neovim conf part 3

.config/nvim/lua/config/util.lua

@@ -0,0 +1,85 @@
+local function starts_with(str, prefix)
+  return string.find(str, '^' .. prefix) ~= nil
+end
+
+local function get_dock_win()
+  local windows = vim.api.nvim_list_wins()
+  for _, win in ipairs(windows) do
+    if vim.api.nvim_win_get_tabpage(win) == vim.api.nvim_get_current_tabpage() then
+      local width = vim.api.nvim_win_get_width(win)
+      if width == 60 or width == 40 then
+        return win
+      end
+    end
+  end
+  return nil
+end
+
+local function get_dock_buf(prefix)
+  local buffers = vim.api.nvim_list_bufs()
+  for _, buf in ipairs(buffers) do
+    if vim.api.nvim_buf_is_loaded(buf) then
+      local buf_name = vim.api.nvim_buf_get_name(buf)
+      if starts_with(buf_name, prefix) then
+        return buf
+      end
+    end
+  end
+  return nil
+end
+
+
+return {
+  open_in_right_dock = function (prefix)
+
+    -- set width accroding to terminal/oil
+    local width = prefix == 'term://' and 60 or 40
+
+    -- get dock window if exists
+    local dock_win = get_dock_win()
+    if dock_win ~= nil then
+
+      local buf = vim.api.nvim_win_get_buf(dock_win)
+      local buf_name = vim.api.nvim_buf_get_name(buf)
+      vim.api.nvim_set_current_win(dock_win)
+      vim.api.nvim_win_set_width(dock_win, width)
+
+      if starts_with(buf_name, prefix) then
+        if prefix == 'term://' then
+          vim.api.nvim_feedkeys('a', 'n',  true)
+        end
+      else
+        if prefix == 'term://' then
+          vim.cmd.term()
+          vim.api.nvim_feedkeys('a', 'n',  true)
+        else
+          vim.cmd('Oil')
+        end
+      end
+      return
+    end
+
+    -- no dock window at this point so create new
+    vim.cmd.vnew()
+    vim.api.nvim_win_set_width(0, width)
+
+    -- get existing buf if exists
+    local dock_buf = get_dock_buf(prefix)
+
+    if dock_buf ~= nil then
+      vim.api.nvim_set_current_buf(dock_buf)
+      if prefix == 'term://' then
+        vim.api.nvim_feedkeys('a', 'n',  true)
+      end
+      return
+    end
+
+    if prefix == 'term://' then
+      vim.cmd.term()
+      vim.api.nvim_feedkeys('a', 'n',  true)
+    else
+      vim.cmd('Oil')
+    end
+
+  end
+}