fix(treesitter): find buffer in multiple windows #28922

Problem:
1. When interacting with multiple :InspectTree and the source buffer
   windows there is a high chance of errors due to the window ids not
   being updated and validated.
2. Not all InspectTree windows were closed when the source buffer was
   closed.

Solution:
1. Update InspectTree window id on `CursorMoved` event and validate
   source buffer window id before trying to navigate to it.
2. Close all InspectTree windows

1 files changed, 53 insertions, 0 deletions

diff --git a/test/functional/treesitter/inspect_tree_spec.lua b/test/functional/treesitter/inspect_tree_spec.lua
index f5acfe7c4a..b403cca735 100644
--- a/test/functional/treesitter/inspect_tree_spec.lua
+++ b/test/functional/treesitter/inspect_tree_spec.lua
@@ -114,4 +114,57 @@ describe('vim.treesitter.inspect_tree', function()
             (fenced_code_block_delimiter)))) ; [2, 0] - [2, 3] markdown
       ]]
   end)
+
+  it('updates source and tree buffer windows and closes them correctly', function()
+    insert([[
+      print()
+      ]])
+
+    -- setup two windows for the source buffer
+    exec_lua([[
+      source_win = vim.api.nvim_get_current_win()
+      vim.api.nvim_open_win(0, false, {
+        win = 0,
+        split = 'left'
+      })
+    ]])
+
+    -- setup three windows for the tree buffer
+    exec_lua([[
+      vim.treesitter.start(0, 'lua')
+      vim.treesitter.inspect_tree()
+      tree_win = vim.api.nvim_get_current_win()
+      tree_win_copy_1 = vim.api.nvim_open_win(0, false, {
+        win = 0,
+        split = 'left'
+      })
+      tree_win_copy_2 = vim.api.nvim_open_win(0, false, {
+        win = 0,
+        split = 'left'
+      })
+    ]])
+
+    -- close original source window
+    exec_lua('vim.api.nvim_win_close(source_win, false)')
+
+    -- navigates correctly to the remaining source buffer window
+    feed('<CR>')
+    eq('', n.api.nvim_get_vvar('errmsg'))
+
+    -- close original tree window
+    exec_lua([[
+       vim.api.nvim_set_current_win(tree_win_copy_1)
+       vim.api.nvim_win_close(tree_win, false)
+    ]])
+
+    -- navigates correctly to the remaining source buffer window
+    feed('<CR>')
+    eq('', n.api.nvim_get_vvar('errmsg'))
+
+    -- close source buffer window and all remaining tree windows
+    t.pcall_err(exec_lua, 'vim.api.nvim_win_close(0, false)')
+
+    eq(false, exec_lua('return vim.api.nvim_win_is_valid(tree_win_copy_1)'))
+    eq(false, exec_lua('return vim.api.nvim_win_is_valid(tree_win_copy_2)'))
+  end)
 end)