Preserve buffer contents for unsaved files when reloading

spec/app/edit-session-spec.coffee

@@ -2059,6 +2059,10 @@ describe "EditSession", ->
       editSession.setCursorScreenPosition([0, 1])
       editSession.buffer.reload()
       expect(editSession.getCursorScreenPosition()).toEqual [0,1]
+    it "preserves the current state if the file was not saved yet", ->
+      editSession = project.buildEditSessionFromState('test', autoIndent: false)
+      editSession = EditSession.deserialize(editSession.serialize())
+      expect(editSession.buffer.getText()).toBe('test')
 
   describe "when the 'grammars-loaded' event is triggered on the syntax global", ->
     it "reloads the edit session's grammar and re-tokenizes the buffer if it changes", ->

src/app/edit-session.coffee

@@ -17,6 +17,8 @@ class EditSession
   @deserialize: (state) ->
     if fs.exists(state.buffer)
       session = project.buildEditSession(state.buffer)
+    else if state.unsavedState
+      session = project.buildEditSessionFromState(state.unsavedState)
     else
       console.warn "Could not build edit session for path '#{state.buffer}' because that file no longer exists" if state.buffer
       session = project.buildEditSession(null)
@@ -92,6 +94,7 @@ class EditSession
     scrollTop: @getScrollTop()
     scrollLeft: @getScrollLeft()
     cursorScreenPosition: @getCursorScreenPosition().serialize()
+    unsavedState: @buffer.getText() if !@buffer.fileExists()
 
   copy: ->
     EditSession.deserialize(@serialize(), @project)

src/app/project.coffee

@@ -87,6 +87,9 @@ class Project
   buildEditSession: (filePath, editSessionOptions={}) ->
     @buildEditSessionForBuffer(@bufferForPath(filePath), editSessionOptions)
 
+  buildEditSessionFromState: (state, editSessionOptions={}) ->
+    @buildEditSessionForBuffer(@bufferForState(state), editSessionOptions)
+
   buildEditSessionForBuffer: (buffer, editSessionOptions) ->
     options = _.extend(@defaultEditSessionOptions(), editSessionOptions)
     options.project = this
@@ -138,6 +141,11 @@ class Project
     else
       @buildBuffer()
 
+  bufferForState: (state) ->
+    buffer = @buildBuffer()
+    buffer.setText(state) if state
+    buffer
+
   buildBuffer: (filePath) ->
     buffer = new Buffer(filePath, this)
     @buffers.push buffer

src/app/text-buffer.coffee

@@ -445,7 +445,7 @@ class Buffer
     @trigger 'modified-status-changed', modifiedStatus
 
   fileExists: ->
-    @file.exists()
+    @file? && @file.exists()
 
   logLines: (start=0, end=@getLastRow())->
     for row in [start..end]