Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

apps/desktop/electron/hud-drag.ts

@@ -0,0 +1,37 @@
+/**
+ * HUD composer-drag geometry — where to park the window so it stays under the
+ * OS cursor, including across monitors.
+ *
+ * Renderer PointerEvent screen coordinates are CSS pixels. Electron's
+ * `screen.getCursorScreenPoint()` and `BrowserWindow` bounds are DIP. An
+ * absolute grab offset sampled in main stays 1:1 across mixed-DPI displays,
+ * even if the last setBounds was clamped to the previous monitor.
+ */
+
+export interface HudDragPoint {
+  x: number
+  y: number
+}
+
+export function createHudDragSession() {
+  let offset: HudDragPoint | null = null
+
+  return {
+    begin(cursor: HudDragPoint, windowOrigin: HudDragPoint) {
+      offset = { x: cursor.x - windowOrigin.x, y: cursor.y - windowOrigin.y }
+    },
+    origin(cursor: HudDragPoint): HudDragPoint | null {
+      if (!offset) {
+        return null
+      }
+
+      return {
+        x: Math.round(cursor.x - offset.x),
+        y: Math.round(cursor.y - offset.y)
+      }
+    },
+    end() {
+      offset = null
+    }
+  }
+}