From a810700bb8189fe7fb699f388fda6fdb9869fac8 Mon Sep 17 00:00:00 2001
From: Folke Lemaitre <folke.lemaitre@gmail.com>
Date: Tue, 25 Oct 2022 20:33:56 +0200
Subject: [PATCH] feat: automatically move out of the way of existing floating
 windows. Fixes #117

---
 lua/noice/util/nui.lua | 26 ++++++++++++++++++++++++++
 lua/noice/view/nui.lua | 22 ++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/lua/noice/util/nui.lua b/lua/noice/util/nui.lua
index 66b36fd..3d4bee0 100644
--- a/lua/noice/util/nui.lua
+++ b/lua/noice/util/nui.lua
@@ -30,6 +30,32 @@ function M.normalize_win_options(opts)
   end
 end
 
+---@return {xmin:integer, xmax:integer, ymin:integer, ymax:integer}
+function M.bounds(win)
+  local pos = vim.api.nvim_win_get_position(win)
+  local height = vim.api.nvim_win_get_height(win)
+  local width = vim.api.nvim_win_get_width(win)
+  return {
+    xmin = pos[2],
+    xmax = pos[2] + width,
+    ymin = pos[1],
+    ymax = pos[1] + height,
+  }
+end
+
+function M.overlap(win1, win2)
+  local b1 = M.bounds(win1)
+  local b2 = M.bounds(win2)
+
+  if b2.xmin > b1.xmax or b1.xmin > b2.xmax then
+    return false
+  end
+  if b2.ymin > b1.ymax or b1.ymin > b2.ymax then
+    return false
+  end
+  return true
+end
+
 ---@param opts? NuiPopupOptions
 ---@return _.NuiPopupOptions
 function M.normalize_popup_options(opts)
diff --git a/lua/noice/view/nui.lua b/lua/noice/view/nui.lua
index 09a60bb..e762823 100644
--- a/lua/noice/view/nui.lua
+++ b/lua/noice/view/nui.lua
@@ -43,6 +43,27 @@ function NuiView:update_options()
   self._opts = Util.nui.normalize(self._opts)
 end
 
+-- Check if other floating windows are overlapping and move out of the way
+function NuiView:smart_move()
+  if not (self._opts.type == "popup" and self._opts.relative and self._opts.relative.type == "editor") then
+    return
+  end
+
+  local wins = vim.tbl_filter(function(win)
+    return win ~= self._nui.winid
+      and not (self._nui.border and self._nui.border.winid == win)
+      and vim.api.nvim_win_is_valid(win)
+      and vim.api.nvim_win_get_config(win).relative == "editor"
+      and Util.nui.overlap(self._nui.winid, win)
+  end, vim.api.nvim_list_wins())
+
+  if #wins > 0 then
+    local layout = self:get_layout()
+    layout.position.row = 2
+    self._nui:update_layout(layout)
+  end
+end
+
 function NuiView:create()
   if self._loading then
     return
@@ -165,6 +186,7 @@ function NuiView:show()
   self._nui:show()
   if not self._visible then
     self._nui:update_layout(self:get_layout())
+    self:smart_move()
   end
 
   self:tag()