[Glitch] Add ability to dismiss alt text badge by tapping it in web UI

Port 796187c1e8 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/hooks/useSelectableClick.ts

@@ -0,0 +1,55 @@
+import { useRef, useCallback } from 'react';
+
+type Position = [number, number];
+
+export const useSelectableClick = (
+  onClick: React.MouseEventHandler,
+  maxDelta = 5,
+) => {
+  const clickPositionRef = useRef<Position | null>(null);
+
+  const handleMouseDown = useCallback((e: React.MouseEvent) => {
+    clickPositionRef.current = [e.clientX, e.clientY];
+  }, []);
+
+  const handleMouseUp = useCallback(
+    (e: React.MouseEvent) => {
+      if (!clickPositionRef.current) {
+        return;
+      }
+
+      const [startX, startY] = clickPositionRef.current;
+      const [deltaX, deltaY] = [
+        Math.abs(e.clientX - startX),
+        Math.abs(e.clientY - startY),
+      ];
+
+      let element: EventTarget | null = e.target;
+
+      while (element && element instanceof HTMLElement) {
+        if (
+          element.localName === 'button' ||
+          element.localName === 'a' ||
+          element.localName === 'label'
+        ) {
+          return;
+        }
+
+        element = element.parentNode;
+      }
+
+      if (
+        deltaX + deltaY < maxDelta &&
+        (e.button === 0 || e.button === 1) &&
+        e.detail >= 1
+      ) {
+        onClick(e);
+      }
+
+      clickPositionRef.current = null;
+    },
+    [maxDelta, onClick],
+  );
+
+  return [handleMouseDown, handleMouseUp] as const;
+};