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mapping.lisp
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(in-package #:org.shirakumo.fraf.trial)
(define-global +map-key-events+ T)
(define-global +retention-table+ (make-hash-table :test 'eql))
(define-global +direction-table+ (make-hash-table :test 'eql))
(defvar *mapping-functions* (make-hash-table :test 'eql))
(defvar *action-mappings* ())
(defun mapping-function (name)
(gethash name *mapping-functions*))
(defun (setf mapping-function) (mapping name)
(setf (gethash name *mapping-functions*) mapping))
(defun remove-mapping-function (name)
(remhash name *mapping-functions*))
(defmacro define-mapping-function (name (loop ev) &body body)
`(setf (mapping-function ',name)
(lambda (,loop ,ev)
(declare (ignorable ,loop))
,@body)))
(defun map-event (event loop)
(when (or +map-key-events+
(not (typep event 'key-event)))
(loop for function being the hash-values of *mapping-functions*
do (funcall function loop event))))
(declaim (inline %retained (setf %retained) retained (setf retained) directional clear-retained))
(defun %retained (id)
(gethash id +retention-table+ 0))
(defun (setf %retained) (int id)
(setf (gethash id +retention-table+) int))
(defun retained (id)
(< 0 (the (signed-byte 8) (gethash id +retention-table+ 0))))
(defun (setf retained) (bool id)
(setf (gethash id +retention-table+) (if bool 1 0)))
(defun clear-retained ()
(clrhash +retention-table+))
(defun reset-retained (&optional (scene (scene +main+)))
(clear-retained)
(typecase +input-source+
((eql :keyboard)
;; FIXME: how the heck do we do this?
)
(gamepad:device
(loop for label across gamepad:+labels+
for button = (gamepad:button label +input-source+)
for axis = (gamepad:axis label +input-source+)
do (when button
(map-event (make-instance 'gamepad-press :button label :device +input-source+)
scene))
(when (<= 0.2 (abs axis))
(map-event (make-instance 'gamepad-move :axis label :pos axis :old-pos 0.0 :device +input-source+)
scene))))))
(defun directional (id)
(let ((value (gethash id +direction-table+)))
(the vec4
(or value
(setf (gethash id +direction-table+) (vec 0 0 0 0))))))
(defun clear-directional (&optional id)
(if id
(vsetf (directional id) 0 0 0 0)
(loop for directional being the hash-values of +direction-table+
do (vsetf directional 0 0 0 0))))
(define-mapping-function retain-generic (loop ev)
(typecase ev
(mouse-press
(setf (retained (button ev)) T))
(mouse-release
(setf (retained (button ev)) NIL))
(key-press
(setf (retained (key ev)) T)
(case (key ev)
((:left-control :right-control) (setf (retained :control) T))
((:left-shift :right-shift) (setf (retained :shift) T))
((:left-alt :right-alt) (setf (retained :alt) T))))
(key-release
(setf (retained (key ev)) NIL)
(case (key ev)
((:left-control :right-control) (setf (retained :control) NIL))
((:left-shift :right-shift) (setf (retained :shift) NIL))
((:left-alt :right-alt) (setf (retained :alt) NIL))))))
(defclass action-mapping ()
((action-type :initarg :action-type :accessor action-type)
(event-type :initarg :event-type :accessor event-type)
(qualifier :initarg :qualifier :accessor qualifier)
(%action-prototype)))
(defmethod shared-initialize :after ((mapping action-mapping) slots &key)
(setf (slot-value mapping '%action-prototype) (c2mop:class-prototype (c2mop:ensure-finalized (find-class (action-type mapping))))))
(defmethod print-object ((mapping action-mapping) stream)
(print-unreadable-object (mapping stream :type T)
(format stream "~s ~s -> ~s" (event-type mapping) (qualifier mapping) (action-type mapping))))
(defgeneric event-applicable-p (event mapping))
(defgeneric event-active-p (event mapping))
(defgeneric perform-event-mapping (event mapping loop))
(defgeneric from-mapping-description (type action bindings))
(defgeneric to-mapping-description (mapping))
(defgeneric event-from-action-mapping (mapping))
(defgeneric event-to-action-mapping (event action &key))
(defgeneric stratify-action-mapping (mapping))
(defmethod clear ((mapping action-mapping)))
(defmethod active-p ((mapping action-mapping))
(active-p (slot-value mapping '%action-prototype)))
(defmethod event-applicable-p ((event event) (mapping action-mapping))
NIL)
(defmethod event-applicable-p ((event key-event) (mapping action-mapping))
(and (not (repeat-p event))
(typep event (event-type mapping))
(find (key event) (qualifier mapping))))
(defmethod event-applicable-p ((event mouse-button-event) (mapping action-mapping))
(and (typep event (event-type mapping))
(find (button event) (qualifier mapping))))
(defmethod event-applicable-p ((event gamepad-button-event) (mapping action-mapping))
(and (typep event (event-type mapping))
(find (button event) (qualifier mapping))))
(defmethod event-applicable-p ((event gamepad-move) (mapping action-mapping))
(and (typep event (event-type mapping))
(find (axis event) (qualifier mapping))))
(defmethod stratify-action-mapping ((mapping action-mapping))
(loop for qualifier in (qualifier mapping)
collect (make-instance (type-of mapping) :action-type (action-type mapping)
:event-type (event-type mapping)
:qualifier (list qualifier))))
(defmethod event-to-action-mapping (event (action symbol) &rest args &key &allow-other-keys)
(apply #'event-to-action-mapping event (make-instance action) args))
(defclass digital-mapping (action-mapping)
((threshold :initarg :threshold :initform +0.5 :accessor threshold)
(toggle-p :initarg :toggle-p :initform NIL :accessor toggle-p)))
(defmethod event-active-p ((event gamepad-move) (mapping digital-mapping))
(let* ((threshold (threshold mapping))
(old (old-pos event))
(cur (pos event)))
(if (< 0.0 threshold)
(cond ((< old threshold cur)
:on)
((< cur threshold old)
:off))
(cond ((< cur threshold old)
:on)
((< old threshold cur)
:off)))))
(defmethod event-active-p ((event digital-event) (mapping digital-mapping))
(if (typep event 'press-event)
:on :off))
(defmethod perform-event-mapping (event (mapping digital-mapping) loop)
(let ((active-p (event-active-p event mapping))
(action (action-type mapping)))
(when active-p
(let ((active-p (eql :on active-p)))
(cond ((toggle-p mapping)
(when active-p
(setf (%retained action) (if (retained action) -1 +1))))
(T
(when (and (not (retained action)) active-p)
(issue loop (make-instance action :source-event event)))
(typecase event
(digital-event
(setf (%retained action) (max 0 (+ (%retained action) (if active-p +1 -1)))))
(T
(setf (%retained action) (if active-p +1 0))))))))))
(defun normalize-mapping-event-type (type)
(case type
(key 'key-event)
(mouse 'mouse-button-event)
(button 'gamepad-button-event)
(axis 'gamepad-move)
(T type)))
(defmethod from-mapping-description ((type (eql 'trigger)) action bindings)
(when (check-action action)
(loop for binding in bindings
collect (destructuring-bind (type &key one-of edge threshold (toggle NIL toggle-p)) binding
(make-instance 'digital-mapping
:action-type action
:event-type (normalize-mapping-event-type type)
:qualifier one-of
:threshold (or threshold 0.5)
:toggle-p (if toggle-p toggle (eql :rise-only edge)))))))
(defmethod to-mapping-description ((mapping digital-mapping))
(list* 'trigger (action-type mapping)
(append (list (case (event-type mapping)
((key-event key-press) 'key)
((mouse-button-event mouse-press) 'mouse)
((gamepad-button-event gamepad-press) 'button)
(gamepad-move 'axis)
(T (event-type mapping)))
:one-of (qualifier mapping))
(unless (subtypep (event-type mapping) 'digital-event)
(list :threshold (threshold mapping)))
(when (toggle-p mapping) `(:toggle T)))))
(defmethod event-from-action-mapping ((mapping digital-mapping))
(let ((qualifier (first (qualifier mapping))))
(ecase (event-type mapping)
((key-event key-press key-release) (make-instance 'key-press :key qualifier))
((mouse-button-event mouse-press mouse-release) (make-instance 'mouse-press :button qualifier :pos #.(vec 0 0)))
((gamepad-button-event gamepad-press gamepad-release) (make-instance 'gamepad-press :device NIL :button qualifier))
(gamepad-move (make-instance 'gamepad-move :device NIL :axis qualifier :old-pos 0.0 :pos (threshold mapping))))))
(defmethod event-to-action-mapping ((event gamepad-move) (action action) &key (threshold 0.5) toggle-p)
(make-instance 'digital-mapping
:action-type (type-of action)
:event-type (type-of event)
:qualifier (list (axis event))
:threshold threshold
:toggle-p toggle-p))
(defmethod event-to-action-mapping ((event digital-event) (action action) &key toggle-p)
(make-instance 'digital-mapping
:action-type (type-of action)
:event-type (typecase event
(key-event 'key-event)
(mouse-button-event 'mouse-button-event)
(gamepad-button-event 'gamepad-button-event)
(T (type-of event)))
:qualifier (list (button event))
:toggle-p toggle-p))
(defmethod stratify-action-mapping ((mapping digital-mapping))
(mapc (lambda (new)
(setf (threshold new) (threshold mapping))
(setf (toggle-p new) (toggle-p mapping)))
(call-next-method)))
(defclass axis-directional-mapping (action-mapping)
((event-type :initform 'gamepad-move)
(dead-zone :initarg :dead-zone :initform 0.1 :accessor dead-zone)
(axis :initarg :axis :initform :x :accessor axis)))
(defmethod perform-event-mapping (event (mapping axis-directional-mapping) loop)
(let* ((pos (pos event))
(value (if (< (dead-zone mapping) (abs pos)) pos 0.0))
(action (action-type mapping))
(vec (directional action)))
(ecase (axis mapping)
(:x (setf (vx vec) value))
(:y (setf (vy vec) value))
(:z (setf (vz vec) value))
(:w (setf (vw vec) value)))
(let ((event (make-event action)))
(v<- (direction event) vec)
(issue loop event))))
(defmethod stratify-action-mapping ((mapping axis-directional-mapping))
(mapc (lambda (new)
(setf (dead-zone new) (dead-zone mapping))
(setf (axis new) (axis mapping)))
(call-next-method)))
(defmethod event-from-action-mapping ((mapping axis-directional-mapping))
(let ((qualifier (first (qualifier mapping))))
(make-instance 'gamepad-move :device NIL :axis qualifier :old-pos 0.0 :pos (dead-zone mapping))))
(defmethod event-to-action-mapping ((event gamepad-move) (action directional-action) &key (dead-zone 0.1) (axis :x))
(make-instance 'axis-directional-mapping
:action-type (type-of action)
:event-type (type-of event)
:qualifier (list (axis event))
:dead-zone dead-zone
:axis axis))
(defmethod to-mapping-description ((mapping axis-directional-mapping))
(list* 'directional (action-type mapping)
`(axis :axis ,(axis mapping) :one-of ,(qualifier mapping) :dead-zone ,(dead-zone mapping))))
(defclass digital-directional-mapping (action-mapping)
((high-value :initarg :high-value :initform 1.0 :accessor high-value)
(low-value :initarg :low-value :initform 0.0 :accessor low-value)
(axis :initarg :axis :initform :x :accessor axis)
;; KLUDGE: I kind of hate having to keep this state here.
(pressed-p :initform NIL :accessor pressed-p)))
(defmethod clear ((mapping digital-directional-mapping))
(setf (pressed-p mapping) NIL))
(defmethod maybe-reactivate-other-mapping ((like digital-directional-mapping))
;; KLUDGE: This kind of blows since we need to scan all mappings explicitly.
(dolist (mapping *action-mappings* NIL)
(when (and (not (eq mapping like))
(typep mapping 'digital-directional-mapping)
(eq (action-type mapping) (action-type like))
(eq (axis mapping) (axis like))
(pressed-p mapping))
(setf (aref (varr (directional (action-type mapping)))
(ecase (axis mapping)
(:x 0) (:y 1) (:z 2) (:w 3)))
(high-value mapping))
(return T))))
(defmethod perform-event-mapping (event (mapping digital-directional-mapping) loop)
(let* ((action (action-type mapping))
(vec (directional action))
(axis (ecase (axis mapping)
(:x 0) (:y 1) (:z 2) (:w 3))))
(cond ((typep event 'press-event)
(setf (pressed-p mapping) T)
(setf (aref (varr vec) axis) (high-value mapping)))
((maybe-reactivate-other-mapping mapping)
(setf (pressed-p mapping) NIL))
(T
(setf (pressed-p mapping) NIL)
(setf (aref (varr vec) axis) (low-value mapping))))
(let ((event (make-event action)))
(v<- (direction event) vec)
(issue loop event))))
(defmethod stratify-action-mapping ((mapping digital-directional-mapping))
(mapc (lambda (new)
(setf (high-value new) (high-value mapping))
(setf (low-value new) (low-value mapping))
(setf (axis new) (axis mapping)))
(call-next-method)))
(defmethod event-from-action-mapping ((mapping digital-directional-mapping))
(let ((qualifier (first (qualifier mapping))))
(ecase (event-type mapping)
((key-event key-press key-release) (make-instance 'key-press :key qualifier))
((mouse-button-event mouse-press mouse-release) (make-instance 'mouse-press :button qualifier :pos #.(vec 0 0)))
((gamepad-button-event gamepad-press gamepad-release) (make-instance 'gamepad-press :device NIL :button qualifier)))))
(defmethod event-to-action-mapping ((event digital-event) (action directional-action) &key (high-value 1.0) (low-value 0.0) (axis :x))
(make-instance 'digital-directional-mapping
:action-type (type-of action)
:event-type (type-of event)
:qualifier (list (button event))
:high-value high-value
:low-value low-value
:axis axis))
(defmethod to-mapping-description ((mapping digital-directional-mapping))
(list* 'directional (action-type mapping)
`(,(case (event-type mapping)
((key-event key-press) 'key)
((mouse-button-event mouse-press) 'mouse)
((gamepad-button-event gamepad-press) 'button)
(gamepad-move 'axis)
(T (event-type mapping)))
:axis ,(axis mapping)
:one-of ,(qualifier mapping)
:high-value ,(high-value mapping)
:low-value ,(low-value mapping))))
(defclass mouse-directional-mapping (action-mapping)
((event-type :initform 'mouse-move)
(qualifier :initform ())
(scaling :initarg :scaling :initform (vec 1 1) :accessor scaling)
(dead-zone :initarg :dead-zone :initform 0.1 :accessor dead-zone)
(timeout :initarg :timeout :initform 0.02 :accessor timeout)
(clock :initarg :clock :initform 0.0 :accessor clock)))
;; TODO: implement mouse smoothing
(defmethod event-applicable-p ((event mouse-move) (mapping mouse-directional-mapping))
T)
(defmethod event-applicable-p ((event tick) (mapping mouse-directional-mapping))
T)
(defmethod perform-event-mapping (event (mapping mouse-directional-mapping) loop)
(let* ((action (action-type mapping))
(vec (directional action))
(scaling (scaling mapping))
(delta (load-time-value (vec 0 0)))
(dead-zone (dead-zone mapping)))
(v<- delta (pos event))
(nv- delta (old-pos event))
(setf (vx vec) (* (vx scaling) (if (< dead-zone (abs (vx delta))) (vx delta) 0.0)))
(setf (vy vec) (* (vy scaling) (if (< dead-zone (abs (vy delta))) (vy delta) 0.0)))
(setf (clock mapping) (timeout mapping))
(let ((event (make-event action)))
(v<- (direction event) vec)
(issue loop event))))
;; KLUDGE: This is necessary to "unstick" the mouse once it stops moving.
(defmethod perform-event-mapping ((event tick) (mapping mouse-directional-mapping) loop)
(let ((clock (clock mapping)))
(when (and (< 0.0 clock)
(<= (decf clock (dt event)) 0.0))
(let* ((action (action-type mapping))
(vec (directional action)))
(setf (vx vec) 0.0)
(setf (vy vec) 0.0)
(let ((event (make-event action)))
(v<- (direction event) vec)
(issue loop event))))
(setf (clock mapping) clock)))
(defmethod stratify-action-mapping ((mapping mouse-directional-mapping))
(mapc (lambda (new)
(setf (scaling new) (scaling mapping))
(setf (dead-zone new) (dead-zone mapping)))
(call-next-method)))
(defmethod event-from-action-mapping ((mapping mouse-directional-mapping))
(make-instance 'mouse-move :device NIL :old-pos (vec 0 0) :pos (v/ (dead-zone mapping) (scaling mapping))))
(defmethod event-to-action-mapping ((event mouse-move) (action directional-action) &key (scaling (vec 1 1)) (dead-zone 0.1) (timeout 0.02))
(make-instance 'mouse-directional-mapping
:action-type (type-of action)
:event-type (type-of event)
:qualifier (list (button event))
:scaling scaling
:dead-zone dead-zone
:timeout timeout))
(defmethod to-mapping-description ((mapping mouse-directional-mapping))
(list* 'directional (action-type mapping)
`(point :scaling (,(vx (scaling mapping)) ,(vy (scaling mapping))) :timeout ,(timeout mapping) :dead-zone ,(dead-zone mapping))))
(defmethod from-mapping-description ((type (eql 'directional)) action bindings)
(when (check-action action)
(let ((mappings ()))
(flet ((add (type &rest initargs)
(push (apply #'make-instance type :action-type action initargs) mappings)))
(dolist (binding bindings mappings)
(destructuring-bind (type &key (axis :x) one-of (timeout 0.02) (dead-zone 0.1) (low-value 0.0) (high-value 1.0) (scaling '(1 1))) binding
(ecase type
(axis
(add 'axis-directional-mapping
:qualifier one-of
:axis axis
:dead-zone dead-zone))
((key button mouse)
(add 'digital-directional-mapping
:event-type (normalize-mapping-event-type type)
:qualifier one-of
:axis axis
:high-value high-value
:low-value low-value))
(point
(add 'mouse-directional-mapping
:scaling (vec (first scaling) (second scaling))
:dead-zone dead-zone
:timeout timeout))
(stick
(loop for (x y) in one-of
do (add 'axis-directional-mapping :qualifier (list x) :axis :x :dead-zone dead-zone)
(add 'axis-directional-mapping :qualifier (list y) :axis :y :dead-zone dead-zone)))
(buttons
(loop for (u l d r) in one-of
do (add 'digital-directional-mapping :event-type 'gamepad-button-event :qualifier (list u) :axis :y :high-value (+ high-value) :low-value (+ low-value))
(add 'digital-directional-mapping :event-type 'gamepad-button-event :qualifier (list l) :axis :x :high-value (- high-value) :low-value (- low-value))
(add 'digital-directional-mapping :event-type 'gamepad-button-event :qualifier (list r) :axis :x :high-value (+ high-value) :low-value (+ low-value))
(add 'digital-directional-mapping :event-type 'gamepad-button-event :qualifier (list d) :axis :y :high-value (- high-value) :low-value (- low-value))))
(keys
(loop for (u l d r) in one-of
do (add 'digital-directional-mapping :event-type 'key-event :qualifier (list u) :axis :y :high-value (+ high-value) :low-value (+ low-value))
(add 'digital-directional-mapping :event-type 'key-event :qualifier (list l) :axis :x :high-value (- high-value) :low-value (- low-value))
(add 'digital-directional-mapping :event-type 'key-event :qualifier (list r) :axis :x :high-value (+ high-value) :low-value (+ low-value))
(add 'digital-directional-mapping :event-type 'key-event :qualifier (list d) :axis :y :high-value (- high-value) :low-value (- low-value)))))))))))
(define-mapping-function input-maps (loop event)
;; TODO: This is slow, as we keep iterating over and testing for events that will
;; very likely not change for a long time (comparatively). We should cache
;; the set of applicable mappings depending on active action-sets whenever
;; those change.
(if (typep event 'lose-focus)
(mapc #'clear *action-mappings*)
(dolist (mapping *action-mappings*)
(when (and (active-p mapping)
(event-applicable-p event mapping))
(perform-event-mapping event mapping loop)))))
(defun compile-mapping (input)
(let ((mappings ()))
(dolist (description input)
(destructuring-bind (type action &rest bindings) description
(dolist (mapping (from-mapping-description type action bindings))
(push mapping mappings))))
(setf *action-mappings* mappings)))
(defun load-mapping (input &key (package *package*))
(etypecase input
((or pathname string)
(load-mapping (depot:from-pathname input) :package package))
(depot:entry
(depot:with-open (tx input :input 'character)
(load-mapping (depot:to-stream tx) :package package)))
(stream
(load-mapping (loop with *package* = package
for form = (read input NIL '#1=#:END)
until (eq form '#1#)
collect form)))
(list
(compile-mapping input))))
(defun save-mapping (output &key (package *package*))
(etypecase output
(null
(with-output-to-string (stream)
(save-mapping stream :package package)))
((or pathname string)
(save-mapping (depot:from-pathname output) :package package))
(depot:entry
(depot:with-open (tx output :output 'character)
(save-mapping (depot:to-stream tx) :package package)))
(stream
(let ((descriptions (mapcar #'to-mapping-description *action-mappings*))
(cache (make-hash-table :test 'equal))
(*print-case* :downcase)
(*package* package))
(dolist (description descriptions)
(push (cddr description) (gethash (list (first description) (second description)) cache)))
;; FIXME: collect based on matching :one-of.
(let ((descriptions (loop for preamble being the hash-keys of cache
for bindings being the hash-values of cache
collect (append preamble bindings))))
(loop for (type event . bindings) in descriptions
do (format output "(~s ~s~{~% ~s~})~%~%"
type event bindings)))))))
(defun find-action-mappings (action &optional (input-event-type 'input-event))
(let ((triggers ()))
(loop for mapping in *action-mappings*
do (when (and (eql action (action-type mapping))
(subtypep (event-type mapping) input-event-type))
(push mapping triggers)))
triggers))
(defun update-action-mappings (new-mappings &key (prune-event-type T))
(let ((mappings (append new-mappings
(remove-if (lambda (mapping)
(and (find (action-type mapping) new-mappings :key #'action-type)
(subtypep (event-type mapping) prune-event-type)))
*action-mappings*))))
(mapc #'clear mappings)
(setf *action-mappings* mappings)))
#| Keymap should have the following syntax:
keymap ::= mapping*
mapping ::= (type action trigger*)
type ::= retain | trigger
trigger ::= (key one-of edge?)
| (mouse one-of edge?)
| (button one-of edge?)
| (axis one-of edge? threshold?)
one-of ::= :one-of label
edge ::= :edge :rise | :edge :fall
threshold ::= :threshold number
action --- a symbol naming an action event
label --- a keyword naming a key or button label
Examples:
(trigger quicksave
(label :english "Quick Save")
(key :one-of (:f5)))
(retain dash
(label :english "Dash")
(axis :one-of (:r2) :threshold 0.2))
|#