+ });
+
+ // same goes for an object literal, because otherwise it would be
+ // interpreted as a block of code.
+ PARENS(AST_Object, function(output) {
+ return !output.has_parens() && first_in_statement(output);
+ });
+
+ PARENS(AST_Unary, function(output) {
+ var p = output.parent();
+ return p instanceof AST_PropAccess && p.expression === this
+ || p instanceof AST_Call && p.expression === this;
+ });
+
+ PARENS(AST_Sequence, function(output) {
+ var p = output.parent();
+ // (foo, bar)() or foo(1, (2, 3), 4)
+ return p instanceof AST_Call
+ // !(foo, bar, baz)
+ || p instanceof AST_Unary
+ // 1 + (2, 3) + 4 ==> 8
+ || p instanceof AST_Binary
+ // var a = (1, 2), b = a + a; ==> b == 4
+ || p instanceof AST_VarDef
+ // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
+ || p instanceof AST_PropAccess && p.expression === this
+ // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
+ || p instanceof AST_Array
+ // { foo: (1, 2) }.foo ==> 2
+ || p instanceof AST_ObjectProperty
+ // (false, true) ? (a = 10, b = 20) : (c = 30)
+ // ==> 20 (side effect, set a := 10 and b := 20)
+ || p instanceof AST_Conditional;
+ });
+
+ PARENS(AST_Binary, function(output) {
+ var p = output.parent();
+ // (foo && bar)()
+ if (p instanceof AST_Call && p.expression === this)
+ return true;
+ // typeof (foo && bar)
+ if (p instanceof AST_Unary)
+ return true;
+ // (foo && bar)["prop"], (foo && bar).prop
+ if (p instanceof AST_PropAccess && p.expression === this)
+ return true;
+ // this deals with precedence: 3 * (2 + 1)
+ if (p instanceof AST_Binary) {
+ var po = p.operator, pp = PRECEDENCE[po];
+ var so = this.operator, sp = PRECEDENCE[so];
+ if (pp > sp
+ || (pp == sp
+ && this === p.right)) {
+ return true;
+ }
+ }
+ });
+
+ PARENS(AST_PropAccess, function(output) {
+ var p = output.parent();
+ if (p instanceof AST_New && p.expression === this) {
+ // i.e. new (foo.bar().baz)
+ //
+ // if there's one call into this subtree, then we need
+ // parens around it too, otherwise the call will be
+ // interpreted as passing the arguments to the upper New
+ // expression.
+ var parens = false;
+ this.walk(new TreeWalker(function(node) {
+ if (parens || node instanceof AST_Scope) return true;
+ if (node instanceof AST_Call) {
+ parens = true;
+ return true;
+ }
+ }));
+ return parens;
+ }
+ });
+
+ PARENS(AST_Call, function(output) {
+ var p = output.parent();
+ if (p instanceof AST_New && p.expression === this) return true;
+ // https://bugs.webkit.org/show_bug.cgi?id=123506
+ if (output.option('webkit')) {
+ var g = output.parent(1);
+ return this.expression instanceof AST_Function
+ && p instanceof AST_PropAccess
+ && p.expression === this
+ && g instanceof AST_Assign
+ && g.left === p;
+ }
+ });
+
+ PARENS(AST_New, function(output) {
+ var p = output.parent();
+ if (!need_constructor_parens(this, output)
+ && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
+ || p instanceof AST_Call && p.expression === this)) // (new foo)(bar)
+ return true;
+ });
+
+ PARENS(AST_Number, function(output) {
+ var p = output.parent();
+ if (p instanceof AST_PropAccess && p.expression === this) {
+ var value = this.value;
+ // https://github.com/mishoo/UglifyJS2/issues/115
+ // https://github.com/mishoo/UglifyJS2/pull/1009
+ if (value < 0 || /^0/.test(make_num(value))) {
+ return true;
+ }
+ }
+ });
+
+ PARENS([ AST_Assign, AST_Conditional ], function(output) {
+ var p = output.parent();
+ // !(a = false) → true
+ if (p instanceof AST_Unary)
+ return true;
+ // 1 + (a = 2) + 3 → 6, side effect setting a = 2
+ if (p instanceof AST_Binary && !(p instanceof AST_Assign))
+ return true;
+ // (a = func)() —or— new (a = Object)()
+ if (p instanceof AST_Call && p.expression === this)
+ return true;
+ // (a = foo) ? bar : baz
+ if (p instanceof AST_Conditional && p.condition === this)
+ return true;
+ // (a = foo)["prop"] —or— (a = foo).prop
+ if (p instanceof AST_PropAccess && p.expression === this)
+ return true;
+ });
+
+ /* -----[ PRINTERS ]----- */
+
+ DEFPRINT(AST_Directive, function(self, output) {
+ var quote = self.quote;
+ var value = self.value;
+ switch (output.option("quote_style")) {
+ case 0:
+ case 2:
+ if (value.indexOf('"') == -1) quote = '"';
+ break;
+ case 1:
+ if (value.indexOf("'") == -1) quote = "'";
+ break;
+ }
+ output.print(quote + value + quote);
+ output.semicolon();
+ });
+ DEFPRINT(AST_Debugger, function(self, output) {
+ output.print("debugger");
+ output.semicolon();
+ });
+
+ /* -----[ statements ]----- */
+
+ function display_body(body, is_toplevel, output, allow_directives) {
+ var last = body.length - 1;
+ var in_directive = allow_directives;
+ var was_asm = use_asm;
+ body.forEach(function(stmt, i) {
+ if (in_directive) {
+ if (stmt instanceof AST_Directive) {
+ if (stmt.value == "use asm") use_asm = true;
+ } else if (!(stmt instanceof AST_EmptyStatement)) {
+ if (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String) {
+ output.force_semicolon();
+ }
+ in_directive = false;
+ }
+ }
+ if (stmt instanceof AST_EmptyStatement) return;
+ output.indent();
+ stmt.print(output);
+ if (i == last && is_toplevel) return;
+ output.newline();
+ if (is_toplevel) output.newline();
+ });
+ use_asm = was_asm;
+ }
+
+ AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
+ force_statement(this.body, output);
+ });
+
+ DEFPRINT(AST_Statement, function(self, output) {
+ self.body.print(output);
+ output.semicolon();
+ });
+ DEFPRINT(AST_Toplevel, function(self, output) {
+ display_body(self.body, true, output, true);
+ output.print("");
+ });
+ DEFPRINT(AST_LabeledStatement, function(self, output) {
+ self.label.print(output);
+ output.colon();
+ self.body.print(output);
+ });
+ DEFPRINT(AST_SimpleStatement, function(self, output) {
+ self.body.print(output);
+ output.semicolon();
+ });
+ function print_braced_empty(self, output) {
+ output.print("{");
+ output.with_indent(output.next_indent(), function() {
+ output.append_comments(self, true);
+ });
+ output.print("}");
+ }
+ function print_braced(self, output, allow_directives) {
+ if (self.body.length > 0) {
+ output.with_block(function() {
+ display_body(self.body, false, output, allow_directives);
+ });
+ } else print_braced_empty(self, output);
+ }
+ DEFPRINT(AST_BlockStatement, function(self, output) {
+ print_braced(self, output);
+ });
+ DEFPRINT(AST_EmptyStatement, function(self, output) {
+ output.semicolon();
+ });
+ DEFPRINT(AST_Do, function(self, output) {
+ output.print("do");
+ output.space();
+ make_block(self.body, output);
+ output.space();
+ output.print("while");
+ output.space();
+ output.with_parens(function() {
+ self.condition.print(output);
+ });
+ output.semicolon();
+ });
+ DEFPRINT(AST_While, function(self, output) {
+ output.print("while");
+ output.space();
+ output.with_parens(function() {
+ self.condition.print(output);
+ });
+ output.space();
+ self._do_print_body(output);
+ });
+ DEFPRINT(AST_For, function(self, output) {
+ output.print("for");
+ output.space();
+ output.with_parens(function() {
+ if (self.init) {
+ if (self.init instanceof AST_Definitions) {
+ self.init.print(output);
+ } else {
+ parenthesize_for_noin(self.init, output, true);
+ }
+ output.print(";");
+ output.space();
+ } else {
+ output.print(";");
+ }
+ if (self.condition) {
+ self.condition.print(output);
+ output.print(";");
+ output.space();
+ } else {
+ output.print(";");
+ }
+ if (self.step) {
+ self.step.print(output);
+ }
+ });
+ output.space();
+ self._do_print_body(output);
+ });
+ DEFPRINT(AST_ForIn, function(self, output) {
+ output.print("for");
+ output.space();
+ output.with_parens(function() {
+ self.init.print(output);
+ output.space();
+ output.print("in");
+ output.space();
+ self.object.print(output);
+ });
+ output.space();
+ self._do_print_body(output);
+ });
+ DEFPRINT(AST_With, function(self, output) {
+ output.print("with");
+ output.space();
+ output.with_parens(function() {
+ self.expression.print(output);
+ });
+ output.space();
+ self._do_print_body(output);
+ });
+
+ /* -----[ functions ]----- */
+ AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) {
+ var self = this;
+ if (!nokeyword) {
+ output.print("function");
+ }
+ if (self.name) {
+ output.space();
+ self.name.print(output);
+ }
+ output.with_parens(function() {
+ self.argnames.forEach(function(arg, i) {
+ if (i) output.comma();
+ arg.print(output);
+ });
+ });
+ output.space();
+ print_braced(self, output, true);
+ });
+ DEFPRINT(AST_Lambda, function(self, output) {
+ self._do_print(output);
+ });
+
+ /* -----[ jumps ]----- */
+ function print_jump(output, kind, target) {
+ output.print(kind);
+ if (target) {
+ output.space();
+ target.print(output);
+ }
+ output.semicolon();
+ }
+
+ DEFPRINT(AST_Return, function(self, output) {
+ print_jump(output, "return", self.value);
+ });
+ DEFPRINT(AST_Throw, function(self, output) {
+ print_jump(output, "throw", self.value);
+ });
+ DEFPRINT(AST_Break, function(self, output) {
+ print_jump(output, "break", self.label);
+ });
+ DEFPRINT(AST_Continue, function(self, output) {
+ print_jump(output, "continue", self.label);
+ });
+
+ /* -----[ if ]----- */
+ function make_then(self, output) {
+ var b = self.body;
+ if (output.option("braces")
+ || output.option("ie8") && b instanceof AST_Do)
+ return make_block(b, output);
+ // The squeezer replaces "block"-s that contain only a single
+ // statement with the statement itself; technically, the AST
+ // is correct, but this can create problems when we output an
+ // IF having an ELSE clause where the THEN clause ends in an
+ // IF *without* an ELSE block (then the outer ELSE would refer
+ // to the inner IF). This function checks for this case and
+ // adds the block braces if needed.
+ if (!b) return output.force_semicolon();
+ while (true) {
+ if (b instanceof AST_If) {
+ if (!b.alternative) {
+ make_block(self.body, output);
+ return;
+ }
+ b = b.alternative;
+ } else if (b instanceof AST_StatementWithBody) {
+ b = b.body;
+ } else break;
+ }
+ force_statement(self.body, output);
+ }
+ DEFPRINT(AST_If, function(self, output) {
+ output.print("if");
+ output.space();
+ output.with_parens(function() {
+ self.condition.print(output);
+ });
+ output.space();
+ if (self.alternative) {
+ make_then(self, output);
+ output.space();
+ output.print("else");
+ output.space();
+ if (self.alternative instanceof AST_If)
+ self.alternative.print(output);
+ else
+ force_statement(self.alternative, output);
+ } else {
+ self._do_print_body(output);
+ }
+ });
+
+ /* -----[ switch ]----- */
+ DEFPRINT(AST_Switch, function(self, output) {
+ output.print("switch");
+ output.space();
+ output.with_parens(function() {
+ self.expression.print(output);
+ });
+ output.space();
+ var last = self.body.length - 1;
+ if (last < 0) print_braced_empty(self, output);
+ else output.with_block(function() {
+ self.body.forEach(function(branch, i) {
+ output.indent(true);
+ branch.print(output);
+ if (i < last && branch.body.length > 0)
+ output.newline();
+ });
+ });
+ });
+ AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) {
+ output.newline();
+ this.body.forEach(function(stmt) {
+ output.indent();
+ stmt.print(output);
+ output.newline();
+ });
+ });
+ DEFPRINT(AST_Default, function(self, output) {
+ output.print("default:");
+ self._do_print_body(output);
+ });
+ DEFPRINT(AST_Case, function(self, output) {
+ output.print("case");
+ output.space();
+ self.expression.print(output);
+ output.print(":");
+ self._do_print_body(output);
+ });
+
+ /* -----[ exceptions ]----- */
+ DEFPRINT(AST_Try, function(self, output) {
+ output.print("try");
+ output.space();
+ print_braced(self, output);
+ if (self.bcatch) {
+ output.space();
+ self.bcatch.print(output);
+ }
+ if (self.bfinally) {
+ output.space();
+ self.bfinally.print(output);
+ }
+ });
+ DEFPRINT(AST_Catch, function(self, output) {
+ output.print("catch");
+ output.space();
+ output.with_parens(function() {
+ self.argname.print(output);
+ });
+ output.space();
+ print_braced(self, output);
+ });
+ DEFPRINT(AST_Finally, function(self, output) {
+ output.print("finally");
+ output.space();
+ print_braced(self, output);
+ });
+
+ DEFPRINT(AST_Var, function(self, output) {
+ output.print("var");
+ output.space();
+ self.definitions.forEach(function(def, i) {
+ if (i) output.comma();
+ def.print(output);
+ });
+ var p = output.parent();
+ if (p && p.init !== self || !(p instanceof AST_For || p instanceof AST_ForIn)) output.semicolon();
+ });
+
+ function parenthesize_for_noin(node, output, noin) {
+ var parens = false;
+ // need to take some precautions here:
+ // https://github.com/mishoo/UglifyJS2/issues/60
+ if (noin) node.walk(new TreeWalker(function(node) {
+ if (parens || node instanceof AST_Scope) return true;
+ if (node instanceof AST_Binary && node.operator == "in") {
+ parens = true;
+ return true;
+ }
+ }));
+ node.print(output, parens);
+ }
+
+ DEFPRINT(AST_VarDef, function(self, output) {
+ self.name.print(output);
+ if (self.value) {
+ output.space();
+ output.print("=");
+ output.space();
+ var p = output.parent(1);
+ var noin = p instanceof AST_For || p instanceof AST_ForIn;
+ parenthesize_for_noin(self.value, output, noin);
+ }
+ });
+
+ /* -----[ other expressions ]----- */
+ DEFPRINT(AST_Call, function(self, output) {
+ self.expression.print(output);
+ if (self instanceof AST_New && !need_constructor_parens(self, output))
+ return;
+ if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
+ output.add_mapping(self.start);
+ }
+ output.with_parens(function() {
+ self.args.forEach(function(expr, i) {
+ if (i) output.comma();
+ expr.print(output);
+ });
+ });
+ });
+ DEFPRINT(AST_New, function(self, output) {
+ output.print("new");
+ output.space();
+ AST_Call.prototype._codegen(self, output);
+ });
+ DEFPRINT(AST_Sequence, function(self, output) {
+ self.expressions.forEach(function(node, index) {
+ if (index > 0) {
+ output.comma();
+ if (output.should_break()) {
+ output.newline();
+ output.indent();
+ }
+ }
+ node.print(output);
+ });
+ });
+ DEFPRINT(AST_Dot, function(self, output) {
+ var expr = self.expression;
+ expr.print(output);
+ var prop = self.property;
+ if (output.option("ie8") && RESERVED_WORDS[prop]) {
+ output.print("[");
+ output.add_mapping(self.end);
+ output.print_string(prop);
+ output.print("]");
+ } else {
+ if (expr instanceof AST_Number && expr.value >= 0) {
+ if (!/[xa-f.)]/i.test(output.last())) {
+ output.print(".");
+ }
+ }
+ output.print(".");
+ // the name after dot would be mapped about here.
+ output.add_mapping(self.end);
+ output.print_name(prop);
+ }
+ });
+ DEFPRINT(AST_Sub, function(self, output) {
+ self.expression.print(output);
+ output.print("[");
+ self.property.print(output);
+ output.print("]");
+ });
+ DEFPRINT(AST_UnaryPrefix, function(self, output) {
+ var op = self.operator;
+ output.print(op);
+ if (/^[a-z]/i.test(op)
+ || (/[+-]$/.test(op)
+ && self.expression instanceof AST_UnaryPrefix
+ && /^[+-]/.test(self.expression.operator))) {
+ output.space();
+ }
+ self.expression.print(output);
+ });
+ DEFPRINT(AST_UnaryPostfix, function(self, output) {
+ self.expression.print(output);
+ output.print(self.operator);
+ });
+ DEFPRINT(AST_Binary, function(self, output) {
+ self.left.print(output);
+ output.space();
+ output.print(self.operator);
+ output.space();
+ self.right.print(output);
+ });
+ DEFPRINT(AST_Conditional, function(self, output) {
+ self.condition.print(output);
+ output.space();
+ output.print("?");
+ output.space();
+ self.consequent.print(output);
+ output.space();
+ output.colon();
+ self.alternative.print(output);
+ });
+
+ /* -----[ literals ]----- */
+ DEFPRINT(AST_Array, function(self, output) {
+ output.with_square(function() {
+ var a = self.elements, len = a.length;
+ if (len > 0) output.space();
+ a.forEach(function(exp, i) {
+ if (i) output.comma();
+ exp.print(output);
+ // If the final element is a hole, we need to make sure it
+ // doesn't look like a trailing comma, by inserting an actual
+ // trailing comma.
+ if (i === len - 1 && exp instanceof AST_Hole)
+ output.comma();
+ });
+ if (len > 0) output.space();
+ });
+ });
+ DEFPRINT(AST_Object, function(self, output) {
+ if (self.properties.length > 0) output.with_block(function() {
+ self.properties.forEach(function(prop, i) {
+ if (i) {
+ output.print(",");
+ output.newline();
+ }
+ output.indent();
+ prop.print(output);
+ });
+ output.newline();
+ });
+ else print_braced_empty(self, output);
+ });
+
+ function print_property_name(key, quote, output) {
+ if (output.option("quote_keys")) {
+ output.print_string(key);
+ } else if ("" + +key == key && key >= 0) {
+ output.print(make_num(key));
+ } else if (RESERVED_WORDS[key] ? !output.option("ie8") : is_identifier_string(key)) {
+ if (quote && output.option("keep_quoted_props")) {
+ output.print_string(key, quote);
+ } else {
+ output.print_name(key);
+ }
+ } else {
+ output.print_string(key, quote);
+ }
+ }
+
+ DEFPRINT(AST_ObjectKeyVal, function(self, output) {
+ print_property_name(self.key, self.quote, output);
+ output.colon();
+ self.value.print(output);
+ });
+ AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, output) {
+ output.print(type);
+ output.space();
+ print_property_name(this.key.name, this.quote, output);
+ this.value._do_print(output, true);
+ });
+ DEFPRINT(AST_ObjectSetter, function(self, output) {
+ self._print_getter_setter("set", output);
+ });
+ DEFPRINT(AST_ObjectGetter, function(self, output) {
+ self._print_getter_setter("get", output);
+ });
+ DEFPRINT(AST_Symbol, function(self, output) {
+ var def = self.definition();
+ output.print_name(def && def.mangled_name || self.name);
+ });
+ DEFPRINT(AST_Hole, noop);
+ DEFPRINT(AST_This, function(self, output) {
+ output.print("this");
+ });
+ DEFPRINT(AST_Constant, function(self, output) {
+ output.print(self.value);
+ });
+ DEFPRINT(AST_String, function(self, output) {
+ output.print_string(self.value, self.quote);
+ });
+ DEFPRINT(AST_Number, function(self, output) {
+ if (use_asm && self.start && self.start.raw != null) {
+ output.print(self.start.raw);
+ } else {
+ output.print(make_num(self.value));
+ }
+ });
+
+ DEFPRINT(AST_RegExp, function(self, output) {
+ var regexp = self.value;
+ var str = regexp.toString();
+ var end = str.lastIndexOf("/");
+ if (regexp.raw_source) {
+ str = "/" + regexp.raw_source + str.slice(end);
+ } else if (end == 1) {
+ str = "/(?:)" + str.slice(end);
+ } else if (str.indexOf("/", 1) < end) {
+ str = "/" + str.slice(1, end).replace(/\\\\|[^/]?\//g, function(match) {
+ return match[0] == "\\" ? match : match.slice(0, -1) + "\\/";
+ }) + str.slice(end);
+ }
+ output.print(output.to_utf8(str).replace(/\\(?:\0(?![0-9])|[^\0])/g, function(match) {
+ switch (match[1]) {
+ case "\n": return "\\n";
+ case "\r": return "\\r";
+ case "\t": return "\t";
+ case "\b": return "\b";
+ case "\f": return "\f";
+ case "\0": return "\0";
+ case "\x0B": return "\v";
+ case "\u2028": return "\\u2028";
+ case "\u2029": return "\\u2029";
+ default: return match;
+ }
+ }).replace(/[\n\r\u2028\u2029]/g, function(c) {
+ switch (c) {
+ case "\n": return "\\n";
+ case "\r": return "\\r";
+ case "\u2028": return "\\u2028";
+ case "\u2029": return "\\u2029";
+ }
+ }));
+ var p = output.parent();
+ if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)
+ output.print(" ");
+ });
+
+ function force_statement(stat, output) {
+ if (output.option("braces")) {
+ make_block(stat, output);
+ } else {
+ if (!stat || stat instanceof AST_EmptyStatement)
+ output.force_semicolon();
+ else
+ stat.print(output);
+ }
+ }
+
+ // self should be AST_New. decide if we want to show parens or not.
+ function need_constructor_parens(self, output) {
+ // Always print parentheses with arguments
+ if (self.args.length > 0) return true;
+
+ return output.option("beautify");
+ }
+
+ function best_of(a) {
+ var best = a[0], len = best.length;
+ for (var i = 1; i < a.length; ++i) {
+ if (a[i].length < len) {
+ best = a[i];
+ len = best.length;
+ }
+ }
+ return best;
+ }
+
+ function make_num(num) {
+ var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e");
+ var candidates = [ str ];
+ if (Math.floor(num) === num) {
+ if (num < 0) {
+ candidates.push("-0x" + (-num).toString(16).toLowerCase());
+ } else {
+ candidates.push("0x" + num.toString(16).toLowerCase());
+ }
+ }
+ var match, len, digits;
+ if (match = /^\.0+/.exec(str)) {
+ len = match[0].length;
+ digits = str.slice(len);
+ candidates.push(digits + "e-" + (digits.length + len - 1));
+ } else if (match = /0+$/.exec(str)) {
+ len = match[0].length;
+ candidates.push(str.slice(0, -len) + "e" + len);
+ } else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) {
+ candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length));
+ }
+ return best_of(candidates);
+ }
+
+ function make_block(stmt, output) {
+ if (!stmt || stmt instanceof AST_EmptyStatement)
+ output.print("{}");
+ else if (stmt instanceof AST_BlockStatement)
+ stmt.print(output);
+ else output.with_block(function() {
+ output.indent();
+ stmt.print(output);
+ output.newline();
+ });
+ }
+
+ /* -----[ source map generators ]----- */
+
+ function DEFMAP(nodetype, generator) {
+ nodetype.forEach(function(nodetype) {
+ nodetype.DEFMETHOD("add_source_map", generator);
+ });
+ }
+
+ DEFMAP([
+ // We could easily add info for ALL nodes, but it seems to me that
+ // would be quite wasteful, hence this noop in the base class.
+ AST_Node,
+ // since the label symbol will mark it
+ AST_LabeledStatement,
+ AST_Toplevel,
+ ], noop);
+
+ // XXX: I'm not exactly sure if we need it for all of these nodes,
+ // or if we should add even more.
+ DEFMAP([
+ AST_Array,
+ AST_BlockStatement,
+ AST_Catch,
+ AST_Constant,
+ AST_Debugger,
+ AST_Definitions,
+ AST_Directive,
+ AST_Finally,
+ AST_Jump,
+ AST_Lambda,
+ AST_New,
+ AST_Object,
+ AST_StatementWithBody,
+ AST_Symbol,
+ AST_Switch,
+ AST_SwitchBranch,
+ AST_Try,
+ ], function(output) {
+ output.add_mapping(this.start);
+ });
+
+ DEFMAP([
+ AST_ObjectGetter,
+ AST_ObjectSetter,
+ ], function(output) {
+ output.add_mapping(this.start, this.key.name);
+ });
+
+ DEFMAP([ AST_ObjectProperty ], function(output) {
+ output.add_mapping(this.start, this.key);
+ });
+})();
generated by cgit v1.2.3 (git 2.25.1) at 2026-04-25 00:47:25 +0000