migrate to typescript

src/core/font.ts

@@ -0,0 +1,30 @@
+export class FontSize {
+    private static readonly allInstances: FontSize[] = [];
+
+    public static readonly Small = new FontSize(0, 'font-size-small');
+    public static readonly Default = new FontSize(1, 'font-size-default');
+    public static readonly Large = new FontSize(2, 'font-size-large');
+    public static readonly XLarge = new FontSize(3, 'font-size-x-large');
+    public static readonly XXLarge = new FontSize(4, 'font-size-xx-large');
+    public static readonly XXXLarge = new FontSize(5, 'font-size-xxx-large');
+    public static readonly XXXXLarge = new FontSize(6, 'font-size-xxxx-large');
+
+    public static readonly MinimumFontSize = FontSize.Small;
+    public static readonly MaximumFontSize = FontSize.XXXXLarge;
+
+    public readonly type: number;
+    public readonly className: string;
+
+    private constructor(type: number, className: string) {
+        this.type = type;
+        this.className = className;
+
+        FontSize.allInstances.push(this);
+    }
+
+    public static values(): FontSize[] {
+        return FontSize.allInstances;
+    }
+}
+
+export const FONT_SIZE_PREVIEW_CLASSNAME_PREFIX: string = 'preview-';