penpot/frontend/src/app/main/ui/components/numeric_input.cljs
2021-02-15 12:49:54 +01:00

122 lines
4.4 KiB
Clojure

;; This Source Code Form is subject to the terms of the Mozilla Public
;; License, v. 2.0. If a copy of the MPL was not distributed with this
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
;;
;; This Source Code Form is "Incompatible With Secondary Licenses", as
;; defined by the Mozilla Public License, v. 2.0.
;;
;; Copyright (c) 2020 UXBOX Labs SL
(ns app.main.ui.components.numeric-input
(:require
[app.common.data :as d]
[app.common.math :as math]
[app.util.dom :as dom]
[app.util.keyboard :as kbd]
[app.util.object :as obj]
[rumext.alpha :as mf]))
(mf/defc numeric-input
{::mf/wrap-props false
::mf/forward-ref true}
[props ref]
(let [value (obj/get props "value")
on-change (obj/get props "onChange")
min-val (obj/get props "min")
max-val (obj/get props "max")
wrap-value? (obj/get props "data-wrap")
stored-val (mf/use-var value)
local-ref (mf/use-ref nil)
ref (or ref local-ref)
min-val (cond-> min-val
(string? min-val) (d/parse-integer nil))
max-val (cond-> max-val
(string? max-val) (d/parse-integer nil))
num? (fn [value] (and (number? value)
(not (math/nan? value))
(math/finite? value)))
parse-value (fn [event]
(let [value (-> (dom/get-target-val event) (d/parse-integer nil))]
(when (num? value)
(cond-> value
(num? min-val) (cljs.core/max min-val)
(num? max-val) (cljs.core/min max-val)))))
handle-change
(mf/use-callback
(mf/deps on-change)
(fn [event]
(let [value (parse-value event)]
(when (and on-change (num? value))
(on-change value)))))
set-delta
(mf/use-callback
(mf/deps on-change wrap-value? min-val max-val)
(fn [event up? down?]
(let [value (parse-value event)
increment (if up? 9 -9)]
(when (and (or up? down?) (num? value))
(cond
(kbd/shift? event)
(let [new-value (+ value increment)
new-value (cond
(and wrap-value? (num? max-val) (num? min-val) (> new-value max-val) up?)
(+ min-val (- max-val new-value))
(and wrap-value? (num? min-val) (num? max-val) (< new-value min-val) down?)
(- max-val (- new-value min-val))
(and (num? min-val) (< new-value min-val)) min-val
(and (num? max-val) (> new-value max-val)) max-val
:else new-value)]
(dom/set-value! (dom/get-target event) new-value))
(and wrap-value? (num? max-val) (num? min-val) (= value max-val) up?)
(dom/set-value! (dom/get-target event) min-val)
(and wrap-value? (num? min-val) (num? max-val) (= value min-val) down?)
(dom/set-value! (dom/get-target event) max-val))))))
handle-key-down
(mf/use-callback
(mf/deps set-delta)
(fn [event]
(set-delta event (kbd/up-arrow? event) (kbd/down-arrow? event))))
handle-mouse-wheel
(mf/use-callback
(mf/deps set-delta)
(fn [event]
(set-delta event (< (.-deltaY event) 0) (> (.-deltaY event) 0))))
handle-blur
(fn [event]
(when-let [input-node (and ref (mf/ref-val ref))]
(dom/set-value! input-node @stored-val)))
props (-> props
(obj/without ["value" "onChange"])
(obj/set! "className" "input-text")
(obj/set! "type" "number")
(obj/set! "ref" ref)
(obj/set! "defaultValue" value)
(obj/set! "onWheel" handle-mouse-wheel)
(obj/set! "onKeyDown" handle-key-down)
(obj/set! "onChange" handle-change)
(obj/set! "onBlur" handle-blur))]
(mf/use-effect
(mf/deps value)
(fn []
(when-let [input-node (and ref (mf/ref-val ref))]
(if-not (dom/active? input-node)
(dom/set-value! input-node value)
(reset! stored-val value)))))
[:> :input props]))