Hide reload button for diff editor when there is no reloader

Refactor code a bit. Now DiffEditorController has a pointer
to DiffEditorReloader.

Change-Id: I224579127f112923bc665cd59717b0c4d833981b
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/diffeditor/diffeditorcontroller.h

@@ -37,6 +37,8 @@
 
 namespace DiffEditor {
 
+class DiffEditorReloader;
+
 class DIFFEDITOR_EXPORT DiffEditorController : public QObject
 {
     Q_OBJECT
@@ -55,6 +57,9 @@ public:
 
     QString makePatch(int diffFileIndex, int chunkIndex, bool revert) const;
 
+    DiffEditorReloader *reloader() const;
+    void setReloader(DiffEditorReloader *reloader);
+
 public slots:
     void clear();
     void clear(const QString &message);
@@ -79,11 +84,11 @@ signals:
     void descriptionEnablementChanged(bool on);
     void contextLinesNumberChanged(int lines);
     void ignoreWhitespaceChanged(bool ignore);
-    void reloadRequested();
     void chunkActionsRequested(QMenu *menu,
                                int diffFileIndex,
                                int chunkIndex);
     void expandBranchesRequested(const QString &revision);
+    void reloaderChanged(DiffEditorReloader *reloader);
 
 private:
     QString prepareBranchesForCommit(const QString &output);
@@ -95,6 +100,7 @@ private:
     bool m_descriptionEnabled;
     int m_contextLinesNumber;
     bool m_ignoreWhitespace;
+    DiffEditorReloader *m_reloader;
 };
 
 } // namespace DiffEditor