WebDevStudios /
CMB2
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 CMB2_Field 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 CMB2_Field, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 17 | class CMB2_Field extends CMB2_Base { |
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| 18 | |||
| 19 | /** |
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| 20 | * The object properties name. |
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| 21 | * @var string |
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| 22 | * @since 2.2.3 |
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| 23 | */ |
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| 24 | protected $properties_name = 'args'; |
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| 25 | |||
| 26 | /** |
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| 27 | * Field arguments |
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| 28 | * @var mixed |
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| 29 | * @since 1.1.0 |
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| 30 | */ |
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| 31 | public $args = array(); |
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| 32 | |||
| 33 | /** |
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| 34 | * Field group object or false (if no group) |
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| 35 | * @var mixed |
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| 36 | * @since 1.1.0 |
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| 37 | */ |
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| 38 | public $group = false; |
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| 39 | |||
| 40 | /** |
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| 41 | * Field meta value |
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| 42 | * @var mixed |
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| 43 | * @since 1.1.0 |
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| 44 | */ |
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| 45 | public $value = null; |
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| 46 | |||
| 47 | /** |
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| 48 | * Field meta value |
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| 49 | * @var mixed |
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| 50 | * @since 1.1.0 |
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| 51 | */ |
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| 52 | public $escaped_value = null; |
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| 53 | |||
| 54 | /** |
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| 55 | * Grouped Field's current numeric index during the save process |
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| 56 | * @var mixed |
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| 57 | * @since 2.0.0 |
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| 58 | */ |
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| 59 | public $index = 0; |
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| 60 | |||
| 61 | /** |
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| 62 | * Array of field options |
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| 63 | * @var array |
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| 64 | * @since 2.0.0 |
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| 65 | */ |
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| 66 | protected $field_options = array(); |
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| 67 | |||
| 68 | /** |
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| 69 | * Array of provided field text strings |
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| 70 | * @var array |
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| 71 | * @since 2.0.0 |
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| 72 | */ |
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| 73 | protected $strings; |
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| 74 | |||
| 75 | /** |
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| 76 | * The field's render context. In most cases, 'edit', but can be 'display'. |
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| 77 | * @var string |
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| 78 | * @since 2.2.2 |
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| 79 | */ |
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| 80 | public $render_context = 'edit'; |
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| 81 | |||
| 82 | /** |
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| 83 | * All CMB2_Field callable field arguments. |
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| 84 | * Can be used to determine if a field argument is callable. |
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| 85 | * |
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| 86 | * @var array |
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| 87 | */ |
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| 88 | public static $callable_fields = array( |
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| 89 | 'default', |
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| 90 | 'row_classes', |
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| 91 | 'options_cb', |
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| 92 | 'label_cb', |
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| 93 | 'render_row_cb', |
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| 94 | 'before_group', |
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| 95 | 'before_group_row', |
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| 96 | 'before_row', |
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| 97 | 'before', |
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| 98 | 'before_field', |
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| 99 | 'after_field', |
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| 100 | 'after', |
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| 101 | 'after_row', |
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| 102 | 'after_group_row', |
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| 103 | 'after_group', |
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| 104 | ); |
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| 105 | |||
| 106 | /** |
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| 107 | * Constructs our field object |
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| 108 | * @since 1.1.0 |
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| 109 | * @param array $args Field arguments |
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| 110 | */ |
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| 111 | 109 | public function __construct( $args ) { |
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| 112 | |||
| 113 | 109 | if ( ! empty( $args['group_field'] ) ) { |
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| 114 | 3 | $this->group = $args['group_field']; |
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| 115 | 3 | $this->object_id = $this->group->object_id; |
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| 116 | 3 | $this->object_type = $this->group->object_type; |
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| 117 | 3 | $this->cmb_id = $this->group->cmb_id; |
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| 118 | 3 | } else { |
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| 119 | 109 | $this->object_id = isset( $args['object_id'] ) && '_' !== $args['object_id'] ? $args['object_id'] : 0; |
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| 120 | 109 | $this->object_type = isset( $args['object_type'] ) ? $args['object_type'] : 'post'; |
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| 121 | |||
| 122 | 109 | if ( isset( $args['cmb_id'] ) ) { |
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| 123 | 40 | $this->cmb_id = $args['cmb_id']; |
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| 124 | 40 | } |
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| 125 | } |
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| 126 | |||
| 127 | 109 | $this->args = $this->_set_field_defaults( $args['field_args'], $args ); |
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| 128 | |||
| 129 | 109 | if ( $this->object_id ) { |
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| 130 | 103 | $this->value = $this->get_data(); |
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| 131 | 103 | } |
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| 132 | 109 | } |
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| 133 | |||
| 134 | /** |
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| 135 | * Non-existent methods fallback to checking for field arguments of the same name |
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| 136 | * @since 1.1.0 |
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| 137 | * @param string $name Method name |
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| 138 | * @param array $arguments Array of passed-in arguments |
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| 139 | * @return mixed Value of field argument |
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| 140 | */ |
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| 141 | 97 | public function __call( $name, $arguments ) { |
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| 142 | 97 | if ( 'string' === $name ) { |
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| 143 | return call_user_func_array( array( $this, 'get_string' ), $arguments ); |
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| 144 | } |
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| 145 | |||
| 146 | 97 | $key = isset( $arguments[0] ) ? $arguments[0] : false; |
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| 147 | 97 | return $this->args( $name, $key ); |
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| 148 | } |
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| 149 | |||
| 150 | /** |
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| 151 | * Retrieves the field id |
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| 152 | * @since 1.1.0 |
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| 153 | * @param boolean $raw Whether to retrieve pre-modidifed id |
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| 154 | * @return string Field id |
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| 155 | */ |
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| 156 | 107 | public function id( $raw = false ) { |
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| 157 | 107 | $id = $raw ? '_id' : 'id'; |
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| 158 | 107 | return $this->args( $id ); |
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| 159 | } |
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| 160 | |||
| 161 | /** |
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| 162 | * Get a field argument |
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| 163 | * @since 1.1.0 |
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| 164 | * @param string $key Argument to check |
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| 165 | * @param string $_key Sub argument to check |
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| 166 | * @return mixed Argument value or false if non-existent |
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| 167 | */ |
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| 168 | 110 | public function args( $key = '', $_key = '' ) { |
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| 169 | 110 | $arg = $this->_data( 'args', $key ); |
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| 170 | |||
| 171 | 110 | if ( in_array( $key, array( 'default', 'default_cb' ), true ) ) { |
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| 172 | |||
| 173 | 1 | $arg = $this->get_default(); |
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| 174 | |||
| 175 | 110 | } elseif ( $_key ) { |
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| 176 | |||
| 177 | $arg = isset( $arg[ $_key ] ) ? $arg[ $_key ] : false; |
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| 178 | } |
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| 179 | |||
| 180 | 110 | return $arg; |
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| 181 | } |
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| 182 | |||
| 183 | /** |
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| 184 | * Retrieve a portion of a field property |
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| 185 | * @since 1.1.0 |
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| 186 | * @param string $var Field property to check |
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| 187 | * @param string $key Field property array key to check |
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| 188 | * @return mixed Queried property value or false |
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| 189 | */ |
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| 190 | 110 | public function _data( $var, $key = '' ) { |
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| 191 | 110 | $vars = $this->{$var}; |
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| 192 | 110 | if ( $key ) { |
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| 193 | 110 | return array_key_exists( $key, $vars ) ? $vars[ $key ] : false; |
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| 194 | } |
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| 195 | 59 | return $vars; |
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| 196 | } |
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| 197 | |||
| 198 | /** |
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| 199 | * Get Field's value |
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| 200 | * @since 1.1.0 |
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| 201 | * @param string $key If value is an array, is used to get array key->value |
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| 202 | * @return mixed Field value or false if non-existent |
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| 203 | */ |
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| 204 | 46 | public function value( $key = '' ) { |
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| 207 | |||
| 208 | /** |
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| 209 | * Retrieves metadata/option data |
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| 210 | * @since 1.0.1 |
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| 211 | * @param string $field_id Meta key/Option array key |
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| 212 | * @param array $args Override arguments |
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| 213 | * @return mixed Meta/Option value |
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| 214 | */ |
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| 215 | 105 | public function get_data( $field_id = '', $args = array() ) { |
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| 216 | 105 | if ( $field_id ) { |
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| 217 | $args['field_id'] = $field_id; |
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| 218 | 105 | } else if ( $this->group ) { |
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| 219 | $args['field_id'] = $this->group->id(); |
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| 220 | } |
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| 221 | |||
| 222 | 105 | $a = $this->data_args( $args ); |
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| 223 | |||
| 224 | /** |
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| 225 | * Filter whether to override getting of meta value. |
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| 226 | * Returning a non 'cmb2_field_no_override_val' value |
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| 227 | * will effectively short-circuit the value retrieval. |
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| 228 | * |
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| 229 | * @since 2.0.0 |
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| 230 | * |
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| 231 | * @param mixed $value The value get_metadata() should |
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| 232 | * return - a single metadata value, |
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| 233 | * or an array of values. |
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| 234 | * |
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| 235 | * @param int $object_id Object ID. |
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| 236 | * |
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| 237 | * @param array $args { |
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| 238 | * An array of arguments for retrieving data |
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| 239 | * |
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| 240 | * @type string $type The current object type |
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| 241 | * @type int $id The current object ID |
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| 242 | * @type string $field_id The ID of the field being requested |
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| 243 | * @type bool $repeat Whether current field is repeatable |
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| 244 | * @type bool $single Whether current field is a single database row |
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| 245 | * } |
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| 246 | * |
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| 247 | * @param CMB2_Field object $field This field object |
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| 248 | */ |
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| 249 | 105 | $data = apply_filters( 'cmb2_override_meta_value', 'cmb2_field_no_override_val', $this->object_id, $a, $this ); |
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| 250 | |||
| 251 | /** |
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| 252 | * Filter and parameters are documented for 'cmb2_override_meta_value' filter (above). |
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| 253 | * |
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| 254 | * The dynamic portion of the hook, $field_id, refers to the current |
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| 255 | * field id paramater. Returning a non 'cmb2_field_no_override_val' value |
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| 256 | * will effectively short-circuit the value retrieval. |
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| 257 | * |
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| 258 | * @since 2.0.0 |
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| 259 | */ |
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| 260 | 105 | $data = apply_filters( "cmb2_override_{$a['field_id']}_meta_value", $data, $this->object_id, $a, $this ); |
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| 261 | |||
| 262 | // If no override, get value normally |
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| 263 | 105 | if ( 'cmb2_field_no_override_val' === $data ) { |
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| 264 | 102 | $data = 'options-page' === $a['type'] |
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| 265 | 102 | ? cmb2_options( $a['id'] )->get( $a['field_id'] ) |
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| 266 | 102 | : get_metadata( $a['type'], $a['id'], $a['field_id'], ( $a['single'] || $a['repeat'] ) ); |
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| 267 | 102 | } |
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| 268 | |||
| 269 | 105 | if ( $this->group ) { |
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| 270 | |||
| 271 | $data = is_array( $data ) && isset( $data[ $this->group->index ][ $this->args( '_id' ) ] ) |
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| 272 | ? $data[ $this->group->index ][ $this->args( '_id' ) ] |
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| 273 | : false; |
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| 274 | } |
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| 275 | |||
| 276 | 105 | return $data; |
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| 277 | } |
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| 278 | |||
| 279 | /** |
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| 280 | * Updates metadata/option data |
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| 281 | * @since 1.0.1 |
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| 282 | * @param mixed $new_value Value to update data with |
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| 283 | * @param bool $single Whether data is an array (add_metadata) |
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| 284 | */ |
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| 285 | 11 | public function update_data( $new_value, $single = true ) { |
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| 349 | |||
| 350 | /** |
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| 351 | * Removes/updates metadata/option data |
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| 352 | * @since 1.0.1 |
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| 353 | * @param string $old Old value |
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| 354 | */ |
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| 355 | 3 | public function remove_data( $old = '' ) { |
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| 411 | |||
| 412 | /** |
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| 413 | * Data variables for get/set data methods |
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| 414 | * @since 1.1.0 |
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| 415 | * @param array $args Override arguments |
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| 416 | * @return array Updated arguments |
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| 417 | */ |
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| 418 | 105 | public function data_args( $args = array() ) { |
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| 428 | |||
| 429 | /** |
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| 430 | * Checks if field has a registered sanitization callback |
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| 431 | * @since 1.0.1 |
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| 432 | * @param mixed $meta_value Meta value |
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| 433 | * @return mixed Possibly sanitized meta value |
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| 434 | */ |
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| 435 | 13 | public function sanitization_cb( $meta_value ) { |
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| 478 | |||
| 479 | /** |
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| 480 | * Process $_POST data to save this field's value |
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| 481 | * @since 2.0.3 |
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| 482 | * @param array $data_to_save $_POST data to check |
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| 483 | * @return array|int|bool Result of save, false on failure |
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| 484 | */ |
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| 485 | 2 | public function save_field_from_data( array $data_to_save ) { |
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| 494 | |||
| 495 | /** |
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| 496 | * Sanitize/store a value to this field |
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| 497 | * @since 2.0.0 |
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| 498 | * @param array $meta_value Desired value to sanitize/store |
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| 499 | * @return array|int|bool Result of save. false on failure |
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| 500 | */ |
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| 501 | 12 | public function save_field( $meta_value ) { |
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| 571 | |||
| 572 | /** |
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| 573 | * Determine if current type is exempt from escaping |
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| 574 | * @since 1.1.0 |
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| 575 | * @return bool True if exempt |
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| 576 | */ |
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| 577 | 46 | public function escaping_exception() { |
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| 585 | |||
| 586 | /** |
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| 587 | * Determine if current type cannot be repeatable |
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| 588 | * @since 1.1.0 |
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| 589 | * @param string $type Field type to check |
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| 590 | * @return bool True if type cannot be repeatable |
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| 591 | */ |
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| 592 | 4 | public function repeatable_exception( $type ) { |
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| 622 | |||
| 623 | /** |
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| 624 | * Escape the value before output. Defaults to 'esc_attr()' |
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| 625 | * @since 1.0.1 |
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| 626 | * @param callable $func Escaping function (if not esc_attr()) |
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| 627 | * @param mixed $meta_value Meta value |
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| 628 | * @return mixed Final value |
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| 629 | */ |
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| 630 | 46 | public function escaped_value( $func = 'esc_attr', $meta_value = '' ) { |
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| 670 | |||
| 671 | /** |
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| 672 | * Return non-empty value or field default if value IS empty |
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| 673 | * @since 2.0.0 |
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| 674 | * @param mixed $meta_value Field value |
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| 675 | * @return mixed Field value, or default value |
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| 676 | */ |
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| 677 | 46 | public function val_or_default( $meta_value ) { |
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| 680 | |||
| 681 | /** |
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| 682 | * Offset a time value based on timezone |
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| 683 | * @since 1.0.0 |
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| 684 | * @return string Offset time string |
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| 685 | */ |
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| 686 | public function field_timezone_offset() { |
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| 689 | |||
| 690 | /** |
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| 691 | * Return timezone string |
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| 692 | * @since 1.0.0 |
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| 693 | * @return string Timezone string |
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| 694 | */ |
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| 695 | public function field_timezone() { |
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| 709 | |||
| 710 | /** |
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| 711 | * Format the timestamp field value based on the field date/time format arg |
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| 712 | * @since 2.0.0 |
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| 713 | * @param int $meta_value Timestamp |
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| 714 | * @param string $format Either date_format or time_format |
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| 715 | * @return string Formatted date |
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| 716 | */ |
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| 717 | 10 | public function format_timestamp( $meta_value, $format = 'date_format' ) { |
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| 720 | |||
| 721 | /** |
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| 722 | * Return a formatted timestamp for a field |
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| 723 | * @since 2.0.0 |
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| 724 | * @param string $format Either date_format or time_format |
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| 725 | * @param string $meta_value Optional meta value to check |
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| 726 | * @return string Formatted date |
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| 727 | */ |
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| 728 | 10 | public function get_timestamp_format( $format = 'date_format', $meta_value = 0 ) { |
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| 740 | |||
| 741 | /** |
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| 742 | * Get timestamp from text date |
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| 743 | * @since 2.2.0 |
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| 744 | * @param string $value Date value |
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| 745 | * @return mixed Unix timestamp representing the date. |
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| 746 | */ |
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| 747 | public function get_timestamp_from_value( $value ) { |
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| 750 | |||
| 751 | /** |
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| 752 | * Get field render callback and Render the field row |
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| 753 | * @since 1.0.0 |
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| 754 | */ |
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| 755 | 10 | public function render_field() { |
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| 763 | |||
| 764 | /** |
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| 765 | * Default field render callback |
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| 766 | * @since 2.1.1 |
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| 767 | */ |
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| 768 | 9 | public function render_field_callback() { |
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| 812 | |||
| 813 | /** |
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| 814 | * The default label_cb callback (if not a title field) |
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| 815 | * |
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| 816 | * @since 2.1.1 |
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| 817 | * @return string Label html markup |
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| 818 | */ |
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| 819 | 9 | public function label() { |
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| 828 | |||
| 829 | /** |
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| 830 | * Defines the classes for the current CMB2 field row |
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| 831 | * |
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| 832 | * @since 2.0.0 |
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| 833 | * @return string Space concatenated list of classes |
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| 834 | */ |
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| 835 | 45 | public function row_classes() { |
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| 836 | |||
| 837 | 45 | $classes = array(); |
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| 838 | |||
| 839 | /** |
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| 840 | * By default, 'text_url' and 'text' fields get table-like styling |
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| 841 | * |
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| 842 | * @since 2.0.0 |
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| 843 | * |
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| 844 | * @param array $field_types The types of fields which should get the 'table-layout' class |
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| 845 | */ |
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| 846 | 45 | $repeat_table_rows_types = apply_filters( 'cmb2_repeat_table_row_types', array( |
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| 847 | 45 | 'text_url', 'text', |
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| 848 | 45 | ) ); |
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| 849 | |||
| 850 | $conditional_classes = array( |
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| 851 | 45 | 'cmb-type-' . str_replace( '_', '-', sanitize_html_class( $this->type() ) ) => true, |
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| 852 | 45 | 'cmb2-id-' . str_replace( '_', '-', sanitize_html_class( $this->id() ) ) => true, |
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| 853 | 45 | 'cmb-repeat' => $this->args( 'repeatable' ), |
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| 854 | 45 | 'cmb-repeat-group-field' => $this->group, |
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| 855 | 45 | 'cmb-inline' => $this->args( 'inline' ), |
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| 856 | 45 | 'table-layout' => 'edit' === $this->render_context && in_array( $this->type(), $repeat_table_rows_types ), |
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| 857 | 45 | ); |
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| 858 | |||
| 859 | 45 | foreach ( $conditional_classes as $class => $condition ) { |
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| 860 | 45 | if ( $condition ) { |
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| 861 | 45 | $classes[] = $class; |
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| 862 | 45 | } |
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| 863 | 45 | } |
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| 864 | |||
| 865 | 45 | if ( $added_classes = $this->args( 'classes' ) ) { |
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| 866 | 1 | $added_classes = is_array( $added_classes ) ? implode( ' ', $added_classes ) : (string) $added_classes; |
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| 867 | 45 | } elseif ( $added_classes = $this->get_param_callback_result( 'classes_cb' ) ) { |
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| 868 | 2 | $added_classes = is_array( $added_classes ) ? implode( ' ', $added_classes ) : (string) $added_classes; |
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| 869 | 2 | } |
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| 870 | |||
| 871 | 45 | if ( $added_classes ) { |
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| 872 | 3 | $classes[] = esc_attr( $added_classes ); |
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| 873 | 3 | } |
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| 874 | |||
| 875 | /** |
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| 876 | * Globally filter row classes |
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| 877 | * |
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| 878 | * @since 2.0.0 |
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| 879 | * |
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| 880 | * @param string $classes Space-separated list of row classes |
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| 881 | * @param CMB2_Field object $field This field object |
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| 882 | */ |
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| 883 | 45 | return apply_filters( 'cmb2_row_classes', implode( ' ', $classes ), $this ); |
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| 884 | } |
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| 885 | |||
| 886 | |||
| 887 | |||
| 888 | /** |
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| 889 | * Get field display callback and render the display value in the column. |
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| 890 | * @since 2.2.2 |
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| 891 | */ |
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| 892 | 33 | public function render_column() { |
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| 900 | |||
| 901 | /** |
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| 902 | * Default callback to outputs field value in a display format. |
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| 903 | * @since 2.2.2 |
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| 904 | */ |
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| 905 | 33 | public function display_value_callback() { |
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| 948 | |||
| 949 | /** |
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| 950 | * Replaces a hash key - {#} - with the repeatable index |
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| 951 | * @since 1.2.0 |
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| 952 | * @param string $value Value to update |
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| 953 | * @return string Updated value |
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| 954 | */ |
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| 955 | 2 | public function replace_hash( $value ) { |
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| 959 | |||
| 960 | /** |
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| 961 | * Retrieve text parameter from field's text array (if it has one), or use fallback text |
||
| 962 | * For back-compatibility, falls back to checking the options array. |
||
| 963 | * |
||
| 964 | * @since 2.2.2 |
||
| 965 | * @param string $text_key Key in field's text array |
||
| 966 | * @param string $fallback Fallback text |
||
| 967 | * @return string Text |
||
| 968 | */ |
||
| 969 | 8 | public function get_string( $text_key, $fallback ) { |
|
| 993 | |||
| 994 | /** |
||
| 995 | * Retrieve options args. Calls options_cb if it exists. |
||
| 996 | * @since 2.0.0 |
||
| 997 | * @param string $key Specific option to retrieve |
||
| 998 | * @return array Array of options |
||
| 999 | */ |
||
| 1000 | 31 | public function options( $key = '' ) { |
|
| 1025 | |||
| 1026 | /** |
||
| 1027 | * Store JS dependencies as part of the field args. |
||
| 1028 | * @since 2.2.0 |
||
| 1029 | * @param array $dependencies Dependies to register for this field. |
||
| 1030 | */ |
||
| 1031 | 12 | public function add_js_dependencies( $dependencies = array() ) { |
|
| 1038 | |||
| 1039 | /** |
||
| 1040 | * Get CMB2_Field default value, either from default param or default_cb param. |
||
| 1041 | * |
||
| 1042 | * @since 0.2.2 |
||
| 1043 | * |
||
| 1044 | * @return mixed Default field value |
||
| 1045 | */ |
||
| 1046 | 33 | public function get_default() { |
|
| 1059 | |||
| 1060 | /** |
||
| 1061 | * Fills in empty field parameters with defaults |
||
| 1062 | * @since 1.1.0 |
||
| 1063 | * @param array $args Metabox field config array |
||
| 1064 | * @param array Modified field config array. |
||
| 1065 | */ |
||
| 1066 | 109 | public function _set_field_defaults( $args ) { |
|
| 1165 | |||
| 1166 | /** |
||
| 1167 | * Get default field arguments specific to this CMB2 object. |
||
| 1168 | * @since 2.2.0 |
||
| 1169 | * @param array $field_args Metabox field config array. |
||
| 1170 | * @param CMB2_Field $field_group (optional) CMB2_Field object (group parent) |
||
| 1171 | * @return array Array of field arguments. |
||
| 1172 | */ |
||
| 1173 | 5 | protected function get_default_args( $field_args, $field_group = null ) { |
|
| 1184 | |||
| 1185 | /** |
||
| 1186 | * Returns a cloned version of this field object with, but with |
||
| 1187 | * modified/overridden field arguments. |
||
| 1188 | * |
||
| 1189 | * @since 2.2.2 |
||
| 1190 | * @param array $field_args Array of field arguments, or entire array of |
||
| 1191 | * arguments for CMB2_Field |
||
| 1192 | * |
||
| 1193 | * @return CMB2_Field The new CMB2_Field instance. |
||
| 1194 | */ |
||
| 1195 | 5 | public function get_field_clone( $field_args ) { |
|
| 1198 | |||
| 1199 | /** |
||
| 1200 | * Returns the CMB2 instance this field is registered to. |
||
| 1201 | * |
||
| 1202 | * @since 2.2.2 |
||
| 1203 | * |
||
| 1204 | * @return CMB2|WP_Error If new CMB2_Field is called without cmb_id arg, returns error. |
||
| 1205 | */ |
||
| 1206 | 1 | public function get_cmb() { |
|
| 1213 | |||
| 1214 | /** |
||
| 1215 | * Converts deprecated field parameters to the current/proper parameter, and throws a deprecation notice. |
||
| 1216 | * @since 2.2.3 |
||
| 1217 | * @param array $args Metabox field config array. |
||
| 1218 | * @param array Modified field config array. |
||
| 1219 | */ |
||
| 1220 | 109 | protected function convert_deprecated_params( $args ) { |
|
| 1263 | |||
| 1264 | } |
||
| 1265 |
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.