aura: Add X11 host window management.

ash/hostwm/host_window_manager.cc

Index: ash/hostwm/host_window_manager.cc
diff --git a/ash/hostwm/host_window_manager.cc b/ash/hostwm/host_window_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..543ea07cb6b78ae9052614e514c346620af1be59
--- /dev/null
+++ b/ash/hostwm/host_window_manager.cc
@@ -0,0 +1,119 @@
+// 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 "ash/hostwm/host_window_manager.h"
+
+#include "ash/hostwm/host_window_container.h"
+#include "ash/shell.h"
+#include "ui/views/widget/widget.h"
+#include "ui/aura/window.h"
+#include "ui/gfx/screen.h"
+
+namespace {
+
+// TODO(reveman): This should not be a constant.
+const int kTitlebarHeight = 28;
+
+class HostWindowClientWidget : public views::Widget {
+public:
+  virtual bool OnKeyEvent(const views::KeyEvent& event) {
+    return false;
+  }
+};
+
+}
+
+namespace ash {
+namespace internal {
+
+gfx::NativeWindow HostWindowManager::OnHostWindowCreated(
+    const gfx::Rect& bounds, bool decorated) {
+  int top_offset = decorated ? kTitlebarHeight : 0;
+  HostWindowClientWidget* client_widget = new HostWindowClientWidget;
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params.delegate = NULL;
+  params.parent = NULL;
+  params.bounds = gfx::Rect(gfx::Point(0, top_offset), bounds.size());
+  params.can_activate = false;
+  client_widget->Init(params);
+  client_widget->GetNativeView()->SetName("HostWindowClient");
+  client_widget->Show();
+
+  gfx::Rect container_bounds(bounds.x(), bounds.y() - top_offset,
+                             bounds.width(), bounds.height() + top_offset);
+  HostWindowContainer::CreateHostWindowContainerWidget(client_widget,
+      container_bounds, decorated ? views::Widget::InitParams::TYPE_WINDOW :
+      views::Widget::InitParams::TYPE_MENU);
+
+  // Return the native client window.
+  return client_widget->GetNativeWindow();
+}
+
+void HostWindowManager::OnHostWindowDestroyed(
+    gfx::NativeWindow window) {
+  views::Widget* widget = views::Widget::GetWidgetForNativeWindow(
+      window->GetToplevelWindow());
+  if (!widget)
+    return;
+  widget->Close();
+}
+
+void HostWindowManager::OnHostWindowMovedOrResized(
+    gfx::NativeWindow window, const gfx::Rect& bounds) {
+  views::Widget* client_widget = views::Widget::GetWidgetForNativeWindow(
+      window);
+  if (!client_widget)
+    return;
+  client_widget->SetSize(bounds.size());
+  DCHECK(!client_widget->GetNativeView()->bounds().x());
+  DCHECK(!client_widget->GetNativeView()->bounds().y());
+  views::Widget* widget = views::Widget::GetWidgetForNativeWindow(
+      window->GetToplevelWindow());
+  if (!widget)
+    return;
+  widget->SetBounds(bounds);
+}
+
+void HostWindowManager::OnHostWindowMovedOrResizedConstrained(
+    gfx::NativeWindow window, const gfx::Rect& bounds) {
+  views::Widget* client_widget = views::Widget::GetWidgetForNativeWindow(
+      window);
+  if (!client_widget)
+    return;
+  DCHECK(!client_widget->GetNativeView()->bounds().x());
+  int top_offset = client_widget->GetNativeView()->bounds().y();
+  views::Widget* widget = views::Widget::GetWidgetForNativeWindow(
+      window->GetToplevelWindow());
+  if (!widget)
+    return;
+  gfx::Rect container_bounds(bounds.x(), bounds.y() - top_offset,
+                             bounds.width(), bounds.height() + top_offset);
+  // TODO(reveman): Use SetBoundsConstrained().
+  gfx::Rect work_area = gfx::Screen::GetDisplayNearestPoint(
+      bounds.origin()).work_area();
+  if (work_area.IsEmpty())
+    widget->SetBounds(container_bounds);
+  else
+    widget->SetBounds(container_bounds.AdjustToFit(work_area));
+}
+
+void HostWindowManager::OnHostWindowVisibilityChanged(
+    gfx::NativeWindow window, bool visible) {
+  views::Widget* widget = views::Widget::GetWidgetForNativeWindow(
+      window->GetToplevelWindow());
+  if (!widget)
+    return;
+  if (visible)
+    widget->Show();
+  else
+    widget->Hide();
+}
+
+aura::RootWindow* HostWindowManager::GetRootWindow() {
+  return ash::Shell::GetPrimaryRootWindow();
+}
+
+}  // namespace internal
+}  // namespace ash