Use an Xcb::Window for Client::wrapper

The Xcb::Window nicely encapsulates the created wrapper window. As
almost all code is adjusted, the variable is also renamed to
m_wrapper to follow the normal naming scheme.

client.cpp

@@ -90,7 +90,7 @@ bool Client::s_haveResizeEffect = false;
 Client::Client()
     : Toplevel()
     , client(None)
-    , wrapper(None)
+    , m_wrapper()
     , decoration(NULL)
     , bridge(new Bridge(this))
     , m_activityUpdatesBlocked(false)
@@ -233,7 +233,7 @@ Client::~Client()
 #endif
     assert(!moveResizeMode);
     assert(client == None);
-    assert(wrapper == None);
+    assert(m_wrapper == XCB_WINDOW_NONE);
     //assert( frameId() == None );
     assert(decoration == NULL);
     assert(block_geometry_updates == 0);
@@ -303,8 +303,7 @@ void Client::releaseWindow(bool on_shutdown)
         // may do map+unmap before we initially map the window by calling rawShow() from manage().
         XUnmapWindow(display(), client);
     client = None;
-    XDestroyWindow(display(), wrapper);
+    m_wrapper.reset();
-    wrapper = None;
     XDestroyWindow(display(), frameId());
     //frame = None;
     --block_geometry_updates; // Don't use GeometryUpdatesBlocker, it would now set the geometry
@@ -345,8 +344,7 @@ void Client::destroyClient()
     cleanGrouping();
     workspace()->removeClient(this);
     client = None; // invalidate
-    XDestroyWindow(display(), wrapper);
+    m_wrapper.reset();
-    wrapper = None;
     XDestroyWindow(display(), frameId());
     //frame = None;
     --block_geometry_updates; // Don't use GeometryUpdatesBlocker, it would now set the geometry
@@ -981,10 +979,10 @@ void Client::setShade(ShadeMode mode)
         shade_geometry_change = true;
         QSize s(sizeForClientSize(QSize(clientSize())));
         s.setHeight(border_top + border_bottom);
-        XSelectInput(display(), wrapper, ClientWinMask);   // Avoid getting UnmapNotify
+        XSelectInput(display(), m_wrapper, ClientWinMask);   // Avoid getting UnmapNotify
-        XUnmapWindow(display(), wrapper);
+        m_wrapper.unmap();
         XUnmapWindow(display(), client);
-        XSelectInput(display(), wrapper, ClientWinMask | SubstructureNotifyMask);
+        XSelectInput(display(), m_wrapper, ClientWinMask | SubstructureNotifyMask);
         exportMappingState(IconicState);
         plainResize(s);
         shade_geometry_change = false;
@@ -1208,7 +1206,7 @@ void Client::map()
         decoration->widget()->show(); // Not really necessary, but let it know the state
     XMapWindow(display(), frameId());
     if (!isShade()) {
-        XMapWindow(display(), wrapper);
+        m_wrapper.map();
         XMapWindow(display(), client);
         m_decoInputExtent.map();
         exportMappingState(NormalState);
@@ -1227,12 +1225,12 @@ void Client::unmap()
     // which won't be missed, so this shouldn't be a problem. The chance the real UnmapNotify
     // will be missed is also very minimal, so I don't think it's needed to grab the server
     // here.
-    XSelectInput(display(), wrapper, ClientWinMask);   // Avoid getting UnmapNotify
+    XSelectInput(display(), m_wrapper, ClientWinMask);   // Avoid getting UnmapNotify
     XUnmapWindow(display(), frameId());
-    XUnmapWindow(display(), wrapper);
+    m_wrapper.unmap();
     XUnmapWindow(display(), client);
     m_decoInputExtent.unmap();
-    XSelectInput(display(), wrapper, ClientWinMask | SubstructureNotifyMask);
+    XSelectInput(display(), m_wrapper, ClientWinMask | SubstructureNotifyMask);
     if (decoration != NULL)
         decoration->widget()->hide(); // Not really necessary, but let it know the state
     exportMappingState(IconicState);

client.h

@@ -270,7 +270,7 @@ class Client
     Q_PROPERTY(bool decorationHasAlpha READ decorationHasAlpha)
 public:
     explicit Client();
-    Window wrapperId() const;
+    xcb_window_t wrapperId() const;
     Window decorationId() const;
     xcb_window_t inputId() const { return m_decoInputExtent; }
 
@@ -833,7 +833,7 @@ private:
     bool tabTo(Client *other, bool behind, bool activate);
 
     Window client;
-    Window wrapper;
+    Xcb::Window m_wrapper;
     KDecoration* decoration;
     Bridge* bridge;
     int desk;
@@ -1011,9 +1011,9 @@ private:
     Client* cl;
 };
 
-inline Window Client::wrapperId() const
+inline xcb_window_t Client::wrapperId() const
 {
-    return wrapper;
+    return m_wrapper;
 }
 
 inline Window Client::decorationId() const

events.cpp

@@ -591,7 +591,7 @@ void Client::unmapNotifyEvent(XUnmapEvent* e)
     // but just destroy the client
     Xcb::Tree tree(client);
     xcb_window_t daddy = tree.parent();
-    if (daddy == wrapper) {
+    if (daddy == m_wrapper) {
         releaseWindow(); // unmapped from a regular client state
     } else {
         destroyClient(); // the client was moved to some other parent

manage.cpp

@@ -630,7 +630,7 @@ void Client::embedClient(Window w, const XWindowAttributes& attr)
 {
     assert(client == None);
     assert(frameId() == None);
-    assert(wrapper == None);
+    assert(m_wrapper == XCB_WINDOW_NONE);
     client = w;
 
     const xcb_visualid_t visualid = XVisualIDFromVisual(attr.visual);
@@ -681,17 +681,18 @@ void Client::embedClient(Window w, const XWindowAttributes& attr)
     setWindowHandles(client, frame);
 
     // Create the wrapper window
-    wrapper = xcb_generate_id(conn);
+    xcb_window_t wrapperId = xcb_generate_id(conn);
-    xcb_create_window(conn, attr.depth, wrapper, frame, 0, 0, 1, 1, 0,
+    xcb_create_window(conn, attr.depth, wrapperId, frame, 0, 0, 1, 1, 0,
                       XCB_WINDOW_CLASS_INPUT_OUTPUT, visualid, cw_mask, cw_values);
+    m_wrapper.reset(wrapperId);
 
-    xcb_reparent_window(conn, client, wrapper, 0, 0);
+    xcb_reparent_window(conn, client, m_wrapper, 0, 0);
 
     // We could specify the event masks when we create the windows, but the original
     // Xlib code didn't.  Let's preserve that behavior here for now so we don't end up
     // receiving any unexpected events from the wrapper creation or the reparenting.
     xcb_change_window_attributes(conn, frame,   XCB_CW_EVENT_MASK, &frame_event_mask);
-    xcb_change_window_attributes(conn, wrapper, XCB_CW_EVENT_MASK, &wrapper_event_mask);
+    xcb_change_window_attributes(conn, m_wrapper, XCB_CW_EVENT_MASK, &wrapper_event_mask);
     xcb_change_window_attributes(conn, client,  XCB_CW_EVENT_MASK, &client_event_mask);
 
     updateMouseGrab();