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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "webkit/renderer/dom_storage/dom_storage_cached_area.h" | 5 #include "webkit/renderer/dom_storage/dom_storage_cached_area.h" |
| 6 | 6 |
| 7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
| 8 #include "base/time.h" | 8 #include "base/time.h" |
| 9 #include "base/metrics/histogram.h" | 9 #include "base/metrics/histogram.h" |
| 10 #include "webkit/common/dom_storage/dom_storage_map.h" | 10 #include "webkit/common/dom_storage/dom_storage_map.h" |
| 11 #include "webkit/renderer/dom_storage/dom_storage_proxy.h" | 11 #include "webkit/renderer/dom_storage/dom_storage_proxy.h" |
| 12 | 12 |
| 13 namespace dom_storage { | 13 namespace dom_storage { |
| 14 | 14 |
| 15 DomStorageCachedArea::DomStorageCachedArea( | 15 DomStorageCachedArea::DomStorageCachedArea( |
| 16 int64 namespace_id, const GURL& origin, DomStorageProxy* proxy) | 16 int64 namespace_id, const GURL& origin, DomStorageProxy* proxy) |
| 17 : ignore_all_mutations_(false), | 17 : ignore_all_mutations_(false), |
| 18 namespace_id_(namespace_id), origin_(origin), | 18 namespace_id_(namespace_id), origin_(origin), |
| 19 proxy_(proxy), weak_factory_(this) { | 19 proxy_(proxy), weak_factory_(this) { |
| 20 } | 20 } |
| 21 | 21 |
| 22 DomStorageCachedArea::~DomStorageCachedArea() { | 22 DomStorageCachedArea::~DomStorageCachedArea() { |
| 23 } | 23 } |
| 24 | 24 |
| 25 unsigned DomStorageCachedArea::GetLength(int connection_id) { | 25 unsigned DomStorageCachedArea::GetLength(int connection_id) { |
| 26 PrimeIfNeeded(connection_id); | 26 PrimeIfNeeded(connection_id); |
| 27 return map_->Length(); | 27 return map_->Length(); |
| 28 } | 28 } |
| 29 | 29 |
| 30 NullableString16 DomStorageCachedArea::GetKey( | 30 base::NullableString16 DomStorageCachedArea::GetKey( |
| 31 int connection_id, unsigned index) { | 31 int connection_id, unsigned index) { |
| 32 PrimeIfNeeded(connection_id); | 32 PrimeIfNeeded(connection_id); |
| 33 return map_->Key(index); | 33 return map_->Key(index); |
| 34 } | 34 } |
| 35 | 35 |
| 36 NullableString16 DomStorageCachedArea::GetItem( | 36 base::NullableString16 DomStorageCachedArea::GetItem( |
| 37 int connection_id, const base::string16& key) { | 37 int connection_id, const base::string16& key) { |
| 38 PrimeIfNeeded(connection_id); | 38 PrimeIfNeeded(connection_id); |
| 39 return map_->GetItem(key); | 39 return map_->GetItem(key); |
| 40 } | 40 } |
| 41 | 41 |
| 42 bool DomStorageCachedArea::SetItem( | 42 bool DomStorageCachedArea::SetItem( |
| 43 int connection_id, const base::string16& key, | 43 int connection_id, const base::string16& key, |
| 44 const base::string16& value, const GURL& page_url) { | 44 const base::string16& value, const GURL& page_url) { |
| 45 // A quick check to reject obviously overbudget items to avoid | 45 // A quick check to reject obviously overbudget items to avoid |
| 46 // the priming the cache. | 46 // the priming the cache. |
| 47 if (key.length() + value.length() > dom_storage::kPerAreaQuota) | 47 if (key.length() + value.length() > dom_storage::kPerAreaQuota) |
| 48 return false; | 48 return false; |
| 49 | 49 |
| 50 PrimeIfNeeded(connection_id); | 50 PrimeIfNeeded(connection_id); |
| 51 NullableString16 unused; | 51 base::NullableString16 unused; |
| 52 if (!map_->SetItem(key, value, &unused)) | 52 if (!map_->SetItem(key, value, &unused)) |
| 53 return false; | 53 return false; |
| 54 | 54 |
| 55 // Ignore mutations to 'key' until OnSetItemComplete. | 55 // Ignore mutations to 'key' until OnSetItemComplete. |
| 56 ignore_key_mutations_[key]++; | 56 ignore_key_mutations_[key]++; |
| 57 proxy_->SetItem( | 57 proxy_->SetItem( |
| 58 connection_id, key, value, page_url, | 58 connection_id, key, value, page_url, |
| 59 base::Bind(&DomStorageCachedArea::OnSetItemComplete, | 59 base::Bind(&DomStorageCachedArea::OnSetItemComplete, |
| 60 weak_factory_.GetWeakPtr(), key)); | 60 weak_factory_.GetWeakPtr(), key)); |
| 61 return true; | 61 return true; |
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| 83 | 83 |
| 84 // Ignore all mutations until OnClearComplete time. | 84 // Ignore all mutations until OnClearComplete time. |
| 85 ignore_all_mutations_ = true; | 85 ignore_all_mutations_ = true; |
| 86 proxy_->ClearArea( | 86 proxy_->ClearArea( |
| 87 connection_id, page_url, | 87 connection_id, page_url, |
| 88 base::Bind(&DomStorageCachedArea::OnClearComplete, | 88 base::Bind(&DomStorageCachedArea::OnClearComplete, |
| 89 weak_factory_.GetWeakPtr())); | 89 weak_factory_.GetWeakPtr())); |
| 90 } | 90 } |
| 91 | 91 |
| 92 void DomStorageCachedArea::ApplyMutation( | 92 void DomStorageCachedArea::ApplyMutation( |
| 93 const NullableString16& key, const NullableString16& new_value) { | 93 const base::NullableString16& key, |
| 94 const base::NullableString16& new_value) { |
| 94 if (!map_.get() || ignore_all_mutations_) | 95 if (!map_.get() || ignore_all_mutations_) |
| 95 return; | 96 return; |
| 96 | 97 |
| 97 if (key.is_null()) { | 98 if (key.is_null()) { |
| 98 // It's a clear event. | 99 // It's a clear event. |
| 99 scoped_refptr<DomStorageMap> old = map_; | 100 scoped_refptr<DomStorageMap> old = map_; |
| 100 map_ = new DomStorageMap(dom_storage::kPerAreaQuota); | 101 map_ = new DomStorageMap(dom_storage::kPerAreaQuota); |
| 101 | 102 |
| 102 // We have to retain local additions which happened after this | 103 // We have to retain local additions which happened after this |
| 103 // clear operation from another process. | 104 // clear operation from another process. |
| 104 std::map<base::string16, int>::iterator iter = | 105 std::map<base::string16, int>::iterator iter = |
| 105 ignore_key_mutations_.begin(); | 106 ignore_key_mutations_.begin(); |
| 106 while (iter != ignore_key_mutations_.end()) { | 107 while (iter != ignore_key_mutations_.end()) { |
| 107 NullableString16 value = old->GetItem(iter->first); | 108 base::NullableString16 value = old->GetItem(iter->first); |
| 108 if (!value.is_null()) { | 109 if (!value.is_null()) { |
| 109 NullableString16 unused; | 110 base::NullableString16 unused; |
| 110 map_->SetItem(iter->first, value.string(), &unused); | 111 map_->SetItem(iter->first, value.string(), &unused); |
| 111 } | 112 } |
| 112 ++iter; | 113 ++iter; |
| 113 } | 114 } |
| 114 return; | 115 return; |
| 115 } | 116 } |
| 116 | 117 |
| 117 // We have to retain local changes. | 118 // We have to retain local changes. |
| 118 if (should_ignore_key_mutation(key.string())) | 119 if (should_ignore_key_mutation(key.string())) |
| 119 return; | 120 return; |
| 120 | 121 |
| 121 if (new_value.is_null()) { | 122 if (new_value.is_null()) { |
| 122 // It's a remove item event. | 123 // It's a remove item event. |
| 123 base::string16 unused; | 124 base::string16 unused; |
| 124 map_->RemoveItem(key.string(), &unused); | 125 map_->RemoveItem(key.string(), &unused); |
| 125 return; | 126 return; |
| 126 } | 127 } |
| 127 | 128 |
| 128 // It's a set item event. | 129 // It's a set item event. |
| 129 // We turn off quota checking here to accomodate the over budget | 130 // We turn off quota checking here to accomodate the over budget |
| 130 // allowance that's provided in the browser process. | 131 // allowance that's provided in the browser process. |
| 131 NullableString16 unused; | 132 base::NullableString16 unused; |
| 132 map_->set_quota(kint32max); | 133 map_->set_quota(kint32max); |
| 133 map_->SetItem(key.string(), new_value.string(), &unused); | 134 map_->SetItem(key.string(), new_value.string(), &unused); |
| 134 map_->set_quota(dom_storage::kPerAreaQuota); | 135 map_->set_quota(dom_storage::kPerAreaQuota); |
| 135 } | 136 } |
| 136 | 137 |
| 137 size_t DomStorageCachedArea::MemoryBytesUsedByCache() const { | 138 size_t DomStorageCachedArea::MemoryBytesUsedByCache() const { |
| 138 return map_.get() ? map_->bytes_used() : 0; | 139 return map_.get() ? map_->bytes_used() : 0; |
| 139 } | 140 } |
| 140 | 141 |
| 141 void DomStorageCachedArea::Prime(int connection_id) { | 142 void DomStorageCachedArea::Prime(int connection_id) { |
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| 221 ignore_key_mutations_.erase(found); | 222 ignore_key_mutations_.erase(found); |
| 222 } | 223 } |
| 223 | 224 |
| 224 void DomStorageCachedArea::OnClearComplete(bool success) { | 225 void DomStorageCachedArea::OnClearComplete(bool success) { |
| 225 DCHECK(success); | 226 DCHECK(success); |
| 226 DCHECK(ignore_all_mutations_); | 227 DCHECK(ignore_all_mutations_); |
| 227 ignore_all_mutations_ = false; | 228 ignore_all_mutations_ = false; |
| 228 } | 229 } |
| 229 | 230 |
| 230 } // namespace dom_storage | 231 } // namespace dom_storage |
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