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     private static final boolean IsLOGEnabled = false;
  82     public static final boolean IsDetailedHTTPLOGEnabled = true;
  83     public static final boolean IsFullResponseBodyLOGEnabled = true;
  84
  85     public static final Set<String> HTTPHeadersToIgnoreInLOG = new HashSet<String>();
  86     static {
  87         HTTPHeadersToIgnoreInLOG.add(Const.HTTP_HEADER_CONNECTION);
  88         HTTPHeadersToIgnoreInLOG.add(Const.HTTP_HEADER_DATE);
  89         HTTPHeadersToIgnoreInLOG.add(Const.HTTP_HEADER_KEEP_ALIVE);
  90         HTTPHeadersToIgnoreInLOG.add(Const.HTTP_HEADER_SERVER);
  91         HTTPHeadersToIgnoreInLOG.add(Const.HTTP_HEADER_VARY);
  92         HTTPHeadersToIgnoreInLOG.add(Const.IF_MODIFIED_SINCE);
  93     }
  94
  95     public static final Configuration config = GWT.create(Configuration.class);
  96
  97     public interface Style extends CssResource {
  98         String commandAnchor();
  99
 100         String statistics();
 101
 102         @ClassName("gwt-HTML")
 103         String html();
 104
 105         String uploadAlert();
 106
 107         String uploadAlertLink();
 108
 109         String uploadAlertProgress();
 110
 111         String uploadAlertPercent();
 112
 113         String uploadAlertClose();
 114     }
 115
 116     public interface Resources extends ClientBundle {
 117         @Source("Pithos.css")
 118         Style pithosCss();
 119
 120         @Source("gr/grnet/pithos/resources/close-popup.png")
 121         ImageResource closePopup();
 122     }
 123
 124     public static Resources resources = GWT.create(Resources.class);
 125
 126     /**
 127      * Instantiate an application-level image bundle. This object will provide
 128      * programmatic access to all the images needed by widgets.
 129      */
 130     static Images images = (Images) GWT.create(Images.class);
 131
 132     public String getUserID() {
 133         return userID;
 134     }
 135
 136     public UserCatalogs getUserCatalogs() {
 137         return userCatalogs;
 138     }
 139
 140     public String getCurrentUserDisplayNameOrID() {
 141         final String displayName = userCatalogs.getDisplayName(getUserID());
 142         return displayName == null ? getUserID() : displayName;
 143     }
 144
 145     public boolean hasDisplayNameForUserID(String userID) {
 146         return userCatalogs.getDisplayName(userID) != null;
 147     }
 148
 149     public boolean hasIDForUserDisplayName(String userDisplayName) {
 150         return userCatalogs.getID(userDisplayName) != null;
 151     }
 152
 153     public String getDisplayNameForUserID(String userID) {
 154         return userCatalogs.getDisplayName(userID);
 155     }
 156
 157     public String getIDForUserDisplayName(String userDisplayName) {
 158         return userCatalogs.getID(userDisplayName);
 159     }
 160
 161     public List<String> getDisplayNamesForUserIDs(List<String> userIDs) {
 162         if(userIDs == null) {
 163             userIDs = new ArrayList<String>();
 164         }
 165         final List<String> userDisplayNames = new ArrayList<String>();
 166         for(String userID : userIDs) {
 167             final String displayName = getDisplayNameForUserID(userID);
 168             userDisplayNames.add(displayName);
 169         }
 170
 171         return userDisplayNames;
 172     }
 173
 174     public List<String> filterUserIDsWithUnknownDisplayName(Collection<String> userIDs) {
 175         if(userIDs == null) {
 176             userIDs = new ArrayList<String>();
 177         }
 178         final List<String> filtered = new ArrayList<String>();
 179         for(String userID : userIDs) {
 180             if(!this.userCatalogs.hasID(userID)) {
 181                 filtered.add(userID);
 182             }
 183         }
 184         return filtered;
 185     }
 186
 187     public void setAccount(AccountResource acct) {
 188         account = acct;
 189     }
 190
 191     public AccountResource getAccount() {
 192         return account;
 193     }
 194
 195     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 196         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 197     }
 198
 199     public void updateGroupNode(Group group) {
 200         groupTreeView.updateGroupNode(group);
 201     }
 202
 203     public void updateMySharedRoot() {
 204         mysharedTreeView.updateRoot();
 205     }
 206
 207     public void updateSharedFolder(Folder f, boolean showfiles, Command callback) {
 208         mysharedTreeView.updateFolder(f, showfiles, callback);
 209     }
 210
 211     public void updateSharedFolder(Folder f, boolean showfiles) {
 212         updateSharedFolder(f, showfiles, null);
 213     }
 214
 215     public void updateOtherSharedFolder(Folder f, boolean showfiles, Command callback) {
 216         otherSharedTreeView.updateFolder(f, showfiles, callback);
 217     }
 218
 219     public MysharedTreeView getMySharedTreeView() {
 220         return mysharedTreeView;
 221     }
 222
 223     /**
 224      * An aggregate image bundle that pulls together all the images for this
 225      * application into a single bundle.
 226      */
 227     public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 228
 229         @Source("gr/grnet/pithos/resources/document.png")
 230         ImageResource folders();
 231
 232         @Source("gr/grnet/pithos/resources/advancedsettings.png")
 233         @ImageOptions(width = 32, height = 32)
 234         ImageResource tools();
 235     }
 236
 237     private Throwable error;
 238
 239     /**
 240      * The Application Clipboard implementation;
 241      */
 242     private Clipboard clipboard = new Clipboard();
 243
 244     /**
 245      * The top panel that contains the menu bar.
 246      */
 247     private TopPanel topPanel;
 248
 249     /**
 250      * The panel that contains the various system messages.
 251      */
 252     private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 253
 254     /**
 255      * The bottom panel that contains the status bar.
 256      */
 257     StatusPanel statusPanel = null;
 258
 259     /**
 260      * The file list widget.
 261      */
 262     private FileList fileList;
 263
 264     /**
 265      * The tab panel that occupies the right side of the screen.
 266      */
 267     private VerticalPanel inner = new VerticalPanel();
 268
 269
 270     /**
 271      * The split panel that will contain the left and right panels.
 272      */
 273     private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 274
 275     /**
 276      * The currently selected item in the application, for use by the Edit menu
 277      * commands. Potential types are Folder, File, User and Group.
 278      */
 279     private Object currentSelection;
 280
 281     public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 282
 283     /**
 284      * The ID that uniquely identifies the user in Pithos+.
 285      * Currently this is a UUID. It used to be the user's email.
 286      */
 287     private String userID = null;
 288
 289     /**
 290      * Hold mappings from user UUIDs to emails and vice-versa.
 291      */
 292     private UserCatalogs userCatalogs = new UserCatalogs();
 293
 294     /**
 295      * The authentication token of the current user.
 296      */
 297     private String userToken;
 298
 299     VerticalPanel trees;
 300
 301     SingleSelectionModel<Folder> folderTreeSelectionModel;
 302     FolderTreeViewModel folderTreeViewModel;
 303     FolderTreeView folderTreeView;
 304
 305     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 306     MysharedTreeViewModel mysharedTreeViewModel;
 307     MysharedTreeView mysharedTreeView = null;
 308
 309     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 310     OtherSharedTreeViewModel otherSharedTreeViewModel;
 311     OtherSharedTreeView otherSharedTreeView = null;
 312
 313     GroupTreeViewModel groupTreeViewModel;
 314     GroupTreeView groupTreeView;
 315
 316     TreeView selectedTree;
 317     protected AccountResource account;
 318
 319     Folder trash;
 320
 321     List<Composite> treeViews = new ArrayList<Composite>();
 322
 323     @SuppressWarnings("rawtypes")
 324     List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 325
 326     public Button upload;
 327
 328     private HTML numOfFiles;
 329
 330     private Toolbar toolbar;
 331
 332     private FileUploadDialog fileUploadDialog = new FileUploadDialog(this);
 333
 334     UploadAlert uploadAlert;
 335
 336     Date lastModified;
 337
 338     @Override
 339     public void onModuleLoad() {
 340         if(parseUserCredentials()) {
 341             initialize();
 342         }
 343     }
 344
 345     static native void __ConsoleLog(String message) /*-{
 346       try { console.log(message); } catch (e) {}
 347     }-*/;
 348
 349     public static void LOGError(Throwable error, StringBuilder sb) {
 350         if(!isLOGEnabled()) { return; }
 351
 352         sb.append("\nException: [" + error.toString().replace("\n", "\n  ") + "]");
 353         Throwable cause = error.getCause();
 354         if(cause != null) {
 355             sb.append("\nCauses:\n");
 356             while(cause != null) {
 357                 sb.append("  ");
 358                 sb.append("[" + cause.toString().replace("\n", "\n  ")  + "]");
 359                 sb.append("\n");
 360                 cause = cause.getCause();
 361             }
 362         }
 363         else {
 364             sb.append("\n");
 365         }
 366
 367         StackTraceElement[] stackTrace = error.getStackTrace();
 368         sb.append("Stack trace (" + stackTrace.length + " elements):\n");
 369         for(int i = 0; i < stackTrace.length; i++) {
 370             StackTraceElement errorElem = stackTrace[i];
 371             sb.append("  [" + i + "] ");
 372             sb.append(errorElem.toString());
 373             sb.append("\n");
 374         }
 375     }
 376
 377     public static void LOGError(Throwable error) {
 378         if(!isLOGEnabled()) { return; }
 379
 380         final StringBuilder sb = new StringBuilder();
 381         LOGError(error, sb);
 382         if(sb.length() > 0) {
 383             __ConsoleLog(sb.toString());
 384         }
 385     }
 386
 387     public static boolean isLOGEnabled() {
 388         return IsLOGEnabled;
 389     }
 390
 391     public static void LOG(Object ...args) {
 392         if(!isLOGEnabled()) { return; }
 393
 394         final StringBuilder sb = new StringBuilder();
 395         for(Object arg : args) {
 396             if(arg instanceof Throwable) {
 397                 LOGError((Throwable) arg, sb);
 398             }
 399             else {
 400                 sb.append(arg);
 401             }
 402         }
 403
 404         if(sb.length() > 0) {
 405             __ConsoleLog(sb.toString());
 406         }
 407     }
 408
 409     private void initialize() {
 410         userCatalogs.updateWithIDAndName("*", "All Pithos users");
 411
 412         lastModified = new Date(); //Initialize if-modified-since value with now.
 413         resources.pithosCss().ensureInjected();
 414         boolean bareContent = Window.Location.getParameter("noframe") != null;
 415         String contentWidth = bareContent ? Const.PERCENT_100 : Const.PERCENT_75;
 416
 417         VerticalPanel outer = new VerticalPanel();
 418         outer.setWidth(Const.PERCENT_100);
 419         if(!bareContent) {
 420             outer.addStyleName("pithos-outer");
 421         }
 422
 423         if(!bareContent) {
 424             topPanel = new TopPanel(this, Pithos.images);
 425             topPanel.setWidth(Const.PERCENT_100);
 426             outer.add(topPanel);
 427             outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 428         }
 429
 430         messagePanel.setVisible(false);
 431         outer.add(messagePanel);
 432         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 433         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 434
 435         HorizontalPanel header = new HorizontalPanel();
 436         header.addStyleName("pithos-header");
 437         header.setWidth(contentWidth);
 438         if(bareContent) {
 439             header.addStyleName("pithos-header-noframe");
 440         }
 441         upload = new Button("Upload", new ClickHandler() {
 442             @Override
 443             public void onClick(ClickEvent event) {
 444                 if(getSelection() != null) {
 445                     new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 446                 }
 447             }
 448         });
 449         upload.addStyleName("pithos-uploadButton");
 450         header.add(upload);
 451         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 452         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 453
 454         toolbar = new Toolbar(this);
 455         header.add(toolbar);
 456         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 457         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 458
 459         HorizontalPanel folderStatistics = new HorizontalPanel();
 460         folderStatistics.addStyleName("pithos-folderStatistics");
 461         numOfFiles = new HTML();
 462         folderStatistics.add(numOfFiles);
 463         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 464         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 465         folderStatistics.add(numOfFilesLabel);
 466         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 467         header.add(folderStatistics);
 468         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 469         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 470         header.setCellWidth(folderStatistics, "40px");
 471         outer.add(header);
 472         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 473         // Inner contains the various lists
 474         inner.sinkEvents(Event.ONCONTEXTMENU);
 475         inner.setWidth(Const.PERCENT_100);
 476
 477         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 478         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 479             @Override
 480             public void onSelectionChange(SelectionChangeEvent event) {
 481                 if(folderTreeSelectionModel.getSelectedObject() != null) {
 482                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 483                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 484                     Folder f = folderTreeSelectionModel.getSelectedObject();
 485                     updateFolder(f, true, new Command() {
 486
 487                         @Override
 488                         public void execute() {
 489                             updateStatistics();
 490                         }
 491                     }, true);
 492                     showRelevantToolbarButtons();
 493                 }
 494                 else {
 495                     if(getSelectedTree().equals(folderTreeView)) {
 496                         setSelectedTree(null);
 497                     }
 498                     if(getSelectedTree() == null) {
 499                         showRelevantToolbarButtons();
 500                     }
 501                 }
 502             }
 503         });
 504         selectionModels.add(folderTreeSelectionModel);
 505
 506         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 507         folderTreeView = new FolderTreeView(folderTreeViewModel);
 508         treeViews.add(folderTreeView);
 509
 510         fileList = new FileList(this, images);
 511         inner.add(fileList);
 512
 513         trees = new VerticalPanel();
 514         trees.setWidth(Const.PERCENT_100);
 515
 516         // Add the left and right panels to the split panel.
 517         splitPanel.setLeftWidget(trees);
 518         FlowPanel right = new FlowPanel();
 519         right.getElement().setId("rightPanel");
 520         right.add(inner);
 521         splitPanel.setRightWidget(right);
 522         splitPanel.setSplitPosition("219px");
 523         splitPanel.setSize(Const.PERCENT_100, Const.PERCENT_100);
 524         splitPanel.addStyleName("pithos-splitPanel");
 525         splitPanel.setWidth(contentWidth);
 526         outer.add(splitPanel);
 527         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 528
 529         if(!bareContent) {
 530             statusPanel = new StatusPanel();
 531             statusPanel.setWidth(Const.PERCENT_100);
 532             outer.add(statusPanel);
 533             outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 534         }
 535         else {
 536             splitPanel.addStyleName("pithos-splitPanel-noframe");
 537         }
 538
 539         // Hook the window resize event, so that we can adjust the UI.
 540         Window.addResizeHandler(this);
 541         // Clear out the window's built-in margin, because we want to take
 542         // advantage of the entire client area.
 543         Window.setMargin("0px");
 544         // Finally, add the outer panel to the RootPanel, so that it will be
 545         // displayed.
 546         RootPanel.get().add(outer);
 547         // Call the window resized handler to get the initial sizes setup. Doing
 548         // this in a deferred command causes it to occur after all widgets'
 549         // sizes have been computed by the browser.
 550         Scheduler.get().scheduleIncremental(new RepeatingCommand() {
 551
 552             @Override
 553             public boolean execute() {
 554                 if(!isCloudbarReady()) {
 555                     return true;
 556                 }
 557                 onWindowResized(Window.getClientHeight());
 558                 return false;
 559             }
 560         });
 561
 562         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 563             @Override
 564             public void execute() {
 565                 LOG("Pithos::initialize() Calling Pithos::fetchAccount()");
 566                 fetchAccount(new Command() {
 567
 568                     @Override
 569                     public void execute() {
 570                         if(!account.hasHomeContainer()) {
 571                             createHomeContainer(account, this);
 572                         }
 573                         else if(!account.hasTrashContainer()) {
 574                             createTrashContainer(this);
 575                         }
 576                         else {
 577                             for(Folder f : account.getContainers()) {
 578                                 if(f.getName().equals(Const.TRASH_CONTAINER)) {
 579                                     trash = f;
 580                                     break;
 581                                 }
 582                             }
 583                             trees.add(folderTreeView);
 584                             folderTreeViewModel.initialize(account, new Command() {
 585
 586                                 @Override
 587                                 public void execute() {
 588                                     createMySharedTree();
 589                                 }
 590                             });
 591
 592                             HorizontalPanel separator = new HorizontalPanel();
 593                             separator.addStyleName("pithos-statisticsSeparator");
 594                             separator.add(new HTML(""));
 595                             trees.add(separator);
 596
 597                             groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 598                             groupTreeView = new GroupTreeView(groupTreeViewModel);
 599                             treeViews.add(groupTreeView);
 600                             trees.add(groupTreeView);
 601                             folderTreeView.showStatistics(account);
 602                         }
 603                     }
 604                 });
 605             }
 606         });
 607     }
 608
 609     public void scheduleResfresh() {
 610         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 611
 612             @Override
 613             public boolean execute() {
 614                 final Folder f = getSelection();
 615                 if(f == null) {
 616                     return true;
 617                 }
 618
 619                 HeadRequest<Folder> head = new HeadRequest<Folder>(Folder.class, getApiPath(), f.getOwnerID(), "/" + f.getContainer()) {
 620
 621                     @Override
 622                     public void onSuccess(Folder _result) {
 623                         lastModified = new Date();
 624                         if(getSelectedTree().equals(folderTreeView)) {
 625                             updateFolder(f, true, new Command() {
 626
 627                                 @Override
 628                                 public void execute() {
 629                                     scheduleResfresh();
 630                                 }
 631
 632                             }, false);
 633                         }
 634                         else if(getSelectedTree().equals(mysharedTreeView)) {
 635                             updateSharedFolder(f, true, new Command() {
 636
 637                                 @Override
 638                                 public void execute() {
 639                                     scheduleResfresh();
 640                                 }
 641                             });
 642                         }
 643                         else {
 644                             scheduleResfresh();
 645                         }
 646                     }
 647
 648                     @Override
 649                     public void onError(Throwable t) {
 650                         if(t instanceof RestException && ((RestException) t).getHttpStatusCode() == HttpStatus.SC_NOT_MODIFIED) {
 651                             scheduleResfresh();
 652                         }
 653                         else if(retries >= MAX_RETRIES) {
 654                             LOG("Error heading folder. ", t);
 655                             setError(t);
 656                             if(t instanceof RestException) {
 657                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
 658                             }
 659                             else {
 660                                 displayError("System error heading folder: " + t.getMessage());
 661                             }
 662                         }
 663                         else {//retry
 664                             LOG("Retry ", retries);
 665                             Scheduler.get().scheduleDeferred(this);
 666                         }
 667                     }
 668
 669                     @Override
 670                     protected void onUnauthorized(Response response) {
 671                         if(retries >= MAX_RETRIES) {
 672                             sessionExpired();
 673                         }
 674                         else //retry
 675                         {
 676                             Scheduler.get().scheduleDeferred(this);
 677                         }
 678                     }
 679                 };
 680                 head.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 681                 head.setHeader(Const.IF_MODIFIED_SINCE, DateTimeFormat.getFormat(Const.DATE_FORMAT_1).format(lastModified, TimeZone.createTimeZone(0)) + " GMT");
 682                 Scheduler.get().scheduleDeferred(head);
 683
 684                 return false;
 685             }
 686         }, 3000);
 687     }
 688
 689     public void applyPermissions(Folder f) {
 690         if(f != null) {
 691             if(f.isInTrash()) {
 692                 upload.setEnabled(false);
 693                 disableUploadArea();
 694             }
 695             else {
 696                 Boolean[] perms = f.getPermissions().get(userID);
 697                 if(f.getOwnerID().equals(userID) || (perms != null && perms[1] != null && perms[1])) {
 698                     upload.setEnabled(true);
 699                     enableUploadArea();
 700                 }
 701                 else {
 702                     upload.setEnabled(false);
 703                     disableUploadArea();
 704                 }
 705             }
 706         }
 707         else {
 708             upload.setEnabled(false);
 709             disableUploadArea();
 710         }
 711     }
 712
 713     @SuppressWarnings({"rawtypes", "unchecked"})
 714     public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 715         selectedTree = _selectedTree;
 716
 717         for(SingleSelectionModel s : selectionModels) {
 718             if(!s.equals(model) && s.getSelectedObject() != null) {
 719                 s.setSelected(s.getSelectedObject(), false);
 720             }
 721         }
 722     }
 723
 724     public void showFiles(final Folder f) {
 725         Set<File> files = f.getFiles();
 726         showFiles(files);
 727     }
 728
 729     public void showFiles(Set<File> files) {
 730         fileList.setFiles(new ArrayList<File>(files));
 731     }
 732
 733     /**
 734      * Parse and store the user credentials to the appropriate fields.
 735      */
 736     private boolean parseUserCredentials() {
 737         Configuration conf = (Configuration) GWT.create(Configuration.class);
 738         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 739         String cookie = otherProperties.get(Const.AUTH_COOKIE);
 740         String auth = Cookies.getCookie(cookie);
 741         if(auth == null) {
 742             authenticateUser();
 743             return false;
 744         }
 745         if(auth.startsWith("\"")) {
 746             auth = auth.substring(1);
 747         }
 748         if(auth.endsWith("\"")) {
 749             auth = auth.substring(0, auth.length() - 1);
 750         }
 751         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 752         if(authSplit.length != 2) {
 753             authenticateUser();
 754             return false;
 755         }
 756         userID = authSplit[0];
 757         userToken = authSplit[1];
 758
 759         String gotoUrl = Window.Location.getParameter("goto");
 760         if(gotoUrl != null && gotoUrl.length() > 0) {
 761             Window.Location.assign(gotoUrl);
 762             return false;
 763         }
 764         return true;
 765     }
 766
 767     /**
 768      * Redirect the user to the login page for authentication.
 769      */
 770     protected void authenticateUser() {
 771         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 772         Window.Location.assign(otherProperties.get(Const.LOGIN_URL) + Window.Location.getHref());
 773     }
 774
 775     public void fetchAccount(final Command callback) {
 776         String path = "?format=json";
 777
 778         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), userID, path) {
 779             @Override
 780             public void onSuccess(AccountResource accountResource) {
 781                 account = accountResource;
 782                 if(callback != null) {
 783                     callback.execute();
 784                 }
 785
 786                 final List<String> memberIDs = new ArrayList<String>();
 787                 final List<Group> groups = account.getGroups();
 788                 for(Group group : groups) {
 789                     memberIDs.addAll(group.getMemberIDs());
 790                 }
 791                 memberIDs.add(Pithos.this.getUserID());
 792
 793                 final List<String> theUnknown = Pithos.this.filterUserIDsWithUnknownDisplayName(memberIDs);
 794                 // Initialize the user catalog
 795                 new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();
 796                 LOG("Called new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();");
 797             }
 798
 799             @Override
 800             public void onError(Throwable t) {
 801                 LOG("Error getting account", t);
 802                 setError(t);
 803                 if(t instanceof RestException) {
 804                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 805                 }
 806                 else {
 807                     displayError("System error fetching user data: " + t.getMessage());
 808                 }
 809             }
 810
 811             @Override
 812             protected void onUnauthorized(Response response) {
 813                 sessionExpired();
 814             }
 815         };
 816         getAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 817         Scheduler.get().scheduleDeferred(getAccount);
 818     }
 819
 820     public void updateStatistics() {
 821         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), userID, "", account) {
 822
 823             @Override
 824             public void onSuccess(AccountResource _result) {
 825                 folderTreeView.showStatistics(account);
 826             }
 827
 828             @Override
 829             public void onError(Throwable t) {
 830                 LOG("Error getting account", t);
 831                 setError(t);
 832                 if(t instanceof RestException) {
 833                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 834                 }
 835                 else {
 836                     displayError("System error fetching user data: " + t.getMessage());
 837                 }
 838             }
 839
 840             @Override
 841             protected void onUnauthorized(Response response) {
 842                 sessionExpired();
 843             }
 844         };
 845         headAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 846         Scheduler.get().scheduleDeferred(headAccount);
 847     }
 848
 849     protected void createHomeContainer(final AccountResource _account, final Command callback) {
 850         String path = "/" + Const.HOME_CONTAINER;
 851         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 852             @Override
 853             public void onSuccess(Resource result) {
 854                 if(!_account.hasTrashContainer()) {
 855                     createTrashContainer(callback);
 856                 }
 857                 else {
 858                     fetchAccount(callback);
 859                 }
 860             }
 861
 862             @Override
 863             public void onError(Throwable t) {
 864                 LOG("Error creating pithos", t);
 865                 setError(t);
 866                 if(t instanceof RestException) {
 867                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 868                 }
 869                 else {
 870                     displayError("System error Error creating pithos: " + t.getMessage());
 871                 }
 872             }
 873
 874             @Override
 875             protected void onUnauthorized(Response response) {
 876                 sessionExpired();
 877             }
 878         };
 879         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 880         Scheduler.get().scheduleDeferred(createPithos);
 881     }
 882
 883     protected void createTrashContainer(final Command callback) {
 884         String path = "/" + Const.TRASH_CONTAINER;
 885         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 886             @Override
 887             public void onSuccess(Resource result) {
 888                 fetchAccount(callback);
 889             }
 890
 891             @Override
 892             public void onError(Throwable t) {
 893                 LOG("Error creating pithos", t);
 894                 setError(t);
 895                 if(t instanceof RestException) {
 896                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 897                 }
 898                 else {
 899                     displayError("System error Error creating pithos: " + t.getMessage());
 900                 }
 901             }
 902
 903             @Override
 904             protected void onUnauthorized(Response response) {
 905                 sessionExpired();
 906             }
 907         };
 908         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 909         Scheduler.get().scheduleDeferred(createPithos);
 910     }
 911
 912     /**
 913      * Creates an HTML fragment that places an image & caption together, for use
 914      * in a group header.
 915      *
 916      * @param imageProto an image prototype for an image
 917      * @param caption    the group caption
 918      * @return the header HTML fragment
 919      */
 920     private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 921         String captionHTML = "<table class='caption' cellpadding='0' "
 922             + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 923             + "</td><td id =" + caption + " class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 924             + caption + "</b></td></tr></table>";
 925         return captionHTML;
 926     }
 927
 928     protected void onWindowResized(int height) {
 929         // Adjust the split panel to take up the available room in the window.
 930         int newHeight = height - splitPanel.getAbsoluteTop() - 153;
 931         if(newHeight < 1) {
 932             newHeight = 1;
 933         }
 934         splitPanel.setHeight("" + newHeight);
 935         inner.setHeight("" + newHeight);
 936     }
 937
 938     native boolean isCloudbarReady()/*-{
 939       if ($wnd.$("div.cloudbar") && $wnd.$("div.cloudbar").height() > 0)
 940         return true;
 941       return false;
 942     }-*/;
 943
 944     @Override
 945     public void onResize(ResizeEvent event) {
 946         int height = event.getHeight();
 947         onWindowResized(height);
 948     }
 949
 950     /**
 951      * Display an error message.
 952      *
 953      * @param msg the message to display
 954      */
 955     public void displayError(String msg) {
 956         messagePanel.displayError(msg);
 957         onWindowResized(Window.getClientHeight());
 958     }
 959
 960     /**
 961      * Display a warning message.
 962      *
 963      * @param msg the message to display
 964      */
 965     public void displayWarning(String msg) {
 966         messagePanel.displayWarning(msg);
 967         onWindowResized(Window.getClientHeight());
 968     }
 969
 970     /**
 971      * Display an informational message.
 972      *
 973      * @param msg the message to display
 974      */
 975     public void displayInformation(String msg) {
 976         messagePanel.displayInformation(msg);
 977         onWindowResized(Window.getClientHeight());
 978     }
 979
 980     /**
 981      * Retrieve the fileList.
 982      *
 983      * @return the fileList
 984      */
 985     public FileList getFileList() {
 986         return fileList;
 987     }
 988
 989     /**
 990      * Retrieve the topPanel.
 991      *
 992      * @return the topPanel
 993      */
 994     TopPanel getTopPanel() {
 995         return topPanel;
 996     }
 997
 998     /**
 999      * Retrieve the clipboard.
1000      *
1001      * @return the clipboard
1002      */
1003     public Clipboard getClipboard() {
1004         return clipboard;
1005     }
1006
1007     public StatusPanel getStatusPanel() {
1008         return statusPanel;
1009     }
1010
1011     public String getUserToken() {
1012         return userToken;
1013     }
1014
1015     public static native void preventIESelection() /*-{
1016       $doc.body.onselectstart = function () {
1017         return false;
1018       };
1019     }-*/;
1020
1021     public static native void enableIESelection() /*-{
1022       if ($doc.body.onselectstart != null)
1023         $doc.body.onselectstart = null;
1024     }-*/;
1025
1026     /**
1027      * @return the absolute path of the API root URL
1028      */
1029     public String getApiPath() {
1030         Configuration conf = (Configuration) GWT.create(Configuration.class);
1031         return conf.apiPath();
1032     }
1033
1034     /**
1035      * History support for folder navigation
1036      * adds a new browser history entry
1037      *
1038      * @param key
1039      */
1040     public void updateHistory(String key) {
1041 //              Replace any whitespace of the initial string to "+"
1042 //              String result = key.replaceAll("\\s","+");
1043 //              Add a new browser history entry.
1044 //              History.newItem(result);
1045         History.newItem(key);
1046     }
1047
1048     public void deleteFolder(final Folder folder, final Command callback) {
1049         final PleaseWaitPopup pwp = new PleaseWaitPopup();
1050         pwp.center();
1051         String path = "/" + folder.getContainer() + "/" + folder.getPrefix() + "?delimiter=/" + "&t=" + System.currentTimeMillis();
1052         DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), folder.getOwnerID(), path) {
1053
1054             @Override
1055             protected void onUnauthorized(Response response) {
1056                 pwp.hide();
1057                 sessionExpired();
1058             }
1059
1060             @Override
1061             public void onSuccess(Resource result) {
1062                 updateFolder(folder.getParent(), true, new Command() {
1063
1064                     @Override
1065                     public void execute() {
1066                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
1067                         updateStatistics();
1068                         if(callback != null) {
1069                             callback.execute();
1070                         }
1071                         pwp.hide();
1072                     }
1073                 }, true);
1074             }
1075
1076             @Override
1077             public void onError(Throwable t) {
1078                 LOG(t);
1079                 setError(t);
1080                 if(t instanceof RestException) {
1081                     if(((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND) {
1082                         displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());
1083                     }
1084                     else {
1085                         onSuccess(null);
1086                     }
1087                 }
1088                 else {
1089                     displayError("System error unable to delete folder: " + t.getMessage());
1090                 }
1091                 pwp.hide();
1092             }
1093         };
1094         deleteFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1095         Scheduler.get().scheduleDeferred(deleteFolder);
1096     }
1097
1098     public FolderTreeView getFolderTreeView() {
1099         return folderTreeView;
1100     }
1101
1102     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
1103         if(iter.hasNext()) {
1104             File file = iter.next();
1105             String path = targetUri + "/" + file.getName();
1106             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
1107                 @Override
1108                 public void onSuccess(Resource result) {
1109                     copyFiles(iter, targetUsername, targetUri, callback);
1110                 }
1111
1112                 @Override
1113                 public void onError(Throwable t) {
1114                     LOG(t);
1115                     setError(t);
1116                     if(t instanceof RestException) {
1117                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
1118                     }
1119                     else {
1120                         displayError("System error unable to copy file: " + t.getMessage());
1121                     }
1122                 }
1123
1124                 @Override
1125                 protected void onUnauthorized(Response response) {
1126                     sessionExpired();
1127                 }
1128             };
1129             copyFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1130             copyFile.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(file.getUri()));
1131             if(!file.getOwnerID().equals(targetUsername)) {
1132                 copyFile.setHeader(Const.X_SOURCE_ACCOUNT, URL.encodePathSegment(file.getOwnerID()));
1133             }
1134             copyFile.setHeader(Const.CONTENT_TYPE, file.getContentType());
1135             Scheduler.get().scheduleDeferred(copyFile);
1136         }
1137         else if(callback != null) {
1138             callback.execute();
1139         }
1140     }
1141
1142     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, boolean move, final Command callback) {
1143         String path = targetUri + "?delimiter=/";
1144         PutRequest copyFolder = new PutRequest(getApiPath(), targetUsername, path) {
1145             @Override
1146             public void onSuccess(Resource result) {
1147                 if(callback != null) {
1148                     callback.execute();
1149                 }
1150             }
1151
1152             @Override
1153             public void onError(Throwable t) {
1154                 LOG(t);
1155                 setError(t);
1156                 if(t instanceof RestException) {
1157                     displayError("Unable to copy folder: " + ((RestException) t).getHttpStatusText());
1158                 }
1159                 else {
1160                     displayError("System error copying folder: " + t.getMessage());
1161                 }
1162             }
1163
1164             @Override
1165             protected void onUnauthorized(Response response) {
1166                 sessionExpired();
1167             }
1168         };
1169         copyFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1170         copyFolder.setHeader(Const.ACCEPT, "*/*");
1171         copyFolder.setHeader(Const.CONTENT_LENGTH, "0");
1172         copyFolder.setHeader(Const.CONTENT_TYPE, "application/directory");
1173         if(!f.getOwnerID().equals(targetUsername)) {
1174             copyFolder.setHeader(Const.X_SOURCE_ACCOUNT, f.getOwnerID());
1175         }
1176         if(move) {
1177             copyFolder.setHeader(Const.X_MOVE_FROM, URL.encodePathSegment(f.getUri()));
1178         }
1179         else {
1180             copyFolder.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(f.getUri()));
1181         }
1182         Scheduler.get().scheduleDeferred(copyFolder);
1183     }
1184
1185     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1186         selectionModels.add(model);
1187     }
1188
1189     public OtherSharedTreeView getOtherSharedTreeView() {
1190         return otherSharedTreeView;
1191     }
1192
1193     public void updateTrash(boolean showFiles, Command callback) {
1194         updateFolder(trash, showFiles, callback, true);
1195     }
1196
1197     public void updateGroupsNode() {
1198         groupTreeView.updateGroupNode(null);
1199     }
1200
1201     public Group addGroup(String groupname) {
1202         Group newGroup = new Group(groupname);
1203         account.addGroup(newGroup);
1204         groupTreeView.updateGroupNode(null);
1205         return newGroup;
1206     }
1207
1208     public void removeGroup(Group group) {
1209         account.removeGroup(group);
1210         updateGroupsNode();
1211     }
1212
1213     public TreeView getSelectedTree() {
1214         return selectedTree;
1215     }
1216
1217     public void setSelectedTree(TreeView selected) {
1218         selectedTree = selected;
1219     }
1220
1221     public Folder getSelection() {
1222         if(selectedTree != null) {
1223             return selectedTree.getSelection();
1224         }
1225         return null;
1226     }
1227
1228     public void showFolderStatistics(int folderFileCount) {
1229         numOfFiles.setHTML(String.valueOf(folderFileCount));
1230     }
1231
1232     public GroupTreeView getGroupTreeView() {
1233         return groupTreeView;
1234     }
1235
1236     public void sessionExpired() {
1237         new SessionExpiredDialog(this).center();
1238     }
1239
1240     public void updateRootFolder(Command callback) {
1241         updateFolder(account.getPithos(), false, callback, true);
1242     }
1243
1244     void createMySharedTree() {
1245         LOG("Pithos::createMySharedTree()");
1246         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1247         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1248             @Override
1249             public void onSelectionChange(SelectionChangeEvent event) {
1250                 if(mysharedTreeSelectionModel.getSelectedObject() != null) {
1251                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1252                     upload.setEnabled(false);
1253                     disableUploadArea();
1254                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1255                     showRelevantToolbarButtons();
1256                 }
1257                 else {
1258                     if(getSelectedTree().equals(mysharedTreeView)) {
1259                         setSelectedTree(null);
1260                     }
1261                     if(getSelectedTree() == null) {
1262                         showRelevantToolbarButtons();
1263                     }
1264                 }
1265             }
1266         });
1267         selectionModels.add(mysharedTreeSelectionModel);
1268         mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1269         mysharedTreeViewModel.initialize(new Command() {
1270
1271             @Override
1272             public void execute() {
1273                 mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1274                 trees.insert(mysharedTreeView, 2);
1275                 treeViews.add(mysharedTreeView);
1276                 createOtherSharedTree();
1277             }
1278         });
1279     }
1280
1281     void createOtherSharedTree() {
1282         LOG("Pithos::createOtherSharedTree()");
1283         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1284         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1285             @Override
1286             public void onSelectionChange(SelectionChangeEvent event) {
1287                 if(otherSharedTreeSelectionModel.getSelectedObject() != null) {
1288                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1289                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1290                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true, null);
1291                     showRelevantToolbarButtons();
1292                 }
1293                 else {
1294                     if(getSelectedTree().equals(otherSharedTreeView)) {
1295                         setSelectedTree(null);
1296                     }
1297                     if(getSelectedTree() == null) {
1298                         showRelevantToolbarButtons();
1299                     }
1300                 }
1301             }
1302         });
1303         selectionModels.add(otherSharedTreeSelectionModel);
1304         otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1305         LOG("Pithos::createOtherSharedTree(), initializing otherSharedTreeViewModel with a callback");
1306         otherSharedTreeViewModel.initialize(new Command() {
1307             @Override
1308             public void execute() {
1309                 otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1310                 trees.insert(otherSharedTreeView, 1);
1311                 treeViews.add(otherSharedTreeView);
1312                 scheduleResfresh();
1313             }
1314         });
1315     }
1316
1317     public String getErrorData() {
1318         final StringBuilder sb = new StringBuilder();
1319         final String NL = Const.NL;
1320         Throwable t = this.error;
1321         while(t != null) {
1322             sb.append(t.toString());
1323             sb.append(NL);
1324             StackTraceElement[] traces = t.getStackTrace();
1325             for(StackTraceElement trace : traces) {
1326                 sb.append("  [");
1327                 sb.append(trace.getClassName());
1328                 sb.append("::");
1329                 sb.append(trace.getMethodName());
1330                 sb.append("() at ");
1331                 sb.append(trace.getFileName());
1332                 sb.append(":");
1333                 sb.append(trace.getLineNumber());
1334                 sb.append("]");
1335                 sb.append(NL);
1336             }
1337             t = t.getCause();
1338         }
1339
1340         return sb.toString();
1341     }
1342
1343     public void setError(Throwable t) {
1344         error = t;
1345         LOG(t);
1346     }
1347
1348     public void showRelevantToolbarButtons() {
1349         toolbar.showRelevantButtons();
1350     }
1351
1352     public FileUploadDialog getFileUploadDialog() {
1353         if(fileUploadDialog == null) {
1354             fileUploadDialog = new FileUploadDialog(this);
1355         }
1356         return fileUploadDialog;
1357     }
1358
1359     public void hideUploadIndicator() {
1360         upload.removeStyleName("pithos-uploadButton-loading");
1361         upload.setTitle("");
1362     }
1363
1364     public void showUploadIndicator() {
1365         upload.addStyleName("pithos-uploadButton-loading");
1366         upload.setTitle("Upload in progress. Click for details.");
1367     }
1368
1369     public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1370         if(folder == null) {
1371             if(callback != null) {
1372                 callback.execute();
1373             }
1374         }
1375         else {
1376             HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwnerID(), folder.getUri(), folder) {
1377
1378                 @Override
1379                 public void onSuccess(Folder _result) {
1380                     if(callback != null) {
1381                         callback.execute();
1382                     }
1383                 }
1384
1385                 @Override
1386                 public void onError(Throwable t) {
1387                     if(t instanceof RestException) {
1388                         if(((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1389                             final String path = folder.getUri();
1390                             PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwnerID(), path) {
1391                                 @Override
1392                                 public void onSuccess(Resource _result) {
1393                                     scheduleFolderHeadCommand(folder, callback);
1394                                 }
1395
1396                                 @Override
1397                                 public void onError(Throwable _t) {
1398                                     setError(_t);
1399                                     if(_t instanceof RestException) {
1400                                         displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1401                                     }
1402                                     else {
1403                                         displayError("System error creating folder: " + _t.getMessage());
1404                                     }
1405                                 }
1406
1407                                 @Override
1408                                 protected void onUnauthorized(Response response) {
1409                                     sessionExpired();
1410                                 }
1411                             };
1412                             newFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1413                             newFolder.setHeader(Const.CONTENT_TYPE, "application/folder");
1414                             newFolder.setHeader(Const.ACCEPT, "*/*");
1415                             newFolder.setHeader(Const.CONTENT_LENGTH, "0");
1416                             Scheduler.get().scheduleDeferred(newFolder);
1417                         }
1418                         else if(((RestException) t).getHttpStatusCode() == Response.SC_FORBIDDEN) {
1419                             onSuccess(folder);
1420                         }
1421                         else {
1422                             displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1423                         }
1424                     }
1425                     else {
1426                         displayError("System error heading folder: " + t.getMessage());
1427                     }
1428
1429                     LOG("Error heading folder", t);
1430                     setError(t);
1431                 }
1432
1433                 @Override
1434                 protected void onUnauthorized(Response response) {
1435                     sessionExpired();
1436                 }
1437             };
1438             headFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1439             Scheduler.get().scheduleDeferred(headFolder);
1440         }
1441     }
1442
1443     public void scheduleFileHeadCommand(File f, final Command callback) {
1444         HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwnerID(), f.getUri(), f) {
1445
1446             @Override
1447             public void onSuccess(File _result) {
1448                 if(callback != null) {
1449                     callback.execute();
1450                 }
1451             }
1452
1453             @Override
1454             public void onError(Throwable t) {
1455                 LOG("Error heading file", t);
1456                 setError(t);
1457                 if(t instanceof RestException) {
1458                     displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1459                 }
1460                 else {
1461                     displayError("System error heading file: " + t.getMessage());
1462                 }
1463             }
1464
1465             @Override
1466             protected void onUnauthorized(Response response) {
1467                 sessionExpired();
1468             }
1469         };
1470         headFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1471         Scheduler.get().scheduleDeferred(headFile);
1472     }
1473
1474     public boolean isMySharedSelected() {
1475         return getSelectedTree().equals(getMySharedTreeView());
1476     }
1477
1478     private Folder getUploadFolder() {
1479         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1480             return getSelection();
1481         }
1482         return null;
1483     }
1484
1485     private void updateUploadFolder() {
1486         updateUploadFolder(null);
1487     }
1488
1489     private void updateUploadFolder(final JsArrayString urls) {
1490         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1491             Folder f = getSelection();
1492             if(getSelectedTree().equals(getFolderTreeView())) {
1493                 updateFolder(f, true, new Command() {
1494
1495                     @Override
1496                     public void execute() {
1497                         updateStatistics();
1498                         if(urls != null) {
1499                             selectUploadedFiles(urls);
1500                         }
1501                     }
1502                 }, false);
1503             }
1504             else {
1505                 updateOtherSharedFolder(f, true, null);
1506             }
1507         }
1508     }
1509
1510     public native void disableUploadArea() /*-{
1511       var uploader = $wnd.$("#uploader").pluploadQueue();
1512       var dropElm = $wnd.document.getElementById('rightPanel');
1513       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1514     }-*/;
1515
1516     public native void enableUploadArea() /*-{
1517       var uploader = $wnd.$("#uploader").pluploadQueue();
1518       var dropElm = $wnd.document.getElementById('rightPanel');
1519       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1520       if (uploader.runtime == 'html5') {
1521         uploader.settings.drop_element = 'rightPanel';
1522         uploader.trigger('PostInit');
1523       }
1524     }-*/;
1525
1526     public void showUploadAlert(int nOfFiles) {
1527         if(uploadAlert == null) {
1528             uploadAlert = new UploadAlert(this, nOfFiles);
1529         }
1530         if(!uploadAlert.isShowing()) {
1531             uploadAlert.setPopupPositionAndShow(new PopupPanel.PositionCallback() {
1532
1533                 @Override
1534                 public void setPosition(int offsetWidth, int offsetHeight) {
1535                     uploadAlert.setPopupPosition((Window.getClientWidth() - offsetWidth) / 2, statusPanel.getAbsoluteTop() - offsetHeight);
1536                 }
1537             });
1538         }
1539         uploadAlert.setNumOfFiles(nOfFiles);
1540     }
1541
1542     public void hideUploadAlert() {
1543         if(uploadAlert != null && uploadAlert.isShowing()) {
1544             uploadAlert.hide();
1545         }
1546     }
1547
1548     public void selectUploadedFiles(JsArrayString urls) {
1549         List<String> selectedUrls = new ArrayList<String>();
1550         for(int i = 0; i < urls.length(); i++) {
1551             selectedUrls.add(urls.get(i));
1552         }
1553         fileList.selectByUrl(selectedUrls);
1554     }
1555
1556     public void purgeContainer(final Folder container) {
1557         String path = "/" + container.getName() + "?delimiter=/";
1558         DeleteRequest delete = new DeleteRequest(getApiPath(), getUserID(), path) {
1559
1560             @Override
1561             protected void onUnauthorized(Response response) {
1562                 sessionExpired();
1563             }
1564
1565             @Override
1566             public void onSuccess(Resource result) {
1567                 updateFolder(container, true, null, true);
1568             }
1569
1570             @Override
1571             public void onError(Throwable t) {
1572                 LOG("Error deleting trash", t);
1573                 setError(t);
1574                 if(t instanceof RestException) {
1575                     displayError("Error deleting trash: " + ((RestException) t).getHttpStatusText());
1576                 }
1577                 else {
1578                     displayError("System error deleting trash: " + t.getMessage());
1579                 }
1580             }
1581         };
1582         delete.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1583         Scheduler.get().scheduleDeferred(delete);
1584     }
1585 }