Fix mathcal in chrome

* map to unicode chars

Bug: T352536
Change-Id: Iab04043df5cc04484d348b0c896a50c94ef79c16

src/WikiTexVC/MMLmappings/BaseParsing.php

@@ -202,7 +202,7 @@ class BaseParsing {
 
 		$menclose = new MMLmenclose( "", [ "notation" => $notation ] );
 		$inner = $menclose->encapsulateRaw(
-			$node->getArg2()->renderMML() ) . $mpAdded->encapsulateRaw( $node->getArg1()->renderMML() );
+				$node->getArg2()->renderMML() ) . $mpAdded->encapsulateRaw( $node->getArg1()->renderMML() );
 		return $mrow->encapsulateRaw( $msup->encapsulateRaw( $inner ) );
 	}
 
@@ -236,7 +236,7 @@ class BaseParsing {
 		$inner = $mrow->encapsulateRaw( $whatIsThis .
 				$mstyle->encapsulateRaw( $mrow->encapsulateRaw( $node->getArg1()->renderMML() ) ) ) .
 			$mrow->encapsulateRaw( $whatIsThis . $mstyle->encapsulateRaw(
-				$mrow->encapsulateRaw( $node->getArg2()->renderMML() ) ) );
+					$mrow->encapsulateRaw( $node->getArg2()->renderMML() ) ) );
 
 		return $mrow->encapsulateRaw( $mfrac->encapsulateRaw( $inner ) );
 	}
@@ -253,7 +253,7 @@ class BaseParsing {
 	}
 
 	public static function genFrac( $node, $passedArgs, $operatorContent, $name,
-							 $left = null, $right = null, $thick = null, $style = null ) {
+									$left = null, $right = null, $thick = null, $style = null ) {
 		// Actually this is in AMSMethods, consider refactoring  left, right, thick, style
 		$bm = new BaseMethods();
 		$ret = $bm->checkAndParseDelimiter( $name, $node, $passedArgs, $operatorContent, true );
@@ -527,14 +527,14 @@ class BaseParsing {
 				$mspace = new MMLmspace( "", [ "width" => "0px","height" => ".25em",
 					"depth" => "0px","mathbackground" => "black" ] );
 				return $mtext->encapsulateRaw( " " ) .
-						$mrowRel->encapsulateRaw( $mover->encapsulateRaw(
-						  $mrowOp->encapsulateRaw(
+					$mrowRel->encapsulateRaw( $mover->encapsulateRaw(
+						$mrowOp->encapsulateRaw(
 							$mrowOrd->encapsulateRaw( $mpadded->encapsulateRaw(
 								$mo->encapsulateRaw( "⟵" ) ) ) .
-						  $mspace->getEmpty() ) .
-						  $mrowOrd->encapsulateRaw(
-							  $mo->encapsulateRaw( "⟶" )
-						  ) ) );
+							$mspace->getEmpty() ) .
+						$mrowOrd->encapsulateRaw(
+							$mo->encapsulateRaw( "⟶" )
+						) ) );
 		}
 
 		// Removed all token based parsing, since macro resolution for the supported macros can be hardcoded in php
@@ -672,7 +672,7 @@ class BaseParsing {
 		if ( $node instanceof Fun2 ) {
 			return $start . $mfrac->encapsulateRaw( $mrow->encapsulateRaw(
 						$node->getArg1()->renderMML() ) . $mrow->encapsulateRaw( $node->getArg2()->renderMML() ) )
-						. $tail;
+				. $tail;
 		}
 		$inner = "";
 		foreach ( $node->getArgs() as $arg ) {
@@ -842,10 +842,16 @@ class BaseParsing {
 		$mrow = new MMLmrow( TexClass::ORD, [] );
 		$args = MMLParsingUtil::getFontArgs( $name, $mathvariant, $passedArgs );
 		$state = [];
+
+		// Unicode fixes for the operators
 		if ( $mathvariant == Variants::DOUBLESTRUCK ) {
-			// Unicode fix for the operators
 			$state = [ "double-struck-literals" => true ];
+		} elseif ( $mathvariant == Variants::CALLIGRAPHIC ) {
+			$state = [ "calligraphic" => true ];
+		} elseif ( $mathvariant == Variants::BOLDCALLIGRAPHIC ) {
+			$state = [ "bold-calligraphic" => true ];
 		}
+
 		if ( $node instanceof Fun1nb ) {
 			// Only one mrow from Fun1nb !?
 			return $mrow->encapsulateRaw( $node->getArg()->renderMML( $args, $state ) );
@@ -979,7 +985,7 @@ class BaseParsing {
 		}
 		$mrow = new MMLmrow( TexClass::ORD, [] );
 		$opParsed = ( $operatorContent != null && $operatorContent["limits"] )
-					? $operatorContent["limits"]->renderMML( $argsOp ) : "";
+			? $operatorContent["limits"]->renderMML( $argsOp ) : "";
 
 		if ( $node instanceof DQ ) {
 			$munder = new MMLmunder();
@@ -987,7 +993,7 @@ class BaseParsing {
 		} elseif ( $node instanceof FQ ) {
 			$munderOver = new MMLmunderover();
 			return $munderOver->encapsulateRaw( $opParsed . $mrow->encapsulateRaw( $node->getDown()->renderMML() )
-					. $mrow->encapsulateRaw( $node->getUp()->renderMML() ) );
+				. $mrow->encapsulateRaw( $node->getUp()->renderMML() ) );
 		}
 	}
 
@@ -1036,7 +1042,8 @@ class BaseParsing {
 			$end2 = $mrowEnd->encapsulateRaw( $operatorContent["sideset"]->getUp()->renderMML() );
 
 			return $mmlMrow->encapsulateRaw( $mmlMunderOver->encapsulateRaw( $mstyle->encapsulateRaw(
-				$mmlMultiscripts->encapsulateRaw( $opParsed . $in2 . "<mprescripts/>" . $in1 ) ) . $end1 . $end2 ) );
+					$mmlMultiscripts->encapsulateRaw( $opParsed . $in2 . "<mprescripts/>" . $in1 ) )
+				. $end1 . $end2 ) );
 		}
 
 		$merror = new MMLmerror();

src/WikiTexVC/MMLmappings/Util/MMLParsingUtil.php

@@ -126,9 +126,33 @@ class MMLParsingUtil {
 			'y' => '𝕪', 'z' => '𝕫'
 		];
 
-		// Replace each character in the input string with its double-struck Unicode equivalent
-		return preg_replace_callback( '/[A-Za-z0-9]/', static function ( $matches ) use ( $map ) {
-				return $map[$matches[0]] ?? $matches[0];
+		return self::matchAlphanumeric( $inputString, $map );
+	}
+
+	public static function mapToCaligraphicUnicode( $inputString ) {
+		$map = [
+			'0' => '𝟎', '1' => '𝟏', '2' => '𝟐', '3' => '𝟑', '4' => '𝟒',
+			'5' => '𝟓', '6' => '𝟔', '7' => '𝟕', '8' => '𝟖', '9' => '𝟗',
+			'A' => '𝒜', 'B' => 'ℬ', 'C' => '𝒞', 'D' => '𝒟', 'E' => 'ℰ',
+			'F' => 'ℱ', 'G' => '𝒢', 'H' => 'ℋ', 'I' => 'ℐ', 'J' => '𝒥',
+			'K' => '𝒦', 'L' => 'ℒ', 'M' => 'ℳ', 'N' => '𝒩', 'O' => '𝒪',
+			'P' => '𝒫', 'Q' => '𝒬', 'R' => 'ℛ', 'S' => '𝒮', 'T' => '𝒯',
+			'U' => '𝒰', 'V' => '𝒱', 'W' => '𝒲', 'X' => '𝒳', 'Y' => '𝒴',
+			'Z' => '𝒵', 'a' => '𝒶', 'b' => '𝒷', 'c' => '𝒸', 'd' => '𝒹',
+			'e' => 'ℯ', 'f' => '𝒻', 'g' => 'ℊ', 'h' => '𝒽', 'i' => '𝒾',
+			'j' => '𝒿', 'k' => '𝓀', 'l' => '𝓁', 'm' => '𝓂', 'n' => '𝓃',
+			'o' => 'ℴ', 'p' => '𝓅', 'q' => '𝓆', 'r' => '𝓇', 's' => '𝓈',
+			't' => '𝓉', 'u' => '𝓊', 'v' => '𝓋', 'w' => '𝓌', 'x' => '𝓍',
+			'y' => '𝓎', 'z' => '𝓏'
+		];
+
+		return self::matchAlphanumeric( $inputString, $map );
+	}
+
+	public static function matchAlphanumeric( $inputString, $map ) {
+		// Replace each character in the input string with its caligraphic Unicode equivalent
+		return preg_replace_callback( '/[A-Za-z0-9]/u', static function ( $matches ) use ( $map ) {
+			return $map[$matches[0]] ?? $matches[0];
 		}, $inputString );
 	}
 }

src/WikiTexVC/Nodes/Literal.php

@@ -30,12 +30,16 @@ class Literal extends TexNode {
 		array_push( $this->extendedLiterals,  '\\infty', '\\emptyset' );
 	}
 
-	public function changeInputDoubleStruckChars( $input, $state ) {
-		/** If it's definitely a literal, and it is double struck, map it to double-struck unicode
-		 * for correct rendering in Chrome, see https://phabricator.wikimedia.org/T352196
+	public function changeUnicodeFontInput( $input, $state ) {
+		/**
+		 * In some font modifications, it is required to explicitly use unicode
+		 * characters instead of (only) attributes in MathML to indicate the font.
+		 * This is mostly because of Chrome behaviour. I.e. see: https://phabricator.wikimedia.org/T352196
 		 */
 		if ( isset( $state["double-struck-literals"] ) ) {
 			return MMLParsingUtil::mapToDoubleStruckUnicode( $input );
+		} elseif ( isset( $state["calligraphic"] ) ) {
+			return MMLParsingUtil::mapToCaligraphicUnicode( $input );
 		}
 		return $input;
 	}
@@ -48,7 +52,7 @@ class Literal extends TexNode {
 		}
 		if ( is_numeric( $this->arg ) ) {
 			$mn = new MMLmn( "", $arguments );
-			return $mn->encapsulateRaw( $this->changeInputDoubleStruckChars( $this->arg, $state ) );
+			return $mn->encapsulateRaw( $this->changeUnicodeFontInput( $this->arg, $state ) );
 		}
 		// is important to split and find chars within curly and differentiate, see tc 459
 		$foundOperatorContent = MMLutil::initalParseLiteralExpression( $this->arg );
@@ -95,8 +99,8 @@ class Literal extends TexNode {
 
 		// Sieve for Makros
 		$ret = BaseMethods::checkAndParse( $inputP, $arguments,
-			 array_merge( $operatorContent ?? [], $state ?? [] ),
-			 $this, false );
+			array_merge( $operatorContent ?? [], $state ?? [] ),
+			$this, false );
 		if ( $ret ) {
 
 			return $ret;
@@ -114,7 +118,7 @@ class Literal extends TexNode {
 
 		// If falling through all sieves just create an MI element
 		$mi = new MMLmi( "", $arguments );
-		return $mi->encapsulateRaw( $this->changeInputDoubleStruckChars( $input, $state ) ); // $this->arg
+		return $mi->encapsulateRaw( $this->changeUnicodeFontInput( $input, $state ) ); // $this->arg
 	}
 
 	/**
@@ -162,7 +166,7 @@ class Literal extends TexNode {
 		if ( preg_match( $regexp, $s ) == 1 ) {
 			return [ $s ];
 		} elseif ( in_array( $s, $lit, true ) ) {
-			 return [ $s ];
+			return [ $s ];
 		} else {
 			return [];
 		}

tests/phpunit/unit/WikiTexVC/MMLRenderTest.php

@@ -15,6 +15,14 @@ use MediaWikiUnitTestCase;
  * @covers \MediaWiki\Extension\Math\WikiTexVC\TexVC
  */
 class MMLRenderTest extends MediaWikiUnitTestCase {
+	public function testMathCalUnicode() {
+		$input = "\\mathcal{O},  \\mathcal{K}, \\mathcal{t}, \\mathcal{c}";
+		$mathMLtexVC = $this->generateMML( $input );
+		$this->assertStringContainsString( '𝒪', $mathMLtexVC );
+		$this->assertStringContainsString( '𝒦', $mathMLtexVC );
+		$this->assertStringContainsString( '𝓉', $mathMLtexVC );
+		$this->assertStringContainsString( '𝒸', $mathMLtexVC );
+	}
 
 	public function testDoubleStruckLiteralUnicode() {
 		$input = "\\mathbb{Q},  \\R, \\Complex, \\mathbb{4}";