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local M = {}
-- see luasnip/util/types.lua
local types = {
textNode = 1,
insertNode = 2,
functionNode = 3,
snippetNode = 4,
choiceNode = 5,
dynamicNode = 6,
snippet = 7,
exitNode = 8,
restoreNode = 9,
node_types = { 1, 2, 3, 4, 5, 6, 7, 8, 9 },
}
function M.config()
lvim.builtin.luasnip = {
sources = {
friendly_snippets = true,
},
config = {
history = false,
update_events = "InsertLeave",
enable_autosnippets = false,
ext_opts = {
-- Show virtual text to signal when you are inside an sippets
[types.insertNode] = {
active = {
virt_text = { { "<-- snip insert", "BufferInactiveIndex" } },
},
},
-- Helps to notice when you are within a choice node
[types.choiceNode] = {
active = {
virt_text = { { "<-- choice", "BufferInactiveIndex" } },
},
},
},
},
}
end
function M.setup()
local utils = require "lvim.utils"
local paths = {}
if lvim.builtin.luasnip.sources.friendly_snippets then
paths[#paths + 1] = utils.join_paths(get_runtime_dir(), "site", "pack", "packer", "start", "friendly-snippets")
end
local user_snippets = utils.join_paths(get_config_dir(), "snippets")
if utils.is_directory(user_snippets) then
paths[#paths + 1] = user_snippets
end
local luasnip = require "luasnip"
luasnip.config.set_config(lvim.builtin.luasnip.config)
-- When no paths are provided, luasnip will search in the runtimepath
require("luasnip.loaders.from_lua").lazy_load()
require("luasnip.loaders.from_vscode").lazy_load { paths = paths }
require("luasnip.loaders.from_snipmate").lazy_load()
end
---when inside a snippet, seeks to the nearest luasnip field if possible, and checks if it is jumpable
---@param dir number 1 for forward, -1 for backward; defaults to 1
---@return boolean true if a jumpable luasnip field is found while inside a snippet
local function jumpable(dir)
local luasnip_ok, luasnip = pcall(require, "luasnip")
if not luasnip_ok then
return false
end
local win_get_cursor = vim.api.nvim_win_get_cursor
local get_current_buf = vim.api.nvim_get_current_buf
---sets the current buffer's luasnip to the one nearest the cursor
---@return boolean true if a node is found, false otherwise
local function seek_luasnip_cursor_node()
-- TODO(kylo252): upstream this
-- for outdated versions of luasnip
if not luasnip.session.current_nodes then
return false
end
local node = luasnip.session.current_nodes[get_current_buf()]
if not node then
return false
end
local snippet = node.parent.snippet
local exit_node = snippet.insert_nodes[0]
local pos = win_get_cursor(0)
pos[1] = pos[1] - 1
-- exit early if we're past the exit node
if exit_node then
local exit_pos_end = exit_node.mark:pos_end()
if (pos[1] > exit_pos_end[1]) or (pos[1] == exit_pos_end[1] and pos[2] > exit_pos_end[2]) then
snippet:remove_from_jumplist()
luasnip.session.current_nodes[get_current_buf()] = nil
return false
end
end
node = snippet.inner_first:jump_into(1, true)
while node ~= nil and node.next ~= nil and node ~= snippet do
local n_next = node.next
local next_pos = n_next and n_next.mark:pos_begin()
local candidate = n_next ~= snippet and next_pos and (pos[1] < next_pos[1])
or (pos[1] == next_pos[1] and pos[2] < next_pos[2])
-- Past unmarked exit node, exit early
if n_next == nil or n_next == snippet.next then
snippet:remove_from_jumplist()
luasnip.session.current_nodes[get_current_buf()] = nil
return false
end
if candidate then
luasnip.session.current_nodes[get_current_buf()] = node
return true
end
local ok
ok, node = pcall(node.jump_from, node, 1, true) -- no_move until last stop
if not ok then
snippet:remove_from_jumplist()
luasnip.session.current_nodes[get_current_buf()] = nil
return false
end
end
-- No candidate, but have an exit node
if exit_node then
-- to jump to the exit node, seek to snippet
luasnip.session.current_nodes[get_current_buf()] = snippet
return true
end
-- No exit node, exit from snippet
snippet:remove_from_jumplist()
luasnip.session.current_nodes[get_current_buf()] = nil
return false
end
if dir == -1 then
return luasnip.in_snippet() and luasnip.jumpable(-1) else
return luasnip.in_snippet() and seek_luasnip_cursor_node() and luasnip.jumpable(1)
end
end
M.methods = {}
M.methods.jumpable = jumpable
return M
|
