crecord: honor "ui.color = no" config option

The current implementation of crecord ignores the ui.color setting.
This patch checks the ui.color config option and does the curses setup
without colors when the option is set to a falsy value. For other (or
missing) setting of ui.color, curses setup is done as before and uses
colors.

mercurial/crecord.py

@@ -581,6 +581,13 b' class curseschunkselector(object):'
         # maps custom nicknames of color-pairs to curses color-pair values
         self.colorpairnames = {}
 
+        # Honor color setting of ui section. Keep colored setup as
+        # long as not explicitly set to a falsy value - especially,
+        # when not set at all. This is to stay most compatible with
+        # previous (color only) behaviour.
+        uicolor = util.parsebool(self.ui.config('ui', 'color'))
+        self.usecolor = uicolor is not False
+
         # the currently selected header, hunk, or hunk-line
         self.currentselecteditem = self.headerlist[0]
 
@@ -1371,11 +1378,19 b' class curseschunkselector(object):'
                 colorpair = self.colorpairs[(fgcolor, bgcolor)]
             else:
                 pairindex = len(self.colorpairs) + 1
-                curses.init_pair(pairindex, fgcolor, bgcolor)
-                colorpair = self.colorpairs[(fgcolor, bgcolor)] = (
-                    curses.color_pair(pairindex))
-                if name is not None:
-                    self.colorpairnames[name] = curses.color_pair(pairindex)
+                if self.usecolor:
+                    curses.init_pair(pairindex, fgcolor, bgcolor)
+                    colorpair = self.colorpairs[(fgcolor, bgcolor)] = (
+                        curses.color_pair(pairindex))
+                    if name is not None:
+                        self.colorpairnames[name] = curses.color_pair(pairindex)
+                else:
+                    cval = 0
+                    if name is not None:
+                        if name == 'selected':
+                            cval = curses.A_REVERSE
+                        self.colorpairnames[name] = cval
+                    colorpair = self.colorpairs[(fgcolor, bgcolor)] = cval
 
         # add attributes if possible
         if attrlist is None: