1 files changed, 61 insertions, 0 deletions
diff --git a/src/shared/settings/Key.ts b/src/shared/settings/Key.ts
new file mode 100644
index 0000000..b11eeb2
--- /dev/null
+++ b/src/shared/settings/Key.ts
@@ -0,0 +1,61 @@
+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;
+  }
+
+  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-'),
+      });
+    }
+
+    return new Key({
+      key: str,
+      shift: str.toLowerCase() !== str,
+      ctrl: false,
+      alt: false,
+      meta: false,
+    });
+  }
+
+  equals(key: Key) {
+    return this.key === key.key &&
+      this.ctrl === key.ctrl &&
+      this.meta === key.meta &&
+      this.alt === key.alt &&
+      this.shift === key.shift;
+  }
+}