Store pathToOpen using new atom.set/getWindowState api

When you use `setWindowState`, your data is saved across refreshes.
You can only store state that can be serialized to JSON.

native/v8_extensions/native.h

@@ -7,15 +7,18 @@ namespace v8_extensions {
 class Native : public CefV8Handler {
 public:
   Native();
-    
+
   virtual bool Execute(const CefString& name,
                                       CefRefPtr<CefV8Value> object,
                                       const CefV8ValueList& arguments,
                                       CefRefPtr<CefV8Value>& retval,
                                       CefString& exception) OVERRIDE;
-    
+
   // Provide the reference counting implementation for this class.
   IMPLEMENT_REFCOUNTING(Native);
+
+private:
+  std::string windowState;
 };
 
 }

native/v8_extensions/native.js

@@ -76,4 +76,10 @@ var $native = {};
   native function getPlatform();
   $native.getPlatform = getPlatform;
 
+  native function setWindowState(state);
+  $native.setWindowState = setWindowState;
+
+  native function getWindowState();
+  $native.getWindowState = getWindowState;
+
 })();

native/v8_extensions/native.mm

@@ -31,6 +31,7 @@ void throwException(const CefRefPtr<CefV8Value>& global, CefRefPtr<CefV8Exceptio
 Native::Native() : CefV8Handler() {
   NSString *filePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"v8_extensions/native.js"];
   NSString *extensionCode = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
+  windowState = "{}";
   CefRegisterExtension("v8/native", [extensionCode UTF8String], this);
 }
 
@@ -486,6 +487,16 @@ bool Native::Execute(const CefString& name,
     return true;
   }
 
+  else if (name == "setWindowState") {
+    windowState = arguments[0]->GetStringValue().ToString();
+    return true;
+  }
+
+  else if (name == "getWindowState") {
+    retval = CefV8Value::CreateString(windowState);
+    return true;
+  }
+
   return false;
 };
 

src/app/atom.coffee

@@ -109,3 +109,16 @@ _.extend atom,
     if name is 'reply'
       [messageId, callbackIndex] = data.shift()
       @pendingBrowserProcessCallbacks[messageId]?[callbackIndex]?(data...)
+
+  setWindowState: (keyPath, value) ->
+    windowState = @getWindowState()
+    _.setValueForKeyPath(windowState, keyPath, value)
+    $native.setWindowState(JSON.stringify(windowState))
+    windowState
+
+  getWindowState: (keyPath) ->
+    windowState = JSON.parse($native.getWindowState())
+    if keyPath
+      _.valueForKeyPath(windowState, keyPath)
+    else
+      windowState

src/app/window.coffee

@@ -47,8 +47,10 @@ windowAdditions =
       false
 
   shutdown: ->
-    @rootView?.deactivate()
-    @rootView = null
+    if @rootView
+      atom.setWindowState('pathToOpen', @rootView.project.getPath())
+      @rootView.deactivate()
+      @rootView = null
     $(window).unbind('focus')
     $(window).unbind('blur')
     $(window).off('before')

src/window-bootstrap.coffee

@@ -1,4 +1,6 @@
 # Like sands through the hourglass, so are the days of our lives.
 require 'atom'
 require 'window'
-window.attachRootView(window.location.params.pathToOpen)
+
+pathToOpen = atom.getWindowState('pathToOpen') ? window.location.params.pathToOpen
+window.attachRootView(pathToOpen)