QCss: font-family handle fallback font specs

if one specify more than one parameter in  font-family,
e.g., font-family: Verdana, Arial
Qt should fallback on the second font if the first cannot be found.

QFont::setFamily handle the case when the family name contains a comas,
so we do not need to handle that specially in the css parser code.

Task-number: 252311
Reviewed-by: Thomas Zander

3 files changed, 21 insertions, 15 deletions

diff --git a/doc/src/stylesheet.qdoc b/doc/src/stylesheet.qdoc
index c0d13da..f895918 100644
--- a/doc/src/stylesheet.qdoc
+++ b/doc/src/stylesheet.qdoc
@@ -1872,10 +1872,6 @@
 
            \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 54
 
-        \note If you specify more than one parameter in \c font-family,
-        e.g., \c{font-family: Verdana, Arial}, Qt will only use the first
-        font. If it cannot be found, Qt uses the system fallbacks instead.
-
     \row
         \o \c font-size
         \o \l{#Font Size}{Font Size}
diff --git a/src/gui/text/qcssparser.cpp b/src/gui/text/qcssparser.cpp
index 8214e54..38621c1 100644
--- a/src/gui/text/qcssparser.cpp
+++ b/src/gui/text/qcssparser.cpp
@@ -1161,13 +1161,20 @@ static bool setFontWeightFromValue(const Value &value, QFont *font)
     return true;
 }
 
-static bool setFontFamilyFromValues(const QVector<Value> &values, QFont *font)
+/** \internal
+ * parse the font family from the values (starting from index \a start)
+ * and set it the \a font
+ * \returns true if a family was extracted.
+ */
+static bool setFontFamilyFromValues(const QVector<Value> &values, QFont *font, int start = 0)
 {
     QString family;
-    for (int i = 0; i < values.count(); ++i) {
+    for (int i = start; i < values.count(); ++i) {
         const Value &v = values.at(i);
-        if (v.type == Value::TermOperatorComma)
-            break;
+        if (v.type == Value::TermOperatorComma) {
+            family += QLatin1Char(',');
+            continue;
+        }
         const QString str = v.variant.toString();
         if (str.isEmpty())
             break;
@@ -1221,9 +1228,7 @@ static void parseShorthandFontProperty(const QVector<Value> &values, QFont *font
     }
 
     if (i < values.count()) {
-        QString fam = values.at(i).variant.toString();
-        if (!fam.isEmpty())
-            font->setFamily(fam);
+        setFontFamilyFromValues(values, font, i);
     }
 }
 
diff --git a/tests/auto/qcssparser/tst_cssparser.cpp b/tests/auto/qcssparser/tst_cssparser.cpp
index ab6bad6..7c4fac1 100644
--- a/tests/auto/qcssparser/tst_cssparser.cpp
+++ b/tests/auto/qcssparser/tst_cssparser.cpp
@@ -123,7 +123,7 @@ static void debug(const QVector<QCss::Symbol> &symbols, int index = -1)
         qDebug() << "failure at index" << index;
 }
 
-static void debug(const QCss::Parser &p) { debug(p.symbols); }
+//static void debug(const QCss::Parser &p) { debug(p.symbols); }
 
 void tst_CssParser::scanner()
 {
@@ -1473,7 +1473,12 @@ void tst_CssParser::extractFontFamily_data()
     QTest::newRow("quoted-family-name") << "font-family: 'Times New Roman'" << QString("Times New Roman");
     QTest::newRow("unquoted-family-name") << "font-family: Times New Roman" << QString("Times New Roman");
     QTest::newRow("unquoted-family-name2") << "font-family: Times        New     Roman" << QString("Times New Roman");
-    QTest::newRow("multiple") << "font-family: Times New   Roman  , foobar, 'baz'" << QString("Times New Roman");
+    QTest::newRow("multiple") << "font-family: Times New Roman  , foobar, 'baz'" << QString("Times New Roman");
+    QTest::newRow("multiple2") << "font-family: invalid,  Times New   Roman " << QString("Times New Roman");
+    QTest::newRow("invalid") << "font-family: invalid" << QFont().family();
+    QTest::newRow("shorthand") << "font: 12pt Times New Roman" << QString("Times New Roman");
+    QTest::newRow("shorthand multiple quote") << "font: 12pt invalid, \"Times New Roman\" " << QString("Times New Roman");
+    QTest::newRow("shorthand multiple") << "font: 12pt invalid, Times New Roman " << QString("Times New Roman");
 }
 
 void tst_CssParser::extractFontFamily()
@@ -1497,8 +1502,8 @@ void tst_CssParser::extractFontFamily()
     int adjustment = 0;
     QFont fnt;
     extractor.extractFont(&fnt, &adjustment);
-
-    QTEST(fnt.family(), "expectedFamily");
+    QFontInfo info(fnt);
+    QTEST(info.family(), "expectedFamily");
 }
 
 void tst_CssParser::extractBorder_data()