check whether the string is non-empty before accessing its first element

[wxWidgets.git] / src / unix / fontutil.cpp

diff --git a/src/unix/fontutil.cpp b/src/unix/fontutil.cpp
index 7b1801857e34c3e844e8a6e9ed31497842f634d4..8ec7b7892d57ad690d4af308f4f8ae38fac00e69 100644 (file)
--- a/src/unix/fontutil.cpp
+++ b/src/unix/fontutil.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        unix/fontutil.cpp
+// Name:        src/unix/fontutil.cpp

 // Purpose:     Font helper functions for X11 (GDK/X)
 // Author:      Vadim Zeitlin
 // Modified by:
 // Purpose:     Font helper functions for X11 (GDK/X)
 // Author:      Vadim Zeitlin
 // Modified by:


@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "fontutil.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -28,26 +24,37 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

+#include "wx/fontutil.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

+    #include "wx/app.h"

     #include "wx/font.h" // wxFont enums
     #include "wx/encinfo.h"
     #include "wx/font.h" // wxFont enums
     #include "wx/encinfo.h"

+    #include "wx/hash.h"
+    #include "wx/utils.h"       // for wxGetDisplay()
+    #include "wx/module.h"

 #endif // PCH
 
 #endif // PCH
 

-#include "wx/fontutil.h"

 #include "wx/fontmap.h"
 #include "wx/tokenzr.h"
 #include "wx/fontmap.h"
 #include "wx/tokenzr.h"

-#include "wx/hash.h"
-#include "wx/module.h"
+#include "wx/fontenum.h"

 
 #if wxUSE_PANGO
 
 #include "pango/pango.h"
 
 #ifdef __WXGTK20__
 
 #if wxUSE_PANGO
 
 #include "pango/pango.h"
 
 #ifdef __WXGTK20__

-#include "wx/gtk/private.h"
-extern GtkWidget *wxGetRootWindow();
+    #include "wx/gtk/private.h"
+    extern GtkWidget *wxGetRootWindow();
+
+    #define wxPANGO_CONV wxGTK_CONV_SYS
+    #define wxPANGO_CONV_BACK wxGTK_CONV_BACK_SYS

 #else
 #else

-#include "wx/x11/private.h"
+    #include "wx/x11/private.h"
+    #include "wx/gtk/private/string.h"
+
+    #define wxPANGO_CONV(s) (wxConvUTF8.cWX2MB((s)))
+    #define wxPANGO_CONV_BACK(s) (wxConvUTF8.cMB2WX((s)))

 #endif
 
 // ----------------------------------------------------------------------------
 #endif
 
 // ----------------------------------------------------------------------------


@@ -126,20 +133,26 @@ wxFontWeight wxNativeFontInfo::GetWeight() const
 
 bool wxNativeFontInfo::GetUnderlined() const
 {
 
 bool wxNativeFontInfo::GetUnderlined() const
 {

-    return FALSE;
+    return false;

 }
 
 wxString wxNativeFontInfo::GetFaceName() const
 {
 }
 
 wxString wxNativeFontInfo::GetFaceName() const
 {

-    wxString tmp = wxGTK_CONV_BACK( pango_font_description_get_family( description ) );
-
-    return tmp;
+    return wxPANGO_CONV_BACK(pango_font_description_get_family(description));

 }
 
 wxFontFamily wxNativeFontInfo::GetFamily() const
 {
     wxFontFamily ret = wxFONTFAMILY_DEFAULT;
 }
 
 wxFontFamily wxNativeFontInfo::GetFamily() const
 {
     wxFontFamily ret = wxFONTFAMILY_DEFAULT;

-    char *family_text = g_ascii_strdown( pango_font_description_get_family( description ), -1 );
+    // note: not passing -1 as the 2nd parameter to g_ascii_strdown to work
+    // around a bug in the 64-bit glib shipped with solaris 10, -1 causes it
+    // to try to allocate 2^32 bytes.
+    const char *family_name = pango_font_description_get_family( description );
+    if ( !family_name )
+        return ret;
+
+    wxGtkString family_text(g_ascii_strdown(family_name, strlen(family_name)));
+

     // Check for some common fonts, to salvage what we can from the current win32 centric wxFont API:
     if (strncmp( family_text, "monospace", 9 ) == 0)
         ret = wxFONTFAMILY_TELETYPE; // begins with "Monospace"
     // Check for some common fonts, to salvage what we can from the current win32 centric wxFont API:
     if (strncmp( family_text, "monospace", 9 ) == 0)
         ret = wxFONTFAMILY_TELETYPE; // begins with "Monospace"


@@ -173,7 +186,9 @@ wxFontFamily wxNativeFontInfo::GetFamily() const
 
         g_free(families);
 
 
         g_free(families);
 

-        wxASSERT_MSG( family, wxT("wxNativeFontInfo::GetFamily() - No appropriate PangoFontFamily found for ::description") );
+        // Some gtk+ systems might query for a non-existing font from wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)
+        // on initialization, don't assert until wxSystemSettings::GetFont is checked for this - MR
+        // wxASSERT_MSG( family, wxT("wxNativeFontInfo::GetFamily() - No appropriate PangoFontFamily found for ::description") );

 
         //BCI: Cache the wxFontFamily inside the class. Validate cache with
         //BCI: g_ascii_strcasecmp(pango_font_description_get_family(description), pango_font_family_get_name(family)) == 0
 
         //BCI: Cache the wxFontFamily inside the class. Validate cache with
         //BCI: g_ascii_strcasecmp(pango_font_description_get_family(description), pango_font_family_get_name(family)) == 0


@@ -195,7 +210,6 @@ wxFontFamily wxNativeFontInfo::GetFamily() const
             ret = wxFONTFAMILY_DECORATIVE; // Begins with "Old" - "Old English", "Old Town"
     }
 
             ret = wxFONTFAMILY_DECORATIVE; // Begins with "Old" - "Old English", "Old Town"
     }
 

-    free(family_text);

     return ret;
 }
 
     return ret;
 }
 


@@ -252,9 +266,10 @@ void wxNativeFontInfo::SetUnderlined(bool WXUNUSED(underlined))
     wxFAIL_MSG( _T("not implemented") );
 }
 
     wxFAIL_MSG( _T("not implemented") );
 }
 

-void wxNativeFontInfo::SetFaceName(wxString facename)
+bool wxNativeFontInfo::SetFaceName(const wxString& facename)

 {
 {

-    pango_font_description_set_family( description, wxGTK_CONV(facename) );
+    pango_font_description_set_family(description, wxPANGO_CONV(facename));
+    return true;

 }
 
 void wxNativeFontInfo::SetFamily(wxFontFamily WXUNUSED(family))
 }
 
 void wxNativeFontInfo::SetFamily(wxFontFamily WXUNUSED(family))


@@ -274,18 +289,45 @@ bool wxNativeFontInfo::FromString(const wxString& s)
     if (description)
         pango_font_description_free( description );
 
     if (description)
         pango_font_description_free( description );
 

-    description = pango_font_description_from_string( wxGTK_CONV( s ) );
+    // there is a bug in at least pango <= 1.13 which makes it (or its backends)
+    // segfault for very big point sizes and for negative point sizes.
+    // To workaround that bug for pango <= 1.13
+    // (see http://bugzilla.gnome.org/show_bug.cgi?id=340229)
+    // we do the check on the size here using same (arbitrary) limits used by
+    // pango > 1.13. Note that the segfault could happen also for pointsize
+    // smaller than this limit !!
+    wxString str(s);
+    const size_t pos = str.find_last_of(_T(" "));
+    double size;
+    if ( pos != wxString::npos && wxString(str, pos + 1).ToDouble(&size) )
+    {
+        wxString sizeStr;
+        if ( size < 1 )
+            sizeStr = _T("1");
+        else if ( size >= 1E6 )
+            sizeStr = _T("1E6");

 
 

-    return TRUE;
+        if ( !sizeStr.empty() )
+        {
+            // replace the old size with the adjusted one
+            str = wxString(s, 0, pos) + sizeStr;
+        }
+    }
+
+    description = pango_font_description_from_string(wxPANGO_CONV(str));
+
+    // ensure a valid facename is selected
+    if (!wxFontEnumerator::IsValidFacename(GetFaceName()))
+        SetFaceName(wxNORMAL_FONT->GetFaceName());
+
+    return true;

 }
 
 wxString wxNativeFontInfo::ToString() const
 {
 }
 
 wxString wxNativeFontInfo::ToString() const
 {

-    char *str = pango_font_description_to_string( description );
-    wxString tmp = wxGTK_CONV_BACK(  str );
-    g_free( str );
+    wxGtkString str(pango_font_description_to_string( description ));

 
 

-    return tmp;
+    return wxPANGO_CONV_BACK(str);

 }
 
 bool wxNativeFontInfo::FromUserString(const wxString& s)
 }
 
 bool wxNativeFontInfo::FromUserString(const wxString& s)


@@ -298,41 +340,6 @@ wxString wxNativeFontInfo::ToUserString() const
     return ToString();
 }
 
     return ToString();
 }
 

-// ----------------------------------------------------------------------------
-// wxNativeEncodingInfo
-// ----------------------------------------------------------------------------
-
-bool wxNativeEncodingInfo::FromString(const wxString& s)
-{
-    return FALSE;
-}
-
-wxString wxNativeEncodingInfo::ToString() const
-{
-    return wxEmptyString;
-}
-
-bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
-{
-    return TRUE;
-}
-
-bool wxGetNativeFontEncoding(wxFontEncoding encoding,
-                             wxNativeEncodingInfo *info)
-{
-    // we *must* return true for default encoding as otherwise wxFontMapper
-    // considers that we can't load any font and aborts with wxLogFatalError!
-    if ( encoding == wxFONTENCODING_SYSTEM )
-    {
-        info->facename.clear();
-        info->encoding = wxFONTENCODING_SYSTEM;
-    }
-
-    // pretend that we support everything, it's better than to always return
-    // false as the old code did
-    return true;
-}
-

 #else // GTK+ 1.x
 
 #ifdef __X__
 #else // GTK+ 1.x
 
 #ifdef __X__


@@ -346,7 +353,6 @@ bool wxGetNativeFontEncoding(wxFontEncoding encoding,
         #pragma message enable nosimpint
     #endif
 
         #pragma message enable nosimpint
     #endif
 

-    #include "wx/utils.h"       // for wxGetDisplay()

 #elif defined(__WXGTK__)
     // we have to declare struct tm to avoid problems with first forward
     // declaring it in C code (glib.h included from gdk.h does it) and then
 #elif defined(__WXGTK__)
     // we have to declare struct tm to avoid problems with first forward
     // declaring it in C code (glib.h included from gdk.h does it) and then


@@ -429,28 +435,28 @@ bool wxNativeEncodingInfo::FromString(const wxString& s)
     wxString encid = tokenizer.GetNextToken();
     long enc;
     if ( !encid.ToLong(&enc) )
     wxString encid = tokenizer.GetNextToken();
     long enc;
     if ( !encid.ToLong(&enc) )

-        return FALSE;
+        return false;

     encoding = (wxFontEncoding)enc;
 
     xregistry = tokenizer.GetNextToken();
     if ( !xregistry )
     encoding = (wxFontEncoding)enc;
 
     xregistry = tokenizer.GetNextToken();
     if ( !xregistry )

-        return FALSE;
+        return false;

 
     xencoding = tokenizer.GetNextToken();
     if ( !xencoding )
 
     xencoding = tokenizer.GetNextToken();
     if ( !xencoding )

-        return FALSE;
+        return false;

 
     // ok even if empty
     facename = tokenizer.GetNextToken();
 
 
     // ok even if empty
     facename = tokenizer.GetNextToken();
 

-    return TRUE;
+    return true;

 }
 
 wxString wxNativeEncodingInfo::ToString() const
 {
     wxString s;
     s << (long)encoding << _T(';') << xregistry << _T(';') << xencoding;
 }
 
 wxString wxNativeEncodingInfo::ToString() const
 {
     wxString s;
     s << (long)encoding << _T(';') << xregistry << _T(';') << xencoding;

-    if ( !!facename )
+    if ( !facename.empty() )

     {
         s << _T(';') << facename;
     }
     {
         s << _T(';') << facename;
     }


@@ -464,7 +470,7 @@ wxString wxNativeEncodingInfo::ToString() const
 
 void wxNativeFontInfo::Init()
 {
 
 void wxNativeFontInfo::Init()
 {

-    m_isDefault = TRUE;
+    m_isDefault = true;

 }
 
 bool wxNativeFontInfo::FromString(const wxString& s)
 }
 
 bool wxNativeFontInfo::FromString(const wxString& s)


@@ -474,13 +480,13 @@ bool wxNativeFontInfo::FromString(const wxString& s)
     // check the version
     wxString token = tokenizer.GetNextToken();
     if ( token != _T('0') )
     // check the version
     wxString token = tokenizer.GetNextToken();
     if ( token != _T('0') )

-        return FALSE;
+        return false;

 
     xFontName = tokenizer.GetNextToken();
 
     // this should be the end
     if ( tokenizer.HasMoreTokens() )
 
     xFontName = tokenizer.GetNextToken();
 
     // this should be the end
     if ( tokenizer.HasMoreTokens() )

-        return FALSE;
+        return false;

 
     return FromXFontName(xFontName);
 }
 
     return FromXFontName(xFontName);
 }


@@ -510,13 +516,13 @@ bool wxNativeFontInfo::HasElements() const
 
 wxString wxNativeFontInfo::GetXFontComponent(wxXLFDField field) const
 {
 
 wxString wxNativeFontInfo::GetXFontComponent(wxXLFDField field) const
 {

-    wxCHECK_MSG( field < wxXLFD_MAX, _T(""), _T("invalid XLFD field") );
+    wxCHECK_MSG( field < wxXLFD_MAX, wxEmptyString, _T("invalid XLFD field") );

 
     if ( !HasElements() )
     {
         // const_cast
         if ( !((wxNativeFontInfo *)this)->FromXFontName(xFontName) )
 
     if ( !HasElements() )
     {
         // const_cast
         if ( !((wxNativeFontInfo *)this)->FromXFontName(xFontName) )

-            return _T("");
+            return wxEmptyString;

     }
 
     return fontElements[field];
     }
 
     return fontElements[field];


@@ -529,7 +535,7 @@ bool wxNativeFontInfo::FromXFontName(const wxString& fontname)
 
     // skip the leading, usually empty field (font name registry)
     if ( !tokenizer.HasMoreTokens() )
 
     // skip the leading, usually empty field (font name registry)
     if ( !tokenizer.HasMoreTokens() )

-        return FALSE;
+        return false;

 
     (void)tokenizer.GetNextToken();
 
 
     (void)tokenizer.GetNextToken();
 


@@ -538,14 +544,14 @@ bool wxNativeFontInfo::FromXFontName(const wxString& fontname)
         if ( !tokenizer.HasMoreTokens() )
         {
             // not enough elements in the XLFD - or maybe an alias
         if ( !tokenizer.HasMoreTokens() )
         {
             // not enough elements in the XLFD - or maybe an alias

-            return FALSE;
+            return false;

         }
 
         wxString field = tokenizer.GetNextToken();
         if ( !field.empty() && field != _T('*') )
         {
             // we're really initialized now
         }
 
         wxString field = tokenizer.GetNextToken();
         if ( !field.empty() && field != _T('*') )
         {
             // we're really initialized now

-            m_isDefault = FALSE;
+            m_isDefault = false;

         }
 
         fontElements[n] = field;
         }
 
         fontElements[n] = field;


@@ -553,9 +559,9 @@ bool wxNativeFontInfo::FromXFontName(const wxString& fontname)
 
     // this should be all
     if ( tokenizer.HasMoreTokens() )
 
     // this should be all
     if ( tokenizer.HasMoreTokens() )

-        return FALSE;
+        return false;

 
 

-    return TRUE;
+    return true;

 }
 
 wxString wxNativeFontInfo::GetXFontName() const
 }
 
 wxString wxNativeFontInfo::GetXFontName() const


@@ -613,7 +619,7 @@ void wxNativeFontInfo::SetXFontName(const wxString& xFontName_)
 
     xFontName = xFontName_;
 
 
     xFontName = xFontName_;
 

-    m_isDefault = FALSE;
+    m_isDefault = false;

 }
 
 int wxNativeFontInfo::GetPointSize() const
 }
 
 int wxNativeFontInfo::GetPointSize() const


@@ -636,7 +642,7 @@ wxFontStyle wxNativeFontInfo::GetStyle() const
         return wxFONTSTYLE_NORMAL;
     }
 
         return wxFONTSTYLE_NORMAL;
     }
 

-    switch ( s[0] )
+    switch ( s[0].GetValue() )

     {
         default:
             // again, unknown but consider normal by default
     {
         default:
             // again, unknown but consider normal by default


@@ -666,7 +672,7 @@ wxFontWeight wxNativeFontInfo::GetWeight() const
 bool wxNativeFontInfo::GetUnderlined() const
 {
     // X fonts are never underlined
 bool wxNativeFontInfo::GetUnderlined() const
 {
     // X fonts are never underlined

-    return FALSE;
+    return false;

 }
 
 wxString wxNativeFontInfo::GetFaceName() const
 }
 
 wxString wxNativeFontInfo::GetFaceName() const


@@ -751,12 +757,13 @@ void wxNativeFontInfo::SetUnderlined(bool WXUNUSED(underlined))
     // can't do this under X
 }
 
     // can't do this under X
 }
 

-void wxNativeFontInfo::SetFaceName(wxString facename)
+bool wxNativeFontInfo::SetFaceName(const wxString& facename)

 {
     SetXFontComponent(wxXLFD_FAMILY, facename);
 {
     SetXFontComponent(wxXLFD_FAMILY, facename);

+    return true;

 }
 
 }
 

-void wxNativeFontInfo::SetFamily(wxFontFamily family)
+void wxNativeFontInfo::SetFamily(wxFontFamily WXUNUSED(family))

 {
     // wxFontFamily -> X foundry, anyone?
     wxFAIL_MSG( _T("not implemented") );
 {
     // wxFontFamily -> X foundry, anyone?
     wxFAIL_MSG( _T("not implemented") );


@@ -781,7 +788,7 @@ void wxNativeFontInfo::SetEncoding(wxFontEncoding encoding)
 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
                              wxNativeEncodingInfo *info)
 {
 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
                              wxNativeEncodingInfo *info)
 {

-    wxCHECK_MSG( info, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
+    wxCHECK_MSG( info, false, _T("bad pointer in wxGetNativeFontEncoding") );

 
     if ( encoding == wxFONTENCODING_DEFAULT )
     {
 
     if ( encoding == wxFONTENCODING_DEFAULT )
     {


@@ -858,12 +865,12 @@ bool wxGetNativeFontEncoding(wxFontEncoding encoding,
 
         default:
             // don't know how to translate this encoding into X fontspec
 
         default:
             // don't know how to translate this encoding into X fontspec

-            return FALSE;
+            return false;

     }
 
     info->encoding = encoding;
 
     }
 
     info->encoding = encoding;
 

-    return TRUE;
+    return true;

 }
 
 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 }
 
 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)


@@ -927,7 +934,7 @@ wxNativeFont wxLoadQueryNearestFont(int pointSize,
     wxNativeFont font = 0;
 
     // if we already have the X font name, try to use it
     wxNativeFont font = 0;
 
     // if we already have the X font name, try to use it

-    if( xFontName && !xFontName->IsEmpty() )
+    if( xFontName && !xFontName->empty() )

     {
         //
         //  Make sure point size is correct for scale factor.
     {
         //
         //  Make sure point size is correct for scale factor.


@@ -1040,7 +1047,7 @@ wxNativeFont wxLoadQueryNearestFont(int pointSize,
                 if ( !font )
                 {
                     font = wxLoadQueryFont(-1, wxDEFAULT, wxNORMAL, wxNORMAL,
                 if ( !font )
                 {
                     font = wxLoadQueryFont(-1, wxDEFAULT, wxNORMAL, wxNORMAL,

-                                           FALSE, wxEmptyString,
+                                           false, wxEmptyString,

                                            info.xregistry, info.xencoding,
                                            xFontName);
 
                                            info.xregistry, info.xencoding,
                                            xFontName);
 


@@ -1053,7 +1060,7 @@ wxNativeFont wxLoadQueryNearestFont(int pointSize,
 
                         font = wxLoadQueryFont(-1,
                                                wxDEFAULT, wxNORMAL, wxNORMAL,
 
                         font = wxLoadQueryFont(-1,
                                                wxDEFAULT, wxNORMAL, wxNORMAL,

-                                               FALSE, wxEmptyString,
+                                               false, wxEmptyString,

                                                _T("*"), _T("*"),
                                                xFontName);
                     }
                                                _T("*"), _T("*"),
                                                xFontName);
                     }


@@ -1069,20 +1076,20 @@ wxNativeFont wxLoadQueryNearestFont(int pointSize,
 // private functions
 // ----------------------------------------------------------------------------
 
 // private functions
 // ----------------------------------------------------------------------------
 

-// returns TRUE if there are any fonts matching this font spec
+// returns true if there are any fonts matching this font spec

 static bool wxTestFontSpec(const wxString& fontspec)
 {
     // some X servers will fail to load this font because there are too many
     // matches so we must test explicitly for this
     if ( fontspec == _T("-*-*-*-*-*-*-*-*-*-*-*-*-*-*") )
     {
 static bool wxTestFontSpec(const wxString& fontspec)
 {
     // some X servers will fail to load this font because there are too many
     // matches so we must test explicitly for this
     if ( fontspec == _T("-*-*-*-*-*-*-*-*-*-*-*-*-*-*") )
     {

-        return TRUE;
+        return true;

     }
 
     wxNativeFont test = (wxNativeFont) g_fontHash->Get( fontspec );
     if (test)
     {
     }
 
     wxNativeFont test = (wxNativeFont) g_fontHash->Get( fontspec );
     if (test)
     {

-        return TRUE;
+        return true;

     }
 
     test = wxLoadFont(fontspec);
     }
 
     test = wxLoadFont(fontspec);


@@ -1092,11 +1099,11 @@ static bool wxTestFontSpec(const wxString& fontspec)
     {
         wxFreeFont(test);
 
     {
         wxFreeFont(test);
 

-        return TRUE;
+        return true;

     }
     else
     {
     }
     else
     {

-        return FALSE;
+        return false;

     }
 }
 
     }
 }
 


@@ -1193,7 +1200,7 @@ static wxNativeFont wxLoadQueryFont(int pointSize,
 
 #else
     wxString fontSpec;
 
 #else
     wxString fontSpec;

-    if (!facename.IsEmpty())
+    if (!facename.empty())

     {
         fontSpec.Printf(wxT("-*-%s-*-*-normal-*-*-*-*-*-*-*-*-*"),
                         facename.c_str());
     {
         fontSpec.Printf(wxT("-*-%s-*-*-normal-*-*-*-*-*-*-*-*-*"),
                         facename.c_str());


@@ -1391,7 +1398,7 @@ bool wxFontModule::OnInit()
 {
     g_fontHash = new wxHashTable( wxKEY_STRING );
 
 {
     g_fontHash = new wxHashTable( wxKEY_STRING );
 

-    return TRUE;
+    return true;

 }
 
 void wxFontModule::OnExit()
 }
 
 void wxFontModule::OnExit()


@@ -1402,4 +1409,3 @@ void wxFontModule::OnExit()
 }
 
 #endif // GTK 2.0/1.x
 }
 
 #endif // GTK 2.0/1.x

-