src/x11/reparent.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        reparent.cpp
   3 // Purpose:     wxWindow
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2002-03-09
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "reparent.h"
  22 #endif
  23
  24 #include "wx/setup.h"
  25
  26 #if !wxUSE_NANOX
  27
  28 #include "wx/x11/reparent.h"
  29 #include "wx/evtloop.h"
  30 #include "wx/log.h"
  31 #include "wx/app.h"
  32 #include "wx/timer.h"
  33
  34 #include "wx/x11/private.h"
  35 #include "X11/Xatom.h"
  36
  37 /*
  38  * wxAdoptedWindow
  39  */
  40
  41 wxAdoptedWindow::wxAdoptedWindow()
  42 {
  43 }
  44
  45 wxAdoptedWindow::wxAdoptedWindow(WXWindow window)
  46 {
  47     m_mainWindow = window;
  48 }
  49
  50 wxAdoptedWindow::~wxAdoptedWindow()
  51 {
  52 }
  53
  54 /*
  55  * wxReparenter
  56  */
  57
  58 static bool Xerror;
  59 static Atom WM_STATE = 0;
  60 bool wxReparenter::sm_done = FALSE;
  61 wxAdoptedWindow* wxReparenter::sm_toReparent = NULL;
  62 wxWindow* wxReparenter::sm_newParent = NULL;
  63 wxString wxReparenter::sm_name;
  64 bool wxReparenter::sm_exactMatch = FALSE;
  65
  66 static int ErrorHandler(Display* dpy, XErrorEvent* event)
  67 {
  68     Xerror = True;
  69     return False;
  70 }
  71
  72 // We assume that toReparent has had its X window set
  73 // appropriately.
  74 bool wxReparenter::Reparent(wxWindow* newParent, wxAdoptedWindow* toReparent)
  75 {
  76     XWindowAttributes xwa;
  77     Window *children;
  78     unsigned int numchildren, each;
  79     Window returnroot, returnparent;
  80     XErrorHandler old;
  81     int parentOffset = 0;
  82
  83     old = XSetErrorHandler(ErrorHandler);
  84     XReparentWindow( wxGlobalDisplay(),
  85                      (Window) toReparent->GetMainWindow(),
  86                      (Window) newParent->GetMainWindow(),
  87                      0, 0);
  88
  89     if (!XQueryTree( wxGlobalDisplay(),
  90                      (Window) toReparent->GetMainWindow(),
  91                      &returnroot, &returnparent,
  92                      &children, &numchildren) || Xerror)
  93     {
  94         XSetErrorHandler(old);
  95         return TRUE;
  96     }
  97
  98     if (numchildren > 0)
  99     {
 100         // TEST: see if we can get away with reparenting just
 101         // first one
 102         if (numchildren > 1)
 103         {
 104             wxLogDebug(wxT("Found %d, but only reparenting 1 child."), numchildren);
 105             numchildren = 1;
 106         }
 107         wxLogDebug(wxT("Reparenting %d children."), numchildren);
 108         /* Stacking order is preserved since XQueryTree returns its children in
 109            bottommost to topmost order
 110          */
 111         for (each=0; each<numchildren; each++)
 112         {
 113             XGetWindowAttributes( wxGlobalDisplay(),
 114                                   children[each], &xwa);
 115             fprintf(stderr,
 116               "Reparenting child at offset %d and position %d, %d.\n",
 117                parentOffset, parentOffset+xwa.x, parentOffset+xwa.y);
 118             XReparentWindow( wxGlobalDisplay(),
 119                              children[each], (Window) newParent->GetMainWindow(),
 120                              xwa.x, xwa.y);
 121         }
 122     }
 123
 124     XSetErrorHandler(old);
 125     return TRUE;
 126 }
 127
 128 // Wait for an appropriate window to be created.
 129 // If exactMatch is FALSE, a substring match is OK.
 130 // If windowName is empty, then wait for the next overrideRedirect window.
 131 bool wxReparenter::WaitAndReparent(wxWindow* newParent, wxAdoptedWindow* toReparent,
 132                                    const wxString& windowName,
 133                                    bool exactMatch)
 134 {
 135     sm_newParent = newParent;
 136     sm_toReparent = toReparent;
 137     sm_exactMatch = exactMatch;
 138     sm_name = windowName;
 139
 140     Display* display = wxGlobalDisplay();
 141     XSelectInput(display,
 142         RootWindowOfScreen(DefaultScreenOfDisplay(display)),
 143         SubstructureNotifyMask);
 144
 145     if (!WM_STATE)
 146         WM_STATE = XInternAtom(display, "WM_STATE", False);
 147
 148 #ifdef __WXDEBUG__
 149     if (!windowName.IsEmpty())
 150         wxLogDebug(_T("Waiting for window %s"), windowName.c_str());
 151 #endif
 152
 153     sm_done = FALSE;
 154
 155     wxEventLoop eventLoop;
 156     while (!sm_done)
 157     {
 158         if (eventLoop.Pending())
 159         {
 160             XEvent xevent;
 161             XNextEvent(display, & xevent);
 162             if (!wxTheApp->ProcessXEvent((WXEvent*) & xevent))
 163             {
 164                 // Do the local event processing
 165                 ProcessXEvent((WXEvent*) & xevent);
 166             }
 167         }
 168         else
 169         {
 170 #if wxUSE_TIMER
 171             wxTimer::NotifyTimers();
 172             wxTheApp->ProcessIdle();
 173 #endif
 174         }
 175     }
 176     return TRUE;
 177 }
 178
 179 bool wxReparenter::ProcessXEvent(WXEvent* event)
 180 {
 181     XEvent* xevent = (XEvent*) event;
 182     Window client;
 183
 184     if (!sm_done)
 185     {
 186         if (xevent->type == MapNotify)
 187         {
 188             wxLogDebug(_T("Window was mapped"));
 189         }
 190
 191         if (xevent->type == MapNotify && !xevent->xmap.override_redirect &&
 192             (client = (Window) FindAClientWindow((WXWindow) xevent->xmap.window, sm_name)))
 193         {
 194             wxLogDebug(_T("Found a client window, about to reparent"));
 195             wxASSERT(sm_toReparent->GetParent() == NULL);
 196
 197             sm_toReparent->SetHandle((WXWindow) client);
 198             sm_newParent->AddChild(sm_toReparent);
 199             sm_done = Reparent(sm_newParent, sm_toReparent);
 200             return sm_done;
 201         } else if (xevent->type == MapNotify &&
 202                    xevent->xmap.override_redirect &&
 203                    xevent->xmap.window)
 204         {
 205             wxLogDebug(_T("Found an override redirect window, about to reparent"));
 206             sm_toReparent->SetHandle((WXWindow) xevent->xmap.window);
 207             sm_newParent->AddChild(sm_toReparent);
 208             wxASSERT(sm_toReparent->GetParent() == NULL);
 209
 210             sm_done = Reparent(sm_newParent, sm_toReparent);
 211             return sm_done;
 212         }
 213     }
 214     return FALSE;
 215 }
 216
 217 WXWindow wxReparenter::FindAClientWindow(WXWindow window, const wxString& name)
 218 {
 219     int rvalue, i;
 220     Atom actualtype;
 221     int actualformat;
 222     unsigned long nitems, bytesafter;
 223     unsigned char *propreturn;
 224     Window *children;
 225     unsigned int numchildren;
 226     Window returnroot, returnparent;
 227     Window result = 0;
 228     XErrorHandler old;
 229     char *clientName;
 230
 231     Xerror = False;
 232     old = XSetErrorHandler(ErrorHandler);
 233     rvalue = XGetWindowProperty((Display*) wxGetDisplay(),
 234         (Window) window, WM_STATE,
 235         0, 1, False,
 236         AnyPropertyType, &actualtype, &actualformat,
 237         &nitems, &bytesafter, &propreturn);
 238
 239     XSetErrorHandler(old);
 240
 241     if (!Xerror && rvalue == Success && actualtype != None)
 242     {
 243         if (rvalue == Success)
 244         {
 245             XFree((char *) propreturn);
 246         }
 247         XFetchName((Display*) wxGetDisplay(), (Window) window, &clientName);
 248
 249         wxString str1(name);
 250         wxString str2 = wxString::FromAscii(clientName);
 251         str1.Lower();
 252         str2.Lower();
 253
 254         bool matches;
 255         if (sm_exactMatch)
 256             matches = (name == wxString::FromAscii(clientName));
 257         else
 258             matches = (str1.Contains(str2) || str2.Contains(str1));
 259
 260         XFree(clientName);
 261
 262         if (matches)
 263             return (WXWindow) window;
 264         else
 265             return NULL;
 266     }
 267
 268     old = XSetErrorHandler(ErrorHandler);
 269     if (!XQueryTree((Display*) wxGetDisplay(), (Window) window, &returnroot, &returnparent,
 270         &children, &numchildren) || Xerror)
 271     {
 272         XSetErrorHandler(old);
 273         return NULL;
 274     }
 275     XSetErrorHandler(old);
 276
 277     result = 0;
 278     for (i=0; i<(int)numchildren && !result ;i++) {
 279         result = (Window) FindAClientWindow((WXWindow) children[i], name);
 280     }
 281     if (numchildren) {
 282         XFree((char *) children);
 283     } return (WXWindow) result;
 284 }
 285
 286 #endif