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local config = require('blink.cmp.config')
local completion = {}
function completion.setup()
-- trigger controls when to show the window and the current context for caching
local trigger = require('blink.cmp.completion.trigger')
trigger.activate()
-- sources fetch completion items and documentation
local sources = require('blink.cmp.sources.lib')
-- manages the completion list state:
-- fuzzy matching items
-- when to show/hide the windows
-- selection
-- accepting and previewing items
local list = require('blink.cmp.completion.list')
-- trigger -> sources: request completion items from the sources on show
trigger.show_emitter:on(function(event) sources.request_completions(event.context) end)
trigger.hide_emitter:on(function()
sources.cancel_completions()
list.hide()
end)
-- sources -> list
sources.completions_emitter:on(function(event)
-- schedule for later to avoid adding 0.5-4ms to insertion latency
vim.schedule(function()
-- since this was performed asynchronously, we check if the context has changed
if trigger.context == nil or event.context.id ~= trigger.context.id then return end
-- don't show the list if prefetching results
if event.context.trigger.kind == 'prefetch' then return end
-- don't show if all the sources that defined the trigger character returned no items
if event.context.trigger.character ~= nil then
local triggering_source_returned_items = false
for _, source in pairs(event.context.providers) do
local trigger_characters = sources.get_provider_by_id(source):get_trigger_characters()
if
event.items[source]
and #event.items[source] > 0
and vim.tbl_contains(trigger_characters, trigger.context.trigger.character)
then
triggering_source_returned_items = true
break
end
end
if not triggering_source_returned_items then return list.hide() end
end
list.show(event.context, event.items)
end)
end)
--- list -> windows: ghost text and completion menu
-- setup completion menu
if config.completion.menu.enabled then
list.show_emitter:on(
function(event) require('blink.cmp.completion.windows.menu').open_with_items(event.context, event.items) end
)
list.hide_emitter:on(function() require('blink.cmp.completion.windows.menu').close() end)
list.select_emitter:on(function(event)
require('blink.cmp.completion.windows.menu').set_selected_item_idx(event.idx)
require('blink.cmp.completion.windows.documentation').auto_show_item(event.context, event.item)
end)
end
-- setup ghost text
if config.completion.ghost_text.enabled then
list.select_emitter:on(
function(event) require('blink.cmp.completion.windows.ghost_text').show_preview(event.item) end
)
list.hide_emitter:on(function() require('blink.cmp.completion.windows.ghost_text').clear_preview() end)
end
-- run 'resolve' on the item ahead of time to avoid delays
-- when accepting the item or showing documentation
list.select_emitter:on(function(event)
-- when selection.preselect == false, we still want to prefetch the first item
local item = event.item or list.items[1]
if item == nil then return end
require('blink.cmp.completion.prefetch')(event.context, event.item)
end)
end
return completion
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