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import React, { Component } from 'react'
// import { Link } from 'react-router-dom'
import { connect } from 'react-redux'
import actions from 'app/actions'
import Annotations from 'app/views/align/containers/annotations.container'
import Waveform from 'app/views/align/components/timeline/waveform.component'
import Ticks from 'app/views/align/components/timeline/ticks.component'
import Cursor from 'app/views/align/components/timeline/cursor.component'
import PlayCursor from 'app/views/align/components/timeline/playCursor.component'
import { WAVEFORM_SIZE, ZOOM_STEPS, INNER_HEIGHT } from 'app/constants'
import { clamp } from 'app/utils'
import { positionToTime } from 'app/utils/align.utils'
class Timeline extends Component {
constructor(props){
super(props)
this.handleKeydown = this.handleKeydown.bind(this)
this.handleMouseMove = this.handleMouseMove.bind(this)
this.handleWheel = this.handleWheel.bind(this)
this.handleContainerClick = this.handleContainerClick.bind(this)
this.handleTimelineClick = this.handleTimelineClick.bind(this)
}
componentDidMount() {
this.bind()
}
componentWillUnmount() {
this.unbind()
}
shouldComponentUpdate(nextProps) {
return (
nextProps.timeline !== this.props.timeline ||
nextProps.annotation !== this.props.annotation
)
}
bind() {
document.addEventListener('keydown', this.handleKeydown)
}
unbind() {
document.removeEventListener('keydown', this.handleKeydown)
}
handleKeydown(e) {
if (document.activeElement !== document.body) {
return
}
// console.log(e.keyCode)
if (e.metaKey && this.props.selectedAnnotation.id) {
const { selectedAnnotation } = this.props
switch (e.keyCode) {
case 38: // up
e.preventDefault()
selectedAnnotation.start_ts = Math.max(selectedAnnotation.start_ts - (e.shiftKey ? 1 : 0.1), 0)
actions.align.updateSelectedAnnotation(selectedAnnotation)
actions.audio.seek(selectedAnnotation.start_ts)
actions.align.setCursor(selectedAnnotation.start_ts)
break
case 40: // down
e.preventDefault()
selectedAnnotation.start_ts += e.shiftKey ? 1 : 0.1
actions.align.updateSelectedAnnotation(selectedAnnotation)
actions.audio.seek(selectedAnnotation.start_ts)
actions.align.setCursor(selectedAnnotation.start_ts)
break
}
return
}
if (e.shiftKey) {
switch (e.keyCode) {
case 187: // plus
actions.align.setZoom(this.props.timeline.zoom - 1)
break
case 189: // minus
actions.align.setZoom(this.props.timeline.zoom + 1)
break
}
} else {
// console.log(e.keyCode)
switch (e.keyCode) {
case 27: // escape
actions.align.hideAnnotationForm()
break
case 65: // A - add
e.preventDefault()
actions.align.showNewAnnotationForm(this.props.audio.play_ts, this.props.text)
break
case 32: // spacebar
actions.audio.toggle()
break
case 38: // up
actions.audio.jump(- ZOOM_STEPS[this.props.timeline.zoom] * 0.1)
break
case 40: // down
actions.audio.jump(ZOOM_STEPS[this.props.timeline.zoom] * 0.1)
break
}
}
}
handleWheel(e) {
let { start_ts, zoom, duration } = this.props.timeline
let { deltaY } = e
let secondsPerPixel = ZOOM_STEPS[zoom] * 0.1 // 0.1 sec / step
let widthTimeDuration = INNER_HEIGHT * secondsPerPixel // secs per pixel
start_ts += Math.round((deltaY) * ZOOM_STEPS[zoom])
start_ts = clamp(start_ts, 0, Math.max(0, duration - widthTimeDuration / 2))
if (e.shiftKey) {
if (Math.abs(deltaY) < 2) return
if (e.deltaY > 0) {
actions.align.throttledSetZoom(this.props.timeline.zoom + 1)
} else {
actions.align.throttledSetZoom(this.props.timeline.zoom - 1)
}
} else if (e.altKey) {
actions.audio.jump(e.deltaY * ZOOM_STEPS[zoom])
} else {
actions.align.setScrollPosition(start_ts)
}
}
handleMouseMove(e) {
const cursor_ts = positionToTime(e.pageY, this.props.timeline)
actions.align.setCursor(cursor_ts)
}
handleContainerClick(e) {
actions.align.clearSelectedAnnotation()
actions.align.clearSelectedParagraph()
}
handleTimelineClick(e) {
const play_ts = positionToTime(e.pageY, this.props.timeline)
if (e.metaKey) {
actions.align.spliceTime(play_ts)
} else if (e.pageX < WAVEFORM_SIZE * 0.67) {
actions.audio.seek(play_ts)
} else {
actions.align.showNewAnnotationForm(play_ts, this.props.text)
}
}
render() {
return (
<div
className='timeline'
onClick={this.handleContainerClick}
onWheel={this.handleWheel}
onMouseMove={this.handleMouseMove}
>
<div className='timelineColumn'>
<Waveform onClick={this.handleTimelineClick} />
<Ticks timeline={this.props.timeline} />
<Cursor timeline={this.props.timeline} annotation={this.props.annotation} />
</div>
<Annotations timeline={this.props.timeline} />
<PlayCursor />
</div>
)
}
}
const mapStateToProps = state => ({
timeline: state.align.timeline,
annotation: state.align.annotation,
selectedAnnotation: state.align.selectedAnnotation,
audio: state.audio,
text: state.site.text,
})
export default connect(mapStateToProps)(Timeline)
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