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Diffstat (limited to 'node_modules/uglify-js/lib/output.js')
| -rw-r--r-- | node_modules/uglify-js/lib/output.js | 1513 |
1 files changed, 0 insertions, 1513 deletions
diff --git a/node_modules/uglify-js/lib/output.js b/node_modules/uglify-js/lib/output.js deleted file mode 100644 index 7f7e74df5..000000000 --- a/node_modules/uglify-js/lib/output.js +++ /dev/null @@ -1,1513 +0,0 @@ -/*********************************************************************** - - A JavaScript tokenizer / parser / beautifier / compressor. - https://github.com/mishoo/UglifyJS2 - - -------------------------------- (C) --------------------------------- - - Author: Mihai Bazon - <mihai.bazon@gmail.com> - http://mihai.bazon.net/blog - - Distributed under the BSD license: - - Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com> - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - * Redistributions of source code must retain the above - copyright notice, this list of conditions and the following - disclaimer. - - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following - disclaimer in the documentation and/or other materials - provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY - EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, - OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR - TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF - THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - SUCH DAMAGE. - - ***********************************************************************/ - -"use strict"; - -var EXPECT_DIRECTIVE = /^$|[;{][\s\n]*$/; - -function is_some_comments(comment) { - // multiline comment - return comment.type == "comment2" && /@preserve|@license|@cc_on/i.test(comment.value); -} - -function OutputStream(options) { - - var readonly = !options; - options = defaults(options, { - ascii_only : false, - beautify : false, - braces : false, - comments : false, - ie8 : false, - indent_level : 4, - indent_start : 0, - inline_script : true, - keep_quoted_props: false, - max_line_len : false, - preamble : null, - preserve_line : false, - quote_keys : false, - quote_style : 0, - semicolons : true, - shebang : true, - source_map : null, - webkit : false, - width : 80, - wrap_iife : false, - }, true); - - // Convert comment option to RegExp if neccessary and set up comments filter - var comment_filter = return_false; // Default case, throw all comments away - if (options.comments) { - var comments = options.comments; - if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) { - var regex_pos = options.comments.lastIndexOf("/"); - comments = new RegExp( - options.comments.substr(1, regex_pos - 1), - options.comments.substr(regex_pos + 1) - ); - } - if (comments instanceof RegExp) { - comment_filter = function(comment) { - return comment.type != "comment5" && comments.test(comment.value); - }; - } - else if (typeof comments === "function") { - comment_filter = function(comment) { - return comment.type != "comment5" && comments(this, comment); - }; - } - else if (comments === "some") { - comment_filter = is_some_comments; - } else { // NOTE includes "all" option - comment_filter = return_true; - } - } - - var indentation = 0; - var current_col = 0; - var current_line = 1; - var current_pos = 0; - var OUTPUT = ""; - - var to_utf8 = options.ascii_only ? function(str, identifier) { - return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) { - var code = ch.charCodeAt(0).toString(16); - if (code.length <= 2 && !identifier) { - while (code.length < 2) code = "0" + code; - return "\\x" + code; - } else { - while (code.length < 4) code = "0" + code; - return "\\u" + code; - } - }); - } : function(str) { - var s = ""; - for (var i = 0, len = str.length; i < len; i++) { - if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1]) - || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) { - s += "\\u" + str.charCodeAt(i).toString(16); - } else { - s += str[i]; - } - } - return s; - }; - - function make_string(str, quote) { - var dq = 0, sq = 0; - str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, - function(s, i) { - switch (s) { - case '"': ++dq; return '"'; - case "'": ++sq; return "'"; - case "\\": return "\\\\"; - case "\n": return "\\n"; - case "\r": return "\\r"; - case "\t": return "\\t"; - case "\b": return "\\b"; - case "\f": return "\\f"; - case "\x0B": return options.ie8 ? "\\x0B" : "\\v"; - case "\u2028": return "\\u2028"; - case "\u2029": return "\\u2029"; - case "\ufeff": return "\\ufeff"; - case "\0": - return /[0-9]/.test(str.charAt(i+1)) ? "\\x00" : "\\0"; - } - return s; - }); - function quote_single() { - return "'" + str.replace(/\x27/g, "\\'") + "'"; - } - function quote_double() { - return '"' + str.replace(/\x22/g, '\\"') + '"'; - } - str = to_utf8(str); - switch (options.quote_style) { - case 1: - return quote_single(); - case 2: - return quote_double(); - case 3: - return quote == "'" ? quote_single() : quote_double(); - default: - return dq > sq ? quote_single() : quote_double(); - } - } - - function encode_string(str, quote) { - var ret = make_string(str, quote); - if (options.inline_script) { - ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2"); - ret = ret.replace(/\x3c!--/g, "\\x3c!--"); - ret = ret.replace(/--\x3e/g, "--\\x3e"); - } - return ret; - } - - function make_name(name) { - name = name.toString(); - name = to_utf8(name, true); - return name; - } - - function make_indent(back) { - return repeat_string(" ", options.indent_start + indentation - back * options.indent_level); - } - - /* -----[ beautification/minification ]----- */ - - var has_parens = false; - var line_end = 0; - var line_fixed = true; - var might_need_space = false; - var might_need_semicolon = false; - var need_newline_indented = false; - var need_space = false; - var newline_insert = -1; - var last = ""; - var mapping_token, mapping_name, mappings = options.source_map && []; - - var adjust_mappings = mappings ? function(line, col) { - mappings.forEach(function(mapping) { - mapping.line += line; - mapping.col += col; - }); - } : noop; - - var flush_mappings = mappings ? function() { - mappings.forEach(function(mapping) { - try { - options.source_map.add( - mapping.token.file, - mapping.line, mapping.col, - mapping.token.line, mapping.token.col, - !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name - ); - } catch(ex) { - AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", { - file: mapping.token.file, - line: mapping.token.line, - col: mapping.token.col, - cline: mapping.line, - ccol: mapping.col, - name: mapping.name || "" - }) - } - }); - mappings = []; - } : noop; - - function insert_newlines(count) { - var index = OUTPUT.lastIndexOf("\n"); - if (line_end < index) line_end = index; - var left = OUTPUT.slice(0, line_end); - var right = OUTPUT.slice(line_end); - adjust_mappings(count, right.length - current_col); - current_line += count; - current_pos += count; - current_col = right.length; - OUTPUT = left; - while (count--) OUTPUT += "\n"; - OUTPUT += right; - } - - var fix_line = options.max_line_len ? function() { - if (line_fixed) { - if (current_col > options.max_line_len) { - AST_Node.warn("Output exceeds {max_line_len} characters", options); - } - return; - } - if (current_col > options.max_line_len) insert_newlines(1); - line_fixed = true; - flush_mappings(); - } : noop; - - var requireSemicolonChars = makePredicate("( [ + * / - , ."); - - function print(str) { - str = String(str); - var ch = str.charAt(0); - if (need_newline_indented && ch) { - need_newline_indented = false; - if (ch != "\n") { - print("\n"); - indent(); - } - } - if (need_space && ch) { - need_space = false; - if (!/[\s;})]/.test(ch)) { - space(); - } - } - newline_insert = -1; - var prev = last.charAt(last.length - 1); - if (might_need_semicolon) { - might_need_semicolon = false; - - if (prev == ":" && ch == "}" || (!ch || ";}".indexOf(ch) < 0) && prev != ";") { - if (options.semicolons || requireSemicolonChars[ch]) { - OUTPUT += ";"; - current_col++; - current_pos++; - } else { - fix_line(); - OUTPUT += "\n"; - current_pos++; - current_line++; - current_col = 0; - - if (/^\s+$/.test(str)) { - // reset the semicolon flag, since we didn't print one - // now and might still have to later - might_need_semicolon = true; - } - } - - if (!options.beautify) - might_need_space = false; - } - } - - if (might_need_space) { - if ((is_identifier_char(prev) - && (is_identifier_char(ch) || ch == "\\")) - || (ch == "/" && ch == prev) - || ((ch == "+" || ch == "-") && ch == last)) - { - OUTPUT += " "; - current_col++; - current_pos++; - } - might_need_space = false; - } - - if (mapping_token) { - mappings.push({ - token: mapping_token, - name: mapping_name, - line: current_line, - col: current_col - }); - mapping_token = false; - if (line_fixed) flush_mappings(); - } - - OUTPUT += str; - has_parens = str[str.length - 1] == "("; - current_pos += str.length; - var a = str.split(/\r?\n/), n = a.length - 1; - current_line += n; - current_col += a[0].length; - if (n > 0) { - fix_line(); - current_col = a[n].length; - } - last = str; - } - - var space = options.beautify ? function() { - print(" "); - } : function() { - might_need_space = true; - }; - - var indent = options.beautify ? function(half) { - if (options.beautify) { - print(make_indent(half ? 0.5 : 0)); - } - } : noop; - - var with_indent = options.beautify ? function(col, cont) { - if (col === true) col = next_indent(); - var save_indentation = indentation; - indentation = col; - var ret = cont(); - indentation = save_indentation; - return ret; - } : function(col, cont) { return cont() }; - - var may_add_newline = options.max_line_len || options.preserve_line ? function() { - fix_line(); - line_end = OUTPUT.length; - line_fixed = false; - } : noop; - - var newline = options.beautify ? function() { - if (newline_insert < 0) return print("\n"); - if (OUTPUT[newline_insert] != "\n") { - OUTPUT = OUTPUT.slice(0, newline_insert) + "\n" + OUTPUT.slice(newline_insert); - current_pos++; - current_line++; - } - newline_insert++; - } : may_add_newline; - - var semicolon = options.beautify ? function() { - print(";"); - } : function() { - might_need_semicolon = true; - }; - - function force_semicolon() { - might_need_semicolon = false; - print(";"); - } - - function next_indent() { - return indentation + options.indent_level; - } - - function with_block(cont) { - var ret; - print("{"); - newline(); - with_indent(next_indent(), function() { - ret = cont(); - }); - indent(); - print("}"); - return ret; - } - - function with_parens(cont) { - print("("); - may_add_newline(); - //XXX: still nice to have that for argument lists - //var ret = with_indent(current_col, cont); - var ret = cont(); - may_add_newline(); - print(")"); - return ret; - } - - function with_square(cont) { - print("["); - may_add_newline(); - //var ret = with_indent(current_col, cont); - var ret = cont(); - may_add_newline(); - print("]"); - return ret; - } - - function comma() { - may_add_newline(); - print(","); - may_add_newline(); - space(); - } - - function colon() { - print(":"); - space(); - } - - var add_mapping = mappings ? function(token, name) { - mapping_token = token; - mapping_name = name; - } : noop; - - function get() { - if (!line_fixed) fix_line(); - return OUTPUT; - } - - function has_nlb() { - var index = OUTPUT.lastIndexOf("\n"); - return /^ *$/.test(OUTPUT.slice(index + 1)); - } - - function prepend_comments(node) { - var self = this; - var start = node.start; - if (!start) return; - if (start.comments_before && start.comments_before._dumped === self) return; - var comments = start.comments_before; - if (!comments) { - comments = start.comments_before = []; - } - comments._dumped = self; - - if (node instanceof AST_Exit && node.value) { - var tw = new TreeWalker(function(node) { - var parent = tw.parent(); - if (parent instanceof AST_Exit - || parent instanceof AST_Binary && parent.left === node - || parent.TYPE == "Call" && parent.expression === node - || parent instanceof AST_Conditional && parent.condition === node - || parent instanceof AST_Dot && parent.expression === node - || parent instanceof AST_Sequence && parent.expressions[0] === node - || parent instanceof AST_Sub && parent.expression === node - || parent instanceof AST_UnaryPostfix) { - var text = node.start.comments_before; - if (text && text._dumped !== self) { - text._dumped = self; - comments = comments.concat(text); - } - } else { - return true; - } - }); - tw.push(node); - node.value.walk(tw); - } - - if (current_pos == 0) { - if (comments.length > 0 && options.shebang && comments[0].type == "comment5") { - print("#!" + comments.shift().value + "\n"); - indent(); - } - var preamble = options.preamble; - if (preamble) { - print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n")); - } - } - - comments = comments.filter(comment_filter, node); - if (comments.length == 0) return; - var last_nlb = has_nlb(); - comments.forEach(function(c, i) { - if (!last_nlb) { - if (c.nlb) { - print("\n"); - indent(); - last_nlb = true; - } else if (i > 0) { - space(); - } - } - if (/comment[134]/.test(c.type)) { - print("//" + c.value.replace(/[@#]__PURE__/g, ' ') + "\n"); - indent(); - last_nlb = true; - } else if (c.type == "comment2") { - print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/"); - last_nlb = false; - } - }); - if (!last_nlb) { - if (start.nlb) { - print("\n"); - indent(); - } else { - space(); - } - } - } - - function append_comments(node, tail) { - var self = this; - var token = node.end; - if (!token) return; - var comments = token[tail ? "comments_before" : "comments_after"]; - if (!comments || comments._dumped === self) return; - if (!(node instanceof AST_Statement || all(comments, function(c) { - return !/comment[134]/.test(c.type); - }))) return; - comments._dumped = self; - var insert = OUTPUT.length; - comments.filter(comment_filter, node).forEach(function(c, i) { - need_space = false; - if (need_newline_indented) { - print("\n"); - indent(); - need_newline_indented = false; - } else if (c.nlb && (i > 0 || !has_nlb())) { - print("\n"); - indent(); - } else if (i > 0 || !tail) { - space(); - } - if (/comment[134]/.test(c.type)) { - print("//" + c.value.replace(/[@#]__PURE__/g, ' ')); - need_newline_indented = true; - } else if (c.type == "comment2") { - print("/*" + c.value.replace(/[@#]__PURE__/g, ' ') + "*/"); - need_space = true; - } - }); - if (OUTPUT.length > insert) newline_insert = insert; - } - - var stack = []; - return { - get : get, - toString : get, - indent : indent, - indentation : function() { return indentation }, - current_width : function() { return current_col - indentation }, - should_break : function() { return options.width && this.current_width() >= options.width }, - has_parens : function() { return has_parens }, - newline : newline, - print : print, - space : space, - comma : comma, - colon : colon, - last : function() { return last }, - semicolon : semicolon, - force_semicolon : force_semicolon, - to_utf8 : to_utf8, - print_name : function(name) { print(make_name(name)) }, - print_string : function(str, quote, escape_directive) { - var encoded = encode_string(str, quote); - if (escape_directive === true && encoded.indexOf("\\") === -1) { - // Insert semicolons to break directive prologue - if (!EXPECT_DIRECTIVE.test(OUTPUT)) { - force_semicolon(); - } - force_semicolon(); - } - print(encoded); - }, - encode_string : encode_string, - next_indent : next_indent, - with_indent : with_indent, - with_block : with_block, - with_parens : with_parens, - with_square : with_square, - add_mapping : add_mapping, - option : function(opt) { return options[opt] }, - prepend_comments: readonly ? noop : prepend_comments, - append_comments : readonly || comment_filter === return_false ? noop : append_comments, - line : function() { return current_line }, - col : function() { return current_col }, - pos : function() { return current_pos }, - push_node : function(node) { stack.push(node) }, - pop_node : options.preserve_line ? function() { - var node = stack.pop(); - if (node.start && node.start.line > current_line) { - insert_newlines(node.start.line - current_line); - } - } : function() { - stack.pop(); - }, - parent : function(n) { - return stack[stack.length - 2 - (n || 0)]; - } - }; -} - -/* -----[ code generators ]----- */ - -(function() { - - /* -----[ utils ]----- */ - - function DEFPRINT(nodetype, generator) { - nodetype.DEFMETHOD("_codegen", generator); - } - - var in_directive = false; - var active_scope = null; - var use_asm = null; - - AST_Node.DEFMETHOD("print", function(stream, force_parens) { - var self = this, generator = self._codegen; - if (self instanceof AST_Scope) { - active_scope = self; - } - else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") { - use_asm = active_scope; - } - function doit() { - stream.prepend_comments(self); - self.add_source_map(stream); - generator(self, stream); - stream.append_comments(self); - } - stream.push_node(self); - if (force_parens || self.needs_parens(stream)) { - stream.with_parens(doit); - } else { - doit(); - } - stream.pop_node(); - if (self === use_asm) { - use_asm = null; - } - }); - AST_Node.DEFMETHOD("_print", AST_Node.prototype.print); - - AST_Node.DEFMETHOD("print_to_string", function(options) { - var s = OutputStream(options); - this.print(s); - return s.get(); - }); - - /* -----[ PARENTHESES ]----- */ - - function PARENS(nodetype, func) { - if (Array.isArray(nodetype)) { - nodetype.forEach(function(nodetype) { - PARENS(nodetype, func); - }); - } else { - nodetype.DEFMETHOD("needs_parens", func); - } - } - - PARENS(AST_Node, return_false); - - // a function expression needs parens around it when it's provably - // the first token to appear in a statement. - PARENS(AST_Function, function(output) { - if (!output.has_parens() && first_in_statement(output)) return true; - if (output.option('webkit')) { - var p = output.parent(); - if (p instanceof AST_PropAccess && p.expression === this) return true; - } - if (output.option('wrap_iife')) { - var p = output.parent(); - if (p instanceof AST_Call && p.expression === this) return true; - } - }); - - // same goes for an object literal, because otherwise it would be - // interpreted as a block of code. - PARENS(AST_Object, function(output) { - return !output.has_parens() && first_in_statement(output); - }); - - PARENS(AST_Unary, function(output) { - var p = output.parent(); - return p instanceof AST_PropAccess && p.expression === this - || p instanceof AST_Call && p.expression === this; - }); - - PARENS(AST_Sequence, function(output) { - var p = output.parent(); - return p instanceof AST_Call // (foo, bar)() or foo(1, (2, 3), 4) - || p instanceof AST_Unary // !(foo, bar, baz) - || p instanceof AST_Binary // 1 + (2, 3) + 4 ==> 8 - || p instanceof AST_VarDef // var a = (1, 2), b = a + a; ==> b == 4 - || p instanceof AST_PropAccess // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2 - || p instanceof AST_Array // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ] - || p instanceof AST_ObjectProperty // { foo: (1, 2) }.foo ==> 2 - || p instanceof AST_Conditional /* (false, true) ? (a = 10, b = 20) : (c = 30) - * ==> 20 (side effect, set a := 10 and b := 20) */ - ; - }); - - PARENS(AST_Binary, function(output) { - var p = output.parent(); - // (foo && bar)() - if (p instanceof AST_Call && p.expression === this) - return true; - // typeof (foo && bar) - if (p instanceof AST_Unary) - return true; - // (foo && bar)["prop"], (foo && bar).prop - if (p instanceof AST_PropAccess && p.expression === this) - return true; - // this deals with precedence: 3 * (2 + 1) - if (p instanceof AST_Binary) { - var po = p.operator, pp = PRECEDENCE[po]; - var so = this.operator, sp = PRECEDENCE[so]; - if (pp > sp - || (pp == sp - && this === p.right)) { - return true; - } - } - }); - - PARENS(AST_PropAccess, function(output) { - var p = output.parent(); - if (p instanceof AST_New && p.expression === this) { - // i.e. new (foo.bar().baz) - // - // if there's one call into this subtree, then we need - // parens around it too, otherwise the call will be - // interpreted as passing the arguments to the upper New - // expression. - var parens = false; - this.walk(new TreeWalker(function(node) { - if (parens || node instanceof AST_Scope) return true; - if (node instanceof AST_Call) { - parens = true; - return true; - } - })); - return parens; - } - }); - - PARENS(AST_Call, function(output) { - var p = output.parent(); - if (p instanceof AST_New && p.expression === this) return true; - // https://bugs.webkit.org/show_bug.cgi?id=123506 - if (output.option('webkit')) { - var g = output.parent(1); - return this.expression instanceof AST_Function - && p instanceof AST_PropAccess - && p.expression === this - && g instanceof AST_Assign - && g.left === p; - } - }); - - PARENS(AST_New, function(output) { - var p = output.parent(); - if (!need_constructor_parens(this, output) - && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]() - || p instanceof AST_Call && p.expression === this)) // (new foo)(bar) - return true; - }); - - PARENS(AST_Number, function(output) { - var p = output.parent(); - if (p instanceof AST_PropAccess && p.expression === this) { - var value = this.getValue(); - if (value < 0 || /^0/.test(make_num(value))) { - return true; - } - } - }); - - PARENS([ AST_Assign, AST_Conditional ], function(output) { - var p = output.parent(); - // !(a = false) → true - if (p instanceof AST_Unary) - return true; - // 1 + (a = 2) + 3 → 6, side effect setting a = 2 - if (p instanceof AST_Binary && !(p instanceof AST_Assign)) - return true; - // (a = func)() —or— new (a = Object)() - if (p instanceof AST_Call && p.expression === this) - return true; - // (a = foo) ? bar : baz - if (p instanceof AST_Conditional && p.condition === this) - return true; - // (a = foo)["prop"] —or— (a = foo).prop - if (p instanceof AST_PropAccess && p.expression === this) - return true; - }); - - /* -----[ PRINTERS ]----- */ - - DEFPRINT(AST_Directive, function(self, output) { - output.print_string(self.value, self.quote); - output.semicolon(); - }); - DEFPRINT(AST_Debugger, function(self, output) { - output.print("debugger"); - output.semicolon(); - }); - - /* -----[ statements ]----- */ - - function display_body(body, is_toplevel, output, allow_directives) { - var last = body.length - 1; - in_directive = allow_directives; - body.forEach(function(stmt, i) { - if (in_directive === true && !(stmt instanceof AST_Directive || - stmt instanceof AST_EmptyStatement || - (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String) - )) { - in_directive = false; - } - if (!(stmt instanceof AST_EmptyStatement)) { - output.indent(); - stmt.print(output); - if (!(i == last && is_toplevel)) { - output.newline(); - if (is_toplevel) output.newline(); - } - } - if (in_directive === true && - stmt instanceof AST_SimpleStatement && - stmt.body instanceof AST_String - ) { - in_directive = false; - } - }); - in_directive = false; - } - - AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) { - force_statement(this.body, output); - }); - - DEFPRINT(AST_Statement, function(self, output) { - self.body.print(output); - output.semicolon(); - }); - DEFPRINT(AST_Toplevel, function(self, output) { - display_body(self.body, true, output, true); - output.print(""); - }); - DEFPRINT(AST_LabeledStatement, function(self, output) { - self.label.print(output); - output.colon(); - self.body.print(output); - }); - DEFPRINT(AST_SimpleStatement, function(self, output) { - self.body.print(output); - output.semicolon(); - }); - function print_braced_empty(self, output) { - output.print("{"); - output.with_indent(output.next_indent(), function() { - output.append_comments(self, true); - }); - output.print("}"); - } - function print_braced(self, output, allow_directives) { - if (self.body.length > 0) { - output.with_block(function() { - display_body(self.body, false, output, allow_directives); - }); - } else print_braced_empty(self, output); - } - DEFPRINT(AST_BlockStatement, function(self, output) { - print_braced(self, output); - }); - DEFPRINT(AST_EmptyStatement, function(self, output) { - output.semicolon(); - }); - DEFPRINT(AST_Do, function(self, output) { - output.print("do"); - output.space(); - make_block(self.body, output); - output.space(); - output.print("while"); - output.space(); - output.with_parens(function() { - self.condition.print(output); - }); - output.semicolon(); - }); - DEFPRINT(AST_While, function(self, output) { - output.print("while"); - output.space(); - output.with_parens(function() { - self.condition.print(output); - }); - output.space(); - self._do_print_body(output); - }); - DEFPRINT(AST_For, function(self, output) { - output.print("for"); - output.space(); - output.with_parens(function() { - if (self.init) { - if (self.init instanceof AST_Definitions) { - self.init.print(output); - } else { - parenthesize_for_noin(self.init, output, true); - } - output.print(";"); - output.space(); - } else { - output.print(";"); - } - if (self.condition) { - self.condition.print(output); - output.print(";"); - output.space(); - } else { - output.print(";"); - } - if (self.step) { - self.step.print(output); - } - }); - output.space(); - self._do_print_body(output); - }); - DEFPRINT(AST_ForIn, function(self, output) { - output.print("for"); - output.space(); - output.with_parens(function() { - self.init.print(output); - output.space(); - output.print("in"); - output.space(); - self.object.print(output); - }); - output.space(); - self._do_print_body(output); - }); - DEFPRINT(AST_With, function(self, output) { - output.print("with"); - output.space(); - output.with_parens(function() { - self.expression.print(output); - }); - output.space(); - self._do_print_body(output); - }); - - /* -----[ functions ]----- */ - AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) { - var self = this; - if (!nokeyword) { - output.print("function"); - } - if (self.name) { - output.space(); - self.name.print(output); - } - output.with_parens(function() { - self.argnames.forEach(function(arg, i) { - if (i) output.comma(); - arg.print(output); - }); - }); - output.space(); - print_braced(self, output, true); - }); - DEFPRINT(AST_Lambda, function(self, output) { - self._do_print(output); - }); - - /* -----[ jumps ]----- */ - function print_jump(output, kind, target) { - output.print(kind); - if (target) { - output.space(); - target.print(output); - } - output.semicolon(); - } - - DEFPRINT(AST_Return, function(self, output) { - print_jump(output, "return", self.value); - }); - DEFPRINT(AST_Throw, function(self, output) { - print_jump(output, "throw", self.value); - }); - DEFPRINT(AST_Break, function(self, output) { - print_jump(output, "break", self.label); - }); - DEFPRINT(AST_Continue, function(self, output) { - print_jump(output, "continue", self.label); - }); - - /* -----[ if ]----- */ - function make_then(self, output) { - var b = self.body; - if (output.option("braces") - || output.option("ie8") && b instanceof AST_Do) - return make_block(b, output); - // The squeezer replaces "block"-s that contain only a single - // statement with the statement itself; technically, the AST - // is correct, but this can create problems when we output an - // IF having an ELSE clause where the THEN clause ends in an - // IF *without* an ELSE block (then the outer ELSE would refer - // to the inner IF). This function checks for this case and - // adds the block braces if needed. - if (!b) return output.force_semicolon(); - while (true) { - if (b instanceof AST_If) { - if (!b.alternative) { - make_block(self.body, output); - return; - } - b = b.alternative; - } - else if (b instanceof AST_StatementWithBody) { - b = b.body; - } - else break; - } - force_statement(self.body, output); - } - DEFPRINT(AST_If, function(self, output) { - output.print("if"); - output.space(); - output.with_parens(function() { - self.condition.print(output); - }); - output.space(); - if (self.alternative) { - make_then(self, output); - output.space(); - output.print("else"); - output.space(); - if (self.alternative instanceof AST_If) - self.alternative.print(output); - else - force_statement(self.alternative, output); - } else { - self._do_print_body(output); - } - }); - - /* -----[ switch ]----- */ - DEFPRINT(AST_Switch, function(self, output) { - output.print("switch"); - output.space(); - output.with_parens(function() { - self.expression.print(output); - }); - output.space(); - var last = self.body.length - 1; - if (last < 0) print_braced_empty(self, output); - else output.with_block(function() { - self.body.forEach(function(branch, i) { - output.indent(true); - branch.print(output); - if (i < last && branch.body.length > 0) - output.newline(); - }); - }); - }); - AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) { - output.newline(); - this.body.forEach(function(stmt) { - output.indent(); - stmt.print(output); - output.newline(); - }); - }); - DEFPRINT(AST_Default, function(self, output) { - output.print("default:"); - self._do_print_body(output); - }); - DEFPRINT(AST_Case, function(self, output) { - output.print("case"); - output.space(); - self.expression.print(output); - output.print(":"); - self._do_print_body(output); - }); - - /* -----[ exceptions ]----- */ - DEFPRINT(AST_Try, function(self, output) { - output.print("try"); - output.space(); - print_braced(self, output); - if (self.bcatch) { - output.space(); - self.bcatch.print(output); - } - if (self.bfinally) { - output.space(); - self.bfinally.print(output); - } - }); - DEFPRINT(AST_Catch, function(self, output) { - output.print("catch"); - output.space(); - output.with_parens(function() { - self.argname.print(output); - }); - output.space(); - print_braced(self, output); - }); - DEFPRINT(AST_Finally, function(self, output) { - output.print("finally"); - output.space(); - print_braced(self, output); - }); - - DEFPRINT(AST_Var, function(self, output) { - output.print("var"); - output.space(); - self.definitions.forEach(function(def, i) { - if (i) output.comma(); - def.print(output); - }); - var p = output.parent(); - if (p && p.init !== self || !(p instanceof AST_For || p instanceof AST_ForIn)) output.semicolon(); - }); - - function parenthesize_for_noin(node, output, noin) { - var parens = false; - // need to take some precautions here: - // https://github.com/mishoo/UglifyJS2/issues/60 - if (noin) node.walk(new TreeWalker(function(node) { - if (parens || node instanceof AST_Scope) return true; - if (node instanceof AST_Binary && node.operator == "in") { - parens = true; - return true; - } - })); - node.print(output, parens); - } - - DEFPRINT(AST_VarDef, function(self, output) { - self.name.print(output); - if (self.value) { - output.space(); - output.print("="); - output.space(); - var p = output.parent(1); - var noin = p instanceof AST_For || p instanceof AST_ForIn; - parenthesize_for_noin(self.value, output, noin); - } - }); - - /* -----[ other expressions ]----- */ - DEFPRINT(AST_Call, function(self, output) { - self.expression.print(output); - if (self instanceof AST_New && !need_constructor_parens(self, output)) - return; - if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) { - output.add_mapping(self.start); - } - output.with_parens(function() { - self.args.forEach(function(expr, i) { - if (i) output.comma(); - expr.print(output); - }); - }); - }); - DEFPRINT(AST_New, function(self, output) { - output.print("new"); - output.space(); - AST_Call.prototype._codegen(self, output); - }); - DEFPRINT(AST_Sequence, function(self, output) { - self.expressions.forEach(function(node, index) { - if (index > 0) { - output.comma(); - if (output.should_break()) { - output.newline(); - output.indent(); - } - } - node.print(output); - }); - }); - DEFPRINT(AST_Dot, function(self, output) { - var expr = self.expression; - expr.print(output); - var prop = self.property; - if (output.option("ie8") && RESERVED_WORDS[prop]) { - output.print("["); - output.add_mapping(self.end); - output.print_string(prop); - output.print("]"); - } else { - if (expr instanceof AST_Number && expr.getValue() >= 0) { - if (!/[xa-f.)]/i.test(output.last())) { - output.print("."); - } - } - output.print("."); - // the name after dot would be mapped about here. - output.add_mapping(self.end); - output.print_name(prop); - } - }); - DEFPRINT(AST_Sub, function(self, output) { - self.expression.print(output); - output.print("["); - self.property.print(output); - output.print("]"); - }); - DEFPRINT(AST_UnaryPrefix, function(self, output) { - var op = self.operator; - output.print(op); - if (/^[a-z]/i.test(op) - || (/[+-]$/.test(op) - && self.expression instanceof AST_UnaryPrefix - && /^[+-]/.test(self.expression.operator))) { - output.space(); - } - self.expression.print(output); - }); - DEFPRINT(AST_UnaryPostfix, function(self, output) { - self.expression.print(output); - output.print(self.operator); - }); - DEFPRINT(AST_Binary, function(self, output) { - var op = self.operator; - self.left.print(output); - if (op[0] == ">" /* ">>" ">>>" ">" ">=" */ - && self.left instanceof AST_UnaryPostfix - && self.left.operator == "--") { - // space is mandatory to avoid outputting --> - output.print(" "); - } else { - // the space is optional depending on "beautify" - output.space(); - } - output.print(op); - if ((op == "<" || op == "<<") - && self.right instanceof AST_UnaryPrefix - && self.right.operator == "!" - && self.right.expression instanceof AST_UnaryPrefix - && self.right.expression.operator == "--") { - // space is mandatory to avoid outputting <!-- - output.print(" "); - } else { - // the space is optional depending on "beautify" - output.space(); - } - self.right.print(output); - }); - DEFPRINT(AST_Conditional, function(self, output) { - self.condition.print(output); - output.space(); - output.print("?"); - output.space(); - self.consequent.print(output); - output.space(); - output.colon(); - self.alternative.print(output); - }); - - /* -----[ literals ]----- */ - DEFPRINT(AST_Array, function(self, output) { - output.with_square(function() { - var a = self.elements, len = a.length; - if (len > 0) output.space(); - a.forEach(function(exp, i) { - if (i) output.comma(); - exp.print(output); - // If the final element is a hole, we need to make sure it - // doesn't look like a trailing comma, by inserting an actual - // trailing comma. - if (i === len - 1 && exp instanceof AST_Hole) - output.comma(); - }); - if (len > 0) output.space(); - }); - }); - DEFPRINT(AST_Object, function(self, output) { - if (self.properties.length > 0) output.with_block(function() { - self.properties.forEach(function(prop, i) { - if (i) { - output.print(","); - output.newline(); - } - output.indent(); - prop.print(output); - }); - output.newline(); - }); - else print_braced_empty(self, output); - }); - - function print_property_name(key, quote, output) { - if (output.option("quote_keys")) { - output.print_string(key); - } else if ("" + +key == key && key >= 0) { - output.print(make_num(key)); - } else if (RESERVED_WORDS[key] ? !output.option("ie8") : is_identifier_string(key)) { - if (quote && output.option("keep_quoted_props")) { - output.print_string(key, quote); - } else { - output.print_name(key); - } - } else { - output.print_string(key, quote); - } - } - - DEFPRINT(AST_ObjectKeyVal, function(self, output) { - print_property_name(self.key, self.quote, output); - output.colon(); - self.value.print(output); - }); - AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, output) { - output.print(type); - output.space(); - print_property_name(this.key.name, this.quote, output); - this.value._do_print(output, true); - }); - DEFPRINT(AST_ObjectSetter, function(self, output) { - self._print_getter_setter("set", output); - }); - DEFPRINT(AST_ObjectGetter, function(self, output) { - self._print_getter_setter("get", output); - }); - DEFPRINT(AST_Symbol, function(self, output) { - var def = self.definition(); - output.print_name(def ? def.mangled_name || def.name : self.name); - }); - DEFPRINT(AST_Hole, noop); - DEFPRINT(AST_This, function(self, output) { - output.print("this"); - }); - DEFPRINT(AST_Constant, function(self, output) { - output.print(self.getValue()); - }); - DEFPRINT(AST_String, function(self, output) { - output.print_string(self.getValue(), self.quote, in_directive); - }); - DEFPRINT(AST_Number, function(self, output) { - if (use_asm && self.start && self.start.raw != null) { - output.print(self.start.raw); - } else { - output.print(make_num(self.getValue())); - } - }); - - DEFPRINT(AST_RegExp, function(self, output) { - var regexp = self.getValue(); - var str = regexp.toString(); - if (regexp.raw_source) { - str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/")); - } - str = output.to_utf8(str); - output.print(str); - var p = output.parent(); - if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self) - output.print(" "); - }); - - function force_statement(stat, output) { - if (output.option("braces")) { - make_block(stat, output); - } else { - if (!stat || stat instanceof AST_EmptyStatement) - output.force_semicolon(); - else - stat.print(output); - } - } - - // self should be AST_New. decide if we want to show parens or not. - function need_constructor_parens(self, output) { - // Always print parentheses with arguments - if (self.args.length > 0) return true; - - return output.option("beautify"); - } - - function best_of(a) { - var best = a[0], len = best.length; - for (var i = 1; i < a.length; ++i) { - if (a[i].length < len) { - best = a[i]; - len = best.length; - } - } - return best; - } - - function make_num(num) { - var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e"); - var candidates = [ str ]; - if (Math.floor(num) === num) { - if (num < 0) { - candidates.push("-0x" + (-num).toString(16).toLowerCase()); - } else { - candidates.push("0x" + num.toString(16).toLowerCase()); - } - } - var match, len, digits; - if (match = /^\.0+/.exec(str)) { - len = match[0].length; - digits = str.slice(len); - candidates.push(digits + "e-" + (digits.length + len - 1)); - } else if (match = /0+$/.exec(str)) { - len = match[0].length; - candidates.push(str.slice(0, -len) + "e" + len); - } else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) { - candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length)); - } - return best_of(candidates); - } - - function make_block(stmt, output) { - if (!stmt || stmt instanceof AST_EmptyStatement) - output.print("{}"); - else if (stmt instanceof AST_BlockStatement) - stmt.print(output); - else output.with_block(function() { - output.indent(); - stmt.print(output); - output.newline(); - }); - } - - /* -----[ source map generators ]----- */ - - function DEFMAP(nodetype, generator) { - nodetype.forEach(function(nodetype) { - nodetype.DEFMETHOD("add_source_map", generator); - }); - } - - DEFMAP([ - // We could easily add info for ALL nodes, but it seems to me that - // would be quite wasteful, hence this noop in the base class. - AST_Node, - // since the label symbol will mark it - AST_LabeledStatement, - AST_Toplevel, - ], noop); - - // XXX: I'm not exactly sure if we need it for all of these nodes, - // or if we should add even more. - DEFMAP([ - AST_Array, - AST_BlockStatement, - AST_Catch, - AST_Constant, - AST_Debugger, - AST_Definitions, - AST_Directive, - AST_Finally, - AST_Jump, - AST_Lambda, - AST_New, - AST_Object, - AST_StatementWithBody, - AST_Symbol, - AST_Switch, - AST_SwitchBranch, - AST_Try, - ], function(output) { - output.add_mapping(this.start); - }); - - DEFMAP([ - AST_ObjectGetter, - AST_ObjectSetter, - ], function(output) { - output.add_mapping(this.start, this.key.name); - }); - - DEFMAP([ AST_ObjectProperty ], function(output) { - output.add_mapping(this.start, this.key); - }); -})(); |