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Text File  |  2012-06-08  |  7KB  |  174 lines
  1. /*
  2.  *=BEGIN SONGBIRD GPL
  3.  *
  4.  * This file is part of the Songbird web player.
  5.  *
  6.  * Copyright(c) 2005-2010 POTI, Inc.
  7.  * http://www.songbirdnest.com
  8.  *
  9.  * This file may be licensed under the terms of of the
  10.  * GNU General Public License Version 2 (the ``GPL'').
  11.  *
  12.  * Software distributed under the License is distributed
  13.  * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
  14.  * express or implied. See the GPL for the specific language
  15.  * governing rights and limitations.
  16.  *
  17.  * You should have received a copy of the GPL along with this
  18.  * program. If not, go to http://www.gnu.org/licenses/gpl.html
  19.  * or write to the Free Software Foundation, Inc.,
  20.  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21.  *
  22.  *=END SONGBIRD GPL
  23.  */
  24.  
  25. /**
  26.  * This is a helper class for devices
  27.  */
  28.  
  29. Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
  30. Components.utils.import("resource://app/jsmodules/ArrayConverter.jsm");
  31. Components.utils.import("resource://app/jsmodules/StringUtils.jsm");
  32.  
  33. const Ci = Components.interfaces;
  34. const Cc = Components.classes;
  35.  
  36. function BaseDeviceHelper() {}
  37.  
  38. BaseDeviceHelper.prototype = {
  39.  
  40. /*
  41.   boolean hasSpaceForWrite(in unsigned long long aSpaceNeeded,
  42.                            in sbIDeviceLibrary aLibrary,
  43.                            [optional] in sbIDevice aDevice,
  44.                            [optional] out unsigned long long aSpaceRemaining);
  45.  */
  46.   hasSpaceForWrite: function BaseDeviceHelper_hasSpaceForWrite(
  47.     aSpaceNeeded, aLibrary, aDevice, aSpaceRemaining)
  48.   {
  49.     var device = aDevice;
  50.     if (!device) {
  51.       // no device supplied, need to find it
  52.       const deviceMgr = Cc["@songbirdnest.com/Songbird/DeviceManager;2"]
  53.                           .getService(Ci.sbIDeviceRegistrar);
  54.       var foundLib = false;
  55.       for (device in ArrayConverter.JSArray(deviceMgr.devices)) {
  56.         for (var library in ArrayConverter.JSArray(device.content.libraries)) {
  57.           if (library.equals(aLibrary)) {
  58.             foundLib = true;
  59.             break;
  60.           }
  61.         }
  62.         if (foundLib)
  63.           break;
  64.       }
  65.       if (!foundLib) {
  66.         throw Components.Exception("Failed to find device for library");
  67.       }
  68.     }
  69.  
  70.     // figure out the space remaining
  71.     var spaceRemaining =
  72.       device.properties
  73.             .properties
  74.             .getPropertyAsInt64("http://songbirdnest.com/device/1.0#freeSpace");
  75.     if (aSpaceRemaining) {
  76.       aSpaceRemaining.value = spaceRemaining;
  77.     }
  78.  
  79.     // if we have enough space, no need to look at anything else
  80.     if (aSpaceNeeded < spaceRemaining)
  81.       return true;
  82.  
  83.     // need to ask the user
  84.     var messageKeyPrefix = this._getMessageKeyPrefix(aLibrary);
  85.  
  86.     storageConverter =
  87.       Cc["@songbirdnest.com/Songbird/Properties/UnitConverter/Storage;1"]
  88.         .createInstance(Ci.sbIPropertyUnitConverter);
  89.     var messageParams = [
  90.       device.name,
  91.       storageConverter.autoFormat(aSpaceNeeded, -1, 1),
  92.       storageConverter.autoFormat(spaceRemaining, -1, 1)
  93.     ];
  94.     var message = SBFormattedString(messageKeyPrefix + ".message",
  95.                                     messageParams);
  96.  
  97.     const prompter = Cc["@songbirdnest.com/Songbird/Prompter;1"]
  98.                        .getService(Ci.sbIPrompter);
  99.     var neverPromptAgain = { value: false };
  100.     var abortRequest = prompter.confirmEx(null, /* parent */
  101.                                           SBString(messageKeyPrefix + ".title"),
  102.                                           message,
  103.                                           Ci.nsIPromptService.STD_YES_NO_BUTTONS,
  104.                                           null, null, null, /* button text */
  105.                                           null, /* checkbox message TODO */
  106.                                           neverPromptAgain);
  107.     return (!abortRequest);
  108.   },
  109.  
  110. /*
  111.   boolean queryUserSpaceExceeded(in nsIDOMWindow       aParent,
  112.                                  in sbIDevice          aDevice,
  113.                                  in sbIDeviceLibrary   aLibrary,
  114.                                  in unsigned long long aSpaceNeeded,
  115.                                  in unsigned long long aSpaceAvailable);
  116.  */
  117.   queryUserSpaceExceeded: function BaseDeviceHelper_queryUserSpaceExceeded
  118.                                      (aParent,
  119.                                       aDevice,
  120.                                       aLibrary,
  121.                                       aSpaceNeeded,
  122.                                       aSpaceAvailable,
  123.                                       aAbort)
  124.   {
  125.     var messageKeyPrefix = this._getMessageKeyPrefix(aLibrary);
  126.  
  127.     storageConverter =
  128.       Cc["@songbirdnest.com/Songbird/Properties/UnitConverter/Storage;1"]
  129.         .createInstance(Ci.sbIPropertyUnitConverter);
  130.     var message = SBFormattedString
  131.                     (messageKeyPrefix + ".message",
  132.                      [ aDevice.name,
  133.                        storageConverter.autoFormat(aSpaceNeeded, -1, 1),
  134.                        storageConverter.autoFormat(aSpaceAvailable, -1, 1) ]);
  135.  
  136.     var buttonFlags = (Ci.nsIPromptService.BUTTON_POS_0 *
  137.                        Ci.nsIPromptService.BUTTON_TITLE_IS_STRING) +
  138.                       (Ci.nsIPromptService.BUTTON_POS_1 *
  139.                        Ci.nsIPromptService.BUTTON_TITLE_IS_STRING);
  140.     var prompter = Cc["@songbirdnest.com/Songbird/Prompter;1"]
  141.                      .getService(Ci.sbIPrompter);
  142.     var neverPromptAgain = { value: false };
  143.     var abortRequest = prompter.confirmEx
  144.                          (aParent,
  145.                           SBString(messageKeyPrefix + ".title"),
  146.                           message,
  147.                           buttonFlags,
  148.                           SBString(messageKeyPrefix + ".confirm_button"),
  149.                           SBString(messageKeyPrefix + ".cancel_button"),
  150.                           null,
  151.                           null,
  152.                           neverPromptAgain);
  153.  
  154.     return !abortRequest;
  155.   },
  156.  
  157.   _getMessageKeyPrefix:
  158.     function BaseDeviceHelper__getMessageKeyPrefix(aLibrary) {
  159.     var messageKeyPrefix = "device.error.not_enough_freespace.prompt.";
  160.     messageKeyPrefix += "manual";
  161.  
  162.     return messageKeyPrefix;
  163.   },
  164.  
  165.   contractID: "@songbirdnest.com/Songbird/Device/Base/Helper;1",
  166.   classDescription: "Helper component for device implementations",
  167.   classID: Components.ID("{ebe6e08a-0604-44fd-a3d7-2be556b96b24}"),
  168.   QueryInterface: XPCOMUtils.generateQI([
  169.     Components.interfaces.sbIDeviceHelper
  170.     ])
  171. };
  172.  
  173. NSGetModule = XPCOMUtils.generateNSGetModule([BaseDeviceHelper], null, null);
  174.