diff options
| -rw-r--r-- | src/gui/text/qfontdatabase.cpp | 35 | ||||
| -rw-r--r-- | src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm | 3 | ||||
| -rw-r--r-- | tests/auto/gui/text/qrawfont/tst_qrawfont.cpp | 35 |
3 files changed, 73 insertions, 0 deletions
diff --git a/src/gui/text/qfontdatabase.cpp b/src/gui/text/qfontdatabase.cpp index 2cc071d67b..33dc27983a 100644 --- a/src/gui/text/qfontdatabase.cpp +++ b/src/gui/text/qfontdatabase.cpp @@ -2837,6 +2837,41 @@ QString QFontDatabase::resolveFontFamilyAlias(const QString &family) return QGuiApplicationPrivate::platformIntegration()->fontDatabase()->resolveFontFamilyAlias(family); } +Q_GUI_EXPORT QStringList qt_sort_families_by_writing_system(QChar::Script script, const QStringList &families) +{ + size_t writingSystem = std::find(scriptForWritingSystem, + scriptForWritingSystem + QFontDatabase::WritingSystemsCount, + script) - scriptForWritingSystem; + if (writingSystem == QFontDatabase::Any + || writingSystem >= QFontDatabase::WritingSystemsCount) { + return families; + } + + QFontDatabasePrivate *db = privateDb(); + QMultiMap<uint, QString> supported; + for (int i = 0; i < families.size(); ++i) { + const QString &family = families.at(i); + + QtFontFamily *testFamily = nullptr; + for (int x = 0; x < db->count; ++x) { + if (Q_UNLIKELY(matchFamilyName(family, db->families[x]))) { + testFamily = db->families[x]; + testFamily->ensurePopulated(); + break; + } + } + + uint order = i; + if (testFamily == nullptr + || (testFamily->writingSystems[writingSystem] & QtFontFamily::Supported) == 0) { + order |= 1 << 31; + } + + supported.insert(order, family); + } + + return supported.values(); +} QT_END_NAMESPACE diff --git a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm index 237e8a89a5..7397312820 100644 --- a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm +++ b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm @@ -544,6 +544,9 @@ QStringList QCoreTextFontDatabase::fallbacksForFamily(const QString &family, QFo fallbackList.append(QStringLiteral("Arial Unicode MS")); #endif + extern QStringList qt_sort_families_by_writing_system(QChar::Script, const QStringList &); + fallbackList = qt_sort_families_by_writing_system(script, fallbackList); + return fallbackList; } } diff --git a/tests/auto/gui/text/qrawfont/tst_qrawfont.cpp b/tests/auto/gui/text/qrawfont/tst_qrawfont.cpp index ee775d4a31..37f94d0278 100644 --- a/tests/auto/gui/text/qrawfont/tst_qrawfont.cpp +++ b/tests/auto/gui/text/qrawfont/tst_qrawfont.cpp @@ -90,6 +90,9 @@ private slots: void rawFontFromInvalidData(); void kernedAdvances(); + + void fallbackFontsOrder(); + private: QString testFont; QString testFontBoldItalic; @@ -1009,6 +1012,38 @@ void tst_QRawFont::kernedAdvances() QVERIFY(FUZZY_LTEQ(qAbs(advances.at(0).x() - expectedAdvanceWidth), errorMargin)); } +void tst_QRawFont::fallbackFontsOrder() +{ + QFontDatabase fontDatabase; + int id = fontDatabase.addApplicationFont(testFont); + + QFont font("QtBidiTestFont"); + font.setPixelSize(12.0); + + QString arabicText = QFontDatabase::writingSystemSample(QFontDatabase::Arabic); + + // If this fails, then the writing system sample has changed and we need to create + // a new text containing both a space and Arabic characters. + QVERIFY(arabicText.contains(QLatin1Char(' '))); + + QTextLayout layout; + layout.setFont(font); + layout.setText(arabicText); + layout.setCacheEnabled(true); + layout.beginLayout(); + layout.createLine(); + layout.endLayout(); + + QList<QGlyphRun> glyphRuns = layout.glyphRuns(); + + // Since QtBidiTestFont does not support Arabic nor the space, both should map to + // the same font. If this fails, it is an indication that the list of fallbacks fonts + // is not sorted by writing system support. + QCOMPARE(glyphRuns.size(), 1); + + fontDatabase.removeApplicationFont(id); +} + #endif // QT_NO_RAWFONT QTEST_MAIN(tst_QRawFont) |