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Allow selector ordering to ensure theme.json root selector margin tak…
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…es precedence (#36960)

* Set default margin on body prior to generating styles from theme.json

* Add additional context to comment

Addresses #36960 (comment)

* Restore simple version of body rule

Also avoids creating failing unit tests due to a single space character changing in a snaphshot!

* Update with fixes made in Core patch

See WordPress/wordpress-develop#1989

* Fix output now includes new line.

* Fix tests relating to spacing

* Fix test to put body CSS reset first
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@getdave
getdave committed Dec 9, 2021
1 parent c386fd0 commit 30aab8a
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Showing 2 changed files with 14 additions and 3 deletions.
13 changes: 12 additions & 1 deletion lib/compat/wordpress-5.9/class-wp-theme-json-gutenberg.php
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Original file line number Diff line number Diff line change
Expand Up @@ -714,6 +714,18 @@ private function get_block_classes( $style_nodes ) {
}
}

/*
* Reset default browser margin on the root body element.
* This is set on the root selector **before** generating the ruleset
* from the `theme.json`. This is to ensure that if the `theme.json` declares
* `margin` in its `spacing` declaration for the `body` element then these
* user-generated values take precedence in the CSS cascade.
* @link https://github.com/WordPress/gutenberg/issues/36147.
*/
if ( self::ROOT_BLOCK_SELECTOR === $selector ) {
$block_rules .= 'body { margin: 0; }';
}

// 2. Generate the rules that use the general selector.
$block_rules .= self::to_ruleset( $selector, $declarations );

Expand All @@ -724,7 +736,6 @@ private function get_block_classes( $style_nodes ) {
}

if ( self::ROOT_BLOCK_SELECTOR === $selector ) {
$block_rules .= 'body { margin: 0; }';
$block_rules .= '.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }';
$block_rules .= '.wp-site-blocks > .alignright { float: right; margin-left: 2em; }';
$block_rules .= '.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }';
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4 changes: 2 additions & 2 deletions phpunit/class-wp-theme-json-test.php
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Original file line number Diff line number Diff line change
Expand Up @@ -355,7 +355,7 @@ function test_get_stylesheet_renders_enabled_protected_properties() {
)
);

$expected = 'body{--wp--style--block-gap: 1em;}body { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }.wp-site-blocks > * { margin-top: 0; margin-bottom: 0; }.wp-site-blocks > * + * { margin-top: var( --wp--style--block-gap ); }.wp-block-columns{--wp--style--block-gap: 24px;}';
$expected = 'body { margin: 0; }body{--wp--style--block-gap: 1em;}.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }.wp-site-blocks > * { margin-top: 0; margin-bottom: 0; }.wp-site-blocks > * + * { margin-top: var( --wp--style--block-gap ); }.wp-block-columns{--wp--style--block-gap: 24px;}';
$this->assertEquals( $expected, $theme_json->get_stylesheet() );
$this->assertEquals( $expected, $theme_json->get_stylesheet( array( 'styles' ) ) );
}
Expand Down Expand Up @@ -481,7 +481,7 @@ function test_get_stylesheet() {
);

$variables = 'body{--wp--preset--color--grey: grey;--wp--preset--font-family--small: 14px;--wp--preset--font-family--big: 41px;}.wp-block-group{--wp--custom--base-font: 16;--wp--custom--line-height--small: 1.2;--wp--custom--line-height--medium: 1.4;--wp--custom--line-height--large: 1.8;}';
$styles = 'body{color: var(--wp--preset--color--grey);}body { margin: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }.wp-site-blocks > * { margin-top: 0; margin-bottom: 0; }.wp-site-blocks > * + * { margin-top: var( --wp--style--block-gap ); }a{background-color: #333;color: #111;}.wp-block-group{border-radius: 10px;padding: 24px;}.wp-block-group a{color: #111;}h1,h2,h3,h4,h5,h6{color: #123456;}h1 a,h2 a,h3 a,h4 a,h5 a,h6 a{background-color: #333;color: #111;font-size: 60px;}.wp-block-post-date{color: #123456;}.wp-block-post-date a{background-color: #777;color: #555;}.wp-block-image{border-top-left-radius: 10px;border-bottom-right-radius: 1em;margin-bottom: 30px;}';
$styles = 'body { margin: 0; }body{color: var(--wp--preset--color--grey);}.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }.wp-site-blocks > * { margin-top: 0; margin-bottom: 0; }.wp-site-blocks > * + * { margin-top: var( --wp--style--block-gap ); }a{background-color: #333;color: #111;}.wp-block-group{border-radius: 10px;padding: 24px;}.wp-block-group a{color: #111;}h1,h2,h3,h4,h5,h6{color: #123456;}h1 a,h2 a,h3 a,h4 a,h5 a,h6 a{background-color: #333;color: #111;font-size: 60px;}.wp-block-post-date{color: #123456;}.wp-block-post-date a{background-color: #777;color: #555;}.wp-block-image{border-top-left-radius: 10px;border-bottom-right-radius: 1em;margin-bottom: 30px;}';
$presets = '.has-grey-color{color: var(--wp--preset--color--grey) !important;}.has-grey-background-color{background-color: var(--wp--preset--color--grey) !important;}.has-grey-border-color{border-color: var(--wp--preset--color--grey) !important;}.has-small-font-family{font-family: var(--wp--preset--font-family--small) !important;}.has-big-font-family{font-family: var(--wp--preset--font-family--big) !important;}';
$all = $variables . $styles . $presets;
$this->assertEquals( $all, $theme_json->get_stylesheet() );
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