Mus Window Server Post Target Accelerators

Implement post-target accelerators in the mus window server.

EventDispatcher's EventMatcher class has been refactored out into Accelerator. This provides a WeakPtr, as accelerators can be deleted by the client while the window server is awaiting an event ack. We don't want to notify a now deleted accelerator.

Updated EventDispatcher to send post-targer accelerators to its delegate.
Updated WindowManagerState to track accelerators awaiting event acks. On unhandled event acks the accelerator is sent.

TEST=EventDispatcherTest, WindowManagerStateTest, manual testing of a post-target accelerator
BUG=560478

Review URL: https://codereview.chromium.org/1806413003

Cr-Commit-Position: refs/heads/master@{#382600}

1 files changed, 24 insertions, 0 deletions

diff --git a/components/mus/ws/test_utils.cc b/components/mus/ws/test_utils.cc
index 87b517c..4201f94 100644
--- a/components/mus/ws/test_utils.cc
+++ b/components/mus/ws/test_utils.cc
@@ -7,8 +7,10 @@
 #include "cc/output/copy_output_request.h"
 #include "components/mus/surfaces/surfaces_state.h"
 #include "components/mus/ws/display_binding.h"
+#include "components/mus/ws/window_manager_access_policy.h"
 #include "components/mus/ws/window_manager_factory_service.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/shell/public/interfaces/connector.mojom.h"
 
 namespace mus {
 namespace ws {
@@ -112,6 +114,28 @@ int EventDispatcherTestApi::NumberPointerTargetsForWindow(
   return count;
 }
 
+// TestDisplayBinding ---------------------------------------------------------
+
+WindowTree* TestDisplayBinding::CreateWindowTree(ServerWindow* root) {
+  return window_server_->EmbedAtWindow(
+      root, mojo::shell::mojom::kRootUserID, mus::mojom::WindowTreeClientPtr(),
+      make_scoped_ptr(new WindowManagerAccessPolicy));
+}
+
+// TestWindowManager ----------------------------------------------------------
+
+void TestWindowManager::WmCreateTopLevelWindow(
+    uint32_t change_id,
+    mojo::Map<mojo::String, mojo::Array<uint8_t>> properties) {
+  got_create_top_level_window_ = true;
+  change_id_ = change_id;
+}
+
+void TestWindowManager::OnAccelerator(uint32_t id, mojom::EventPtr event) {
+  on_accelerator_called_ = true;
+  on_accelerator_id_ = id;
+}
+
 // TestWindowTreeClient -------------------------------------------------------
 
 TestWindowTreeClient::TestWindowTreeClient()