more work on latex snippets

.config/nvim/lua/plugins/luasnip.lua

@@ -8,7 +8,7 @@ local f = luasnip.function_node
 luasnip.setup({
     history = true,
     enable_autosnippets = true,
-    update_events = {"TextChanged", "TextChangedI"},
+    update_events = { "TextChanged", "TextChangedI" },
     snip_env = {
         s = function(...)
             local snip = luasnip.s(...)

.config/nvim/lua/snippets/tex.lua

@@ -1,30 +1,31 @@
--- NOTE: These snippets are for taking notes quickly
+-- Copied from Gilles Castel (R.I.P.)
+-- https://castel.dev/post/lecture-notes-1/
 
 local ls = require("luasnip")
 local s = ls.snippet
--- local sn = ls.snippet_node
--- local isn = ls.indent_snippet_node
--- local t = ls.text_node
+local sn = ls.snippet_node
+local isn = ls.indent_snippet_node
+local t = ls.text_node
 local i = ls.insert_node
 local f = ls.function_node
--- local c = ls.choice_node
--- local d = ls.dynamic_node
--- local r = ls.restore_node
--- local events = require("luasnip.util.events")
--- local ai = require("luasnip.nodes.absolute_indexer")
--- local extras = require("luasnip.extras")
--- local l = extras.lambda
--- local rep = extras.rep
--- local p = extras.partial
--- local m = extras.match
--- local n = extras.nonempty
--- local dl = extras.dynamic_lambda
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require("luasnip.util.events")
+local ai = require("luasnip.nodes.absolute_indexer")
+local extras = require("luasnip.extras")
+local l = extras.lambda
+local rep = extras.rep
+local p = extras.partial
+local m = extras.match
+local n = extras.nonempty
+local dl = extras.dynamic_lambda
 local fmt = require("luasnip.extras.fmt").fmt
--- local fmta = require("luasnip.extras.fmt").fmta
--- local conds = require("luasnip.extras.expand_conditions")
--- local postfix = require("luasnip.extras.postfix").postfix
--- local types = require("luasnip.util.types")
--- local parse = require("luasnip.util.parser").parse_snippet
+local fmta = require("luasnip.extras.fmt").fmta
+local conds = require("luasnip.extras.expand_conditions")
+local postfix = require("luasnip.extras.postfix").postfix
+local types = require("luasnip.util.types")
+local parse = require("luasnip.util.parser").parse_snippet
 local ms = ls.multi_snippet
 
 local function has_value(tab, val)
@@ -44,6 +45,24 @@ local function cond_space(args, _)
     return ' '
 end
 
+local function sub_capture(index, first, last)
+    return f(function(_, snip, user_arg1) return snip.captures[user_arg1]:sub(first, last) end, nil,
+    { user_args = { index } })
+end
+
+local function in_comment()
+    return vim.fn['vimtex#syntax#in_comment']() == 1
+end
+
+local function in_math()
+    return vim.fn['vimtex#syntax#in_mathzone']() == 1
+end
+
+local function in_env(name)
+    local x, y = vim.fn['vimtex#env#is_inside'](name)
+    return (x ~= '0' and y ~= '0')
+end
+
 return {
 }, {
     s({ trig = "^beg", regTrig = true, wordTrig = false, name = "begin{} / end{}" }, fmt([[
@@ -89,5 +108,20 @@ return {
     }, fmt([[
         \\frac{{{}}}{{{}}}
     ]], { capture(1), i(1) })),
+    s({ trig = "(%b())/", name = "Fraction", regTrig = true }, fmt([[
+        \\frac{{{}}}{{{}}}
+    ]], { sub_capture(1, 2, -2), i(1) })),
+    s({ trig = "([A-Za-z])bar", regTrig = true, name = "Overline" }, fmt([[
+        \overline{{{}}}
+    ]], { capture(1) })),
+    s({ trig = "bar", name = "Overline" }, fmt([[
+        \overline{{{}}}
+    ]], { i(1) })),
+    s({ trig = "([A-Za-z])hat", regTrig = true, name = "Hat" }, fmt([[
+        \hat{{{}}}
+    ]], { capture(1) })),
+    s({ trig = "hat", name = "Hat" }, fmt([[
+        \hat{{{}}}
+    ]], { i(1) })),
     -- TODO: continue porting these snippets: https://castel.dev/post/lecture-notes-1/#fractions
 }