src/x11/reparent.cpp

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