Add window manager component.

wm/foreign_window_client_view.cc

+// Copyright (c) 2013 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 "wm/foreign_window_client_view.h"
+
+#include "base/bind.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
+#include "ui/base/hit_test.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/widget/widget.h"
+#include "wm/gpu/foreign_window_texture_factory.h"
+
+namespace {
+
+class ContentsViewImpl : public views::View {
+ public:
+  ContentsViewImpl() {}
+  virtual ~ContentsViewImpl() {}
+
+  // Overridden from views::View:
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
+    canvas->FillRect(GetLocalBounds(), SK_ColorDKGRAY);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContentsViewImpl);
+};
+
+class WindowDelegateImpl : public aura::WindowDelegate {
+ public:
+  WindowDelegateImpl() {}
+  virtual ~WindowDelegateImpl() {}
+
+  // Overridden from aura::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 HTCLIENT;
+  }
+  virtual bool ShouldDescendIntoChildForEventHandling(
+      aura::Window* child,
+      const gfx::Point& location) OVERRIDE {
+    return false;
+  }
+  virtual bool CanFocus() OVERRIDE {
+    return true;
+  }
+  virtual void OnCaptureLost() OVERRIDE {}
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {}
+  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {
+  }
+  virtual void OnWindowDestroying() OVERRIDE {}
+  virtual void OnWindowDestroyed() OVERRIDE {
+    delete this;
+  }
+  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
+  virtual bool HasHitTestMask() const OVERRIDE {
+    return false;
+  }
+  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}
+  virtual scoped_refptr<ui::Texture> CopyTexture() OVERRIDE {
+    NOTIMPLEMENTED();
+    return scoped_refptr<ui::Texture>();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WindowDelegateImpl);
+};
+
+}  // namespace
+
+namespace wm {
+
+ForeignWindowClientView::ForeignWindowClientView(
+    gfx::PluginWindowHandle window_handle,
+    gfx::Size preferred_size)
+    : views::ClientView(NULL, NULL),
+      window_handle_(window_handle),
+      preferred_size_(preferred_size),
+      window_visible_(false),
+      window_destroyed_(false),
+      pending_texture_created_count_(0) {
+  ForeignWindowTextureFactory::GetInstance()->AddObserver(this);
+  contents_view_.reset(new ContentsViewImpl);
+  set_contents_view(contents_view_.get());
+  window_.reset(new aura::Window(new WindowDelegateImpl));
+  window_->set_owned_by_parent(false);
+  window_->SetType(aura::client::WINDOW_TYPE_CONTROL);
+  window_->SetTransparent(false);
+  window_->Init(ui::LAYER_TEXTURED);
+  window_->layer()->SetMasksToBounds(true);
+  window_->SetName("ForeignWindowClientView");
+}
+
+ForeignWindowClientView::~ForeignWindowClientView() {
+  ForeignWindowTextureFactory::GetInstance()->RemoveObserver(this);
+}
+
+gfx::Size ForeignWindowClientView::GetPreferredSize() {
+  return preferred_size_;
+}
+
+gfx::Size ForeignWindowClientView::GetMinimumSize() {
+  return gfx::Size(1, 1);
+}
+
+void ForeignWindowClientView::OnBoundsChanged(
+    const gfx::Rect& previous_bounds) {
+  window_->SetBounds(bounds());
+}
+
+void ForeignWindowClientView::OnLostResources() {
+  // ForeignWindowTextureFactory guarantees that it's safe to keep the
+  // existing |texture_| reference around until we have a new texture. By
+  // not resetting |texture_| here we verify this behavior. The compositor
+  // however doesn't like using this texture so we reset the external
+  // texture here to make sure that doesn't happen.
+  window_->SetExternalTexture(NULL);
+
+  if (window_visible_)
+    CreateTexture();
+}
+
+gfx::NativeView ForeignWindowClientView::GetNativeView() const {
+  return window_.get();
+}
+
+void ForeignWindowClientView::OnWindowContentsChanged() {
+  if (pending_texture_created_count_)
+    return;
+
+  if (texture_) {
+    texture_->OnContentsChanged();
+
+    GetNativeView()->SchedulePaintInRect(
+        gfx::Rect(GetNativeView()->bounds().size()));
+  } else {
+    CreateTexture();
+  }
+}
+
+void ForeignWindowClientView::OnWindowSizeChanged(const gfx::Size& size) {
+  if (window_size_ == size)
+    return;
+
+  window_size_ = size;
+
+  if (window_visible_)
+    CreateTexture();
+}
+
+void ForeignWindowClientView::OnWindowVisibilityChanged(bool visible) {
+  window_visible_ = visible;
+
+  // Drop |texture_| reference when invisible to make sure texture is
+  // destroyed when no longer used by the compositor. Don't reset external
+  // texture for |window_| as that would prevent the compositor from

[danakj, 2013/02/22 21:42:59]

Thanks this is very helpful.

+  // drawing using this texture.
+  if (!visible)
+    texture_ = NULL;
+}
+
+void ForeignWindowClientView::OnWindowDestroyed() {
+  window_destroyed_ = true;
+}
+
+void ForeignWindowClientView::CreateTexture() {
+  ++pending_texture_created_count_;
+
+  DCHECK(!window_destroyed_);
+  ForeignWindowTextureFactory* factory =
+      ForeignWindowTextureFactory::GetInstance();
+  factory->CreateTextureForForeignWindow(
+      window_handle_,
+      false,
+      1.0,
+      base::Bind(&ForeignWindowClientView::OnTextureCreated, AsWeakPtr()));
+}
+
+void ForeignWindowClientView::OnTextureCreated(
+    scoped_refptr<ForeignWindowTexture> texture) {
+  --pending_texture_created_count_;
+
+  if (!texture)
+    return;
+
+  texture_ = texture;
+  window_->SetExternalTexture(texture);
+}
+
+}  // namespace wm