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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 /* 43 * If comparing revisions, make sure we are dealing with the right post parent. 44 * The parent post may be a 'revision' when revisions are disabled and we're looking at autosaves. 45 */ 46 if ( $compare_from && $compare_from->post_parent !== $post->ID && $compare_from->ID !== $post->ID ) { 47 return false; 48 } 49 if ( $compare_to->post_parent !== $post->ID && $compare_to->ID !== $post->ID ) { 50 return false; 51 } 52 53 if ( $compare_from && strtotime( $compare_from->post_date_gmt ) > strtotime( $compare_to->post_date_gmt ) ) { 54 $temp = $compare_from; 55 $compare_from = $compare_to; 56 $compare_to = $temp; 57 } 58 59 // Add default title if title field is empty. 60 if ( $compare_from && empty( $compare_from->post_title ) ) { 61 $compare_from->post_title = __( '(no title)' ); 62 } 63 if ( empty( $compare_to->post_title ) ) { 64 $compare_to->post_title = __( '(no title)' ); 65 } 66 67 $return = array(); 68 69 foreach ( _wp_post_revision_fields( $post ) as $field => $name ) { 70 /** 71 * Contextually filter a post revision field. 72 * 73 * The dynamic portion of the hook name, `$field`, corresponds to a name of a 74 * field of the revision object. 75 * 76 * Possible hook names include: 77 * 78 * - `_wp_post_revision_field_post_title` 79 * - `_wp_post_revision_field_post_content` 80 * - `_wp_post_revision_field_post_excerpt` 81 * 82 * @since 3.6.0 83 * 84 * @param string $revision_field The current revision field to compare to or from. 85 * @param string $field The current revision field. 86 * @param WP_Post $compare_from The revision post object to compare to or from. 87 * @param string $context The context of whether the current revision is the old 88 * or the new one. Either 'to' or 'from'. 89 */ 90 $content_from = $compare_from ? apply_filters( "_wp_post_revision_field_{$field}", $compare_from->$field, $field, $compare_from, 'from' ) : ''; 91 92 /** This filter is documented in wp-admin/includes/revision.php */ 93 $content_to = apply_filters( "_wp_post_revision_field_{$field}", $compare_to->$field, $field, $compare_to, 'to' ); 94 95 $args = array( 96 'show_split_view' => true, 97 'title_left' => __( 'Removed' ), 98 'title_right' => __( 'Added' ), 99 ); 100 101 /** 102 * Filters revisions text diff options. 103 * 104 * Filters the options passed to wp_text_diff() when viewing a post revision. 105 * 106 * @since 4.1.0 107 * 108 * @param array $args { 109 * Associative array of options to pass to wp_text_diff(). 110 * 111 * @type bool $show_split_view True for split view (two columns), false for 112 * un-split view (single column). Default true. 113 * } 114 * @param string $field The current revision field. 115 * @param WP_Post $compare_from The revision post to compare from. 116 * @param WP_Post $compare_to The revision post to compare to. 117 */ 118 $args = apply_filters( 'revision_text_diff_options', $args, $field, $compare_from, $compare_to ); 119 120 $diff = wp_text_diff( $content_from, $content_to, $args ); 121 122 if ( ! $diff && 'post_title' === $field ) { 123 /* 124 * It's a better user experience to still show the Title, even if it didn't change. 125 * No, you didn't see this. 126 */ 127 $diff = '<table class="diff"><colgroup><col class="content diffsplit left"><col class="content diffsplit middle"><col class="content diffsplit right"></colgroup><tbody><tr>'; 128 129 // In split screen mode, show the title before/after side by side. 130 if ( true === $args['show_split_view'] ) { 131 $diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td><td></td><td>' . esc_html( $compare_to->post_title ) . '</td>'; 132 } else { 133 $diff .= '<td>' . esc_html( $compare_from->post_title ) . '</td>'; 134 135 // In single column mode, only show the title once if unchanged. 136 if ( $compare_from->post_title !== $compare_to->post_title ) { 137 $diff .= '</tr><tr><td>' . esc_html( $compare_to->post_title ) . '</td>'; 138 } 139 } 140 141 $diff .= '</tr></tbody>'; 142 $diff .= '</table>'; 143 } 144 145 if ( $diff ) { 146 $return[] = array( 147 'id' => $field, 148 'name' => $name, 149 'diff' => $diff, 150 ); 151 } 152 } 153 154 /** 155 * Filters the fields displayed in the post revision diff UI. 156 * 157 * @since 4.1.0 158 * 159 * @param array[] $return Array of revision UI fields. Each item is an array of id, name, and diff. 160 * @param WP_Post $compare_from The revision post to compare from. 161 * @param WP_Post $compare_to The revision post to compare to. 162 */ 163 return apply_filters( 'wp_get_revision_ui_diff', $return, $compare_from, $compare_to ); 164 } 165 166 /** 167 * Prepare revisions for JavaScript. 168 * 169 * @since 3.6.0 170 * 171 * @param WP_Post|int $post The post object or post ID. 172 * @param int $selected_revision_id The selected revision ID. 173 * @param int $from Optional. The revision ID to compare from. 174 * @return array An associative array of revision data and related settings. 175 */ 176 function wp_prepare_revisions_for_js( $post, $selected_revision_id, $from = null ) { 177 $post = get_post( $post ); 178 $authors = array(); 179 $now_gmt = time(); 180 181 $revisions = wp_get_post_revisions( 182 $post->ID, 183 array( 184 'order' => 'ASC', 185 'check_enabled' => false, 186 ) 187 ); 188 // If revisions are disabled, we only want autosaves and the current post. 189 if ( ! wp_revisions_enabled( $post ) ) { 190 foreach ( $revisions as $revision_id => $revision ) { 191 if ( ! wp_is_post_autosave( $revision ) ) { 192 unset( $revisions[ $revision_id ] ); 193 } 194 } 195 $revisions = array( $post->ID => $post ) + $revisions; 196 } 197 198 $show_avatars = get_option( 'show_avatars' ); 199 200 update_post_author_caches( $revisions ); 201 202 $can_restore = current_user_can( 'edit_post', $post->ID ); 203 $current_id = false; 204 205 foreach ( $revisions as $revision ) { 206 $modified = strtotime( $revision->post_modified ); 207 $modified_gmt = strtotime( $revision->post_modified_gmt . ' +0000' ); 208 if ( $can_restore ) { 209 $restore_link = str_replace( 210 '&', 211 '&', 212 wp_nonce_url( 213 add_query_arg( 214 array( 215 'revision' => $revision->ID, 216 'action' => 'restore', 217 ), 218 admin_url( 'revision.php' ) 219 ), 220 "restore-post_{$revision->ID}" 221 ) 222 ); 223 } 224 225 if ( ! isset( $authors[ $revision->post_author ] ) ) { 226 $authors[ $revision->post_author ] = array( 227 'id' => (int) $revision->post_author, 228 'avatar' => $show_avatars ? get_avatar( $revision->post_author, 32 ) : '', 229 'name' => get_the_author_meta( 'display_name', $revision->post_author ), 230 ); 231 } 232 233 $autosave = (bool) wp_is_post_autosave( $revision ); 234 $current = ! $autosave && $revision->post_modified_gmt === $post->post_modified_gmt; 235 if ( $current && ! empty( $current_id ) ) { 236 // If multiple revisions have the same post_modified_gmt, highest ID is current. 237 if ( $current_id < $revision->ID ) { 238 $revisions[ $current_id ]['current'] = false; 239 $current_id = $revision->ID; 240 } else { 241 $current = false; 242 } 243 } elseif ( $current ) { 244 $current_id = $revision->ID; 245 } 246 247 $revisions_data = array( 248 'id' => $revision->ID, 249 'title' => get_the_title( $post->ID ), 250 'author' => $authors[ $revision->post_author ], 251 'date' => date_i18n( __( 'M j, Y @ H:i' ), $modified ), 252 'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), $modified ), 253 /* translators: %s: Human-readable time difference. */ 254 'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( $modified_gmt, $now_gmt ) ), 255 'autosave' => $autosave, 256 'current' => $current, 257 'restoreUrl' => $can_restore ? $restore_link : false, 258 ); 259 260 /** 261 * Filters the array of revisions used on the revisions screen. 262 * 263 * @since 4.4.0 264 * 265 * @param array $revisions_data { 266 * The bootstrapped data for the revisions screen. 267 * 268 * @type int $id Revision ID. 269 * @type string $title Title for the revision's parent WP_Post object. 270 * @type int $author Revision post author ID. 271 * @type string $date Date the revision was modified. 272 * @type string $dateShort Short-form version of the date the revision was modified. 273 * @type string $timeAgo GMT-aware amount of time ago the revision was modified. 274 * @type bool $autosave Whether the revision is an autosave. 275 * @type bool $current Whether the revision is both not an autosave and the post 276 * modified date matches the revision modified date (GMT-aware). 277 * @type bool|false $restoreUrl URL if the revision can be restored, false otherwise. 278 * } 279 * @param WP_Post $revision The revision's WP_Post object. 280 * @param WP_Post $post The revision's parent WP_Post object. 281 */ 282 $revisions[ $revision->ID ] = apply_filters( 'wp_prepare_revision_for_js', $revisions_data, $revision, $post ); 283 } 284 285 /* 286 * If we only have one revision, the initial revision is missing. This happens 287 * when we have an autosave and the user has clicked 'View the Autosave'. 288 */ 289 if ( 1 === count( $revisions ) ) { 290 $revisions[ $post->ID ] = array( 291 'id' => $post->ID, 292 'title' => get_the_title( $post->ID ), 293 'author' => $authors[ $revision->post_author ], 294 'date' => date_i18n( __( 'M j, Y @ H:i' ), strtotime( $post->post_modified ) ), 295 'dateShort' => date_i18n( _x( 'j M @ H:i', 'revision date short format' ), strtotime( $post->post_modified ) ), 296 /* translators: %s: Human-readable time difference. */ 297 'timeAgo' => sprintf( __( '%s ago' ), human_time_diff( strtotime( $post->post_modified_gmt ), $now_gmt ) ), 298 'autosave' => false, 299 'current' => true, 300 'restoreUrl' => false, 301 ); 302 $current_id = $post->ID; 303 } 304 305 /* 306 * If a post has been saved since the latest revision (no revisioned fields 307 * were changed), we may not have a "current" revision. Mark the latest 308 * revision as "current". 309 */ 310 if ( empty( $current_id ) ) { 311 if ( $revisions[ $revision->ID ]['autosave'] ) { 312 $revision = end( $revisions ); 313 while ( $revision['autosave'] ) { 314 $revision = prev( $revisions ); 315 } 316 $current_id = $revision['id']; 317 } else { 318 $current_id = $revision->ID; 319 } 320 $revisions[ $current_id ]['current'] = true; 321 } 322 323 // Now, grab the initial diff. 324 $compare_two_mode = is_numeric( $from ); 325 if ( ! $compare_two_mode ) { 326 $found = array_search( $selected_revision_id, array_keys( $revisions ), true ); 327 if ( $found ) { 328 $from = array_keys( array_slice( $revisions, $found - 1, 1, true ) ); 329 $from = reset( $from ); 330 } else { 331 $from = 0; 332 } 333 } 334 335 $from = absint( $from ); 336 337 $diffs = array( 338 array( 339 'id' => $from . ':' . $selected_revision_id, 340 'fields' => wp_get_revision_ui_diff( $post->ID, $from, $selected_revision_id ), 341 ), 342 ); 343 344 return array( 345 'postId' => $post->ID, 346 'nonce' => wp_create_nonce( 'revisions-ajax-nonce' ), 347 'revisionData' => array_values( $revisions ), 348 'to' => $selected_revision_id, 349 'from' => $from, 350 'diffData' => $diffs, 351 'baseUrl' => parse_url( admin_url( 'revision.php' ), PHP_URL_PATH ), 352 'compareTwoMode' => absint( $compare_two_mode ), // Apparently booleans are not allowed. 353 'revisionIds' => array_keys( $revisions ), 354 ); 355 } 356 357 /** 358 * Print JavaScript templates required for the revisions experience. 359 * 360 * @since 4.1.0 361 * 362 * @global WP_Post $post Global post object. 363 */ 364 function wp_print_revision_templates() { 365 global $post; 366 ?><script id="tmpl-revisions-frame" type="text/html"> 367 <div class="revisions-control-frame"></div> 368 <div class="revisions-diff-frame"></div> 369 </script> 370 371 <script id="tmpl-revisions-buttons" type="text/html"> 372 <div class="revisions-previous"> 373 <input class="button" type="button" value="<?php echo esc_attr_x( 'Previous', 'Button label for a previous revision' ); ?>" /> 374 </div> 375 376 <div class="revisions-next"> 377 <input class="button" type="button" value="<?php echo esc_attr_x( 'Next', 'Button label for a next revision' ); ?>" /> 378 </div> 379 </script> 380 381 <script id="tmpl-revisions-slider-hidden-help" type="text/html"> 382 <h2 class="screen-reader-text"><?php esc_html_e( 'Select a revision' ); ?></h2> 383 <p id="revisions-slider-hidden-help" hidden><?php esc_html_e( 'Change revision by using the left and right arrow keys' ); ?></p> 384 </script> 385 386 <script id="tmpl-revisions-checkbox" type="text/html"> 387 <div class="revision-toggle-compare-mode"> 388 <label> 389 <input type="checkbox" class="compare-two-revisions" 390 <# 391 if ( 'undefined' !== typeof data && data.model.attributes.compareTwoMode ) { 392 #> checked="checked"<# 393 } 394 #> 395 /> 396 <?php esc_html_e( 'Compare any two revisions' ); ?> 397 </label> 398 </div> 399 </script> 400 401 <script id="tmpl-revisions-meta" type="text/html"> 402 <# if ( ! _.isUndefined( data.attributes ) ) { #> 403 <div class="diff-title"> 404 <# if ( 'from' === data.type ) { #> 405 <strong id="diff-title-from"><?php _ex( 'From:', 'Followed by post revision info' ); ?></strong> 406 <# } else if ( 'to' === data.type ) { #> 407 <strong id="diff-title-to"><?php _ex( 'To:', 'Followed by post revision info' ); ?></strong> 408 <# } #> 409 <div class="author-card<# if ( data.attributes.autosave ) { #> autosave<# } #>"> 410 {{{ data.attributes.author.avatar }}} 411 <div class="author-info" id="diff-title-author"> 412 <# if ( data.attributes.autosave ) { #> 413 <span class="byline"> 414 <?php 415 printf( 416 /* translators: %s: User's display name. */ 417 __( 'Autosave by %s' ), 418 '<span class="author-name">{{ data.attributes.author.name }}</span>' 419 ); 420 ?> 421 </span> 422 <# } else if ( data.attributes.current ) { #> 423 <span class="byline"> 424 <?php 425 printf( 426 /* translators: %s: User's display name. */ 427 __( 'Current Revision by %s' ), 428 '<span class="author-name">{{ data.attributes.author.name }}</span>' 429 ); 430 ?> 431 </span> 432 <# } else { #> 433 <span class="byline"> 434 <?php 435 printf( 436 /* translators: %s: User's display name. */ 437 __( 'Revision by %s' ), 438 '<span class="author-name">{{ data.attributes.author.name }}</span>' 439 ); 440 ?> 441 </span> 442 <# } #> 443 <span class="time-ago">{{ data.attributes.timeAgo }}</span> 444 <span class="date">({{ data.attributes.dateShort }})</span> 445 </div> 446 <# if ( 'to' === data.type && data.attributes.restoreUrl ) { #> 447 <input <?php if ( wp_check_post_lock( $post->ID ) ) { ?> 448 disabled="disabled" 449 <?php } else { ?> 450 <# if ( data.attributes.current ) { #> 451 disabled="disabled" 452 <# } #> 453 <?php } ?> 454 <# if ( data.attributes.autosave ) { #> 455 type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Autosave' ); ?>" /> 456 <# } else { #> 457 type="button" class="restore-revision button button-primary" value="<?php esc_attr_e( 'Restore This Revision' ); ?>" /> 458 <# } #> 459 <# } #> 460 </div> 461 <# if ( 'tooltip' === data.type ) { #> 462 <div class="revisions-tooltip-arrow"><span></span></div> 463 <# } #> 464 <# } #> 465 </script> 466 467 <script id="tmpl-revisions-diff" type="text/html"> 468 <div class="loading-indicator"><span class="spinner"></span></div> 469 <div class="diff-error"><?php _e( 'Sorry, something went wrong. The requested comparison could not be loaded.' ); ?></div> 470 <div class="diff"> 471 <# _.each( data.fields, function( field ) { #> 472 <h2>{{ field.name }}</h2> 473 {{{ field.diff }}} 474 <# }); #> 475 </div> 476 </script> 477 <?php 478 }
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| Generated : Thu Nov 21 08:20:01 2024 | Cross-referenced by PHPXref |