[meld] Minor refactor of linkmap visibility code

[Kai Willadsen <kaiw src gnome org>]

commit b973aa8127b550101e5d9649f816f6e7069facf8
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Mon Mar 22 09:22:09 2010 +1000

    Minor refactor of linkmap visibility code

 meld/filediff.py |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 7b19aa7..f8a5816 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -1296,13 +1296,8 @@ class FileDiff(melddoc.MeldDoc, gnomeglade.Component):
         context.set_line_width(1.0)
 
         which = self.linkmap.index(widget)
-        pix_start = [None] * self.num_panes
-        pix_start[which  ] = self.textview[which  ].get_visible_rect().y
-        pix_start[which+1] = self.textview[which+1].get_visible_rect().y
-
-        rel_offset = [None] * self.num_panes
-        rel_offset[which] = self.textview[which].allocation.y - yoffset
-        rel_offset[which + 1] = self.textview[which + 1].allocation.y - yoffset
+        pix_start = [t.get_visible_rect().y for t in self.textview]
+        rel_offset = [t.allocation.y - yoffset for t in self.textview]
 
         def bounds(idx):
             return [self._pixel_to_line(idx, pix_start[idx]), self._pixel_to_line(idx, pix_start[idx]+htotal)]