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

   1 /*
   2  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35 package gr.grnet.pithos.web.client;
  36
  37 import com.google.gwt.core.client.EntryPoint;
  38 import com.google.gwt.core.client.GWT;
  39 import com.google.gwt.core.client.JsArrayString;
  40 import com.google.gwt.core.client.Scheduler;
  41 import com.google.gwt.core.client.Scheduler.RepeatingCommand;
  42 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  43 import com.google.gwt.event.dom.client.ClickEvent;
  44 import com.google.gwt.event.dom.client.ClickHandler;
  45 import com.google.gwt.event.logical.shared.ResizeEvent;
  46 import com.google.gwt.event.logical.shared.ResizeHandler;
  47 import com.google.gwt.http.client.Response;
  48 import com.google.gwt.http.client.URL;
  49 import com.google.gwt.i18n.client.DateTimeFormat;
  50 import com.google.gwt.i18n.client.Dictionary;
  51 import com.google.gwt.i18n.client.TimeZone;
  52 import com.google.gwt.resources.client.ClientBundle;
  53 import com.google.gwt.resources.client.CssResource;
  54 import com.google.gwt.resources.client.ImageResource;
  55 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  56 import com.google.gwt.user.client.*;
  57 import com.google.gwt.user.client.ui.*;
  58 import com.google.gwt.view.client.SelectionChangeEvent;
  59 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  60 import com.google.gwt.view.client.SingleSelectionModel;
  61 import gr.grnet.pithos.web.client.catalog.UpdateUserCatalogs;
  62 import gr.grnet.pithos.web.client.catalog.UserCatalogs;
  63 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  64 import gr.grnet.pithos.web.client.foldertree.*;
  65 import gr.grnet.pithos.web.client.grouptree.Group;
  66 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  67 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  68 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  69 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  70 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  71 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  72 import gr.grnet.pithos.web.client.rest.*;
  73 import org.apache.http.HttpStatus;
  74
  75 import java.util.*;
  76
  77 /**
  78  * Entry point classes define <code>onModuleLoad()</code>.
  79  */
  80 public class Pithos implements EntryPoint, ResizeHandler {
  81
  82     public static final Configuration config = GWT.create(Configuration.class);
  83
  84     public interface Style extends CssResource {
  85         String commandAnchor();
  86
  87         String statistics();
  88
  89         @ClassName("gwt-HTML")
  90         String html();
  91
  92         String uploadAlert();
  93
  94         String uploadAlertLink();
  95
  96         String uploadAlertProgress();
  97
  98         String uploadAlertPercent();
  99
 100         String uploadAlertClose();
 101     }
 102
 103     public interface Resources extends ClientBundle {
 104         @Source("Pithos.css")
 105         Style pithosCss();
 106
 107         @Source("gr/grnet/pithos/resources/close-popup.png")
 108         ImageResource closePopup();
 109     }
 110
 111     public static Resources resources = GWT.create(Resources.class);
 112
 113     /**
 114      * Instantiate an application-level image bundle. This object will provide
 115      * programmatic access to all the images needed by widgets.
 116      */
 117     static Images images = (Images) GWT.create(Images.class);
 118
 119     public String getUserID() {
 120         return userID;
 121     }
 122
 123     public UserCatalogs getUserCatalogs() {
 124         return userCatalogs;
 125     }
 126
 127     public String getCurrentUserDisplayNameOrID() {
 128         final String displayName = userCatalogs.getDisplayName(getUserID());
 129         return displayName == null ? getUserID() : displayName;
 130     }
 131
 132     public boolean hasUserDisplayNameForID(String userID) {
 133         return userCatalogs.getDisplayName(userID) != null;
 134     }
 135
 136     public String getUserDisplayNameForID(String userID) {
 137         return userCatalogs.getDisplayName(userID);
 138     }
 139
 140     public String getUserIDForDisplayName(String displayName) {
 141         return userCatalogs.getUserID(displayName);
 142     }
 143
 144     public List<String> getUserDisplayNamesForIDs(List<String> userIDs) {
 145         if(userIDs == null) {
 146             userIDs = new ArrayList<String>();
 147         }
 148         final List<String> userDisplayNames = new ArrayList<String>();
 149         for(String userID : userIDs) {
 150             final String displayName = getUserDisplayNameForID(userID);
 151             userDisplayNames.add(displayName);
 152         }
 153
 154         return userDisplayNames;
 155     }
 156
 157     public List<String> filterUserIDsWithUnknownDisplayName(Collection<String> userIDs) {
 158         if(userIDs == null) {
 159             userIDs = new ArrayList<String>();
 160         }
 161         final List<String> filtered = new ArrayList<String>();
 162         for(String userID : userIDs) {
 163             if(!this.userCatalogs.hasID(userID)) {
 164                 filtered.add(userID);
 165             }
 166         }
 167         return filtered;
 168     }
 169
 170     public void setAccount(AccountResource acct) {
 171         account = acct;
 172     }
 173
 174     public AccountResource getAccount() {
 175         return account;
 176     }
 177
 178     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 179         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 180     }
 181
 182     public void updateGroupNode(Group group) {
 183         groupTreeView.updateGroupNode(group);
 184     }
 185
 186     public void updateMySharedRoot() {
 187         mysharedTreeView.updateRoot();
 188     }
 189
 190     public void updateSharedFolder(Folder f, boolean showfiles, Command callback) {
 191         mysharedTreeView.updateFolder(f, showfiles, callback);
 192     }
 193
 194     public void updateSharedFolder(Folder f, boolean showfiles) {
 195         updateSharedFolder(f, showfiles, null);
 196     }
 197
 198     public void updateOtherSharedFolder(Folder f, boolean showfiles, Command callback) {
 199         otherSharedTreeView.updateFolder(f, showfiles, callback);
 200     }
 201
 202     public MysharedTreeView getMySharedTreeView() {
 203         return mysharedTreeView;
 204     }
 205
 206     /**
 207      * An aggregate image bundle that pulls together all the images for this
 208      * application into a single bundle.
 209      */
 210     public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 211
 212         @Source("gr/grnet/pithos/resources/document.png")
 213         ImageResource folders();
 214
 215         @Source("gr/grnet/pithos/resources/advancedsettings.png")
 216         @ImageOptions(width = 32, height = 32)
 217         ImageResource tools();
 218     }
 219
 220     private Throwable error;
 221
 222     /**
 223      * The Application Clipboard implementation;
 224      */
 225     private Clipboard clipboard = new Clipboard();
 226
 227     /**
 228      * The top panel that contains the menu bar.
 229      */
 230     private TopPanel topPanel;
 231
 232     /**
 233      * The panel that contains the various system messages.
 234      */
 235     private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 236
 237     /**
 238      * The bottom panel that contains the status bar.
 239      */
 240     StatusPanel statusPanel = null;
 241
 242     /**
 243      * The file list widget.
 244      */
 245     private FileList fileList;
 246
 247     /**
 248      * The tab panel that occupies the right side of the screen.
 249      */
 250     private VerticalPanel inner = new VerticalPanel();
 251
 252
 253     /**
 254      * The split panel that will contain the left and right panels.
 255      */
 256     private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 257
 258     /**
 259      * The currently selected item in the application, for use by the Edit menu
 260      * commands. Potential types are Folder, File, User and Group.
 261      */
 262     private Object currentSelection;
 263
 264     public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 265
 266     /**
 267      * The ID that uniquely identifies the user in Pithos+.
 268      * Currently this is a UUID. It used to be the user's email.
 269      */
 270     private String userID = null;
 271
 272     /**
 273      * Hold mappings from user UUIDs to emails and vice-versa.
 274      */
 275     private UserCatalogs userCatalogs = new UserCatalogs();
 276
 277     /**
 278      * The authentication token of the current user.
 279      */
 280     private String userToken;
 281
 282     VerticalPanel trees;
 283
 284     SingleSelectionModel<Folder> folderTreeSelectionModel;
 285     FolderTreeViewModel folderTreeViewModel;
 286     FolderTreeView folderTreeView;
 287
 288     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 289     MysharedTreeViewModel mysharedTreeViewModel;
 290     MysharedTreeView mysharedTreeView = null;
 291
 292     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 293     OtherSharedTreeViewModel otherSharedTreeViewModel;
 294     OtherSharedTreeView otherSharedTreeView = null;
 295
 296     GroupTreeViewModel groupTreeViewModel;
 297     GroupTreeView groupTreeView;
 298
 299     TreeView selectedTree;
 300     protected AccountResource account;
 301
 302     Folder trash;
 303
 304     List<Composite> treeViews = new ArrayList<Composite>();
 305
 306     @SuppressWarnings("rawtypes")
 307     List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 308
 309     public Button upload;
 310
 311     private HTML numOfFiles;
 312
 313     private Toolbar toolbar;
 314
 315     private FileUploadDialog fileUploadDialog = new FileUploadDialog(this);
 316
 317     UploadAlert uploadAlert;
 318
 319     Date lastModified;
 320
 321     @Override
 322     public void onModuleLoad() {
 323         if(parseUserCredentials()) {
 324             initialize();
 325         }
 326     }
 327
 328     static native void __ConsoleLog(String message) /*-{
 329       try {
 330         console.log(message);
 331       } catch (e) {
 332       }
 333     }-*/;
 334
 335     public static void LOG(String ...args) {
 336         final StringBuilder sb = new StringBuilder();
 337         for(String arg : args) {
 338             sb.append(arg);
 339         }
 340         if(sb.length() > 0) {
 341             __ConsoleLog(sb.toString());
 342         }
 343     }
 344
 345     private void initialize() {
 346         lastModified = new Date(); //Initialize if-modified-since value with now.
 347         resources.pithosCss().ensureInjected();
 348         boolean bareContent = Window.Location.getParameter("noframe") != null;
 349         String contentWidth = bareContent ? Const.PERCENT_100 : "75%";
 350
 351         VerticalPanel outer = new VerticalPanel();
 352         outer.setWidth(Const.PERCENT_100);
 353         if(!bareContent) {
 354             outer.addStyleName("pithos-outer");
 355         }
 356
 357         if(!bareContent) {
 358             topPanel = new TopPanel(this, Pithos.images);
 359             topPanel.setWidth(Const.PERCENT_100);
 360             outer.add(topPanel);
 361             outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 362         }
 363
 364         messagePanel.setVisible(false);
 365         outer.add(messagePanel);
 366         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 367         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 368
 369         HorizontalPanel header = new HorizontalPanel();
 370         header.addStyleName("pithos-header");
 371         header.setWidth(contentWidth);
 372         if(bareContent) {
 373             header.addStyleName("pithos-header-noframe");
 374         }
 375         upload = new Button("Upload", new ClickHandler() {
 376             @Override
 377             public void onClick(ClickEvent event) {
 378                 if(getSelection() != null) {
 379                     new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 380                 }
 381             }
 382         });
 383         upload.addStyleName("pithos-uploadButton");
 384         header.add(upload);
 385         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 386         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 387
 388         toolbar = new Toolbar(this);
 389         header.add(toolbar);
 390         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 391         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 392
 393         HorizontalPanel folderStatistics = new HorizontalPanel();
 394         folderStatistics.addStyleName("pithos-folderStatistics");
 395         numOfFiles = new HTML();
 396         folderStatistics.add(numOfFiles);
 397         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 398         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 399         folderStatistics.add(numOfFilesLabel);
 400         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 401         header.add(folderStatistics);
 402         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 403         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 404         header.setCellWidth(folderStatistics, "40px");
 405         outer.add(header);
 406         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 407         // Inner contains the various lists
 408         inner.sinkEvents(Event.ONCONTEXTMENU);
 409         inner.setWidth(Const.PERCENT_100);
 410
 411         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 412         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 413             @Override
 414             public void onSelectionChange(SelectionChangeEvent event) {
 415                 if(folderTreeSelectionModel.getSelectedObject() != null) {
 416                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 417                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 418                     Folder f = folderTreeSelectionModel.getSelectedObject();
 419                     updateFolder(f, true, new Command() {
 420
 421                         @Override
 422                         public void execute() {
 423                             updateStatistics();
 424                         }
 425                     }, true);
 426                     showRelevantToolbarButtons();
 427                 }
 428                 else {
 429                     if(getSelectedTree().equals(folderTreeView)) {
 430                         setSelectedTree(null);
 431                     }
 432                     if(getSelectedTree() == null) {
 433                         showRelevantToolbarButtons();
 434                     }
 435                 }
 436             }
 437         });
 438         selectionModels.add(folderTreeSelectionModel);
 439
 440         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 441         folderTreeView = new FolderTreeView(folderTreeViewModel);
 442         treeViews.add(folderTreeView);
 443
 444         fileList = new FileList(this, images);
 445         inner.add(fileList);
 446
 447         trees = new VerticalPanel();
 448         trees.setWidth(Const.PERCENT_100);
 449
 450         // Add the left and right panels to the split panel.
 451         splitPanel.setLeftWidget(trees);
 452         FlowPanel right = new FlowPanel();
 453         right.getElement().setId("rightPanel");
 454         right.add(inner);
 455         splitPanel.setRightWidget(right);
 456         splitPanel.setSplitPosition("219px");
 457         splitPanel.setSize(Const.PERCENT_100, Const.PERCENT_100);
 458         splitPanel.addStyleName("pithos-splitPanel");
 459         splitPanel.setWidth(contentWidth);
 460         outer.add(splitPanel);
 461         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 462
 463         if(!bareContent) {
 464             statusPanel = new StatusPanel();
 465             statusPanel.setWidth(Const.PERCENT_100);
 466             outer.add(statusPanel);
 467             outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 468         }
 469         else {
 470             splitPanel.addStyleName("pithos-splitPanel-noframe");
 471         }
 472
 473         // Hook the window resize event, so that we can adjust the UI.
 474         Window.addResizeHandler(this);
 475         // Clear out the window's built-in margin, because we want to take
 476         // advantage of the entire client area.
 477         Window.setMargin("0px");
 478         // Finally, add the outer panel to the RootPanel, so that it will be
 479         // displayed.
 480         RootPanel.get().add(outer);
 481         // Call the window resized handler to get the initial sizes setup. Doing
 482         // this in a deferred command causes it to occur after all widgets'
 483         // sizes have been computed by the browser.
 484         Scheduler.get().scheduleIncremental(new RepeatingCommand() {
 485
 486             @Override
 487             public boolean execute() {
 488                 if(!isCloudbarReady()) {
 489                     return true;
 490                 }
 491                 onWindowResized(Window.getClientHeight());
 492                 return false;
 493             }
 494         });
 495
 496         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 497             @Override
 498             public void execute() {
 499                 fetchAccount(new Command() {
 500
 501                     @Override
 502                     public void execute() {
 503                         if(!account.hasHomeContainer()) {
 504                             createHomeContainer(account, this);
 505                         }
 506                         else if(!account.hasTrashContainer()) {
 507                             createTrashContainer(this);
 508                         }
 509                         else {
 510                             for(Folder f : account.getContainers()) {
 511                                 if(f.getName().equals(Const.TRASH_CONTAINER)) {
 512                                     trash = f;
 513                                     break;
 514                                 }
 515                             }
 516                             trees.add(folderTreeView);
 517                             folderTreeViewModel.initialize(account, new Command() {
 518
 519                                 @Override
 520                                 public void execute() {
 521                                     createMySharedTree();
 522                                 }
 523                             });
 524
 525                             HorizontalPanel separator = new HorizontalPanel();
 526                             separator.addStyleName("pithos-statisticsSeparator");
 527                             separator.add(new HTML(""));
 528                             trees.add(separator);
 529
 530                             groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 531                             groupTreeView = new GroupTreeView(groupTreeViewModel);
 532                             treeViews.add(groupTreeView);
 533                             trees.add(groupTreeView);
 534                             folderTreeView.showStatistics(account);
 535                         }
 536                     }
 537                 });
 538             }
 539         });
 540     }
 541
 542     public void scheduleResfresh() {
 543         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 544
 545             @Override
 546             public boolean execute() {
 547                 final Folder f = getSelection();
 548                 if(f == null) {
 549                     return true;
 550                 }
 551
 552                 HeadRequest<Folder> head = new HeadRequest<Folder>(Folder.class, getApiPath(), f.getOwnerID(), "/" + f.getContainer()) {
 553
 554                     @Override
 555                     public void onSuccess(Folder _result) {
 556                         lastModified = new Date();
 557                         if(getSelectedTree().equals(folderTreeView)) {
 558                             updateFolder(f, true, new Command() {
 559
 560                                 @Override
 561                                 public void execute() {
 562                                     scheduleResfresh();
 563                                 }
 564
 565                             }, false);
 566                         }
 567                         else if(getSelectedTree().equals(mysharedTreeView)) {
 568                             updateSharedFolder(f, true, new Command() {
 569
 570                                 @Override
 571                                 public void execute() {
 572                                     scheduleResfresh();
 573                                 }
 574                             });
 575                         }
 576                         else {
 577                             scheduleResfresh();
 578                         }
 579                     }
 580
 581                     @Override
 582                     public void onError(Throwable t) {
 583                         if(t instanceof RestException && ((RestException) t).getHttpStatusCode() == HttpStatus.SC_NOT_MODIFIED) {
 584                             scheduleResfresh();
 585                         }
 586                         else if(retries >= MAX_RETRIES) {
 587                             GWT.log("Error heading folder", t);
 588                             setError(t);
 589                             if(t instanceof RestException) {
 590                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
 591                             }
 592                             else {
 593                                 displayError("System error heading folder: " + t.getMessage());
 594                             }
 595                         }
 596                         else {//retry
 597                             GWT.log("Retry " + retries);
 598                             Scheduler.get().scheduleDeferred(this);
 599                         }
 600                     }
 601
 602                     @Override
 603                     protected void onUnauthorized(Response response) {
 604                         if(retries >= MAX_RETRIES) {
 605                             sessionExpired();
 606                         }
 607                         else //retry
 608                         {
 609                             Scheduler.get().scheduleDeferred(this);
 610                         }
 611                     }
 612                 };
 613                 head.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 614                 head.setHeader(Const.IF_MODIFIED_SINCE, DateTimeFormat.getFormat(Const.DATE_FORMAT_1).format(lastModified, TimeZone.createTimeZone(0)) + " GMT");
 615                 Scheduler.get().scheduleDeferred(head);
 616
 617                 return false;
 618             }
 619         }, 3000);
 620     }
 621
 622     public void applyPermissions(Folder f) {
 623         if(f != null) {
 624             if(f.isInTrash()) {
 625                 upload.setEnabled(false);
 626                 disableUploadArea();
 627             }
 628             else {
 629                 Boolean[] perms = f.getPermissions().get(userID);
 630                 if(f.getOwnerID().equals(userID) || (perms != null && perms[1] != null && perms[1])) {
 631                     upload.setEnabled(true);
 632                     enableUploadArea();
 633                 }
 634                 else {
 635                     upload.setEnabled(false);
 636                     disableUploadArea();
 637                 }
 638             }
 639         }
 640         else {
 641             upload.setEnabled(false);
 642             disableUploadArea();
 643         }
 644     }
 645
 646     @SuppressWarnings({"rawtypes", "unchecked"})
 647     public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 648         selectedTree = _selectedTree;
 649
 650         for(SingleSelectionModel s : selectionModels) {
 651             if(!s.equals(model) && s.getSelectedObject() != null) {
 652                 s.setSelected(s.getSelectedObject(), false);
 653             }
 654         }
 655     }
 656
 657     public void showFiles(final Folder f) {
 658         Set<File> files = f.getFiles();
 659         showFiles(files);
 660     }
 661
 662     public void showFiles(Set<File> files) {
 663         fileList.setFiles(new ArrayList<File>(files));
 664     }
 665
 666     /**
 667      * Parse and store the user credentials to the appropriate fields.
 668      */
 669     private boolean parseUserCredentials() {
 670         Configuration conf = (Configuration) GWT.create(Configuration.class);
 671         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 672         String cookie = otherProperties.get(Const.AUTH_COOKIE);
 673         String auth = Cookies.getCookie(cookie);
 674         if(auth == null) {
 675             authenticateUser();
 676             return false;
 677         }
 678         if(auth.startsWith("\"")) {
 679             auth = auth.substring(1);
 680         }
 681         if(auth.endsWith("\"")) {
 682             auth = auth.substring(0, auth.length() - 1);
 683         }
 684         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 685         if(authSplit.length != 2) {
 686             authenticateUser();
 687             return false;
 688         }
 689         userID = authSplit[0];
 690         userToken = authSplit[1];
 691
 692         String gotoUrl = Window.Location.getParameter("goto");
 693         if(gotoUrl != null && gotoUrl.length() > 0) {
 694             Window.Location.assign(gotoUrl);
 695             return false;
 696         }
 697         return true;
 698     }
 699
 700     /**
 701      * Redirect the user to the login page for authentication.
 702      */
 703     protected void authenticateUser() {
 704         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 705         Window.Location.assign(otherProperties.get(Const.LOGIN_URL) + Window.Location.getHref());
 706     }
 707
 708     public void fetchAccount(final Command callback) {
 709         String path = "?format=json";
 710
 711         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), userID, path) {
 712             @Override
 713             public void onSuccess(AccountResource _result) {
 714                 account = _result;
 715                 if(callback != null) {
 716                     callback.execute();
 717                 }
 718                 // Initialize the user catalog
 719                 new UpdateUserCatalogs(Pithos.this, Pithos.this.getUserID()).scheduleDeferred();
 720             }
 721
 722             @Override
 723             public void onError(Throwable t) {
 724                 GWT.log("Error getting account", t);
 725                 setError(t);
 726                 if(t instanceof RestException) {
 727                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 728                 }
 729                 else {
 730                     displayError("System error fetching user data: " + t.getMessage());
 731                 }
 732             }
 733
 734             @Override
 735             protected void onUnauthorized(Response response) {
 736                 sessionExpired();
 737             }
 738         };
 739         getAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 740         Scheduler.get().scheduleDeferred(getAccount);
 741     }
 742
 743     public void updateStatistics() {
 744         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), userID, "", account) {
 745
 746             @Override
 747             public void onSuccess(AccountResource _result) {
 748                 folderTreeView.showStatistics(account);
 749             }
 750
 751             @Override
 752             public void onError(Throwable t) {
 753                 GWT.log("Error getting account", t);
 754                 setError(t);
 755                 if(t instanceof RestException) {
 756                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 757                 }
 758                 else {
 759                     displayError("System error fetching user data: " + t.getMessage());
 760                 }
 761             }
 762
 763             @Override
 764             protected void onUnauthorized(Response response) {
 765                 sessionExpired();
 766             }
 767         };
 768         headAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 769         Scheduler.get().scheduleDeferred(headAccount);
 770     }
 771
 772     protected void createHomeContainer(final AccountResource _account, final Command callback) {
 773         String path = "/" + Const.HOME_CONTAINER;
 774         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 775             @Override
 776             public void onSuccess(Resource result) {
 777                 if(!_account.hasTrashContainer()) {
 778                     createTrashContainer(callback);
 779                 }
 780                 else {
 781                     fetchAccount(callback);
 782                 }
 783             }
 784
 785             @Override
 786             public void onError(Throwable t) {
 787                 GWT.log("Error creating pithos", t);
 788                 setError(t);
 789                 if(t instanceof RestException) {
 790                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 791                 }
 792                 else {
 793                     displayError("System error Error creating pithos: " + t.getMessage());
 794                 }
 795             }
 796
 797             @Override
 798             protected void onUnauthorized(Response response) {
 799                 sessionExpired();
 800             }
 801         };
 802         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 803         Scheduler.get().scheduleDeferred(createPithos);
 804     }
 805
 806     protected void createTrashContainer(final Command callback) {
 807         String path = "/" + Const.TRASH_CONTAINER;
 808         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 809             @Override
 810             public void onSuccess(Resource result) {
 811                 fetchAccount(callback);
 812             }
 813
 814             @Override
 815             public void onError(Throwable t) {
 816                 GWT.log("Error creating pithos", t);
 817                 setError(t);
 818                 if(t instanceof RestException) {
 819                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 820                 }
 821                 else {
 822                     displayError("System error Error creating pithos: " + t.getMessage());
 823                 }
 824             }
 825
 826             @Override
 827             protected void onUnauthorized(Response response) {
 828                 sessionExpired();
 829             }
 830         };
 831         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 832         Scheduler.get().scheduleDeferred(createPithos);
 833     }
 834
 835     /**
 836      * Creates an HTML fragment that places an image & caption together, for use
 837      * in a group header.
 838      *
 839      * @param imageProto an image prototype for an image
 840      * @param caption    the group caption
 841      * @return the header HTML fragment
 842      */
 843     private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 844         String captionHTML = "<table class='caption' cellpadding='0' "
 845             + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 846             + "</td><td id =" + caption + " class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 847             + caption + "</b></td></tr></table>";
 848         return captionHTML;
 849     }
 850
 851     protected void onWindowResized(int height) {
 852         // Adjust the split panel to take up the available room in the window.
 853         int newHeight = height - splitPanel.getAbsoluteTop() - 153;
 854         if(newHeight < 1) {
 855             newHeight = 1;
 856         }
 857         splitPanel.setHeight("" + newHeight);
 858         inner.setHeight("" + newHeight);
 859     }
 860
 861     native boolean isCloudbarReady()/*-{
 862       if ($wnd.$("div.cloudbar") && $wnd.$("div.cloudbar").height() > 0)
 863         return true;
 864       return false;
 865     }-*/;
 866
 867     @Override
 868     public void onResize(ResizeEvent event) {
 869         int height = event.getHeight();
 870         onWindowResized(height);
 871     }
 872
 873     /**
 874      * Display an error message.
 875      *
 876      * @param msg the message to display
 877      */
 878     public void displayError(String msg) {
 879         messagePanel.displayError(msg);
 880         onWindowResized(Window.getClientHeight());
 881     }
 882
 883     /**
 884      * Display a warning message.
 885      *
 886      * @param msg the message to display
 887      */
 888     public void displayWarning(String msg) {
 889         messagePanel.displayWarning(msg);
 890         onWindowResized(Window.getClientHeight());
 891     }
 892
 893     /**
 894      * Display an informational message.
 895      *
 896      * @param msg the message to display
 897      */
 898     public void displayInformation(String msg) {
 899         messagePanel.displayInformation(msg);
 900         onWindowResized(Window.getClientHeight());
 901     }
 902
 903     /**
 904      * Retrieve the fileList.
 905      *
 906      * @return the fileList
 907      */
 908     public FileList getFileList() {
 909         return fileList;
 910     }
 911
 912     /**
 913      * Retrieve the topPanel.
 914      *
 915      * @return the topPanel
 916      */
 917     TopPanel getTopPanel() {
 918         return topPanel;
 919     }
 920
 921     /**
 922      * Retrieve the clipboard.
 923      *
 924      * @return the clipboard
 925      */
 926     public Clipboard getClipboard() {
 927         return clipboard;
 928     }
 929
 930     public StatusPanel getStatusPanel() {
 931         return statusPanel;
 932     }
 933
 934     public String getUserToken() {
 935         return userToken;
 936     }
 937
 938     public static native void preventIESelection() /*-{
 939       $doc.body.onselectstart = function () {
 940         return false;
 941       };
 942     }-*/;
 943
 944     public static native void enableIESelection() /*-{
 945       if ($doc.body.onselectstart != null)
 946         $doc.body.onselectstart = null;
 947     }-*/;
 948
 949     /**
 950      * @return the absolute path of the API root URL
 951      */
 952     public String getApiPath() {
 953         Configuration conf = (Configuration) GWT.create(Configuration.class);
 954         return conf.apiPath();
 955     }
 956
 957     /**
 958      * History support for folder navigation
 959      * adds a new browser history entry
 960      *
 961      * @param key
 962      */
 963     public void updateHistory(String key) {
 964 //              Replace any whitespace of the initial string to "+"
 965 //              String result = key.replaceAll("\\s","+");
 966 //              Add a new browser history entry.
 967 //              History.newItem(result);
 968         History.newItem(key);
 969     }
 970
 971     public void deleteFolder(final Folder folder, final Command callback) {
 972         final PleaseWaitPopup pwp = new PleaseWaitPopup();
 973         pwp.center();
 974         String path = "/" + folder.getContainer() + "/" + folder.getPrefix() + "?delimiter=/" + "&t=" + System.currentTimeMillis();
 975         DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), folder.getOwnerID(), path) {
 976
 977             @Override
 978             protected void onUnauthorized(Response response) {
 979                 pwp.hide();
 980                 sessionExpired();
 981             }
 982
 983             @Override
 984             public void onSuccess(Resource result) {
 985                 updateFolder(folder.getParent(), true, new Command() {
 986
 987                     @Override
 988                     public void execute() {
 989                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
 990                         updateStatistics();
 991                         if(callback != null) {
 992                             callback.execute();
 993                         }
 994                         pwp.hide();
 995                     }
 996                 }, true);
 997             }
 998
 999             @Override
1000             public void onError(Throwable t) {
1001                 GWT.log("", t);
1002                 setError(t);
1003                 if(t instanceof RestException) {
1004                     if(((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND) {
1005                         displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());
1006                     }
1007                     else {
1008                         onSuccess(null);
1009                     }
1010                 }
1011                 else {
1012                     displayError("System error unable to delete folder: " + t.getMessage());
1013                 }
1014                 pwp.hide();
1015             }
1016         };
1017         deleteFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1018         Scheduler.get().scheduleDeferred(deleteFolder);
1019     }
1020
1021     public FolderTreeView getFolderTreeView() {
1022         return folderTreeView;
1023     }
1024
1025     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
1026         if(iter.hasNext()) {
1027             File file = iter.next();
1028             String path = targetUri + "/" + file.getName();
1029             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
1030                 @Override
1031                 public void onSuccess(Resource result) {
1032                     copyFiles(iter, targetUsername, targetUri, callback);
1033                 }
1034
1035                 @Override
1036                 public void onError(Throwable t) {
1037                     GWT.log("", t);
1038                     setError(t);
1039                     if(t instanceof RestException) {
1040                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
1041                     }
1042                     else {
1043                         displayError("System error unable to copy file: " + t.getMessage());
1044                     }
1045                 }
1046
1047                 @Override
1048                 protected void onUnauthorized(Response response) {
1049                     sessionExpired();
1050                 }
1051             };
1052             copyFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1053             copyFile.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(file.getUri()));
1054             if(!file.getOwnerID().equals(targetUsername)) {
1055                 copyFile.setHeader(Const.X_SOURCE_ACCOUNT, URL.encodePathSegment(file.getOwnerID()));
1056             }
1057             copyFile.setHeader(Const.CONTENT_TYPE, file.getContentType());
1058             Scheduler.get().scheduleDeferred(copyFile);
1059         }
1060         else if(callback != null) {
1061             callback.execute();
1062         }
1063     }
1064
1065     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, boolean move, final Command callback) {
1066         String path = targetUri + "?delimiter=/";
1067         PutRequest copyFolder = new PutRequest(getApiPath(), targetUsername, path) {
1068             @Override
1069             public void onSuccess(Resource result) {
1070                 if(callback != null) {
1071                     callback.execute();
1072                 }
1073             }
1074
1075             @Override
1076             public void onError(Throwable t) {
1077                 GWT.log("", t);
1078                 setError(t);
1079                 if(t instanceof RestException) {
1080                     displayError("Unable to copy folder: " + ((RestException) t).getHttpStatusText());
1081                 }
1082                 else {
1083                     displayError("System error copying folder: " + t.getMessage());
1084                 }
1085             }
1086
1087             @Override
1088             protected void onUnauthorized(Response response) {
1089                 sessionExpired();
1090             }
1091         };
1092         copyFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1093         copyFolder.setHeader(Const.ACCEPT, "*/*");
1094         copyFolder.setHeader(Const.CONTENT_LENGTH, "0");
1095         copyFolder.setHeader(Const.CONTENT_TYPE, "application/directory");
1096         if(!f.getOwnerID().equals(targetUsername)) {
1097             copyFolder.setHeader(Const.X_SOURCE_ACCOUNT, f.getOwnerID());
1098         }
1099         if(move) {
1100             copyFolder.setHeader(Const.X_MOVE_FROM, URL.encodePathSegment(f.getUri()));
1101         }
1102         else {
1103             copyFolder.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(f.getUri()));
1104         }
1105         Scheduler.get().scheduleDeferred(copyFolder);
1106     }
1107
1108     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1109         selectionModels.add(model);
1110     }
1111
1112     public OtherSharedTreeView getOtherSharedTreeView() {
1113         return otherSharedTreeView;
1114     }
1115
1116     public void updateTrash(boolean showFiles, Command callback) {
1117         updateFolder(trash, showFiles, callback, true);
1118     }
1119
1120     public void updateGroupsNode() {
1121         groupTreeView.updateGroupNode(null);
1122     }
1123
1124     public Group addGroup(String groupname) {
1125         Group newGroup = new Group(groupname);
1126         account.addGroup(newGroup);
1127         groupTreeView.updateGroupNode(null);
1128         return newGroup;
1129     }
1130
1131     public void removeGroup(Group group) {
1132         account.removeGroup(group);
1133         updateGroupsNode();
1134     }
1135
1136     public TreeView getSelectedTree() {
1137         return selectedTree;
1138     }
1139
1140     public void setSelectedTree(TreeView selected) {
1141         selectedTree = selected;
1142     }
1143
1144     public Folder getSelection() {
1145         if(selectedTree != null) {
1146             return selectedTree.getSelection();
1147         }
1148         return null;
1149     }
1150
1151     public void showFolderStatistics(int folderFileCount) {
1152         numOfFiles.setHTML(String.valueOf(folderFileCount));
1153     }
1154
1155     public GroupTreeView getGroupTreeView() {
1156         return groupTreeView;
1157     }
1158
1159     public void sessionExpired() {
1160         new SessionExpiredDialog(this).center();
1161     }
1162
1163     public void updateRootFolder(Command callback) {
1164         updateFolder(account.getPithos(), false, callback, true);
1165     }
1166
1167     void createMySharedTree() {
1168         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1169         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1170             @Override
1171             public void onSelectionChange(SelectionChangeEvent event) {
1172                 if(mysharedTreeSelectionModel.getSelectedObject() != null) {
1173                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1174                     upload.setEnabled(false);
1175                     disableUploadArea();
1176                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1177                     showRelevantToolbarButtons();
1178                 }
1179                 else {
1180                     if(getSelectedTree().equals(mysharedTreeView)) {
1181                         setSelectedTree(null);
1182                     }
1183                     if(getSelectedTree() == null) {
1184                         showRelevantToolbarButtons();
1185                     }
1186                 }
1187             }
1188         });
1189         selectionModels.add(mysharedTreeSelectionModel);
1190         mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1191         mysharedTreeViewModel.initialize(new Command() {
1192
1193             @Override
1194             public void execute() {
1195                 mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1196                 trees.insert(mysharedTreeView, 2);
1197                 treeViews.add(mysharedTreeView);
1198                 createOtherSharedTree();
1199             }
1200         });
1201     }
1202
1203     void createOtherSharedTree() {
1204         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1205         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1206             @Override
1207             public void onSelectionChange(SelectionChangeEvent event) {
1208                 if(otherSharedTreeSelectionModel.getSelectedObject() != null) {
1209                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1210                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1211                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true, null);
1212                     showRelevantToolbarButtons();
1213                 }
1214                 else {
1215                     if(getSelectedTree().equals(otherSharedTreeView)) {
1216                         setSelectedTree(null);
1217                     }
1218                     if(getSelectedTree() == null) {
1219                         showRelevantToolbarButtons();
1220                     }
1221                 }
1222             }
1223         });
1224         selectionModels.add(otherSharedTreeSelectionModel);
1225         otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1226         otherSharedTreeViewModel.initialize(new Command() {
1227
1228             @Override
1229             public void execute() {
1230                 otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1231                 trees.insert(otherSharedTreeView, 1);
1232                 treeViews.add(otherSharedTreeView);
1233                 scheduleResfresh();
1234             }
1235         });
1236     }
1237
1238     public native void log1(String message)/*-{
1239       $wnd.console.log(message);
1240     }-*/;
1241
1242     public String getErrorData() {
1243         if(error != null) {
1244             return error.toString();
1245         }
1246         return "";
1247     }
1248
1249     public void setError(Throwable t) {
1250         error = t;
1251     }
1252
1253     public void showRelevantToolbarButtons() {
1254         toolbar.showRelevantButtons();
1255     }
1256
1257     public FileUploadDialog getFileUploadDialog() {
1258         if(fileUploadDialog == null) {
1259             fileUploadDialog = new FileUploadDialog(this);
1260         }
1261         return fileUploadDialog;
1262     }
1263
1264     public void hideUploadIndicator() {
1265         upload.removeStyleName("pithos-uploadButton-loading");
1266         upload.setTitle("");
1267     }
1268
1269     public void showUploadIndicator() {
1270         upload.addStyleName("pithos-uploadButton-loading");
1271         upload.setTitle("Upload in progress. Click for details.");
1272     }
1273
1274     public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1275         if(folder == null) {
1276             if(callback != null) {
1277                 callback.execute();
1278             }
1279         }
1280         else {
1281             HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwnerID(), folder.getUri(), folder) {
1282
1283                 @Override
1284                 public void onSuccess(Folder _result) {
1285                     if(callback != null) {
1286                         callback.execute();
1287                     }
1288                 }
1289
1290                 @Override
1291                 public void onError(Throwable t) {
1292                     if(t instanceof RestException) {
1293                         if(((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1294                             final String path = folder.getUri();
1295                             PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwnerID(), path) {
1296                                 @Override
1297                                 public void onSuccess(Resource _result) {
1298                                     scheduleFolderHeadCommand(folder, callback);
1299                                 }
1300
1301                                 @Override
1302                                 public void onError(Throwable _t) {
1303                                     GWT.log("", _t);
1304                                     setError(_t);
1305                                     if(_t instanceof RestException) {
1306                                         displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1307                                     }
1308                                     else {
1309                                         displayError("System error creating folder: " + _t.getMessage());
1310                                     }
1311                                 }
1312
1313                                 @Override
1314                                 protected void onUnauthorized(Response response) {
1315                                     sessionExpired();
1316                                 }
1317                             };
1318                             newFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1319                             newFolder.setHeader(Const.CONTENT_TYPE, "application/folder");
1320                             newFolder.setHeader(Const.ACCEPT, "*/*");
1321                             newFolder.setHeader(Const.CONTENT_LENGTH, "0");
1322                             Scheduler.get().scheduleDeferred(newFolder);
1323                         }
1324                         else if(((RestException) t).getHttpStatusCode() == Response.SC_FORBIDDEN) {
1325                             onSuccess(folder);
1326                         }
1327                         else {
1328                             displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1329                         }
1330                     }
1331                     else {
1332                         displayError("System error heading folder: " + t.getMessage());
1333                     }
1334
1335                     GWT.log("Error heading folder", t);
1336                     setError(t);
1337                 }
1338
1339                 @Override
1340                 protected void onUnauthorized(Response response) {
1341                     sessionExpired();
1342                 }
1343             };
1344             headFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1345             Scheduler.get().scheduleDeferred(headFolder);
1346         }
1347     }
1348
1349     public void scheduleFileHeadCommand(File f, final Command callback) {
1350         HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwnerID(), f.getUri(), f) {
1351
1352             @Override
1353             public void onSuccess(File _result) {
1354                 if(callback != null) {
1355                     callback.execute();
1356                 }
1357             }
1358
1359             @Override
1360             public void onError(Throwable t) {
1361                 GWT.log("Error heading file", t);
1362                 setError(t);
1363                 if(t instanceof RestException) {
1364                     displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1365                 }
1366                 else {
1367                     displayError("System error heading file: " + t.getMessage());
1368                 }
1369             }
1370
1371             @Override
1372             protected void onUnauthorized(Response response) {
1373                 sessionExpired();
1374             }
1375         };
1376         headFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1377         Scheduler.get().scheduleDeferred(headFile);
1378     }
1379
1380     public boolean isMySharedSelected() {
1381         return getSelectedTree().equals(getMySharedTreeView());
1382     }
1383
1384     private Folder getUploadFolder() {
1385         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1386             return getSelection();
1387         }
1388         return null;
1389     }
1390
1391     private void updateUploadFolder() {
1392         updateUploadFolder(null);
1393     }
1394
1395     private void updateUploadFolder(final JsArrayString urls) {
1396         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1397             Folder f = getSelection();
1398             if(getSelectedTree().equals(getFolderTreeView())) {
1399                 updateFolder(f, true, new Command() {
1400
1401                     @Override
1402                     public void execute() {
1403                         updateStatistics();
1404                         if(urls != null) {
1405                             selectUploadedFiles(urls);
1406                         }
1407                     }
1408                 }, false);
1409             }
1410             else {
1411                 updateOtherSharedFolder(f, true, null);
1412             }
1413         }
1414     }
1415
1416     public native void disableUploadArea() /*-{
1417       var uploader = $wnd.$("#uploader").pluploadQueue();
1418       var dropElm = $wnd.document.getElementById('rightPanel');
1419       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1420     }-*/;
1421
1422     public native void enableUploadArea() /*-{
1423       var uploader = $wnd.$("#uploader").pluploadQueue();
1424       var dropElm = $wnd.document.getElementById('rightPanel');
1425       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1426       if (uploader.runtime == 'html5') {
1427         uploader.settings.drop_element = 'rightPanel';
1428         uploader.trigger('PostInit');
1429       }
1430     }-*/;
1431
1432     public void showUploadAlert(int nOfFiles) {
1433         if(uploadAlert == null) {
1434             uploadAlert = new UploadAlert(this, nOfFiles);
1435         }
1436         if(!uploadAlert.isShowing()) {
1437             uploadAlert.setPopupPositionAndShow(new PopupPanel.PositionCallback() {
1438
1439                 @Override
1440                 public void setPosition(int offsetWidth, int offsetHeight) {
1441                     uploadAlert.setPopupPosition((Window.getClientWidth() - offsetWidth) / 2, statusPanel.getAbsoluteTop() - offsetHeight);
1442                 }
1443             });
1444         }
1445         uploadAlert.setNumOfFiles(nOfFiles);
1446     }
1447
1448     public void hideUploadAlert() {
1449         if(uploadAlert != null && uploadAlert.isShowing()) {
1450             uploadAlert.hide();
1451         }
1452     }
1453
1454     public void selectUploadedFiles(JsArrayString urls) {
1455         List<String> selectedUrls = new ArrayList<String>();
1456         for(int i = 0; i < urls.length(); i++) {
1457             selectedUrls.add(urls.get(i));
1458         }
1459         fileList.selectByUrl(selectedUrls);
1460     }
1461
1462     public void emptyContainer(final Folder container) {
1463         String path = "/" + container.getName() + "?delimiter=/";
1464         DeleteRequest delete = new DeleteRequest(getApiPath(), getUserID(), path) {
1465
1466             @Override
1467             protected void onUnauthorized(Response response) {
1468                 sessionExpired();
1469             }
1470
1471             @Override
1472             public void onSuccess(Resource result) {
1473                 updateFolder(container, true, null, true);
1474             }
1475
1476             @Override
1477             public void onError(Throwable t) {
1478                 GWT.log("Error deleting trash", t);
1479                 setError(t);
1480                 if(t instanceof RestException) {
1481                     displayError("Error deleting trash: " + ((RestException) t).getHttpStatusText());
1482                 }
1483                 else {
1484                     displayError("System error deleting trash: " + t.getMessage());
1485                 }
1486             }
1487         };
1488         delete.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1489         Scheduler.get().scheduleDeferred(delete);
1490     }
1491 }