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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 "components/content_settings/core/browser/content_settings_utils.h"
#include <vector>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/prefs/pref_registry.h"
#include "base/strings/string_split.h"
#include "base/values.h"
#include "components/content_settings/core/browser/content_settings_provider.h"
#include "components/content_settings/core/browser/content_settings_rule.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/content_settings/core/browser/website_settings_info.h"
#include "components/content_settings/core/browser/website_settings_registry.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "url/gurl.h"
namespace {
const char kPatternSeparator[] = ",";
} // namespace
namespace content_settings {
std::string GetTypeName(ContentSettingsType type) {
return WebsiteSettingsRegistry::GetInstance()->Get(type)->name();
}
std::string ContentSettingToString(ContentSetting setting) {
switch (setting) {
case CONTENT_SETTING_ALLOW:
return "allow";
case CONTENT_SETTING_ASK:
return "ask";
case CONTENT_SETTING_BLOCK:
return "block";
case CONTENT_SETTING_SESSION_ONLY:
return "session";
case CONTENT_SETTING_DETECT_IMPORTANT_CONTENT:
return "detect";
case CONTENT_SETTING_DEFAULT:
return "default";
case CONTENT_SETTING_NUM_SETTINGS:
NOTREACHED();
}
return ResourceIdentifier();
}
ContentSetting ContentSettingFromString(const std::string& name) {
if (name == "allow")
return CONTENT_SETTING_ALLOW;
if (name == "ask")
return CONTENT_SETTING_ASK;
if (name == "block")
return CONTENT_SETTING_BLOCK;
if (name == "session")
return CONTENT_SETTING_SESSION_ONLY;
if (name == "detect")
return CONTENT_SETTING_DETECT_IMPORTANT_CONTENT;
NOTREACHED() << name << " is not a recognized content setting.";
return CONTENT_SETTING_DEFAULT;
}
std::string CreatePatternString(
const ContentSettingsPattern& item_pattern,
const ContentSettingsPattern& top_level_frame_pattern) {
return item_pattern.ToString()
+ std::string(kPatternSeparator)
+ top_level_frame_pattern.ToString();
}
PatternPair ParsePatternString(const std::string& pattern_str) {
std::vector<std::string> pattern_str_list = base::SplitString(
pattern_str, std::string(1, kPatternSeparator[0]),
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
// If the |pattern_str| is an empty string then the |pattern_string_list|
// contains a single empty string. In this case the empty string will be
// removed to signal an invalid |pattern_str|. Invalid pattern strings are
// handle by the "if"-statment below. So the order of the if statements here
// must be preserved.
if (pattern_str_list.size() == 1) {
if (pattern_str_list[0].empty()) {
pattern_str_list.pop_back();
} else {
pattern_str_list.push_back("*");
}
}
if (pattern_str_list.size() > 2 ||
pattern_str_list.size() == 0) {
return PatternPair(ContentSettingsPattern(),
ContentSettingsPattern());
}
PatternPair pattern_pair;
pattern_pair.first =
ContentSettingsPattern::FromString(pattern_str_list[0]);
pattern_pair.second =
ContentSettingsPattern::FromString(pattern_str_list[1]);
return pattern_pair;
}
ContentSetting ValueToContentSetting(const base::Value* value) {
ContentSetting setting = CONTENT_SETTING_DEFAULT;
bool valid = ParseContentSettingValue(value, &setting);
DCHECK(valid);
return setting;
}
bool ParseContentSettingValue(const base::Value* value,
ContentSetting* setting) {
if (!value) {
*setting = CONTENT_SETTING_DEFAULT;
return true;
}
int int_value = -1;
if (!value->GetAsInteger(&int_value))
return false;
*setting = IntToContentSetting(int_value);
return *setting != CONTENT_SETTING_DEFAULT;
}
scoped_ptr<base::Value> ContentSettingToValue(ContentSetting setting) {
if (setting <= CONTENT_SETTING_DEFAULT ||
setting >= CONTENT_SETTING_NUM_SETTINGS) {
return nullptr;
}
return make_scoped_ptr(new base::FundamentalValue(setting));
}
base::Value* GetContentSettingValueAndPatterns(
const ProviderInterface* provider,
const GURL& primary_url,
const GURL& secondary_url,
ContentSettingsType content_type,
const std::string& resource_identifier,
bool include_incognito,
ContentSettingsPattern* primary_pattern,
ContentSettingsPattern* secondary_pattern) {
if (include_incognito) {
// Check incognito-only specific settings. It's essential that the
// |RuleIterator| gets out of scope before we get a rule iterator for the
// normal mode.
scoped_ptr<RuleIterator> incognito_rule_iterator(
provider->GetRuleIterator(content_type, resource_identifier, true));
base::Value* value = GetContentSettingValueAndPatterns(
incognito_rule_iterator.get(), primary_url, secondary_url,
primary_pattern, secondary_pattern);
if (value)
return value;
}
// No settings from the incognito; use the normal mode.
scoped_ptr<RuleIterator> rule_iterator(
provider->GetRuleIterator(content_type, resource_identifier, false));
return GetContentSettingValueAndPatterns(
rule_iterator.get(), primary_url, secondary_url,
primary_pattern, secondary_pattern);
}
base::Value* GetContentSettingValueAndPatterns(
RuleIterator* rule_iterator,
const GURL& primary_url,
const GURL& secondary_url,
ContentSettingsPattern* primary_pattern,
ContentSettingsPattern* secondary_pattern) {
while (rule_iterator->HasNext()) {
const Rule& rule = rule_iterator->Next();
if (rule.primary_pattern.Matches(primary_url) &&
rule.secondary_pattern.Matches(secondary_url)) {
if (primary_pattern)
*primary_pattern = rule.primary_pattern;
if (secondary_pattern)
*secondary_pattern = rule.secondary_pattern;
return rule.value.get()->DeepCopy();
}
}
return NULL;
}
void GetRendererContentSettingRules(const HostContentSettingsMap* map,
RendererContentSettingRules* rules) {
map->GetSettingsForOneType(
CONTENT_SETTINGS_TYPE_IMAGES,
ResourceIdentifier(),
&(rules->image_rules));
map->GetSettingsForOneType(
CONTENT_SETTINGS_TYPE_JAVASCRIPT,
ResourceIdentifier(),
&(rules->script_rules));
}
uint32 PrefRegistrationFlagsForType(ContentSettingsType content_type) {
uint32 flags = PrefRegistry::NO_REGISTRATION_FLAGS;
if (IsContentSettingsTypeSyncable(content_type))
flags |= user_prefs::PrefRegistrySyncable::SYNCABLE_PREF;
if (IsContentSettingsTypeLossy(content_type))
flags |= PrefRegistry::LOSSY_PREF;
return flags;
}
} // namespace content_settings
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