1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
--
-- Completion configuration plugin
--
------------------------------------------------------------------------------------------------------------------------
-- Insert mode completion
------------------------------------------------------------------------------------------------------------------------
-- See `:help ins-completion-menu`
vim.opt.autocomplete = true -- Show completion menu automatically
vim.opt.completeopt = {
"noselect", -- No item selected initially
"fuzzy",
"menuone", -- Show matches in a menu, even if there's only one match
"popup", -- Menu items show extra info in the popup window
}
-- Completion sources (in order of priority)
vim.opt.complete = {
"o", -- 'omnifunc'
}
vim.opt.pumwidth = 25
vim.keymap.set("i", "<Tab>", function()
return vim.fn.pumvisible() == 1 and "<C-n>" or "<Tab>"
end, { expr = true })
vim.keymap.set("i", "<S-Tab>", function()
return vim.fn.pumvisible() == 1 and "<C-p>" or "<S-Tab>"
end, { expr = true })
-- Jump between snippet placeholders, falling back to native behavior when no snippet is active
vim.keymap.set({ "i", "s" }, "<C-n>", function()
return vim.snippet.active({ direction = 1 }) and "<Cmd>lua vim.snippet.jump(1)<CR>" or "<C-n>"
end, { expr = true })
vim.keymap.set({ "i", "s" }, "<C-p>", function()
return vim.snippet.active({ direction = -1 }) and "<Cmd>lua vim.snippet.jump(-1)<CR>" or "<C-p>"
end, { expr = true })
------------------------------------------------------------------------------------------------------------------------
-- Snippet expansion fallback
------------------------------------------------------------------------------------------------------------------------
-- Work around Neovim's snippet grammar rejecting placeholder defaults that mix text with nested tabstops (e.g. lua_ls's
-- `${1:pairs(${2:t})}`): the `any_or_text` rule matches a single node, not a `(any + text)^1` sequence. On parse failure,
-- strip the snippet markup and insert it as plain text instead of throwing. Remove once fixed upstream.
-- The `@as table` cast retypes the module here so overriding `expand` isn't flagged as a duplicate field set.
local snippet = vim.snippet --[[@as table]]
local orig_expand = snippet.expand
-- Reduce LSP snippet syntax to plain text: keep placeholder/variable defaults, the first choice, drop bare tabstops.
local function strip_snippet(s)
local prev
repeat
prev = s
s = s:gsub("%$(%b{})", function(group)
local body = group:sub(2, -2)
local choice = body:match("^%d+|(.*)|$")
if choice then
return (choice:gsub(",.*$", "")) -- first choice
end
local default = body:match("^[%w_]+:(.*)$")
if default then
return default -- ${n:default} / ${VAR:default}
end
return "" -- bare ${n} / ${VAR}
end)
until s == prev
s = s:gsub("%$[%w_]+", "") -- bare $n / $VAR
s = s:gsub("\\([%$}{|,\\])", "%1") -- unescape
return s
end
local function insert_plain(text)
local win = vim.api.nvim_get_current_win()
local row, col = unpack(vim.api.nvim_win_get_cursor(win))
local indent = vim.api.nvim_get_current_line():match("^%s*") or ""
local lines = vim.split(text, "\n", { plain = true })
for i = 2, #lines do
lines[i] = indent .. lines[i]
end
vim.api.nvim_buf_set_text(0, row - 1, col, row - 1, col, lines)
local last = #lines
local new_row = row - 1 + (last - 1)
local new_col = last == 1 and col + #lines[1] or #lines[last]
vim.api.nvim_win_set_cursor(win, { new_row + 1, new_col })
end
snippet.expand = function(input)
local ok = pcall(orig_expand, input)
if not ok then
insert_plain(strip_snippet(input))
vim.notify("Snippet parse failed, inserted as plain text: " .. vim.inspect(input), vim.log.levels.WARN)
end
end
------------------------------------------------------------------------------------------------------------------------
-- Snippet completion source
------------------------------------------------------------------------------------------------------------------------
-- Exposes `vim.b.snippets` (trigger word -> LSP snippet body) as a 'complete' function source. A filetype opts in from
-- its ftplugin by setting `vim.b.snippets`, pointing 'completefunc' at this function, and appending "F" to 'complete'.
-- Must be a global so `v:lua` can reach it; see `:help complete-functions` and `:help v:lua-call`.
-- Render a snippet to preview text: resolve placeholders and their mirrors to the placeholder's default value.
local function render_snippet(s)
local defaults = {}
for n, d in s:gmatch("%${(%d+):([^{}]*)}") do
defaults[n] = d
end
local prev
repeat
prev = s
s = s:gsub("%$(%b{})", function(group)
local body = group:sub(2, -2)
local choice = body:match("^%d+|(.*)|$")
if choice then
return (choice:gsub(",.*$", "")) -- first choice
end
local default = body:match("^[%w_]+:(.*)$")
if default then
return default -- ${n:default} / ${VAR:default}
end
return defaults[body] or "" -- ${n} / ${VAR}
end)
until s == prev
s = s:gsub("%$(%d+)", function(n)
return defaults[n] or "" -- $n mirror
end)
s = s:gsub("%$[%w_]+", "") -- bare $VAR
s = s:gsub("\\([%$}{|,\\])", "%1") -- unescape
return s
end
function _G.dotfiles_snippet_source(findstart, base)
local snippets = vim.b.snippets or {}
local line = vim.api.nvim_get_current_line()
local col = vim.api.nvim_win_get_cursor(0)[2]
if findstart == 1 then
-- Walk back over trigger characters to find the range the match replaces.
local start = col
while start > 0 and line:sub(start, start):match("[%w_]") do
start = start - 1
end
return start
end
local items = {}
for trigger, body in pairs(snippets) do
if vim.startswith(trigger, base) then
items[#items + 1] = {
word = trigger,
kind = "Snippet",
menu = "[snippet]",
info = render_snippet(body),
user_data = { snippet = body },
}
end
end
return items
end
-- Expand the snippet once one of the items above is accepted (its trigger word is inserted first, so remove it).
vim.api.nvim_create_autocmd("CompleteDone", {
desc = "Expand accepted snippet completion",
group = vim.g.dotfiles.augroup,
callback = function()
local item = vim.v.completed_item
local data = item.user_data
if type(data) ~= "table" or not data.snippet then
return
end
local row, col = unpack(vim.api.nvim_win_get_cursor(0))
vim.api.nvim_buf_set_text(0, row - 1, col - #item.word, row - 1, col, { "" })
vim.snippet.expand(data.snippet)
end,
})
------------------------------------------------------------------------------------------------------------------------
-- Command-line mode completion
------------------------------------------------------------------------------------------------------------------------
-- See `:help cmdline-completion` and `:help cmdline-autocompletion`
-- Show completion menu automatically
vim.api.nvim_create_autocmd({ "CmdlineChanged", "CmdlineEnter" }, {
desc = "Autocompletion",
group = vim.g.dotfiles.augroup,
pattern = "[:\\/\\?]",
callback = function()
vim.fn.wildtrigger()
end,
})
vim.opt.wildmenu = true -- Show completions in a menu
vim.opt.wildchar = 9 -- Char code assigned to command line wildcard expansion
vim.opt.pumborder = "rounded"
vim.opt.wildoptions = {
"exacttext", -- Discard regex artifacts when performing search pattern completion
"pum", -- Show completions in a popup menu
"tagfile", -- Show tag kind and file
"fuzzy", -- Fuzzy matching (doesn't work with files/dirs, see `:help 'wildoptions'`, but patterns do work!)
}
-- Completion modes triggered in order by `wildtrigger()` or 'wildchar'
vim.opt.wildmode = {
"noselect", -- List matches without inserting
"full", -- List matches and insert first full match
}
-- Insert unique match
vim.keymap.set("c", string.format("%c", vim.o.wildchar), function()
local complete_info = vim.fn.cmdcomplete_info()
if complete_info.pum_visible == 1 then
return #complete_info.matches == 1 and "<C-n><Space><BS>" or "<C-n>"
end
vim.fn.wildtrigger()
end, { expr = true, desc = "Command line wildcard expansion" })
-- Show next completion choices after accepting an entry with `<C-y>`
vim.keymap.set("c", "<C-y>", function()
local complete_info = vim.fn.cmdcomplete_info()
if complete_info.pum_visible == 1 then
return complete_info.selected ~= -1 and "<Space><BS>" or "<C-e>"
end
return "<C-y>"
end, { expr = true })
|
