src/common/fontmgrcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/fontmgrcmn.cpp
   3 // Purpose:     font management for ports that don't have their own
   4 // Author:      Vaclav Slavik
   5 // Created:     2006-11-18
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   8 //              (c) 2006 REA Elektronik GmbH
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #include "wx/private/fontmgr.h"
  20
  21 #include "wx/listimpl.cpp"
  22 #include "wx/hashmap.h"
  23
  24 WX_DECLARE_LIST(wxFontInstance, wxFontInstanceList);
  25 WX_DEFINE_LIST(wxFontInstanceList)
  26 WX_DEFINE_LIST(wxFontBundleList)
  27
  28 WX_DECLARE_HASH_MAP(wxString, wxFontBundle*,
  29                     wxStringHash, wxStringEqual,
  30                     wxFontBundleHashBase);
  31 // in STL build, hash class is typedef to a template, so it can't be forward
  32 // declared, as we do; solve it by having a dummy class:
  33 class wxFontBundleHash : public wxFontBundleHashBase
  34 {
  35 };
  36
  37 // ============================================================================
  38 // implementation
  39 // ============================================================================
  40
  41 // ----------------------------------------------------------------------------
  42 // wxFontFaceBase
  43 // ----------------------------------------------------------------------------
  44
  45 wxFontFaceBase::wxFontFaceBase()
  46     : m_refCnt(0)
  47 {
  48     m_instances = new wxFontInstanceList;
  49     m_instances->DeleteContents(true);
  50 }
  51
  52 wxFontFaceBase::~wxFontFaceBase()
  53 {
  54     delete m_instances;
  55 }
  56
  57 void wxFontFaceBase::Acquire()
  58 {
  59     m_refCnt++;
  60 }
  61
  62 void wxFontFaceBase::Release()
  63 {
  64     if ( --m_refCnt == 0 )
  65     {
  66         m_instances->Clear();
  67     }
  68 }
  69
  70 wxFontInstance *wxFontFaceBase::GetFontInstance(float ptSize, bool aa)
  71 {
  72     wxASSERT_MSG( m_refCnt > 0, wxT("font library not loaded!") );
  73
  74     for ( wxFontInstanceList::const_iterator i = m_instances->begin();
  75           i != m_instances->end(); ++i )
  76     {
  77         if ( (*i)->GetPointSize() == ptSize && (*i)->IsAntiAliased() == aa )
  78             return *i;
  79     }
  80
  81     wxFontInstance *i = CreateFontInstance(ptSize, aa);
  82     m_instances->Append(i);
  83     return i;
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // wxFontBundleBase
  88 // ----------------------------------------------------------------------------
  89
  90 wxFontBundleBase::wxFontBundleBase()
  91 {
  92     for (int i = 0; i < FaceType_Max; i++)
  93         m_faces[i] = NULL;
  94 }
  95
  96 wxFontBundleBase::~wxFontBundleBase()
  97 {
  98     for (int i = 0; i < FaceType_Max; i++)
  99         delete m_faces[i];
 100 }
 101
 102 wxFontFace *wxFontBundleBase::GetFace(FaceType type) const
 103 {
 104     wxFontFace *f = m_faces[type];
 105
 106     wxCHECK_MSG( f, NULL, wxT("no such face in font bundle") );
 107
 108     f->Acquire();
 109
 110     return f;
 111 }
 112
 113 wxFontFace *
 114 wxFontBundleBase::GetFaceForFont(const wxFontMgrFontRefData& font) const
 115 {
 116     wxASSERT_MSG( font.GetFaceName().empty() ||
 117                   GetName().CmpNoCase(font.GetFaceName()) == 0,
 118                   wxT("calling GetFaceForFont for incompatible font") );
 119
 120     int type = FaceType_Regular;
 121
 122     if ( font.GetWeight() == wxBOLD )
 123         type |= FaceType_Bold;
 124
 125     // FIXME -- this should read "if ( font->GetStyle() == wxITALIC )",
 126     // but since MGL neither DFB supports slant, we try to display it with
 127     // italic face (better than nothing...)
 128     if ( font.GetStyle() == wxITALIC || font.GetStyle() == wxSLANT )
 129     {
 130         if ( HasFace((FaceType)(type | FaceType_Italic)) )
 131             type |= FaceType_Italic;
 132     }
 133
 134     if ( !HasFace((FaceType)type) )
 135     {
 136         // if we can't get the exact font requested, substitute it with
 137         // some other variant:
 138         for (int i = 0; i < FaceType_Max; i++)
 139         {
 140             if ( HasFace((FaceType)i) )
 141                 return GetFace((FaceType)i);
 142         }
 143
 144         wxFAIL_MSG( wxT("no face") );
 145         return NULL;
 146     }
 147
 148     return GetFace((FaceType)type);
 149 }
 150
 151 // ----------------------------------------------------------------------------
 152 // wxFontsManagerBase
 153 // ----------------------------------------------------------------------------
 154
 155 wxFontsManager *wxFontsManagerBase::ms_instance = NULL;
 156
 157 wxFontsManagerBase::wxFontsManagerBase()
 158 {
 159     m_hash = new wxFontBundleHash();
 160     m_list = new wxFontBundleList;
 161     m_list->DeleteContents(true);
 162 }
 163
 164 wxFontsManagerBase::~wxFontsManagerBase()
 165 {
 166     delete m_hash;
 167     delete m_list;
 168 }
 169
 170 /* static */
 171 wxFontsManager *wxFontsManagerBase::Get()
 172 {
 173     if ( !ms_instance )
 174         ms_instance = new wxFontsManager();
 175     return ms_instance;
 176 }
 177
 178 /* static */
 179 void wxFontsManagerBase::CleanUp()
 180 {
 181     wxDELETE(ms_instance);
 182 }
 183
 184 wxFontBundle *wxFontsManagerBase::GetBundle(const wxString& name) const
 185 {
 186     return (*m_hash)[name.Lower()];
 187 }
 188
 189 wxFontBundle *
 190 wxFontsManagerBase::GetBundleForFont(const wxFontMgrFontRefData& font) const
 191 {
 192     wxFontBundle *bundle = NULL;
 193
 194     wxString facename = font.GetFaceName();
 195     if ( !facename.empty() )
 196         bundle = GetBundle(facename);
 197
 198     if ( !bundle )
 199     {
 200         facename = GetDefaultFacename((wxFontFamily)font.GetFamily());
 201         if ( !facename.empty() )
 202             bundle = GetBundle(facename);
 203     }
 204
 205     if ( !bundle )
 206     {
 207        if ( m_list->GetFirst() )
 208            bundle = m_list->GetFirst()->GetData();
 209        else
 210            wxFAIL_MSG(wxT("Fatal error, no fonts available!"));
 211     }
 212
 213     return bundle;
 214 }
 215
 216 void wxFontsManagerBase::AddBundle(wxFontBundle *bundle)
 217 {
 218     (*m_hash)[bundle->GetName().Lower()] = bundle;
 219     m_list->Append(bundle);
 220 }
 221
 222
 223 // ----------------------------------------------------------------------------
 224 // wxFontMgrFontRefData
 225 // ----------------------------------------------------------------------------
 226
 227 wxFontMgrFontRefData::wxFontMgrFontRefData(int size,
 228                                            wxFontFamily family,
 229                                            wxFontStyle style,
 230                                            wxFontWeight weight,
 231                                            bool underlined,
 232                                            const wxString& faceName,
 233                                            wxFontEncoding encoding)
 234 {
 235     if ( family == wxFONTFAMILY_DEFAULT )
 236         family = wxFONTFAMILY_SWISS;
 237     if ( size == wxDEFAULT )
 238         size = 12;
 239
 240     m_info.family = (wxFontFamily)family;
 241     m_info.faceName = faceName;
 242     m_info.style = (wxFontStyle)style;
 243     m_info.weight = (wxFontWeight)weight;
 244     m_info.pointSize = size;
 245     m_info.underlined = underlined;
 246     m_info.encoding = encoding;
 247
 248     m_fontFace = NULL;
 249     m_fontBundle = NULL;
 250     m_fontValid = false;
 251 }
 252
 253 wxFontMgrFontRefData::wxFontMgrFontRefData(const wxFontMgrFontRefData& data)
 254 {
 255     m_info = data.m_info;
 256
 257     m_fontFace = data.m_fontFace;
 258     m_fontBundle = data.m_fontBundle;
 259     m_fontValid = data.m_fontValid;
 260     if ( m_fontFace )
 261         m_fontFace->Acquire();
 262 }
 263
 264 wxFontMgrFontRefData::~wxFontMgrFontRefData()
 265 {
 266     if ( m_fontFace )
 267         m_fontFace->Release();
 268 }
 269
 270 wxFontBundle *wxFontMgrFontRefData::GetFontBundle() const
 271 {
 272     wxConstCast(this, wxFontMgrFontRefData)->EnsureValidFont();
 273     return m_fontBundle;
 274 }
 275
 276 wxFontInstance *
 277 wxFontMgrFontRefData::GetFontInstance(float scale, bool antialiased) const
 278 {
 279     wxConstCast(this, wxFontMgrFontRefData)->EnsureValidFont();
 280     return m_fontFace->GetFontInstance(m_info.pointSize * scale,
 281                                        antialiased);
 282 }
 283
 284 void wxFontMgrFontRefData::SetPointSize(int pointSize)
 285 {
 286     m_info.pointSize = pointSize;
 287     m_fontValid = false;
 288 }
 289
 290 void wxFontMgrFontRefData::SetFamily(wxFontFamily family)
 291 {
 292     m_info.family = family;
 293     m_fontValid = false;
 294 }
 295
 296 void wxFontMgrFontRefData::SetStyle(wxFontStyle style)
 297 {
 298     m_info.style = style;
 299     m_fontValid = false;
 300 }
 301
 302 void wxFontMgrFontRefData::SetWeight(wxFontWeight weight)
 303 {
 304     m_info.weight = weight;
 305     m_fontValid = false;
 306 }
 307
 308 void wxFontMgrFontRefData::SetFaceName(const wxString& faceName)
 309 {
 310     m_info.faceName = faceName;
 311     m_fontValid = false;
 312 }
 313
 314 void wxFontMgrFontRefData::SetUnderlined(bool underlined)
 315 {
 316     m_info.underlined = underlined;
 317     m_fontValid = false;
 318 }
 319
 320 void wxFontMgrFontRefData::SetEncoding(wxFontEncoding encoding)
 321 {
 322     m_info.encoding = encoding;
 323     m_fontValid = false;
 324 }
 325
 326 void wxFontMgrFontRefData::EnsureValidFont()
 327 {
 328     if ( !m_fontValid )
 329     {
 330         wxFontFace *old = m_fontFace;
 331
 332         m_fontBundle = wxFontsManager::Get()->GetBundleForFont(*this);
 333         m_fontFace = m_fontBundle->GetFaceForFont(*this);
 334
 335         if ( old )
 336             old->Release();
 337     }
 338 }