fix: Respect cmdheight and laststatus

lua/telescope/config/resolve.lua

@@ -98,7 +98,7 @@ local _resolve_map = {
   end,
 
   -- Percentages
-  [function(val) return type(val) == 'number' and val > 0 and val < 1 end] = function(selector, val)
+  [function(val) return type(val) == 'number' and val >= 0 and val < 1 end] = function(selector, val)
     return function(...)
       return math.floor(val * select(selector, ...))
     end

lua/telescope/pickers.lua

@@ -280,7 +280,12 @@ function Picker:find()
   -- 1. Prompt window
   -- 2. Options window
   -- 3. Preview window
-  local popup_opts = self:get_window_options(vim.o.columns, vim.o.lines)
+  local line_count = vim.o.lines - vim.o.cmdheight
+  if vim.o.laststatus ~= 0 then
+    line_count = line_count - 1
+  end
+
+  local popup_opts = self:get_window_options(vim.o.columns, line_count)
 
   -- `popup.nvim` massaging so people don't have to remember minheight shenanigans
   popup_opts.results.minheight = popup_opts.results.height

lua/telescope/pickers/layout_strategies.lua

@@ -215,18 +215,25 @@ layout_strategies.vertical = function(self, max_columns, max_lines)
   prompt.width = width
 
   -- Height
-  local height_padding = resolve.resolve_height(layout_config.height_padding or 3)(self, max_columns, max_lines)
+  local height_padding = math.max(
+    1, 
+    resolve.resolve_height(layout_config.height_padding or 3)(self, max_columns, max_lines)
+  )
+  local picker_height = max_lines - 2 * height_padding
 
-  results.height = resolve.resolve_height(layout_config.results_height or 10)(self, max_columns, max_lines)
-  prompt.height = 1
-
-  -- The last 2 * 2 is for the extra borders
+  local preview_total = 0
+  preview.height = 0
   if self.previewer then
-    preview.height = max_lines - results.height - prompt.height - 2 * 2 - height_padding * 2
-  else
-    results.height = max_lines - prompt.height - 2 - height_padding * 2
+    preview.height = resolve.resolve_height(
+      layout_config.preview_height or (max_lines - 15)
+    )(self, max_columns, picker_height)
+
+    preview_total = preview.height + 2
   end
 
+  prompt.height = 1
+  results.height = picker_height - preview_total - prompt.height - 2
+
   results.col, preview.col, prompt.col = width_padding, width_padding, width_padding
 
   if self.previewer then