Add window manager component.

wm/foreign_window.cc

+// Copyright (c) 2012 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.h"
+
+#include "ui/aura/window.h"
+#include "ui/aura/window_property.h"
+#include "ui/views/widget/widget.h"
+#include "wm/foreign_window_client_view.h"
+#include "wm/host/foreign_window_host.h"
+
+namespace wm {
+
+namespace {
+
+DECLARE_WINDOW_PROPERTY_TYPE(ForeignWindow*)
+DEFINE_LOCAL_WINDOW_PROPERTY_KEY(ForeignWindow*, kForeignWindowKey, NULL);
+
+ForeignWindowHost* CreateHost(ForeignWindow* foreign_window,
+                              gfx::PluginWindowHandle window_handle) {
+  ForeignWindowHost* host = ForeignWindowHost::Create(window_handle);
+  host->SetDelegate(foreign_window);
+  return host;
+}
+
+}  // namespace
+
+ForeignWindow::CreateParams::CreateParams(
+    gfx::PluginWindowHandle a_window_handle,
+    const gfx::Size& a_preferred_size)

[danakj, 2013/02/21 01:33:15]

by value

+    : window_handle(a_window_handle),
+      preferred_size(a_preferred_size) {
+}
+
+ForeignWindow::ForeignWindow(const CreateParams& params)
+    : ALLOW_THIS_IN_INITIALIZER_LIST(
+        host_(CreateHost(this, params.window_handle))),
+      preferred_size_(params.preferred_size),
+      display_state_(DISPLAY_WITHDRAWN),
+      destroyed_(false) {
+}
+
+ForeignWindow::~ForeignWindow() {
+  if (!client_view_)
+    return;
+
+  client_view_->GetNativeView()->ClearProperty(kForeignWindowKey);
+}
+
+void ForeignWindow::OnWindowContentsChanged() {
+  if (!client_view_)
+    return;
+
+  client_view_->OnWindowContentsChanged();
+}
+
+ForeignWindow* ForeignWindow::AsForeignWindow() {
+  return this;
+}
+
+views::WidgetDelegate* ForeignWindow::CreateWidgetDelegate() {
+  AddRef();  // Balanced in DeleteDelegate();

[danakj, 2013/02/21 01:33:15]

T_T

+  return this;
+}
+
+views::ClientView* ForeignWindow::CreateClientView(views::Widget* widget) {

[danakj, 2013/02/21 01:33:15]

can you give |widget| a more descriptive name? is it just the parent_widget? or
is its purpose/meaning something else?

[reveman, 2013/02/22 01:26:44]

This is the implementation of WidgetDelegate. |widget| is the widget represeting
the foreign window. I prefer to have the name of this argument match the
WidgetDelegate declaration.  

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

I see, okay. I saw the AddChild() and was unsure what the relationship here was.

+  DCHECK(!client_view_);
+  ForeignWindowClientView* client_view = new ForeignWindowClientView(
+      host_->GetWindowHandle(), preferred_size_);
+  client_view->GetNativeView()->SetProperty(kForeignWindowKey, this);
+  client_view->GetNativeView()->Show();
+  widget->GetNativeView()->AddChild(client_view->GetNativeView());
+
+  // Keep a weak reference to the client view.
+  client_view_ = client_view->AsWeakPtr();
+
+  return client_view;
+}
+
+views::Widget* ForeignWindow::GetWidget() {
+  if (!client_view_)
+    return NULL;
+
+  return client_view_->GetWidget();
+}
+
+const views::Widget* ForeignWindow::GetWidget() const {
+  if (!client_view_)
+    return NULL;
+
+  return client_view_->GetWidget();
+}
+
+void ForeignWindow::DeleteDelegate() {
+  // The window has finished closing. Allow ourself to be deleted.
+  Release();
+}
+
+bool ForeignWindow::CanResize() const {
+  return false;
+}
+
+bool ForeignWindow::CanMaximize() const {
+  return false;
+}
+
+bool ForeignWindow::CanActivate() const {
+  return true;
+}
+
+void ForeignWindow::Close() {
+  host_->Close();
+}
+
+gfx::PluginWindowHandle ForeignWindow::GetWindowHandle() const {
+  return host_->GetWindowHandle();
+}
+
+void ForeignWindow::SetWindowSize(const gfx::Size& size) {
+  if (!client_view_)
+    return;
+
+  client_view_->SetWindowSize(size);
+}
+
+void ForeignWindow::SetWindowVisible(bool visible) {
+  if (!client_view_)
+    return;
+
+  client_view_->SetWindowVisible(visible);
+}
+
+void ForeignWindow::OnWindowDestroyed() {
+  DCHECK(!destroyed_);
+  destroyed_ = true;
+
+  if (!client_view_)
+    return;
+
+  client_view_->OnWindowDestroyed();
+}
+
+gfx::NativeView ForeignWindow::GetNativeView() const {
+  if (!client_view_)
+    return NULL;
+
+  return client_view_->GetNativeView();
+}
+
+void ForeignWindow::SetDisplayState(ForeignWindow::DisplayState state) {
+  display_state_ = state;
+}
+
+ForeignWindow::DisplayState ForeignWindow::GetDisplayState() const {
+  return display_state_;
+}
+
+bool ForeignWindow::IsManaged() const {
+  return true;
+}
+
+bool ForeignWindow::HasBeenDestroyed() const {
+  return destroyed_;
+}
+
+// static
+ForeignWindow* ForeignWindow::GetForeignWindowForNativeView(
+    gfx::NativeView native_view) {
+  return native_view->GetProperty(kForeignWindowKey);
+}
+
+}  // namespace wm