<?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

	 */

	/**

	 * Callback for header div.

	 *

	 * @var callback

	 * @since 3.0.0

	 */

	/**

	 */

	/**

	 * 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.

	 */

		$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

	 */

			return;

	}

	/**

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

	 *

	 * @since 3.0.0

	 */

		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>' . __( 'To use a background image, simply upload it or choose an image that has already been uploaded to your Media Library by clicking the &#8220;Choose Image&#8221; 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>' .

				'<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. &#8220;#ff0000&#8221; for red, or by choosing a color using the color picker.' ) . '</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>' .

		);

		wp_enqueue_media();

		wp_enqueue_script('custom-background');

		wp_enqueue_style('wp-color-picker');

	}

	/**

	 * Execute custom background modification.

	 *

	 * @since 3.0.0

	 */

		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

	 */

?>

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

<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>

<table class="form-table">

<tbody>

<td>

</td>

</tr>

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

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

<td>

<?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 ) : ?>

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

<td>

<?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>

<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 />

			data-choose="<?php esc_attr_e( 'Choose a Background Image' ); ?>"

	</p>

	</form>

</td>

</tr>

</tbody>

</table>

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

<table class="form-table">

<tbody>

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

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

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

<label>

<?php _e('Left') ?>

</label>

<label>

<?php _e('Center') ?>

</label>

<label>

<?php _e('Right') ?>

</label>

</fieldset></td>

</tr>

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

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

</fieldset></td>

</tr>

<th scope="row"><?php _ex( 'Attachment', 'Background Attachment' ); ?></th>

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

<label>

</label>

<label>

</label>

</fieldset></td>

</tr>

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

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

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

<?php

$default_color = '';

if ( current_theme_supports( 'custom-background', 'default-color' ) )

	$default_color = ' data-default-color="#' . esc_attr( get_theme_support( 'custom-background', 'default-color' ) ) . '"';

?>

<input type="text" name="background-color" id="background-color" value="#<?php echo esc_attr( get_background_color() ); ?>"<?php echo $default_color ?> />

</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

	 */

		if ( empty($_FILES) )

			return;

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

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

		$uploaded_file = $_FILES['import'];

		if ( ! wp_match_mime_types( 'image', $wp_filetype['type'] ) )

			wp_die( __( 'The uploaded file is not a valid image. Please try again.' ) );

		$file = wp_handle_upload($uploaded_file, $overrides);

		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] ) );