Files
cl-tty/org/dialog.org
Amr Gharbeia 94df17a7b9 Add render-select-minibuffer, fix CSI parser nil-code crash
- render-select-minibuffer: new function for bottom-anchored dialog
  panel (minibuffer style), accepts colors plist for theme integration
- handle-text-input: guard code-char against nil key-event-code
  to prevent crash on CSI escape sequences (arrow keys)
2026-05-20 16:27:53 -04:00

824 lines
28 KiB
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#+TITLE: Dialog System + Toast (v0.9.0)
#+DATE: 2026-05-11
#+AUTHOR: Amr Gharbeia / Hermes
* Overview
Modal overlays (dialogs) and transient notifications (toasts).
Dialogs are absolute-positioned panels centered on a dimmed backdrop.
They stack — a new dialog goes on top, Esc dismisses the top one.
Toasts are non-blocking notifications that auto-dismiss after a
duration. They stack in the top-right corner.
** Design decisions
1. /Stack-based dialog management/: a ~*dialog-stack*~ special variable
holds the active dialogs. Render walks the stack from bottom to top,
drawing each dialog's backdrop over the previous one. This means two
dialogs visible at once — the top one gets full interaction.
2. /Backdrop is a solid dim color, not semi-transparent/: true
transparency requires compositing pixel buffers, which is expensive
in the terminal. A solid dimmed color over the full screen width
communicates "modal" without the complexity.
3. /Dialogs are components, not separate windows/: they integrate into
the existing render tree. The dialog class inherits from the component
base and participates in dirty tracking, z-order, etc.
4. /Toast is fire-and-forget/: ~(toast ...)~ creates a toast component,
adds it to a toast list, and schedules auto-dismissal. No lifecycle
management needed from the caller.
** Contract
- ~dialog~ class — overlay component with backdrop, border, title
- ~*dialog-stack*~ — list of active dialogs (bound per-screen)
- ~push-dialog dialog~ — add dialog to stack, focus its first input
- ~pop-dialog~ — dismiss top dialog, fire :on-dismiss
- ~(alert-dialog title message)~ — OK-button alert
- ~(confirm-dialog title message &key on-yes on-no)~ — Yes/No/Cancel
- ~(select-dialog title options &key on-select)~ — modal Select
- ~(prompt-dialog title &key on-submit)~ — modal TextInput
- ~toast~ component — transient notification with variant color
- ~(toast message &key variant duration)~ — fire-and-forget toast
* Package definition
The ~cl-tty.dialog~ package uses the backend, input, and select
subsystems. All public symbols are exported for user convenience.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog-package.lisp
;;; dialog-package.lisp — Package definition for cl-tty.dialog
(defpackage :cl-tty.dialog
(:use :cl :cl-tty.backend :cl-tty.input :cl-tty.box :cl-tty.layout)
(:export
;; Dialog
#:dialog
#:dialog-title
#:dialog-content
#:dialog-on-dismiss
#:dialog-size
#:dialog-size-pixels
#:render-dialog
#:render-select-minibuffer
#:push-dialog
#:pop-dialog
#:*dialog-stack*
#:alert-dialog
#:confirm-dialog
#:select-dialog
#:prompt-dialog
;; Toast
#:toast
#:toast-message
#:toast-variant
#:render-toast
#:dismiss-toast
#:*toasts*
;; Select widget (merged from cl-tty.select)
#:select #:make-select
#:select-options #:select-filter
#:select-selected-index #:select-on-select
#:select-layout-node
#:select-filtered-options
#:select-next #:select-prev
#:select-visible-options
#:select-handle-key
#:render
#:fuzzy-match-p))
#+END_SRC
* Special variables
** *dialog-stack*
The active dialog stack. ~push-dialog~ conses onto this list;
~pop-dialog~ pops it and fires the ~:on-dismiss~ callback. Each screen
should bind its own instance so multiple screens can have independent
dialog states.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(in-package :cl-tty.dialog)
(defvar *dialog-stack* nil
"Stack of active dialogs. (list) of dialog instances.")
#+END_SRC
** *toasts*
List of active toast notifications. ~toast~ pushes, ~dismiss-toast~
removes by identity. The render loop walks this list to draw toasts in
the top-right corner.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defvar *toasts* nil
"List of active toast notifications.")
#+END_SRC
* Dialog class
The core dialog class stores a title, a size preset, the content
component to render inside the panel, and an optional ~:on-dismiss~
callback invoked when the dialog is popped.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defclass dialog ()
((title :initarg :title :accessor dialog-title)
(size :initarg :size :initform :medium :accessor dialog-size)
(content :initarg :content :initform nil :accessor dialog-content)
(on-dismiss :initarg :on-dismiss :initform nil :accessor dialog-on-dismiss)))
#+END_SRC
** dialog-size-pixels
Converts a size keyword (~:small~, ~:medium~, ~:large~) to pixel
dimensions. Accepts optional ~max-w~ / ~max-h~ to clamp the result to
terminal bounds, preventing off-screen overflow (fixed in v1.0.0).
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun dialog-size-pixels (size &optional (max-w 80) (max-h 24))
(multiple-value-bind (dw dh)
(case size
(:small (values 40 8))
(:medium (values 60 16))
(:large (values 88 24))
(t (values 60 16)))
(values (min dw max-w) (min dh max-h))))
#+END_SRC
** render-dialog
Renders a dialog: draws a dimmed full-screen backdrop using
~draw-rect~, then draws the bordered dialog panel centered on screen.
Content is rendered via ~draw-text~ inside the panel area.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun render-dialog (dialog screen w h)
(multiple-value-bind (dw dh) (dialog-size-pixels (dialog-size dialog) w h)
(let ((x (floor (- w dw) 2))
(y (floor (- h dh) 2)))
;; Backdrop — dim the full screen
(dotimes (row h)
(draw-rect screen 0 row w 1 :bg :bright-black))
;; Dialog panel
(draw-border screen x y dw dh :style :single :title (dialog-title dialog))
(when (dialog-content dialog)
;; Content rendering delegated to component system
(draw-text screen (1+ x) (1+ y)
(format nil "~a" (dialog-content dialog))
:white :default)))))
#+END_SRC
** render-select-minibuffer
Renders a ~select~ widget as a bottom-anchored minibuffer panel at the
given position. The panel fills a rectangular area, draws a separator
line with the title at the top, the filtered options in the middle,
and a filter input line (>= ~...~) at the bottom. ~colors~ is a plist
with keys ~:bg-panel~, ~:separator~, ~:accent~, ~:text-muted~,
~:agent-fg~, ~:input-fg~, ~:bg-input~, ~:input-prompt~.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun render-select-minibuffer (be x y width height select title colors)
(let* ((filtered (select-filtered-options select))
(sel-idx (or (select-selected-index select) 0))
(filter (select-filter select))
(bg-p (getf colors :bg-panel))
(sep-c (getf colors :separator)))
(dotimes (r height)
(draw-rect be x (+ y r) width 1 :bg bg-p))
(draw-text be x y (make-string width :initial-element #\─) sep-c bg-p)
(draw-text be (1+ x) y title (getf colors :accent) bg-p)
(loop for item in filtered
for i from 1
for display-idx = (first item)
for option = (third item)
for opt-title = (getf option :title)
for cat = (getf option :category)
for sel-p = (eql display-idx sel-idx)
for row = (+ y i)
while (< row (+ y (min height (length filtered))))
do (cond
(sel-p
(draw-rect be (1+ x) row (1- width) 1
:bg (getf colors :input-fg))
(draw-text be (1+ x) row
(format nil " >> ~a" opt-title)
(getf colors :bg-input)
(getf colors :input-fg)))
(cat
(draw-text be (1+ x) row
(format nil " ~a" opt-title)
(getf colors :text-muted) bg-p))
(t
(draw-text be (1+ x) row
(format nil " ~a" opt-title)
(getf colors :agent-fg) bg-p))))
(let ((filter-y (+ y (- height 3))))
(draw-rect be x filter-y width 1 :bg bg-p)
(draw-text be x filter-y
(format nil "> ~a" (or filter ""))
(getf colors :input-prompt) bg-p))))
#+END_SRC
** push-dialog
Pushes a dialog onto =*dialog-stack*=. Returns the dialog for chaining.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun push-dialog (dialog)
(push dialog *dialog-stack*)
dialog)
#+END_SRC
** pop-dialog
Pops the top dialog from the stack. If an ~:on-dismiss~ callback is
set on the dialog, it is called before returning.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun pop-dialog ()
(when *dialog-stack*
(let ((dialog (pop *dialog-stack*)))
(when (dialog-on-dismiss dialog)
(funcall (dialog-on-dismiss dialog)))
dialog)))
#+END_SRC
* Dialog convenience constructors
These factory functions create common dialog variants by composing the
~dialog~ class with interactive components (~select~, ~text-input~).
** alert-dialog
Simple alert with title, message, and an OK button. The button is a
~select~ with a single "OK" option. Dismissing fires ~pop-dialog~ on
both selection and backdrop dismiss.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun alert-dialog (title message)
(make-instance 'dialog
:title title
:size :small
:content (make-instance 'select
:options (list (list :title "OK" :value :ok))
:on-select (lambda (opt) (declare (ignore opt)) (pop-dialog)))
:on-dismiss (lambda () (pop-dialog))))
#+END_SRC
** confirm-dialog
Confirm dialog with Yes/No buttons. Returns ~:yes~ or ~:no~ via the
~on-yes~/~on-no~ callbacks. The dialog auto-dismisses on selection.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun confirm-dialog (title message &key on-yes on-no)
(make-instance 'dialog
:title title
:size :small
:content (make-instance 'select
:options (list (list :title "Yes" :value :yes)
(list :title "No" :value :no))
:on-select (lambda (opt)
(pop-dialog)
(if (eql opt :yes)
(when on-yes (funcall on-yes))
(when on-no (funcall on-no)))))))
#+END_SRC
** select-dialog
Modal wrapper around the ~select~ component. Presents a list of options
and calls ~on-select~ with the chosen value after dismissing.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-dialog (title options &key on-select)
(make-instance 'dialog
:title title
:size :medium
:content (make-instance 'select
:options options
:on-select (lambda (opt)
(pop-dialog)
(when on-select (funcall on-select opt))))))
#+END_SRC
** prompt-dialog
Modal wrapper around ~text-input~. Shows a text input field inside the
dialog and calls ~on-submit~ with the entered value after dismissing.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun prompt-dialog (title &key on-submit)
(make-instance 'dialog
:title title
:size :small
:content (make-instance 'text-input
:on-submit (lambda (value)
(pop-dialog)
(when on-submit (funcall on-submit value))))))
#+END_SRC
* Select widget (absorbed from cl-tty.select)
A selection list component — the building block for command palettes, theme
pickers, and file pickers. Options are plists with ~:title~, ~:value~, and
optional ~:category~ fields.
** Select class
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defclass select (dirty-mixin)
((options :initform nil :initarg :options
:accessor select-options :type list)
(filter :initform nil :initarg :filter
:accessor select-filter :type (or string null))
(selected-index :initform 0 :initarg :selected-index
:accessor select-selected-index :type fixnum)
(on-select :initform nil :initarg :on-select
:accessor select-on-select)
(layout-node :initform (make-layout-node) :initarg :layout-node
:accessor select-layout-node)))
#+END_SRC
** make-select
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun make-select (&key options filter on-select)
(make-instance 'select
:options (or options nil)
:filter filter
:on-select on-select))
#+END_SRC
** component-layout-node
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defmethod component-layout-node ((sel select))
(select-layout-node sel))
#+END_SRC
** select-filtered-options
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-filtered-options (sel)
"Return list of options matching the current filter, in display order.
Each item: (display-index original-index option-plist)."
(let* ((filter (select-filter sel))
(all-options (select-options sel))
(filtered (if (null filter)
all-options
(let ((lower (string-downcase filter)))
(remove-if-not
(lambda (opt)
(or (getf opt :category)
(let ((title (string-downcase (getf opt :title))))
(or (search lower title)
(fuzzy-match-p lower title)))))
all-options)))))
(loop for opt in filtered
for i from 0
collect (list i (position opt all-options) opt))))
#+END_SRC
** fuzzy-match-p
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun fuzzy-match-p (query target)
"T if character-set Jaccard similarity exceeds threshold (0.3)."
(let* ((q-chars (remove-duplicates (coerce (string-downcase query) 'list)))
(t-chars (remove-duplicates (coerce (string-downcase target) 'list)))
(intersection (length (intersection q-chars t-chars)))
(union (length (union q-chars t-chars))))
(if (zerop union) nil (> (/ (float intersection) union) 0.3))))
#+END_SRC
** select-clamp-index
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-clamp-index (sel)
"Ensure selected-index is valid. Wraps if empty."
(let* ((filtered (select-filtered-options sel))
(count (length filtered)))
(if (zerop count)
(setf (select-selected-index sel) 0)
(setf (select-selected-index sel)
(max 0 (min (select-selected-index sel) (1- count)))))))
#+END_SRC
** select-next / select-prev
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-next (sel)
"Move selection to next non-category option. Wraps at end."
(let* ((filtered (select-filtered-options sel))
(count (length filtered))
(current (select-selected-index sel)))
(when (plusp count)
(loop for i from 1 below count
for idx = (mod (+ current i) count)
for opt = (third (nth idx filtered))
when (not (getf opt :category))
do (setf (select-selected-index sel) idx)
(mark-dirty sel)
(return)))))
(defun select-prev (sel)
"Move selection to previous non-category option. Wraps at start."
(let* ((filtered (select-filtered-options sel))
(count (length filtered))
(current (select-selected-index sel)))
(when (plusp count)
(loop for i from 1 below count
for idx = (mod (- current i) count)
for opt = (third (nth idx filtered))
when (not (getf opt :category))
do (setf (select-selected-index sel) idx)
(mark-dirty sel)
(return)))))
#+END_SRC
** select-handle-key
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-handle-key (sel event)
"Handle a key-event. Returns T if handled."
(let ((key (key-event-key event))
(ctrl (key-event-ctrl event)))
(cond
((or (eql key :down) (and ctrl (eql key :n)))
(select-next sel) t)
((or (eql key :up) (and ctrl (eql key :p)))
(select-prev sel) t)
((eql key :enter)
(let* ((filtered (select-filtered-options sel))
(idx (select-selected-index sel))
(item (when (< idx (length filtered))
(third (nth idx filtered)))))
(when item
(let ((cb (select-on-select sel)))
(when cb (funcall cb item))))
t))
((eql key :escape) nil)
(t nil))))
#+END_SRC
** select-visible-options
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun select-visible-options (sel)
"Return filtered options that fit within the viewport."
(let* ((ln (select-layout-node sel))
(height (if ln (layout-node-height ln) 80))
(filtered (select-filtered-options sel))
(sel-idx (select-selected-index sel))
(half (floor (1- height) 2))
(start (max 0 (- sel-idx half)))
(end (min (length filtered) (+ start height))))
(subseq filtered start end)))
#+END_SRC
** Render method for select
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defmethod render ((sel select) backend)
(let* ((ln (select-layout-node sel))
(x (if ln (layout-node-x ln) 0))
(y (if ln (layout-node-y ln) 0))
(w (if ln (layout-node-width ln) 80))
(visible (select-visible-options sel))
(sel-idx (select-selected-index sel)))
(dolist (item visible)
(let* ((display-idx (first item))
(option (third item))
(title (getf option :title))
(is-category (getf option :category))
(is-selected (eql display-idx sel-idx))
(display (if (> (length title) (1- w))
(concatenate 'string (subseq title 0 (1- w)) "…")
title)))
(cond
(is-category
(draw-text backend x y display :text-muted nil))
(is-selected
(draw-rect backend x y w 1 :bg :accent)
(draw-text backend x y display :background :accent))
(t
(draw-text backend x y display nil nil)))
(incf y 1)))
(values)))
#+END_SRC
* Toast system
Transient notifications that appear in the top-right corner. Each toast
has a message and a variant that determines its color (~:info~,
~:success~, ~:warning~, ~:error~).
** toast class
Lightweight class storing the message text and variant keyword.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defclass toast ()
((message :initarg :message :accessor toast-message)
(variant :initarg :variant :initform :info :accessor toast-variant)))
#+END_SRC
** render-toast
Draws a toast in the top-right corner of the screen. The message is
truncated to 60 columns with an ellipsis if necessary. The background
color reflects the variant.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun render-toast (toast screen w)
(let* ((msg (toast-message toast))
(variant (toast-variant toast))
(color (case variant
(:info :blue) (:success :green)
(:warning :yellow) (:error :red)))
(max-w (min 60 (1- w)))
(x (- w max-w 1))
(text (if (> (length msg) (- max-w 2))
(concatenate 'string (subseq msg 0 (- max-w 5)) "...")
msg)))
(draw-rect screen x 0 max-w 1 :bg color)
(draw-text screen (1+ x) 0 text :white color :bold t)))
#+END_SRC
** toast (function)
Fire-and-forget toast notification. Creates a ~toast~ instance, pushes
it onto =*toasts*~, and optionally schedules auto-dismissal via
~dismiss-toast~ when ~duration~ is positive.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun toast (message &key (variant :info) (duration 0))
(let ((toast (make-instance 'toast :message message :variant variant)))
(push toast *toasts*)
(when (plusp duration) (dismiss-toast toast))
toast))
#+END_SRC
** dismiss-toast
Removes a toast from =*toasts*~ by identity (~remove~ with default
~:test #'eql~ compares by pointer for CLOS objects).
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/src/components/dialog.lisp
(defun dismiss-toast (toast)
(setf *toasts* (remove toast *toasts*)))
#+END_SRC
* Tests
Test suite using FiveAM. Each test exercises one function or
interaction.
** Test package and suite
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
;;; dialog-tests.lisp — Tests for cl-tty.dialog
(defpackage :cl-tty-dialog-test
(:use :cl :cl-tty.dialog :fiveam :cl-tty.backend :cl-tty.layout :cl-tty.input)
(:export #:run-tests))
(in-package :cl-tty-dialog-test)
(def-suite dialog-suite :description "Dialog + Toast + Select tests")
(in-suite dialog-suite)
(defun run-tests ()
(let ((result (run 'dialog-suite)))
(fiveam:explain! result)
(uiop:quit 0)))
#+END_SRC
** dialog-create
Basic dialog instantiation — verifies ~make-instance~ and accessors.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test dialog-create ()
(let ((d (make-instance 'dialog :title "Test")))
(is-true (typep d 'dialog))
(is (equal "Test" (dialog-title d)))))
#+END_SRC
** dialog-size-small
~dialog-size-pixels~ returns the correct dimensions for ~:small~.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test dialog-size-small ()
(multiple-value-bind (w h) (dialog-size-pixels :small)
(is (= 40 w))
(is (= 8 h))))
#+END_SRC
** dialog-size-medium
~dialog-size-pixels~ returns the correct dimensions for ~:medium~.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test dialog-size-medium ()
(multiple-value-bind (w h) (dialog-size-pixels :medium)
(is (= 60 w))
(is (= 16 h))))
#+END_SRC
** dialog-push-pop
Verifies stack operations: push adds to =*dialog-stack*~, pop removes
the top element.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test dialog-push-pop ()
(let ((*dialog-stack* nil))
(push-dialog (make-instance 'dialog :title "D1"))
(is (= 1 (length *dialog-stack*)))
(push-dialog (make-instance 'dialog :title "D2"))
(is (= 2 (length *dialog-stack*)))
(pop-dialog)
(is (= 1 (length *dialog-stack*)))))
#+END_SRC
** toast-create
Verifies that ~toast~ pushes onto =*toasts*~.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test toast-create ()
(let ((*toasts* nil))
(toast "Hello" :variant :info :duration 0)
(is (= 1 (length *toasts*)))))
#+END_SRC
** toast-dismiss
Verifies that ~dismiss-toast~ removes the toast from =*toasts*~.
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(def-test toast-dismiss ()
(let ((*toasts* (list (make-instance 'toast :message "T" :variant :info))))
(dismiss-toast (first *toasts*))
(is (= 0 (length *toasts*)))))
#+END_SRC
** Select tests (merged from cl-tty.select)
*** select-creates
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-creates
"A Select can be created with defaults."
(let ((sel (make-select)))
(is (typep sel 'select))
(is-false (select-options sel))
(is-false (select-filter sel))
(is (= (select-selected-index sel) 0))))
#+END_SRC
*** select-with-options
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-with-options
"A Select stores options."
(let ((sel (make-select :options '((:title "Red" :value :red)
(:title "Blue" :value :blue)))))
(is (= (length (select-options sel)) 2))))
#+END_SRC
*** select-filtered-exact
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-filtered-exact
"Filter returns case-insensitive substring matches."
(let ((sel (make-select
:options '((:title "Red" :value :red)
(:title "Green" :value :green)
(:title "Blue" :value :blue)))))
(setf (select-filter sel) "bl")
(let ((filtered (select-filtered-options sel)))
(is (= (length filtered) 1))
(is (eql (getf (third (first filtered)) :value) :blue)))))
#+END_SRC
*** select-filtered-all
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-filtered-all
"Nil filter returns all options."
(let ((sel (make-select
:options '((:title "Red" :value :red)
(:title "Blue" :value :blue)))))
(let ((filtered (select-filtered-options sel)))
(is (= (length filtered) 2)))))
#+END_SRC
*** select-navigation
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-navigation
"Select-next and select-prev navigate through options."
(let ((sel (make-select
:options '((:title "A" :value :a)
(:title "B" :value :b)
(:title "C" :value :c)))))
(is (= (select-selected-index sel) 0))
(select-next sel)
(is (= (select-selected-index sel) 1))
(select-next sel)
(is (= (select-selected-index sel) 2))
(select-next sel)
(is (= (select-selected-index sel) 0) "wraps forward")
(select-prev sel)
(is (= (select-selected-index sel) 2) "wraps backward")))
#+END_SRC
*** select-navigation-skips-categories
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-navigation-skips-categories
"Navigation skips category header options."
(let ((sel (make-select
:options '((:title "Colors" :category t)
(:title "Red" :value :red)
(:title "Green" :value :green)
(:title "Shapes" :category t)
(:title "Circle" :value :circle)))))
(is (= (select-selected-index sel) 0))
(select-next sel)
(is (= (select-selected-index sel) 1) "skipped category header at 0")
(select-next sel)
(is (= (select-selected-index sel) 2))
(select-next sel)
(is (= (select-selected-index sel) 4) "skipped category header at 3")))
#+END_SRC
*** select-handle-key
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-handle-key
"Select handle-key dispatches navigation and selection."
(let* ((result (list nil))
(sel (make-select
:options '((:title "A" :value :a) (:title "B" :value :b))
:on-select (lambda (opt) (setf (car result) (getf opt :value))))))
(select-handle-key sel (make-key-event :key :down))
(is (= (select-selected-index sel) 1))
(select-handle-key sel (make-key-event :key :up))
(is (= (select-selected-index sel) 0))
(select-handle-key sel (make-key-event :key :enter))
(is (eql (car result) :a))))
#+END_SRC
*** select-handle-key-ctrl
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-handle-key-ctrl
"Ctrl+N and Ctrl+P navigate like down/up."
(let ((sel (make-select
:options '((:title "A" :value :a) (:title "B" :value :b) (:title "C" :value :c)))))
(select-handle-key sel (make-key-event :key :n :ctrl t))
(is (= (select-selected-index sel) 1))
(select-handle-key sel (make-key-event :key :p :ctrl t))
(is (= (select-selected-index sel) 0))))
#+END_SRC
*** select-visible-count
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-visible-count
"Visible options respects viewport height."
(let* ((ln (make-layout-node))
(sel (make-select
:options (loop for i below 20 collect (list :title (format nil "Item ~D" i) :value i)))))
(setf (select-layout-node sel) ln)
(setf (layout-node-height ln) 5)
(let ((visible (select-visible-options sel)))
(is (<= (length visible) 5)))))
#+END_SRC
*** select-fuzzy-fallback
#+BEGIN_SRC lisp :tangle ~/.local/share/cl-tty/tests/dialog-tests.lisp
(test select-fuzzy-fallback
"Fuzzy filter catches near-misses."
(let ((sel (make-select
:options '((:title "Nord" :value :nord)
(:title "Tokyo Night" :value :tokyo)
(:title "Catppuccin" :value :cat)))))
(setf (select-filter sel) "nrd")
(let ((filtered (select-filtered-options sel)))
(is (= (length filtered) 1))
(is (eql (getf (third (first filtered)) :value) :nord)))))
#+END_SRC