105 lines
3.6 KiB
CoffeeScript
105 lines
3.6 KiB
CoffeeScript
ipc = require 'ipc'
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IDWeakMap = require 'id_weak_map'
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v8_util = process.atomBinding 'v8_util'
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class CallbacksRegistry
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constructor: ->
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@referencesMap = {}
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@weakMap = new IDWeakMap
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get: (id) -> @weakMap.get id
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remove: (id) -> delete @referencesMap[id]
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add: (callback) ->
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id = @weakMap.add callback
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@referencesMap[id] = callback
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id
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# Translate arguments object into a list of meta data.
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# Unlike the Meta class in browser, this function only create delegate object
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# for functions, other types of value are transfered after serialization.
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callbacksRegistry = new CallbacksRegistry
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argumentsToMetaList = (args) ->
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metas = []
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for arg in args
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if typeof arg is 'function'
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metas.push type: 'function', id: callbacksRegistry.add(arg)
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else
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metas.push type: 'value', value: arg
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metas
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# Transform the description of value into a value or delegate object.
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metaToValue = (meta) ->
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switch meta.type
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when 'error' then throw new Error(meta.value)
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when 'value' then meta.value
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when 'array' then (metaToValue(el) for el in meta.members)
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else
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if meta.type is 'function'
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# A shadow class to represent the remote function object.
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ret =
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class RemoteFunction
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constructor: ->
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if @constructor == RemoteFunction
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# Constructor call.
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obj = ipc.sendChannelSync 'ATOM_BROWSER_CONSTRUCTOR', meta.id, argumentsToMetaList(arguments)
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# Returning object in constructor will replace constructed object
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# with the returned object.
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# http://stackoverflow.com/questions/1978049/what-values-can-a-constructor-return-to-avoid-returning-this
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return metaToValue obj
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else
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# Function call.
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ret = ipc.sendChannelSync 'ATOM_BROWSER_FUNCTION_CALL', meta.id, argumentsToMetaList(arguments)
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return metaToValue ret
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else
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ret = v8_util.createObjectWithName meta.name
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# Polulate delegate members.
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for member in meta.members
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do (member) ->
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if member.type is 'function'
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ret[member.name] = ->
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# Call member function.
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ret = ipc.sendChannelSync 'ATOM_BROWSER_MEMBER_CALL', meta.id, member.name, argumentsToMetaList(arguments)
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metaToValue ret
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else
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ret.__defineSetter__ member.name, (value) ->
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# Set member data.
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ipc.sendChannelSync 'ATOM_BROWSER_MEMBER_SET', meta.id, member.name, value
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ret.__defineGetter__ member.name, ->
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# Get member data.
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ret = ipc.sendChannelSync 'ATOM_BROWSER_MEMBER_GET', meta.id, member.name
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metaToValue ret
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# Track delegate object's life time, and tell the browser to clean up
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# when the object is GCed.
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v8_util.setDestructor ret, ->
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ipc.sendChannel 'ATOM_BROWSER_DEREFERENCE', meta.storeId
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ret
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# Browser calls a callback in renderer.
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ipc.on 'ATOM_RENDERER_FUNCTION_CALL', (callbackId, args) ->
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callback = callbacksRegistry.get callbackId
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callback.apply global, metaToValue(args)
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# Browser releases a callback in renderer.
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ipc.on 'ATOM_RENDERER_DEREFERENCE', (callbackId) ->
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callbacksRegistry.remove callbackId
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# Get remote module.
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exports.require = (module) ->
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meta = ipc.sendChannelSync 'ATOM_BROWSER_REQUIRE', module
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metaToValue meta
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# Get object with specified id.
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exports.getObject = (id) ->
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meta = ipc.sendChannelSync 'ATOM_BROWSER_REFERENCE', id
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metaToValue meta
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# Get current window object.
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exports.getCurrentWindow = ->
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meta = ipc.sendChannelSync 'ATOM_BROWSER_CURRENT_WINDOW'
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metaToValue meta
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