VCS: Add "Open file" context menu action to VCS log pane

to be used for status/opened output. enabling convenient opening.
Append repository as block data to log text to be able to resolve
relative paths.

src/plugins/vcsbase/vcsbaseoutputwindow.h

@@ -41,11 +41,16 @@ struct VCSBaseOutputWindowPrivate;
 /* Common OutputWindow for Version Control System command and other output.
  * Installed by the base plugin and accessible for the other plugins
  * via static instance()-accessor. Provides slots to append output with
- * special formatting. */
+ * special formatting.
+ * It is possible to associate a repository with plain log text, enabling
+ * an "Open" context menu action over relative file name tokens in the text
+ * (absolute paths will also work). This can be used for "status" logs,
+ * showing modified file names, allowing the user to open them. */
 
 class VCSBASE_EXPORT VCSBaseOutputWindow : public Core::IOutputPane
 {
     Q_OBJECT
+    Q_PROPERTY(QString repository READ repository WRITE setRepository)
 public:
     virtual ~VCSBaseOutputWindow();
 
@@ -70,7 +75,12 @@ public:
 
     static VCSBaseOutputWindow *instance();
 
+    QString repository() const;
+
 public slots:
+    void setRepository(const QString &);
+    void clearRepository();
+
     // Set the whole text.
     void setText(const QString &text);
     // Set text from QProcess' output data using the Locale's converter.