Module: Rvim::Lua::Vars

Defined in:
lib/rvim/lua/vars.rb

Overview

vim.g / vim.b / vim.w / vim.t — variable namespaces.

vim.g.foo = 1 sets a global var (writes through to editor.let_vars). vim.b / vim.w / vim.t target the current buffer / window / tab’s @vars hash. Reads return nil when the key is unset (matching NeoVim).

Class Method Summary collapse

Class Method Details

.install(state, editor, _runtime) ⇒ Object 



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# File 'lib/rvim/lua/vars.rb', line 13

def install(state, editor, _runtime)
  state.function '_rvim_g_set'  do |name, value| editor.let_vars[name.to_s] = value end
  state.function '_rvim_g_get'  do |name| editor.let_vars[name.to_s] end
  state.function '_rvim_b_set'  do |name, value| (editor.current_buffer&.vars || {})[name.to_s] = value end
  state.function '_rvim_b_get'  do |name| editor.current_buffer&.vars&.[](name.to_s) end
  state.function '_rvim_w_set'  do |name, value| (editor.current_window&.vars ||= {})[name.to_s] = value end
  state.function '_rvim_w_get'  do |name| editor.current_window&.vars&.[](name.to_s) end
  state.function '_rvim_t_set'  do |name, value| (editor.current_tab&.vars ||= {})[name.to_s] = value end
  state.function '_rvim_t_get'  do |name| editor.current_tab&.vars&.[](name.to_s) end

  state.eval(<<~LUA)
    local function make_var_table(setter, getter)
      return setmetatable({}, {
        __index = function(_, name) return getter(name) end,
        __newindex = function(_, name, value) setter(name, value) end,
      })
    end

    vim.g = make_var_table(_rvim_g_set, _rvim_g_get)
    vim.b = make_var_table(_rvim_b_set, _rvim_b_get)
    vim.w = make_var_table(_rvim_w_set, _rvim_w_get)
    vim.t = make_var_table(_rvim_t_set, _rvim_t_get)
  LUA
end