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impl.cljs
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impl.cljs
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(ns re-pressed.impl
(:require
[re-frame.core :as rf]
[goog.events :as ev]
))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Vars
(def ns-root "re-pressed.core/")
(def max-record 25)
(def modifier-keys #{16 ;; shift
17 ;; ctrl
18 ;; alt
91 ;; windows (i.e. meta) ... TODO: apple key?
})
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Util
(defn ->ns-keyword [event-type]
(fn ns-keyword
([]
(ns-keyword nil))
([suffix]
(keyword
(str ns-root
event-type
suffix)))))
(defn is-key?
[recent-key key-map]
(every? (fn [[k v]]
(= (get recent-key k)
v))
key-map))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Subs
(defn register-subs [event-type prefix]
(let [ns-keyword (->ns-keyword event-type)]
(rf/reg-sub
(ns-keyword "-keys")
(fn [db _]
(get-in db [prefix (ns-keyword) :keys])))
(rf/reg-sub
(ns-keyword "-event-keys")
(fn [db _]
(get-in db [prefix (ns-keyword) :event-keys])))
(rf/reg-sub
(ns-keyword "-clear-keys")
(fn [db _]
(get-in db [prefix (ns-keyword) :clear-keys])))
(rf/reg-sub
(ns-keyword "-always-listen-keys")
(fn [db _]
(get-in db [prefix (ns-keyword) :always-listen-keys])))
(when (= "keydown" event-type)
(rf/reg-sub
(ns-keyword "-prevent-default-keys")
(fn [db _]
(get-in db [prefix (ns-keyword) :prevent-default-keys]))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Events
(defn- ->set-key! [event-type prefix]
(let [ns-keyword (->ns-keyword event-type)]
(fn set-key!
[{:keys [db]} [_ key-map]]
{:db (update-in db [prefix (ns-keyword) :keys]
(fn [key-maps]
(let [keys (if key-map
(conj (or key-maps
[])
key-map)
key-maps)]
keys
(into []
(take-last max-record keys)))))})))
(defn- ->clear-keys! [event-type prefix]
(let [ns-keyword (->ns-keyword event-type)]
(fn clear-keys!
[{:keys [db]} [_ key-map]]
{:db (assoc-in db [prefix (ns-keyword)
:keys] [])})))
(defn prevent-default-keys!
[_ [_ e]]
(let [k (keyword
(str ns-root "prevent-default"))]
{k e}))
(defn register-events [event-type prefix]
(let [ns-keyword (->ns-keyword event-type)]
(rf/reg-event-fx (ns-keyword "-set-key")
(->set-key! event-type prefix))
(rf/reg-event-fx (ns-keyword "-clear-keys")
(->clear-keys! event-type prefix))
(when (= "keydown" event-type)
(rf/reg-event-fx (ns-keyword "-prevent-default-keys")
prevent-default-keys!))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Effects
(defn register-effects [event-type]
(when (= "keydown" event-type)
(rf/reg-fx
(keyword
(str ns-root "prevent-default"))
(fn [e]
(.preventDefault e)))))
(rf/reg-fx
(keyword
(str ns-root "keyboard-event"))
(fn [{event-type :event-type {:keys [prefix] :as arguments} :arguments}]
#_(js/console.info "@Keyboard-event:" (clj->js arguments) "\nprefix:" prefix)
(register-subs event-type prefix)
(register-events event-type prefix)
(register-effects event-type)
(let [{:keys [clear-on-success-event-match]} arguments]
(ev/listen
js/document
event-type
(fn [e]
(let [ns-keyword (->ns-keyword event-type)
e-key (.-keyCode e)
modifier-key? (modifier-keys e-key)
;; --
;; thanks re-frame-10x for this snippet
tag-name (.-tagName (.-target e))
entering-input? (contains?
#{"INPUT"
"SELECT"
"TEXTAREA"} tag-name)
;; --
hit-key {:altKey (.-altKey e)
:ctrlKey (.-ctrlKey e)
:metaKey (.-metaKey e)
:shiftKey (.-shiftKey e)
:keyCode (.-keyCode e)}
always-listen-keys @(rf/subscribe [(ns-keyword "-always-listen-keys")])
always-listen? (some #(is-key? hit-key %) always-listen-keys)]
(when (or (and (not modifier-key?)
(not entering-input?))
always-listen?)
(rf/dispatch-sync [(ns-keyword "-set-key") hit-key])
(let [recent-keys @(rf/subscribe [(ns-keyword "-keys")])
event-keys @(rf/subscribe [(ns-keyword "-event-keys")])
clear-keys @(rf/subscribe [(ns-keyword "-clear-keys")])
recent-key (last recent-keys)
is-key-sequence? (fn [key-maps]
(every? true?
(mapv
#(is-key? %1 %2)
(concat (reverse recent-keys)
(repeat max-record {}))
(reverse key-maps))))
check-events (doall
(for [[trigger-event
& ks] event-keys]
(let [triggered? (some is-key-sequence? ks)]
(vector trigger-event triggered?))))
[triggered-event
event?] (some->> check-events
(filter #(true? (second %)))
first)
clear? (some is-key-sequence? clear-keys)]
(when (= "keydown" event-type)
(let [prevent-default-keys @(rf/subscribe [(ns-keyword "-prevent-default-keys")])
prevent-default? (some #(is-key? recent-key %) prevent-default-keys)]
(when prevent-default?
(rf/dispatch-sync [(ns-keyword "-prevent-default-keys")
e]))))
(cond
clear?
(rf/dispatch-sync [(ns-keyword "-clear-keys")])
event?
(do
(when clear-on-success-event-match
(rf/dispatch-sync [(ns-keyword "-clear-keys")]))
(rf/dispatch-sync (conj triggered-event
e
recent-keys)))
:else nil)))))))))