1 if ( typeof wp === 'undefined' ) |
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2 var wp = {}; |
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3 |
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4 (function( exports, $ ){ |
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5 var api, extend, ctor, inherits, |
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6 slice = Array.prototype.slice; |
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7 |
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8 /* ===================================================================== |
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9 * Micro-inheritance - thank you, backbone.js. |
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10 * ===================================================================== */ |
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11 |
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12 extend = function( protoProps, classProps ) { |
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13 var child = inherits( this, protoProps, classProps ); |
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14 child.extend = this.extend; |
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15 return child; |
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16 }; |
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17 |
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18 // Shared empty constructor function to aid in prototype-chain creation. |
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19 ctor = function() {}; |
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20 |
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21 // Helper function to correctly set up the prototype chain, for subclasses. |
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22 // Similar to `goog.inherits`, but uses a hash of prototype properties and |
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23 // class properties to be extended. |
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24 inherits = function( parent, protoProps, staticProps ) { |
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25 var child; |
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26 |
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27 // The constructor function for the new subclass is either defined by you |
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28 // (the "constructor" property in your `extend` definition), or defaulted |
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29 // by us to simply call `super()`. |
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30 if ( protoProps && protoProps.hasOwnProperty( 'constructor' ) ) { |
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31 child = protoProps.constructor; |
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32 } else { |
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33 child = function() { |
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34 // Storing the result `super()` before returning the value |
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35 // prevents a bug in Opera where, if the constructor returns |
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36 // a function, Opera will reject the return value in favor of |
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37 // the original object. This causes all sorts of trouble. |
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38 var result = parent.apply( this, arguments ); |
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39 return result; |
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40 }; |
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41 } |
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42 |
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43 // Inherit class (static) properties from parent. |
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44 $.extend( child, parent ); |
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45 |
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46 // Set the prototype chain to inherit from `parent`, without calling |
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47 // `parent`'s constructor function. |
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48 ctor.prototype = parent.prototype; |
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49 child.prototype = new ctor(); |
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50 |
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51 // Add prototype properties (instance properties) to the subclass, |
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52 // if supplied. |
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53 if ( protoProps ) |
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54 $.extend( child.prototype, protoProps ); |
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55 |
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56 // Add static properties to the constructor function, if supplied. |
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57 if ( staticProps ) |
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58 $.extend( child, staticProps ); |
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59 |
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60 // Correctly set child's `prototype.constructor`. |
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61 child.prototype.constructor = child; |
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62 |
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63 // Set a convenience property in case the parent's prototype is needed later. |
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64 child.__super__ = parent.prototype; |
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65 |
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66 return child; |
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67 }; |
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68 |
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69 api = {}; |
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70 |
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71 /* ===================================================================== |
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72 * Base class. |
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73 * ===================================================================== */ |
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74 |
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75 api.Class = function( applicator, argsArray, options ) { |
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76 var magic, args = arguments; |
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77 |
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78 if ( applicator && argsArray && api.Class.applicator === applicator ) { |
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79 args = argsArray; |
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80 $.extend( this, options || {} ); |
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81 } |
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82 |
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83 magic = this; |
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84 if ( this.instance ) { |
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85 magic = function() { |
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86 return magic.instance.apply( magic, arguments ); |
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87 }; |
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88 |
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89 $.extend( magic, this ); |
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90 } |
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91 |
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92 magic.initialize.apply( magic, args ); |
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93 return magic; |
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94 }; |
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95 |
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96 api.Class.applicator = {}; |
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97 |
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98 api.Class.prototype.initialize = function() {}; |
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99 |
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100 /* |
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101 * Checks whether a given instance extended a constructor. |
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102 * |
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103 * The magic surrounding the instance parameter causes the instanceof |
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104 * keyword to return inaccurate results; it defaults to the function's |
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105 * prototype instead of the constructor chain. Hence this function. |
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106 */ |
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107 api.Class.prototype.extended = function( constructor ) { |
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108 var proto = this; |
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109 |
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110 while ( typeof proto.constructor !== 'undefined' ) { |
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111 if ( proto.constructor === constructor ) |
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112 return true; |
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113 if ( typeof proto.constructor.__super__ === 'undefined' ) |
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114 return false; |
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115 proto = proto.constructor.__super__; |
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116 } |
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117 return false; |
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118 }; |
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119 |
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120 api.Class.extend = extend; |
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121 |
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122 /* ===================================================================== |
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123 * Events mixin. |
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124 * ===================================================================== */ |
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125 |
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126 api.Events = { |
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127 trigger: function( id ) { |
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128 if ( this.topics && this.topics[ id ] ) |
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129 this.topics[ id ].fireWith( this, slice.call( arguments, 1 ) ); |
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130 return this; |
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131 }, |
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132 |
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133 bind: function( id, callback ) { |
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134 this.topics = this.topics || {}; |
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135 this.topics[ id ] = this.topics[ id ] || $.Callbacks(); |
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136 this.topics[ id ].add.apply( this.topics[ id ], slice.call( arguments, 1 ) ); |
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137 return this; |
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138 }, |
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139 |
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140 unbind: function( id, callback ) { |
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141 if ( this.topics && this.topics[ id ] ) |
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142 this.topics[ id ].remove.apply( this.topics[ id ], slice.call( arguments, 1 ) ); |
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143 return this; |
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144 } |
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145 }; |
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146 |
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147 /* ===================================================================== |
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148 * Observable values that support two-way binding. |
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149 * ===================================================================== */ |
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150 |
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151 api.Value = api.Class.extend({ |
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152 initialize: function( initial, options ) { |
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153 this._value = initial; // @todo: potentially change this to a this.set() call. |
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154 this.callbacks = $.Callbacks(); |
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155 |
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156 $.extend( this, options || {} ); |
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157 |
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158 this.set = $.proxy( this.set, this ); |
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159 }, |
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160 |
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161 /* |
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162 * Magic. Returns a function that will become the instance. |
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163 * Set to null to prevent the instance from extending a function. |
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164 */ |
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165 instance: function() { |
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166 return arguments.length ? this.set.apply( this, arguments ) : this.get(); |
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167 }, |
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168 |
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169 get: function() { |
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170 return this._value; |
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171 }, |
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172 |
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173 set: function( to ) { |
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174 var from = this._value; |
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175 |
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176 to = this._setter.apply( this, arguments ); |
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177 to = this.validate( to ); |
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178 |
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179 // Bail if the sanitized value is null or unchanged. |
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180 if ( null === to || this._value === to ) |
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181 return this; |
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182 |
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183 this._value = to; |
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184 |
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185 this.callbacks.fireWith( this, [ to, from ] ); |
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186 |
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187 return this; |
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188 }, |
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189 |
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190 _setter: function( to ) { |
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191 return to; |
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192 }, |
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193 |
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194 setter: function( callback ) { |
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195 var from = this.get(); |
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196 this._setter = callback; |
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197 // Temporarily clear value so setter can decide if it's valid. |
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198 this._value = null; |
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199 this.set( from ); |
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200 return this; |
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201 }, |
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202 |
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203 resetSetter: function() { |
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204 this._setter = this.constructor.prototype._setter; |
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205 this.set( this.get() ); |
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206 return this; |
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207 }, |
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208 |
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209 validate: function( value ) { |
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210 return value; |
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211 }, |
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212 |
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213 bind: function( callback ) { |
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214 this.callbacks.add.apply( this.callbacks, arguments ); |
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215 return this; |
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216 }, |
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217 |
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218 unbind: function( callback ) { |
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219 this.callbacks.remove.apply( this.callbacks, arguments ); |
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220 return this; |
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221 }, |
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222 |
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223 link: function() { // values* |
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224 var set = this.set; |
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225 $.each( arguments, function() { |
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226 this.bind( set ); |
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227 }); |
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228 return this; |
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229 }, |
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230 |
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231 unlink: function() { // values* |
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232 var set = this.set; |
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233 $.each( arguments, function() { |
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234 this.unbind( set ); |
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235 }); |
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236 return this; |
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237 }, |
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238 |
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239 sync: function() { // values* |
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240 var that = this; |
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241 $.each( arguments, function() { |
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242 that.link( this ); |
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243 this.link( that ); |
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244 }); |
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245 return this; |
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246 }, |
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247 |
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248 unsync: function() { // values* |
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249 var that = this; |
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250 $.each( arguments, function() { |
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251 that.unlink( this ); |
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252 this.unlink( that ); |
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253 }); |
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254 return this; |
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255 } |
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256 }); |
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257 |
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258 /* ===================================================================== |
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259 * A collection of observable values. |
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260 * ===================================================================== */ |
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261 |
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262 api.Values = api.Class.extend({ |
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263 defaultConstructor: api.Value, |
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264 |
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265 initialize: function( options ) { |
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266 $.extend( this, options || {} ); |
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267 |
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268 this._value = {}; |
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269 this._deferreds = {}; |
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270 }, |
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271 |
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272 instance: function( id ) { |
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273 if ( arguments.length === 1 ) |
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274 return this.value( id ); |
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275 |
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276 return this.when.apply( this, arguments ); |
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277 }, |
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278 |
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279 value: function( id ) { |
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280 return this._value[ id ]; |
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281 }, |
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282 |
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283 has: function( id ) { |
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284 return typeof this._value[ id ] !== 'undefined'; |
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285 }, |
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286 |
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287 add: function( id, value ) { |
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288 if ( this.has( id ) ) |
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289 return this.value( id ); |
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290 |
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291 this._value[ id ] = value; |
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292 value.parent = this; |
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293 if ( value.extended( api.Value ) ) |
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294 value.bind( this._change ); |
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295 |
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296 this.trigger( 'add', value ); |
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297 |
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298 if ( this._deferreds[ id ] ) |
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299 this._deferreds[ id ].resolve(); |
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300 |
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301 return this._value[ id ]; |
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302 }, |
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303 |
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304 create: function( id ) { |
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305 return this.add( id, new this.defaultConstructor( api.Class.applicator, slice.call( arguments, 1 ) ) ); |
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306 }, |
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307 |
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308 each: function( callback, context ) { |
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309 context = typeof context === 'undefined' ? this : context; |
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310 |
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311 $.each( this._value, function( key, obj ) { |
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312 callback.call( context, obj, key ); |
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313 }); |
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314 }, |
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315 |
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316 remove: function( id ) { |
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317 var value; |
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318 |
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319 if ( this.has( id ) ) { |
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320 value = this.value( id ); |
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321 this.trigger( 'remove', value ); |
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322 if ( value.extended( api.Value ) ) |
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323 value.unbind( this._change ); |
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324 delete value.parent; |
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325 } |
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326 |
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327 delete this._value[ id ]; |
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328 delete this._deferreds[ id ]; |
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329 }, |
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330 |
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331 /** |
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332 * Runs a callback once all requested values exist. |
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333 * |
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334 * when( ids*, [callback] ); |
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335 * |
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336 * For example: |
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337 * when( id1, id2, id3, function( value1, value2, value3 ) {} ); |
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338 * |
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339 * @returns $.Deferred.promise(); |
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340 */ |
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341 when: function() { |
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342 var self = this, |
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343 ids = slice.call( arguments ), |
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344 dfd = $.Deferred(); |
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345 |
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346 // If the last argument is a callback, bind it to .done() |
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347 if ( $.isFunction( ids[ ids.length - 1 ] ) ) |
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348 dfd.done( ids.pop() ); |
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349 |
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350 $.when.apply( $, $.map( ids, function( id ) { |
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351 if ( self.has( id ) ) |
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352 return; |
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353 |
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354 return self._deferreds[ id ] = self._deferreds[ id ] || $.Deferred(); |
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355 })).done( function() { |
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356 var values = $.map( ids, function( id ) { |
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357 return self( id ); |
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358 }); |
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359 |
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360 // If a value is missing, we've used at least one expired deferred. |
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361 // Call Values.when again to generate a new deferred. |
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362 if ( values.length !== ids.length ) { |
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363 // ids.push( callback ); |
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364 self.when.apply( self, ids ).done( function() { |
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365 dfd.resolveWith( self, values ); |
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366 }); |
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367 return; |
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368 } |
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369 |
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370 dfd.resolveWith( self, values ); |
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371 }); |
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372 |
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373 return dfd.promise(); |
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374 }, |
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375 |
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376 _change: function() { |
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377 this.parent.trigger( 'change', this ); |
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378 } |
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379 }); |
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380 |
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381 $.extend( api.Values.prototype, api.Events ); |
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382 |
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383 /* ===================================================================== |
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384 * An observable value that syncs with an element. |
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385 * |
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386 * Handles inputs, selects, and textareas by default. |
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387 * ===================================================================== */ |
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388 |
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389 api.ensure = function( element ) { |
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390 return typeof element == 'string' ? $( element ) : element; |
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391 }; |
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392 |
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393 api.Element = api.Value.extend({ |
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394 initialize: function( element, options ) { |
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395 var self = this, |
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396 synchronizer = api.Element.synchronizer.html, |
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397 type, update, refresh; |
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398 |
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399 this.element = api.ensure( element ); |
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400 this.events = ''; |
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401 |
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402 if ( this.element.is('input, select, textarea') ) { |
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403 this.events += 'change'; |
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404 synchronizer = api.Element.synchronizer.val; |
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405 |
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406 if ( this.element.is('input') ) { |
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407 type = this.element.prop('type'); |
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408 if ( api.Element.synchronizer[ type ] ) |
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409 synchronizer = api.Element.synchronizer[ type ]; |
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410 if ( 'text' === type || 'password' === type ) |
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411 this.events += ' keyup'; |
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412 } else if ( this.element.is('textarea') ) { |
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413 this.events += ' keyup'; |
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414 } |
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415 } |
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416 |
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417 api.Value.prototype.initialize.call( this, null, $.extend( options || {}, synchronizer ) ); |
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418 this._value = this.get(); |
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419 |
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420 update = this.update; |
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421 refresh = this.refresh; |
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422 |
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423 this.update = function( to ) { |
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424 if ( to !== refresh.call( self ) ) |
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425 update.apply( this, arguments ); |
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426 }; |
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427 this.refresh = function() { |
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428 self.set( refresh.call( self ) ); |
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429 }; |
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430 |
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431 this.bind( this.update ); |
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432 this.element.bind( this.events, this.refresh ); |
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433 }, |
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434 |
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435 find: function( selector ) { |
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436 return $( selector, this.element ); |
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437 }, |
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438 |
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439 refresh: function() {}, |
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440 |
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441 update: function() {} |
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442 }); |
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443 |
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444 api.Element.synchronizer = {}; |
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445 |
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446 $.each( [ 'html', 'val' ], function( i, method ) { |
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447 api.Element.synchronizer[ method ] = { |
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448 update: function( to ) { |
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449 this.element[ method ]( to ); |
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450 }, |
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451 refresh: function() { |
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452 return this.element[ method ](); |
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453 } |
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454 }; |
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455 }); |
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456 |
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457 api.Element.synchronizer.checkbox = { |
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458 update: function( to ) { |
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459 this.element.prop( 'checked', to ); |
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460 }, |
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461 refresh: function() { |
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462 return this.element.prop( 'checked' ); |
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463 } |
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464 }; |
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465 |
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466 api.Element.synchronizer.radio = { |
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467 update: function( to ) { |
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468 this.element.filter( function() { |
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469 return this.value === to; |
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470 }).prop( 'checked', true ); |
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471 }, |
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472 refresh: function() { |
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473 return this.element.filter( ':checked' ).val(); |
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474 } |
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475 }; |
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476 |
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477 /* ===================================================================== |
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478 * Messenger for postMessage. |
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479 * ===================================================================== */ |
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480 |
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481 $.support.postMessage = !! window.postMessage; |
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482 |
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483 api.Messenger = api.Class.extend({ |
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484 add: function( key, initial, options ) { |
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485 return this[ key ] = new api.Value( initial, options ); |
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486 }, |
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487 |
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488 /** |
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489 * Initialize Messenger. |
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490 * |
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491 * @param {object} params Parameters to configure the messenger. |
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492 * {string} .url The URL to communicate with. |
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493 * {window} .targetWindow The window instance to communicate with. Default window.parent. |
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494 * {string} .channel If provided, will send the channel with each message and only accept messages a matching channel. |
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495 * @param {object} options Extend any instance parameter or method with this object. |
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496 */ |
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497 initialize: function( params, options ) { |
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498 // Target the parent frame by default, but only if a parent frame exists. |
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499 var defaultTarget = window.parent == window ? null : window.parent; |
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500 |
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501 $.extend( this, options || {} ); |
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502 |
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503 this.add( 'channel', params.channel ); |
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504 this.add( 'url', params.url || '' ); |
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505 this.add( 'targetWindow', params.targetWindow || defaultTarget ); |
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506 this.add( 'origin', this.url() ).link( this.url ).setter( function( to ) { |
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507 return to.replace( /([^:]+:\/\/[^\/]+).*/, '$1' ); |
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508 }); |
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509 |
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510 // Since we want jQuery to treat the receive function as unique |
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511 // to this instance, we give the function a new guid. |
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512 // |
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513 // This will prevent every Messenger's receive function from being |
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514 // unbound when calling $.off( 'message', this.receive ); |
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515 this.receive = $.proxy( this.receive, this ); |
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516 this.receive.guid = $.guid++; |
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517 |
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518 $( window ).on( 'message', this.receive ); |
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519 }, |
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520 |
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521 destroy: function() { |
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522 $( window ).off( 'message', this.receive ); |
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523 }, |
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524 |
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525 receive: function( event ) { |
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526 var message; |
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527 |
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528 event = event.originalEvent; |
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529 |
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530 if ( ! this.targetWindow() ) |
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531 return; |
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532 |
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533 // Check to make sure the origin is valid. |
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534 if ( this.origin() && event.origin !== this.origin() ) |
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535 return; |
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536 |
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537 message = JSON.parse( event.data ); |
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538 |
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539 // Check required message properties. |
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540 if ( ! message || ! message.id || typeof message.data === 'undefined' ) |
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541 return; |
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542 |
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543 // Check if channel names match. |
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544 if ( ( message.channel || this.channel() ) && this.channel() !== message.channel ) |
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545 return; |
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546 |
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547 this.trigger( message.id, message.data ); |
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548 }, |
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549 |
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550 send: function( id, data ) { |
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551 var message; |
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552 |
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553 data = typeof data === 'undefined' ? null : data; |
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554 |
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555 if ( ! this.url() || ! this.targetWindow() ) |
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556 return; |
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557 |
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558 message = { id: id, data: data }; |
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559 if ( this.channel() ) |
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560 message.channel = this.channel(); |
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561 |
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562 this.targetWindow().postMessage( JSON.stringify( message ), this.origin() ); |
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563 } |
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564 }); |
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565 |
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566 // Add the Events mixin to api.Messenger. |
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567 $.extend( api.Messenger.prototype, api.Events ); |
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568 |
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569 /* ===================================================================== |
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570 * Core customize object. |
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571 * ===================================================================== */ |
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572 |
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573 api = $.extend( new api.Values(), api ); |
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574 api.get = function() { |
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575 var result = {}; |
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576 |
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577 this.each( function( obj, key ) { |
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578 result[ key ] = obj.get(); |
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579 }); |
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580 |
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581 return result; |
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582 }; |
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583 |
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584 // Expose the API to the world. |
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585 exports.customize = api; |
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586 })( wp, jQuery ); |
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