mash: Add status area container to mash window manager

mash/wm/status_layout_manager.cc

Index: mash/wm/status_layout_manager.cc
diff --git a/mash/wm/shelf_layout.cc b/mash/wm/status_layout_manager.cc
similarity index 44%
rename from mash/wm/shelf_layout.cc
rename to mash/wm/status_layout_manager.cc
index a62dfea55d82632f135a87dfa85ec0097ffb0d1b..c6ee8cbd662d4a4bc38bf8871986df5f87bc2c7f 100644
--- a/mash/wm/shelf_layout.cc
+++ b/mash/wm/status_layout_manager.cc
@@ -2,11 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "mash/wm/shelf_layout.h"
+#include "mash/wm/status_layout_manager.h"
 
-#include "components/mus/public/cpp/property_type_converters.h"
 #include "components/mus/public/cpp/window.h"
-#include "components/mus/public/cpp/window_property.h"
 #include "mash/wm/property_util.h"
 #include "mash/wm/public/interfaces/ash_window_type.mojom.h"
 #include "ui/gfx/geometry/rect.h"
@@ -14,64 +12,42 @@
 namespace mash {
 namespace wm {
 
-namespace {
-
-mojom::AshWindowType GetAshWindowType(const mus::Window* window) {
-  if (!window->HasSharedProperty(mojom::kAshWindowType_Property))
-    return mojom::AshWindowType::COUNT;
-
-  return static_cast<mojom::AshWindowType>(
-      window->GetSharedProperty<int32_t>(mojom::kAshWindowType_Property));
-}
-
-}  // namespace
-
-ShelfLayout::ShelfLayout(mus::Window* owner)
+StatusLayoutManager::StatusLayoutManager(mus::Window* owner)
     : LayoutManager(owner),
       alignment_(mash::shelf::mojom::Alignment::BOTTOM),
       auto_hide_behavior_(mash::shelf::mojom::AutoHideBehavior::NEVER) {
   AddLayoutProperty(mus::mojom::WindowManager::kPreferredSize_Property);
 }
 
-ShelfLayout::~ShelfLayout() {}
+StatusLayoutManager::~StatusLayoutManager() {}
 
 // We explicitly don't make assertions about the number of children in this
 // layout as the number of children can vary when the application providing the
-// shelf restarts.
+// status area restarts.
 
-void ShelfLayout::LayoutWindow(mus::Window* window) {
-  const mojom::AshWindowType ash_window_type = GetAshWindowType(window);
+void StatusLayoutManager::LayoutWindow(mus::Window* window) {
+  if (GetAshWindowType(window) != mojom::AshWindowType::STATUS_AREA) {
+    // TODO(jamescook): Layout for notifications and other windows.
+    NOTIMPLEMENTED() << "Non-status-area window needs layout.";
+    return;
+  }
   gfx::Size size = GetWindowPreferredSize(window);
-
   if (alignment_ == mash::shelf::mojom::Alignment::BOTTOM) {
     const int y = owner()->bounds().height() - size.height();
-    if (ash_window_type == mojom::AshWindowType::SHELF) {
-      size.set_width(owner()->bounds().width());
-      window->SetBounds(gfx::Rect(0, y, size.width(), size.height()));
-    } else if (ash_window_type == mojom::AshWindowType::STATUS_AREA) {
-      // TODO(msw): Place the status area on the left for RTL UIs.
-      window->SetBounds(gfx::Rect(owner()->bounds().width() - size.width(), y,
-                                  size.width(), size.height()));
-    } else {
-      NOTREACHED() << "Unknown window in USER_SHELF container.";
-    }
+    // TODO(msw): Place the status area widget on the left for RTL UIs.
+    window->SetBounds(gfx::Rect(owner()->bounds().width() - size.width(), y,
+                                size.width(), size.height()));
   } else {
     const int x = (alignment_ == mash::shelf::mojom::Alignment::LEFT)
                       ? 0
                       : (owner()->bounds().width() - size.width());
-    if (ash_window_type == mojom::AshWindowType::SHELF) {
-      size.set_height(owner()->bounds().height());
-      window->SetBounds(gfx::Rect(x, 0, size.width(), size.height()));
-    } else if (ash_window_type == mojom::AshWindowType::STATUS_AREA) {
-      window->SetBounds(gfx::Rect(x, owner()->bounds().height() - size.height(),
-                                  size.width(), size.height()));
-    } else {
-      NOTREACHED() << "Unknown window in USER_SHELF container.";
-    }
+    window->SetBounds(gfx::Rect(x, owner()->bounds().height() - size.height(),
+                                size.width(), size.height()));
   }
 }
 
-void ShelfLayout::SetAlignment(mash::shelf::mojom::Alignment alignment) {
+void StatusLayoutManager::SetAlignment(
+    mash::shelf::mojom::Alignment alignment) {
   if (alignment_ == alignment)
     return;
 
@@ -80,7 +56,7 @@ void ShelfLayout::SetAlignment(mash::shelf::mojom::Alignment alignment) {
     LayoutWindow(window);
 }
 
-void ShelfLayout::SetAutoHideBehavior(
+void StatusLayoutManager::SetAutoHideBehavior(
     mash::shelf::mojom::AutoHideBehavior auto_hide) {
   if (auto_hide_behavior_ == auto_hide)
     return;