content/renderer/dom_storage/webstoragearea_impl.cc

   1 // Copyright (c) 2012 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 "content/renderer/dom_storage/webstoragearea_impl.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "base/time/time.h"
  11 #include "content/common/dom_storage/dom_storage_messages.h"
  12 #include "content/renderer/dom_storage/dom_storage_cached_area.h"
  13 #include "content/renderer/dom_storage/dom_storage_dispatcher.h"
  14 #include "content/renderer/render_thread_impl.h"
  15 #include "third_party/WebKit/public/platform/WebURL.h"
  16
  17 using blink::WebString;
  18 using blink::WebURL;
  19
  20 namespace content {
  21
  22 namespace {
  23 typedef IDMap<WebStorageAreaImpl> AreaImplMap;
  24 base::LazyInstance<AreaImplMap>::Leaky
  25     g_all_areas_map = LAZY_INSTANCE_INITIALIZER;
  26
  27 DomStorageDispatcher* dispatcher() {
  28   return RenderThreadImpl::current()->dom_storage_dispatcher();
  29 }
  30 }  // namespace
  31
  32 // static
  33 WebStorageAreaImpl* WebStorageAreaImpl::FromConnectionId(int id) {
  34   return g_all_areas_map.Pointer()->Lookup(id);
  35 }
  36
  37 WebStorageAreaImpl::WebStorageAreaImpl(
  38     int64 namespace_id, const GURL& origin)
  39     : connection_id_(g_all_areas_map.Pointer()->Add(this)),
  40       cached_area_(dispatcher()->
  41           OpenCachedArea(connection_id_, namespace_id, origin)) {
  42 }
  43
  44 WebStorageAreaImpl::~WebStorageAreaImpl() {
  45   g_all_areas_map.Pointer()->Remove(connection_id_);
  46   if (dispatcher())
  47     dispatcher()->CloseCachedArea(connection_id_, cached_area_.get());
  48 }
  49
  50 unsigned WebStorageAreaImpl::length() {
  51   return cached_area_->GetLength(connection_id_);
  52 }
  53
  54 WebString WebStorageAreaImpl::key(unsigned index) {
  55   return cached_area_->GetKey(connection_id_, index);
  56 }
  57
  58 WebString WebStorageAreaImpl::getItem(const WebString& key) {
  59   return cached_area_->GetItem(connection_id_, key);
  60 }
  61
  62 void WebStorageAreaImpl::setItem(
  63     const WebString& key, const WebString& value, const WebURL& page_url,
  64     WebStorageArea::Result& result) {
  65   if (!cached_area_->SetItem(connection_id_, key, value, page_url))
  66     result = ResultBlockedByQuota;
  67   else
  68     result = ResultOK;
  69 }
  70
  71 void WebStorageAreaImpl::removeItem(
  72     const WebString& key, const WebURL& page_url) {
  73   cached_area_->RemoveItem(connection_id_, key, page_url);
  74 }
  75
  76 void WebStorageAreaImpl::clear(const WebURL& page_url) {
  77   cached_area_->Clear(connection_id_, page_url);
  78 }
  79
  80 size_t WebStorageAreaImpl::memoryBytesUsedByCache() const {
  81   return cached_area_->MemoryBytesUsedByCache();
  82 }
  83
  84 }  // namespace content