From 0a9130b6c76bafb553e954feafa197897e6ecbdd Mon Sep 17 00:00:00 2001
From: Dana Jansens <danakj@orodu.net>
Date: Fri, 12 Jul 2002 00:40:05 +0000
Subject: [PATCH] now we know the state of windows

---
 util/epist/process.cc | 20 ++++++++++++++++----
 util/epist/window.cc  | 27 +++++++++++++++++++++++++++
 util/epist/window.hh  |  2 ++
 3 files changed, 45 insertions(+), 4 deletions(-)

diff --git a/util/epist/process.cc b/util/epist/process.cc
index dab1f16d..95588963 100644
--- a/util/epist/process.cc
+++ b/util/epist/process.cc
@@ -41,10 +41,22 @@ WindowList::iterator _active = _clients.end();
 void processEvent(const XEvent &e) {
   switch (e.type) {
   case PropertyNotify:
-    if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
-      updateActiveWindow();
-    if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list))
-      updateClientList();
+    if (e.xany.window == _root) {
+      // root window
+      if (e.xproperty.atom == _xatom->getAtom(XAtom::net_active_window))
+        updateActiveWindow();
+      if (e.xproperty.atom == _xatom->getAtom(XAtom::net_client_list))
+        updateClientList();
+    } else {
+      // a client window
+      WindowList::iterator it, end = _clients.end();
+      for (it = _clients.begin(); it != end; ++it)
+        if (*it == e.xproperty.window)
+          break;
+      assert(it != end);  // this means a client somehow got removed from the
+                          // list!
+      it->updateState();
+    }
     break;
   }
 }
diff --git a/util/epist/window.cc b/util/epist/window.cc
index ebe458d4..a366fc49 100644
--- a/util/epist/window.cc
+++ b/util/epist/window.cc
@@ -25,13 +25,40 @@
 #endif // HAVE_CONFIG_H
 
 #include "window.hh"
+#include "epist.hh"
+#include "../../src/XAtom.hh"
 
 
 XWindow::XWindow(Window window) : _window(window) {
+  XSelectInput(_display, _window, PropertyChangeMask);
+  updateState();
 }
 
 
 XWindow::~XWindow() {
+  XSelectInput(_display, _window, None);
 }
 
 
+void XWindow::updateState() {
+  // set the defaults
+  _shaded = _iconic = _max_vert = _max_horz = false;
+  
+  unsigned long num = (unsigned) -1;
+  Atom *state;
+  if (! _xatom->getValue(_window, XAtom::net_wm_state, XAtom::atom,
+                         num, &state))
+    return;
+  for (unsigned long i = 0; i < num; ++i) {
+    if (state[i] == _xatom->getAtom(XAtom::net_wm_state_maximized_vert))
+      _max_vert = true;
+    if (state[i] == _xatom->getAtom(XAtom::net_wm_state_maximized_horz))
+      _max_horz = true;
+    if (state[i] == _xatom->getAtom(XAtom::net_wm_state_shaded))
+      _shaded = true;
+    if (state[i] == _xatom->getAtom(XAtom::net_wm_state_hidden))
+      _iconic = true;
+  }
+
+  delete [] state;
+}
diff --git a/util/epist/window.hh b/util/epist/window.hh
index 01cb2a80..140d63bc 100644
--- a/util/epist/window.hh
+++ b/util/epist/window.hh
@@ -53,6 +53,8 @@ public:
   inline bool maxVert() const { return _max_vert; }
   inline bool maxHorz() const { return _max_horz; }
 
+  void updateState();
+
   bool operator == (const XWindow &w) const { return w._window == _window; }
   bool operator == (const Window &w) const { return w == _window; }
 };
-- 
2.39.2