Improove window options configurations

## Changes Description

This commit adds the ability to customize window options `vim.wo` for
windows Overseer creates (e.g. the task_list, the output, etc.). It also
fixes a problem where pre-defined window options are reset after the
main buffer changes on the window.

lua/overseer/config.lua

@@ -26,6 +26,20 @@ local default_config = {
     separator = "────────────────────────────────────────",
     -- Default direction. Can be "left", "right", or "bottom"
     direction = "left",
+    -- You can set window options (see `:help vim.wo`) to be used when creating
+    -- the Task List window, these are the defaults used:
+    win_opts = {
+      listchars = "tab:> ",
+      winfixwidth = true,
+      winfixheight = true,
+      number = false,
+      relativenumber = false,
+      foldcolumn = "0",
+      signcolumn = "no",
+      statuscolumn = "",
+      wrap = false,
+      spell = false,
+    },
     -- Set keymap to false to remove default behavior
     -- You can add custom keymaps here as well (anything vim.keymap.set accepts)
     bindings = {
@@ -51,6 +65,24 @@ local default_config = {
       ["<C-j>"] = "ScrollOutputDown",
       ["q"] = "Close",
     },
+    -- When the Task List is positioned at the bottom, it will show its output
+    -- window on the right side of the split. The next configuration table
+    -- tweaks options for such window
+    output = {
+      -- You can set window options (see `:help vim.wo`) to be used when
+      -- creating the Task List Output window, these are the defaults used:
+      win_opts = {
+        number = false,
+        relativenumber = false,
+        cursorline = false,
+        cursorcolumn = false,
+        foldcolumn = "0",
+        signcolumn = "no",
+        statuscolumn = "",
+        spell = false,
+        list = false,
+      },
+    },
   },
   -- See :help overseer-actions
   actions = {},

lua/overseer/task_list/sidebar.lua

@@ -217,6 +217,24 @@ function Sidebar:_get_preview_wins()
   return ret
 end
 
+---@param winid number
+---@param bufnr number
+---@param window_opts vim.wo
+function Sidebar:_update_window_buf(winid, bufnr, window_opts)
+  if vim.api.nvim_win_get_buf(winid) ~= bufnr then
+    vim.api.nvim_win_set_buf(winid, bufnr)
+    -- The documentation of `vim.api.nvim_win_set_buf` states that it will
+    -- "Set the current buffer in a window, without side effects", but
+    -- unfortunately, some window options are not kept when a "new" buffer is
+    -- set to the window. For instance, the `winhighlight` and the experimental
+    -- `statuscolumn` options may change with a new buffer, therefore, to make
+    -- the appearance of the window consistent, we re-apply its window options
+    -- when switching its current buffer.
+    util.set_window_opts(window_opts, winid)
+    util.scroll_to_end(winid)
+  end
+end
+
 function Sidebar:update_preview()
   local winids = self:_get_preview_wins()
   if vim.tbl_isempty(winids) then
@@ -240,9 +258,12 @@ function Sidebar:update_preview()
   end
 
   for _, winid in ipairs(winids) do
-    if vim.api.nvim_win_get_buf(winid) ~= display_buf then
-      vim.api.nvim_win_set_buf(winid, display_buf)
-      util.scroll_to_end(winid)
+    -- We need to use different window options between the floating preview
+    -- window and the output one
+    if vim.wo[winid].previewwindow then
+      self:_update_window_buf(winid, display_buf, config.task_win.win_opts)
+    else
+      self:_update_window_buf(winid, display_buf, config.task_list.output.win_opts)
     end
   end
 end

lua/overseer/util.lua

@@ -147,6 +147,15 @@ M.scroll_to_end = function(winid)
   vim.api.nvim_set_option_value("scrolloff", scrolloff, { scope = "local", win = winid })
 end
 
+---@param win_opts vim.wo
+---@param winid? number
+M.set_window_opts = function(win_opts, winid)
+  winid = winid or 0
+  for k, v in pairs(win_opts) do
+    vim.api.nvim_set_option_value(k, v, { scope = "local", win = winid })
+  end
+end
+
 ---@param bufnr number
 ---@param ns number
 ---@param highlights table
@@ -265,10 +274,12 @@ end
 
 ---Set the appropriate window options for a terminal buffer
 M.set_term_window_opts = function(winid)
-  winid = winid or 0
-  vim.api.nvim_set_option_value("number", false, { scope = "local", win = winid })
-  vim.api.nvim_set_option_value("relativenumber", false, { scope = "local", win = winid })
-  vim.api.nvim_set_option_value("signcolumn", "no", { scope = "local", win = winid })
+  M.set_window_opts({
+    number = false,
+    relativenumber = false,
+    signcolumn = "no",
+    statuscolumn = "",
+  }, winid)
 end
 
 ---@generic T : any

lua/overseer/window.lua

@@ -21,23 +21,6 @@ local function watch_for_win_closed()
   })
 end
 
-local min_win_opts = {
-  number = false,
-  relativenumber = false,
-  cursorline = false,
-  cursorcolumn = false,
-  foldcolumn = "0",
-  signcolumn = "no",
-  spell = false,
-  list = false,
-}
----@param winid integer
-local function set_minimal_win_opts(winid)
-  for k, v in pairs(min_win_opts) do
-    vim.api.nvim_set_option_value(k, v, { scope = "local", win = winid })
-  end
-end
-
 ---@param direction "left"|"right"|"bottom"
 ---@param existing_win integer
 local function create_overseer_window(direction, existing_win)
@@ -68,34 +51,21 @@ local function create_overseer_window(direction, existing_win)
       vim.bo[outbuf].bufhidden = "wipe"
     end
     util.go_buf_no_au(outbuf)
-    set_minimal_win_opts(0)
+    util.set_window_opts(config.task_list.output.win_opts, 0)
     util.go_win_no_au(winid)
     vim.w.overseer_output_win = output_win
     watch_for_win_closed()
   end
 
   util.go_buf_no_au(bufnr)
-  local default_opts = {
-    listchars = "tab:> ",
-    winfixwidth = true,
-    winfixheight = true,
-    number = false,
-    signcolumn = "no",
-    foldcolumn = "0",
-    relativenumber = false,
-    wrap = false,
-    spell = false,
-  }
-  for k, v in pairs(default_opts) do
-    vim.api.nvim_set_option_value(k, v, { scope = "local", win = 0 })
-  end
+  util.set_window_opts(config.task_list.win_opts, 0)
   vim.api.nvim_win_set_width(0, layout.calculate_width(nil, config.task_list))
   if direction == "bottom" then
     vim.api.nvim_win_set_height(0, layout.calculate_height(nil, config.task_list))
   end
   -- Set the filetype only after we enter the buffer so that FileType autocmds
   -- behave properly
-  vim.bo[bufnr].filetype = "OverseerList"
+  vim.api.nvim_set_option_value("filetype", "OverseerList", { buf = bufnr })
 
   util.go_win_no_au(my_winid)
   return winid