feat: add getIcon method

Closes #22

Author: sentialx

README.md

@@ -170,3 +170,9 @@ Returns [`Window`](#class-window)
 
 - `win` [Window](#class-window) | number | null
   - pass null to unset window owner.
+
+#### win.getIcon(size: number) `Windows` `macOS`
+
+- `size` number - can be only `16`, `32`, `64`, `256`. By default it's `64`.
+
+Returns a png Buffer

example.js

@@ -22,6 +22,7 @@ console.log("[info]: Visible Windows List");
 windowManager.getWindows().forEach(window => {
    if (window.isVisible()) {
       console.log(window.getInfo());
+      console.log(window.getIcon());
       window.bringToTop();
    }
 });

package-lock.json

@@ -35,7 +35,8 @@
     "typescript": "3.7.3"
   },
   "dependencies": {
+    "extract-file-icon": "^0.3.2",
     "node-addon-api": "2.0.0",
     "node-gyp": "6.0.1"
   }
-}
+}

package.json

@@ -1,5 +1,6 @@
 import { platform } from "os";
 import { windowManager } from "..";
+import extractFileIcon from 'extract-file-icon';
 
 let addon: any;
 
@@ -166,6 +167,10 @@ export class Window {
     return this.getInfo().opacity;
   }
 
+  getIcon(size: 16 | 32 | 64 | 256 = 64) {
+    return extractFileIcon(this.path, size);
+  }
+
   setOwner(window: Window | null | number) {
     if (!addon || platform() !== "win32") return;