feat: (wip) current_buffer strategy

lua/telescope/pickers/layout_strategies.lua

@@ -156,6 +156,62 @@ layout_strategies.flex = function(self, max_columns, max_lines, prompt_title)
   end
 end
 
+layout_strategies.current_buffer = function(self, _, _, prompt_title)
+  local initial_options = self:_get_initial_window_options(prompt_title)
+
+  local window_width = vim.api.nvim_win_get_width(0)
+  local window_height = vim.api.nvim_win_get_height(0)
+
+  local preview = initial_options.preview
+  local results = initial_options.results
+  local prompt = initial_options.prompt
+
+  local width_padding = 2
+  local width = window_width - width_padding * 2
+  if not self.previewer then
+    preview.width = 0
+  else
+    preview.width = width
+  end
+  results.width = width
+  prompt.width = width
+
+  -- Height
+  local height_padding = 3
+
+  results.height = 10
+  prompt.height = 1
+
+  -- The last 2 * 2 is for the extra borders
+  if self.previewer then
+    preview.height = window_height - results.height - prompt.height - 2 * 2 - height_padding * 2
+  else
+    results.height = window_height - prompt.height - 2 - height_padding * 2
+  end
+
+
+  local win_position = vim.api.nvim_win_get_position(0)
+
+  local line = win_position[1]
+  if self.previewer then
+    preview.line = height_padding + line
+    results.line = preview.line + preview.height + 2
+    prompt.line = results.line + results.height + 2
+  else
+    results.line = height_padding + line
+    prompt.line = results.line + results.height + 2
+  end
+
+  local col = win_position[2] + width_padding
+  preview.col, results.col, prompt.col = col, col, col
+
+  return {
+    preview = preview.width > 0 and preview,
+    results = results,
+    prompt = prompt,
+  }
+end
+
 -- TODO: Add "flex"
 -- If you don't have enough width, use the height one
 -- etc.