Fix #579: search box changed in Windows 10 1909

QuickLook.Native/QuickLook.Native32/HelperMethods.cpp

@@ -88,13 +88,41 @@ bool HelperMethods::IsListaryToolbarVisible()
  return found;
 }
 
+// Windows 10 1909 replaced the search box in the File Explorer by a UWP control.
+// gti.flags is always 0 for UWP applications.
+bool HelperMethods::IsSearchBoxFocused()
+{
+ WCHAR wClassBuffer[MAX_PATH] = { '\0' };
+ if (FAILED(GetClassName(GetForegroundWindow(), wClassBuffer, MAX_PATH)))
+ return false;
+
+ if (wcscmp(wClassBuffer, L"ExploreWClass") != 0 && wcscmp(wClassBuffer, L"CabinetWClass") != 0)
+ return false;
+
+ auto* hwnd = GetFocusedControl();
+
+ WCHAR classBuffer[MAX_PATH] = { '\0' };
+ if (FAILED(GetClassName(hwnd, classBuffer, MAX_PATH)))
+ return false;
+
+ if (wcscmp(classBuffer, L"Windows.UI.Core.CoreWindow") != 0)
+ return false;
+
+ WCHAR textBuffer[MAX_PATH] = { '\0' };
+ if (FAILED(GetWindowText(hwnd, textBuffer, MAX_PATH)))
+ return false;
+
+ return wcscmp(textBuffer, L"Cortana") == 0;
+}
+
 bool HelperMethods::IsCursorActivated(HWND hwnd)
 {
  auto tId = GetWindowThreadProcessId(hwnd, nullptr);
 
- GUITHREADINFO gui = {sizeof gui};
- GetGUIThreadInfo(tId, &gui);
- return gui.flags || gui.hwndCaret || IsListaryToolbarVisible();
+ GUITHREADINFO gti = { sizeof gti };
+ GetGUIThreadInfo(tId, &gti);
+
+ return gti.flags || gti.hwndCaret || IsSearchBoxFocused() || IsListaryToolbarVisible();
 }
 
 bool HelperMethods::IsUWP()
@@ -108,3 +136,17 @@ bool HelperMethods::IsUWP()
  UINT32 pn = 0;
  return pGCPFN(&pn, nullptr) == ERROR_INSUFFICIENT_BUFFER;
 }
+
+HWND HelperMethods::GetFocusedControl()
+{
+ auto tid = GetWindowThreadProcessId(GetForegroundWindow(), nullptr);
+
+ if (0 == AttachThreadInput(GetCurrentThreadId(), tid, TRUE))
+ return nullptr;
+
+ auto* hwnd = GetFocus();
+
+ AttachThreadInput(GetCurrentThreadId(), tid, FALSE);
+
+ return hwnd;
+}

QuickLook.Native/QuickLook.Native32/HelperMethods.h

@@ -26,4 +26,6 @@ class HelperMethods
 
 private:
  static bool IsListaryToolbarVisible();
+ static bool IsSearchBoxFocused();
+ static HWND GetFocusedControl();
 };