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Signed-off-by: Rainer Bendig <hexathos@mailbox.org>

awesome/widgets/memory/widget.lua

@@ -0,0 +1,85 @@
+-- Alexander Tsepkov, 2015
+--
+-- Memory Monitor for awesome that changes color as the memory usage goes up
+-- dependency: FontAwesome
+
+
+local awful = require("awful")
+local wibox = require("wibox")
+local naughty = require("naughty")
+
+
+local last_id
+widget = wibox.widget.textbox()
+function testmem()
+    local fd = io.popen(os.getenv("HOME") .. "/.config/awesome/widgets/memory/mem.sh simple")
+    if fd then
+        -- occasionally awesome craps out for no reason running the operation
+        -- and fd is nil, do nothing in that case (aside from ignoring the value
+        -- rather than throwing an error), it will fix itself next run
+        local memstr = fd:read("*all")
+        local mem = tonumber(memstr)
+        fd:close()
+        local color
+        local font = "<span font='FontAwesome 8' "
+        if mem > 94 then
+            color = font .. "color='#FF0000'>"
+            last_id = naughty.notify({
+                title = "High Memory Usage",
+                text = "Consider closing some processes to prevent miserable experience.",
+                preset = naughty.config.presets.critical,
+                replaces_id = last_id,
+                icon = os.getenv("HOME") .. "/.config/awesome/widgets/memory/" .. "max.png"
+            }).id
+        elseif mem > 85 then
+            color = font .. "color='#FF8000'>"
+        elseif mem > 75 then
+            color = font .. "color='#F5F549'>"
+        else
+            color = font .. "color='#669900'>"
+        end
+
+        if widget.zenstate ~= nil then
+            if widget.zenstate(mem) then
+                return ""
+            end
+        end
+
+        return color .. "" .. mem .. " </span>"
+    end
+    return "N/A " -- something failed
+end
+
+-- to display on hover event
+local summary = nil
+function show_tooltip()
+    local font = 'monospace 8'
+    local text_color = '#FFFFFF'
+    local fd = io.popen(os.getenv("HOME") .. "/.config/awesome/widgets/memory/mem.sh summary")
+    local str = fd:read("*all")
+    local content = string.format('<span font="%s" foreground="%s">%s</span>', font, text_color, str)
+    summary = naughty.notify({
+--        title = "Memory Usage",
+        text = content,
+        timeout = 0,
+        hover_timeout = 0.5,
+        width = 60*8
+    })
+end
+
+function hide_tooltip()
+    if summary ~= nil then
+        naughty.destroy(summary)
+    end
+end
+
+widget:set_markup(testmem())
+widget:connect_signal("mouse::enter", show_tooltip)
+widget:connect_signal("mouse::leave", hide_tooltip)
+
+-- update every 30 secs
+memtimer = timer({ timeout = 30 })
+memtimer:connect_signal("timeout", function()
+    widget:set_markup(testmem())
+end)
+memtimer:start()