Allow more fine grained control over QMetaEnum debug output

Useful in contexts such as other QDebug operators, where the class
is already known, and the full scope of the enum is not needed.

Change-Id: Ibd04b1fd4f0f914c7224a007fc248d4ebabcde3e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 47 insertions, 7 deletions

diff --git a/src/corelib/io/qdebug.cpp b/src/corelib/io/qdebug.cpp
index e2487b927e..cc77db28de 100644
--- a/src/corelib/io/qdebug.cpp
+++ b/src/corelib/io/qdebug.cpp
@@ -916,23 +916,63 @@ void qt_QMetaEnum_flagDebugOperator(QDebug &debug, size_t sizeofT, int value)
 
 #ifndef QT_NO_QOBJECT
 /*!
+    \fn QDebug qt_QMetaEnum_debugOperator(QDebug &, int value, const QMetaObject *, const char *name)
     \internal
+
+    Formats the given enum \a value for debug output.
+
+    The supported verbosity are:
+
+      0: Just the key, or value with enum name if no key is found:
+
+         MyEnum2
+         MyEnum(123)
+         MyScopedEnum::Enum3
+         MyScopedEnum(456)
+
+      1: Same as 0, but treating all enums as scoped:
+
+         MyEnum::MyEnum2
+         MyEnum(123)
+         MyScopedEnum::Enum3
+         MyScopedEnum(456)
+
+      2: The QDebug default. Same as 0, and includes class/namespace scope:
+
+         MyNamespace::MyClass::MyEnum2
+         MyNamespace::MyClass::MyEnum(123)
+         MyNamespace::MyClass::MyScopedEnum::Enum3
+         MyNamespace::MyClass::MyScopedEnum(456)
+
+      3: Same as 2, but treating all enums as scoped:
+
+         MyNamespace::MyClass::MyEnum::MyEnum2
+         MyNamespace::MyClass::MyEnum(123)
+         MyNamespace::MyClass::MyScopedEnum::Enum3
+         MyNamespace::MyClass::MyScopedEnum(456)
  */
 QDebug qt_QMetaEnum_debugOperator(QDebug &dbg, int value, const QMetaObject *meta, const char *name)
 {
     QDebugStateSaver saver(dbg);
     dbg.nospace();
     QMetaEnum me = meta->enumerator(meta->indexOfEnumerator(name));
-    const char *key = me.valueToKey(value);
-    if (key) {
+
+    const int verbosity = dbg.verbosity();
+    if (verbosity >= QDebug::DefaultVerbosity) {
         if (const char *scope = me.scope())
             dbg << scope << "::";
-        if (me.isScoped())
-            dbg << me.enumName() << "::";
-        dbg << key;
-    } else {
-        dbg << meta->className() << "::" << name << "(" << value << ")";
     }
+
+    const char *key = me.valueToKey(value);
+    const bool scoped = me.isScoped() || verbosity & 1;
+    if (scoped || !key)
+        dbg << me.enumName() << (!key ? "(" : "::");
+
+    if (key)
+        dbg << key;
+    else
+        dbg << value << ")";
+
     return dbg;
 }