src/gtk/font.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/font.cpp
// Purpose:     wxFont for wxGTK
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling and Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

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

#include "wx/font.h"

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/utils.h"
    #include "wx/settings.h"
    #include "wx/gdicmn.h"
#endif

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

#include "wx/gtk/private.h"

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// the default size (in points) for the fonts
static const int wxDEFAULT_FONT_SIZE = 12;

// ----------------------------------------------------------------------------
// wxFontRefData
// ----------------------------------------------------------------------------

class wxFontRefData : public wxGDIRefData
{
public:
    // from broken down font parameters, also default ctor
    wxFontRefData(int size = -1,
                  wxFontFamily family = wxFONTFAMILY_DEFAULT,
                  wxFontStyle style = wxFONTSTYLE_NORMAL,
                  wxFontWeight weight = wxFONTWEIGHT_NORMAL,
                  bool underlined = false,
                  bool strikethrough = false,
                  const wxString& faceName = wxEmptyString,
                  wxFontEncoding encoding = wxFONTENCODING_DEFAULT);

    wxFontRefData(const wxString& nativeFontInfoString);

    // copy ctor
    wxFontRefData( const wxFontRefData& data );

    virtual ~wxFontRefData();

    // setters: all of them also take care to modify m_nativeFontInfo if we
    // have it so as to not lose the information not carried by our fields
    void SetPointSize(int pointSize);
    void SetFamily(wxFontFamily family);
    void SetStyle(wxFontStyle style);
    void SetWeight(wxFontWeight weight);
    void SetUnderlined(bool underlined);
    void SetStrikethrough(bool strikethrough);
    bool SetFaceName(const wxString& facename);
    void SetEncoding(wxFontEncoding encoding);

    // and this one also modifies all the other font data fields
    void SetNativeFontInfo(const wxNativeFontInfo& info);

protected:
    // common part of all ctors
    void Init(int pointSize,
              wxFontFamily family,
              wxFontStyle style,
              wxFontWeight weight,
              bool underlined,
              bool strikethrough,
              const wxString& faceName,
              wxFontEncoding encoding);

    // set all fields from (already initialized and valid) m_nativeFontInfo
    void InitFromNative();

private:
    // The native font info: basically a PangoFontDescription, plus
    // 'underlined' and 'strikethrough' attributes not supported by Pango.
    wxNativeFontInfo m_nativeFontInfo;

    friend class wxFont;
};

#define M_FONTDATA ((wxFontRefData*)m_refData)

// ----------------------------------------------------------------------------
// wxFontRefData
// ----------------------------------------------------------------------------

void wxFontRefData::Init(int pointSize,
                         wxFontFamily family,
                         wxFontStyle style,
                         wxFontWeight weight,
                         bool underlined,
                         bool strikethrough,
                         const wxString& faceName,
                         wxFontEncoding WXUNUSED(encoding))
{
    if (family == wxFONTFAMILY_DEFAULT)
        family = wxFONTFAMILY_SWISS;

    // Create native font info
    m_nativeFontInfo.description = pango_font_description_new();

    // And set its values
    if (!faceName.empty())
    {
        pango_font_description_set_family( m_nativeFontInfo.description,
                                           wxGTK_CONV_SYS(faceName) );
    }
    else
    {
        SetFamily(family);
    }

    SetStyle( style == wxDEFAULT ? wxFONTSTYLE_NORMAL : style );
    SetPointSize( (pointSize == wxDEFAULT || pointSize == -1)
                    ? wxDEFAULT_FONT_SIZE
                    : pointSize );
    SetWeight( weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight );
    SetUnderlined( underlined );
    SetStrikethrough( strikethrough );
}

void wxFontRefData::InitFromNative()
{
    // Get native info
    PangoFontDescription *desc = m_nativeFontInfo.description;

    // Pango sometimes needs to have a size
    int pango_size = pango_font_description_get_size( desc );
    if (pango_size == 0)
        m_nativeFontInfo.SetPointSize(wxDEFAULT_FONT_SIZE);
}

wxFontRefData::wxFontRefData( const wxFontRefData& data )
             : wxGDIRefData()
{
    // Forces a copy of the internal data.  wxNativeFontInfo should probably
    // have a copy ctor and assignment operator to fix this properly but that
    // would break binary compatibility...
    m_nativeFontInfo.FromString(data.m_nativeFontInfo.ToString());
}

wxFontRefData::wxFontRefData(int size, wxFontFamily family, wxFontStyle style,
                             wxFontWeight weight, bool underlined, bool strikethrough,
                             const wxString& faceName,
                             wxFontEncoding encoding)
{
    Init(size, family, style, weight, underlined, strikethrough, faceName, encoding);
}

wxFontRefData::wxFontRefData(const wxString& nativeFontInfoString)
{
    m_nativeFontInfo.FromString( nativeFontInfoString );

    InitFromNative();
}

wxFontRefData::~wxFontRefData()
{
}

// ----------------------------------------------------------------------------
// wxFontRefData SetXXX()
// ----------------------------------------------------------------------------

void wxFontRefData::SetPointSize(int pointSize)
{
    m_nativeFontInfo.SetPointSize(pointSize);
}

/*
    NOTE: disabled because pango_font_description_set_absolute_size() and
          wxDC::GetCharHeight() do not mix well: setting with the former a pixel
          size of "30" makes the latter return 36...
          Besides, we need to return GetPointSize() a point size value even if
          SetPixelSize() was used and this would require further changes
          (and use of pango_font_description_get_size_is_absolute in some places).

bool wxFontRefData::SetPixelSize(const wxSize& pixelSize)
{
    wxCHECK_MSG( pixelSize.GetWidth() >= 0 && pixelSize.GetHeight() > 0, false,
                 "Negative values for the pixel size or zero pixel height are not allowed" );

    if (wx_pango_version_check(1,8,0) != NULL ||
        pixelSize.GetWidth() != 0)
    {
        // NOTE: pango_font_description_set_absolute_size() only sets the font height;
        //       if the user set the pixel width of the font explicitly or the pango
        //       library is too old, we cannot proceed
        return false;
    }

    pango_font_description_set_absolute_size( m_nativeFontInfo.description,
                                              pixelSize.GetHeight() * PANGO_SCALE );

    return true;
}
*/

void wxFontRefData::SetFamily(wxFontFamily family)
{
    m_nativeFontInfo.SetFamily(family);
}

void wxFontRefData::SetStyle(wxFontStyle style)
{
    m_nativeFontInfo.SetStyle(style);
}

void wxFontRefData::SetWeight(wxFontWeight weight)
{
    m_nativeFontInfo.SetWeight(weight);
}

void wxFontRefData::SetUnderlined(bool underlined)
{
    m_nativeFontInfo.SetUnderlined(underlined);
}

void wxFontRefData::SetStrikethrough(bool strikethrough)
{
    m_nativeFontInfo.SetStrikethrough(strikethrough);
}

bool wxFontRefData::SetFaceName(const wxString& facename)
{
    return m_nativeFontInfo.SetFaceName(facename);
}

void wxFontRefData::SetEncoding(wxFontEncoding WXUNUSED(encoding))
{
    // with GTK+ 2 Pango always uses UTF8 internally, we cannot change it
}

void wxFontRefData::SetNativeFontInfo(const wxNativeFontInfo& info)
{
    m_nativeFontInfo = info;

    // set all the other font parameters from the native font info
    InitFromNative();
}

// ----------------------------------------------------------------------------
// wxFont creation
// ----------------------------------------------------------------------------

wxFont::wxFont(const wxNativeFontInfo& info)
{
    Create( info.GetPointSize(),
            info.GetFamily(),
            info.GetStyle(),
            info.GetWeight(),
            info.GetUnderlined(),
            info.GetFaceName(),
            info.GetEncoding() );

    if ( info.GetStrikethrough() )
        SetStrikethrough(true);
}

wxFont::wxFont(int pointSize,
               wxFontFamily family,
               int flags,
               const wxString& face,
               wxFontEncoding encoding)
{
    m_refData = new wxFontRefData(pointSize, family,
                                  GetStyleFromFlags(flags),
                                  GetWeightFromFlags(flags),
                                  GetUnderlinedFromFlags(flags),
                                  GetStrikethroughFromFlags(flags),
                                  face, encoding);
}

bool wxFont::Create( int pointSize,
                     wxFontFamily family,
                     wxFontStyle style,
                     wxFontWeight weight,
                     bool underlined,
                     const wxString& face,
                     wxFontEncoding encoding )
{
    UnRef();

    m_refData = new wxFontRefData(pointSize, family, style, weight,
                                  underlined, false, face, encoding);

    return true;
}

bool wxFont::Create(const wxString& fontname)
{
    // VZ: does this really happen?
    if ( fontname.empty() )
    {
        *this = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);

        return true;
    }

    m_refData = new wxFontRefData(fontname);

    return true;
}

wxFont::~wxFont()
{
}

// ----------------------------------------------------------------------------
// accessors
// ----------------------------------------------------------------------------

int wxFont::GetPointSize() const
{
    wxCHECK_MSG( IsOk(), 0, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetPointSize();
}

wxString wxFont::GetFaceName() const
{
    wxCHECK_MSG( IsOk(), wxEmptyString, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetFaceName();
}

wxFontFamily wxFont::DoGetFamily() const
{
    return M_FONTDATA->m_nativeFontInfo.GetFamily();
}

wxFontStyle wxFont::GetStyle() const
{
    wxCHECK_MSG( IsOk(), wxFONTSTYLE_MAX, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetStyle();
}

wxFontWeight wxFont::GetWeight() const
{
    wxCHECK_MSG( IsOk(), wxFONTWEIGHT_MAX, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetWeight();
}

bool wxFont::GetUnderlined() const
{
    wxCHECK_MSG( IsOk(), false, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetUnderlined();
}

bool wxFont::GetStrikethrough() const
{
    wxCHECK_MSG( IsOk(), false, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetStrikethrough();
}

wxFontEncoding wxFont::GetEncoding() const
{
    wxCHECK_MSG( IsOk(), wxFONTENCODING_SYSTEM, wxT("invalid font") );

    return wxFONTENCODING_UTF8;
        // Pango always uses UTF8... see also SetEncoding()
}

const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
{
    wxCHECK_MSG( IsOk(), NULL, wxT("invalid font") );

    return &(M_FONTDATA->m_nativeFontInfo);
}

bool wxFont::IsFixedWidth() const
{
    wxCHECK_MSG( IsOk(), false, wxT("invalid font") );

    return wxFontBase::IsFixedWidth();
}

// ----------------------------------------------------------------------------
// change font attributes
// ----------------------------------------------------------------------------

void wxFont::SetPointSize(int pointSize)
{
    AllocExclusive();

    M_FONTDATA->SetPointSize(pointSize);
}

void wxFont::SetFamily(wxFontFamily family)
{
    AllocExclusive();

    M_FONTDATA->SetFamily(family);
}

void wxFont::SetStyle(wxFontStyle style)
{
    AllocExclusive();

    M_FONTDATA->SetStyle(style);
}

void wxFont::SetWeight(wxFontWeight weight)
{
    AllocExclusive();

    M_FONTDATA->SetWeight(weight);
}

bool wxFont::SetFaceName(const wxString& faceName)
{
    AllocExclusive();

    return M_FONTDATA->SetFaceName(faceName) &&
           wxFontBase::SetFaceName(faceName);
}

void wxFont::SetUnderlined(bool underlined)
{
    AllocExclusive();

    M_FONTDATA->SetUnderlined(underlined);
}

void wxFont::SetStrikethrough(bool strikethrough)
{
    AllocExclusive();

    M_FONTDATA->SetStrikethrough(strikethrough);
}

void wxFont::SetEncoding(wxFontEncoding encoding)
{
    AllocExclusive();

    M_FONTDATA->SetEncoding(encoding);
}

void wxFont::DoSetNativeFontInfo( const wxNativeFontInfo& info )
{
    AllocExclusive();

    M_FONTDATA->SetNativeFontInfo( info );
}

wxGDIRefData* wxFont::CreateGDIRefData() const
{
    return new wxFontRefData;
}

wxGDIRefData* wxFont::CloneGDIRefData(const wxGDIRefData* data) const
{
    return new wxFontRefData(*static_cast<const wxFontRefData*>(data));
}

bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
{
    if (!IsOk() || !(GetUnderlined() || GetStrikethrough()))
        return false;

    PangoAttrList* attrs = pango_attr_list_new();
    PangoAttribute* a;

    if (wx_pango_version_check(1,16,0))
    {
        // a PangoLayout which has leading/trailing spaces with underlined font
        // is not correctly drawn by this pango version: Pango won't underline the spaces.
        // This can be a problem; e.g. wxHTML rendering of underlined text relies on
        // this behaviour. To workaround this problem, we use a special hack here
        // suggested by pango maintainer Behdad Esfahbod: we prepend and append two
        // empty space characters and give them a dummy colour attribute.
        // This will force Pango to underline the leading/trailing spaces, too.

        const char* text = pango_layout_get_text(layout);
        const size_t n = strlen(text);
        if ((n > 0 && text[0] == ' ') || (n > 1 && text[n - 1] == ' '))
        {
            wxCharBuffer buf(n + 6);
            // copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data(), "\342\200\214", 3);
            // copy the user string
            memcpy(buf.data() + 3, text, n);
            // copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data() + 3 + n, "\342\200\214", 3);

            pango_layout_set_text(layout, buf, n + 6);

            // Add dummy attributes (use colour as it's invisible anyhow for 0
            // width spaces) to ensure that the spaces in the beginning/end of the
            // string are underlined too.
            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = 0;
            a->end_index = 3;
            pango_attr_list_insert(attrs, a);

            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = n + 3;
            a->end_index = n + 6;
            pango_attr_list_insert(attrs, a);
        }
    }
    if (GetUnderlined())
    {
        a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
        pango_attr_list_insert(attrs, a);
    }
    if (GetStrikethrough())
    {
        a = pango_attr_strikethrough_new(true);
        pango_attr_list_insert(attrs, a);
    }

    pango_layout_set_attributes(layout, attrs);
    pango_attr_list_unref(attrs);

    return true;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/font.cpp
	3	// Purpose: wxFont for wxGTK
	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/gdicmn.h"
	28	#endif
	29
	30	#include "wx/fontutil.h"
	31	#include "wx/tokenzr.h"
	32
	33	#include "wx/gtk/private.h"
	34
	35	// ----------------------------------------------------------------------------
	36	// constants
	37	// ----------------------------------------------------------------------------
	38
	39	// the default size (in points) for the fonts
	40	static const int wxDEFAULT_FONT_SIZE = 12;
	41
	42	// ----------------------------------------------------------------------------
	43	// wxFontRefData
	44	// ----------------------------------------------------------------------------
	45
	46	class wxFontRefData : public wxGDIRefData
	47	{
	48	public:
	49	// from broken down font parameters, also default ctor
	50	wxFontRefData(int size = -1,
	51	wxFontFamily family = wxFONTFAMILY_DEFAULT,
	52	wxFontStyle style = wxFONTSTYLE_NORMAL,
	53	wxFontWeight weight = wxFONTWEIGHT_NORMAL,
	54	bool underlined = false,
	55	bool strikethrough = false,
	56	const wxString& faceName = wxEmptyString,
	57	wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
	58
	59	wxFontRefData(const wxString& nativeFontInfoString);
	60
	61	// copy ctor
	62	wxFontRefData( const wxFontRefData& data );
	63
	64	virtual ~wxFontRefData();
	65
	66	// setters: all of them also take care to modify m_nativeFontInfo if we
	67	// have it so as to not lose the information not carried by our fields
	68	void SetPointSize(int pointSize);
	69	void SetFamily(wxFontFamily family);
	70	void SetStyle(wxFontStyle style);
	71	void SetWeight(wxFontWeight weight);
	72	void SetUnderlined(bool underlined);
	73	void SetStrikethrough(bool strikethrough);
	74	bool SetFaceName(const wxString& facename);
	75	void SetEncoding(wxFontEncoding encoding);
	76
	77	// and this one also modifies all the other font data fields
	78	void SetNativeFontInfo(const wxNativeFontInfo& info);
	79
	80	protected:
	81	// common part of all ctors
	82	void Init(int pointSize,
	83	wxFontFamily family,
	84	wxFontStyle style,
	85	wxFontWeight weight,
	86	bool underlined,
	87	bool strikethrough,
	88	const wxString& faceName,
	89	wxFontEncoding encoding);
	90
	91	// set all fields from (already initialized and valid) m_nativeFontInfo
	92	void InitFromNative();
	93
	94	private:
	95	// The native font info: basically a PangoFontDescription, plus
	96	// 'underlined' and 'strikethrough' attributes not supported by Pango.
	97	wxNativeFontInfo m_nativeFontInfo;
	98
	99	friend class wxFont;
	100	};
	101
	102	#define M_FONTDATA ((wxFontRefData*)m_refData)
	103
	104	// ----------------------------------------------------------------------------
	105	// wxFontRefData
	106	// ----------------------------------------------------------------------------
	107
	108	void wxFontRefData::Init(int pointSize,
	109	wxFontFamily family,
	110	wxFontStyle style,
	111	wxFontWeight weight,
	112	bool underlined,
	113	bool strikethrough,
	114	const wxString& faceName,
	115	wxFontEncoding WXUNUSED(encoding))
	116	{
	117	if (family == wxFONTFAMILY_DEFAULT)
	118	family = wxFONTFAMILY_SWISS;
	119
	120	// Create native font info
	121	m_nativeFontInfo.description = pango_font_description_new();
	122
	123	// And set its values
	124	if (!faceName.empty())
	125	{
	126	pango_font_description_set_family( m_nativeFontInfo.description,
	127	wxGTK_CONV_SYS(faceName) );
	128	}
	129	else
	130	{
	131	SetFamily(family);
	132	}
	133
	134	SetStyle( style == wxDEFAULT ? wxFONTSTYLE_NORMAL : style );
	135	SetPointSize( (pointSize == wxDEFAULT \|\| pointSize == -1)
	136	? wxDEFAULT_FONT_SIZE
	137	: pointSize );
	138	SetWeight( weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight );
	139	SetUnderlined( underlined );
	140	SetStrikethrough( strikethrough );
	141	}
	142
	143	void wxFontRefData::InitFromNative()
	144	{
	145	// Get native info
	146	PangoFontDescription *desc = m_nativeFontInfo.description;
	147
	148	// Pango sometimes needs to have a size
	149	int pango_size = pango_font_description_get_size( desc );
	150	if (pango_size == 0)
	151	m_nativeFontInfo.SetPointSize(wxDEFAULT_FONT_SIZE);
	152	}
	153
	154	wxFontRefData::wxFontRefData( const wxFontRefData& data )
	155	: wxGDIRefData()
	156	{
	157	// Forces a copy of the internal data. wxNativeFontInfo should probably
	158	// have a copy ctor and assignment operator to fix this properly but that
	159	// would break binary compatibility...
	160	m_nativeFontInfo.FromString(data.m_nativeFontInfo.ToString());
	161	}
	162
	163	wxFontRefData::wxFontRefData(int size, wxFontFamily family, wxFontStyle style,
	164	wxFontWeight weight, bool underlined, bool strikethrough,
	165	const wxString& faceName,
	166	wxFontEncoding encoding)
	167	{
	168	Init(size, family, style, weight, underlined, strikethrough, faceName, encoding);
	169	}
	170
	171	wxFontRefData::wxFontRefData(const wxString& nativeFontInfoString)
	172	{
	173	m_nativeFontInfo.FromString( nativeFontInfoString );
	174
	175	InitFromNative();
	176	}
	177
	178	wxFontRefData::~wxFontRefData()
	179	{
	180	}
	181
	182	// ----------------------------------------------------------------------------
	183	// wxFontRefData SetXXX()
	184	// ----------------------------------------------------------------------------
	185
	186	void wxFontRefData::SetPointSize(int pointSize)
	187	{
	188	m_nativeFontInfo.SetPointSize(pointSize);
	189	}
	190
	191	/*
	192	NOTE: disabled because pango_font_description_set_absolute_size() and
	193	wxDC::GetCharHeight() do not mix well: setting with the former a pixel
	194	size of "30" makes the latter return 36...
	195	Besides, we need to return GetPointSize() a point size value even if
	196	SetPixelSize() was used and this would require further changes
	197	(and use of pango_font_description_get_size_is_absolute in some places).
	198
	199	bool wxFontRefData::SetPixelSize(const wxSize& pixelSize)
	200	{
	201	wxCHECK_MSG( pixelSize.GetWidth() >= 0 && pixelSize.GetHeight() > 0, false,
	202	"Negative values for the pixel size or zero pixel height are not allowed" );
	203
	204	if (wx_pango_version_check(1,8,0) != NULL \|\|
	205	pixelSize.GetWidth() != 0)
	206	{
	207	// NOTE: pango_font_description_set_absolute_size() only sets the font height;
	208	// if the user set the pixel width of the font explicitly or the pango
	209	// library is too old, we cannot proceed
	210	return false;
	211	}
	212
	213	pango_font_description_set_absolute_size( m_nativeFontInfo.description,
	214	pixelSize.GetHeight() * PANGO_SCALE );
	215
	216	return true;
	217	}
	218	*/
	219
	220	void wxFontRefData::SetFamily(wxFontFamily family)
	221	{
	222	m_nativeFontInfo.SetFamily(family);
	223	}
	224
	225	void wxFontRefData::SetStyle(wxFontStyle style)
	226	{
	227	m_nativeFontInfo.SetStyle(style);
	228	}
	229
	230	void wxFontRefData::SetWeight(wxFontWeight weight)
	231	{
	232	m_nativeFontInfo.SetWeight(weight);
	233	}
	234
	235	void wxFontRefData::SetUnderlined(bool underlined)
	236	{
	237	m_nativeFontInfo.SetUnderlined(underlined);
	238	}
	239
	240	void wxFontRefData::SetStrikethrough(bool strikethrough)
	241	{
	242	m_nativeFontInfo.SetStrikethrough(strikethrough);
	243	}
	244
	245	bool wxFontRefData::SetFaceName(const wxString& facename)
	246	{
	247	return m_nativeFontInfo.SetFaceName(facename);
	248	}
	249
	250	void wxFontRefData::SetEncoding(wxFontEncoding WXUNUSED(encoding))
	251	{
	252	// with GTK+ 2 Pango always uses UTF8 internally, we cannot change it
	253	}
	254
	255	void wxFontRefData::SetNativeFontInfo(const wxNativeFontInfo& info)
	256	{
	257	m_nativeFontInfo = info;
	258
	259	// set all the other font parameters from the native font info
	260	InitFromNative();
	261	}
	262
	263	// ----------------------------------------------------------------------------
	264	// wxFont creation
	265	// ----------------------------------------------------------------------------
	266
	267	wxFont::wxFont(const wxNativeFontInfo& info)
	268	{
	269	Create( info.GetPointSize(),
	270	info.GetFamily(),
	271	info.GetStyle(),
	272	info.GetWeight(),
	273	info.GetUnderlined(),
	274	info.GetFaceName(),
	275	info.GetEncoding() );
	276
	277	if ( info.GetStrikethrough() )
	278	SetStrikethrough(true);
	279	}
	280
	281	wxFont::wxFont(int pointSize,
	282	wxFontFamily family,
	283	int flags,
	284	const wxString& face,
	285	wxFontEncoding encoding)
	286	{
	287	m_refData = new wxFontRefData(pointSize, family,
	288	GetStyleFromFlags(flags),
	289	GetWeightFromFlags(flags),
	290	GetUnderlinedFromFlags(flags),
	291	GetStrikethroughFromFlags(flags),
	292	face, encoding);
	293	}
	294
	295	bool wxFont::Create( int pointSize,
	296	wxFontFamily family,
	297	wxFontStyle style,
	298	wxFontWeight weight,
	299	bool underlined,
	300	const wxString& face,
	301	wxFontEncoding encoding )
	302	{
	303	UnRef();
	304
	305	m_refData = new wxFontRefData(pointSize, family, style, weight,
	306	underlined, false, face, encoding);
	307
	308	return true;
	309	}
	310
	311	bool wxFont::Create(const wxString& fontname)
	312	{
	313	// VZ: does this really happen?
	314	if ( fontname.empty() )
	315	{
	316	*this = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
	317
	318	return true;
	319	}
	320
	321	m_refData = new wxFontRefData(fontname);
	322
	323	return true;
	324	}
	325
	326	wxFont::~wxFont()
	327	{
	328	}
	329
	330	// ----------------------------------------------------------------------------
	331	// accessors
	332	// ----------------------------------------------------------------------------
	333
	334	int wxFont::GetPointSize() const
	335	{
	336	wxCHECK_MSG( IsOk(), 0, wxT("invalid font") );
	337
	338	return M_FONTDATA->m_nativeFontInfo.GetPointSize();
	339	}
	340
	341	wxString wxFont::GetFaceName() const
	342	{
	343	wxCHECK_MSG( IsOk(), wxEmptyString, wxT("invalid font") );
	344
	345	return M_FONTDATA->m_nativeFontInfo.GetFaceName();
	346	}
	347
	348	wxFontFamily wxFont::DoGetFamily() const
	349	{
	350	return M_FONTDATA->m_nativeFontInfo.GetFamily();
	351	}
	352
	353	wxFontStyle wxFont::GetStyle() const
	354	{
	355	wxCHECK_MSG( IsOk(), wxFONTSTYLE_MAX, wxT("invalid font") );
	356
	357	return M_FONTDATA->m_nativeFontInfo.GetStyle();
	358	}
	359
	360	wxFontWeight wxFont::GetWeight() const
	361	{
	362	wxCHECK_MSG( IsOk(), wxFONTWEIGHT_MAX, wxT("invalid font") );
	363
	364	return M_FONTDATA->m_nativeFontInfo.GetWeight();
	365	}
	366
	367	bool wxFont::GetUnderlined() const
	368	{
	369	wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
	370
	371	return M_FONTDATA->m_nativeFontInfo.GetUnderlined();
	372	}
	373
	374	bool wxFont::GetStrikethrough() const
	375	{
	376	wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
	377
	378	return M_FONTDATA->m_nativeFontInfo.GetStrikethrough();
	379	}
	380
	381	wxFontEncoding wxFont::GetEncoding() const
	382	{
	383	wxCHECK_MSG( IsOk(), wxFONTENCODING_SYSTEM, wxT("invalid font") );
	384
	385	return wxFONTENCODING_UTF8;
	386	// Pango always uses UTF8... see also SetEncoding()
	387	}
	388
	389	const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
	390	{
	391	wxCHECK_MSG( IsOk(), NULL, wxT("invalid font") );
	392
	393	return &(M_FONTDATA->m_nativeFontInfo);
	394	}
	395
	396	bool wxFont::IsFixedWidth() const
	397	{
	398	wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
	399
	400	return wxFontBase::IsFixedWidth();
	401	}
	402
	403	// ----------------------------------------------------------------------------
	404	// change font attributes
	405	// ----------------------------------------------------------------------------
	406
	407	void wxFont::SetPointSize(int pointSize)
	408	{
	409	AllocExclusive();
	410
	411	M_FONTDATA->SetPointSize(pointSize);
	412	}
	413
	414	void wxFont::SetFamily(wxFontFamily family)
	415	{
	416	AllocExclusive();
	417
	418	M_FONTDATA->SetFamily(family);
	419	}
	420
	421	void wxFont::SetStyle(wxFontStyle style)
	422	{
	423	AllocExclusive();
	424
	425	M_FONTDATA->SetStyle(style);
	426	}
	427
	428	void wxFont::SetWeight(wxFontWeight weight)
	429	{
	430	AllocExclusive();
	431
	432	M_FONTDATA->SetWeight(weight);
	433	}
	434
	435	bool wxFont::SetFaceName(const wxString& faceName)
	436	{
	437	AllocExclusive();
	438
	439	return M_FONTDATA->SetFaceName(faceName) &&
	440	wxFontBase::SetFaceName(faceName);
	441	}
	442
	443	void wxFont::SetUnderlined(bool underlined)
	444	{
	445	AllocExclusive();
	446
	447	M_FONTDATA->SetUnderlined(underlined);
	448	}
	449
	450	void wxFont::SetStrikethrough(bool strikethrough)
	451	{
	452	AllocExclusive();
	453
	454	M_FONTDATA->SetStrikethrough(strikethrough);
	455	}
	456
	457	void wxFont::SetEncoding(wxFontEncoding encoding)
	458	{
	459	AllocExclusive();
	460
	461	M_FONTDATA->SetEncoding(encoding);
	462	}
	463
	464	void wxFont::DoSetNativeFontInfo( const wxNativeFontInfo& info )
	465	{
	466	AllocExclusive();
	467
	468	M_FONTDATA->SetNativeFontInfo( info );
	469	}
	470
	471	wxGDIRefData* wxFont::CreateGDIRefData() const
	472	{
	473	return new wxFontRefData;
	474	}
	475
	476	wxGDIRefData* wxFont::CloneGDIRefData(const wxGDIRefData* data) const
	477	{
	478	return new wxFontRefData(static_cast<const wxFontRefData>(data));
	479	}
	480
	481	bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
	482	{
	483	if (!IsOk() \|\| !(GetUnderlined() \|\| GetStrikethrough()))
	484	return false;
	485
	486	PangoAttrList* attrs = pango_attr_list_new();
	487	PangoAttribute* a;
	488
	489	if (wx_pango_version_check(1,16,0))
	490	{
	491	// a PangoLayout which has leading/trailing spaces with underlined font
	492	// is not correctly drawn by this pango version: Pango won't underline the spaces.
	493	// This can be a problem; e.g. wxHTML rendering of underlined text relies on
	494	// this behaviour. To workaround this problem, we use a special hack here
	495	// suggested by pango maintainer Behdad Esfahbod: we prepend and append two
	496	// empty space characters and give them a dummy colour attribute.
	497	// This will force Pango to underline the leading/trailing spaces, too.
	498
	499	const char* text = pango_layout_get_text(layout);
	500	const size_t n = strlen(text);
	501	if ((n > 0 && text[0] == ' ') \|\| (n > 1 && text[n - 1] == ' '))
	502	{
	503	wxCharBuffer buf(n + 6);
	504	// copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
	505	memcpy(buf.data(), "\342\200\214", 3);
	506	// copy the user string
	507	memcpy(buf.data() + 3, text, n);
	508	// copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
	509	memcpy(buf.data() + 3 + n, "\342\200\214", 3);
	510
	511	pango_layout_set_text(layout, buf, n + 6);
	512
	513	// Add dummy attributes (use colour as it's invisible anyhow for 0
	514	// width spaces) to ensure that the spaces in the beginning/end of the
	515	// string are underlined too.
	516	a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
	517	a->start_index = 0;
	518	a->end_index = 3;
	519	pango_attr_list_insert(attrs, a);
	520
	521	a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
	522	a->start_index = n + 3;
	523	a->end_index = n + 6;
	524	pango_attr_list_insert(attrs, a);
	525	}
	526	}
	527	if (GetUnderlined())
	528	{
	529	a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
	530	pango_attr_list_insert(attrs, a);
	531	}
	532	if (GetStrikethrough())
	533	{
	534	a = pango_attr_strikethrough_new(true);
	535	pango_attr_list_insert(attrs, a);
	536	}
	537
	538	pango_layout_set_attributes(layout, attrs);
	539	pango_attr_list_unref(attrs);
	540
	541	return true;
	542	}