Wires up view manager to an actual display

mojo/services/view_manager/root_view_manager.cc

+// Copyright 2014 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 "mojo/services/view_manager/root_view_manager.h"
+
+#include "base/auto_reset.h"
+#include "mojo/aura/screen_mojo.h"
+#include "mojo/aura/window_tree_host_mojo.h"
+#include "mojo/public/cpp/bindings/allocation_scope.h"
+#include "mojo/public/interfaces/shell/shell.mojom.h"
+#include "mojo/services/view_manager/root_node_manager.h"
+#include "ui/aura/client/default_capture_client.h"
+#include "ui/aura/client/window_tree_client.h"
+
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
+#include "ui/base/hit_test.h"
+#include "ui/gfx/canvas.h"
+
+namespace mojo {
+namespace services {
+namespace view_manager {
+
+// Trivial WindowDelegate implementation that draws a colored background.
+class WindowDelegateImpl : public aura::WindowDelegate {

[Ben Goodger (Google), 2014/05/07 17:21:36]

this doesn't appear to be used?

[sky, 2014/05/07 17:33:22]

Done.

+ public:
+  explicit WindowDelegateImpl(SkColor color) : color_(color) {}
+
+  // Overridden from WindowDelegate:
+  virtual gfx::Size GetMinimumSize() const OVERRIDE {
+    return gfx::Size();
+  }
+
+  virtual gfx::Size GetMaximumSize() const OVERRIDE {
+    return gfx::Size();
+  }
+
+  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
+                               const gfx::Rect& new_bounds) OVERRIDE {}
+  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
+    return gfx::kNullCursor;
+  }
+  virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE {
+    return HTCAPTION;
+  }
+  virtual bool ShouldDescendIntoChildForEventHandling(
+      aura::Window* child,
+      const gfx::Point& location) OVERRIDE {
+    return true;
+  }
+  virtual bool CanFocus() OVERRIDE { return true; }
+  virtual void OnCaptureLost() OVERRIDE {}
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
+    canvas->DrawColor(color_, SkXfermode::kSrc_Mode);
+  }
+  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
+  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {}
+  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
+  virtual bool HasHitTestMask() const OVERRIDE { return false; }
+  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
+
+ private:
+  SkColor color_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowDelegateImpl);
+};
+
+class WindowTreeClientImpl : public aura::client::WindowTreeClient {
+ public:
+  explicit WindowTreeClientImpl(aura::Window* window) : window_(window) {
+    aura::client::SetWindowTreeClient(window_, this);
+  }
+
+  virtual ~WindowTreeClientImpl() {
+    aura::client::SetWindowTreeClient(window_, NULL);
+  }
+
+  // Overridden from aura::client::WindowTreeClient:
+  virtual aura::Window* GetDefaultParent(aura::Window* context,
+                                         aura::Window* window,
+                                         const gfx::Rect& bounds) OVERRIDE {
+    if (!capture_client_) {
+      capture_client_.reset(
+          new aura::client::DefaultCaptureClient(window_->GetRootWindow()));
+    }
+    return window_;
+  }
+
+ private:
+  aura::Window* window_;
+
+  scoped_ptr<aura::client::DefaultCaptureClient> capture_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeClientImpl);
+};
+
+RootViewManager::RootViewManager(Shell* shell, RootNodeManager* root_node)
+    : shell_(shell),
+      root_node_manager_(root_node),
+      in_setup_(false) {
+  screen_.reset(ScreenMojo::Create());
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
+  InterfacePipe<NativeViewport, AnyInterface> pipe;
+  mojo::AllocationScope scope;
+  shell_->Connect("mojo:mojo_native_viewport_service",
+                  pipe.handle_to_peer.Pass());
+  window_tree_host_.reset(new WindowTreeHostMojo(
+        pipe.handle_to_self.Pass(),
+        gfx::Rect(800, 600),
+        base::Bind(&RootViewManager::OnCompositorCreated,
+                   base::Unretained(this))));
+}
+
+RootViewManager::~RootViewManager() {
+  window_tree_client_.reset();
+  window_tree_host_.reset();
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, NULL);
+}
+
+void RootViewManager::OnCompositorCreated() {
+  base::AutoReset<bool> resetter(&in_setup_, true);
+  window_tree_host_->InitHost();
+
+  aura::Window* root = root_node_manager_->root()->window();
+  window_tree_host_->window()->AddChild(root);
+  root->SetBounds(gfx::Rect(window_tree_host_->window()->bounds().size()));
+  root_node_manager_->root()->window()->Show();
+
+  window_tree_client_.reset(
+      new WindowTreeClientImpl(window_tree_host_->window()));
+
+  window_tree_host_->Show();
+}
+
+}  // namespace view_manager
+}  // namespace services
+}  // namespace mojo