WP_Duotone::get_selector( WP_Block_Type $block_type ): string|null
- Since
- 6.3.0
- Source
wp-includes/class-wp-duotone.php:962
Description
This handles selectors defined in color.__experimentalDuotone support if filter.duotone support is not defined.
Compatibility
- WordPress
- since 6.3.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.
Parameters
$block_typeWP_Block_Type- Block type to check for support.
Return value
string|null- The CSS selector or null if there is no support.
Performance profile
How much work a call to WP_Duotone::get_selector() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 4–27
- Plugin surface
- None
- Called by
- 1
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 36.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Duotone::get_selector() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!($block_type instanceof) | 4 | none |
$block_type instanceof | 10 | block_has_support() |
$block_type instanceof | 21–23 | block_has_support(), wp_get_block_css_selector() |
$block_type instanceof && is_string($experimental_duotone) | 26–27 | block_has_support(), wp_get_block_css_selector(), ::WP_Theme_JSON() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 36 instructions, 4–27 executed per call, 5 branches. The work does not change between versions.
An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.
Uses · 3
- block_has_support()Checks whether the current block type supports the feature requested.
- wp_get_block_css_selector()Determines the CSS selector for the block type and property provided, returning it if available.
- WP_Theme_JSON::scope_selector()Function that scopes a selector with another one. This works a bit like SCSS nesting except the `&` operator isn't supported.
Used by · 1
- WP_Duotone::render_duotone_support()Render out the duotone CSS styles and SVG.
Source code
private static function get_selector( $block_type ) { if ( ! ( $block_type instanceof WP_Block_Type ) ) { return null; } /* * Backward compatibility with `supports.color.__experimentalDuotone` * is provided via the `block_type_metadata_settings` filter. If * `supports.filter.duotone` has not been set and the experimental * property has been, the experimental property value is copied into * `supports.filter.duotone`. */ $duotone_support = block_has_support( $block_type, array( 'filter', 'duotone' ) ); if ( ! $duotone_support ) { return null; } /* * If the experimental duotone support was set, that value is to be * treated as a selector and requires scoping. */ $experimental_duotone = $block_type->supports['color']['__experimentalDuotone'] ?? false; if ( $experimental_duotone ) { $root_selector = wp_get_block_css_selector( $block_type ); return is_string( $experimental_duotone ) ? WP_Theme_JSON::scope_selector( $root_selector, $experimental_duotone ) : $root_selector; } // Regular filter.duotone support uses filter.duotone selectors with fallbacks. return wp_get_block_css_selector( $block_type, array( 'filter', 'duotone' ), true ); }Changelog
Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 7.1.0 tag, from
src/wp-includes/class-wp-duotone.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
- Something wrong on this page? Report it and it gets fixed in the next regeneration.