M src/Ewmh.cc → src/Ewmh.cc

@@ -606,6 +606,10 @@ typedef vector<unsigned int> StateVec;
 
     StateVec state;
 
+    if (win.isMaximizedHorz())
+        state.push_back(m_net_wm_state_maximized_horz);
+    if (win.isMaximizedVert())
+        state.push_back(m_net_wm_state_maximized_vert);
     if (win.isStuck())
         state.push_back(m_net_wm_state_sticky);
     if (win.isShaded())

M src/Window.hh → src/Window.hh

@@ -342,6 +342,8 @@ inline bool isShaded() { return shaded; }
     inline bool isShaded() const { return shaded; }
     inline bool isFullscreen() const { return fullscreen; }
     inline bool isMaximized() const { return maximized == MAX_FULL; }
+    inline bool isMaximizedVert() const { return (bool)(maximized & MAX_VERT); }
+    inline bool isMaximizedHorz() const { return (bool)(maximized & MAX_HORZ); }
     inline bool isIconifiable() const { return functions.iconify; }
     inline bool isMaximizable() const { return functions.maximize; }
     inline bool isResizable() const { return functions.resize; }