aura-mus: Implement DesktopWindowTreeHostMus::StackAbove().

ui/aura/mus/window_tree_client.cc

 // Copyright 2014 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 "ui/aura/mus/window_tree_client.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 1492 matching lines @@
   }
 
   if (!window_manager_delegate_->IsWindowActive(window->GetWindow())) {
     DVLOG(1) << "Non-active window requested deactivation.";
     return;
   }
 
   window_manager_delegate_->OnWmDeactivateWindow(window->GetWindow());
 }
 
+void WindowTreeClient::WmStackAbove(uint32_t wm_change_id, Id above_id,
+                                    Id below_id) {
+  if (!window_manager_delegate_)
+    return;
+
+  WindowMus* below_mus = GetWindowByServerId(below_id);
+  if (!below_mus) {
+    DVLOG(1) << "Attempt to stack at top invalid window " << below_id;
+    if (window_manager_internal_client_)
+      window_manager_internal_client_->WmResponse(wm_change_id, false);
+    return;
+  }
+
+  WindowMus* above_mus = GetWindowByServerId(above_id);
+  if (!above_mus) {
+    DVLOG(1) << "Attempt to stack at top invalid window " << above_id;
+    if (window_manager_internal_client_)
+      window_manager_internal_client_->WmResponse(wm_change_id, false);
+    return;
+  }
+
+  Window* above = above_mus->GetWindow();
+  Window* below = below_mus->GetWindow();
+
+  if (above->parent() != below->parent()) {
+    DVLOG(1) << "Windows do not share the same parent";
+    if (window_manager_internal_client_)
+      window_manager_internal_client_->WmResponse(wm_change_id, false);
+    return;
+  }
+
+  above->parent()->StackChildAbove(above, below);
+
+  if (window_manager_internal_client_)
+    window_manager_internal_client_->WmResponse(wm_change_id, true);
+}
+
 void WindowTreeClient::WmStackAtTop(uint32_t wm_change_id, uint32_t window_id) {
   if (!window_manager_delegate_)
     return;
 
   WindowMus* window = GetWindowByServerId(window_id);
   if (!window) {
     DVLOG(1) << "Attempt to stack at top invalid window " << window_id;
     if (window_manager_internal_client_)
       window_manager_internal_client_->WmResponse(wm_change_id, false);
     return;
@@ skipping 125 matching lines @@
   tree_->SetHitTestMask(WindowMus::Get(window_tree_host->window())->server_id(),
                         out_rect);
 }
 
 void WindowTreeClient::OnWindowTreeHostDeactivateWindow(
     WindowTreeHostMus* window_tree_host) {
   tree_->DeactivateWindow(
       WindowMus::Get(window_tree_host->window())->server_id());
 }
 
+void WindowTreeClient::OnWindowTreeHostStackAbove(
+    WindowTreeHostMus* window_tree_host,
+    Window* window) {
+  WindowMus* above = WindowMus::Get(window_tree_host->window());
+  WindowMus* below = WindowMus::Get(window);
+  const uint32_t change_id = ScheduleInFlightChange(
+      base::MakeUnique<CrashInFlightChange>(above, ChangeType::REORDER));
+  tree_->StackAbove(change_id, above->server_id(), below->server_id());
+}
+
 void WindowTreeClient::OnWindowTreeHostStackAtTop(
     WindowTreeHostMus* window_tree_host) {
   WindowMus* window = WindowMus::Get(window_tree_host->window());
   const uint32_t change_id = ScheduleInFlightChange(
       base::MakeUnique<CrashInFlightChange>(window, ChangeType::REORDER));
   tree_->StackAtTop(change_id, window->server_id());
 }
 
 std::unique_ptr<WindowPortMus> WindowTreeClient::CreateWindowPortForTopLevel(
     const std::map<std::string, std::vector<uint8_t>>* properties) {
@@ skipping 102 matching lines @@
   return ScheduleInFlightChange(base::MakeUnique<InFlightCaptureChange>(
       this, capture_synchronizer_.get(), window));
 }
 
 uint32_t WindowTreeClient::CreateChangeIdForFocus(WindowMus* window) {
   return ScheduleInFlightChange(base::MakeUnique<InFlightFocusChange>(
       this, focus_synchronizer_.get(), window));
 }
 
 }  // namespace aura