%PDF-
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Mini Shell
Mini Shell
<?php
/**
* The custom background script.
*
* @package WordPress
* @subpackage Administration
*/
/**
* The custom background class.
*
* @since 3.0.0
*/
#[AllowDynamicProperties]
class Custom_Background {
/**
* Callback for administration header.
*
* @since 3.0.0
* @var callable
*/
public $admin_header_callback;
/**
* Callback for header div.
*
* @since 3.0.0
* @var callable
*/
public $admin_image_div_callback;
/**
* Used to trigger a success message when settings updated and set to true.
*
* @since 3.0.0
* @var bool
*/
private $updated;
/**
* Constructor - Registers administration header callback.
*
* @since 3.0.0
*
* @param callable $admin_header_callback Optional. Administration header callback.
* Default empty string.
* @param callable $admin_image_div_callback Optional. Custom image div output callback.
* Default empty string.
*/
public 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_custom-background-add', array( $this, 'ajax_background_add' ) );
// Unused since 3.5.0.
add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) );
}
/**
* Sets up the hooks for the Custom Background admin page.
*
* @since 3.0.0
*/
public function init() {
$page = add_theme_page(
_x( 'Background', 'custom background' ),
_x( 'Background', 'custom background' ),
'edit_theme_options',
'custom-background',
array( $this, 'admin_page' )
);
if ( ! $page ) {
return;
}
add_action( "load-{$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 );
}
}
/**
* Sets up the enqueue for the CSS & JavaScript files.
*
* @since 3.0.0
*/
public 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’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 “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>' .
'<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>' .
'<p>' . __( 'Do not 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="https://codex.wordpress.org/Appearance_Background_Screen">Documentation on Custom Background</a>' ) . '</p>' .
'<p>' . __( '<a href="https://wordpress.org/support/forums/">Support forums</a>' ) . '</p>'
);
wp_enqueue_media();
wp_enqueue_script( 'custom-background' );
wp_enqueue_style( 'wp-color-picker' );
}
/**
* Executes custom background modification.
*
* @since 3.0.0
*/
public 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-preset'] ) ) {
check_admin_referer( 'custom-background' );
if ( in_array( $_POST['background-preset'], array( 'default', 'fill', 'fit', 'repeat', 'custom' ), true ) ) {
$preset = $_POST['background-preset'];
} else {
$preset = 'default';
}
set_theme_mod( 'background_preset', $preset );
}
if ( isset( $_POST['background-position'] ) ) {
check_admin_referer( 'custom-background' );
$position = explode( ' ', $_POST['background-position'] );
if ( in_array( $position[0], array( 'left', 'center', 'right' ), true ) ) {
$position_x = $position[0];
} else {
$position_x = 'left';
}
if ( in_array( $position[1], array( 'top', 'center', 'bottom' ), true ) ) {
$position_y = $position[1];
} else {
$position_y = 'top';
}
set_theme_mod( 'background_position_x', $position_x );
set_theme_mod( 'background_position_y', $position_y );
}
if ( isset( $_POST['background-size'] ) ) {
check_admin_referer( 'custom-background' );
if ( in_array( $_POST['background-size'], array( 'auto', 'contain', 'cover' ), true ) ) {
$size = $_POST['background-size'];
} else {
$size = 'auto';
}
set_theme_mod( 'background_size', $size );
}
if ( isset( $_POST['background-repeat'] ) ) {
check_admin_referer( 'custom-background' );
$repeat = $_POST['background-repeat'];
if ( 'no-repeat' !== $repeat ) {
$repeat = 'repeat';
}
set_theme_mod( 'background_repeat', $repeat );
}
if ( isset( $_POST['background-attachment'] ) ) {
check_admin_referer( 'custom-background' );
$attachment = $_POST['background-attachment'];
if ( 'fixed' !== $attachment ) {
$attachment = 'scroll';
}
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;
}
/**
* Displays the custom background page.
*
* @since 3.0.0
*/
public function admin_page() {
?>
<div class="wrap" id="custom-background">
<h1><?php _e( 'Custom Background' ); ?></h1>
<?php
if ( current_user_can( 'customize' ) ) {
$message = sprintf(
/* translators: %s: URL to background image configuration in Customizer. */
__( 'You can now manage and live-preview Custom Backgrounds in the <a href="%s">Customizer</a>.' ),
admin_url( 'customize.php?autofocus[control]=background_image' )
);
wp_admin_notice(
$message,
array(
'type' => 'info',
'additional_classes' => array( 'hide-if-no-customize' ),
)
);
}
if ( ! empty( $this->updated ) ) {
$updated_message = sprintf(
/* translators: %s: Home URL. */
__( 'Background updated. <a href="%s">Visit your site</a> to see how it looks.' ),
esc_url( home_url( '/' ) )
);
wp_admin_notice(
$updated_message,
array(
'id' => 'message',
'additional_classes' => array( 'updated' ),
)
);
}
?>
<h2><?php _e( 'Background Image' ); ?></h2>
<table class="form-table" role="presentation">
<tbody>
<tr>
<th scope="row"><?php _e( 'Preview' ); ?></th>
<td>
<?php
if ( $this->admin_image_div_callback ) {
call_user_func( $this->admin_image_div_callback );
} else {
$background_styles = '';
$bgcolor = get_background_color();
if ( $bgcolor ) {
$background_styles .= 'background-color: ' . maybe_hash_hex_color( $bgcolor ) . ';';
}
$background_image_thumb = get_background_image();
if ( $background_image_thumb ) {
$background_image_thumb = esc_url( set_url_scheme( get_theme_mod( 'background_image_thumb', str_replace( '%', '%%', $background_image_thumb ) ) ) );
$background_position_x = get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) );
$background_position_y = get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) );
$background_size = get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) );
$background_repeat = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) );
$background_attachment = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) );
// Background-image URL must be single quote, see below.
$background_styles .= " background-image: url('$background_image_thumb');"
. " background-size: $background_size;"
. " background-position: $background_position_x $background_position_y;"
. " background-repeat: $background_repeat;"
. " background-attachment: $background_attachment;";
}
?>
<div id="custom-background-image" style="<?php echo $background_styles; ?>"><?php // Must be double quote, see above. ?>
<?php if ( $background_image_thumb ) { ?>
<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" /><br />
<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" />
<?php } ?>
</div>
<?php } ?>
</td>
</tr>
<?php if ( get_background_image() ) : ?>
<tr>
<th scope="row"><?php _e( 'Remove Image' ); ?></th>
<td>
<form method="post">
<?php wp_nonce_field( 'custom-background-remove', '_wpnonce-custom-background-remove' ); ?>
<?php submit_button( __( 'Remove Background Image' ), '', '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>
<th scope="row"><?php _e( 'Restore Original Image' ); ?></th>
<td>
<form method="post">
<?php wp_nonce_field( 'custom-background-reset', '_wpnonce-custom-background-reset' ); ?>
<?php submit_button( __( 'Restore Original Image' ), '', '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; ?>
<?php if ( current_user_can( 'upload_files' ) ) : ?>
<tr>
<th scope="row"><?php _e( 'Select Image' ); ?></th>
<td><form enctype="multipart/form-data" id="upload-form" class="wp-upload-form" method="post">
<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( _x( 'Upload', 'verb' ), '', 'submit', false ); ?>
</p>
<p>
<label for="choose-from-library-link"><?php _e( 'Or choose an image from your media library:' ); ?></label><br />
<button id="choose-from-library-link" class="button"
data-choose="<?php esc_attr_e( 'Choose a Background Image' ); ?>"
data-update="<?php esc_attr_e( 'Set as background' ); ?>"><?php _e( 'Choose Image' ); ?></button>
</p>
</form>
</td>
</tr>
<?php endif; ?>
</tbody>
</table>
<h2><?php _e( 'Display Options' ); ?></h2>
<form method="post">
<table class="form-table" role="presentation">
<tbody>
<?php if ( get_background_image() ) : ?>
<input name="background-preset" type="hidden" value="custom">
<?php
$background_position_title = __( 'Image Position' );
$background_position = sprintf(
'%s %s',
get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) ),
get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) )
);
$background_position_options = array(
array(
'left top' => array(
'label' => __( 'Top Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center top' => array(
'label' => __( 'Top' ),
'icon' => 'dashicons dashicons-arrow-up-alt',
),
'right top' => array(
'label' => __( 'Top Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
array(
'left center' => array(
'label' => __( 'Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center center' => array(
'label' => __( 'Center' ),
'icon' => 'background-position-center-icon',
),
'right center' => array(
'label' => __( 'Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
array(
'left bottom' => array(
'label' => __( 'Bottom Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center bottom' => array(
'label' => __( 'Bottom' ),
'icon' => 'dashicons dashicons-arrow-down-alt',
),
'right bottom' => array(
'label' => __( 'Bottom Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
);
?>
<tr>
<th scope="row"><?php echo $background_position_title; ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php echo $background_position_title; ?></span></legend>
<div class="background-position-control">
<?php foreach ( $background_position_options as $group ) : ?>
<div class="button-group">
<?php foreach ( $group as $value => $input ) : ?>
<label>
<input class="ui-helper-hidden-accessible" name="background-position" type="radio" value="<?php echo esc_attr( $value ); ?>"<?php checked( $value, $background_position ); ?>>
<span class="button display-options position"><span class="<?php echo esc_attr( $input['icon'] ); ?>" aria-hidden="true"></span></span>
<span class="screen-reader-text"><?php echo $input['label']; ?></span>
</label>
<?php endforeach; ?>
</div>
<?php endforeach; ?>
</div>
</fieldset></td>
</tr>
<?php $image_size_title = __( 'Image Size' ); ?>
<tr>
<th scope="row"><label for="background-size"><?php echo $image_size_title; ?></label></th>
<td><fieldset><legend class="screen-reader-text"><span><?php echo $image_size_title; ?></span></legend>
<select id="background-size" name="background-size">
<option value="auto"<?php selected( 'auto', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _ex( 'Original', 'Original Size' ); ?></option>
<option value="contain"<?php selected( 'contain', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fit to Screen' ); ?></option>
<option value="cover"<?php selected( 'cover', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fill Screen' ); ?></option>
</select>
</fieldset></td>
</tr>
<?php $background_repeat_title = _x( 'Repeat', 'Background Repeat' ); ?>
<tr>
<th scope="row"><?php echo $background_repeat_title; ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php echo $background_repeat_title; ?></span></legend>
<input name="background-repeat" type="hidden" value="no-repeat">
<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>
</fieldset></td>
</tr>
<?php $background_scroll_title = _x( 'Scroll', 'Background Scroll' ); ?>
<tr>
<th scope="row"><?php echo $background_scroll_title; ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php echo $background_scroll_title; ?></span></legend>
<input name="background-attachment" type="hidden" value="fixed">
<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>
</fieldset></td>
</tr>
<?php endif; // get_background_image() ?>
<?php $background_color_title = __( 'Background Color' ); ?>
<tr>
<th scope="row"><?php echo $background_color_title; ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php echo $background_color_title; ?></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
}
/**
* Handles an Image upload for the background image.
*
* @since 3.0.0
*/
public function handle_upload() {
if ( empty( $_FILES ) ) {
return;
}
check_admin_referer( 'custom-background-upload', '_wpnonce-custom-background-upload' );
$overrides = array( 'test_form' => false );
$uploaded_file = $_FILES['import'];
$wp_filetype = wp_check_filetype_and_ext( $uploaded_file['tmp_name'], $uploaded_file['name'] );
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 = wp_basename( $file );
// Construct the attachment array.
$attachment = array(
'post_title' => $filename,
'post_content' => $url,
'post_mime_type' => $type,
'guid' => $url,
'context' => 'custom-background',
);
// Save the data.
$id = wp_insert_attachment( $attachment, $file );
// Add the metadata.
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', sanitize_url( $url ) );
$thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' );
set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );
/** This filter is documented in wp-admin/includes/class-custom-image-header.php */
$file = apply_filters( 'wp_create_file_in_uploads', $file, $id ); // For replication.
$this->updated = true;
}
/**
* Handles Ajax request for adding custom background context to an attachment.
*
* Triggers when the user adds a new background image from the
* Media Manager.
*
* @since 4.1.0
*/
public function ajax_background_add() {
check_ajax_referer( 'background-add', 'nonce' );
if ( ! current_user_can( 'edit_theme_options' ) ) {
wp_send_json_error();
}
$attachment_id = absint( $_POST['attachment_id'] );
if ( $attachment_id < 1 ) {
wp_send_json_error();
}
update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_stylesheet() );
wp_send_json_success();
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*
* @param array $form_fields
* @return array $form_fields
*/
public function attachment_fields_to_edit( $form_fields ) {
return $form_fields;
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*
* @param array $tabs
* @return array $tabs
*/
public function filter_upload_tabs( $tabs ) {
return $tabs;
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*/
public function wp_set_background_image() {
check_ajax_referer( 'custom-background' );
if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) {
exit;
}
$attachment_id = absint( $_POST['attachment_id'] );
$sizes = array_keys(
/** This filter is documented in wp-admin/includes/media.php */
apply_filters(
'image_size_names_choose',
array(
'thumbnail' => __( 'Thumbnail' ),
'medium' => __( 'Medium' ),
'large' => __( 'Large' ),
'full' => __( 'Full Size' ),
)
)
);
$size = 'thumbnail';
if ( in_array( $_POST['size'], $sizes, true ) ) {
$size = esc_attr( $_POST['size'] );
}
update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );
$url = wp_get_attachment_image_src( $attachment_id, $size );
$thumbnail = wp_get_attachment_image_src( $attachment_id, 'thumbnail' );
set_theme_mod( 'background_image', sanitize_url( $url[0] ) );
set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );
exit;
}
}
Zerion Mini Shell 1.0
在线中文学校 7/24，专为华裔青少儿设计，教学经验丰富|灵犀中文
跳至内容
班主任全程跟踪，及时给家长反馈孩子学习情况，全方位保障孩子学有所成。
灵活的上课时间 ( 7*24 )，随时随地在线学中文。
学生不仅可以和课件互动，还能加强和老师的互动。学生、教师和课件三位一体，互动性空前提升，让老师对学生的学习效果把控地更加准确，教学更有效。
通过非常丰富的互动体验和精美的趣味元素设计，让孩子更能记住所学的内容，真正做到寓教于乐，让学生能够快乐地学好中文。
灵犀中文的教研团队深耕行业多年，深谙华裔孩子中文学习的特点。课件专业针对华裔青少儿中文学习的特点制作，让孩子的学习更加科学。
覆盖多种中文考试课程，包括IB中文、AP中文、A-Level中文、O-Level中文和DSE中文，满足不同中文考试辅导的需求。
所有考试辅导皆为1对1名师教学，根据考生的水平制定个性化备考课程计划，针对弱项快速补强。
灵犀的老师有着丰富的考试辅导经验，深谙各中文考试的大纲和重点，帮助学生超越自我，考取高分。
灵犀中文掌握华裔青少儿中文教学的精髓，让您的孩子快乐高效地学好中文！
练习充分，讲练比例1:4，全面提升听说读写，让孩子真正学会中文
趣味课堂互动，锻炼孩子语言交际能力，激发孩子中文学习兴趣
