mus: Let clients set the cursor of their window.

components/mus/ws/server_window.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 "components/mus/ws/server_window.h"
 
 #include <inttypes.h>
 
 #include "base/strings/stringprintf.h"
 #include "components/mus/common/transient_window_utils.h"
@@ skipping 11 matching lines @@
 
 ServerWindow::ServerWindow(ServerWindowDelegate* delegate,
                            const WindowId& id,
                            const Properties& properties)
     : delegate_(delegate),
       id_(id),
       parent_(nullptr),
       stacking_target_(nullptr),
       transient_parent_(nullptr),
       visible_(false),
+      cursor_id_(mojom::CURSOR_NULL),
       opacity_(1),
       can_focus_(true),
       properties_(properties),
       // Don't notify newly added observers during notification. This causes
       // problems for code that adds an observer as part of an observer
       // notification (such as ServerWindowDrawTracker).
       observers_(
           base::ObserverList<ServerWindowObserver>::NOTIFY_EXISTING_ONLY) {
   DCHECK(delegate);  // Must provide a delegate.
 }
@@ skipping 212 matching lines @@
                     OnWindowVisibilityChanged(this));
 }
 
 void ServerWindow::SetOpacity(float value) {
   if (value == opacity_)
     return;
   opacity_ = value;
   delegate_->OnScheduleWindowPaint(this);
 }
 
+void ServerWindow::SetPredefinedCursor(mus::mojom::Cursor value) {
+  if (value == cursor_id_)
+    return;
+  cursor_id_ = value;
+  FOR_EACH_OBSERVER(
+      ServerWindowObserver, observers_,
+      OnWindowPredefinedCursorChanged(this, static_cast<int32_t>(value)));
+}
+
 void ServerWindow::SetTransform(const gfx::Transform& transform) {
   if (transform_ == transform)
     return;
 
   transform_ = transform;
   delegate_->OnScheduleWindowPaint(this);
 }
 
 void ServerWindow::SetProperty(const std::string& name,
                                const std::vector<uint8_t>* value) {
@@ skipping 132 matching lines @@
 }
 
 // static
 ServerWindow** ServerWindow::GetStackingTarget(ServerWindow* window) {
   return &window->stacking_target_;
 }
 
 }  // namespace ws
 
 }  // namespace mus