ftplugin/markdown: lots of changes

- move from ftplugin to after/ftplugin
- add keywordprg to lookup words in the dictionary

1 files changed, 32 insertions, 0 deletions

diff --git a/after/ftplugin/markdown.lua b/after/ftplugin/markdown.lua
new file mode 100644
index 0000000..ac4a84e
--- /dev/null
+++ b/after/ftplugin/markdown.lua
@@ -0,0 +1,32 @@
+local l = vim.opt_local
+
+l.keywordprg = ":MarkdownDictLookup" -- open dictionary for word under cursor
+                                     -- with K
+
+l.formatprg = "par -w 80" -- to format paragraphs with gq
+l.textwidth = 80          -- wrap at 80 characters
+l.wrap = true             -- autowrap at 👆
+l.spell = true            -- enable spell checking
+
+l.conceallevel = 2  -- conceal by default
+
+-- change conceallevel depending on the mode and never conceal in Insert mode
+vim.api.nvim_create_autocmd({ "InsertEnter" }, {
+   pattern = { "*.{markdown,md}" },
+   callback = function(_) l.conceallevel = 0 end,
+})
+
+vim.api.nvim_create_autocmd({ "InsertLeave" }, {
+   pattern = { "*.{markdown,md}" },
+   callback = function(_) l.conceallevel = 2 end,
+})
+
+-- The custom user command used by keywordprg. I need this because vim insers a
+-- space between keywordprg and the actual word. That is, to lookup 'foo', it
+-- would run "open dict:// foo" which obviously won't work. There's no way to
+-- make keywordprg take a lua fn, but it takes an Ex command like this just
+-- fine.
+-- Took the idea from https://vi.stackexchange.com/questions/36890/how-to-set-keywordprg-to-call-a-lua-function-in-neovim
+vim.api.nvim_buf_create_user_command(0, "MarkdownDictLookup", function(opts)
+   vim.fn.system("open dict://" .. opts.args)
+end, { nargs = 1 })