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62 lines
2.0 KiB
CoffeeScript
62 lines
2.0 KiB
CoffeeScript
React = require 'react-atom-fork'
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{div} = require 'reactionary-atom-fork'
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{debounce, toArray, isEqualForProperties, isEqual} = require 'underscore-plus'
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SubscriberMixin = require './subscriber-mixin'
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CursorComponent = require './cursor-component'
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module.exports =
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CursorsComponent = React.createClass
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displayName: 'CursorsComponent'
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mixins: [SubscriberMixin]
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cursorBlinkIntervalHandle: null
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render: ->
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{cursorPixelRects, scrollTop, scrollLeft, defaultCharWidth, useHardwareAcceleration} = @props
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{blinkOff} = @state
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className = 'cursors'
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className += ' blink-off' if blinkOff
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div {className},
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if @isMounted()
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for key, pixelRect of cursorPixelRects
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CursorComponent({key, pixelRect, scrollTop, scrollLeft, defaultCharWidth, useHardwareAcceleration})
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getInitialState: ->
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blinkOff: false
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componentDidMount: ->
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@startBlinkingCursors()
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componentWillUnmount: ->
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@stopBlinkingCursors()
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shouldComponentUpdate: (newProps, newState) ->
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not newState.blinkOff is @state.blinkOff or
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not isEqualForProperties(newProps, @props, 'cursorPixelRects', 'scrollTop', 'scrollLeft', 'defaultCharWidth', 'useHardwareAcceleration')
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componentWillUpdate: (newProps) ->
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cursorsMoved = @props.cursorPixelRects? and
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isEqualForProperties(newProps, @props, 'defaultCharWidth', 'scopedCharacterWidthsChangeCount') and
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not isEqual(newProps.cursorPixelRects, @props.cursorPixelRects)
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@pauseCursorBlinking() if cursorsMoved
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startBlinkingCursors: ->
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@toggleCursorBlinkHandle = setInterval(@toggleCursorBlink, @props.cursorBlinkPeriod / 2) if @isMounted()
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startBlinkingCursorsAfterDelay: null # Created lazily
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stopBlinkingCursors: ->
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clearInterval(@toggleCursorBlinkHandle)
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toggleCursorBlink: ->
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@setState(blinkOff: not @state.blinkOff)
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pauseCursorBlinking: ->
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@state.blinkOff = false
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@stopBlinkingCursors()
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@startBlinkingCursorsAfterDelay ?= debounce(@startBlinkingCursors, @props.cursorBlinkResumeDelay)
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@startBlinkingCursorsAfterDelay()
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