mus: Implement Window Server Capture

components/mus/view_tree_apptest.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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "components/mus/ids.h"
 #include "components/mus/public/interfaces/view_tree.mojom.h"
@@ skipping 144 matching lines @@
 }
 
 bool DeleteView(ViewTree* vm, Id view_id) {
   base::RunLoop run_loop;
   bool result = false;
   vm->DeleteView(view_id, base::Bind(&BoolResultCallback, &run_loop, &result));
   run_loop.Run();
   return result;
 }
 
+bool SetViewCapture(ViewTree* vm, Id view_id) {
+  base::RunLoop run_loop;
+  bool result = false;
+  vm->SetCapture(view_id, base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
 bool SetViewBounds(ViewTree* vm, Id view_id, int x, int y, int w, int h) {
   base::RunLoop run_loop;
   bool result = false;
   RectPtr rect(mojo::Rect::New());
   rect->x = x;
   rect->y = y;
   rect->width = w;
   rect->height = h;
   vm->SetViewBounds(view_id, rect.Pass(),
                     base::Bind(&BoolResultCallback, &run_loop, &result));
@@ skipping 134 matching lines @@
     tree_ = tree.Pass();
     connection_id_ = connection_id;
     tracker()->OnEmbed(connection_id, root.Pass());
     if (embed_run_loop_)
       embed_run_loop_->Quit();
   }
   void OnEmbeddedAppDisconnected(Id view_id) override {
     tracker()->OnEmbeddedAppDisconnected(view_id);
   }
   void OnUnembed() override { tracker()->OnUnembed(); }
+  void OnLostCapture(Id view_id) override { tracker()->OnLostCapture(view_id); }
   void OnViewBoundsChanged(Id view_id,
                            RectPtr old_bounds,
                            RectPtr new_bounds) override {
     // The bounds of the root may change during startup on Android at random
     // times. As this doesn't matter, and shouldn't impact test exepctations,
     // it is ignored.
     if (view_id == root_view_id_)
       return;
     tracker()->OnViewBoundsChanged(view_id, old_bounds.Pass(),
                                    new_bounds.Pass());
@@ skipping 1331 matching lines @@
       vm1(), view_1_2, mojo::ViewTree::ACCESS_POLICY_EMBED_ROOT, nullptr);
   ASSERT_TRUE(vm_client3_.get() != nullptr);
   vm_client3_->set_root_view(root_view_id());
 
   // view_1_2 is vm3's root, so even though v3 is an embed root it should not
   // be able to Embed into itself.
   ASSERT_FALSE(
       EmbedUrl(application_impl(), vm3(), application_impl()->url(), view_1_2));
 }
 
+TEST_F(ViewTreeAppTest, CapturePropagation) {
+  Id view_1_1 = vm_client1()->CreateView(1);
+  Id view_1_2 = vm_client1()->CreateView(2);
+  changes1()->clear();
+  // View 1 takes capture then View 2 takes capture.
+  // Verify that view 1 has lost capture.
+  SetViewCapture(vm1(), view_1_1);
+  SetViewCapture(vm1(), view_1_2);

[sadrul, 2015/09/18 01:30:50]

What if the two setcapture calls come from two separate clients?

[Fady Samuel, 2015/09/18 02:44:43]

So two separate windows? If one tries to capture, the OS will release capture
for the other, right? I'm not sure how to test that.

[sadrul, 2015/09/18 11:47:28]

Yep. (in most cases anyway. The second capture can be declined in some cases)

I meant for the case where an embedder and an oopif both do SetCapture (i.e.
different tree-clients within the same host) one after the other.

+  vm_client1_->WaitForChangeCount(1);
+
+  EXPECT_EQ("OnLostCapture view=" + IdToString(view_1_1),
+            SingleChangeToDescription(*changes1()));
+  // std::vector<TestView> views;
+  // GetViewTree(vm1(), view_1_1, &views);
+  // EXPECT_FALSE(views.empty());
+}

[sadrul, 2015/09/18 01:30:50]

?

[Fady Samuel, 2015/09/18 02:44:43]

Removed.

 // TODO(sky): need to better track changes to initial connection. For example,
 // that SetBounsdViews/AddView and the like don't result in messages to the
 // originating connection.
 
 // TODO(sky): make sure coverage of what was
 // ViewManagerTest.SecondEmbedRoot_InitService and
 // ViewManagerTest.MultipleEmbedRootsBeforeWTHReady gets added to window manager
 // tests.
 
 }  // namespace mus