[core/themes] Add separator customization

Add customized separators:
* The default separators are automatically disabled if custom separators
  are used (to "just" disable the default, use empty custom separators)
* Use previous background color as their background color and the
  current background color as foreground color
* Allow the separator-block-width to be configured

see #23

bumblebee/output.py

@@ -48,10 +48,21 @@ class I3BarOutput(object):
             full_text = u"{}{}".format(prefix, full_text)
         if suffix:
             full_text = u"{}{}".format(full_text, suffix)
+        separator = self._theme.separator(widget)
+        if separator:
+            self._widgets.append({
+                u"full_text": separator,
+                "separator": False,
+                "color": self._theme.separator_fg(widget),
+                "background": self._theme.separator_bg(widget),
+                "separator_block_width": self._theme.separator_block_width(widget),
+            })
         self._widgets.append({
-            u"full_text": u"{}".format(full_text),
+            u"full_text": full_text,
             "color": self._theme.fg(widget),
             "background": self._theme.bg(widget),
+            "separator_block_width": self._theme.separator_block_width(widget),
+            "separator": True if separator is None else False,
         })
 
     def begin(self):

bumblebee/theme.py

@@ -36,6 +36,7 @@ class Theme(object):
         self._cycle = self._cycles[0] if len(self._cycles) > 0 else {}
         self._cycle_idx = 0
         self._widget = None
+        self._prevbg = None
 
     def prefix(self, widget):
         """Return the theme prefix for a widget's full text"""
@@ -57,6 +58,20 @@ class Theme(object):
         """Return the background color for this widget"""
         return self._get(widget, "bg", None)
 
+    def separator(self, widget):
+        """Return the separator between widgets"""
+        return self._get(widget, "separator", None)
+
+    def separator_fg(self, widget):
+        return self.bg(widget)
+
+    def separator_bg(self, widget):
+        return self._prevbg
+
+    def separator_block_width(self, widget):
+        """Return the SBW"""
+        return self._get(widget, "separator-block-width", None)
+
     def loads(self, data):
         """Initialize the theme from a JSON string"""
         theme = json.loads(data)
@@ -87,9 +102,11 @@ class Theme(object):
             self._widget = widget
 
         if self._widget != widget:
+            self._prevbg = self.bg(self._widget)
             self._widget = widget
-            self._cycle_idx = (self._cycle_idx + 1) % len(self._cycles)
+            if len(self._cycles) > 0:
-            self._cycle = self._cycles[self._cycle_idx]
+                self._cycle_idx = (self._cycle_idx + 1) % len(self._cycles)
+                self._cycle = self._cycles[self._cycle_idx]
 
         module_theme = self._theme.get(widget.module, {})
 

tests/test_theme.py

@@ -61,6 +61,14 @@ class TestTheme(unittest.TestCase):
         self.themedWidget.module = self.widgetTheme
         self.assertEquals(self.theme.bg(self.themedWidget), self.widgetBgColor)
 
+    def test_absent_cycle(self):
+        theme = self.theme
+        try:
+            theme.fg(self.anyWidget)
+            theme.fg(self.anotherWidget)
+        except Exception as e:
+            self.fail(e)
+
     def test_reset(self):
         theme = self.cycleTheme
         data = theme.data()
@@ -70,4 +78,20 @@ class TestTheme(unittest.TestCase):
         theme.reset()
         self.assertEquals(theme.fg(self.anyWidget), data["cycle"][0]["fg"])
 
+    def test_separator_block_width(self):
+        theme = self.theme
+        data = theme.data()
+
+        self.assertEquals(theme.separator_block_width(self.anyWidget), data["defaults"]["separator-block-width"])
+
+    def test_separator(self):
+        for theme in [self.theme, self.cycleTheme]:
+            data = theme.data()
+            theme.reset()
+            prev_bg = theme.bg(self.anyWidget)
+            theme.bg(self.anotherWidget)
+
+            self.assertEquals(theme.separator_fg(self.anotherWidget), theme.bg(self.anotherWidget))
+            self.assertEquals(theme.separator_bg(self.anotherWidget), prev_bg)
+
 # vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

tests/util.py

@@ -45,10 +45,18 @@ class MockTheme(object):
         self.attr_suffix = None
         self.attr_fg = None
         self.attr_bg = None
+        self.attr_separator = None
+        self.attr_separator_block_width = 0
 
     def reset(self):
         pass
 
+    def separator_block_width(self, widget):
+        return self.attr_separator_block_width
+
+    def separator(self, widget):
+        return self.attr_separator
+
     def prefix(self, widget):
         return self.attr_prefix
 

themes/solarized-powerline.json

@@ -1,7 +1,6 @@
 {
 	"icons": [ "awesome-fonts" ],
 	"defaults": {
-		"default-separators": false,
 		"separator-block-width": 0,
 		"warning": {
 			"fg": "#002b36",

themes/test.json

@@ -4,7 +4,9 @@
 		"prefix": "default-prefix",
 		"suffix": "default-suffix",
 		"fg": "#000000",
-		"bg": "#111111"
+		"bg": "#111111",
+		"separator": " * ",
+		"separator-block-width": 10
 	},
 	"test-widget": {
 		"fg": "#ababab",