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 GravityView_View 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 GravityView_View, and based on these observations, apply Extract Interface, too.
1 | <?php |
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23 | class GravityView_View extends Gamajo_Template_Loader { |
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24 | |||
25 | /** |
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26 | * Prefix for filter names. |
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27 | * @var string |
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28 | */ |
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29 | protected $filter_prefix = 'gravityview'; |
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30 | |||
31 | /** |
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32 | * Directory name where custom templates for this plugin should be found in the theme. |
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33 | * @var string |
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34 | */ |
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35 | protected $theme_template_directory = 'gravityview'; |
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36 | |||
37 | /** |
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38 | * Reference to the root directory path of this plugin. |
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39 | * @var string |
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40 | */ |
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41 | protected $plugin_directory = GRAVITYVIEW_DIR; |
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42 | |||
43 | /** |
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44 | * Store templates locations that have already been located |
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45 | * @var array |
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46 | */ |
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47 | protected $located_templates = array(); |
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48 | |||
49 | /** |
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50 | * The name of the template, like "list", "table", or "datatables" |
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51 | * @var string |
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52 | */ |
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53 | protected $template_part_slug = ''; |
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54 | |||
55 | /** |
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56 | * The name of the file part, like "body" or "single" |
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57 | * @var string |
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58 | */ |
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59 | protected $template_part_name = ''; |
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60 | |||
61 | /** |
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62 | * @var int Gravity Forms form ID |
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63 | */ |
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64 | protected $form_id = NULL; |
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65 | |||
66 | /** |
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67 | * @var int View ID |
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68 | * @todo: this needs to be public until extensions support 1.7+ |
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69 | */ |
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70 | public $view_id = NULL; |
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71 | |||
72 | /** |
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73 | * @var array Fields for the form |
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74 | */ |
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75 | protected $fields = array(); |
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76 | |||
77 | /** |
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78 | * @var string Current screen. Defaults to "directory" or "single" |
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79 | */ |
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80 | protected $context = 'directory'; |
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81 | |||
82 | /** |
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83 | * @var int|null If in embedded post or page, the ID of it |
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84 | */ |
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85 | protected $post_id = NULL; |
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86 | |||
87 | /** |
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88 | * @var array Gravity Forms form array at ID $form_id |
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89 | */ |
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90 | protected $form = NULL; |
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91 | |||
92 | /** |
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93 | * @var array Configuration for the View |
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94 | */ |
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95 | protected $atts = array(); |
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96 | |||
97 | /** |
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98 | * @var array Entries for the current result. Single item in array for single entry View |
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99 | */ |
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100 | protected $entries = array(); |
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101 | |||
102 | /** |
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103 | * @var int Total entries count for the current result. |
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104 | */ |
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105 | protected $total_entries = 0; |
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106 | |||
107 | /** |
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108 | * @var string The label to display back links |
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109 | */ |
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110 | protected $back_link_label = ''; |
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111 | |||
112 | /** |
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113 | * @var array Array with `offset` and `page_size` keys |
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114 | */ |
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115 | protected $paging = array(); |
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116 | |||
117 | /** |
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118 | * @var array Array with `sort_field` and `sort_direction` keys |
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119 | */ |
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120 | protected $sorting = array(); |
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121 | |||
122 | /** |
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123 | * @var bool Whether to hide the results until a search is performed |
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124 | * @since 1.5.4 |
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125 | */ |
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126 | protected $hide_until_searched = false; |
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127 | |||
128 | /** |
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129 | * Current entry in the loop |
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130 | * @var array |
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131 | */ |
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132 | protected $_current_entry = array(); |
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133 | |||
134 | /** |
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135 | * @var array |
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136 | */ |
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137 | protected $_current_field = array(); |
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138 | |||
139 | /** |
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140 | * @var GravityView_View |
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141 | */ |
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142 | static $instance = NULL; |
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143 | |||
144 | /** |
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145 | * Construct the view object |
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146 | * @param array $atts Associative array to set the data of |
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147 | */ |
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148 | function __construct( $atts = array() ) { |
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149 | |||
150 | $atts = wp_parse_args( $atts, array( |
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151 | 'form_id' => NULL, |
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152 | 'view_id' => NULL, |
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153 | 'fields' => NULL, |
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154 | 'context' => NULL, |
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155 | 'post_id' => NULL, |
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156 | 'form' => NULL, |
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157 | 'atts' => NULL, |
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158 | ) ); |
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159 | |||
160 | foreach ($atts as $key => $value) { |
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161 | if( is_null( $value ) ) { |
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162 | continue; |
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163 | } |
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164 | $this->{$key} = $value; |
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165 | } |
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166 | |||
167 | |||
168 | // Add granular overrides |
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169 | add_filter( $this->filter_prefix . '_get_template_part', array( $this, 'add_id_specific_templates' ), 10, 3 ); |
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170 | |||
171 | |||
172 | // widget logic |
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173 | add_action( 'gravityview_before', array( $this, 'render_widget_hooks' ) ); |
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174 | add_action( 'gravityview_after', array( $this, 'render_widget_hooks' ) ); |
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175 | |||
176 | /** |
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177 | * Clear the current entry after the loop is done |
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178 | * @since 1.7.3 |
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179 | */ |
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180 | add_action( 'gravityview_footer', array( $this, 'clearCurrentEntry' ), 500 ); |
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181 | |||
182 | self::$instance = &$this; |
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183 | } |
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184 | |||
185 | /** |
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186 | * @param null $passed_post |
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187 | * |
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188 | * @return GravityView_View |
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189 | */ |
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190 | static function getInstance( $passed_post = NULL ) { |
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191 | |||
192 | if( empty( self::$instance ) ) { |
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193 | self::$instance = new self( $passed_post ); |
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194 | } |
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195 | |||
196 | return self::$instance; |
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197 | } |
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198 | |||
199 | /** |
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200 | * @param string|null $key The key to a specific attribute of the current field |
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201 | * @return array|mixed|null If $key is set and attribute exists at $key, return that. If not set, return NULL. Otherwise, return current field array |
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202 | */ |
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203 | public function getCurrentField( $key = NULL ) { |
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204 | |||
205 | if( !empty( $key ) ) { |
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206 | if( isset( $this->_current_field[ $key ] ) ) { |
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207 | return $this->_current_field[ $key ]; |
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208 | } |
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209 | return NULL; |
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210 | } |
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211 | |||
212 | return $this->_current_field; |
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213 | } |
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214 | |||
215 | public function setCurrentFieldSetting( $key, $value ) { |
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216 | |||
217 | if( !empty( $this->_current_field ) ) { |
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218 | $this->_current_field['field_settings'][ $key ] = $value; |
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219 | } |
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220 | |||
221 | } |
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222 | |||
223 | public function getCurrentFieldSetting( $key ) { |
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224 | $settings = $this->getCurrentField('field_settings'); |
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225 | |||
226 | if( $settings && !empty( $settings[ $key ] ) ) { |
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227 | return $settings[ $key ]; |
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228 | } |
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229 | |||
230 | return NULL; |
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231 | } |
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232 | |||
233 | /** |
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234 | * @param array $passed_field |
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235 | */ |
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236 | public function setCurrentField( $passed_field ) { |
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237 | |||
238 | $existing_field = $this->getCurrentField(); |
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239 | |||
240 | $set_field = wp_parse_args( $passed_field, $existing_field ); |
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241 | |||
242 | $this->_current_field = $set_field; |
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243 | |||
244 | /** |
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245 | * Backward compatibility |
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246 | * @deprecated 1.6.2 |
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247 | */ |
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248 | $this->field_data = $set_field; |
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249 | } |
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250 | |||
251 | /** |
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252 | * @param string|null $key The key to a specific field in the fields array |
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253 | * @return array|mixed|null If $key is set and field exists at $key, return that. If not set, return NULL. Otherwise, return array of fields. |
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254 | */ |
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255 | View Code Duplication | public function getAtts( $key = NULL ) { |
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256 | |||
257 | if( !empty( $key ) ) { |
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258 | if( isset( $this->atts[ $key ] ) ) { |
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259 | return $this->atts[ $key ]; |
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260 | } |
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261 | return NULL; |
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262 | } |
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263 | |||
264 | return $this->atts; |
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265 | } |
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266 | |||
267 | /** |
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268 | * @param array $atts |
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269 | */ |
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270 | public function setAtts( $atts ) { |
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273 | |||
274 | /** |
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275 | * @return array |
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276 | */ |
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277 | public function getForm() { |
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280 | |||
281 | /** |
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282 | * @param array $form |
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283 | */ |
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284 | public function setForm( $form ) { |
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287 | |||
288 | /** |
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289 | * @return int|null |
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290 | */ |
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291 | public function getPostId() { |
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294 | |||
295 | /** |
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296 | * @param int|null $post_id |
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297 | */ |
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298 | public function setPostId( $post_id ) { |
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301 | |||
302 | /** |
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303 | * @return string |
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304 | */ |
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305 | public function getContext() { |
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308 | |||
309 | /** |
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310 | * @param string $context |
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311 | */ |
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312 | public function setContext( $context ) { |
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315 | |||
316 | /** |
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317 | * @param string|null $key The key to a specific field in the fields array |
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318 | * @return array|mixed|null If $key is set and field exists at $key, return that. If not set, return NULL. Otherwise, return array of fields. |
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319 | */ |
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320 | public function getFields( $key = null ) { |
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321 | |||
322 | $fields = empty( $this->fields ) ? NULL : $this->fields; |
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323 | |||
324 | if( $fields && !empty( $key ) ) { |
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325 | $fields = isset( $fields[ $key ] ) ? $fields[ $key ] : NULL; |
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326 | } |
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327 | |||
328 | return $fields; |
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329 | } |
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330 | |||
331 | /** |
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332 | * @param array $fields |
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333 | */ |
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334 | public function setFields( $fields ) { |
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337 | |||
338 | /** |
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339 | * @param string $key The key to a specific field in the fields array |
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340 | * @return array|mixed|null If $key is set and field exists at $key, return that. If not set, return NULL. Otherwise, return array of fields. |
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341 | */ |
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342 | View Code Duplication | public function getField( $key ) { |
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343 | |||
344 | if( !empty( $key ) ) { |
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345 | if( isset( $this->fields[ $key ] ) ) { |
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346 | return $this->fields[ $key ]; |
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347 | } |
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348 | } |
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349 | |||
350 | return NULL; |
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351 | } |
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352 | |||
353 | /** |
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354 | * @param string $key The key to a specific field in the fields array |
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355 | * @param mixed $value The value to set for the field |
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356 | */ |
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357 | public function setField( $key, $value ) { |
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360 | |||
361 | /** |
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362 | * @return int |
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363 | */ |
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364 | public function getViewId() { |
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367 | |||
368 | /** |
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369 | * @param int $view_id |
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370 | */ |
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371 | public function setViewId( $view_id ) { |
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374 | |||
375 | /** |
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376 | * @return int |
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377 | */ |
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378 | public function getFormId() { |
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381 | |||
382 | /** |
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383 | * @param int $form_id |
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384 | */ |
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385 | public function setFormId( $form_id ) { |
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388 | |||
389 | /** |
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390 | * @return array |
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391 | */ |
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392 | public function getEntries() { |
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395 | |||
396 | /** |
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397 | * @param array $entries |
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398 | */ |
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399 | public function setEntries( $entries ) { |
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402 | |||
403 | /** |
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404 | * @return int |
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405 | */ |
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406 | public function getTotalEntries() { |
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409 | |||
410 | /** |
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411 | * @param int $total_entries |
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412 | */ |
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413 | public function setTotalEntries( $total_entries ) { |
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416 | |||
417 | /** |
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418 | * @return array |
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419 | */ |
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420 | public function getPaging() { |
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423 | |||
424 | /** |
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425 | * @param array $paging |
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426 | */ |
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427 | public function setPaging( $paging ) { |
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430 | |||
431 | /** |
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432 | * Get an array with pagination information |
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433 | * |
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434 | * @since 1.13 |
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435 | * |
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436 | * @return array { |
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437 | * @type int $first The starting entry number (counter, not ID) |
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438 | * @type int $last The last displayed entry number (counter, not ID) |
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439 | * @type int $total The total number of entries |
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440 | * } |
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441 | */ |
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442 | public function getPaginationCounts() { |
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443 | |||
444 | $paging = $this->getPaging(); |
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445 | $offset = $paging['offset']; |
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446 | $page_size = $paging['page_size']; |
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447 | $total = $this->getTotalEntries(); |
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448 | |||
449 | if ( empty( $total ) ) { |
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450 | do_action( 'gravityview_log_debug', __METHOD__ . ': No entries. Returning empty array.' ); |
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451 | |||
452 | return array(); |
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453 | } |
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454 | |||
455 | $first = empty( $offset ) ? 1 : $offset + 1; |
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456 | |||
457 | // If the page size + starting entry is larger than total, the total is the max. |
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458 | $last = ( $offset + $page_size > $total ) ? $total : $offset + $page_size; |
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459 | |||
460 | /** |
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461 | * @filter `gravityview_pagination_counts` Modify the displayed pagination numbers |
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462 | * @since 1.13 |
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463 | * @param array $counts Array with $first, $last, $total numbers in that order |
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464 | */ |
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465 | list( $first, $last, $total ) = apply_filters( 'gravityview_pagination_counts', array( $first, $last, $total ) ); |
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466 | |||
467 | return array( 'first' => (int) $first, 'last' => (int) $last, 'total' => (int) $total ); |
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468 | } |
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469 | |||
470 | /** |
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471 | * @return array |
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472 | */ |
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473 | public function getSorting() { |
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476 | |||
477 | /** |
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478 | * @param array $sorting |
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479 | */ |
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480 | public function setSorting( $sorting ) { |
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483 | |||
484 | /** |
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485 | * @return string |
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486 | */ |
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487 | public function getBackLinkLabel() { |
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488 | |||
489 | $back_link_label = GravityView_API::replace_variables( $this->back_link_label, $this->getForm(), $this->getCurrentEntry() ); |
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490 | |||
491 | $back_link_label = do_shortcode( $back_link_label ); |
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492 | |||
493 | return $back_link_label; |
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494 | } |
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495 | |||
496 | /** |
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497 | * @param string $back_link_label |
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498 | */ |
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499 | public function setBackLinkLabel( $back_link_label ) { |
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502 | |||
503 | /** |
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504 | * @return boolean |
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505 | */ |
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506 | public function isHideUntilSearched() { |
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509 | |||
510 | /** |
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511 | * @param boolean $hide_until_searched |
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512 | */ |
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513 | public function setHideUntilSearched( $hide_until_searched ) { |
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516 | |||
517 | /** |
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518 | * @return string |
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519 | */ |
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520 | public function getTemplatePartSlug() { |
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523 | |||
524 | /** |
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525 | * @param string $template_part_slug |
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526 | */ |
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527 | public function setTemplatePartSlug( $template_part_slug ) { |
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530 | |||
531 | /** |
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532 | * @return string |
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533 | */ |
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534 | public function getTemplatePartName() { |
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537 | |||
538 | /** |
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539 | * @param string $template_part_name |
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540 | */ |
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541 | public function setTemplatePartName( $template_part_name ) { |
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544 | |||
545 | /** |
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546 | * Return the current entry. If in the loop, the current entry. If single entry, the currently viewed entry. |
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547 | * @return array |
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548 | */ |
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549 | public function getCurrentEntry() { |
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565 | |||
566 | /** |
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567 | * @param array $current_entry |
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568 | * @return void |
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569 | */ |
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570 | public function setCurrentEntry( $current_entry ) { |
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573 | |||
574 | /** |
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575 | * Clear the current entry after all entries in the loop have been displayed. |
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576 | * |
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577 | * @since 1.7.3 |
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578 | * @return void |
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579 | */ |
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580 | public function clearCurrentEntry() { |
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583 | |||
584 | /** |
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585 | * Render an output zone, as configured in the Admin |
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586 | * |
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587 | * @param string $zone The zone name, like 'footer-left' |
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588 | * @param array $atts |
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589 | * |
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590 | * @return string|null |
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591 | */ |
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592 | public function renderZone( $zone = '', $atts = array() ) { |
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593 | |||
594 | if( empty( $zone ) ) { |
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659 | |||
660 | /** |
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661 | * In order to improve lookup times, we store located templates in a local array. |
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662 | * |
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663 | * This improves performance by up to 1/2 second on a 250 entry View with 7 columns showing |
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664 | * |
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665 | * @inheritdoc |
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666 | * @see Gamajo_Template_Loader::locate_template() |
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667 | * @return null|string NULL: Template not found; String: path to template |
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668 | */ |
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669 | function locate_template( $template_names, $load = false, $require_once = true ) { |
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691 | |||
692 | /** |
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693 | * Magic Method: Instead of throwing an error when a variable isn't set, return null. |
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694 | * @param string $name Key for the data retrieval. |
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695 | * @return mixed|null The stored data. |
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696 | */ |
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697 | public function __get( $name ) { |
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704 | |||
705 | /** |
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706 | * Enable overrides of GravityView templates on a granular basis |
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707 | * |
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708 | * The loading order is: |
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709 | * |
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710 | * - view-[View ID]-table-footer.php |
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711 | * - form-[Form ID]-table-footer.php |
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712 | * - page-[ID of post or page where view is embedded]-table-footer.php |
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713 | * - table-footer.php |
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714 | * |
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715 | * @see Gamajo_Template_Loader::get_template_file_names() Where the filter is |
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716 | * @param array $templates Existing list of templates. |
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717 | * @param string $slug Name of the template base, example: `table`, `list`, `datatables`, `map` |
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718 | * @param string $name Name of the template part, example: `body`, `footer`, `head`, `single` |
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719 | * |
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720 | * @return array $templates Modified template array, merged with existing $templates values |
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721 | */ |
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722 | function add_id_specific_templates( $templates, $slug, $name ) { |
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745 | |||
746 | // Load the template |
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747 | public function render( $slug, $name, $require_once = true ) { |
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767 | |||
768 | /** |
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769 | * |
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770 | * @param $view_id |
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771 | */ |
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772 | public function render_widget_hooks( $view_id ) { |
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859 | |||
860 | } |
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861 | |||
862 |
Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.