From 8836303ced67592ddd83244f7664acce1640d6a6 Mon Sep 17 00:00:00 2001
From: Fernando Schauenburg <dev@schauenburg.me>
Date: Mon, 7 Aug 2023 00:59:46 +0200
Subject: [PATCH] vim: add mappings to toggle quickfix and loclist

---
 config/nvim/lua/fschauen/keymap.lua |  4 ++++
 config/nvim/lua/fschauen/util.lua   | 22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/config/nvim/lua/fschauen/keymap.lua b/config/nvim/lua/fschauen/keymap.lua
index 7d51994..58cc7dc 100644
--- a/config/nvim/lua/fschauen/keymap.lua
+++ b/config/nvim/lua/fschauen/keymap.lua
@@ -68,6 +68,10 @@ nmap('<a-Up>',   '<cmd>lprevious<cr>zz', { silent = true })
 nmap('<leader>j', require('fschauen.util').goto_next_diagnostic)
 nmap('<leader>k', require('fschauen.util').goto_prev_diagnostic)
 
+-- toggle quickfix and location lists
+nmap('<leader>lq', util.toggle_quickfix, { desc = 'Toggle quickfix' } )
+nmap('<leader>ll', util.toggle_loclist,  { desc = 'Toggle loclist' } )
+
 -- quickly open lazy.nvim plugin manager
 nmap('<leader>L', '<cmd>Lazy<cr>')
 
diff --git a/config/nvim/lua/fschauen/util.lua b/config/nvim/lua/fschauen/util.lua
index 0380435..071092d 100644
--- a/config/nvim/lua/fschauen/util.lua
+++ b/config/nvim/lua/fschauen/util.lua
@@ -132,5 +132,27 @@ M.win_resize_left  = function(size) return M.thunk(win_resize, 'h', size) end
 ---@param size integer: how much to resize
 M.win_resize_right = function(size) return M.thunk(win_resize, 'l', size) end
 
+--- Toggle quickfix (or location) list.
+---@param qf string: 'c' for quickfix, 'l' for location list
+local toggle_qf_list = function(qf)
+  local l = qf == 'l' and 1 or 0
+  local is_qf = function(win) return win.quickfix == 1 and win.loclist == l end
+  local is_open = not vim.tbl_isempty(vim.tbl_filter(is_qf, vim.fn.getwininfo()))
+  if is_open then
+    vim.cmd(qf .. 'close')
+  else
+    local ok = pcall(function(c) vim.cmd(c) end, qf .. 'open')
+    if not ok and qf == 'l' then
+      vim.notify('No location list', vim.log.levels.WARN)
+    end
+  end
+end
+
+--- Toggle quickfix list.
+M.toggle_quickfix = function() toggle_qf_list('c') end
+
+--- Toggle location list.
+M.toggle_loclist = function() toggle_qf_list('l') end
+
 return M