properly revert focus when two windows close at the same time

ChangeLog

@@ -1,5 +1,8 @@
  (Format: Year/Month/Day)
 Changes for 1.0rc3:
+*06/07/20:
+   * Properly revert focus when two windows close simultaneously (Mark)
+     WinClient.cc/hh FbTk/FbWindow.hh fluxbox.cc Window.cc
 *06/07/19:
    * Preserve order of focused windows on restart (Mark)
      Workspace.cc Screen.cc FocusControl.cc/hh

src/FbTk/FbWindow.hh

@@ -137,7 +137,7 @@ public:
     }
     virtual void lower();
     virtual void raise();
-    void setInputFocus(int revert_to, int time);
+    virtual void setInputFocus(int revert_to, int time);
     /// defines a cursor for this window
     void setCursor(Cursor cur);
 #ifdef NOT_USED

src/WinClient.cc

@@ -66,6 +66,7 @@ WinClient::WinClient(Window win, BScreen &screen, FluxboxWindow *fbwin):FbTk::Fb
                      m_modal(0),
                      send_focus_message(false),
                      send_close_message(false),
+                     m_waiting_focus(false),
                      m_win_gravity(0),
                      m_title(""), m_icon_title(""),
                      m_class_name(""), m_instance_name(""),
@@ -188,6 +189,11 @@ bool WinClient::sendFocus() {
     return true;
 }
 
+void WinClient::setInputFocus(int revert_to, int time) {
+    FbTk::FbWindow::setInputFocus(revert_to, time);
+    m_waiting_focus = true;
+}
+
 void WinClient::sendClose(bool forceful) {
     if (forceful || !send_close_message)
         XKillClient(display(), window());

src/WinClient.hh

@@ -53,6 +53,9 @@ public:
     bool sendFocus(); // returns whether we sent a message or not 
                       // i.e. whether we assume the focus will get taken
     bool acceptsFocus() const; // will this window accept focus (according to hints)
+    void setInputFocus(int revert_to, int time);
+    inline bool isWaitingFocus() { return m_waiting_focus; }
+    void receivedFocus() { m_waiting_focus = false; m_focussig.notify(); }
     void sendClose(bool forceful = false);
     // not aware of anything that makes this false at present
     inline bool isClosable() const { return true; }
@@ -197,6 +200,7 @@ private:
     // or indicates that we are modal if don't have any transients
     int m_modal;
     bool send_focus_message, send_close_message;
+    bool m_waiting_focus;
 
     int m_win_gravity;
 

src/Window.cc

@@ -2112,7 +2112,7 @@ void FluxboxWindow::setFocusFlag(bool focus) {
     if (was_focused != focus) {
         m_focussig.notify();
         if (m_client)
-            m_client->focusSig().notify();
+            m_client->receivedFocus();
     }
 }
 

src/fluxbox.cc

@@ -1297,12 +1297,12 @@ void Fluxbox::update(FbTk::Subject *changedsub) {
 
         // This is where we revert focus on window close
         // NOWHERE ELSE!!!
-        if (FocusControl::focusedWindow() == &client)
+        if (FocusControl::focusedWindow() == &client) {
             FocusControl::unfocusWindow(client);
-
-        // failed to revert focus?
-        if (FocusControl::focusedWindow() == &client)
+            // make sure nothing else uses this window before focus reverts
             FocusControl::setFocusedWindow(0);
+        } else if (!FocusControl::focusedWindow() && client.isWaitingFocus())
+            FocusControl::revertFocus(screen);
     }
 }