create task widget template, based on calendar widget

widgets/task.lua

@@ -0,0 +1,126 @@
+
+--[[
+                                                  
+     Licensed under GNU General Public License v2 
+      * (c) 2013, Jan Xie
+                                                  
+--]]
+
+local icons_dir    = require("lain.helpers").icons_dir
+
+local awful        = require("awful")
+local beautiful    = require("beautiful")
+local naughty      = require("naughty")
+
+local io           = io
+local os           = { date = os.date }
+local tonumber     = tonumber
+
+local setmetatable = setmetatable
+
+-- task notification
+-- lain.widgets.task
+local task = {}
+local task_notification = nil
+
+function task:hide()
+    if task_notification ~= nil then
+        naughty.destroy(task_notification)
+        task_notification = nil
+    end
+end
+
+function task:show(t_out, inc_offset)
+    task:hide()
+
+    local offs = inc_offset or 0
+    local tims = t_out or 0
+    local f, c_text
+    local today = tonumber(os.date('%d'))
+    local init_t = '/usr/bin/cal | sed -r -e "s/(^| )( '
+    -- let's take font only, font size is set in task table
+    local font = beautiful.font:sub(beautiful.font:find(""),
+                 beautiful.font:find(" "))
+
+    if offs == 0
+    then -- current month showing, today highlighted
+        if today >= 10
+        then
+           init_t = '/usr/bin/cal | sed -r -e "s/(^| )('
+        end
+
+        task.offset = 0
+        task.notify_icon = task.icons .. today .. ".png"
+
+        -- bg and fg inverted to highlight today
+        f = io.popen( init_t .. today ..
+                      ')($| )/\\1<b><span foreground=\\"'
+                      .. task.bg ..
+                      '\\" background=\\"'
+                      .. task.fg ..
+                      '\\">\\2<\\/span><\\/b>\\3/"' )
+
+    else -- no current month showing, no day to highlight
+       local month = tonumber(os.date('%m'))
+       local year = tonumber(os.date('%Y'))
+
+       task.offset = task.offset + offs
+       month = month + task.offset
+
+       if month > 12 then
+           month = month % 12
+           year = year + 1
+           if month <= 0 then
+               month = 12
+           end
+       elseif month < 1 then
+           month = month + 12
+           year = year - 1
+           if month <= 0 then
+               month = 1
+           end
+       end
+
+       task.notify_icon = nil
+
+       f = io.popen('/usr/bin/cal ' .. month .. ' ' .. year)
+    end
+
+
+    --c_text = "<tt><span font='" .. font .. " "
+             --.. task.font_size .. "'><b>"
+             --.. f:read() .. "</b>\n\n"
+             --.. f:read() .. "\n"
+             --.. f:read("*all"):gsub("\n*$", "")
+             --.. "</span></tt>"
+    c_text = "hello tasks!"
+    f:close()
+
+    task_notification = naughty.notify({ text = c_text,
+                                        icon = task.notify_icon,
+                                        position = task.position,
+                                        fg = task.fg,
+                                        bg = task.bg,
+                                        timeout = tims })
+end
+
+function task:attach(widget, args)
+    local args = args or {}
+    task.icons = args.icons or icons_dir .. "cal/white/"
+    task.font_size = tonumber(args.font_size) or 12
+    task.fg = args.fg or beautiful.fg_normal or "#FFFFFF"
+    task.bg = args.bg or beautiful.bg_normal or "#FFFFFF"
+    task.position = args.position or "top_right"
+
+    task.offset = 0
+    task.notify_icon = nil
+
+    widget:connect_signal("mouse::enter", function () task:show() end)
+    widget:connect_signal("mouse::leave", function () task:hide() end)
+    widget:buttons(awful.util.table.join( awful.button({ }, 1, function ()
+                                              task:show(0, -1) end),
+                                          awful.button({ }, 3, function ()
+                                              task:show(0, 1) end) ))
+end
+
+return setmetatable(task, { __call = function(_, ...) return create(...) end })