Revert "Fix font matching of typographic families on Windows"

This reverts commit bcd2fa484a.

There was a report that this caused infinite recursion on some
systems, so we revert it for now and re-add it later when the
issue has been resolved.

Task-number: QTBUG-74983
Change-Id: I747e0437232d72d7a87eb602b10fa09c7130ce8f
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

src/gui/text/qfontdatabase.cpp

@@ -804,13 +804,6 @@ QString qt_resolveFontFamilyAlias(const QString &alias)
     return alias;
 }
 
-bool qt_isFontFamilyPopulated(const QString &familyName)
-{
-    QFontDatabasePrivate *d = privateDb();
-    QtFontFamily *f = d->family(familyName, QFontDatabasePrivate::RequestFamily);
-    return f != nullptr && f->populated;
-}
-
 /*!
     Returns a list of alternative fonts for the specified \a family and
     \a style and \a script using the \a styleHint given.

src/gui/text/qplatformfontdatabase.cpp

@@ -60,7 +60,6 @@ void qt_registerFont(const QString &familyname, const QString &stylename,
 
 void qt_registerFontFamily(const QString &familyName);
 void qt_registerAliasToFontFamily(const QString &familyName, const QString &alias);
-bool qt_isFontFamilyPopulated(const QString &familyName);
 
 /*!
     Registers the pre-rendered QPF2 font contained in the given \a dataArray.
@@ -666,16 +665,6 @@ void QPlatformFontDatabase::registerAliasToFontFamily(const QString &familyName,
     qt_registerAliasToFontFamily(familyName, alias);
 }
 
-/*!
-    Helper function that returns true if the font family has already been registered and populated.
-
-    \since 5.14
-*/
-bool QPlatformFontDatabase::isFamilyPopulated(const QString &familyName)
-{
-    return qt_isFontFamilyPopulated(familyName);
-}
-
 /*!
     \class QPlatformFontDatabase
     \since 5.0

src/gui/text/qplatformfontdatabase.h

@@ -139,8 +139,6 @@ public:
 
     static void registerFontFamily(const QString &familyName);
     static void registerAliasToFontFamily(const QString &familyName, const QString &alias);
-
-    static bool isFamilyPopulated(const QString &familyName);
 };
 
 QT_END_NAMESPACE

src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp

@@ -1012,8 +1012,7 @@ static bool addFontToDatabase(QString familyName,
                               const LOGFONT &logFont,
                               const TEXTMETRIC *textmetric,
                               const FONTSIGNATURE *signature,
-                              int type,
+                              int type)
-                              QWindowsFontDatabase *db)
 {
     // the "@family" fonts are just the same as "family". Ignore them.
     if (familyName.isEmpty() || familyName.at(0) == QLatin1Char('@') || familyName.startsWith(QLatin1String("WST_")))
@@ -1093,12 +1092,6 @@ static bool addFontToDatabase(QString familyName,
             writingSystems.setSupported(ws);
     }
 
-    // We came here from populating a different font family, so we have
-    // to ensure the entire typographic family is populated before we
-    // mark it as such inside registerFont()
-    if (!subFamilyName.isEmpty() && familyName != subFamilyName && !QPlatformFontDatabase::isFamilyPopulated(familyName))
-        db->populateFamily(familyName);
-
     QPlatformFontDatabase::registerFont(familyName, styleName, foundryName, weight,
                                         style, stretch, antialias, scalable, size, fixed, writingSystems, createFontFile(faceName));
 
@@ -1125,7 +1118,7 @@ static bool addFontToDatabase(QString familyName,
 }
 
 static int QT_WIN_CALLBACK storeFont(const LOGFONT *logFont, const TEXTMETRIC *textmetric,
-                                     DWORD type, LPARAM lParam)
+                                     DWORD type, LPARAM)
 {
     const ENUMLOGFONTEX *f = reinterpret_cast<const ENUMLOGFONTEX *>(logFont);
     const QString familyName = QString::fromWCharArray(f->elfLogFont.lfFaceName);
@@ -1137,7 +1130,7 @@ static int QT_WIN_CALLBACK storeFont(const LOGFONT *logFont, const TEXTMETRIC *t
     const FONTSIGNATURE *signature = nullptr;
     if (type & TRUETYPE_FONTTYPE)
         signature = &reinterpret_cast<const NEWTEXTMETRICEX *>(textmetric)->ntmFontSig;
-    addFontToDatabase(familyName, styleName, *logFont, textmetric, signature, type, reinterpret_cast<QWindowsFontDatabase *>(lParam));
+    addFontToDatabase(familyName, styleName, *logFont, textmetric, signature, type);
 
     // keep on enumerating
     return 1;
@@ -1156,7 +1149,7 @@ void QWindowsFontDatabase::populateFamily(const QString &familyName)
     familyName.toWCharArray(lf.lfFaceName);
     lf.lfFaceName[familyName.size()] = 0;
     lf.lfPitchAndFamily = 0;
-    EnumFontFamiliesEx(dummy, &lf, storeFont, reinterpret_cast<LPARAM>(this), 0);
+    EnumFontFamiliesEx(dummy, &lf, storeFont, 0, 0);
     ReleaseDC(0, dummy);
 }
 
@@ -1597,7 +1590,7 @@ QStringList QWindowsFontDatabase::addApplicationFont(const QByteArray &fontData,
             GetTextMetrics(hdc, &textMetrics);
 
             addFontToDatabase(familyName, styleName, lf, &textMetrics, &signatures.at(j),
-                              TRUETYPE_FONTTYPE, this);
+                              TRUETYPE_FONTTYPE);
 
             SelectObject(hdc, oldobj);
             DeleteObject(hfont);

src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h

@@ -96,8 +96,6 @@ public:
     QWindowsFontDatabase();
     ~QWindowsFontDatabase() override;
 
-    void ensureFamilyPopulated(const QString &familyName);
-
     void populateFontDatabase() override;
     void populateFamily(const QString &familyName) override;
     QFontEngine *fontEngine(const QFontDef &fontDef, void *handle) override;