( $_wp_admin_css_colors ) ) { $_wp_admin_css_colors = array(); } $_wp_admin_css_colors[ $key ] = (object) array( 'name' => $name, 'url' => $url, 'colors' => $colors, 'icon_colors' => $icons, ); } /** * Registers the default admin color schemes. * * Registers the initial set of eight color schemes in the Profile section * of the dashboard which allows for styling the admin menu and toolbar. * * @see wp_admin_css_color() * * @since 3.0.0 */ function register_admin_color_schemes() { $suffix = is_rtl() ? '-rtl' : ''; $suffix .= SCRIPT_DEBUG ? '' : '.min'; wp_admin_css_color( 'fresh', _x( 'Default', 'admin color scheme' ), false, array( '#1d2327', '#2c3338', '#2271b1', '#72aee6' ), array( 'base' => '#a7aaad', 'focus' => '#72aee6', 'current' => '#fff', ) ); wp_admin_css_color( 'light', _x( 'Light', 'admin color scheme' ), admin_url( "css/colors/light/colors$suffix.css" ), array( '#e5e5e5', '#999', '#d64e07', '#04a4cc' ), array( 'base' => '#999', 'focus' => '#ccc', 'current' => '#ccc', ) ); wp_admin_css_color( 'modern', _x( 'Modern', 'admin color scheme' ), admin_url( "css/colors/modern/colors$suffix.css" ), array( '#1e1e1e', '#3858e9', '#33f078' ), array( 'base' => '#f3f1f1', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'blue', _x( 'Blue', 'admin color scheme' ), admin_url( "css/colors/blue/colors$suffix.css" ), array( '#096484', '#4796b3', '#52accc', '#74B6CE' ), array( 'base' => '#e5f8ff', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'midnight', _x( 'Midnight', 'admin color scheme' ), admin_url( "css/colors/midnight/colors$suffix.css" ), array( '#25282b', '#363b3f', '#69a8bb', '#e14d43' ), array( 'base' => '#f1f2f3', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'sunrise', _x( 'Sunrise', 'admin color scheme' ), admin_url( "css/colors/sunrise/colors$suffix.css" ), array( '#b43c38', '#cf4944', '#dd823b', '#ccaf0b' ), array( 'base' => '#f3f1f1', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'ectoplasm', _x( 'Ectoplasm', 'admin color scheme' ), admin_url( "css/colors/ectoplasm/colors$suffix.css" ), array( '#413256', '#523f6d', '#a3b745', '#d46f15' ), array( 'base' => '#ece6f6', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'ocean', _x( 'Ocean', 'admin color scheme' ), admin_url( "css/colors/ocean/colors$suffix.css" ), array( '#627c83', '#738e96', '#9ebaa0', '#aa9d88' ), array( 'base' => '#f2fcff', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'coffee', _x( 'Coffee', 'admin color scheme' ), admin_url( "css/colors/coffee/colors$suffix.css" ), array( '#46403c', '#59524c', '#c7a589', '#9ea476' ), array( 'base' => '#f3f2f1', 'focus' => '#fff', 'current' => '#fff', ) ); } /** * Displays the URL of a WordPress admin CSS file. * * @see WP_Styles::_css_href() and its {@see 'style_loader_src'} filter. * * @since 2.3.0 * * @param string $file file relative to wp-admin/ without its ".css" extension. * @return string */ function wp_admin_css_uri( $file = 'wp-admin' ) { if ( defined( 'WP_INSTALLING' ) ) { $_file = "./$file.css"; } else { $_file = admin_url( "$file.css" ); } $_file = add_query_arg( 'version', get_bloginfo( 'version' ), $_file ); /** * Filters the URI of a WordPress admin CSS file. * * @since 2.3.0 * * @param string $_file Relative path to the file with query arguments attached. * @param string $file Relative path to the file, minus its ".css" extension. */ return apply_filters( 'wp_admin_css_uri', $_file, $file ); } /** * Enqueues or directly prints a stylesheet link to the specified CSS file. * * "Intelligently" decides to enqueue or to print the CSS file. If the * {@see 'wp_print_styles'} action has *not* yet been called, the CSS file will be * enqueued. If the {@see 'wp_print_styles'} action has been called, the CSS link will * be printed. Printing may be forced by passing true as the $force_echo * (second) parameter. * * For backward compatibility with WordPress 2.3 calling method: If the $file * (first) parameter does not correspond to a registered CSS file, we assume * $file is a file relative to wp-admin/ without its ".css" extension. A * stylesheet link to that generated URL is printed. * * @since 2.3.0 * * @param string $file Optional. Style handle name or file name (without ".css" extension) relative * to wp-admin/. Defaults to 'wp-admin'. * @param bool $force_echo Optional. Force the stylesheet link to be printed rather than enqueued. */ function wp_admin_css( $file = 'wp-admin', $force_echo = false ) { // For backward compatibility. $handle = str_starts_with( $file, 'css/' ) ? substr( $file, 4 ) : $file; if ( wp_styles()->query( $handle ) ) { if ( $force_echo || did_action( 'wp_print_styles' ) ) { // We already printed the style queue. Print this one immediately. wp_print_styles( $handle ); } else { // Add to style queue. wp_enqueue_style( $handle ); } return; } $stylesheet_link = sprintf( "\n", esc_url( wp_admin_css_uri( $file ) ) ); /** * Filters the stylesheet link to the specified CSS file. * * If the site is set to display right-to-left, the RTL stylesheet link * will be used instead. * * @since 2.3.0 * @param string $stylesheet_link HTML link element for the stylesheet. * @param string $file Style handle name or filename (without ".css" extension) * relative to wp-admin/. Defaults to 'wp-admin'. */ echo apply_filters( 'wp_admin_css', $stylesheet_link, $file ); if ( function_exists( 'is_rtl' ) && is_rtl() ) { $rtl_stylesheet_link = sprintf( "\n", esc_url( wp_admin_css_uri( "$file-rtl" ) ) ); /** This filter is documented in wp-includes/general-template.php */ echo apply_filters( 'wp_admin_css', $rtl_stylesheet_link, "$file-rtl" ); } } /** * Enqueues the default ThickBox js and css. * * If any of the settings need to be changed, this can be done with another js * file similar to media-upload.js. That file should * require array('thickbox') to ensure it is loaded after. * * @since 2.5.0 */ function add_thickbox() { wp_enqueue_script( 'thickbox' ); wp_enqueue_style( 'thickbox' ); if ( is_network_admin() ) { add_action( 'admin_head', '_thickbox_path_admin_subfolder' ); } } /** * Displays the XHTML generator that is generated on the wp_head hook. * * See {@see 'wp_head'}. * * @since 2.5.0 */ function wp_generator() { /** * Filters the output of the XHTML generator tag. * * @since 2.5.0 * * @param string $generator_type The XHTML generator. */ the_generator( apply_filters( 'wp_generator_type', 'xhtml' ) ); } /** * Displays the generator XML or Comment for RSS, ATOM, etc. * * Returns the correct generator type for the requested output format. Allows * for a plugin to filter generators overall the {@see 'the_generator'} filter. * * @since 2.5.0 * * @param string $type The type of generator to output - (html|xhtml|atom|rss2|rdf|comment|export). */ function the_generator( $type ) { /** * Filters the output of the XHTML generator tag for display. * * @since 2.5.0 * * @param string $generator_type The generator output. * @param string $type The type of generator to output. Accepts 'html', * 'xhtml', 'atom', 'rss2', 'rdf', 'comment', 'export'. */ echo apply_filters( 'the_generator', get_the_generator( $type ), $type ) . "\n"; } /** * Creates the generator XML or Comment for RSS, ATOM, etc. * * Returns the correct generator type for the requested output format. Allows * for a plugin to filter generators on an individual basis using the * {@see 'get_the_generator_$type'} filter. * * @since 2.5.0 * * @param string $type The type of generator to return - (html|xhtml|atom|rss2|rdf|comment|export). * @return string|void The HTML content for the generator. */ function get_the_generator( $type = '' ) { if ( empty( $type ) ) { $current_filter = current_filter(); if ( empty( $current_filter ) ) { return; } switch ( $current_filter ) { case 'rss2_head': case 'commentsrss2_head': $type = 'rss2'; break; case 'rss_head': case 'opml_head': $type = 'comment'; break; case 'rdf_header': $type = 'rdf'; break; case 'atom_head': case 'comments_atom_head': case 'app_head': $type = 'atom'; break; } } switch ( $type ) { case 'html': $gen = ''; break; case 'xhtml': $gen = ''; break; case 'atom': $gen = 'WordPress'; break; case 'rss2': $gen = '' . sanitize_url( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . ''; break; case 'rdf': $gen = ''; break; case 'comment': $gen = ''; break; case 'export': $gen = ''; break; } /** * Filters the HTML for the retrieved generator type. * * The dynamic portion of the hook name, `$type`, refers to the generator type. * * Possible hook names include: * * - `get_the_generator_atom` * - `get_the_generator_comment` * - `get_the_generator_export` * - `get_the_generator_html` * - `get_the_generator_rdf` * - `get_the_generator_rss2` * - `get_the_generator_xhtml` * * @since 2.5.0 * * @param string $gen The HTML markup output to wp_head(). * @param string $type The type of generator. Accepts 'html', 'xhtml', 'atom', * 'rss2', 'rdf', 'comment', 'export'. */ return apply_filters( "get_the_generator_{$type}", $gen, $type ); } /** * Outputs the HTML checked attribute. * * Compares the first two arguments and if identical marks as checked. * * @since 1.0.0 * * @param mixed $checked One of the values to compare. * @param mixed $current Optional. The other value to compare if not just true. * Default true. * @param bool $display Optional. Whether to echo or just return the string. * Default true. * @return string HTML attribute or empty string. */ function checked( $checked, $current = true, $display = true ) { return __checked_selected_helper( $checked, $current, $display, 'checked' ); } /** * Outputs the HTML selected attribute. * * Compares the first two arguments and if identical marks as selected. * * @since 1.0.0 * * @param mixed $selected One of the values to compare. * @param mixed $current Optional. The other value to compare if not just true. * Default true. * @param bool $display Optional. Whether to echo or just return the string. * Default true. * @return string HTML attribute or empty string. */ function selected( $selected, $current = true, $display = true ) { return __checked_selected_helper( $selected, $current, $display, 'selected' ); } /** * Outputs the HTML disabled attribute. * * Compares the first two arguments and if identical marks as disabled. * * @since 3.0.0 * * @param mixed $disabled One of the values to compare. * @param mixed $current Optional. The other value to compare if not just true. * Default true. * @param bool $display Optional. Whether to echo or just return the string. * Default true. * @return string HTML attribute or empty string. */ function disabled( $disabled, $current = true, $display = true ) { return __checked_selected_helper( $disabled, $current, $display, 'disabled' ); } /** * Outputs the HTML readonly attribute. * * Compares the first two arguments and if identical marks as readonly. * * @since 5.9.0 * * @param mixed $readonly_value One of the values to compare. * @param mixed $current Optional. The other value to compare if not just true. * Default true. * @param bool $display Optional. Whether to echo or just return the string. * Default true. * @return string HTML attribute or empty string. */ function wp_readonly( $readonly_value, $current = true, $display = true ) { return __checked_selected_helper( $readonly_value, $current, $display, 'readonly' ); } /* * Include a compat `readonly()` function on PHP < 8.1. Since PHP 8.1, * `readonly` is a reserved keyword and cannot be used as a function name. * In order to avoid PHP parser errors, this function was extracted * to a separate file and is only included conditionally on PHP < 8.1. */ if ( PHP_VERSION_ID < 80100 ) { require_once __DIR__ . '/php-compat/readonly.php'; } /** * Private helper function for checked, selected, disabled and readonly. * * Compares the first two arguments and if identical marks as `$type`. * * @since 2.8.0 * @access private * * @param mixed $helper One of the values to compare. * @param mixed $current The other value to compare if not just true. * @param bool $display Whether to echo or just return the string. * @param string $type The type of checked|selected|disabled|readonly we are doing. * @return string HTML attribute or empty string. */ function __checked_selected_helper( $helper, $current, $display, $type ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore if ( (string) $helper === (string) $current ) { $result = " $type='$type'"; } else { $result = ''; } if ( $display ) { echo $result; } return $result; } /** * Assigns a visual indicator for required form fields. * * @since 6.1.0 * * @return string Indicator glyph wrapped in a `span` tag. */ function wp_required_field_indicator() { /* translators: Character to identify required form fields. */ $glyph = __( '*' ); $indicator = '' . esc_html( $glyph ) . ''; /** * Filters the markup for a visual indicator of required form fields. * * @since 6.1.0 * * @param string $indicator Markup for the indicator element. */ return apply_filters( 'wp_required_field_indicator', $indicator ); } /** * Creates a message to explain required form fields. * * @since 6.1.0 * * @return string Message text and glyph wrapped in a `span` tag. */ function wp_required_field_message() { $message = sprintf( '%s', /* translators: %s: Asterisk symbol (*). */ sprintf( __( 'Required fields are marked %s' ), wp_required_field_indicator() ) ); /** * Filters the message to explain required form fields. * * @since 6.1.0 * * @param string $message Message text and glyph wrapped in a `span` tag. */ return apply_filters( 'wp_required_field_message', $message ); } /** * Default settings for heartbeat. * * Outputs the nonce used in the heartbeat XHR. * * @since 3.6.0 * * @param array $settings * @return array Heartbeat settings. */ function wp_heartbeat_settings( $settings ) { if ( ! is_admin() ) { $settings['ajaxurl'] = admin_url( 'admin-ajax.php', 'relative' ); } if ( is_user_logged_in() ) { $settings['nonce'] = wp_create_nonce( 'heartbeat-nonce' ); } return $settings; } ks whose targets are overwritten. * * @param int $shift_this_point Accumulate and return shift for this position. * @return int How many bytes the given pointer moved in response to the updates. */ private function apply_attributes_updates( $shift_this_point = 0 ) { if ( ! count( $this->lexical_updates ) ) { return 0; } $accumulated_shift_for_given_point = 0; /* * Attribute updates can be enqueued in any order but updates * to the document must occur in lexical order; that is, each * replacement must be made before all others which follow it * at later string indices in the input document. * * Sorting avoid making out-of-order replacements which * can lead to mangled output, partially-duplicated * attributes, and overwritten attributes. */ usort( $this->lexical_updates, array( self::class, 'sort_start_ascending' ) ); $bytes_already_copied = 0; $output_buffer = ''; foreach ( $this->lexical_updates as $diff ) { $shift = strlen( $diff->text ) - ( $diff->end - $diff->start ); // Adjust the cursor position by however much an update affects it. if ( $diff->start <= $this->bytes_already_parsed ) { $this->bytes_already_parsed += $shift; } // Accumulate shift of the given pointer within this function call. if ( $diff->start <= $shift_this_point ) { $accumulated_shift_for_given_point += $shift; } $output_buffer .= substr( $this->html, $bytes_already_copied, $diff->start - $bytes_already_copied ); $output_buffer .= $diff->text; $bytes_already_copied = $diff->end; } $this->html = $output_buffer . substr( $this->html, $bytes_already_copied ); /* * Adjust bookmark locations to account for how the text * replacements adjust offsets in the input document. */ foreach ( $this->bookmarks as $bookmark_name => $bookmark ) { /* * Each lexical update which appears before the bookmark's endpoints * might shift the offsets for those endpoints. Loop through each change * and accumulate the total shift for each bookmark, then apply that * shift after tallying the full delta. */ $head_delta = 0; $tail_delta = 0; foreach ( $this->lexical_updates as $diff ) { if ( $bookmark->start < $diff->start && $bookmark->end < $diff->start ) { break; } if ( $bookmark->start >= $diff->start && $bookmark->end < $diff->end ) { $this->release_bookmark( $bookmark_name ); continue 2; } $delta = strlen( $diff->text ) - ( $diff->end - $diff->start ); if ( $bookmark->start >= $diff->start ) { $head_delta += $delta; } if ( $bookmark->end >= $diff->end ) { $tail_delta += $delta; } } $bookmark->start += $head_delta; $bookmark->end += $tail_delta; } $this->lexical_updates = array(); return $accumulated_shift_for_given_point; } /** * Checks whether a bookmark with the given name exists. * * @since 6.3.0 * * @param string $bookmark_name Name to identify a bookmark that potentially exists. * @return bool Whether that bookmark exists. */ public function has_bookmark( $bookmark_name ) { return array_key_exists( $bookmark_name, $this->bookmarks ); } /** * Move the internal cursor in the Tag Processor to a given bookmark's location. * * In order to prevent accidental infinite loops, there's a * maximum limit on the number of times seek() can be called. * * @since 6.2.0 * * @param string $bookmark_name Jump to the place in the document identified by this bookmark name. * @return bool Whether the internal cursor was successfully moved to the bookmark's location. */ public function seek( $bookmark_name ) { if ( ! array_key_exists( $bookmark_name, $this->bookmarks ) ) { _doing_it_wrong( __METHOD__, __( 'Unknown bookmark name.' ), '6.2.0' ); return false; } if ( ++$this->seek_count > self::MAX_SEEK_OPS ) { _doing_it_wrong( __METHOD__, __( 'Too many calls to seek() - this can lead to performance issues.' ), '6.2.0' ); return false; } // Flush out any pending updates to the document. $this->get_updated_html(); // Point this tag processor before the sought tag opener and consume it. $this->bytes_already_parsed = $this->bookmarks[ $bookmark_name ]->start; return $this->next_tag( array( 'tag_closers' => 'visit' ) ); } /** * Compare two WP_HTML_Text_Replacement objects. * * @since 6.2.0 * * @param WP_HTML_Text_Replacement $a First attribute update. * @param WP_HTML_Text_Replacement $b Second attribute update. * @return int Comparison value for string order. */ private static function sort_start_ascending( $a, $b ) { $by_start = $a->start - $b->start; if ( 0 !== $by_start ) { return $by_start; } $by_text = isset( $a->text, $b->text ) ? strcmp( $a->text, $b->text ) : 0; if ( 0 !== $by_text ) { return $by_text; } /* * This code should be unreachable, because it implies the two replacements * start at the same location and contain the same text. */ return $a->end - $b->end; } /** * Return the enqueued value for a given attribute, if one exists. * * Enqueued updates can take different data types: * - If an update is enqueued and is boolean, the return will be `true` * - If an update is otherwise enqueued, the return will be the string value of that update. * - If an attribute is enqueued to be removed, the return will be `null` to indicate that. * - If no updates are enqueued, the return will be `false` to differentiate from "removed." * * @since 6.2.0 * * @param string $comparable_name The attribute name in its comparable form. * @return string|boolean|null Value of enqueued update if present, otherwise false. */ private function get_enqueued_attribute_value( $comparable_name ) { if ( ! isset( $this->lexical_updates[ $comparable_name ] ) ) { return false; } $enqueued_text = $this->lexical_updates[ $comparable_name ]->text; // Removed attributes erase the entire span. if ( '' === $enqueued_text ) { return null; } /* * Boolean attribute updates are just the attribute name without a corresponding value. * * This value might differ from the given comparable name in that there could be leading * or trailing whitespace, and that the casing follows the name given in `set_attribute`. * * Example: * * $p->set_attribute( 'data-TEST-id', 'update' ); * 'update' === $p->get_enqueued_attribute_value( 'data-test-id' ); * * Detect this difference based on the absence of the `=`, which _must_ exist in any * attribute containing a value, e.g. ``. * ¹ ² * 1. Attribute with a string value. * 2. Boolean attribute whose value is `true`. */ $equals_at = strpos( $enqueued_text, '=' ); if ( false === $equals_at ) { return true; } /* * Finally, a normal update's value will appear after the `=` and * be double-quoted, as performed incidentally by `set_attribute`. * * e.g. `type="text"` * ¹² ³ * 1. Equals is here. * 2. Double-quoting starts one after the equals sign. * 3. Double-quoting ends at the last character in the update. */ $enqueued_value = substr( $enqueued_text, $equals_at + 2, -1 ); return html_entity_decode( $enqueued_value ); } /** * Returns the value of a requested attribute from a matched tag opener if that attribute exists. * * Example: * * $p = new WP_HTML_Tag_Processor( '
Test
' ); * $p->next_tag( array( 'class_name' => 'test' ) ) === true; * $p->get_attribute( 'data-test-id' ) === '14'; * $p->get_attribute( 'enabled' ) === true; * $p->get_attribute( 'aria-label' ) === null; * * $p->next_tag() === false; * $p->get_attribute( 'class' ) === null; * * @since 6.2.0 * * @param string $name Name of attribute whose value is requested. * @return string|true|null Value of attribute or `null` if not available. Boolean attributes return `true`. */ public function get_attribute( $name ) { if ( null === $this->tag_name_starts_at ) { return null; } $comparable = strtolower( $name ); /* * For every attribute other than `class` it's possible to perform a quick check if * there's an enqueued lexical update whose value takes priority over what's found in * the input document. * * The `class` attribute is special though because of the exposed helpers `add_class` * and `remove_class`. These form a builder for the `class` attribute, so an additional * check for enqueued class changes is required in addition to the check for any enqueued * attribute values. If any exist, those enqueued class changes must first be flushed out * into an attribute value update. */ if ( 'class' === $name ) { $this->class_name_updates_to_attributes_updates(); } // Return any enqueued attribute value updates if they exist. $enqueued_value = $this->get_enqueued_attribute_value( $comparable ); if ( false !== $enqueued_value ) { return $enqueued_value; } if ( ! isset( $this->attributes[ $comparable ] ) ) { return null; } $attribute = $this->attributes[ $comparable ]; /* * This flag distinguishes an attribute with no value * from an attribute with an empty string value. For * unquoted attributes this could look very similar. * It refers to whether an `=` follows the name. * * e.g.
* ¹ ² * 1. Attribute `boolean-attribute` is `true`. * 2. Attribute `empty-attribute` is `""`. */ if ( true === $attribute->is_true ) { return true; } $raw_value = substr( $this->html, $attribute->value_starts_at, $attribute->value_length ); return html_entity_decode( $raw_value ); } /** * Gets lowercase names of all attributes matching a given prefix in the current tag. * * Note that matching is case-insensitive. This is in accordance with the spec: * * > There must never be two or more attributes on * > the same start tag whose names are an ASCII * > case-insensitive match for each other. * - HTML 5 spec * * Example: * * $p = new WP_HTML_Tag_Processor( '
Test
' ); * $p->next_tag( array( 'class_name' => 'test' ) ) === true; * $p->get_attribute_names_with_prefix( 'data-' ) === array( 'data-enabled', 'data-test-id' ); * * $p->next_tag() === false; * $p->get_attribute_names_with_prefix( 'data-' ) === null; * * @since 6.2.0 * * @see https://html.spec.whatwg.org/multipage/syntax.html#attributes-2:ascii-case-insensitive * * @param string $prefix Prefix of requested attribute names. * @return array|null List of attribute names, or `null` when no tag opener is matched. */ function get_attribute_names_with_prefix( $prefix ) { if ( $this->is_closing_tag || null === $this->tag_name_starts_at ) { return null; } $comparable = strtolower( $prefix ); $matches = array(); foreach ( array_keys( $this->attributes ) as $attr_name ) { if ( str_starts_with( $attr_name, $comparable ) ) { $matches[] = $attr_name; } } return $matches; } /** * Returns the uppercase name of the matched tag. * * Example: * * $p = new WP_HTML_Tag_Processor( '
Test
' ); * $p->next_tag() === true; * $p->get_tag() === 'DIV'; * * $p->next_tag() === false; * $p->get_tag() === null; * * @since 6.2.0 * * @return string|null Name of currently matched tag in input HTML, or `null` if none found. */ public function get_tag() { if ( null === $this->tag_name_starts_at ) { return null; } $tag_name = substr( $this->html, $this->tag_name_starts_at, $this->tag_name_length ); return strtoupper( $tag_name ); } /** * Indicates if the currently matched tag contains the self-closing flag. * * No HTML elements ought to have the self-closing flag and for those, the self-closing * flag will be ignored. For void elements this is benign because they "self close" * automatically. For non-void HTML elements though problems will appear if someone * intends to use a self-closing element in place of that element with an empty body. * For HTML foreign elements and custom elements the self-closing flag determines if * they self-close or not. * * This function does not determine if a tag is self-closing, * but only if the self-closing flag is present in the syntax. * * @since 6.3.0 * * @return bool Whether the currently matched tag contains the self-closing flag. */ public function has_self_closing_flag() { if ( ! $this->tag_name_starts_at ) { return false; } return '/' === $this->html[ $this->tag_ends_at - 1 ]; } /** * Indicates if the current tag token is a tag closer. * * Example: * * $p = new WP_HTML_Tag_Processor( '
' ); * $p->next_tag( array( 'tag_name' => 'div', 'tag_closers' => 'visit' ) ); * $p->is_tag_closer() === false; * * $p->next_tag( array( 'tag_name' => 'div', 'tag_closers' => 'visit' ) ); * $p->is_tag_closer() === true; * * @since 6.2.0 * * @return bool Whether the current tag is a tag closer. */ public function is_tag_closer() { return $this->is_closing_tag; } /** * Updates or creates a new attribute on the currently matched tag with the passed value. * * For boolean attributes special handling is provided: * - When `true` is passed as the value, then only the attribute name is added to the tag. * - When `false` is passed, the attribute gets removed if it existed before. * * For string attributes, the value is escaped using the `esc_attr` function. * * @since 6.2.0 * @since 6.2.1 Fix: Only create a single update for multiple calls with case-variant attribute names. * * @param string $name The attribute name to target. * @param string|bool $value The new attribute value. * @return bool Whether an attribute value was set. */ public function set_attribute( $name, $value ) { if ( $this->is_closing_tag || null === $this->tag_name_starts_at ) { return false; } /* * WordPress rejects more characters than are strictly forbidden * in HTML5. This is to prevent additional security risks deeper * in the WordPress and plugin stack. Specifically the * less-than (<) greater-than (>) and ampersand (&) aren't allowed. * * The use of a PCRE match enables looking for specific Unicode * code points without writing a UTF-8 decoder. Whereas scanning * for one-byte characters is trivial (with `strcspn`), scanning * for the longer byte sequences would be more complicated. Given * that this shouldn't be in the hot path for execution, it's a * reasonable compromise in efficiency without introducing a * noticeable impact on the overall system. * * @see https://html.spec.whatwg.org/#attributes-2 * * @TODO as the only regex pattern maybe we should take it out? are * Unicode patterns available broadly in Core? */ if ( preg_match( '~[' . // Syntax-like characters. '"\'>& The values "true" and "false" are not allowed on boolean attributes. * > To represent a false value, the attribute has to be omitted altogether. * - HTML5 spec, https://html.spec.whatwg.org/#boolean-attributes */ if ( false === $value ) { return $this->remove_attribute( $name ); } if ( true === $value ) { $updated_attribute = $name; } else { $escaped_new_value = esc_attr( $value ); $updated_attribute = "{$name}=\"{$escaped_new_value}\""; } /* * > There must never be two or more attributes on * > the same start tag whose names are an ASCII * > case-insensitive match for each other. * - HTML 5 spec * * @see https://html.spec.whatwg.org/multipage/syntax.html#attributes-2:ascii-case-insensitive */ $comparable_name = strtolower( $name ); if ( isset( $this->attributes[ $comparable_name ] ) ) { /* * Update an existing attribute. * * Example – set attribute id to "new" in
: * *
* ^-------------^ * start end * replacement: `id="new"` * * Result:
*/ $existing_attribute = $this->attributes[ $comparable_name ]; $this->lexical_updates[ $comparable_name ] = new WP_HTML_Text_Replacement( $existing_attribute->start, $existing_attribute->end, $updated_attribute ); } else { /* * Create a new attribute at the tag's name end. * * Example – add attribute id="new" to
: * *
* ^ * start and end * replacement: ` id="new"` * * Result:
*/ $this->lexical_updates[ $comparable_name ] = new WP_HTML_Text_Replacement( $this->tag_name_starts_at + $this->tag_name_length, $this->tag_name_starts_at + $this->tag_name_length, ' ' . $updated_attribute ); } /* * Any calls to update the `class` attribute directly should wipe out any * enqueued class changes from `add_class` and `remove_class`. */ if ( 'class' === $comparable_name && ! empty( $this->classname_updates ) ) { $this->classname_updates = array(); } return true; } /** * Remove an attribute from the currently-matched tag. * * @since 6.2.0 * * @param string $name The attribute name to remove. * @return bool Whether an attribute was removed. */ public function remove_attribute( $name ) { if ( $this->is_closing_tag ) { return false; } /* * > There must never be two or more attributes on * > the same start tag whose names are an ASCII * > case-insensitive match for each other. * - HTML 5 spec * * @see https://html.spec.whatwg.org/multipage/syntax.html#attributes-2:ascii-case-insensitive */ $name = strtolower( $name ); /* * Any calls to update the `class` attribute directly should wipe out any * enqueued class changes from `add_class` and `remove_class`. */ if ( 'class' === $name && count( $this->classname_updates ) !== 0 ) { $this->classname_updates = array(); } /* * If updating an attribute that didn't exist in the input * document, then remove the enqueued update and move on. * * For example, this might occur when calling `remove_attribute()` * after calling `set_attribute()` for the same attribute * and when that attribute wasn't originally present. */ if ( ! isset( $this->attributes[ $name ] ) ) { if ( isset( $this->lexical_updates[ $name ] ) ) { unset( $this->lexical_updates[ $name ] ); } return false; } /* * Removes an existing tag attribute. * * Example – remove the attribute id from
: *
* ^-------------^ * start end * replacement: `` * * Result:
*/ $this->lexical_updates[ $name ] = new WP_HTML_Text_Replacement( $this->attributes[ $name ]->start, $this->attributes[ $name ]->end, '' ); // Removes any duplicated attributes if they were also present. if ( null !== $this->duplicate_attributes && array_key_exists( $name, $this->duplicate_attributes ) ) { foreach ( $this->duplicate_attributes[ $name ] as $attribute_token ) { $this->lexical_updates[] = new WP_HTML_Text_Replacement( $attribute_token->start, $attribute_token->end, '' ); } } return true; } /** * Adds a new class name to the currently matched tag. * * @since 6.2.0 * * @param string $class_name The class name to add. * @return bool Whether the class was set to be added. */ public function add_class( $class_name ) { if ( $this->is_closing_tag ) { return false; } if ( null !== $this->tag_name_starts_at ) { $this->classname_updates[ $class_name ] = self::ADD_CLASS; } return true; } /** * Removes a class name from the currently matched tag. * * @since 6.2.0 * * @param string $class_name The class name to remove. * @return bool Whether the class was set to be removed. */ public function remove_class( $class_name ) { if ( $this->is_closing_tag ) { return false; } if ( null !== $this->tag_name_starts_at ) { $this->classname_updates[ $class_name ] = self::REMOVE_CLASS; } return true; } /** * Returns the string representation of the HTML Tag Processor. * * @since 6.2.0 * * @see WP_HTML_Tag_Processor::get_updated_html() * * @return string The processed HTML. */ public function __toString() { return $this->get_updated_html(); } /** * Returns the string representation of the HTML Tag Processor. * * @since 6.2.0 * @since 6.2.1 Shifts the internal cursor corresponding to the applied updates. * * @return string The processed HTML. */ public function get_updated_html() { $requires_no_updating = 0 === count( $this->classname_updates ) && 0 === count( $this->lexical_updates ); /* * When there is nothing more to update and nothing has already been * updated, return the original document and avoid a string copy. */ if ( $requires_no_updating ) { return $this->html; } /* * Keep track of the position right before the current tag. This will * be necessary for reparsing the current tag after updating the HTML. */ $before_current_tag = $this->tag_name_starts_at - 1; /* * 1. Apply the enqueued edits and update all the pointers to reflect those changes. */ $this->class_name_updates_to_attributes_updates(); $before_current_tag += $this->apply_attributes_updates( $before_current_tag ); /* * 2. Rewind to before the current tag and reparse to get updated attributes. * * At this point the internal cursor points to the end of the tag name. * Rewind before the tag name starts so that it's as if the cursor didn't * move; a call to `next_tag()` will reparse the recently-updated attributes * and additional calls to modify the attributes will apply at this same * location. * *

Previous HTMLMore HTML

* ^ | back up by the length of the tag name plus the opening < * \<-/ back up by strlen("em") + 1 ==> 3 */ // Store existing state so it can be restored after reparsing. $previous_parsed_byte_count = $this->bytes_already_parsed; $previous_query = $this->last_query; // Reparse attributes. $this->bytes_already_parsed = $before_current_tag; $this->next_tag(); // Restore previous state. $this->bytes_already_parsed = $previous_parsed_byte_count; $this->parse_query( $previous_query ); return $this->html; } /** * Parses tag query input into internal search criteria. * * @since 6.2.0 * * @param array|string|null $query { * Optional. Which tag name to find, having which class, etc. Default is to find any tag. * * @type string|null $tag_name Which tag to find, or `null` for "any tag." * @type int|null $match_offset Find the Nth tag matching all search criteria. * 1 for "first" tag, 3 for "third," etc. * Defaults to first tag. * @type string|null $class_name Tag must contain this class name to match. * @type string $tag_closers "visit" or "skip": whether to stop on tag closers, e.g.
. * } */ private function parse_query( $query ) { if ( null !== $query && $query === $this->last_query ) { return; } $this->last_query = $query; $this->sought_tag_name = null; $this->sought_class_name = null; $this->sought_match_offset = 1; $this->stop_on_tag_closers = false; // A single string value means "find the tag of this name". if ( is_string( $query ) ) { $this->sought_tag_name = $query; return; } // An empty query parameter applies no restrictions on the search. if ( null === $query ) { return; } // If not using the string interface, an associative array is required. if ( ! is_array( $query ) ) { _doing_it_wrong( __METHOD__, __( 'The query argument must be an array or a tag name.' ), '6.2.0' ); return; } if ( isset( $query['tag_name'] ) && is_string( $query['tag_name'] ) ) { $this->sought_tag_name = $query['tag_name']; } if ( isset( $query['class_name'] ) && is_string( $query['class_name'] ) ) { $this->sought_class_name = $query['class_name']; } if ( isset( $query['match_offset'] ) && is_int( $query['match_offset'] ) && 0 < $query['match_offset'] ) { $this->sought_match_offset = $query['match_offset']; } if ( isset( $query['tag_closers'] ) ) { $this->stop_on_tag_closers = 'visit' === $query['tag_closers']; } } /** * Checks whether a given tag and its attributes match the search criteria. * * @since 6.2.0 * * @return boolean Whether the given tag and its attribute match the search criteria. */ private function matches() { if ( $this->is_closing_tag && ! $this->stop_on_tag_closers ) { return false; } // Does the tag name match the requested tag name in a case-insensitive manner? if ( null !== $this->sought_tag_name ) { /* * String (byte) length lookup is fast. If they aren't the * same length then they can't be the same string values. */ if ( strlen( $this->sought_tag_name ) !== $this->tag_name_length ) { return false; } /* * Check each character to determine if they are the same. * Defer calls to `strtoupper()` to avoid them when possible. * Calling `strcasecmp()` here tested slowed than comparing each * character, so unless benchmarks show otherwise, it should * not be used. * * It's expected that most of the time that this runs, a * lower-case tag name will be supplied and the input will * contain lower-case tag names, thus normally bypassing * the case comparison code. */ for ( $i = 0; $i < $this->tag_name_length; $i++ ) { $html_char = $this->html[ $this->tag_name_starts_at + $i ]; $tag_char = $this->sought_tag_name[ $i ]; if ( $html_char !== $tag_char && strtoupper( $html_char ) !== $tag_char ) { return false; } } } $needs_class_name = null !== $this->sought_class_name; if ( $needs_class_name && ! isset( $this->attributes['class'] ) ) { return false; } /* * Match byte-for-byte (case-sensitive and encoding-form-sensitive) on the class name. * * This will overlook certain classes that exist in other lexical variations * than was supplied to the search query, but requires more complicated searching. */ if ( $needs_class_name ) { $class_start = $this->attributes['class']->value_starts_at; $class_end = $class_start + $this->attributes['class']->value_length; $class_at = $class_start; /* * Ensure that boundaries surround the class name to avoid matching on * substrings of a longer name. For example, the sequence "not-odd" * should not match for the class "odd" even though "odd" is found * within the class attribute text. * * See https://html.spec.whatwg.org/#attributes-3 * See https://html.spec.whatwg.org/#space-separated-tokens */ while ( // phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition false !== ( $class_at = strpos( $this->html, $this->sought_class_name, $class_at ) ) && $class_at < $class_end ) { /* * Verify this class starts at a boundary. */ if ( $class_at > $class_start ) { $character = $this->html[ $class_at - 1 ]; if ( ' ' !== $character && "\t" !== $character && "\f" !== $character && "\r" !== $character && "\n" !== $character ) { $class_at += strlen( $this->sought_class_name ); continue; } } /* * Verify this class ends at a boundary as well. */ if ( $class_at + strlen( $this->sought_class_name ) < $class_end ) { $character = $this->html[ $class_at + strlen( $this->sought_class_name ) ]; if ( ' ' !== $character && "\t" !== $character && "\f" !== $character && "\r" !== $character && "\n" !== $character ) { $class_at += strlen( $this->sought_class_name ); continue; } } return true; } return false; } return true; } }