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local action_facade = require("clever_f.action_facade")
local capabilities = require("clever_f.capabilities")
local feedback_service = require("clever_f.feedback_service")
local policy = require("clever_f.policy")
local sequence_coordinator = require("clever_f.sequence_coordinator")
local sequence_state = require("clever_f.sequence_state")
local state_transitions = require("clever_f.state_transitions")
local M = {}
local CompositionRoot = {}
CompositionRoot.__index = CompositionRoot
M.CompositionRoot = CompositionRoot
M.ACTION_NAMES = {
"StartFindForward",
"StartFindBackward",
"StartTillForward",
"StartTillBackward",
"Reset",
"RepeatSameDirection",
"RepeatOppositeDirection",
}
M.DEFAULT_MAPPING_MODES = { "n", "x", "o" }
M.DEFAULT_MAPPINGS = {
{ lhs = "f", action = "StartFindForward" },
{ lhs = "F", action = "StartFindBackward" },
{ lhs = "t", action = "StartTillForward" },
{ lhs = "T", action = "StartTillBackward" },
}
local ACTION_INVOCATIONS = {
StartFindForward = function(facade)
return facade:start_find_forward()
end,
StartFindBackward = function(facade)
return facade:start_find_backward()
end,
StartTillForward = function(facade)
return facade:start_till_forward()
end,
StartTillBackward = function(facade)
return facade:start_till_backward()
end,
Reset = function(facade)
return facade:reset()
end,
RepeatSameDirection = function(facade)
return facade:repeat_same_direction()
end,
RepeatOppositeDirection = function(facade)
return facade:repeat_opposite_direction()
end,
}
local root_records = setmetatable({}, { __mode = "k" })
local function fail(message, level)
error(message, (level or 1) + 1)
end
local function normalize_options(options)
if type(options) ~= "table" then
fail("CompositionRoot options must be a table", 3)
end
if options.host == nil then
return { host = options }
end
return options
end
function CompositionRoot.new(options)
if CompositionRoot.is(options) then
return options
end
options = normalize_options(options)
local host = capabilities.assert_implements(options.host)
local state = sequence_state.new()
local transitions = options.transitions
or options.state_transitions
or state_transitions.new(state)
local policy_service = options.policy
or options.policy_service
or policy.new(host)
local feedback = options.feedback
or options.feedback_service
or feedback_service.new({
host = host,
state = state,
transitions = transitions,
policy = policy_service,
})
local coordinator = options.coordinator
or options.sequence_coordinator
or sequence_coordinator.new({
host = host,
state = state,
transitions = transitions,
policy = policy_service,
feedback = feedback,
})
local facade = options.facade
or options.action_facade
or action_facade.new({ coordinator = coordinator })
local root = setmetatable({}, CompositionRoot)
root_records[root] = {
host = host,
state = state,
transitions = transitions,
policy = policy_service,
feedback = feedback,
coordinator = coordinator,
facade = facade,
activation = nil,
last_highlight_refresh = nil,
}
return root
end
function CompositionRoot.is(value)
return type(value) == "table" and root_records[value] ~= nil
end
local function register_logical_actions(record)
local registrations = {}
for _, name in ipairs(M.ACTION_NAMES) do
local invoke = ACTION_INVOCATIONS[name]
registrations[name] = record.host:register_action(name, function(...)
return invoke(record.facade, ...)
end)
end
return registrations
end
local function register_default_mappings(record, setup)
local registrations = {}
if not setup.install_default_mappings then
return registrations
end
for _, mapping in ipairs(M.DEFAULT_MAPPINGS) do
registrations[mapping.lhs] = record.host:register_mapping(
M.DEFAULT_MAPPING_MODES,
mapping.lhs,
mapping.action,
{}
)
end
return registrations
end
function CompositionRoot:activate()
local record = root_records[self]
if record.activation == nil then
local setup = record.policy:capture_activation()
local feedback_activation = record.feedback:activate()
local highlights = record.feedback:evaluate_highlights()
local colorscheme_registration = record.host:register_events(
"ColorScheme",
function()
record.last_highlight_refresh = record.feedback:evaluate_highlights()
end,
{ owner = "clever_f", lifecycle = "colorscheme" }
)
local actions = register_logical_actions(record)
record.activation = {
state = record.state,
setup = setup,
feedback = feedback_activation,
highlights = highlights,
colorscheme_registration = colorscheme_registration,
actions = actions,
mappings = register_default_mappings(record, setup),
}
end
return record.activation
end
function CompositionRoot:last_highlight_refresh()
return root_records[self].last_highlight_refresh
end
function CompositionRoot:host()
return root_records[self].host
end
function CompositionRoot:state()
return root_records[self].state
end
function CompositionRoot:transitions()
return root_records[self].transitions
end
function CompositionRoot:policy()
return root_records[self].policy
end
function CompositionRoot:feedback()
return root_records[self].feedback
end
function CompositionRoot:coordinator()
return root_records[self].coordinator
end
function CompositionRoot:facade()
return root_records[self].facade
end
function CompositionRoot:invoke_descriptor(value)
return self:facade():invoke_descriptor(value)
end
function M.new(options)
return CompositionRoot.new(options)
end
setmetatable(M, {
__call = function(_, options)
return CompositionRoot.new(options)
end,
})
return M
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