markdown_helpers.js

if (typeof define !== 'function') { var define = require('amdefine')(module) }

define([], function (w) {

  var MarkdownHelpers = {};

  // For Spidermonkey based engines
  function mk_block_toSource() {
    return "Markdown.mk_block( " +
            uneval(this.toString()) +
            ", " +
            uneval(this.trailing) +
            ", " +
            uneval(this.lineNumber) +
            " )";
  }

  // node
  function mk_block_inspect() {
    var util = require("util");
    return "Markdown.mk_block( " +
            util.inspect(this.toString()) +
            ", " +
            util.inspect(this.trailing) +
            ", " +
            util.inspect(this.lineNumber) +
            " )";

  }

  MarkdownHelpers.mk_block = function(block, trail, line) {
    // Be helpful for default case in tests.
    if ( arguments.length === 1 )
      trail = "\n\n";

    // We actually need a String object, not a string primitive
    /* jshint -W053 */
    var s = new String(block);
    s.trailing = trail;
    // To make it clear its not just a string
    s.inspect = mk_block_inspect;
    s.toSource = mk_block_toSource;

    if ( line !== undefined )
      s.lineNumber = line;

    return s;
  };


  var isArray = MarkdownHelpers.isArray = Array.isArray || function(obj) {
    return Object.prototype.toString.call(obj) === "[object Array]";
  };

  // Don't mess with Array.prototype. Its not friendly
  if ( Array.prototype.forEach ) {
    MarkdownHelpers.forEach = function forEach( arr, cb, thisp ) {
      return arr.forEach( cb, thisp );
    };
  }
  else {
    MarkdownHelpers.forEach = function forEach(arr, cb, thisp) {
      for (var i = 0; i < arr.length; i++)
        cb.call(thisp || arr, arr[i], i, arr);
    };
  }

  MarkdownHelpers.isEmpty = function isEmpty( obj ) {
    for ( var key in obj ) {
      if ( hasOwnProperty.call( obj, key ) )
        return false;
    }
    return true;
  };

  MarkdownHelpers.extract_attr = function extract_attr( jsonml ) {
    return isArray(jsonml)
        && jsonml.length > 1
        && typeof jsonml[ 1 ] === "object"
        && !( isArray(jsonml[ 1 ]) )
        ? jsonml[ 1 ]
        : undefined;
  };

  return MarkdownHelpers;

});