resources/scripts/views/view_builder.lua - master - d.vision/division_engine_cpp

resources/scripts/views/view_builder.lua
80 строк2 KB
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Improved annotations
27 ноя 2024, 11:06
27 ноя 2024, 11:060828538
local view = require "views.view"

---@alias view_builder.init_callback fun(state: view_builder.state)
---@alias view_builder.rebuild_callback fun(state: view_builder.state): view

---@class view_builder.options 
---@field init view_builder.init_callback?
---@field builder view_builder.rebuild_callback
---@field destroy fun()?

---@class view_builder: view, view_builder.options
---@overload fun(options: view_builder.options): view_builder
---@diagnostic disable-next-line: assign-type-mismatch
local view_builder = view:inherit 'view_builder'

---@class view_builder.state: view.state
---@field package _view view_builder
---@field package _render_rect rect
---@field package _builder_result_view view
---@field package _builder_result_view_state view.state
view_builder.state = view.state:inherit 'view_builder.state'

---@param options view_builder.options
function view_builder:__call(options)
    assert(options.builder)

    return view_builder:new(options)
end

function view_builder:create_state()
    ---@type view_builder.state
    local state = view_builder.state:new { _view = self }

    if self.init then self.init(state) end

    local result_view = state._view.builder(state)
    state._builder_result_view = result_view
    state._builder_result_view_state = result_view:create_state()

    return state
end

---@package
---@param constraints constraints
---@param view view_builder
function view_builder.state:layout(constraints, view)
    return self._builder_result_view_state:layout(
        constraints,
        self._builder_result_view
    )
end

---@package
---@param render_rect rect
---@param view view_builder
function view_builder.state:render(render_rect, view)
    self._render_rect = render_rect
    self._view = view
    self._builder_result_view_state:render(self._render_rect, self._builder_result_view)
end

function view_builder.state:rebuild()
    local view_result = self._view.builder(self)

    if not view_result:is_same_view_type(self._builder_result_view) then
        self._builder_result_view_state:destroy()
        self._builder_result_view_state = self._builder_result_view:create_state()
    end

    self._builder_result_view = view_result
    self._builder_result_view_state:render(self._render_rect, self._builder_result_view)
end

---@package
function view_builder.state:destroy()
    if self._view.destroy then self._view.destroy() end
    self._builder_result_view_state:destroy()
end

return view_builder