Support using GetTextExtent() with empty string to get descent in wxOSX.

[wxWidgets.git] / include / wx / ustring.h

diff --git a/include/wx/ustring.h b/include/wx/ustring.h
index cf42a1024c17140e6ebb809b7555715892bf90cc..5b0d377e74d18a61718f35ddd6482f492ce6c1ef 100644 (file)
--- a/include/wx/ustring.h
+++ b/include/wx/ustring.h
@@ -17,16 +17,27 @@
 
 #if SIZEOF_WCHAR_T == 2
 typedef wxWCharBuffer wxU16CharBuffer;
+typedef wxScopedWCharBuffer wxScopedU16CharBuffer;
 #else
 typedef wxCharTypeBuffer<wxChar16> wxU16CharBuffer;
+typedef wxScopedCharTypeBuffer<wxChar16> wxScopedU16CharBuffer;
 #endif
 
 #if SIZEOF_WCHAR_T == 4
 typedef wxWCharBuffer wxU32CharBuffer;
+typedef wxScopedWCharBuffer wxScopedU32CharBuffer;
 #else
 typedef wxCharTypeBuffer<wxChar32> wxU32CharBuffer;
+typedef wxScopedCharTypeBuffer<wxChar32> wxScopedU32CharBuffer;
 #endif
 
+#ifdef __VISUALC__
+    // "non dll-interface class 'std::basic_string<wxChar32>' used as base
+    // interface for dll-interface class 'wxString'" -- this is OK in our case
+    // (and warning is unavoidable anyhow)
+    #pragma warning(push)
+    #pragma warning(disable:4275)
+#endif
 
 class WXDLLIMPEXP_BASE wxUString: public std::basic_string<wxChar32>
 {
@@ -34,16 +45,15 @@ public:
     wxUString() { }
 
     wxUString( const wxChar32 *str )                            { assign(str); }
-    wxUString( const wxUString &str )                           { assign(str); }
-    wxUString( const wxU32CharBuffer &buf )                     { assign(buf); }
+    wxUString( const wxScopedU32CharBuffer &buf )                     { assign(buf); }
 
     wxUString( const char *str )                                { assign(str); }
-    wxUString( const wxCharBuffer &buf )                        { assign(buf); }
+    wxUString( const wxScopedCharBuffer &buf )                        { assign(buf); }
     wxUString( const char *str, const wxMBConv &conv )          { assign(str,conv); }
-    wxUString( const wxCharBuffer &buf, const wxMBConv &conv )  { assign(buf,conv); }
+    wxUString( const wxScopedCharBuffer &buf, const wxMBConv &conv )  { assign(buf,conv); }
 
     wxUString( const wxChar16 *str )                            { assign(str); }
-    wxUString( const wxU16CharBuffer &buf )                     { assign(buf); }
+    wxUString( const wxScopedU16CharBuffer &buf )                     { assign(buf); }
 
     wxUString( const wxCStrData *cstr )                         { assign(cstr); }
     wxUString( const wxString &str )                            { assign(str); }
@@ -116,11 +126,11 @@ public:
 
     // conversions
 
-    wxCharBuffer utf8_str() const;
-    wxU16CharBuffer utf16_str() const;
+    wxScopedCharBuffer utf8_str() const;
+    wxScopedU16CharBuffer utf16_str() const;
 
 #if SIZEOF_WCHAR_T == 2
-    wxWCharBuffer wc_str() const
+    wxScopedWCharBuffer wc_str() const
     {
        return utf16_str();
     }
@@ -145,13 +155,13 @@ public:
     }
 
 #if wxUSE_UNICODE_UTF8
-    wxCharBuffer wx_str()
+    wxScopedCharBuffer wx_str()
     {
         return utf8_str();
     }
 #else
 #if SIZEOF_WCHAR_T == 2
-    wxWCharBuffer wx_str()
+    wxScopedWCharBuffer wx_str()
     {
         return utf16_str();
     }
@@ -189,19 +199,45 @@ public:
         return (wxUString &) base->assign( str, pos, n );
     }
 
-    wxUString &assign( wxChar32 ch )
-    {
-        std::basic_string<wxChar32> *base = this;
-        return (wxUString &) base->assign( (size_type) 1, ch );
-    }
+    // FIXME-VC6:  VC 6.0 stl does not support all types of assign functions
+    #ifdef __VISUALC6__
+        wxUString &assign( wxChar32 ch )
+        {
+            wxChar32 chh[1];
+            chh[0] = ch;
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &)base->assign(chh);
+        }
 
-    wxUString &assign( size_type n, wxChar32 ch )
-    {
-        std::basic_string<wxChar32> *base = this;
-        return (wxUString &) base->assign( n, ch );
-    }
+        wxUString &assign( size_type n, wxChar32 ch )
+        {
+            wxU32CharBuffer buffer(n);
+            wxChar32 *p = buffer.data();
+            size_type i;
+            for (i = 0; i < n; i++)
+            {
+               *p = ch;
+               p++;
+            }
+
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &)base->assign(buffer.data());
+        }
+    #else
+        wxUString &assign( wxChar32 ch )
+        {
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &) base->assign( (size_type) 1, ch );
+        }
 
-    wxUString &assign( const wxU32CharBuffer &buf )
+        wxUString &assign( size_type n, wxChar32 ch )
+        {
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &) base->assign( n, ch );
+        }
+    #endif // __VISUALC6__
+
+    wxUString &assign( const wxScopedU32CharBuffer &buf )
     {
         return assign( buf.data() );
     }
@@ -211,7 +247,7 @@ public:
         return assignFromCString( str );
     }
 
-    wxUString &assign( const wxCharBuffer &buf )
+    wxUString &assign( const wxScopedCharBuffer &buf )
     {
         return assignFromCString( buf.data() );
     }
@@ -221,7 +257,7 @@ public:
         return assignFromCString( str, conv );
     }
 
-    wxUString &assign( const wxCharBuffer &buf, const wxMBConv &conv )
+    wxUString &assign( const wxScopedCharBuffer &buf, const wxMBConv &conv )
     {
         return assignFromCString( buf.data(), conv );
     }
@@ -231,7 +267,7 @@ public:
         return assignFromUTF16( str );
     }
 
-    wxUString &assign( const wxU16CharBuffer &buf )
+    wxUString &assign( const wxScopedU16CharBuffer &buf )
     {
         return assignFromUTF16( buf.data() );
     }
@@ -346,11 +382,29 @@ public:
         return (wxUString &) base->append( s, n );
     }
 
-    wxUString &append( size_type n, wxChar32 c )
-    {
-        std::basic_string<wxChar32> *base = this;
-        return (wxUString &) base->append( n, c );
-    }
+    // FIXME-VC6:  VC 6.0 stl does not support all types of append functions
+    #ifdef __VISUALC6__
+        wxUString &append( size_type n, wxChar32 c )
+        {
+            wxU32CharBuffer buffer(n);
+            wxChar32 *p = buffer.data();
+            size_type i;
+            for (i = 0; i < n; i++)
+            {
+               *p = c;
+               p++;
+            }
+
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &) base->append(buffer.data());
+        }
+    #else
+        wxUString &append( size_type n, wxChar32 c )
+        {
+            std::basic_string<wxChar32> *base = this;
+            return (wxUString &) base->append( n, c );
+        }
+    #endif // __VISUALC6__
 
     wxUString &append( wxChar32 c )
     {
@@ -360,12 +414,12 @@ public:
 
     // append [wx overload]
 
-    wxUString &append( const wxU16CharBuffer &buf )
+    wxUString &append( const wxScopedU16CharBuffer &buf )
     {
         return append( buf.data() );
     }
 
-    wxUString &append( const wxU32CharBuffer &buf )
+    wxUString &append( const wxScopedU32CharBuffer &buf )
     {
         return append( buf.data() );
     }
@@ -375,7 +429,7 @@ public:
         return append( wxUString( str ) );
     }
 
-    wxUString &append( const wxCharBuffer &buf )
+    wxUString &append( const wxScopedCharBuffer &buf )
     {
         return append( wxUString( buf ) );
     }
@@ -467,17 +521,17 @@ public:
         return insert( n, wxUString( s ) );
     }
 
-    wxUString &insert( size_type n, const wxCharBuffer &buf )
+    wxUString &insert( size_type n, const wxScopedCharBuffer &buf )
     {
         return insert( n, wxUString( buf ) );
     }
 
-    wxUString &insert( size_type n, const wxU16CharBuffer &buf )
+    wxUString &insert( size_type n, const wxScopedU16CharBuffer &buf )
     {
         return insert( n, wxUString( buf ) );
     }
 
-    wxUString &insert( size_type n, const wxU32CharBuffer &buf )
+    wxUString &insert( size_type n, const wxScopedU32CharBuffer &buf )
     {
         return insert( n, buf.data() );
     }
@@ -524,8 +578,6 @@ public:
 
 
     // operator =
-    wxUString& operator=(const wxUString& s)
-        { return assign( s ); }
     wxUString& operator=(const wxString& s)
         { return assign( s ); }
     wxUString& operator=(const wxCStrData* s)
@@ -536,11 +588,11 @@ public:
         { return assign( s ); }
     wxUString& operator=(const wxChar32 *s)
         { return assign( s ); }
-    wxUString& operator=(const wxCharBuffer &s)
+    wxUString& operator=(const wxScopedCharBuffer &s)
         { return assign( s ); }
-    wxUString& operator=(const wxU16CharBuffer &s)
+    wxUString& operator=(const wxScopedU16CharBuffer &s)
         { return assign( s ); }
-    wxUString& operator=(const wxU32CharBuffer &s)
+    wxUString& operator=(const wxScopedU32CharBuffer &s)
         { return assign( s ); }
     wxUString& operator=(const char ch)
         { return assign( ch ); }
@@ -566,11 +618,11 @@ public:
         { return append( s ); }
     wxUString& operator+=(const wxChar32 *s)
         { return append( s ); }
-    wxUString& operator+=(const wxCharBuffer &s)
+    wxUString& operator+=(const wxScopedCharBuffer &s)
         { return append( s ); }
-    wxUString& operator+=(const wxU16CharBuffer &s)
+    wxUString& operator+=(const wxScopedU16CharBuffer &s)
         { return append( s ); }
-    wxUString& operator+=(const wxU32CharBuffer &s)
+    wxUString& operator+=(const wxScopedU32CharBuffer &s)
         { return append( s ); }
     wxUString& operator+=(const char ch)
         { return append( ch ); }
@@ -585,6 +637,10 @@ public:
 
 };
 
+#ifdef __VISUALC__
+    #pragma warning(pop)
+#endif
+
 inline wxUString operator+(const wxUString &s1, const wxUString &s2)
     { wxUString ret( s1 ); ret.append( s2 ); return ret; }
 inline wxUString operator+(const wxUString &s1, const char *s2)
@@ -597,11 +653,11 @@ inline wxUString operator+(const wxUString &s1, const wxChar16* s2)
     { return s1 + wxUString(s2); }
 inline wxUString operator+(const wxUString &s1, const wxChar32 *s2)
     { return s1 + wxUString(s2); }
-inline wxUString operator+(const wxUString &s1, const wxCharBuffer &s2)
+inline wxUString operator+(const wxUString &s1, const wxScopedCharBuffer &s2)
     { return s1 + wxUString(s2); }
-inline wxUString operator+(const wxUString &s1, const wxU16CharBuffer &s2)
+inline wxUString operator+(const wxUString &s1, const wxScopedU16CharBuffer &s2)
     { return s1 + wxUString(s2); }
-inline wxUString operator+(const wxUString &s1, const wxU32CharBuffer &s2)
+inline wxUString operator+(const wxUString &s1, const wxScopedU32CharBuffer &s2)
     { return s1 + wxUString(s2); }
 inline wxUString operator+(const wxUString &s1, char s2)
     { return s1 + wxUString(s2); }
@@ -624,11 +680,11 @@ inline wxUString operator+(const wxChar16* s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
 inline wxUString operator+(const wxChar32 *s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
-inline wxUString operator+(const wxCharBuffer &s1, const wxUString &s2)
+inline wxUString operator+(const wxScopedCharBuffer &s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
-inline wxUString operator+(const wxU16CharBuffer &s1, const wxUString &s2)
+inline wxUString operator+(const wxScopedU16CharBuffer &s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
-inline wxUString operator+(const wxU32CharBuffer &s1, const wxUString &s2)
+inline wxUString operator+(const wxScopedU32CharBuffer &s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
 inline wxUString operator+(char s1, const wxUString &s2)
     { return wxUString(s1) + s2; }
@@ -686,9 +742,9 @@ wxUSTRING_COMP_OPERATORS( const wxString & )
 wxUSTRING_COMP_OPERATORS( const char * )
 wxUSTRING_COMP_OPERATORS( const wxChar16 * )
 wxUSTRING_COMP_OPERATORS( const wxChar32 * )
-wxUSTRING_COMP_OPERATORS( const wxCharBuffer & )
-wxUSTRING_COMP_OPERATORS( const wxU16CharBuffer & )
-wxUSTRING_COMP_OPERATORS( const wxU32CharBuffer & )
+wxUSTRING_COMP_OPERATORS( const wxScopedCharBuffer & )
+wxUSTRING_COMP_OPERATORS( const wxScopedU16CharBuffer & )
+wxUSTRING_COMP_OPERATORS( const wxScopedU32CharBuffer & )
 wxUSTRING_COMP_OPERATORS( const wxCStrData * )
 
 #endif // _WX_USTRING_H_