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|
--- @class blink.cmp.SignatureWindow
--- @field win blink.cmp.Window
--- @field context? blink.cmp.SignatureHelpContext
---
--- @field open_with_signature_help fun(context: blink.cmp.SignatureHelpContext, signature_help?: lsp.SignatureHelp)
--- @field close fun()
--- @field scroll_up fun(amount: number)
--- @field scroll_down fun(amount: number)
--- @field update_position fun()
local config = require('blink.cmp.config').signature.window
local sources = require('blink.cmp.sources.lib')
local menu = require('blink.cmp.completion.windows.menu')
local signature = {
win = require('blink.cmp.lib.window').new({
min_width = config.min_width,
max_width = config.max_width,
max_height = config.max_height,
border = config.border,
winblend = config.winblend,
winhighlight = config.winhighlight,
scrollbar = config.scrollbar,
wrap = true,
filetype = 'blink-cmp-signature',
}),
context = nil,
}
-- todo: deduplicate this
menu.position_update_emitter:on(function() signature.update_position() end)
vim.api.nvim_create_autocmd({ 'CursorMovedI', 'WinScrolled', 'WinResized' }, {
callback = function()
if signature.context then signature.update_position() end
end,
})
--- @param context blink.cmp.SignatureHelpContext
--- @param signature_help lsp.SignatureHelp | nil
function signature.open_with_signature_help(context, signature_help)
signature.context = context
-- check if there are any signatures in signature_help, since
-- convert_signature_help_to_markdown_lines errors with no signatures
if
signature_help == nil
or #signature_help.signatures == 0
or signature_help.signatures[(signature_help.activeSignature or 0) + 1] == nil
then
signature.win:close()
return
end
local active_signature = signature_help.signatures[(signature_help.activeSignature or 0) + 1]
local labels = vim.tbl_map(function(signature) return signature.label end, signature_help.signatures)
if signature.shown_signature ~= active_signature then
require('blink.cmp.lib.window.docs').render_detail_and_documentation({
bufnr = signature.win:get_buf(),
detail = labels,
documentation = active_signature.documentation,
max_width = config.max_width,
use_treesitter_highlighting = config.treesitter_highlighting,
})
end
signature.shown_signature = active_signature
-- highlight active parameter
local _, active_highlight = vim.lsp.util.convert_signature_help_to_markdown_lines(
signature_help,
vim.bo.filetype,
sources.get_signature_help_trigger_characters().trigger_characters
)
if active_highlight ~= nil then
-- TODO: nvim 0.11+ returns the start and end line which we should use
local start_region = vim.fn.has('nvim-0.11.0') == 1 and active_highlight[2] or active_highlight[1]
local end_region = vim.fn.has('nvim-0.11.0') == 1 and active_highlight[4] or active_highlight[2]
vim.api.nvim_buf_add_highlight(
signature.win:get_buf(),
require('blink.cmp.config').appearance.highlight_ns,
'BlinkCmpSignatureHelpActiveParameter',
0,
start_region,
end_region
)
end
signature.win:open()
signature.update_position()
end
function signature.close()
if not signature.win:is_open() then return end
signature.win:close()
end
function signature.scroll_up(amount)
local winnr = signature.win:get_win()
local top_line = math.max(1, vim.fn.line('w0', winnr) - 1)
local desired_line = math.max(1, top_line - amount)
vim.api.nvim_win_set_cursor(signature.win:get_win(), { desired_line, 0 })
end
function signature.scroll_down(amount)
local winnr = signature.win:get_win()
local line_count = vim.api.nvim_buf_line_count(signature.win:get_buf())
local bottom_line = math.max(1, vim.fn.line('w$', winnr) + 1)
local desired_line = math.min(line_count, bottom_line + amount)
vim.api.nvim_win_set_cursor(signature.win:get_win(), { desired_line, 0 })
end
function signature.update_position()
local win = signature.win
if not win:is_open() then return end
local winnr = win:get_win()
win:update_size()
local direction_priority = config.direction_priority
-- if the menu window is open, we want to place the signature window on the opposite side
local menu_win_config = menu.win:get_win() and vim.api.nvim_win_get_config(menu.win:get_win())
if menu.win:is_open() then
local cursor_screen_row = vim.fn.winline()
local menu_win_is_up = menu_win_config.row - cursor_screen_row < 0
direction_priority = menu_win_is_up and { 's' } or { 'n' }
end
local pos = win:get_vertical_direction_and_height(direction_priority)
-- couldn't find anywhere to place the window
if not pos then
win:close()
return
end
-- set height
vim.api.nvim_win_set_height(winnr, pos.height)
local height = win:get_height()
-- default to the user's preference but attempt to use the other options
if menu_win_config then
assert(menu_win_config.relative == 'win', 'The menu window must be relative to a window')
local cursor_screen_row = vim.fn.winline()
local menu_win_is_up = menu_win_config.row - cursor_screen_row < 0
vim.api.nvim_win_set_config(winnr, {
relative = menu_win_config.relative,
win = menu_win_config.win,
row = menu_win_is_up and menu_win_config.row + menu.win:get_height() + 1 or menu_win_config.row - height - 1,
col = menu_win_config.col,
})
else
vim.api.nvim_win_set_config(winnr, { relative = 'cursor', row = pos.direction == 's' and 1 or -height, col = 0 })
end
end
return signature
|
