tests: Implement the fake_* screen methods

tests/examples/shims/screen.lua

@@ -4,6 +4,29 @@ local gears_tab = require("gears.table")
 local screen, meta = awesome._shim_fake_class()
 screen._count, screen._deleted = 0, {}
 
+local function compute_workarea(s)
+    local struts = {top=0,bottom=0,left=0,right=0}
+
+    for _, c in ipairs(drawin.get()) do
+        for k,v in pairs(struts) do
+            struts[k] = v + (c:struts()[k] or 0)
+        end
+    end
+
+    for _, c in ipairs(client.get()) do
+        for k,v in pairs(struts) do
+            struts[k] = v + (c:struts()[k] or 0)
+        end
+    end
+
+    return {
+        x      = s.geometry.x      + struts.left,
+        y      = s.geometry.y      + struts.top ,
+        width  = s.geometry.width  - struts.left - struts.right ,
+        height = s.geometry.height - struts.top  - struts.bottom,
+    }
+end
+
 local function create_screen(args)
     local s = gears_obj()
     awesome._forward_class(s, screen)
@@ -28,9 +51,40 @@ local function create_screen(args)
         s:emit_signal("property::geometry", old)
     end
 
-    s.outputs = { ["LVDS1"] = {
-        mm_width  = 0,
-        mm_height = 0,
+    function s.fake_resize(self, x, y, width, height)
+        self._resize {
+            x=x,y=y,width=width,height=height
+        }
+    end
+
+    function s:fake_remove()
+        local i = s.index
+        table.remove(screen, i)
+        screen._deleted[s] = true
+        s:emit_signal("removed")
+        screen[screen[i]] = nil
+        s.valid = false
+    end
+
+    function s:swap(other_s)
+        local s1geo = gears_tab.clone(s.geometry)
+        local s2geo = gears_tab.clone(other_s.geometry)
+
+        s:fake_resize(
+            s2geo.x, s2geo.y, s2geo.width, s2geo.height
+        )
+        other_s:fake_resize(
+            s1geo.x, s1geo.y, s1geo.width, s1geo.height
+        )
+
+        s:emit_signal("swapped",other_s)
+        other_s:emit_signal("swapped",s)
+    end
+
+    s.outputs = { LVDS1 ={
+        name      = "LVDS1",
+        mm_width  = (geo.width /96)*25.4,
+        mm_height = (geo.height/96)*25.4,
     }}
 
     local wa = args.workarea_sides or 10
@@ -46,12 +100,16 @@ local function create_screen(args)
                     height = geo.height,
                 }
             elseif key == "workarea" then
+                if screen._track_workarea then
+                    return compute_workarea(s)
+                else
                     return {
                         x      = (geo.x or 0) + wa  ,
                         y      = (geo.y or 0) + wa  ,
                         width  = geo.width    - 2*wa,
                         height = geo.height   - 2*wa,
                     }
+                end
             else
                 return meta.__index(_, key)
             end
@@ -72,6 +130,8 @@ function screen._add_screen(args)
     screen[#screen+1] = s
     screen[s] = s
     screen._count = screen._count + 1
+
+    return s
 end
 
 function screen._get_extents()
@@ -92,7 +152,18 @@ end
 -- problematic since it can cause invalid screens to be "resurrected".
 local function catch_invalid(_, s)
     -- The CAPI implementation allows `nil`
-    if s == nil or type(s) == "string" then return end
+    if s == nil then return end
+
+    -- Try to get the screens by output name.
+    if type(s) == "string" then
+        for s2 in screen do
+            for out in pairs(s2.outputs or {}) do
+                if out == s then
+                    return s2
+                end
+            end
+        end
+    end
 
     assert(screen ~= s, "Some code tried (and failed) to shadow the global `screen`")
 
@@ -152,11 +223,21 @@ local function iter_scr(_, _, s)
 
     local i = s.index
 
-    if i + 1 < #screen then
+    if i < #screen then
         return screen[i+1], i+1
     end
 end
 
+function screen._areas()
+    return {}
+end
+
+function screen.fake_add(x,y,width,height)
+    return screen._add_screen {
+        x=x,y=y,width=width,height=height
+    }
+end
+
 screen._add_screen {width=320, height=240}
 
 screen._grid_vertical_margin = 10
@@ -164,6 +245,8 @@ screen._grid_horizontal_margin = 10
 
 screen.primary = screen[1]
 
+screen._track_workarea = false
+
 function screen.count()
     return screen._count
 end