make useless_gap usage more friendly; minor fix

README.md

@@ -138,10 +138,9 @@ To differentiate tags with the same name, you may need a more advanced naming fu
 
 ## Caveats
 
-`beautiful.useless_gap` is handled differently in layout-machi and it doesn't cooperate well with the standard way.
-In my usage I set `gap = 0` for the tags and let machi handle the gaps.
+1. layout-machi handles `beautiful.useless_gap` slightly differently.
 
-Also, true transparency is required. Otherwise switcher and editor will block the clients.
+2. True transparency is required. Otherwise switcher and editor will block the clients.
 
 ## TODO
 

editor.lua

@@ -458,8 +458,8 @@ local function create(data)
    end
 
    local function start_interactive(screen, layout)
-      local outer_gap = data.outer_gap or data.gap or api.beautiful.useless_gap or 0
-      local inner_gap = data.inner_gap or data.gap or api.beautiful.useless_gap or 0
+      local outer_gap = data.outer_gap or data.gap or api.beautiful.useless_gap * 2 or 0
+      local inner_gap = data.inner_gap or data.gap or api.beautiful.useless_gap * 2 or 0
       local label_font_family = api.beautiful.get_font(
          api.beautiful.mono_font or api.beautiful.font):get_family()
       local label_size = api.dpi(30)
@@ -718,8 +718,8 @@ local function create(data)
    end
 
    local function run_cmd(init_area, cmd)
-      local outer_gap = data.outer_gap or data.gap or api.beautiful.useless_gap or 0
-      local inner_gap = data.inner_gap or data.gap or api.beautiful.useless_gap or 0
+      local outer_gap = data.outer_gap or data.gap or api.beautiful.useless_gap * 2 or 0
+      local inner_gap = data.inner_gap or data.gap or api.beautiful.useless_gap * 2 or 0
       init(init_area)
       push_history()
 

layout.lua

@@ -85,7 +85,8 @@ local function create(name, editor)
    end
 
    local function arrange(p)
-      local wa = p.workarea
+      local useless_gap = p.useless_gap
+      local wa = get_screen(p.screen).workarea -- get the real workarea without the gap (instead of p.workarea)
       local cls = p.clients
       local regions = get_regions(wa, get_screen(p.screen).selected_tag)
 
@@ -104,11 +105,13 @@ local function create(name, editor)
             end
             local region = c.machi_region
 
+            -- Editor already handled useless_gap in the stored regions.
+            -- We try to negate the gap of outer layer.
             p.geometries[c] = {
-               x = regions[region].x,
-               y = regions[region].y,
-               width = regions[region].width,
-               height = regions[region].height,
+               x = regions[region].x - useless_gap,
+               y = regions[region].y - useless_gap,
+               width = regions[region].width + useless_gap * 2,
+               height = regions[region].height + useless_gap * 2,
             }
 
             print("Put client " .. tostring(c) .. " to region " .. region)
@@ -146,8 +149,8 @@ local function create(name, editor)
          c.machi_region = choice
          c.x = regions[choice].x
          c.y = regions[choice].y
-         c.width = regions[choice].width
-         c.height = regions[choice].height
+         c.width = max(1, regions[choice].width - 2 * border_width)
+         c.height = max(1, regions[choice].height - 2 * border_width)
       end
    end