mirror of
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1957 lines
65 KiB
JavaScript
1957 lines
65 KiB
JavaScript
/***********************************************************************
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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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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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function 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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// 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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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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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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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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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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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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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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function has_nlb() {
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return /(^|\n) *$/.test(output);
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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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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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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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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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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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comments = comments.filter(comment_filter, node);
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var printed = false;
|
|
comments.forEach(function(comment, index) {
|
|
pad_comment(comment, index);
|
|
if (print_comment(comment)) printed = true;
|
|
});
|
|
if (printed) pad_comment(node.start, true);
|
|
|
|
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;
|
|
comments.filter(comment_filter, node).forEach(function(comment, index) {
|
|
pad_comment(comment, index || !tail);
|
|
print_comment(comment);
|
|
});
|
|
}
|
|
|
|
return {
|
|
get : get,
|
|
reset : reset,
|
|
indent : indent,
|
|
should_break : options.beautify && options.width ? function() {
|
|
return current_col >= options.width;
|
|
} : return_false,
|
|
has_parens : function() { return last.slice(-1) == "(" },
|
|
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(to_utf8(name.toString(), true)) },
|
|
print_string : options.inline_script ? function(str, quote) {
|
|
str = make_string(str, quote).replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2");
|
|
print(str.replace(/\x3c!--/g, "\\x3c!--").replace(/--\x3e/g, "--\\x3e"));
|
|
} : function(str, quote) {
|
|
print(make_string(str, quote));
|
|
},
|
|
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: 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);
|
|
});
|
|
})();
|