put debug Context operator where it belongs

Change-Id: I2f38d670a10bbc37c7a62432a1780ede53835160
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/coreplugin/actionmanager/actionmanager.cpp

@@ -393,14 +393,6 @@ ActionManagerPrivate::~ActionManagerPrivate()
     qDeleteAll(m_idCmdMap);
 }
 
-QDebug operator<<(QDebug d, const Context &context)
-{
-    d << "CONTEXT: ";
-    foreach (Id id, context)
-        d << "   " << id.toString();
-    return d;
-}
-
 void ActionManagerPrivate::setContext(const Context &context)
 {
     // here are possibilities for speed optimization if necessary:

src/plugins/coreplugin/icontext.cpp

@@ -24,3 +24,23 @@
 ****************************************************************************/
 
 #include "icontext.h"
+
+#include <QDebug>
+
+QDebug operator<<(QDebug debug, const Core::Context &context)
+{
+    debug.nospace() << "Context(";
+    Core::Context::const_iterator it = context.begin();
+    Core::Context::const_iterator end = context.end();
+    if (it != end) {
+        debug << *it;
+        ++it;
+    }
+    while (it != end) {
+        debug << ", " << *it;
+        ++it;
+    }
+    debug << ')';
+
+    return debug;
+}

src/plugins/coreplugin/icontext.h

@@ -84,3 +84,4 @@ protected:
 };
 
 } // namespace Core
+CORE_EXPORT QDebug operator<<(QDebug debug, const Core::Context &context);