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Formatting: Treat math elements as block-level elements.

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The `math` element can be displayed either as a block or inline element. If `wpautop` only treats it as an inline element, it will break multiline elements by inserting `br` elements. Treating the element as a block element means that the editor won't break common normative usages of the `math` element. 

Prevent `math` elements from having internal elements split up with `br` elements, disrupting formatting.

Props nicholaswilson, wojtek.szkutnik, hakre, conner_bw, ericlewis, hughie.molloy, SteelWagstaff, ryokuhi, joedolson, bgoewert, adamsilverstein, joedolson.
Fixes #13340.

git-svn-id: https://develop.svn.wordpress.org/trunk@55272 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Joe Dolson
2023-02-07 16:16:47 +00:00
parent d49951361c
commit 67f101e791
2 changed files with 59 additions and 3 deletions
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4
src/wp-includes/formatting.php
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@@ -480,7 +480,7 @@ function wpautop( $text, $br = true ) {
// Change multiple <br>'s into two line breaks, which will turn into paragraphs.
$text = preg_replace( '|<br\s*/?>\s*<br\s*/?>|', "\n\n", $text );
$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
// Add a double line break above block-level opening tags.
$text = preg_replace( '!(<' . $allblocks . '[\s/>])!', "\n\n$1", $text );
@@ -568,7 +568,7 @@ function wpautop( $text, $br = true ) {
// Optionally insert line breaks.
if ( $br ) {
// Replace newlines that shouldn't be touched with a placeholder.
$text = preg_replace_callback( '/<(script|style|svg).*?<\/\\1>/s', '_autop_newline_preservation_helper', $text );
$text = preg_replace_callback( '/<(script|style|svg|math).*?<\/\\1>/s', '_autop_newline_preservation_helper', $text );
// Normalize <br>
$text = str_replace( array( '<br>', '<br/>' ), '<br />', $text );