Use category min/max in change list colors

When colorizing the votes on the change list, look up the category
min and max values to use the stronger versions of those colors
only if the min or max values are present.

Change-Id: I37525f0d9cda09b644a4a9dac5266cb6d56ca346

gertty/db.py

@@ -231,6 +231,22 @@ class Change(object):
             cat_value[approval.category] = cur_value
         self._approval_cache = cat_value
 
+    def getMinMaxPermittedForCategory(self, category):
+        if not hasattr(self, '_permitted_cache'):
+            self._updatePermittedCache()
+        return self._permitted_cache.get(category, (0,0))
+
+    def _updatePermittedCache(self):
+        cache = {}
+        for label in self.labels:
+            if label.category not in cache:
+                cache[label.category] = [0, 0]
+            if label.value > cache[label.category][1]:
+                cache[label.category][1] = label.value
+            if label.value < cache[label.category][0]:
+                cache[label.category][0] = label.value
+        self._permitted_cache = cache
+
     def createRevision(self, *args, **kw):
         session = Session.object_session(self)
         args = [self] + list(args)

gertty/palette.py

@@ -23,6 +23,10 @@ DEFAULT_PALETTE={
     'negative-label': ['dark red', ''],
     'max-label': ['light green', ''],
     'min-label': ['light red', ''],
+    'focused-positive-label': ['dark green,standout', ''],
+    'focused-negative-label': ['dark red,standout', ''],
+    'focused-max-label': ['light green,standout', ''],
+    'focused-min-label': ['light red,standout', ''],
     'link': ['dark blue', ''],
     'focused-link': ['light blue', ''],
     # Diff

gertty/view/change.py

@@ -569,14 +569,8 @@ class ChangeView(urwid.WidgetWrap):
             self.commit_message.set_text(change.revisions[-1].message)
 
             categories = []
-            max_values = {}
-            min_values = {}
             approval_headers = [urwid.Text(('table-header', 'Name'))]
             for label in change.labels:
-                if label.value > max_values.get(label.category, 0):
-                    max_values[label.category] = label.value
-                if label.value < min_values.get(label.category, 0):
-                    min_values[label.category] = label.value
                 if label.category in categories:
                     continue
                 approval_headers.append(urwid.Text(('table-header', label.category)))
@@ -600,15 +594,16 @@ class ChangeView(urwid.WidgetWrap):
                     approvals_for_name[approval.reviewer.name] = approvals
                     votes.addRow(row)
                 if str(approval.value) != '0':
+                    cat_min, cat_max = change.getMinMaxPermittedForCategory(approval.category)
                     if approval.value > 0:
                         val = '+%i' % approval.value
-                        if approval.value == max_values.get(approval.category):
+                        if approval.value == cat_max:
                             val = ('max-label', val)
                         else:
                             val = ('positive-label', val)
                     else:
                         val = '%i' % approval.value
-                        if approval.value == min_values.get(approval.category):
+                        if approval.value == cat_min:
                             val = ('min-label', val)
                         else:
                             val = ('negative-label', val)

gertty/view/change_list.py

@@ -50,6 +50,10 @@ class ChangeRow(urwid.Button):
     change_focus_map = {None: 'focused',
                         'unreviewed-change': 'focused-unreviewed-change',
                         'reviewed-change': 'focused-reviewed-change',
+                        'positive-label': 'focused-positive-label',
+                        'negative-label': 'focused-negative-label',
+                        'min-label': 'focused-min-label',
+                        'max-label': 'focused-max-label',
                         }
 
     def selectable(self):
@@ -100,14 +104,22 @@ class ChangeRow(urwid.Button):
         del self.columns.contents[self.num_columns:]
         for category in categories:
             v = change.getMaxForCategory(category)
+            cat_min, cat_max = change.getMinMaxPermittedForCategory(category)
             if v == 0:
-                v = ''
-            elif v < 0:
-                v = ('min-label', '%2i' % v)
+                val = ''
             elif v > 0:
-                v = ('max-label', '%2i' % v)
-
-            self.columns.contents.append((urwid.Text(v), self.columns.options('given', 2)))
+                val = '%2i' % v
+                if v == cat_max:
+                    val = ('max-label', val)
+                else:
+                    val = ('positive-label', val)
+            else:
+                val = '%i' % v
+                if v == cat_min:
+                    val = ('min-label', val)
+                else:
+                    val = ('negative-label', val)
+            self.columns.contents.append((urwid.Text(val), self.columns.options('given', 2)))
 
 class ChangeListHeader(urwid.WidgetWrap):
     def __init__(self, project=False, owner=False, updated=False):