Add the interfaces for the window management component.

This CL adds 2 interfaces for the window management component to save
the window information, and get the saved window info based on:
go/chrome-os-full-restore-interfaces

There will be separate CLs to implement these 2 interfaces.

BUG=1146900

Change-Id: Id2885863f4e9a1725382793064e10ac7597cfb1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2586648
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836889}

components/full_restore/BUILD.gn

@@ -17,6 +17,8 @@ component("full_restore") {
     "full_restore_utils.h",
     "restore_data.cc",
     "restore_data.h",
+    "window_info.cc",
+    "window_info.h",
   ]
 
   defines = [ "IS_FULL_RESTORE_IMPL" ]
@@ -25,6 +27,7 @@ component("full_restore") {
     "//ash/public/cpp",
     "//base",
     "//components/services/app_service/public/mojom",
+    "//ui/aura",
   ]
 }
 

components/full_restore/full_restore_utils.cc

@@ -8,6 +8,7 @@
 #include "base/files/file_path.h"
 #include "components/full_restore/app_launch_info.h"
 #include "components/full_restore/full_restore_save_handler.h"
+#include "components/full_restore/window_info.h"
 
 namespace {
 
@@ -28,6 +29,25 @@ void SaveAppLaunchInfo(const base::FilePath& profile_dir,
       profile_dir, std::move(app_launch_info));
 }
 
+void SaveWindowInfo(std::unique_ptr<WindowInfo> window_info) {
+  if (!ash::features::IsFullRestoreEnabled())
+    return;
+
+  // TODO(crbug.com/1146900): Save the window information to the full restore
+  // file.
+}
+
+std::unique_ptr<WindowInfo> GetWindowInfo(aura::Window* window) {
+  if (!ash::features::IsFullRestoreEnabled())
+    return nullptr;
+
+  auto window_info = std::make_unique<WindowInfo>();
+
+  // TODO(crbug.com/1146900): Get the window information from the full restore
+  // file.
+  return window_info;
+}
+
 bool ShouldRestore() {
   return g_restore;
 }

components/full_restore/full_restore_utils.h

@@ -9,6 +9,10 @@
 
 #include "base/component_export.h"
 
+namespace aura {
+class Window;
+}
+
 namespace base {
 class FilePath;
 }
@@ -16,12 +20,21 @@ class FilePath;
 namespace full_restore {
 
 struct AppLaunchInfo;
+struct WindowInfo;
 
 // Saves the app launch parameters to the full restore file.
 COMPONENT_EXPORT(FULL_RESTORE)
 void SaveAppLaunchInfo(const base::FilePath& profile_dir,
                        std::unique_ptr<AppLaunchInfo> app_launch_info);
 
+// Saves the window information to the full restore file.
+COMPONENT_EXPORT(FULL_RESTORE)
+void SaveWindowInfo(std::unique_ptr<WindowInfo> window_info);
+
+// Gets the window information from the full restore file.
+COMPONENT_EXPORT(FULL_RESTORE)
+std::unique_ptr<WindowInfo> GetWindowInfo(aura::Window* window);
+
 // Returns true if we should restore apps and pages based on the restore setting
 // and the user's choice from the notification. Otherwise, returns false.
 COMPONENT_EXPORT(FULL_RESTORE) bool ShouldRestore();

components/full_restore/window_info.cc

+// Copyright 2020 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 "components/full_restore/window_info.h"
+
+namespace full_restore {
+
+WindowInfo::WindowInfo() = default;
+WindowInfo::~WindowInfo() = default;
+
+}  // namespace full_restore

components/full_restore/window_info.h

+// Copyright 2020 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.
+
+#ifndef COMPONENTS_FULL_RESTORE_WINDOW_INFO_H_
+#define COMPONENTS_FULL_RESTORE_WINDOW_INFO_H_
+
+#include "base/optional.h"
+#include "ui/aura/window.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace full_restore {
+
+// This struct is the parameter for the interface SaveWindowInfo, to save the
+// window information.
+struct COMPONENT_EXPORT(FULL_RESTORE) WindowInfo {
+ public:
+  WindowInfo();
+  WindowInfo(const WindowInfo&) = delete;
+  WindowInfo& operator=(const WindowInfo&) = delete;
+  ~WindowInfo();
+
+  aura::Window* window;
+
+  // Index in MruWindowTracker to restore window stack.
+  base::Optional<int32_t> activation_index;
+
+  // Virtual desk id.
+  base::Optional<int32_t> desk_id;
+
+  // The restored bounds in screen coordinates. Empty if the window is not
+  // snapped/maximized/minimized.
+  base::Optional<gfx::Rect> restore_bounds;
+
+  // Current bounds in screen in coordinates.
+  base::Optional<gfx::Rect> current_bounds;
+
+  // Window state, minimized, maximized, inactive, etc.
+  base::Optional<int32_t> window_state_type;
+};
+
+}  // namespace full_restore
+
+#endif  // COMPONENTS_FULL_RESTORE_WINDOW_INFO_H_