dotfiles/symlinks/config/nvim/plugin/snippets.lua

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local luasnip = require("luasnip")
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local types = require("luasnip.util.types")
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local s = luasnip.snippet
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local sn = luasnip.snippet_node
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local f = luasnip.function_node
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local t = luasnip.text_node
local i = luasnip.insert_node
local c = luasnip.choice_node
local d = luasnip.dynamic_node
luasnip.config.setup({
ext_opts = {
[types.choiceNode] = {
active = {
virt_text = { { "", "GruvboxOrange" } },
},
},
[types.insertNode] = {
active = {
virt_text = { { "", "GruvboxBlue" } },
},
},
},
})
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luasnip.add_snippets("all", {
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s("date", { f(function(_, _)
return os.date("%Y-%m-%d")
end) }),
s("datetime", { f(function(_, _)
return os.date("%Y-%m-%d %H:%M:%S")
end) }),
s("diso", { f(function(_, _)
return os.date("%Y-%m-%dT%H:%M:%S")
end) }),
s("disoutc", { f(function(_, _)
return os.date("!%Y-%m-%dT%H:%M:%SZ")
end) }),
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})
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-- Java snippets
local function jdocsnip(args, _, old_state)
-- !!! old_state is used to preserve user-input here. DON'T DO IT THAT WAY!
-- Using a restoreNode instead is much easier.
-- View this only as an example on how old_state functions.
local nodes = {
t({ "/**", " * " }),
i(1, "A short Description"),
t({ "", "" }),
}
-- These will be merged with the snippet; that way, should the snippet be updated,
-- some user input eg. text can be referred to in the new snippet.
local param_nodes = {}
if old_state then
nodes[2] = i(1, old_state.descr:get_text())
end
param_nodes.descr = nodes[2]
-- At least one param.
if string.find(args[2][1], ", ") then
vim.list_extend(nodes, { t({ " * ", "" }) })
end
local insert = 2
for _, arg in ipairs(vim.split(args[2][1], ", ", true)) do
-- Get actual name parameter.
arg = vim.split(arg, " ", true)[2]
if arg then
local inode
-- if there was some text in this parameter, use it as static_text for this new snippet.
if old_state and old_state[arg] then
inode = i(insert, old_state["arg" .. arg]:get_text())
else
inode = i(insert)
end
vim.list_extend(nodes, { t({ " * @param " .. arg .. " " }), inode, t({ "", "" }) })
param_nodes["arg" .. arg] = inode
insert = insert + 1
end
end
if args[1][1] ~= "void" then
local inode
if old_state and old_state.ret then
inode = i(insert, old_state.ret:get_text())
else
inode = i(insert)
end
vim.list_extend(nodes, { t({ " * ", " * @return " }), inode, t({ "", "" }) })
param_nodes.ret = inode
insert = insert + 1
end
if vim.tbl_count(args[3]) ~= 1 then
local exc = string.gsub(args[3][2], " throws ", "")
local ins
if old_state and old_state.ex then
ins = i(insert, old_state.ex:get_text())
else
ins = i(insert)
end
vim.list_extend(nodes, { t({ " * ", " * @throws " .. exc .. " " }), ins, t({ "", "" }) })
param_nodes.ex = ins
insert = insert + 1
end
vim.list_extend(nodes, { t({ " */" }) })
local snip = sn(nil, nodes)
-- Error on attempting overwrite.
snip.old_state = param_nodes
return snip
end
luasnip.add_snippets("java", {
-- Very long example for a java class.
s("fn", {
d(6, jdocsnip, { 2, 4, 5 }),
t({ "", "" }),
c(1, {
t("public "),
t("private "),
}),
c(2, {
t("void"),
t("String"),
t("char"),
t("int"),
t("double"),
t("boolean"),
i(nil, ""),
}),
t(" "),
i(3, "myFunc"),
t("("),
i(4),
t(")"),
c(5, {
t(""),
sn(nil, {
t({ "", " throws " }),
i(1),
}),
}),
t({ " {", "\t" }),
i(0),
t({ "", "}" }),
}),
}, {
key = "java",
})
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require("luasnip.loaders.from_vscode").lazy_load()
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require("luasnip").filetype_extend("java", { "javadoc", "java-tests" })