Add fontInfo property to Text

This provides a way to determine which font will actually be
used to presenting the text, which can be especially useful when
not using a fixed size font (the font info will then expose the
actual font size used by the Text element.)

[ChangeLog][QtQuick][Text] Added fontInfo property to Text type,
providing a way to query properties of the actual font used
for presenting the text.

Task-number: QTBUG-51133
Change-Id: I5860fb1bd25ac5734713f49c8482428f2d531d22
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Robin Burchell <robin.burchell@crimson.no>

2 files changed, 43 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicktext/data/fontInfo.qml b/tests/auto/quick/qquicktext/data/fontInfo.qml
new file mode 100644
index 0000000000..25f924029f
--- /dev/null
+++ b/tests/auto/quick/qquicktext/data/fontInfo.qml
@@ -0,0 +1,24 @@
+import QtQuick 2.9
+
+Item {
+    Text {
+        id: main
+        objectName: "main"
+        width: 500
+        height: 500
+        text: "Meaningless text"
+        font.pixelSize: 1000
+        fontSizeMode: Text.Fit
+    }
+
+    Text {
+        objectName: "copy"
+        text: main.text
+        width: main.width
+        height: main.height
+
+        font.family: main.fontInfo.family
+        font.pixelSize: main.fontInfo.pixelSize
+    }
+}
+
diff --git a/tests/auto/quick/qquicktext/tst_qquicktext.cpp b/tests/auto/quick/qquicktext/tst_qquicktext.cpp
index 034ea4aec8..f741062d42 100644
--- a/tests/auto/quick/qquicktext/tst_qquicktext.cpp
+++ b/tests/auto/quick/qquicktext/tst_qquicktext.cpp
@@ -154,6 +154,8 @@ private slots:
     void hAlignWidthDependsOnImplicitWidth_data();
     void hAlignWidthDependsOnImplicitWidth();
 
+    void fontInfo();
+
 private:
     QStringList standard;
     QStringList richText;
@@ -4253,6 +4255,23 @@ void tst_qquicktext::hAlignWidthDependsOnImplicitWidth()
     QCOMPARE(numberOfNonWhitePixels(0, rectX - 1, image), 0);
 }
 
+void tst_qquicktext::fontInfo()
+{
+    QQmlComponent component(&engine, testFile("fontInfo.qml"));
+
+    QScopedPointer<QObject> object(component.create());
+    QObject *root = object.data();
+
+    QQuickText *main = root->findChild<QQuickText *>("main");
+    QVERIFY(main);
+    QCOMPARE(main->font().pixelSize(), 1000);
+
+    QQuickText *copy = root->findChild<QQuickText *>("copy");
+    QVERIFY(copy);
+    QCOMPARE(copy->font().family(), QFontInfo(QFont()).family());
+    QVERIFY(copy->font().pixelSize() < 1000);
+}
+
 QTEST_MAIN(tst_qquicktext)
 
 #include "tst_qquicktext.moc"