Fix crash issue for path animation and path interpulator

When set progress value out of [0,1], path animation and
path interpulator should make sure the value be modified
in the valid value range, otherwise the QQuickPath::backwardsPointAt()
will crash.

Task-number: QTBUG-24308
Change-Id: Icd6e9165c9f844ddb8ec84c229eac4db5246a749
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>

2 files changed, 50 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml b/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml
new file mode 100644
index 0000000000..1ee76f6906
--- /dev/null
+++ b/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml
@@ -0,0 +1,26 @@
+import QtQuick 2.0
+Item {
+    id: root
+    width: 450; height: 600
+
+    Rectangle {
+        objectName:"rect"
+        id: rect
+        x:200
+        y:500
+        width: 225; height: 40
+        color: "lightsteelblue"
+    }
+    PathAnimation {
+        id:anim
+        running:true
+        duration: 200
+
+        easing.type: Easing.InOutBack
+
+        target:rect
+        path: Path {
+            PathLine { x: 0; y: 0 }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/auto/quick/qquickanimations/tst_qquickanimations.cpp b/tests/auto/quick/qquickanimations/tst_qquickanimations.cpp
index d71100d120..166f4b8276 100644
--- a/tests/auto/quick/qquickanimations/tst_qquickanimations.cpp
+++ b/tests/auto/quick/qquickanimations/tst_qquickanimations.cpp
@@ -107,6 +107,7 @@ private slots:
     void pauseBug();
     void loopingBug();
     void anchorBug();
+    void pathAnimationInOutBackBug();
 };
 
 #define QTIMED_COMPARE(lhs, rhs) do { \
@@ -455,6 +456,13 @@ void tst_qquickanimations::pathInterpolator()
     QCOMPARE(interpolator->x(), qreal(300));
     QCOMPARE(interpolator->y(), qreal(300));
     QCOMPARE(interpolator->angle(), qreal(0));
+
+    //for path interpulator the progress value must be [0,1] range.
+    interpolator->setProgress(1.1);
+    QCOMPARE(interpolator->progress(), qreal(1));
+
+    interpolator->setProgress(-0.000123);
+    QCOMPARE(interpolator->progress(), qreal(0));
 }
 
 void tst_qquickanimations::pathInterpolatorBackwardJump()
@@ -1171,6 +1179,22 @@ void tst_qquickanimations::runningTrueBug()
     QVERIFY(cloud->x() > qreal(0));
 }
 
+//QTBUG-24308
+void tst_qquickanimations::pathAnimationInOutBackBug()
+{
+    //ensure we don't pass bad progress value (out of [0,1]) to  QQuickPath::backwardsPointAt()
+    QQmlEngine engine;
+    QQmlComponent c(&engine, testFileUrl("pathAnimationInOutBackCrash.qml"));
+    QQuickItem *item = qobject_cast<QQuickItem*>(c.create());
+    QVERIFY(item);
+
+    QQuickRectangle *rect = item->findChild<QQuickRectangle *>("rect");
+    QVERIFY(rect);
+    QTest::qWait(1000);
+    QCOMPARE(rect->x(), qreal(0));
+    QCOMPARE(rect->y(), qreal(0));
+}
+
 //QTBUG-12805
 void tst_qquickanimations::nonTransitionBug()
 {