413 lines
12 KiB
Lua
413 lines
12 KiB
Lua
local debug = require('cmp.utils.debug')
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local char = require('cmp.utils.char')
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local str = require('cmp.utils.str')
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local pattern = require('cmp.utils.pattern')
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local async = require('cmp.utils.async')
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local keymap = require('cmp.utils.keymap')
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local context = require('cmp.context')
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local source = require('cmp.source')
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local menu = require('cmp.menu')
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local misc = require('cmp.utils.misc')
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local config = require('cmp.config')
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local types = require('cmp.types')
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---@class cmp.Core
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local core = {}
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core.SOURCE_TIMEOUT = 500
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core.THROTTLE_TIME = 80
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---Suspending state.
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core.suspending = false
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core.GHOST_TEXT_NS = vim.api.nvim_create_namespace('cmp:GHOST_TEXT')
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---@type cmp.Menu
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core.menu = menu.new({
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on_select = function(e)
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for _, c in ipairs(config.get().confirmation.get_commit_characters(e:get_commit_characters())) do
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keymap.listen('i', c, core.on_keymap)
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end
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core.ghost_text(e)
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end,
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})
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---Show ghost text if possible
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---@param e cmp.Entry
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core.ghost_text = function(e)
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vim.api.nvim_buf_clear_namespace(0, core.GHOST_TEXT_NS, 0, -1)
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local c = config.get().experimental.ghost_text
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if not c then
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return
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end
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if not e then
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return
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end
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local ctx = context.new()
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if ctx.cursor_after_line ~= '' then
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return
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end
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local diff = ctx.cursor.col - e:get_offset()
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local text = e:get_insert_text()
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if e.completion_item.insertTextFormat == types.lsp.InsertTextFormat.Snippet then
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text = vim.lsp.util.parse_snippet(text)
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end
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text = string.sub(str.oneline(text), diff + 1)
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if #text > 0 then
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vim.api.nvim_buf_set_extmark(ctx.bufnr, core.GHOST_TEXT_NS, ctx.cursor.row - 1, ctx.cursor.col - 1, {
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right_gravity = false,
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virt_text = { { text, c.hl_group or 'Comment' } },
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virt_text_pos = 'overlay',
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hl_mode = 'combine',
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priority = 1,
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})
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end
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end
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---@type table<number, cmp.Source>
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core.sources = {}
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---@type table<string, cmp.Source[]>
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core.sources_by_name = {}
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---@type cmp.Context
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core.context = context.new()
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---Register source
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---@param s cmp.Source
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core.register_source = function(s)
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core.sources[s.id] = s
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if not core.sources_by_name[s.name] then
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core.sources_by_name[s.name] = {}
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end
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table.insert(core.sources_by_name[s.name], s)
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end
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---Unregister source
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---@param source_id string
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core.unregister_source = function(source_id)
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local name = core.sources[source_id].name
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core.sources_by_name[name] = vim.tbl_filter(function(s)
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return s.id ~= source_id
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end, core.sources_by_name[name])
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core.sources[source_id] = nil
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end
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---Get new context
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---@param option cmp.ContextOption
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---@return cmp.Context
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core.get_context = function(option)
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local prev = core.context:clone()
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prev.prev_context = nil
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local ctx = context.new(prev, option)
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core.set_context(ctx)
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return core.context
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end
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---Set new context
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---@param ctx cmp.Context
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core.set_context = function(ctx)
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core.context = ctx
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end
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---Suspend completion
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core.suspend = function()
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core.suspending = true
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return function()
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core.suspending = false
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end
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end
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---Get sources that sorted by priority
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---@param statuses cmp.SourceStatus[]
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---@return cmp.Source[]
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core.get_sources = function(statuses)
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local sources = {}
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for _, c in pairs(config.get().sources) do
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for _, s in ipairs(core.sources_by_name[c.name] or {}) do
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if not statuses or vim.tbl_contains(statuses, s.status) then
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if s:is_available() then
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table.insert(sources, s)
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end
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end
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end
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end
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return sources
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end
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---Keypress handler
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core.on_keymap = function(keys, fallback)
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for key, action in pairs(config.get().mapping) do
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if keymap.equals(key, keys) then
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if type(action) == 'function' then
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action(fallback)
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else
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action.invoke(fallback)
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end
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return
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end
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end
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--Commit character. NOTE: This has a lot of cmp specific implementation to make more user-friendly.
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local chars = keymap.t(keys)
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local e = core.menu:get_selected_entry()
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if e and vim.tbl_contains(config.get().confirmation.get_commit_characters(e:get_commit_characters()), chars) then
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local is_printable = char.is_printable(string.byte(chars, 1))
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core.confirm(e, {
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behavior = is_printable and 'insert' or 'replace',
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}, function()
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local ctx = core.get_context()
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local word = e:get_word()
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if string.sub(ctx.cursor_before_line, -#word, ctx.cursor.col - 1) == word and is_printable then
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fallback()
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else
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core.reset()
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end
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end)
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return
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end
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fallback()
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end
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---Prepare completion
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core.prepare = function()
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for keys, action in pairs(config.get().mapping) do
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if type(action) == 'function' then
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action = {
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modes = { 'i' },
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action = action,
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}
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end
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for _, mode in ipairs(action.modes) do
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keymap.listen(mode, keys, core.on_keymap)
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end
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end
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end
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---Check auto-completion
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core.on_change = function(event)
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if core.suspending then
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return
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end
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core.autoindent(event, function()
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local ctx = core.get_context({ reason = types.cmp.ContextReason.Auto })
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-- Skip autocompletion when the item is selected manually.
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if ctx.pumvisible and not vim.tbl_isempty(vim.v.completed_item) then
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return
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end
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debug.log(('ctx: `%s`'):format(ctx.cursor_before_line))
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if ctx:changed(ctx.prev_context) then
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debug.log('changed')
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core.menu:restore(ctx)
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core.ghost_text(core.menu:get_first_entry())
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if vim.tbl_contains(config.get().completion.autocomplete or {}, event) then
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core.complete(ctx)
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else
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core.filter.timeout = core.THROTTLE_TIME
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core.filter()
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end
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else
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debug.log('unchanged')
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end
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end)
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end
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---Check autoindent
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---@param event cmp.TriggerEvent
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---@param callback function
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core.autoindent = function(event, callback)
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if event == types.cmp.TriggerEvent.TextChanged then
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local ctx = context.new()
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local prefix = pattern.matchstr('[^[:blank:]]\\+$', ctx.cursor_before_line)
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if prefix then
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for _, key in ipairs(vim.split(vim.bo.indentkeys, ',')) do
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if vim.tbl_contains({ '=' .. prefix, '0=' .. prefix }, key) then
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return keymap.feedkeys(keymap.t('<Plug>(cmp-autoindent)'), '', callback)
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end
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end
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end
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end
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callback()
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end
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---Invoke completion
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---@param ctx cmp.Context
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core.complete = function(ctx)
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if ctx:invalid() then
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return
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end
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core.set_context(ctx)
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local callback = function()
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local new = context.new(ctx)
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if new:changed(new.prev_context) and ctx == core.context then
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core.complete(new)
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else
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core.filter.timeout = core.THROTTLE_TIME
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core.filter()
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end
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end
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for _, s in ipairs(core.get_sources({ source.SourceStatus.WAITING, source.SourceStatus.COMPLETED })) do
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s:complete(ctx, callback)
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end
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core.filter.timeout = ctx.pumvisible and core.THROTTLE_TIME or 0
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core.filter()
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end
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---Update completion menu
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core.filter = async.throttle(function()
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local ctx = core.get_context()
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if ctx:invalid() then
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return
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end
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-- To wait for processing source for that's timeout.
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local sources = {}
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for _, s in ipairs(core.get_sources({ source.SourceStatus.FETCHING, source.SourceStatus.COMPLETED })) do
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local time = core.SOURCE_TIMEOUT - s:get_fetching_time()
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if not s.incomplete and time > 0 then
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if #sources == 0 then
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core.filter.stop()
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core.filter.timeout = time + 1
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core.filter()
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return
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end
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break
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end
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table.insert(sources, s)
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end
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core.menu:update(ctx, sources)
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core.ghost_text(core.menu:get_first_entry())
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end, core.THROTTLE_TIME)
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---Confirm completion.
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---@param e cmp.Entry
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---@param option cmp.ConfirmOption
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---@param callback function
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core.confirm = function(e, option, callback)
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if not (e and not e.confirmed) then
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return
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end
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e.confirmed = true
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debug.log('entry.confirm', e:get_completion_item())
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local suspending = core.suspend()
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local ctx = core.get_context()
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-- Simulate `<C-y>` behavior.
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local confirm = {}
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table.insert(confirm, keymap.t(string.rep('<C-g>U<Left><Del>', ctx.cursor.character - misc.to_utfindex(e.context.cursor_before_line, e:get_offset()))))
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table.insert(confirm, e:get_word())
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keymap.feedkeys(table.concat(confirm, ''), 'nt', function()
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-- Restore to the requested state.
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local restore = {}
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table.insert(restore, keymap.t(string.rep('<C-g>U<Left><Del>', vim.fn.strchars(e:get_word()))))
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table.insert(restore, string.sub(e.context.cursor_before_line, e:get_offset()))
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keymap.feedkeys(table.concat(restore, ''), 'n', function()
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--@see https://github.com/microsoft/vscode/blob/main/src/vs/editor/contrib/suggest/suggestController.ts#L334
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if #(misc.safe(e:get_completion_item().additionalTextEdits) or {}) == 0 then
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local pre = context.new()
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e:resolve(function()
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local new = context.new()
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local text_edits = misc.safe(e:get_completion_item().additionalTextEdits) or {}
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if #text_edits == 0 then
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return
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end
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local has_cursor_line_text_edit = (function()
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local minrow = math.min(pre.cursor.row, new.cursor.row)
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local maxrow = math.max(pre.cursor.row, new.cursor.row)
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for _, te in ipairs(text_edits) do
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local srow = te.range.start.line + 1
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local erow = te.range['end'].line + 1
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if srow <= minrow and maxrow <= erow then
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return true
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end
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end
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return false
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end)()
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if has_cursor_line_text_edit then
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return
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end
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vim.fn['cmp#apply_text_edits'](new.bufnr, text_edits)
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end)
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else
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vim.fn['cmp#apply_text_edits'](ctx.bufnr, e:get_completion_item().additionalTextEdits)
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end
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-- Prepare completion item for confirmation
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local completion_item = misc.copy(e:get_completion_item())
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if not misc.safe(completion_item.textEdit) then
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completion_item.textEdit = {}
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completion_item.textEdit.newText = misc.safe(completion_item.insertText) or completion_item.word or completion_item.label
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end
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local behavior = option.behavior or config.get().confirmation.default_behavior
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if behavior == types.cmp.ConfirmBehavior.Replace then
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completion_item.textEdit.range = e:get_replace_range()
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else
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completion_item.textEdit.range = e:get_insert_range()
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end
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local keys = {}
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if e.context.cursor.character < completion_item.textEdit.range['end'].character then
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table.insert(keys, keymap.t(string.rep('<Del>', completion_item.textEdit.range['end'].character - e.context.cursor.character)))
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end
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if completion_item.textEdit.range.start.character < e.context.cursor.character then
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table.insert(keys, keymap.t(string.rep('<C-g>U<Left><Del>', e.context.cursor.character - completion_item.textEdit.range.start.character)))
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end
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local is_snippet = completion_item.insertTextFormat == types.lsp.InsertTextFormat.Snippet
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if is_snippet then
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table.insert(keys, keymap.t('<C-g>u') .. e:get_word() .. keymap.t('<C-g>u'))
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table.insert(keys, keymap.t(string.rep('<C-g>U<Left><Del>', vim.fn.strchars(e:get_word()))))
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else
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table.insert(keys, keymap.t('<C-g>u') .. completion_item.textEdit.newText .. keymap.t('<C-g>u'))
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end
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keymap.feedkeys(table.concat(keys, ''), 'n', function()
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if is_snippet then
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config.get().snippet.expand({
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body = completion_item.textEdit.newText,
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insert_text_mode = completion_item.insertTextMode,
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})
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end
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e:execute(vim.schedule_wrap(function()
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suspending()
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if config.get().event.on_confirm_done then
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config.get().event.on_confirm_done(e)
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end
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if callback then
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callback()
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end
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end))
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end)
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end)
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end)
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end
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---Reset current completion state
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core.reset = function()
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for _, s in pairs(core.sources) do
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s:reset()
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end
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core.menu:reset()
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core.get_context() -- To prevent new event
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core.ghost_text(nil)
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end
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return core
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