small refactoring

lua/lazygit/window.lua

@@ -0,0 +1,85 @@
+local api = vim.api
+
+
+--- open floating window with nice borders
+local function open_floating_window()
+  local floating_window_scaling_factor = vim.g.lazygit_floating_window_scaling_factor
+
+  -- Why is this required?
+  -- vim.g.lazygit_floating_window_scaling_factor returns different types if the value is an integer or float
+  if type(floating_window_scaling_factor) == 'table' then
+    floating_window_scaling_factor = floating_window_scaling_factor[false]
+  end
+
+  local status, plenary = pcall(require, 'plenary.window.float')
+  if status and vim.g.lazygit_floating_window_use_plenary and vim.g.lazygit_floating_window_use_plenary ~= 0 then
+    plenary.percentage_range_window(floating_window_scaling_factor, floating_window_scaling_factor)
+    return
+  end
+
+  local height = math.ceil(vim.o.lines * floating_window_scaling_factor) - 1
+  local width = math.ceil(vim.o.columns * floating_window_scaling_factor)
+
+  local row = math.ceil(vim.o.lines - height) / 2
+  local col = math.ceil(vim.o.columns - width) / 2
+
+  local border_opts = {
+    style = 'minimal',
+    relative = 'editor',
+    row = row - 1,
+    col = col - 1,
+    width = width + 2,
+    height = height + 2,
+  }
+
+  local opts = { style = 'minimal', relative = 'editor', row = row, col = col, width = width, height = height }
+
+  local topleft, topright, botleft, botright
+  local corner_chars = vim.g.lazygit_floating_window_corner_chars
+  if type(corner_chars) == 'table' and #corner_chars == 4 then
+    topleft, topright, botleft, botright = unpack(corner_chars)
+  else
+    topleft, topright, botleft, botright = '╭', '╮', '╰', '╯'
+  end
+
+  local border_lines = { topleft .. string.rep('─', width) .. topright }
+  local middle_line = '│' .. string.rep(' ', width) .. '│'
+  for i = 1, height do
+    table.insert(border_lines, middle_line)
+  end
+  table.insert(border_lines, botleft .. string.rep('─', width) .. botright)
+
+  -- create a unlisted scratch buffer for the border
+  local border_buffer = api.nvim_create_buf(false, true)
+
+  -- set border_lines in the border buffer from start 0 to end -1 and strict_indexing false
+  api.nvim_buf_set_lines(border_buffer, 0, -1, true, border_lines)
+  -- create border window
+  local border_window = api.nvim_open_win(border_buffer, true, border_opts)
+  vim.cmd('set winhl=Normal:Floating')
+
+  -- create a unlisted scratch buffer
+  if LAZYGIT_BUFFER == nil or vim.fn.bufwinnr(LAZYGIT_BUFFER) == -1 then
+    LAZYGIT_BUFFER = api.nvim_create_buf(false, true)
+  else
+    LAZYGIT_LOADED = true
+  end
+  -- create file window, enter the window, and use the options defined in opts
+  local _ = api.nvim_open_win(LAZYGIT_BUFFER, true, opts)
+
+  vim.bo[LAZYGIT_BUFFER].filetype = 'lazygit'
+
+  vim.cmd('setlocal bufhidden=hide')
+  vim.cmd('setlocal nocursorcolumn')
+  vim.cmd('set winblend=' .. vim.g.lazygit_floating_window_winblend)
+
+  -- use autocommand to ensure that the border_buffer closes at the same time as the main buffer
+  local cmd = [[autocmd WinLeave <buffer> silent! execute 'hide']]
+  vim.cmd(cmd)
+  cmd = [[autocmd WinLeave <buffer> silent! execute 'silent bdelete! %s']]
+  vim.cmd(cmd:format(border_buffer))
+end
+
+return {
+  open_floating_window = open_floating_window,
+}