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1956 lines
65 KiB
1956 lines
65 KiB
/*********************************************************************** |
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A JavaScript tokenizer / parser / beautifier / compressor. |
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https://github.com/mishoo/UglifyJS |
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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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|
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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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|
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function is_some_comments(comment) { |
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// multiline comment |
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return comment.type == "comment2" && /@preserve|@license|@cc_on/i.test(comment.value); |
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} |
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function OutputStream(options) { |
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options = defaults(options, { |
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annotations : false, |
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ascii_only : false, |
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beautify : false, |
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braces : false, |
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comments : false, |
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extendscript : false, |
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galio : false, |
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ie : false, |
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indent_level : 4, |
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indent_start : 0, |
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inline_script : true, |
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keep_quoted_props: false, |
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max_line_len : false, |
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preamble : null, |
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preserve_line : false, |
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quote_keys : false, |
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quote_style : 0, |
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semicolons : true, |
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shebang : true, |
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source_map : null, |
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v8 : false, |
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webkit : false, |
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width : 80, |
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wrap_iife : false, |
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}, true); |
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|
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// Convert comment option to RegExp if necessary and set up comments filter |
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var comment_filter = return_false; // Default case, throw all comments away |
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if (options.comments) { |
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var comments = options.comments; |
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if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) { |
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var regex_pos = options.comments.lastIndexOf("/"); |
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comments = new RegExp( |
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options.comments.substr(1, regex_pos - 1), |
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options.comments.substr(regex_pos + 1) |
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); |
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} |
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if (comments instanceof RegExp) { |
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comment_filter = function(comment) { |
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return comment.type != "comment5" && comments.test(comment.value); |
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}; |
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} else if (typeof comments === "function") { |
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comment_filter = function(comment) { |
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return comment.type != "comment5" && comments(this, comment); |
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}; |
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} else if (comments === "some") { |
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comment_filter = is_some_comments; |
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} else { // NOTE includes "all" option |
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comment_filter = return_true; |
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} |
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} |
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function make_indent(value) { |
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if (typeof value == "number") return new Array(value + 1).join(" "); |
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if (!value) return ""; |
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if (!/^\s*$/.test(value)) throw new Error("unsupported indentation: " + JSON.stringify("" + value)); |
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return value; |
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} |
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|
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var current_col = 0; |
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var current_line = 1; |
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var current_indent = make_indent(options.indent_start); |
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var full_indent = make_indent(options.indent_level); |
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var half_indent = full_indent.length + 1 >> 1; |
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var last; |
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var line_end = 0; |
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var line_fixed = true; |
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var mappings = options.source_map && []; |
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var mapping_name; |
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var mapping_token; |
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var might_need_space; |
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var might_need_semicolon; |
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var need_newline_indented = false; |
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var need_space = false; |
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var output; |
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var stack; |
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var stored = ""; |
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|
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function reset() { |
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last = ""; |
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might_need_space = false; |
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might_need_semicolon = false; |
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stack = []; |
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var str = output; |
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output = ""; |
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return str; |
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} |
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reset(); |
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var to_utf8 = options.ascii_only ? function(str, identifier) { |
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if (identifier) str = str.replace(/[\ud800-\udbff][\udc00-\udfff]/g, function(ch) { |
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return "\\u{" + (ch.charCodeAt(0) - 0xd7c0 << 10 | ch.charCodeAt(1) - 0xdc00).toString(16) + "}"; |
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}); |
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return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) { |
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var code = ch.charCodeAt(0).toString(16); |
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if (code.length <= 2 && !identifier) { |
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while (code.length < 2) code = "0" + code; |
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return "\\x" + code; |
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} else { |
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while (code.length < 4) code = "0" + code; |
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return "\\u" + code; |
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} |
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}); |
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} : function(str) { |
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var s = ""; |
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for (var i = 0, j = 0; i < str.length; i++) { |
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var code = str.charCodeAt(i); |
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if (is_surrogate_pair_head(code)) { |
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if (is_surrogate_pair_tail(str.charCodeAt(i + 1))) { |
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i++; |
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continue; |
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} |
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} else if (!is_surrogate_pair_tail(code)) { |
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continue; |
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} |
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s += str.slice(j, i) + "\\u" + code.toString(16); |
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j = i + 1; |
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} |
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return j == 0 ? str : s + str.slice(j); |
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}; |
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function quote_single(str) { |
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return "'" + str.replace(/\x27/g, "\\'") + "'"; |
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} |
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function quote_double(str) { |
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return '"' + str.replace(/\x22/g, '\\"') + '"'; |
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} |
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var quote_string = [ |
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null, |
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quote_single, |
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quote_double, |
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function(str, quote) { |
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return quote == "'" ? quote_single(str) : quote_double(str); |
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}, |
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][options.quote_style] || function(str, quote, dq, sq) { |
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return dq > sq ? quote_single(str) : quote_double(str); |
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}; |
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function make_string(str, quote) { |
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var dq = 0, sq = 0; |
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str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, function(s, i) { |
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switch (s) { |
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case '"': ++dq; return '"'; |
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case "'": ++sq; return "'"; |
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case "\\": return "\\\\"; |
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case "\n": return "\\n"; |
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case "\r": return "\\r"; |
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case "\t": return "\\t"; |
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case "\b": return "\\b"; |
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case "\f": return "\\f"; |
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case "\x0B": return options.ie ? "\\x0B" : "\\v"; |
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case "\u2028": return "\\u2028"; |
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case "\u2029": return "\\u2029"; |
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case "\ufeff": return "\\ufeff"; |
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case "\0": |
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return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0"; |
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} |
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return s; |
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}); |
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return quote_string(to_utf8(str), quote, dq, sq); |
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} |
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/* -----[ beautification/minification ]----- */ |
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var adjust_mappings = mappings ? function(line, col) { |
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mappings.forEach(function(mapping) { |
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mapping.line += line; |
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mapping.col += col; |
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}); |
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} : noop; |
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var flush_mappings = mappings ? function() { |
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mappings.forEach(function(mapping) { |
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options.source_map.add( |
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mapping.token.file, |
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mapping.line, mapping.col, |
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mapping.token.line, mapping.token.col, |
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!mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name |
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); |
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}); |
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mappings = []; |
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} : noop; |
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function insert_newlines(count) { |
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stored += output.slice(0, line_end); |
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output = output.slice(line_end); |
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var new_col = output.length; |
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adjust_mappings(count, new_col - current_col); |
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current_line += count; |
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current_col = new_col; |
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while (count--) stored += "\n"; |
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} |
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var fix_line = options.max_line_len ? function(flush) { |
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if (line_fixed) { |
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if (current_col > options.max_line_len) { |
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AST_Node.warn("Output exceeds {max_line_len} characters", options); |
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} |
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return; |
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} |
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if (current_col > options.max_line_len) { |
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insert_newlines(1); |
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line_fixed = true; |
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} |
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if (line_fixed || flush) flush_mappings(); |
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} : noop; |
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var require_semicolon = makePredicate("( [ + * / - , ."); |
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function require_space(prev, ch, str) { |
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return is_identifier_char(prev) && (is_identifier_char(ch) || ch == "\\") |
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|| (ch == "/" && ch == prev) |
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|| ((ch == "+" || ch == "-") && ch == last) |
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|| last == "--" && ch == ">" |
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|| last == "!" && str == "--" |
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|| prev == "/" && (str == "in" || str == "instanceof"); |
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} |
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var print = options.beautify |
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|| options.comments |
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|| options.max_line_len |
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|| options.preserve_line |
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|| options.shebang |
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|| !options.semicolons |
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|| options.source_map |
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|| options.width ? function(str) { |
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var ch = str.charAt(0); |
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if (need_newline_indented && ch) { |
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need_newline_indented = false; |
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if (ch != "\n") { |
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print("\n"); |
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indent(); |
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} |
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} |
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if (need_space && ch) { |
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need_space = false; |
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if (!/[\s;})]/.test(ch)) { |
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space(); |
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} |
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} |
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var prev = last.slice(-1); |
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if (might_need_semicolon) { |
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might_need_semicolon = false; |
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if (prev == ":" && ch == "}" || prev != ";" && (!ch || ";}".indexOf(ch) < 0)) { |
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var need_semicolon = require_semicolon[ch]; |
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if (need_semicolon || options.semicolons) { |
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output += ";"; |
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current_col++; |
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if (!line_fixed) { |
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fix_line(); |
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if (line_fixed && !need_semicolon && output == ";") { |
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output = ""; |
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current_col = 0; |
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} |
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} |
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if (line_end == output.length - 1) line_end++; |
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} else { |
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fix_line(); |
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output += "\n"; |
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current_line++; |
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current_col = 0; |
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// reset the semicolon flag, since we didn't print one |
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// now and might still have to later |
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if (/^\s+$/.test(str)) might_need_semicolon = true; |
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} |
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if (!options.beautify) might_need_space = false; |
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} |
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} |
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if (might_need_space) { |
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if (require_space(prev, ch, str)) { |
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output += " "; |
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current_col++; |
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} |
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if (prev != "<" || str != "!") might_need_space = false; |
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} |
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|
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if (mapping_token) { |
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mappings.push({ |
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token: mapping_token, |
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name: mapping_name, |
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line: current_line, |
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col: current_col, |
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}); |
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mapping_token = false; |
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if (line_fixed) flush_mappings(); |
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} |
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output += str; |
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var a = str.split(/\r?\n/), n = a.length - 1; |
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current_line += n; |
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current_col += a[0].length; |
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if (n > 0) { |
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fix_line(); |
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current_col = a[n].length; |
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} |
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last = str; |
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} : function(str) { |
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var ch = str.charAt(0); |
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var prev = last.slice(-1); |
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if (might_need_semicolon) { |
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might_need_semicolon = false; |
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if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") { |
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output += ";"; |
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might_need_space = false; |
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} |
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} |
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if (might_need_space) { |
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if (require_space(prev, ch, str)) output += " "; |
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if (prev != "<" || str != "!") might_need_space = false; |
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} |
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output += str; |
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last = str; |
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}; |
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var space = options.beautify ? function() { |
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print(" "); |
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} : function() { |
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might_need_space = true; |
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}; |
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var indent = options.beautify ? function(half) { |
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if (need_newline_indented) print("\n"); |
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print(half ? current_indent.slice(0, -half_indent) : current_indent); |
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} : noop; |
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var with_indent = options.beautify ? function(cont) { |
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var save_indentation = current_indent; |
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current_indent += full_indent; |
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cont(); |
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current_indent = save_indentation; |
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} : function(cont) { cont() }; |
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|
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var may_add_newline = options.max_line_len || options.preserve_line ? function() { |
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fix_line(); |
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line_end = output.length; |
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line_fixed = false; |
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} : noop; |
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|
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var newline = options.beautify ? function() { |
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print("\n"); |
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line_end = output.length; |
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} : may_add_newline; |
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var semicolon = options.beautify ? function() { |
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print(";"); |
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} : function() { |
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might_need_semicolon = true; |
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}; |
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function force_semicolon() { |
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if (might_need_semicolon) print(";"); |
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print(";"); |
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} |
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function with_block(cont, end) { |
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print("{"); |
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newline(); |
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with_indent(cont); |
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add_mapping(end); |
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indent(); |
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print("}"); |
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} |
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function with_parens(cont) { |
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print("("); |
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may_add_newline(); |
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cont(); |
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may_add_newline(); |
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print(")"); |
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} |
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function with_square(cont) { |
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print("["); |
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may_add_newline(); |
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cont(); |
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may_add_newline(); |
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print("]"); |
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} |
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function comma() { |
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may_add_newline(); |
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print(","); |
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may_add_newline(); |
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space(); |
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} |
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function colon() { |
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print(":"); |
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space(); |
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} |
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var add_mapping = mappings ? function(token, name) { |
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mapping_token = token; |
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mapping_name = name; |
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} : noop; |
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|
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function get() { |
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if (!line_fixed) fix_line(true); |
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return stored + output; |
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} |
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|
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function has_nlb() { |
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return /(^|\n) *$/.test(output); |
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} |
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|
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function pad_comment(token, force) { |
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if (need_newline_indented) return; |
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if (token.nlb && (force || !has_nlb())) { |
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need_newline_indented = true; |
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} else if (force) { |
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need_space = true; |
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} |
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} |
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function print_comment(comment) { |
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var value = comment.value.replace(/[@#]__PURE__/g, " "); |
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if (/^\s*$/.test(value) && !/^\s*$/.test(comment.value)) return false; |
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if (/comment[134]/.test(comment.type)) { |
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print("//" + value); |
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need_newline_indented = true; |
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} else if (comment.type == "comment2") { |
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print("/*" + value + "*/"); |
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} |
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return true; |
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} |
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|
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function should_merge_comments(node, parent) { |
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if (parent instanceof AST_Binary) return parent.left === node; |
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if (parent.TYPE == "Call") return parent.expression === node; |
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if (parent instanceof AST_Conditional) return parent.condition === node; |
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if (parent instanceof AST_Dot) return parent.expression === node; |
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if (parent instanceof AST_Exit) return true; |
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if (parent instanceof AST_Sequence) return parent.expressions[0] === node; |
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if (parent instanceof AST_Sub) return parent.expression === node; |
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if (parent instanceof AST_UnaryPostfix) return true; |
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if (parent instanceof AST_Yield) return true; |
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} |
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|
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function prepend_comments(node) { |
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var self = this; |
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var scan; |
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if (node instanceof AST_Exit) { |
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scan = node.value; |
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} else if (node instanceof AST_Yield) { |
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scan = node.expression; |
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} |
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var comments = dump(node); |
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if (!comments) comments = []; |
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|
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if (scan) { |
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var tw = new TreeWalker(function(node) { |
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if (!should_merge_comments(node, tw.parent())) return true; |
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var before = dump(node); |
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if (before) comments = comments.concat(before); |
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}); |
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tw.push(node); |
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scan.walk(tw); |
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} |
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|
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if (current_line == 1 && current_col == 0) { |
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if (comments.length > 0 && options.shebang && comments[0].type == "comment5") { |
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print("#!" + comments.shift().value + "\n"); |
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indent(); |
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} |
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var preamble = options.preamble; |
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if (preamble) print(preamble.replace(/\r\n?|\u2028|\u2029|(^|\S)\s*$/g, "$1\n")); |
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} |
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|
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comments = comments.filter(comment_filter, node); |
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var printed = false; |
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comments.forEach(function(comment, index) { |
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pad_comment(comment, index); |
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if (print_comment(comment)) printed = true; |
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}); |
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if (printed) pad_comment(node.start, true); |
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|
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function dump(node) { |
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var token = node.start; |
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if (!token) { |
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if (!scan) return; |
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node.start = token = new AST_Token(); |
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} |
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var comments = token.comments_before; |
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if (!comments) { |
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if (!scan) return; |
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token.comments_before = comments = []; |
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} |
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if (comments._dumped === self) return; |
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comments._dumped = self; |
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return comments; |
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} |
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} |
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|
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function append_comments(node, tail) { |
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var self = this; |
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var token = node.end; |
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if (!token) return; |
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var comments = token[tail ? "comments_before" : "comments_after"]; |
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if (!comments || comments._dumped === self) return; |
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if (!(node instanceof AST_Statement || all(comments, function(c) { |
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return !/comment[134]/.test(c.type); |
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}))) return; |
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comments._dumped = self; |
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comments.filter(comment_filter, node).forEach(function(comment, index) { |
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pad_comment(comment, index || !tail); |
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print_comment(comment); |
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}); |
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} |
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|
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return { |
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get : get, |
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reset : reset, |
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indent : indent, |
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should_break : options.beautify && options.width ? function() { |
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return current_col >= options.width; |
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} : return_false, |
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has_parens : function() { return last.slice(-1) == "(" }, |
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newline : newline, |
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print : print, |
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space : space, |
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comma : comma, |
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colon : colon, |
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last : function() { return last }, |
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semicolon : semicolon, |
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force_semicolon : force_semicolon, |
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to_utf8 : to_utf8, |
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print_name : function(name) { print(to_utf8(name.toString(), true)) }, |
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print_string : options.inline_script ? function(str, quote) { |
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str = make_string(str, quote).replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2"); |
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print(str.replace(/\x3c!--/g, "\\x3c!--").replace(/--\x3e/g, "--\\x3e")); |
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} : function(str, quote) { |
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print(make_string(str, quote)); |
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}, |
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with_indent : with_indent, |
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with_block : with_block, |
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with_parens : with_parens, |
|
with_square : with_square, |
|
add_mapping : add_mapping, |
|
option : function(opt) { return options[opt] }, |
|
prepend_comments: options.comments || options.shebang ? prepend_comments : noop, |
|
append_comments : options.comments ? append_comments : noop, |
|
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; |
|
stream.push_node(self); |
|
if (force_parens || self.needs_parens(stream)) { |
|
stream.with_parens(doit); |
|
} else { |
|
doit(); |
|
} |
|
stream.pop_node(); |
|
|
|
function doit() { |
|
stream.prepend_comments(self); |
|
self.add_source_map(stream); |
|
self._codegen(stream); |
|
stream.append_comments(self); |
|
} |
|
}); |
|
var readonly = OutputStream({ |
|
inline_script: false, |
|
shebang: false, |
|
width: false, |
|
}); |
|
AST_Node.DEFMETHOD("print_to_string", function(options) { |
|
if (options) { |
|
var stream = OutputStream(options); |
|
this.print(stream); |
|
return stream.get(); |
|
} |
|
this.print(readonly); |
|
return readonly.reset(); |
|
}); |
|
|
|
/* -----[ PARENTHESES ]----- */ |
|
|
|
function PARENS(nodetype, func) { |
|
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. |
|
function needs_parens_function(output) { |
|
var p = output.parent(); |
|
if (!output.has_parens() && first_in_statement(output, false, true)) { |
|
// export default function() {} |
|
// export default (function foo() {}); |
|
// export default (function() {})(foo); |
|
// export default (function() {})`foo`; |
|
// export default (function() {}) ? foo : bar; |
|
return this.name || !(p instanceof AST_ExportDefault); |
|
} |
|
if (output.option("webkit") && p instanceof AST_PropAccess && p.expression === this) return true; |
|
if (output.option("wrap_iife") && p instanceof AST_Call && p.expression === this) return true; |
|
} |
|
PARENS(AST_AsyncFunction, needs_parens_function); |
|
PARENS(AST_AsyncGeneratorFunction, needs_parens_function); |
|
PARENS(AST_ClassExpression, needs_parens_function); |
|
PARENS(AST_Function, needs_parens_function); |
|
PARENS(AST_GeneratorFunction, needs_parens_function); |
|
|
|
// same goes for an object literal, because otherwise it would be |
|
// interpreted as a block of code. |
|
function needs_parens_obj(output) { |
|
return !output.has_parens() && first_in_statement(output, true); |
|
} |
|
PARENS(AST_Object, needs_parens_obj); |
|
|
|
function needs_parens_unary(output) { |
|
var p = output.parent(); |
|
// (-x) ** y |
|
if (p instanceof AST_Binary) return p.operator == "**" && p.left === this; |
|
// (await x)(y) |
|
// new (await x) |
|
if (p instanceof AST_Call) return p.expression === this; |
|
// class extends (x++) {} |
|
// class x extends (typeof y) {} |
|
if (p instanceof AST_Class) return true; |
|
// (x++)[y] |
|
// (typeof x).y |
|
// https://github.com/mishoo/UglifyJS/issues/115 |
|
if (p instanceof AST_PropAccess) return p.expression === this; |
|
// (~x)`foo` |
|
if (p instanceof AST_Template) return p.tag === this; |
|
} |
|
PARENS(AST_Await, needs_parens_unary); |
|
PARENS(AST_Unary, needs_parens_unary); |
|
|
|
PARENS(AST_Sequence, function(output) { |
|
var p = output.parent(); |
|
// [ 1, (2, 3), 4 ] ---> [ 1, 3, 4 ] |
|
return p instanceof AST_Array |
|
// () ---> (foo, bar) |
|
|| is_arrow(p) && p.value === this |
|
// await (foo, bar) |
|
|| p instanceof AST_Await |
|
// 1 + (2, 3) + 4 ---> 8 |
|
|| p instanceof AST_Binary |
|
// new (foo, bar) or foo(1, (2, 3), 4) |
|
|| p instanceof AST_Call |
|
// class extends (foo, bar) {} |
|
// class foo extends (bar, baz) {} |
|
|| p instanceof AST_Class |
|
// class { foo = (bar, baz) } |
|
// class { [(foo, bar)]() {} } |
|
|| p instanceof AST_ClassProperty |
|
// (false, true) ? (a = 10, b = 20) : (c = 30) |
|
// ---> 20 (side effect, set a := 10 and b := 20) |
|
|| p instanceof AST_Conditional |
|
// [ a = (1, 2) ] = [] ---> a == 2 |
|
|| p instanceof AST_DefaultValue |
|
// { [(1, 2)]: foo } = bar |
|
// { 1: (2, foo) } = bar |
|
|| p instanceof AST_DestructuredKeyVal |
|
// export default (foo, bar) |
|
|| p instanceof AST_ExportDefault |
|
// for (foo of (bar, baz)); |
|
|| p instanceof AST_ForOf |
|
// { [(1, 2)]: 3 }[2] ---> 3 |
|
// { foo: (1, 2) }.foo ---> 2 |
|
|| p instanceof AST_ObjectProperty |
|
// (1, {foo:2}).foo or (1, {foo:2})["foo"] ---> 2 |
|
|| p instanceof AST_PropAccess && p.expression === this |
|
// ...(foo, bar, baz) |
|
|| p instanceof AST_Spread |
|
// (foo, bar)`baz` |
|
|| p instanceof AST_Template && p.tag === this |
|
// !(foo, bar, baz) |
|
|| p instanceof AST_Unary |
|
// var a = (1, 2), b = a + a; ---> b == 4 |
|
|| p instanceof AST_VarDef |
|
// yield (foo, bar) |
|
|| p instanceof AST_Yield; |
|
}); |
|
|
|
PARENS(AST_Binary, function(output) { |
|
var p = output.parent(); |
|
// await (foo && bar) |
|
if (p instanceof AST_Await) return true; |
|
// this deals with precedence: |
|
// 3 * (2 + 1) |
|
// 3 - (2 - 1) |
|
// (1 ** 2) ** 3 |
|
if (p instanceof AST_Binary) { |
|
var po = p.operator, pp = PRECEDENCE[po]; |
|
var so = this.operator, sp = PRECEDENCE[so]; |
|
return pp > sp |
|
|| po == "??" && (so == "&&" || so == "||") |
|
|| (pp == sp && this === p[po == "**" ? "left" : "right"]); |
|
} |
|
// (foo && bar)() |
|
if (p instanceof AST_Call) return p.expression === this; |
|
// class extends (foo && bar) {} |
|
// class foo extends (bar || null) {} |
|
if (p instanceof AST_Class) return true; |
|
// (foo && bar)["prop"], (foo && bar).prop |
|
if (p instanceof AST_PropAccess) return p.expression === this; |
|
// (foo && bar)`` |
|
if (p instanceof AST_Template) return p.tag === this; |
|
// typeof (foo && bar) |
|
if (p instanceof AST_Unary) return true; |
|
}); |
|
|
|
function need_chain_parens(node, parent) { |
|
if (!node.terminal) return false; |
|
if (!(parent instanceof AST_Call || parent instanceof AST_PropAccess)) return false; |
|
return parent.expression === node; |
|
} |
|
|
|
PARENS(AST_PropAccess, function(output) { |
|
var node = this; |
|
var p = output.parent(); |
|
// i.e. new (foo().bar) |
|
// |
|
// 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. |
|
if (p instanceof AST_New && p.expression === node && root_expr(node).TYPE == "Call") return true; |
|
// (foo?.bar)() |
|
// (foo?.bar).baz |
|
// new (foo?.bar)() |
|
return need_chain_parens(node, p); |
|
}); |
|
|
|
PARENS(AST_Call, function(output) { |
|
var node = this; |
|
var p = output.parent(); |
|
if (p instanceof AST_New) return p.expression === node; |
|
// https://bugs.webkit.org/show_bug.cgi?id=123506 |
|
if (output.option("webkit") |
|
&& node.expression instanceof AST_Function |
|
&& p instanceof AST_PropAccess |
|
&& p.expression === node) { |
|
var g = output.parent(1); |
|
if (g instanceof AST_Assign && g.left === p) return true; |
|
} |
|
// (foo?.())() |
|
// (foo?.()).bar |
|
// new (foo?.())() |
|
return need_chain_parens(node, p); |
|
}); |
|
|
|
PARENS(AST_New, function(output) { |
|
if (need_constructor_parens(this, output)) return false; |
|
var p = output.parent(); |
|
// (new foo)(bar) |
|
if (p instanceof AST_Call) return p.expression === this; |
|
// (new Date).getTime(), (new Date)["getTime"]() |
|
if (p instanceof AST_PropAccess) return true; |
|
// (new foo)`bar` |
|
if (p instanceof AST_Template) return p.tag === this; |
|
}); |
|
|
|
PARENS(AST_Number, function(output) { |
|
if (!output.option("galio")) return false; |
|
// https://github.com/mishoo/UglifyJS/pull/1009 |
|
var p = output.parent(); |
|
return p instanceof AST_PropAccess && p.expression === this && /^0/.test(make_num(this.value)); |
|
}); |
|
|
|
function needs_parens_assign_cond(self, output) { |
|
var p = output.parent(); |
|
// await (a = foo) |
|
if (p instanceof AST_Await) return true; |
|
// 1 + (a = 2) + 3 → 6, side effect setting a = 2 |
|
if (p instanceof AST_Binary) return !(p instanceof AST_Assign); |
|
// (a = func)() —or— new (a = Object)() |
|
if (p instanceof AST_Call) return p.expression === self; |
|
// class extends (a = foo) {} |
|
// class foo extends (bar ? baz : moo) {} |
|
if (p instanceof AST_Class) return true; |
|
// (a = foo) ? bar : baz |
|
if (p instanceof AST_Conditional) return p.condition === self; |
|
// (a = foo)["prop"] —or— (a = foo).prop |
|
if (p instanceof AST_PropAccess) return p.expression === self; |
|
// (a = foo)`bar` |
|
if (p instanceof AST_Template) return p.tag === self; |
|
// !(a = false) → true |
|
if (p instanceof AST_Unary) return true; |
|
} |
|
PARENS(AST_Arrow, function(output) { |
|
return needs_parens_assign_cond(this, output); |
|
}); |
|
PARENS(AST_Assign, function(output) { |
|
if (needs_parens_assign_cond(this, output)) return true; |
|
// v8 parser bug ---> workaround |
|
// f([1], [a] = []) ---> f([1], ([a] = [])) |
|
if (output.option("v8")) return this.left instanceof AST_Destructured; |
|
// ({ p: a } = o); |
|
if (this.left instanceof AST_DestructuredObject) return needs_parens_obj(output); |
|
}); |
|
PARENS(AST_AsyncArrow, function(output) { |
|
return needs_parens_assign_cond(this, output); |
|
}); |
|
PARENS(AST_Conditional, function(output) { |
|
return needs_parens_assign_cond(this, output) |
|
// https://github.com/mishoo/UglifyJS/issues/1144 |
|
|| output.option("extendscript") && output.parent() instanceof AST_Conditional; |
|
}); |
|
PARENS(AST_Yield, function(output) { |
|
return needs_parens_assign_cond(this, output); |
|
}); |
|
|
|
/* -----[ PRINTERS ]----- */ |
|
|
|
DEFPRINT(AST_Directive, function(output) { |
|
var quote = this.quote; |
|
var value = this.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(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; |
|
} |
|
|
|
DEFPRINT(AST_Toplevel, function(output) { |
|
display_body(this.body, true, output, true); |
|
output.print(""); |
|
}); |
|
DEFPRINT(AST_LabeledStatement, function(output) { |
|
this.label.print(output); |
|
output.colon(); |
|
this.body.print(output); |
|
}); |
|
DEFPRINT(AST_SimpleStatement, function(output) { |
|
this.body.print(output); |
|
output.semicolon(); |
|
}); |
|
function print_braced_empty(self, output) { |
|
output.print("{"); |
|
output.with_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); |
|
}, self.end); |
|
} else print_braced_empty(self, output); |
|
} |
|
DEFPRINT(AST_BlockStatement, function(output) { |
|
print_braced(this, output); |
|
}); |
|
DEFPRINT(AST_EmptyStatement, function(output) { |
|
output.semicolon(); |
|
}); |
|
DEFPRINT(AST_Do, function(output) { |
|
var self = this; |
|
output.print("do"); |
|
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(output) { |
|
var self = this; |
|
output.print("while"); |
|
output.space(); |
|
output.with_parens(function() { |
|
self.condition.print(output); |
|
}); |
|
force_statement(self.body, output); |
|
}); |
|
DEFPRINT(AST_For, function(output) { |
|
var self = this; |
|
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_no_in(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); |
|
} |
|
}); |
|
force_statement(self.body, output); |
|
}); |
|
function print_for_enum(prefix, infix) { |
|
return function(output) { |
|
var self = this; |
|
output.print(prefix); |
|
output.space(); |
|
output.with_parens(function() { |
|
self.init.print(output); |
|
output.space(); |
|
output.print(infix); |
|
output.space(); |
|
self.object.print(output); |
|
}); |
|
force_statement(self.body, output); |
|
}; |
|
} |
|
DEFPRINT(AST_ForAwaitOf, print_for_enum("for await", "of")); |
|
DEFPRINT(AST_ForIn, print_for_enum("for", "in")); |
|
DEFPRINT(AST_ForOf, print_for_enum("for", "of")); |
|
DEFPRINT(AST_With, function(output) { |
|
var self = this; |
|
output.print("with"); |
|
output.space(); |
|
output.with_parens(function() { |
|
self.expression.print(output); |
|
}); |
|
force_statement(self.body, output); |
|
}); |
|
DEFPRINT(AST_ExportDeclaration, function(output) { |
|
output.print("export"); |
|
output.space(); |
|
this.body.print(output); |
|
}); |
|
DEFPRINT(AST_ExportDefault, function(output) { |
|
output.print("export"); |
|
output.space(); |
|
output.print("default"); |
|
output.space(); |
|
var body = this.body; |
|
body.print(output); |
|
if (body instanceof AST_ClassExpression) { |
|
if (!body.name) return; |
|
} |
|
if (body instanceof AST_DefClass) return; |
|
if (body instanceof AST_LambdaDefinition) return; |
|
if (body instanceof AST_LambdaExpression) { |
|
if (!body.name && !is_arrow(body)) return; |
|
} |
|
output.semicolon(); |
|
}); |
|
function print_alias(alias, output) { |
|
var value = alias.value; |
|
if (value == "*" || is_identifier_string(value)) { |
|
output.print_name(value); |
|
} else { |
|
output.print_string(value, alias.quote); |
|
} |
|
} |
|
DEFPRINT(AST_ExportForeign, function(output) { |
|
var self = this; |
|
output.print("export"); |
|
output.space(); |
|
var len = self.keys.length; |
|
if (len == 0) { |
|
print_braced_empty(self, output); |
|
} else if (self.keys[0].value == "*") { |
|
print_entry(0); |
|
} else output.with_block(function() { |
|
output.indent(); |
|
print_entry(0); |
|
for (var i = 1; i < len; i++) { |
|
output.print(","); |
|
output.newline(); |
|
output.indent(); |
|
print_entry(i); |
|
} |
|
output.newline(); |
|
}, self.end); |
|
output.space(); |
|
output.print("from"); |
|
output.space(); |
|
self.path.print(output); |
|
output.semicolon(); |
|
|
|
function print_entry(index) { |
|
var alias = self.aliases[index]; |
|
var key = self.keys[index]; |
|
print_alias(key, output); |
|
if (alias.value != key.value) { |
|
output.space(); |
|
output.print("as"); |
|
output.space(); |
|
print_alias(alias, output); |
|
} |
|
} |
|
}); |
|
DEFPRINT(AST_ExportReferences, function(output) { |
|
var self = this; |
|
output.print("export"); |
|
output.space(); |
|
print_properties(self, output); |
|
output.semicolon(); |
|
}); |
|
DEFPRINT(AST_Import, function(output) { |
|
var self = this; |
|
output.print("import"); |
|
output.space(); |
|
if (self.default) self.default.print(output); |
|
if (self.all) { |
|
if (self.default) output.comma(); |
|
self.all.print(output); |
|
} |
|
if (self.properties) { |
|
if (self.default) output.comma(); |
|
print_properties(self, output); |
|
} |
|
if (self.all || self.default || self.properties) { |
|
output.space(); |
|
output.print("from"); |
|
output.space(); |
|
} |
|
self.path.print(output); |
|
output.semicolon(); |
|
}); |
|
|
|
/* -----[ functions ]----- */ |
|
function print_funargs(self, output) { |
|
output.with_parens(function() { |
|
self.argnames.forEach(function(arg, i) { |
|
if (i) output.comma(); |
|
arg.print(output); |
|
}); |
|
if (self.rest) { |
|
if (self.argnames.length) output.comma(); |
|
output.print("..."); |
|
self.rest.print(output); |
|
} |
|
}); |
|
} |
|
function print_arrow(self, output) { |
|
var argname = self.argnames.length == 1 && !self.rest && self.argnames[0]; |
|
if (argname instanceof AST_SymbolFunarg && argname.name != "yield") { |
|
argname.print(output); |
|
} else { |
|
print_funargs(self, output); |
|
} |
|
output.space(); |
|
output.print("=>"); |
|
output.space(); |
|
if (self.value) { |
|
self.value.print(output); |
|
} else { |
|
print_braced(self, output, true); |
|
} |
|
} |
|
DEFPRINT(AST_Arrow, function(output) { |
|
print_arrow(this, output); |
|
}); |
|
DEFPRINT(AST_AsyncArrow, function(output) { |
|
output.print("async"); |
|
output.space(); |
|
print_arrow(this, output); |
|
}); |
|
function print_lambda(self, output) { |
|
if (self.name) { |
|
output.space(); |
|
self.name.print(output); |
|
} |
|
print_funargs(self, output); |
|
output.space(); |
|
print_braced(self, output, true); |
|
} |
|
DEFPRINT(AST_Lambda, function(output) { |
|
output.print("function"); |
|
print_lambda(this, output); |
|
}); |
|
function print_async(output) { |
|
output.print("async"); |
|
output.space(); |
|
output.print("function"); |
|
print_lambda(this, output); |
|
} |
|
DEFPRINT(AST_AsyncDefun, print_async); |
|
DEFPRINT(AST_AsyncFunction, print_async); |
|
function print_async_generator(output) { |
|
output.print("async"); |
|
output.space(); |
|
output.print("function*"); |
|
print_lambda(this, output); |
|
} |
|
DEFPRINT(AST_AsyncGeneratorDefun, print_async_generator); |
|
DEFPRINT(AST_AsyncGeneratorFunction, print_async_generator); |
|
function print_generator(output) { |
|
output.print("function*"); |
|
print_lambda(this, output); |
|
} |
|
DEFPRINT(AST_GeneratorDefun, print_generator); |
|
DEFPRINT(AST_GeneratorFunction, print_generator); |
|
|
|
/* -----[ classes ]----- */ |
|
DEFPRINT(AST_Class, function(output) { |
|
var self = this; |
|
output.print("class"); |
|
if (self.name) { |
|
output.space(); |
|
self.name.print(output); |
|
} |
|
if (self.extends) { |
|
output.space(); |
|
output.print("extends"); |
|
output.space(); |
|
self.extends.print(output); |
|
} |
|
output.space(); |
|
print_properties(self, output, true); |
|
}); |
|
DEFPRINT(AST_ClassField, function(output) { |
|
var self = this; |
|
if (self.static) { |
|
output.print("static"); |
|
output.space(); |
|
} |
|
print_property_key(self, output); |
|
if (self.value) { |
|
output.space(); |
|
output.print("="); |
|
output.space(); |
|
self.value.print(output); |
|
} |
|
output.semicolon(); |
|
}); |
|
DEFPRINT(AST_ClassGetter, print_accessor("get")); |
|
DEFPRINT(AST_ClassSetter, print_accessor("set")); |
|
function print_method(self, output) { |
|
var fn = self.value; |
|
if (is_async(fn)) { |
|
output.print("async"); |
|
output.space(); |
|
} |
|
if (is_generator(fn)) output.print("*"); |
|
print_property_key(self, output); |
|
print_lambda(self.value, output); |
|
} |
|
DEFPRINT(AST_ClassMethod, function(output) { |
|
var self = this; |
|
if (self.static) { |
|
output.print("static"); |
|
output.space(); |
|
} |
|
print_method(self, output); |
|
}); |
|
DEFPRINT(AST_ClassInit, function(output) { |
|
output.print("static"); |
|
output.space(); |
|
print_braced(this.value, output); |
|
}); |
|
|
|
/* -----[ jumps ]----- */ |
|
function print_jump(kind, prop) { |
|
return function(output) { |
|
output.print(kind); |
|
var target = this[prop]; |
|
if (target) { |
|
output.space(); |
|
target.print(output); |
|
} |
|
output.semicolon(); |
|
}; |
|
} |
|
DEFPRINT(AST_Return, print_jump("return", "value")); |
|
DEFPRINT(AST_Throw, print_jump("throw", "value")); |
|
DEFPRINT(AST_Break, print_jump("break", "label")); |
|
DEFPRINT(AST_Continue, print_jump("continue", "label")); |
|
|
|
/* -----[ if ]----- */ |
|
function make_then(self, output) { |
|
var b = self.body; |
|
if (output.option("braces") && !(b instanceof AST_Const || b instanceof AST_Let) |
|
|| output.option("ie") && 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(output) { |
|
var self = this; |
|
output.print("if"); |
|
output.space(); |
|
output.with_parens(function() { |
|
self.condition.print(output); |
|
}); |
|
if (self.alternative) { |
|
make_then(self, output); |
|
output.space(); |
|
output.print("else"); |
|
if (self.alternative instanceof AST_If) { |
|
output.space(); |
|
self.alternative.print(output); |
|
} else { |
|
force_statement(self.alternative, output); |
|
} |
|
} else { |
|
force_statement(self.body, output); |
|
} |
|
}); |
|
|
|
/* -----[ switch ]----- */ |
|
DEFPRINT(AST_Switch, function(output) { |
|
var self = this; |
|
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(); |
|
}); |
|
}, self.end); |
|
}); |
|
function print_branch_body(self, output) { |
|
output.newline(); |
|
self.body.forEach(function(stmt) { |
|
output.indent(); |
|
stmt.print(output); |
|
output.newline(); |
|
}); |
|
} |
|
DEFPRINT(AST_Default, function(output) { |
|
output.print("default:"); |
|
print_branch_body(this, output); |
|
}); |
|
DEFPRINT(AST_Case, function(output) { |
|
var self = this; |
|
output.print("case"); |
|
output.space(); |
|
self.expression.print(output); |
|
output.print(":"); |
|
print_branch_body(self, output); |
|
}); |
|
|
|
/* -----[ exceptions ]----- */ |
|
DEFPRINT(AST_Try, function(output) { |
|
var self = this; |
|
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(output) { |
|
var self = this; |
|
output.print("catch"); |
|
if (self.argname) { |
|
output.space(); |
|
output.with_parens(function() { |
|
self.argname.print(output); |
|
}); |
|
} |
|
output.space(); |
|
print_braced(self, output); |
|
}); |
|
DEFPRINT(AST_Finally, function(output) { |
|
output.print("finally"); |
|
output.space(); |
|
print_braced(this, output); |
|
}); |
|
|
|
function print_definitions(type) { |
|
return function(output) { |
|
var self = this; |
|
output.print(type); |
|
output.space(); |
|
self.definitions.forEach(function(def, i) { |
|
if (i) output.comma(); |
|
def.print(output); |
|
}); |
|
var p = output.parent(); |
|
if (!(p instanceof AST_IterationStatement && p.init === self)) output.semicolon(); |
|
}; |
|
} |
|
DEFPRINT(AST_Const, print_definitions("const")); |
|
DEFPRINT(AST_Let, print_definitions("let")); |
|
DEFPRINT(AST_Var, print_definitions("var")); |
|
|
|
function parenthesize_for_no_in(node, output, no_in) { |
|
var parens = false; |
|
// need to take some precautions here: |
|
// https://github.com/mishoo/UglifyJS/issues/60 |
|
if (no_in) node.walk(new TreeWalker(function(node) { |
|
if (parens) return true; |
|
if (node instanceof AST_Binary && node.operator == "in") return parens = true; |
|
if (node instanceof AST_Scope && !(is_arrow(node) && node.value)) return true; |
|
})); |
|
node.print(output, parens); |
|
} |
|
|
|
DEFPRINT(AST_VarDef, function(output) { |
|
var self = this; |
|
self.name.print(output); |
|
if (self.value) { |
|
output.space(); |
|
output.print("="); |
|
output.space(); |
|
var p = output.parent(1); |
|
var no_in = p instanceof AST_For || p instanceof AST_ForEnumeration; |
|
parenthesize_for_no_in(self.value, output, no_in); |
|
} |
|
}); |
|
|
|
DEFPRINT(AST_DefaultValue, function(output) { |
|
var self = this; |
|
self.name.print(output); |
|
output.space(); |
|
output.print("="); |
|
output.space(); |
|
self.value.print(output); |
|
}); |
|
|
|
/* -----[ other expressions ]----- */ |
|
function print_annotation(self, output) { |
|
if (!output.option("annotations")) return; |
|
if (!self.pure) return; |
|
var level = 0, parent = self, node; |
|
do { |
|
node = parent; |
|
parent = output.parent(level++); |
|
if (parent instanceof AST_Call && parent.expression === node) return; |
|
} while (parent instanceof AST_PropAccess && parent.expression === node); |
|
output.print("/*@__PURE__*/"); |
|
} |
|
function print_call_args(self, output) { |
|
output.with_parens(function() { |
|
self.args.forEach(function(expr, i) { |
|
if (i) output.comma(); |
|
expr.print(output); |
|
}); |
|
output.add_mapping(self.end); |
|
}); |
|
} |
|
DEFPRINT(AST_Call, function(output) { |
|
var self = this; |
|
print_annotation(self, output); |
|
self.expression.print(output); |
|
if (self.optional) output.print("?."); |
|
print_call_args(self, output); |
|
}); |
|
DEFPRINT(AST_New, function(output) { |
|
var self = this; |
|
print_annotation(self, output); |
|
output.print("new"); |
|
output.space(); |
|
self.expression.print(output); |
|
if (need_constructor_parens(self, output)) print_call_args(self, output); |
|
}); |
|
DEFPRINT(AST_Sequence, function(output) { |
|
this.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(output) { |
|
var self = this; |
|
var expr = self.expression; |
|
expr.print(output); |
|
var prop = self.property; |
|
if (output.option("ie") && RESERVED_WORDS[prop] || self.quoted && output.option("keep_quoted_props")) { |
|
if (self.optional) output.print("?."); |
|
output.with_square(function() { |
|
output.add_mapping(self.end); |
|
output.print_string(prop); |
|
}); |
|
} else { |
|
if (expr instanceof AST_Number && !/[ex.)]/i.test(output.last())) output.print("."); |
|
output.print(self.optional ? "?." : "."); |
|
// the name after dot would be mapped about here. |
|
output.add_mapping(self.end); |
|
output.print_name(prop); |
|
} |
|
}); |
|
DEFPRINT(AST_Sub, function(output) { |
|
var self = this; |
|
self.expression.print(output); |
|
if (self.optional) output.print("?."); |
|
output.with_square(function() { |
|
self.property.print(output); |
|
}); |
|
}); |
|
DEFPRINT(AST_Spread, function(output) { |
|
output.print("..."); |
|
this.expression.print(output); |
|
}); |
|
DEFPRINT(AST_UnaryPrefix, function(output) { |
|
var op = this.operator; |
|
var exp = this.expression; |
|
output.print(op); |
|
if (/^[a-z]/i.test(op) |
|
|| (/[+-]$/.test(op) |
|
&& exp instanceof AST_UnaryPrefix |
|
&& /^[+-]/.test(exp.operator))) { |
|
output.space(); |
|
} |
|
exp.print(output); |
|
}); |
|
DEFPRINT(AST_UnaryPostfix, function(output) { |
|
var self = this; |
|
self.expression.print(output); |
|
output.add_mapping(self.end); |
|
output.print(self.operator); |
|
}); |
|
DEFPRINT(AST_Binary, function(output) { |
|
var self = this; |
|
self.left.print(output); |
|
output.space(); |
|
output.print(self.operator); |
|
output.space(); |
|
self.right.print(output); |
|
}); |
|
DEFPRINT(AST_Conditional, function(output) { |
|
var self = this; |
|
self.condition.print(output); |
|
output.space(); |
|
output.print("?"); |
|
output.space(); |
|
self.consequent.print(output); |
|
output.space(); |
|
output.colon(); |
|
self.alternative.print(output); |
|
}); |
|
DEFPRINT(AST_Await, function(output) { |
|
output.print("await"); |
|
output.space(); |
|
this.expression.print(output); |
|
}); |
|
DEFPRINT(AST_Yield, function(output) { |
|
output.print(this.nested ? "yield*" : "yield"); |
|
if (this.expression) { |
|
output.space(); |
|
this.expression.print(output); |
|
} |
|
}); |
|
|
|
/* -----[ literals ]----- */ |
|
DEFPRINT(AST_Array, function(output) { |
|
var a = this.elements, len = a.length; |
|
output.with_square(len > 0 ? function() { |
|
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(); |
|
}); |
|
output.space(); |
|
} : noop); |
|
}); |
|
DEFPRINT(AST_DestructuredArray, function(output) { |
|
var a = this.elements, len = a.length, rest = this.rest; |
|
output.with_square(len || rest ? function() { |
|
output.space(); |
|
a.forEach(function(exp, i) { |
|
if (i) output.comma(); |
|
exp.print(output); |
|
}); |
|
if (rest) { |
|
if (len) output.comma(); |
|
output.print("..."); |
|
rest.print(output); |
|
} else if (a[len - 1] instanceof AST_Hole) { |
|
// 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. |
|
output.comma(); |
|
} |
|
output.space(); |
|
} : noop); |
|
}); |
|
DEFPRINT(AST_DestructuredKeyVal, function(output) { |
|
var self = this; |
|
var key = print_property_key(self, output); |
|
var value = self.value; |
|
if (key) { |
|
if (value instanceof AST_DefaultValue) { |
|
if (value.name instanceof AST_Symbol && key == get_symbol_name(value.name)) { |
|
output.space(); |
|
output.print("="); |
|
output.space(); |
|
value.value.print(output); |
|
return; |
|
} |
|
} else if (value instanceof AST_Symbol) { |
|
if (key == get_symbol_name(value)) return; |
|
} |
|
} |
|
output.colon(); |
|
value.print(output); |
|
}); |
|
DEFPRINT(AST_DestructuredObject, function(output) { |
|
var self = this; |
|
var props = self.properties, len = props.length, rest = self.rest; |
|
if (len || rest) output.with_block(function() { |
|
props.forEach(function(prop, i) { |
|
if (i) { |
|
output.print(","); |
|
output.newline(); |
|
} |
|
output.indent(); |
|
prop.print(output); |
|
}); |
|
if (rest) { |
|
if (len) { |
|
output.print(","); |
|
output.newline(); |
|
} |
|
output.indent(); |
|
output.print("..."); |
|
rest.print(output); |
|
} |
|
output.newline(); |
|
}, self.end); |
|
else print_braced_empty(self, output); |
|
}); |
|
function print_properties(self, output, no_comma) { |
|
var props = self.properties; |
|
if (props.length > 0) output.with_block(function() { |
|
props.forEach(function(prop, i) { |
|
if (i) { |
|
if (!no_comma) output.print(","); |
|
output.newline(); |
|
} |
|
output.indent(); |
|
prop.print(output); |
|
}); |
|
output.newline(); |
|
}, self.end); |
|
else print_braced_empty(self, output); |
|
} |
|
DEFPRINT(AST_Object, function(output) { |
|
print_properties(this, output); |
|
}); |
|
|
|
function print_property_key(self, output) { |
|
var key = self.key; |
|
if (key instanceof AST_Node) return output.with_square(function() { |
|
key.print(output); |
|
}); |
|
var quote = self.start && self.start.quote; |
|
if (output.option("quote_keys") || quote && output.option("keep_quoted_props")) { |
|
output.print_string(key, quote); |
|
} else if ("" + +key == key && key >= 0) { |
|
output.print(make_num(key)); |
|
} else if (self.private) { |
|
output.print_name(key); |
|
} else if (RESERVED_WORDS[key] ? !output.option("ie") : is_identifier_string(key)) { |
|
output.print_name(key); |
|
return key; |
|
} else { |
|
output.print_string(key, quote); |
|
} |
|
} |
|
DEFPRINT(AST_ObjectKeyVal, function(output) { |
|
var self = this; |
|
print_property_key(self, output); |
|
output.colon(); |
|
self.value.print(output); |
|
}); |
|
DEFPRINT(AST_ObjectMethod, function(output) { |
|
print_method(this, output); |
|
}); |
|
function print_accessor(type) { |
|
return function(output) { |
|
var self = this; |
|
if (self.static) { |
|
output.print("static"); |
|
output.space(); |
|
} |
|
output.print(type); |
|
output.space(); |
|
print_property_key(self, output); |
|
print_lambda(self.value, output); |
|
}; |
|
} |
|
DEFPRINT(AST_ObjectGetter, print_accessor("get")); |
|
DEFPRINT(AST_ObjectSetter, print_accessor("set")); |
|
function get_symbol_name(sym) { |
|
var def = sym.definition(); |
|
return def && def.mangled_name || sym.name; |
|
} |
|
DEFPRINT(AST_Symbol, function(output) { |
|
output.print_name(get_symbol_name(this)); |
|
}); |
|
DEFPRINT(AST_SymbolExport, function(output) { |
|
var self = this; |
|
var name = get_symbol_name(self); |
|
output.print_name(name); |
|
var alias = self.alias; |
|
if (alias.value != name) { |
|
output.space(); |
|
output.print("as"); |
|
output.space(); |
|
print_alias(alias, output); |
|
} |
|
}); |
|
DEFPRINT(AST_SymbolImport, function(output) { |
|
var self = this; |
|
var name = get_symbol_name(self); |
|
var key = self.key; |
|
if (key.value && key.value != name) { |
|
print_alias(key, output); |
|
output.space(); |
|
output.print("as"); |
|
output.space(); |
|
} |
|
output.print_name(name); |
|
}); |
|
DEFPRINT(AST_Hole, noop); |
|
DEFPRINT(AST_Template, function(output) { |
|
var self = this; |
|
if (self.tag) self.tag.print(output); |
|
output.print("`"); |
|
for (var i = 0; i < self.expressions.length; i++) { |
|
output.print(self.strings[i]); |
|
output.print("${"); |
|
self.expressions[i].print(output); |
|
output.print("}"); |
|
} |
|
output.print(self.strings[i]); |
|
output.print("`"); |
|
}); |
|
DEFPRINT(AST_Constant, function(output) { |
|
output.print("" + this.value); |
|
}); |
|
DEFPRINT(AST_String, function(output) { |
|
output.print_string(this.value, this.quote); |
|
}); |
|
DEFPRINT(AST_Number, function(output) { |
|
var start = this.start; |
|
if (use_asm && start && start.raw != null) { |
|
output.print(start.raw); |
|
} else { |
|
output.print(make_num(this.value)); |
|
} |
|
}); |
|
|
|
DEFPRINT(AST_RegExp, function(output) { |
|
var regexp = this.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"; |
|
} |
|
})); |
|
}); |
|
|
|
function force_statement(stat, output) { |
|
if (output.option("braces") && !(stat instanceof AST_Const || stat instanceof AST_Let)) { |
|
make_block(stat, output); |
|
} else if (stat instanceof AST_EmptyStatement) { |
|
output.force_semicolon(); |
|
} else { |
|
output.space(); |
|
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]0+$/.exec(str)) { |
|
len = match[0].length - 1; |
|
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) { |
|
output.space(); |
|
if (stmt instanceof AST_EmptyStatement) { |
|
print_braced_empty(stmt, output); |
|
} else if (stmt instanceof AST_BlockStatement) { |
|
stmt.print(output); |
|
} else output.with_block(function() { |
|
output.indent(); |
|
stmt.print(output); |
|
output.newline(); |
|
}, stmt.end); |
|
} |
|
|
|
/* -----[ 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, |
|
], 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_Await, |
|
AST_BlockStatement, |
|
AST_Catch, |
|
AST_Constant, |
|
AST_Debugger, |
|
AST_Definitions, |
|
AST_Destructured, |
|
AST_Directive, |
|
AST_Finally, |
|
AST_Jump, |
|
AST_Lambda, |
|
AST_New, |
|
AST_Object, |
|
AST_Spread, |
|
AST_StatementWithBody, |
|
AST_Symbol, |
|
AST_Switch, |
|
AST_SwitchBranch, |
|
AST_Try, |
|
AST_UnaryPrefix, |
|
AST_Yield, |
|
], function(output) { |
|
output.add_mapping(this.start); |
|
}); |
|
|
|
DEFMAP([ |
|
AST_ClassProperty, |
|
AST_DestructuredKeyVal, |
|
AST_ObjectProperty, |
|
], function(output) { |
|
if (typeof this.key == "string") output.add_mapping(this.start, this.key); |
|
}); |
|
})();
|
|
|