Proyectos de Subversion Moodle

YUI.add('moodle-atto_html-beautify', function (Y, NAME) {

// JSBeautify adds itself to the exports object if one exists.

// Define exports here and it will work as if by magic.

// This is safe to put in a function and will not be exported to the global

// namespace. Note, we'll have to remove this when YUI supports, and we move to ES6.

var exports = {};

var define = null; // Remove require.js support in this context.

// JSBeautify calls require() in order to get the existing exported modules.

var require = function() {

    return exports;

};

require();

// Actually define beautify in our namespace.

Y.namespace('M.atto_html').beautify = exports;

/* AUTO-GENERATED. DO NOT MODIFY. */

/*

  The MIT License (MIT)

  Copyright (c) 2007-2018 Einar Lielmanis, Liam Newman, and contributors.

  Permission is hereby granted, free of charge, to any person

  obtaining a copy of this software and associated documentation files

  (the "Software"), to deal in the Software without restriction,

  including without limitation the rights to use, copy, modify, merge,

  publish, distribute, sublicense, and/or sell copies of the Software,

  and to permit persons to whom the Software is furnished to do so,

  subject to the following conditions:

  The above copyright notice and this permission notice shall be

  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

  SOFTWARE.

 JS Beautifier

---------------

  Written by Einar Lielmanis, <einar@beautifier.io>

      https://beautifier.io/

  Originally converted to javascript by Vital, <vital76@gmail.com>

  "End braces on own line" added by Chris J. Shull, <chrisjshull@gmail.com>

  Parsing improvements for brace-less statements by Liam Newman <bitwiseman@beautifier.io>

  Usage:

    js_beautify(js_source_text);

    js_beautify(js_source_text, options);

  The options are:

    indent_size (default 4)          - indentation size,

    indent_char (default space)      - character to indent with,

    preserve_newlines (default true) - whether existing line breaks should be preserved,

    max_preserve_newlines (default unlimited) - maximum number of line breaks to be preserved in one chunk,

    jslint_happy (default false) - if true, then jslint-stricter mode is enforced.

            jslint_happy        !jslint_happy

            ---------------------------------

            function ()         function()

            switch () {         switch() {

            case 1:               case 1:

              break;                break;

            }                   }

    space_after_anon_function (default false) - should the space before an anonymous function's parens be added, "function()" vs "function ()",

          NOTE: This option is overridden by jslint_happy (i.e. if jslint_happy is true, space_after_anon_function is true by design)

    brace_style (default "collapse") - "collapse" | "expand" | "end-expand" | "none" | any of the former + ",preserve-inline"

            put braces on the same line as control statements (default), or put braces on own line (Allman / ANSI style), or just put end braces on own line, or attempt to keep them where they are.

            preserve-inline will try to preserve inline blocks of curly braces

    space_before_conditional (default true) - should the space before conditional statement be added, "if(true)" vs "if (true)",

    unescape_strings (default false) - should printable characters in strings encoded in \xNN notation be unescaped, "example" vs "\x65\x78\x61\x6d\x70\x6c\x65"

    wrap_line_length (default unlimited) - lines should wrap at next opportunity after this number of characters.

          NOTE: This is not a hard limit. Lines will continue until a point where a newline would

                be preserved if it were present.

    end_with_newline (default false)  - end output with a newline

    e.g

    js_beautify(js_source_text, {

      'indent_size': 1,

      'indent_char': '\t'

    });

*/

(function() {

/* GENERATED_BUILD_OUTPUT */

var legacy_beautify_js;

/******/ (function() { // webpackBootstrap

/******/ 	"use strict";

/******/ 	var __webpack_modules__ = ([

/* 0 */

/***/ (function(module, __unused_webpack_exports, __webpack_require__) {

/*jshint node:true */

/*

  The MIT License (MIT)

  Copyright (c) 2007-2018 Einar Lielmanis, Liam Newman, and contributors.

  Permission is hereby granted, free of charge, to any person

  obtaining a copy of this software and associated documentation files

  (the "Software"), to deal in the Software without restriction,

  including without limitation the rights to use, copy, modify, merge,

  publish, distribute, sublicense, and/or sell copies of the Software,

  and to permit persons to whom the Software is furnished to do so,

  subject to the following conditions:

  The above copyright notice and this permission notice shall be

  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

  SOFTWARE.

*/

var Beautifier = (__webpack_require__(1).Beautifier),

  Options = (__webpack_require__(5).Options);

function js_beautify(js_source_text, options) {

  var beautifier = new Beautifier(js_source_text, options);

  return beautifier.beautify();

}

module.exports = js_beautify;

module.exports.defaultOptions = function() {

  return new Options();

};

/***/ }),

/* 1 */

/***/ (function(module, __unused_webpack_exports, __webpack_require__) {

/*jshint node:true */

/*

  The MIT License (MIT)

  Copyright (c) 2007-2018 Einar Lielmanis, Liam Newman, and contributors.

  Permission is hereby granted, free of charge, to any person

  obtaining a copy of this software and associated documentation files

  (the "Software"), to deal in the Software without restriction,

  including without limitation the rights to use, copy, modify, merge,

  publish, distribute, sublicense, and/or sell copies of the Software,

  and to permit persons to whom the Software is furnished to do so,

  subject to the following conditions:

  The above copyright notice and this permission notice shall be

  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

  SOFTWARE.

*/

var Output = (__webpack_require__(2).Output);

var Token = (__webpack_require__(3).Token);

var acorn = __webpack_require__(4);

var Options = (__webpack_require__(5).Options);

var Tokenizer = (__webpack_require__(7).Tokenizer);

var line_starters = (__webpack_require__(7).line_starters);

var positionable_operators = (__webpack_require__(7).positionable_operators);

var TOKEN = (__webpack_require__(7).TOKEN);

function in_array(what, arr) {

  return arr.indexOf(what) !== -1;

}

function ltrim(s) {

  return s.replace(/^\s+/g, '');

}

function generateMapFromStrings(list) {

  var result = {};

  for (var x = 0; x < list.length; x++) {

    // make the mapped names underscored instead of dash

    result[list[x].replace(/-/g, '_')] = list[x];

  }

  return result;

}

function reserved_word(token, word) {

  return token && token.type === TOKEN.RESERVED && token.text === word;

}

function reserved_array(token, words) {

  return token && token.type === TOKEN.RESERVED && in_array(token.text, words);

}

// Unsure of what they mean, but they work. Worth cleaning up in future.

var special_words = ['case', 'return', 'do', 'if', 'throw', 'else', 'await', 'break', 'continue', 'async'];

var validPositionValues = ['before-newline', 'after-newline', 'preserve-newline'];

// Generate map from array

var OPERATOR_POSITION = generateMapFromStrings(validPositionValues);

var OPERATOR_POSITION_BEFORE_OR_PRESERVE = [OPERATOR_POSITION.before_newline, OPERATOR_POSITION.preserve_newline];

var MODE = {

  BlockStatement: 'BlockStatement', // 'BLOCK'

  Statement: 'Statement', // 'STATEMENT'

  ObjectLiteral: 'ObjectLiteral', // 'OBJECT',

  ArrayLiteral: 'ArrayLiteral', //'[EXPRESSION]',

  ForInitializer: 'ForInitializer', //'(FOR-EXPRESSION)',

  Conditional: 'Conditional', //'(COND-EXPRESSION)',

  Expression: 'Expression' //'(EXPRESSION)'

};

function remove_redundant_indentation(output, frame) {

  // This implementation is effective but has some issues:

  //     - can cause line wrap to happen too soon due to indent removal

  //           after wrap points are calculated

  // These issues are minor compared to ugly indentation.

  if (frame.multiline_frame ||

    frame.mode === MODE.ForInitializer ||

    frame.mode === MODE.Conditional) {

    return;

  }

  // remove one indent from each line inside this section

  output.remove_indent(frame.start_line_index);

}

// we could use just string.split, but

// IE doesn't like returning empty strings

function split_linebreaks(s) {

  //return s.split(/\x0d\x0a|\x0a/);

  s = s.replace(acorn.allLineBreaks, '\n');

  var out = [],

    idx = s.indexOf("\n");

  while (idx !== -1) {

    out.push(s.substring(0, idx));

    s = s.substring(idx + 1);

    idx = s.indexOf("\n");

  }

  if (s.length) {

    out.push(s);

  }

  return out;

}

function is_array(mode) {

  return mode === MODE.ArrayLiteral;

}

function is_expression(mode) {

  return in_array(mode, [MODE.Expression, MODE.ForInitializer, MODE.Conditional]);

}

function all_lines_start_with(lines, c) {

  for (var i = 0; i < lines.length; i++) {

    var line = lines[i].trim();

    if (line.charAt(0) !== c) {

      return false;

    }

  }

  return true;

}

function each_line_matches_indent(lines, indent) {

  var i = 0,

    len = lines.length,

    line;

  for (; i < len; i++) {

    line = lines[i];

    // allow empty lines to pass through

    if (line && line.indexOf(indent) !== 0) {

      return false;

    }

  }

  return true;

}

function Beautifier(source_text, options) {

  options = options || {};

  this._source_text = source_text || '';

  this._output = null;

  this._tokens = null;

  this._last_last_text = null;

  this._flags = null;

  this._previous_flags = null;

  this._flag_store = null;

  this._options = new Options(options);

}

Beautifier.prototype.create_flags = function(flags_base, mode) {

  var next_indent_level = 0;

  if (flags_base) {

    next_indent_level = flags_base.indentation_level;

    if (!this._output.just_added_newline() &&

      flags_base.line_indent_level > next_indent_level) {

      next_indent_level = flags_base.line_indent_level;

    }

  }

  var next_flags = {

    mode: mode,

    parent: flags_base,

    last_token: flags_base ? flags_base.last_token : new Token(TOKEN.START_BLOCK, ''), // last token text

    last_word: flags_base ? flags_base.last_word : '', // last TOKEN.WORD passed

    declaration_statement: false,

    declaration_assignment: false,

    multiline_frame: false,

    inline_frame: false,

    if_block: false,

    else_block: false,

    class_start_block: false, // class A { INSIDE HERE } or class B extends C { INSIDE HERE }

    do_block: false,

    do_while: false,

    import_block: false,

    in_case_statement: false, // switch(..){ INSIDE HERE }

    in_case: false, // we're on the exact line with "case 0:"

    case_body: false, // the indented case-action block

    case_block: false, // the indented case-action block is wrapped with {}

    indentation_level: next_indent_level,

    alignment: 0,

    line_indent_level: flags_base ? flags_base.line_indent_level : next_indent_level,

    start_line_index: this._output.get_line_number(),

    ternary_depth: 0

  };

  return next_flags;

};

Beautifier.prototype._reset = function(source_text) {

  var baseIndentString = source_text.match(/^[\t ]*/)[0];

  this._last_last_text = ''; // pre-last token text

  this._output = new Output(this._options, baseIndentString);

  // If testing the ignore directive, start with output disable set to true

  this._output.raw = this._options.test_output_raw;

  // Stack of parsing/formatting states, including MODE.

  // We tokenize, parse, and output in an almost purely a forward-only stream of token input

  // and formatted output.  This makes the beautifier less accurate than full parsers

  // but also far more tolerant of syntax errors.

  //

  // For example, the default mode is MODE.BlockStatement. If we see a '{' we push a new frame of type

  // MODE.BlockStatement on the the stack, even though it could be object literal.  If we later

  // encounter a ":", we'll switch to to MODE.ObjectLiteral.  If we then see a ";",

  // most full parsers would die, but the beautifier gracefully falls back to

  // MODE.BlockStatement and continues on.

  this._flag_store = [];

  this.set_mode(MODE.BlockStatement);

  var tokenizer = new Tokenizer(source_text, this._options);

  this._tokens = tokenizer.tokenize();

  return source_text;

};

Beautifier.prototype.beautify = function() {

  // if disabled, return the input unchanged.

  if (this._options.disabled) {

    return this._source_text;

  }

  var sweet_code;

  var source_text = this._reset(this._source_text);

  var eol = this._options.eol;

  if (this._options.eol === 'auto') {

    eol = '\n';

    if (source_text && acorn.lineBreak.test(source_text || '')) {

      eol = source_text.match(acorn.lineBreak)[0];

    }

  }

  var current_token = this._tokens.next();

  while (current_token) {

    this.handle_token(current_token);

    this._last_last_text = this._flags.last_token.text;

    this._flags.last_token = current_token;

    current_token = this._tokens.next();

  }

  sweet_code = this._output.get_code(eol);

  return sweet_code;

};

Beautifier.prototype.handle_token = function(current_token, preserve_statement_flags) {

  if (current_token.type === TOKEN.START_EXPR) {

    this.handle_start_expr(current_token);

  } else if (current_token.type === TOKEN.END_EXPR) {

    this.handle_end_expr(current_token);

  } else if (current_token.type === TOKEN.START_BLOCK) {

    this.handle_start_block(current_token);

  } else if (current_token.type === TOKEN.END_BLOCK) {

    this.handle_end_block(current_token);

  } else if (current_token.type === TOKEN.WORD) {

    this.handle_word(current_token);

  } else if (current_token.type === TOKEN.RESERVED) {

    this.handle_word(current_token);

  } else if (current_token.type === TOKEN.SEMICOLON) {

    this.handle_semicolon(current_token);

  } else if (current_token.type === TOKEN.STRING) {

    this.handle_string(current_token);

  } else if (current_token.type === TOKEN.EQUALS) {

    this.handle_equals(current_token);

  } else if (current_token.type === TOKEN.OPERATOR) {

    this.handle_operator(current_token);

  } else if (current_token.type === TOKEN.COMMA) {

    this.handle_comma(current_token);

  } else if (current_token.type === TOKEN.BLOCK_COMMENT) {

    this.handle_block_comment(current_token, preserve_statement_flags);

  } else if (current_token.type === TOKEN.COMMENT) {

    this.handle_comment(current_token, preserve_statement_flags);

  } else if (current_token.type === TOKEN.DOT) {

    this.handle_dot(current_token);

  } else if (current_token.type === TOKEN.EOF) {

    this.handle_eof(current_token);

  } else if (current_token.type === TOKEN.UNKNOWN) {

    this.handle_unknown(current_token, preserve_statement_flags);

  } else {

    this.handle_unknown(current_token, preserve_statement_flags);

  }

};

Beautifier.prototype.handle_whitespace_and_comments = function(current_token, preserve_statement_flags) {

  var newlines = current_token.newlines;

  var keep_whitespace = this._options.keep_array_indentation && is_array(this._flags.mode);

  if (current_token.comments_before) {

    var comment_token = current_token.comments_before.next();

    while (comment_token) {

      // The cleanest handling of inline comments is to treat them as though they aren't there.

      // Just continue formatting and the behavior should be logical.

      // Also ignore unknown tokens.  Again, this should result in better behavior.

      this.handle_whitespace_and_comments(comment_token, preserve_statement_flags);

      this.handle_token(comment_token, preserve_statement_flags);

      comment_token = current_token.comments_before.next();

    }

  }

  if (keep_whitespace) {

    for (var i = 0; i < newlines; i += 1) {

      this.print_newline(i > 0, preserve_statement_flags);

    }

  } else {

    if (this._options.max_preserve_newlines && newlines > this._options.max_preserve_newlines) {

      newlines = this._options.max_preserve_newlines;

    }

    if (this._options.preserve_newlines) {

      if (newlines > 1) {

        this.print_newline(false, preserve_statement_flags);

        for (var j = 1; j < newlines; j += 1) {

          this.print_newline(true, preserve_statement_flags);

        }

      }

    }

  }

};

var newline_restricted_tokens = ['async', 'break', 'continue', 'return', 'throw', 'yield'];

Beautifier.prototype.allow_wrap_or_preserved_newline = function(current_token, force_linewrap) {

  force_linewrap = (force_linewrap === undefined) ? false : force_linewrap;

  // Never wrap the first token on a line

  if (this._output.just_added_newline()) {

    return;

  }

  var shouldPreserveOrForce = (this._options.preserve_newlines && current_token.newlines) || force_linewrap;

  var operatorLogicApplies = in_array(this._flags.last_token.text, positionable_operators) ||

    in_array(current_token.text, positionable_operators);

  if (operatorLogicApplies) {

    var shouldPrintOperatorNewline = (

        in_array(this._flags.last_token.text, positionable_operators) &&

        in_array(this._options.operator_position, OPERATOR_POSITION_BEFORE_OR_PRESERVE)

      ) ||

      in_array(current_token.text, positionable_operators);

    shouldPreserveOrForce = shouldPreserveOrForce && shouldPrintOperatorNewline;

  }

  if (shouldPreserveOrForce) {

    this.print_newline(false, true);

  } else if (this._options.wrap_line_length) {

    if (reserved_array(this._flags.last_token, newline_restricted_tokens)) {

      // These tokens should never have a newline inserted

      // between them and the following expression.

      return;

    }

    this._output.set_wrap_point();

  }

};

Beautifier.prototype.print_newline = function(force_newline, preserve_statement_flags) {

  if (!preserve_statement_flags) {

    if (this._flags.last_token.text !== ';' && this._flags.last_token.text !== ',' && this._flags.last_token.text !== '=' && (this._flags.last_token.type !== TOKEN.OPERATOR || this._flags.last_token.text === '--' || this._flags.last_token.text === '++')) {

      var next_token = this._tokens.peek();

      while (this._flags.mode === MODE.Statement &&

        !(this._flags.if_block && reserved_word(next_token, 'else')) &&

        !this._flags.do_block) {

        this.restore_mode();

      }

    }

  }

  if (this._output.add_new_line(force_newline)) {

    this._flags.multiline_frame = true;

  }

};

Beautifier.prototype.print_token_line_indentation = function(current_token) {

  if (this._output.just_added_newline()) {

    if (this._options.keep_array_indentation &&

      current_token.newlines &&

      (current_token.text === '[' || is_array(this._flags.mode))) {

      this._output.current_line.set_indent(-1);

      this._output.current_line.push(current_token.whitespace_before);

      this._output.space_before_token = false;

    } else if (this._output.set_indent(this._flags.indentation_level, this._flags.alignment)) {

      this._flags.line_indent_level = this._flags.indentation_level;

    }

  }

};

Beautifier.prototype.print_token = function(current_token) {

  if (this._output.raw) {

    this._output.add_raw_token(current_token);

    return;

  }

  if (this._options.comma_first && current_token.previous && current_token.previous.type === TOKEN.COMMA &&

    this._output.just_added_newline()) {

    if (this._output.previous_line.last() === ',') {

      var popped = this._output.previous_line.pop();

      // if the comma was already at the start of the line,

      // pull back onto that line and reprint the indentation

      if (this._output.previous_line.is_empty()) {

        this._output.previous_line.push(popped);

        this._output.trim(true);

        this._output.current_line.pop();

        this._output.trim();

      }

      // add the comma in front of the next token

      this.print_token_line_indentation(current_token);

      this._output.add_token(',');

      this._output.space_before_token = true;

    }

  }

  this.print_token_line_indentation(current_token);

  this._output.non_breaking_space = true;

  this._output.add_token(current_token.text);

  if (this._output.previous_token_wrapped) {

    this._flags.multiline_frame = true;

  }

};

Beautifier.prototype.indent = function() {

  this._flags.indentation_level += 1;

  this._output.set_indent(this._flags.indentation_level, this._flags.alignment);

};

Beautifier.prototype.deindent = function() {

  if (this._flags.indentation_level > 0 &&

    ((!this._flags.parent) || this._flags.indentation_level > this._flags.parent.indentation_level)) {

    this._flags.indentation_level -= 1;

    this._output.set_indent(this._flags.indentation_level, this._flags.alignment);

  }

};

Beautifier.prototype.set_mode = function(mode) {

  if (this._flags) {

    this._flag_store.push(this._flags);

    this._previous_flags = this._flags;

  } else {

    this._previous_flags = this.create_flags(null, mode);

  }

  this._flags = this.create_flags(this._previous_flags, mode);

  this._output.set_indent(this._flags.indentation_level, this._flags.alignment);

};

Beautifier.prototype.restore_mode = function() {

  if (this._flag_store.length > 0) {

    this._previous_flags = this._flags;

    this._flags = this._flag_store.pop();

    if (this._previous_flags.mode === MODE.Statement) {

      remove_redundant_indentation(this._output, this._previous_flags);

    }

    this._output.set_indent(this._flags.indentation_level, this._flags.alignment);

  }

};

Beautifier.prototype.start_of_object_property = function() {

  return this._flags.parent.mode === MODE.ObjectLiteral && this._flags.mode === MODE.Statement && (

    (this._flags.last_token.text === ':' && this._flags.ternary_depth === 0) || (reserved_array(this._flags.last_token, ['get', 'set'])));

};

Beautifier.prototype.start_of_statement = function(current_token) {

  var start = false;

  start = start || reserved_array(this._flags.last_token, ['var', 'let', 'const']) && current_token.type === TOKEN.WORD;

  start = start || reserved_word(this._flags.last_token, 'do');

  start = start || (!(this._flags.parent.mode === MODE.ObjectLiteral && this._flags.mode === MODE.Statement)) && reserved_array(this._flags.last_token, newline_restricted_tokens) && !current_token.newlines;

  start = start || reserved_word(this._flags.last_token, 'else') &&

    !(reserved_word(current_token, 'if') && !current_token.comments_before);

  start = start || (this._flags.last_token.type === TOKEN.END_EXPR && (this._previous_flags.mode === MODE.ForInitializer || this._previous_flags.mode === MODE.Conditional));

  start = start || (this._flags.last_token.type === TOKEN.WORD && this._flags.mode === MODE.BlockStatement &&

    !this._flags.in_case &&

    !(current_token.text === '--' || current_token.text === '++') &&

    this._last_last_text !== 'function' &&

    current_token.type !== TOKEN.WORD && current_token.type !== TOKEN.RESERVED);

  start = start || (this._flags.mode === MODE.ObjectLiteral && (

    (this._flags.last_token.text === ':' && this._flags.ternary_depth === 0) || reserved_array(this._flags.last_token, ['get', 'set'])));

  if (start) {

    this.set_mode(MODE.Statement);

    this.indent();

    this.handle_whitespace_and_comments(current_token, true);

    // Issue #276:

    // If starting a new statement with [if, for, while, do], push to a new line.

    // if (a) if (b) if(c) d(); else e(); else f();

    if (!this.start_of_object_property()) {

      this.allow_wrap_or_preserved_newline(current_token,

        reserved_array(current_token, ['do', 'for', 'if', 'while']));

    }

    return true;

  }

  return false;

};

Beautifier.prototype.handle_start_expr = function(current_token) {

  // The conditional starts the statement if appropriate.

  if (!this.start_of_statement(current_token)) {

    this.handle_whitespace_and_comments(current_token);

  }

  var next_mode = MODE.Expression;

  if (current_token.text === '[') {

    if (this._flags.last_token.type === TOKEN.WORD || this._flags.last_token.text === ')') {

      // this is array index specifier, break immediately

      // a[x], fn()[x]

      if (reserved_array(this._flags.last_token, line_starters)) {

        this._output.space_before_token = true;

      }

      this.print_token(current_token);

      this.set_mode(next_mode);

      this.indent();

      if (this._options.space_in_paren) {

        this._output.space_before_token = true;

      }

      return;

    }

    next_mode = MODE.ArrayLiteral;

    if (is_array(this._flags.mode)) {

      if (this._flags.last_token.text === '[' ||

        (this._flags.last_token.text === ',' && (this._last_last_text === ']' || this._last_last_text === '}'))) {

        // ], [ goes to new line

        // }, [ goes to new line

        if (!this._options.keep_array_indentation) {

          this.print_newline();

        }

      }

    }

    if (!in_array(this._flags.last_token.type, [TOKEN.START_EXPR, TOKEN.END_EXPR, TOKEN.WORD, TOKEN.OPERATOR, TOKEN.DOT])) {

      this._output.space_before_token = true;

    }

  } else {

    if (this._flags.last_token.type === TOKEN.RESERVED) {

      if (this._flags.last_token.text === 'for') {

        this._output.space_before_token = this._options.space_before_conditional;

        next_mode = MODE.ForInitializer;

      } else if (in_array(this._flags.last_token.text, ['if', 'while', 'switch'])) {

        this._output.space_before_token = this._options.space_before_conditional;

        next_mode = MODE.Conditional;

      } else if (in_array(this._flags.last_word, ['await', 'async'])) {

        // Should be a space between await and an IIFE, or async and an arrow function

        this._output.space_before_token = true;

      } else if (this._flags.last_token.text === 'import' && current_token.whitespace_before === '') {

        this._output.space_before_token = false;

      } else if (in_array(this._flags.last_token.text, line_starters) || this._flags.last_token.text === 'catch') {

        this._output.space_before_token = true;

      }

    } else if (this._flags.last_token.type === TOKEN.EQUALS || this._flags.last_token.type === TOKEN.OPERATOR) {

      // Support of this kind of newline preservation.

      // a = (b &&

      //     (c || d));

      if (!this.start_of_object_property()) {

        this.allow_wrap_or_preserved_newline(current_token);

      }

    } else if (this._flags.last_token.type === TOKEN.WORD) {

      this._output.space_before_token = false;

      // function name() vs function name ()

      // function* name() vs function* name ()

      // async name() vs async name ()

      // In ES6, you can also define the method properties of an object

      // var obj = {a: function() {}}

      // It can be abbreviated

      // var obj = {a() {}}

      // var obj = { a() {}} vs var obj = { a () {}}

      // var obj = { * a() {}} vs var obj = { * a () {}}

      var peek_back_two = this._tokens.peek(-3);

      if (this._options.space_after_named_function && peek_back_two) {

        // peek starts at next character so -1 is current token

        var peek_back_three = this._tokens.peek(-4);

        if (reserved_array(peek_back_two, ['async', 'function']) ||

          (peek_back_two.text === '*' && reserved_array(peek_back_three, ['async', 'function']))) {

          this._output.space_before_token = true;

        } else if (this._flags.mode === MODE.ObjectLiteral) {

          if ((peek_back_two.text === '{' || peek_back_two.text === ',') ||

            (peek_back_two.text === '*' && (peek_back_three.text === '{' || peek_back_three.text === ','))) {

            this._output.space_before_token = true;

          }

        } else if (this._flags.parent && this._flags.parent.class_start_block) {

          this._output.space_before_token = true;

        }

      }

    } else {

      // Support preserving wrapped arrow function expressions

      // a.b('c',

      //     () => d.e

      // )

      this.allow_wrap_or_preserved_newline(current_token);

    }

    // function() vs function ()

    // yield*() vs yield* ()

    // function*() vs function* ()

    if ((this._flags.last_token.type === TOKEN.RESERVED && (this._flags.last_word === 'function' || this._flags.last_word === 'typeof')) ||

      (this._flags.last_token.text === '*' &&

        (in_array(this._last_last_text, ['function', 'yield']) ||

          (this._flags.mode === MODE.ObjectLiteral && in_array(this._last_last_text, ['{', ',']))))) {

      this._output.space_before_token = this._options.space_after_anon_function;

    }

  }

  if (this._flags.last_token.text === ';' || this._flags.last_token.type === TOKEN.START_BLOCK) {

    this.print_newline();

  } else if (this._flags.last_token.type === TOKEN.END_EXPR || this._flags.last_token.type === TOKEN.START_EXPR || this._flags.last_token.type === TOKEN.END_BLOCK || this._flags.last_token.text === '.' || this._flags.last_token.type === TOKEN.COMMA) {

    // do nothing on (( and )( and ][ and ]( and .(

    // TODO: Consider whether forcing this is required.  Review failing tests when removed.

    this.allow_wrap_or_preserved_newline(current_token, current_token.newlines);

  }

  this.print_token(current_token);

  this.set_mode(next_mode);

  if (this._options.space_in_paren) {

    this._output.space_before_token = true;

  }

  // In all cases, if we newline while inside an expression it should be indented.

  this.indent();

};

Beautifier.prototype.handle_end_expr = function(current_token) {

  // statements inside expressions are not valid syntax, but...

  // statements must all be closed when their container closes

  while (this._flags.mode === MODE.Statement) {

    this.restore_mode();

  }

  this.handle_whitespace_and_comments(current_token);

  if (this._flags.multiline_frame) {

    this.allow_wrap_or_preserved_newline(current_token,

      current_token.text === ']' && is_array(this._flags.mode) && !this._options.keep_array_indentation);

  }

  if (this._options.space_in_paren) {

    if (this._flags.last_token.type === TOKEN.START_EXPR && !this._options.space_in_empty_paren) {

      // () [] no inner space in empty parens like these, ever, ref #320

      this._output.trim();

      this._output.space_before_token = false;

    } else {

      this._output.space_before_token = true;

    }

  }

  this.deindent();

  this.print_token(current_token);

  this.restore_mode();

  remove_redundant_indentation(this._output, this._previous_flags);

  // do {} while () // no statement required after

  if (this._flags.do_while && this._previous_flags.mode === MODE.Conditional) {

    this._previous_flags.mode = MODE.Expression;

    this._flags.do_block = false;

    this._flags.do_while = false;

  }

};

Beautifier.prototype.handle_start_block = function(current_token) {

  this.handle_whitespace_and_comments(current_token);

  // Check if this is should be treated as a ObjectLiteral

  var next_token = this._tokens.peek();

  var second_token = this._tokens.peek(1);

  if (this._flags.last_word === 'switch' && this._flags.last_token.type === TOKEN.END_EXPR) {

    this.set_mode(MODE.BlockStatement);

    this._flags.in_case_statement = true;

  } else if (this._flags.case_body) {

    this.set_mode(MODE.BlockStatement);

  } else if (second_token && (

      (in_array(second_token.text, [':', ',']) && in_array(next_token.type, [TOKEN.STRING, TOKEN.WORD, TOKEN.RESERVED])) ||

      (in_array(next_token.text, ['get', 'set', '...']) && in_array(second_token.type, [TOKEN.WORD, TOKEN.RESERVED]))

    )) {

    // We don't support TypeScript,but we didn't break it for a very long time.

    // We'll try to keep not breaking it.

    if (in_array(this._last_last_text, ['class', 'interface']) && !in_array(second_token.text, [':', ','])) {

      this.set_mode(MODE.BlockStatement);

    } else {

      this.set_mode(MODE.ObjectLiteral);

    }

  } else if (this._flags.last_token.type === TOKEN.OPERATOR && this._flags.last_token.text === '=>') {

    // arrow function: (param1, paramN) => { statements }

    this.set_mode(MODE.BlockStatement);

  } else if (in_array(this._flags.last_token.type, [TOKEN.EQUALS, TOKEN.START_EXPR, TOKEN.COMMA, TOKEN.OPERATOR]) ||

    reserved_array(this._flags.last_token, ['return', 'throw', 'import', 'default'])

  ) {

    // Detecting shorthand function syntax is difficult by scanning forward,

    //     so check the surrounding context.

    // If the block is being returned, imported, export default, passed as arg,

    //     assigned with = or assigned in a nested object, treat as an ObjectLiteral.

    this.set_mode(MODE.ObjectLiteral);

  } else {

    this.set_mode(MODE.BlockStatement);

  }

  if (this._flags.last_token) {

    if (reserved_array(this._flags.last_token.previous, ['class', 'extends'])) {

      this._flags.class_start_block = true;

    }

  }

  var empty_braces = !next_token.comments_before && next_token.text === '}';

  var empty_anonymous_function = empty_braces && this._flags.last_word === 'function' &&

    this._flags.last_token.type === TOKEN.END_EXPR;

  if (this._options.brace_preserve_inline) // check for inline, set inline_frame if so

  {

    // search forward for a newline wanted inside this block

    var index = 0;

    var check_token = null;

    this._flags.inline_frame = true;

    do {

      index += 1;

      check_token = this._tokens.peek(index - 1);

      if (check_token.newlines) {

        this._flags.inline_frame = false;

        break;

      }

    } while (check_token.type !== TOKEN.EOF &&

      !(check_token.type === TOKEN.END_BLOCK && check_token.opened === current_token));

  }

  if ((this._options.brace_style === "expand" ||

      (this._options.brace_style === "none" && current_token.newlines)) &&

    !this._flags.inline_frame) {

    if (this._flags.last_token.type !== TOKEN.OPERATOR &&

      (empty_anonymous_function ||

        this._flags.last_token.type === TOKEN.EQUALS ||

        (reserved_array(this._flags.last_token, special_words) && this._flags.last_token.text !== 'else'))) {

      this._output.space_before_token = true;

    } else {

      this.print_newline(false, true);

    }

  } else { // collapse || inline_frame

    if (is_array(this._previous_flags.mode) && (this._flags.last_token.type === TOKEN.START_EXPR || this._flags.last_token.type === TOKEN.COMMA)) {

      if (this._flags.last_token.type === TOKEN.COMMA || this._options.space_in_paren) {

        this._output.space_before_token = true;

      }

      if (this._flags.last_token.type === TOKEN.COMMA || (this._flags.last_token.type === TOKEN.START_EXPR && this._flags.inline_frame)) {

        this.allow_wrap_or_preserved_newline(current_token);

        this._previous_flags.multiline_frame = this._previous_flags.multiline_frame || this._flags.multiline_frame;

        this._flags.multiline_frame = false;

      }

    }

    if (this._flags.last_token.type !== TOKEN.OPERATOR && this._flags.last_token.type !== TOKEN.START_EXPR) {

      if (in_array(this._flags.last_token.type, [TOKEN.START_BLOCK, TOKEN.SEMICOLON]) && !this._flags.inline_frame) {

        this.print_newline();

      } else {

        this._output.space_before_token = true;

      }

    }

  }

  this.print_token(current_token);

  this.indent();

  // Except for specific cases, open braces are followed by a new line.

  if (!empty_braces && !(this._options.brace_preserve_inline && this._flags.inline_frame)) {

    this.print_newline();

  }

};

Beautifier.prototype.handle_end_block = function(current_token) {

  // statements must all be closed when their container closes

  this.handle_whitespace_and_comments(current_token);

  while (this._flags.mode === MODE.Statement) {

    this.restore_mode();

  }

  var empty_braces = this._flags.last_token.type === TOKEN.START_BLOCK;

  if (this._flags.inline_frame && !empty_braces) { // try inline_frame (only set if this._options.braces-preserve-inline) first

    this._output.space_before_token = true;

  } else if (this._options.brace_style === "expand") {

    if (!empty_braces) {

      this.print_newline();

    }

  } else {

    // skip {}

    if (!empty_braces) {

      if (is_array(this._flags.mode) && this._options.keep_array_indentation) {

        // we REALLY need a newline here, but newliner would skip that

        this._options.keep_array_indentation = false;

        this.print_newline();

        this._options.keep_array_indentation = true;

      } else {

        this.print_newline();

      }

    }

  }

  this.restore_mode();

  this.print_token(current_token);

};

Beautifier.prototype.handle_word = function(current_token) {

  if (current_token.type === TOKEN.RESERVED) {

    if (in_array(current_token.text, ['set', 'get']) && this._flags.mode !== MODE.ObjectLiteral) {

      current_token.type = TOKEN.WORD;

    } else if (current_token.text === 'import' && in_array(this._tokens.peek().text, ['(', '.'])) {

      current_token.type = TOKEN.WORD;

    } else if (in_array(current_token.text, ['as', 'from']) && !this._flags.import_block) {

      current_token.type = TOKEN.WORD;

    } else if (this._flags.mode === MODE.ObjectLiteral) {

      var next_token = this._tokens.peek();

      if (next_token.text === ':') {

        current_token.type = TOKEN.WORD;

      }

    }

  }

  if (this.start_of_statement(current_token)) {

    // The conditional starts the statement if appropriate.

    if (reserved_array(this._flags.last_token, ['var', 'let', 'const']) && current_token.type === TOKEN.WORD) {

      this._flags.declaration_statement = true;

    }

  } else if (current_token.newlines && !is_expression(this._flags.mode) &&

    (this._flags.last_token.type !== TOKEN.OPERATOR || (this._flags.last_token.text === '--' || this._flags.last_token.text === '++')) &&

    this._flags.last_token.type !== TOKEN.EQUALS &&

    (this._options.preserve_newlines || !reserved_array(this._flags.last_token, ['var', 'let', 'const', 'set', 'get']))) {

    this.handle_whitespace_and_comments(current_token);