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Diffstat (limited to 'modules/eat-config.el')
| -rw-r--r-- | modules/eat-config.el | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/modules/eat-config.el b/modules/eat-config.el index 7f3eab69f..d08fb91e6 100644 --- a/modules/eat-config.el +++ b/modules/eat-config.el @@ -20,6 +20,7 @@ ;;; Code: +(require 'keybindings) (require 'cj-window-geometry-lib) (require 'cj-window-toggle-lib) @@ -226,5 +227,200 @@ terminal. ai-term's ghostel agent buffers are managed separately via M-SPC." (keymap-global-set "<f12>" #'cj/term-toggle) +;; ------------------- terminal copy mode + tmux history ----------------------- +;; Carried over from the ghostel era for the EAT agent terminals (ai-term). +;; Agents run EAT over tmux, so copy-mode is tmux's own copy-mode -- the same UX +;; ghostel-over-tmux had. C-<up> enters it and scrolls up in one stroke; C-; x c +;; enters it via the menu, and C-; x h grabs the whole pane history into a buffer. + +(declare-function cj/register-prefix-map "keybindings") +(declare-function eat-emacs-mode "eat") +(defvar eat--semi-char-mode) +(defvar eat--char-mode) +(defvar eat--line-mode) + +(defun cj/--term-send-string (string) + "Send STRING to the current terminal buffer's process (the pty)." + (let ((proc (get-buffer-process (current-buffer)))) + (when (process-live-p proc) + (process-send-string proc string)))) + +(defun cj/term--tmux-output (&rest args) + "Run tmux with ARGS and return its stdout. +Signal `user-error' when tmux exits with a non-zero status." + (with-temp-buffer + (let ((exit-code (apply #'process-file "tmux" nil t nil args))) + (unless (zerop exit-code) + (user-error "tmux failed: %s" (string-trim (buffer-string)))) + (buffer-string)))) + +(defun cj/term--tmux-pane-id-for-tty (tty) + "Return the tmux pane id for client TTY." + (let* ((output (cj/term--tmux-output + "list-clients" "-F" "#{client_tty}\t#{pane_id}")) + (lines (split-string output "\n" t)) + (match (seq-find + (lambda (line) + (let ((fields (split-string line "\t"))) + (equal (car fields) tty))) + lines))) + (unless match + (user-error "No tmux client found for terminal tty %s" tty)) + (cadr (split-string match "\t")))) + +(defun cj/term--tmux-capture-pane (pane-id) + "Return full joined tmux history for PANE-ID." + (cj/term--tmux-output + "capture-pane" "-p" "-J" "-S" "-" "-E" "-" "-t" pane-id)) + +(defun cj/term--current-tmux-pane-id () + "Return the tmux pane id for the current EAT terminal buffer." + (unless (derived-mode-p 'eat-mode) + (user-error "Current buffer is not an EAT terminal")) + (let* ((proc (get-buffer-process (current-buffer))) + (tty (and proc (process-tty-name proc)))) + (unless (and tty (not (string-empty-p tty))) + (user-error "Could not determine terminal tty")) + (cj/term--tmux-pane-id-for-tty tty))) + +(defvar-local cj/term-tmux-history--origin-buffer nil + "Buffer active before opening the tmux history buffer.") +(defvar-local cj/term-tmux-history--origin-window nil + "Window active before opening the tmux history buffer.") +(defvar-local cj/term-tmux-history--origin-point nil + "Point in the origin buffer before opening the tmux history buffer.") + +(defun cj/term-tmux-history-quit () + "Quit tmux history and return to its origin buffer." + (interactive) + (let ((history-buffer (current-buffer)) + (origin-buffer cj/term-tmux-history--origin-buffer) + (origin-window cj/term-tmux-history--origin-window) + (origin-point cj/term-tmux-history--origin-point)) + (when (buffer-live-p origin-buffer) + (if (window-live-p origin-window) + (progn + (set-window-buffer origin-window origin-buffer) + (select-window origin-window)) + (pop-to-buffer origin-buffer)) + (with-current-buffer origin-buffer + (when (integer-or-marker-p origin-point) + (goto-char origin-point)))) + (when (buffer-live-p history-buffer) + (kill-buffer history-buffer)))) + +(defvar-keymap cj/term-tmux-history-mode-map + :doc "Keymap for `cj/term-tmux-history-mode'. +M-w copies the active region without leaving the buffer; C-g, <escape>, or q +returns to the terminal without copying. RET is left unbound." + "M-w" #'kill-ring-save + "C-g" #'cj/term-tmux-history-quit + "<escape>" #'cj/term-tmux-history-quit + "q" #'cj/term-tmux-history-quit) + +(define-derived-mode cj/term-tmux-history-mode special-mode "Tmux History" + "Mode for copying captured tmux pane history with normal Emacs keys." + (setq-local truncate-lines t) + (goto-address-mode 1)) + +(defun cj/term-tmux-history () + "Open full tmux pane history in a temporary Emacs buffer. + +The history buffer uses normal Emacs navigation and selection. `M-w' copies +the active region and stays open, so several pieces can be copied in a row; +`q', `<escape>', or `C-g' returns point to the terminal buffer that launched +it. The history view replaces the origin terminal buffer in the same window." + (interactive) + (let* ((origin-buffer (current-buffer)) + (origin-window (selected-window)) + (origin-point (point)) + (pane-id (cj/term--current-tmux-pane-id)) + (history (cj/term--tmux-capture-pane pane-id)) + (buffer (get-buffer-create + (format "*terminal tmux history: %s*" (buffer-name origin-buffer))))) + (with-current-buffer buffer + (let ((inhibit-read-only t)) + (erase-buffer) + (insert history)) + (cj/term-tmux-history-mode) + (setq-local cj/term-tmux-history--origin-buffer origin-buffer) + (setq-local cj/term-tmux-history--origin-window origin-window) + (setq-local cj/term-tmux-history--origin-point origin-point) + (goto-char (point-max))) + (switch-to-buffer buffer))) + +(defun cj/term--in-tmux-p () + "Return non-nil when the current EAT buffer has a tmux client attached. +Lookup errors (not eat-mode, no tty, no client, tmux absent) are treated as +nil so callers can use this as a cheap boolean predicate." + (and (derived-mode-p 'eat-mode) + (condition-case _ + (and (cj/term--current-tmux-pane-id) t) + (error nil)))) + +(defun cj/--term-in-emacs-mode-p () + "Return non-nil when the current EAT buffer is in emacs (navigation) mode. +EAT has no dedicated emacs-mode flag; emacs mode is the absence of the +semi-char, char, and line input modes." + (and (derived-mode-p 'eat-mode) + (not (or (bound-and-true-p eat--semi-char-mode) + (bound-and-true-p eat--char-mode) + (bound-and-true-p eat--line-mode))))) + +(defun cj/term-copy-mode-dwim () + "Enter copy-mode using the engine appropriate to this terminal. + +When tmux is attached (an agent terminal), write tmux's prefix sequence (C-b [) +into the pty so the user lands in tmux's copy-mode with the full pane history, +then C-a to land the cursor at column 0 so scrolling up runs up the left edge. +Without tmux, falls through to EAT's emacs mode (a navigable view of the +scrollback) and moves point to the start of the line." + (interactive) + (if (cj/term--in-tmux-p) + (cj/--term-send-string "\C-b[\C-a") + (eat-emacs-mode) + (beginning-of-line))) + +(defun cj/term--tmux-pane-in-copy-mode-p (pane-id) + "Return non-nil when tmux PANE-ID is currently displaying a mode. +tmux's `pane_in_mode' is 1 while a pane is in any mode; copy-mode is the only +mode this config enters. tmux failures are treated as nil." + (condition-case nil + (equal "1" (string-trim + (cj/term--tmux-output + "display-message" "-p" "-t" pane-id "#{pane_in_mode}"))) + (error nil))) + +(defun cj/term-copy-mode-up () + "Enter copy-mode if needed, then scroll up one line. +A single C-<up> lands in the terminal's copy-mode already moving up. Pressed +again while already in copy-mode it just moves up another line, so it never +re-enters and resets the cursor. In tmux, writes the up-arrow escape into the +pty; without tmux, moves point up in EAT's emacs-mode buffer." + (interactive) + (let ((pane (ignore-errors (cj/term--current-tmux-pane-id)))) + (cond + (pane + (unless (cj/term--tmux-pane-in-copy-mode-p pane) + (cj/term-copy-mode-dwim)) + (cj/--term-send-string "\e[A")) + (t + (unless (cj/--term-in-emacs-mode-p) + (cj/term-copy-mode-dwim)) + (forward-line -1))))) + +;; The C-; x terminal prefix (copy-mode, tmux history, the F12 toggle). C-<up> +;; enters copy-mode + scrolls in one stroke; bound in EAT's semi-char map so it +;; reaches Emacs from inside an agent terminal. +(defvar-keymap cj/term-map + :doc "Personal terminal command map.") +(cj/register-prefix-map "x" cj/term-map) +(keymap-set cj/term-map "c" #'cj/term-copy-mode-dwim) +(keymap-set cj/term-map "h" #'cj/term-tmux-history) +(keymap-set cj/term-map "t" #'cj/term-toggle) + +(with-eval-after-load 'eat + (keymap-set eat-semi-char-mode-map "C-<up>" #'cj/term-copy-mode-up)) + (provide 'eat-config) ;;; eat-config.el ends here |