diff options
Diffstat (limited to 'tools/emacs-pkgs/niri/niri.el')
| -rw-r--r-- | tools/emacs-pkgs/niri/niri.el | 106 |
1 files changed, 91 insertions, 15 deletions
diff --git a/tools/emacs-pkgs/niri/niri.el b/tools/emacs-pkgs/niri/niri.el index 3a4521174329..62c2b712cde2 100644 --- a/tools/emacs-pkgs/niri/niri.el +++ b/tools/emacs-pkgs/niri/niri.el @@ -45,15 +45,24 @@ (defun niri-list-windows () "List all currently open Niri windows." (json-parse-string - (shell-command-to-string "niri msg -j windows"))) + (shell-command-to-string "niri msg -j windows") + :false-object nil)) + +(defun niri--window-is-emacs (window) + (equal (map-elt window "app_id") "emacs")) (defun niri--list-selectables () "Lists all currently selectable things in a format that can work -with completing-read. Selectable means all open Niri windows and -all Emacs buffers." - (let* (;; all niri windows except for emacs frames - (windows (seq-filter (lambda (w) (not (equal (map-elt w "app_id") "emacs"))) - (niri-list-windows))) +with completing-read. Selectable means all open Niri +windows (except Emacs windows) and all Emacs buffers. + +Emacs windows are returned separately, as they are required for +frame navigation." + (let* (;; all niri windows, with emacs/non-emacs windows split up + (all-windows (niri-list-windows)) + (windows (seq-filter (lambda (w) (not (niri--window-is-emacs w))) + all-windows)) + (emacs-windows (seq-filter #'niri--window-is-emacs all-windows)) ;; all non-hidden buffers (buffers (seq-filter (lambda (b) (not (string-prefix-p " " (buffer-name b)))) @@ -69,14 +78,27 @@ all Emacs buffers." (map-put! selectables (buffer-name buf) (cons :emacs buf))) buffers) + (cons selectables emacs-windows))) + +(defun niri--focus-window (window) + (shell-command (format "niri msg action focus-window --id %d" + (map-elt window "id")))) - selectables)) +(defun niri--target-action-internal (target) + "Focus the given TARGET (a Niri window or Emacs buffer). This is +used when called from inside of Emacs. It will NOT correctly +switch Niri windows when called from outside of Emacs." + (pcase (car target) + (:emacs (pop-to-buffer (cdr target) '((display-buffer-reuse-window + display-buffer-same-window) + (reusable-frames . 0)))) + (:niri (niri--focus-window (cdr target))))) (defun niri-go-anywhere () "Interactively select and switch to an open Niri window, or an Emacs buffer." (interactive) - (let* ((selectables (niri--list-selectables)) + (let* ((selectables (car (niri--list-selectables))) ;; Annotate buffers that display remote files. I frequently ;; want to see it, because I might have identically named ;; files open locally and remotely at the same time, and it @@ -95,10 +117,64 @@ all Emacs buffers." (target-key (completing-read "Switch to: " (map-keys selectables))) (target (map-elt selectables target-key))) - (pcase (car target) - (:emacs (pop-to-buffer (cdr target) '((display-buffer-reuse-window - display-buffer-same-window) - (reusable-frames . 0)))) - (:niri - (shell-command (format "niri msg action focus-window --id %d" - (map-elt (cdr target) "id"))))))) + (niri--target-action-internal target))) + + +(defun niri--target-action-external (target frames) + "Focus the given TARGET (a Niri window or Emacs buffer). This +always behaves correctly, but does more work than the -internal +variant. It should only be called when invoking the switcher from +outside of Emacs (i.e. through `emacsclient'). + +FRAMES is the exact list of Emacs frames that existed at the time +the switcher was invoked." + (pcase (car target) + (:niri (niri--focus-window (cdr target))) + + ;; When switching to an Emacs buffer from outside of Emacs, we run into the + ;; additional complication that Wayland does not allow arbitrary + ;; applications to change the focused window. Calling e.g. + ;; `select-frame-set-input-focus' has no effect on Wayland when not called + ;; from within a focused Emacs frame. + ;; + ;; However, due to concurrency, frames may change between the moment when we + ;; start the switcher (and potentially wait for user input), and when the + ;; final selection happens. + ;; + ;; To get around this we try to match the target Emacs frame (if present) to + ;; a Niri window, switch to it optimistically, and *then* execute the final + ;; buffer switching command. + (:emacs + (if-let ((window (get-buffer-window (cdr target) t)) + (frame (window-frame window)) + (frame-name (frame-parameter frame 'name)) + (niri-window (seq-find (lambda (w) + (equal (map-elt w "title") frame-name)) + frames))) + ;; Target frame found and could be matched to a Niri window: Go there! + (progn (select-window window) ;; ensure the right window in the frame has focus + (niri--focus-window niri-window) + (message "Switched to existing window for \"%s\"" (buffer-name (cdr target)))) + + ;; Target frame not found; is Emacs the focused program? + (if (seq-find (lambda (w) (map-elt w "is_focused")) frames) + (switch-to-buffer (cdr target)) + ;; if not, just make a new frame + (display-buffer (cdr target) '(display-buffer-pop-up-frame))))))) + +(defun niri-go-anywhere-external () + "Use a dmenu-compatible launcher like `fuzzel' to achieve the same +effect as `niri-go-anywhere', but from outside of Emacs through +Emacsclient." + (interactive) ;; TODO no? + (let* ((all (niri--list-selectables)) + (selectables (car all)) + (target (with-temp-buffer + (dolist (key (map-keys selectables)) + (insert key "\n")) + (call-process-region nil nil "fuzzel" t t nil "-d") + (string-trim (buffer-string))))) + (unless (string-empty-p target) + (niri--target-action-external (map-elt selectables target) (cdr all))))) + +(provide 'niri) |