Moves mash/wm into ash/mus

mash/wm/accelerator_registrar_impl.cc

-// Copyright 2015 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 "mash/wm/accelerator_registrar_impl.h"
-
-#include <stdint.h>
-#include <utility>
-
-#include "base/bind.h"
-#include "components/mus/public/cpp/window_manager_delegate.h"
-#include "mash/wm/root_window_controller.h"
-#include "mash/wm/window_manager.h"
-#include "mash/wm/window_manager_application.h"
-
-namespace mash {
-namespace wm {
-
-namespace {
-const int kAcceleratorIdMask = 0xffff;
-
-void OnAcceleratorAdded(bool result) {}
-void CallAddAcceleratorCallback(
-    const mus::mojom::AcceleratorRegistrar::AddAcceleratorCallback& callback,
-    bool result) {
-  callback.Run(result);
-}
-
-}  // namespace
-
-struct AcceleratorRegistrarImpl::Accelerator {
-  mus::mojom::EventMatcherPtr event_matcher;
-  AddAcceleratorCallback callback;
-  bool callback_used = false;
-};
-
-AcceleratorRegistrarImpl::AcceleratorRegistrarImpl(
-    WindowManagerApplication* wm_app,
-    uint32_t accelerator_namespace,
-    mojo::InterfaceRequest<AcceleratorRegistrar> request,
-    const DestroyCallback& destroy_callback)
-    : wm_app_(wm_app),
-      binding_(this, std::move(request)),
-      accelerator_namespace_(accelerator_namespace & 0xffff),
-      destroy_callback_(destroy_callback) {
-  wm_app_->AddRootWindowsObserver(this);
-  binding_.set_connection_error_handler(base::Bind(
-      &AcceleratorRegistrarImpl::OnBindingGone, base::Unretained(this)));
-}
-
-void AcceleratorRegistrarImpl::Destroy() {
-  delete this;
-}
-
-bool AcceleratorRegistrarImpl::OwnsAccelerator(uint32_t accelerator_id) const {
-  return !!accelerators_.count(accelerator_id);
-}
-
-void AcceleratorRegistrarImpl::ProcessAccelerator(uint32_t accelerator_id,
-                                                  mus::mojom::EventPtr event) {
-  DCHECK(OwnsAccelerator(accelerator_id));
-  accelerator_handler_->OnAccelerator(accelerator_id & kAcceleratorIdMask,
-                                      std::move(event));
-}
-
-AcceleratorRegistrarImpl::~AcceleratorRegistrarImpl() {
-  wm_app_->RemoveRootWindowsObserver(this);
-  RemoveAllAccelerators();
-  destroy_callback_.Run(this);
-}
-
-uint32_t AcceleratorRegistrarImpl::ComputeAcceleratorId(
-    uint32_t accelerator_id) const {
-  return (accelerator_namespace_ << 16) | (accelerator_id & kAcceleratorIdMask);
-}
-
-void AcceleratorRegistrarImpl::OnBindingGone() {
-  binding_.Unbind();
-  // If there's no outstanding accelerators for this connection, then destroy
-  // it.
-  if (accelerators_.empty())
-    delete this;
-}
-
-void AcceleratorRegistrarImpl::OnHandlerGone() {
-  // The handler is dead. If AcceleratorRegistrar connection is also closed,
-  // then destroy this. Otherwise, remove all the accelerators, but keep the
-  // AcceleratorRegistrar connection alive (the client could still set another
-  // handler and install new accelerators).
-  if (!binding_.is_bound()) {
-    delete this;
-    return;
-  }
-  accelerator_handler_.reset();
-  RemoveAllAccelerators();
-}
-
-void AcceleratorRegistrarImpl::AddAcceleratorToRoot(
-    RootWindowController* root,
-    uint32_t namespaced_accelerator_id) {
-  Accelerator& accelerator = accelerators_[namespaced_accelerator_id];
-  AddAcceleratorCallback callback = accelerator.callback_used
-                                        ? base::Bind(&OnAcceleratorAdded)
-                                        : accelerator.callback;
-  // Ensure we only notify the callback once (as happens with mojoms).
-  accelerator.callback_used = true;
-  root->window_manager()->window_manager_client()->AddAccelerator(
-      namespaced_accelerator_id, accelerator.event_matcher.Clone(),
-      base::Bind(&CallAddAcceleratorCallback, callback));
-}
-
-void AcceleratorRegistrarImpl::RemoveAllAccelerators() {
-  for (const auto& pair : accelerators_) {
-    for (RootWindowController* root : wm_app_->GetRootControllers()) {
-      root->window_manager()->window_manager_client()->RemoveAccelerator(
-          pair.first);
-    }
-  }
-  accelerators_.clear();
-}
-
-void AcceleratorRegistrarImpl::SetHandler(
-    mus::mojom::AcceleratorHandlerPtr handler) {
-  accelerator_handler_ = std::move(handler);
-  accelerator_handler_.set_connection_error_handler(base::Bind(
-      &AcceleratorRegistrarImpl::OnHandlerGone, base::Unretained(this)));
-}
-
-void AcceleratorRegistrarImpl::AddAccelerator(
-    uint32_t accelerator_id,
-    mus::mojom::EventMatcherPtr matcher,
-    const AddAcceleratorCallback& callback) {
-  if (!accelerator_handler_ ||
-      (accelerator_id & kAcceleratorIdMask) != accelerator_id) {
-    // The |accelerator_id| is too large, and it can't be handled correctly.
-    callback.Run(false);
-    return;
-  }
-  uint32_t namespaced_accelerator_id = ComputeAcceleratorId(accelerator_id);
-  accelerators_[namespaced_accelerator_id].event_matcher = matcher->Clone();
-  accelerators_[namespaced_accelerator_id].callback = callback;
-  accelerators_[namespaced_accelerator_id].callback_used = false;
-  for (RootWindowController* root : wm_app_->GetRootControllers())
-    AddAcceleratorToRoot(root, namespaced_accelerator_id);
-}
-
-void AcceleratorRegistrarImpl::RemoveAccelerator(uint32_t accelerator_id) {
-  uint32_t namespaced_accelerator_id = ComputeAcceleratorId(accelerator_id);
-  auto iter = accelerators_.find(namespaced_accelerator_id);
-  if (iter == accelerators_.end())
-    return;
-  for (RootWindowController* root : wm_app_->GetRootControllers()) {
-    root->window_manager()->window_manager_client()->RemoveAccelerator(
-        namespaced_accelerator_id);
-  }
-  accelerators_.erase(iter);
-  // If the registrar is not bound anymore (i.e. the client can no longer
-  // install new accelerators), and the last accelerator has been removed, then
-  // there's no point keeping this alive anymore.
-  if (accelerators_.empty() && !binding_.is_bound())
-    delete this;
-}
-
-void AcceleratorRegistrarImpl::OnRootWindowControllerAdded(
-    RootWindowController* controller) {
-  for (const auto& pair : accelerators_)
-    AddAcceleratorToRoot(controller, pair.first);
-}
-
-}  // namespace wm
-}  // namespace mash