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-- Extra functionality for displaying Vim help.
local M = {}
-- Called when editing the doc/syntax.txt file
function M.highlight_groups()
local save_cursor = vim.fn.getcurpos()
local start_lnum = vim.fn.search([[\*highlight-groups\*]], 'c')
if start_lnum == 0 then
return
end
local end_lnum = vim.fn.search('^======')
if end_lnum == 0 then
return
end
local ns = vim.api.nvim_create_namespace('vimhelp')
vim.api.nvim_buf_clear_namespace(0, ns, 0, -1)
for lnum = start_lnum, end_lnum do
local word = vim.api.nvim_buf_get_lines(0, lnum - 1, lnum, true)[1]:match('^(%w+)\t')
if vim.fn.hlexists(word) ~= 0 then
vim.api.nvim_buf_set_extmark(0, ns, lnum - 1, 0, { end_col = #word, hl_group = word })
end
end
vim.fn.setpos('.', save_cursor)
end
return M
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