Introduce JSON validation

Support basic validation for JSON files according to the
draft http://tools.ietf.org/html/draft-zyp-json-schema-03.

This is not a complete implementation yet, but it should
already be useful, since "type" verification along with
many of the attributes is done.

Change-Id: I364bc98dd92937c5e2ea9cba7e15ed8e03eb9beb
Reviewed-by: Erik Verbruggen <erik.verbruggen@nokia.com>

src/plugins/qmljseditor/qmljseditorplugin.h

@@ -36,10 +36,15 @@
 #include <extensionsystem/iplugin.h>
 #include <coreplugin/icontext.h>
 #include <coreplugin/id.h>
+
 #include <QtCore/QPointer>
 
 QT_FORWARD_DECLARE_CLASS(QAction)
 
+namespace Utils {
+class JsonSchemaManager;
+}
+
 namespace TextEditor {
 class TextEditorActionHandler;
 } // namespace TextEditor
@@ -91,6 +96,8 @@ public:
 
     void initializeEditor(QmlJSEditor::QmlJSTextEditorWidget *editor);
 
+    Utils::JsonSchemaManager *jsonManager() const;
+
 public Q_SLOTS:
     void followSymbolUnderCursor();
     void findUsages();
@@ -118,6 +125,7 @@ private:
     QAction *m_reformatFileAction;
 
     QPointer<QmlJSTextEditorWidget> m_currentEditor;
+    QScopedPointer<Utils::JsonSchemaManager> m_jsonManager;
 };
 
 } // namespace Internal