
使用WP_Query的基础知识 + 代码示例
wp_get_typography_font_size_value ( $preset, $should_use_fluid_typography = false )
wp_get_typography_font_size_value: 这个函数返回指定排版选项的字体大小值(像素)。它需要两个参数:排版选项名称和一个默认值,如果该选项未被设置,则返回: 该函数从数据库中检索排版选项,并返回转换为像素的字体大小值。
根据给定的字体大小预设,返回一个字体大小值。
考虑到流体排版参数,并试图根据可用的、有效的值来返回一个CSS公式。
function wp_get_typography_font_size_value( $preset, $should_use_fluid_typography = false ) { if ( ! isset( $preset['size'] ) ) { return null; } /* * Catches empty values and 0/'0'. * Fluid calculations cannot be performed on 0. */ if ( empty( $preset['size'] ) ) { return $preset['size']; } // Checks if fluid font sizes are activated. $typography_settings = wp_get_global_settings( array( 'typography' ) ); $should_use_fluid_typography = isset( $typography_settings['fluid'] ) && true === $typography_settings['fluid'] ? true : $should_use_fluid_typography; if ( ! $should_use_fluid_typography ) { return $preset['size']; } // Defaults. $default_maximum_viewport_width = '1600px'; $default_minimum_viewport_width = '768px'; $default_minimum_font_size_factor = 0.75; $default_maximum_font_size_factor = 1.5; $default_scale_factor = 1; $default_minimum_font_size_limit = '14px'; // Font sizes. $fluid_font_size_settings = isset( $preset['fluid'] ) ? $preset['fluid'] : null; // A font size has explicitly bypassed fluid calculations. if ( false === $fluid_font_size_settings ) { return $preset['size']; } // Try to grab explicit min and max fluid font sizes. $minimum_font_size_raw = isset( $fluid_font_size_settings['min'] ) ? $fluid_font_size_settings['min'] : null; $maximum_font_size_raw = isset( $fluid_font_size_settings['max'] ) ? $fluid_font_size_settings['max'] : null; // Font sizes. $preferred_size = wp_get_typography_value_and_unit( $preset['size'] ); // Protect against unsupported units. if ( empty( $preferred_size['unit'] ) ) { return $preset['size']; } // If no fluid max font size is available, create one using max font size factor. if ( ! $maximum_font_size_raw ) { $maximum_font_size_raw = round( $preferred_size['value'] * $default_maximum_font_size_factor, 3 ) . $preferred_size['unit']; } // If no fluid min font size is available, create one using min font size factor. if ( ! $minimum_font_size_raw ) { $minimum_font_size_raw = round( $preferred_size['value'] * $default_minimum_font_size_factor, 3 ) . $preferred_size['unit']; } // Normalizes the minimum font size limit according to the incoming unit, so we can perform checks using it. $minimum_font_size_limit = wp_get_typography_value_and_unit( $default_minimum_font_size_limit, array( 'coerce_to' => $preferred_size['unit'], ) ); if ( ! empty( $minimum_font_size_limit ) ) { /* * If a minimum size was not passed to this function * and the user-defined font size is lower than $minimum_font_size_limit, * then use the user-defined font size as the minimum font-size. */ if ( ! isset( $fluid_font_size_settings['min'] ) && $preferred_size['value'] < $minimum_font_size_limit['value'] ) { $minimum_font_size_raw = implode( '', $preferred_size ); } else { $minimum_font_size_parsed = wp_get_typography_value_and_unit( $minimum_font_size_raw, array( 'coerce_to' => $preferred_size['unit'], ) ); /* * If the passed or calculated minimum font size is lower than $minimum_font_size_limit * use $minimum_font_size_limit instead. */ if ( ! empty( $minimum_font_size_parsed ) && $minimum_font_size_parsed['value'] < $minimum_font_size_limit['value'] ) { $minimum_font_size_raw = implode( '', $minimum_font_size_limit ); } } } $fluid_font_size_value = wp_get_computed_fluid_typography_value( array( 'minimum_viewport_width' => $default_minimum_viewport_width, 'maximum_viewport_width' => $default_maximum_viewport_width, 'minimum_font_size' => $minimum_font_size_raw, 'maximum_font_size' => $maximum_font_size_raw, 'scale_factor' => $default_scale_factor, ) ); if ( ! empty( $fluid_font_size_value ) ) { return $fluid_font_size_value; } return $preset['size']; }