1 files changed, 75 insertions, 54 deletions
diff --git a/src/content/domains/Key.ts b/src/content/domains/Key.ts
index b25616e..669edfc 100644
--- a/src/content/domains/Key.ts
+++ b/src/content/domains/Key.ts
@@ -1,11 +1,3 @@
-export default interface Key {
-  key: string;
-  shiftKey?: boolean;
-  ctrlKey?: boolean;
-  altKey?: boolean;
-  metaKey?: boolean;
-}
-
 const modifiedKeyName = (name: string): string => {
   if (name === ' ') {
     return 'Space';
@@ -18,55 +10,84 @@ const modifiedKeyName = (name: string): string => {
   return name;
 };
 
-export const fromKeyboardEvent = (e: KeyboardEvent): Key => {
-  let key = modifiedKeyName(e.key);
-  let shift = e.shiftKey;
-  if (key.length === 1 && key.toUpperCase() === key.toLowerCase()) {
-    // make shift false for symbols to enable key bindings by symbold keys.
-    // But this limits key bindings by symbol keys with Shift (such as Shift+$>.
-    shift = false;
+export default class Key {
+  public readonly key: string;
+
+  public readonly shift: boolean;
+
+  public readonly ctrl: boolean;
+
+  public readonly alt: boolean;
+
+  public readonly meta: boolean;
+
+  constructor({ key, shift, ctrl, alt, meta }: {
+    key: string;
+    shift: boolean;
+    ctrl: boolean;
+    alt: boolean;
+    meta: boolean;
+  }) {
+    this.key = key;
+    this.shift = shift;
+    this.ctrl = ctrl;
+    this.alt = alt;
+    this.meta = meta;
   }
 
-  return {
-    key: modifiedKeyName(e.key),
-    shiftKey: shift,
-    ctrlKey: e.ctrlKey,
-    altKey: e.altKey,
-    metaKey: e.metaKey,
-  };
-};
+  static fromMapKey(str: string): Key {
+    if (str.startsWith('<') && str.endsWith('>')) {
+      let inner = str.slice(1, -1);
+      let shift = inner.includes('S-');
+      let base = inner.slice(inner.lastIndexOf('-') + 1);
+      if (shift && base.length === 1) {
+        base = base.toUpperCase();
+      } else if (!shift && base.length === 1) {
+        base = base.toLowerCase();
+      }
+      return new Key({
+        key: base,
+        shift: shift,
+        ctrl: inner.includes('C-'),
+        alt: inner.includes('A-'),
+        meta: inner.includes('M-'),
+      });
+    }
 
-export const fromMapKey = (key: string): Key => {
-  if (key.startsWith('<') && key.endsWith('>')) {
-    let inner = key.slice(1, -1);
-    let shift = inner.includes('S-');
-    let base = inner.slice(inner.lastIndexOf('-') + 1);
-    if (shift && base.length === 1) {
-      base = base.toUpperCase();
-    } else if (!shift && base.length === 1) {
-      base = base.toLowerCase();
+    return new Key({
+      key: str,
+      shift: str.toLowerCase() !== str,
+      ctrl: false,
+      alt: false,
+      meta: false,
+    });
+  }
+
+  static fromKeyboardEvent(e: KeyboardEvent): Key {
+    let key = modifiedKeyName(e.key);
+    let shift = e.shiftKey;
+    if (key.length === 1 && key.toUpperCase() === key.toLowerCase()) {
+      // make shift false for symbols to enable key bindings by symbold keys.
+      // But this limits key bindings by symbol keys with Shift
+      // (such as Shift+$>.
+      shift = false;
     }
-    return {
-      key: base,
-      shiftKey: inner.includes('S-'),
-      ctrlKey: inner.includes('C-'),
-      altKey: inner.includes('A-'),
-      metaKey: inner.includes('M-'),
-    };
+
+    return new Key({
+      key: modifiedKeyName(e.key),
+      shift: shift,
+      ctrl: e.ctrlKey,
+      alt: e.altKey,
+      meta: e.metaKey,
+    });
   }
-  return {
-    key: key,
-    shiftKey: key.toLowerCase() !== key,
-    ctrlKey: false,
-    altKey: false,
-    metaKey: false,
-  };
-};
 
-export const equals = (e1: Key, e2: Key): boolean => {
-  return e1.key === e2.key &&
-    e1.ctrlKey === e2.ctrlKey &&
-    e1.metaKey === e2.metaKey &&
-    e1.altKey === e2.altKey &&
-    e1.shiftKey === e2.shiftKey;
-};
+  equals(key: Key) {
+    return this.key === key.key &&
+        this.ctrl === key.ctrl &&
+        this.meta === key.meta &&
+        this.alt === key.alt &&
+        this.shift === key.shift;
+  }
+}
+