[Blimp] Adds Blimp EngineSession and ClientSession skeleton

blimp/engine/browser/blimp_engine_session.cc

Index: blimp/engine/browser/blimp_engine_session.cc
diff --git a/blimp/engine/browser/blimp_engine_session.cc b/blimp/engine/browser/blimp_engine_session.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d75bddc675dc7582d582c76ef3eaaa002dd3eb53
--- /dev/null
+++ b/blimp/engine/browser/blimp_engine_session.cc
@@ -0,0 +1,166 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "blimp/engine/browser/blimp_engine_session.h"
+
+#include "blimp/common/proto/blimp_message.pb.h"
+#include "blimp/common/proto/control.pb.h"
+#include "blimp/engine/browser/blimp_browser_context.h"
+#include "blimp/engine/ui/blimp_screen.h"
+#include "blimp/net/blimp_client_session.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_widget_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace blimp {
+namespace engine {
+
+BlimpEngineSession::BlimpEngineSession(
+    scoped_ptr<BlimpBrowserContext> browser_context)
+    : browser_context_(browser_context.Pass()), screen_(new BlimpScreen) {}
+
+BlimpEngineSession::~BlimpEngineSession() {}
+
+void BlimpEngineSession::Initialize() {
+  DCHECK(!gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE));
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
+}
+
+void BlimpEngineSession::AttachClientSession(
+    scoped_ptr<BlimpClientSession> client_session) {
+  // TODO(haibinlu): auto detaches existing client session.
+  if (!client_session) {
+    NOTIMPLEMENTED();
+    return;
+  }
+
+  client_session_ = client_session.Pass();
+
+  // TODO(haibinlu): remove this once we can use client session to send in
+  // a navigation message.
+  BlimpMessage message;
+  message.set_type(BlimpMessage::CONTROL);
+  message.mutable_control()->set_type(ControlMessage::CREATE_TAB);
+  OnBlimpMessage(message);
+  message.mutable_control()->set_type(ControlMessage::LOAD_URL);
+  message.mutable_control()->mutable_load_url()->set_url(
+      "https://www.google.com/");
+  OnBlimpMessage(message);
+}
+
+void BlimpEngineSession::CreateWebContents(const int target_tab_id) {
+  if (web_contents_) {
+    // only one web_contents is supported for blimp 0.5
+    NOTIMPLEMENTED();
+    return;
+  }
+
+  content::WebContents::CreateParams create_params(browser_context_.get(),
+                                                   nullptr);
+  scoped_ptr<content::WebContents> new_contents =
+      make_scoped_ptr(content::WebContents::Create(create_params));
+  PlatformSetContents(new_contents.Pass());
+}
+
+void BlimpEngineSession::LoadUrl(const int target_tab_id, const GURL& url) {
+  if (url.is_empty() || !web_contents_)
+    return;
+
+  content::NavigationController::LoadURLParams params(url);
+  params.transition_type = ui::PageTransitionFromInt(
+      ui::PAGE_TRANSITION_TYPED | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR);
+  web_contents_->GetController().LoadURLWithParams(params);
+  web_contents_->Focus();
+}
+
+net::Error BlimpEngineSession::OnBlimpMessage(const BlimpMessage& message) {
+  DCHECK(message.type() == BlimpMessage::CONTROL);
+
+  switch (message.control().type()) {
+    case ControlMessage::CREATE_TAB:
+      CreateWebContents(message.target_tab_id());
+      break;
+    case ControlMessage::LOAD_URL:
+      LoadUrl(message.target_tab_id(),
+              GURL(message.control().load_url().url()));
+      break;
+    default:
+      NOTIMPLEMENTED();
+  }
+
+  return net::OK;
+}
+
+void BlimpEngineSession::AddNewContents(content::WebContents* source,
+                                        content::WebContents* new_contents,
+                                        WindowOpenDisposition disposition,
+                                        const gfx::Rect& initial_rect,
+                                        bool user_gesture,
+                                        bool* was_blocked) {
+  NOTIMPLEMENTED();
+}
+
+content::WebContents* BlimpEngineSession::OpenURLFromTab(
+    content::WebContents* source,
+    const content::OpenURLParams& params) {
+  // CURRENT_TAB is the only one we implement for now.
+  if (params.disposition != CURRENT_TAB) {
+    // TODO(haibinlu): handle other disposition properly.
+    NOTIMPLEMENTED();
+    return nullptr;
+  }
+  // TOOD(haibinlu): add helper method to get LoadURLParams from OpenURLParams.
+  content::NavigationController::LoadURLParams load_url_params(params.url);
+  load_url_params.source_site_instance = params.source_site_instance;
+  load_url_params.referrer = params.referrer;
+  load_url_params.frame_tree_node_id = params.frame_tree_node_id;
+  load_url_params.transition_type = params.transition;
+  load_url_params.extra_headers = params.extra_headers;
+  load_url_params.should_replace_current_entry =
+      params.should_replace_current_entry;
+
+  if (params.transferred_global_request_id != content::GlobalRequestID()) {
+    // The navigation as being transferred from one RVH to another.
+    // Copies the request ID of the old request.
+    load_url_params.is_renderer_initiated = params.is_renderer_initiated;
+    load_url_params.transferred_global_request_id =
+        params.transferred_global_request_id;
+  } else if (params.is_renderer_initiated) {
+    load_url_params.is_renderer_initiated = true;
+  }
+
+  source->GetController().LoadURLWithParams(load_url_params);
+  return source;
+}
+
+void BlimpEngineSession::RequestToLockMouse(content::WebContents* web_contents,
+                                            bool user_gesture,
+                                            bool last_unlocked_by_target) {
+  web_contents->GotResponseToLockMouseRequest(true);
+}
+
+void BlimpEngineSession::CloseContents(content::WebContents* source) {
+  if (source == web_contents_)
+    web_contents_.reset();
+}
+
+void BlimpEngineSession::ActivateContents(content::WebContents* contents) {
+  contents->GetRenderViewHost()->GetWidget()->Focus();
+}
+
+void BlimpEngineSession::DeactivateContents(content::WebContents* contents) {
+  contents->GetRenderViewHost()->GetWidget()->Blur();
+}
+
+void BlimpEngineSession::PlatformSetContents(
+    scoped_ptr<content::WebContents> new_contents) {
+  new_contents->SetDelegate(this);
+  web_contents_ = new_contents.Pass();
+}
+
+}  // namespace engine
+}  // namespace blimp