| 1 | (in-package :lisp-on-lines) |
| 2 | |
| 3 | (define-description editable () |
| 4 | () |
| 5 | (:mixinp t)) |
| 6 | |
| 7 | (define-layered-class standard-attribute |
| 8 | :in-layer #.(defining-description 'editable) |
| 9 | () |
| 10 | ((edit-attribute-p |
| 11 | :initform :inherit |
| 12 | :layered-accessor attribute-editp |
| 13 | :initarg :editp |
| 14 | :layered t) |
| 15 | (setter |
| 16 | :initarg :setter |
| 17 | :layered t |
| 18 | :accessor attribute-setter |
| 19 | :initform nil) |
| 20 | (attribute-editor |
| 21 | :initarg :editor |
| 22 | :layered t |
| 23 | :accessor attribute-editor |
| 24 | :initform (make-instance 'attribute-editor) |
| 25 | :documentation "This ones a bit odd"))) |
| 26 | |
| 27 | (defmethod shared-initialize :after ((object standard-attribute) |
| 28 | slots &rest args &key input &allow-other-keys) |
| 29 | |
| 30 | (when input |
| 31 | (setf (attribute-editor object) |
| 32 | (apply #'make-instance (find-editor-class input) |
| 33 | input)))) |
| 34 | |
| 35 | |
| 36 | (defun find-editor-class (spec) |
| 37 | (let ((class (getf spec :class)) |
| 38 | (type (getf spec :type))) |
| 39 | (or class (when |
| 40 | (and type (symbolp type)) |
| 41 | (let ((name (format nil "~A-~A" type 'attribute-editor))) |
| 42 | (or (find-class (intern name (symbol-package type)) nil) |
| 43 | (find-class (intern name) nil) |
| 44 | 'string-attribute-editor)))))) |
| 45 | |
| 46 | (defclass attribute-editor () |
| 47 | ((class :initarg :class) |
| 48 | (type :initarg :type |
| 49 | :initform 'string |
| 50 | :accessor attribute-editor-type) |
| 51 | (parser :initarg :parse-using |
| 52 | :initform 'identity |
| 53 | :accessor attribute-editor-parsing-function) |
| 54 | (prompt :initarg :prompt |
| 55 | :initform nil) |
| 56 | (unbound-value |
| 57 | :initarg :unbound-value |
| 58 | :initform ""))) |
| 59 | |
| 60 | |
| 61 | |
| 62 | (defclass string-attribute-editor (attribute-editor) ()) |
| 63 | (defclass text-attribute-editor (string-attribute-editor) ()) |
| 64 | |
| 65 | (deftype password () 'string) |
| 66 | |
| 67 | (defclass password-attribute-editor (string-attribute-editor) ()) |
| 68 | |
| 69 | (defclass number-attribute-editor (attribute-editor) () |
| 70 | (:default-initargs |
| 71 | :parse-using 'parse-number:PARSE-NUMBER |
| 72 | :type 'number)) |
| 73 | |
| 74 | (defun parse-attribute-value (attribute value) |
| 75 | (funcall (attribute-editor-parsing-function |
| 76 | (attribute-editor attribute)) |
| 77 | value)) |
| 78 | |
| 79 | (define-layered-function display-attribute-editor (attribute) |
| 80 | (:method (attribute) |
| 81 | (setf (attribute-value attribute) |
| 82 | (funcall (attribute-editor-parsing-function |
| 83 | (attribute-editor attribute)) |
| 84 | (read-line))))) |
| 85 | |
| 86 | (define-description T () |
| 87 | ((editp :label "Edit by Default?" |
| 88 | :value nil |
| 89 | :editp nil) |
| 90 | (identity :editp nil) |
| 91 | (type :editp nil) |
| 92 | (class :editp nil)) |
| 93 | (:in-description editable)) |
| 94 | |
| 95 | (define-layered-method (setf attribute-value-using-object) |
| 96 | :in-layer #.(defining-description 'editable)(value object attribute) |
| 97 | |
| 98 | (let ((setter (attribute-setter attribute))) |
| 99 | (if setter |
| 100 | (funcall setter value object) |
| 101 | (error "No setter in ~A for ~A" attribute object)))) |
| 102 | |
| 103 | |
| 104 | (define-layered-function attribute-editp (attribute) |
| 105 | (:method (attribute) nil)) |
| 106 | |
| 107 | (define-layered-method attribute-editp |
| 108 | :in-layer #.(defining-description 'editable) |
| 109 | ((attribute standard-attribute)) |
| 110 | (let ((value (attribute-value attribute))) |
| 111 | (unless (or (unbound-slot-value-p value) |
| 112 | (typep value |
| 113 | (attribute-editor-type |
| 114 | (attribute-editor attribute)))) |
| 115 | (return-from attribute-editp nil))) |
| 116 | (let ((edit? (call-next-method))) |
| 117 | (if (eq :inherit edit?) |
| 118 | (attribute-value (find-attribute |
| 119 | (attribute-description attribute) |
| 120 | 'editp)) |
| 121 | edit?))) |
| 122 | |
| 123 | |
| 124 | (define-layered-method display-attribute-value |
| 125 | :in-layer #.(defining-description 'editable) |
| 126 | ((attribute standard-attribute)) |
| 127 | (if (attribute-editp attribute) |
| 128 | (display-attribute-editor attribute) |
| 129 | (call-next-method))) |
| 130 | |
| 131 | |
| 132 | |
| 133 | |
| 134 | |
| 135 | |