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<title>[58926] trunk: HTML API: Add support for missing FRAMESET and "after" insertion modes.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/58926">58926</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/58926","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dmsnell</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-08-23 15:40:15 +0000 (Fri, 23 Aug 2024)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>HTML API: Add support for missing FRAMESET and "after" insertion modes.
As part of work to add more spec support to the HTML API, this patch adds support for the FRAMESET-related insertion modes, as well as the set of missing after insertion modes. These modes run at the end of parsing a document, closing it and taking care of any lingering tags.
Developed in https://github.com/wordpress/wordpress-develop/7165
Discussed in https://core.trac.wordpress.org/ticket/61576
Props dmsnell, jonsurrell.
See <a href="https://core.trac.wordpress.org/ticket/61576">#61576</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludeshtmlapiclasswphtmlprocessorphp">trunk/src/wp-includes/html-api/class-wp-html-processor.php</a></li>
<li><a href="#trunktestsphpunittestshtmlapiwpHtmlProcessorHtml5libphp">trunk/tests/phpunit/tests/html-api/wpHtmlProcessorHtml5lib.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludeshtmlapiclasswphtmlprocessorphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/html-api/class-wp-html-processor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/html-api/class-wp-html-processor.php 2024-08-23 14:53:59 UTC (rev 58925)
+++ trunk/src/wp-includes/html-api/class-wp-html-processor.php 2024-08-23 15:40:15 UTC (rev 58926)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3972,7 +3972,71 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool Whether an element was found.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> private function step_after_body(): bool {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->bail( 'No support for parsing in the ' . WP_HTML_Processor_State::INSERTION_MODE_AFTER_BODY . ' state.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $tag_name = $this->get_token_name();
+ $token_type = $this->get_token_type();
+ $op_sigil = '#tag' === $token_type ? ( $this->is_tag_closer() ? '-' : '+' ) : '';
+ $op = "{$op_sigil}{$tag_name}";
+
+ switch ( $op ) {
+ /*
+ * > A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
+ * > U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
+ *
+ * > Process the token using the rules for the "in body" insertion mode.
+ */
+ case '#text':
+ $text = $this->get_modifiable_text();
+ if ( strlen( $text ) === strspn( $text, " \t\n\f\r" ) ) {
+ return $this->step_in_body();
+ }
+ goto after_body_anything_else;
+ break;
+
+ /*
+ * > A comment token
+ */
+ case '#comment':
+ case '#funky-comment':
+ case '#presumptuous-tag':
+ $this->bail( 'Content outside of BODY is unsupported.' );
+ break;
+
+ /*
+ * > A DOCTYPE token
+ */
+ case 'html':
+ // Parse error: ignore the token.
+ return $this->step();
+
+ /*
+ * > A start tag whose tag name is "html"
+ */
+ case '+HTML':
+ return $this->step_in_body();
+
+ /*
+ * > An end tag whose tag name is "html"
+ *
+ * > If the parser was created as part of the HTML fragment parsing algorithm,
+ * > this is a parse error; ignore the token. (fragment case)
+ * >
+ * > Otherwise, switch the insertion mode to "after after body".
+ */
+ case '-HTML':
+ if ( isset( $this->context_node ) ) {
+ return $this->step();
+ }
+
+ $this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_AFTER_AFTER_BODY;
+ return true;
+ }
+
+ /*
+ * > Parse error. Switch the insertion mode to "in body" and reprocess the token.
+ */
+ after_body_anything_else:
+ $this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_IN_BODY;
+ return $this->step( self::REPROCESS_CURRENT_NODE );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3991,7 +4055,109 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool Whether an element was found.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> private function step_in_frameset(): bool {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->bail( 'No support for parsing in the ' . WP_HTML_Processor_State::INSERTION_MODE_IN_FRAMESET . ' state.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $tag_name = $this->get_token_name();
+ $token_type = $this->get_token_type();
+ $op_sigil = '#tag' === $token_type ? ( $this->is_tag_closer() ? '-' : '+' ) : '';
+ $op = "{$op_sigil}{$tag_name}";
+
+ switch ( $op ) {
+ /*
+ * > A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
+ * > U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
+ * >
+ * > Insert the character.
+ *
+ * This algorithm effectively strips non-whitespace characters from text and inserts
+ * them under HTML. This is not supported at this time.
+ */
+ case '#text':
+ $text = $this->get_modifiable_text();
+ $text = $this->get_modifiable_text();
+ if ( strlen( $text ) === strspn( $text, " \t\n\f\r" ) ) {
+ return $this->step_in_body();
+ }
+ $this->bail( 'Non-whitespace characters cannot be handled in frameset.' );
+ break;
+
+ /*
+ * > A comment token
+ */
+ case '#comment':
+ case '#funky-comment':
+ case '#presumptuous-tag':
+ $this->insert_html_element( $this->state->current_token );
+ return true;
+
+ /*
+ * > A DOCTYPE token
+ */
+ case 'html':
+ // Parse error: ignore the token.
+ return $this->step();
+
+ /*
+ * > A start tag whose tag name is "html"
+ */
+ case '+HTML':
+ return $this->step_in_body();
+
+ /*
+ * > A start tag whose tag name is "frameset"
+ */
+ case '+FRAMESET':
+ $this->insert_html_element( $this->state->current_token );
+ return true;
+
+ /*
+ * > An end tag whose tag name is "frameset"
+ */
+ case '-FRAMESET':
+ /*
+ * > If the current node is the root html element, then this is a parse error;
+ * > ignore the token. (fragment case)
+ */
+ if ( $this->state->stack_of_open_elements->current_node_is( 'HTML' ) ) {
+ return $this->step();
+ }
+
+ /*
+ * > Otherwise, pop the current node from the stack of open elements.
+ */
+ $this->state->stack_of_open_elements->pop();
+
+ /*
+ * > If the parser was not created as part of the HTML fragment parsing algorithm
+ * > (fragment case), and the current node is no longer a frameset element, then
+ * > switch the insertion mode to "after frameset".
+ */
+ if ( ! isset( $this->context_node ) && ! $this->state->stack_of_open_elements->current_node_is( 'FRAMESET' ) ) {
+ $this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_AFTER_FRAMESET;
+ }
+
+ return true;
+
+ /*
+ * > A start tag whose tag name is "frame"
+ *
+ * > Insert an HTML element for the token. Immediately pop the
+ * > current node off the stack of open elements.
+ * >
+ * > Acknowledge the token's self-closing flag, if it is set.
+ */
+ case '+FRAME':
+ $this->insert_html_element( $this->state->current_token );
+ $this->state->stack_of_open_elements->pop();
+ return true;
+
+ /*
+ * > A start tag whose tag name is "noframes"
+ */
+ case '+NOFRAMES':
+ return $this->step_in_head();
+ }
+
+ // Parse error: ignore the token.
+ return $this->step();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4010,7 +4176,67 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool Whether an element was found.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> private function step_after_frameset(): bool {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->bail( 'No support for parsing in the ' . WP_HTML_Processor_State::INSERTION_MODE_AFTER_FRAMESET . ' state.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $tag_name = $this->get_token_name();
+ $token_type = $this->get_token_type();
+ $op_sigil = '#tag' === $token_type ? ( $this->is_tag_closer() ? '-' : '+' ) : '';
+ $op = "{$op_sigil}{$tag_name}";
+
+ switch ( $op ) {
+ /*
+ * > A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
+ * > U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
+ * >
+ * > Insert the character.
+ *
+ * This algorithm effectively strips non-whitespace characters from text and inserts
+ * them under HTML. This is not supported at this time.
+ */
+ case '#text':
+ $text = $this->get_modifiable_text();
+ if ( strlen( $text ) === strspn( $text, " \t\n\f\r" ) ) {
+ return $this->step_in_body();
+ }
+ $this->bail( 'Non-whitespace characters cannot be handled in after frameset' );
+ break;
+
+ /*
+ * > A comment token
+ */
+ case '#comment':
+ case '#funky-comment':
+ case '#presumptuous-tag':
+ $this->insert_html_element( $this->state->current_token );
+ return true;
+
+ /*
+ * > A DOCTYPE token
+ */
+ case 'html':
+ // Parse error: ignore the token.
+ return $this->step();
+
+ /*
+ * > A start tag whose tag name is "html"
+ */
+ case '+HTML':
+ return $this->step_in_body();
+
+ /*
+ * > An end tag whose tag name is "html"
+ */
+ case '-HTML':
+ $this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_AFTER_AFTER_FRAMESET;
+ return true;
+
+ /*
+ * > A start tag whose tag name is "noframes"
+ */
+ case '+NOFRAMES':
+ return $this->step_in_head();
+ }
+
+ // Parse error: ignore the token.
+ return $this->step();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4029,7 +4255,52 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool Whether an element was found.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> private function step_after_after_body(): bool {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->bail( 'No support for parsing in the ' . WP_HTML_Processor_State::INSERTION_MODE_AFTER_AFTER_BODY . ' state.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $tag_name = $this->get_token_name();
+ $token_type = $this->get_token_type();
+ $op_sigil = '#tag' === $token_type ? ( $this->is_tag_closer() ? '-' : '+' ) : '';
+ $op = "{$op_sigil}{$tag_name}";
+
+ switch ( $op ) {
+ /*
+ * > A comment token
+ */
+ case '#comment':
+ case '#funky-comment':
+ case '#presumptuous-tag':
+ $this->bail( 'Content outside of HTML is unsupported.' );
+ break;
+
+ /*
+ * > A DOCTYPE token
+ * > A start tag whose tag name is "html"
+ *
+ * > Process the token using the rules for the "in body" insertion mode.
+ */
+ case 'html':
+ case '+HTML':
+ return $this->step_in_body();
+
+ /*
+ * > A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
+ * > U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
+ * >
+ * > Process the token using the rules for the "in body" insertion mode.
+ */
+ case '#text':
+ $text = $this->get_modifiable_text();
+ if ( strlen( $text ) === strspn( $text, " \t\n\f\r" ) ) {
+ return $this->step_in_body();
+ }
+ goto after_after_body_anything_else;
+ break;
+ }
+
+ /*
+ * > Parse error. Switch the insertion mode to "in body" and reprocess the token.
+ */
+ after_after_body_anything_else:
+ $this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_IN_BODY;
+ return $this->step( self::REPROCESS_CURRENT_NODE );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4048,7 +4319,57 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool Whether an element was found.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> private function step_after_after_frameset(): bool {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->bail( 'No support for parsing in the ' . WP_HTML_Processor_State::INSERTION_MODE_AFTER_AFTER_FRAMESET . ' state.' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $tag_name = $this->get_token_name();
+ $token_type = $this->get_token_type();
+ $op_sigil = '#tag' === $token_type ? ( $this->is_tag_closer() ? '-' : '+' ) : '';
+ $op = "{$op_sigil}{$tag_name}";
+
+ switch ( $op ) {
+ /*
+ * > A comment token
+ */
+ case '#comment':
+ case '#funky-comment':
+ case '#presumptuous-tag':
+ $this->bail( 'Content outside of HTML is unsupported.' );
+ break;
+
+ /*
+ * > A DOCTYPE token
+ * > A start tag whose tag name is "html"
+ *
+ * > Process the token using the rules for the "in body" insertion mode.
+ */
+ case 'html':
+ case '+HTML':
+ return $this->step_in_body();
+
+ /*
+ * > A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
+ * > U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
+ * >
+ * > Process the token using the rules for the "in body" insertion mode.
+ *
+ * This algorithm effectively strips non-whitespace characters from text and inserts
+ * them under HTML. This is not supported at this time.
+ */
+ case '#text':
+ $text = $this->get_modifiable_text();
+ if ( strlen( $text ) === strspn( $text, " \t\n\f\r" ) ) {
+ return $this->step_in_body();
+ }
+ $this->bail( 'Non-whitespace characters cannot be handled in after after frameset.' );
+ break;
+
+ /*
+ * > A start tag whose tag name is "noframes"
+ */
+ case '+NOFRAMES':
+ return $this->step_in_head();
+ }
+
+ // Parse error: ignore the token.
+ return $this->step();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4115,7 +4436,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> case '#cdata-section':
</span><span class="cx" style="display: block; padding: 0 10px"> case '#comment':
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- case '#funky_comment':
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ case '#funky-comment':
+ case '#presumptuous-tag':
</ins><span class="cx" style="display: block; padding: 0 10px"> $this->insert_foreign_element( $this->state->current_token, false );
</span><span class="cx" style="display: block; padding: 0 10px"> return true;
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre></div>
<a id="trunktestsphpunittestshtmlapiwpHtmlProcessorHtml5libphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/html-api/wpHtmlProcessorHtml5lib.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/html-api/wpHtmlProcessorHtml5lib.php 2024-08-23 14:53:59 UTC (rev 58925)
+++ trunk/tests/phpunit/tests/html-api/wpHtmlProcessorHtml5lib.php 2024-08-23 15:40:15 UTC (rev 58926)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -33,10 +33,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests1/line0692' => 'Bug: Mixed whitespace, non-whitespace text in head not split correctly',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests14/line0022' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests14/line0055' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'tests19/line0488' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
+ 'tests19/line0500' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</ins><span class="cx" style="display: block; padding: 0 10px"> 'tests19/line0965' => 'Bug: Mixed whitespace, non-whitespace text in head not split correctly.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests19/line1079' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests2/line0207' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests2/line0686' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'tests2/line0697' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</ins><span class="cx" style="display: block; padding: 0 10px"> 'tests2/line0709' => 'Unimplemented: This parser does not add missing attributes to existing HTML or BODY tags.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests5/line0013' => 'Bug: Mixed whitespace, non-whitespace text in head not split correctly.',
</span><span class="cx" style="display: block; padding: 0 10px"> 'tests5/line0077' => 'Bug: Mixed whitespace, non-whitespace text in head not split correctly.',
</span></span></pre>
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