91 lines
3.1 KiB
Org Mode
91 lines
3.1 KiB
Org Mode
#+TITLE: Passepartout TUI — View
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#+PROPERTY: header-args:lisp :tangle ../lisp/gateway-tui-view.lisp
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* View
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Pure render functions. Each takes a Croatoan window and current state.
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State is read via ~(st :key)~ — no mutation here.
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** Contract
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1. (view-status win): renders the status bar with connection info,
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version, and timestamp.
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2. (view-chat win): renders the scrolled chat message list. Messages
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are color-coded: green (user), white (agent), yellow (system).
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3. (view-input win): renders the input line with cursor and typing
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indicator.
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4. (redraw scr chat-win status-win input-win): dispatches redraws
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based on ~(st :dirty)~ flags. Minimizes terminal writes.
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** Status Bar
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#+begin_src lisp
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(in-package :passepartout.gateway-tui)
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(defun view-status (win)
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(clear win)
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(box win 0 0)
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(add-string win
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(format nil " Passepartout ~a [~a] msgs:~a scroll:~a"
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(if (st :connected) "● Connected" "○ Disconnected")
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(string-upcase (string (st :mode)))
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(length (st :messages))
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(if (> (st :scroll-offset) 0) (format nil "~a↑" (st :scroll-offset)) "0"))
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:y 1 :x 1 :fgcolor (if (st :connected) :green :red))
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(add-string win (format nil " ~a" (now)) :y 2 :x 1 :fgcolor :yellow)
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(refresh win))
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#+end_src
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** Chat Area
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#+begin_src lisp
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(defun view-chat (win h)
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(clear win)
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(box win 0 0)
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(let* ((w (or (width win) 78))
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(msgs (reverse (st :messages)))
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(max-lines (- h 2))
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(total (length msgs))
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(start (max 0 (- total max-lines (st :scroll-offset))))
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(y 1))
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(loop for i from start below total
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while (< y (1- h))
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do (let ((msg (nth i msgs)))
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(let* ((role (getf msg :role))
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(content (getf msg :content))
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(time (or (getf msg :time) ""))
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(label (case role
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(:user (format nil "⬆ [~a] ~a" time content))
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(:agent (format nil "⬇ [~a] ~a" time content))
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(:system (format nil " [~a] ~a" time content))
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(t (format nil " [~a] ~a" time content))))
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(color (case role
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(:user :green)
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(:agent :white)
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(:system :yellow)
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(t :white))))
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(add-string win label :y y :x 1 :n (1- w) :fgcolor color)
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(incf y)))))
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(refresh win))
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#+end_src
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** Input Line
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#+begin_src lisp
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(defun view-input (win)
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(let* ((text (input-string))
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(w (or (width win) 78))
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(clip (min (length text) (1- w))))
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(clear win)
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(add-string win (format nil "~a " text) :y 0 :x 0 :n (1- w) :fgcolor :cyan)
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(setf (cursor-position win) (list 0 clip)))
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(refresh win))
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#+end_src
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** Redraw (dirty-flag dispatch)
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#+begin_src lisp
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(defun redraw (sw cw ch iw)
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(destructuring-bind (sd cd id) (st :dirty)
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(when sd (view-status sw))
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(when cd (view-chat cw ch))
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(when id (view-input iw))
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(setf (st :dirty) (list nil nil nil))))
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#+end_src
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