HTML API: Support INPUT tags.

Adds support for the following HTML elements to the HTML Processor:

 - INPUT

Previously this element was not supported and the HTML Processor would bail when encountering one. Now, with this patch applied, it will proceed to parse the HTML document.

Developed in #5907
Discussed in https://core.trac.wordpress.org/ticket/60283

Props jonsurrell
See #60283



git-svn-id: https://develop.svn.wordpress.org/trunk@57343 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/html-api/class-wp-html-processor.php

@@ -101,18 +101,18 @@
  *
  *  - Containers: ADDRESS, BLOCKQUOTE, DETAILS, DIALOG, DIV, FOOTER, HEADER, MAIN, MENU, SPAN, SUMMARY.
  *  - Custom elements: All custom elements are supported. :)
- *  - Form elements: BUTTON, DATALIST, FIELDSET, LABEL, LEGEND, METER, PROGRESS, SEARCH.
+ *  - Form elements: BUTTON, DATALIST, FIELDSET, INPUT, LABEL, LEGEND, METER, PROGRESS, SEARCH.
  *  - Formatting elements: B, BIG, CODE, EM, FONT, I, PRE, SMALL, STRIKE, STRONG, TT, U, WBR.
  *  - Heading elements: H1, H2, H3, H4, H5, H6, HGROUP.
  *  - Links: A.
- *  - Lists: DD, DL, DT, LI, OL, LI.
- *  - Media elements: AUDIO, CANVAS, EMBED, FIGCAPTION, FIGURE, IMG, MAP, PARAM, PICTURE, SOURCE, VIDEO, TRACK.
+ *  - Lists: DD, DL, DT, LI, OL, UL.
+ *  - Media elements: AUDIO, CANVAS, EMBED, FIGCAPTION, FIGURE, IMG, MAP, PICTURE, SOURCE, TRACK, VIDEO.
  *  - Paragraph: BR, P.
- *  - Phrasing elements: AREA, ABBR, BDI, BDO, CITE, DATA, DEL, DFN, INS, MARK, OUTPUT, Q, SAMP, SUB, SUP, TIME, VAR.
+ *  - Phrasing elements: ABBR, AREA, BDI, BDO, CITE, DATA, DEL, DFN, INS, MARK, OUTPUT, Q, SAMP, SUB, SUP, TIME, VAR.
  *  - Sectioning elements: ARTICLE, ASIDE, HR, NAV, SECTION.
  *  - Templating elements: SLOT.
  *  - Text decoration: RUBY.
- *  - Deprecated elements: ACRONYM, BLINK, CENTER, DIR, ISINDEX, KEYGEN, LISTING, MULTICOL, NEXTID, SPACER.
+ *  - Deprecated elements: ACRONYM, BLINK, CENTER, DIR, ISINDEX, KEYGEN, LISTING, MULTICOL, NEXTID, PARAM, SPACER.
  *
  * ### Supported markup
  *
@@ -972,6 +972,23 @@ private function step_in_body() {
 				$this->state->frameset_ok = false;
 				return true;
 
+			/*
+			 * > A start tag whose tag name is "input"
+			 */
+			case '+INPUT':
+				$this->reconstruct_active_formatting_elements();
+				$this->insert_html_element( $this->state->current_token );
+				$type_attribute = $this->get_attribute( 'type' );
+				/*
+				 * > If the token does not have an attribute with the name "type", or if it does,
+				 * > but that attribute's value is not an ASCII case-insensitive match for the
+				 * > string "hidden", then: set the frameset-ok flag to "not ok".
+				 */
+				if ( ! is_string( $type_attribute ) || 'hidden' !== strtolower( $type_attribute ) ) {
+					$this->state->frameset_ok = false;
+				}
+				return true;
+
 			/*
 			 * > A start tag whose tag name is "hr"
 			 */
@@ -1024,7 +1041,6 @@ private function step_in_body() {
 			case 'HEAD':
 			case 'HTML':
 			case 'IFRAME':
-			case 'INPUT':
 			case 'LINK':
 			case 'MARQUEE':
 			case 'MATH':

tests/phpunit/tests/html-api/wpHtmlProcessor.php

@@ -253,7 +253,6 @@ public function data_unsupported_special_in_body_tags() {
 			'HEAD'      => array( 'HEAD' ),
 			'HTML'      => array( 'HTML' ),
 			'IFRAME'    => array( 'IFRAME' ),
-			'INPUT'     => array( 'INPUT' ),
 			'LINK'      => array( 'LINK' ),
 			'MARQUEE'   => array( 'MARQUEE' ),
 			'MATH'      => array( 'MATH' ),

tests/phpunit/tests/html-api/wpHtmlProcessorBreadcrumbs.php

@@ -180,7 +180,6 @@ public function data_unsupported_elements() {
 			'HEAD',
 			'HTML',
 			'IFRAME',
-			'INPUT',
 			'LINK',
 			'MARQUEE', // Deprecated.
 			'MATH',