src/gtk/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/font.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling and Julian Smart
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // ============================================================================
  11 // declarations
  12 // ============================================================================
  13
  14 // ----------------------------------------------------------------------------
  15 // headers
  16 // ----------------------------------------------------------------------------
  17
  18 // For compilers that support precompilation, includes "wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #include "wx/font.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/log.h"
  25     #include "wx/utils.h"
  26     #include "wx/settings.h"
  27     #include "wx/cmndata.h"
  28 #endif
  29
  30 #include "wx/fontutil.h"
  31 #include "wx/gdicmn.h"
  32 #include "wx/tokenzr.h"
  33
  34 #include <strings.h>
  35
  36 #include "wx/gtk/private.h"
  37 #include <gdk/gdkprivate.h>
  38
  39 // ----------------------------------------------------------------------------
  40 // constants
  41 // ----------------------------------------------------------------------------
  42
  43 // the default size (in points) for the fonts
  44 static const int wxDEFAULT_FONT_SIZE = 12;
  45
  46 // ----------------------------------------------------------------------------
  47 // wxScaledFontList: maps the font sizes to the GDK fonts for the given font
  48 // ----------------------------------------------------------------------------
  49
  50 WX_DECLARE_HASH_MAP(int, GdkFont *, wxIntegerHash, wxIntegerEqual,
  51                     wxScaledFontList);
  52
  53 // ----------------------------------------------------------------------------
  54 // wxFontRefData
  55 // ----------------------------------------------------------------------------
  56
  57 class wxFontRefData : public wxObjectRefData
  58 {
  59 public:
  60     // from broken down font parameters, also default ctor
  61     wxFontRefData(int size = -1,
  62                   int family = wxFONTFAMILY_DEFAULT,
  63                   int style = wxFONTSTYLE_NORMAL,
  64                   int weight = wxFONTWEIGHT_NORMAL,
  65                   bool underlined = false,
  66                   const wxString& faceName = wxEmptyString,
  67                   wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
  68
  69     // from XFLD
  70     wxFontRefData(const wxString& fontname);
  71
  72     // copy ctor
  73     wxFontRefData( const wxFontRefData& data );
  74
  75     virtual ~wxFontRefData();
  76
  77     // do we have the native font info?
  78     bool HasNativeFont() const
  79     {
  80         // we always have a Pango font description
  81         return true;
  82     }
  83
  84     // setters: all of them also take care to modify m_nativeFontInfo if we
  85     // have it so as to not lose the information not carried by our fields
  86     void SetPointSize(int pointSize);
  87     void SetFamily(int family);
  88     void SetStyle(int style);
  89     void SetWeight(int weight);
  90     void SetUnderlined(bool underlined);
  91     void SetFaceName(const wxString& facename);
  92     void SetEncoding(wxFontEncoding encoding);
  93
  94     void SetNoAntiAliasing( bool no = true ) { m_noAA = no; }
  95     bool GetNoAntiAliasing() const { return m_noAA; }
  96
  97     // and this one also modifies all the other font data fields
  98     void SetNativeFontInfo(const wxNativeFontInfo& info);
  99
 100 protected:
 101     // common part of all ctors
 102     void Init(int pointSize,
 103               int family,
 104               int style,
 105               int weight,
 106               bool underlined,
 107               const wxString& faceName,
 108               wxFontEncoding encoding);
 109
 110     // set all fields from (already initialized and valid) m_nativeFontInfo
 111     void InitFromNative();
 112
 113 private:
 114     // clear m_scaled_xfonts if any
 115     void ClearGdkFonts();
 116
 117     int             m_pointSize;
 118     int             m_family,
 119                     m_style,
 120                     m_weight;
 121     bool            m_underlined;
 122     wxString        m_faceName;
 123     wxFontEncoding  m_encoding;
 124     bool            m_noAA;      // No anti-aliasing
 125
 126     // The native font info, basicly an XFLD under GTK 1.2 and
 127     // the pango font description under GTK 2.0.
 128     wxNativeFontInfo m_nativeFontInfo;
 129
 130     friend class wxFont;
 131 };
 132
 133 // ----------------------------------------------------------------------------
 134 // wxFontRefData
 135 // ----------------------------------------------------------------------------
 136
 137 void wxFontRefData::Init(int pointSize,
 138                          int family,
 139                          int style,
 140                          int weight,
 141                          bool underlined,
 142                          const wxString& faceName,
 143                          wxFontEncoding encoding)
 144 {
 145     m_family = family == wxFONTFAMILY_DEFAULT ? wxFONTFAMILY_SWISS : family;
 146
 147     m_faceName = faceName;
 148
 149     // we accept both wxDEFAULT and wxNORMAL here - should we?
 150     m_style = style == wxDEFAULT ? wxFONTSTYLE_NORMAL : style;
 151     m_weight = weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight;
 152
 153     // and here, do we really want to forbid creation of the font of the size
 154     // 90 (the value of wxDEFAULT)??
 155     m_pointSize = pointSize == wxDEFAULT || pointSize == -1
 156                     ? wxDEFAULT_FONT_SIZE
 157                     : pointSize;
 158
 159     m_underlined = underlined;
 160     m_encoding = encoding;
 161
 162     m_noAA = false;
 163
 164     // Create native font info
 165     m_nativeFontInfo.description = pango_font_description_new();
 166
 167     // And set its values
 168     if (!m_faceName.empty())
 169     {
 170        pango_font_description_set_family( m_nativeFontInfo.description,
 171                                           wxGTK_CONV_SYS(m_faceName) );
 172     }
 173     else
 174     {
 175         switch (m_family)
 176         {
 177             case wxFONTFAMILY_MODERN:
 178             case wxFONTFAMILY_TELETYPE:
 179                pango_font_description_set_family( m_nativeFontInfo.description, "monospace" );
 180                break;
 181             case wxFONTFAMILY_ROMAN:
 182                pango_font_description_set_family( m_nativeFontInfo.description, "serif" );
 183                break;
 184             case wxFONTFAMILY_SWISS:
 185                // SWISS = sans serif
 186             default:
 187                pango_font_description_set_family( m_nativeFontInfo.description, "sans" );
 188                break;
 189         }
 190     }
 191
 192     SetStyle( m_style );
 193     SetPointSize( m_pointSize );
 194     SetWeight( m_weight );
 195 }
 196
 197 void wxFontRefData::InitFromNative()
 198 {
 199     m_noAA = false;
 200
 201     // Get native info
 202     PangoFontDescription *desc = m_nativeFontInfo.description;
 203
 204     // init fields
 205     m_faceName = wxGTK_CONV_BACK( pango_font_description_get_family( desc ) );
 206
 207     // Pango sometimes needs to have a size
 208     int pango_size = pango_font_description_get_size( desc );
 209     if (pango_size == 0)
 210         m_nativeFontInfo.SetPointSize(12);
 211
 212     m_pointSize = m_nativeFontInfo.GetPointSize();
 213     m_style = m_nativeFontInfo.GetStyle();
 214     m_weight = m_nativeFontInfo.GetWeight();
 215
 216     if (m_faceName == wxT("monospace"))
 217     {
 218         m_family = wxFONTFAMILY_TELETYPE;
 219     }
 220     else if (m_faceName == wxT("sans"))
 221     {
 222         m_family = wxFONTFAMILY_SWISS;
 223     }
 224     else if (m_faceName == wxT("serif"))
 225     {
 226         m_family = wxFONTFAMILY_ROMAN;
 227     }
 228     else
 229     {
 230         m_family = wxFONTFAMILY_UNKNOWN;
 231     }
 232
 233     // Pango description are never underlined (?)
 234     m_underlined = false;
 235
 236     // always with GTK+ 2
 237     m_encoding = wxFONTENCODING_UTF8;
 238 }
 239
 240 wxFontRefData::wxFontRefData( const wxFontRefData& data )
 241              : wxObjectRefData()
 242 {
 243     m_pointSize = data.m_pointSize;
 244     m_family = data.m_family;
 245     m_style = data.m_style;
 246     m_weight = data.m_weight;
 247
 248     m_underlined = data.m_underlined;
 249
 250     m_faceName = data.m_faceName;
 251     m_encoding = data.m_encoding;
 252
 253     m_noAA = data.m_noAA;
 254
 255     // Forces a copy of the internal data.  wxNativeFontInfo should probably
 256     // have a copy ctor and assignment operator to fix this properly but that
 257     // would break binary compatibility...
 258     m_nativeFontInfo.FromString(data.m_nativeFontInfo.ToString());
 259 }
 260
 261 wxFontRefData::wxFontRefData(int size, int family, int style,
 262                              int weight, bool underlined,
 263                              const wxString& faceName,
 264                              wxFontEncoding encoding)
 265 {
 266     Init(size, family, style, weight, underlined, faceName, encoding);
 267 }
 268
 269 wxFontRefData::wxFontRefData(const wxString& fontname)
 270 {
 271     m_nativeFontInfo.FromString( fontname );
 272
 273     InitFromNative();
 274 }
 275
 276 void wxFontRefData::ClearGdkFonts()
 277 {
 278 }
 279
 280 wxFontRefData::~wxFontRefData()
 281 {
 282     ClearGdkFonts();
 283 }
 284
 285 // ----------------------------------------------------------------------------
 286 // wxFontRefData SetXXX()
 287 // ----------------------------------------------------------------------------
 288
 289 void wxFontRefData::SetPointSize(int pointSize)
 290 {
 291     m_pointSize = pointSize;
 292
 293     m_nativeFontInfo.SetPointSize(pointSize);
 294 }
 295
 296 void wxFontRefData::SetFamily(int family)
 297 {
 298     m_family = family;
 299
 300     // TODO: what are we supposed to do with m_nativeFontInfo here?
 301 }
 302
 303 void wxFontRefData::SetStyle(int style)
 304 {
 305     m_style = style;
 306
 307     m_nativeFontInfo.SetStyle((wxFontStyle)style);
 308 }
 309
 310 void wxFontRefData::SetWeight(int weight)
 311 {
 312     m_weight = weight;
 313
 314     m_nativeFontInfo.SetWeight((wxFontWeight)weight);
 315 }
 316
 317 void wxFontRefData::SetUnderlined(bool underlined)
 318 {
 319     m_underlined = underlined;
 320
 321     // the XLFD doesn't have "underlined" field anyhow
 322 }
 323
 324 void wxFontRefData::SetFaceName(const wxString& facename)
 325 {
 326     m_faceName = facename;
 327
 328     m_nativeFontInfo.SetFaceName(facename);
 329 }
 330
 331 void wxFontRefData::SetEncoding(wxFontEncoding encoding)
 332 {
 333     m_encoding = encoding;
 334 }
 335
 336 void wxFontRefData::SetNativeFontInfo(const wxNativeFontInfo& info)
 337 {
 338     // previously cached fonts shouldn't be used
 339     ClearGdkFonts();
 340
 341     m_nativeFontInfo = info;
 342
 343     // set all the other font parameters from the native font info
 344     InitFromNative();
 345 }
 346
 347 // ----------------------------------------------------------------------------
 348 // wxFont creation
 349 // ----------------------------------------------------------------------------
 350
 351 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
 352
 353 wxFont::wxFont(const wxNativeFontInfo& info)
 354 {
 355     Create( info.GetPointSize(),
 356             info.GetFamily(),
 357             info.GetStyle(),
 358             info.GetWeight(),
 359             info.GetUnderlined(),
 360             info.GetFaceName(),
 361             info.GetEncoding() );
 362 }
 363
 364 bool wxFont::Create( int pointSize,
 365                      int family,
 366                      int style,
 367                      int weight,
 368                      bool underlined,
 369                      const wxString& face,
 370                      wxFontEncoding encoding)
 371 {
 372     UnRef();
 373
 374     m_refData = new wxFontRefData(pointSize, family, style, weight,
 375                                   underlined, face, encoding);
 376
 377     return true;
 378 }
 379
 380 bool wxFont::Create(const wxString& fontname)
 381 {
 382     // VZ: does this really happen?
 383     if ( fontname.empty() )
 384     {
 385         *this = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 386
 387         return true;
 388     }
 389
 390     m_refData = new wxFontRefData(fontname);
 391
 392     return true;
 393 }
 394
 395 void wxFont::Unshare()
 396 {
 397     if (!m_refData)
 398     {
 399         m_refData = new wxFontRefData();
 400     }
 401     else
 402     {
 403         wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 404         UnRef();
 405         m_refData = ref;
 406     }
 407 }
 408
 409 wxFont::~wxFont()
 410 {
 411 }
 412
 413 // ----------------------------------------------------------------------------
 414 // accessors
 415 // ----------------------------------------------------------------------------
 416
 417 int wxFont::GetPointSize() const
 418 {
 419     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 420
 421 #if wxUSE_PANGO
 422     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetPointSize()
 423                                        : M_FONTDATA->m_pointSize;
 424 #else
 425     return M_FONTDATA->m_pointSize;
 426 #endif
 427 }
 428
 429 wxString wxFont::GetFaceName() const
 430 {
 431     wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid font") );
 432
 433 #if wxUSE_PANGO
 434     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetFaceName()
 435                                        : M_FONTDATA->m_faceName;
 436 #else
 437     return M_FONTDATA->m_faceName;
 438 #endif
 439 }
 440
 441 int wxFont::GetFamily() const
 442 {
 443     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 444
 445 #if wxUSE_PANGO
 446     int ret = M_FONTDATA->m_family;
 447     if (M_FONTDATA->HasNativeFont())
 448         // wxNativeFontInfo::GetFamily is expensive, must not call more than once
 449         ret = M_FONTDATA->m_nativeFontInfo.GetFamily();
 450
 451     if (ret == wxFONTFAMILY_DEFAULT)
 452         ret = M_FONTDATA->m_family;
 453
 454     return ret;
 455 #else
 456     return M_FONTDATA->m_family;
 457 #endif
 458 }
 459
 460 int wxFont::GetStyle() const
 461 {
 462     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 463
 464 #if wxUSE_PANGO
 465     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetStyle()
 466                                        : M_FONTDATA->m_style;
 467 #else
 468     return M_FONTDATA->m_style;
 469 #endif
 470 }
 471
 472 int wxFont::GetWeight() const
 473 {
 474     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 475
 476 #if wxUSE_PANGO
 477     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetWeight()
 478                                        : M_FONTDATA->m_weight;
 479 #else
 480     return M_FONTDATA->m_weight;
 481 #endif
 482 }
 483
 484 bool wxFont::GetUnderlined() const
 485 {
 486     wxCHECK_MSG( Ok(), false, wxT("invalid font") );
 487
 488     return M_FONTDATA->m_underlined;
 489 }
 490
 491 wxFontEncoding wxFont::GetEncoding() const
 492 {
 493     wxCHECK_MSG( Ok(), wxFONTENCODING_SYSTEM, wxT("invalid font") );
 494
 495     return M_FONTDATA->m_encoding;
 496 }
 497
 498 bool wxFont::GetNoAntiAliasing() const
 499 {
 500     wxCHECK_MSG( Ok(), false, wxT("invalid font") );
 501
 502     return M_FONTDATA->m_noAA;
 503 }
 504
 505 const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
 506 {
 507     wxCHECK_MSG( Ok(), (wxNativeFontInfo *)NULL, wxT("invalid font") );
 508
 509     return &(M_FONTDATA->m_nativeFontInfo);
 510 }
 511
 512 bool wxFont::IsFixedWidth() const
 513 {
 514     wxCHECK_MSG( Ok(), false, wxT("invalid font") );
 515
 516     return wxFontBase::IsFixedWidth();
 517 }
 518
 519 // ----------------------------------------------------------------------------
 520 // change font attributes
 521 // ----------------------------------------------------------------------------
 522
 523 void wxFont::SetPointSize(int pointSize)
 524 {
 525     Unshare();
 526
 527     M_FONTDATA->SetPointSize(pointSize);
 528 }
 529
 530 void wxFont::SetFamily(int family)
 531 {
 532     Unshare();
 533
 534     M_FONTDATA->SetFamily(family);
 535 }
 536
 537 void wxFont::SetStyle(int style)
 538 {
 539     Unshare();
 540
 541     M_FONTDATA->SetStyle(style);
 542 }
 543
 544 void wxFont::SetWeight(int weight)
 545 {
 546     Unshare();
 547
 548     M_FONTDATA->SetWeight(weight);
 549 }
 550
 551 void wxFont::SetFaceName(const wxString& faceName)
 552 {
 553     Unshare();
 554
 555     M_FONTDATA->SetFaceName(faceName);
 556 }
 557
 558 void wxFont::SetUnderlined(bool underlined)
 559 {
 560     Unshare();
 561
 562     M_FONTDATA->SetUnderlined(underlined);
 563 }
 564
 565 void wxFont::SetEncoding(wxFontEncoding encoding)
 566 {
 567     Unshare();
 568
 569     M_FONTDATA->SetEncoding(encoding);
 570 }
 571
 572 void wxFont::DoSetNativeFontInfo( const wxNativeFontInfo& info )
 573 {
 574     Unshare();
 575
 576     M_FONTDATA->SetNativeFontInfo( info );
 577 }
 578
 579 void wxFont::SetNoAntiAliasing( bool no )
 580 {
 581     Unshare();
 582
 583     M_FONTDATA->SetNoAntiAliasing( no );
 584 }