[meld] filediff: Move some common gutter renderer code into the right classes

[Kai Willadsen <kaiw src gnome org>]

commit 486055f8598ab01640e678fe259382b26286fac6
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Fri Nov 17 07:19:55 2017 +1000

    filediff: Move some common gutter renderer code into the right classes

 meld/filediff.py            |    6 ------
 meld/gutterrendererchunk.py |    7 +++++++
 2 files changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 11530d3..b44215e 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -235,9 +235,6 @@ class FileDiff(melddoc.MeldDoc, gnomeglade.Component):
                     window = Gtk.TextWindowType.LEFT
                 views = [self.textview[pane], self.textview[pane + 1]]
                 renderer = GutterRendererChunkAction(pane, pane + 1, views, self, self.linediffer)
-                renderer.set_alignment_mode(GtkSource.GutterRendererAlignmentMode.FIRST)
-                renderer.set_padding(3, 0)
-                renderer.set_alignment(0.5, 0.5)
                 gutter = t.get_gutter(window)
                 gutter.insert(renderer, 10)
             if pane in (1, 2):
@@ -246,9 +243,6 @@ class FileDiff(melddoc.MeldDoc, gnomeglade.Component):
                     window = Gtk.TextWindowType.RIGHT
                 views = [self.textview[pane], self.textview[pane - 1]]
                 renderer = GutterRendererChunkAction(pane, pane - 1, views, self, self.linediffer)
-                renderer.set_alignment_mode(GtkSource.GutterRendererAlignmentMode.FIRST)
-                renderer.set_padding(3, 0)
-                renderer.set_alignment(0.5, 0.5)
                 gutter = t.get_gutter(window)
                 gutter.insert(renderer, -40)
 
diff --git a/meld/gutterrendererchunk.py b/meld/gutterrendererchunk.py
index b0cc37c..32eb040 100644
--- a/meld/gutterrendererchunk.py
+++ b/meld/gutterrendererchunk.py
@@ -79,6 +79,11 @@ def renderer_to_gtk_state(state):
 
 class MeldGutterRenderer(object):
 
+    def set_renderer_defaults(self):
+        self.set_alignment_mode(GtkSource.GutterRendererAlignmentMode.FIRST)
+        self.set_padding(3, 0)
+        self.set_alignment(0.5, 0.5)
+
     def on_setting_changed(self, meldsettings, key):
         if key == 'style-scheme':
             self.fill_colors, self.line_colors = get_common_theme()
@@ -161,6 +166,7 @@ class GutterRendererChunkAction(
 
     def __init__(self, from_pane, to_pane, views, filediff, linediffer):
         super(GutterRendererChunkAction, self).__init__()
+        self.set_renderer_defaults()
         self.from_pane = from_pane
         self.to_pane = to_pane
         # FIXME: Views are needed only for editable checking; connect to this
@@ -345,6 +351,7 @@ class GutterRendererChunkLines(
 
     def __init__(self, from_pane, to_pane, linediffer):
         super(GutterRendererChunkLines, self).__init__()
+        self.set_renderer_defaults()
         self.from_pane = from_pane
         self.to_pane = to_pane
         # FIXME: Don't pass in the linediffer; pass a generator like elsewhere