1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/system/gonk/AutoMounterSetting.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,292 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "AutoMounter.h"
1.9 +#include "AutoMounterSetting.h"
1.10 +
1.11 +#include "base/message_loop.h"
1.12 +#include "jsapi.h"
1.13 +#include "mozilla/Services.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsDebug.h"
1.16 +#include "nsIObserverService.h"
1.17 +#include "nsCxPusher.h"
1.18 +#include "nsISettingsService.h"
1.19 +#include "nsJSUtils.h"
1.20 +#include "nsPrintfCString.h"
1.21 +#include "nsServiceManagerUtils.h"
1.22 +#include "nsString.h"
1.23 +#include "nsThreadUtils.h"
1.24 +#include "xpcpublic.h"
1.25 +#include "mozilla/Attributes.h"
1.26 +
1.27 +#undef LOG
1.28 +#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "AutoMounterSetting" , ## args)
1.29 +#define ERR(args...) __android_log_print(ANDROID_LOG_ERROR, "AutoMounterSetting" , ## args)
1.30 +
1.31 +#define UMS_MODE "ums.mode"
1.32 +#define UMS_STATUS "ums.status"
1.33 +#define UMS_VOLUME_ENABLED_PREFIX "ums.volume."
1.34 +#define UMS_VOLUME_ENABLED_SUFFIX ".enabled"
1.35 +#define MOZSETTINGS_CHANGED "mozsettings-changed"
1.36 +
1.37 +namespace mozilla {
1.38 +namespace system {
1.39 +
1.40 +class SettingsServiceCallback MOZ_FINAL : public nsISettingsServiceCallback
1.41 +{
1.42 +public:
1.43 + NS_DECL_THREADSAFE_ISUPPORTS
1.44 +
1.45 + SettingsServiceCallback() {}
1.46 +
1.47 + NS_IMETHOD Handle(const nsAString& aName, JS::Handle<JS::Value> aResult)
1.48 + {
1.49 + if (JSVAL_IS_INT(aResult)) {
1.50 + int32_t mode = JSVAL_TO_INT(aResult);
1.51 + SetAutoMounterMode(mode);
1.52 + }
1.53 + return NS_OK;
1.54 + }
1.55 +
1.56 + NS_IMETHOD HandleError(const nsAString& aName)
1.57 + {
1.58 + ERR("SettingsCallback::HandleError: %s\n", NS_LossyConvertUTF16toASCII(aName).get());
1.59 + return NS_OK;
1.60 + }
1.61 +};
1.62 +
1.63 +NS_IMPL_ISUPPORTS(SettingsServiceCallback, nsISettingsServiceCallback)
1.64 +
1.65 +class CheckVolumeSettingsCallback MOZ_FINAL : public nsISettingsServiceCallback
1.66 +{
1.67 +public:
1.68 + NS_DECL_THREADSAFE_ISUPPORTS
1.69 +
1.70 + CheckVolumeSettingsCallback(const nsACString& aVolumeName)
1.71 + : mVolumeName(aVolumeName) {}
1.72 +
1.73 + NS_IMETHOD Handle(const nsAString& aName, JS::Handle<JS::Value> aResult)
1.74 + {
1.75 + if (JSVAL_IS_BOOLEAN(aResult)) {
1.76 + bool isSharingEnabled = JSVAL_TO_BOOLEAN(aResult);
1.77 + SetAutoMounterSharingMode(mVolumeName, isSharingEnabled);
1.78 + }
1.79 + return NS_OK;
1.80 + }
1.81 +
1.82 + NS_IMETHOD HandleError(const nsAString& aName)
1.83 + {
1.84 + ERR("CheckVolumeSettingsCallback::HandleError: %s\n", NS_LossyConvertUTF16toASCII(aName).get());
1.85 + return NS_OK;
1.86 + }
1.87 +private:
1.88 + nsCString mVolumeName;
1.89 +};
1.90 +
1.91 +NS_IMPL_ISUPPORTS(CheckVolumeSettingsCallback, nsISettingsServiceCallback)
1.92 +
1.93 +AutoMounterSetting::AutoMounterSetting()
1.94 + : mStatus(AUTOMOUNTER_STATUS_DISABLED)
1.95 +{
1.96 + MOZ_ASSERT(NS_IsMainThread());
1.97 +
1.98 + // Setup an observer to watch changes to the setting
1.99 + nsCOMPtr<nsIObserverService> observerService =
1.100 + mozilla::services::GetObserverService();
1.101 + if (!observerService) {
1.102 + ERR("GetObserverService failed");
1.103 + return;
1.104 + }
1.105 + nsresult rv;
1.106 + rv = observerService->AddObserver(this, MOZSETTINGS_CHANGED, false);
1.107 + if (NS_FAILED(rv)) {
1.108 + ERR("AddObserver failed");
1.109 + return;
1.110 + }
1.111 +
1.112 + // Force ums.mode to be 0 initially. We do this because settings are persisted.
1.113 + // We don't want UMS to be enabled until such time as the phone is unlocked,
1.114 + // and gaia/apps/system/js/storage.js takes care of detecting when the phone
1.115 + // becomes unlocked and changes ums.mode appropriately.
1.116 + nsCOMPtr<nsISettingsService> settingsService =
1.117 + do_GetService("@mozilla.org/settingsService;1");
1.118 + if (!settingsService) {
1.119 + ERR("Failed to get settingsLock service!");
1.120 + return;
1.121 + }
1.122 + nsCOMPtr<nsISettingsServiceLock> lock;
1.123 + settingsService->CreateLock(nullptr, getter_AddRefs(lock));
1.124 + nsCOMPtr<nsISettingsServiceCallback> callback = new SettingsServiceCallback();
1.125 + mozilla::AutoSafeJSContext cx;
1.126 + JS::Rooted<JS::Value> value(cx);
1.127 + value.setInt32(AUTOMOUNTER_DISABLE);
1.128 + lock->Set(UMS_MODE, value, callback, nullptr);
1.129 + value.setInt32(mStatus);
1.130 + lock->Set(UMS_STATUS, value, nullptr, nullptr);
1.131 +}
1.132 +
1.133 +AutoMounterSetting::~AutoMounterSetting()
1.134 +{
1.135 + nsCOMPtr<nsIObserverService> observerService =
1.136 + mozilla::services::GetObserverService();
1.137 + if (observerService) {
1.138 + observerService->RemoveObserver(this, MOZSETTINGS_CHANGED);
1.139 + }
1.140 +}
1.141 +
1.142 +NS_IMPL_ISUPPORTS(AutoMounterSetting, nsIObserver)
1.143 +
1.144 +const char *
1.145 +AutoMounterSetting::StatusStr(int32_t aStatus)
1.146 +{
1.147 + switch (aStatus) {
1.148 + case AUTOMOUNTER_STATUS_DISABLED: return "Disabled";
1.149 + case AUTOMOUNTER_STATUS_ENABLED: return "Enabled";
1.150 + case AUTOMOUNTER_STATUS_FILES_OPEN: return "FilesOpen";
1.151 + }
1.152 + return "??? Unknown ???";
1.153 +}
1.154 +
1.155 +class CheckVolumeSettingsRunnable : public nsRunnable
1.156 +{
1.157 +public:
1.158 + CheckVolumeSettingsRunnable(const nsACString& aVolumeName)
1.159 + : mVolumeName(aVolumeName) {}
1.160 +
1.161 + NS_IMETHOD Run()
1.162 + {
1.163 + MOZ_ASSERT(NS_IsMainThread());
1.164 + nsCOMPtr<nsISettingsService> settingsService =
1.165 + do_GetService("@mozilla.org/settingsService;1");
1.166 + NS_ENSURE_TRUE(settingsService, NS_ERROR_FAILURE);
1.167 + nsCOMPtr<nsISettingsServiceLock> lock;
1.168 + settingsService->CreateLock(nullptr, getter_AddRefs(lock));
1.169 + nsCOMPtr<nsISettingsServiceCallback> callback =
1.170 + new CheckVolumeSettingsCallback(mVolumeName);
1.171 + nsPrintfCString setting(UMS_VOLUME_ENABLED_PREFIX "%s" UMS_VOLUME_ENABLED_SUFFIX,
1.172 + mVolumeName.get());
1.173 + lock->Get(setting.get(), callback);
1.174 + return NS_OK;
1.175 + }
1.176 +
1.177 +private:
1.178 + nsCString mVolumeName;
1.179 +};
1.180 +
1.181 +//static
1.182 +void
1.183 +AutoMounterSetting::CheckVolumeSettings(const nsACString& aVolumeName)
1.184 +{
1.185 + NS_DispatchToMainThread(new CheckVolumeSettingsRunnable(aVolumeName));
1.186 +}
1.187 +
1.188 +class SetStatusRunnable : public nsRunnable
1.189 +{
1.190 +public:
1.191 + SetStatusRunnable(int32_t aStatus) : mStatus(aStatus) {}
1.192 +
1.193 + NS_IMETHOD Run()
1.194 + {
1.195 + MOZ_ASSERT(NS_IsMainThread());
1.196 + nsCOMPtr<nsISettingsService> settingsService =
1.197 + do_GetService("@mozilla.org/settingsService;1");
1.198 + NS_ENSURE_TRUE(settingsService, NS_ERROR_FAILURE);
1.199 + nsCOMPtr<nsISettingsServiceLock> lock;
1.200 + settingsService->CreateLock(nullptr, getter_AddRefs(lock));
1.201 + // lock may be null if this gets called during shutdown.
1.202 + if (lock) {
1.203 + mozilla::AutoSafeJSContext cx;
1.204 + JS::Rooted<JS::Value> value(cx, JS::Int32Value(mStatus));
1.205 + lock->Set(UMS_STATUS, value, nullptr, nullptr);
1.206 + }
1.207 + return NS_OK;
1.208 + }
1.209 +
1.210 +private:
1.211 + int32_t mStatus;
1.212 +};
1.213 +
1.214 +//static
1.215 +void
1.216 +AutoMounterSetting::SetStatus(int32_t aStatus)
1.217 +{
1.218 + if (aStatus != mStatus) {
1.219 + LOG("Changing status from '%s' to '%s'",
1.220 + StatusStr(mStatus), StatusStr(aStatus));
1.221 + mStatus = aStatus;
1.222 + NS_DispatchToMainThread(new SetStatusRunnable(aStatus));
1.223 + }
1.224 +}
1.225 +
1.226 +NS_IMETHODIMP
1.227 +AutoMounterSetting::Observe(nsISupports* aSubject,
1.228 + const char* aTopic,
1.229 + const char16_t* aData)
1.230 +{
1.231 + if (strcmp(aTopic, MOZSETTINGS_CHANGED) != 0) {
1.232 + return NS_OK;
1.233 + }
1.234 +
1.235 + // Note that this function gets called for any and all settings changes,
1.236 + // so we need to carefully check if we have the one we're interested in.
1.237 + //
1.238 + // The string that we're interested in will be a JSON string that looks like:
1.239 + // {"key":"ums.autoMount","value":true}
1.240 +
1.241 + mozilla::AutoSafeJSContext cx;
1.242 + nsDependentString dataStr(aData);
1.243 + JS::Rooted<JS::Value> val(cx);
1.244 + if (!JS_ParseJSON(cx, dataStr.get(), dataStr.Length(), &val) ||
1.245 + !val.isObject()) {
1.246 + return NS_OK;
1.247 + }
1.248 + JS::Rooted<JSObject*> obj(cx, &val.toObject());
1.249 + JS::Rooted<JS::Value> key(cx);
1.250 + if (!JS_GetProperty(cx, obj, "key", &key) ||
1.251 + !key.isString()) {
1.252 + return NS_OK;
1.253 + }
1.254 +
1.255 + JSString *jsKey = JS::ToString(cx, key);
1.256 + nsDependentJSString keyStr;
1.257 + if (!keyStr.init(cx, jsKey)) {
1.258 + return NS_OK;
1.259 + }
1.260 +
1.261 + JS::Rooted<JS::Value> value(cx);
1.262 + if (!JS_GetProperty(cx, obj, "value", &value)) {
1.263 + return NS_OK;
1.264 + }
1.265 +
1.266 + // Check for ums.mode changes
1.267 + if (keyStr.EqualsLiteral(UMS_MODE)) {
1.268 + if (!value.isInt32()) {
1.269 + return NS_OK;
1.270 + }
1.271 + int32_t mode = value.toInt32();
1.272 + SetAutoMounterMode(mode);
1.273 + return NS_OK;
1.274 + }
1.275 +
1.276 + // Check for ums.volume.NAME.enabled
1.277 + if (StringBeginsWith(keyStr, NS_LITERAL_STRING(UMS_VOLUME_ENABLED_PREFIX)) &&
1.278 + StringEndsWith(keyStr, NS_LITERAL_STRING(UMS_VOLUME_ENABLED_SUFFIX))) {
1.279 + if (!value.isBoolean()) {
1.280 + return NS_OK;
1.281 + }
1.282 + const size_t prefixLen = sizeof(UMS_VOLUME_ENABLED_PREFIX) - 1;
1.283 + const size_t suffixLen = sizeof(UMS_VOLUME_ENABLED_SUFFIX) - 1;
1.284 + nsDependentSubstring volumeName =
1.285 + Substring(keyStr, prefixLen, keyStr.Length() - prefixLen - suffixLen);
1.286 + bool isSharingEnabled = value.toBoolean();
1.287 + SetAutoMounterSharingMode(NS_LossyConvertUTF16toASCII(volumeName), isSharingEnabled);
1.288 + return NS_OK;
1.289 + }
1.290 +
1.291 + return NS_OK;
1.292 +}
1.293 +
1.294 +} // namespace system
1.295 +} // namespace mozilla
