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import filter from 'lodash/filter'
import get from 'lodash/get'
import isEmpty from 'lodash/isEmpty'
import keyBy from 'lodash/keyBy'
import times from 'lodash/times'
import PropTypes from 'prop-types'
import { useContext, useMemo, useState } from 'react'
import KeyboardLayout from './KeyboardLayout'
import LayerSelector from './LayerSelector'
import { getKeyBoundingBox } from '../key-units'
import { DefinitionsContext, SearchContext } from '../providers'
function Keyboard(props) {
const { layout, keymap, onUpdate } = props
const [activeLayer, setActiveLayer] = useState(0)
const {keycodes, behaviours} = useContext(DefinitionsContext)
const availableLayers = useMemo(() => isEmpty(keymap) ? [] : (
keymap.layers.map((_, i) => ({
code: i,
description: keymap.layer_names[i] || `Layer ${i}`
}))
), [keymap])
const sources = useMemo(() => ({
kc: keycodes.indexed,
code: keycodes.indexed,
mod: keyBy(filter(keycodes, 'isModifier'), 'code'),
behaviours: behaviours.indexed,
layer: keyBy(availableLayers, 'code')
}), [keycodes, behaviours, availableLayers])
// TODO: this may be unnecessary
const isReady = useMemo(() => function() {
return (
Object.keys(keycodes.indexed).length > 0 &&
Object.keys(behaviours.indexed).length > 0 &&
get(keymap, 'layers.length', 0) > 0
)
}, [keycodes, behaviours, keymap])
const getSearchTargets = useMemo(() => function (param, behaviour) {
// Special case for behaviour commands which can dynamically add another
// parameter that isn't defined at the root level of the behaviour.
// Currently this is just `&bt BT_SEL` and is only represented as an enum.
if (param.enum) {
return param.enum.map(v => ({ code: v }))
}
switch (param) {
case 'behaviour':
return behaviours
case 'layer':
return availableLayers
case 'mod':
return filter(keycodes, 'isModifier')
case 'command':
return get(sources, ['behaviours', behaviour, 'commands'], [])
case 'kc':
default:
return keycodes
}
}, [keycodes, behaviours, sources, availableLayers])
const boundingBox = useMemo(() => function () {
return layout.map(key => getKeyBoundingBox(
{ x: key.x, y: key.y },
{ u: key.u || key.w || 1, h: key.h || 1 },
{ x: key.rx, y: key.ry, a: key.r }
)).reduce(({ x, y }, { max }) => ({
x: Math.max(x, max.x),
y: Math.max(y, max.y)
}), { x: 0, y: 0 })
}, [layout])
const getWrapperStyle = useMemo(() => function () {
const bbox = boundingBox()
return {
width: `${bbox.x}px`,
height: `${bbox.y}px`,
margin: '0 auto',
padding: '40px'
}
}, [boundingBox])
const handleCreateLayer = useMemo(() => function () {
const layer = keymap.layers.length
const binding = '&trans'
const makeKeycode = () => ({ value: binding, params: [] })
const newLayer = times(layout.length, makeKeycode)
const updatedLayerNames = [ ...keymap.layer_names, `Layer #${layer}` ]
const layers = [ ...keymap.layers, newLayer ]
onUpdate({ ...keymap, layer_names: updatedLayerNames, layers })
}, [keymap, layout, onUpdate])
const handleUpdateLayer = useMemo(() => function(layerIndex, updatedLayer) {
const original = keymap.layers
const layers = [
...original.slice(0, layerIndex),
updatedLayer,
...original.slice(layerIndex + 1)
]
onUpdate({ ...keymap, layers })
}, [keymap, onUpdate])
const handleRenameLayer = useMemo(() => function (layerName) {
const layer_names = [
...keymap.layer_names.slice(0, activeLayer),
layerName,
...keymap.layer_names.slice(activeLayer + 1)
]
onUpdate({ ...keymap, layer_names })
}, [keymap, activeLayer, onUpdate])
const handleDeleteLayer = useMemo(() => function (layerIndex) {
const layer_names = [...keymap.layer_names]
layer_names.splice(layerIndex, 1)
const layers = [...keymap.layers]
layers.splice(layerIndex, 1)
setActiveLayer(Math.max(0, layers.length - 1))
onUpdate({ ...keymap, layers, layer_names })
}, [keymap, setActiveLayer, onUpdate])
return (
<>
<LayerSelector
layers={keymap.layer_names}
activeLayer={activeLayer}
onSelect={setActiveLayer}
onNewLayer={handleCreateLayer}
onRenameLayer={handleRenameLayer}
onDeleteLayer={handleDeleteLayer}
/>
<SearchContext.Provider value={{ getSearchTargets }}>
<div style={getWrapperStyle()}>
{isReady() && (
<KeyboardLayout
data-layer={activeLayer}
layout={layout}
bindings={keymap.layers[activeLayer]}
onUpdate={event => handleUpdateLayer(activeLayer, event)}
/>
)}
</div>
</SearchContext.Provider>
</>
)
}
Keyboard.propTypes = {
layout: PropTypes.array.isRequired,
keymap: PropTypes.object.isRequired,
onUpdate: PropTypes.func.isRequired
}
export default Keyboard
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