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127 lines
4 KiB
CoffeeScript
127 lines
4 KiB
CoffeeScript
React = require 'react'
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{Actions} = require("nylas-exports")
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CalendarBarItem = require("./calendar-bar-item")
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CalendarBarEventStore = require ("./calendar-bar-event-store")
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class CalendarBarRow
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constructor: (initialItem = null) ->
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@items = []
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@last = 0
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if initialItem
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@last = initialItem.event.end
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@items.push(initialItem)
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canHoldItem: (item) =>
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item.event.start > @last
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addItem: (item) =>
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@last = item.event.end
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@items.push(item)
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class CalendarBarMarker extends React.Component
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@displayName: "CalendarBarMarker"
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render: =>
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classname = "marker"
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classname += " now" if @props.marker.now
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<div className={classname} style={left: @props.marker.xPercent} id={@props.marker.xPercent}/>
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class CalendarBar extends React.Component
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@displayName: "CalendarBar"
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constructor: (@props) ->
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@state = @_getStateFromStores()
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componentDidMount: =>
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@unsubscribe = CalendarBarEventStore.listen @_onStoreChange
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# It's important that every React class explicitly stops listening to
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# atom events before it unmounts. Thank you event-kit
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# This can be fixed via a Reflux mixin
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componentWillUnmount: =>
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@unsubscribe() if @unsubscribe
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render: =>
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markers = @_getMarkers().map (marker) ->
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<CalendarBarMarker marker={marker}/>
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items = @_getItemsForEvents(@state.events)
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items = items.map (item) ->
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<CalendarBarItem item={item}/>
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<div className="calendar-bar-inner">
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{markers}
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{items}
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</div>
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_onStoreChange: =>
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@setState @_getStateFromStores()
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_getStateFromStores: =>
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events: CalendarBarEventStore.events()
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range: CalendarBarEventStore.range()
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_getMarkers: =>
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range = @state.range
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now = (new Date).getTime()/1000 - range.start
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markers = []
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for hour in [0..24]
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time = 60*60*hour
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markers.push
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xPercent: (time * 100) / (range.end - range.start) + "%"
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markers.push
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now: true
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xPercent: (now * 100) / (range.end - range.start) + "%"
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markers
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_getItemsForEvents: (events) =>
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# Create an array of items with additional metadata needed for our view.
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# We compute the X and width of elements using their durations as a fraction
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# of the displayed range
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range = @state.range
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items = events.map (event) ->
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{
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event: event,
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z: event.start - range.start
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xPercent: (event.start - range.start) * 100 / (range.end - range.start) + "%",
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wPercent: (event.end - event.start) * 100 / (range.end - range.start) + "%"
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}
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# Compute the number of rows we need by assigning events to rows. This works by
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# creating virtual "row" objects which hold a series of non-overlapping events and
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# have a "last" timestamp. For each item, we iterate through the rows:
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#
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# - If the event fits in more than one row, we delete all but one of the rows.
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# This ensures that if we have two overlapping events, the next event that
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# does not overlap goes back to taking all of the available height. (Rows no
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# longer necessary)
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#
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# - If the event does not fit in any rows, we create a new row, and tell all of
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# the items in existing rows that they're now sharing space with a new row.
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rows = [new CalendarBarRow]
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for item in items
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for x in [rows.length-1..0] by -1
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if rows[x].canHoldItem(item)
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rows.splice(item.rowIndex, 1) unless item.rowIndex is undefined
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rows[x].addItem(item)
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item.rowIndex = x
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if item.rowIndex is undefined
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rows.push(new CalendarBarRow(item))
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item.rowIndex = rows.length - 1
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for row in rows
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for item in row.items
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item.rowCount += 1
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item.rowCount = rows.length
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# Now that each item knows what row it's in and how many rows are being displayed
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# alongside it, we can assign fractional positions to them.
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for item in items
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item.yPercent = (item.rowIndex / item.rowCount) * 100 + "%"
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item.hPercent = (100.0 / item.rowCount) + "%"
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items
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module.exports = CalendarBar
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