Merge pull request #2869 from atom/inherit-window-open

Inherit parent window's options in window.open

atom/browser/api/atom_api_web_contents.cc

@@ -228,7 +228,7 @@ WebContents::WebContents(v8::Isolate* isolate,
   AttachAsUserData(web_contents);
   InitWithWebContents(web_contents);
 
-  // Save the preferences.
+  // Save the preferences in C++.
   base::DictionaryValue web_preferences;
   mate::ConvertFromV8(isolate, options.GetHandle(), &web_preferences);
   new WebContentsPreferences(web_contents, &web_preferences);
@@ -887,6 +887,12 @@ bool WebContents::IsGuest() const {
   return type_ == WEB_VIEW;
 }
 
+v8::Local<v8::Value> WebContents::GetWebPreferences(v8::Isolate* isolate) {
+  WebContentsPreferences* web_preferences =
+      WebContentsPreferences::FromWebContents(web_contents());
+  return mate::ConvertToV8(isolate, *web_preferences->web_preferences());
+}
+
 mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   if (template_.IsEmpty())
@@ -942,6 +948,7 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
         .SetMethod("setSize", &WebContents::SetSize)
         .SetMethod("setAllowTransparency", &WebContents::SetAllowTransparency)
         .SetMethod("isGuest", &WebContents::IsGuest)
+        .SetMethod("getWebPreferences", &WebContents::GetWebPreferences)
         .SetMethod("hasServiceWorker", &WebContents::HasServiceWorker)
         .SetMethod("unregisterServiceWorker",
                    &WebContents::UnregisterServiceWorker)
@@ -995,7 +1002,7 @@ mate::Handle<WebContents> WebContents::CreateFrom(
 // static
 mate::Handle<WebContents> WebContents::Create(
     v8::Isolate* isolate, const mate::Dictionary& options) {
-  auto handle =  mate::CreateHandle(isolate, new WebContents(isolate, options));
+  auto handle = mate::CreateHandle(isolate, new WebContents(isolate, options));
   g_wrap_web_contents.Run(handle.ToV8());
   return handle;
 }

atom/browser/api/atom_api_web_contents.h

@@ -132,6 +132,9 @@ class WebContents : public mate::TrackableObject<WebContents>,
   void SetAllowTransparency(bool allow);
   bool IsGuest() const;
 
+  // Returns the web preferences of current WebContents.
+  v8::Local<v8::Value> GetWebPreferences(v8::Isolate* isolate);
+
  protected:
   explicit WebContents(content::WebContents* web_contents);
   WebContents(v8::Isolate* isolate, const mate::Dictionary& options);

atom/browser/api/atom_api_window.cc

@@ -82,6 +82,10 @@ Window::Window(v8::Isolate* isolate, const mate::Dictionary& options) {
   web_contents_.Reset(isolate, web_contents.ToV8());
   api_web_contents_ = web_contents.get();
 
+  // Keep a copy of the options for later use.
+  mate::Dictionary(isolate, web_contents->GetWrapper(isolate)).Set(
+      "browserWindowOptions", options);
+
   // Creates BrowserWindow.
   window_.reset(NativeWindow::Create(web_contents->managed_web_contents(),
                                      options));

atom/browser/lib/guest-window-manager.coffee

@@ -4,6 +4,17 @@ BrowserWindow = require 'browser-window'
 
 frameToGuest = {}
 
+# Merge |options| with the |embedder|'s window's options.
+mergeBrowserWindowOptions = (embedder, options) ->
+  if embedder.browserWindowOptions?
+    # Inherit the original options if it is a BrowserWindow.
+    options.__proto__ = embedder.browserWindowOptions
+  else
+    # Or only inherit web-preferences if it is a webview.
+    options['web-preferences'] ?= {}
+    options['web-preferences'].__proto__ = embedder.getWebPreferences()
+  options
+
 # Create a new guest created by |embedder| with |options|.
 createGuest = (embedder, url, frameName, options) ->
   guest = frameToGuest[frameName]
@@ -11,7 +22,7 @@ createGuest = (embedder, url, frameName, options) ->
     guest.loadUrl url
     return guest.id
 
-  guest = new BrowserWindow(options)
+  guest = new BrowserWindow(mergeBrowserWindowOptions(embedder, options))
   guest.loadUrl url
 
   # Remember the embedder, will be used by window.opener methods.

atom/browser/web_contents_preferences.cc

@@ -40,6 +40,9 @@ WebContentsPreferences::WebContentsPreferences(
     base::DictionaryValue* web_preferences) {
   web_preferences_.Swap(web_preferences);
   web_contents->SetUserData(UserDataKey(), this);
+
+  // The "isGuest" is not a preferences field.
+  web_preferences_.Remove("isGuest", nullptr);
 }
 
 WebContentsPreferences::~WebContentsPreferences() {

atom/browser/web_contents_preferences.h

@@ -37,6 +37,9 @@ class WebContentsPreferences
   // $.extend(|web_preferences_|, |new_web_preferences|).
   void Merge(const base::DictionaryValue& new_web_preferences);
 
+  // Returns the web preferences.
+  base::DictionaryValue* web_preferences() { return &web_preferences_; }
+
  private:
   friend class content::WebContentsUserData<WebContentsPreferences>;
 

docs/api/window-open.md

@@ -8,6 +8,10 @@ The proxy has limited standard functionality implemented to be
 compatible with traditional web pages. For full control of the new window
 you should create a `BrowserWindow` directly.
 
+The newly created `BrowserWindow` will inherit parent window's options by
+default, to override inherited options you can set them in the `features`
+string.
+
 ### `window.open(url[, frameName][, features])`
 
 * `url` String
@@ -16,6 +20,9 @@ you should create a `BrowserWindow` directly.
 
 Creates a new window and returns an instance of `BrowserWindowProxy` class.
 
+The `features` string follows the format of standard browser, but each feature
+has to be a field of `BrowserWindow`'s options.
+
 ### `window.opener.postMessage(message, targetOrigin)`
 
 * `message` String

spec/chromium-spec.coffee

@@ -35,6 +35,8 @@ describe 'chromium feature', ->
       assert.notEqual navigator.language, ''
 
   describe 'window.open', ->
+    @timeout 10000
+
     it 'returns a BrowserWindowProxy object', ->
       b = window.open 'about:blank', '', 'show=no'
       assert.equal b.closed, false
@@ -50,6 +52,16 @@ describe 'chromium feature', ->
       window.addEventListener 'message', listener
       b = window.open "file://#{fixtures}/pages/window-opener-node.html", '', 'node-integration=no,show=no'
 
+    it 'inherit options of parent window', (done) ->
+      listener = (event) ->
+        window.removeEventListener 'message', listener
+        b.close()
+        size = remote.getCurrentWindow().getSize()
+        assert.equal event.data, "size: #{size.width} #{size.height}"
+        done()
+      window.addEventListener 'message', listener
+      b = window.open "file://#{fixtures}/pages/window-open-size.html", '', 'show=no'
+
   describe 'window.opener', ->
     @timeout 10000
 

spec/fixtures/pages/window-open-size.html

@@ -0,0 +1,8 @@
+<html>
+<body>
+<script type="text/javascript" charset="utf-8">
+  var size = require('remote').getCurrentWindow().getSize();
+  window.opener.postMessage('size: ' + size.width + ' ' + size.height, '*')
+</script>
+</body>
+</html>