Add 1.0 preview mode bridge Model class

src/atom.coffee

@@ -8,7 +8,6 @@ shell = require 'shell'
 _ = require 'underscore-plus'
 {deprecate, includeDeprecations} = require 'grim'
 {CompositeDisposable, Emitter} = require 'event-kit'
-{Model} = require 'theorist'
 fs = require 'fs-plus'
 {convertStackTrace, convertLine} = require 'coffeestack'
 
@@ -16,13 +15,16 @@ fs = require 'fs-plus'
 WindowEventHandler = require './window-event-handler'
 StylesElement = require './styles-element'
 
-SuperClass = if includeDeprecations then Model else Object
+if includeDeprecations
+  {Model} = require 'theorist'
+else
+  Model = require './model'
 
 # Essential: Atom global for dealing with packages, themes, menus, and the window.
 #
 # An instance of this class is always available as the `atom` global.
 module.exports =
-class Atom extends SuperClass
+class Atom extends Model
   @version: 1  # Increment this when the serialization format changes
 
   # Load or create the Atom environment in the given mode.

src/model.coffee

@@ -0,0 +1,27 @@
+PropertyAccessors = require 'property-accessors'
+
+nextInstanceId = 1
+
+module.exports =
+class Model
+  PropertyAccessors.includeInto(this)
+
+  @resetNextInstanceId: -> nextInstanceId = 1
+
+  constructor: (params) ->
+    @assignId(params?.id)
+
+  assignId: (id) ->
+    @id ?= id ? nextInstanceId++
+
+  @::advisedAccessor 'id',
+    set: (id) -> nextInstanceId = id + 1 if id >= nextInstanceId
+
+  destroy: ->
+    return unless @isAlive()
+    @alive = false
+    @destroyed?()
+
+  isAlive: -> @alive
+
+  isDestroyed: -> not @isAlive()