Introduce PropertyList functions isEmpty and clear.

These functions test whether the PropertyList object has any data
loaded, and clears any existing data from the object, respectively.

Change-Id: I9dfa0e7629dccd3090fc0d5de33481c8e7caf424
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/src/lib/corelib/jsextensions/propertylist.h b/src/lib/corelib/jsextensions/propertylist.h
index 1b211af99..69a8696dd 100644
--- a/src/lib/corelib/jsextensions/propertylist.h
+++ b/src/lib/corelib/jsextensions/propertylist.h
@@ -50,6 +50,8 @@ public:
     static QScriptValue ctor(QScriptContext *context, QScriptEngine *engine);
     PropertyList(QScriptContext *context);
     ~PropertyList();
+    Q_INVOKABLE bool isEmpty() const;
+    Q_INVOKABLE void clear();
     Q_INVOKABLE void readFromString(const QString &input);
     Q_INVOKABLE void readFromFile(const QString &filePath);
     Q_INVOKABLE void writeToFile(const QString &filePath, const QString &plistFormat);
diff --git a/src/lib/corelib/jsextensions/propertylist.mm b/src/lib/corelib/jsextensions/propertylist.mm
index ac0323e2c..4c35a3911 100644
--- a/src/lib/corelib/jsextensions/propertylist.mm
+++ b/src/lib/corelib/jsextensions/propertylist.mm
@@ -109,6 +109,22 @@ PropertyList::PropertyList(QScriptContext *context)
     Q_ASSERT(thisObject().engine() == engine());
 }
 
+bool PropertyList::isEmpty() const
+{
+    Q_ASSERT(thisObject().engine() == engine());
+    PropertyList *p = qscriptvalue_cast<PropertyList*>(thisObject());
+    return !p->d->propertyListObject;
+}
+
+void PropertyList::clear()
+{
+    Q_ASSERT(thisObject().engine() == engine());
+    PropertyList *p = qscriptvalue_cast<PropertyList*>(thisObject());
+    [p->d->propertyListObject release];
+    p->d->propertyListObject = nil;
+    p->d->propertyListFormat = 0;
+}
+
 void PropertyList::readFromString(const QString &input)
 {
     Q_ASSERT(thisObject().engine() == engine());