Amr Gharbeia
9350cb855e
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Adds :cursor-pos to TUI state. New functions: - input-insert-char(ch): insert at cursor position, advance cursor - input-delete-char(): delete char before cursor (standard backspace) on-key handlers: - Left arrow: decrement cursor-pos (clamped >= 0) - Right arrow: increment cursor-pos (clamped <= buffer-len) - Character input: input-insert-char at cursor position - Backspace: input-delete-char at cursor position - Enter: reset cursor-pos to 0 view-input: cursor at visual position matching cursor-pos Test: (init-state) → (input-insert-char #\h) → (input-insert-char #\i) → (setf cursor-pos 1) → (input-insert-char #\X) → 'hXi' at pos 2
5.4 KiB
5.4 KiB
Passepartout TUI — View
View
Pure render functions. Each takes a Croatoan window and current state.
State is read via (st :key) — no mutation here.
Contract
- (view-status win): renders the status bar with connection info, version, and timestamp.
- (view-chat win h): renders the scrolled chat message list. Takes window and available height. Messages are color-coded: green (user), white (agent), yellow (system).
- (view-input win): renders the input line with cursor and typing indicator.
- (redraw sw cw ch iw): dispatches redraws based on
(st :dirty)flags (status, chat, input). Minimizes terminal writes.
Status Bar
(in-package :passepartout.gateway-tui)
(defun view-status (win)
(clear win)
(box win 0 0)
(add-string win
(format nil " Passepartout ~a [~a] msgs:~a scroll:~a~a"
(if (st :connected) "● Connected" "○ Disconnected")
(string-upcase (string (st :mode)))
(length (st :messages))
(if (> (st :scroll-offset) 0) (format nil "~a↑" (st :scroll-offset)) "0")
(if (st :busy) " …thinking" ""))
:y 1 :x 1 :fgcolor (theme-color (if (st :connected) :connected :disconnected)))
(add-string win (format nil " ~a" (now)) :y 2 :x 1 :fgcolor (theme-color :timestamp))
(refresh win))Chat Area
(defun word-wrap (text width)
"Break text into lines at word boundaries, each <= width chars.
Returns list of trimmed strings. Single words wider than width are split."
(let ((lines '())
(pos 0)
(len (length text)))
(loop while (< pos len)
do (let ((end (min len (+ pos width))))
(cond
((>= end len)
(push (string-trim '(#\Space) (subseq text pos len)) lines)
(setf pos len))
((char= (char text (1- end)) #\Space)
(push (string-trim '(#\Space) (subseq text pos end)) lines)
(setf pos end))
(t
(let ((last-space (position #\Space text :from-end t :end (1+ end) :start pos)))
(if (and last-space (> last-space pos))
(progn
(push (string-trim '(#\Space) (subseq text pos last-space)) lines)
(setf pos (1+ last-space)))
(progn
(push (string-trim '(#\Space) (subseq text pos end)) lines)
(setf pos end))))))))
(nreverse lines)))
(defun view-chat (win h)
(clear win)
(box win 0 0)
(let* ((w (or (width win) 78))
(msgs (reverse (st :messages)))
(max-lines (- h 2))
(y 1))
;; Count visible messages from end, accounting for word wrap
(let* ((msg-count 0)
(lines-remaining max-lines))
;; Walk from most recent backwards, counting wrapped lines
(let ((visible-msgs (reverse msgs)))
(loop for msg in visible-msgs
while (> lines-remaining 0)
do (let* ((role (getf msg :role))
(content (getf msg :content))
(time (or (getf msg :time) ""))
(prefix (case role (:user "⬆") (:agent "⬇") (t " ")))
(line-text (format nil "~a [~a] ~a" prefix time content))
(wrapped (word-wrap line-text (- w 2)))
(nlines (length wrapped)))
(if (<= nlines lines-remaining)
(progn (decf lines-remaining nlines) (incf msg-count))
(setf lines-remaining 0))))
;; Render from the correct starting message
(let* ((total (length msgs))
(scroll-skip (st :scroll-offset))
(start (max 0 (- total msg-count scroll-skip))))
(loop for i from start below total
while (< y (1- h))
do (let* ((msg (nth i msgs))
(role (getf msg :role))
(content (getf msg :content))
(time (or (getf msg :time) ""))
(color (theme-color (case role (:user :user) (:agent :agent) (:system :system) (t :agent))))
(prefix (case role (:user "⬆") (:agent "⬇") (t " ")))
(line-text (format nil "~a [~a] ~a" prefix time content))
(wrapped (word-wrap line-text (- w 2))))
(dolist (line wrapped)
(when (< y (1- h))
(add-string win line :y y :x 1 :n (1- w) :fgcolor color)
(incf y)))))))))
(refresh win))Input Line
(defun view-input (win)
(let* ((text (input-string))
(w (or (width win) 78))
(pos (or (st :cursor-pos) 0))
(display-start (max 0 (- pos (1- w))))
(visible (subseq text display-start (min (length text) (+ display-start w)))))
(clear win)
(add-string win (format nil "~a " visible) :y 0 :x 0 :n (1- w) :fgcolor (theme-color :input))
(setf (cursor-position win) (list 0 (min (- pos display-start) (1- w)))))
(refresh win))Redraw (dirty-flag dispatch)
(defun redraw (sw cw ch iw)
(destructuring-bind (sd cd id) (st :dirty)
(when sd (view-status sw))
(when cd (view-chat cw ch))
(when id (view-input iw))
(setf (st :dirty) (list nil nil nil))))