637 lines
23 KiB
JavaScript
637 lines
23 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() {
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function normalize_directives(body) {
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var in_directive = true;
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for (var i = 0; i < body.length; i++) {
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if (in_directive && body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
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body[i] = new AST_Directive({
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start: body[i].start,
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end: body[i].end,
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value: body[i].body.value
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});
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} else if (in_directive && !(body[i] instanceof AST_Statement && body[i].body instanceof AST_String)) {
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in_directive = false;
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}
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}
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return body;
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}
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var MOZ_TO_ME = {
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Program: function(M) {
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return new AST_Toplevel({
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start: my_start_token(M),
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end: my_end_token(M),
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body: normalize_directives(M.body.map(from_moz))
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});
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},
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FunctionDeclaration: function(M) {
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return new AST_Defun({
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start: my_start_token(M),
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end: my_end_token(M),
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name: from_moz(M.id),
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argnames: M.params.map(from_moz),
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body: normalize_directives(from_moz(M.body).body)
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});
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},
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FunctionExpression: function(M) {
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return new AST_Function({
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start: my_start_token(M),
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end: my_end_token(M),
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name: from_moz(M.id),
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argnames: M.params.map(from_moz),
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body: normalize_directives(from_moz(M.body).body)
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});
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},
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ExpressionStatement: function(M) {
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return new AST_SimpleStatement({
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start: my_start_token(M),
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end: my_end_token(M),
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body: from_moz(M.expression)
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});
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},
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TryStatement: function(M) {
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var handlers = M.handlers || [M.handler];
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if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
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throw new Error("Multiple catch clauses are not supported.");
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}
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return new AST_Try({
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start : my_start_token(M),
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end : my_end_token(M),
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body : from_moz(M.block).body,
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bcatch : from_moz(handlers[0]),
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bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
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});
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},
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Property: function(M) {
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var key = M.key;
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var args = {
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start : my_start_token(key),
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end : my_end_token(M.value),
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key : "" + key[key.type == "Identifier" ? "name" : "value"],
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value : from_moz(M.value)
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};
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if (M.kind == "init") return new AST_ObjectKeyVal(args);
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args.value = new AST_Accessor(args.value);
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if (M.kind == "get") return new AST_ObjectGetter(args);
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if (M.kind == "set") return new AST_ObjectSetter(args);
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},
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ArrayExpression: function(M) {
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return new AST_Array({
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start : my_start_token(M),
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end : my_end_token(M),
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elements : M.elements.map(function(elem) {
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return elem === null ? new AST_Hole() : from_moz(elem);
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})
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});
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},
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ObjectExpression: function(M) {
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return new AST_Object({
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start : my_start_token(M),
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end : my_end_token(M),
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properties : M.properties.map(function(prop) {
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prop.type = "Property";
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return from_moz(prop)
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})
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});
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},
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SequenceExpression: function(M) {
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return new AST_Sequence({
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start : my_start_token(M),
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end : my_end_token(M),
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expressions: M.expressions.map(from_moz)
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});
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},
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MemberExpression: function(M) {
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return new (M.computed ? AST_Sub : AST_Dot)({
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start : my_start_token(M),
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end : my_end_token(M),
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property : M.computed ? from_moz(M.property) : M.property.name,
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expression : from_moz(M.object)
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});
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},
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SwitchCase: function(M) {
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return new (M.test ? AST_Case : AST_Default)({
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start : my_start_token(M),
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end : my_end_token(M),
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expression : from_moz(M.test),
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body : M.consequent.map(from_moz)
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});
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},
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VariableDeclaration: function(M) {
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return new AST_Var({
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start : my_start_token(M),
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end : my_end_token(M),
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definitions : M.declarations.map(from_moz)
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});
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},
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Literal: function(M) {
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var val = M.value, args = {
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start : my_start_token(M),
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end : my_end_token(M)
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};
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if (val === null) return new AST_Null(args);
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var rx = M.regex;
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if (rx && rx.pattern) {
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// RegExpLiteral as per ESTree AST spec
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args.value = new RegExp(rx.pattern, rx.flags);
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args.value.raw_source = rx.pattern;
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return new AST_RegExp(args);
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} else if (rx) {
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// support legacy RegExp
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args.value = M.regex && M.raw ? M.raw : val;
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return new AST_RegExp(args);
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}
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switch (typeof val) {
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case "string":
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args.value = val;
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return new AST_String(args);
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case "number":
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args.value = val;
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return new AST_Number(args);
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case "boolean":
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return new (val ? AST_True : AST_False)(args);
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}
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},
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Identifier: function(M) {
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var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
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return new ( p.type == "LabeledStatement" ? AST_Label
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: p.type == "VariableDeclarator" && p.id === M ? AST_SymbolVar
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: p.type == "FunctionExpression" ? (p.id === M ? AST_SymbolLambda : AST_SymbolFunarg)
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: p.type == "FunctionDeclaration" ? (p.id === M ? AST_SymbolDefun : AST_SymbolFunarg)
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: p.type == "CatchClause" ? AST_SymbolCatch
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: p.type == "BreakStatement" || p.type == "ContinueStatement" ? AST_LabelRef
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: AST_SymbolRef)({
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start : my_start_token(M),
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end : my_end_token(M),
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name : M.name
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});
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},
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ThisExpression: function(M) {
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return new AST_This({
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start : my_start_token(M),
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end : my_end_token(M),
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name : "this",
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});
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},
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};
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MOZ_TO_ME.UpdateExpression =
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MOZ_TO_ME.UnaryExpression = function To_Moz_Unary(M) {
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var prefix = "prefix" in M ? M.prefix
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: M.type == "UnaryExpression" ? true : false;
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return new (prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
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start : my_start_token(M),
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end : my_end_token(M),
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operator : M.operator,
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expression : from_moz(M.argument)
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});
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};
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map("EmptyStatement", AST_EmptyStatement);
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map("BlockStatement", AST_BlockStatement, "body@body");
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map("IfStatement", AST_If, "test>condition, consequent>body, alternate>alternative");
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map("LabeledStatement", AST_LabeledStatement, "label>label, body>body");
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map("BreakStatement", AST_Break, "label>label");
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map("ContinueStatement", AST_Continue, "label>label");
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map("WithStatement", AST_With, "object>expression, body>body");
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map("SwitchStatement", AST_Switch, "discriminant>expression, cases@body");
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map("ReturnStatement", AST_Return, "argument>value");
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map("ThrowStatement", AST_Throw, "argument>value");
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map("WhileStatement", AST_While, "test>condition, body>body");
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map("DoWhileStatement", AST_Do, "test>condition, body>body");
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map("ForStatement", AST_For, "init>init, test>condition, update>step, body>body");
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map("ForInStatement", AST_ForIn, "left>init, right>object, body>body");
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map("DebuggerStatement", AST_Debugger);
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map("VariableDeclarator", AST_VarDef, "id>name, init>value");
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map("CatchClause", AST_Catch, "param>argname, body%body");
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map("BinaryExpression", AST_Binary, "operator=operator, left>left, right>right");
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map("LogicalExpression", AST_Binary, "operator=operator, left>left, right>right");
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map("AssignmentExpression", AST_Assign, "operator=operator, left>left, right>right");
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map("ConditionalExpression", AST_Conditional, "test>condition, consequent>consequent, alternate>alternative");
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map("NewExpression", AST_New, "callee>expression, arguments@args");
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map("CallExpression", AST_Call, "callee>expression, arguments@args");
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def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
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return to_moz_scope("Program", M);
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});
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def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
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return {
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type: "FunctionDeclaration",
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id: to_moz(M.name),
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params: M.argnames.map(to_moz),
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body: to_moz_scope("BlockStatement", M)
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}
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});
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def_to_moz(AST_Function, function To_Moz_FunctionExpression(M) {
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return {
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type: "FunctionExpression",
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id: to_moz(M.name),
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params: M.argnames.map(to_moz),
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body: to_moz_scope("BlockStatement", M)
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}
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});
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def_to_moz(AST_Directive, function To_Moz_Directive(M) {
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return {
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type: "ExpressionStatement",
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expression: {
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type: "Literal",
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value: M.value
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}
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};
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});
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def_to_moz(AST_SimpleStatement, function To_Moz_ExpressionStatement(M) {
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return {
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type: "ExpressionStatement",
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expression: to_moz(M.body)
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};
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});
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def_to_moz(AST_SwitchBranch, function To_Moz_SwitchCase(M) {
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return {
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type: "SwitchCase",
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test: to_moz(M.expression),
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consequent: M.body.map(to_moz)
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};
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});
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def_to_moz(AST_Try, function To_Moz_TryStatement(M) {
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return {
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type: "TryStatement",
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block: to_moz_block(M),
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handler: to_moz(M.bcatch),
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guardedHandlers: [],
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finalizer: to_moz(M.bfinally)
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};
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});
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def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
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return {
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type: "CatchClause",
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param: to_moz(M.argname),
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guard: null,
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body: to_moz_block(M)
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};
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});
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def_to_moz(AST_Definitions, function To_Moz_VariableDeclaration(M) {
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return {
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type: "VariableDeclaration",
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kind: "var",
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declarations: M.definitions.map(to_moz)
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};
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});
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def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
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return {
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type: "SequenceExpression",
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expressions: M.expressions.map(to_moz)
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};
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});
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def_to_moz(AST_PropAccess, function To_Moz_MemberExpression(M) {
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var isComputed = M instanceof AST_Sub;
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return {
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type: "MemberExpression",
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object: to_moz(M.expression),
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computed: isComputed,
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property: isComputed ? to_moz(M.property) : {type: "Identifier", name: M.property}
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};
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});
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def_to_moz(AST_Unary, function To_Moz_Unary(M) {
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return {
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type: M.operator == "++" || M.operator == "--" ? "UpdateExpression" : "UnaryExpression",
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operator: M.operator,
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prefix: M instanceof AST_UnaryPrefix,
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argument: to_moz(M.expression)
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};
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});
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def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
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return {
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type: M.operator == "&&" || M.operator == "||" ? "LogicalExpression" : "BinaryExpression",
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left: to_moz(M.left),
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operator: M.operator,
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right: to_moz(M.right)
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};
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});
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def_to_moz(AST_Array, function To_Moz_ArrayExpression(M) {
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return {
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type: "ArrayExpression",
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elements: M.elements.map(to_moz)
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};
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});
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def_to_moz(AST_Object, function To_Moz_ObjectExpression(M) {
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return {
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type: "ObjectExpression",
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properties: M.properties.map(to_moz)
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};
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});
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def_to_moz(AST_ObjectProperty, function To_Moz_Property(M) {
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var key = {
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type: "Literal",
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value: M.key
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};
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var kind;
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if (M instanceof AST_ObjectKeyVal) {
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kind = "init";
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} else
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if (M instanceof AST_ObjectGetter) {
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kind = "get";
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} else
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if (M instanceof AST_ObjectSetter) {
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kind = "set";
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}
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return {
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type: "Property",
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kind: kind,
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key: key,
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value: to_moz(M.value)
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};
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});
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def_to_moz(AST_Symbol, function To_Moz_Identifier(M) {
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var def = M.definition();
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return {
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type: "Identifier",
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name: def && def.mangled_name || M.name
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};
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});
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def_to_moz(AST_This, function To_Moz_ThisExpression() {
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return { type: "ThisExpression" };
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});
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def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
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var flags = M.value.toString().match(/[gimuy]*$/)[0];
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var value = "/" + M.value.raw_source + "/" + flags;
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return {
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type: "Literal",
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value: value,
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raw: value,
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regex: {
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pattern: M.value.raw_source,
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flags: flags
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}
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};
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});
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def_to_moz(AST_Constant, function To_Moz_Literal(M) {
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var value = M.value;
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if (typeof value === 'number' && (value < 0 || (value === 0 && 1 / value < 0))) {
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return {
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type: "UnaryExpression",
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operator: "-",
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prefix: true,
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argument: {
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type: "Literal",
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value: -value,
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raw: M.start.raw
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}
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};
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}
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return {
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type: "Literal",
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value: value,
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raw: M.start.raw
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};
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});
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def_to_moz(AST_Atom, function To_Moz_Atom(M) {
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return {
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type: "Identifier",
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name: String(M.value)
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};
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});
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AST_Boolean.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
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AST_Null.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
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AST_Hole.DEFMETHOD("to_mozilla_ast", function To_Moz_ArrayHole() { return null });
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AST_Block.DEFMETHOD("to_mozilla_ast", AST_BlockStatement.prototype.to_mozilla_ast);
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AST_Lambda.DEFMETHOD("to_mozilla_ast", AST_Function.prototype.to_mozilla_ast);
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/* -----[ tools ]----- */
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function raw_token(moznode) {
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if (moznode.type == "Literal") {
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return moznode.raw != null ? moznode.raw : moznode.value + "";
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}
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}
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function my_start_token(moznode) {
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var loc = moznode.loc, start = loc && loc.start;
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var range = moznode.range;
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return new AST_Token({
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file : loc && loc.source,
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line : start && start.line,
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col : start && start.column,
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pos : range ? range[0] : moznode.start,
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endline : start && start.line,
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endcol : start && start.column,
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endpos : range ? range[0] : moznode.start,
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raw : raw_token(moznode),
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});
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}
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function my_end_token(moznode) {
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var loc = moznode.loc, end = loc && loc.end;
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var range = moznode.range;
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return new AST_Token({
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file : loc && loc.source,
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line : end && end.line,
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col : end && end.column,
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pos : range ? range[1] : moznode.end,
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endline : end && end.line,
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endcol : end && end.column,
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endpos : range ? range[1] : moznode.end,
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raw : raw_token(moznode),
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});
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}
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function map(moztype, mytype, propmap) {
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var moz_to_me = "function From_Moz_" + moztype + "(M){\n";
|
|
moz_to_me += "return new U2." + mytype.name + "({\n" +
|
|
"start: my_start_token(M),\n" +
|
|
"end: my_end_token(M)";
|
|
|
|
var me_to_moz = "function To_Moz_" + moztype + "(M){\n";
|
|
me_to_moz += "return {\n" +
|
|
"type: " + JSON.stringify(moztype);
|
|
|
|
if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop) {
|
|
var m = /([a-z0-9$_]+)(=|@|>|%)([a-z0-9$_]+)/i.exec(prop);
|
|
if (!m) throw new Error("Can't understand property map: " + prop);
|
|
var moz = m[1], how = m[2], my = m[3];
|
|
moz_to_me += ",\n" + my + ": ";
|
|
me_to_moz += ",\n" + moz + ": ";
|
|
switch (how) {
|
|
case "@":
|
|
moz_to_me += "M." + moz + ".map(from_moz)";
|
|
me_to_moz += "M." + my + ".map(to_moz)";
|
|
break;
|
|
case ">":
|
|
moz_to_me += "from_moz(M." + moz + ")";
|
|
me_to_moz += "to_moz(M." + my + ")";
|
|
break;
|
|
case "=":
|
|
moz_to_me += "M." + moz;
|
|
me_to_moz += "M." + my;
|
|
break;
|
|
case "%":
|
|
moz_to_me += "from_moz(M." + moz + ").body";
|
|
me_to_moz += "to_moz_block(M)";
|
|
break;
|
|
default:
|
|
throw new Error("Can't understand operator in propmap: " + prop);
|
|
}
|
|
});
|
|
|
|
moz_to_me += "\n})\n}";
|
|
me_to_moz += "\n}\n}";
|
|
|
|
//moz_to_me = parse(moz_to_me).print_to_string({ beautify: true });
|
|
//me_to_moz = parse(me_to_moz).print_to_string({ beautify: true });
|
|
//console.log(moz_to_me);
|
|
|
|
moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
|
|
exports, my_start_token, my_end_token, from_moz
|
|
);
|
|
me_to_moz = new Function("to_moz", "to_moz_block", "to_moz_scope", "return(" + me_to_moz + ")")(
|
|
to_moz, to_moz_block, to_moz_scope
|
|
);
|
|
MOZ_TO_ME[moztype] = moz_to_me;
|
|
def_to_moz(mytype, me_to_moz);
|
|
}
|
|
|
|
var FROM_MOZ_STACK = null;
|
|
|
|
function from_moz(node) {
|
|
FROM_MOZ_STACK.push(node);
|
|
var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
|
|
FROM_MOZ_STACK.pop();
|
|
return ret;
|
|
}
|
|
|
|
AST_Node.from_mozilla_ast = function(node) {
|
|
var save_stack = FROM_MOZ_STACK;
|
|
FROM_MOZ_STACK = [];
|
|
var ast = from_moz(node);
|
|
FROM_MOZ_STACK = save_stack;
|
|
ast.walk(new TreeWalker(function(node) {
|
|
if (node instanceof AST_LabelRef) {
|
|
for (var level = 0, parent; parent = this.parent(level); level++) {
|
|
if (parent instanceof AST_Scope) break;
|
|
if (parent instanceof AST_LabeledStatement && parent.label.name == node.name) {
|
|
node.thedef = parent.label;
|
|
break;
|
|
}
|
|
}
|
|
if (!node.thedef) {
|
|
var s = node.start;
|
|
js_error("Undefined label " + node.name, s.file, s.line, s.col, s.pos);
|
|
}
|
|
}
|
|
}));
|
|
return ast;
|
|
};
|
|
|
|
function set_moz_loc(mynode, moznode, myparent) {
|
|
var start = mynode.start;
|
|
var end = mynode.end;
|
|
if (start.pos != null && end.endpos != null) {
|
|
moznode.range = [start.pos, end.endpos];
|
|
}
|
|
if (start.line) {
|
|
moznode.loc = {
|
|
start: {line: start.line, column: start.col},
|
|
end: end.endline ? {line: end.endline, column: end.endcol} : null
|
|
};
|
|
if (start.file) {
|
|
moznode.loc.source = start.file;
|
|
}
|
|
}
|
|
return moznode;
|
|
}
|
|
|
|
function def_to_moz(mytype, handler) {
|
|
mytype.DEFMETHOD("to_mozilla_ast", function() {
|
|
return set_moz_loc(this, handler(this));
|
|
});
|
|
}
|
|
|
|
function to_moz(node) {
|
|
return node != null ? node.to_mozilla_ast() : null;
|
|
}
|
|
|
|
function to_moz_block(node) {
|
|
return {
|
|
type: "BlockStatement",
|
|
body: node.body.map(to_moz)
|
|
};
|
|
}
|
|
|
|
function to_moz_scope(type, node) {
|
|
var body = node.body.map(to_moz);
|
|
if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
|
|
body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
|
|
}
|
|
return {
|
|
type: type,
|
|
body: body
|
|
};
|
|
}
|
|
})();
|