lualine.nvim/lua/lualine/components/special/eval_func_component.lua
shadmansaleh 61ac665774 refactor: separate the child creation and initialization (#81)
- includes modified class implementation from https://github.com/rxi/classic/blob/master/classic.lua
- now base component class is created from classic.
- change to how component classes are created.
  - Don't overwrite new method to initialize a component.
    Overwrite the init method. new is responsible for
    creating class object and calling init on it.
    Unlike previous new overwrite you don't need to create
    the class (table) and return it. Instead you will recive
    the object as self and do required manipulation on that
    just like any most other oop langs. Also don't need to
    return anything from init. init's job is to initialize.
    remember to call classes init before running your operations
    unfortunately lua isn't full fledged oop lang and I don't
    how to automate this.
- changes how super classes are accesed.
  - rename Component._parent -> Component.super
  - methods on super classes now ran through super class instead
    of objects _parent self._parent as that can lead to recursive inf loop.
  See branch, diff, tabs, buffer classes call to init for example
  on pattern.
- All components updated to reflect current logic
- component loader updated to use new initialization procedure.
- updated tests
- updated BREAKING_CHANGES.md
- plus quite a bit of formatting changes in the components
  - comp.method = function(self, ...) -> function M:method(...)
BREAKING_CHANGE
2021-10-11 16:41:19 +06:00

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1.0 KiB
Lua

-- Copyright (c) 2020-2021 shadmansaleh
-- MIT license, see LICENSE for more details.
local M = require('lualine.component'):extend()
function M:update_status()
local component = self.options[1]
local ok, status
if self.options.type == nil then
ok, status = pcall(M.lua_eval, component)
if not ok then
status = M.vim_function(component)
end
else
if self.options.type == 'luae' then
ok, status = pcall(M.lua_eval, component)
if not ok then
status = nil
end
elseif self.options.type == 'vimf' then
status = M.vim_function(component)
end
end
return status
end
function M.lua_eval(code)
local result = loadstring('return ' .. code)()
assert(result, 'String expected got nil')
return tostring(result)
end
function M.vim_function(name)
-- vim function component
local ok, return_val = pcall(vim.api.nvim_call_function, name, {})
if not ok then
return ''
end -- function call failed
ok, return_val = pcall(tostring, return_val)
return ok and return_val or ''
end
return M