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// Copyright 2013 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 "content/browser/dom_storage/dom_storage_host.h"
#include "content/browser/dom_storage/dom_storage_area.h"
#include "content/browser/dom_storage/dom_storage_context_impl.h"
#include "content/browser/dom_storage/dom_storage_namespace.h"
#include "content/common/dom_storage/dom_storage_types.h"
#include "url/gurl.h"
namespace content {
DOMStorageHost::DOMStorageHost(DOMStorageContextImpl* context)
: context_(context) {
}
DOMStorageHost::~DOMStorageHost() {
AreaMap::const_iterator it = connections_.begin();
for (; it != connections_.end(); ++it)
it->second.namespace_->CloseStorageArea(it->second.area_.get());
connections_.clear(); // Clear prior to releasing the context_
}
bool DOMStorageHost::OpenStorageArea(int connection_id, int namespace_id,
const GURL& origin) {
DCHECK(!GetOpenArea(connection_id));
if (GetOpenArea(connection_id))
return false; // Indicates the renderer gave us very bad data.
NamespaceAndArea references;
references.namespace_ = context_->GetStorageNamespace(namespace_id);
if (!references.namespace_.get())
return false;
references.area_ = references.namespace_->OpenStorageArea(origin);
DCHECK(references.area_.get());
connections_[connection_id] = references;
return true;
}
void DOMStorageHost::CloseStorageArea(int connection_id) {
AreaMap::iterator found = connections_.find(connection_id);
if (found == connections_.end())
return;
found->second.namespace_->CloseStorageArea(found->second.area_.get());
connections_.erase(found);
}
bool DOMStorageHost::ExtractAreaValues(
int connection_id, DOMStorageValuesMap* map) {
map->clear();
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return false;
if (!area->IsLoadedInMemory()) {
DOMStorageNamespace* ns = GetNamespace(connection_id);
DCHECK(ns);
if (ns->CountInMemoryAreas() > kMaxInMemoryStorageAreas) {
ns->PurgeMemory(DOMStorageNamespace::PURGE_UNOPENED);
if (ns->CountInMemoryAreas() > kMaxInMemoryStorageAreas)
ns->PurgeMemory(DOMStorageNamespace::PURGE_AGGRESSIVE);
}
}
area->ExtractValues(map);
return true;
}
unsigned DOMStorageHost::GetAreaLength(int connection_id) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return 0;
return area->Length();
}
base::NullableString16 DOMStorageHost::GetAreaKey(int connection_id,
unsigned index) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return base::NullableString16();
return area->Key(index);
}
base::NullableString16 DOMStorageHost::GetAreaItem(int connection_id,
const base::string16& key) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return base::NullableString16();
return area->GetItem(key);
}
bool DOMStorageHost::SetAreaItem(
int connection_id, const base::string16& key,
const base::string16& value, const GURL& page_url,
base::NullableString16* old_value) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return false;
if (!area->SetItem(key, value, old_value))
return false;
if (old_value->is_null() || old_value->string() != value)
context_->NotifyItemSet(area, key, value, *old_value, page_url);
return true;
}
bool DOMStorageHost::RemoveAreaItem(
int connection_id, const base::string16& key, const GURL& page_url,
base::string16* old_value) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return false;
if (!area->RemoveItem(key, old_value))
return false;
context_->NotifyItemRemoved(area, key, *old_value, page_url);
return true;
}
bool DOMStorageHost::ClearArea(int connection_id, const GURL& page_url) {
DOMStorageArea* area = GetOpenArea(connection_id);
if (!area)
return false;
if (!area->Clear())
return false;
context_->NotifyAreaCleared(area, page_url);
return true;
}
bool DOMStorageHost::HasAreaOpen(
int namespace_id, const GURL& origin) const {
AreaMap::const_iterator it = connections_.begin();
for (; it != connections_.end(); ++it) {
if (namespace_id == it->second.namespace_->namespace_id() &&
origin == it->second.area_->origin()) {
return true;
}
}
return false;
}
DOMStorageArea* DOMStorageHost::GetOpenArea(int connection_id) {
AreaMap::iterator found = connections_.find(connection_id);
if (found == connections_.end())
return NULL;
return found->second.area_.get();
}
DOMStorageNamespace* DOMStorageHost::GetNamespace(int connection_id) {
AreaMap::iterator found = connections_.find(connection_id);
if (found == connections_.end())
return NULL;
return found->second.namespace_.get();
}
// NamespaceAndArea
DOMStorageHost::NamespaceAndArea::NamespaceAndArea() {}
DOMStorageHost::NamespaceAndArea::NamespaceAndArea(
const NamespaceAndArea& other) = default;
DOMStorageHost::NamespaceAndArea::~NamespaceAndArea() {}
} // namespace content
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