More bar

config/lemonbar/bar.py

@@ -2,21 +2,45 @@
 
 from providers import *
 
+# TODO If multiple screen, expand the sections and share them
+
 if __name__ == "__main__":
     Bar.init()
     Updater.init()
 
-    Bar.addSectionAll(I3Provider(), BarGroupType.LEFT)
+    WORKSPACE_THEME = 0
+    FOCUS_THEME = 3
+    URGENT_THEME = 1
 
-    # TODO CPU provider
-    # TODO RAM provider
-    # TODO Temperature provider
+    Bar.addSectionAll(I3WorkspacesProvider(theme=WORKSPACE_THEME, themeFocus=FOCUS_THEME, themeUrgent=URGENT_THEME, themeMode=URGENT_THEME), BarGroupType.LEFT)
+
+
+    # TODO Middle
+    Bar.addSectionAll(MpdProvider(theme=7), BarGroupType.LEFT)
+    # Bar.addSectionAll(I3WindowTitleProvider(), BarGroupType.LEFT)
+
+
+    SYSTEM_THEME = 2
+    DANGER_THEME = FOCUS_THEME
+    CRITICAL_THEME = URGENT_THEME
+    Bar.addSectionAll(CpuProvider(theme=SYSTEM_THEME, themeDanger=DANGER_THEME, themeCritical=CRITICAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(RamProvider(theme=SYSTEM_THEME, themeDanger=DANGER_THEME, themeCritical=CRITICAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(TemperatureProvider(theme=SYSTEM_THEME, themeDanger=DANGER_THEME, themeCritical=CRITICAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(BatteryProvider(theme=SYSTEM_THEME, themeDanger=DANGER_THEME, themeCritical=CRITICAL_THEME), BarGroupType.RIGHT)
+
+    # Peripherals
+    PERIPHERAL_THEME = 5
+    NETWORK_THEME = 4
     # TODO Disk space provider
     # TODO Screen (connected, autorandr configuration, bbswitch) provider
-    # TODO Unlocked keys provider
-    # TODO Mail provider
-    Bar.addSectionAll(TodoProvider(dir='~/.vdirsyncer/currentCalendars/'), BarGroupType.RIGHT)
-    Bar.addSectionAll(NetworkProvider(), BarGroupType.RIGHT)
-    Bar.addSectionAll(PulseaudioProvider(), BarGroupType.RIGHT)
-    Bar.addSectionAll(BatteryProvider(), BarGroupType.RIGHT)
-    Bar.addSectionAll(TimeProvider(), BarGroupType.RIGHT)
+    Bar.addSectionAll(PulseaudioProvider(theme=PERIPHERAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(NetworkProvider(theme=NETWORK_THEME), BarGroupType.RIGHT)
+
+    # Personal
+    PERSONAL_THEME = 0
+    Bar.addSectionAll(KeystoreProvider(theme=PERSONAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(NotmuchUnreadProvider(dir='~/.mail/', theme=PERSONAL_THEME), BarGroupType.RIGHT)
+    Bar.addSectionAll(TodoProvider(dir='~/.vdirsyncer/currentCalendars/', theme=PERSONAL_THEME), BarGroupType.RIGHT)
+
+    TIME_THEME = 6
+    Bar.addSectionAll(TimeProvider(theme=TIME_THEME), BarGroupType.RIGHT)

config/lemonbar/display.py

@@ -13,6 +13,7 @@ import subprocess
 # TODO Use bytes rather than strings
 # TODO Use default colors of lemonbar sometimes
 # TODO Mouse actions
+# TODO Adapt bar height with font height
 
 
 class BarGroupType(enum.Enum):
@@ -30,6 +31,7 @@ class Bar:
 
     # Constants
     FONTS = ["DejaVu Sans Mono for Powerline", "Font Awesome"]
+    FONTSIZE = 10
 
     @staticmethod
     def init():
@@ -37,7 +39,7 @@ class Bar:
 
         cmd = ['lemonbar', '-b']
         for font in Bar.FONTS:
-            cmd += ["-f", font]
+            cmd += ["-f", "{}:size={}".format(font, Bar.FONTSIZE)]
         Bar.process = subprocess.Popen(cmd, stdin=subprocess.PIPE)
 
         # Debug
@@ -146,11 +148,15 @@ class BarGroup:
 
     @staticmethod
     def fgColor(color):
-        return "%{F" + color + "}"
+        return "%{F" + (color or '-') + "}"
 
     @staticmethod
     def bgColor(color):
-        return "%{B" + color + "}"
+        return "%{B" + (color or '-') + "}"
+
+    @staticmethod
+    def underlineColor(color):
+        return "%{U" + (color or '-') + "}"
 
     @staticmethod
     def color(fg, bg):
@@ -190,7 +196,7 @@ class BarGroup:
                     parts.append(sec)
 
 
-            # TODO Concatenate successive strings
+            # TODO OPTI Concatenate successive strings
             self.parts = parts
 
         if self.childsTextChanged or self.childsThemeChanged:
@@ -249,6 +255,7 @@ class Section:
     sizeChanging = set()
     updateThread = SectionThread(daemon=True)
     somethingChanged = threading.Event()
+    lastChosenTheme = 0
 
     @staticmethod
     def init():
@@ -257,11 +264,15 @@ class Section:
 
         Section.updateThread.start()
 
-    def __init__(self, theme=0):
+    def __init__(self, theme=None):
         #: Displayed section
         #: Note: A section can be empty and displayed!
         self.visible = False
 
+        if theme is None:
+            theme = Section.lastChosenTheme
+            Section.lastChosenTheme = (Section.lastChosenTheme + 1) \
+                % len(Section.THEMES)
         self.theme = theme
 
         #: Displayed text
@@ -302,17 +313,62 @@ class Section:
         for parent in self.parents:
             parent.childsTextChanged = True
 
+    def parseParts(self, parts, bit='', clo=''):
+        if isinstance(parts, str):
+            parts = [parts]
+
+        bits = []
+        clos = []
+        for part in parts:
+            if isinstance(part, str):
+                for char in part:
+                    bit += char
+                    bits.append(bit)
+                    clos.append(clo)
+                    bit = ''
+            elif isinstance(part, dict):
+                newBit = ''
+                newClo = ''
+                if 'fgColor' in part:
+                    newBit = newBit + BarGroup.fgColor(part['fgColor'])
+                    newClo = BarGroup.fgColor(Section.THEMES[self.theme][0]) + newClo
+                if 'bgColor' in part:
+                    newBit = newBit + BarGroup.bgColor(part['bgColor'])
+                    newClo = BarGroup.bgColor(Section.THEMES[self.theme][0]) + newClo
+                if 'underlineColor' in part:
+                    newBit = newBit + BarGroup.underlineColor(part['underlineColor'])
+                    newClo = BarGroup.underlineColor(None) + newClo
+                if 'underline' in part:
+                    newBit = newBit + '%{+u}'
+                    newClo = '%{-u}' + newClo
+                if 'overline' in part:
+                    newBit = newBit + '%{+o}'
+                    newClo = '%{-o}' + newClo
+                newBits, newClos = self.parseParts(part["cont"], bit=newBit, clo=clo+newClo)
+                bits += newBits
+                clos += newClos
+                bit += newClo
+            else:
+                raise RuntimeError()
+
+        return bits, clos
+
     def updateText(self, text):
+        # TODO FEAT Actions
+        # TODO OPTI When srcSize == dstSize, maybe the bit array isn't
+        # needed
         if len(text):
             if isinstance(text, str):
+                # TODO OPTI This common case
                 text = [text]
-            text = [' '] + text + [' ']
 
-            raw = [(t if isinstance(t, str) else t['text']) for t in text]
-            self.dstSize = sum([len(t) for t in raw])
-            # TODO FEAT Handle colors
-            # TODO OPTI Not like that
-            self.dstText = ''.join(raw)
+            self.dstBits, self.dstClos = self.parseParts([' '] + text + [' '])
+            # TODO BUG Try this and fix some closings that aren't done
+            # self.dstBits, self.dstClos = self.parseParts(text)
+            # TODO FEAT Half-spaces
+
+            self.dstText = ''.join(self.dstBits)
+            self.dstSize = len(self.dstBits)
         else:
             self.dstSize = 0
 
@@ -340,7 +396,7 @@ class Section:
     @staticmethod
     def fit(text, size):
         t = len(text)
-        return text[:size] if t >= size else text + " " * (size - t)
+        return text[:size] if t >= size else text + [" "] * (size - t)
 
     def update(self):
         # TODO Might profit of a better logic
@@ -359,7 +415,9 @@ class Section:
             Section.sizeChanging.remove(self)
             return
 
-        self.curText = Section.fit(self.dstText, self.curSize)
+        closPos = self.curSize-1
+        clos = self.dstClos[closPos] if closPos < len(self.dstClos) else ''
+        self.curText = ''.join(Section.fit(self.dstBits, self.curSize)) + clos
         self.informParentsTextChanged()
 
     @staticmethod
@@ -377,7 +435,19 @@ class Section:
 
     @staticmethod
     def ramp(p, ramp=" ▁▂▃▄▅▆▇█"):
-        return ramp[round(p * (len(ramp)-1))]
+        if p > 1:
+            return ramp[-1]
+        elif p < 0:
+            return ramp[0]
+        else:
+            return ramp[round(p * (len(ramp)-1))]
+
+
+class StatefulSection(Section):
+    # TODO Next thing to do
+    # TODO Allow to temporary expand the section (e.g. when important change)
+    pass
+
 
 if __name__ == '__main__':
     Bar.init()

config/lemonbar/net.py

@@ -1,29 +0,0 @@
-#!/usr/bin/env python3
-
-import psutil
-import subprocess
-
-netStats = psutil.net_if_stats()
-netAddrs = psutil.net_if_addrs()
-netIO = psutil.net_io_counters(pernic=True)
-
-for iface in netStats.keys():
-    if not netStats[iface].isup or iface.startswith('lo'):
-        continue
-
-    ssid = ''
-    if iface.startswith('eth') or iface.startswith('enp'):
-        icon = 'E'
-    elif iface.startswith('wlan') or iface.startswith('wlp'):
-        icon = 'W'
-        cmd = ["iwgetid", iface, "--raw"]
-        p = subprocess.run(cmd, stdout=subprocess.PIPE)
-        ssid = p.stdout.strip().decode()
-    # TODO Real icons
-    # TODO USB tethering
-    # TODO tan / tun
-    else:
-        icon = '?'
-
-    print(icon, iface, ssid)
-    print(netIO[iface])

config/lemonbar/providers.py

@@ -11,8 +11,9 @@ import ipaddress
 import logging
 import coloredlogs
 import json
-import i3ipc
-from pprint import pprint
+import notmuch
+import mpd
+import random
 
 coloredlogs.install(level='DEBUG', fmt='%(levelname)s %(message)s')
 log = logging.getLogger()
@@ -31,53 +32,125 @@ def humanSize(num):
         num /= 1024.0
     return "{:d}YiB".format(num)
 
+def randomColor(seed=0):
+    random.seed(seed)
+    return '#{:02x}{:02x}{:02x}'.format(*[random.randint(0, 255) for _ in range(3)])
+
 
 class TimeProvider(Section, PeriodicUpdater):
     def fetcher(self):
         now = datetime.datetime.now()
         return now.strftime('%d/%m/%y %H:%M:%S')
 
-    def __init__(self):
+    def __init__(self, theme=None):
         PeriodicUpdater.__init__(self)
-        Section.__init__(self)
+        Section.__init__(self, theme)
         self.changeInterval(1)
 
 
+class CpuProvider(Section, PeriodicUpdater):
+    def fetcher(self):
+        percents = psutil.cpu_percent(percpu=True)
+        percent = psutil.cpu_percent(percpu=False)
+        theme = self.themeCritical if percent >= 90 else \
+            (self.themeDanger if percent >= 75 else self.themeNormal)
+        self.updateTheme(theme)
+        return ' ' + ''.join([Section.ramp(p/100) for p in percents])
+
+    def __init__(self, theme=None, themeDanger=None, themeCritical=None):
+        PeriodicUpdater.__init__(self)
+        Section.__init__(self, theme)
+        self.themeNormal = theme or self.theme
+        self.themeDanger = themeDanger or self.theme
+        self.themeCritical = themeCritical or self.theme
+        self.changeInterval(1)
+
+
+class RamProvider(Section, PeriodicUpdater):
+    """
+    Shows free RAM
+    """
+    def fetcher(self):
+        mem = psutil.virtual_memory()
+        ramp = Section.ramp(1-mem.percent/100)
+        free = humanSize(mem.available)
+        theme = self.themeCritical if mem.percent >= 90 else \
+            (self.themeDanger if mem.percent >= 75 else self.themeNormal)
+        self.updateTheme(theme)
+        return ' {}{}'.format(ramp, free)
+
+    def __init__(self, theme=None, themeDanger=None, themeCritical=None):
+        PeriodicUpdater.__init__(self)
+        Section.__init__(self, theme)
+        self.themeNormal = theme or self.theme
+        self.themeDanger = themeDanger or self.theme
+        self.themeCritical = themeCritical or self.theme
+        self.changeInterval(1)
+
+class TemperatureProvider(Section, PeriodicUpdater):
+    # TODO FEAT Change color when > high > critical
+
+    RAMP = ""
+
+    def fetcher(self):
+        allTemp = psutil.sensors_temperatures()
+
+        if 'coretemp' not in allTemp:
+            # TODO Opti Remove interval
+            return ''
+
+        temp = allTemp['coretemp'][0]
+
+        theme = self.themeCritical if temp.current >= temp.critical else \
+            (self.themeDanger if temp.current >= temp.high
+             else self.themeNormal)
+        self.updateTheme(theme)
+
+        ramp = Section.ramp(temp.current/temp.high, self.RAMP)
+        return '{} {:.0f}°C'.format(ramp, temp.current)
+
+    def __init__(self, theme=None, themeDanger=None, themeCritical=None):
+        PeriodicUpdater.__init__(self)
+        Section.__init__(self, theme=theme)
+        self.themeNormal = theme or self.theme
+        self.themeDanger = themeDanger or self.theme
+        self.themeCritical = themeCritical or self.theme
+        self.changeInterval(5)
+
+
 class BatteryProvider(Section, PeriodicUpdater):
+    # TODO Change color when < thresold%
 
     RAMP = ""
 
     def fetcher(self):
-        with open(self.batdir + 'status') as f:
-            status = f.read().strip()
-        if status == "Full":
-            return ""
-        elif status == "Discharging":
-            icon = ""
-        elif status == "Charging":
-            icon = ""
-        else:
-            log.warn("Unknwon battery status: {}".format(status))
-            icon = "?"
-        with open(self.batdir + 'capacity') as f:
-            capacity = int(f.read())
-        icon += self.ramp(capacity/100, self.RAMP)
-        return '{} {}%'.format(icon, capacity)
+        bat = psutil.sensors_battery()
+        text = ''
+        if not bat:
+            return text
+        if bat.power_plugged:
+            text += ""
+        text += Section.ramp(bat.percent/100, self.RAMP)
+        if bat.percent < 100:
+            text += ' {:.0f}%'.format(bat.percent)
+        theme = self.themeCritical if bat.percent < 10 else \
+            (self.themeDanger if bat.percent < 25 else self.themeNormal)
+        self.updateTheme(theme)
+        return text
 
-    def __init__(self, battery='BAT0'):
+    def __init__(self, theme=None, themeDanger=None, themeCritical=None):
         PeriodicUpdater.__init__(self)
-        Section.__init__(self)
-
-        self.batdir = '/sys/class/power_supply/{}/'.format(battery)
-        assert os.path.isdir(self.batdir)
-
+        Section.__init__(self, theme)
+        self.themeNormal = theme or self.theme
+        self.themeDanger = themeDanger or self.theme
+        self.themeCritical = themeCritical or self.theme
         self.changeInterval(5)
 
 
 class PulseaudioProvider(Section, ThreadedUpdater):
-    def __init__(self):
+    def __init__(self, theme=None):
         ThreadedUpdater.__init__(self)
-        Section.__init__(self)
+        Section.__init__(self, theme)
         self.pulseEvents = pulsectl.Pulse('event-handler')
 
         self.pulseEvents.event_mask_set(pulsectl.PulseEventMaskEnum.sink)
@@ -111,18 +184,27 @@ class PulseaudioProvider(Section, ThreadedUpdater):
     def handleEvent(self, ev):
         self.refreshData()
 
+
 class NetworkProviderSection(Section, Updater):
-    THEME = 5
 
-    def fetcher(self):
-        text = ''
+    def getIcon(self):
+        if self.iface.startswith('eth') or self.iface.startswith('enp'):
+            if 'u' in self.iface:
+                return ['']
+            else:
+                return ['']
+        elif self.iface.startswith('wlan') or self.iface.startswith('wlp'):
+            cmd = ["iwgetid", self.iface, "--raw"]
+            p = subprocess.run(cmd, stdout=subprocess.PIPE)
 
-        if self.iface not in self.parent.stats or \
-                not self.parent.stats[self.iface].isup or \
-                self.iface.startswith('lo'):
-            return text
+            ssid = p.stdout.strip().decode()
+            return [' {}'.format(ssid)]
+        elif self.iface.startswith('tun') or self.iface.startswith('tap'):
+            return ['']
+        else:
+            return ['?']
 
-        # Get addresses
+    def getAddresses(self):
         ipv4 = None
         ipv6 = None
         for address in self.parent.addrs[self.iface]:
@@ -130,31 +212,29 @@ class NetworkProviderSection(Section, Updater):
                 ipv4 = address
             elif address.family == socket.AF_INET6:
                 ipv6 = address
+        return ipv4, ipv6
+
+    def fetcher(self):
+        text = []
+
+        if self.iface not in self.parent.stats or \
+                not self.parent.stats[self.iface].isup or \
+                self.iface.startswith('lo'):
+            return text
+
+        # Get addresses
+        ipv4, ipv6 = self.getAddresses()
         if ipv4 is None and ipv6 is None:
             return text
 
-        # Set icon
-        if self.iface.startswith('eth') or self.iface.startswith('enp'):
-            if 'u' in self.iface:
-                text = ''
-            else:
-                text = ''
-        elif self.iface.startswith('wlan') or self.iface.startswith('wlp'):
-            text = ''
-            cmd = ["iwgetid", self.iface, "--raw"]
-            p = subprocess.run(cmd, stdout=subprocess.PIPE)
-
-            text += ' ' + p.stdout.strip().decode()
-        elif self.iface.startswith('tun') or self.iface.startswith('tap'):
-            text = ''
-        else:
-            text = '?'
+        text = self.getIcon()
 
         if self.showAddress:
             if ipv4:
                 netStrFull = '{}/{}'.format(ipv4.address, ipv4.netmask)
                 addr = ipaddress.IPv4Network(netStrFull, strict=False)
-                text += ' {}/{}'.format(ipv4.address, addr.prefixlen)
+                addrStr = ' {}/{}'.format(ipv4.address, addr.prefixlen)
+                text += [addrStr]
             # TODO IPV6
             # if ipv6:
             #     text += ' ' + ipv6.address
@@ -166,12 +246,12 @@ class NetworkProviderSection(Section, Updater):
                 - self.parent.prevIO[self.iface].bytes_sent
             recvDiff /= self.parent.dt
             sentDiff /= self.parent.dt
-            text += ' ↓{}↑{}'.format(humanSize(recvDiff), humanSize(sentDiff))
+            text += [' ↓{}↑{}'.format(humanSize(recvDiff), humanSize(sentDiff))]
 
         if self.showTransfer:
-            text += ' ⇓{}⇑{}'.format(
+            text += [' ⇓{}⇑{}'.format(
                 humanSize(self.parent.IO[self.iface].bytes_recv),
-                humanSize(self.parent.IO[self.iface].bytes_sent))
+                humanSize(self.parent.IO[self.iface].bytes_sent))]
 
         return text
 
@@ -188,7 +268,8 @@ class NetworkProviderSection(Section, Updater):
         self.showTransfer = state >= 3
 
     def __init__(self, iface, parent):
-        Section.__init__(self, theme=self.THEME)
+        Updater.__init__(self)
+        Section.__init__(self, theme=parent.theme)
         self.iface = iface
         self.parent = parent
         self.changeState(1)
@@ -208,9 +289,10 @@ class NetworkProvider(Section, PeriodicUpdater):
         self.last = time.perf_counter()
         self.dt = self.last - self.prev
 
-    def refreshData(self):
+    def fetcher(self):
         self.fetchData()
 
+        # Add missing sections
         lastSection = self
         for iface in sorted(list(self.ifaces)):
             if iface not in self.sections.keys():
@@ -219,21 +301,117 @@ class NetworkProvider(Section, PeriodicUpdater):
                 self.sections[iface] = section
             else:
                 section = self.sections[iface]
-            section.refreshData()
             lastSection = section
 
+        # Refresh section text
+        for section in self.sections.values():
+            section.refreshData()
+
+        return ''
+
     def addParent(self, parent):
         self.parents.add(parent)
         self.refreshData()
 
-    def __init__(self):
+    def __init__(self, theme=None):
         PeriodicUpdater.__init__(self)
-        Section.__init__(self)
+        Section.__init__(self, theme)
 
         self.sections = dict()
         self.last = 0
         self.IO = dict()
         self.fetchData()
+        self.changeInterval(5)
+
+class SshAgentProvider(PeriodicUpdater):
+    def fetcher(self):
+        cmd = ["ssh-add", "-l"]
+        proc = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
+        if proc.returncode != 0:
+            return ''
+        text = []
+        for line in proc.stdout.split(b'\n'):
+            if not len(line):
+                continue
+            fingerprint = line.split()[1]
+            text += [{"cont": '',
+                      "fgColor": randomColor(seed=fingerprint)
+                      }]
+        return text
+
+    def __init__(self):
+        PeriodicUpdater.__init__(self)
+        self.changeInterval(5)
+
+class GpgAgentProvider(PeriodicUpdater):
+    def fetcher(self):
+        cmd = ["gpg-connect-agent", "keyinfo --list", "/bye"]
+        proc = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
+        # proc = subprocess.run(cmd)
+        if proc.returncode != 0:
+            return ''
+        text = []
+        for line in proc.stdout.split(b'\n'):
+            if not len(line) or line == b'OK':
+                continue
+            spli = line.split()
+            if spli[6] != b'1':
+                continue
+            keygrip = spli[2]
+            text += [{"cont": '',
+                      "fgColor": randomColor(seed=keygrip)
+                      }]
+        return text
+
+    def __init__(self):
+        PeriodicUpdater.__init__(self)
+        self.changeInterval(5)
+
+class KeystoreProvider(Section, MergedUpdater):
+    def __init__(self, theme=None):
+        MergedUpdater.__init__(self, SshAgentProvider(), GpgAgentProvider(), prefix=[' '])
+        Section.__init__(self, theme)
+
+
+class NotmuchUnreadProvider(Section, PeriodicUpdater):
+    # TODO OPTI Transform InotifyUpdater (watching notmuch folder should be
+    # enough)
+    def fetcher(self):
+        db = notmuch.Database(mode=notmuch.Database.MODE.READ_ONLY, path=self.dir)
+        text = []
+        for account in self.accounts:
+            queryStr = 'folder:/{}/ and tag:unread'.format(account)
+            query = notmuch.Query(db, queryStr)
+            nbMsgs = query.count_messages()
+            if nbMsgs < 1:
+                continue
+            text += [' ']
+            text += [{"cont": str(nbMsgs), "fgColor": self.colors[account]}]
+        db.close()
+        if len(text):
+            return [''] + text
+        else:
+            return ''
+
+    def __init__(self, dir='~/.mail/', theme=None):
+        PeriodicUpdater.__init__(self)
+        Section.__init__(self, theme)
+
+        self.dir = os.path.realpath(os.path.expanduser(dir))
+        assert os.path.isdir(self.dir)
+
+        # Fetching account list
+        self.accounts = sorted([a for a in os.listdir(self.dir)
+                                if not a.startswith('.')])
+        # Fetching colors
+        self.colors = dict()
+        for account in self.accounts:
+            filename = os.path.join(self.dir, account, 'color')
+            with open(filename, 'r') as f:
+                color = f.read().strip()
+            self.colors[account] = color
+
+        self.changeInterval(10)
 
 
 class TodoProvider(Section, InotifyUpdater):
@@ -248,12 +426,12 @@ class TodoProvider(Section, InotifyUpdater):
                 self.addPath(os.path.join(self.dir, calendar), refresh=False)
         self.calendars = calendars
 
-    def __init__(self, dir):
+    def __init__(self, dir, theme=None):
         """
         :parm str dir: [main]path value in todoman.conf
         """
         InotifyUpdater.__init__(self)
-        Section.__init__(self)
+        Section.__init__(self, theme)
         self.dir = os.path.realpath(os.path.expanduser(dir))
         assert os.path.isdir(self.dir)
 
@@ -286,13 +464,25 @@ class TodoProvider(Section, InotifyUpdater):
             if c > 0:
                 color = self.getColor(calendar)
                 text += [' ']
-                text += [{"text": str(c), "fgColor": color}]
+                text += [{"cont": str(c), "fgColor": color}]
         if len(text):
             return [''] + text
         else:
             return ''
 
-class I3Provider(Section, ThreadedUpdater):
+class I3WindowTitleProvider(Section, I3Updater):
+    # TODO FEAT To make this available from start, we need to find the
+    # `focused=True` element following the `focus` array
+    # TODO Feat Make this output dependant if wanted
+    def on_window(self, i3, e):
+        self.updateText(e.container.name)
+
+    def __init__(self, theme=None):
+        I3Updater.__init__(self)
+        Section.__init__(self, theme=theme)
+        self.on("window", self.on_window)
+
+class I3WorkspacesProvider(Section, I3Updater):
     # TODO Multi-screen
 
     THEME_NORMAL = 0
@@ -319,18 +509,15 @@ class I3Provider(Section, ThreadedUpdater):
         for workspace in workspaces:
             # if parent.display != workspace["display"]:
             #     continue
-            theme = self.THEME_FOCUSED if workspace["focused"] \
-                else (self.THEME_URGENT if workspace["urgent"]
-                      else self.THEME_NORMAL)
+            theme = self.themeFocus if workspace["focused"] \
+                else (self.themeUrgent if workspace["urgent"]
+                      else self.theme)
             section = Section(theme=theme)
             parent.addSectionAfter(lastSection, section)
             self.setName(section, workspace["name"])
             self.sections[workspace["num"]] = section
             lastSection = section
 
-    def on_workspace(self, i3, e):
-        print(304, e.change)
-
     def on_workspace_init(self, i3, e):
         workspace = e.current
         i = workspace.num
@@ -351,11 +538,11 @@ class I3Provider(Section, ThreadedUpdater):
         self.setName(section, None)
 
     def on_workspace_focus(self, i3, e):
-        self.sections[e.current.num].updateTheme(self.THEME_FOCUSED)
-        self.sections[e.old.num].updateTheme(self.THEME_NORMAL)
+        self.sections[e.current.num].updateTheme(self.themeFocus)
+        self.sections[e.old.num].updateTheme(self.theme)
 
     def on_workspace_urgent(self, i3, e):
-        self.sections[e.current.num].updateTheme(self.THEME_URGENT)
+        self.sections[e.current.num].updateTheme(self.themeUrgent)
 
     def on_workspace_rename(self, i3, e):
         self.sections[e.current.num].updateText(e.name)
@@ -370,28 +557,77 @@ class I3Provider(Section, ThreadedUpdater):
             for section in self.sections.values():
                 section.updateText('')
 
-    def __init__(self):
-        ThreadedUpdater.__init__(self)
+    def __init__(self, theme=0, themeFocus=3, themeUrgent=1, themeMode=2):
+        I3Updater.__init__(self)
         Section.__init__(self)
+        self.theme = theme
+        self.themeFocus = themeFocus
+        self.themeUrgent = themeUrgent
 
-        self.i3 = i3ipc.Connection()
         self.sections = dict()
-        self.i3.on("workspace::init", self.on_workspace_init)
-        self.i3.on("workspace::focus", self.on_workspace_focus)
-        self.i3.on("workspace::empty", self.on_workspace_empty)
-        self.i3.on("workspace::urgent", self.on_workspace_urgent)
-        self.i3.on("workspace::rename", self.on_workspace_rename)
+        self.on("workspace::init", self.on_workspace_init)
+        self.on("workspace::focus", self.on_workspace_focus)
+        self.on("workspace::empty", self.on_workspace_empty)
+        self.on("workspace::urgent", self.on_workspace_urgent)
+        self.on("workspace::rename", self.on_workspace_rename)
         # TODO Un-handled/tested: reload, rename, restored, move
 
-        self.i3.on("mode", self.on_mode)
-
-        self.modeSection = Section(theme=self.THEME_MODE)
-        self.start()
+        self.on("mode", self.on_mode)
+        self.modeSection = Section(theme=themeMode)
 
     def addParent(self, parent):
         self.parents.add(parent)
         parent.addSection(self.modeSection)
         self.initialPopulation(parent)
 
+class MpdProvider(Section, ThreadedUpdater):
+
+    MAX_LENGTH = 50
+
+    def connect(self):
+        self.mpd.connect('localhost', 6600)
+
+    def __init__(self, theme=None):
+        ThreadedUpdater.__init__(self)
+        Section.__init__(self, theme)
+
+        self.mpd = mpd.MPDClient()
+        self.connect()
+        self.refreshData()
+        self.start()
+
+    def fetcher(self):
+        cur = self.mpd.currentsong()
+
+        if not len(cur):
+            return ''
+
+        infos = []
+
+        def tryAdd(field):
+            if field in cur:
+                infos.append(cur[field])
+
+        tryAdd("title")
+        tryAdd("album")
+        tryAdd("artist")
+
+        infosStr = " - ".join(infos)
+        if len(infosStr) > MpdProvider.MAX_LENGTH:
+            infosStr = infosStr[:MpdProvider.MAX_LENGTH-1] + '…'
+
+        text = [" {}".format(infosStr)]
+
+        return text
+
     def loop(self):
-        self.i3.main()
+        try:
+            self.mpd.idle('player')
+            self.refreshData()
+        except mpd.base.ConnectionError as e:
+            log.warn(e, exc_info=True)
+            self.connect()
+        except BaseException as e:
+            log.error(e, exc_info=True)
+
+

config/lemonbar/updaters.py

@@ -6,8 +6,14 @@ import threading
 import pyinotify
 import os
 import time
+import logging
+import coloredlogs
+import i3ipc
 
-# TODO Multiple providers for the same section
+coloredlogs.install(level='DEBUG', fmt='%(levelname)s %(message)s')
+log = logging.getLogger()
+
+# TODO Sync bar update with PeriodicUpdater updates
 
 
 class Updater:
@@ -22,13 +28,24 @@ class Updater:
     def fetcher(self):
         return "{} refreshed".format(self)
 
+    def __init__(self):
+        self.lock = threading.Lock()
+
     def refreshData(self):
-        data = self.fetcher()
+        # TODO OPTI Maybe discard the refresh if there's already another one?
+        self.lock.acquire()
+        try:
+            data = self.fetcher()
+        except BaseException as e:
+            log.error(e, exc_info=True)
+            data = ""
         self.updateText(data)
+        self.lock.release()
 
 
 class PeriodicUpdaterThread(threading.Thread):
     def run(self):
+        # TODO Sync with system clock
         counter = 0
         while True:
             if PeriodicUpdater.intervalsChanged \
@@ -184,6 +201,7 @@ class ThreadedUpdater(Updater):
     """
 
     def __init__(self):
+        Updater.__init__(self)
         self.thread = ThreadedUpdaterThread(self, daemon=True)
 
     def loop(self):
@@ -192,3 +210,55 @@ class ThreadedUpdater(Updater):
 
     def start(self):
         self.thread.start()
+
+
+class I3Updater(ThreadedUpdater):
+    # TODO OPTI One i3 connection for all
+
+    def __init__(self):
+        ThreadedUpdater.__init__(self)
+        self.i3 = i3ipc.Connection()
+        self.start()
+
+    def on(self, event, function):
+        self.i3.on(event, function)
+
+    def loop(self):
+        self.i3.main()
+
+
+class MergedUpdater(Updater):
+
+    # TODO OPTI Do not update until end of periodic batch
+    def fetcher(self):
+        text = []
+        for updater in self.updaters:
+            data = self.texts[updater]
+            if not len(data):
+                continue
+            if isinstance(data, str):
+                data = [data]
+            text += data
+        if not len(text):
+            return ''
+        return self.prefix + text + self.suffix
+
+    def __init__(self, *args, prefix=[''], suffix=['']):
+        Updater.__init__(self)
+
+        self.prefix = prefix
+        self.suffix = suffix
+        self.updaters = []
+        self.texts = dict()
+
+        for updater in args:
+            assert isinstance(updater, Updater)
+
+            def newUpdateText(updater, text):
+                self.texts[updater] = text
+                self.refreshData()
+
+            updater.updateText = newUpdateText.__get__(updater, Updater)
+
+            self.updaters.append(updater)
+            self.texts[updater] = ''