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<?php |
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// +----------------------------------------------------------------------+ |
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// | Copyright 2013 Madpixels (email : visualizer@madpixels.net) | |
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// +----------------------------------------------------------------------+ |
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// | This program is free software; you can redistribute it and/or modify | |
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// | it under the terms of the GNU General Public License, version 2, as | |
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// | published by the Free Software Foundation. | |
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// | | |
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// | This program is distributed in the hope that it will be useful, | |
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// | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
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// | GNU General Public License for more details. | |
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// | | |
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// | You should have received a copy of the GNU General Public License | |
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// | along with this program; if not, write to the Free Software | |
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// | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
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// | MA 02110-1301 USA | |
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// +----------------------------------------------------------------------+ |
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// | Author: Eugene Manuilov <eugene@manuilov.org> | |
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// +----------------------------------------------------------------------+ |
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/** |
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* Utilities module class. |
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* |
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* @category Visualizer |
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* @package Module |
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* |
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* @since 3.3.0 |
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*/ |
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class Visualizer_Module_Utility extends Visualizer_Module { |
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|
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const NAME = __CLASS__; |
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|
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/** |
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* Some default distinct colors. |
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* |
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* @since 3.3.0 |
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* |
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* @access private |
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* @var string[] |
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*/ |
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private static $_CHART_COLORS = array( |
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'#e6194b', '#3cb44b', '#ffe119', '#4363d8', '#f58231', '#911eb4', '#46f0f0', '#f032e6', '#bcf60c', '#fabebe', '#008080', '#e6beff', '#9a6324', '#fffac8', '#800000', '#aaffc3', '#808000', '#ffd8b1', '#000075', '#808080', |
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); |
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|
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|
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/** |
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* Constructor. |
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* |
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* @since 3.3.0 |
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* |
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* @access public |
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* |
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* @param Visualizer_Plugin $plugin The instance of the plugin. |
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*/ |
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public function __construct( Visualizer_Plugin $plugin ) { |
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parent::__construct( $plugin ); |
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$this->_addFilter( Visualizer_Plugin::FILTER_GET_CHART_SETTINGS, 'apply_global_style_settings', 999, 3 ); |
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} |
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|
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|
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/** |
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* Convert hexdec color string to rgb(a) string. |
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* |
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* Props to https://mekshq.com/how-to-convert-hexadecimal-color-code-to-rgb-or-rgba-using-php/ |
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* |
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* @since 3.3.0 |
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* |
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* @access private |
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*/ |
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private static function hex2rgba( $color, $opacity = false ) { |
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$default = 'rgb(0,0,0)'; |
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|
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// Return default if no color provided |
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if ( empty( $color ) ) { |
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return $default; |
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} |
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|
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// Sanitize $color if "#" is provided |
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if ( strpos( $color, '#' ) === 0 ) { |
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$color = substr( $color, 1 ); |
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} |
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|
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// Check if color has 6 or 3 characters and get values |
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if ( strlen( $color ) === 6 ) { |
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$hex = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] ); |
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} elseif ( strlen( $color ) === 3 ) { |
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$hex = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] ); |
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} else { |
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return $default; |
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} |
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|
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// Convert hexadec to rgb |
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$rgb = array_map( 'hexdec', $hex ); |
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|
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// Check if opacity is set(rgba or rgb) |
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if ( $opacity ) { |
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if ( abs( $opacity ) > 1 ) { |
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$opacity = 1.0; |
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} |
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$output = 'rgba(' . implode( ',', $rgb ) . ',' . $opacity . ')'; |
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} else { |
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$output = 'rgb(' . implode( ',', $rgb ) . ')'; |
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} |
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|
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// Return rgb(a) color string |
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return $output; |
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} |
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|
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/** |
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* Returns a color at a specific index from the palette, with its transparent equivalent. |
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* |
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* @return array{string, string} |
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* @access private |
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*/ |
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private static function get_color_at( int $index ): array { |
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$colors = self::get_color_palette(); |
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$color = $colors[ $index % count( $colors ) ]; |
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return array( self::hex2rgba( $color, 0.5 ), $color ); |
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} |
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|
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/** |
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* Mixes a hex color toward white by the given factor (0 = original, 1 = white). |
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* |
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* @access private |
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*/ |
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private static function tint_color( string $hex, float $factor ): string { |
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$hex = ltrim( $hex, '#' ); |
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if ( strlen( $hex ) === 3 ) { |
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$hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2]; |
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} |
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$r = (int) round( hexdec( substr( $hex, 0, 2 ) ) + ( 255 - hexdec( substr( $hex, 0, 2 ) ) ) * $factor ); |
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$g = (int) round( hexdec( substr( $hex, 2, 2 ) ) + ( 255 - hexdec( substr( $hex, 2, 2 ) ) ) * $factor ); |
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$b = (int) round( hexdec( substr( $hex, 4, 2 ) ) + ( 255 - hexdec( substr( $hex, 4, 2 ) ) ) * $factor ); |
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return sprintf( '#%02x%02x%02x', $r, $g, $b ); |
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} |
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|
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/** |
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* Returns the color palette to use for charts. |
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* |
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* When global primary/secondary colors are configured, generates a palette of |
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* alternating tints: [primary, secondary, primary@25%, secondary@25%, ...]. |
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* Falls back to the built-in colors otherwise. |
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* |
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* @return string[] |
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* @access private |
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*/ |
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private static function get_color_palette(): array { |
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$global = self::get_global_style_defaults(); |
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$primary = $global['color_primary']; |
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$secondary = $global['color_secondary']; |
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|
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if ( empty( $primary ) && empty( $secondary ) ) { |
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return self::$_CHART_COLORS; |
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} |
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|
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$bases = array_filter( array( $primary, $secondary ) ); |
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$factors = array( 0, 0.25, 0.5, 0.75 ); |
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$palette = array(); |
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|
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foreach ( $factors as $factor ) { |
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foreach ( $bases as $base ) { |
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$palette[] = $factor === 0 ? $base : self::tint_color( $base, $factor ); |
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} |
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} |
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|
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return $palette; |
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} |
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|
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/** |
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* Returns the global style defaults stored in the plugin settings. |
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* |
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* @return array<string, string> |
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* @access public |
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* @static |
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*/ |
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public static function get_global_style_defaults(): array { |
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$option = get_option( Visualizer_Module_Admin::OPTION_GLOBAL_SETTINGS, array() ); |
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return wp_parse_args( |
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$option, |
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array( |
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'color_primary' => '', |
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'color_secondary' => '', |
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'apply_existing' => '0', |
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) |
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); |
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} |
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|
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/** |
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* Applies global styles to existing charts at render time. |
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* |
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* @param array<string, mixed>|mixed $settings Chart settings. |
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* @param int $chart_id Chart ID. |
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* @param string $type Chart type. |
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* @return array<string, mixed> |
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* @access public |
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*/ |
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public function apply_global_style_settings( $settings, $chart_id, $type ): array { |
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$settings = is_array( $settings ) ? $settings : array(); |
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$global = self::get_global_style_defaults(); |
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|
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if ( empty( $global['apply_existing'] ) ) { |
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return $settings; |
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} |
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|
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if ( empty( $global['color_primary'] ) && empty( $global['color_secondary'] ) ) { |
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return $settings; |
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} |
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|
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if ( empty( $chart_id ) ) { |
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return $settings; |
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} |
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|
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$library = get_post_meta( $chart_id, Visualizer_Plugin::CF_CHART_LIBRARY, true ); |
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$library = is_string( $library ) ? strtolower( $library ) : ''; |
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if ( empty( $type ) ) { |
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$type = get_post_meta( $chart_id, Visualizer_Plugin::CF_CHART_TYPE, true ); |
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} |
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$type = is_string( $type ) ? strtolower( $type ) : ''; |
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|
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if ( empty( $library ) ) { |
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$library = in_array( $type, array( 'datatable', 'tabular' ), true ) ? 'datatable' : 'googlecharts'; |
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} |
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|
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if ( 'googlecharts' === $library || 'google' === $library ) { |
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if ( 'geo' !== $type ) { |
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$has_explicit = false; |
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if ( ! empty( $settings['colors'] ) ) { |
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$has_explicit = true; |
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} |
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if ( ! $has_explicit && isset( $settings['series'] ) && is_array( $settings['series'] ) ) { |
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foreach ( $settings['series'] as $series_settings ) { |
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if ( ! empty( $series_settings['color'] ) ) { |
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$has_explicit = true; |
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break; |
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} |
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} |
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} |
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if ( ! $has_explicit && isset( $settings['slices'] ) && is_array( $settings['slices'] ) ) { |
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foreach ( $settings['slices'] as $slice_settings ) { |
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if ( ! empty( $slice_settings['color'] ) ) { |
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$has_explicit = true; |
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break; |
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} |
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} |
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} |
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if ( ! $has_explicit ) { |
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$settings['colors'] = self::get_color_palette(); |
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} |
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} |
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return $settings; |
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} |
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|
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if ( 'chartjs' === $library ) { |
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$has_explicit = false; |
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if ( isset( $settings['series'] ) && is_array( $settings['series'] ) ) { |
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foreach ( $settings['series'] as $series_settings ) { |
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if ( ! empty( $series_settings['backgroundColor'] ) || ! empty( $series_settings['borderColor'] ) || ! empty( $series_settings['hoverBackgroundColor'] ) ) { |
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$has_explicit = true; |
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break; |
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} |
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} |
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} |
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if ( ! $has_explicit && isset( $settings['slices'] ) && is_array( $settings['slices'] ) ) { |
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foreach ( $settings['slices'] as $slice_settings ) { |
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if ( ! empty( $slice_settings['backgroundColor'] ) || ! empty( $slice_settings['borderColor'] ) || ! empty( $slice_settings['hoverBackgroundColor'] ) ) { |
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$has_explicit = true; |
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break; |
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} |
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} |
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} |
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if ( $has_explicit ) { |
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return $settings; |
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} |
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$series = get_post_meta( $chart_id, Visualizer_Plugin::CF_SERIES, true ); |
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if ( is_array( $series ) ) { |
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$settings = self::apply_chartjs_palette( $settings, $type, $series, $chart_id ); |
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} |
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} |
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|
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return $settings; |
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} |
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|
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/** |
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* Applies the global palette to ChartJS settings for a chart. |
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* |
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* @param array<string, mixed> $settings Current chart settings. |
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* @param string $type Chart type. |
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* @param array<int, mixed> $series Series definitions. |
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* @param int $chart_id Chart ID. |
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* @return array<string, mixed> |
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* @access private |
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* @static |
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*/ |
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private static function apply_chartjs_palette( array $settings, string $type, array $series, int $chart_id ): array { |
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$attributes = array(); |
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$name = 'series'; |
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$count = count( $series ); |
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$max = $count - 1; |
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|
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switch ( $type ) { |
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case 'polarArea': |
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// fall through. |
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case 'pie': |
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$chart = get_post( $chart_id ); |
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$data = $chart instanceof WP_Post ? maybe_unserialize( $chart->post_content ) : array(); |
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$name = 'slices'; |
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$max = is_array( $data ) ? count( $data ) : $count; |
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// fall through. |
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case 'column': |
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// fall through. |
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case 'bar': |
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for ( $i = 0; $i < $max; $i++ ) { |
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$colors = self::get_color_at( $i ); |
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$attributes[] = array( 'backgroundColor' => $colors[0], 'hoverBackgroundColor' => $colors[1] ); |
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} |
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break; |
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case 'radar': |
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// fall through. |
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case 'line': |
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// fall through. |
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case 'area': |
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for ( $i = 0; $i < $max; $i++ ) { |
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$colors = self::get_color_at( $i ); |
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$attributes[] = array( 'borderColor' => $colors[0] ); |
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} |
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break; |
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} |
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|
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if ( $attributes ) { |
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$settings[ $name ] = $attributes; |
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} |
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|
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return $settings; |
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} |
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|
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/** |
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* Sets some defaults in the chart. |
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* |
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* @since 3.3.0 |
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* |
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* @access public |
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*/ |
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public static function set_defaults( $chart, $post_status = 'auto-draft' ) { |
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$type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); |
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$library = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_LIBRARY, true ); |
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|
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// if post_status is null, operate on the chart irrespective of the post_status |
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if ( ( ! is_null( $post_status ) && $chart->post_status !== $post_status ) ) { |
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return; |
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} |
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|
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$series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); |
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if ( ! $series || ! is_array( $series ) ) { |
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return; |
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} |
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|
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switch ( $library ) { |
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case 'ChartJS': |
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self::set_defaults_chartjs( $chart, $post_status ); |
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break; |
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case 'GoogleCharts': |
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self::set_defaults_google( $chart, $post_status ); |
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break; |
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} |
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} |
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|
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/** |
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* Sets some defaults in the chart for Google charts. |
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* |
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* @since 3.3.0 |
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* |
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* @access private |
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*/ |
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private static function set_defaults_google( $chart, $post_status ) { |
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$type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); |
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$series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); |
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|
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$attributes = array(); |
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if ( $post_status === 'auto-draft' ) { |
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switch ( $type ) { |
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case 'combo': |
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// chart type 'bars' and randomly choose the type of each series. |
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$types = array( 'area', 'line', 'steppedArea', 'bar' ); |
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$attributes['seriesType'] = 'bars'; |
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for ( $x = 0; $x < count( $series ); $x++ ) { |
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$attributes['series'][ $x ]['type'] = $types[ rand( 0, count( $types ) - 1 ) ]; |
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} |
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break; |
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case 'candlestick': |
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// add stroke and fill color so that behavior is consistent. |
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$attributes['candlestick']['fallingColor']['stroke'] = '#3366cc'; |
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$attributes['candlestick']['fallingColor']['fill'] = '#fff'; |
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$attributes['candlestick']['risingColor']['stroke'] = '#3366cc'; |
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$attributes['candlestick']['risingColor']['fill'] = '#3366cc'; |
| 395 |
break; |
| 396 |
} |
| 397 |
|
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// Apply global color defaults to new Google Charts (not Geo — it uses colorAxis). |
| 399 |
if ( 'geo' !== $type ) { |
| 400 |
$global = self::get_global_style_defaults(); |
| 401 |
if ( ! empty( $global['color_primary'] ) || ! empty( $global['color_secondary'] ) ) { |
| 402 |
$attributes['colors'] = self::get_color_palette(); |
| 403 |
} |
| 404 |
} |
| 405 |
} |
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|
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if ( $attributes ) { |
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$settings = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, true ); |
| 409 |
update_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, array_merge( $settings, $attributes ) ); |
| 410 |
} |
| 411 |
} |
| 412 |
|
| 413 |
/** |
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* Sets some defaults in the chart for ChartJS charts. Only during first creation. |
| 415 |
* |
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* @since 3.3.0 |
| 417 |
* |
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* @access private |
| 419 |
*/ |
| 420 |
private static function set_defaults_chartjs( $chart, $post_status ) { |
| 421 |
if ( $post_status !== 'auto-draft' ) { |
| 422 |
return; |
| 423 |
} |
| 424 |
|
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$type = get_post_meta( $chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true ); |
| 426 |
$series = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ); |
| 427 |
$settings = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, true ); |
| 428 |
|
| 429 |
$attributes = array(); |
| 430 |
$name = 'series'; |
| 431 |
$count = count( $series ); |
| 432 |
$max = $count - 1; |
| 433 |
switch ( $type ) { |
| 434 |
case 'polarArea': |
| 435 |
// fall through. |
| 436 |
case 'pie': |
| 437 |
$data = unserialize( $chart->post_content ); |
| 438 |
$name = 'slices'; |
| 439 |
$max = count( $data ); |
| 440 |
// fall through. |
| 441 |
case 'column': |
| 442 |
// fall through. |
| 443 |
case 'bar': |
| 444 |
for ( $i = 0; $i < $max; $i++ ) { |
| 445 |
$colors = self::get_color_at( $i ); |
| 446 |
$attributes[] = array( 'backgroundColor' => $colors[0], 'hoverBackgroundColor' => $colors[1] ); |
| 447 |
} |
| 448 |
break; |
| 449 |
case 'radar': |
| 450 |
// fall through. |
| 451 |
case 'line': |
| 452 |
// fall through. |
| 453 |
case 'area': |
| 454 |
for ( $i = 0; $i < $max; $i++ ) { |
| 455 |
$colors = self::get_color_at( $i ); |
| 456 |
$attributes[] = array( 'borderColor' => $colors[0] ); |
| 457 |
} |
| 458 |
break; |
| 459 |
} |
| 460 |
|
| 461 |
if ( $post_status === 'auto-draft' ) { |
| 462 |
// the charts are huge in size so let's always get them down to 50%. |
| 463 |
$settings['width'] = $settings['height'] = '50%'; |
| 464 |
} |
| 465 |
|
| 466 |
if ( $attributes ) { |
| 467 |
$settings[ $name ] = $attributes; |
| 468 |
update_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, $settings ); |
| 469 |
} |
| 470 |
} |
| 471 |
} |
| 472 |
|
