| /* |
| Copyright (C) 2012-2014 Yusuke Suzuki <utatane.tea@gmail.com> |
| Copyright (C) 2015 Ingvar Stepanyan <me@rreverser.com> |
| Copyright (C) 2014 Ivan Nikulin <ifaaan@gmail.com> |
| Copyright (C) 2012-2013 Michael Ficarra <escodegen.copyright@michael.ficarra.me> |
| Copyright (C) 2012-2013 Mathias Bynens <mathias@qiwi.be> |
| Copyright (C) 2013 Irakli Gozalishvili <rfobic@gmail.com> |
| Copyright (C) 2012 Robert Gust-Bardon <donate@robert.gust-bardon.org> |
| Copyright (C) 2012 John Freeman <jfreeman08@gmail.com> |
| Copyright (C) 2011-2012 Ariya Hidayat <ariya.hidayat@gmail.com> |
| Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl> |
| Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com> |
| Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.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 HOLDERS AND CONTRIBUTORS "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 <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. |
| */ |
| |
| /*global exports:true, require:true, global:true*/ |
| (function () { |
| 'use strict'; |
| |
| var Syntax, |
| Precedence, |
| BinaryPrecedence, |
| SourceNode, |
| estraverse, |
| esutils, |
| base, |
| indent, |
| json, |
| renumber, |
| hexadecimal, |
| quotes, |
| escapeless, |
| newline, |
| space, |
| parentheses, |
| semicolons, |
| safeConcatenation, |
| directive, |
| extra, |
| parse, |
| sourceMap, |
| sourceCode, |
| preserveBlankLines, |
| FORMAT_MINIFY, |
| FORMAT_DEFAULTS; |
| |
| estraverse = require('estraverse'); |
| esutils = require('esutils'); |
| |
| Syntax = estraverse.Syntax; |
| |
| // Generation is done by generateExpression. |
| function isExpression(node) { |
| return CodeGenerator.Expression.hasOwnProperty(node.type); |
| } |
| |
| // Generation is done by generateStatement. |
| function isStatement(node) { |
| return CodeGenerator.Statement.hasOwnProperty(node.type); |
| } |
| |
| Precedence = { |
| Sequence: 0, |
| Yield: 1, |
| Assignment: 1, |
| Conditional: 2, |
| ArrowFunction: 2, |
| LogicalOR: 3, |
| LogicalAND: 4, |
| BitwiseOR: 5, |
| BitwiseXOR: 6, |
| BitwiseAND: 7, |
| Equality: 8, |
| Relational: 9, |
| BitwiseSHIFT: 10, |
| Additive: 11, |
| Multiplicative: 12, |
| Await: 13, |
| Unary: 13, |
| Postfix: 14, |
| Call: 15, |
| New: 16, |
| TaggedTemplate: 17, |
| Member: 18, |
| Primary: 19 |
| }; |
| |
| BinaryPrecedence = { |
| '||': Precedence.LogicalOR, |
| '&&': Precedence.LogicalAND, |
| '|': Precedence.BitwiseOR, |
| '^': Precedence.BitwiseXOR, |
| '&': Precedence.BitwiseAND, |
| '==': Precedence.Equality, |
| '!=': Precedence.Equality, |
| '===': Precedence.Equality, |
| '!==': Precedence.Equality, |
| 'is': Precedence.Equality, |
| 'isnt': Precedence.Equality, |
| '<': Precedence.Relational, |
| '>': Precedence.Relational, |
| '<=': Precedence.Relational, |
| '>=': Precedence.Relational, |
| 'in': Precedence.Relational, |
| 'instanceof': Precedence.Relational, |
| '<<': Precedence.BitwiseSHIFT, |
| '>>': Precedence.BitwiseSHIFT, |
| '>>>': Precedence.BitwiseSHIFT, |
| '+': Precedence.Additive, |
| '-': Precedence.Additive, |
| '*': Precedence.Multiplicative, |
| '%': Precedence.Multiplicative, |
| '/': Precedence.Multiplicative |
| }; |
| |
| //Flags |
| var F_ALLOW_IN = 1, |
| F_ALLOW_CALL = 1 << 1, |
| F_ALLOW_UNPARATH_NEW = 1 << 2, |
| F_FUNC_BODY = 1 << 3, |
| F_DIRECTIVE_CTX = 1 << 4, |
| F_SEMICOLON_OPT = 1 << 5; |
| |
| //Expression flag sets |
| //NOTE: Flag order: |
| // F_ALLOW_IN |
| // F_ALLOW_CALL |
| // F_ALLOW_UNPARATH_NEW |
| var E_FTT = F_ALLOW_CALL | F_ALLOW_UNPARATH_NEW, |
| E_TTF = F_ALLOW_IN | F_ALLOW_CALL, |
| E_TTT = F_ALLOW_IN | F_ALLOW_CALL | F_ALLOW_UNPARATH_NEW, |
| E_TFF = F_ALLOW_IN, |
| E_FFT = F_ALLOW_UNPARATH_NEW, |
| E_TFT = F_ALLOW_IN | F_ALLOW_UNPARATH_NEW; |
| |
| //Statement flag sets |
| //NOTE: Flag order: |
| // F_ALLOW_IN |
| // F_FUNC_BODY |
| // F_DIRECTIVE_CTX |
| // F_SEMICOLON_OPT |
| var S_TFFF = F_ALLOW_IN, |
| S_TFFT = F_ALLOW_IN | F_SEMICOLON_OPT, |
| S_FFFF = 0x00, |
| S_TFTF = F_ALLOW_IN | F_DIRECTIVE_CTX, |
| S_TTFF = F_ALLOW_IN | F_FUNC_BODY; |
| |
| function getDefaultOptions() { |
| // default options |
| return { |
| indent: null, |
| base: null, |
| parse: null, |
| comment: false, |
| format: { |
| indent: { |
| style: ' ', |
| base: 0, |
| adjustMultilineComment: false |
| }, |
| newline: '\n', |
| space: ' ', |
| json: false, |
| renumber: false, |
| hexadecimal: false, |
| quotes: 'single', |
| escapeless: false, |
| compact: false, |
| parentheses: true, |
| semicolons: true, |
| safeConcatenation: false, |
| preserveBlankLines: false |
| }, |
| moz: { |
| comprehensionExpressionStartsWithAssignment: false, |
| starlessGenerator: false |
| }, |
| sourceMap: null, |
| sourceMapRoot: null, |
| sourceMapWithCode: false, |
| directive: false, |
| raw: true, |
| verbatim: null, |
| sourceCode: null |
| }; |
| } |
| |
| function stringRepeat(str, num) { |
| var result = ''; |
| |
| for (num |= 0; num > 0; num >>>= 1, str += str) { |
| if (num & 1) { |
| result += str; |
| } |
| } |
| |
| return result; |
| } |
| |
| function hasLineTerminator(str) { |
| return (/[\r\n]/g).test(str); |
| } |
| |
| function endsWithLineTerminator(str) { |
| var len = str.length; |
| return len && esutils.code.isLineTerminator(str.charCodeAt(len - 1)); |
| } |
| |
| function merge(target, override) { |
| var key; |
| for (key in override) { |
| if (override.hasOwnProperty(key)) { |
| target[key] = override[key]; |
| } |
| } |
| return target; |
| } |
| |
| function updateDeeply(target, override) { |
| var key, val; |
| |
| function isHashObject(target) { |
| return typeof target === 'object' && target instanceof Object && !(target instanceof RegExp); |
| } |
| |
| for (key in override) { |
| if (override.hasOwnProperty(key)) { |
| val = override[key]; |
| if (isHashObject(val)) { |
| if (isHashObject(target[key])) { |
| updateDeeply(target[key], val); |
| } else { |
| target[key] = updateDeeply({}, val); |
| } |
| } else { |
| target[key] = val; |
| } |
| } |
| } |
| return target; |
| } |
| |
| function generateNumber(value) { |
| var result, point, temp, exponent, pos; |
| |
| if (value !== value) { |
| throw new Error('Numeric literal whose value is NaN'); |
| } |
| if (value < 0 || (value === 0 && 1 / value < 0)) { |
| throw new Error('Numeric literal whose value is negative'); |
| } |
| |
| if (value === 1 / 0) { |
| return json ? 'null' : renumber ? '1e400' : '1e+400'; |
| } |
| |
| result = '' + value; |
| if (!renumber || result.length < 3) { |
| return result; |
| } |
| |
| point = result.indexOf('.'); |
| if (!json && result.charCodeAt(0) === 0x30 /* 0 */ && point === 1) { |
| point = 0; |
| result = result.slice(1); |
| } |
| temp = result; |
| result = result.replace('e+', 'e'); |
| exponent = 0; |
| if ((pos = temp.indexOf('e')) > 0) { |
| exponent = +temp.slice(pos + 1); |
| temp = temp.slice(0, pos); |
| } |
| if (point >= 0) { |
| exponent -= temp.length - point - 1; |
| temp = +(temp.slice(0, point) + temp.slice(point + 1)) + ''; |
| } |
| pos = 0; |
| while (temp.charCodeAt(temp.length + pos - 1) === 0x30 /* 0 */) { |
| --pos; |
| } |
| if (pos !== 0) { |
| exponent -= pos; |
| temp = temp.slice(0, pos); |
| } |
| if (exponent !== 0) { |
| temp += 'e' + exponent; |
| } |
| if ((temp.length < result.length || |
| (hexadecimal && value > 1e12 && Math.floor(value) === value && (temp = '0x' + value.toString(16)).length < result.length)) && |
| +temp === value) { |
| result = temp; |
| } |
| |
| return result; |
| } |
| |
| // Generate valid RegExp expression. |
| // This function is based on https://github.com/Constellation/iv Engine |
| |
| function escapeRegExpCharacter(ch, previousIsBackslash) { |
| // not handling '\' and handling \u2028 or \u2029 to unicode escape sequence |
| if ((ch & ~1) === 0x2028) { |
| return (previousIsBackslash ? 'u' : '\\u') + ((ch === 0x2028) ? '2028' : '2029'); |
| } else if (ch === 10 || ch === 13) { // \n, \r |
| return (previousIsBackslash ? '' : '\\') + ((ch === 10) ? 'n' : 'r'); |
| } |
| return String.fromCharCode(ch); |
| } |
| |
| function generateRegExp(reg) { |
| var match, result, flags, i, iz, ch, characterInBrack, previousIsBackslash; |
| |
| result = reg.toString(); |
| |
| if (reg.source) { |
| // extract flag from toString result |
| match = result.match(/\/([^/]*)$/); |
| if (!match) { |
| return result; |
| } |
| |
| flags = match[1]; |
| result = ''; |
| |
| characterInBrack = false; |
| previousIsBackslash = false; |
| for (i = 0, iz = reg.source.length; i < iz; ++i) { |
| ch = reg.source.charCodeAt(i); |
| |
| if (!previousIsBackslash) { |
| if (characterInBrack) { |
| if (ch === 93) { // ] |
| characterInBrack = false; |
| } |
| } else { |
| if (ch === 47) { // / |
| result += '\\'; |
| } else if (ch === 91) { // [ |
| characterInBrack = true; |
| } |
| } |
| result += escapeRegExpCharacter(ch, previousIsBackslash); |
| previousIsBackslash = ch === 92; // \ |
| } else { |
| // if new RegExp("\\\n') is provided, create /\n/ |
| result += escapeRegExpCharacter(ch, previousIsBackslash); |
| // prevent like /\\[/]/ |
| previousIsBackslash = false; |
| } |
| } |
| |
| return '/' + result + '/' + flags; |
| } |
| |
| return result; |
| } |
| |
| function escapeAllowedCharacter(code, next) { |
| var hex; |
| |
| if (code === 0x08 /* \b */) { |
| return '\\b'; |
| } |
| |
| if (code === 0x0C /* \f */) { |
| return '\\f'; |
| } |
| |
| if (code === 0x09 /* \t */) { |
| return '\\t'; |
| } |
| |
| hex = code.toString(16).toUpperCase(); |
| if (json || code > 0xFF) { |
| return '\\u' + '0000'.slice(hex.length) + hex; |
| } else if (code === 0x0000 && !esutils.code.isDecimalDigit(next)) { |
| return '\\0'; |
| } else if (code === 0x000B /* \v */) { // '\v' |
| return '\\x0B'; |
| } else { |
| return '\\x' + '00'.slice(hex.length) + hex; |
| } |
| } |
| |
| function escapeDisallowedCharacter(code) { |
| if (code === 0x5C /* \ */) { |
| return '\\\\'; |
| } |
| |
| if (code === 0x0A /* \n */) { |
| return '\\n'; |
| } |
| |
| if (code === 0x0D /* \r */) { |
| return '\\r'; |
| } |
| |
| if (code === 0x2028) { |
| return '\\u2028'; |
| } |
| |
| if (code === 0x2029) { |
| return '\\u2029'; |
| } |
| |
| throw new Error('Incorrectly classified character'); |
| } |
| |
| function escapeDirective(str) { |
| var i, iz, code, quote; |
| |
| quote = quotes === 'double' ? '"' : '\''; |
| for (i = 0, iz = str.length; i < iz; ++i) { |
| code = str.charCodeAt(i); |
| if (code === 0x27 /* ' */) { |
| quote = '"'; |
| break; |
| } else if (code === 0x22 /* " */) { |
| quote = '\''; |
| break; |
| } else if (code === 0x5C /* \ */) { |
| ++i; |
| } |
| } |
| |
| return quote + str + quote; |
| } |
| |
| function escapeString(str) { |
| var result = '', i, len, code, singleQuotes = 0, doubleQuotes = 0, single, quote; |
| |
| for (i = 0, len = str.length; i < len; ++i) { |
| code = str.charCodeAt(i); |
| if (code === 0x27 /* ' */) { |
| ++singleQuotes; |
| } else if (code === 0x22 /* " */) { |
| ++doubleQuotes; |
| } else if (code === 0x2F /* / */ && json) { |
| result += '\\'; |
| } else if (esutils.code.isLineTerminator(code) || code === 0x5C /* \ */) { |
| result += escapeDisallowedCharacter(code); |
| continue; |
| } else if (!esutils.code.isIdentifierPartES5(code) && (json && code < 0x20 /* SP */ || !json && !escapeless && (code < 0x20 /* SP */ || code > 0x7E /* ~ */))) { |
| result += escapeAllowedCharacter(code, str.charCodeAt(i + 1)); |
| continue; |
| } |
| result += String.fromCharCode(code); |
| } |
| |
| single = !(quotes === 'double' || (quotes === 'auto' && doubleQuotes < singleQuotes)); |
| quote = single ? '\'' : '"'; |
| |
| if (!(single ? singleQuotes : doubleQuotes)) { |
| return quote + result + quote; |
| } |
| |
| str = result; |
| result = quote; |
| |
| for (i = 0, len = str.length; i < len; ++i) { |
| code = str.charCodeAt(i); |
| if ((code === 0x27 /* ' */ && single) || (code === 0x22 /* " */ && !single)) { |
| result += '\\'; |
| } |
| result += String.fromCharCode(code); |
| } |
| |
| return result + quote; |
| } |
| |
| /** |
| * flatten an array to a string, where the array can contain |
| * either strings or nested arrays |
| */ |
| function flattenToString(arr) { |
| var i, iz, elem, result = ''; |
| for (i = 0, iz = arr.length; i < iz; ++i) { |
| elem = arr[i]; |
| result += Array.isArray(elem) ? flattenToString(elem) : elem; |
| } |
| return result; |
| } |
| |
| /** |
| * convert generated to a SourceNode when source maps are enabled. |
| */ |
| function toSourceNodeWhenNeeded(generated, node) { |
| if (!sourceMap) { |
| // with no source maps, generated is either an |
| // array or a string. if an array, flatten it. |
| // if a string, just return it |
| if (Array.isArray(generated)) { |
| return flattenToString(generated); |
| } else { |
| return generated; |
| } |
| } |
| if (node == null) { |
| if (generated instanceof SourceNode) { |
| return generated; |
| } else { |
| node = {}; |
| } |
| } |
| if (node.loc == null) { |
| return new SourceNode(null, null, sourceMap, generated, node.name || null); |
| } |
| return new SourceNode(node.loc.start.line, node.loc.start.column, (sourceMap === true ? node.loc.source || null : sourceMap), generated, node.name || null); |
| } |
| |
| function noEmptySpace() { |
| return (space) ? space : ' '; |
| } |
| |
| function join(left, right) { |
| var leftSource, |
| rightSource, |
| leftCharCode, |
| rightCharCode; |
| |
| leftSource = toSourceNodeWhenNeeded(left).toString(); |
| if (leftSource.length === 0) { |
| return [right]; |
| } |
| |
| rightSource = toSourceNodeWhenNeeded(right).toString(); |
| if (rightSource.length === 0) { |
| return [left]; |
| } |
| |
| leftCharCode = leftSource.charCodeAt(leftSource.length - 1); |
| rightCharCode = rightSource.charCodeAt(0); |
| |
| if ((leftCharCode === 0x2B /* + */ || leftCharCode === 0x2D /* - */) && leftCharCode === rightCharCode || |
| esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode) || |
| leftCharCode === 0x2F /* / */ && rightCharCode === 0x69 /* i */) { // infix word operators all start with `i` |
| return [left, noEmptySpace(), right]; |
| } else if (esutils.code.isWhiteSpace(leftCharCode) || esutils.code.isLineTerminator(leftCharCode) || |
| esutils.code.isWhiteSpace(rightCharCode) || esutils.code.isLineTerminator(rightCharCode)) { |
| return [left, right]; |
| } |
| return [left, space, right]; |
| } |
| |
| function addIndent(stmt) { |
| return [base, stmt]; |
| } |
| |
| function withIndent(fn) { |
| var previousBase; |
| previousBase = base; |
| base += indent; |
| fn(base); |
| base = previousBase; |
| } |
| |
| function calculateSpaces(str) { |
| var i; |
| for (i = str.length - 1; i >= 0; --i) { |
| if (esutils.code.isLineTerminator(str.charCodeAt(i))) { |
| break; |
| } |
| } |
| return (str.length - 1) - i; |
| } |
| |
| function adjustMultilineComment(value, specialBase) { |
| var array, i, len, line, j, spaces, previousBase, sn; |
| |
| array = value.split(/\r\n|[\r\n]/); |
| spaces = Number.MAX_VALUE; |
| |
| // first line doesn't have indentation |
| for (i = 1, len = array.length; i < len; ++i) { |
| line = array[i]; |
| j = 0; |
| while (j < line.length && esutils.code.isWhiteSpace(line.charCodeAt(j))) { |
| ++j; |
| } |
| if (spaces > j) { |
| spaces = j; |
| } |
| } |
| |
| if (typeof specialBase !== 'undefined') { |
| // pattern like |
| // { |
| // var t = 20; /* |
| // * this is comment |
| // */ |
| // } |
| previousBase = base; |
| if (array[1][spaces] === '*') { |
| specialBase += ' '; |
| } |
| base = specialBase; |
| } else { |
| if (spaces & 1) { |
| // /* |
| // * |
| // */ |
| // If spaces are odd number, above pattern is considered. |
| // We waste 1 space. |
| --spaces; |
| } |
| previousBase = base; |
| } |
| |
| for (i = 1, len = array.length; i < len; ++i) { |
| sn = toSourceNodeWhenNeeded(addIndent(array[i].slice(spaces))); |
| array[i] = sourceMap ? sn.join('') : sn; |
| } |
| |
| base = previousBase; |
| |
| return array.join('\n'); |
| } |
| |
| function generateComment(comment, specialBase) { |
| if (comment.type === 'Line') { |
| if (endsWithLineTerminator(comment.value)) { |
| return '//' + comment.value; |
| } else { |
| // Always use LineTerminator |
| var result = '//' + comment.value; |
| if (!preserveBlankLines) { |
| result += '\n'; |
| } |
| return result; |
| } |
| } |
| if (extra.format.indent.adjustMultilineComment && /[\n\r]/.test(comment.value)) { |
| return adjustMultilineComment('/*' + comment.value + '*/', specialBase); |
| } |
| return '/*' + comment.value + '*/'; |
| } |
| |
| function addComments(stmt, result) { |
| var i, len, comment, save, tailingToStatement, specialBase, fragment, |
| extRange, range, prevRange, prefix, infix, suffix, count; |
| |
| if (stmt.leadingComments && stmt.leadingComments.length > 0) { |
| save = result; |
| |
| if (preserveBlankLines) { |
| comment = stmt.leadingComments[0]; |
| result = []; |
| |
| extRange = comment.extendedRange; |
| range = comment.range; |
| |
| prefix = sourceCode.substring(extRange[0], range[0]); |
| count = (prefix.match(/\n/g) || []).length; |
| if (count > 0) { |
| result.push(stringRepeat('\n', count)); |
| result.push(addIndent(generateComment(comment))); |
| } else { |
| result.push(prefix); |
| result.push(generateComment(comment)); |
| } |
| |
| prevRange = range; |
| |
| for (i = 1, len = stmt.leadingComments.length; i < len; i++) { |
| comment = stmt.leadingComments[i]; |
| range = comment.range; |
| |
| infix = sourceCode.substring(prevRange[1], range[0]); |
| count = (infix.match(/\n/g) || []).length; |
| result.push(stringRepeat('\n', count)); |
| result.push(addIndent(generateComment(comment))); |
| |
| prevRange = range; |
| } |
| |
| suffix = sourceCode.substring(range[1], extRange[1]); |
| count = (suffix.match(/\n/g) || []).length; |
| result.push(stringRepeat('\n', count)); |
| } else { |
| comment = stmt.leadingComments[0]; |
| result = []; |
| if (safeConcatenation && stmt.type === Syntax.Program && stmt.body.length === 0) { |
| result.push('\n'); |
| } |
| result.push(generateComment(comment)); |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push('\n'); |
| } |
| |
| for (i = 1, len = stmt.leadingComments.length; i < len; ++i) { |
| comment = stmt.leadingComments[i]; |
| fragment = [generateComment(comment)]; |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| fragment.push('\n'); |
| } |
| result.push(addIndent(fragment)); |
| } |
| } |
| |
| result.push(addIndent(save)); |
| } |
| |
| if (stmt.trailingComments) { |
| |
| if (preserveBlankLines) { |
| comment = stmt.trailingComments[0]; |
| extRange = comment.extendedRange; |
| range = comment.range; |
| |
| prefix = sourceCode.substring(extRange[0], range[0]); |
| count = (prefix.match(/\n/g) || []).length; |
| |
| if (count > 0) { |
| result.push(stringRepeat('\n', count)); |
| result.push(addIndent(generateComment(comment))); |
| } else { |
| result.push(prefix); |
| result.push(generateComment(comment)); |
| } |
| } else { |
| tailingToStatement = !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString()); |
| specialBase = stringRepeat(' ', calculateSpaces(toSourceNodeWhenNeeded([base, result, indent]).toString())); |
| for (i = 0, len = stmt.trailingComments.length; i < len; ++i) { |
| comment = stmt.trailingComments[i]; |
| if (tailingToStatement) { |
| // We assume target like following script |
| // |
| // var t = 20; /** |
| // * This is comment of t |
| // */ |
| if (i === 0) { |
| // first case |
| result = [result, indent]; |
| } else { |
| result = [result, specialBase]; |
| } |
| result.push(generateComment(comment, specialBase)); |
| } else { |
| result = [result, addIndent(generateComment(comment))]; |
| } |
| if (i !== len - 1 && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result = [result, '\n']; |
| } |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| function generateBlankLines(start, end, result) { |
| var j, newlineCount = 0; |
| |
| for (j = start; j < end; j++) { |
| if (sourceCode[j] === '\n') { |
| newlineCount++; |
| } |
| } |
| |
| for (j = 1; j < newlineCount; j++) { |
| result.push(newline); |
| } |
| } |
| |
| function parenthesize(text, current, should) { |
| if (current < should) { |
| return ['(', text, ')']; |
| } |
| return text; |
| } |
| |
| function generateVerbatimString(string) { |
| var i, iz, result; |
| result = string.split(/\r\n|\n/); |
| for (i = 1, iz = result.length; i < iz; i++) { |
| result[i] = newline + base + result[i]; |
| } |
| return result; |
| } |
| |
| function generateVerbatim(expr, precedence) { |
| var verbatim, result, prec; |
| verbatim = expr[extra.verbatim]; |
| |
| if (typeof verbatim === 'string') { |
| result = parenthesize(generateVerbatimString(verbatim), Precedence.Sequence, precedence); |
| } else { |
| // verbatim is object |
| result = generateVerbatimString(verbatim.content); |
| prec = (verbatim.precedence != null) ? verbatim.precedence : Precedence.Sequence; |
| result = parenthesize(result, prec, precedence); |
| } |
| |
| return toSourceNodeWhenNeeded(result, expr); |
| } |
| |
| function CodeGenerator() { |
| } |
| |
| // Helpers. |
| |
| CodeGenerator.prototype.maybeBlock = function(stmt, flags) { |
| var result, noLeadingComment, that = this; |
| |
| noLeadingComment = !extra.comment || !stmt.leadingComments; |
| |
| if (stmt.type === Syntax.BlockStatement && noLeadingComment) { |
| return [space, this.generateStatement(stmt, flags)]; |
| } |
| |
| if (stmt.type === Syntax.EmptyStatement && noLeadingComment) { |
| return ';'; |
| } |
| |
| withIndent(function () { |
| result = [ |
| newline, |
| addIndent(that.generateStatement(stmt, flags)) |
| ]; |
| }); |
| |
| return result; |
| }; |
| |
| CodeGenerator.prototype.maybeBlockSuffix = function (stmt, result) { |
| var ends = endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString()); |
| if (stmt.type === Syntax.BlockStatement && (!extra.comment || !stmt.leadingComments) && !ends) { |
| return [result, space]; |
| } |
| if (ends) { |
| return [result, base]; |
| } |
| return [result, newline, base]; |
| }; |
| |
| function generateIdentifier(node) { |
| return toSourceNodeWhenNeeded(node.name, node); |
| } |
| |
| function generateAsyncPrefix(node, spaceRequired) { |
| return node.async ? 'async' + (spaceRequired ? noEmptySpace() : space) : ''; |
| } |
| |
| function generateStarSuffix(node) { |
| var isGenerator = node.generator && !extra.moz.starlessGenerator; |
| return isGenerator ? '*' + space : ''; |
| } |
| |
| function generateMethodPrefix(prop) { |
| var func = prop.value, prefix = ''; |
| if (func.async) { |
| prefix += generateAsyncPrefix(func, !prop.computed); |
| } |
| if (func.generator) { |
| // avoid space before method name |
| prefix += generateStarSuffix(func) ? '*' : ''; |
| } |
| return prefix; |
| } |
| |
| CodeGenerator.prototype.generatePattern = function (node, precedence, flags) { |
| if (node.type === Syntax.Identifier) { |
| return generateIdentifier(node); |
| } |
| return this.generateExpression(node, precedence, flags); |
| }; |
| |
| CodeGenerator.prototype.generateFunctionParams = function (node) { |
| var i, iz, result, hasDefault; |
| |
| hasDefault = false; |
| |
| if (node.type === Syntax.ArrowFunctionExpression && |
| !node.rest && (!node.defaults || node.defaults.length === 0) && |
| node.params.length === 1 && node.params[0].type === Syntax.Identifier) { |
| // arg => { } case |
| result = [generateAsyncPrefix(node, true), generateIdentifier(node.params[0])]; |
| } else { |
| result = node.type === Syntax.ArrowFunctionExpression ? [generateAsyncPrefix(node, false)] : []; |
| result.push('('); |
| if (node.defaults) { |
| hasDefault = true; |
| } |
| for (i = 0, iz = node.params.length; i < iz; ++i) { |
| if (hasDefault && node.defaults[i]) { |
| // Handle default values. |
| result.push(this.generateAssignment(node.params[i], node.defaults[i], '=', Precedence.Assignment, E_TTT)); |
| } else { |
| result.push(this.generatePattern(node.params[i], Precedence.Assignment, E_TTT)); |
| } |
| if (i + 1 < iz) { |
| result.push(',' + space); |
| } |
| } |
| |
| if (node.rest) { |
| if (node.params.length) { |
| result.push(',' + space); |
| } |
| result.push('...'); |
| result.push(generateIdentifier(node.rest)); |
| } |
| |
| result.push(')'); |
| } |
| |
| return result; |
| }; |
| |
| CodeGenerator.prototype.generateFunctionBody = function (node) { |
| var result, expr; |
| |
| result = this.generateFunctionParams(node); |
| |
| if (node.type === Syntax.ArrowFunctionExpression) { |
| result.push(space); |
| result.push('=>'); |
| } |
| |
| if (node.expression) { |
| result.push(space); |
| expr = this.generateExpression(node.body, Precedence.Assignment, E_TTT); |
| if (expr.toString().charAt(0) === '{') { |
| expr = ['(', expr, ')']; |
| } |
| result.push(expr); |
| } else { |
| result.push(this.maybeBlock(node.body, S_TTFF)); |
| } |
| |
| return result; |
| }; |
| |
| CodeGenerator.prototype.generateIterationForStatement = function (operator, stmt, flags) { |
| var result = ['for' + space + (stmt.await ? 'await' + space : '') + '('], that = this; |
| withIndent(function () { |
| if (stmt.left.type === Syntax.VariableDeclaration) { |
| withIndent(function () { |
| result.push(stmt.left.kind + noEmptySpace()); |
| result.push(that.generateStatement(stmt.left.declarations[0], S_FFFF)); |
| }); |
| } else { |
| result.push(that.generateExpression(stmt.left, Precedence.Call, E_TTT)); |
| } |
| |
| result = join(result, operator); |
| result = [join( |
| result, |
| that.generateExpression(stmt.right, Precedence.Assignment, E_TTT) |
| ), ')']; |
| }); |
| result.push(this.maybeBlock(stmt.body, flags)); |
| return result; |
| }; |
| |
| CodeGenerator.prototype.generatePropertyKey = function (expr, computed) { |
| var result = []; |
| |
| if (computed) { |
| result.push('['); |
| } |
| |
| result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); |
| |
| if (computed) { |
| result.push(']'); |
| } |
| |
| return result; |
| }; |
| |
| CodeGenerator.prototype.generateAssignment = function (left, right, operator, precedence, flags) { |
| if (Precedence.Assignment < precedence) { |
| flags |= F_ALLOW_IN; |
| } |
| |
| return parenthesize( |
| [ |
| this.generateExpression(left, Precedence.Call, flags), |
| space + operator + space, |
| this.generateExpression(right, Precedence.Assignment, flags) |
| ], |
| Precedence.Assignment, |
| precedence |
| ); |
| }; |
| |
| CodeGenerator.prototype.semicolon = function (flags) { |
| if (!semicolons && flags & F_SEMICOLON_OPT) { |
| return ''; |
| } |
| return ';'; |
| }; |
| |
| // Statements. |
| |
| CodeGenerator.Statement = { |
| |
| BlockStatement: function (stmt, flags) { |
| var range, content, result = ['{', newline], that = this; |
| |
| withIndent(function () { |
| // handle functions without any code |
| if (stmt.body.length === 0 && preserveBlankLines) { |
| range = stmt.range; |
| if (range[1] - range[0] > 2) { |
| content = sourceCode.substring(range[0] + 1, range[1] - 1); |
| if (content[0] === '\n') { |
| result = ['{']; |
| } |
| result.push(content); |
| } |
| } |
| |
| var i, iz, fragment, bodyFlags; |
| bodyFlags = S_TFFF; |
| if (flags & F_FUNC_BODY) { |
| bodyFlags |= F_DIRECTIVE_CTX; |
| } |
| |
| for (i = 0, iz = stmt.body.length; i < iz; ++i) { |
| if (preserveBlankLines) { |
| // handle spaces before the first line |
| if (i === 0) { |
| if (stmt.body[0].leadingComments) { |
| range = stmt.body[0].leadingComments[0].extendedRange; |
| content = sourceCode.substring(range[0], range[1]); |
| if (content[0] === '\n') { |
| result = ['{']; |
| } |
| } |
| if (!stmt.body[0].leadingComments) { |
| generateBlankLines(stmt.range[0], stmt.body[0].range[0], result); |
| } |
| } |
| |
| // handle spaces between lines |
| if (i > 0) { |
| if (!stmt.body[i - 1].trailingComments && !stmt.body[i].leadingComments) { |
| generateBlankLines(stmt.body[i - 1].range[1], stmt.body[i].range[0], result); |
| } |
| } |
| } |
| |
| if (i === iz - 1) { |
| bodyFlags |= F_SEMICOLON_OPT; |
| } |
| |
| if (stmt.body[i].leadingComments && preserveBlankLines) { |
| fragment = that.generateStatement(stmt.body[i], bodyFlags); |
| } else { |
| fragment = addIndent(that.generateStatement(stmt.body[i], bodyFlags)); |
| } |
| |
| result.push(fragment); |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| if (preserveBlankLines && i < iz - 1) { |
| // don't add a new line if there are leading coments |
| // in the next statement |
| if (!stmt.body[i + 1].leadingComments) { |
| result.push(newline); |
| } |
| } else { |
| result.push(newline); |
| } |
| } |
| |
| if (preserveBlankLines) { |
| // handle spaces after the last line |
| if (i === iz - 1) { |
| if (!stmt.body[i].trailingComments) { |
| generateBlankLines(stmt.body[i].range[1], stmt.range[1], result); |
| } |
| } |
| } |
| } |
| }); |
| |
| result.push(addIndent('}')); |
| return result; |
| }, |
| |
| BreakStatement: function (stmt, flags) { |
| if (stmt.label) { |
| return 'break ' + stmt.label.name + this.semicolon(flags); |
| } |
| return 'break' + this.semicolon(flags); |
| }, |
| |
| ContinueStatement: function (stmt, flags) { |
| if (stmt.label) { |
| return 'continue ' + stmt.label.name + this.semicolon(flags); |
| } |
| return 'continue' + this.semicolon(flags); |
| }, |
| |
| ClassBody: function (stmt, flags) { |
| var result = [ '{', newline], that = this; |
| |
| withIndent(function (indent) { |
| var i, iz; |
| |
| for (i = 0, iz = stmt.body.length; i < iz; ++i) { |
| result.push(indent); |
| result.push(that.generateExpression(stmt.body[i], Precedence.Sequence, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(newline); |
| } |
| } |
| }); |
| |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(base); |
| result.push('}'); |
| return result; |
| }, |
| |
| ClassDeclaration: function (stmt, flags) { |
| var result, fragment; |
| result = ['class']; |
| if (stmt.id) { |
| result = join(result, this.generateExpression(stmt.id, Precedence.Sequence, E_TTT)); |
| } |
| if (stmt.superClass) { |
| fragment = join('extends', this.generateExpression(stmt.superClass, Precedence.Assignment, E_TTT)); |
| result = join(result, fragment); |
| } |
| result.push(space); |
| result.push(this.generateStatement(stmt.body, S_TFFT)); |
| return result; |
| }, |
| |
| DirectiveStatement: function (stmt, flags) { |
| if (extra.raw && stmt.raw) { |
| return stmt.raw + this.semicolon(flags); |
| } |
| return escapeDirective(stmt.directive) + this.semicolon(flags); |
| }, |
| |
| DoWhileStatement: function (stmt, flags) { |
| // Because `do 42 while (cond)` is Syntax Error. We need semicolon. |
| var result = join('do', this.maybeBlock(stmt.body, S_TFFF)); |
| result = this.maybeBlockSuffix(stmt.body, result); |
| return join(result, [ |
| 'while' + space + '(', |
| this.generateExpression(stmt.test, Precedence.Sequence, E_TTT), |
| ')' + this.semicolon(flags) |
| ]); |
| }, |
| |
| CatchClause: function (stmt, flags) { |
| var result, that = this; |
| withIndent(function () { |
| var guard; |
| |
| result = [ |
| 'catch' + space + '(', |
| that.generateExpression(stmt.param, Precedence.Sequence, E_TTT), |
| ')' |
| ]; |
| |
| if (stmt.guard) { |
| guard = that.generateExpression(stmt.guard, Precedence.Sequence, E_TTT); |
| result.splice(2, 0, ' if ', guard); |
| } |
| }); |
| result.push(this.maybeBlock(stmt.body, S_TFFF)); |
| return result; |
| }, |
| |
| DebuggerStatement: function (stmt, flags) { |
| return 'debugger' + this.semicolon(flags); |
| }, |
| |
| EmptyStatement: function (stmt, flags) { |
| return ';'; |
| }, |
| |
| ExportDefaultDeclaration: function (stmt, flags) { |
| var result = [ 'export' ], bodyFlags; |
| |
| bodyFlags = (flags & F_SEMICOLON_OPT) ? S_TFFT : S_TFFF; |
| |
| // export default HoistableDeclaration[Default] |
| // export default AssignmentExpression[In] ; |
| result = join(result, 'default'); |
| if (isStatement(stmt.declaration)) { |
| result = join(result, this.generateStatement(stmt.declaration, bodyFlags)); |
| } else { |
| result = join(result, this.generateExpression(stmt.declaration, Precedence.Assignment, E_TTT) + this.semicolon(flags)); |
| } |
| return result; |
| }, |
| |
| ExportNamedDeclaration: function (stmt, flags) { |
| var result = [ 'export' ], bodyFlags, that = this; |
| |
| bodyFlags = (flags & F_SEMICOLON_OPT) ? S_TFFT : S_TFFF; |
| |
| // export VariableStatement |
| // export Declaration[Default] |
| if (stmt.declaration) { |
| return join(result, this.generateStatement(stmt.declaration, bodyFlags)); |
| } |
| |
| // export ExportClause[NoReference] FromClause ; |
| // export ExportClause ; |
| if (stmt.specifiers) { |
| if (stmt.specifiers.length === 0) { |
| result = join(result, '{' + space + '}'); |
| } else if (stmt.specifiers[0].type === Syntax.ExportBatchSpecifier) { |
| result = join(result, this.generateExpression(stmt.specifiers[0], Precedence.Sequence, E_TTT)); |
| } else { |
| result = join(result, '{'); |
| withIndent(function (indent) { |
| var i, iz; |
| result.push(newline); |
| for (i = 0, iz = stmt.specifiers.length; i < iz; ++i) { |
| result.push(indent); |
| result.push(that.generateExpression(stmt.specifiers[i], Precedence.Sequence, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + newline); |
| } |
| } |
| }); |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(base + '}'); |
| } |
| |
| if (stmt.source) { |
| result = join(result, [ |
| 'from' + space, |
| // ModuleSpecifier |
| this.generateExpression(stmt.source, Precedence.Sequence, E_TTT), |
| this.semicolon(flags) |
| ]); |
| } else { |
| result.push(this.semicolon(flags)); |
| } |
| } |
| return result; |
| }, |
| |
| ExportAllDeclaration: function (stmt, flags) { |
| // export * FromClause ; |
| return [ |
| 'export' + space, |
| '*' + space, |
| 'from' + space, |
| // ModuleSpecifier |
| this.generateExpression(stmt.source, Precedence.Sequence, E_TTT), |
| this.semicolon(flags) |
| ]; |
| }, |
| |
| ExpressionStatement: function (stmt, flags) { |
| var result, fragment; |
| |
| function isClassPrefixed(fragment) { |
| var code; |
| if (fragment.slice(0, 5) !== 'class') { |
| return false; |
| } |
| code = fragment.charCodeAt(5); |
| return code === 0x7B /* '{' */ || esutils.code.isWhiteSpace(code) || esutils.code.isLineTerminator(code); |
| } |
| |
| function isFunctionPrefixed(fragment) { |
| var code; |
| if (fragment.slice(0, 8) !== 'function') { |
| return false; |
| } |
| code = fragment.charCodeAt(8); |
| return code === 0x28 /* '(' */ || esutils.code.isWhiteSpace(code) || code === 0x2A /* '*' */ || esutils.code.isLineTerminator(code); |
| } |
| |
| function isAsyncPrefixed(fragment) { |
| var code, i, iz; |
| if (fragment.slice(0, 5) !== 'async') { |
| return false; |
| } |
| if (!esutils.code.isWhiteSpace(fragment.charCodeAt(5))) { |
| return false; |
| } |
| for (i = 6, iz = fragment.length; i < iz; ++i) { |
| if (!esutils.code.isWhiteSpace(fragment.charCodeAt(i))) { |
| break; |
| } |
| } |
| if (i === iz) { |
| return false; |
| } |
| if (fragment.slice(i, i + 8) !== 'function') { |
| return false; |
| } |
| code = fragment.charCodeAt(i + 8); |
| return code === 0x28 /* '(' */ || esutils.code.isWhiteSpace(code) || code === 0x2A /* '*' */ || esutils.code.isLineTerminator(code); |
| } |
| |
| result = [this.generateExpression(stmt.expression, Precedence.Sequence, E_TTT)]; |
| // 12.4 '{', 'function', 'class' is not allowed in this position. |
| // wrap expression with parentheses |
| fragment = toSourceNodeWhenNeeded(result).toString(); |
| if (fragment.charCodeAt(0) === 0x7B /* '{' */ || // ObjectExpression |
| isClassPrefixed(fragment) || |
| isFunctionPrefixed(fragment) || |
| isAsyncPrefixed(fragment) || |
| (directive && (flags & F_DIRECTIVE_CTX) && stmt.expression.type === Syntax.Literal && typeof stmt.expression.value === 'string')) { |
| result = ['(', result, ')' + this.semicolon(flags)]; |
| } else { |
| result.push(this.semicolon(flags)); |
| } |
| return result; |
| }, |
| |
| ImportDeclaration: function (stmt, flags) { |
| // ES6: 15.2.1 valid import declarations: |
| // - import ImportClause FromClause ; |
| // - import ModuleSpecifier ; |
| var result, cursor, that = this; |
| |
| // If no ImportClause is present, |
| // this should be `import ModuleSpecifier` so skip `from` |
| // ModuleSpecifier is StringLiteral. |
| if (stmt.specifiers.length === 0) { |
| // import ModuleSpecifier ; |
| return [ |
| 'import', |
| space, |
| // ModuleSpecifier |
| this.generateExpression(stmt.source, Precedence.Sequence, E_TTT), |
| this.semicolon(flags) |
| ]; |
| } |
| |
| // import ImportClause FromClause ; |
| result = [ |
| 'import' |
| ]; |
| cursor = 0; |
| |
| // ImportedBinding |
| if (stmt.specifiers[cursor].type === Syntax.ImportDefaultSpecifier) { |
| result = join(result, [ |
| this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT) |
| ]); |
| ++cursor; |
| } |
| |
| if (stmt.specifiers[cursor]) { |
| if (cursor !== 0) { |
| result.push(','); |
| } |
| |
| if (stmt.specifiers[cursor].type === Syntax.ImportNamespaceSpecifier) { |
| // NameSpaceImport |
| result = join(result, [ |
| space, |
| this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT) |
| ]); |
| } else { |
| // NamedImports |
| result.push(space + '{'); |
| |
| if ((stmt.specifiers.length - cursor) === 1) { |
| // import { ... } from "..."; |
| result.push(space); |
| result.push(this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT)); |
| result.push(space + '}' + space); |
| } else { |
| // import { |
| // ..., |
| // ..., |
| // } from "..."; |
| withIndent(function (indent) { |
| var i, iz; |
| result.push(newline); |
| for (i = cursor, iz = stmt.specifiers.length; i < iz; ++i) { |
| result.push(indent); |
| result.push(that.generateExpression(stmt.specifiers[i], Precedence.Sequence, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + newline); |
| } |
| } |
| }); |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(base + '}' + space); |
| } |
| } |
| } |
| |
| result = join(result, [ |
| 'from' + space, |
| // ModuleSpecifier |
| this.generateExpression(stmt.source, Precedence.Sequence, E_TTT), |
| this.semicolon(flags) |
| ]); |
| return result; |
| }, |
| |
| VariableDeclarator: function (stmt, flags) { |
| var itemFlags = (flags & F_ALLOW_IN) ? E_TTT : E_FTT; |
| if (stmt.init) { |
| return [ |
| this.generateExpression(stmt.id, Precedence.Assignment, itemFlags), |
| space, |
| '=', |
| space, |
| this.generateExpression(stmt.init, Precedence.Assignment, itemFlags) |
| ]; |
| } |
| return this.generatePattern(stmt.id, Precedence.Assignment, itemFlags); |
| }, |
| |
| VariableDeclaration: function (stmt, flags) { |
| // VariableDeclarator is typed as Statement, |
| // but joined with comma (not LineTerminator). |
| // So if comment is attached to target node, we should specialize. |
| var result, i, iz, node, bodyFlags, that = this; |
| |
| result = [ stmt.kind ]; |
| |
| bodyFlags = (flags & F_ALLOW_IN) ? S_TFFF : S_FFFF; |
| |
| function block() { |
| node = stmt.declarations[0]; |
| if (extra.comment && node.leadingComments) { |
| result.push('\n'); |
| result.push(addIndent(that.generateStatement(node, bodyFlags))); |
| } else { |
| result.push(noEmptySpace()); |
| result.push(that.generateStatement(node, bodyFlags)); |
| } |
| |
| for (i = 1, iz = stmt.declarations.length; i < iz; ++i) { |
| node = stmt.declarations[i]; |
| if (extra.comment && node.leadingComments) { |
| result.push(',' + newline); |
| result.push(addIndent(that.generateStatement(node, bodyFlags))); |
| } else { |
| result.push(',' + space); |
| result.push(that.generateStatement(node, bodyFlags)); |
| } |
| } |
| } |
| |
| if (stmt.declarations.length > 1) { |
| withIndent(block); |
| } else { |
| block(); |
| } |
| |
| result.push(this.semicolon(flags)); |
| |
| return result; |
| }, |
| |
| ThrowStatement: function (stmt, flags) { |
| return [join( |
| 'throw', |
| this.generateExpression(stmt.argument, Precedence.Sequence, E_TTT) |
| ), this.semicolon(flags)]; |
| }, |
| |
| TryStatement: function (stmt, flags) { |
| var result, i, iz, guardedHandlers; |
| |
| result = ['try', this.maybeBlock(stmt.block, S_TFFF)]; |
| result = this.maybeBlockSuffix(stmt.block, result); |
| |
| if (stmt.handlers) { |
| // old interface |
| for (i = 0, iz = stmt.handlers.length; i < iz; ++i) { |
| result = join(result, this.generateStatement(stmt.handlers[i], S_TFFF)); |
| if (stmt.finalizer || i + 1 !== iz) { |
| result = this.maybeBlockSuffix(stmt.handlers[i].body, result); |
| } |
| } |
| } else { |
| guardedHandlers = stmt.guardedHandlers || []; |
| |
| for (i = 0, iz = guardedHandlers.length; i < iz; ++i) { |
| result = join(result, this.generateStatement(guardedHandlers[i], S_TFFF)); |
| if (stmt.finalizer || i + 1 !== iz) { |
| result = this.maybeBlockSuffix(guardedHandlers[i].body, result); |
| } |
| } |
| |
| // new interface |
| if (stmt.handler) { |
| if (Array.isArray(stmt.handler)) { |
| for (i = 0, iz = stmt.handler.length; i < iz; ++i) { |
| result = join(result, this.generateStatement(stmt.handler[i], S_TFFF)); |
| if (stmt.finalizer || i + 1 !== iz) { |
| result = this.maybeBlockSuffix(stmt.handler[i].body, result); |
| } |
| } |
| } else { |
| result = join(result, this.generateStatement(stmt.handler, S_TFFF)); |
| if (stmt.finalizer) { |
| result = this.maybeBlockSuffix(stmt.handler.body, result); |
| } |
| } |
| } |
| } |
| if (stmt.finalizer) { |
| result = join(result, ['finally', this.maybeBlock(stmt.finalizer, S_TFFF)]); |
| } |
| return result; |
| }, |
| |
| SwitchStatement: function (stmt, flags) { |
| var result, fragment, i, iz, bodyFlags, that = this; |
| withIndent(function () { |
| result = [ |
| 'switch' + space + '(', |
| that.generateExpression(stmt.discriminant, Precedence.Sequence, E_TTT), |
| ')' + space + '{' + newline |
| ]; |
| }); |
| if (stmt.cases) { |
| bodyFlags = S_TFFF; |
| for (i = 0, iz = stmt.cases.length; i < iz; ++i) { |
| if (i === iz - 1) { |
| bodyFlags |= F_SEMICOLON_OPT; |
| } |
| fragment = addIndent(this.generateStatement(stmt.cases[i], bodyFlags)); |
| result.push(fragment); |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| result.push(newline); |
| } |
| } |
| } |
| result.push(addIndent('}')); |
| return result; |
| }, |
| |
| SwitchCase: function (stmt, flags) { |
| var result, fragment, i, iz, bodyFlags, that = this; |
| withIndent(function () { |
| if (stmt.test) { |
| result = [ |
| join('case', that.generateExpression(stmt.test, Precedence.Sequence, E_TTT)), |
| ':' |
| ]; |
| } else { |
| result = ['default:']; |
| } |
| |
| i = 0; |
| iz = stmt.consequent.length; |
| if (iz && stmt.consequent[0].type === Syntax.BlockStatement) { |
| fragment = that.maybeBlock(stmt.consequent[0], S_TFFF); |
| result.push(fragment); |
| i = 1; |
| } |
| |
| if (i !== iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| |
| bodyFlags = S_TFFF; |
| for (; i < iz; ++i) { |
| if (i === iz - 1 && flags & F_SEMICOLON_OPT) { |
| bodyFlags |= F_SEMICOLON_OPT; |
| } |
| fragment = addIndent(that.generateStatement(stmt.consequent[i], bodyFlags)); |
| result.push(fragment); |
| if (i + 1 !== iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| result.push(newline); |
| } |
| } |
| }); |
| return result; |
| }, |
| |
| IfStatement: function (stmt, flags) { |
| var result, bodyFlags, semicolonOptional, that = this; |
| withIndent(function () { |
| result = [ |
| 'if' + space + '(', |
| that.generateExpression(stmt.test, Precedence.Sequence, E_TTT), |
| ')' |
| ]; |
| }); |
| semicolonOptional = flags & F_SEMICOLON_OPT; |
| bodyFlags = S_TFFF; |
| if (semicolonOptional) { |
| bodyFlags |= F_SEMICOLON_OPT; |
| } |
| if (stmt.alternate) { |
| result.push(this.maybeBlock(stmt.consequent, S_TFFF)); |
| result = this.maybeBlockSuffix(stmt.consequent, result); |
| if (stmt.alternate.type === Syntax.IfStatement) { |
| result = join(result, ['else ', this.generateStatement(stmt.alternate, bodyFlags)]); |
| } else { |
| result = join(result, join('else', this.maybeBlock(stmt.alternate, bodyFlags))); |
| } |
| } else { |
| result.push(this.maybeBlock(stmt.consequent, bodyFlags)); |
| } |
| return result; |
| }, |
| |
| ForStatement: function (stmt, flags) { |
| var result, that = this; |
| withIndent(function () { |
| result = ['for' + space + '(']; |
| if (stmt.init) { |
| if (stmt.init.type === Syntax.VariableDeclaration) { |
| result.push(that.generateStatement(stmt.init, S_FFFF)); |
| } else { |
| // F_ALLOW_IN becomes false. |
| result.push(that.generateExpression(stmt.init, Precedence.Sequence, E_FTT)); |
| result.push(';'); |
| } |
| } else { |
| result.push(';'); |
| } |
| |
| if (stmt.test) { |
| result.push(space); |
| result.push(that.generateExpression(stmt.test, Precedence.Sequence, E_TTT)); |
| result.push(';'); |
| } else { |
| result.push(';'); |
| } |
| |
| if (stmt.update) { |
| result.push(space); |
| result.push(that.generateExpression(stmt.update, Precedence.Sequence, E_TTT)); |
| result.push(')'); |
| } else { |
| result.push(')'); |
| } |
| }); |
| |
| result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF)); |
| return result; |
| }, |
| |
| ForInStatement: function (stmt, flags) { |
| return this.generateIterationForStatement('in', stmt, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF); |
| }, |
| |
| ForOfStatement: function (stmt, flags) { |
| return this.generateIterationForStatement('of', stmt, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF); |
| }, |
| |
| LabeledStatement: function (stmt, flags) { |
| return [stmt.label.name + ':', this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF)]; |
| }, |
| |
| Program: function (stmt, flags) { |
| var result, fragment, i, iz, bodyFlags; |
| iz = stmt.body.length; |
| result = [safeConcatenation && iz > 0 ? '\n' : '']; |
| bodyFlags = S_TFTF; |
| for (i = 0; i < iz; ++i) { |
| if (!safeConcatenation && i === iz - 1) { |
| bodyFlags |= F_SEMICOLON_OPT; |
| } |
| |
| if (preserveBlankLines) { |
| // handle spaces before the first line |
| if (i === 0) { |
| if (!stmt.body[0].leadingComments) { |
| generateBlankLines(stmt.range[0], stmt.body[i].range[0], result); |
| } |
| } |
| |
| // handle spaces between lines |
| if (i > 0) { |
| if (!stmt.body[i - 1].trailingComments && !stmt.body[i].leadingComments) { |
| generateBlankLines(stmt.body[i - 1].range[1], stmt.body[i].range[0], result); |
| } |
| } |
| } |
| |
| fragment = addIndent(this.generateStatement(stmt.body[i], bodyFlags)); |
| result.push(fragment); |
| if (i + 1 < iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| if (preserveBlankLines) { |
| if (!stmt.body[i + 1].leadingComments) { |
| result.push(newline); |
| } |
| } else { |
| result.push(newline); |
| } |
| } |
| |
| if (preserveBlankLines) { |
| // handle spaces after the last line |
| if (i === iz - 1) { |
| if (!stmt.body[i].trailingComments) { |
| generateBlankLines(stmt.body[i].range[1], stmt.range[1], result); |
| } |
| } |
| } |
| } |
| return result; |
| }, |
| |
| FunctionDeclaration: function (stmt, flags) { |
| return [ |
| generateAsyncPrefix(stmt, true), |
| 'function', |
| generateStarSuffix(stmt) || noEmptySpace(), |
| stmt.id ? generateIdentifier(stmt.id) : '', |
| this.generateFunctionBody(stmt) |
| ]; |
| }, |
| |
| ReturnStatement: function (stmt, flags) { |
| if (stmt.argument) { |
| return [join( |
| 'return', |
| this.generateExpression(stmt.argument, Precedence.Sequence, E_TTT) |
| ), this.semicolon(flags)]; |
| } |
| return ['return' + this.semicolon(flags)]; |
| }, |
| |
| WhileStatement: function (stmt, flags) { |
| var result, that = this; |
| withIndent(function () { |
| result = [ |
| 'while' + space + '(', |
| that.generateExpression(stmt.test, Precedence.Sequence, E_TTT), |
| ')' |
| ]; |
| }); |
| result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF)); |
| return result; |
| }, |
| |
| WithStatement: function (stmt, flags) { |
| var result, that = this; |
| withIndent(function () { |
| result = [ |
| 'with' + space + '(', |
| that.generateExpression(stmt.object, Precedence.Sequence, E_TTT), |
| ')' |
| ]; |
| }); |
| result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF)); |
| return result; |
| } |
| |
| }; |
| |
| merge(CodeGenerator.prototype, CodeGenerator.Statement); |
| |
| // Expressions. |
| |
| CodeGenerator.Expression = { |
| |
| SequenceExpression: function (expr, precedence, flags) { |
| var result, i, iz; |
| if (Precedence.Sequence < precedence) { |
| flags |= F_ALLOW_IN; |
| } |
| result = []; |
| for (i = 0, iz = expr.expressions.length; i < iz; ++i) { |
| result.push(this.generateExpression(expr.expressions[i], Precedence.Assignment, flags)); |
| if (i + 1 < iz) { |
| result.push(',' + space); |
| } |
| } |
| return parenthesize(result, Precedence.Sequence, precedence); |
| }, |
| |
| AssignmentExpression: function (expr, precedence, flags) { |
| return this.generateAssignment(expr.left, expr.right, expr.operator, precedence, flags); |
| }, |
| |
| ArrowFunctionExpression: function (expr, precedence, flags) { |
| return parenthesize(this.generateFunctionBody(expr), Precedence.ArrowFunction, precedence); |
| }, |
| |
| ConditionalExpression: function (expr, precedence, flags) { |
| if (Precedence.Conditional < precedence) { |
| flags |= F_ALLOW_IN; |
| } |
| return parenthesize( |
| [ |
| this.generateExpression(expr.test, Precedence.LogicalOR, flags), |
| space + '?' + space, |
| this.generateExpression(expr.consequent, Precedence.Assignment, flags), |
| space + ':' + space, |
| this.generateExpression(expr.alternate, Precedence.Assignment, flags) |
| ], |
| Precedence.Conditional, |
| precedence |
| ); |
| }, |
| |
| LogicalExpression: function (expr, precedence, flags) { |
| return this.BinaryExpression(expr, precedence, flags); |
| }, |
| |
| BinaryExpression: function (expr, precedence, flags) { |
| var result, currentPrecedence, fragment, leftSource; |
| currentPrecedence = BinaryPrecedence[expr.operator]; |
| |
| if (currentPrecedence < precedence) { |
| flags |= F_ALLOW_IN; |
| } |
| |
| fragment = this.generateExpression(expr.left, currentPrecedence, flags); |
| |
| leftSource = fragment.toString(); |
| |
| if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPartES5(expr.operator.charCodeAt(0))) { |
| result = [fragment, noEmptySpace(), expr.operator]; |
| } else { |
| result = join(fragment, expr.operator); |
| } |
| |
| fragment = this.generateExpression(expr.right, currentPrecedence + 1, flags); |
| |
| if (expr.operator === '/' && fragment.toString().charAt(0) === '/' || |
| expr.operator.slice(-1) === '<' && fragment.toString().slice(0, 3) === '!--') { |
| // If '/' concats with '/' or `<` concats with `!--`, it is interpreted as comment start |
| result.push(noEmptySpace()); |
| result.push(fragment); |
| } else { |
| result = join(result, fragment); |
| } |
| |
| if (expr.operator === 'in' && !(flags & F_ALLOW_IN)) { |
| return ['(', result, ')']; |
| } |
| return parenthesize(result, currentPrecedence, precedence); |
| }, |
| |
| CallExpression: function (expr, precedence, flags) { |
| var result, i, iz; |
| // F_ALLOW_UNPARATH_NEW becomes false. |
| result = [this.generateExpression(expr.callee, Precedence.Call, E_TTF)]; |
| result.push('('); |
| for (i = 0, iz = expr['arguments'].length; i < iz; ++i) { |
| result.push(this.generateExpression(expr['arguments'][i], Precedence.Assignment, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + space); |
| } |
| } |
| result.push(')'); |
| |
| if (!(flags & F_ALLOW_CALL)) { |
| return ['(', result, ')']; |
| } |
| return parenthesize(result, Precedence.Call, precedence); |
| }, |
| |
| NewExpression: function (expr, precedence, flags) { |
| var result, length, i, iz, itemFlags; |
| length = expr['arguments'].length; |
| |
| // F_ALLOW_CALL becomes false. |
| // F_ALLOW_UNPARATH_NEW may become false. |
| itemFlags = (flags & F_ALLOW_UNPARATH_NEW && !parentheses && length === 0) ? E_TFT : E_TFF; |
| |
| result = join( |
| 'new', |
| this.generateExpression(expr.callee, Precedence.New, itemFlags) |
| ); |
| |
| if (!(flags & F_ALLOW_UNPARATH_NEW) || parentheses || length > 0) { |
| result.push('('); |
| for (i = 0, iz = length; i < iz; ++i) { |
| result.push(this.generateExpression(expr['arguments'][i], Precedence.Assignment, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + space); |
| } |
| } |
| result.push(')'); |
| } |
| |
| return parenthesize(result, Precedence.New, precedence); |
| }, |
| |
| MemberExpression: function (expr, precedence, flags) { |
| var result, fragment; |
| |
| // F_ALLOW_UNPARATH_NEW becomes false. |
| result = [this.generateExpression(expr.object, Precedence.Call, (flags & F_ALLOW_CALL) ? E_TTF : E_TFF)]; |
| |
| if (expr.computed) { |
| result.push('['); |
| result.push(this.generateExpression(expr.property, Precedence.Sequence, flags & F_ALLOW_CALL ? E_TTT : E_TFT)); |
| result.push(']'); |
| } else { |
| if (expr.object.type === Syntax.Literal && typeof expr.object.value === 'number') { |
| fragment = toSourceNodeWhenNeeded(result).toString(); |
| // When the following conditions are all true, |
| // 1. No floating point |
| // 2. Don't have exponents |
| // 3. The last character is a decimal digit |
| // 4. Not hexadecimal OR octal number literal |
| // we should add a floating point. |
| if ( |
| fragment.indexOf('.') < 0 && |
| !/[eExX]/.test(fragment) && |
| esutils.code.isDecimalDigit(fragment.charCodeAt(fragment.length - 1)) && |
| !(fragment.length >= 2 && fragment.charCodeAt(0) === 48) // '0' |
| ) { |
| result.push(' '); |
| } |
| } |
| result.push('.'); |
| result.push(generateIdentifier(expr.property)); |
| } |
| |
| return parenthesize(result, Precedence.Member, precedence); |
| }, |
| |
| MetaProperty: function (expr, precedence, flags) { |
| var result; |
| result = []; |
| result.push(typeof expr.meta === "string" ? expr.meta : generateIdentifier(expr.meta)); |
| result.push('.'); |
| result.push(typeof expr.property === "string" ? expr.property : generateIdentifier(expr.property)); |
| return parenthesize(result, Precedence.Member, precedence); |
| }, |
| |
| UnaryExpression: function (expr, precedence, flags) { |
| var result, fragment, rightCharCode, leftSource, leftCharCode; |
| fragment = this.generateExpression(expr.argument, Precedence.Unary, E_TTT); |
| |
| if (space === '') { |
| result = join(expr.operator, fragment); |
| } else { |
| result = [expr.operator]; |
| if (expr.operator.length > 2) { |
| // delete, void, typeof |
| // get `typeof []`, not `typeof[]` |
| result = join(result, fragment); |
| } else { |
| // Prevent inserting spaces between operator and argument if it is unnecessary |
| // like, `!cond` |
| leftSource = toSourceNodeWhenNeeded(result).toString(); |
| leftCharCode = leftSource.charCodeAt(leftSource.length - 1); |
| rightCharCode = fragment.toString().charCodeAt(0); |
| |
| if (((leftCharCode === 0x2B /* + */ || leftCharCode === 0x2D /* - */) && leftCharCode === rightCharCode) || |
| (esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode))) { |
| result.push(noEmptySpace()); |
| result.push(fragment); |
| } else { |
| result.push(fragment); |
| } |
| } |
| } |
| return parenthesize(result, Precedence.Unary, precedence); |
| }, |
| |
| YieldExpression: function (expr, precedence, flags) { |
| var result; |
| if (expr.delegate) { |
| result = 'yield*'; |
| } else { |
| result = 'yield'; |
| } |
| if (expr.argument) { |
| result = join( |
| result, |
| this.generateExpression(expr.argument, Precedence.Yield, E_TTT) |
| ); |
| } |
| return parenthesize(result, Precedence.Yield, precedence); |
| }, |
| |
| AwaitExpression: function (expr, precedence, flags) { |
| var result = join( |
| expr.all ? 'await*' : 'await', |
| this.generateExpression(expr.argument, Precedence.Await, E_TTT) |
| ); |
| return parenthesize(result, Precedence.Await, precedence); |
| }, |
| |
| UpdateExpression: function (expr, precedence, flags) { |
| if (expr.prefix) { |
| return parenthesize( |
| [ |
| expr.operator, |
| this.generateExpression(expr.argument, Precedence.Unary, E_TTT) |
| ], |
| Precedence.Unary, |
| precedence |
| ); |
| } |
| return parenthesize( |
| [ |
| this.generateExpression(expr.argument, Precedence.Postfix, E_TTT), |
| expr.operator |
| ], |
| Precedence.Postfix, |
| precedence |
| ); |
| }, |
| |
| FunctionExpression: function (expr, precedence, flags) { |
| var result = [ |
| generateAsyncPrefix(expr, true), |
| 'function' |
| ]; |
| if (expr.id) { |
| result.push(generateStarSuffix(expr) || noEmptySpace()); |
| result.push(generateIdentifier(expr.id)); |
| } else { |
| result.push(generateStarSuffix(expr) || space); |
| } |
| result.push(this.generateFunctionBody(expr)); |
| return result; |
| }, |
| |
| ArrayPattern: function (expr, precedence, flags) { |
| return this.ArrayExpression(expr, precedence, flags, true); |
| }, |
| |
| ArrayExpression: function (expr, precedence, flags, isPattern) { |
| var result, multiline, that = this; |
| if (!expr.elements.length) { |
| return '[]'; |
| } |
| multiline = isPattern ? false : expr.elements.length > 1; |
| result = ['[', multiline ? newline : '']; |
| withIndent(function (indent) { |
| var i, iz; |
| for (i = 0, iz = expr.elements.length; i < iz; ++i) { |
| if (!expr.elements[i]) { |
| if (multiline) { |
| result.push(indent); |
| } |
| if (i + 1 === iz) { |
| result.push(','); |
| } |
| } else { |
| result.push(multiline ? indent : ''); |
| result.push(that.generateExpression(expr.elements[i], Precedence.Assignment, E_TTT)); |
| } |
| if (i + 1 < iz) { |
| result.push(',' + (multiline ? newline : space)); |
| } |
| } |
| }); |
| if (multiline && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(multiline ? base : ''); |
| result.push(']'); |
| return result; |
| }, |
| |
| RestElement: function(expr, precedence, flags) { |
| return '...' + this.generatePattern(expr.argument); |
| }, |
| |
| ClassExpression: function (expr, precedence, flags) { |
| var result, fragment; |
| result = ['class']; |
| if (expr.id) { |
| result = join(result, this.generateExpression(expr.id, Precedence.Sequence, E_TTT)); |
| } |
| if (expr.superClass) { |
| fragment = join('extends', this.generateExpression(expr.superClass, Precedence.Assignment, E_TTT)); |
| result = join(result, fragment); |
| } |
| result.push(space); |
| result.push(this.generateStatement(expr.body, S_TFFT)); |
| return result; |
| }, |
| |
| MethodDefinition: function (expr, precedence, flags) { |
| var result, fragment; |
| if (expr['static']) { |
| result = ['static' + space]; |
| } else { |
| result = []; |
| } |
| if (expr.kind === 'get' || expr.kind === 'set') { |
| fragment = [ |
| join(expr.kind, this.generatePropertyKey(expr.key, expr.computed)), |
| this.generateFunctionBody(expr.value) |
| ]; |
| } else { |
| fragment = [ |
| generateMethodPrefix(expr), |
| this.generatePropertyKey(expr.key, expr.computed), |
| this.generateFunctionBody(expr.value) |
| ]; |
| } |
| return join(result, fragment); |
| }, |
| |
| Property: function (expr, precedence, flags) { |
| if (expr.kind === 'get' || expr.kind === 'set') { |
| return [ |
| expr.kind, noEmptySpace(), |
| this.generatePropertyKey(expr.key, expr.computed), |
| this.generateFunctionBody(expr.value) |
| ]; |
| } |
| |
| if (expr.shorthand) { |
| if (expr.value.type === "AssignmentPattern") { |
| return this.AssignmentPattern(expr.value, Precedence.Sequence, E_TTT); |
| } |
| return this.generatePropertyKey(expr.key, expr.computed); |
| } |
| |
| if (expr.method) { |
| return [ |
| generateMethodPrefix(expr), |
| this.generatePropertyKey(expr.key, expr.computed), |
| this.generateFunctionBody(expr.value) |
| ]; |
| } |
| |
| return [ |
| this.generatePropertyKey(expr.key, expr.computed), |
| ':' + space, |
| this.generateExpression(expr.value, Precedence.Assignment, E_TTT) |
| ]; |
| }, |
| |
| ObjectExpression: function (expr, precedence, flags) { |
| var multiline, result, fragment, that = this; |
| |
| if (!expr.properties.length) { |
| return '{}'; |
| } |
| multiline = expr.properties.length > 1; |
| |
| withIndent(function () { |
| fragment = that.generateExpression(expr.properties[0], Precedence.Sequence, E_TTT); |
| }); |
| |
| if (!multiline) { |
| // issues 4 |
| // Do not transform from |
| // dejavu.Class.declare({ |
| // method2: function () {} |
| // }); |
| // to |
| // dejavu.Class.declare({method2: function () { |
| // }}); |
| if (!hasLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) { |
| return [ '{', space, fragment, space, '}' ]; |
| } |
| } |
| |
| withIndent(function (indent) { |
| var i, iz; |
| result = [ '{', newline, indent, fragment ]; |
| |
| if (multiline) { |
| result.push(',' + newline); |
| for (i = 1, iz = expr.properties.length; i < iz; ++i) { |
| result.push(indent); |
| result.push(that.generateExpression(expr.properties[i], Precedence.Sequence, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + newline); |
| } |
| } |
| } |
| }); |
| |
| if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(base); |
| result.push('}'); |
| return result; |
| }, |
| |
| AssignmentPattern: function(expr, precedence, flags) { |
| return this.generateAssignment(expr.left, expr.right, '=', precedence, flags); |
| }, |
| |
| ObjectPattern: function (expr, precedence, flags) { |
| var result, i, iz, multiline, property, that = this; |
| if (!expr.properties.length) { |
| return '{}'; |
| } |
| |
| multiline = false; |
| if (expr.properties.length === 1) { |
| property = expr.properties[0]; |
| if (property.value.type !== Syntax.Identifier) { |
| multiline = true; |
| } |
| } else { |
| for (i = 0, iz = expr.properties.length; i < iz; ++i) { |
| property = expr.properties[i]; |
| if (!property.shorthand) { |
| multiline = true; |
| break; |
| } |
| } |
| } |
| result = ['{', multiline ? newline : '' ]; |
| |
| withIndent(function (indent) { |
| var i, iz; |
| for (i = 0, iz = expr.properties.length; i < iz; ++i) { |
| result.push(multiline ? indent : ''); |
| result.push(that.generateExpression(expr.properties[i], Precedence.Sequence, E_TTT)); |
| if (i + 1 < iz) { |
| result.push(',' + (multiline ? newline : space)); |
| } |
| } |
| }); |
| |
| if (multiline && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) { |
| result.push(newline); |
| } |
| result.push(multiline ? base : ''); |
| result.push('}'); |
| return result; |
| }, |
| |
| ThisExpression: function (expr, precedence, flags) { |
| return 'this'; |
| }, |
| |
| Super: function (expr, precedence, flags) { |
| return 'super'; |
| }, |
| |
| Identifier: function (expr, precedence, flags) { |
| return generateIdentifier(expr); |
| }, |
| |
| ImportDefaultSpecifier: function (expr, precedence, flags) { |
| return generateIdentifier(expr.id || expr.local); |
| }, |
| |
| ImportNamespaceSpecifier: function (expr, precedence, flags) { |
| var result = ['*']; |
| var id = expr.id || expr.local; |
| if (id) { |
| result.push(space + 'as' + noEmptySpace() + generateIdentifier(id)); |
| } |
| return result; |
| }, |
| |
| ImportSpecifier: function (expr, precedence, flags) { |
| var imported = expr.imported; |
| var result = [ imported.name ]; |
| var local = expr.local; |
| if (local && local.name !== imported.name) { |
| result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(local)); |
| } |
| return result; |
| }, |
| |
| ExportSpecifier: function (expr, precedence, flags) { |
| var local = expr.local; |
| var result = [ local.name ]; |
| var exported = expr.exported; |
| if (exported && exported.name !== local.name) { |
| result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(exported)); |
| } |
| return result; |
| }, |
| |
| Literal: function (expr, precedence, flags) { |
| var raw; |
| if (expr.hasOwnProperty('raw') && parse && extra.raw) { |
| try { |
| raw = parse(expr.raw).body[0].expression; |
| if (raw.type === Syntax.Literal) { |
| if (raw.value === expr.value) { |
| return expr.raw; |
| } |
| } |
| } catch (e) { |
| // not use raw property |
| } |
| } |
| |
| if (expr.value === null) { |
| return 'null'; |
| } |
| |
| if (typeof expr.value === 'string') { |
| return escapeString(expr.value); |
| } |
| |
| if (typeof expr.value === 'number') { |
| return generateNumber(expr.value); |
| } |
| |
| if (typeof expr.value === 'boolean') { |
| return expr.value ? 'true' : 'false'; |
| } |
| |
| if (expr.regex) { |
| return '/' + expr.regex.pattern + '/' + expr.regex.flags; |
| } |
| return generateRegExp(expr.value); |
| }, |
| |
| GeneratorExpression: function (expr, precedence, flags) { |
| return this.ComprehensionExpression(expr, precedence, flags); |
| }, |
| |
| ComprehensionExpression: function (expr, precedence, flags) { |
| // GeneratorExpression should be parenthesized with (...), ComprehensionExpression with [...] |
| // Due to https://bugzilla.mozilla.org/show_bug.cgi?id=883468 position of expr.body can differ in Spidermonkey and ES6 |
| |
| var result, i, iz, fragment, that = this; |
| result = (expr.type === Syntax.GeneratorExpression) ? ['('] : ['[']; |
| |
| if (extra.moz.comprehensionExpressionStartsWithAssignment) { |
| fragment = this.generateExpression(expr.body, Precedence.Assignment, E_TTT); |
| result.push(fragment); |
| } |
| |
| if (expr.blocks) { |
| withIndent(function () { |
| for (i = 0, iz = expr.blocks.length; i < iz; ++i) { |
| fragment = that.generateExpression(expr.blocks[i], Precedence.Sequence, E_TTT); |
| if (i > 0 || extra.moz.comprehensionExpressionStartsWithAssignment) { |
| result = join(result, fragment); |
| } else { |
| result.push(fragment); |
| } |
| } |
| }); |
| } |
| |
| if (expr.filter) { |
| result = join(result, 'if' + space); |
| fragment = this.generateExpression(expr.filter, Precedence.Sequence, E_TTT); |
| result = join(result, [ '(', fragment, ')' ]); |
| } |
| |
| if (!extra.moz.comprehensionExpressionStartsWithAssignment) { |
| fragment = this.generateExpression(expr.body, Precedence.Assignment, E_TTT); |
| |
| result = join(result, fragment); |
| } |
| |
| result.push((expr.type === Syntax.GeneratorExpression) ? ')' : ']'); |
| return result; |
| }, |
| |
| ComprehensionBlock: function (expr, precedence, flags) { |
| var fragment; |
| if (expr.left.type === Syntax.VariableDeclaration) { |
| fragment = [ |
| expr.left.kind, noEmptySpace(), |
| this.generateStatement(expr.left.declarations[0], S_FFFF) |
| ]; |
| } else { |
| fragment = this.generateExpression(expr.left, Precedence.Call, E_TTT); |
| } |
| |
| fragment = join(fragment, expr.of ? 'of' : 'in'); |
| fragment = join(fragment, this.generateExpression(expr.right, Precedence.Sequence, E_TTT)); |
| |
| return [ 'for' + space + '(', fragment, ')' ]; |
| }, |
| |
| SpreadElement: function (expr, precedence, flags) { |
| return [ |
| '...', |
| this.generateExpression(expr.argument, Precedence.Assignment, E_TTT) |
| ]; |
| }, |
| |
| TaggedTemplateExpression: function (expr, precedence, flags) { |
| var itemFlags = E_TTF; |
| if (!(flags & F_ALLOW_CALL)) { |
| itemFlags = E_TFF; |
| } |
| var result = [ |
| this.generateExpression(expr.tag, Precedence.Call, itemFlags), |
| this.generateExpression(expr.quasi, Precedence.Primary, E_FFT) |
| ]; |
| return parenthesize(result, Precedence.TaggedTemplate, precedence); |
| }, |
| |
| TemplateElement: function (expr, precedence, flags) { |
| // Don't use "cooked". Since tagged template can use raw template |
| // representation. So if we do so, it breaks the script semantics. |
| return expr.value.raw; |
| }, |
| |
| TemplateLiteral: function (expr, precedence, flags) { |
| var result, i, iz; |
| result = [ '`' ]; |
| for (i = 0, iz = expr.quasis.length; i < iz; ++i) { |
| result.push(this.generateExpression(expr.quasis[i], Precedence.Primary, E_TTT)); |
| if (i + 1 < iz) { |
| result.push('${' + space); |
| result.push(this.generateExpression(expr.expressions[i], Precedence.Sequence, E_TTT)); |
| result.push(space + '}'); |
| } |
| } |
| result.push('`'); |
| return result; |
| }, |
| |
| ModuleSpecifier: function (expr, precedence, flags) { |
| return this.Literal(expr, precedence, flags); |
| }, |
| |
| ImportExpression: function(expr, precedence, flag) { |
| return parenthesize([ |
| 'import(', |
| this.generateExpression(expr.source, Precedence.Assignment, E_TTT), |
| ')' |
| ], Precedence.Call, precedence); |
| }, |
| |
| }; |
| |
| merge(CodeGenerator.prototype, CodeGenerator.Expression); |
| |
| CodeGenerator.prototype.generateExpression = function (expr, precedence, flags) { |
| var result, type; |
| |
| type = expr.type || Syntax.Property; |
| |
| if (extra.verbatim && expr.hasOwnProperty(extra.verbatim)) { |
| return generateVerbatim(expr, precedence); |
| } |
| |
| result = this[type](expr, precedence, flags); |
| |
| |
| if (extra.comment) { |
| result = addComments(expr, result); |
| } |
| return toSourceNodeWhenNeeded(result, expr); |
| }; |
| |
| CodeGenerator.prototype.generateStatement = function (stmt, flags) { |
| var result, |
| fragment; |
| |
| result = this[stmt.type](stmt, flags); |
| |
| // Attach comments |
| |
| if (extra.comment) { |
| result = addComments(stmt, result); |
| } |
| |
| fragment = toSourceNodeWhenNeeded(result).toString(); |
| if (stmt.type === Syntax.Program && !safeConcatenation && newline === '' && fragment.charAt(fragment.length - 1) === '\n') { |
| result = sourceMap ? toSourceNodeWhenNeeded(result).replaceRight(/\s+$/, '') : fragment.replace(/\s+$/, ''); |
| } |
| |
| return toSourceNodeWhenNeeded(result, stmt); |
| }; |
| |
| function generateInternal(node) { |
| var codegen; |
| |
| codegen = new CodeGenerator(); |
| if (isStatement(node)) { |
| return codegen.generateStatement(node, S_TFFF); |
| } |
| |
| if (isExpression(node)) { |
| return codegen.generateExpression(node, Precedence.Sequence, E_TTT); |
| } |
| |
| throw new Error('Unknown node type: ' + node.type); |
| } |
| |
| function generate(node, options) { |
| var defaultOptions = getDefaultOptions(), result, pair; |
| |
| if (options != null) { |
| // Obsolete options |
| // |
| // `options.indent` |
| // `options.base` |
| // |
| // Instead of them, we can use `option.format.indent`. |
| if (typeof options.indent === 'string') { |
| defaultOptions.format.indent.style = options.indent; |
| } |
| if (typeof options.base === 'number') { |
| defaultOptions.format.indent.base = options.base; |
| } |
| options = updateDeeply(defaultOptions, options); |
| indent = options.format.indent.style; |
| if (typeof options.base === 'string') { |
| base = options.base; |
| } else { |
| base = stringRepeat(indent, options.format.indent.base); |
| } |
| } else { |
| options = defaultOptions; |
| indent = options.format.indent.style; |
| base = stringRepeat(indent, options.format.indent.base); |
| } |
| json = options.format.json; |
| renumber = options.format.renumber; |
| hexadecimal = json ? false : options.format.hexadecimal; |
| quotes = json ? 'double' : options.format.quotes; |
| escapeless = options.format.escapeless; |
| newline = options.format.newline; |
| space = options.format.space; |
| if (options.format.compact) { |
| newline = space = indent = base = ''; |
| } |
| parentheses = options.format.parentheses; |
| semicolons = options.format.semicolons; |
| safeConcatenation = options.format.safeConcatenation; |
| directive = options.directive; |
| parse = json ? null : options.parse; |
| sourceMap = options.sourceMap; |
| sourceCode = options.sourceCode; |
| preserveBlankLines = options.format.preserveBlankLines && sourceCode !== null; |
| extra = options; |
| |
| if (sourceMap) { |
| if (!exports.browser) { |
| // We assume environment is node.js |
| // And prevent from including source-map by browserify |
| SourceNode = require('source-map').SourceNode; |
| } else { |
| SourceNode = global.sourceMap.SourceNode; |
| } |
| } |
| |
| result = generateInternal(node); |
| |
| if (!sourceMap) { |
| pair = {code: result.toString(), map: null}; |
| return options.sourceMapWithCode ? pair : pair.code; |
| } |
| |
| |
| pair = result.toStringWithSourceMap({ |
| file: options.file, |
| sourceRoot: options.sourceMapRoot |
| }); |
| |
| if (options.sourceContent) { |
| pair.map.setSourceContent(options.sourceMap, |
| options.sourceContent); |
| } |
| |
| if (options.sourceMapWithCode) { |
| return pair; |
| } |
| |
| return pair.map.toString(); |
| } |
| |
| FORMAT_MINIFY = { |
| indent: { |
| style: '', |
| base: 0 |
| }, |
| renumber: true, |
| hexadecimal: true, |
| quotes: 'auto', |
| escapeless: true, |
| compact: true, |
| parentheses: false, |
| semicolons: false |
| }; |
| |
| FORMAT_DEFAULTS = getDefaultOptions().format; |
| |
| exports.version = require('./package.json').version; |
| exports.generate = generate; |
| exports.attachComments = estraverse.attachComments; |
| exports.Precedence = updateDeeply({}, Precedence); |
| exports.browser = false; |
| exports.FORMAT_MINIFY = FORMAT_MINIFY; |
| exports.FORMAT_DEFAULTS = FORMAT_DEFAULTS; |
| }()); |
| /* vim: set sw=4 ts=4 et tw=80 : */ |
