Allow resizing windows with parent traversal.

README.md

@@ -310,8 +310,8 @@ Calling `machi.switcher.start()` will create a switcher supporting the following
  - `Shift` + arrow keys: move the focused window to other areas by the direction. In draft mode, move the window while preserving its size.
  - `Control`[ + `Shift`] + arrow keys: move the bottom-right (or top-left window if `Shift` is pressed) area of the focused window by direction. Only works in draft mode.
  - `Tab`: switch beteen windows covering the current areas.
- - `q` or `PageUp` (`Prior`): select the parent of the current area.
+ - `q` or `PageUp` (`Prior`): select the parent of the current area. Hold `Control` to resize the current window accordingly.
- - `e` or `PageDown` (`Next`): select the previous child of the current area, if `q` or `PageUp` was used.
+ - `e` or `PageDown` (`Next`): select the previous child of the current area, if `q` or `PageUp` was used. Hold `Control` to resize the current window accordingly.
  - `f` or `.`: toggle the per-window setting of draft mode.
  - `/`: open the editor to edit the selected area using the same command interpretation.
    Note the final command may be transcoded to be embeddable, but the areas shall be the same.

switcher.lua

@@ -304,6 +304,14 @@ function module.start(c, exit_keys)
         maintain_tablist()
         assert(tablist ~= nil)
 
+        local shift = false
+        local ctrl = false
+        for i, m in ipairs(mod) do
+            if m == "Shift" then shift = true
+            elseif m == "Control" then ctrl = true
+            end
+        end
+
         if key == "Tab" then
             if #tablist > 0 then
                 tablist_index = tablist_index % #tablist + 1
@@ -314,14 +322,6 @@ function module.start(c, exit_keys)
                 infobox.bgimage = draw_info
             end
         elseif key == "Up" or key == "Down" or key == "Left" or key == "Right" then
-            local shift = false
-            local ctrl = false
-            for i, m in ipairs(mod) do
-                if m == "Shift" then shift = true
-                elseif m == "Control" then ctrl = true
-                end
-            end
-
             local current_area = selected_area()
 
             if c and (shift or ctrl) then
@@ -496,23 +496,48 @@ function module.start(c, exit_keys)
             end
         elseif (key == "q" or key == "Prior") then
             local current_area = selected_area()
-            if areas[current_area].parent_id then
+            if areas[current_area].parent_id == nil then
-                tablist = nil
+                return
-                set_selected_area(areas[current_area].parent_id)
-                if #parent_stack == 0 or
-                    parent_stack[#parent_stack] ~= current_area then
-                    parent_stack = {current_area}
-                end
-                parent_stack[#parent_stack + 1] = areas[current_area].parent_id
-                infobox.bgimage = draw_info
             end
+
+            tablist = nil
+            set_selected_area(areas[current_area].parent_id)
+            if #parent_stack == 0 or
+                parent_stack[#parent_stack] ~= current_area then
+                parent_stack = {current_area}
+            end
+            parent_stack[#parent_stack + 1] = areas[current_area].parent_id
+            current_area = parent_stack[#parent_stack]
+
+            if c and ctrl and cd[c].draft ~= false then
+                if cd[c].area then
+                    cd[c].lu, cd[c].rd, cd[c].area = cd[c].area, cd[c].area, nil
+                end
+                machi.layout.set_geometry(c, areas[current_area], areas[current_area], 0, c.border_width)
+                awful.layout.arrange(screen)
+            end
+
+            infobox.bgimage = draw_info
         elseif (key =="e" or key == "Next") then
             local current_area = selected_area()
-            if #parent_stack > 1 and parent_stack[#parent_stack] == current_area then
+            if #parent_stack <= 1 or parent_stack[#parent_stack] ~= current_area then
-                set_selected_area(parent_stack[#parent_stack - 1])
+                return
-                table.remove(parent_stack, #parent_stack)
-                infobox.bgimage = draw_info
             end
+
+            tablist = nil
+            set_selected_area(parent_stack[#parent_stack - 1])
+            table.remove(parent_stack, #parent_stack)
+            current_area = parent_stack[#parent_stack]
+
+            if c and ctrl then
+                if not areas[current_area].inhabitable and cd[c].draft ~= true then
+                    cd[c].lu, cd[c].rd, cd[c].area = nil, nil, current_area
+                end
+                machi.layout.set_geometry(c, areas[current_area], areas[current_area], 0, c.border_width)
+                awful.layout.arrange(screen)
+            end
+
+            infobox.bgimage = draw_info
         elseif key == "/" then
             local current_area = selected_area()
             local original_cmd = machi.engine.areas_to_command(areas, true, current_area)