lite/data/core/command.lua

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2019-12-28 12:16:32 +01:00
local core = require "core"
local command = {}
command.map = {}
local always_true = function() return true end
function command.add(predicate, map)
predicate = predicate or always_true
if type(predicate) == "string" then
predicate = require(predicate)
end
if type(predicate) == "table" then
local class = predicate
predicate = function() return core.active_view:is(class) end
end
for name, fn in pairs(map) do
assert(not command.map[name], "command already exists: " .. name)
command.map[name] = { predicate = predicate, perform = fn }
end
end
local function capitalize_first(str)
return str:sub(1, 1):upper() .. str:sub(2)
end
function command.prettify_name(name)
return name:gsub(":", ": "):gsub("-", " "):gsub("%S+", capitalize_first)
end
function command.get_all_valid()
local res = {}
for name, cmd in pairs(command.map) do
if cmd.predicate() then
table.insert(res, name)
end
end
return res
end
local function perform(name)
local cmd = command.map[name]
if cmd and cmd.predicate() then
cmd.perform()
return true
end
return false
end
function command.perform(...)
local ok, res = core.try(perform, ...)
return not ok or res
end
function command.add_defaults()
local reg = { "core", "root", "command", "doc", "findreplace" }
for _, name in ipairs(reg) do
require("core.commands." .. name)
end
end
return command