Add highlight support to thetext backend

- The highlights are saved in the same db we save the bookmarks.
- The highlights can be removed selecting again the same tex, or a subportion of the text
  or puting the cursos inside the highlighted area.

1 files changed, 3 insertions, 0 deletions

diff --git a/evinceadapter.py b/evinceadapter.py
index ad79189..c37562c 100644
--- a/evinceadapter.py
+++ b/evinceadapter.py
@@ -109,6 +109,9 @@ class EvinceViewer():
                           self._model.props.sizing_mode)
         self.metadata['Read_sizing_mode'] = "fit-width"
 
+    def can_highlight(self):
+        return False
+
     def get_zoom(self):
         '''
         Returns the current zoom level