fixing overrelease and out-of-bounds write, fixes #13725

[wxWidgets.git] / src / common / toplvcmn.cpp

diff --git a/src/common/toplvcmn.cpp b/src/common/toplvcmn.cpp
index a24634f669a69df30f016989ad568fc96c57e663..e93cdc024f329c6186c16be7993f1f81c1065d0b 100644 (file)
--- a/src/common/toplvcmn.cpp
+++ b/src/common/toplvcmn.cpp
@@ -39,12 +39,8 @@
 BEGIN_EVENT_TABLE(wxTopLevelWindowBase, wxWindow)
     EVT_CLOSE(wxTopLevelWindowBase::OnCloseWindow)
     EVT_SIZE(wxTopLevelWindowBase::OnSize)
-    EVT_WINDOW_DESTROY(wxTopLevelWindowBase::OnChildDestroy)
-    WX_EVENT_TABLE_CONTROL_CONTAINER(wxTopLevelWindowBase)
 END_EVENT_TABLE()
 
-WX_DELEGATE_TO_CONTROL_CONTAINER(wxTopLevelWindowBase, wxWindow)
-
 // ============================================================================
 // implementation
 // ============================================================================
@@ -59,17 +55,10 @@ wxTopLevelWindowBase::wxTopLevelWindowBase()
 {
     // Unlike windows, top level windows are created hidden by default.
     m_isShown = false;
-    m_winDefault =
-    m_winTmpDefault = NULL;
-
-    WX_INIT_CONTROL_CONTAINER();
 }
 
 wxTopLevelWindowBase::~wxTopLevelWindowBase()
 {
-    m_winDefault =
-    m_winTmpDefault = NULL;
-
     // don't let wxTheApp keep any stale pointers to us
     if ( wxTheApp && wxTheApp->GetTopWindow() == this )
         wxTheApp->SetTopWindow(NULL);
@@ -129,7 +118,7 @@ bool wxTopLevelWindowBase::Destroy()
           i != end;
           ++i )
     {
-        wxTopLevelWindow * const win = wx_static_cast(wxTopLevelWindow *, *i);
+        wxTopLevelWindow * const win = static_cast<wxTopLevelWindow *>(*i);
         if ( win != this && win->IsShown() )
         {
             // there remains at least one other visible TLW, we can hide this
@@ -156,7 +145,7 @@ bool wxTopLevelWindowBase::IsLastBeforeExit() const
     // then decide whether we should exit at all
     for ( i = wxTopLevelWindows.begin(); i != end; ++i )
     {
-        wxTopLevelWindow * const win = wx_static_cast(wxTopLevelWindow *, *i);
+        wxTopLevelWindow * const win = static_cast<wxTopLevelWindow *>(*i);
         if ( win->ShouldPreventAppExit() )
         {
             // there remains at least one important TLW, don't exit
@@ -168,7 +157,7 @@ bool wxTopLevelWindowBase::IsLastBeforeExit() const
     for ( i = wxTopLevelWindows.begin(); i != end; ++i )
     {
         // don't close twice the windows which are already marked for deletion
-        wxTopLevelWindow * const win = wx_static_cast(wxTopLevelWindow *, *i);
+        wxTopLevelWindow * const win = static_cast<wxTopLevelWindow *>(*i);
         if ( !wxPendingDelete.Member(win) && !win->Close() )
         {
             // one of the windows refused to close, don't exit
@@ -208,7 +197,7 @@ void wxTopLevelWindowBase::GetRectForTopLevelChildren(int *x, int *y, int *w, in
 wxSize wxTopLevelWindowBase::GetDefaultSize()
 {
     wxSize size = wxGetClientDisplayRect().GetSize();
-
+#ifndef __WXOSX_IPHONE__
     // create proportionally bigger windows on small screens
     if ( size.x >= 1024 )
         size.x = 400;
@@ -224,7 +213,7 @@ wxSize wxTopLevelWindowBase::GetDefaultSize()
         size.y *= 2;
         size.y /= 3;
     }
-
+#endif
     return size;
 }
 
@@ -232,7 +221,10 @@ void wxTopLevelWindowBase::DoCentre(int dir)
 {
     // on some platforms centering top level windows is impossible
     // because they are always maximized by guidelines or limitations
-    if(IsAlwaysMaximized())
+    //
+    // and centering a maximized window doesn't make sense as its position
+    // can't change
+    if ( IsAlwaysMaximized() || IsMaximized() )
         return;
 
     // we need the display rect anyhow so store it first: notice that we should
@@ -254,25 +246,19 @@ void wxTopLevelWindowBase::DoCentre(int dir)
         // parent frame under Mac but could happen elsewhere too if the frame
         // was hidden/moved away for some reason), don't use it as otherwise
         // this window wouldn't be visible at all
-        if ( !rectDisplay.Contains(rectParent.GetTopLeft()) &&
-                !rectParent.Contains(rectParent.GetBottomRight()) )
+        if ( !rectParent.Intersects(rectDisplay) )
         {
-            // this is enough to make IsEmpty() test below pass
-            rectParent.width = 0;
+            // just centre on screen then
+            rectParent = rectDisplay;
         }
     }
-
-    if ( rectParent.IsEmpty() )
+    else
     {
         // we were explicitly asked to centre this window on the entire screen
         // or if we have no parent anyhow and so can't centre on it
         rectParent = rectDisplay;
     }
 
-    // centering maximized window on screen is no-op
-    if((rectParent == rectDisplay) && IsMaximized())
-        return;
-
     if ( !(dir & wxBOTH) )
         dir |= wxBOTH; // if neither is specified, center in both directions
 
@@ -361,7 +347,7 @@ void wxTopLevelWindowBase::SetIcon(const wxIcon& icon)
     // passing wxNullIcon to SetIcon() is possible (it means that we shouldn't
     // have any icon), but adding an invalid icon to wxIconBundle is not
     wxIconBundle icons;
-    if ( icon.Ok() )
+    if ( icon.IsOk() )
         icons.AddIcon(icon);
 
     SetIcons(icons);
@@ -375,6 +361,14 @@ void wxTopLevelWindowBase::SetIcon(const wxIcon& icon)
 // whole client area
 void wxTopLevelWindowBase::DoLayout()
 {
+    // We are called during the window destruction several times, e.g. as
+    // wxFrame tries to adjust to its tool/status bars disappearing. But
+    // actually doing the layout is pretty useless in this case as the window
+    // will disappear anyhow -- so just don't bother.
+    if ( IsBeingDeleted() )
+        return;
+
+
     // if we're using constraints or sizers - do use them
     if ( GetAutoLayout() )
     {
@@ -383,7 +377,7 @@ void wxTopLevelWindowBase::DoLayout()
     else
     {
         // do we have _exactly_ one child?
-        wxWindow *child = (wxWindow *)NULL;
+        wxWindow *child = NULL;
         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
               node;
               node = node->GetNext() )
@@ -422,17 +416,6 @@ void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
     Destroy();
 }
 
-void wxTopLevelWindowBase::OnChildDestroy(wxWindowDestroyEvent& event)
-{
-    event.Skip();
-
-    wxWindow * const win = event.GetWindow();
-    if ( win == m_winDefault )
-        m_winDefault = NULL;
-    if ( win == m_winTmpDefault )
-        m_winTmpDefault = NULL;
-}
-
 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 {
     wxIconizeEvent event(GetId(), iconized);