code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/Pithos.java

   1 /*
   2  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35 package gr.grnet.pithos.web.client;
  36
  37 import com.google.gwt.core.client.EntryPoint;
  38 import com.google.gwt.core.client.GWT;
  39 import com.google.gwt.core.client.JsArrayString;
  40 import com.google.gwt.core.client.Scheduler;
  41 import com.google.gwt.core.client.Scheduler.RepeatingCommand;
  42 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  43 import com.google.gwt.event.dom.client.ClickEvent;
  44 import com.google.gwt.event.dom.client.ClickHandler;
  45 import com.google.gwt.event.logical.shared.ResizeEvent;
  46 import com.google.gwt.event.logical.shared.ResizeHandler;
  47 import com.google.gwt.http.client.Response;
  48 import com.google.gwt.http.client.URL;
  49 import com.google.gwt.i18n.client.DateTimeFormat;
  50 import com.google.gwt.i18n.client.Dictionary;
  51 import com.google.gwt.i18n.client.TimeZone;
  52 import com.google.gwt.resources.client.ClientBundle;
  53 import com.google.gwt.resources.client.CssResource;
  54 import com.google.gwt.resources.client.ImageResource;
  55 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  56 import com.google.gwt.user.client.*;
  57 import com.google.gwt.user.client.ui.*;
  58 import com.google.gwt.view.client.SelectionChangeEvent;
  59 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  60 import com.google.gwt.view.client.SingleSelectionModel;
  61 import gr.grnet.pithos.web.client.catalog.UpdateUserCatalogs;
  62 import gr.grnet.pithos.web.client.catalog.UserCatalogs;
  63 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  64 import gr.grnet.pithos.web.client.foldertree.*;
  65 import gr.grnet.pithos.web.client.grouptree.Group;
  66 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  67 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  68 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  69 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  70 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  71 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  72 import gr.grnet.pithos.web.client.rest.*;
  73 import org.apache.http.HttpStatus;
  74
  75 import java.util.*;
  76
  77 /**
  78  * Entry point classes define <code>onModuleLoad()</code>.
  79  */
  80 public class Pithos implements EntryPoint, ResizeHandler {
  81
  82     public static final Configuration config = GWT.create(Configuration.class);
  83
  84     public interface Style extends CssResource {
  85         String commandAnchor();
  86
  87         String statistics();
  88
  89         @ClassName("gwt-HTML")
  90         String html();
  91
  92         String uploadAlert();
  93
  94         String uploadAlertLink();
  95
  96         String uploadAlertProgress();
  97
  98         String uploadAlertPercent();
  99
 100         String uploadAlertClose();
 101     }
 102
 103     public interface Resources extends ClientBundle {
 104         @Source("Pithos.css")
 105         Style pithosCss();
 106
 107         @Source("gr/grnet/pithos/resources/close-popup.png")
 108         ImageResource closePopup();
 109     }
 110
 111     public static Resources resources = GWT.create(Resources.class);
 112
 113     /**
 114      * Instantiate an application-level image bundle. This object will provide
 115      * programmatic access to all the images needed by widgets.
 116      */
 117     static Images images = (Images) GWT.create(Images.class);
 118
 119     public String getUserID() {
 120         return userID;
 121     }
 122
 123     public UserCatalogs getUserCatalogs() {
 124         return userCatalogs;
 125     }
 126
 127     public String getCurrentUserDisplayNameOrID() {
 128         final String displayName = userCatalogs.getDisplayName(getUserID());
 129         return displayName == null ? getUserID() : displayName;
 130     }
 131
 132     public boolean hasDisplayNameForUserID(String userID) {
 133         return userCatalogs.getDisplayName(userID) != null;
 134     }
 135
 136     public boolean hasIDForUserDisplayName(String userDisplayName) {
 137         return userCatalogs.getID(userDisplayName) != null;
 138     }
 139
 140     public String getDisplayNameForUserID(String userID) {
 141         return userCatalogs.getDisplayName(userID);
 142     }
 143
 144     public String getIDForUserDisplayName(String userDisplayName) {
 145         return userCatalogs.getID(userDisplayName);
 146     }
 147
 148     public List<String> getDisplayNamesForUserIDs(List<String> userIDs) {
 149         if(userIDs == null) {
 150             userIDs = new ArrayList<String>();
 151         }
 152         final List<String> userDisplayNames = new ArrayList<String>();
 153         for(String userID : userIDs) {
 154             final String displayName = getDisplayNameForUserID(userID);
 155             userDisplayNames.add(displayName);
 156         }
 157
 158         return userDisplayNames;
 159     }
 160
 161     public List<String> filterUserIDsWithUnknownDisplayName(Collection<String> userIDs) {
 162         if(userIDs == null) {
 163             userIDs = new ArrayList<String>();
 164         }
 165         final List<String> filtered = new ArrayList<String>();
 166         for(String userID : userIDs) {
 167             if(!this.userCatalogs.hasID(userID)) {
 168                 filtered.add(userID);
 169             }
 170         }
 171         return filtered;
 172     }
 173
 174     public void setAccount(AccountResource acct) {
 175         account = acct;
 176     }
 177
 178     public AccountResource getAccount() {
 179         return account;
 180     }
 181
 182     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 183         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 184     }
 185
 186     public void updateGroupNode(Group group) {
 187         groupTreeView.updateGroupNode(group);
 188     }
 189
 190     public void updateMySharedRoot() {
 191         mysharedTreeView.updateRoot();
 192     }
 193
 194     public void updateSharedFolder(Folder f, boolean showfiles, Command callback) {
 195         mysharedTreeView.updateFolder(f, showfiles, callback);
 196     }
 197
 198     public void updateSharedFolder(Folder f, boolean showfiles) {
 199         updateSharedFolder(f, showfiles, null);
 200     }
 201
 202     public void updateOtherSharedFolder(Folder f, boolean showfiles, Command callback) {
 203         otherSharedTreeView.updateFolder(f, showfiles, callback);
 204     }
 205
 206     public MysharedTreeView getMySharedTreeView() {
 207         return mysharedTreeView;
 208     }
 209
 210     /**
 211      * An aggregate image bundle that pulls together all the images for this
 212      * application into a single bundle.
 213      */
 214     public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 215
 216         @Source("gr/grnet/pithos/resources/document.png")
 217         ImageResource folders();
 218
 219         @Source("gr/grnet/pithos/resources/advancedsettings.png")
 220         @ImageOptions(width = 32, height = 32)
 221         ImageResource tools();
 222     }
 223
 224     private Throwable error;
 225
 226     /**
 227      * The Application Clipboard implementation;
 228      */
 229     private Clipboard clipboard = new Clipboard();
 230
 231     /**
 232      * The top panel that contains the menu bar.
 233      */
 234     private TopPanel topPanel;
 235
 236     /**
 237      * The panel that contains the various system messages.
 238      */
 239     private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 240
 241     /**
 242      * The bottom panel that contains the status bar.
 243      */
 244     StatusPanel statusPanel = null;
 245
 246     /**
 247      * The file list widget.
 248      */
 249     private FileList fileList;
 250
 251     /**
 252      * The tab panel that occupies the right side of the screen.
 253      */
 254     private VerticalPanel inner = new VerticalPanel();
 255
 256
 257     /**
 258      * The split panel that will contain the left and right panels.
 259      */
 260     private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 261
 262     /**
 263      * The currently selected item in the application, for use by the Edit menu
 264      * commands. Potential types are Folder, File, User and Group.
 265      */
 266     private Object currentSelection;
 267
 268     public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 269
 270     /**
 271      * The ID that uniquely identifies the user in Pithos+.
 272      * Currently this is a UUID. It used to be the user's email.
 273      */
 274     private String userID = null;
 275
 276     /**
 277      * Hold mappings from user UUIDs to emails and vice-versa.
 278      */
 279     private UserCatalogs userCatalogs = new UserCatalogs();
 280
 281     /**
 282      * The authentication token of the current user.
 283      */
 284     private String userToken;
 285
 286     VerticalPanel trees;
 287
 288     SingleSelectionModel<Folder> folderTreeSelectionModel;
 289     FolderTreeViewModel folderTreeViewModel;
 290     FolderTreeView folderTreeView;
 291
 292     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 293     MysharedTreeViewModel mysharedTreeViewModel;
 294     MysharedTreeView mysharedTreeView = null;
 295
 296     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 297     OtherSharedTreeViewModel otherSharedTreeViewModel;
 298     OtherSharedTreeView otherSharedTreeView = null;
 299
 300     GroupTreeViewModel groupTreeViewModel;
 301     GroupTreeView groupTreeView;
 302
 303     TreeView selectedTree;
 304     protected AccountResource account;
 305
 306     Folder trash;
 307
 308     List<Composite> treeViews = new ArrayList<Composite>();
 309
 310     @SuppressWarnings("rawtypes")
 311     List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 312
 313     public Button upload;
 314
 315     private HTML numOfFiles;
 316
 317     private Toolbar toolbar;
 318
 319     private FileUploadDialog fileUploadDialog = new FileUploadDialog(this);
 320
 321     UploadAlert uploadAlert;
 322
 323     Date lastModified;
 324
 325     @Override
 326     public void onModuleLoad() {
 327         if(parseUserCredentials()) {
 328             initialize();
 329         }
 330     }
 331
 332     static native void __ConsoleLog(String message) /*-{
 333       try {
 334         console.log(message);
 335       } catch (e) {
 336       }
 337     }-*/;
 338
 339     public static void LOG(Object ...args) {
 340         if(false) {
 341             final StringBuilder sb = new StringBuilder();
 342             for(Object arg : args) {
 343                 sb.append(arg);
 344             }
 345             if(sb.length() > 0) {
 346                 __ConsoleLog(sb.toString());
 347             }
 348         }
 349     }
 350
 351     private void initialize() {
 352         lastModified = new Date(); //Initialize if-modified-since value with now.
 353         resources.pithosCss().ensureInjected();
 354         boolean bareContent = Window.Location.getParameter("noframe") != null;
 355         String contentWidth = bareContent ? Const.PERCENT_100 : "75%";
 356
 357         VerticalPanel outer = new VerticalPanel();
 358         outer.setWidth(Const.PERCENT_100);
 359         if(!bareContent) {
 360             outer.addStyleName("pithos-outer");
 361         }
 362
 363         if(!bareContent) {
 364             topPanel = new TopPanel(this, Pithos.images);
 365             topPanel.setWidth(Const.PERCENT_100);
 366             outer.add(topPanel);
 367             outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 368         }
 369
 370         messagePanel.setVisible(false);
 371         outer.add(messagePanel);
 372         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 373         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 374
 375         HorizontalPanel header = new HorizontalPanel();
 376         header.addStyleName("pithos-header");
 377         header.setWidth(contentWidth);
 378         if(bareContent) {
 379             header.addStyleName("pithos-header-noframe");
 380         }
 381         upload = new Button("Upload", new ClickHandler() {
 382             @Override
 383             public void onClick(ClickEvent event) {
 384                 if(getSelection() != null) {
 385                     new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 386                 }
 387             }
 388         });
 389         upload.addStyleName("pithos-uploadButton");
 390         header.add(upload);
 391         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 392         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 393
 394         toolbar = new Toolbar(this);
 395         header.add(toolbar);
 396         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 397         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 398
 399         HorizontalPanel folderStatistics = new HorizontalPanel();
 400         folderStatistics.addStyleName("pithos-folderStatistics");
 401         numOfFiles = new HTML();
 402         folderStatistics.add(numOfFiles);
 403         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 404         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 405         folderStatistics.add(numOfFilesLabel);
 406         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 407         header.add(folderStatistics);
 408         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 409         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 410         header.setCellWidth(folderStatistics, "40px");
 411         outer.add(header);
 412         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 413         // Inner contains the various lists
 414         inner.sinkEvents(Event.ONCONTEXTMENU);
 415         inner.setWidth(Const.PERCENT_100);
 416
 417         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 418         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 419             @Override
 420             public void onSelectionChange(SelectionChangeEvent event) {
 421                 if(folderTreeSelectionModel.getSelectedObject() != null) {
 422                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 423                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 424                     Folder f = folderTreeSelectionModel.getSelectedObject();
 425                     updateFolder(f, true, new Command() {
 426
 427                         @Override
 428                         public void execute() {
 429                             updateStatistics();
 430                         }
 431                     }, true);
 432                     showRelevantToolbarButtons();
 433                 }
 434                 else {
 435                     if(getSelectedTree().equals(folderTreeView)) {
 436                         setSelectedTree(null);
 437                     }
 438                     if(getSelectedTree() == null) {
 439                         showRelevantToolbarButtons();
 440                     }
 441                 }
 442             }
 443         });
 444         selectionModels.add(folderTreeSelectionModel);
 445
 446         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 447         folderTreeView = new FolderTreeView(folderTreeViewModel);
 448         treeViews.add(folderTreeView);
 449
 450         fileList = new FileList(this, images);
 451         inner.add(fileList);
 452
 453         trees = new VerticalPanel();
 454         trees.setWidth(Const.PERCENT_100);
 455
 456         // Add the left and right panels to the split panel.
 457         splitPanel.setLeftWidget(trees);
 458         FlowPanel right = new FlowPanel();
 459         right.getElement().setId("rightPanel");
 460         right.add(inner);
 461         splitPanel.setRightWidget(right);
 462         splitPanel.setSplitPosition("219px");
 463         splitPanel.setSize(Const.PERCENT_100, Const.PERCENT_100);
 464         splitPanel.addStyleName("pithos-splitPanel");
 465         splitPanel.setWidth(contentWidth);
 466         outer.add(splitPanel);
 467         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 468
 469         if(!bareContent) {
 470             statusPanel = new StatusPanel();
 471             statusPanel.setWidth(Const.PERCENT_100);
 472             outer.add(statusPanel);
 473             outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 474         }
 475         else {
 476             splitPanel.addStyleName("pithos-splitPanel-noframe");
 477         }
 478
 479         // Hook the window resize event, so that we can adjust the UI.
 480         Window.addResizeHandler(this);
 481         // Clear out the window's built-in margin, because we want to take
 482         // advantage of the entire client area.
 483         Window.setMargin("0px");
 484         // Finally, add the outer panel to the RootPanel, so that it will be
 485         // displayed.
 486         RootPanel.get().add(outer);
 487         // Call the window resized handler to get the initial sizes setup. Doing
 488         // this in a deferred command causes it to occur after all widgets'
 489         // sizes have been computed by the browser.
 490         Scheduler.get().scheduleIncremental(new RepeatingCommand() {
 491
 492             @Override
 493             public boolean execute() {
 494                 if(!isCloudbarReady()) {
 495                     return true;
 496                 }
 497                 onWindowResized(Window.getClientHeight());
 498                 return false;
 499             }
 500         });
 501
 502         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 503             @Override
 504             public void execute() {
 505                 LOG("Pithos::initialize() Calling Pithos::fetchAccount()");
 506                 fetchAccount(new Command() {
 507
 508                     @Override
 509                     public void execute() {
 510                         if(!account.hasHomeContainer()) {
 511                             createHomeContainer(account, this);
 512                         }
 513                         else if(!account.hasTrashContainer()) {
 514                             createTrashContainer(this);
 515                         }
 516                         else {
 517                             for(Folder f : account.getContainers()) {
 518                                 if(f.getName().equals(Const.TRASH_CONTAINER)) {
 519                                     trash = f;
 520                                     break;
 521                                 }
 522                             }
 523                             trees.add(folderTreeView);
 524                             folderTreeViewModel.initialize(account, new Command() {
 525
 526                                 @Override
 527                                 public void execute() {
 528                                     createMySharedTree();
 529                                 }
 530                             });
 531
 532                             HorizontalPanel separator = new HorizontalPanel();
 533                             separator.addStyleName("pithos-statisticsSeparator");
 534                             separator.add(new HTML(""));
 535                             trees.add(separator);
 536
 537                             groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 538                             groupTreeView = new GroupTreeView(groupTreeViewModel);
 539                             treeViews.add(groupTreeView);
 540                             trees.add(groupTreeView);
 541                             folderTreeView.showStatistics(account);
 542                         }
 543                     }
 544                 });
 545             }
 546         });
 547     }
 548
 549     public void scheduleResfresh() {
 550         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 551
 552             @Override
 553             public boolean execute() {
 554                 final Folder f = getSelection();
 555                 if(f == null) {
 556                     return true;
 557                 }
 558
 559                 HeadRequest<Folder> head = new HeadRequest<Folder>(Folder.class, getApiPath(), f.getOwnerID(), "/" + f.getContainer()) {
 560
 561                     @Override
 562                     public void onSuccess(Folder _result) {
 563                         lastModified = new Date();
 564                         if(getSelectedTree().equals(folderTreeView)) {
 565                             updateFolder(f, true, new Command() {
 566
 567                                 @Override
 568                                 public void execute() {
 569                                     scheduleResfresh();
 570                                 }
 571
 572                             }, false);
 573                         }
 574                         else if(getSelectedTree().equals(mysharedTreeView)) {
 575                             updateSharedFolder(f, true, new Command() {
 576
 577                                 @Override
 578                                 public void execute() {
 579                                     scheduleResfresh();
 580                                 }
 581                             });
 582                         }
 583                         else {
 584                             scheduleResfresh();
 585                         }
 586                     }
 587
 588                     @Override
 589                     public void onError(Throwable t) {
 590                         if(t instanceof RestException && ((RestException) t).getHttpStatusCode() == HttpStatus.SC_NOT_MODIFIED) {
 591                             scheduleResfresh();
 592                         }
 593                         else if(retries >= MAX_RETRIES) {
 594                             GWT.log("Error heading folder", t);
 595                             setError(t);
 596                             if(t instanceof RestException) {
 597                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
 598                             }
 599                             else {
 600                                 displayError("System error heading folder: " + t.getMessage());
 601                             }
 602                         }
 603                         else {//retry
 604                             GWT.log("Retry " + retries);
 605                             Scheduler.get().scheduleDeferred(this);
 606                         }
 607                     }
 608
 609                     @Override
 610                     protected void onUnauthorized(Response response) {
 611                         if(retries >= MAX_RETRIES) {
 612                             sessionExpired();
 613                         }
 614                         else //retry
 615                         {
 616                             Scheduler.get().scheduleDeferred(this);
 617                         }
 618                     }
 619                 };
 620                 head.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 621                 head.setHeader(Const.IF_MODIFIED_SINCE, DateTimeFormat.getFormat(Const.DATE_FORMAT_1).format(lastModified, TimeZone.createTimeZone(0)) + " GMT");
 622                 Scheduler.get().scheduleDeferred(head);
 623
 624                 return false;
 625             }
 626         }, 3000);
 627     }
 628
 629     public void applyPermissions(Folder f) {
 630         if(f != null) {
 631             if(f.isInTrash()) {
 632                 upload.setEnabled(false);
 633                 disableUploadArea();
 634             }
 635             else {
 636                 Boolean[] perms = f.getPermissions().get(userID);
 637                 if(f.getOwnerID().equals(userID) || (perms != null && perms[1] != null && perms[1])) {
 638                     upload.setEnabled(true);
 639                     enableUploadArea();
 640                 }
 641                 else {
 642                     upload.setEnabled(false);
 643                     disableUploadArea();
 644                 }
 645             }
 646         }
 647         else {
 648             upload.setEnabled(false);
 649             disableUploadArea();
 650         }
 651     }
 652
 653     @SuppressWarnings({"rawtypes", "unchecked"})
 654     public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 655         selectedTree = _selectedTree;
 656
 657         for(SingleSelectionModel s : selectionModels) {
 658             if(!s.equals(model) && s.getSelectedObject() != null) {
 659                 s.setSelected(s.getSelectedObject(), false);
 660             }
 661         }
 662     }
 663
 664     public void showFiles(final Folder f) {
 665         Set<File> files = f.getFiles();
 666         showFiles(files);
 667     }
 668
 669     public void showFiles(Set<File> files) {
 670         fileList.setFiles(new ArrayList<File>(files));
 671     }
 672
 673     /**
 674      * Parse and store the user credentials to the appropriate fields.
 675      */
 676     private boolean parseUserCredentials() {
 677         Configuration conf = (Configuration) GWT.create(Configuration.class);
 678         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 679         String cookie = otherProperties.get(Const.AUTH_COOKIE);
 680         String auth = Cookies.getCookie(cookie);
 681         if(auth == null) {
 682             authenticateUser();
 683             return false;
 684         }
 685         if(auth.startsWith("\"")) {
 686             auth = auth.substring(1);
 687         }
 688         if(auth.endsWith("\"")) {
 689             auth = auth.substring(0, auth.length() - 1);
 690         }
 691         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 692         if(authSplit.length != 2) {
 693             authenticateUser();
 694             return false;
 695         }
 696         userID = authSplit[0];
 697         userToken = authSplit[1];
 698
 699         String gotoUrl = Window.Location.getParameter("goto");
 700         if(gotoUrl != null && gotoUrl.length() > 0) {
 701             Window.Location.assign(gotoUrl);
 702             return false;
 703         }
 704         return true;
 705     }
 706
 707     /**
 708      * Redirect the user to the login page for authentication.
 709      */
 710     protected void authenticateUser() {
 711         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 712         Window.Location.assign(otherProperties.get(Const.LOGIN_URL) + Window.Location.getHref());
 713     }
 714
 715     public void fetchAccount(final Command callback) {
 716         String path = "?format=json";
 717
 718         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), userID, path) {
 719             @Override
 720             public void onSuccess(AccountResource accountResource) {
 721                 account = accountResource;
 722                 if(callback != null) {
 723                     callback.execute();
 724                 }
 725
 726                 final List<String> memberIDs = new ArrayList<String>();
 727                 final List<Group> groups = account.getGroups();
 728                 for(Group group : groups) {
 729 //                    LOG("Group ", group);
 730                     for(String member: group.getMemberIDs()) {
 731 //                        LOG("      ", member);
 732                         memberIDs.add(member);
 733                     }
 734                 }
 735
 736                 final List<String> theUnknown = Pithos.this.filterUserIDsWithUnknownDisplayName(memberIDs);
 737                 // Initialize the user catalog
 738                 new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleEntry();
 739                 LOG("Called new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();");
 740             }
 741
 742             @Override
 743             public void onError(Throwable t) {
 744                 GWT.log("Error getting account", t);
 745                 setError(t);
 746                 if(t instanceof RestException) {
 747                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 748                 }
 749                 else {
 750                     displayError("System error fetching user data: " + t.getMessage());
 751                 }
 752             }
 753
 754             @Override
 755             protected void onUnauthorized(Response response) {
 756                 sessionExpired();
 757             }
 758         };
 759         getAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 760         Scheduler.get().scheduleDeferred(getAccount);
 761     }
 762
 763     public void updateStatistics() {
 764         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), userID, "", account) {
 765
 766             @Override
 767             public void onSuccess(AccountResource _result) {
 768                 folderTreeView.showStatistics(account);
 769             }
 770
 771             @Override
 772             public void onError(Throwable t) {
 773                 GWT.log("Error getting account", t);
 774                 setError(t);
 775                 if(t instanceof RestException) {
 776                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 777                 }
 778                 else {
 779                     displayError("System error fetching user data: " + t.getMessage());
 780                 }
 781             }
 782
 783             @Override
 784             protected void onUnauthorized(Response response) {
 785                 sessionExpired();
 786             }
 787         };
 788         headAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 789         Scheduler.get().scheduleDeferred(headAccount);
 790     }
 791
 792     protected void createHomeContainer(final AccountResource _account, final Command callback) {
 793         String path = "/" + Const.HOME_CONTAINER;
 794         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 795             @Override
 796             public void onSuccess(Resource result) {
 797                 if(!_account.hasTrashContainer()) {
 798                     createTrashContainer(callback);
 799                 }
 800                 else {
 801                     fetchAccount(callback);
 802                 }
 803             }
 804
 805             @Override
 806             public void onError(Throwable t) {
 807                 GWT.log("Error creating pithos", t);
 808                 setError(t);
 809                 if(t instanceof RestException) {
 810                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 811                 }
 812                 else {
 813                     displayError("System error Error creating pithos: " + t.getMessage());
 814                 }
 815             }
 816
 817             @Override
 818             protected void onUnauthorized(Response response) {
 819                 sessionExpired();
 820             }
 821         };
 822         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 823         Scheduler.get().scheduleDeferred(createPithos);
 824     }
 825
 826     protected void createTrashContainer(final Command callback) {
 827         String path = "/" + Const.TRASH_CONTAINER;
 828         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 829             @Override
 830             public void onSuccess(Resource result) {
 831                 fetchAccount(callback);
 832             }
 833
 834             @Override
 835             public void onError(Throwable t) {
 836                 GWT.log("Error creating pithos", t);
 837                 setError(t);
 838                 if(t instanceof RestException) {
 839                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 840                 }
 841                 else {
 842                     displayError("System error Error creating pithos: " + t.getMessage());
 843                 }
 844             }
 845
 846             @Override
 847             protected void onUnauthorized(Response response) {
 848                 sessionExpired();
 849             }
 850         };
 851         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 852         Scheduler.get().scheduleDeferred(createPithos);
 853     }
 854
 855     /**
 856      * Creates an HTML fragment that places an image & caption together, for use
 857      * in a group header.
 858      *
 859      * @param imageProto an image prototype for an image
 860      * @param caption    the group caption
 861      * @return the header HTML fragment
 862      */
 863     private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 864         String captionHTML = "<table class='caption' cellpadding='0' "
 865             + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 866             + "</td><td id =" + caption + " class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 867             + caption + "</b></td></tr></table>";
 868         return captionHTML;
 869     }
 870
 871     protected void onWindowResized(int height) {
 872         // Adjust the split panel to take up the available room in the window.
 873         int newHeight = height - splitPanel.getAbsoluteTop() - 153;
 874         if(newHeight < 1) {
 875             newHeight = 1;
 876         }
 877         splitPanel.setHeight("" + newHeight);
 878         inner.setHeight("" + newHeight);
 879     }
 880
 881     native boolean isCloudbarReady()/*-{
 882       if ($wnd.$("div.cloudbar") && $wnd.$("div.cloudbar").height() > 0)
 883         return true;
 884       return false;
 885     }-*/;
 886
 887     @Override
 888     public void onResize(ResizeEvent event) {
 889         int height = event.getHeight();
 890         onWindowResized(height);
 891     }
 892
 893     /**
 894      * Display an error message.
 895      *
 896      * @param msg the message to display
 897      */
 898     public void displayError(String msg) {
 899         messagePanel.displayError(msg);
 900         onWindowResized(Window.getClientHeight());
 901     }
 902
 903     /**
 904      * Display a warning message.
 905      *
 906      * @param msg the message to display
 907      */
 908     public void displayWarning(String msg) {
 909         messagePanel.displayWarning(msg);
 910         onWindowResized(Window.getClientHeight());
 911     }
 912
 913     /**
 914      * Display an informational message.
 915      *
 916      * @param msg the message to display
 917      */
 918     public void displayInformation(String msg) {
 919         messagePanel.displayInformation(msg);
 920         onWindowResized(Window.getClientHeight());
 921     }
 922
 923     /**
 924      * Retrieve the fileList.
 925      *
 926      * @return the fileList
 927      */
 928     public FileList getFileList() {
 929         return fileList;
 930     }
 931
 932     /**
 933      * Retrieve the topPanel.
 934      *
 935      * @return the topPanel
 936      */
 937     TopPanel getTopPanel() {
 938         return topPanel;
 939     }
 940
 941     /**
 942      * Retrieve the clipboard.
 943      *
 944      * @return the clipboard
 945      */
 946     public Clipboard getClipboard() {
 947         return clipboard;
 948     }
 949
 950     public StatusPanel getStatusPanel() {
 951         return statusPanel;
 952     }
 953
 954     public String getUserToken() {
 955         return userToken;
 956     }
 957
 958     public static native void preventIESelection() /*-{
 959       $doc.body.onselectstart = function () {
 960         return false;
 961       };
 962     }-*/;
 963
 964     public static native void enableIESelection() /*-{
 965       if ($doc.body.onselectstart != null)
 966         $doc.body.onselectstart = null;
 967     }-*/;
 968
 969     /**
 970      * @return the absolute path of the API root URL
 971      */
 972     public String getApiPath() {
 973         Configuration conf = (Configuration) GWT.create(Configuration.class);
 974         return conf.apiPath();
 975     }
 976
 977     /**
 978      * History support for folder navigation
 979      * adds a new browser history entry
 980      *
 981      * @param key
 982      */
 983     public void updateHistory(String key) {
 984 //              Replace any whitespace of the initial string to "+"
 985 //              String result = key.replaceAll("\\s","+");
 986 //              Add a new browser history entry.
 987 //              History.newItem(result);
 988         History.newItem(key);
 989     }
 990
 991     public void deleteFolder(final Folder folder, final Command callback) {
 992         final PleaseWaitPopup pwp = new PleaseWaitPopup();
 993         pwp.center();
 994         String path = "/" + folder.getContainer() + "/" + folder.getPrefix() + "?delimiter=/" + "&t=" + System.currentTimeMillis();
 995         DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), folder.getOwnerID(), path) {
 996
 997             @Override
 998             protected void onUnauthorized(Response response) {
 999                 pwp.hide();
1000                 sessionExpired();
1001             }
1002
1003             @Override
1004             public void onSuccess(Resource result) {
1005                 updateFolder(folder.getParent(), true, new Command() {
1006
1007                     @Override
1008                     public void execute() {
1009                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
1010                         updateStatistics();
1011                         if(callback != null) {
1012                             callback.execute();
1013                         }
1014                         pwp.hide();
1015                     }
1016                 }, true);
1017             }
1018
1019             @Override
1020             public void onError(Throwable t) {
1021                 GWT.log("", t);
1022                 setError(t);
1023                 if(t instanceof RestException) {
1024                     if(((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND) {
1025                         displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());
1026                     }
1027                     else {
1028                         onSuccess(null);
1029                     }
1030                 }
1031                 else {
1032                     displayError("System error unable to delete folder: " + t.getMessage());
1033                 }
1034                 pwp.hide();
1035             }
1036         };
1037         deleteFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1038         Scheduler.get().scheduleDeferred(deleteFolder);
1039     }
1040
1041     public FolderTreeView getFolderTreeView() {
1042         return folderTreeView;
1043     }
1044
1045     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
1046         if(iter.hasNext()) {
1047             File file = iter.next();
1048             String path = targetUri + "/" + file.getName();
1049             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
1050                 @Override
1051                 public void onSuccess(Resource result) {
1052                     copyFiles(iter, targetUsername, targetUri, callback);
1053                 }
1054
1055                 @Override
1056                 public void onError(Throwable t) {
1057                     GWT.log("", t);
1058                     setError(t);
1059                     if(t instanceof RestException) {
1060                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
1061                     }
1062                     else {
1063                         displayError("System error unable to copy file: " + t.getMessage());
1064                     }
1065                 }
1066
1067                 @Override
1068                 protected void onUnauthorized(Response response) {
1069                     sessionExpired();
1070                 }
1071             };
1072             copyFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1073             copyFile.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(file.getUri()));
1074             if(!file.getOwnerID().equals(targetUsername)) {
1075                 copyFile.setHeader(Const.X_SOURCE_ACCOUNT, URL.encodePathSegment(file.getOwnerID()));
1076             }
1077             copyFile.setHeader(Const.CONTENT_TYPE, file.getContentType());
1078             Scheduler.get().scheduleDeferred(copyFile);
1079         }
1080         else if(callback != null) {
1081             callback.execute();
1082         }
1083     }
1084
1085     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, boolean move, final Command callback) {
1086         String path = targetUri + "?delimiter=/";
1087         PutRequest copyFolder = new PutRequest(getApiPath(), targetUsername, path) {
1088             @Override
1089             public void onSuccess(Resource result) {
1090                 if(callback != null) {
1091                     callback.execute();
1092                 }
1093             }
1094
1095             @Override
1096             public void onError(Throwable t) {
1097                 GWT.log("", t);
1098                 setError(t);
1099                 if(t instanceof RestException) {
1100                     displayError("Unable to copy folder: " + ((RestException) t).getHttpStatusText());
1101                 }
1102                 else {
1103                     displayError("System error copying folder: " + t.getMessage());
1104                 }
1105             }
1106
1107             @Override
1108             protected void onUnauthorized(Response response) {
1109                 sessionExpired();
1110             }
1111         };
1112         copyFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1113         copyFolder.setHeader(Const.ACCEPT, "*/*");
1114         copyFolder.setHeader(Const.CONTENT_LENGTH, "0");
1115         copyFolder.setHeader(Const.CONTENT_TYPE, "application/directory");
1116         if(!f.getOwnerID().equals(targetUsername)) {
1117             copyFolder.setHeader(Const.X_SOURCE_ACCOUNT, f.getOwnerID());
1118         }
1119         if(move) {
1120             copyFolder.setHeader(Const.X_MOVE_FROM, URL.encodePathSegment(f.getUri()));
1121         }
1122         else {
1123             copyFolder.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(f.getUri()));
1124         }
1125         Scheduler.get().scheduleDeferred(copyFolder);
1126     }
1127
1128     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1129         selectionModels.add(model);
1130     }
1131
1132     public OtherSharedTreeView getOtherSharedTreeView() {
1133         return otherSharedTreeView;
1134     }
1135
1136     public void updateTrash(boolean showFiles, Command callback) {
1137         updateFolder(trash, showFiles, callback, true);
1138     }
1139
1140     public void updateGroupsNode() {
1141         groupTreeView.updateGroupNode(null);
1142     }
1143
1144     public Group addGroup(String groupname) {
1145         Group newGroup = new Group(groupname);
1146         account.addGroup(newGroup);
1147         groupTreeView.updateGroupNode(null);
1148         return newGroup;
1149     }
1150
1151     public void removeGroup(Group group) {
1152         account.removeGroup(group);
1153         updateGroupsNode();
1154     }
1155
1156     public TreeView getSelectedTree() {
1157         return selectedTree;
1158     }
1159
1160     public void setSelectedTree(TreeView selected) {
1161         selectedTree = selected;
1162     }
1163
1164     public Folder getSelection() {
1165         if(selectedTree != null) {
1166             return selectedTree.getSelection();
1167         }
1168         return null;
1169     }
1170
1171     public void showFolderStatistics(int folderFileCount) {
1172         numOfFiles.setHTML(String.valueOf(folderFileCount));
1173     }
1174
1175     public GroupTreeView getGroupTreeView() {
1176         return groupTreeView;
1177     }
1178
1179     public void sessionExpired() {
1180         new SessionExpiredDialog(this).center();
1181     }
1182
1183     public void updateRootFolder(Command callback) {
1184         updateFolder(account.getPithos(), false, callback, true);
1185     }
1186
1187     void createMySharedTree() {
1188         LOG("Pithos::createMySharedTree()");
1189         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1190         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1191             @Override
1192             public void onSelectionChange(SelectionChangeEvent event) {
1193                 if(mysharedTreeSelectionModel.getSelectedObject() != null) {
1194                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1195                     upload.setEnabled(false);
1196                     disableUploadArea();
1197                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1198                     showRelevantToolbarButtons();
1199                 }
1200                 else {
1201                     if(getSelectedTree().equals(mysharedTreeView)) {
1202                         setSelectedTree(null);
1203                     }
1204                     if(getSelectedTree() == null) {
1205                         showRelevantToolbarButtons();
1206                     }
1207                 }
1208             }
1209         });
1210         selectionModels.add(mysharedTreeSelectionModel);
1211         mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1212         mysharedTreeViewModel.initialize(new Command() {
1213
1214             @Override
1215             public void execute() {
1216                 mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1217                 trees.insert(mysharedTreeView, 2);
1218                 treeViews.add(mysharedTreeView);
1219                 createOtherSharedTree();
1220             }
1221         });
1222     }
1223
1224     void createOtherSharedTree() {
1225         LOG("Pithos::createOtherSharedTree()");
1226         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1227         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1228             @Override
1229             public void onSelectionChange(SelectionChangeEvent event) {
1230                 if(otherSharedTreeSelectionModel.getSelectedObject() != null) {
1231                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1232                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1233                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true, null);
1234                     showRelevantToolbarButtons();
1235                 }
1236                 else {
1237                     if(getSelectedTree().equals(otherSharedTreeView)) {
1238                         setSelectedTree(null);
1239                     }
1240                     if(getSelectedTree() == null) {
1241                         showRelevantToolbarButtons();
1242                     }
1243                 }
1244             }
1245         });
1246         selectionModels.add(otherSharedTreeSelectionModel);
1247         otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1248         LOG("Pithos::createOtherSharedTree(), initializing otherSharedTreeViewModel with a callback");
1249         otherSharedTreeViewModel.initialize(new Command() {
1250             @Override
1251             public void execute() {
1252                 otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1253                 trees.insert(otherSharedTreeView, 1);
1254                 treeViews.add(otherSharedTreeView);
1255                 scheduleResfresh();
1256             }
1257         });
1258     }
1259
1260     public String getErrorData() {
1261         final StringBuilder sb = new StringBuilder();
1262         final String NL = Const.NL;
1263         Throwable t = this.error;
1264         while(t != null) {
1265             sb.append(t.toString());
1266             sb.append(NL);
1267             StackTraceElement[] traces = t.getStackTrace();
1268             for(StackTraceElement trace : traces) {
1269                 sb.append("  [");
1270                 sb.append(trace.getClassName());
1271                 sb.append("::");
1272                 sb.append(trace.getMethodName());
1273                 sb.append("() at ");
1274                 sb.append(trace.getFileName());
1275                 sb.append(":");
1276                 sb.append(trace.getLineNumber());
1277                 sb.append("]");
1278                 sb.append(NL);
1279             }
1280             t = t.getCause();
1281         }
1282
1283         return sb.toString();
1284     }
1285
1286     public void setError(Throwable t) {
1287         error = t;
1288     }
1289
1290     public void showRelevantToolbarButtons() {
1291         toolbar.showRelevantButtons();
1292     }
1293
1294     public FileUploadDialog getFileUploadDialog() {
1295         if(fileUploadDialog == null) {
1296             fileUploadDialog = new FileUploadDialog(this);
1297         }
1298         return fileUploadDialog;
1299     }
1300
1301     public void hideUploadIndicator() {
1302         upload.removeStyleName("pithos-uploadButton-loading");
1303         upload.setTitle("");
1304     }
1305
1306     public void showUploadIndicator() {
1307         upload.addStyleName("pithos-uploadButton-loading");
1308         upload.setTitle("Upload in progress. Click for details.");
1309     }
1310
1311     public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1312         if(folder == null) {
1313             if(callback != null) {
1314                 callback.execute();
1315             }
1316         }
1317         else {
1318             HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwnerID(), folder.getUri(), folder) {
1319
1320                 @Override
1321                 public void onSuccess(Folder _result) {
1322                     if(callback != null) {
1323                         callback.execute();
1324                     }
1325                 }
1326
1327                 @Override
1328                 public void onError(Throwable t) {
1329                     if(t instanceof RestException) {
1330                         if(((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1331                             final String path = folder.getUri();
1332                             PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwnerID(), path) {
1333                                 @Override
1334                                 public void onSuccess(Resource _result) {
1335                                     scheduleFolderHeadCommand(folder, callback);
1336                                 }
1337
1338                                 @Override
1339                                 public void onError(Throwable _t) {
1340                                     GWT.log("", _t);
1341                                     setError(_t);
1342                                     if(_t instanceof RestException) {
1343                                         displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1344                                     }
1345                                     else {
1346                                         displayError("System error creating folder: " + _t.getMessage());
1347                                     }
1348                                 }
1349
1350                                 @Override
1351                                 protected void onUnauthorized(Response response) {
1352                                     sessionExpired();
1353                                 }
1354                             };
1355                             newFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1356                             newFolder.setHeader(Const.CONTENT_TYPE, "application/folder");
1357                             newFolder.setHeader(Const.ACCEPT, "*/*");
1358                             newFolder.setHeader(Const.CONTENT_LENGTH, "0");
1359                             Scheduler.get().scheduleDeferred(newFolder);
1360                         }
1361                         else if(((RestException) t).getHttpStatusCode() == Response.SC_FORBIDDEN) {
1362                             onSuccess(folder);
1363                         }
1364                         else {
1365                             displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1366                         }
1367                     }
1368                     else {
1369                         displayError("System error heading folder: " + t.getMessage());
1370                     }
1371
1372                     GWT.log("Error heading folder", t);
1373                     setError(t);
1374                 }
1375
1376                 @Override
1377                 protected void onUnauthorized(Response response) {
1378                     sessionExpired();
1379                 }
1380             };
1381             headFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1382             Scheduler.get().scheduleDeferred(headFolder);
1383         }
1384     }
1385
1386     public void scheduleFileHeadCommand(File f, final Command callback) {
1387         HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwnerID(), f.getUri(), f) {
1388
1389             @Override
1390             public void onSuccess(File _result) {
1391                 if(callback != null) {
1392                     callback.execute();
1393                 }
1394             }
1395
1396             @Override
1397             public void onError(Throwable t) {
1398                 GWT.log("Error heading file", t);
1399                 setError(t);
1400                 if(t instanceof RestException) {
1401                     displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1402                 }
1403                 else {
1404                     displayError("System error heading file: " + t.getMessage());
1405                 }
1406             }
1407
1408             @Override
1409             protected void onUnauthorized(Response response) {
1410                 sessionExpired();
1411             }
1412         };
1413         headFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1414         Scheduler.get().scheduleDeferred(headFile);
1415     }
1416
1417     public boolean isMySharedSelected() {
1418         return getSelectedTree().equals(getMySharedTreeView());
1419     }
1420
1421     private Folder getUploadFolder() {
1422         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1423             return getSelection();
1424         }
1425         return null;
1426     }
1427
1428     private void updateUploadFolder() {
1429         updateUploadFolder(null);
1430     }
1431
1432     private void updateUploadFolder(final JsArrayString urls) {
1433         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1434             Folder f = getSelection();
1435             if(getSelectedTree().equals(getFolderTreeView())) {
1436                 updateFolder(f, true, new Command() {
1437
1438                     @Override
1439                     public void execute() {
1440                         updateStatistics();
1441                         if(urls != null) {
1442                             selectUploadedFiles(urls);
1443                         }
1444                     }
1445                 }, false);
1446             }
1447             else {
1448                 updateOtherSharedFolder(f, true, null);
1449             }
1450         }
1451     }
1452
1453     public native void disableUploadArea() /*-{
1454       var uploader = $wnd.$("#uploader").pluploadQueue();
1455       var dropElm = $wnd.document.getElementById('rightPanel');
1456       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1457     }-*/;
1458
1459     public native void enableUploadArea() /*-{
1460       var uploader = $wnd.$("#uploader").pluploadQueue();
1461       var dropElm = $wnd.document.getElementById('rightPanel');
1462       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1463       if (uploader.runtime == 'html5') {
1464         uploader.settings.drop_element = 'rightPanel';
1465         uploader.trigger('PostInit');
1466       }
1467     }-*/;
1468
1469     public void showUploadAlert(int nOfFiles) {
1470         if(uploadAlert == null) {
1471             uploadAlert = new UploadAlert(this, nOfFiles);
1472         }
1473         if(!uploadAlert.isShowing()) {
1474             uploadAlert.setPopupPositionAndShow(new PopupPanel.PositionCallback() {
1475
1476                 @Override
1477                 public void setPosition(int offsetWidth, int offsetHeight) {
1478                     uploadAlert.setPopupPosition((Window.getClientWidth() - offsetWidth) / 2, statusPanel.getAbsoluteTop() - offsetHeight);
1479                 }
1480             });
1481         }
1482         uploadAlert.setNumOfFiles(nOfFiles);
1483     }
1484
1485     public void hideUploadAlert() {
1486         if(uploadAlert != null && uploadAlert.isShowing()) {
1487             uploadAlert.hide();
1488         }
1489     }
1490
1491     public void selectUploadedFiles(JsArrayString urls) {
1492         List<String> selectedUrls = new ArrayList<String>();
1493         for(int i = 0; i < urls.length(); i++) {
1494             selectedUrls.add(urls.get(i));
1495         }
1496         fileList.selectByUrl(selectedUrls);
1497     }
1498
1499     public void emptyContainer(final Folder container) {
1500         String path = "/" + container.getName() + "?delimiter=/";
1501         DeleteRequest delete = new DeleteRequest(getApiPath(), getUserID(), path) {
1502
1503             @Override
1504             protected void onUnauthorized(Response response) {
1505                 sessionExpired();
1506             }
1507
1508             @Override
1509             public void onSuccess(Resource result) {
1510                 updateFolder(container, true, null, true);
1511             }
1512
1513             @Override
1514             public void onError(Throwable t) {
1515                 GWT.log("Error deleting trash", t);
1516                 setError(t);
1517                 if(t instanceof RestException) {
1518                     displayError("Error deleting trash: " + ((RestException) t).getHttpStatusText());
1519                 }
1520                 else {
1521                     displayError("System error deleting trash: " + t.getMessage());
1522                 }
1523             }
1524         };
1525         delete.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1526         Scheduler.get().scheduleDeferred(delete);
1527     }
1528 }