ntwb /
wordpress
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like WP_Customize_Control often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use WP_Customize_Control, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class WP_Customize_Control { |
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| 16 | |||
| 17 | /** |
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| 18 | * Incremented with each new class instantiation, then stored in $instance_number. |
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| 19 | * |
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| 20 | * Used when sorting two instances whose priorities are equal. |
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| 21 | * |
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| 22 | * @since 4.1.0 |
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| 23 | * |
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| 24 | * @static |
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| 25 | * @access protected |
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| 26 | * @var int |
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| 27 | */ |
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| 28 | protected static $instance_count = 0; |
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| 29 | |||
| 30 | /** |
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| 31 | * Order in which this instance was created in relation to other instances. |
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| 32 | * |
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| 33 | * @since 4.1.0 |
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| 34 | * @access public |
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| 35 | * @var int |
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| 36 | */ |
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| 37 | public $instance_number; |
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| 38 | |||
| 39 | /** |
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| 40 | * @access public |
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| 41 | * @var WP_Customize_Manager |
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| 42 | */ |
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| 43 | public $manager; |
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| 44 | |||
| 45 | /** |
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| 46 | * @access public |
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| 47 | * @var string |
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| 48 | */ |
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| 49 | public $id; |
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| 50 | |||
| 51 | /** |
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| 52 | * All settings tied to the control. |
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| 53 | * |
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| 54 | * @access public |
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| 55 | * @var array |
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| 56 | */ |
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| 57 | public $settings; |
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| 58 | |||
| 59 | /** |
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| 60 | * The primary setting for the control (if there is one). |
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| 61 | * |
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| 62 | * @access public |
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| 63 | * @var string |
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| 64 | */ |
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| 65 | public $setting = 'default'; |
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| 66 | |||
| 67 | /** |
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| 68 | * Capability required to use this control. |
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| 69 | * |
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| 70 | * Normally this is empty and the capability is derived from the capabilities |
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| 71 | * of the associated `$settings`. |
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| 72 | * |
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| 73 | * @since 4.5.0 |
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| 74 | * @access public |
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| 75 | * @var string |
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| 76 | */ |
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| 77 | public $capability; |
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| 78 | |||
| 79 | /** |
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| 80 | * @access public |
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| 81 | * @var int |
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| 82 | */ |
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| 83 | public $priority = 10; |
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| 84 | |||
| 85 | /** |
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| 86 | * @access public |
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| 87 | * @var string |
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| 88 | */ |
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| 89 | public $section = ''; |
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| 90 | |||
| 91 | /** |
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| 92 | * @access public |
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| 93 | * @var string |
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| 94 | */ |
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| 95 | public $label = ''; |
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| 96 | |||
| 97 | /** |
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| 98 | * @access public |
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| 99 | * @var string |
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| 100 | */ |
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| 101 | public $description = ''; |
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| 102 | |||
| 103 | /** |
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| 104 | * @todo: Remove choices |
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| 105 | * |
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| 106 | * @access public |
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| 107 | * @var array |
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| 108 | */ |
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| 109 | public $choices = array(); |
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| 110 | |||
| 111 | /** |
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| 112 | * @access public |
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| 113 | * @var array |
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| 114 | */ |
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| 115 | public $input_attrs = array(); |
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| 116 | |||
| 117 | /** |
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| 118 | * @deprecated It is better to just call the json() method |
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| 119 | * @access public |
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| 120 | * @var array |
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| 121 | */ |
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| 122 | public $json = array(); |
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| 123 | |||
| 124 | /** |
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| 125 | * @access public |
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| 126 | * @var string |
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| 127 | */ |
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| 128 | public $type = 'text'; |
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| 129 | |||
| 130 | /** |
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| 131 | * Callback. |
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| 132 | * |
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| 133 | * @since 4.0.0 |
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| 134 | * @access public |
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| 135 | * |
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| 136 | * @see WP_Customize_Control::active() |
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| 137 | * |
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| 138 | * @var callable Callback is called with one argument, the instance of |
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| 139 | * WP_Customize_Control, and returns bool to indicate whether |
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| 140 | * the control is active (such as it relates to the URL |
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| 141 | * currently being previewed). |
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| 142 | */ |
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| 143 | public $active_callback = ''; |
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| 144 | |||
| 145 | /** |
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| 146 | * Constructor. |
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| 147 | * |
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| 148 | * Supplied `$args` override class property defaults. |
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| 149 | * |
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| 150 | * If `$args['settings']` is not defined, use the $id as the setting ID. |
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| 151 | * |
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| 152 | * @since 3.4.0 |
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| 153 | * |
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| 154 | * @param WP_Customize_Manager $manager Customizer bootstrap instance. |
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| 155 | * @param string $id Control ID. |
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| 156 | * @param array $args { |
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| 157 | * Optional. Arguments to override class property defaults. |
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| 158 | * |
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| 159 | * @type int $instance_number Order in which this instance was created in relation |
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| 160 | * to other instances. |
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| 161 | * @type WP_Customize_Manager $manager Customizer bootstrap instance. |
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| 162 | * @type string $id Control ID. |
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| 163 | * @type array $settings All settings tied to the control. If undefined, `$id` will |
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| 164 | * be used. |
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| 165 | * @type string $setting The primary setting for the control (if there is one). |
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| 166 | * Default 'default'. |
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| 167 | * @type int $priority Order priority to load the control. Default 10. |
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| 168 | * @type string $section Section the control belongs to. Default empty. |
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| 169 | * @type string $label Label for the control. Default empty. |
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| 170 | * @type string $description Description for the control. Default empty. |
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| 171 | * @type array $choices List of choices for 'radio' or 'select' type controls, where |
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| 172 | * values are the keys, and labels are the values. |
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| 173 | * Default empty array. |
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| 174 | * @type array $input_attrs List of custom input attributes for control output, where |
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| 175 | * attribute names are the keys and values are the values. Not |
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| 176 | * used for 'checkbox', 'radio', 'select', 'textarea', or |
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| 177 | * 'dropdown-pages' control types. Default empty array. |
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| 178 | * @type array $json Deprecated. Use {@see WP_Customize_Control->json()} instead. |
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| 179 | * @type string $type Control type. Core controls include 'text', 'checkbox', |
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| 180 | * 'textarea', 'radio', 'select', and 'dropdown-pages'. Additional |
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| 181 | * input types such as 'email', 'url', 'number', 'hidden', and |
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| 182 | * 'date' are supported implicitly. Default 'text'. |
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| 183 | * } |
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| 184 | */ |
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| 185 | public function __construct( $manager, $id, $args = array() ) { |
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| 217 | |||
| 218 | /** |
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| 219 | * Enqueue control related scripts/styles. |
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| 220 | * |
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| 221 | * @since 3.4.0 |
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| 222 | */ |
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| 223 | public function enqueue() {} |
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| 224 | |||
| 225 | /** |
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| 226 | * Check whether control is active to current Customizer preview. |
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| 227 | * |
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| 228 | * @since 4.0.0 |
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| 229 | * @access public |
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| 230 | * |
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| 231 | * @return bool Whether the control is active to the current preview. |
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| 232 | */ |
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| 233 | final public function active() { |
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| 249 | |||
| 250 | /** |
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| 251 | * Default callback used when invoking WP_Customize_Control::active(). |
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| 252 | * |
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| 253 | * Subclasses can override this with their specific logic, or they may |
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| 254 | * provide an 'active_callback' argument to the constructor. |
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| 255 | * |
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| 256 | * @since 4.0.0 |
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| 257 | * @access public |
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| 258 | * |
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| 259 | * @return true Always true. |
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| 260 | */ |
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| 261 | public function active_callback() { |
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| 264 | |||
| 265 | /** |
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| 266 | * Fetch a setting's value. |
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| 267 | * Grabs the main setting by default. |
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| 268 | * |
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| 269 | * @since 3.4.0 |
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| 270 | * |
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| 271 | * @param string $setting_key |
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| 272 | * @return mixed The requested setting's value, if the setting exists. |
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| 273 | */ |
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| 274 | final public function value( $setting_key = 'default' ) { |
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| 279 | |||
| 280 | /** |
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| 281 | * Refresh the parameters passed to the JavaScript via JSON. |
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| 282 | * |
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| 283 | * @since 3.4.0 |
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| 284 | */ |
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| 285 | public function to_json() { |
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| 300 | |||
| 301 | /** |
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| 302 | * Get the data to export to the client via JSON. |
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| 303 | * |
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| 304 | * @since 4.1.0 |
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| 305 | * |
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| 306 | * @return array Array of parameters passed to the JavaScript. |
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| 307 | */ |
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| 308 | public function json() { |
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| 312 | |||
| 313 | /** |
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| 314 | * Checks if the user can use this control. |
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| 315 | * |
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| 316 | * Returns false if the user cannot manipulate one of the associated settings, |
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| 317 | * or if one of the associated settings does not exist. Also returns false if |
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| 318 | * the associated section does not exist or if its capability check returns |
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| 319 | * false. |
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| 320 | * |
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| 321 | * @since 3.4.0 |
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| 322 | * |
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| 323 | * @return bool False if theme doesn't support the control or user doesn't have the required permissions, otherwise true. |
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| 324 | */ |
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| 325 | final public function check_capabilities() { |
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| 343 | |||
| 344 | /** |
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| 345 | * Get the control's content for insertion into the Customizer pane. |
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| 346 | * |
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| 347 | * @since 4.1.0 |
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| 348 | * |
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| 349 | * @return string Contents of the control. |
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| 350 | */ |
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| 351 | final public function get_content() { |
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| 356 | |||
| 357 | /** |
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| 358 | * Check capabilities and render the control. |
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| 359 | * |
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| 360 | * @since 3.4.0 |
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| 361 | * @uses WP_Customize_Control::render() |
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| 362 | */ |
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| 363 | final public function maybe_render() { |
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| 390 | |||
| 391 | /** |
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| 392 | * Renders the control wrapper and calls $this->render_content() for the internals. |
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| 393 | * |
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| 394 | * @since 3.4.0 |
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| 395 | */ |
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| 396 | protected function render() { |
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| 404 | |||
| 405 | /** |
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| 406 | * Get the data link attribute for a setting. |
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| 407 | * |
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| 408 | * @since 3.4.0 |
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| 409 | * |
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| 410 | * @param string $setting_key |
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| 411 | * @return string Data link parameter, if $setting_key is a valid setting, empty string otherwise. |
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| 412 | */ |
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| 413 | public function get_link( $setting_key = 'default' ) { |
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| 419 | |||
| 420 | /** |
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| 421 | * Render the data link attribute for the control's input element. |
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| 422 | * |
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| 423 | * @since 3.4.0 |
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| 424 | * @uses WP_Customize_Control::get_link() |
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| 425 | * |
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| 426 | * @param string $setting_key |
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| 427 | */ |
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| 428 | public function link( $setting_key = 'default' ) { |
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| 431 | |||
| 432 | /** |
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| 433 | * Render the custom attributes for the control's input element. |
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| 434 | * |
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| 435 | * @since 4.0.0 |
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| 436 | * @access public |
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| 437 | */ |
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| 438 | public function input_attrs() { |
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| 443 | |||
| 444 | /** |
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| 445 | * Render the control's content. |
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| 446 | * |
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| 447 | * Allows the content to be overriden without having to rewrite the wrapper in $this->render(). |
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| 448 | * |
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| 449 | * Supports basic input types `text`, `checkbox`, `textarea`, `radio`, `select` and `dropdown-pages`. |
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| 450 | * Additional input types such as `email`, `url`, `number`, `hidden` and `date` are supported implicitly. |
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| 451 | * |
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| 452 | * Control content can alternately be rendered in JS. See {@see WP_Customize_Control::print_template()}. |
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| 453 | * |
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| 454 | * @since 3.4.0 |
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| 455 | */ |
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| 456 | protected function render_content() { |
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| 568 | |||
| 569 | /** |
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| 570 | * Render the control's JS template. |
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| 571 | * |
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| 572 | * This function is only run for control types that have been registered with |
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| 573 | * {@see WP_Customize_Manager::register_control_type()}. |
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| 574 | * |
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| 575 | * In the future, this will also print the template for the control's container |
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| 576 | * element and be override-able. |
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| 577 | * |
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| 578 | * @since 4.1.0 |
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| 579 | */ |
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| 580 | final public function print_template() { |
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| 587 | |||
| 588 | /** |
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| 589 | * An Underscore (JS) template for this control's content (but not its container). |
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| 590 | * |
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| 591 | * Class variables for this control class are available in the `data` JS object; |
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| 592 | * export custom variables by overriding {@see WP_Customize_Control::to_json()}. |
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| 593 | * |
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| 594 | * @see WP_Customize_Control::print_template() |
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| 595 | * |
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| 596 | * @since 4.1.0 |
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| 597 | */ |
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| 598 | protected function content_template() {} |
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| 599 | |||
| 600 | } |
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| 601 | |||
| 652 |
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Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..