Lens restructure (#540)

Signed-off-by: Roman <ixrock@gmail.com>

types/font-face.d.ts

@@ -0,0 +1,44 @@
+// https://www.w3.org/TR/css-font-loading/
+// https://developer.mozilla.org/en-US/docs/Web/API/FontFace
+export {}
+
+declare global {
+  const FontFace: FontFace;
+
+  interface Document {
+    fonts: FontFaceSet
+  }
+
+  type CSSOMString = string;
+  type FontFaceLoadStatus = 'unloaded' | 'loading' | 'loaded' | 'error';
+  type FontFaceSetStatus = 'loading' | 'loaded';
+
+  interface FontFace extends FontFaceDescriptors {
+    new(family: string, source: string | ArrayBuffer, descriptors?: FontFaceDescriptors): FontFace;
+    readonly status: FontFaceLoadStatus;
+    readonly loaded: Promise<FontFace>;
+    variationSettings: CSSOMString;
+    display: CSSOMString;
+    load(): Promise<FontFace>;
+  }
+
+  interface FontFaceDescriptors {
+    family: CSSOMString;
+    style: CSSOMString;
+    weight: CSSOMString;
+    stretch: CSSOMString;
+    unicodeRange: CSSOMString;
+    variant: CSSOMString;
+    featureSettings: CSSOMString;
+  }
+
+  interface FontFaceSet extends Iterable<FontFace> {
+    readonly status: FontFaceSetStatus;
+    readonly ready: Promise<FontFaceSet>;
+    add(font: FontFace): void;
+    check(font: string, text?: string): Boolean; // might not work, throws exception
+    load(font: string, text?: string): Promise<FontFace[]>
+    delete(font: FontFace): void;
+    clear(): void;
+  }
+}