Avoid an endless recursion situation

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

diff --git a/src/common/dobjcmn.cpp b/src/common/dobjcmn.cpp
index df021af849a3669ca8404e22c730b61e720c4e65..f019177524dfc68224fee31247d3a8048552b3a8 100644 (file)
--- a/src/common/dobjcmn.cpp
+++ b/src/common/dobjcmn.cpp
@@ -94,21 +94,18 @@ wxDataObjectComposite::~wxDataObjectComposite()
 }
 
 wxDataObjectSimple *
-wxDataObjectComposite::GetObject(const wxDataFormat& format) const
+wxDataObjectComposite::GetObject(const wxDataFormat& format, wxDataObjectBase::Direction dir) const
 {
     wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.GetFirst();
+
     while ( node )
     {
         wxDataObjectSimple *dataObj = node->GetData();
 
-        if ( dataObj->GetFormat() == format )
-        {
-            return dataObj;
-        }
-
+        if (dataObj->IsSupported(format,dir))
+          return dataObj;
         node = node->GetNext();
     }
-
     return NULL;
 }
 
@@ -176,21 +173,33 @@ void* wxDataObjectComposite::SetSizeInBuffer( void* buffer, size_t size,
 
 #endif
 
-size_t wxDataObjectComposite::GetFormatCount(Direction WXUNUSED(dir)) const
+size_t wxDataObjectComposite::GetFormatCount(Direction dir) const
 {
-    // TODO what about the Get/Set only formats?
-    return m_dataObjects.GetCount();
+    size_t n = 0;
+
+    // NOTE: some wxDataObjectSimple objects may return a number greater than 1
+    //       from GetFormatCount(): this is the case of e.g. wxTextDataObject
+    //       under wxMac and wxGTK
+    wxSimpleDataObjectList::compatibility_iterator node;
+    for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() )
+        n += node->GetData()->GetFormatCount(dir);
+
+    return n;
 }
 
 void wxDataObjectComposite::GetAllFormats(wxDataFormat *formats,
-                                          Direction WXUNUSED(dir)) const
+                                          Direction dir) const
 {
-    size_t n = 0;
+    size_t index(0);
     wxSimpleDataObjectList::compatibility_iterator node;
+
     for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() )
     {
-        // TODO if ( !outputOnlyToo ) && this one counts ...
-        formats[n++] = node->GetData()->GetFormat();
+        // NOTE: some wxDataObjectSimple objects may return more than 1 format
+        //       from GetAllFormats(): this is the case of e.g. wxTextDataObject
+        //       under wxMac and wxGTK
+        node->GetData()->GetAllFormats(formats+index, dir);
+        index += node->GetData()->GetFormatCount(dir);
     }
 }
 
@@ -346,22 +355,22 @@ bool wxTextDataObject::SetData(const wxDataFormat& format,
 
 #elif defined(wxNEEDS_UTF16_FOR_TEXT_DATAOBJ)
 
-static wxMBConvUTF16 sUTF16Converter;
+namespace
+{
 
-static inline wxMBConv& GetConv(const wxDataFormat& format)
+inline wxMBConv& GetConv(const wxDataFormat& format)
 {
-    return
-        format == wxDF_UNICODETEXT
-        ? (wxMBConv&) sUTF16Converter
-        : (wxMBConv&) wxConvLocal;
+    static wxMBConvUTF16 s_UTF16Converter;
+
+    return format == wxDF_UNICODETEXT ? static_cast<wxMBConv&>(s_UTF16Converter)
+                                      : static_cast<wxMBConv&>(wxConvLocal);
 }
 
+} // anonymous namespace
+
 size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const
 {
-    size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 );
-    len += (format == wxDF_UNICODETEXT ? 2 : 1);
-
-    return len;
+    return GetConv(format).WC2MB(NULL, GetText().wc_str(), 0);
 }
 
 bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const
@@ -369,26 +378,21 @@ bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const
     if ( buf == NULL )
         return false;
 
-    wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() );
+    wxCharBuffer buffer(GetConv(format).cWX2MB(GetText().c_str()));
 
-    size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 );
-    len += (format == wxDF_UNICODETEXT ? 2 : 1);
-
-    // trailing (uni)char 0
-    memcpy( (char*)buf, (const char*)buffer, len );
+    memcpy(buf, buffer.data(), buffer.length());
 
     return true;
 }
 
 bool wxTextDataObject::SetData(const wxDataFormat& format,
-                               size_t WXUNUSED(len), const void *buf)
+                               size_t WXUNUSED(len),
+                               const void *buf)
 {
     if ( buf == NULL )
         return false;
 
-    wxWCharBuffer buffer = GetConv(format).cMB2WX( (const char*)buf );
-
-    SetText( buffer );
+    SetText(GetConv(format).cMB2WX(static_cast<const char*>(buf)));
 
     return true;
 }
@@ -402,14 +406,16 @@ size_t wxTextDataObject::GetDataSize() const
 
 bool wxTextDataObject::GetDataHere(void *buf) const
 {
-    wxStrcpy( (wxChar*)buf, GetText().c_str() );
+    // NOTE: use wxTmemcpy() instead of wxStrncpy() to allow
+    //       retrieval of strings with embedded NULLs
+    wxTmemcpy( (wxChar*)buf, GetText().c_str(), GetTextLength() );
 
     return true;
 }
 
-bool wxTextDataObject::SetData(size_t WXUNUSED(len), const void *buf)
+bool wxTextDataObject::SetData(size_t len, const void *buf)
 {
-    SetText( wxString((const wxChar*)buf) );
+    SetText( wxString((const wxChar*)buf, len/sizeof(wxChar)) );
 
     return true;
 }