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local modes = {}
--- ModeManager orchestrates resolution toggles and on_enter/on_exit hooks.
local ModeManager = {}
ModeManager.__index = ModeManager
function ModeManager.new(waywall)
return setmetatable({ ww = waywall, active = nil, defs = {} }, ModeManager)
end
--- def: { width, height, on_enter=function(), on_exit=function(), toggle_guard=function()->bool }
function ModeManager:define(name, def)
self.defs[name] = def
end
local function active_res(ww)
local w, h = ww.active_res()
return tonumber(w), tonumber(h)
end
--- Get the mode definition by name, erroring if not found.
--- @param name string
function ModeManager:_get_def(name)
assert(self.defs[name], "No such mode: " .. tostring(name))
return self.defs[name]
end
--- Transition to a mode by name, turning off any previously active mode.
--- If name is nil, turn off any active mode.
--- This does not check toggle_guard.
--- @param name string?
function ModeManager:_transition_to(name)
local function exit_active()
if self.active then
local prev = self:_get_def(self.active)
self.ww.set_resolution(0, 0)
if prev.on_exit then
prev.on_exit()
end
self.active = nil
end
end
local function enter_mode(_name)
if _name then
local new = self:_get_def(_name)
self.ww.set_resolution(new.width, new.height)
if new.on_enter then
new.on_enter()
end
self.active = _name
end
end
if name == nil then
exit_active()
return
end
if name == self.active then
-- already active, do nothing
return
end
exit_active()
enter_mode(name)
end
--- Toggle a mode by name. If it's active, turn it off. If it's inactive, turn it on.
--- If the mode has a toggle_guard and it returns false, do nothing and return false.
--- @param name string
--- @return boolean|nil
function ModeManager:toggle(name)
local ww, def = self.ww, self.defs[name]
if not def then
return
end
if def.toggle_guard and def.toggle_guard() == false then
return false
end
-- local w, h = active_res(ww)
-- if w == def.width and h == def.height then
-- ww.set_resolution(0, 0)
-- if def.on_exit then
-- def.on_exit()
-- end
-- self.active = nil
-- else
-- ww.set_resolution(def.width, def.height)
-- if def.on_enter then
-- def.on_enter()
-- end
-- -- exit previous if different
-- self.active = name
-- end
if name == self.active then
self:_transition_to(nil)
else
self:_transition_to(name)
end
end
modes.ModeManager = ModeManager
return modes
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