From 0ecfbfad53a79b9ac287a2cad3b7a1fe22e5a468 Mon Sep 17 00:00:00 2001
From: Bartosz Sosnowski <bzoz@users.noreply.github.com>
Date: Wed, 5 Feb 2020 12:31:35 +0100
Subject: [PATCH] FancyZones: filter out WM_POPUP windows if they dont have
 maximize/minimize button or a sizable frame (#1212)

This filters out TaskView and Win32 menus.
---
 src/common/hwnd_data_cache.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/common/hwnd_data_cache.cpp b/src/common/hwnd_data_cache.cpp
index fffb1f67e0..38f52aea25 100644
--- a/src/common/hwnd_data_cache.cpp
+++ b/src/common/hwnd_data_cache.cpp
@@ -80,6 +80,14 @@ bool HWNDDataCache::is_invalid_class(HWND hwnd) const {
 }
 bool HWNDDataCache::is_invalid_style(HWND hwnd) const {
   auto style = GetWindowLong(hwnd, GWL_STYLE);
+  // WS_POPUP need to have a border or minimize/maximize buttons,
+  // otherwise the window is "not interesting"
+  if ((style & WS_POPUP) == WS_POPUP &&
+      (style & WS_THICKFRAME) == 0 &&
+      (style & WS_MINIMIZEBOX) == 0 &&
+      (style & WS_MAXIMIZEBOX) == 0) {
+    return true;
+  }
   for (auto invalid : invalid_basic_styles) {
     if ((invalid & style) != 0) {
       return true;