| Index: trunk/extensions/VisualEditor/modules/es/es.JsonSerializer.js |
| — | — | @@ -0,0 +1,100 @@ |
| | 2 | +/** |
| | 3 | + * Serializes a WikiDom into JSON. |
| | 4 | + * |
| | 5 | + * @class |
| | 6 | + * @constructor |
| | 7 | + * @extends {es.Serializer} |
| | 8 | + * @property options {Object} List of options for serialization |
| | 9 | + * @property options.indentWith {String} Text to use as indentation, such as \t or 4 spaces |
| | 10 | + */ |
| | 11 | +es.JsonSerializer = function( options ) { |
| | 12 | + es.Serializer.call( this ); |
| | 13 | + this.options = $.extend( { |
| | 14 | + 'indentWith': '\t' |
| | 15 | + }, options || {} ); |
| | 16 | +}; |
| | 17 | + |
| | 18 | +/* Static Methods */ |
| | 19 | + |
| | 20 | +es.JsonSerializer.typeOf = function( value ) { |
| | 21 | + if ( typeof value === 'object' ) { |
| | 22 | + if ( value === null ) { |
| | 23 | + return 'null'; |
| | 24 | + } |
| | 25 | + switch ( value.constructor ) { |
| | 26 | + case [].constructor: |
| | 27 | + return 'array'; |
| | 28 | + case ( new Date() ).constructor: |
| | 29 | + return 'date'; |
| | 30 | + case ( new RegExp() ).constructor: |
| | 31 | + return 'regex'; |
| | 32 | + default: |
| | 33 | + return 'object'; |
| | 34 | + } |
| | 35 | + } |
| | 36 | + return typeof value; |
| | 37 | +}; |
| | 38 | + |
| | 39 | +es.JsonSerializer.prototype.encode = function( data, indention ) { |
| | 40 | + if ( indention === undefined ) { |
| | 41 | + indention = ''; |
| | 42 | + } |
| | 43 | + var type = es.JsonSerializer.typeOf( data ), |
| | 44 | + key; |
| | 45 | + |
| | 46 | + // Open object/array |
| | 47 | + var json = ''; |
| | 48 | + if ( type === 'array' ) { |
| | 49 | + if (data.length === 0) { |
| | 50 | + // Empty array |
| | 51 | + return '[]'; |
| | 52 | + } |
| | 53 | + json += '['; |
| | 54 | + } else { |
| | 55 | + var empty = true; |
| | 56 | + for ( key in data ) { |
| | 57 | + if ( data.hasOwnProperty( key ) ) { |
| | 58 | + empty = false; |
| | 59 | + break; |
| | 60 | + } |
| | 61 | + } |
| | 62 | + if ( empty ) { |
| | 63 | + return '{}'; |
| | 64 | + } |
| | 65 | + json += '{'; |
| | 66 | + } |
| | 67 | + |
| | 68 | + // Iterate over items |
| | 69 | + var comma = false; |
| | 70 | + for ( key in data ) { |
| | 71 | + if ( data.hasOwnProperty( key ) ) { |
| | 72 | + json += ( comma ? ',' : '' ) + '\n' + indention + this.options.indentWith + |
| | 73 | + ( type === 'array' ? '' : '"' + key + '"' + ': ' ); |
| | 74 | + switch ( es.JsonSerializer.typeOf( data[key] ) ) { |
| | 75 | + case 'array': |
| | 76 | + case 'object': |
| | 77 | + json += this.encode( data[key], indention + this.options.indentWith ); |
| | 78 | + break; |
| | 79 | + case 'boolean': |
| | 80 | + case 'number': |
| | 81 | + json += data[key].toString(); |
| | 82 | + break; |
| | 83 | + case 'null': |
| | 84 | + json += 'null'; |
| | 85 | + break; |
| | 86 | + case 'string': |
| | 87 | + json += '"' + data[key] |
| | 88 | + .replace(/[\n]/g, '\\n') |
| | 89 | + .replace(/[\t]/g, '\\t') + '"'; |
| | 90 | + break; |
| | 91 | + // Skip other types |
| | 92 | + } |
| | 93 | + comma = true; |
| | 94 | + } |
| | 95 | + } |
| | 96 | + |
| | 97 | + // Close object/array |
| | 98 | + json += '\n' + indention + ( type === 'array' ? ']' : '}' ); |
| | 99 | + |
| | 100 | + return json; |
| | 101 | +}; |