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<?php

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/**

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* class CTF_Theme_CSS

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namespace TwitterFeed\Builder;

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class CTF_Theme_CSS {

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const WRAP_SELECTOR = '.ctf-preview-ctn';

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/**

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* @var string

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var $file;

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/**

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* @var string

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var $css;

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/**

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* @var array

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var $parsed;

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/**

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* @var array

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var $styles;

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public function __construct( $file ) {

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$this->file = $file;

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}

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/**

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* Whether or not a cache exists for this stylesheet. Updates daily or when the theme's stylesheet changes

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* @return bool

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* @since 2.0

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public function is_cached() {

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$stored_styles = get_option( 'ctf_theme_styles', array( 'file' => '', 'last_checked' => 0, 'styles' => array() ) );

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if ( empty( $stored_styles['file'] )

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|| $stored_styles['file'] !== $this->file ) {

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return false;

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}

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if ( empty( $stored_styles['last_checked'] )

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|| $stored_styles['last_checked'] < (time() - DAY_IN_SECONDS) ) {

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return false;

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}

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$this->styles = $stored_styles['styles'];

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return true;

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}

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/**

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* Stores the styles in a wp_option

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* @return bool

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* @since 2.0

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public function cache() {

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$stored_styles = get_option( 'ctf_theme_styles', array( 'file' => '', 'last_checked' => 0, 'styles' => array() ) );

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$stored_styles['file'] = $this->file;

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$stored_styles['styles'] = $this->styles;

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$stored_styles['last_checked'] = time();

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return update_option( 'ctf_theme_styles', $stored_styles, false );

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}

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/**

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* @return array

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* @since 2.0

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public function get_styles() {

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return $this->styles;

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}

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/**

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* Makes an HTTP request to get the contents of the stylesheet

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* @since 2.0

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public function load_css() {

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$url = $this->file;

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$args = array(

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'timeout' => 60,

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'sslverify' => false

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);

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$response = wp_remote_get( esc_url_raw( $url ), $args );

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if ( ! is_wp_error( $response ) ) {

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// certain ways of representing the html for double quotes causes errors so replaced here.

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$this->css = $response['body'];

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} else {

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$this->css = false;

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}

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}

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/**

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* Uses a regex to detect selectors and styles and coverts them to key => value pairs

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* @return bool

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* @since 2.0

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public function parse() {

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if ( empty( $this->css ) ) {

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return false;

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}

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$css = $this->css;

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preg_match_all( '/(?ims)([a-z0-9\s\.\:#_\-@,]+)\{([^\}]*)\}/', $css, $arr);

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$result = array();

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foreach ( $arr[0] as $i => $x ){

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$selector = trim( $arr[1][ $i ] );

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$rules = explode( ';', trim( $arr[2][ $i ] ) );

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$rules_arr = array();

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foreach ( $rules as $strRule ) {

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if ( !empty( $strRule ) ) {

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$rule = explode( ":", $strRule );

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$rule_0 = isset( $rule[0] ) ? $rule[0] : 'null';

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$rule_1 = isset( $rule[1] ) ? $rule[1] : '';

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$rules_arr[ trim($rule_0) ] = trim( $rule_1 );

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}

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}

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$selectors = explode(',', trim( $selector ) );

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foreach ( $selectors as $strSel ) {

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if ( ! isset( $result[ $strSel ] ) ) {

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$result[ $strSel ] = $rules_arr;

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} else {

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$result[ $strSel . '_2' ] = $rules_arr;

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}

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}

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}

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$this->parsed = $result;

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}

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/**

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* Looks for styles based on specified selectors that are used

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* in generating the style HTML

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* @return array

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* @since 2.0

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public function find_styles() {

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if ( empty( $this->css ) ) {

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return array();

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}

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foreach ( $this->parsed as $selector => $property_array ) {

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foreach ( $property_array as $property => $style ) {

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$this->process( $selector, $property, $style );

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}

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}

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}

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/**

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* Loop through all selectors and see if they can be used in our generated

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* style HTML

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* @param string $selector

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* @param string $property

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* @param string $style

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* @since 2.0

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public function process( $selector, $property, $style ) {

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$selector = trim( $selector );

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if ( $selector === 'body' ) {

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if ( in_array( $property, array( 'color', 'background-color', 'background', 'font-size' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === 'a' ) {

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if ( in_array( $property, array( 'color', 'font-weight', 'text-decoration' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === 'a:hover' ) {

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if ( in_array( $property, array( 'color', 'font-weight', 'text-decoration' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === 'p' ) {

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if ( in_array( $property, array( 'color', 'font-weight', 'font-size' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === 'h3' ) {

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if ( in_array( $property, array( 'color', 'font-weight', 'font-size' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === '.entry-content' ) {

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if ( in_array( $property, array( 'color', 'font-size' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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} elseif ( $selector === '.entry-content a' ) {

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if ( in_array( $property, array( 'color', 'font-weight', 'text-decoration' ), true ) ) {

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if ( ! isset( $this->styles[ $selector ]['properties'][ $property ]['style'] ) ) {

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$this->styles[ $selector ]['properties'][ $property ]['style'] = $style;

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}

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}

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}

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}

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/**

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* Creates the actual style HTML as a string

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* @return string

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* @since 2.0

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public function generate_style_html() {

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if ( empty( $this->styles ) ) {

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return '';

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}

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$wrap_selector = self::WRAP_SELECTOR;

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$html = '<style id="sb-customizer-preview-styles">' . "\n";

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foreach ( $this->styles as $selector => $data ) {

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$selector = $selector === 'body' ? $wrap_selector : $wrap_selector . ' ' . $selector;

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$html .= $selector . '{' . "\n";

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foreach ( $data as $property_data => $values ) {

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foreach ( $values as $property_key => $property_values ) {

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$html .= ' ' . $property_key . ': ' . $property_values['style'] . ';' . "\n";

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}

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}

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$html .= '}' . "\n";

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}

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$html .= '</style>';

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return $html;

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}

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}

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