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fs: asynchronous
[etc/awesome.git] / widgets / fs.lua
index 3a36bf3b5852d7a6a0733c4863955ff271cfabc4..374d6eba05af0e57557dc6514b629648f40827f3 100644 (file)
 
 --[[
-                                                      
-     Licensed under GNU General Public License v2     
-      * (c) 2013, Luke Bonham                         
-      * (c) 2010, Adrian C.      <anrxc@sysphere.org> 
-      * (c) 2009, Lucas de Vries <lucas@glacicle.com> 
-                                                      
+                                                  
+     Licensed under GNU General Public License v2 
+      * (c) 2013, Luke Bonham                     
+                                                  
 --]]
 
 local helpers      = require("lain.helpers")
 
+local shell        = require("awful.util").shell
 local beautiful    = require("beautiful")
+local focused      = require("awful.screen").focused
 local wibox        = require("wibox")
 local naughty      = require("naughty")
 
-local io           = io
-local pairs        = pairs
-local string       = { match  = string.match,
-                       format = string.format }
+local string       = string
 local tonumber     = tonumber
 
 local setmetatable = setmetatable
 
 -- File system disk space usage
 -- lain.widgets.fs
-local fs = { notification_preset = {} }
-local notification = nil
+local fs = {}
 
-function fs:hide()
-    if notification ~= nil then
-        naughty.destroy(notification)
-        notification = nil
-    end
-end
+-- Unit definitions
+fs.unit = { ["mb"] = 1024, ["gb"] = 1024^2 }
+
+function fs.hide() naughty.destroy(fs.notification) end
 
-function fs:show(t_out)
-    fs:hide()
+function fs.show(seconds, scr)
+    fs.hide()
 
-    local f = io.popen(helpers.scripts_dir .. "dfs")
-    ws = f:read("*all"):gsub("\n*$", "")
-    f:close()
+    local cmd = (fs.options and string.format("dfs %s", fs.options)) or "dfs"
+    local ws = helpers.read_pipe(helpers.scripts_dir .. cmd):gsub("\n*$", "")
 
-    notification = naughty.notify({
-        preset = fs.notification_preset,
-        text = ws,
-       timeout = t_out
+    if fs.followtag then
+        fs.notification_preset.screen = focused()
+    elseif scr then
+        fs.notification_preset.screen = scr
+    end
+
+    fs.notification = naughty.notify({
+        preset      = fs.notification_preset,
+        text        = ws,
+        timeout     = seconds or 5,
     })
 end
 
--- Units definitions
-local unit = { ["mb"] = 1024, ["gb"] = 1024^2 }
-
 local function worker(args)
-    local args      = args or {}
-    local timeout   = args.timeout or 600
-    local partition = args.partition or "/"
-    local settings  = args.settings or function() end
+    local args             = args or {}
+    local timeout          = args.timeout or 600
+    local partition        = args.partition or "/"
+    local showpopup        = args.showpopup or "on"
+    local notify           = args.notify or "on"
+    local settings         = args.settings or function() end
 
-    widget = wibox.widget.textbox('')
+    fs.options             = args.options
+    fs.followtag           = args.followtag or false
+    fs.notification_preset = args.notification_preset or { fg = beautiful.fg_normal }
 
-    helpers.set_map("fs", false)
+    fs.widget = wibox.widget.textbox()
 
-    function update()
-        fs_info = {} 
+    helpers.set_map(partition, false)
 
-        local f = io.popen("LC_ALL=C df -kP")
 
-        for line in f:lines() do -- Match: (size) (used)(avail)(use%) (mount)
-            local s     = string.match(line, "^.-[%s]([%d]+)")
-            local u,a,p = string.match(line, "([%d]+)[%D]+([%d]+)[%D]+([%d]+)%%")
-            local m     = string.match(line, "%%[%s]([%p%w]+)")
+    function update()
+        fs_info, fs_now  = {}, {}
+        helpers.async(string.format("%s -c 'LC_ALL=C df -k --output=target,size,used,avail,pcent'", shell), function(f)
+            for line in string.gmatch(f, "\n[^\n]+") do
+                local m,s,u,a,p = string.match(line, "(/.-%s).-(%d+).-(%d+).-(%d+).-([%d]+)%%")
+                m = m:gsub(" ", "") -- clean target from any whitespace
+
+                fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / fs.unit["mb"])
+                fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / fs.unit["gb"])
+                fs_info[m .. " used_mb"]  = string.format("%.1f", tonumber(u) / fs.unit["mb"])
+                fs_info[m .. " used_gb"]  = string.format("%.1f", tonumber(u) / fs.unit["gb"])
+                fs_info[m .. " used_p"]   = p
+                fs_info[m .. " avail_mb"] = string.format("%.1f", tonumber(a) / fs.unit["mb"])
+                fs_info[m .. " avail_gb"] = string.format("%.1f", tonumber(a) / fs.unit["gb"])
+                fs_info[m .. " avail_p"]  = string.format("%d", 100 - tonumber(p))
+            end
 
-            if u and m then -- Handle 1st line and broken regexp
-                fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / unit["mb"])
-                fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / unit["gb"])
-                fs_info[m .. " used_p"]   = tonumber(p)
-                fs_info[m .. " avail_p"]  = 100 - tonumber(p)
+            fs_now.size_mb      = fs_info[partition .. " size_mb"]  or "N/A"
+            fs_now.size_gb      = fs_info[partition .. " size_gb"]  or "N/A"
+            fs_now.used         = fs_info[partition .. " used_p"]   or "N/A"
+            fs_now.used_mb      = fs_info[partition .. " used_mb"]  or "N/A"
+            fs_now.used_gb      = fs_info[partition .. " used_gb"]  or "N/A"
+            fs_now.available    = fs_info[partition .. " avail_p"]  or "N/A"
+            fs_now.available_mb = fs_info[partition .. " avail_mb"] or "N/A"
+            fs_now.available_gb = fs_info[partition .. " avail_gb"] or "N/A"
+
+            notification_preset = fs.notification_preset
+            widget = fs.widget
+            settings()
+
+            if notify == "on" and fs_now.used >= 99 and not helpers.get_map(partition) then
+                naughty.notify({
+                    title   = "warning",
+                    text    = partition .. " is empty!",
+                    timeout = 8,
+                    fg      = "#000000",
+                    bg      = "#FFFFFF"
+                })
+                helpers.set_map(partition, true)
+            else
+                helpers.set_map(partition, false)
             end
-        end
-
-        f:close()
-
-        -- chosen partition easy stuff
-        -- you can however check whatever partition else
-        used = fs_info[partition .. " used_p"]
-        available = fs_info[partition .. " avail_p"]
-        size_mb = fs_info[partition .. " size_mb"]
-        size_gb = fs_info[partition .. " size_gb"]
-
-        notification_preset = { fg = beautiful.fg_normal }
-
-        settings()
-
-        fs.notification_preset = notification_preset
-
-        if used >= 99 and not helpers.get_map("fs")
-        then
-            naughty.notify({ 
-                title = "warning",
-                text = partition .. " ran out!\nmake some room",
-                timeout = 8,
-                fg = "#000000",
-                bg = "#FFFFFF"
-            })
-            helpers.set_map("fs", true)
-        else
-            helpers.set_map("fs", false)
-        end
+        end)
     end
 
-    helpers.newtimer("fs " .. partition, timeout, update)
-
-    widget:connect_signal('mouse::enter', function () fs:show(0) end)
-    widget:connect_signal('mouse::leave', function () fs:hide() end)
+    if showpopup == "on" then
+       fs.widget:connect_signal('mouse::enter', function () fs.show(0) end)
+       fs.widget:connect_signal('mouse::leave', function () fs.hide() end)
+    end
 
-    output = {
-        widget = widget,
-        show = function(t_out)
-                   update()
-                   fs:show(t_out)
-               end
-    }
+    helpers.newtimer(partition, timeout, update)
 
-    return setmetatable(output, { __index = output.widget })
+    return setmetatable(fs, { __index = fs.widget })
 end
 
 return setmetatable(fs, { __call = function(_, ...) return worker(...) end })