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https://github.com/codeninjasllc/codecombat.git
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60 lines
1.7 KiB
CoffeeScript
60 lines
1.7 KiB
CoffeeScript
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# Template for classes with common functions, like hooking into the Mediator.
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utils = require './utils'
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classCount = 0
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makeScopeName = -> "class-scope-#{classCount++}"
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module.exports = class CocoClass
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subscriptions: {}
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shortcuts: {}
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# setup/teardown
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constructor: ->
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@subscriptions = utils.combineAncestralObject(@, 'subscriptions')
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@shortcuts = utils.combineAncestralObject(@, 'shortcuts')
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@listenToSubscriptions()
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@scope = makeScopeName()
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@listenToShortcuts()
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_.extend(@, Backbone.Events) if Backbone?
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destroy: ->
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# teardown subscriptions, prevent new ones
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@destroyed = true
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@stopListening?()
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@unsubscribeAll()
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@stopListeningToShortcuts()
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# subscriptions
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listenToSubscriptions: ->
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# for initting subscriptions
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return unless Backbone?.Mediator?
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for channel, func of @subscriptions
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func = utils.normalizeFunc(func, @)
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Backbone.Mediator.subscribe(channel, func, @)
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addNewSubscription: (channel, func) ->
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# this is for adding subscriptions on the fly, rather than at init
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return unless Backbone?.Mediator?
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return if @destroyed
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return unless @subscriptions[channel] is undefined
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func = utils.normalizeFunc(func, @)
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@subscriptions[channel] = func
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Backbone.Mediator.subscribe(channel, func, @)
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unsubscribeAll: ->
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for channel, func of @subscriptions
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func = utils.normalizeFunc(func, @)
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Backbone.Mediator.unsubscribe(channel, func, @)
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# keymaster shortcuts
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listenToShortcuts: ->
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return unless key?
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for shortcut, func of @shortcuts
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func = utils.normalizeFunc(func, @)
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key(shortcut, @scope, _.bind(func, @))
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stopListeningToShortcuts: ->
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return unless key?
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key.deleteScope(@scope)
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