1 files changed, 60 insertions, 0 deletions
diff --git a/hm/soispha/conf/nvim/plugins/luasnip/lua/snippets/all.lua b/hm/soispha/conf/nvim/plugins/luasnip/lua/snippets/all.lua
new file mode 100644
index 00000000..5ce91a87
--- /dev/null
+++ b/hm/soispha/conf/nvim/plugins/luasnip/lua/snippets/all.lua
@@ -0,0 +1,60 @@
+local get_visual = function(args, parent)
+  if #parent.snippet.env.SELECT_RAW > 0 then
+    return sn(nil, i(1, parent.snippet.env.SELECT_RAW))
+  else
+    return sn(nil, i(1, ""))
+  end
+end
+local function char_count_same(c1, c2)
+  local line = vim.api.nvim_get_current_line()
+  -- '%'-escape chars to force explicit match (gsub accepts patterns).
+  -- second return value is number of substitutions.
+  local _, ct1 = string.gsub(line, "%" .. c1, "")
+  local _, ct2 = string.gsub(line, "%" .. c2, "")
+  return ct1 == ct2
+end
+
+local function even_count(c)
+  local line = vim.api.nvim_get_current_line()
+  local _, ct = string.gsub(line, c, "")
+  return ct % 2 == 0
+end
+
+local function neg(fn, ...)
+  return not fn(...)
+end
+
+local function part(fn, ...)
+  local args = { ...; }
+  return function()
+    return fn(unpack(args))
+  end
+end
+
+-- This makes creation of pair-type snippets easier.
+local function pair(pair_begin, pair_end, expand_func, ...)
+  -- triggerd by opening part of pair, wordTrig=false to trigger anywhere.
+  -- ... is used to pass any args following the expand_func to it.
+  return s(
+    { trig = pair_begin; wordTrig = false; snippetType = "autosnippet"; },
+    { t({ pair_begin; }); d(1, get_visual); t({ pair_end; }); },
+    { condition = part(expand_func, part(..., pair_begin, pair_end)); }
+  )
+end
+
+local maybe = { pair = nil; }
+if vim.bo.filetype == "tex" then
+  maybe.pair = pair("<", ">", neg, char_count_same)
+end
+
+local output_table = {
+  pair("(", ")", neg, char_count_same);
+  pair("{", "}", neg, char_count_same);
+  pair("[", "]", neg, char_count_same);
+  pair("'", "'", neg, even_count);
+  pair('"', '"', neg, even_count);
+  pair("`", "`", neg, even_count);
+}
+output_table[#output_table + 1] = maybe.pair
+
+return output_table