Allow a revision to be associated with properties and methods.

Allows a revision to be associated with properties via:
    Q_PROPERTY(int prop READ prop1 REVISION 1)

Allows a revision to be associated with methods via either:
    public slots Q_REVISION(1):
        void method1();
or:
    public slots:
        Q_REVISION void method1();

Private revision() methods are added to QMetaProperty and QMetaMethod
to access the revision info.  This is private API for use by QML for
now.

Task-number: QTBUG-13451
Reviewed-by: Kent Hansen

4 files changed, 57 insertions, 2 deletions

diff --git a/src/corelib/kernel/qmetaobject.cpp b/src/corelib/kernel/qmetaobject.cpp
index 9854e68..dd5f231 100644
--- a/src/corelib/kernel/qmetaobject.cpp
+++ b/src/corelib/kernel/qmetaobject.cpp
@@ -1369,6 +1369,25 @@ int QMetaMethod::methodIndex() const
 }
 
 /*!
+    \internal
+
+    Returns the method revision if one was
+    specified by Q_REVISION, otherwise returns 0.
+ */
+int QMetaMethod::revision() const
+{
+    if (!mobj)
+        return 0;
+    if ((QMetaMethod::Access)(mobj->d.data[handle + 4] & MethodRevisioned)) {
+        int offset = priv(mobj->d.data)->methodData
+                     + priv(mobj->d.data)->methodCount * 5
+                     + (handle - priv(mobj->d.data)->methodData) / 5;
+        return mobj->d.data[offset];
+    }
+    return 0;
+}
+
+/*!
     Returns the access specification of this method (private,
     protected, or public).
 
@@ -2389,6 +2408,35 @@ int QMetaProperty::notifySignalIndex() const
 }
 
 /*!
+    \internal
+
+    Returns the property revision if one was
+    specified by REVISION, otherwise returns 0.
+ */
+int QMetaProperty::revision() const
+{
+    if (!mobj)
+        return 0;
+    int flags = mobj->d.data[handle + 2];
+    if (flags & Revisioned) {
+        int offset = priv(mobj->d.data)->propertyData +
+                     priv(mobj->d.data)->propertyCount * 3 + idx;
+        // Revision data is placed after NOTIFY data, if present.
+        // Iterate through properties to discover whether we have NOTIFY signals.
+        for (int i = 0; i < priv(mobj->d.data)->propertyCount; ++i) {
+            int handle = priv(mobj->d.data)->propertyData + 3*i;
+            if (mobj->d.data[handle + 2] & Notify) {
+                offset += priv(mobj->d.data)->propertyCount;
+                break;
+            }
+        }
+        return mobj->d.data[offset];
+    } else {
+        return 0;
+    }
+}
+
+/*!
     Returns true if this property is writable; otherwise returns
     false.
 
diff --git a/src/corelib/kernel/qmetaobject.h b/src/corelib/kernel/qmetaobject.h
index b700351..1ab08ee 100644
--- a/src/corelib/kernel/qmetaobject.h
+++ b/src/corelib/kernel/qmetaobject.h
@@ -70,6 +70,7 @@ public:
     enum Attributes { Compatibility = 0x1, Cloned = 0x2, Scriptable = 0x4 };
     int attributes() const;
     int methodIndex() const;
+    int revision() const;
 
     inline const QMetaObject *enclosingMetaObject() const { return mobj; }
 
@@ -200,6 +201,8 @@ public:
     QMetaMethod notifySignal() const;
     int notifySignalIndex() const;
 
+    int revision() const;
+
     QVariant read(const QObject *obj) const;
     bool write(QObject *obj, const QVariant &value) const;
     bool reset(QObject *obj) const;
diff --git a/src/corelib/kernel/qmetaobject_p.h b/src/corelib/kernel/qmetaobject_p.h
index 4a03874..7b103e2 100644
--- a/src/corelib/kernel/qmetaobject_p.h
+++ b/src/corelib/kernel/qmetaobject_p.h
@@ -78,7 +78,8 @@ enum PropertyFlags  {
     ResolveEditable = 0x00080000,
     User = 0x00100000,
     ResolveUser = 0x00200000,
-    Notify = 0x00400000
+    Notify = 0x00400000,
+    Revisioned = 0x00800000
 };
 
 enum MethodFlags  {
@@ -95,7 +96,8 @@ enum MethodFlags  {
 
     MethodCompatibility = 0x10,
     MethodCloned = 0x20,
-    MethodScriptable = 0x40
+    MethodScriptable = 0x40,
+    MethodRevisioned = 0x80
 };
 
 enum MetaObjectFlags {
diff --git a/src/corelib/kernel/qobjectdefs.h b/src/corelib/kernel/qobjectdefs.h
index 555a1f5..d1a8f06 100644
--- a/src/corelib/kernel/qobjectdefs.h
+++ b/src/corelib/kernel/qobjectdefs.h
@@ -79,6 +79,7 @@ class QString;
 #define Q_INTERFACES(x)
 #define Q_PROPERTY(text)
 #define Q_PRIVATE_PROPERTY(d, text)
+#define Q_REVISION(v)
 #define Q_OVERRIDE(text)
 #define Q_ENUMS(x)
 #define Q_FLAGS(x)
@@ -180,6 +181,7 @@ private:
 #define Q_INTERFACES(x) Q_INTERFACES(x)
 #define Q_PROPERTY(text) Q_PROPERTY(text)
 #define Q_PRIVATE_PROPERTY(d, text) Q_PRIVATE_PROPERTY(d, text)
+#define Q_REVISION(v) Q_REVISION(v)
 #define Q_OVERRIDE(text) Q_OVERRIDE(text)
 #define Q_ENUMS(x) Q_ENUMS(x)
 #define Q_FLAGS(x) Q_FLAGS(x)