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1 <?php 2 /** 3 * The custom background script. 4 * 5 * @package WordPress 6 * @subpackage Administration 7 */ 8 9 /** 10 * The custom background class. 11 * 12 * @since 3.0.0 13 */ 14 class Custom_Background { 15 16 /** 17 * Callback for administration header. 18 * 19 * @var callable 20 * @since 3.0.0 21 */ 22 public $admin_header_callback; 23 24 /** 25 * Callback for header div. 26 * 27 * @var callable 28 * @since 3.0.0 29 */ 30 public $admin_image_div_callback; 31 32 /** 33 * Used to trigger a success message when settings updated and set to true. 34 * 35 * @since 3.0.0 36 * @var bool 37 */ 38 private $updated; 39 40 /** 41 * Constructor - Register administration header callback. 42 * 43 * @since 3.0.0 44 * @param callable $admin_header_callback 45 * @param callable $admin_image_div_callback Optional custom image div output callback. 46 */ 47 public function __construct( $admin_header_callback = '', $admin_image_div_callback = '' ) { 48 $this->admin_header_callback = $admin_header_callback; 49 $this->admin_image_div_callback = $admin_image_div_callback; 50 51 add_action( 'admin_menu', array( $this, 'init' ) ); 52 53 add_action( 'wp_ajax_custom-background-add', array( $this, 'ajax_background_add' ) ); 54 55 // Unused since 3.5.0. 56 add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) ); 57 } 58 59 /** 60 * Set up the hooks for the Custom Background admin page. 61 * 62 * @since 3.0.0 63 */ 64 public function init() { 65 $page = add_theme_page( __( 'Background' ), __( 'Background' ), 'edit_theme_options', 'custom-background', array( $this, 'admin_page' ) ); 66 if ( ! $page ) { 67 return; 68 } 69 70 add_action( "load-{$page}", array( $this, 'admin_load' ) ); 71 add_action( "load-{$page}", array( $this, 'take_action' ), 49 ); 72 add_action( "load-{$page}", array( $this, 'handle_upload' ), 49 ); 73 74 if ( $this->admin_header_callback ) { 75 add_action( "admin_head-{$page}", $this->admin_header_callback, 51 ); 76 } 77 } 78 79 /** 80 * Set up the enqueue for the CSS & JavaScript files. 81 * 82 * @since 3.0.0 83 */ 84 public function admin_load() { 85 get_current_screen()->add_help_tab( 86 array( 87 'id' => 'overview', 88 'title' => __( 'Overview' ), 89 'content' => 90 '<p>' . __( 'You can customize the look of your site without touching any of your theme’s code by using a custom background. Your background can be an image or a color.' ) . '</p>' . 91 '<p>' . __( 'To use a background image, simply upload it or choose an image that has already been uploaded to your Media Library by clicking the “Choose Image” button. You can display a single instance of your image, or tile it to fill the screen. You can have your background fixed in place, so your site content moves on top of it, or you can have it scroll with your site.' ) . '</p>' . 92 '<p>' . __( 'You can also choose a background color by clicking the Select Color button and either typing in a legitimate HTML hex value, e.g. “#ff0000” for red, or by choosing a color using the color picker.' ) . '</p>' . 93 '<p>' . __( 'Do not forget to click on the Save Changes button when you are finished.' ) . '</p>', 94 ) 95 ); 96 97 get_current_screen()->set_help_sidebar( 98 '<p><strong>' . __( 'For more information:' ) . '</strong></p>' . 99 '<p>' . __( '<a href="https://codex.wordpress.org/Appearance_Background_Screen">Documentation on Custom Background</a>' ) . '</p>' . 100 '<p>' . __( '<a href="https://wordpress.org/support/">Support</a>' ) . '</p>' 101 ); 102 103 wp_enqueue_media(); 104 wp_enqueue_script( 'custom-background' ); 105 wp_enqueue_style( 'wp-color-picker' ); 106 } 107 108 /** 109 * Execute custom background modification. 110 * 111 * @since 3.0.0 112 */ 113 public function take_action() { 114 if ( empty( $_POST ) ) { 115 return; 116 } 117 118 if ( isset( $_POST['reset-background'] ) ) { 119 check_admin_referer( 'custom-background-reset', '_wpnonce-custom-background-reset' ); 120 121 remove_theme_mod( 'background_image' ); 122 remove_theme_mod( 'background_image_thumb' ); 123 124 $this->updated = true; 125 return; 126 } 127 128 if ( isset( $_POST['remove-background'] ) ) { 129 // @todo Uploaded files are not removed here. 130 check_admin_referer( 'custom-background-remove', '_wpnonce-custom-background-remove' ); 131 132 set_theme_mod( 'background_image', '' ); 133 set_theme_mod( 'background_image_thumb', '' ); 134 135 $this->updated = true; 136 wp_safe_redirect( $_POST['_wp_http_referer'] ); 137 return; 138 } 139 140 if ( isset( $_POST['background-preset'] ) ) { 141 check_admin_referer( 'custom-background' ); 142 143 if ( in_array( $_POST['background-preset'], array( 'default', 'fill', 'fit', 'repeat', 'custom' ), true ) ) { 144 $preset = $_POST['background-preset']; 145 } else { 146 $preset = 'default'; 147 } 148 149 set_theme_mod( 'background_preset', $preset ); 150 } 151 152 if ( isset( $_POST['background-position'] ) ) { 153 check_admin_referer( 'custom-background' ); 154 155 $position = explode( ' ', $_POST['background-position'] ); 156 157 if ( in_array( $position[0], array( 'left', 'center', 'right' ), true ) ) { 158 $position_x = $position[0]; 159 } else { 160 $position_x = 'left'; 161 } 162 163 if ( in_array( $position[1], array( 'top', 'center', 'bottom' ), true ) ) { 164 $position_y = $position[1]; 165 } else { 166 $position_y = 'top'; 167 } 168 169 set_theme_mod( 'background_position_x', $position_x ); 170 set_theme_mod( 'background_position_y', $position_y ); 171 } 172 173 if ( isset( $_POST['background-size'] ) ) { 174 check_admin_referer( 'custom-background' ); 175 176 if ( in_array( $_POST['background-size'], array( 'auto', 'contain', 'cover' ), true ) ) { 177 $size = $_POST['background-size']; 178 } else { 179 $size = 'auto'; 180 } 181 182 set_theme_mod( 'background_size', $size ); 183 } 184 185 if ( isset( $_POST['background-repeat'] ) ) { 186 check_admin_referer( 'custom-background' ); 187 188 $repeat = $_POST['background-repeat']; 189 190 if ( 'no-repeat' !== $repeat ) { 191 $repeat = 'repeat'; 192 } 193 194 set_theme_mod( 'background_repeat', $repeat ); 195 } 196 197 if ( isset( $_POST['background-attachment'] ) ) { 198 check_admin_referer( 'custom-background' ); 199 200 $attachment = $_POST['background-attachment']; 201 202 if ( 'fixed' !== $attachment ) { 203 $attachment = 'scroll'; 204 } 205 206 set_theme_mod( 'background_attachment', $attachment ); 207 } 208 209 if ( isset( $_POST['background-color'] ) ) { 210 check_admin_referer( 'custom-background' ); 211 212 $color = preg_replace( '/[^0-9a-fA-F]/', '', $_POST['background-color'] ); 213 214 if ( strlen( $color ) === 6 || strlen( $color ) === 3 ) { 215 set_theme_mod( 'background_color', $color ); 216 } else { 217 set_theme_mod( 'background_color', '' ); 218 } 219 } 220 221 $this->updated = true; 222 } 223 224 /** 225 * Display the custom background page. 226 * 227 * @since 3.0.0 228 */ 229 public function admin_page() { 230 ?> 231 <div class="wrap" id="custom-background"> 232 <h1><?php _e( 'Custom Background' ); ?></h1> 233 234 <?php if ( current_user_can( 'customize' ) ) { ?> 235 <div class="notice notice-info hide-if-no-customize"> 236 <p> 237 <?php 238 printf( 239 /* translators: %s: URL to background image configuration in Customizer. */ 240 __( 'You can now manage and live-preview Custom Backgrounds in the <a href="%s">Customizer</a>.' ), 241 admin_url( 'customize.php?autofocus[control]=background_image' ) 242 ); 243 ?> 244 </p> 245 </div> 246 <?php } ?> 247 248 <?php if ( ! empty( $this->updated ) ) { ?> 249 <div id="message" class="updated"> 250 <p> 251 <?php 252 /* translators: %s: Home URL. */ 253 printf( __( 'Background updated. <a href="%s">Visit your site</a> to see how it looks.' ), home_url( '/' ) ); 254 ?> 255 </p> 256 </div> 257 <?php } ?> 258 259 <h2><?php _e( 'Background Image' ); ?></h2> 260 261 <table class="form-table" role="presentation"> 262 <tbody> 263 <tr> 264 <th scope="row"><?php _e( 'Preview' ); ?></th> 265 <td> 266 <?php 267 if ( $this->admin_image_div_callback ) { 268 call_user_func( $this->admin_image_div_callback ); 269 } else { 270 $background_styles = ''; 271 $bgcolor = get_background_color(); 272 if ( $bgcolor ) { 273 $background_styles .= 'background-color: #' . $bgcolor . ';'; 274 } 275 276 $background_image_thumb = get_background_image(); 277 if ( $background_image_thumb ) { 278 $background_image_thumb = esc_url( set_url_scheme( get_theme_mod( 'background_image_thumb', str_replace( '%', '%%', $background_image_thumb ) ) ) ); 279 $background_position_x = get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) ); 280 $background_position_y = get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) ); 281 $background_size = get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ); 282 $background_repeat = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) ); 283 $background_attachment = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) ); 284 285 // Background-image URL must be single quote, see below. 286 $background_styles .= " background-image: url('$background_image_thumb');" 287 . " background-size: $background_size;" 288 . " background-position: $background_position_x $background_position_y;" 289 . " background-repeat: $background_repeat;" 290 . " background-attachment: $background_attachment;"; 291 } 292 ?> 293 <div id="custom-background-image" style="<?php echo $background_styles; ?>"><?php // Must be double quote, see above. ?> 294 <?php if ( $background_image_thumb ) { ?> 295 <img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" /><br /> 296 <img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" /> 297 <?php } ?> 298 </div> 299 <?php } ?> 300 </td> 301 </tr> 302 303 <?php if ( get_background_image() ) : ?> 304 <tr> 305 <th scope="row"><?php _e( 'Remove Image' ); ?></th> 306 <td> 307 <form method="post"> 308 <?php wp_nonce_field( 'custom-background-remove', '_wpnonce-custom-background-remove' ); ?> 309 <?php submit_button( __( 'Remove Background Image' ), '', 'remove-background', false ); ?><br/> 310 <?php _e( 'This will remove the background image. You will not be able to restore any customizations.' ); ?> 311 </form> 312 </td> 313 </tr> 314 <?php endif; ?> 315 316 <?php $default_image = get_theme_support( 'custom-background', 'default-image' ); ?> 317 <?php if ( $default_image && get_background_image() !== $default_image ) : ?> 318 <tr> 319 <th scope="row"><?php _e( 'Restore Original Image' ); ?></th> 320 <td> 321 <form method="post"> 322 <?php wp_nonce_field( 'custom-background-reset', '_wpnonce-custom-background-reset' ); ?> 323 <?php submit_button( __( 'Restore Original Image' ), '', 'reset-background', false ); ?><br/> 324 <?php _e( 'This will restore the original background image. You will not be able to restore any customizations.' ); ?> 325 </form> 326 </td> 327 </tr> 328 <?php endif; ?> 329 330 <?php if ( current_user_can( 'upload_files' ) ) : ?> 331 <tr> 332 <th scope="row"><?php _e( 'Select Image' ); ?></th> 333 <td><form enctype="multipart/form-data" id="upload-form" class="wp-upload-form" method="post"> 334 <p> 335 <label for="upload"><?php _e( 'Choose an image from your computer:' ); ?></label><br /> 336 <input type="file" id="upload" name="import" /> 337 <input type="hidden" name="action" value="save" /> 338 <?php wp_nonce_field( 'custom-background-upload', '_wpnonce-custom-background-upload' ); ?> 339 <?php submit_button( __( 'Upload' ), '', 'submit', false ); ?> 340 </p> 341 <p> 342 <label for="choose-from-library-link"><?php _e( 'Or choose an image from your media library:' ); ?></label><br /> 343 <button id="choose-from-library-link" class="button" 344 data-choose="<?php esc_attr_e( 'Choose a Background Image' ); ?>" 345 data-update="<?php esc_attr_e( 'Set as background' ); ?>"><?php _e( 'Choose Image' ); ?></button> 346 </p> 347 </form> 348 </td> 349 </tr> 350 <?php endif; ?> 351 </tbody> 352 </table> 353 354 <h2><?php _e( 'Display Options' ); ?></h2> 355 <form method="post"> 356 <table class="form-table" role="presentation"> 357 <tbody> 358 <?php if ( get_background_image() ) : ?> 359 <input name="background-preset" type="hidden" value="custom"> 360 361 <?php 362 $background_position = sprintf( 363 '%s %s', 364 get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) ), 365 get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) ) 366 ); 367 368 $background_position_options = array( 369 array( 370 'left top' => array( 371 'label' => __( 'Top Left' ), 372 'icon' => 'dashicons dashicons-arrow-left-alt', 373 ), 374 'center top' => array( 375 'label' => __( 'Top' ), 376 'icon' => 'dashicons dashicons-arrow-up-alt', 377 ), 378 'right top' => array( 379 'label' => __( 'Top Right' ), 380 'icon' => 'dashicons dashicons-arrow-right-alt', 381 ), 382 ), 383 array( 384 'left center' => array( 385 'label' => __( 'Left' ), 386 'icon' => 'dashicons dashicons-arrow-left-alt', 387 ), 388 'center center' => array( 389 'label' => __( 'Center' ), 390 'icon' => 'background-position-center-icon', 391 ), 392 'right center' => array( 393 'label' => __( 'Right' ), 394 'icon' => 'dashicons dashicons-arrow-right-alt', 395 ), 396 ), 397 array( 398 'left bottom' => array( 399 'label' => __( 'Bottom Left' ), 400 'icon' => 'dashicons dashicons-arrow-left-alt', 401 ), 402 'center bottom' => array( 403 'label' => __( 'Bottom' ), 404 'icon' => 'dashicons dashicons-arrow-down-alt', 405 ), 406 'right bottom' => array( 407 'label' => __( 'Bottom Right' ), 408 'icon' => 'dashicons dashicons-arrow-right-alt', 409 ), 410 ), 411 ); 412 ?> 413 <tr> 414 <th scope="row"><?php _e( 'Image Position' ); ?></th> 415 <td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Image Position' ); ?></span></legend> 416 <div class="background-position-control"> 417 <?php foreach ( $background_position_options as $group ) : ?> 418 <div class="button-group"> 419 <?php foreach ( $group as $value => $input ) : ?> 420 <label> 421 <input class="ui-helper-hidden-accessible" name="background-position" type="radio" value="<?php echo esc_attr( $value ); ?>"<?php checked( $value, $background_position ); ?>> 422 <span class="button display-options position"><span class="<?php echo esc_attr( $input['icon'] ); ?>" aria-hidden="true"></span></span> 423 <span class="screen-reader-text"><?php echo $input['label']; ?></span> 424 </label> 425 <?php endforeach; ?> 426 </div> 427 <?php endforeach; ?> 428 </div> 429 </fieldset></td> 430 </tr> 431 432 <tr> 433 <th scope="row"><label for="background-size"><?php _e( 'Image Size' ); ?></label></th> 434 <td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Image Size' ); ?></span></legend> 435 <select id="background-size" name="background-size"> 436 <option value="auto"<?php selected( 'auto', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _ex( 'Original', 'Original Size' ); ?></option> 437 <option value="contain"<?php selected( 'contain', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fit to Screen' ); ?></option> 438 <option value="cover"<?php selected( 'cover', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fill Screen' ); ?></option> 439 </select> 440 </fieldset></td> 441 </tr> 442 443 <tr> 444 <th scope="row"><?php _ex( 'Repeat', 'Background Repeat' ); ?></th> 445 <td><fieldset><legend class="screen-reader-text"><span><?php _ex( 'Repeat', 'Background Repeat' ); ?></span></legend> 446 <input name="background-repeat" type="hidden" value="no-repeat"> 447 <label><input type="checkbox" name="background-repeat" value="repeat"<?php checked( 'repeat', get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) ) ); ?>> <?php _e( 'Repeat Background Image' ); ?></label> 448 </fieldset></td> 449 </tr> 450 451 <tr> 452 <th scope="row"><?php _ex( 'Scroll', 'Background Scroll' ); ?></th> 453 <td><fieldset><legend class="screen-reader-text"><span><?php _ex( 'Scroll', 'Background Scroll' ); ?></span></legend> 454 <input name="background-attachment" type="hidden" value="fixed"> 455 <label><input name="background-attachment" type="checkbox" value="scroll" <?php checked( 'scroll', get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) ) ); ?>> <?php _e( 'Scroll with Page' ); ?></label> 456 </fieldset></td> 457 </tr> 458 <?php endif; // get_background_image() ?> 459 <tr> 460 <th scope="row"><?php _e( 'Background Color' ); ?></th> 461 <td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Color' ); ?></span></legend> 462 <?php 463 $default_color = ''; 464 if ( current_theme_supports( 'custom-background', 'default-color' ) ) { 465 $default_color = ' data-default-color="#' . esc_attr( get_theme_support( 'custom-background', 'default-color' ) ) . '"'; 466 } 467 ?> 468 <input type="text" name="background-color" id="background-color" value="#<?php echo esc_attr( get_background_color() ); ?>"<?php echo $default_color; ?>> 469 </fieldset></td> 470 </tr> 471 </tbody> 472 </table> 473 474 <?php wp_nonce_field( 'custom-background' ); ?> 475 <?php submit_button( null, 'primary', 'save-background-options' ); ?> 476 </form> 477 478 </div> 479 <?php 480 } 481 482 /** 483 * Handle an Image upload for the background image. 484 * 485 * @since 3.0.0 486 */ 487 public function handle_upload() { 488 if ( empty( $_FILES ) ) { 489 return; 490 } 491 492 check_admin_referer( 'custom-background-upload', '_wpnonce-custom-background-upload' ); 493 494 $overrides = array( 'test_form' => false ); 495 496 $uploaded_file = $_FILES['import']; 497 $wp_filetype = wp_check_filetype_and_ext( $uploaded_file['tmp_name'], $uploaded_file['name'] ); 498 if ( ! wp_match_mime_types( 'image', $wp_filetype['type'] ) ) { 499 wp_die( __( 'The uploaded file is not a valid image. Please try again.' ) ); 500 } 501 502 $file = wp_handle_upload( $uploaded_file, $overrides ); 503 504 if ( isset( $file['error'] ) ) { 505 wp_die( $file['error'] ); 506 } 507 508 $url = $file['url']; 509 $type = $file['type']; 510 $file = $file['file']; 511 $filename = wp_basename( $file ); 512 513 // Construct the attachment array. 514 $attachment = array( 515 'post_title' => $filename, 516 'post_content' => $url, 517 'post_mime_type' => $type, 518 'guid' => $url, 519 'context' => 'custom-background', 520 ); 521 522 // Save the data. 523 $id = wp_insert_attachment( $attachment, $file ); 524 525 // Add the metadata. 526 wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) ); 527 update_post_meta( $id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) ); 528 529 set_theme_mod( 'background_image', esc_url_raw( $url ) ); 530 531 $thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' ); 532 set_theme_mod( 'background_image_thumb', esc_url_raw( $thumbnail[0] ) ); 533 534 /** This action is documented in wp-admin/includes/class-custom-image-header.php */ 535 do_action( 'wp_create_file_in_uploads', $file, $id ); // For replication. 536 $this->updated = true; 537 } 538 539 /** 540 * Ajax handler for adding custom background context to an attachment. 541 * 542 * Triggers when the user adds a new background image from the 543 * Media Manager. 544 * 545 * @since 4.1.0 546 */ 547 public function ajax_background_add() { 548 check_ajax_referer( 'background-add', 'nonce' ); 549 550 if ( ! current_user_can( 'edit_theme_options' ) ) { 551 wp_send_json_error(); 552 } 553 554 $attachment_id = absint( $_POST['attachment_id'] ); 555 if ( $attachment_id < 1 ) { 556 wp_send_json_error(); 557 } 558 559 update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_stylesheet() ); 560 561 wp_send_json_success(); 562 } 563 564 /** 565 * @since 3.4.0 566 * @deprecated 3.5.0 567 * 568 * @param array $form_fields 569 * @return array $form_fields 570 */ 571 public function attachment_fields_to_edit( $form_fields ) { 572 return $form_fields; 573 } 574 575 /** 576 * @since 3.4.0 577 * @deprecated 3.5.0 578 * 579 * @param array $tabs 580 * @return array $tabs 581 */ 582 public function filter_upload_tabs( $tabs ) { 583 return $tabs; 584 } 585 586 /** 587 * @since 3.4.0 588 * @deprecated 3.5.0 589 */ 590 public function wp_set_background_image() { 591 check_ajax_referer( 'custom-background' ); 592 593 if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) { 594 exit; 595 } 596 597 $attachment_id = absint( $_POST['attachment_id'] ); 598 599 $sizes = array_keys( 600 /** This filter is documented in wp-admin/includes/media.php */ 601 apply_filters( 602 'image_size_names_choose', 603 array( 604 'thumbnail' => __( 'Thumbnail' ), 605 'medium' => __( 'Medium' ), 606 'large' => __( 'Large' ), 607 'full' => __( 'Full Size' ), 608 ) 609 ) 610 ); 611 612 $size = 'thumbnail'; 613 if ( in_array( $_POST['size'], $sizes, true ) ) { 614 $size = esc_attr( $_POST['size'] ); 615 } 616 617 update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) ); 618 619 $url = wp_get_attachment_image_src( $attachment_id, $size ); 620 $thumbnail = wp_get_attachment_image_src( $attachment_id, 'thumbnail' ); 621 set_theme_mod( 'background_image', esc_url_raw( $url[0] ) ); 622 set_theme_mod( 'background_image_thumb', esc_url_raw( $thumbnail[0] ) ); 623 exit; 624 } 625 }
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