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// Copyright (c) 2012 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 "chrome/browser/content_settings/content_settings_origin_identifier_value_map.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/values.h"
#include "chrome/browser/content_settings/content_settings_rule.h"
#include "chrome/browser/content_settings/content_settings_utils.h"
#include "chrome/common/content_settings_types.h"
#include "googleurl/src/gurl.h"
namespace content_settings {
namespace {
// This iterator is used for iterating the rules for |content_type| and
// |resource_identifier| in the precedence order of the rules.
class RuleIteratorImpl : public RuleIterator {
public:
// |RuleIteratorImpl| takes the ownership of |auto_lock|.
RuleIteratorImpl(
const OriginIdentifierValueMap::Rules::const_iterator& current_rule,
const OriginIdentifierValueMap::Rules::const_iterator& rule_end,
base::AutoLock* auto_lock)
: current_rule_(current_rule),
rule_end_(rule_end),
auto_lock_(auto_lock) {
}
virtual ~RuleIteratorImpl() {}
virtual bool HasNext() const OVERRIDE {
return (current_rule_ != rule_end_);
}
virtual Rule Next() OVERRIDE {
DCHECK(current_rule_ != rule_end_);
DCHECK(current_rule_->second.get());
Rule to_return(current_rule_->first.primary_pattern,
current_rule_->first.secondary_pattern,
current_rule_->second.get()->DeepCopy());
++current_rule_;
return to_return;
}
private:
OriginIdentifierValueMap::Rules::const_iterator current_rule_;
OriginIdentifierValueMap::Rules::const_iterator rule_end_;
scoped_ptr<base::AutoLock> auto_lock_;
};
} // namespace
OriginIdentifierValueMap::EntryMapKey::EntryMapKey(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier)
: content_type(content_type),
resource_identifier(resource_identifier) {
}
bool OriginIdentifierValueMap::EntryMapKey::operator<(
const OriginIdentifierValueMap::EntryMapKey& other) const {
if (content_type != other.content_type)
return content_type < other.content_type;
return (resource_identifier < other.resource_identifier);
}
OriginIdentifierValueMap::PatternPair::PatternPair(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern)
: primary_pattern(primary_pattern),
secondary_pattern(secondary_pattern) {
}
bool OriginIdentifierValueMap::PatternPair::operator<(
const OriginIdentifierValueMap::PatternPair& other) const {
// Note that this operator is the other way around than
// |ContentSettingsPattern::operator<|. It sorts patterns with higher
// precedence first.
if (primary_pattern > other.primary_pattern)
return true;
else if (other.primary_pattern > primary_pattern)
return false;
return (secondary_pattern > other.secondary_pattern);
}
RuleIterator* OriginIdentifierValueMap::GetRuleIterator(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
base::Lock* lock) const {
EntryMapKey key(content_type, resource_identifier);
// We access |entries_| here, so we need to lock |lock_| first. The lock must
// be passed to the |RuleIteratorImpl| in a locked state, so that nobody can
// access |entries_| after |find()| but before the |RuleIteratorImpl| is
// created.
scoped_ptr<base::AutoLock> auto_lock;
if (lock)
auto_lock.reset(new base::AutoLock(*lock));
EntryMap::const_iterator it = entries_.find(key);
if (it == entries_.end())
return new EmptyRuleIterator();
return new RuleIteratorImpl(it->second.begin(),
it->second.end(),
auto_lock.release());
}
size_t OriginIdentifierValueMap::size() const {
size_t size = 0;
EntryMap::const_iterator it;
for (it = entries_.begin(); it != entries_.end(); ++it)
size += it->second.size();
return size;
}
OriginIdentifierValueMap::OriginIdentifierValueMap() {}
OriginIdentifierValueMap::~OriginIdentifierValueMap() {}
Value* OriginIdentifierValueMap::GetValue(
const GURL& primary_url,
const GURL& secondary_url,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) const {
EntryMapKey key(content_type, resource_identifier);
EntryMap::const_iterator it = entries_.find(key);
if (it == entries_.end())
return NULL;
// Iterate the entries in until a match is found. Since the rules are stored
// in the order of decreasing precedence, the most specific match is found
// first.
Rules::const_iterator entry;
for (entry = it->second.begin(); entry != it->second.end(); ++entry) {
if (entry->first.primary_pattern.Matches(primary_url) &&
entry->first.secondary_pattern.Matches(secondary_url)) {
return entry->second.get();
}
}
return NULL;
}
void OriginIdentifierValueMap::SetValue(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
Value* value) {
DCHECK(primary_pattern.IsValid());
DCHECK(secondary_pattern.IsValid());
DCHECK(value);
EntryMapKey key(content_type, resource_identifier);
PatternPair patterns(primary_pattern, secondary_pattern);
// This will create the entry and the linked_ptr if needed.
entries_[key][patterns].reset(value);
}
void OriginIdentifierValueMap::DeleteValue(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) {
EntryMapKey key(content_type, resource_identifier);
PatternPair patterns(primary_pattern, secondary_pattern);
entries_[key].erase(patterns);
if (entries_[key].empty()) {
entries_.erase(key);
}
}
void OriginIdentifierValueMap::DeleteValues(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) {
EntryMapKey key(content_type, resource_identifier);
entries_.erase(key);
}
void OriginIdentifierValueMap::clear() {
// Delete all owned value objects.
entries_.clear();
}
} // namespace content_settings
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