Visual indents and indent navigation

This is useful for Yaml ... maybe I should make it only available in
YAML files?

ha-programming-ansible.org

@@ -29,6 +29,69 @@ My day job now involves a lot of Ansible, and I’ve been struggling to get the
 
 Much of the conflict stems from whether to use [[file:ha-programming.org::*Tree Sitter][Tree Sitter]] for the YAML mode or not.
 
+* Visual Indentation
+Moving by lines is our default navigation mode, but for Yaml and Python, that doesn’t have s-expressions, we need something to move around by blocks. The [[https://codeberg.org/ideasman42/emacs-spatial-navigate][spatial navigation]] project attempts to address this. The problem is how to bind the functions.
+
+The obvious keybindings are ~M-h/j/k/l~ … but that is used … well, somewhat. In org files, this is a way to move the outline of subtrees around. Useful, and =spatial-navigate= wouldn’t be helpful in org files anyway.
+
+#+begin_src emacs-lisp
+  (use-package spatial-navigate
+    :straight (:repo "https://codeberg.org/ideasman42/emacs-spatial-navigate")
+    :config
+    ;; Normal State movement has a number of conflict in other mode maps, for instance:
+    ;; Overrides: `kill-sentence'
+    (define-key evil-normal-state-map (kbd "M-k") 'spatial-navigate-backward-vertical-box)
+    ;; Overrides: `default-indent-new-line'
+    (define-key evil-normal-state-map (kbd "M-j") 'spatial-navigate-forward-vertical-box)
+    ;; Overrides: `beginning-of-defun'
+    (define-key evil-normal-state-map (kbd "M-h") 'spatial-navigate-backward-horizontal-box)
+    ;; Overrides my: `beginning-of-next-defun'
+    (define-key evil-normal-state-map (kbd "M-l") 'spatial-navigate-forward-horizontal-box)
+
+    ;; Overrides: `indent-for-tab-command' (not good for normal state)
+    (define-key evil-normal-state-map (kbd "<backtab>") 'spatial-navigate-backward-horizontal-bar)
+    (define-key evil-normal-state-map (kbd "<tab>") 'spatial-navigate-forward-horizontal-bar))
+#+end_src
+
+The [[https://github.com/antonj/Highlight-Indentation-for-Emacs][Highlight-Indentation]] project highlights each of the indent levels, which could be helpful for these modes:
+
+#+begin_src emacs-lisp
+  (use-package highlight-indentation
+    :straight (:host github :repo "antonj/Highlight-Indentation-for-Emacs")
+    :hook ((yaml-mode . highlight-indentation-mode)
+           (yaml-ts-mode . highlight-indentation-mode)
+           (python-mode . highlight-indentation-mode)))
+#+end_src
+
+This project has another display feature, which just lines up the current level. So I’ve created a toggle for this:
+
+#+begin_src emacs-lisp
+  (use-package highlight-indentation
+    :config
+    (setq highlight-indentation-blank-lines t)
+    (set-face-background 'highlight-indentation-face "#332c26")
+    (set-face-background 'highlight-indentation-current-column-face "#66615c")
+
+    (defun ha-toggle-highlight-indentation ()
+      "Toggles through the indentation modes."
+      (interactive)
+      (cond
+       (highlight-indentation-mode
+        (progn
+          (highlight-indentation-mode -1)
+          (highlight-indentation-current-column-mode 1)))
+       (highlight-indentation-current-column-mode
+        (progn
+          (highlight-indentation-mode -1)
+          (highlight-indentation-current-column-mode -1)))
+       (t
+        (progn
+          (highlight-indentation-mode 1)
+          (highlight-indentation-current-column-mode -1)))))
+
+    (ha-leader "t i" '("show indents" . ha-toggle-highlight-indentation)))
+#+end_src
+
 * YAML
 Doing a lot of [[https://github.com/yoshiki/yaml-mode][YAML work]], but  the =yaml-mode= project needs a new maintainer, so I might as well switch over to the T version.
 , so I’ve switch to [[https://github.com/zkry/yaml-pro][yaml-pro]] that is now based on Tree Sitter. Let’s make sure the Tree-Sitter version works: