api: Add webContent.create() to create detached WebContents

atom/browser/api/atom_api_web_contents.cc

@@ -4,6 +4,7 @@
 
 #include "atom/browser/api/atom_api_web_contents.h"
 
+#include "atom/browser/atom_browser_context.h"
 #include "atom/common/api/api_messages.h"
 #include "atom/common/native_mate_converters/gurl_converter.h"
 #include "atom/common/native_mate_converters/string16_converter.h"
@@ -13,8 +14,11 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "native_mate/dictionary.h"
 #include "native_mate/object_template_builder.h"
 
+#include "atom/common/node_includes.h"
+
 namespace atom {
 
 namespace api {
@@ -26,8 +30,20 @@ v8::Persistent<v8::ObjectTemplate> template_;
 }  // namespace
 
 WebContents::WebContents(content::WebContents* web_contents)
-    : content::WebContentsObserver(web_contents),
-      web_contents_(web_contents) {
+    : content::WebContentsObserver(web_contents) {
+}
+
+WebContents::WebContents(const mate::Dictionary& options) {
+  content::WebContents::CreateParams params(AtomBrowserContext::Get());
+  bool is_guest;
+  if (options.Get("isGuest", &is_guest) && is_guest)
+    params.guest_delegate = this;
+
+  storage_.reset(content::WebContents::Create(params));
+  Observe(storage_.get());
+}
+
+WebContents::~WebContents() {
 }
 
 void WebContents::RenderViewDeleted(content::RenderViewHost* render_view_host) {
@@ -75,10 +91,17 @@ bool WebContents::OnMessageReceived(const IPC::Message& message) {
 
 void WebContents::WebContentsDestroyed() {
   // The RenderViewDeleted was not called when the WebContents is destroyed.
-  RenderViewDeleted(web_contents_->GetRenderViewHost());
+  RenderViewDeleted(web_contents()->GetRenderViewHost());
   Emit("destroyed");
 }
 
+void WebContents::Destroy() {
+  if (storage_) {
+    Observe(nullptr);
+    storage_.reset();
+  }
+}
+
 bool WebContents::IsAlive() const {
   return web_contents() != NULL;
 }
@@ -174,6 +197,7 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   if (template_.IsEmpty())
     template_.Reset(isolate, mate::ObjectTemplateBuilder(isolate)
+        .SetMethod("destroy", &WebContents::Destroy)
         .SetMethod("isAlive", &WebContents::IsAlive)
         .SetMethod("loadUrl", &WebContents::LoadURL)
         .SetMethod("getUrl", &WebContents::GetURL)
@@ -215,11 +239,31 @@ void WebContents::OnRendererMessageSync(const base::string16& channel,
 }
 
 // static
-mate::Handle<WebContents> WebContents::Create(
+mate::Handle<WebContents> WebContents::CreateFrom(
     v8::Isolate* isolate, content::WebContents* web_contents) {
   return mate::CreateHandle(isolate, new WebContents(web_contents));
 }
 
+// static
+mate::Handle<WebContents> WebContents::Create(
+    v8::Isolate* isolate, const mate::Dictionary& options) {
+  return mate::CreateHandle(isolate, new WebContents(options));
+}
+
 }  // namespace api
 
 }  // namespace atom
+
+
+namespace {
+
+void Initialize(v8::Handle<v8::Object> exports, v8::Handle<v8::Value> unused,
+                v8::Handle<v8::Context> context, void* priv) {
+  v8::Isolate* isolate = context->GetIsolate();
+  mate::Dictionary dict(isolate, exports);
+  dict.SetMethod("create", &atom::api::WebContents::Create);
+}
+
+}  // namespace
+
+NODE_MODULE_CONTEXT_AWARE_BUILTIN(atom_browser_web_contents, Initialize)

atom/browser/api/atom_api_web_contents.h

@@ -6,19 +6,31 @@
 #define ATOM_BROWSER_API_ATOM_API_WEB_CONTENTS_H_
 
 #include "atom/browser/api/event_emitter.h"
+#include "content/public/browser/browser_plugin_guest_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "native_mate/handle.h"
 
+namespace mate {
+class Dictionary;
+}
+
 namespace atom {
 
 namespace api {
 
 class WebContents : public mate::EventEmitter,
+                    public content::BrowserPluginGuestDelegate,
                     public content::WebContentsObserver {
  public:
-  static mate::Handle<WebContents> Create(v8::Isolate* isolate,
-                                          content::WebContents* web_contents);
+  // Create from an existing WebContents.
+  static mate::Handle<WebContents> CreateFrom(
+      v8::Isolate* isolate, content::WebContents* web_contents);
 
+  // Create a new WebContents.
+  static mate::Handle<WebContents> Create(
+      v8::Isolate* isolate, const mate::Dictionary& options);
+
+  void Destroy();
   bool IsAlive() const;
   void LoadURL(const GURL& url);
   GURL GetURL() const;
@@ -44,6 +56,8 @@ class WebContents : public mate::EventEmitter,
 
  protected:
   explicit WebContents(content::WebContents* web_contents);
+  explicit WebContents(const mate::Dictionary& options);
+  ~WebContents();
 
   // mate::Wrappable implementations:
   virtual mate::ObjectTemplateBuilder GetObjectTemplateBuilder(
@@ -71,7 +85,8 @@ class WebContents : public mate::EventEmitter,
                              const base::ListValue& args,
                              IPC::Message* message);
 
-  content::WebContents* web_contents_;  // Weak.
+  // Stores the WebContents that managed by this class.
+  scoped_ptr<content::WebContents> storage_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContents);
 };

atom/browser/api/atom_api_window.cc

@@ -375,12 +375,12 @@ void Window::SetProgressBar(double progress) {
 }
 
 mate::Handle<WebContents> Window::GetWebContents(v8::Isolate* isolate) const {
-  return WebContents::Create(isolate, window_->GetWebContents());
+  return WebContents::CreateFrom(isolate, window_->GetWebContents());
 }
 
 mate::Handle<WebContents> Window::GetDevToolsWebContents(
     v8::Isolate* isolate) const {
-  return WebContents::Create(isolate, window_->GetDevToolsWebContents());
+  return WebContents::CreateFrom(isolate, window_->GetDevToolsWebContents());
 }
 
 // static

atom/browser/api/lib/web-contents.coffee

@@ -1,4 +1,5 @@
 EventEmitter = require('events').EventEmitter
+binding = process.atomBinding 'web_contents'
 ipc = require 'ipc'
 
 module.exports.wrap = (webContents) ->
@@ -40,3 +41,11 @@ module.exports.wrap = (webContents) ->
     ipc.emit channel, event, args...
 
   webContents
+
+module.exports.create = (options={}) ->
+  webContents = @wrap binding.create(options)
+
+  # Ensure the webContents is destroyed on exit.
+  process.on 'exit', -> webContents.destroy()
+
+  webContents

atom/common/node_bindings.cc

@@ -68,6 +68,7 @@ REFERENCE_MODULE(atom_browser_power_monitor);
 REFERENCE_MODULE(atom_browser_protocol);
 REFERENCE_MODULE(atom_browser_global_shortcut);
 REFERENCE_MODULE(atom_browser_tray);
+REFERENCE_MODULE(atom_browser_web_contents);
 REFERENCE_MODULE(atom_browser_window);
 REFERENCE_MODULE(atom_common_asar);
 REFERENCE_MODULE(atom_common_clipboard);