widgets: reuse existing datasets where appropriate

Gmail, mbox, raid, weather and wifi could return the old value in case
there isn't new data, no need for N/A to be so common on our wibox.

widgets/cpu.lua

@@ -21,7 +21,7 @@ local string = {
 module("vicious.widgets.cpu")
 
 
--- Initialise function tables
+-- Initialize function tables
 local cpu_usage  = {}
 local cpu_total  = {}
 local cpu_active = {}

widgets/dio.lua

@@ -16,7 +16,7 @@ local helpers = require("vicious.helpers")
 module("vicious.widgets.dio")
 
 
--- Initialise function tables
+-- Initialize function tables
 local disk_usage = {}
 local disk_total = {}
 -- Variable definitions

widgets/gmail.lua

@@ -38,16 +38,15 @@ local rss = {
 
 -- Default is all unread
 local feed = rss.unread
+local mail = {
+    ["{count}"]   = 0,
+    ["{subject}"] = "N/A"
+}
 -- }}}
 
 
 -- {{{ Gmail widget type
 local function worker(format, warg)
-    local mail = {
-        ["{count}"]   = 0,
-        ["{subject}"] = "N/A"
-    }
-
     -- Get info from the Gmail atom feed
     local f = io.popen("curl --connect-timeout 1 -m 3 -fsn " .. feed[1])
 

widgets/mbox.lua

@@ -16,13 +16,13 @@ local helpers = require("vicious.helpers")
 module("vicious.widgets.mbox")
 
 
+-- Initialize variables
+local subject = "N/A"
+
 -- {{{ Mailbox widget type
 local function worker(format, warg)
     if not warg then return end
 
-    -- Default value
-    local subject = "N/A"
-
     -- mbox could be huge, get a 30kb chunk from EOF
     if type(warg) ~= "table" then mbox = warg end
     -- * attachment could be much bigger than 30kb

widgets/mboxc.lua

@@ -18,7 +18,7 @@ module("vicious.widgets.mboxc")
 local function worker(format, warg)
     if not warg then return end
 
-    -- Initialise counters
+    -- Initialize counters
     local count = { old = 0, total = 0, new = 0 }
 
     -- Get data from mbox files

widgets/mdir.lua

@@ -18,7 +18,7 @@ module("vicious.widgets.mdir")
 local function worker(format, warg)
     if not warg then return end
 
-    -- Initialise counters
+    -- Initialize counters
     local count = { new = 0, cur = 0 }
 
     for i=1, #warg do

widgets/net.lua

@@ -18,7 +18,7 @@ local helpers = require("vicious.helpers")
 module("vicious.widgets.net")
 
 
--- Initialise function tables
+-- Initialize function tables
 local nets = {}
 -- Variable definitions
 local unit = { ["b"] = 1, ["kb"] = 1024,

widgets/org.lua

@@ -28,7 +28,7 @@ local function worker(format, warg)
     local soon   = today + 24 * 3600 * 3 -- 3 days ahead is close
     local future = today + 24 * 3600 * 7 -- 7 days ahead is maximum
 
-    -- Initialise counters
+    -- Initialize counters
     local count = { past = 0, today = 0, soon = 0, future = 0 }
 
     -- Get data from agenda files

widgets/pkg.lua

@@ -18,7 +18,7 @@ module("vicious.widgets.pkg")
 local function worker(format, warg)
     if not warg then return end
 
-    -- Initialise counters
+    -- Initialize counters
     local updates = 0
     local manager = {
         ["Arch"]   = { cmd = "pacman -Qu" },

widgets/raid.lua

@@ -19,20 +19,23 @@ local string = {
 module("vicious.widgets.raid")
 
 
+-- Initialize function tables
+local mddev = {}
+
 -- {{{ RAID widget type
 local function worker(format, warg)
     if not warg then return end
-
-    local found = false
-    local mddev = {}
+    if not mddev[warg] then
         mddev[warg] = {
+            ["found"]    = false,
             ["active"]   = 0,
             ["assigned"] = 0
         }
+    end
 
     -- Linux manual page: md(4)
     for line in io.lines("/proc/mdstat") do
-        if found then
+        if mddev[warg]["found"] then
             local updev = string.match(line, "%[[_U]+%]")
 
             for i in string.gmatch(updev, "U") do
@@ -41,7 +44,7 @@ local function worker(format, warg)
 
             break
         elseif string.sub(line, 1, string.len(warg)) == warg then
-            found = true
+            mddev[warg]["found"] = true
 
             for i in string.gmatch(line, "%[%d%]") do
                 mddev[warg]["assigned"] = mddev[warg]["assigned"] + 1

widgets/weather.lua

@@ -17,12 +17,8 @@ local helpers = require("vicious.helpers")
 module("vicious.widgets.weather")
 
 
--- {{{ Weather widget type
-local function worker(format, warg)
-    if not warg then return end
-
-    -- Default values
-    local weather = {
+-- Initialize function tables
+local weather = {
     ["{city}"]    = "N/A",
     ["{wind}"]    = "N/A",
     ["{windmph}"] = "N/A",
@@ -33,7 +29,11 @@ local function worker(format, warg)
     ["{tempc}"]   = "N/A",
     ["{humid}"]   = "N/A",
     ["{press}"]   = "N/A"
-    }
+}
+
+-- {{{ Weather widget type
+local function worker(format, warg)
+    if not warg then return end
 
     -- Get weather forceast by the station ICAO code, from:
     -- * US National Oceanic and Atmospheric Administration

widgets/wifi.lua

@@ -21,19 +21,19 @@ local string = {
 module("vicious.widgets.wifi")
 
 
--- {{{ Wireless widget type
-local function worker(format, warg)
-    if not warg then return end
-
-    -- Default values
-    local winfo = {
+-- Initialize function tables
+local winfo = {
     ["{ssid}"] = "N/A",
     ["{mode}"] = "N/A",
     ["{chan}"] = 0,
     ["{rate}"] = 0,
     ["{link}"] = 0,
     ["{sign}"] = 0
-    }
+}
+
+-- {{{ Wireless widget type
+local function worker(format, warg)
+    if not warg then return end
 
     -- Get data from iwconfig where available
     local iwconfig = "/sbin/iwconfig"