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HTML API: Update documentation and rename internal variable on HTML Processor

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This patch updates documentation and an internal variable name within the
HTML Processor class so that they are more helpful and complete to a reader.

There should be no functional or visual changes in this patch.

Props dmsnell, mukesh27.
Fixes #59267.
Built from https://develop.svn.wordpress.org/trunk@56565


git-svn-id: http://core.svn.wordpress.org/trunk@56077 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Bernhard Reiter 2023-09-13 13:02:17 +00:00
parent deaa431a90
commit 15c3f036fd
2 changed files with 77 additions and 29 deletions
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104
wp-includes/html-api/class-wp-html-processor.php
View File

@ -27,6 +27,7 @@
* - Unwrapping a tag by removing its parent.
* - Inserting and removing nodes.
* - Reading and changing inner content.
* - Navigating up or around HTML structure.
*
* ## Usage
*
@ -66,7 +67,7 @@
* `array( 'IMG' )` matches all IMG elements and `array( 'P', 'IMG' )`
* matches all IMG elements directly inside a P element. To ensure that no
* partial matches erroneously match it's possible to specify in a query
* the full breadcrumb match.
* the full breadcrumb match all the way down from the root HTML element.
*
* Example:
*
@ -76,7 +77,7 @@
*
* $html = '<figure><img><figcaption>A <em>lovely</em> day outside</figcaption></figure>';
* // ---- Matches here.
* $processor->next_tag( array( 'breadcrumbs' => array( 'FIGURE', 'IMG', 'FIGCAPTION', 'EM' ) ) );
* $processor->next_tag( array( 'breadcrumbs' => array( 'FIGURE', 'FIGCAPTION', 'EM' ) ) );
*
* $html = '<div><img></div><img>';
* // ----- Matches here, because IMG must be a direct child of the implicit BODY.
@ -100,7 +101,8 @@
*
* - Links: A.
* - The formatting elements: B, BIG, CODE, EM, FONT, I, SMALL, STRIKE, STRONG, TT, U.
* - Containers: DIV, FIGCAPTION, FIGURE.
* - Containers: DIV, FIGCAPTION, FIGURE, SPAN.
* - Form elements: BUTTON.
* - Paragraph: P.
* - Void elements: IMG.
*
@ -116,7 +118,9 @@
* - Markup involving only those tags listed above.
* - Fully-balanced and non-overlapping tags.
* - HTML with unexpected tag closers.
* - Some unbalanced or overlapping tags.
* - P tags after unclosed P tags.
* - BUTTON tags after unclosed BUTTON tags.
* - A tags after unclosed A tags that don't involve any active formatting elements.
*
* @since 6.4.0
@ -126,7 +130,10 @@
*/
class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* HTML processing requires more bookmarks than basic tag processing.
* The maximum number of bookmarks allowed to exist at any given time.
*
* HTML processing requires more bookmarks than basic tag processing,
* so this class constant from the Tag Processor is overwritten.
*
* @since 6.4.0
*
@ -137,6 +144,8 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* Static query for instructing the Tag Processor to visit every token.
*
* @access private
*
* @since 6.4.0
*
* @var array
@ -158,8 +167,15 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* Used to create unique bookmark names.
*
* This class sets a bookmark for every tag in the HTML document that it encounters.
* The bookmark name is auto-generated and increments, starting with `1`. These are
* internal bookmarks and are automatically released when the referring WP_HTML_Token
* goes out of scope and is garbage-collected.
*
* @since 6.4.0
*
* @see WP_HTML_Processor::$release_internal_bookmark_on_destruct
*
* @var int
*/
private $bookmark_counter = 0;
@ -186,7 +202,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
*
* @var closure
*/
private $release_internal_bookmark = null;
private $release_internal_bookmark_on_destruct = null;
/*
* Public Interface Functions
@ -258,10 +274,14 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* Constructor.
*
* Do not use this method. Use the static creator methods instead.
*
* @access private
*
* @since 6.4.0
*
* @see WP_HTML_Processor::createFragment()
*
* @param string $html HTML to process.
* @param string|null $use_the_static_create_methods_instead This constructor should not be called manually.
*/
@ -287,7 +307,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
* a private method into WP_HTML_Token classes without
* exposing it to any public API.
*/
$this->release_internal_bookmark = function ( $name ) {
$this->release_internal_bookmark_on_destruct = function ( $name ) {
parent::release_bookmark( $name );
};
}
@ -298,13 +318,15 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
* Various situations lead to parsing failure but this class will
* return `false` in all those cases. To determine why something
* failed it's possible to request the last error. This can be
* helpful to know if it's possible to fix something or to give up.
* helpful to know to distinguish whether a given tag couldn't
* be found or if content in the document caused the processor
* to give up and abort processing.
*
* Example
*
* $p = WP_HTML_Processor::createFragment( '<template><strong><button><em><p><em>' );
* false === $p->next_tag();
* WP_HTML_Processor::ERROR_UNSUPPORTED === $p->get_last_error();
* $processor = WP_HTML_Processor::createFragment( '<template><strong><button><em><p><em>' );
* false === $processor->next_tag();
* WP_HTML_Processor::ERROR_UNSUPPORTED === $processor->get_last_error();
*
* @since 6.4.0
*
@ -429,6 +451,20 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
}
if ( self::PROCESS_NEXT_NODE === $node_to_process ) {
/*
* Void elements still hop onto the stack of open elements even though
* there's no corresponding closing tag. This is important for managing
* stack-based operations such as "navigate to parent node" or checking
* on an element's breadcrumbs.
*
* When moving on to the next node, therefore, if the bottom-most element
* on the stack is a void element, it must be closed.
*
* @TODO: Once self-closing foreign elements and BGSOUND are supported,
* they must also be implicitly closed here too. BGSOUND is
* special since it's only self-closing if the self-closing flag
* is provided in the opening tag, otherwise it expects a tag closer.
*/
$top_node = $this->state->stack_of_open_elements->current_node();
if ( $top_node && self::is_void( $top_node->node_name ) ) {
$this->state->stack_of_open_elements->pop();
@ -446,7 +482,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
$this->bookmark_tag(),
$this->get_tag(),
$this->is_tag_closer(),
$this->release_internal_bookmark
$this->release_internal_bookmark_on_destruct
);
try {
@ -456,7 +492,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
default:
$this->last_error = self::ERROR_UNSUPPORTED;
throw new WP_HTML_Unsupported_Exception( 'Cannot parse outside of the IN BODY insertion mode.' );
throw new WP_HTML_Unsupported_Exception( "No support for parsing in the '{$this->state->insertion_mode}' state." );
}
} catch ( WP_HTML_Unsupported_Exception $e ) {
/*
@ -470,17 +506,22 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* Computes the HTML breadcrumbs for the currently-matched node, if matched.
*
* Breadcrumbs start at the outer-most parent and descend toward the matched element.
* Breadcrumbs start at the outermost parent and descend toward the matched element.
* They always include the entire path from the root HTML node to the matched element.
*
* @TODO: It could be more efficient to expose a generator-based version of this function
* to avoid creating the array copy on tag iteration. If this is done, it would likely
* be more useful to walk up the stack when yielding instead of starting at the top.
*
* Example
*
* $p = WP_HTML_Processor::createFragment( '<p><strong><em><img></em></strong></p>' );
* $p->next_tag( 'IMG' );
* $p->get_breadcrumbs() === array( 'HTML', 'BODY', 'P', 'STRONG', 'EM', 'IMG' );
* $processor = WP_HTML_Processor::createFragment( '<p><strong><em><img></em></strong></p>' );
* $processor->next_tag( 'IMG' );
* $processor->get_breadcrumbs() === array( 'HTML', 'BODY', 'P', 'STRONG', 'EM', 'IMG' );
*
* @since 6.4.0
*
* @return string[]|null Array of tag-names representing path to matched node, if matched, otherwise null.
* @return string[]|null Array of tag names representing path to matched node, if matched, otherwise NULL.
*/
public function get_breadcrumbs() {
if ( ! $this->get_tag() ) {
@ -499,16 +540,14 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
* Parses next element in the 'in body' insertion mode.
*
* This internal function performs the 'in body' insertion mode
* logic for the generalized `self::step()` function.
*
* @access private
* logic for the generalized WP_HTML_Processor::step() function.
*
* @since 6.4.0
*
* @throws WP_HTML_Unsupported_Exception When encountering unsupported HTML input.
*
* @see https://html.spec.whatwg.org/#parsing-main-inbody
* @see self::step
* @see WP_HTML_Processor::step
*
* @return bool Whether an element was found.
*/
@ -698,7 +737,7 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
*/
/**
* Creates a new bookmark for the currently-matched tag and returns generated name.
* Creates a new bookmark for the currently-matched tag and returns the generated name.
*
* @since 6.4.0
*
@ -726,14 +765,19 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
/**
* Returns the uppercase name of the matched tag.
*
* The semantic rules for HTML specify that certain tags be reprocessed
* with a different tag name. Because of this, the tag name presented
* by the HTML Processor may differ from the one reported by the HTML
* Tag Processor, which doesn't apply these semantic rules.
*
* Example:
*
* $p = new WP_HTML_Tag_Processor( '<div class="test">Test</div>' );
* $p->next_tag() === true;
* $p->get_tag() === 'DIV';
* $processor = new WP_HTML_Tag_Processor( '<div class="test">Test</div>' );
* $processor->next_tag() === true;
* $processor->get_tag() === 'DIV';
*
* $p->next_tag() === false;
* $p->get_tag() === null;
* $processor->next_tag() === false;
* $processor->get_tag() === null;
*
* @since 6.4.0
*
@ -775,11 +819,13 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
}
/**
* Moves the internal cursor in the Tag Processor to a given bookmark's location.
* Moves the internal cursor in the HTML Processor to a given bookmark's location.
*
* In order to prevent accidental infinite loops, there's a
* maximum limit on the number of times seek() can be called.
*
* @throws Exception When unable to allocate a bookmark for the next token in the input HTML document.
*
* @since 6.4.0
*
* @param string $bookmark_name Jump to the place in the document identified by this bookmark name.
@ -1348,6 +1394,8 @@ class WP_HTML_Processor extends WP_HTML_Tag_Processor {
*
* This unlock code is used to ensure that anyone calling the constructor is
* doing so with a full understanding that it's intended to be a private API.
*
* @access private
*/
const CONSTRUCTOR_UNLOCK_CODE = 'Use WP_HTML_Processor::createFragment instead of calling the class constructor directly.';
}

2
wp-includes/version.php
View File

@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.4-alpha-56563';
$wp_version = '6.4-alpha-56565';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.