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

   1 /*
   2  * Copyright 2011-2013 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                     memberIDs.addAll(group.getMemberIDs());
 730                 }
 731                 memberIDs.add(Pithos.this.getUserID());
 732
 733                 final List<String> theUnknown = Pithos.this.filterUserIDsWithUnknownDisplayName(memberIDs);
 734                 // Initialize the user catalog
 735                 new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();
 736                 LOG("Called new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();");
 737             }
 738
 739             @Override
 740             public void onError(Throwable t) {
 741                 GWT.log("Error getting account", t);
 742                 setError(t);
 743                 if(t instanceof RestException) {
 744                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 745                 }
 746                 else {
 747                     displayError("System error fetching user data: " + t.getMessage());
 748                 }
 749             }
 750
 751             @Override
 752             protected void onUnauthorized(Response response) {
 753                 sessionExpired();
 754             }
 755         };
 756         getAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 757         Scheduler.get().scheduleDeferred(getAccount);
 758     }
 759
 760     public void updateStatistics() {
 761         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), userID, "", account) {
 762
 763             @Override
 764             public void onSuccess(AccountResource _result) {
 765                 folderTreeView.showStatistics(account);
 766             }
 767
 768             @Override
 769             public void onError(Throwable t) {
 770                 GWT.log("Error getting account", t);
 771                 setError(t);
 772                 if(t instanceof RestException) {
 773                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 774                 }
 775                 else {
 776                     displayError("System error fetching user data: " + t.getMessage());
 777                 }
 778             }
 779
 780             @Override
 781             protected void onUnauthorized(Response response) {
 782                 sessionExpired();
 783             }
 784         };
 785         headAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 786         Scheduler.get().scheduleDeferred(headAccount);
 787     }
 788
 789     protected void createHomeContainer(final AccountResource _account, final Command callback) {
 790         String path = "/" + Const.HOME_CONTAINER;
 791         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 792             @Override
 793             public void onSuccess(Resource result) {
 794                 if(!_account.hasTrashContainer()) {
 795                     createTrashContainer(callback);
 796                 }
 797                 else {
 798                     fetchAccount(callback);
 799                 }
 800             }
 801
 802             @Override
 803             public void onError(Throwable t) {
 804                 GWT.log("Error creating pithos", t);
 805                 setError(t);
 806                 if(t instanceof RestException) {
 807                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 808                 }
 809                 else {
 810                     displayError("System error Error creating pithos: " + t.getMessage());
 811                 }
 812             }
 813
 814             @Override
 815             protected void onUnauthorized(Response response) {
 816                 sessionExpired();
 817             }
 818         };
 819         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 820         Scheduler.get().scheduleDeferred(createPithos);
 821     }
 822
 823     protected void createTrashContainer(final Command callback) {
 824         String path = "/" + Const.TRASH_CONTAINER;
 825         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 826             @Override
 827             public void onSuccess(Resource result) {
 828                 fetchAccount(callback);
 829             }
 830
 831             @Override
 832             public void onError(Throwable t) {
 833                 GWT.log("Error creating pithos", t);
 834                 setError(t);
 835                 if(t instanceof RestException) {
 836                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 837                 }
 838                 else {
 839                     displayError("System error Error creating pithos: " + t.getMessage());
 840                 }
 841             }
 842
 843             @Override
 844             protected void onUnauthorized(Response response) {
 845                 sessionExpired();
 846             }
 847         };
 848         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 849         Scheduler.get().scheduleDeferred(createPithos);
 850     }
 851
 852     /**
 853      * Creates an HTML fragment that places an image & caption together, for use
 854      * in a group header.
 855      *
 856      * @param imageProto an image prototype for an image
 857      * @param caption    the group caption
 858      * @return the header HTML fragment
 859      */
 860     private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 861         String captionHTML = "<table class='caption' cellpadding='0' "
 862             + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 863             + "</td><td id =" + caption + " class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 864             + caption + "</b></td></tr></table>";
 865         return captionHTML;
 866     }
 867
 868     protected void onWindowResized(int height) {
 869         // Adjust the split panel to take up the available room in the window.
 870         int newHeight = height - splitPanel.getAbsoluteTop() - 153;
 871         if(newHeight < 1) {
 872             newHeight = 1;
 873         }
 874         splitPanel.setHeight("" + newHeight);
 875         inner.setHeight("" + newHeight);
 876     }
 877
 878     native boolean isCloudbarReady()/*-{
 879       if ($wnd.$("div.cloudbar") && $wnd.$("div.cloudbar").height() > 0)
 880         return true;
 881       return false;
 882     }-*/;
 883
 884     @Override
 885     public void onResize(ResizeEvent event) {
 886         int height = event.getHeight();
 887         onWindowResized(height);
 888     }
 889
 890     /**
 891      * Display an error message.
 892      *
 893      * @param msg the message to display
 894      */
 895     public void displayError(String msg) {
 896         messagePanel.displayError(msg);
 897         onWindowResized(Window.getClientHeight());
 898     }
 899
 900     /**
 901      * Display a warning message.
 902      *
 903      * @param msg the message to display
 904      */
 905     public void displayWarning(String msg) {
 906         messagePanel.displayWarning(msg);
 907         onWindowResized(Window.getClientHeight());
 908     }
 909
 910     /**
 911      * Display an informational message.
 912      *
 913      * @param msg the message to display
 914      */
 915     public void displayInformation(String msg) {
 916         messagePanel.displayInformation(msg);
 917         onWindowResized(Window.getClientHeight());
 918     }
 919
 920     /**
 921      * Retrieve the fileList.
 922      *
 923      * @return the fileList
 924      */
 925     public FileList getFileList() {
 926         return fileList;
 927     }
 928
 929     /**
 930      * Retrieve the topPanel.
 931      *
 932      * @return the topPanel
 933      */
 934     TopPanel getTopPanel() {
 935         return topPanel;
 936     }
 937
 938     /**
 939      * Retrieve the clipboard.
 940      *
 941      * @return the clipboard
 942      */
 943     public Clipboard getClipboard() {
 944         return clipboard;
 945     }
 946
 947     public StatusPanel getStatusPanel() {
 948         return statusPanel;
 949     }
 950
 951     public String getUserToken() {
 952         return userToken;
 953     }
 954
 955     public static native void preventIESelection() /*-{
 956       $doc.body.onselectstart = function () {
 957         return false;
 958       };
 959     }-*/;
 960
 961     public static native void enableIESelection() /*-{
 962       if ($doc.body.onselectstart != null)
 963         $doc.body.onselectstart = null;
 964     }-*/;
 965
 966     /**
 967      * @return the absolute path of the API root URL
 968      */
 969     public String getApiPath() {
 970         Configuration conf = (Configuration) GWT.create(Configuration.class);
 971         return conf.apiPath();
 972     }
 973
 974     /**
 975      * History support for folder navigation
 976      * adds a new browser history entry
 977      *
 978      * @param key
 979      */
 980     public void updateHistory(String key) {
 981 //              Replace any whitespace of the initial string to "+"
 982 //              String result = key.replaceAll("\\s","+");
 983 //              Add a new browser history entry.
 984 //              History.newItem(result);
 985         History.newItem(key);
 986     }
 987
 988     public void deleteFolder(final Folder folder, final Command callback) {
 989         final PleaseWaitPopup pwp = new PleaseWaitPopup();
 990         pwp.center();
 991         String path = "/" + folder.getContainer() + "/" + folder.getPrefix() + "?delimiter=/" + "&t=" + System.currentTimeMillis();
 992         DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), folder.getOwnerID(), path) {
 993
 994             @Override
 995             protected void onUnauthorized(Response response) {
 996                 pwp.hide();
 997                 sessionExpired();
 998             }
 999
1000             @Override
1001             public void onSuccess(Resource result) {
1002                 updateFolder(folder.getParent(), true, new Command() {
1003
1004                     @Override
1005                     public void execute() {
1006                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
1007                         updateStatistics();
1008                         if(callback != null) {
1009                             callback.execute();
1010                         }
1011                         pwp.hide();
1012                     }
1013                 }, true);
1014             }
1015
1016             @Override
1017             public void onError(Throwable t) {
1018                 GWT.log("", t);
1019                 setError(t);
1020                 if(t instanceof RestException) {
1021                     if(((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND) {
1022                         displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());
1023                     }
1024                     else {
1025                         onSuccess(null);
1026                     }
1027                 }
1028                 else {
1029                     displayError("System error unable to delete folder: " + t.getMessage());
1030                 }
1031                 pwp.hide();
1032             }
1033         };
1034         deleteFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1035         Scheduler.get().scheduleDeferred(deleteFolder);
1036     }
1037
1038     public FolderTreeView getFolderTreeView() {
1039         return folderTreeView;
1040     }
1041
1042     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
1043         if(iter.hasNext()) {
1044             File file = iter.next();
1045             String path = targetUri + "/" + file.getName();
1046             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
1047                 @Override
1048                 public void onSuccess(Resource result) {
1049                     copyFiles(iter, targetUsername, targetUri, callback);
1050                 }
1051
1052                 @Override
1053                 public void onError(Throwable t) {
1054                     GWT.log("", t);
1055                     setError(t);
1056                     if(t instanceof RestException) {
1057                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
1058                     }
1059                     else {
1060                         displayError("System error unable to copy file: " + t.getMessage());
1061                     }
1062                 }
1063
1064                 @Override
1065                 protected void onUnauthorized(Response response) {
1066                     sessionExpired();
1067                 }
1068             };
1069             copyFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1070             copyFile.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(file.getUri()));
1071             if(!file.getOwnerID().equals(targetUsername)) {
1072                 copyFile.setHeader(Const.X_SOURCE_ACCOUNT, URL.encodePathSegment(file.getOwnerID()));
1073             }
1074             copyFile.setHeader(Const.CONTENT_TYPE, file.getContentType());
1075             Scheduler.get().scheduleDeferred(copyFile);
1076         }
1077         else if(callback != null) {
1078             callback.execute();
1079         }
1080     }
1081
1082     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, boolean move, final Command callback) {
1083         String path = targetUri + "?delimiter=/";
1084         PutRequest copyFolder = new PutRequest(getApiPath(), targetUsername, path) {
1085             @Override
1086             public void onSuccess(Resource result) {
1087                 if(callback != null) {
1088                     callback.execute();
1089                 }
1090             }
1091
1092             @Override
1093             public void onError(Throwable t) {
1094                 GWT.log("", t);
1095                 setError(t);
1096                 if(t instanceof RestException) {
1097                     displayError("Unable to copy folder: " + ((RestException) t).getHttpStatusText());
1098                 }
1099                 else {
1100                     displayError("System error copying folder: " + t.getMessage());
1101                 }
1102             }
1103
1104             @Override
1105             protected void onUnauthorized(Response response) {
1106                 sessionExpired();
1107             }
1108         };
1109         copyFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1110         copyFolder.setHeader(Const.ACCEPT, "*/*");
1111         copyFolder.setHeader(Const.CONTENT_LENGTH, "0");
1112         copyFolder.setHeader(Const.CONTENT_TYPE, "application/directory");
1113         if(!f.getOwnerID().equals(targetUsername)) {
1114             copyFolder.setHeader(Const.X_SOURCE_ACCOUNT, f.getOwnerID());
1115         }
1116         if(move) {
1117             copyFolder.setHeader(Const.X_MOVE_FROM, URL.encodePathSegment(f.getUri()));
1118         }
1119         else {
1120             copyFolder.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(f.getUri()));
1121         }
1122         Scheduler.get().scheduleDeferred(copyFolder);
1123     }
1124
1125     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1126         selectionModels.add(model);
1127     }
1128
1129     public OtherSharedTreeView getOtherSharedTreeView() {
1130         return otherSharedTreeView;
1131     }
1132
1133     public void updateTrash(boolean showFiles, Command callback) {
1134         updateFolder(trash, showFiles, callback, true);
1135     }
1136
1137     public void updateGroupsNode() {
1138         groupTreeView.updateGroupNode(null);
1139     }
1140
1141     public Group addGroup(String groupname) {
1142         Group newGroup = new Group(groupname);
1143         account.addGroup(newGroup);
1144         groupTreeView.updateGroupNode(null);
1145         return newGroup;
1146     }
1147
1148     public void removeGroup(Group group) {
1149         account.removeGroup(group);
1150         updateGroupsNode();
1151     }
1152
1153     public TreeView getSelectedTree() {
1154         return selectedTree;
1155     }
1156
1157     public void setSelectedTree(TreeView selected) {
1158         selectedTree = selected;
1159     }
1160
1161     public Folder getSelection() {
1162         if(selectedTree != null) {
1163             return selectedTree.getSelection();
1164         }
1165         return null;
1166     }
1167
1168     public void showFolderStatistics(int folderFileCount) {
1169         numOfFiles.setHTML(String.valueOf(folderFileCount));
1170     }
1171
1172     public GroupTreeView getGroupTreeView() {
1173         return groupTreeView;
1174     }
1175
1176     public void sessionExpired() {
1177         new SessionExpiredDialog(this).center();
1178     }
1179
1180     public void updateRootFolder(Command callback) {
1181         updateFolder(account.getPithos(), false, callback, true);
1182     }
1183
1184     void createMySharedTree() {
1185         LOG("Pithos::createMySharedTree()");
1186         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1187         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1188             @Override
1189             public void onSelectionChange(SelectionChangeEvent event) {
1190                 if(mysharedTreeSelectionModel.getSelectedObject() != null) {
1191                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1192                     upload.setEnabled(false);
1193                     disableUploadArea();
1194                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1195                     showRelevantToolbarButtons();
1196                 }
1197                 else {
1198                     if(getSelectedTree().equals(mysharedTreeView)) {
1199                         setSelectedTree(null);
1200                     }
1201                     if(getSelectedTree() == null) {
1202                         showRelevantToolbarButtons();
1203                     }
1204                 }
1205             }
1206         });
1207         selectionModels.add(mysharedTreeSelectionModel);
1208         mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1209         mysharedTreeViewModel.initialize(new Command() {
1210
1211             @Override
1212             public void execute() {
1213                 mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1214                 trees.insert(mysharedTreeView, 2);
1215                 treeViews.add(mysharedTreeView);
1216                 createOtherSharedTree();
1217             }
1218         });
1219     }
1220
1221     void createOtherSharedTree() {
1222         LOG("Pithos::createOtherSharedTree()");
1223         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1224         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1225             @Override
1226             public void onSelectionChange(SelectionChangeEvent event) {
1227                 if(otherSharedTreeSelectionModel.getSelectedObject() != null) {
1228                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1229                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1230                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true, null);
1231                     showRelevantToolbarButtons();
1232                 }
1233                 else {
1234                     if(getSelectedTree().equals(otherSharedTreeView)) {
1235                         setSelectedTree(null);
1236                     }
1237                     if(getSelectedTree() == null) {
1238                         showRelevantToolbarButtons();
1239                     }
1240                 }
1241             }
1242         });
1243         selectionModels.add(otherSharedTreeSelectionModel);
1244         otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1245         LOG("Pithos::createOtherSharedTree(), initializing otherSharedTreeViewModel with a callback");
1246         otherSharedTreeViewModel.initialize(new Command() {
1247             @Override
1248             public void execute() {
1249                 otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1250                 trees.insert(otherSharedTreeView, 1);
1251                 treeViews.add(otherSharedTreeView);
1252                 scheduleResfresh();
1253             }
1254         });
1255     }
1256
1257     public String getErrorData() {
1258         final StringBuilder sb = new StringBuilder();
1259         final String NL = Const.NL;
1260         Throwable t = this.error;
1261         while(t != null) {
1262             sb.append(t.toString());
1263             sb.append(NL);
1264             StackTraceElement[] traces = t.getStackTrace();
1265             for(StackTraceElement trace : traces) {
1266                 sb.append("  [");
1267                 sb.append(trace.getClassName());
1268                 sb.append("::");
1269                 sb.append(trace.getMethodName());
1270                 sb.append("() at ");
1271                 sb.append(trace.getFileName());
1272                 sb.append(":");
1273                 sb.append(trace.getLineNumber());
1274                 sb.append("]");
1275                 sb.append(NL);
1276             }
1277             t = t.getCause();
1278         }
1279
1280         return sb.toString();
1281     }
1282
1283     public void setError(Throwable t) {
1284         error = t;
1285     }
1286
1287     public void showRelevantToolbarButtons() {
1288         toolbar.showRelevantButtons();
1289     }
1290
1291     public FileUploadDialog getFileUploadDialog() {
1292         if(fileUploadDialog == null) {
1293             fileUploadDialog = new FileUploadDialog(this);
1294         }
1295         return fileUploadDialog;
1296     }
1297
1298     public void hideUploadIndicator() {
1299         upload.removeStyleName("pithos-uploadButton-loading");
1300         upload.setTitle("");
1301     }
1302
1303     public void showUploadIndicator() {
1304         upload.addStyleName("pithos-uploadButton-loading");
1305         upload.setTitle("Upload in progress. Click for details.");
1306     }
1307
1308     public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1309         if(folder == null) {
1310             if(callback != null) {
1311                 callback.execute();
1312             }
1313         }
1314         else {
1315             HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwnerID(), folder.getUri(), folder) {
1316
1317                 @Override
1318                 public void onSuccess(Folder _result) {
1319                     if(callback != null) {
1320                         callback.execute();
1321                     }
1322                 }
1323
1324                 @Override
1325                 public void onError(Throwable t) {
1326                     if(t instanceof RestException) {
1327                         if(((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1328                             final String path = folder.getUri();
1329                             PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwnerID(), path) {
1330                                 @Override
1331                                 public void onSuccess(Resource _result) {
1332                                     scheduleFolderHeadCommand(folder, callback);
1333                                 }
1334
1335                                 @Override
1336                                 public void onError(Throwable _t) {
1337                                     GWT.log("", _t);
1338                                     setError(_t);
1339                                     if(_t instanceof RestException) {
1340                                         displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1341                                     }
1342                                     else {
1343                                         displayError("System error creating folder: " + _t.getMessage());
1344                                     }
1345                                 }
1346
1347                                 @Override
1348                                 protected void onUnauthorized(Response response) {
1349                                     sessionExpired();
1350                                 }
1351                             };
1352                             newFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1353                             newFolder.setHeader(Const.CONTENT_TYPE, "application/folder");
1354                             newFolder.setHeader(Const.ACCEPT, "*/*");
1355                             newFolder.setHeader(Const.CONTENT_LENGTH, "0");
1356                             Scheduler.get().scheduleDeferred(newFolder);
1357                         }
1358                         else if(((RestException) t).getHttpStatusCode() == Response.SC_FORBIDDEN) {
1359                             onSuccess(folder);
1360                         }
1361                         else {
1362                             displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1363                         }
1364                     }
1365                     else {
1366                         displayError("System error heading folder: " + t.getMessage());
1367                     }
1368
1369                     GWT.log("Error heading folder", t);
1370                     setError(t);
1371                 }
1372
1373                 @Override
1374                 protected void onUnauthorized(Response response) {
1375                     sessionExpired();
1376                 }
1377             };
1378             headFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1379             Scheduler.get().scheduleDeferred(headFolder);
1380         }
1381     }
1382
1383     public void scheduleFileHeadCommand(File f, final Command callback) {
1384         HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwnerID(), f.getUri(), f) {
1385
1386             @Override
1387             public void onSuccess(File _result) {
1388                 if(callback != null) {
1389                     callback.execute();
1390                 }
1391             }
1392
1393             @Override
1394             public void onError(Throwable t) {
1395                 GWT.log("Error heading file", t);
1396                 setError(t);
1397                 if(t instanceof RestException) {
1398                     displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1399                 }
1400                 else {
1401                     displayError("System error heading file: " + t.getMessage());
1402                 }
1403             }
1404
1405             @Override
1406             protected void onUnauthorized(Response response) {
1407                 sessionExpired();
1408             }
1409         };
1410         headFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1411         Scheduler.get().scheduleDeferred(headFile);
1412     }
1413
1414     public boolean isMySharedSelected() {
1415         return getSelectedTree().equals(getMySharedTreeView());
1416     }
1417
1418     private Folder getUploadFolder() {
1419         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1420             return getSelection();
1421         }
1422         return null;
1423     }
1424
1425     private void updateUploadFolder() {
1426         updateUploadFolder(null);
1427     }
1428
1429     private void updateUploadFolder(final JsArrayString urls) {
1430         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1431             Folder f = getSelection();
1432             if(getSelectedTree().equals(getFolderTreeView())) {
1433                 updateFolder(f, true, new Command() {
1434
1435                     @Override
1436                     public void execute() {
1437                         updateStatistics();
1438                         if(urls != null) {
1439                             selectUploadedFiles(urls);
1440                         }
1441                     }
1442                 }, false);
1443             }
1444             else {
1445                 updateOtherSharedFolder(f, true, null);
1446             }
1447         }
1448     }
1449
1450     public native void disableUploadArea() /*-{
1451       var uploader = $wnd.$("#uploader").pluploadQueue();
1452       var dropElm = $wnd.document.getElementById('rightPanel');
1453       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1454     }-*/;
1455
1456     public native void enableUploadArea() /*-{
1457       var uploader = $wnd.$("#uploader").pluploadQueue();
1458       var dropElm = $wnd.document.getElementById('rightPanel');
1459       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1460       if (uploader.runtime == 'html5') {
1461         uploader.settings.drop_element = 'rightPanel';
1462         uploader.trigger('PostInit');
1463       }
1464     }-*/;
1465
1466     public void showUploadAlert(int nOfFiles) {
1467         if(uploadAlert == null) {
1468             uploadAlert = new UploadAlert(this, nOfFiles);
1469         }
1470         if(!uploadAlert.isShowing()) {
1471             uploadAlert.setPopupPositionAndShow(new PopupPanel.PositionCallback() {
1472
1473                 @Override
1474                 public void setPosition(int offsetWidth, int offsetHeight) {
1475                     uploadAlert.setPopupPosition((Window.getClientWidth() - offsetWidth) / 2, statusPanel.getAbsoluteTop() - offsetHeight);
1476                 }
1477             });
1478         }
1479         uploadAlert.setNumOfFiles(nOfFiles);
1480     }
1481
1482     public void hideUploadAlert() {
1483         if(uploadAlert != null && uploadAlert.isShowing()) {
1484             uploadAlert.hide();
1485         }
1486     }
1487
1488     public void selectUploadedFiles(JsArrayString urls) {
1489         List<String> selectedUrls = new ArrayList<String>();
1490         for(int i = 0; i < urls.length(); i++) {
1491             selectedUrls.add(urls.get(i));
1492         }
1493         fileList.selectByUrl(selectedUrls);
1494     }
1495
1496     public void emptyContainer(final Folder container) {
1497         String path = "/" + container.getName() + "?delimiter=/";
1498         DeleteRequest delete = new DeleteRequest(getApiPath(), getUserID(), path) {
1499
1500             @Override
1501             protected void onUnauthorized(Response response) {
1502                 sessionExpired();
1503             }
1504
1505             @Override
1506             public void onSuccess(Resource result) {
1507                 updateFolder(container, true, null, true);
1508             }
1509
1510             @Override
1511             public void onError(Throwable t) {
1512                 GWT.log("Error deleting trash", t);
1513                 setError(t);
1514                 if(t instanceof RestException) {
1515                     displayError("Error deleting trash: " + ((RestException) t).getHttpStatusText());
1516                 }
1517                 else {
1518                     displayError("System error deleting trash: " + t.getMessage());
1519                 }
1520             }
1521         };
1522         delete.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1523         Scheduler.get().scheduleDeferred(delete);
1524     }
1525 }