# visualizer/4.0.4/classes/Visualizer/Module/Utility.php Visualizer – Tables & Charts Manager with Built-in AI Generator, version 4.0.4. 472 lines. - Page: https://pluginprobe.com/plugins/visualizer/4.0.4/code/classes/Visualizer/Module/Utility.php - Raw: https://pluginprobe.com/plugins/visualizer/4.0.4/raw/classes/Visualizer/Module/Utility.php - Modified: 2026-03-31T13:30:52+00:00 Line numbers below start at 1. Link to a line or a range by appending a fragment to the page URL, for example `https://pluginprobe.com/plugins/visualizer/4.0.4/code/classes/Visualizer/Module/Utility.php#L10-L20`. ```php | // +----------------------------------------------------------------------+ /** * Utilities module class. * * @category Visualizer * @package Module * * @since 3.3.0 */ class Visualizer_Module_Utility extends Visualizer_Module { const NAME = __CLASS__; /** * Some default distinct colors. * * @since 3.3.0 * * @access private * @var string[] */ private static $_CHART_COLORS = array( '#e6194b', '#3cb44b', '#ffe119', '#4363d8', '#f58231', '#911eb4', '#46f0f0', '#f032e6', '#bcf60c', '#fabebe', '#008080', '#e6beff', '#9a6324', '#fffac8', '#800000', '#aaffc3', '#808000', '#ffd8b1', '#000075', '#808080', ); /** * Constructor. * * @since 3.3.0 * * @access public * * @param Visualizer_Plugin $plugin The instance of the plugin. */ public function __construct( Visualizer_Plugin $plugin ) { parent::__construct( $plugin ); $this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_SETTINGS, 'apply_global_style_settings', 999, 3 ); } /** * Convert hexdec color string to rgb(a) string. * * Props to https://mekshq.com/how-to-convert-hexadecimal-color-code-to-rgb-or-rgba-using-php/ * * @since 3.3.0 * * @access private */ private static function hex2rgba( $color, $opacity = false ) { $default = 'rgb(0,0,0)'; // Return default if no color provided if ( empty( $color ) ) { return $default; } // Sanitize $color if "#" is provided if ( strpos( $color, '#' ) === 0 ) { $color = substr( $color, 1 ); } // Check if color has 6 or 3 characters and get values if ( strlen( $color ) === 6 ) { $hex = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] ); } elseif ( strlen( $color ) === 3 ) { $hex = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] ); } else { return $default; } // Convert hexadec to rgb $rgb = array_map( 'hexdec', $hex ); // Check if opacity is set(rgba or rgb) if ( $opacity ) { if ( abs( $opacity ) > 1 ) { $opacity = 1.0; } $output = 'rgba(' . implode( ',', $rgb ) . ',' . $opacity . ')'; } else { $output = 'rgb(' . implode( ',', $rgb ) . ')'; } // Return rgb(a) color string return $output; } /** * Returns a color at a specific index from the palette, with its transparent equivalent. * * @return array{string, string} * @access private */ private static function get_color_at( int $index ): array { $colors = self::get_color_palette(); $color = $colors[ $index % count( $colors ) ]; return array( self::hex2rgba( $color, 0.5 ), $color ); } /** * Mixes a hex color toward white by the given factor (0 = original, 1 = white). * * @access private */ private static function tint_color( string $hex, float $factor ): string { $hex = ltrim( $hex, '#' ); if ( strlen( $hex ) === 3 ) { $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2]; } $r = (int) round( hexdec( substr( $hex, 0, 2 ) ) + ( 255 - hexdec( substr( $hex, 0, 2 ) ) ) * $factor ); $g = (int) round( hexdec( substr( $hex, 2, 2 ) ) + ( 255 - hexdec( substr( $hex, 2, 2 ) ) ) * $factor ); $b = (int) round( hexdec( substr( $hex, 4, 2 ) ) + ( 255 - hexdec( substr( $hex, 4, 2 ) ) ) * $factor ); return sprintf( '#%02x%02x%02x', $r, $g, $b ); } /** * Returns the color palette to use for charts. * * When global primary/secondary colors are configured, generates a palette of * alternating tints: [primary, secondary, primary@25%, secondary@25%, ...]. * Falls back to the built-in colors otherwise. * * @return string[] * @access private */ private static function get_color_palette(): array { $global = self::get_global_style_defaults(); $primary = $global['color_primary']; $secondary = $global['color_secondary']; if ( empty( $primary ) && empty( $secondary ) ) { return self::$_CHART_COLORS; } $bases = array_filter( array( $primary, $secondary ) ); $factors = array( 0, 0.25, 0.5, 0.75 ); $palette = array(); foreach ( $factors as $factor ) { foreach ( $bases as $base ) { $palette[] = $factor === 0 ? $base : self::tint_color( $base, $factor ); } } return $palette; } /** * Returns the global style defaults stored in the plugin settings. * * @return array * @access public * @static */ public static function get_global_style_defaults(): array { $option = get_option( Visualizer_Module_Admin::OPTION_GLOBAL_SETTINGS, array() ); return wp_parse_args( $option, array( 'color_primary' => '', 'color_secondary' => '', 'apply_existing' => '0', ) ); } /** * Applies global styles to existing charts at render time. * * @param array|mixed $settings Chart settings. * @param int $chart_id Chart ID. * @param string $type Chart type. * @return array * @access public */ public function apply_global_style_settings( $settings, $chart_id, $type ): array { $settings = is_array( $settings ) ? $settings : array(); $global = self::get_global_style_defaults(); if ( empty( $global['apply_existing'] ) ) { return $settings; } if ( empty( $global['color_primary'] ) && empty( $global['color_secondary'] ) ) { return $settings; } if ( empty( $chart_id ) ) { return $settings; } $library = get_post_meta( $chart_id, Visualizer_Plugin::CF_CHART_LIBRARY, true ); $library = is_string( $library ) ? strtolower( $library ) : ''; if ( empty( $type ) ) { $type = get_post_meta( $chart_id, Visualizer_Plugin::CF_CHART_TYPE, true ); } $type = is_string( $type ) ? strtolower( $type ) : ''; if ( empty( $library ) ) { $library = in_array( $type, array( 'datatable', 'tabular' ), true ) ? 'datatable' : 'googlecharts'; } if ( 'googlecharts' === $library || 'google' === $library ) { if ( 'geo' !== $type ) { $has_explicit = false; if ( ! empty( $settings['colors'] ) ) { $has_explicit = true; } if ( ! $has_explicit && isset( $settings['series'] ) && is_array( $settings['series'] ) ) { foreach ( $settings['series'] as $series_settings ) { if ( ! empty( $series_settings['color'] ) ) { $has_explicit = true; break; } } } if ( ! $has_explicit && isset( $settings['slices'] ) && is_array( $settings['slices'] ) ) { foreach ( $settings['slices'] as $slice_settings ) { if ( ! empty( $slice_settings['color'] ) ) { $has_explicit = true; break; } } } if ( ! $has_explicit ) { $settings['colors'] = self::get_color_palette(); } } return $settings; } if ( 'chartjs' === $library ) { $has_explicit = false; if ( isset( $settings['series'] ) && is_array( $settings['series'] ) ) { foreach ( $settings['series'] as $series_settings ) { if ( ! empty( $series_settings['backgroundColor'] ) || ! empty( $series_settings['borderColor'] ) || ! empty( $series_settings['hoverBackgroundColor'] ) ) { $has_explicit = true; break; } } } if ( ! $has_explicit && isset( $settings['slices'] ) && is_array( $settings['slices'] ) ) { foreach ( $settings['slices'] as $slice_settings ) { if ( ! empty( $slice_settings['backgroundColor'] ) || ! empty( $slice_settings['borderColor'] ) || ! empty( $slice_settings['hoverBackgroundColor'] ) ) { $has_explicit = true; break; } } } if ( $has_explicit ) { return $settings; } $series = get_post_meta( $chart_id, Visualizer_Plugin::CF_SERIES, true ); if ( is_array( $series ) ) { $settings = self::apply_chartjs_palette( $settings, $type, $series, $chart_id ); } } return $settings; } /** * Applies the global palette to ChartJS settings for a chart. * * @param array $settings Current chart settings. * @param string $type Chart type. * @param array $series Series definitions. * @param int $chart_id Chart ID. * @return array * @access private * @static */ private static function apply_chartjs_palette( array $settings, string $type, array $series, int $chart_id ): array { $attributes = array(); $name = 'series'; $count = count( $series ); $max = $count - 1; switch ( $type ) { case 'polarArea': // fall through. case 'pie': $chart = get_post( $chart_id ); $data = $chart instanceof WP_Post ? maybe_unserialize( $chart->post_content ) : array(); $name = 'slices'; $max = is_array( $data ) ? count( $data ) : $count; // fall through. case 'column': // fall through. case 'bar': for ( $i = 0; $i < $max; $i++ ) { $colors = self::get_color_at( $i ); $attributes[] = array( 'backgroundColor' => $colors[0], 'hoverBackgroundColor' => $colors[1] ); } break; case 'radar': // fall through. case 'line': // fall through. case 'area': for ( $i = 0; $i < $max; $i++ ) { $colors = self::get_color_at( $i ); $attributes[] = array( 'borderColor' => $colors[0] ); } break; } if ( $attributes ) { $settings[ $name ] = $attributes; } return $settings; } /** * Sets some defaults in the chart. * * @since 3.3.0 * * @access public */ public static function set_defaults( $chart, $post_status = 'auto-draft' ) { $type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); $library = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_LIBRARY, true ); // if post_status is null, operate on the chart irrespective of the post_status if ( ( ! is_null( $post_status ) && $chart->post_status !== $post_status ) ) { return; } $series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); if ( ! $series || ! is_array( $series ) ) { return; } switch ( $library ) { case 'ChartJS': self::set_defaults_chartjs( $chart, $post_status ); break; case 'GoogleCharts': self::set_defaults_google( $chart, $post_status ); break; } } /** * Sets some defaults in the chart for Google charts. * * @since 3.3.0 * * @access private */ private static function set_defaults_google( $chart, $post_status ) { $type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); $series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); $attributes = array(); if ( $post_status === 'auto-draft' ) { switch ( $type ) { case 'combo': // chart type 'bars' and randomly choose the type of each series. $types = array( 'area', 'line', 'steppedArea', 'bar' ); $attributes['seriesType'] = 'bars'; for ( $x = 0; $x < count( $series ); $x++ ) { $attributes['series'][ $x ]['type'] = $types[ rand( 0, count( $types ) - 1 ) ]; } break; case 'candlestick': // add stroke and fill color so that behavior is consistent. $attributes['candlestick']['fallingColor']['stroke'] = '#3366cc'; $attributes['candlestick']['fallingColor']['fill'] = '#fff'; $attributes['candlestick']['risingColor']['stroke'] = '#3366cc'; $attributes['candlestick']['risingColor']['fill'] = '#3366cc'; break; } // Apply global color defaults to new Google Charts (not Geo — it uses colorAxis). if ( 'geo' !== $type ) { $global = self::get_global_style_defaults(); if ( ! empty( $global['color_primary'] ) || ! empty( $global['color_secondary'] ) ) { $attributes['colors'] = self::get_color_palette(); } } } if ( $attributes ) { $settings = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, true ); update_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, array_merge( $settings, $attributes ) ); } } /** * Sets some defaults in the chart for ChartJS charts. Only during first creation. * * @since 3.3.0 * * @access private */ private static function set_defaults_chartjs( $chart, $post_status ) { if ( $post_status !== 'auto-draft' ) { return; } $type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); $series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); $settings = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, true ); $attributes = array(); $name = 'series'; $count = count( $series ); $max = $count - 1; switch ( $type ) { case 'polarArea': // fall through. case 'pie': $data = unserialize( $chart->post_content ); $name = 'slices'; $max = count( $data ); // fall through. case 'column': // fall through. case 'bar': for ( $i = 0; $i < $max; $i++ ) { $colors = self::get_color_at( $i ); $attributes[] = array( 'backgroundColor' => $colors[0], 'hoverBackgroundColor' => $colors[1] ); } break; case 'radar': // fall through. case 'line': // fall through. case 'area': for ( $i = 0; $i < $max; $i++ ) { $colors = self::get_color_at( $i ); $attributes[] = array( 'borderColor' => $colors[0] ); } break; } if ( $post_status === 'auto-draft' ) { // the charts are huge in size so let's always get them down to 50%. $settings['width'] = $settings['height'] = '50%'; } if ( $attributes ) { $settings[ $name ] = $attributes; update_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, $settings ); } } } ```