Some improvements to accessibility behaviour

[wxWidgets.git] / src / msw / fontenum.cpp

diff --git a/src/msw/fontenum.cpp b/src/msw/fontenum.cpp
index fe6fe19421b34861e55cfa5ca11b39b7ed511b3a..8ed53278ae36c7edc86ee71836c42b4766fd726c 100644 (file)
--- a/src/msw/fontenum.cpp
+++ b/src/msw/fontenum.cpp
@@ -1,13 +1,25 @@
-/////////////////////////////////////////////////////////////////////////////
-// Name:        fontenum.cpp
+///////////////////////////////////////////////////////////////////////////////
+// Name:        msw/fontenum.cpp

 // Purpose:     wxFontEnumerator class for Windows
 // Author:      Julian Smart
 // Purpose:     wxFontEnumerator class for Windows
 // Author:      Julian Smart

-// Modified by:
+// Modified by: Vadim Zeitlin to add support for font encodings

 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence

-/////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#ifdef __GNUG__
+    #pragma implementation "fontenum.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"


@@ -16,48 +28,269 @@
   #pragma hdrstop
 #endif
 
   #pragma hdrstop
 #endif
 

+#if wxUSE_FONTMAP
+

 #ifndef WX_PRECOMP
   #include "wx/font.h"
 #endif
 
 #ifndef WX_PRECOMP
   #include "wx/font.h"
 #endif
 

-#include <wx/msw/private.h>
+#include "wx/fontutil.h"
+#include "wx/fontenum.h"
+#include "wx/fontmap.h"
+
+#include "wx/msw/private.h"
+
+// ----------------------------------------------------------------------------
+// private classes
+// ----------------------------------------------------------------------------
+
+// the helper class which calls ::EnumFontFamilies() and whose OnFont() is
+// called from the callback passed to this function and, in its turn, calls the
+// appropariate wxFontEnumerator method
+class wxFontEnumeratorHelper
+{
+public:
+    wxFontEnumeratorHelper(wxFontEnumerator *fontEnum);
+
+    // control what exactly are we enumerating
+        // we enumerate fonts with given enocding
+    bool SetEncoding(wxFontEncoding encoding);
+        // we enumerate fixed-width fonts
+    void SetFixedOnly(bool fixedOnly) { m_fixedOnly = fixedOnly; }
+        // we enumerate the encodings available in this family
+    void SetFamily(const wxString& family);
+
+    // call to start enumeration
+    void DoEnumerate();
+
+    // called by our font enumeration proc
+    bool OnFont(const LPLOGFONT lf, const LPTEXTMETRIC tm) const;
+
+private:
+    // the object we forward calls to OnFont() to
+    wxFontEnumerator *m_fontEnum;
+
+    // if != -1, enum only fonts which have this encoding
+    int m_charset;
+
+    // if not empty, enum only the fonts with this facename
+    wxString m_facename;
+
+    // if not empty, enum only the fonts in this family
+    wxString m_family;

 
 

+    // if TRUE, enum only fixed fonts
+    bool m_fixedOnly;
+
+    // if TRUE, we enumerate the encodings, not fonts
+    bool m_enumEncodings;
+
+    // the list of charsets we already found while enumerating charsets
+    wxArrayInt m_charsets;
+
+    // the list of facenames we already found while enumerating facenames
+    wxArrayString m_facenames;
+
+    DECLARE_NO_COPY_CLASS(wxFontEnumeratorHelper)
+};
+
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
+
+#ifndef __WXMICROWIN__

 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,

-                           DWORD dwStyle, LONG lParam)
+                                  DWORD dwStyle, LONG lParam);
+#endif
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxFontEnumeratorHelper
+// ----------------------------------------------------------------------------
+
+wxFontEnumeratorHelper::wxFontEnumeratorHelper(wxFontEnumerator *fontEnum)

 {
 {

-    // Get rid of any fonts that we don't want...
-       if (dwStyle != TRUETYPE_FONTTYPE)
-               return 1;
+    m_fontEnum = fontEnum;
+    m_charset = DEFAULT_CHARSET;
+    m_fixedOnly = FALSE;
+    m_enumEncodings = FALSE;
+}

 
 

-       wxFontEnumerator *fontEnum = (wxFontEnumerator *)lParam;
+void wxFontEnumeratorHelper::SetFamily(const wxString& family)
+{
+    m_enumEncodings = TRUE;
+    m_family = family;
+}
+
+bool wxFontEnumeratorHelper::SetEncoding(wxFontEncoding encoding)
+{
+    if ( encoding != wxFONTENCODING_SYSTEM )
+    {
+        wxNativeEncodingInfo info;
+        if ( !wxGetNativeFontEncoding(encoding, &info) )
+        {
+#if wxUSE_FONTMAP
+            if ( !wxFontMapper::Get()->GetAltForEncoding(encoding, &info) )
+#endif // wxUSE_FONTMAP
+            {
+                // no such encodings at all
+                return FALSE;
+            }
+        }

 
 

-    wxFont font = wxCreateFontFromLogFont(lplf);
+        m_charset = info.charset;
+        m_facename = info.facename;
+    }

 
 

-       if (fontEnum->OnFont(font))
-           return 1 ;
-    else
-        return 0 ;
+    return TRUE;

 }
 
 }
 

-IMPLEMENT_CLASS(wxFontEnumerator, wxObject)
+#if defined(__GNUWIN32__) && !defined(__CYGWIN10__) && !wxCHECK_W32API_VERSION( 1, 1 ) && !wxUSE_NORLANDER_HEADERS
+    #define wxFONTENUMPROC int(*)(ENUMLOGFONTEX *, NEWTEXTMETRICEX*, int, LPARAM)
+#else
+    #define wxFONTENUMPROC FONTENUMPROC
+#endif

 
 

-bool wxFontEnumerator::Enumerate()
+void wxFontEnumeratorHelper::DoEnumerate()

 {
 {

-    m_faceNames.Clear();
+#ifndef __WXMICROWIN__
+    HDC hDC = ::GetDC(NULL);

 
 

-       HDC hDC = ::GetDC(NULL);

 #ifdef __WIN32__
 #ifdef __WIN32__

-    ::EnumFontFamilies(hDC, (LPTSTR) NULL, (FONTENUMPROC) wxFontEnumeratorProc, (LPARAM) (void*) this) ;
-#else
-    ::EnumFonts(hDC, (LPTSTR) NULL, (FONTENUMPROC) wxFontEnumeratorProc, (LPARAM) (void*) this) ;
+    LOGFONT lf;
+    lf.lfCharSet = m_charset;
+    wxStrncpy(lf.lfFaceName, m_facename, WXSIZEOF(lf.lfFaceName));
+    lf.lfPitchAndFamily = 0;
+    ::EnumFontFamiliesEx(hDC, &lf, (wxFONTENUMPROC)wxFontEnumeratorProc,
+                         (LPARAM)this, 0 /* reserved */) ;
+#else // Win16
+    ::EnumFonts(hDC, (LPTSTR)NULL, (FONTENUMPROC)wxFontEnumeratorProc,
+    #ifdef STRICT
+               (LPARAM)
+    #else
+               (LPSTR)
+    #endif
+               this);
+#endif // Win32/16
+
+    ::ReleaseDC(NULL, hDC);

 #endif
 #endif

-       ::ReleaseDC(NULL, hDC);
-       return TRUE;
-}      
+}
+
+bool wxFontEnumeratorHelper::OnFont(const LPLOGFONT lf,
+                                    const LPTEXTMETRIC tm) const
+{
+    if ( m_enumEncodings )
+    {
+        // is this a new charset?
+        int cs = lf->lfCharSet;
+        if ( m_charsets.Index(cs) == wxNOT_FOUND )
+        {
+            wxConstCast(this, wxFontEnumeratorHelper)->m_charsets.Add(cs);
+
+            wxFontEncoding enc = wxGetFontEncFromCharSet(cs);
+            return m_fontEnum->OnFontEncoding(lf->lfFaceName,
+                                              wxFontMapper::GetEncodingName(enc));
+        }
+        else
+        {
+            // continue enumeration
+            return TRUE;
+        }
+    }
+
+    if ( m_fixedOnly )
+    {
+        // check that it's a fixed pitch font (there is *no* error here, the
+        // flag name is misleading!)
+        if ( tm->tmPitchAndFamily & TMPF_FIXED_PITCH )
+        {
+            // not a fixed pitch font
+            return TRUE;
+        }
+    }
+
+    if ( m_charset != DEFAULT_CHARSET )
+    {
+        // check that we have the right encoding
+        if ( lf->lfCharSet != m_charset )
+        {
+            return TRUE;
+        }
+    }
+    else // enumerating fonts in all charsets
+    {
+        // we can get the same facename twice or more in this case because it
+        // may exist in several charsets but we only want to return one copy of
+        // it (note that this can't happen for m_charset != DEFAULT_CHARSET)
+        if ( m_facenames.Index(lf->lfFaceName) != wxNOT_FOUND )
+        {
+            // continue enumeration
+            return TRUE;
+        }
+
+        wxConstCast(this, wxFontEnumeratorHelper)->
+            m_facenames.Add(lf->lfFaceName);
+    }
+
+    return m_fontEnum->OnFacename(lf->lfFaceName);
+}
+
+// ----------------------------------------------------------------------------
+// wxFontEnumerator
+// ----------------------------------------------------------------------------
+
+bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
+                                          bool fixedWidthOnly)
+{
+    wxFontEnumeratorHelper fe(this);
+    if ( fe.SetEncoding(encoding) )
+    {
+        fe.SetFixedOnly(fixedWidthOnly);
+
+        fe.DoEnumerate();
+    }
+    // else: no such fonts, unknown encoding
+
+    return TRUE;
+}

 
 

-bool wxFontEnumerator::OnFont(const wxFont& font)
+bool wxFontEnumerator::EnumerateEncodings(const wxString& family)

 {
 {

-    m_faceNames.Add(font.GetFaceName());
+    wxFontEnumeratorHelper fe(this);
+    fe.SetFamily(family);
+    fe.DoEnumerate();
+

     return TRUE;
 }
 
     return TRUE;
 }
 

+// ----------------------------------------------------------------------------
+// Windows callbacks
+// ----------------------------------------------------------------------------
+
+#ifndef __WXMICROWIN__
+int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
+                                  DWORD WXUNUSED(dwStyle), LONG lParam)
+{
+
+    // we used to process TrueType fonts only, but there doesn't seem to be any
+    // reasons to restrict ourselves to them here
+#if 0
+    // Get rid of any fonts that we don't want...
+    if ( dwStyle != TRUETYPE_FONTTYPE )
+    {
+        // continue enumeration
+        return TRUE;
+    }
+#endif // 0
+
+    wxFontEnumeratorHelper *fontEnum = (wxFontEnumeratorHelper *)lParam;
+
+    return fontEnum->OnFont(lplf, lptm);
+}
+#endif
+
+#endif // wxUSE_FONTMAP