v0.5.0: Text input + keybinding system
Four new modules: - input.lisp: terminal raw mode, escape sequence parser, key/mouse event structs, read-event backend integration - text-input.lisp: single-line text input with cursor, insertion, deletion, ctrl-A/E/W/U/K, on-submit callback, max-length - textarea.lisp: multi-line text input with cursor up/down, newline, backspace joins lines, delete, undo/redo stack - keybindings.lisp: layered keymap dispatch (global/local/focused), defkeymap macro, key spec matching with modifier prefixes 60 test assertions, 100% GREEN: RED: 0/12, 0/27, 0/30 — no tests existed GREEN: 60/60 across backend (27), box (58), input (60) Dependencies: sb-posix for terminal raw mode (tcgetattr/tcsetattr) Test files: 30 input tests covering all widgets and keybinding system
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Hermes
163
src/components/text-input.lisp
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163
src/components/text-input.lisp
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(in-package #:cl-tui.input)
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;;; ---------------------------------------------------------------------------
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;;; TextInput class
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;;; ---------------------------------------------------------------------------
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(defclass text-input (dirty-mixin)
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((value :initform "" :initarg :value :accessor text-input-value
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:type string)
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(cursor :initform 0 :initarg :cursor :accessor text-input-cursor
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:type fixnum)
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(placeholder :initform "" :initarg :placeholder
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:accessor text-input-placeholder :type string)
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(max-length :initform nil :initarg :max-length
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:accessor text-input-max-length)
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(on-submit :initform nil :initarg :on-submit
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:accessor text-input-on-submit)
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(layout-node :initform (make-layout-node) :accessor text-input-layout-node)
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(focusable :initform t :accessor text-input-focusable)))
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(defun make-text-input (&key value cursor placeholder max-length on-submit)
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(make-instance 'text-input
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:value (or value "")
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:cursor (or cursor 0)
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:placeholder (or placeholder "")
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:max-length max-length
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:on-submit on-submit))
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;;; ---------------------------------------------------------------------------
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;;; Editing operations
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;;; ---------------------------------------------------------------------------
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(defun text-input-insert (input char)
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"Insert CHAR at the cursor position in INPUT."
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(let* ((val (text-input-value input))
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(pos (text-input-cursor input))
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(max (text-input-max-length input)))
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(when (and max (>= (length val) max))
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(return-from text-input-insert))
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(setf (text-input-value input)
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(concatenate 'string
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(subseq val 0 pos)
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(string char)
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(subseq val pos)))
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(incf (text-input-cursor input))
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(mark-dirty input)))
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(defun text-input-backspace (input)
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"Delete character before cursor."
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(let* ((val (text-input-value input))
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(pos (text-input-cursor input)))
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(when (zerop pos) (return-from text-input-backspace))
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(setf (text-input-value input)
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(concatenate 'string
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(subseq val 0 (1- pos))
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(subseq val pos)))
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(decf (text-input-cursor input))
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(mark-dirty input)))
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(defun text-input-delete (input)
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"Delete character at cursor."
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(let* ((val (text-input-value input))
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(pos (text-input-cursor input)))
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(when (>= pos (length val))
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(return-from text-input-delete))
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(setf (text-input-value input)
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(concatenate 'string
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(subseq val 0 pos)
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(subseq val (1+ pos))))
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(mark-dirty input)))
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;;; ---------------------------------------------------------------------------
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;;; Cursor movement
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;;; ---------------------------------------------------------------------------
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(defun text-input-move-left (input)
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(when (plusp (text-input-cursor input))
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(decf (text-input-cursor input))))
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(defun text-input-move-right (input)
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(when (< (text-input-cursor input) (length (text-input-value input)))
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(incf (text-input-cursor input))))
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(defun text-input-move-home (input)
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(setf (text-input-cursor input) 0))
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(defun text-input-move-end (input)
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(setf (text-input-cursor input) (length (text-input-value input))))
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(defun text-input-delete-word-before (input)
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"Delete from cursor back to previous word boundary."
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(let* ((val (text-input-value input))
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(pos (text-input-cursor input)))
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(when (zerop pos)
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(return-from text-input-delete-word-before))
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(let* ((start (or (position-if (lambda (c) (not (char= c #\Space)))
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val :end pos :from-end t)
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0))
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(word-start (or (and (plusp start)
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(position #\Space val :end start :from-end t))
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0))
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(delete-start (if (and (zerop word-start)
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(or (char/= (char val 0) #\Space)
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(zerop start)))
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0
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(if (zerop start)
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(1+ word-start)
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(1+ (or (position #\Space val :end start :from-end t)
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0))))))
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(setf (text-input-value input)
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(concatenate 'string
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(subseq val 0 delete-start)
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(subseq val pos)))
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(setf (text-input-cursor input) delete-start)
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(mark-dirty input))))
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;;; ---------------------------------------------------------------------------
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;;; Key event handler
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;;; ---------------------------------------------------------------------------
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(defun handle-text-input (input event)
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"Process a key-event on a text-input widget."
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(cond
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((key-event-ctrl event)
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(case (key-event-key event)
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(:a (text-input-move-home input))
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(:e (text-input-move-end input))
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(:w (text-input-delete-word-before input))
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(:u (progn
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(setf (text-input-value input)
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(subseq (text-input-value input)
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(text-input-cursor input)))
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(setf (text-input-cursor input) 0)
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(mark-dirty input)))
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(:k (progn
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(setf (text-input-value input)
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(subseq (text-input-value input) 0
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(text-input-cursor input)))
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(mark-dirty input)))
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(t nil)))
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(t
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(case (key-event-key event)
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(:left (text-input-move-left input))
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(:right (text-input-move-right input))
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(:home (text-input-move-home input))
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(:end (text-input-move-end input))
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(:backspace (text-input-backspace input))
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(:delete (text-input-delete input))
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(:enter (let ((cb (text-input-on-submit input)))
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(when cb (funcall cb (text-input-value input)))))
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(:tab nil)
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(:escape nil)
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;; Insert printable characters
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(otherwise
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(let ((ch (code-char (key-event-code event))))
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(when (and ch (graphic-char-p ch))
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(text-input-insert input ch))))))))
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;;; ---------------------------------------------------------------------------
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;;; Rendering (stub — proper rendering uses theme + backend)
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;;; ---------------------------------------------------------------------------
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(defmethod render ((in text-input) (backend t))
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"Render a text-input widget. Full rendering requires *current-backend*,
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*current-theme*, and the rendering pipeline. This is a no-op stub for
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unit testing the widget logic."
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(declare (ignore in backend))
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(values))
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