/**************************************************************************** ** ** Implementation of TQFont, TQFontMetrics and TQFontInfo classes ** ** Created : 941207 ** ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the kernel module of the TQt GUI Toolkit. ** ** This file may be used under the terms of the GNU General ** Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the files LICENSE.GPL2 ** and LICENSE.GPL3 included in the packaging of this file. ** Alternatively you may (at your option) use any later version ** of the GNU General Public License if such license has been ** publicly approved by Trolltech ASA (or its successors, if any) ** and the KDE Free TQt Foundation. ** ** Please review the following information to ensure GNU General ** Public Licensing retquirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** This file may be used under the terms of the Q Public License as ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL ** included in the packaging of this file. Licensees holding valid TQt ** Commercial licenses may use this file in accordance with the TQt ** Commercial License Agreement provided with the Software. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted ** herein. ** **********************************************************************/ #define QT_FATAL_ASSERT #include "qfont.h" #include "qfontdatabase.h" #include "qfontmetrics.h" #include "qfontinfo.h" #include "qpainter.h" #include "qdict.h" #include "qcache.h" #include "qdatastream.h" #include "qapplication.h" #include "qcleanuphandler.h" #include "qstringlist.h" #ifdef Q_WS_MAC #include "qpaintdevicemetrics.h" #endif #include #include "qfontdata_p.h" #include "qfontengine_p.h" #include "qpainter_p.h" #include "qtextengine_p.h" // #define TQFONTCACHE_DEBUG #ifdef TQFONTCACHE_DEBUG # define FC_DEBUG qDebug #else # define FC_DEBUG if (FALSE) qDebug #endif bool TQFontDef::operator==( const TQFontDef &other ) const { /* TQFontDef comparison is more complicated than just simple per-member comparisons. When comparing point/pixel sizes, either point or pixelsize could be -1. in This case we have to compare the non negative size value. This test will fail if the point-sizes differ by 1/2 point or more or they do not round to the same value. We have to do this since our API still uses 'int' point-sizes in the API, but store deci-point-sizes internally. To compare the family members, we need to parse the font names and compare the family/foundry strings separately. This allows us to compare e.g. "Helvetica" and "Helvetica [Adobe]" with positive results. */ if (pixelSize != -1 && other.pixelSize != -1) { if (pixelSize != other.pixelSize) return FALSE; } else if (pointSize != -1 && other.pointSize != -1) { if (pointSize != other.pointSize && (TQABS(pointSize - other.pointSize) >= 5 || qRound(pointSize/10.) != qRound(other.pointSize/10.))) return FALSE; } else { return FALSE; } if (!ignorePitch && !other.ignorePitch && fixedPitch != other.fixedPitch) return FALSE; if (stretch != 0 && other.stretch != 0 && stretch != other.stretch) return FALSE; TQString this_family, this_foundry, other_family, other_foundry; TQFontDatabase::parseFontName(family, this_foundry, this_family); TQFontDatabase::parseFontName(other.family, other_foundry, other_family); return ( styleHint == other.styleHint && styleStrategy == other.styleStrategy && weight == other.weight && italic == other.italic && this_family == other_family && (this_foundry.isEmpty() || other_foundry.isEmpty() || this_foundry == other_foundry) #ifdef Q_WS_X11 && addStyle == other.addStyle #endif // Q_WS_X11 ); } TQFontPrivate::TQFontPrivate() : engineData( 0 ), paintdevice( 0 ), rawMode( FALSE ), underline( FALSE ), overline( FALSE ), strikeOut( FALSE ), mask( 0 ) { #ifdef Q_WS_X11 screen = TQPaintDevice::x11AppScreen(); #else screen = 0; #endif // Q_WS_X11 } TQFontPrivate::TQFontPrivate( const TQFontPrivate &other ) : TQShared(), request( other.request ), engineData( 0 ), paintdevice( other.paintdevice ), screen( other.screen ), rawMode( other.rawMode ), underline( other.underline ), overline( other.overline ), strikeOut( other.strikeOut ), mask( other.mask ) { } TQFontPrivate::~TQFontPrivate() { if ( engineData ) engineData->deref(); engineData = 0; } void TQFontPrivate::resolve( const TQFontPrivate *other ) { #ifdef QT_CHECK_STATE Q_ASSERT( other != 0 ); #endif if ( ( mask & Complete ) == Complete ) return; // assign the unset-bits with the set-bits of the other font def if ( ! ( mask & Family ) ) request.family = other->request.family; if ( ! ( mask & Size ) ) { request.pointSize = other->request.pointSize; request.pixelSize = other->request.pixelSize; } if ( ! ( mask & StyleHint ) ) request.styleHint = other->request.styleHint; if ( ! ( mask & StyleStrategy ) ) request.styleStrategy = other->request.styleStrategy; if ( ! ( mask & Weight ) ) request.weight = other->request.weight; if ( ! ( mask & Italic ) ) request.italic = other->request.italic; if ( ! ( mask & FixedPitch ) ) request.fixedPitch = other->request.fixedPitch; if ( ! ( mask & Stretch ) ) request.stretch = other->request.stretch; if ( ! ( mask & Underline ) ) underline = other->underline; if ( ! ( mask & Overline ) ) overline = other->overline; if ( ! ( mask & StrikeOut ) ) strikeOut = other->strikeOut; } TQFontEngineData::TQFontEngineData() : lineWidth( 1 ) { #if defined(Q_WS_X11) || defined(Q_WS_WIN) memset( engines, 0, TQFont::LastPrivateScript * sizeof( TQFontEngine * ) ); #else engine = 0; #endif // Q_WS_X11 || Q_WS_WIN #ifndef Q_WS_MAC memset( widthCache, 0, widthCacheSize*sizeof( uchar ) ); #endif } TQFontEngineData::~TQFontEngineData() { #if defined(Q_WS_X11) || defined(Q_WS_WIN) for ( int i = 0; i < TQFont::LastPrivateScript; i++ ) { if ( engines[i] ) engines[i]->deref(); engines[i] = 0; } #else if ( engine ) engine->deref(); engine = 0; #endif // Q_WS_X11 || Q_WS_WIN } /*! \class TQFont qfont.h \brief The TQFont class specifies a font used for drawing text. \ingroup graphics \ingroup appearance \ingroup shared \mainclass When you create a TQFont object you specify various attributes that you want the font to have. TQt will use the font with the specified attributes, or if no matching font exists, TQt will use the closest matching installed font. The attributes of the font that is actually used are retrievable from a TQFontInfo object. If the window system provides an exact match exactMatch() returns TRUE. Use TQFontMetrics to get measurements, e.g. the pixel length of a string using TQFontMetrics::width(). Use TQApplication::setFont() to set the application's default font. If a choosen X11 font does not include all the characters that need to be displayed, TQFont will try to find the characters in the nearest equivalent fonts. When a TQPainter draws a character from a font the TQFont will report whether or not it has the character; if it does not, TQPainter will draw an unfilled square. Create TQFonts like this: \code TQFont serifFont( "Times", 10, Bold ); TQFont sansFont( "Helvetica [Cronyx]", 12 ); \endcode The attributes set in the constructor can also be set later, e.g. setFamily(), setPointSize(), setPointSizeFloat(), setWeight() and setItalic(). The remaining attributes must be set after contstruction, e.g. setBold(), setUnderline(), setOverline(), setStrikeOut() and setFixedPitch(). TQFontInfo objects should be created \e after the font's attributes have been set. A TQFontInfo object will not change, even if you change the font's attributes. The corresponding "get" functions, e.g. family(), pointSize(), etc., return the values that were set, even though the values used may differ. The actual values are available from a TQFontInfo object. If the requested font family is unavailable you can influence the \link #fontmatching font matching algorithm\endlink by choosing a particular \l{TQFont::StyleHint} and \l{TQFont::StyleStrategy} with setStyleHint(). The default family (corresponding to the current style hint) is returned by defaultFamily(). The font-matching algorithm has a lastResortFamily() and lastResortFont() in cases where a suitable match cannot be found. You can provide substitutions for font family names using insertSubstitution() and insertSubstitutions(). Substitutions can be removed with removeSubstitution(). Use substitute() to retrieve a family's first substitute, or the family name itself if it has no substitutes. Use substitutes() to retrieve a list of a family's substitutes (which may be empty). Every TQFont has a key() which you can use, for example, as the key in a cache or dictionary. If you want to store a user's font preferences you could use TQSettings, writing the font information with toString() and reading it back with fromString(). The operator<<() and operator>>() functions are also available, but they work on a data stream. It is possible to set the height of characters shown on the screen to a specified number of pixels with setPixelSize(); however using setPointSize() has a similar effect and provides device independence. Under the X Window System you can set a font using its system specific name with setRawName(). Loading fonts can be expensive, especially on X11. TQFont contains extensive optimizations to make the copying of TQFont objects fast, and to cache the results of the slow window system functions it depends upon. \target fontmatching The font matching algorithm works as follows: \list 1 \i The specified font family is searched for. \i If not found, the styleHint() is used to select a replacement family. \i Each replacement font family is searched for. \i If none of these are found or there was no styleHint(), "helvetica" will be searched for. \i If "helvetica" isn't found TQt will try the lastResortFamily(). \i If the lastResortFamily() isn't found TQt will try the lastResortFont() which will always return a name of some kind. \endlist Once a font is found, the remaining attributes are matched in order of priority: \list 1 \i fixedPitch() \i pointSize() (see below) \i weight() \i italic() \endlist If you have a font which matches on family, even if none of the other attributes match, this font will be chosen in preference to a font which doesn't match on family but which does match on the other attributes. This is because font family is the dominant search criteria. The point size is defined to match if it is within 20% of the requested point size. When several fonts match and are only distinguished by point size, the font with the closest point size to the one requested will be chosen. The actual family, font size, weight and other font attributes used for drawing text will depend on what's available for the chosen family under the window system. A TQFontInfo object can be used to determine the actual values used for drawing the text. Examples: \code TQFont f("Helvetica"); \endcode If you had both an Adobe and a Cronyx Helvetica, you might get either. \code TQFont f1( "Helvetica [Cronyx]" ); // TQt 3.x TQFont f2( "Cronyx-Helvetica" ); // TQt 2.x compatibility \endcode You can specify the foundry you want in the family name. Both fonts, f1 and f2, in the above example will be set to "Helvetica [Cronyx]". To determine the attributes of the font actually used in the window system, use a TQFontInfo object, e.g. \code TQFontInfo info( f1 ); TQString family = info.family(); \endcode To find out font metrics use a TQFontMetrics object, e.g. \code TQFontMetrics fm( f1 ); int pixelWidth = fm.width( "How many pixels wide is this text?" ); int pixelHeight = fm.height(); \endcode For more general information on fonts, see the \link http://www.nwalsh.com/comp.fonts/FAQ/ comp.fonts FAQ.\endlink Information on encodings can be found from \link http://czyborra.com/ Roman Czyborra's\endlink page. \sa TQFontMetrics TQFontInfo TQFontDatabase TQApplication::setFont() TQWidget::setFont() TQPainter::setFont() TQFont::StyleHint TQFont::Weight */ /*! \enum TQFont::Script This enum represents \link unicode.html Unicode \endlink allocated scripts. For exhaustive coverage see \link http://www.amazon.com/exec/obidos/ASIN/0201616335/trolltech/t The Unicode Standard Version 3.0 \endlink. The following scripts are supported: Modern European alphabetic scripts (left to right): \value Latin consists of most alphabets based on the original Latin alphabet. \value Greek covers ancient and modern Greek and Coptic. \value Cyrillic covers the Slavic and non-Slavic languages using cyrillic alphabets. \value Armenian contains the Armenian alphabet used with the Armenian language. \value Georgian covers at least the language Georgian. \value Runic covers the known constituents of the Runic alphabets used by the early and medieval societies in the Germanic, Scandinavian, and Anglo-Saxon areas. \value Ogham is an alphabetical script used to write a very early form of Irish. \value SpacingModifiers are small signs indicating modifications to the preceeding letter. \value CombiningMarks consist of diacritical marks not specific to a particular alphabet, diacritical marks used in combination with mathematical and technical symbols, and glyph encodings applied to multiple letterforms. Middle Eastern scripts (right to left): \value Hebrew is used for writing Hebrew, Yiddish, and some other languages. \value Arabic covers the Arabic language as well as Persian, Urdu, Kurdish and some others. \value Syriac is used to write the active liturgical languages and dialects of several Middle Eastern and Southeast Indian communities. \value Thaana is used to write the Maledivian Dhivehi language. South and Southeast Asian scripts (left to right with few historical exceptions): \value Devanagari covers classical Sanskrit and modern Hindi as well as several other languages. \value Bengali is a relative to Devanagari employed to write the Bengali language used in West Bengal/India and Bangladesh as well as several minority languages. \value Gurmukhi is another Devanagari relative used to write Punjabi. \value Gujarati is closely related to Devanagari and used to write the Gujarati language of the Gujarat state in India. \value Oriya is used to write the Oriya language of Orissa state/India. \value Tamil is used to write the Tamil language of Tamil Nadu state/India, Sri Lanka, Singapore and parts of Malaysia as well as some minority languages. \value Telugu is used to write the Telugu language of Andhra Pradesh state/India and some minority languages. \value Kannada is another South Indian script used to write the Kannada language of Karnataka state/India and some minority languages. \value Malayalam is used to write the Malayalam language of Kerala state/India. \value Sinhala is used for Sri Lanka's majority language Sinhala and is also employed to write Pali, Sanskrit, and Tamil. \value Thai is used to write Thai and other Southeast Asian languages. \value Lao is a language and script tquite similar to Thai. \value Tibetan is the script used to write Tibetan in several countries like Tibet, the bordering Indian regions and Nepal. It is also used in the Buddist philosophy and liturgy of the Mongolian cultural area. \value Myanmar is mainly used to write the Burmese language of Myanmar (former Burma). \value Khmer is the official language of Kampuchea. East Asian scripts (traditionally top-down, right to left, modern often horizontal left to right): \value Han consists of the CJK (Chinese, Japanese, Korean) idiographic characters. \value Hiragana is a cursive syllabary used to indicate phonetics and pronounciation of Japanese words. \value Katakana is a non-cursive syllabic script used to write Japanese words with visual emphasis and non-Japanese words in a phonetical manner. \value Hangul is a Korean script consisting of alphabetic components. \value Bopomofo is a phonetic alphabet for Chinese (mainly Mandarin). \value Yi (also called Cuan or Wei) is a syllabary used to write the Yi language of Southwestern China, Myanmar, Laos, and Vietnam. Additional scripts that do not fit well into the script categories above: \value Ethiopic is a syllabary used by several Central East African languages. \value Cherokee is a left-to-right syllabic script used to write the Cherokee language. \value CanadianAboriginal consists of the syllabics used by some Canadian aboriginal societies. \value Mongolian is the traditional (and recently reintroduced) script used to write Mongolian. Symbols: \value CurrencySymbols contains currency symbols not encoded in other scripts. \value LetterlikeSymbols consists of symbols derived from ordinary letters of an alphabetical script. \value NumberForms are provided for compatibility with other existing character sets. \value MathematicalOperators consists of encodings for operators, relations and other symbols like arrows used in a mathematical context. \value TechnicalSymbols contains representations for control codes, the space symbol, APL symbols and other symbols mainly used in the context of electronic data processing. \value GeometricSymbols covers block elements and geometric shapes. \value MiscellaneousSymbols consists of a heterogeneous collection of symbols that do not fit any other Unicode character block, e.g. Dingbats. \value EnclosedAndSquare is provided for compatibility with some East Asian standards. \value Braille is an international writing system used by blind people. This script encodes the 256 eight-dot patterns with the 64 six-dot patterns as a subset. \value Tagalog \value Hanunoo \value Buhid \value Tagbanwa \value KatakanaHalfWidth \value Limbu (Unicode 4.0) \value TaiLe (Unicode 4.0) \value Unicode includes all the above scripts. */ /*! \internal Constructs a font for use on the paint device \a pd using the specified font \a data. */ TQFont::TQFont( TQFontPrivate *data, TQPaintDevice *pd ) { d = new TQFontPrivate( *data ); Q_CHECK_PTR( d ); d->paintdevice = pd; // now a single reference d->count = 1; } /*! \internal Detaches the font object from common font data. */ void TQFont::detach() { if (d->count == 1) { if ( d->engineData ) d->engineData->deref(); d->engineData = 0; return; } TQFontPrivate *old_d = d; d = new TQFontPrivate( *old_d ); /* if this font is a copy of the application default font, set the fontdef mask to zero to indicate that *nothing* has been explicitly set by the programmer. */ const TQFont appfont = TQApplication::font(); if ( old_d == appfont.d ) d->mask = 0; if ( old_d->deref() ) delete old_d; } /*! Constructs a font object that uses the application's default font. \sa TQApplication::setFont(), TQApplication::font() */ TQFont::TQFont() { const TQFont appfont = TQApplication::font(); d = appfont.d; d->ref(); } /*! Constructs a font object with the specified \a family, \a pointSize, \a weight and \a italic settings. If \a pointSize is <= 0 it is set to 1. The \a family name may optionally also include a foundry name, e.g. "Helvetica [Cronyx]". (The TQt 2.x syntax, i.e. "Cronyx-Helvetica", is also supported.) If the \a family is available from more than one foundry and the foundry isn't specified, an arbitrary foundry is chosen. If the family isn't available a family will be set using the \link #fontmatching font matching\endlink algorithm. \sa Weight, setFamily(), setPointSize(), setWeight(), setItalic(), setStyleHint() TQApplication::font() */ TQFont::TQFont( const TQString &family, int pointSize, int weight, bool italic ) { d = new TQFontPrivate; Q_CHECK_PTR( d ); d->mask = TQFontPrivate::Family; if (pointSize <= 0) { pointSize = 12; } else { d->mask |= TQFontPrivate::Size; } if (weight < 0) { weight = Normal; } else { d->mask |= TQFontPrivate::Weight | TQFontPrivate::Italic; } d->request.family = family; d->request.pointSize = pointSize * 10; d->request.pixelSize = -1; d->request.weight = weight; d->request.italic = italic; } /*! Constructs a font that is a copy of \a font. */ TQFont::TQFont( const TQFont &font ) { d = font.d; d->ref(); } /*! Destroys the font object and frees all allocated resources. */ TQFont::~TQFont() { if ( d->deref() ) delete d; d = 0; } /*! Assigns \a font to this font and returns a reference to it. */ TQFont &TQFont::operator=( const TQFont &font ) { if ( font.d != d ) { if ( d->deref() ) delete d; d = font.d; d->ref(); } return *this; } /*! Returns the requested font family name, i.e. the name set in the constructor or the last setFont() call. \sa setFamily() substitutes() substitute() */ TQString TQFont::family() const { return d->request.family; } /*! Sets the family name of the font. The name is case insensitive and may include a foundry name. The \a family name may optionally also include a foundry name, e.g. "Helvetica [Cronyx]". (The TQt 2.x syntax, i.e. "Cronyx-Helvetica", is also supported.) If the \a family is available from more than one foundry and the foundry isn't specified, an arbitrary foundry is chosen. If the family isn't available a family will be set using the \link #fontmatching font matching\endlink algorithm. \sa family(), setStyleHint(), TQFontInfo */ void TQFont::setFamily( const TQString &family ) { detach(); d->request.family = family; #if defined(Q_WS_X11) d->request.addStyle = TQString::null; #endif // Q_WS_X11 d->mask |= TQFontPrivate::Family; } /*! Returns the point size in 1/10ths of a point. The returned value will be -1 if the font size has been specified in pixels. \sa pointSize() pointSizeFloat() */ int TQFont::deciPointSize() const { return d->request.pointSize; } /*! Returns the point size of the font. Returns -1 if the font size was specified in pixels. \sa setPointSize() deciPointSize() pointSizeFloat() */ int TQFont::pointSize() const { return d->request.pointSize == -1 ? -1 : (d->request.pointSize + 5) / 10; } /*! Sets the point size to \a pointSize. The point size must be greater than zero. \sa pointSize() setPointSizeFloat() */ void TQFont::setPointSize( int pointSize ) { if ( pointSize <= 0 ) { #if defined(QT_CHECK_RANGE) qWarning( "TQFont::setPointSize: Point size <= 0 (%d)", pointSize ); #endif return; } detach(); d->request.pointSize = pointSize * 10; d->request.pixelSize = -1; d->mask |= TQFontPrivate::Size; } /*! Sets the point size to \a pointSize. The point size must be greater than zero. The requested precision may not be achieved on all platforms. \sa pointSizeFloat() setPointSize() setPixelSize() */ void TQFont::setPointSizeFloat( float pointSize ) { if ( pointSize <= 0.0 ) { #if defined(QT_CHECK_RANGE) qWarning( "TQFont::setPointSize: Point size <= 0 (%f)", pointSize ); #endif return; } detach(); d->request.pointSize = qRound(pointSize * 10.0); d->request.pixelSize = -1; d->mask |= TQFontPrivate::Size; } /*! Returns the point size of the font. Returns -1 if the font size was specified in pixels. \sa pointSize() setPointSizeFloat() pixelSize() TQFontInfo::pointSize() TQFontInfo::pixelSize() */ float TQFont::pointSizeFloat() const { return float( d->request.pointSize == -1 ? -10 : d->request.pointSize ) / 10.0; } /*! Sets the font size to \a pixelSize pixels. Using this function makes the font device dependent. Use setPointSize() or setPointSizeFloat() to set the size of the font in a device independent manner. \sa pixelSize() */ void TQFont::setPixelSize( int pixelSize ) { if ( pixelSize <= 0 ) { #if defined(QT_CHECK_RANGE) qWarning( "TQFont::setPixelSize: Pixel size <= 0 (%d)", pixelSize ); #endif return; } detach(); d->request.pixelSize = pixelSize; d->request.pointSize = -1; d->mask |= TQFontPrivate::Size; } /*! Returns the pixel size of the font if it was set with setPixelSize(). Returns -1 if the size was set with setPointSize() or setPointSizeFloat(). \sa setPixelSize() pointSize() TQFontInfo::pointSize() TQFontInfo::pixelSize() */ int TQFont::pixelSize() const { return d->request.pixelSize; } /*! \obsolete Sets the logical pixel height of font characters when shown on the screen to \a pixelSize. */ void TQFont::setPixelSizeFloat( float pixelSize ) { setPixelSize( (int)pixelSize ); } /*! Returns TRUE if italic has been set; otherwise returns FALSE. \sa setItalic() */ bool TQFont::italic() const { return d->request.italic; } /*! If \a enable is TRUE, italic is set on; otherwise italic is set off. \sa italic(), TQFontInfo */ void TQFont::setItalic( bool enable ) { detach(); d->request.italic = enable; d->mask |= TQFontPrivate::Italic; } /*! Returns the weight of the font which is one of the enumerated values from \l{TQFont::Weight}. \sa setWeight(), Weight, TQFontInfo */ int TQFont::weight() const { return d->request.weight; } /*! \enum TQFont::Weight TQt uses a weighting scale from 0 to 99 similar to, but not the same as, the scales used in Windows or CSS. A weight of 0 is ultralight, whilst 99 will be an extremely black. This enum contains the predefined font weights: \value Light 25 \value Normal 50 \value DemiBold 63 \value Bold 75 \value Black 87 */ /*! Sets the weight the font to \a weight, which should be a value from the \l TQFont::Weight enumeration. \sa weight(), TQFontInfo */ void TQFont::setWeight( int weight ) { if ( weight < 0 || weight > 99 ) { #if defined(QT_CHECK_RANGE) qWarning( "TQFont::setWeight: Value out of range (%d)", weight ); #endif return; } detach(); d->request.weight = weight; d->mask |= TQFontPrivate::Weight; } /*! \fn bool TQFont::bold() const Returns TRUE if weight() is a value greater than \link Weight TQFont::Normal \endlink; otherwise returns FALSE. \sa weight(), setBold(), TQFontInfo::bold() */ /*! \fn void TQFont::setBold( bool enable ) If \a enable is true sets the font's weight to \link Weight TQFont::Bold \endlink; otherwise sets the weight to \link Weight TQFont::Normal\endlink. For finer boldness control use setWeight(). \sa bold(), setWeight() */ /*! Returns TRUE if underline has been set; otherwise returns FALSE. \sa setUnderline() */ bool TQFont::underline() const { return d->underline; } /*! If \a enable is TRUE, sets underline on; otherwise sets underline off. \sa underline(), TQFontInfo */ void TQFont::setUnderline( bool enable ) { detach(); d->underline = enable; d->mask |= TQFontPrivate::Underline; } /*! Returns TRUE if overline has been set; otherwise returns FALSE. \sa setOverline() */ bool TQFont::overline() const { return d->overline; } /*! If \a enable is TRUE, sets overline on; otherwise sets overline off. \sa overline(), TQFontInfo */ void TQFont::setOverline( bool enable ) { detach(); d->overline = enable; d->mask |= TQFontPrivate::Overline; } /*! Returns TRUE if strikeout has been set; otherwise returns FALSE. \sa setStrikeOut() */ bool TQFont::strikeOut() const { return d->strikeOut; } /*! If \a enable is TRUE, sets strikeout on; otherwise sets strikeout off. \sa strikeOut(), TQFontInfo */ void TQFont::setStrikeOut( bool enable ) { detach(); d->strikeOut = enable; d->mask |= TQFontPrivate::StrikeOut; } /*! Returns TRUE if fixed pitch has been set; otherwise returns FALSE. \sa setFixedPitch(), TQFontInfo::fixedPitch() */ bool TQFont::fixedPitch() const { return d->request.fixedPitch; } /*! If \a enable is TRUE, sets fixed pitch on; otherwise sets fixed pitch off. \sa fixedPitch(), TQFontInfo */ void TQFont::setFixedPitch( bool enable ) { detach(); d->request.fixedPitch = enable; d->request.ignorePitch = FALSE; d->mask |= TQFontPrivate::FixedPitch; } /*! Returns the StyleStrategy. The style strategy affects the \link #fontmatching font matching\endlink algorithm. See \l TQFont::StyleStrategy for the list of strategies. \sa setStyleHint() TQFont::StyleHint */ TQFont::StyleStrategy TQFont::styleStrategy() const { return (StyleStrategy) d->request.styleStrategy; } /*! Returns the StyleHint. The style hint affects the \link #fontmatching font matching\endlink algorithm. See \l TQFont::StyleHint for the list of strategies. \sa setStyleHint(), TQFont::StyleStrategy TQFontInfo::styleHint() */ TQFont::StyleHint TQFont::styleHint() const { return (StyleHint) d->request.styleHint; } /*! \enum TQFont::StyleHint Style hints are used by the \link #fontmatching font matching\endlink algorithm to find an appropriate default family if a selected font family is not available. \value AnyStyle leaves the font matching algorithm to choose the family. This is the default. \value SansSerif the font matcher prefer sans serif fonts. \value Helvetica is a synonym for \c SansSerif. \value Serif the font matcher prefers serif fonts. \value Times is a synonym for \c Serif. \value TypeWriter the font matcher prefers fixed pitch fonts. \value Courier a synonym for \c TypeWriter. \value OldEnglish the font matcher prefers decorative fonts. \value Decorative is a synonym for \c OldEnglish. \value System the font matcher prefers system fonts. */ /*! \enum TQFont::StyleStrategy The style strategy tells the \link #fontmatching font matching\endlink algorithm what type of fonts should be used to find an appropriate default family. The following strategies are available: \value PreferDefault the default style strategy. It does not prefer any type of font. \value PreferBitmap prefers bitmap fonts (as opposed to outline fonts). \value PreferDevice prefers device fonts. \value PreferOutline prefers outline fonts (as opposed to bitmap fonts). \value ForceOutline forces the use of outline fonts. \value NoAntialias don't antialias the fonts. \value PreferAntialias antialias if possible. \value OpenGLCompatible forces the use of OpenGL compatible fonts. Any of these may be OR-ed with one of these flags: \value PreferMatch prefer an exact match. The font matcher will try to use the exact font size that has been specified. \value PreferQuality prefer the best quality font. The font matcher will use the nearest standard point size that the font supports. */ /*! Sets the style hint and strategy to \a hint and \a strategy, respectively. If these aren't set explicitly the style hint will default to \c AnyStyle and the style strategy to \c PreferDefault. TQt does not support style hints on X11 since this information is not provided by the window system. \sa StyleHint, styleHint(), StyleStrategy, styleStrategy(), TQFontInfo */ void TQFont::setStyleHint( StyleHint hint, StyleStrategy strategy ) { detach(); if ( ( d->mask & ( TQFontPrivate::StyleHint | TQFontPrivate::StyleStrategy ) ) && (StyleHint) d->request.styleHint == hint && (StyleStrategy) d->request.styleStrategy == strategy ) return; d->request.styleHint = hint; d->request.styleStrategy = strategy; d->mask |= TQFontPrivate::StyleHint; d->mask |= TQFontPrivate::StyleStrategy; #if defined(Q_WS_X11) d->request.addStyle = TQString::null; #endif // Q_WS_X11 } /*! Sets the style strategy for the font to \a s. \sa TQFont::StyleStrategy */ void TQFont::setStyleStrategy( StyleStrategy s ) { detach(); if ( ( d->mask & TQFontPrivate::StyleStrategy ) && s == (StyleStrategy)d->request.styleStrategy ) return; d->request.styleStrategy = s; d->mask |= TQFontPrivate::StyleStrategy; } /*! \enum TQFont::Stretch Predefined stretch values that follow the CSS naming convention. \value UltraCondensed 50 \value ExtraCondensed 62 \value Condensed 75 \value SemiCondensed 87 \value Unstretched 100 \value SemiExpanded 112 \value Expanded 125 \value ExtraExpanded 150 \value UltraExpanded 200 \sa setStretch() stretch() */ /*! Returns the stretch factor for the font. \sa setStretch() */ int TQFont::stretch() const { return d->request.stretch; } /*! Sets the stretch factor for the font. The stretch factor changes the width of all characters in the font by \a factor percent. For example, setting \a factor to 150 results in all characters in the font being 1.5 times ( ie. 150% ) wider. The default stretch factor is 100. The minimum stretch factor is 1, and the maximum stretch factor is 4000. The stretch factor is only applied to outline fonts. The stretch factor is ignored for bitmap fonts. NOTE: TQFont cannot stretch XLFD fonts. When loading XLFD fonts on X11, the stretch factor is matched against a predefined set of values for the SETWIDTH_NAME field of the XLFD. \sa stretch() TQFont::StyleStrategy */ void TQFont::setStretch( int factor ) { if ( factor < 1 || factor > 4000 ) { #ifdef QT_CHECK_RANGE qWarning( "TQFont::setStretch(): parameter '%d' out of range", factor ); #endif // QT_CHECK_RANGE return; } detach(); if ( ( d->mask & TQFontPrivate::Stretch ) && d->request.stretch == (uint)factor ) return; d->request.stretch = (uint)factor; d->mask |= TQFontPrivate::Stretch; } /*! If \a enable is TRUE, turns raw mode on; otherwise turns raw mode off. This function only has an effect under X11. If raw mode is enabled, TQt will search for an X font with a complete font name matching the family name, ignoring all other values set for the TQFont. If the font name matches several fonts, TQt will use the first font returned by X. TQFontInfo \e cannot be used to fetch information about a TQFont using raw mode (it will return the values set in the TQFont for all parameters, including the family name). \warning Do not use raw mode unless you really, really need it! In most (if not all) cases, setRawName() is a much better choice. \sa rawMode(), setRawName() */ void TQFont::setRawMode( bool enable ) { detach(); if ( (bool) d->rawMode == enable ) return; d->rawMode = enable; } /*! Returns TRUE if a window system font exactly matching the settings of this font is available. \sa TQFontInfo */ bool TQFont::exactMatch() const { TQFontEngine *engine = d->engineForScript( TQFont::NoScript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return d->rawMode ? engine->type() != TQFontEngine::Box : d->request == engine->fontDef; } /*! Returns TRUE if this font is equal to \a f; otherwise returns FALSE. Two TQFonts are considered equal if their font attributes are equal. If rawMode() is enabled for both fonts, only the family fields are compared. \sa operator!=() isCopyOf() */ bool TQFont::operator==( const TQFont &f ) const { return f.d == d || ( f.d->request == d->request && f.d->underline == d->underline && f.d->overline == d->overline && f.d->strikeOut == d->strikeOut ); } /*! Returns TRUE if this font is different from \a f; otherwise returns FALSE. Two TQFonts are considered to be different if their font attributes are different. If rawMode() is enabled for both fonts, only the family fields are compared. \sa operator==() */ bool TQFont::operator!=( const TQFont &f ) const { return !(operator==( f )); } /*! Returns TRUE if this font and \a f are copies of each other, i.e. one of them was created as a copy of the other and neither has been modified since. This is much stricter than equality. \sa operator=() operator==() */ bool TQFont::isCopyOf( const TQFont & f ) const { return d == f.d; } /*! Returns TRUE if raw mode is used for font name matching; otherwise returns FALSE. \sa setRawMode() rawName() */ bool TQFont::rawMode() const { return d->rawMode; } /*! Returns a new TQFont that has attributes copied from \a other. */ TQFont TQFont::resolve( const TQFont &other ) const { if ( *this == other && d->mask == other.d->mask ) return *this; TQFont font( *this ); font.detach(); /* if this font is a copy of the application default font, set the fontdef mask to zero to indicate that *nothing* has been explicitly set by the programmer. */ const TQFont appfont = TQApplication::font(); if ( d == appfont.d ) font.d->mask = 0; font.d->resolve( other.d ); return font; } #ifndef QT_NO_COMPAT /*! \obsolete Please use TQApplication::font() instead. */ TQFont TQFont::defaultFont() { return TQApplication::font(); } /*! \obsolete Please use TQApplication::setFont() instead. */ void TQFont::setDefaultFont( const TQFont &f ) { TQApplication::setFont( f ); } #endif #ifndef QT_NO_STRINGLIST /***************************************************************************** TQFont substitution management *****************************************************************************/ typedef TQDict TQFontSubst; static TQFontSubst *fontSubst = 0; static TQSingleCleanupHandler qfont_cleanup_fontsubst; // create substitution dict static void initFontSubst() { // default substitutions static const char *initTbl[] = { #if defined(Q_WS_X11) "arial", "helvetica", "helv", "helvetica", "tms rmn", "times", #elif defined(Q_WS_WIN) "times", "Times New Roman", "courier", "Courier New", "helvetica", "Arial", #endif 0, 0 }; if (fontSubst) return; fontSubst = new TQFontSubst(17, FALSE); Q_CHECK_PTR( fontSubst ); fontSubst->setAutoDelete( TRUE ); qfont_cleanup_fontsubst.set(&fontSubst); for ( int i=0; initTbl[i] != 0; i += 2 ) TQFont::insertSubstitution(TQString::fromLatin1(initTbl[i]), TQString::fromLatin1(initTbl[i+1])); } /*! Returns the first family name to be used whenever \a familyName is specified. The lookup is case insensitive. If there is no substitution for \a familyName, \a familyName is returned. To obtain a list of substitutions use substitutes(). \sa setFamily() insertSubstitutions() insertSubstitution() removeSubstitution() */ TQString TQFont::substitute( const TQString &familyName ) { initFontSubst(); TQStringList *list = fontSubst->find(familyName); if (list && list->count() > 0) return *(list->at(0)); return familyName; } /*! Returns a list of family names to be used whenever \a familyName is specified. The lookup is case insensitive. If there is no substitution for \a familyName, an empty list is returned. \sa substitute() insertSubstitutions() insertSubstitution() removeSubstitution() */ TQStringList TQFont::substitutes(const TQString &familyName) { initFontSubst(); TQStringList ret, *list = fontSubst->find(familyName); if (list) ret += *list; return ret; } /*! Inserts the family name \a substituteName into the substitution table for \a familyName. \sa insertSubstitutions() removeSubstitution() substitutions() substitute() substitutes() */ void TQFont::insertSubstitution(const TQString &familyName, const TQString &substituteName) { initFontSubst(); TQStringList *list = fontSubst->find(familyName); if (! list) { list = new TQStringList; fontSubst->insert(familyName, list); } if (! list->contains(substituteName)) list->append(substituteName); } /*! Inserts the list of families \a substituteNames into the substitution list for \a familyName. \sa insertSubstitution(), removeSubstitution(), substitutions(), substitute() */ void TQFont::insertSubstitutions(const TQString &familyName, const TQStringList &substituteNames) { initFontSubst(); TQStringList *list = fontSubst->find(familyName); if (! list) { list = new TQStringList; fontSubst->insert(familyName, list); } TQStringList::ConstIterator it = substituteNames.begin(); while (it != substituteNames.end()) { if (! list->contains(*it)) list->append(*it); it++; } } // ### mark: should be called removeSubstitutions() /*! Removes all the substitutions for \a familyName. \sa insertSubstitutions(), insertSubstitution(), substitutions(), substitute() */ void TQFont::removeSubstitution( const TQString &familyName ) { // ### function name should be removeSubstitutions() or // ### removeSubstitutionList() initFontSubst(); fontSubst->remove(familyName); } /*! Returns a sorted list of substituted family names. \sa insertSubstitution(), removeSubstitution(), substitute() */ TQStringList TQFont::substitutions() { initFontSubst(); TQStringList ret; TQDictIterator it(*fontSubst); while (it.current()) { ret.append(it.currentKey()); ++it; } ret.sort(); return ret; } #endif // QT_NO_STRINGLIST /* \internal Internal function. Converts boolean font settings to an unsigned 8-bit number. Used for serialization etc. */ static Q_UINT8 get_font_bits( const TQFontPrivate *f ) { #ifdef QT_CHECK_STATE Q_ASSERT( f != 0 ); #endif Q_UINT8 bits = 0; if ( f->request.italic ) bits |= 0x01; if ( f->underline ) bits |= 0x02; if ( f->overline ) bits |= 0x40; if ( f->strikeOut ) bits |= 0x04; if ( f->request.fixedPitch ) bits |= 0x08; // if ( f.hintSetByUser ) // bits |= 0x10; if ( f->rawMode ) bits |= 0x20; return bits; } #ifndef QT_NO_DATASTREAM /* \internal Internal function. Sets boolean font settings from an unsigned 8-bit number. Used for serialization etc. */ static void set_font_bits( Q_UINT8 bits, TQFontPrivate *f ) { #ifdef QT_CHECK_STATE Q_ASSERT( f != 0 ); #endif f->request.italic = (bits & 0x01) != 0; f->underline = (bits & 0x02) != 0; f->overline = (bits & 0x40) != 0; f->strikeOut = (bits & 0x04) != 0; f->request.fixedPitch = (bits & 0x08) != 0; // f->hintSetByUser = (bits & 0x10) != 0; f->rawMode = (bits & 0x20) != 0; } #endif /*! Returns the font's key, a textual representation of a font. It is typically used as the key for a cache or dictionary of fonts. \sa TQMap */ TQString TQFont::key() const { return toString(); } /*! Returns a description of the font. The description is a comma-separated list of the attributes, perfectly suited for use in TQSettings. \sa fromString() operator<<() */ TQString TQFont::toString() const { const TQChar comma( ',' ); return family() + comma + TQString::number( pointSizeFloat() ) + comma + TQString::number( pixelSize() ) + comma + TQString::number( (int) styleHint() ) + comma + TQString::number( weight() ) + comma + TQString::number( (int) italic() ) + comma + TQString::number( (int) underline() ) + comma + TQString::number( (int) strikeOut() ) + comma + TQString::number( (int)fixedPitch() ) + comma + TQString::number( (int) rawMode() ); } /*! Sets this font to match the description \a descrip. The description is a comma-separated list of the font attributes, as returned by toString(). \sa toString() operator>>() */ bool TQFont::fromString(const TQString &descrip) { #ifndef QT_NO_STRINGLIST TQStringList l(TQStringList::split(',', descrip)); int count = (int)l.count(); #else int count = 0; TQString l[11]; int from = 0; int to = descrip.find( ',' ); while ( to > 0 && count < 11 ) { l[count] = descrip.mid( from, to-from ); count++; from = to+1; to = descrip.find( ',', from ); } #endif // QT_NO_STRINGLIST if ( !count || ( count > 2 && count < 9 ) || count > 11 ) { #ifdef QT_CHECK_STATE qWarning("TQFont::fromString: invalid description '%s'", descrip.isEmpty() ? "(empty)" : descrip.latin1()); #endif return FALSE; } setFamily(l[0]); if ( count > 1 && l[1].toDouble() > 0.0 ) setPointSizeFloat(l[1].toDouble()); if ( count == 9 ) { setStyleHint((StyleHint) l[2].toInt()); setWeight(l[3].toInt()); setItalic(l[4].toInt()); setUnderline(l[5].toInt()); setStrikeOut(l[6].toInt()); setFixedPitch(l[7].toInt()); setRawMode(l[8].toInt()); } else if ( count == 10 ) { if ( l[2].toInt() > 0 ) setPixelSize( l[2].toInt() ); setStyleHint((StyleHint) l[3].toInt()); setWeight(l[4].toInt()); setItalic(l[5].toInt()); setUnderline(l[6].toInt()); setStrikeOut(l[7].toInt()); setFixedPitch(l[8].toInt()); setRawMode(l[9].toInt()); } return TRUE; } #if !defined( Q_WS_QWS ) /*! \internal Internal function that dumps font cache statistics. */ void TQFont::cacheStatistics() { } #endif // !Q_WS_QWS /***************************************************************************** TQFont stream functions *****************************************************************************/ #ifndef QT_NO_DATASTREAM /*! \relates TQFont Writes the font \a font to the data stream \a s. (toString() writes to a text stream.) \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator<<( TQDataStream &s, const TQFont &font ) { if ( s.version() == 1 ) { TQCString fam( font.d->request.family.latin1() ); s << fam; } else { s << font.d->request.family; } if ( s.version() <= 3 ) { Q_INT16 pointSize = (Q_INT16) font.d->request.pointSize; if ( pointSize == -1 ) { #ifdef Q_WS_X11 pointSize = (Q_INT16)(font.d->request.pixelSize*720/TQPaintDevice::x11AppDpiY()); #else pointSize = (Q_INT16)TQFontInfo( font ).pointSize() * 10; #endif } s << pointSize; } else { s << (Q_INT16) font.d->request.pointSize; s << (Q_INT16) font.d->request.pixelSize; } s << (Q_UINT8) font.d->request.styleHint; if ( s.version() >= 5 ) s << (Q_UINT8 ) font.d->request.styleStrategy; return s << (Q_UINT8) 0 << (Q_UINT8) font.d->request.weight << get_font_bits(font.d); } /*! \relates TQFont Reads the font \a font from the data stream \a s. (fromString() reads from a text stream.) \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator>>( TQDataStream &s, TQFont &font ) { if (font.d->deref()) delete font.d; font.d = new TQFontPrivate; font.d->mask = TQFontPrivate::Complete; Q_INT16 pointSize, pixelSize = -1; Q_UINT8 styleHint, styleStrategy = TQFont::PreferDefault, charSet, weight, bits; if ( s.version() == 1 ) { TQCString fam; s >> fam; font.d->request.family = TQString( fam ); } else { s >> font.d->request.family; } s >> pointSize; if ( s.version() >= 4 ) s >> pixelSize; s >> styleHint; if ( s.version() >= 5 ) s >> styleStrategy; s >> charSet; s >> weight; s >> bits; font.d->request.pointSize = pointSize; font.d->request.pixelSize = pixelSize; font.d->request.styleHint = styleHint; font.d->request.styleStrategy = styleStrategy; font.d->request.weight = weight; set_font_bits( bits, font.d ); return s; } #endif // QT_NO_DATASTREAM /***************************************************************************** TQFontMetrics member functions *****************************************************************************/ /*! \class TQFontMetrics qfontmetrics.h \brief The TQFontMetrics class provides font metrics information. \ingroup graphics \ingroup shared TQFontMetrics functions calculate the size of characters and strings for a given font. There are three ways you can create a TQFontMetrics object: \list 1 \i Calling the TQFontMetrics constructor with a TQFont creates a font metrics object for a screen-compatible font, i.e. the font cannot be a printer font*. If the font is changed later, the font metrics object is \e not updated. \i TQWidget::fontMetrics() returns the font metrics for a widget's font. This is equivalent to TQFontMetrics(widget->font()). If the widget's font is changed later, the font metrics object is \e not updated. \i TQPainter::fontMetrics() returns the font metrics for a painter's current font. If the painter's font is changed later, the font metrics object is \e not updated. \endlist * If you use a printer font the values returned may be inaccurate. Printer fonts are not always accessible so the nearest screen font is used if a printer font is supplied. Once created, the object provides functions to access the individual metrics of the font, its characters, and for strings rendered in the font. There are several functions that operate on the font: ascent(), descent(), height(), leading() and lineSpacing() return the basic size properties of the font. The underlinePos(), overlinePos(), strikeOutPos() and lineWidth() functions, return the properties of the line that underlines, overlines or strikes out the characters. These functions are all fast. There are also some functions that operate on the set of glyphs in the font: minLeftBearing(), minRightBearing() and maxWidth(). These are by necessity slow, and we recommend avoiding them if possible. For each character, you can get its width(), leftBearing() and rightBearing() and find out whether it is in the font using inFont(). You can also treat the character as a string, and use the string functions on it. The string functions include width(), to return the width of a string in pixels (or points, for a printer), boundingRect(), to return a rectangle large enough to contain the rendered string, and size(), to return the size of that rectangle. Example: \code TQFont font( "times", 24 ); TQFontMetrics fm( font ); int pixelsWide = fm.width( "What's the width of this text?" ); int pixelsHigh = fm.height(); \endcode \sa TQFont TQFontInfo TQFontDatabase */ /*! Constructs a font metrics object for \a font. The font must be screen-compatible, i.e. a font you use when drawing text in \link TQWidget widgets\endlink or \link TQPixmap pixmaps\endlink, not TQPicture or TQPrinter. The font metrics object holds the information for the font that is passed in the constructor at the time it is created, and is not updated if the font's attributes are changed later. Use TQPainter::fontMetrics() to get the font metrics when painting. This will give correct results also when painting on paint device that is not screen-compatible. */ TQFontMetrics::TQFontMetrics( const TQFont &font ) : d( font.d ), painter( 0 ), fscript( TQFont::NoScript ) { d->ref(); } /*! \overload Constructs a font metrics object for \a font using the given \a script. */ TQFontMetrics::TQFontMetrics( const TQFont &font, TQFont::Script script ) : d( font.d ), painter( 0 ), fscript( script ) { d->ref(); } /*! \internal Constructs a font metrics object for the painter's font \a p. */ TQFontMetrics::TQFontMetrics( const TQPainter *p ) : painter ( (TQPainter *) p ), fscript( TQFont::NoScript ) { #if defined(CHECK_STATE) if ( !painter->isActive() ) qWarning( "TQFontMetrics: Get font metrics between TQPainter::begin() " "and TQPainter::end()" ); #endif if ( painter->testf(TQPainter::DirtyFont) ) painter->updateFont(); d = painter->pfont ? painter->pfont->d : painter->cfont.d; #if defined(Q_WS_X11) if ( d->screen != p->scrn ) { TQFontPrivate *new_d = new TQFontPrivate( *d ); Q_CHECK_PTR( new_d ); d = new_d; d->screen = p->scrn; d->count = 1; } else #endif // Q_WS_X11 d->ref(); } /*! Constructs a copy of \a fm. */ TQFontMetrics::TQFontMetrics( const TQFontMetrics &fm ) : d( fm.d ), painter( 0 ), fscript( fm.fscript ) { d->ref(); } /*! Destroys the font metrics object and frees all allocated resources. */ TQFontMetrics::~TQFontMetrics() { if ( d->deref() ) delete d; } /*! Assigns the font metrics \a fm. */ TQFontMetrics &TQFontMetrics::operator=( const TQFontMetrics &fm ) { if ( d != fm.d ) { if ( d->deref() ) delete d; d = fm.d; d->ref(); } painter = fm.painter; return *this; } /*! Returns the ascent of the font. The ascent of a font is the distance from the baseline to the highest position characters extend to. In practice, some font designers break this rule, e.g. when they put more than one accent on top of a character, or to accommodate an unusual character in an exotic language, so it is possible (though rare) that this value will be too small. \sa descent() */ int TQFontMetrics::ascent() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return TQMAX(engine->ascent(), latin_engine->ascent()); } /*! Returns the descent of the font. The descent is the distance from the base line to the lowest point characters extend to. (Note that this is different from X, which adds 1 pixel.) In practice, some font designers break this rule, e.g. to accommodate an unusual character in an exotic language, so it is possible (though rare) that this value will be too small. \sa ascent() */ int TQFontMetrics::descent() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return TQMAX(engine->descent(), latin_engine->descent()); } /*! Returns the height of the font. This is always equal to ascent()+descent()+1 (the 1 is for the base line). \sa leading(), lineSpacing() */ int TQFontMetrics::height() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return (TQMAX(engine->ascent(), latin_engine->ascent()) + TQMAX(engine->descent(), latin_engine->descent()) + 1); } /*! Returns the leading of the font. This is the natural inter-line spacing. \sa height(), lineSpacing() */ int TQFontMetrics::leading() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return TQMAX(engine->leading(), latin_engine->leading()); } /*! Returns the distance from one base line to the next. This value is always equal to leading()+height(). \sa height(), leading() */ int TQFontMetrics::lineSpacing() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return (TQMAX(engine->leading(), latin_engine->leading()) + TQMAX(engine->ascent(), latin_engine->ascent()) + TQMAX(engine->descent(), latin_engine->descent()) + 1); } /*! Returns the minimum left bearing of the font. This is the smallest leftBearing(char) of all characters in the font. Note that this function can be very slow if the font is large. \sa minRightBearing(), leftBearing() */ int TQFontMetrics::minLeftBearing() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return TQMIN(engine->minLeftBearing(), latin_engine->minLeftBearing()); } /*! Returns the minimum right bearing of the font. This is the smallest rightBearing(char) of all characters in the font. Note that this function can be very slow if the font is large. \sa minLeftBearing(), rightBearing() */ int TQFontMetrics::minRightBearing() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *latin_engine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( latin_engine != 0 ); #endif // QT_CHECK_STATE return TQMIN(engine->minRightBearing(), latin_engine->minRightBearing()); } /*! Returns the width of the widest character in the font. */ int TQFontMetrics::maxWidth() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); TQFontEngine *lengine = d->engineForScript( TQFont::Latin ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); Q_ASSERT( lengine != 0 ); #endif // QT_CHECK_STATE return TQMAX(engine->maxCharWidth(), lengine->maxCharWidth()); } /*! Returns TRUE if character \a ch is a valid character in the font; otherwise returns FALSE. */ bool TQFontMetrics::inFont(TQChar ch) const { TQFont::Script script; SCRIPT_FOR_CHAR( script, ch ); TQFontEngine *engine = d->engineForScript( script ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE if ( engine->type() == TQFontEngine::Box ) return FALSE; return engine->canRender( &ch, 1 ); } /*! \fn int TQFontMetrics::leftBearing( TQChar ch ) const Returns the left bearing of character \a ch in the font. The left bearing is the right-ward distance of the left-most pixel of the character from the logical origin of the character. This value is negative if the pixels of the character extend to the left of the logical origin. See width(TQChar) for a graphical description of this metric. \sa rightBearing(), minLeftBearing(), width() */ #if !defined(Q_WS_WIN) && !defined(Q_WS_QWS) int TQFontMetrics::leftBearing(TQChar ch) const { TQFont::Script script; SCRIPT_FOR_CHAR( script, ch ); TQFontEngine *engine = d->engineForScript( script ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE if ( engine->type() == TQFontEngine::Box ) return 0; glyph_t glyphs[10]; int nglyphs = 9; engine->stringToCMap( &ch, 1, glyphs, 0, &nglyphs, FALSE ); // ### can nglyphs != 1 happen at all? Not currently I think glyph_metrics_t gi = engine->boundingBox( glyphs[0] ); return gi.x; } #endif // !Q_WS_WIN /*! \fn int TQFontMetrics::rightBearing(TQChar ch) const Returns the right bearing of character \a ch in the font. The right bearing is the left-ward distance of the right-most pixel of the character from the logical origin of a subsequent character. This value is negative if the pixels of the character extend to the right of the width() of the character. See width() for a graphical description of this metric. \sa leftBearing(), minRightBearing(), width() */ #if !defined(Q_WS_WIN) && !defined(Q_WS_QWS) int TQFontMetrics::rightBearing(TQChar ch) const { TQFont::Script script; SCRIPT_FOR_CHAR( script, ch ); TQFontEngine *engine = d->engineForScript( script ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE if ( engine->type() == TQFontEngine::Box ) return 0; glyph_t glyphs[10]; int nglyphs = 9; engine->stringToCMap( &ch, 1, glyphs, 0, &nglyphs, FALSE ); // ### can nglyphs != 1 happen at all? Not currently I think glyph_metrics_t gi = engine->boundingBox( glyphs[0] ); return gi.xoff - gi.x - gi.width; } #endif // !Q_WS_WIN #ifndef Q_WS_QWS /*! Returns the width in pixels of the first \a len characters of \a str. If \a len is negative (the default), the entire string is used. Note that this value is \e not equal to boundingRect().width(); boundingRect() returns a rectangle describing the pixels this string will cover whereas width() returns the distance to where the next string should be drawn. \sa boundingRect() */ int TQFontMetrics::width( const TQString &str, int len ) const { if (len < 0) len = str.length(); if (len == 0) return 0; int pos = 0; int width = 0; #ifndef Q_WS_MAC const TQChar *ch = str.unicode(); while (pos < len) { unsigned short uc = ch->unicode(); if (uc < TQFontEngineData::widthCacheSize && d->engineData && d->engineData->widthCache[uc]) width += d->engineData->widthCache[uc]; else { TQFont::Script script; SCRIPT_FOR_CHAR( script, *ch ); if (script >= TQFont::Arabic && script <= TQFont::Khmer) break; if ( ::category( *ch ) != TQChar::Mark_NonSpacing && !qIsZeroWidthChar(ch->unicode())) { TQFontEngine *engine = d->engineForScript( script ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE glyph_t glyphs[8]; advance_t advances[8]; int nglyphs = 7; engine->stringToCMap( ch, 1, glyphs, advances, &nglyphs, FALSE ); // ### can nglyphs != 1 happen at all? Not currently I think if ( uc < TQFontEngineData::widthCacheSize && advances[0] > 0 && advances[0] < 0x100 ) d->engineData->widthCache[ uc ] = advances[0]; width += advances[0]; } } ++pos; ++ch; } if ( pos < len ) { #endif TQTextEngine layout( str, d ); layout.itemize( TQTextEngine::WidthOnly ); width += layout.width( pos, len-pos ); #ifndef Q_WS_MAC } #endif return width; } #endif /*! \fn int TQFontMetrics::width( TQChar ch ) const Returns the logical width of character \a ch in pixels. This is a distance appropriate for drawing a subsequent character after \a ch. Some of the metrics are described in the image to the right. The central dark rectangles cover the logical width() of each character. The outer pale rectangles cover the leftBearing() and rightBearing() of each character. Notice that the bearings of "f" in this particular font are both negative, while the bearings of "o" are both positive. \warning This function will produce incorrect results for Arabic characters or non spacing marks in the middle of a string, as the glyph shaping and positioning of marks that happens when processing strings cannot be taken into account. Use charWidth() instead if you aren't looking for the width of isolated characters. \sa boundingRect(), charWidth() */ /*! \fn int TQFontMetrics::width( char c ) const \overload \obsolete Provided to aid porting from TQt 1.x. */ /*! \fn int TQFontMetrics::charWidth( const TQString &str, int pos ) const Returns the width of the character at position \a pos in the string \a str. The whole string is needed, as the glyph drawn may change depending on the context (the letter before and after the current one) for some languages (e.g. Arabic). This function also takes non spacing marks and ligatures into account. */ #ifndef Q_WS_QWS /*! Returns the bounding rectangle of the first \a len characters of \a str, which is the set of pixels the text would cover if drawn at (0, 0). If \a len is negative (the default), the entire string is used. Note that the bounding rectangle may extend to the left of (0, 0), e.g. for italicized fonts, and that the text output may cover \e all pixels in the bounding rectangle. Newline characters are processed as normal characters, \e not as linebreaks. Due to the different actual character heights, the height of the bounding rectangle of e.g. "Yes" and "yes" may be different. \sa width(), TQPainter::boundingRect() */ TQRect TQFontMetrics::boundingRect( const TQString &str, int len ) const { if (len < 0) len = str.length(); if (len == 0) return TQRect(); TQTextEngine layout( str, d ); layout.itemize( TQTextEngine::NoBidi|TQTextEngine::SingleLine ); glyph_metrics_t gm = layout.boundingBox( 0, len ); return TQRect( gm.x, gm.y, gm.width, gm.height ); } #endif /*! Returns the rectangle that is covered by ink if the character specified by \a ch were to be drawn at the origin of the coordinate system. Note that the bounding rectangle may extend to the left of (0, 0), e.g. for italicized fonts, and that the text output may cover \e all pixels in the bounding rectangle. For a space character the rectangle will usually be empty. Note that the rectangle usually extends both above and below the base line. \warning The width of the returned rectangle is not the advance width of the character. Use boundingRect(const TQString &) or width() instead. \sa width() */ TQRect TQFontMetrics::boundingRect( TQChar ch ) const { TQFont::Script script; SCRIPT_FOR_CHAR( script, ch ); TQFontEngine *engine = d->engineForScript( script ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE glyph_t glyphs[10]; int nglyphs = 9; engine->stringToCMap( &ch, 1, glyphs, 0, &nglyphs, FALSE ); glyph_metrics_t gi = engine->boundingBox( glyphs[0] ); return TQRect( gi.x, gi.y, gi.width, gi.height ); } /*! \overload Returns the bounding rectangle of the first \a len characters of \a str, which is the set of pixels the text would cover if drawn at (0, 0). The drawing, and hence the bounding rectangle, is constrained to the rectangle (\a x, \a y, \a w, \a h). If \a len is negative (which is the default), the entire string is used. The \a flgs argument is the bitwise OR of the following flags: \list \i \c AlignAuto aligns to the left border for all languages except Arabic and Hebrew where it aligns to the right. \i \c AlignLeft aligns to the left border. \i \c AlignRight aligns to the right border. \i \c AlignJustify produces justified text. \i \c AlignHCenter aligns horizontally centered. \i \c AlignTop aligns to the top border. \i \c AlignBottom aligns to the bottom border. \i \c AlignVCenter aligns vertically centered \i \c AlignCenter (== \c{AlignHCenter | AlignVCenter}) \i \c SingleLine ignores newline characters in the text. \i \c ExpandTabs expands tabs (see below) \i \c ShowPrefix interprets "&x" as "x", i.e. underlined. \i \c WordBreak breaks the text to fit the rectangle. \endlist Horizontal alignment defaults to \c AlignAuto and vertical alignment defaults to \c AlignTop. If several of the horizontal or several of the vertical alignment flags are set, the resulting alignment is undefined. These flags are defined in \c qnamespace.h. If \c ExpandTabs is set in \a flgs, then: if \a tabarray is non-null, it specifies a 0-terminated sequence of pixel-positions for tabs; otherwise if \a tabstops is non-zero, it is used as the tab spacing (in pixels). Note that the bounding rectangle may extend to the left of (0, 0), e.g. for italicized fonts, and that the text output may cover \e all pixels in the bounding rectangle. Newline characters are processed as linebreaks. Despite the different actual character heights, the heights of the bounding rectangles of "Yes" and "yes" are the same. The bounding rectangle given by this function is somewhat larger than that calculated by the simpler boundingRect() function. This function uses the \link minLeftBearing() maximum left \endlink and \link minRightBearing() right \endlink font bearings as is necessary for multi-line text to align correctly. Also, fontHeight() and lineSpacing() are used to calculate the height, rather than individual character heights. The \a intern argument should not be used. \sa width(), TQPainter::boundingRect(), TQt::AlignmentFlags */ TQRect TQFontMetrics::boundingRect( int x, int y, int w, int h, int flgs, const TQString& str, int len, int tabstops, int *tabarray, TQTextParag **intern ) const { if ( len < 0 ) len = str.length(); int tabarraylen=0; if (tabarray) while (tabarray[tabarraylen]) tabarraylen++; TQRect rb; TQRect r(x, y, w, h); qt_format_text( TQFont( d, d->paintdevice ), r, flgs|TQt::DontPrint, str, len, &rb, tabstops, tabarray, tabarraylen, intern, 0 ); return rb; } /*! Returns the size in pixels of the first \a len characters of \a str. If \a len is negative (the default), the entire string is used. The \a flgs argument is the bitwise OR of the following flags: \list \i \c SingleLine ignores newline characters. \i \c ExpandTabs expands tabs (see below) \i \c ShowPrefix interprets "&x" as "x", i.e. underlined. \i \c WordBreak breaks the text to fit the rectangle. \endlist These flags are defined in \c qnamespace.h. If \c ExpandTabs is set in \a flgs, then: if \a tabarray is non-null, it specifies a 0-terminated sequence of pixel-positions for tabs; otherwise if \a tabstops is non-zero, it is used as the tab spacing (in pixels). Newline characters are processed as linebreaks. Despite the different actual character heights, the heights of the bounding rectangles of "Yes" and "yes" are the same. The \a intern argument should not be used. \sa boundingRect() */ TQSize TQFontMetrics::size( int flgs, const TQString &str, int len, int tabstops, int *tabarray, TQTextParag **intern ) const { return boundingRect(0,0,0,0,flgs,str,len,tabstops,tabarray,intern).size(); } /*! Returns the distance from the base line to where an underscore should be drawn. \sa overlinePos(), strikeOutPos(), lineWidth() */ int TQFontMetrics::underlinePos() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->underlinePosition(); } /*! Returns the distance from the base line to where an overline should be drawn. \sa underlinePos(), strikeOutPos(), lineWidth() */ int TQFontMetrics::overlinePos() const { int pos = ascent() + 1; return pos > 0 ? pos : 1; } /*! Returns the distance from the base line to where the strikeout line should be drawn. \sa underlinePos(), overlinePos(), lineWidth() */ int TQFontMetrics::strikeOutPos() const { int pos = ascent() / 3; return pos > 0 ? pos : 1; } /*! Returns the width of the underline and strikeout lines, adjusted for the point size of the font. \sa underlinePos(), overlinePos(), strikeOutPos() */ int TQFontMetrics::lineWidth() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->lineThickness(); } /***************************************************************************** TQFontInfo member functions *****************************************************************************/ /*! \class TQFontInfo qfontinfo.h \brief The TQFontInfo class provides general information about fonts. \ingroup graphics \ingroup shared The TQFontInfo class provides the same access functions as TQFont, e.g. family(), pointSize(), italic(), weight(), fixedPitch(), styleHint() etc. But whilst the TQFont access functions return the values that were set, a TQFontInfo object returns the values that apply to the font that will actually be used to draw the text. For example, when the program asks for a 25pt Courier font on a machine that has a non-scalable 24pt Courier font, TQFont will (normally) use the 24pt Courier for rendering. In this case, TQFont::pointSize() returns 25 and TQFontInfo::pointSize() returns 24. There are three ways to create a TQFontInfo object. \list 1 \i Calling the TQFontInfo constructor with a TQFont creates a font info object for a screen-compatible font, i.e. the font cannot be a printer font*. If the font is changed later, the font info object is \e not updated. \i TQWidget::fontInfo() returns the font info for a widget's font. This is equivalent to calling TQFontInfo(widget->font()). If the widget's font is changed later, the font info object is \e not updated. \i TQPainter::fontInfo() returns the font info for a painter's current font. If the painter's font is changed later, the font info object is \e not updated. \endlist * If you use a printer font the values returned may be inaccurate. Printer fonts are not always accessible so the nearest screen font is used if a printer font is supplied. \sa TQFont TQFontMetrics TQFontDatabase */ /*! Constructs a font info object for \a font. The font must be screen-compatible, i.e. a font you use when drawing text in \link TQWidget widgets\endlink or \link TQPixmap pixmaps\endlink, not TQPicture or TQPrinter. The font info object holds the information for the font that is passed in the constructor at the time it is created, and is not updated if the font's attributes are changed later. Use TQPainter::fontInfo() to get the font info when painting. This will give correct results also when painting on paint device that is not screen-compatible. */ TQFontInfo::TQFontInfo( const TQFont &font ) : d( font.d ), painter( 0 ), fscript( TQFont::NoScript ) { d->ref(); } /*! Constructs a font info object for \a font using the specified \a script. */ TQFontInfo::TQFontInfo( const TQFont &font, TQFont::Script script ) : d( font.d ), painter( 0 ), fscript( script ) { d->ref(); } /*! \internal Constructs a font info object from the painter's font \a p. */ TQFontInfo::TQFontInfo( const TQPainter *p ) : painter( 0 ), fscript( TQFont::NoScript ) { TQPainter *painter = (TQPainter *) p; #if defined(CHECK_STATE) if ( !painter->isActive() ) qWarning( "TQFontInfo: Get font info between TQPainter::begin() " "and TQPainter::end()" ); #endif painter->setf( TQPainter::FontInf ); if ( painter->testf(TQPainter::DirtyFont) ) painter->updateFont(); if ( painter->pfont ) d = painter->pfont->d; else d = painter->cfont.d; d->ref(); } /*! Constructs a copy of \a fi. */ TQFontInfo::TQFontInfo( const TQFontInfo &fi ) : d(fi.d), painter(0), fscript( fi.fscript ) { d->ref(); } /*! Destroys the font info object. */ TQFontInfo::~TQFontInfo() { if ( d->deref() ) delete d; } /*! Assigns the font info in \a fi. */ TQFontInfo &TQFontInfo::operator=( const TQFontInfo &fi ) { if ( d != fi.d ) { if ( d->deref() ) delete d; d = fi.d; d->ref(); } painter = 0; fscript = fi.fscript; return *this; } /*! Returns the family name of the matched window system font. \sa TQFont::family() */ TQString TQFontInfo::family() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->fontDef.family; } /*! Returns the point size of the matched window system font. \sa TQFont::pointSize() */ int TQFontInfo::pointSize() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return ( engine->fontDef.pointSize + 5 ) / 10; } /*! Returns the pixel size of the matched window system font. \sa TQFont::pointSize() */ int TQFontInfo::pixelSize() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->fontDef.pixelSize; } /*! Returns the italic value of the matched window system font. \sa TQFont::italic() */ bool TQFontInfo::italic() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->fontDef.italic; } /*! Returns the weight of the matched window system font. \sa TQFont::weight(), bold() */ int TQFontInfo::weight() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return engine->fontDef.weight; } /*! \fn bool TQFontInfo::bold() const Returns TRUE if weight() would return a value greater than \c TQFont::Normal; otherwise returns FALSE. \sa weight(), TQFont::bold() */ /*! Returns the underline value of the matched window system font. \sa TQFont::underline() \internal Here we read the underline flag directly from the TQFont. This is OK for X11 and for Windows because we always get what we want. */ bool TQFontInfo::underline() const { return d->underline; } /*! Returns the overline value of the matched window system font. \sa TQFont::overline() \internal Here we read the overline flag directly from the TQFont. This is OK for X11 and for Windows because we always get what we want. */ bool TQFontInfo::overline() const { return d->overline; } /*! Returns the strikeout value of the matched window system font. \sa TQFont::strikeOut() \internal Here we read the strikeOut flag directly from the TQFont. This is OK for X11 and for Windows because we always get what we want. */ bool TQFontInfo::strikeOut() const { return d->strikeOut; } /*! Returns the fixed pitch value of the matched window system font. \sa TQFont::fixedPitch() */ bool TQFontInfo::fixedPitch() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE #ifdef Q_OS_MAC if (!engine->fontDef.fixedPitchComputed) { TQChar ch[2] = { TQChar('i'), TQChar('m') }; glyph_t g[2]; int l = 2; advance_t a[2]; engine->stringToCMap(ch, 2, g, a, &l, FALSE); engine->fontDef.fixedPitch = a[0] == a[1]; engine->fontDef.fixedPitchComputed = TRUE; } #endif return engine->fontDef.fixedPitch; } /*! Returns the style of the matched window system font. Currently only returns the style hint set in TQFont. \sa TQFont::styleHint() TQFont::StyleHint */ TQFont::StyleHint TQFontInfo::styleHint() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return (TQFont::StyleHint) engine->fontDef.styleHint; } /*! Returns TRUE if the font is a raw mode font; otherwise returns FALSE. If it is a raw mode font, all other functions in TQFontInfo will return the same values set in the TQFont, regardless of the font actually used. \sa TQFont::rawMode() */ bool TQFontInfo::rawMode() const { return d->rawMode; } /*! Returns TRUE if the matched window system font is exactly the same as the one specified by the font; otherwise returns FALSE. \sa TQFont::exactMatch() */ bool TQFontInfo::exactMatch() const { TQFontEngine *engine = d->engineForScript( (TQFont::Script) fscript ); #ifdef QT_CHECK_STATE Q_ASSERT( engine != 0 ); #endif // QT_CHECK_STATE return d->rawMode ? engine->type() != TQFontEngine::Box : d->request == engine->fontDef; } // ********************************************************************** // TQFontCache // ********************************************************************** #ifdef TQFONTCACHE_DEBUG // fast timeouts for debugging static const int fast_timeout = 1000; // 1s static const int slow_timeout = 5000; // 5s #else static const int fast_timeout = 10000; // 10s static const int slow_timeout = 300000; // 5m #endif // TQFONTCACHE_DEBUG TQFontCache *TQFontCache::instance = 0; const uint TQFontCache::min_cost = 4*1024; // 4mb static TQSingleCleanupHandler cleanup_fontcache; TQFontCache::TQFontCache() : TQObject( qApp, "global font cache" ), total_cost( 0 ), max_cost( min_cost ), current_timestamp( 0 ), fast( FALSE ), timer_id( -1 ) { Q_ASSERT( instance == 0 ); instance = this; cleanup_fontcache.set( &instance ); } TQFontCache::~TQFontCache() { { EngineDataCache::Iterator it = engineDataCache.begin(), end = engineDataCache.end(); while ( it != end ) { if ( it.data()->count == 0 ) delete it.data(); else FC_DEBUG("TQFontCache::~TQFontCache: engineData %p still has refcount %d", it.data(), it.data()->count); ++it; } } EngineCache::Iterator it = engineCache.begin(), end = engineCache.end(); while ( it != end ) { if ( it.data().data->count == 0 ) { if ( --it.data().data->cache_count == 0 ) { FC_DEBUG("TQFontCache::~TQFontCache: deleting engine %p key=(%d / %d %d %d %d %d)", it.data().data, it.key().script, it.key().def.pointSize, it.key().def.pixelSize, it.key().def.weight, it.key().def.italic, it.key().def.fixedPitch); delete it.data().data; } } else { FC_DEBUG("TQFontCache::~TQFontCache: engine = %p still has refcount %d", it.data().data, it.data().data->count); } ++it; } instance = 0; } #ifdef Q_WS_QWS void TQFontCache::clear() { { EngineDataCache::Iterator it = engineDataCache.begin(), end = engineDataCache.end(); while ( it != end ) { TQFontEngineData *data = it.data(); if ( data->engine ) data->engine->deref(); data->engine = 0; ++it; } } EngineCache::Iterator it = engineCache.begin(), end = engineCache.end(); while ( it != end ) { if ( it.data().data->count == 0 ) { if ( --it.data().data->cache_count == 0 ) { FC_DEBUG("TQFontCache::~TQFontCache: deleting engine %p key=(%d / %d %d %d %d %d)", it.data().data, it.key().script, it.key().def.pointSize, it.key().def.pixelSize, it.key().def.weight, it.key().def.italic, it.key().def.fixedPitch); delete it.data().data; } } else { FC_DEBUG("TQFontCache::~TQFontCache: engine = %p still has refcount %d", it.data().data, it.data().data->count); } ++it; } } #endif TQFontEngineData *TQFontCache::findEngineData( const Key &key ) const { EngineDataCache::ConstIterator it = engineDataCache.find( key ), end = engineDataCache.end(); if ( it == end ) return 0; // found return it.data(); } void TQFontCache::insertEngineData( const Key &key, TQFontEngineData *engineData ) { FC_DEBUG( "TQFontCache: inserting new engine data %p", engineData ); engineDataCache.insert( key, engineData ); increaseCost( sizeof( TQFontEngineData ) ); } TQFontEngine *TQFontCache::findEngine( const Key &key ) { EngineCache::Iterator it = engineCache.find( key ), end = engineCache.end(); if ( it == end ) return 0; // found... update the hitcount and timestamp it.data().hits++; it.data().timestamp = ++current_timestamp; FC_DEBUG( "TQFontCache: found font engine\n" " %p: timestamp %4u hits %3u ref %2d/%2d, type '%s'", it.data().data, it.data().timestamp, it.data().hits, it.data().data->count, it.data().data->cache_count, it.data().data->name() ); return it.data().data; } void TQFontCache::insertEngine( const Key &key, TQFontEngine *engine ) { FC_DEBUG( "TQFontCache: inserting new engine %p", engine ); Engine data( engine ); data.timestamp = ++current_timestamp; engineCache.insert( key, data ); // only increase the cost if this is the first time we insert the engine if ( engine->cache_count == 0 ) increaseCost( engine->cache_cost ); ++engine->cache_count; } void TQFontCache::increaseCost( uint cost ) { cost = ( cost + 512 ) / 1024; // store cost in kb cost = cost > 0 ? cost : 1; total_cost += cost; FC_DEBUG( " COST: increased %u kb, total_cost %u kb, max_cost %u kb", cost, total_cost, max_cost ); if ( total_cost > max_cost) { max_cost = total_cost; if ( timer_id == -1 || ! fast ) { FC_DEBUG( " TIMER: starting fast timer (%d ms)", fast_timeout ); if (timer_id != -1) killTimer( timer_id ); timer_id = startTimer( fast_timeout ); fast = TRUE; } } } void TQFontCache::decreaseCost( uint cost ) { cost = ( cost + 512 ) / 1024; // cost is stored in kb cost = cost > 0 ? cost : 1; Q_ASSERT( cost <= total_cost ); total_cost -= cost; FC_DEBUG( " COST: decreased %u kb, total_cost %u kb, max_cost %u kb", cost, total_cost, max_cost ); } #if defined(Q_WS_WIN ) || defined (Q_WS_QWS) void TQFontCache::cleanupPrinterFonts() { FC_DEBUG( "TQFontCache::cleanupPrinterFonts" ); { FC_DEBUG( " CLEAN engine data:" ); // clean out all unused engine datas EngineDataCache::Iterator it = engineDataCache.begin(), end = engineDataCache.end(); while ( it != end ) { if ( it.key().screen == 0 ) { ++it; continue; } if( it.data()->count > 0 ) { #ifdef Q_WS_WIN for(int i = 0; i < TQFont::LastPrivateScript; ++i) { if( it.data()->engines[i] ) { it.data()->engines[i]->deref(); it.data()->engines[i] = 0; } } #else if ( it.data()->engine ) { it.data()->engine->deref(); it.data()->engine = 0; } #endif ++it; } else { EngineDataCache::Iterator rem = it++; decreaseCost( sizeof( TQFontEngineData ) ); FC_DEBUG( " %p", rem.data() ); delete rem.data(); engineDataCache.remove( rem ); } } } EngineCache::Iterator it = engineCache.begin(), end = engineCache.end(); while( it != end ) { if ( it.data().data->count > 0 || it.key().screen == 0) { ++it; continue; } FC_DEBUG( " %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'", it.data().data, it.data().timestamp, it.data().hits, it.data().data->count, it.data().data->cache_count, it.data().data->name() ); if ( --it.data().data->cache_count == 0 ) { FC_DEBUG( " DELETE: last occurence in cache" ); decreaseCost( it.data().data->cache_cost ); delete it.data().data; } engineCache.remove( it++ ); } } #endif void TQFontCache::timerEvent( TQTimerEvent * ) { FC_DEBUG( "TQFontCache::timerEvent: performing cache maintenance (timestamp %u)", current_timestamp ); if ( total_cost <= max_cost && max_cost <= min_cost ) { FC_DEBUG( " cache redused sufficiently, stopping timer" ); killTimer( timer_id ); timer_id = -1; fast = FALSE; return; } // go through the cache and count up everything in use uint in_use_cost = 0; { FC_DEBUG( " SWEEP engine data:" ); // make sure the cost of each engine data is at least 1kb const uint engine_data_cost = sizeof( TQFontEngineData ) > 1024 ? sizeof( TQFontEngineData ) : 1024; EngineDataCache::ConstIterator it = engineDataCache.begin(), end = engineDataCache.end(); for ( ; it != end; ++it ) { #ifdef TQFONTCACHE_DEBUG FC_DEBUG( " %p: ref %2d", it.data(), it.data()->count ); # if defined(Q_WS_X11) || defined(Q_WS_WIN) // print out all engines for ( int i = 0; i < TQFont::LastPrivateScript; ++i ) { if ( ! it.data()->engines[i] ) continue; FC_DEBUG( " contains %p", it.data()->engines[i] ); } # endif // Q_WS_X11 || Q_WS_WIN #endif // TQFONTCACHE_DEBUG if ( it.data()->count > 0 ) in_use_cost += engine_data_cost; } } { FC_DEBUG( " SWEEP engine:" ); EngineCache::ConstIterator it = engineCache.begin(), end = engineCache.end(); for ( ; it != end; ++it ) { FC_DEBUG( " %p: timestamp %4u hits %2u ref %2d/%2d, cost %u bytes", it.data().data, it.data().timestamp, it.data().hits, it.data().data->count, it.data().data->cache_count, it.data().data->cache_cost ); if ( it.data().data->count > 0 ) in_use_cost += it.data().data->cache_cost / it.data().data->cache_count; } // attempt to make up for rounding errors in_use_cost += (uint)engineCache.count(); } in_use_cost = ( in_use_cost + 512 ) / 1024; // cost is stored in kb /* calculate the new maximum cost for the cache NOTE: in_use_cost is *not* correct due to rounding errors in the above algorithm. instead of worrying about getting the calculation correct, we are more interested in speed, and use in_use_cost as a floor for new_max_cost */ uint new_max_cost = TQMAX( TQMAX( max_cost / 2, in_use_cost ), min_cost ); FC_DEBUG( " after sweep, in use %u kb, total %u kb, max %u kb, new max %u kb", in_use_cost, total_cost, max_cost, new_max_cost ); if ( new_max_cost == max_cost ) { if ( fast ) { FC_DEBUG( " cannot shrink cache, slowing timer" ); killTimer( timer_id ); timer_id = startTimer( slow_timeout ); fast = FALSE; } return; } else if ( ! fast ) { FC_DEBUG( " dropping into passing gear" ); killTimer( timer_id ); timer_id = startTimer( fast_timeout ); fast = TRUE; } max_cost = new_max_cost; { FC_DEBUG( " CLEAN engine data:" ); // clean out all unused engine datas EngineDataCache::Iterator it = engineDataCache.begin(), end = engineDataCache.end(); while ( it != end ) { if ( it.data()->count > 0 ) { ++it; continue; } EngineDataCache::Iterator rem = it++; decreaseCost( sizeof( TQFontEngineData ) ); FC_DEBUG( " %p", rem.data() ); delete rem.data(); engineDataCache.remove( rem ); } } // clean out the engine cache just enough to get below our new max cost uint current_cost; do { current_cost = total_cost; EngineCache::Iterator it = engineCache.begin(), end = engineCache.end(); // determine the oldest and least popular of the unused engines uint oldest = ~0; uint least_popular = ~0; for ( ; it != end; ++it ) { if ( it.data().data->count > 0 ) continue; if ( it.data().timestamp < oldest && it.data().hits <= least_popular ) { oldest = it.data().timestamp; least_popular = it.data().hits; } } FC_DEBUG( " oldest %u least popular %u", oldest, least_popular ); for ( it = engineCache.begin(); it != end; ++it ) { if ( it.data().data->count == 0 && it.data().timestamp == oldest && it.data().hits == least_popular) break; } if ( it != end ) { FC_DEBUG( " %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'", it.data().data, it.data().timestamp, it.data().hits, it.data().data->count, it.data().data->cache_count, it.data().data->name() ); if ( --it.data().data->cache_count == 0 ) { FC_DEBUG( " DELETE: last occurence in cache" ); decreaseCost( it.data().data->cache_cost ); delete it.data().data; } else { /* this particular font engine is in the cache multiple times... set current_cost to zero, so that we can keep looping to get rid of all occurences */ current_cost = 0; } engineCache.remove( it ); } } while ( current_cost != total_cost && total_cost > max_cost ); }