Add sections snippet

lua/custom/snippets/all.lua

@@ -1,21 +1,28 @@
 local ls = require "luasnip"
 local s = ls.snippet
+local t = ls.text_node
+local i = ls.insert_node
 local f = ls.function_node
 
+local util = require "custom.snippets.util"
+
 ls.add_snippets("all", {
   s("icd", {
-    f(function()
-      return os.date("%Y-%m-%d")
-    end)
+    f(util.today)
   }),
   s("ict", {
-    f(function()
-      return os.date("| %Y-%m-%d %H:%M | ")
-    end)
+    f(util.timestamp)
   }),
   s("шсе", {
-    f(function()
-      return os.date("| %Y-%m-%d %H:%M | ")
-    end)
-  })
+    f(util.timestamp)
+  }),
+  s({ trig = "csection", dscr = "# centered section header #" }, {
+    t "#",
+    f(util.pad_left(100, 1), { 1 }),
+    i(1, "Some topic"),
+    f(util.pad_right(100, 1), { 1 }),
+    t "#",
+    t { "", "" },
+    i(0),
+  }),
 })

lua/custom/snippets/python.lua

@@ -13,6 +13,8 @@ local fmt = require("luasnip.extras.fmt").fmt
 local fmta = require("luasnip.extras.fmt").fmta
 local rep = require("luasnip.extras").rep
 
+local util = require "custom.snippets.util"
+
 ls.add_snippets("python", {
   s(
     { trig = "ctable", dscr = "Create method or function with test stub" },
@@ -96,26 +98,14 @@ ls.add_snippets("python", {
       { i(1), rep(1), i(2), i(0) }
     )
   ),
-  s({ trig = "rupysection", dscr = "Secion snippet" },
-    fmt(
-      [[
-        ##################################### Секция #############################################
-        # Тема: {}
-        ##########################################################################################
-        {}
-        ]],
-      { i(1), i(0) }
-    )
-  ),
-  s({ trig = "pysection", dscr = "Secion snippet" },
-    fmt(
-      [[
-        ##################################### Section ############################################
-        # Section topic: {}
-        ##########################################################################################
-        {}
-        ]],
-      { i(1), i(0) }
-    )
-  ),
+  s({ trig = "pysection", dscr = "Section header" }, {
+    t { string.rep("#", 100), "" },
+    t "#",
+    f(util.pad_left(100, 1), { 1 }),
+    i(1, "Section topic"),
+    f(util.pad_right(100, 1), { 1 }),
+    t "#",
+    t { "", string.rep("#", 100), "" },
+    i(0),
+  }),
 })

lua/custom/snippets/util.lua

@@ -0,0 +1,49 @@
+-- Shared helper functions for use inside snippet function_node()/dynamic_node()
+
+local M = {}
+
+function M.today()
+  return os.date("%Y-%m-%d")
+end
+
+function M.timestamp()
+  return os.date("| %Y-%m-%d %H:%M | ")
+end
+
+function M.clipboard_or(default)
+  return function()
+    local clip = vim.fn.getreg "+"
+    return clip ~= "" and clip or default
+  end
+end
+
+-- Space padding to center `text` between fixed-width markers (e.g. "###")
+-- so the whole line (markers + padding + text) is exactly `width` chars.
+local function side_pad(text, width, marker_len)
+  local interior = width - marker_len * 2
+  local pad = math.max(interior - #text, 0)
+  local left = math.floor(pad / 2)
+  local right = pad - left
+  return left, right
+end
+
+-- Use as f(util.pad_left(100, 3), { N }) where N is the node index holding
+-- the text to center, placed right after the opening marker.
+function M.pad_left(width, marker_len)
+  width, marker_len = width or 100, marker_len or 3
+  return function(args)
+    local left = side_pad(args[1][1] or "", width, marker_len)
+    return string.rep(" ", left)
+  end
+end
+
+-- Companion to pad_left(), placed right before the closing marker.
+function M.pad_right(width, marker_len)
+  width, marker_len = width or 100, marker_len or 3
+  return function(args)
+    local _, right = side_pad(args[1][1] or "", width, marker_len)
+    return string.rep(" ", right)
+  end
+end
+
+return M