extensions/browser/mojo/stash_backend.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/browser/mojo/stash_backend.h"
   6
   7 namespace extensions {
   8
   9 // An implementation of StashService that forwards calls to a StashBackend.
  10 class StashServiceImpl : public mojo::InterfaceImpl<StashService> {
  11  public:
  12   explicit StashServiceImpl(base::WeakPtr<StashBackend> backend);
  13   ~StashServiceImpl() override;
  14
  15   // mojo::InterfaceImpl<StashService> overrides.
  16   void AddToStash(mojo::Array<StashedObjectPtr> stash) override;
  17   void RetrieveStash(
  18       const mojo::Callback<void(mojo::Array<StashedObjectPtr> stash)>& callback)
  19       override;
  20
  21  private:
  22   base::WeakPtr<StashBackend> backend_;
  23
  24   DISALLOW_COPY_AND_ASSIGN(StashServiceImpl);
  25 };
  26
  27 StashBackend::StashBackend() : weak_factory_(this) {
  28 }
  29
  30 StashBackend::~StashBackend() {
  31 }
  32
  33 void StashBackend::AddToStash(mojo::Array<StashedObjectPtr> stashed_objects) {
  34   for (size_t i = 0; i < stashed_objects.size(); i++) {
  35     stashed_objects_.push_back(stashed_objects[i].Pass());
  36   }
  37 }
  38
  39 mojo::Array<StashedObjectPtr> StashBackend::RetrieveStash() {
  40   if (stashed_objects_.is_null())
  41     stashed_objects_.resize(0);
  42   return stashed_objects_.Pass();
  43 }
  44
  45 void StashBackend::BindToRequest(mojo::InterfaceRequest<StashService> request) {
  46   mojo::BindToRequest(new StashServiceImpl(weak_factory_.GetWeakPtr()),
  47                       &request);
  48 }
  49
  50 StashServiceImpl::StashServiceImpl(base::WeakPtr<StashBackend> backend)
  51     : backend_(backend) {
  52 }
  53
  54 StashServiceImpl::~StashServiceImpl() {
  55 }
  56
  57 void StashServiceImpl::AddToStash(
  58     mojo::Array<StashedObjectPtr> stashed_objects) {
  59   if (!backend_)
  60     return;
  61   backend_->AddToStash(stashed_objects.Pass());
  62 }
  63
  64 void StashServiceImpl::RetrieveStash(
  65     const mojo::Callback<void(mojo::Array<StashedObjectPtr>)>& callback) {
  66   if (!backend_) {
  67     callback.Run(mojo::Array<StashedObjectPtr>(0));
  68     return;
  69   }
  70   callback.Run(backend_->RetrieveStash());
  71 }
  72
  73 }  // namespace extensions