Add support for kFractionsType Issue Rightpoint#243

EthanSchatzline · Feb 19, 2017 · bf75178 · bf75178
1 parent 617c35a
commit bf75178
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diff --git a/Example-iOS/DemoStrings.swift b/Example-iOS/DemoStrings.swift
@@ -306,6 +306,26 @@ enum DemoStrings {
         )
     }()
 
+    // Demonstrate fractions.
+    static let fractionsExample: NSAttributedString = {
+
+        let systemFontStyle = StringStyle(
+            .font(.systemFont(ofSize: 24)),
+            .adapt(.body)
+        )
+
+        let string = "\n1336 <fraction>6/10</fraction> + <fraction>4/10</fraction> = 1337"
+        return NSAttributedString.composed(of: [
+            "Fractions".styled(with: systemFontStyle, .smallCaps(.fromLowercase), .color(.raizlabsRed)),
+            string.styled(with: systemFontStyle.byAdding(
+                .xmlRules([
+                    .style("fraction", systemFontStyle.byAdding(.numberCase(.fraction))),
+                    ])
+                )
+            ),
+        ])
+    }()
+
     // Demonstrate scientific inferiors.
     static let scientificInferiorsExample: NSAttributedString = {
 

diff --git a/Example-iOS/StyleViewController.swift b/Example-iOS/StyleViewController.swift
@@ -32,6 +32,7 @@ class StyleViewController: UITableViewController {
             DemoStrings.ordinalsExample,
             DemoStrings.scientificInferiorsExample,
             DemoStrings.stylisticAlternatesExample,
+            DemoStrings.fractionsExample,
             ]),
         ("Accessibility Speech", DemoStrings.accessibilitySpeechExamples),
     ]

diff --git a/Sources/FontFeatures.swift b/Sources/FontFeatures.swift
@@ -61,12 +61,19 @@
         /// which drop below the typographic baseline.
         case lower
 
+        /// Fractions, when written on paper, are written on one line
+        /// with the numerator diagonally above and to the left of the
+        /// demoninator, with the slash ("/") between them.
+        case fraction
+
         public func featureSettings() -> [(type: Int, selector: Int)] {
             switch self {
             case .upper:
                 return [(type: kNumberCaseType, selector: kUpperCaseNumbersSelector)]
             case .lower:
                 return [(type: kNumberCaseType, selector: kLowerCaseNumbersSelector)]
+            case .fraction:
+                return [(type: kFractionsType, selector: kDiagonalFractionsSelector)]
             }
         }