Add support for more sequence types

This commit adds support for more sequence types by adding a sequence
wrapper.  This class enables conversion between v8::Array and C++
sequences of various types (currently just QList<int>, QList<qreal>,
QList<bool>, QList<QString>, QList<QUrl> and QStringList), but more
types can be added later if required).

When a JavaScript object is created from such a sequence, its
prototype object is set to the v8::Array prototype object.  The
indexed setter, indexed getter, length and toString methods are
implemented directly or in terms of the underlying sequence resource.

Note that currently, sequences of ValueTypes are NOT supported, due to
the fact that operations like:
     someObj.someValueTypeSequence[i].x = 5;
would not behave as required.

Task-number: QTBUG-20826
Task-number: QTBUG-21770
Change-Id: I36deb448fb0e87a32084a900e70a2604ff369309
Reviewed-by: Chris Adams <christopher.adams@nokia.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/tests/auto/declarative/qdeclarativeecmascript/data/sequenceConversion.copy.qml b/tests/auto/declarative/qdeclarativeecmascript/data/sequenceConversion.copy.qml
new file mode 100644
index 0000000000..f6614dad0c
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativeecmascript/data/sequenceConversion.copy.qml
@@ -0,0 +1,160 @@
+import QtQuick 2.0
+import Qt.test 1.0
+
+Item {
+    id: root
+    objectName: "root"
+
+    MySequenceConversionObject {
+        id: msco
+        objectName: "msco"
+    }
+
+    property bool success: true
+
+    property variant intList
+    property variant qrealList
+    property variant boolList
+    property variant stringList
+    property variant urlList
+    property variant qstringList
+
+    // this test ensures that the "copy resource" codepaths work
+    function testCopySequences() {
+        success = true;
+
+        // create "copy resource" sequences
+        var jsIntList = msco.generateIntSequence();
+        var jsQrealList = msco.generateQrealSequence();
+        var jsBoolList = msco.generateBoolSequence();
+        var jsStringList = msco.generateStringSequence();
+        var jsUrlList = msco.generateUrlSequence();
+        var jsQStringList = msco.generateQStringSequence();
+
+        if (jsIntList.toString() != [1, 2, 3].toString())
+            success = false;
+        if (jsQrealList.toString() != [1.1, 2.2, 3.3].toString())
+            success = false;
+        if (jsBoolList.toString() != [true, false, true].toString())
+            success = false;
+        if (jsStringList.toString() != ["one", "two", "three"].toString())
+            success = false;
+        if (jsUrlList.toString() != ["http://www.example1.com", "http://www.example2.com", "http://www.example3.com"].toString())
+            success = false;
+        if (jsQStringList.toString() != ["one", "two", "three"].toString())
+            success = false;
+
+        // copy the sequence; should result in a new copy
+        intList = jsIntList;
+        qrealList = jsQrealList;
+        boolList = jsBoolList;
+        stringList = jsStringList;
+        urlList = jsUrlList;
+        qstringList = jsQStringList;
+
+        // these operations shouldn't modify either variables - because
+        // we don't handle writing to the intermediate variant at list[index]
+        // for variant properties.
+        intList[1] = 8;
+        qrealList[1] = 8.8;
+        boolList[1] = true;
+        stringList[1] = "eight";
+        urlList[1] = "http://www.example8.com";
+        qstringList[1] = "eight";
+
+        if (jsIntList[1] == 8)
+            success = false;
+        if (jsQrealList[1] == 8.8)
+            success = false;
+        if (jsBoolList[1] == true)
+            success = false;
+        if (jsStringList[1] == "eight")
+            success = false;
+        if (jsUrlList[1] == "http://www.example8.com")
+            success = false;
+        if (jsQStringList[1] == "eight")
+            success = false;
+
+        // assign a "copy resource" sequence to a QObject Q_PROPERTY
+        msco.intListProperty = intList;
+        msco.qrealListProperty = qrealList;
+        msco.boolListProperty = boolList;
+        msco.stringListProperty = stringList;
+        msco.urlListProperty = urlList;
+        msco.qstringListProperty = qstringList;
+
+        if (msco.intListProperty.toString() != [1, 2, 3].toString())
+            success = false;
+        if (msco.qrealListProperty.toString() != [1.1, 2.2, 3.3].toString())
+            success = false;
+        if (msco.boolListProperty.toString() != [true, false, true].toString())
+            success = false;
+        if (msco.stringListProperty.toString() != ["one", "two", "three"].toString())
+            success = false;
+        if (msco.urlListProperty.toString() != ["http://www.example1.com", "http://www.example2.com", "http://www.example3.com"].toString())
+            success = false;
+        if (msco.qstringListProperty.toString() != ["one", "two", "three"].toString())
+            success = false;
+
+        // now modify the QObject Q_PROPERTY (reference resource) sequences - shouldn't modify the copy resource sequences.
+        msco.intListProperty[2] = 9;
+        msco.qrealListProperty[2] = 9.9;
+        msco.boolListProperty[2] = false;
+        msco.stringListProperty[2] = "nine";
+        msco.urlListProperty[2] = "http://www.example9.com";
+        msco.qstringListProperty[2] = "nine";
+
+        if (intList[2] == 9)
+            success = false;
+        if (qrealList[2] == 9.9)
+            success = false;
+        if (boolList[2] == false)
+            success = false;
+        if (stringList[2] == "nine")
+            success = false;
+        if (urlList[2] == "http://www.example9.com")
+            success = false;
+        if (qstringList[2] == "nine")
+            success = false;
+    }
+
+    property int intVal
+    property real qrealVal
+    property bool boolVal
+    property string stringVal
+
+    // this test ensures that indexed access works for copy resource sequences.
+    function readSequenceCopyElements() {
+        success = true;
+
+        var jsIntList = msco.generateIntSequence();
+        var jsQrealList = msco.generateQrealSequence();
+        var jsBoolList = msco.generateBoolSequence();
+        var jsStringList = msco.generateStringSequence();
+
+        intVal = jsIntList[1];
+        qrealVal = jsQrealList[1];
+        boolVal = jsBoolList[1];
+        stringVal = jsStringList[1];
+
+        if (intVal != 2)
+            success = false;
+        if (qrealVal != 2.2)
+            success = false;
+        if (boolVal != false)
+            success = false;
+        if (stringVal != "two")
+            success = false;
+    }
+
+    // this test ensures that equality works for copy resource sequences.
+    function testEqualitySemantics() {
+        success = true;
+
+        var jsIntList = msco.generateIntSequence();
+        var jsIntList2 = msco.generateIntSequence();
+
+        if (jsIntList == jsIntList2) success = false;
+        if (jsIntList != jsIntList) success = false;
+    }
+}