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
  31 #ifndef WX_PRECOMP
  32     #include "wx/log.h"
  33     #include "wx/app.h"
  34     #include "wx/timer.h"
  35 #endif
  36
  37 #include "wx/evtloop.h"
  38
  39 #include "wx/x11/private.h"
  40 #include "X11/Xatom.h"
  41
  42 #include "wx/generic/private/timer.h"
  43
  44 /*
  45  * wxAdoptedWindow
  46  */
  47
  48 wxAdoptedWindow::wxAdoptedWindow()
  49 {
  50 }
  51
  52 wxAdoptedWindow::wxAdoptedWindow(WXWindow window)
  53 {
  54     m_mainWindow = window;
  55 }
  56
  57 wxAdoptedWindow::~wxAdoptedWindow()
  58 {
  59 }
  60
  61 /*
  62  * wxReparenter
  63  */
  64
  65 static bool Xerror;
  66 static Atom WM_STATE = 0;
  67 bool wxReparenter::sm_done = false;
  68 wxAdoptedWindow* wxReparenter::sm_toReparent = NULL;
  69 wxWindow* wxReparenter::sm_newParent = NULL;
  70 wxString wxReparenter::sm_name;
  71 bool wxReparenter::sm_exactMatch = false;
  72
  73 static int ErrorHandler(Display* WXUNUSED(dpy), XErrorEvent* WXUNUSED(event))
  74 {
  75     Xerror = True;
  76     return False;
  77 }
  78
  79 // We assume that toReparent has had its X window set
  80 // appropriately.
  81 bool wxReparenter::Reparent(wxWindow* newParent, wxAdoptedWindow* toReparent)
  82 {
  83     XWindowAttributes xwa;
  84     Window *children;
  85     unsigned int numchildren, each;
  86     Window returnroot, returnparent;
  87     XErrorHandler old;
  88     int parentOffset = 0;
  89
  90     old = XSetErrorHandler(ErrorHandler);
  91     XReparentWindow( wxGlobalDisplay(),
  92                      (Window) toReparent->GetMainWindow(),
  93                      (Window) newParent->GetMainWindow(),
  94                      0, 0);
  95
  96     if (!XQueryTree( wxGlobalDisplay(),
  97                      (Window) toReparent->GetMainWindow(),
  98                      &returnroot, &returnparent,
  99                      &children, &numchildren) || Xerror)
 100     {
 101         XSetErrorHandler(old);
 102         return true;
 103     }
 104
 105     if (numchildren > 0)
 106     {
 107         // TEST: see if we can get away with reparenting just
 108         // first one
 109         if (numchildren > 1)
 110         {
 111             wxLogDebug(wxT("Found %d, but only reparenting 1 child."), numchildren);
 112             numchildren = 1;
 113         }
 114         wxLogDebug(wxT("Reparenting %d children."), numchildren);
 115         /* Stacking order is preserved since XQueryTree returns its children in
 116            bottommost to topmost order
 117          */
 118         for (each=0; each<numchildren; each++)
 119         {
 120             XGetWindowAttributes( wxGlobalDisplay(),
 121                                   children[each], &xwa);
 122             fprintf(stderr,
 123               "Reparenting child at offset %d and position %d, %d.\n",
 124                parentOffset, parentOffset+xwa.x, parentOffset+xwa.y);
 125             XReparentWindow( wxGlobalDisplay(),
 126                              children[each], (Window) newParent->GetMainWindow(),
 127                              xwa.x, xwa.y);
 128         }
 129     }
 130
 131     XSetErrorHandler(old);
 132     return true;
 133 }
 134
 135 // Wait for an appropriate window to be created.
 136 // If exactMatch is false, a substring match is OK.
 137 // If windowName is empty, then wait for the next overrideRedirect window.
 138 bool wxReparenter::WaitAndReparent(wxWindow* newParent, wxAdoptedWindow* toReparent,
 139                                    const wxString& windowName,
 140                                    bool exactMatch)
 141 {
 142     sm_newParent = newParent;
 143     sm_toReparent = toReparent;
 144     sm_exactMatch = exactMatch;
 145     sm_name = windowName;
 146
 147     Display* display = wxGlobalDisplay();
 148     XSelectInput(display,
 149         RootWindowOfScreen(DefaultScreenOfDisplay(display)),
 150         SubstructureNotifyMask);
 151
 152     if (!WM_STATE)
 153         WM_STATE = XInternAtom(display, "WM_STATE", False);
 154
 155 #ifdef __WXDEBUG__
 156     if (!windowName.empty())
 157         wxLogDebug(_T("Waiting for window %s"), windowName.c_str());
 158 #endif
 159
 160     sm_done = false;
 161
 162     wxEventLoop eventLoop;
 163     while (!sm_done)
 164     {
 165         if (eventLoop.Pending())
 166         {
 167             XEvent xevent;
 168             XNextEvent(display, & xevent);
 169             if (!wxTheApp->ProcessXEvent((WXEvent*) & xevent))
 170             {
 171                 // Do the local event processing
 172                 ProcessXEvent((WXEvent*) & xevent);
 173             }
 174         }
 175         else
 176         {
 177 #if wxUSE_TIMER
 178             wxGenericTimerImpl::NotifyTimers();
 179             wxTheApp->ProcessIdle();
 180 #endif
 181         }
 182     }
 183     return true;
 184 }
 185
 186 bool wxReparenter::ProcessXEvent(WXEvent* event)
 187 {
 188     XEvent* xevent = (XEvent*) event;
 189     Window client;
 190
 191     if (!sm_done)
 192     {
 193         if (xevent->type == MapNotify)
 194         {
 195             wxLogDebug(_T("Window was mapped"));
 196         }
 197
 198         if (xevent->type == MapNotify && !xevent->xmap.override_redirect &&
 199             (client = (Window) FindAClientWindow((WXWindow) xevent->xmap.window, sm_name)))
 200         {
 201             wxLogDebug(_T("Found a client window, about to reparent"));
 202             wxASSERT(sm_toReparent->GetParent() == NULL);
 203
 204             sm_toReparent->SetHandle((WXWindow) client);
 205             sm_newParent->AddChild(sm_toReparent);
 206             sm_done = Reparent(sm_newParent, sm_toReparent);
 207             return sm_done;
 208         } else if (xevent->type == MapNotify &&
 209                    xevent->xmap.override_redirect &&
 210                    xevent->xmap.window)
 211         {
 212             wxLogDebug(_T("Found an override redirect window, about to reparent"));
 213             sm_toReparent->SetHandle((WXWindow) xevent->xmap.window);
 214             sm_newParent->AddChild(sm_toReparent);
 215             wxASSERT(sm_toReparent->GetParent() == NULL);
 216
 217             sm_done = Reparent(sm_newParent, sm_toReparent);
 218             return sm_done;
 219         }
 220     }
 221     return false;
 222 }
 223
 224 WXWindow wxReparenter::FindAClientWindow(WXWindow window, const wxString& name)
 225 {
 226     int rvalue, i;
 227     Atom actualtype;
 228     int actualformat;
 229     unsigned long nitems, bytesafter;
 230     unsigned char *propreturn;
 231     Window *children;
 232     unsigned int numchildren;
 233     Window returnroot, returnparent;
 234     Window result = 0;
 235     XErrorHandler old;
 236     char *clientName;
 237
 238     Xerror = False;
 239     old = XSetErrorHandler(ErrorHandler);
 240     rvalue = XGetWindowProperty((Display*) wxGetDisplay(),
 241         (Window) window, WM_STATE,
 242         0, 1, False,
 243         AnyPropertyType, &actualtype, &actualformat,
 244         &nitems, &bytesafter, &propreturn);
 245
 246     XSetErrorHandler(old);
 247
 248     if (!Xerror && rvalue == Success && actualtype != None)
 249     {
 250         if (rvalue == Success)
 251         {
 252             XFree((char *) propreturn);
 253         }
 254         XFetchName((Display*) wxGetDisplay(), (Window) window, &clientName);
 255
 256         wxString str1(name);
 257         wxString str2 = wxString::FromAscii(clientName);
 258         str1.Lower();
 259         str2.Lower();
 260
 261         bool matches;
 262         if (sm_exactMatch)
 263             matches = (name == wxString::FromAscii(clientName));
 264         else
 265             matches = (str1.Contains(str2) || str2.Contains(str1));
 266
 267         XFree(clientName);
 268
 269         if (matches)
 270             return (WXWindow) window;
 271         else
 272             return NULL;
 273     }
 274
 275     old = XSetErrorHandler(ErrorHandler);
 276     if (!XQueryTree((Display*) wxGetDisplay(), (Window) window, &returnroot, &returnparent,
 277         &children, &numchildren) || Xerror)
 278     {
 279         XSetErrorHandler(old);
 280         return NULL;
 281     }
 282     XSetErrorHandler(old);
 283
 284     result = 0;
 285     for (i=0; i<(int)numchildren && !result ;i++) {
 286         result = (Window) FindAClientWindow((WXWindow) children[i], name);
 287     }
 288     if (numchildren) {
 289         XFree((char *) children);
 290     } return (WXWindow) result;
 291 }
 292
 293 #endif // !wxUSE_NANOX