<?php

/**

 * The custom background script.

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * The custom background class.

 *

 * @since 3.0.0

 * @package WordPress

 * @subpackage Administration

 */

class Custom_Background {

	/**

	 * Callback for administration header.

	 *

	 * @var callback

	 * @since 3.0.0

	 * @access private

	 */

	var $admin_header_callback;

	/**

	 * Callback for header div.

	 *

	 * @var callback

	 * @since 3.0.0

	 * @access private

	 */

	var $admin_image_div_callback;

	/**

	 * Holds the page menu hook.

	 *

	 * @var string

	 * @since 3.0.0

	 * @access private

	 */

	var $page = '';

	/**

	 * Constructor - Register administration header callback.

	 *

	 * @since 3.0.0

	 * @param callback $admin_header_callback

	 * @param callback $admin_image_div_callback Optional custom image div output callback.

	 * @return Custom_Background

	 */

	function __construct($admin_header_callback = '', $admin_image_div_callback = '') {

		$this->admin_header_callback = $admin_header_callback;

		$this->admin_image_div_callback = $admin_image_div_callback;

		add_action( 'admin_menu', array( $this, 'init' ) );

		add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) );

	}

	/**

	 * Set up the hooks for the Custom Background admin page.

	 *

	 * @since 3.0.0

	 */

	function init() {

		if ( ! current_user_can('edit_theme_options') )

			return;

		$this->page = $page = add_theme_page(__('Background'), __('Background'), 'edit_theme_options', 'custom-background', array(&$this, 'admin_page'));

		add_action("load-$page", array(&$this, 'admin_load'));

		add_action("load-$page", array(&$this, 'take_action'), 49);

		add_action("load-$page", array(&$this, 'handle_upload'), 49);

		if ( $this->admin_header_callback )

			add_action("admin_head-$page", $this->admin_header_callback, 51);

	}

	/**

	 * Set up the enqueue for the CSS & JavaScript files.

	 *

	 * @since 3.0.0

	 */

	function admin_load() {

		get_current_screen()->add_help_tab( array(

			'id'      => 'overview',

			'title'   => __('Overview'),

			'content' =>

				'<p>' . __( 'You can customize the look of your site without touching any of your theme&#8217;s code by using a custom background. Your background can be an image or a color.' ) . '</p>' .

				'<p>' . __( 'Don&#8217;t forget to click on the Save Changes button when you are finished.' ) . '</p>'

		) );

		get_current_screen()->set_help_sidebar(

			'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .

			'<p>' . __( '<a href="http://codex.wordpress.org/Appearance_Background_Screen" target="_blank">Documentation on Custom Background</a>' ) . '</p>' .

			'<p>' . __( '<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>' ) . '</p>'

		);

		wp_enqueue_script('custom-background');

	}

	/**

	 * Execute custom background modification.

	 *

	 * @since 3.0.0

	 */

	function take_action() {

		if ( empty($_POST) )

			return;

		if ( isset($_POST['reset-background']) ) {

			check_admin_referer('custom-background-reset', '_wpnonce-custom-background-reset');

			remove_theme_mod('background_image');

			remove_theme_mod('background_image_thumb');

			$this->updated = true;

			return;

		}

		if ( isset($_POST['remove-background']) ) {

			// @TODO: Uploaded files are not removed here.

			check_admin_referer('custom-background-remove', '_wpnonce-custom-background-remove');

			set_theme_mod('background_image', '');

			set_theme_mod('background_image_thumb', '');

			$this->updated = true;

			wp_safe_redirect( $_POST['_wp_http_referer'] );

			return;

		}

		if ( isset($_POST['background-repeat']) ) {

			check_admin_referer('custom-background');

			if ( in_array($_POST['background-repeat'], array('repeat', 'no-repeat', 'repeat-x', 'repeat-y')) )

				$repeat = $_POST['background-repeat'];

			else

				$repeat = 'repeat';

			set_theme_mod('background_repeat', $repeat);

		}

		if ( isset($_POST['background-position-x']) ) {

			check_admin_referer('custom-background');

			if ( in_array($_POST['background-position-x'], array('center', 'right', 'left')) )

				$position = $_POST['background-position-x'];

			else

				$position = 'left';

			set_theme_mod('background_position_x', $position);

		}

		if ( isset($_POST['background-attachment']) ) {

			check_admin_referer('custom-background');

			if ( in_array($_POST['background-attachment'], array('fixed', 'scroll')) )

				$attachment = $_POST['background-attachment'];

			else

				$attachment = 'fixed';

			set_theme_mod('background_attachment', $attachment);

		}

		if ( isset($_POST['background-color']) ) {

			check_admin_referer('custom-background');

			$color = preg_replace('/[^0-9a-fA-F]/', '', $_POST['background-color']);

			if ( strlen($color) == 6 || strlen($color) == 3 )

				set_theme_mod('background_color', $color);

			else

				set_theme_mod('background_color', '');

		}

		$this->updated = true;

	}

	/**

	 * Display the custom background page.

	 *

	 * @since 3.0.0

	 */

	function admin_page() {

?>

<div class="wrap" id="custom-background">

<?php screen_icon(); ?>

<h2><?php _e('Custom Background'); ?></h2>

<?php if ( !empty($this->updated) ) { ?>

<div id="message" class="updated">

<p><?php printf( __( 'Background updated. <a href="%s">Visit your site</a> to see how it looks.' ), home_url( '/' ) ); ?></p>

</div>

<?php }

	if ( $this->admin_image_div_callback ) {

		call_user_func($this->admin_image_div_callback);

	} else {

?>

<h3><?php _e('Background Image'); ?></h3>

<table class="form-table">

<tbody>

<tr valign="top">

<th scope="row"><?php _e('Preview'); ?></th>

<td>

<?php

$background_styles = '';

if ( $bgcolor = get_background_color() )

	$background_styles .= 'background-color: #' . $bgcolor . ';';

if ( get_background_image() ) {

	// background-image URL must be single quote, see below

	$background_styles .= ' background-image: url(\'' . set_url_scheme( get_theme_mod( 'background_image_thumb', get_background_image() ) ) . '\');'

		. ' background-repeat: ' . get_theme_mod('background_repeat', 'repeat') . ';'

		. ' background-position: top ' . get_theme_mod('background_position_x', 'left');

}

?>

<div id="custom-background-image" style="<?php echo $background_styles; ?>"><?php // must be double quote, see above ?>

<?php if ( get_background_image() ) { ?>

<img class="custom-background-image" src="<?php echo set_url_scheme( get_theme_mod( 'background_image_thumb', get_background_image() ) ); ?>" style="visibility:hidden;" alt="" /><br />

<img class="custom-background-image" src="<?php echo set_url_scheme( get_theme_mod( 'background_image_thumb', get_background_image() ) ); ?>" style="visibility:hidden;" alt="" />

<?php } ?>

</div>

<?php } ?>

</td>

</tr>

<?php if ( get_background_image() ) : ?>

<tr valign="top">

<th scope="row"><?php _e('Remove Image'); ?></th>

<td>

<form method="post" action="">

<?php wp_nonce_field('custom-background-remove', '_wpnonce-custom-background-remove'); ?>

<?php submit_button( __( 'Remove Background Image' ), 'button', 'remove-background', false ); ?><br/>

<?php _e('This will remove the background image. You will not be able to restore any customizations.') ?>

</form>

</td>

</tr>

<?php endif; ?>

<?php $default_image = get_theme_support( 'custom-background', 'default-image' ); ?>

<?php if ( $default_image && get_background_image() != $default_image ) : ?>

<tr valign="top">

<th scope="row"><?php _e('Restore Original Image'); ?></th>

<td>

<form method="post" action="">

<?php wp_nonce_field('custom-background-reset', '_wpnonce-custom-background-reset'); ?>

<?php submit_button( __( 'Restore Original Image' ), 'button', 'reset-background', false ); ?><br/>

<?php _e('This will restore the original background image. You will not be able to restore any customizations.') ?>

</form>

</td>

</tr>

<?php endif; ?>

<tr valign="top">

<th scope="row"><?php _e('Select Image'); ?></th>

	<p>

		<label for="upload"><?php _e( 'Choose an image from your computer:' ); ?></label><br />

		<input type="file" id="upload" name="import" />

		<input type="hidden" name="action" value="save" />

		<?php wp_nonce_field( 'custom-background-upload', '_wpnonce-custom-background-upload' ); ?>

		<?php submit_button( __( 'Upload' ), 'button', 'submit', false ); ?>

	</p>

	<p>

		<label for="choose-from-library-link"><?php _e( 'Or choose an image from your media library:' ); ?></label><br />

	</p>

	</form>

</td>

</tr>

</tbody>

</table>

<h3><?php _e('Display Options') ?></h3>

<form method="post" action="">

<table class="form-table">

<tbody>

<?php if ( get_background_image() ) : ?>

<tr valign="top">

<th scope="row"><?php _e( 'Position' ); ?></th>

<td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Position' ); ?></span></legend>

<label>

<input name="background-position-x" type="radio" value="left"<?php checked('left', get_theme_mod('background_position_x', 'left')); ?> />

<?php _e('Left') ?>

</label>

<label>

<input name="background-position-x" type="radio" value="center"<?php checked('center', get_theme_mod('background_position_x', 'left')); ?> />

<?php _e('Center') ?>

</label>

<label>

<input name="background-position-x" type="radio" value="right"<?php checked('right', get_theme_mod('background_position_x', 'left')); ?> />

<?php _e('Right') ?>

</label>

</fieldset></td>

</tr>

<tr valign="top">

<th scope="row"><?php _e( 'Repeat' ); ?></th>

<td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Repeat' ); ?></span></legend>

<label><input type="radio" name="background-repeat" value="no-repeat"<?php checked('no-repeat', get_theme_mod('background_repeat', 'repeat')); ?> /> <?php _e('No Repeat'); ?></label>

	<label><input type="radio" name="background-repeat" value="repeat"<?php checked('repeat', get_theme_mod('background_repeat', 'repeat')); ?> /> <?php _e('Tile'); ?></label>

	<label><input type="radio" name="background-repeat" value="repeat-x"<?php checked('repeat-x', get_theme_mod('background_repeat', 'repeat')); ?> /> <?php _e('Tile Horizontally'); ?></label>

	<label><input type="radio" name="background-repeat" value="repeat-y"<?php checked('repeat-y', get_theme_mod('background_repeat', 'repeat')); ?> /> <?php _e('Tile Vertically'); ?></label>

</fieldset></td>

</tr>

<tr valign="top">

<th scope="row"><?php _e( 'Attachment' ); ?></th>

<td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Attachment' ); ?></span></legend>

<label>

<input name="background-attachment" type="radio" value="scroll" <?php checked('scroll', get_theme_mod('background_attachment', 'scroll')); ?> />

<?php _e('Scroll') ?>

</label>

<label>

<input name="background-attachment" type="radio" value="fixed" <?php checked('fixed', get_theme_mod('background_attachment', 'scroll')); ?> />

<?php _e('Fixed') ?>

</label>

</fieldset></td>

</tr>

<?php endif; // get_background_image() ?>

<tr valign="top">

<th scope="row"><?php _e( 'Background Color' ); ?></th>

<td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Color' ); ?></span></legend>

</fieldset></td>

</tr>

</tbody>

</table>

<?php wp_nonce_field('custom-background'); ?>

<?php submit_button( null, 'primary', 'save-background-options' ); ?>

</form>

</div>

<?php

	}

	/**

	 * Handle an Image upload for the background image.

	 *

	 * @since 3.0.0

	 */

	function handle_upload() {

		if ( empty($_FILES) )

			return;

		check_admin_referer('custom-background-upload', '_wpnonce-custom-background-upload');

		$overrides = array('test_form' => false);

		if ( isset($file['error']) )

			wp_die( $file['error'] );

		$url = $file['url'];

		$type = $file['type'];

		$file = $file['file'];

		$filename = basename($file);

		// Construct the object array

		$object = array(

			'post_title' => $filename,

			'post_content' => $url,

			'post_mime_type' => $type,

			'guid' => $url,

			'context' => 'custom-background'

		);

		// Save the data

		$id = wp_insert_attachment($object, $file);

		// Add the meta-data

		wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );

		update_post_meta( $id, '_wp_attachment_is_custom_background', get_option('stylesheet' ) );

		set_theme_mod('background_image', esc_url_raw($url));

		$thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' );

		set_theme_mod('background_image_thumb', esc_url_raw( $thumbnail[0] ) );

		do_action('wp_create_file_in_uploads', $file, $id); // For replication

		$this->updated = true;

	}

	/**

	 *

	 * @since 3.4.0

	 */

		return $form_fields;

	}

	/**

	 *

	 * @since 3.4.0

	 */

	}

	public function wp_set_background_image() {

		if ( ! current_user_can('edit_theme_options') || ! isset( $_POST['attachment_id'] ) ) exit;

		$attachment_id = absint($_POST['attachment_id']);