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// Copyright 2016 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/ui/webui/site_settings_helper.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/prefs/pref_service.h"
namespace site_settings {
const char kSetting[] = "setting";
const char kOrigin[] = "origin";
const char kPolicyProviderId[] = "policy";
const char kSource[] = "source";
const char kEmbeddingOrigin[] = "embeddingOrigin";
const char kPreferencesSource[] = "preference";
// Create a DictionaryValue* that will act as a data source for a single row
// in a HostContentSettingsMap-controlled exceptions table (e.g., cookies).
scoped_ptr<base::DictionaryValue> GetExceptionForPage(
const ContentSettingsPattern& pattern,
const ContentSettingsPattern& secondary_pattern,
const ContentSetting& setting,
const std::string& provider_name) {
base::DictionaryValue* exception = new base::DictionaryValue();
exception->SetString(kOrigin, pattern.ToString());
exception->SetString(kEmbeddingOrigin,
secondary_pattern == ContentSettingsPattern::Wildcard() ?
std::string() :
secondary_pattern.ToString());
std::string setting_string =
content_settings::ContentSettingToString(setting);
DCHECK(!setting_string.empty());
exception->SetString(kSetting, setting_string);
exception->SetString(kSource, provider_name);
return make_scoped_ptr(exception);
}
void GetExceptionsFromHostContentSettingsMap(const HostContentSettingsMap* map,
ContentSettingsType type,
content::WebUI* web_ui,
base::ListValue* exceptions) {
ContentSettingsForOneType entries;
map->GetSettingsForOneType(type, std::string(), &entries);
// Group settings by primary_pattern.
AllPatternsSettings all_patterns_settings;
for (ContentSettingsForOneType::iterator i = entries.begin();
i != entries.end(); ++i) {
// Don't add default settings.
if (i->primary_pattern == ContentSettingsPattern::Wildcard() &&
i->secondary_pattern == ContentSettingsPattern::Wildcard() &&
i->source != kPreferencesSource) {
continue;
}
// Off-the-record HostContentSettingsMap contains incognito content settings
// as well as normal content settings. Here, we use the incongnito settings
// only.
if (map->is_off_the_record() && !i->incognito)
continue;
all_patterns_settings[std::make_pair(i->primary_pattern, i->source)]
[i->secondary_pattern] = i->setting;
}
// Keep the exceptions sorted by provider so they will be displayed in
// precedence order.
std::vector<scoped_ptr<base::DictionaryValue>>
all_provider_exceptions[HostContentSettingsMap::NUM_PROVIDER_TYPES];
// |all_patterns_settings| is sorted from the lowest precedence pattern to
// the highest (see operator< in ContentSettingsPattern), so traverse it in
// reverse to show the patterns with the highest precedence (the more specific
// ones) on the top.
for (AllPatternsSettings::reverse_iterator i = all_patterns_settings.rbegin();
i != all_patterns_settings.rend();
++i) {
const ContentSettingsPattern& primary_pattern = i->first.first;
const OnePatternSettings& one_settings = i->second;
// The "parent" entry either has an identical primary and secondary pattern,
// or has a wildcard secondary. The two cases are indistinguishable in the
// UI.
OnePatternSettings::const_iterator parent =
one_settings.find(primary_pattern);
if (parent == one_settings.end())
parent = one_settings.find(ContentSettingsPattern::Wildcard());
const std::string& source = i->first.second;
auto& this_provider_exceptions = all_provider_exceptions
[HostContentSettingsMap::GetProviderTypeFromSource(source)];
// Add the "parent" entry for the non-embedded setting.
ContentSetting parent_setting =
parent == one_settings.end() ? CONTENT_SETTING_DEFAULT : parent->second;
const ContentSettingsPattern& secondary_pattern =
parent == one_settings.end() ? primary_pattern : parent->first;
this_provider_exceptions.push_back(GetExceptionForPage(
primary_pattern, secondary_pattern, parent_setting, source));
// Add the "children" for any embedded settings.
for (OnePatternSettings::const_iterator j = one_settings.begin();
j != one_settings.end(); ++j) {
// Skip the non-embedded setting which we already added above.
if (j == parent)
continue;
ContentSetting content_setting = j->second;
this_provider_exceptions.push_back(GetExceptionForPage(
primary_pattern, j->first, content_setting, source));
}
}
// For camera and microphone, we do not have policy exceptions, but we do have
// the policy-set allowed URLs, which should be displayed in the same manner.
if (type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC ||
type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA) {
auto& policy_exceptions = all_provider_exceptions
[HostContentSettingsMap::GetProviderTypeFromSource(kPolicyProviderId)];
DCHECK(policy_exceptions.empty());
GetPolicyAllowedUrls(type, &policy_exceptions, web_ui);
}
for (auto& one_provider_exceptions : all_provider_exceptions) {
for (auto& exception : one_provider_exceptions)
exceptions->Append(std::move(exception));
}
}
void GetPolicyAllowedUrls(
ContentSettingsType type,
std::vector<scoped_ptr<base::DictionaryValue>>* exceptions,
content::WebUI* web_ui) {
DCHECK(type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC ||
type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA);
PrefService* prefs = Profile::FromWebUI(web_ui)->GetPrefs();
const base::ListValue* policy_urls = prefs->GetList(
type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC
? prefs::kAudioCaptureAllowedUrls
: prefs::kVideoCaptureAllowedUrls);
// Convert the URLs to |ContentSettingsPattern|s. Ignore any invalid ones.
std::vector<ContentSettingsPattern> patterns;
for (const base::Value* entry : *policy_urls) {
std::string url;
bool valid_string = entry->GetAsString(&url);
if (!valid_string)
continue;
ContentSettingsPattern pattern = ContentSettingsPattern::FromString(url);
if (!pattern.IsValid())
continue;
patterns.push_back(pattern);
}
// The patterns are shown in the UI in a reverse order defined by
// |ContentSettingsPattern::operator<|.
std::sort(
patterns.begin(), patterns.end(), std::greater<ContentSettingsPattern>());
for (const ContentSettingsPattern& pattern : patterns) {
exceptions->push_back(GetExceptionForPage(pattern, ContentSettingsPattern(),
CONTENT_SETTING_ALLOW,
kPolicyProviderId));
}
}
} // namespace site_settings
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