36c260f4d5
It seems that it's avoidable to make callback cross-process when we start to emitting events for GUI elements, without this feature our implementation will be much more complicated. I will find a way to warn about resources leak in browser.
122 lines
4.1 KiB
CoffeeScript
122 lines
4.1 KiB
CoffeeScript
ipc = require 'ipc'
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v8_util = process.atomBinding 'v8_util'
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nextCallbackId = 0
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storedCallbacks = {}
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storeCallback = (callback) ->
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++nextCallbackId
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storedCallbacks[nextCallbackId] = callback
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nextCallbackId
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makeCallback = (id, args) ->
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storedCallbacks[id].apply global, args
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releaseCallback = (id) ->
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delete storedCallbacks[id]
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# Transform the arguments passed to browser into list of descriptions.
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#
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# This function assumes an array is passed, and it only converts remote objects
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# and functions, other types of values are passed as it is.
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wrapArgs = (args) ->
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Array::slice.call(args).map (value) ->
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if typeof value is 'object' and v8_util.getHiddenValue value, 'isRemoteObject'
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type: 'remoteObject', id: value.id
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else if typeof value is 'function'
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type: 'function', id: storeCallback(value)
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else
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type: 'value', value: value
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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, wrapArgs(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, wrapArgs(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, wrapArgs(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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# Mark this is a remote object.
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v8_util.setHiddenValue ret, 'isRemoteObject', true
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ret
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ipc.on 'ATOM_RENDERER_CALLBACK', (id, args) ->
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makeCallback id, metaToValue(args)
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ipc.on 'ATOM_RENDERER_RELEASE_CALLBACK', (id) ->
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releaseCallback id
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# Release all resources of current render view when it's going to be unloaded.
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window.addEventListener 'unload', (event) ->
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ipc.sendChannelSync 'ATOM_BROWSER_RELEASE_RENDER_VIEW'
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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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windowCache = null
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exports.getCurrentWindow = ->
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return windowCache if windowCache?
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meta = ipc.sendChannelSync 'ATOM_BROWSER_CURRENT_WINDOW'
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windowCache = metaToValue meta
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# Get a global object in browser.
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exports.getGlobal = (name) ->
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meta = ipc.sendChannelSync 'ATOM_BROWSER_GLOBAL', name
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metaToValue meta
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# Get the process object in browser.
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processCache = null
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exports.__defineGetter__ 'process', ->
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processCache = exports.getGlobal('process') unless processCache?
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processCache
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