tags: rework how tags are defined

Instead of using a list of names and a list of layouts, we use an
array with optional names and layouts and additional properties. If no
name is given, only numerical ID is used. Default to first
layout. Additional properties are set using `setproperty`.

rc.lua

@@ -40,6 +40,15 @@ config.layouts = {
    awful.layout.suit.fair,
    awful.layout.suit.floating,
 }
+config.tags = { 
+   { layout = awful.layout.suit.fair }, -- 1
+   { name = "emacs", mwfact = 0.6 },
+   { name = "www", mwfact = 0.7 },
+   { name = "im" , mwfact = 0.2 },
+   { }, -- 5
+   { }, -- 6
+   { }, -- 7
+}
 config.hostname = awful.util.pread('uname -n'):gsub('\n', '')
 
 -- Remaining modules

rc/tags.lua

@@ -2,17 +2,18 @@
 
 loadrc("sharetags")
 
-local tags = { names = { 1, "emacs", "www", "im", 5, 6, 7 },
+local otags = config.tags
-	       layout = { awful.layout.suit.tile,
-			  awful.layout.suit.tile,
-			  awful.layout.suit.tile,
-			  awful.layout.suit.tile,
-			  awful.layout.suit.tile,
-			  awful.layout.suit.tile,
-			  awful.layout.suit.tile }}
-tags = sharetags.create_tags(tags.names, tags.layout)
 config.tags = {}
 
+local names = {}
+local layouts = {}
+for i, v in ipairs(otags) do
+   names[i] = v.name or i
+   layouts[i] = v.layout or config.layouts[1]
+end
+
+tags = sharetags.create_tags(names, layouts)
+
 -- Compute the maximum number of digit we need, limited to 9
 keynumber = math.min(9, #tags)
 
@@ -20,10 +21,20 @@ keynumber = math.min(9, #tags)
 -- Be careful: we use keycodes to make it works on any keyboard layout.
 -- This should map on the top row of your keyboard, usually 1 to 9.
 for i = 1, #tags do
+   -- Name
    config.tags[tags[i].name] = tags[i]
    if tags[i].name ~= tostring(i) then
       tags[i].name = tostring(i) .. "↭" .. tags[i].name
    end
+
+   -- Properties
+   for pname, pvalue in pairs(otags[i]) do
+      if pname ~= "name" and pname ~= "layout" then
+	 awful.tag.setproperty(tags[i], pname, pvalue)
+      end
+   end
+
+   -- Key bindings
    if i <= keynumber then
       config.keys.global = awful.util.table.join(
 	 config.keys.global,
@@ -71,7 +82,3 @@ for i = 1, #tags do
 		   end))
    end
 end
-
-awful.tag.setproperty(config.tags.emacs, "mwfact", 0.6)
-awful.tag.setproperty(config.tags.www, "mwfact", 0.7)
-awful.tag.setproperty(config.tags.im, "mwfact", 0.2)