revision.php (16140B)
1 <?php 2 /** 3 * WordPress Administration Revisions API 4 * 5 * @package WordPress 6 * @subpackage Administration 7 * @since 3.6.0 8 */ 9 10 /** 11 * Get the revision UI diff. 12 * 13 * @since 3.6.0 14 * 15 * @param WP_Post|int $post The post object or post ID. 16 * @param int $compare_from The revision ID to compare from. 17 * @param int $compare_to The revision ID to come to. 18 * @return array|false Associative array of a post's revisioned fields and their diffs. 19 * Or, false on failure. 20 */ 21 function wp_get_revision_ui_diff( $post, $compare_from, $compare_to ) { 22 $post = get_post( $post ); 23 if ( ! $post ) { 24 return false; 25 } 26 27 if ( $compare_from ) { 28 $compare_from = get_post( $compare_from ); 29 if ( ! $compare_from ) { 30 return false; 31 } 32 } else { 33 // If we're dealing with the first revision... 34 $compare_from = false; 35 } 36 37 $compare_to = get_post( $compare_to ); 38 if ( ! $compare_to ) { 39 return false; 40 } 41 42 // If comparing revisions, make sure we're dealing with the right post parent. 43 // The parent post may be a 'revision' when revisions are disabled and we're looking at autosaves. 44 if ( $compare_from && $compare_from->post_parent !== $post->ID && $compare_from->ID !== $post->ID ) { 45 return false; 46 } 47 if ( $compare_to->post_parent !== $post->ID && $compare_to->ID !== $post->ID ) { 48 return false; 49 } 50 51 if ( $compare_from && strtotime( $compare_from->post_date_gmt ) > strtotime( $compare_to->post_date_gmt ) ) { 52 $temp = $compare_from; 53 $compare_from = $compare_to; 54 $compare_to = $temp; 55 } 56 57 // Add default title if title field is empty. 58 if ( $compare_from && empty( $compare_from->post_title ) ) { 59 $compare_from->post_title = __( '(no title)' ); 60 } 61 if ( empty( $compare_to->post_title ) ) { 62 $compare_to->post_title = __( '(no title)' ); 63 } 64 65 $return = array(); 66 67 foreach ( _wp_post_revision_fields( $post ) as $field => $name ) { 68 /** 69 * Contextually filter a post revision field. 70 * 71 * The dynamic portion of the hook name, `$field`, corresponds to a name of a 72 * field of the revision object. 73 * 74 * Possible hook names include: 75 * 76 * - `_wp_post_revision_field_post_title` 77 * - `_wp_post_revision_field_post_content` 78 * - `_wp_post_revision_field_post_excerpt` 79 * 80 * @since 3.6.0 81 * 82 * @param string $revision_field The current revision field to compare to or from. 83 * @param string $field The current revision field. 84 * @param WP_Post $compare_from The revision post object to compare to or from. 85 * @param string $context The context of whether the current revision is the old 86 * or the new one. Values are 'to' or 'from'. 87 */ 88 $content_from = $compare_from ? apply_filters( "_wp_post_revision_field_{$field}", $compare_from->$field, $field, $compare_from, 'from' ) : ''; 89 90 /** This filter is documented in wp-admin/includes/revision.php */ 91 $content_to = apply_filters( "_wp_post_revision_field_{$field}", $compare_to->$field, $field, $compare_to, 'to' ); 92 93 $args = array( 94 'show_split_view' => true, 95 'title_left' => __( 'Removed' ), 96 'title_right' => __( 'Added' ), 97 ); 98 99 /** 100 * Filters revisions text diff options. 101 * 102 * Filters the options passed to wp_text_diff() when viewing a post revision. 103 * 104 * @since 4.1.0 105 * 106 * @param array $args { 107 * Associative array of options to pass to wp_text_diff(). 108 * 109 * @type bool $show_split_view True for split view (two columns), false for 110 * un-split view (single column). Default true. 111 * } 112 * @param string $field The current revision field. 113 * @param WP_Post $compare_from The revision post to compare from. 114 * @param WP_Post $compare_to The revision post to compare to. 115 */ 116 $args = apply_filters( 'revision_text_diff_options', $args, $field, $compare_from, $compare_to ); 117 118 $diff = wp_text_diff( $content_from, $content_to, $args ); 119 120 if ( ! $diff && 'post_title' === $field ) { 121 // It's a better user experience to still show the Title, even if it didn't change. 122 // No, you didn't see this. 123 $diff = '<table class="diff"><colgroup><col class="content diffsplit left"><col class="content diffsplit middle"><col class="content diffsplit right"></colgroup><tbody><tr>'; 124 125 // In split screen mode, show the title before/after side by side. 126 if ( true === $args['show_split_view'] ) { 127 $diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td><td></td><td>' . esc_html( $compare_to->post_title ) . '</td>'; 128 } else { 129 $diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td>'; 130 131 // In single column mode, only show the title once if unchanged. 132 if ( $compare_from->post_title !== $compare_to->post_title ) { 133 $diff .= '</tr><tr><td>' . esc_html( $compare_to->post_title ) . '</td>'; 134 } 135 } 136 137 $diff .= '</tr></tbody>'; 138 $diff .= '</table>'; 139 } 140 141 if ( $diff ) { 142 $return[] = array( 143 'id' => $field, 144 'name' => $name, 145 'diff' => $diff, 146 ); 147 } 148 } 149 150 /** 151 * Filters the fields displayed in the post revision diff UI. 152 * 153 * @since 4.1.0 154 * 155 * @param array[] $return Array of revision UI fields. Each item is an array of id, name, and diff. 156 * @param WP_Post $compare_from The revision post to compare from. 157 * @param WP_Post $compare_to The revision post to compare to. 158 */ 159 return apply_filters( 'wp_get_revision_ui_diff', $return, $compare_from, $compare_to ); 160 161 } 162 163 /** 164 * Prepare revisions for JavaScript. 165 * 166 * @since 3.6.0 167 * 168 * @param WP_Post|int $post The post object or post ID. 169 * @param int $selected_revision_id The selected revision ID. 170 * @param int $from Optional. The revision ID to compare from. 171 * @return array An associative array of revision data and related settings. 172 */ 173 function wp_prepare_revisions_for_js( $post, $selected_revision_id, $from = null ) { 174 $post = get_post( $post ); 175 $authors = array(); 176 $now_gmt = time(); 177 178 $revisions = wp_get_post_revisions( 179 $post->ID, 180 array( 181 'order' => 'ASC', 182 'check_enabled' => false, 183 ) 184 ); 185 // If revisions are disabled, we only want autosaves and the current post. 186 if ( ! wp_revisions_enabled( $post ) ) { 187 foreach ( $revisions as $revision_id => $revision ) { 188 if ( ! wp_is_post_autosave( $revision ) ) { 189 unset( $revisions[ $revision_id ] ); 190 } 191 } 192 $revisions = array( $post->ID => $post ) + $revisions; 193 } 194 195 $show_avatars = get_option( 'show_avatars' ); 196 197 cache_users( wp_list_pluck( $revisions, 'post_author' ) ); 198 199 $can_restore = current_user_can( 'edit_post', $post->ID ); 200 $current_id = false; 201 202 foreach ( $revisions as $revision ) { 203 $modified = strtotime( $revision->post_modified ); 204 $modified_gmt = strtotime( $revision->post_modified_gmt . ' +0000' ); 205 if ( $can_restore ) { 206 $restore_link = str_replace( 207 '&', 208 '&', 209 wp_nonce_url( 210 add_query_arg( 211 array( 212 'revision' => $revision->ID, 213 'action' => 'restore', 214 ), 215 admin_url( 'revision.php' ) 216 ), 217 "restore-post_{$revision->ID}" 218 ) 219 ); 220 } 221 222 if ( ! isset( $authors[ $revision->post_author ] ) ) { 223 $authors[ $revision->post_author ] = array( 224 'id' => (int) $revision->post_author, 225 'avatar' => $show_avatars ? get_avatar( $revision->post_author, 32 ) : '', 226 'name' => get_the_author_meta( 'display_name', $revision->post_author ), 227 ); 228 } 229 230 $autosave = (bool) wp_is_post_autosave( $revision ); 231 $current = ! $autosave && $revision->post_modified_gmt === $post->post_modified_gmt; 232 if ( $current && ! empty( $current_id ) ) { 233 // If multiple revisions have the same post_modified_gmt, highest ID is current. 234 if ( $current_id < $revision->ID ) { 235 $revisions[ $current_id ]['current'] = false; 236 $current_id = $revision->ID; 237 } else { 238 $current = false; 239 } 240 } elseif ( $current ) { 241 $current_id = $revision->ID; 242 } 243 244 $revisions_data = array( 245 'id' => $revision->ID, 246 'title' => get_the_title( $post->ID ), 247 'author' => $authors[ $revision->post_author ], 248 'date' => date_i18n( __( 'M j, Y @ H:i' ), $modified ), 249 'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), $modified ), 250 /* translators: %s: Human-readable time difference. */ 251 'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( $modified_gmt, $now_gmt ) ), 252 'autosave' => $autosave, 253 'current' => $current, 254 'restoreUrl' => $can_restore ? $restore_link : false, 255 ); 256 257 /** 258 * Filters the array of revisions used on the revisions screen. 259 * 260 * @since 4.4.0 261 * 262 * @param array $revisions_data { 263 * The bootstrapped data for the revisions screen. 264 * 265 * @type int $id Revision ID. 266 * @type string $title Title for the revision's parent WP_Post object. 267 * @type int $author Revision post author ID. 268 * @type string $date Date the revision was modified. 269 * @type string $dateShort Short-form version of the date the revision was modified. 270 * @type string $timeAgo GMT-aware amount of time ago the revision was modified. 271 * @type bool $autosave Whether the revision is an autosave. 272 * @type bool $current Whether the revision is both not an autosave and the post 273 * modified date matches the revision modified date (GMT-aware). 274 * @type bool|false $restoreUrl URL if the revision can be restored, false otherwise. 275 * } 276 * @param WP_Post $revision The revision's WP_Post object. 277 * @param WP_Post $post The revision's parent WP_Post object. 278 */ 279 $revisions[ $revision->ID ] = apply_filters( 'wp_prepare_revision_for_js', $revisions_data, $revision, $post ); 280 } 281 282 /** 283 * If we only have one revision, the initial revision is missing; This happens 284 * when we have an autsosave and the user has clicked 'View the Autosave' 285 */ 286 if ( 1 === count( $revisions ) ) { 287 $revisions[ $post->ID ] = array( 288 'id' => $post->ID, 289 'title' => get_the_title( $post->ID ), 290 'author' => $authors[ $revision->post_author ], 291 'date' => date_i18n( __( 'M j, Y @ H:i' ), strtotime( $post->post_modified ) ), 292 'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), strtotime( $post->post_modified ) ), 293 /* translators: %s: Human-readable time difference. */ 294 'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( strtotime( $post->post_modified_gmt ), $now_gmt ) ), 295 'autosave' => false, 296 'current' => true, 297 'restoreUrl' => false, 298 ); 299 $current_id = $post->ID; 300 } 301 302 /* 303 * If a post has been saved since the last revision (no revisioned fields 304 * were changed), we may not have a "current" revision. Mark the latest 305 * revision as "current". 306 */ 307 if ( empty( $current_id ) ) { 308 if ( $revisions[ $revision->ID ]['autosave'] ) { 309 $revision = end( $revisions ); 310 while ( $revision['autosave'] ) { 311 $revision = prev( $revisions ); 312 } 313 $current_id = $revision['id']; 314 } else { 315 $current_id = $revision->ID; 316 } 317 $revisions[ $current_id ]['current'] = true; 318 } 319 320 // Now, grab the initial diff. 321 $compare_two_mode = is_numeric( $from ); 322 if ( ! $compare_two_mode ) { 323 $found = array_search( $selected_revision_id, array_keys( $revisions ), true ); 324 if ( $found ) { 325 $from = array_keys( array_slice( $revisions, $found - 1, 1, true ) ); 326 $from = reset( $from ); 327 } else { 328 $from = 0; 329 } 330 } 331 332 $from = absint( $from ); 333 334 $diffs = array( 335 array( 336 'id' => $from . ':' . $selected_revision_id, 337 'fields' => wp_get_revision_ui_diff( $post->ID, $from, $selected_revision_id ), 338 ), 339 ); 340 341 return array( 342 'postId' => $post->ID, 343 'nonce' => wp_create_nonce( 'revisions-ajax-nonce' ), 344 'revisionData' => array_values( $revisions ), 345 'to' => $selected_revision_id, 346 'from' => $from, 347 'diffData' => $diffs, 348 'baseUrl' => parse_url( admin_url( 'revision.php' ), PHP_URL_PATH ), 349 'compareTwoMode' => absint( $compare_two_mode ), // Apparently booleans are not allowed. 350 'revisionIds' => array_keys( $revisions ), 351 ); 352 } 353 354 /** 355 * Print JavaScript templates required for the revisions experience. 356 * 357 * @since 4.1.0 358 * 359 * @global WP_Post $post Global post object. 360 */ 361 function wp_print_revision_templates() { 362 global $post; 363 ?><script id="tmpl-revisions-frame" type="text/html"> 364 <div class="revisions-control-frame"></div> 365 <div class="revisions-diff-frame"></div> 366 </script> 367 368 <script id="tmpl-revisions-buttons" type="text/html"> 369 <div class="revisions-previous"> 370 <input class="button" type="button" value="<?php echo esc_attr_x( 'Previous', 'Button label for a previous revision' ); ?>" /> 371 </div> 372 373 <div class="revisions-next"> 374 <input class="button" type="button" value="<?php echo esc_attr_x( 'Next', 'Button label for a next revision' ); ?>" /> 375 </div> 376 </script> 377 378 <script id="tmpl-revisions-checkbox" type="text/html"> 379 <div class="revision-toggle-compare-mode"> 380 <label> 381 <input type="checkbox" class="compare-two-revisions" 382 <# 383 if ( 'undefined' !== typeof data && data.model.attributes.compareTwoMode ) { 384 #> checked="checked"<# 385 } 386 #> 387 /> 388 <?php esc_html_e( 'Compare any two revisions' ); ?> 389 </label> 390 </div> 391 </script> 392 393 <script id="tmpl-revisions-meta" type="text/html"> 394 <# if ( ! _.isUndefined( data.attributes ) ) { #> 395 <div class="diff-title"> 396 <# if ( 'from' === data.type ) { #> 397 <strong><?php _ex( 'From:', 'Followed by post revision info' ); ?></strong> 398 <# } else if ( 'to' === data.type ) { #> 399 <strong><?php _ex( 'To:', 'Followed by post revision info' ); ?></strong> 400 <# } #> 401 <div class="author-card<# if ( data.attributes.autosave ) { #> autosave<# } #>"> 402 {{{ data.attributes.author.avatar }}} 403 <div class="author-info"> 404 <# if ( data.attributes.autosave ) { #> 405 <span class="byline"> 406 <?php 407 printf( 408 /* translators: %s: User's display name. */ 409 __( 'Autosave by %s' ), 410 '<span class="author-name">{{ data.attributes.author.name }}</span>' 411 ); 412 ?> 413 </span> 414 <# } else if ( data.attributes.current ) { #> 415 <span class="byline"> 416 <?php 417 printf( 418 /* translators: %s: User's display name. */ 419 __( 'Current Revision by %s' ), 420 '<span class="author-name">{{ data.attributes.author.name }}</span>' 421 ); 422 ?> 423 </span> 424 <# } else { #> 425 <span class="byline"> 426 <?php 427 printf( 428 /* translators: %s: User's display name. */ 429 __( 'Revision by %s' ), 430 '<span class="author-name">{{ data.attributes.author.name }}</span>' 431 ); 432 ?> 433 </span> 434 <# } #> 435 <span class="time-ago">{{ data.attributes.timeAgo }}</span> 436 <span class="date">({{ data.attributes.dateShort }})</span> 437 </div> 438 <# if ( 'to' === data.type && data.attributes.restoreUrl ) { #> 439 <input <?php if ( wp_check_post_lock( $post->ID ) ) { ?> 440 disabled="disabled" 441 <?php } else { ?> 442 <# if ( data.attributes.current ) { #> 443 disabled="disabled" 444 <# } #> 445 <?php } ?> 446 <# if ( data.attributes.autosave ) { #> 447 type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Autosave' ); ?>" /> 448 <# } else { #> 449 type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Revision' ); ?>" /> 450 <# } #> 451 <# } #> 452 </div> 453 <# if ( 'tooltip' === data.type ) { #> 454 <div class="revisions-tooltip-arrow"><span></span></div> 455 <# } #> 456 <# } #> 457 </script> 458 459 <script id="tmpl-revisions-diff" type="text/html"> 460 <div class="loading-indicator"><span class="spinner"></span></div> 461 <div class="diff-error"><?php _e( 'Sorry, something went wrong. The requested comparison could not be loaded.' ); ?></div> 462 <div class="diff"> 463 <# _.each( data.fields, function( field ) { #> 464 <h3>{{ field.name }}</h3> 465 {{{ field.diff }}} 466 <# }); #> 467 </div> 468 </script> 469 <?php 470 }