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 gr.grnet.pithos.web.client.PithosDisclosurePanel.Style;
  38 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  39 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  40 import gr.grnet.pithos.web.client.foldertree.File;
  41 import gr.grnet.pithos.web.client.foldertree.Folder;
  42 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  43 import gr.grnet.pithos.web.client.foldertree.FolderTreeViewModel;
  44 import gr.grnet.pithos.web.client.foldertree.Resource;
  45 import gr.grnet.pithos.web.client.grouptree.Group;
  46 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  47 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  48 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  49 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  50 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  51 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  52 import gr.grnet.pithos.web.client.rest.DeleteRequest;
  53 import gr.grnet.pithos.web.client.rest.GetRequest;
  54 import gr.grnet.pithos.web.client.rest.HeadRequest;
  55 import gr.grnet.pithos.web.client.rest.PutRequest;
  56 import gr.grnet.pithos.web.client.rest.RestException;
  57
  58 import java.util.ArrayList;
  59 import java.util.HashMap;
  60 import java.util.Iterator;
  61 import java.util.List;
  62 import java.util.Set;
  63
  64 import com.google.gwt.core.client.EntryPoint;
  65 import com.google.gwt.core.client.GWT;
  66 import com.google.gwt.core.client.Scheduler;
  67 import com.google.gwt.core.client.Scheduler.RepeatingCommand;
  68 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  69 import com.google.gwt.event.dom.client.ClickEvent;
  70 import com.google.gwt.event.dom.client.ClickHandler;
  71 import com.google.gwt.event.logical.shared.ResizeEvent;
  72 import com.google.gwt.event.logical.shared.ResizeHandler;
  73 import com.google.gwt.http.client.Request;
  74 import com.google.gwt.http.client.RequestBuilder;
  75 import com.google.gwt.http.client.RequestCallback;
  76 import com.google.gwt.http.client.RequestException;
  77 import com.google.gwt.http.client.Response;
  78 import com.google.gwt.http.client.URL;
  79 import com.google.gwt.i18n.client.Dictionary;
  80 import com.google.gwt.i18n.client.NumberFormat;
  81 import com.google.gwt.json.client.JSONArray;
  82 import com.google.gwt.json.client.JSONObject;
  83 import com.google.gwt.json.client.JSONParser;
  84 import com.google.gwt.json.client.JSONString;
  85 import com.google.gwt.json.client.JSONValue;
  86 import com.google.gwt.resources.client.ClientBundle;
  87 import com.google.gwt.resources.client.CssResource;
  88 import com.google.gwt.resources.client.ImageResource;
  89 import com.google.gwt.resources.client.ClientBundle.Source;
  90 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  91 import com.google.gwt.user.client.Command;
  92 import com.google.gwt.user.client.Cookies;
  93 import com.google.gwt.user.client.Event;
  94 import com.google.gwt.user.client.History;
  95 import com.google.gwt.user.client.Window;
  96 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  97 import com.google.gwt.user.client.ui.Button;
  98 import com.google.gwt.user.client.ui.Composite;
  99 import com.google.gwt.user.client.ui.HTML;
 100 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
 101 import com.google.gwt.user.client.ui.HasVerticalAlignment;
 102 import com.google.gwt.user.client.ui.HorizontalPanel;
 103 import com.google.gwt.user.client.ui.HorizontalSplitPanel;
 104 import com.google.gwt.user.client.ui.RootPanel;
 105 import com.google.gwt.user.client.ui.VerticalPanel;
 106 import com.google.gwt.view.client.SelectionChangeEvent;
 107 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
 108 import com.google.gwt.view.client.SingleSelectionModel;
 109
 110 /**
 111  * Entry point classes define <code>onModuleLoad()</code>.
 112  */
 113 public class Pithos implements EntryPoint, ResizeHandler {
 114
 115         public static final String HOME_CONTAINER = "pithos";
 116
 117         public static final String TRASH_CONTAINER = "trash";
 118
 119         public static final Configuration config = GWT.create(Configuration.class);
 120
 121         public interface Style extends CssResource {
 122                 String commandAnchor();
 123         }
 124
 125         public interface Resources extends ClientBundle {
 126                 @Source("Pithos.css")
 127                 Style pithosCss();
 128         }
 129
 130         public static Resources resources = GWT.create(Resources.class);
 131
 132         /**
 133          * Instantiate an application-level image bundle. This object will provide
 134          * programmatic access to all the images needed by widgets.
 135          */
 136         static Images images = (Images) GWT.create(Images.class);
 137
 138     public String getUsername() {
 139         return username;
 140     }
 141
 142     public void setAccount(AccountResource acct) {
 143         account = acct;
 144     }
 145
 146     public AccountResource getAccount() {
 147         return account;
 148     }
 149
 150     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 151         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 152     }
 153
 154     public void updateGroupNode(Group group) {
 155         groupTreeView.updateGroupNode(group);
 156     }
 157
 158     public void updateMySharedRoot() {
 159         mysharedTreeView.updateRoot();
 160     }
 161
 162     public void updateSharedFolder(Folder f, boolean showfiles, Command callback) {
 163         mysharedTreeView.updateFolder(f, showfiles, callback);
 164     }
 165
 166     public void updateSharedFolder(Folder f, boolean showfiles) {
 167         updateSharedFolder(f, showfiles, null);
 168     }
 169
 170     public void updateOtherSharedFolder(Folder f, boolean showfiles) {
 171         otherSharedTreeView.updateFolder(f, showfiles);
 172     }
 173
 174     public MysharedTreeView getMySharedTreeView() {
 175         return mysharedTreeView;
 176     }
 177
 178     /**
 179          * An aggregate image bundle that pulls together all the images for this
 180          * application into a single bundle.
 181          */
 182         public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 183
 184                 @Source("gr/grnet/pithos/resources/document.png")
 185                 ImageResource folders();
 186
 187                 @Source("gr/grnet/pithos/resources/advancedsettings.png")
 188                 @ImageOptions(width=32, height=32)
 189                 ImageResource tools();
 190         }
 191
 192         private Throwable error;
 193
 194         /**
 195          * The Application Clipboard implementation;
 196          */
 197         private Clipboard clipboard = new Clipboard();
 198
 199         /**
 200          * The top panel that contains the menu bar.
 201          */
 202         private TopPanel topPanel;
 203
 204         /**
 205          * The panel that contains the various system messages.
 206          */
 207         private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 208
 209         /**
 210          * The bottom panel that contains the status bar.
 211          */
 212         private StatusPanel statusPanel = null;
 213
 214         /**
 215          * The file list widget.
 216          */
 217         private FileList fileList;
 218
 219         /**
 220          * The tab panel that occupies the right side of the screen.
 221          */
 222         private VerticalPanel inner = new VerticalPanel();
 223
 224
 225         /**
 226          * The split panel that will contain the left and right panels.
 227          */
 228         private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 229
 230         /**
 231          * The currently selected item in the application, for use by the Edit menu
 232          * commands. Potential types are Folder, File, User and Group.
 233          */
 234         private Object currentSelection;
 235
 236         public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 237
 238     private String username = null;
 239
 240     /**
 241      * The authentication token of the current user.
 242      */
 243     private String token;
 244
 245     VerticalPanel trees;
 246
 247     SingleSelectionModel<Folder> folderTreeSelectionModel;
 248     FolderTreeViewModel folderTreeViewModel;
 249     FolderTreeView folderTreeView;
 250
 251     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 252     MysharedTreeViewModel mysharedTreeViewModel;
 253     MysharedTreeView mysharedTreeView = null;;
 254
 255     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 256     OtherSharedTreeViewModel otherSharedTreeViewModel;
 257     OtherSharedTreeView otherSharedTreeView = null;
 258
 259     GroupTreeViewModel groupTreeViewModel;
 260     GroupTreeView groupTreeView;
 261
 262     TreeView selectedTree;
 263     protected AccountResource account;
 264
 265     Folder trash;
 266
 267     List<Composite> treeViews = new ArrayList<Composite>();
 268
 269     @SuppressWarnings("rawtypes") List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 270
 271     Button upload;
 272
 273     private HTML numOfFiles;
 274
 275     private Toolbar toolbar;
 276
 277     private FileUploadDialog fileUploadDialog;
 278
 279         @Override
 280         public void onModuleLoad() {
 281                 if (parseUserCredentials())
 282             initialize();
 283         }
 284
 285     private void initialize() {
 286         resources.pithosCss().ensureInjected();
 287         boolean bareContent = Window.Location.getParameter("noframe") != null;
 288         String contentWidth = bareContent ? "100%" : "75%";
 289
 290         VerticalPanel outer = new VerticalPanel();
 291         outer.setWidth("100%");
 292         if (!bareContent) {
 293                 outer.addStyleName("pithos-outer");
 294         }
 295
 296         if (!bareContent) {
 297                 topPanel = new TopPanel(this, Pithos.images);
 298                 topPanel.setWidth("100%");
 299                 outer.add(topPanel);
 300                 outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 301         }
 302
 303         messagePanel.setVisible(false);
 304         outer.add(messagePanel);
 305         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 306         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 307
 308         HorizontalPanel header = new HorizontalPanel();
 309         header.addStyleName("pithos-header");
 310         header.setWidth(contentWidth);
 311         if (bareContent)
 312                 header.addStyleName("pithos-header-noframe");
 313         upload = new Button("Upload", new ClickHandler() {
 314             @Override
 315             public void onClick(ClickEvent event) {
 316                 if (getSelection() != null)
 317                         new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 318             }
 319         });
 320         upload.addStyleName("pithos-uploadButton");
 321         header.add(upload);
 322         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 323         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 324
 325         toolbar = new Toolbar(this);
 326         header.add(toolbar);
 327         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 328         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 329
 330         HorizontalPanel folderStatistics = new HorizontalPanel();
 331         folderStatistics.addStyleName("pithos-folderStatistics");
 332         numOfFiles = new HTML();
 333         folderStatistics.add(numOfFiles);
 334         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 335         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 336         folderStatistics.add(numOfFilesLabel);
 337         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 338         header.add(folderStatistics);
 339         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 340         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 341         header.setCellWidth(folderStatistics, "40px");
 342         outer.add(header);
 343         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 344         // Inner contains the various lists.nner
 345         inner.sinkEvents(Event.ONCONTEXTMENU);
 346         inner.setWidth("100%");
 347
 348         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 349         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 350             @Override
 351             public void onSelectionChange(SelectionChangeEvent event) {
 352                 if (folderTreeSelectionModel.getSelectedObject() != null) {
 353                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 354                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 355                     Folder f = folderTreeSelectionModel.getSelectedObject();
 356                         updateFolder(f, true, new Command() {
 357
 358                                 @Override
 359                                 public void execute() {
 360                                         updateStatistics();
 361                                 }
 362                         }, true);
 363                         showRelevantToolbarButtons();
 364                 }
 365                                 else {
 366                                         if (getSelectedTree().equals(folderTreeView))
 367                                                 setSelectedTree(null);
 368                                         if (getSelectedTree() == null)
 369                                                 showRelevantToolbarButtons();
 370                                 }
 371             }
 372         });
 373         selectionModels.add(folderTreeSelectionModel);
 374
 375         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 376         folderTreeView = new FolderTreeView(folderTreeViewModel);
 377         treeViews.add(folderTreeView);
 378
 379         fileList = new FileList(this, images);
 380         inner.add(fileList);
 381
 382         trees = new VerticalPanel();
 383         trees.setWidth("100%");
 384
 385         // Add the left and right panels to the split panel.
 386         splitPanel.setLeftWidget(trees);
 387         splitPanel.setRightWidget(inner);
 388         splitPanel.setSplitPosition("219px");
 389         splitPanel.setSize("100%", "100%");
 390         splitPanel.addStyleName("pithos-splitPanel");
 391         splitPanel.setWidth(contentWidth);
 392         outer.add(splitPanel);
 393         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 394
 395         if (!bareContent) {
 396                 statusPanel = new StatusPanel();
 397                 statusPanel.setWidth("100%");
 398                 outer.add(statusPanel);
 399                 outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 400         }
 401         else
 402                 splitPanel.addStyleName("pithos-splitPanel-noframe");
 403
 404         // Hook the window resize event, so that we can adjust the UI.
 405         Window.addResizeHandler(this);
 406         // Clear out the window's built-in margin, because we want to take
 407         // advantage of the entire client area.
 408         Window.setMargin("0px");
 409         // Finally, add the outer panel to the RootPanel, so that it will be
 410         // displayed.
 411         RootPanel.get().add(outer);
 412         // Call the window resized handler to get the initial sizes setup. Doing
 413         // this in a deferred command causes it to occur after all widgets'
 414         // sizes have been computed by the browser.
 415         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 416
 417             @Override
 418             public void execute() {
 419                 onWindowResized(Window.getClientHeight());
 420             }
 421         });
 422
 423         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 424             @Override
 425             public void execute() {
 426                 fetchAccount(new Command() {
 427
 428                                         @Override
 429                                         public void execute() {
 430                                 if (!account.hasHomeContainer())
 431                                     createHomeContainer(account, this);
 432                                 else if (!account.hasTrashContainer())
 433                                         createTrashContainer(this);
 434                                 else {
 435                                         for (Folder f : account.getContainers())
 436                                                 if (f.getName().equals(Pithos.TRASH_CONTAINER)) {
 437                                                         trash = f;
 438                                                         break;
 439                                                 }
 440                                     trees.add(folderTreeView);
 441                                     folderTreeViewModel.initialize(account, new Command() {
 442
 443                                                                 @Override
 444                                                                 public void execute() {
 445                                                     createMySharedTree();
 446                                                                 }
 447                                                         });
 448
 449                                     HorizontalPanel separator = new HorizontalPanel();
 450                                     separator.addStyleName("pithos-statisticsSeparator");
 451                                     separator.add(new HTML(""));
 452                                     trees.add(separator);
 453
 454                                     groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 455                                     groupTreeView = new GroupTreeView(groupTreeViewModel);
 456                                     treeViews.add(groupTreeView);
 457                                     trees.add(groupTreeView);
 458                                     folderTreeView.showStatistics(account);
 459                                 }
 460                                         }
 461                                 });
 462             }
 463         });
 464
 465         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 466
 467                         @Override
 468                         public boolean execute() {
 469                                 Folder f = getSelection();
 470                                 if (f != null) {
 471                                         if (getSelectedTree().equals(folderTreeView))
 472                                                 updateFolder(f, true, null, false);
 473                                         else if (getSelectedTree().equals(mysharedTreeView))
 474                                                 updateSharedFolder(f, true);
 475                                 }
 476                                 return true;
 477                         }
 478                 }, 3000);
 479     }
 480
 481     public void applyPermissions(Folder f) {
 482         if (f != null) {
 483                 if (f.isInTrash())
 484                         upload.setEnabled(false);
 485                 else {
 486                         Boolean[] perms = f.getPermissions().get(username);
 487                         if (f.getOwner().equals(username) || (perms != null && perms[1] != null && perms[1])) {
 488                                 upload.setEnabled(true);
 489                         }
 490                         else
 491                                 upload.setEnabled(false);
 492                 }
 493         }
 494         else
 495                 upload.setEnabled(false);
 496         }
 497
 498         @SuppressWarnings({ "rawtypes", "unchecked" })
 499         public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 500         selectedTree = _selectedTree;
 501
 502         for (SingleSelectionModel s : selectionModels)
 503             if (!s.equals(model) && s.getSelectedObject() != null)
 504                 s.setSelected(s.getSelectedObject(), false);
 505     }
 506
 507     public void showFiles(final Folder f) {
 508         Set<File> files = f.getFiles();
 509         showFiles(files);
 510     }
 511
 512     public void showFiles(Set<File> files) {
 513         fileList.setFiles(new ArrayList<File>(files));
 514     }
 515
 516     /**
 517          * Parse and store the user credentials to the appropriate fields.
 518          */
 519         private boolean parseUserCredentials() {
 520         Configuration conf = (Configuration) GWT.create(Configuration.class);
 521                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 522         String cookie = otherProperties.get("authCookie");
 523         String auth = Cookies.getCookie(cookie);
 524         if (auth == null) {
 525             authenticateUser();
 526             return false;
 527         }
 528         if (auth.startsWith("\""))
 529                 auth = auth.substring(1);
 530         if (auth.endsWith("\""))
 531                 auth = auth.substring(0, auth.length() - 1);
 532                 String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 533                 if (authSplit.length != 2) {
 534                     authenticateUser();
 535                     return false;
 536                 }
 537                 username = authSplit[0];
 538                 token = authSplit[1];
 539
 540         String gotoUrl = Window.Location.getParameter("goto");
 541                 if (gotoUrl != null && gotoUrl.length() > 0) {
 542                         Window.Location.assign(gotoUrl);
 543                         return false;
 544                 }
 545                 return true;
 546     }
 547
 548     /**
 549          * Redirect the user to the login page for authentication.
 550          */
 551         protected void authenticateUser() {
 552                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 553         Window.Location.assign(otherProperties.get("loginUrl") + Window.Location.getHref());
 554         }
 555
 556         protected void fetchAccount(final Command callback) {
 557         String path = "?format=json";
 558
 559         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 560             @Override
 561             public void onSuccess(AccountResource _result) {
 562                 account = _result;
 563                 if (callback != null)
 564                         callback.execute();
 565             }
 566
 567             @Override
 568             public void onError(Throwable t) {
 569                 GWT.log("Error getting account", t);
 570                                 setError(t);
 571                 if (t instanceof RestException)
 572                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 573                 else
 574                     displayError("System error fetching user data: " + t.getMessage());
 575             }
 576
 577                         @Override
 578                         protected void onUnauthorized(Response response) {
 579                                 sessionExpired();
 580                         }
 581         };
 582         getAccount.setHeader("X-Auth-Token", token);
 583         Scheduler.get().scheduleDeferred(getAccount);
 584     }
 585
 586     public void updateStatistics() {
 587         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), username, "", account) {
 588
 589                         @Override
 590                         public void onSuccess(AccountResource _result) {
 591                                 folderTreeView.showStatistics(account);
 592                         }
 593
 594                         @Override
 595                         public void onError(Throwable t) {
 596                 GWT.log("Error getting account", t);
 597                                 setError(t);
 598                 if (t instanceof RestException)
 599                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 600                 else
 601                     displayError("System error fetching user data: " + t.getMessage());
 602                         }
 603
 604                         @Override
 605                         protected void onUnauthorized(Response response) {
 606                                 sessionExpired();
 607                         }
 608                 };
 609                 headAccount.setHeader("X-Auth-Token", token);
 610                 Scheduler.get().scheduleDeferred(headAccount);
 611         }
 612
 613         protected void createHomeContainer(final AccountResource _account, final Command callback) {
 614         String path = "/" + Pithos.HOME_CONTAINER;
 615         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 616             @Override
 617             public void onSuccess(Resource result) {
 618                 if (!_account.hasTrashContainer())
 619                         createTrashContainer(callback);
 620                 else
 621                         fetchAccount(callback);
 622             }
 623
 624             @Override
 625             public void onError(Throwable t) {
 626                 GWT.log("Error creating pithos", t);
 627                                 setError(t);
 628                 if (t instanceof RestException)
 629                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 630                 else
 631                     displayError("System error Error creating pithos: " + t.getMessage());
 632             }
 633
 634                         @Override
 635                         protected void onUnauthorized(Response response) {
 636                                 sessionExpired();
 637                         }
 638         };
 639         createPithos.setHeader("X-Auth-Token", getToken());
 640         Scheduler.get().scheduleDeferred(createPithos);
 641     }
 642
 643     protected void createTrashContainer(final Command callback) {
 644         String path = "/" + Pithos.TRASH_CONTAINER;
 645         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 646             @Override
 647             public void onSuccess(Resource result) {
 648                         fetchAccount(callback);
 649             }
 650
 651             @Override
 652             public void onError(Throwable t) {
 653                 GWT.log("Error creating pithos", t);
 654                                 setError(t);
 655                 if (t instanceof RestException)
 656                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 657                 else
 658                     displayError("System error Error creating pithos: " + t.getMessage());
 659             }
 660
 661                         @Override
 662                         protected void onUnauthorized(Response response) {
 663                                 sessionExpired();
 664                         }
 665         };
 666         createPithos.setHeader("X-Auth-Token", getToken());
 667         Scheduler.get().scheduleDeferred(createPithos);
 668     }
 669
 670     /**
 671          * Creates an HTML fragment that places an image & caption together, for use
 672          * in a group header.
 673          *
 674          * @param imageProto an image prototype for an image
 675          * @param caption the group caption
 676          * @return the header HTML fragment
 677          */
 678         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 679                 String captionHTML = "<table class='caption' cellpadding='0' "
 680                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 681                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 682                 + caption + "</b></td></tr></table>";
 683                 return captionHTML;
 684         }
 685
 686         protected void onWindowResized(int height) {
 687                 // Adjust the split panel to take up the available room in the window.
 688                 int newHeight = height - splitPanel.getAbsoluteTop();
 689                 if (newHeight < 1)
 690                         newHeight = 1;
 691                 splitPanel.setHeight("" + newHeight);
 692                 inner.setHeight("" + newHeight);
 693         }
 694
 695         @Override
 696         public void onResize(ResizeEvent event) {
 697                 int height = event.getHeight();
 698                 onWindowResized(height);
 699         }
 700
 701         /**
 702          * Display an error message.
 703          *
 704          * @param msg the message to display
 705          */
 706         public void displayError(String msg) {
 707                 messagePanel.displayError(msg);
 708         }
 709
 710         /**
 711          * Display a warning message.
 712          *
 713          * @param msg the message to display
 714          */
 715         public void displayWarning(String msg) {
 716                 messagePanel.displayWarning(msg);
 717         }
 718
 719         /**
 720          * Display an informational message.
 721          *
 722          * @param msg the message to display
 723          */
 724         public void displayInformation(String msg) {
 725                 messagePanel.displayInformation(msg);
 726         }
 727
 728         /**
 729          * Retrieve the fileList.
 730          *
 731          * @return the fileList
 732          */
 733         public FileList getFileList() {
 734                 return fileList;
 735         }
 736
 737         /**
 738          * Retrieve the topPanel.
 739          *
 740          * @return the topPanel
 741          */
 742         TopPanel getTopPanel() {
 743                 return topPanel;
 744         }
 745
 746         /**
 747          * Retrieve the clipboard.
 748          *
 749          * @return the clipboard
 750          */
 751         public Clipboard getClipboard() {
 752                 return clipboard;
 753         }
 754
 755         public StatusPanel getStatusPanel() {
 756                 return statusPanel;
 757         }
 758
 759         public String getToken() {
 760                 return token;
 761         }
 762
 763         public static native void preventIESelection() /*-{
 764                 $doc.body.onselectstart = function () { return false; };
 765         }-*/;
 766
 767         public static native void enableIESelection() /*-{
 768                 if ($doc.body.onselectstart != null)
 769                 $doc.body.onselectstart = null;
 770         }-*/;
 771
 772         /**
 773          * @return the absolute path of the API root URL
 774          */
 775         public String getApiPath() {
 776                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 777                 return conf.apiPath();
 778         }
 779
 780         /**
 781          * History support for folder navigation
 782          * adds a new browser history entry
 783          *
 784          * @param key
 785          */
 786         public void updateHistory(String key){
 787 //              Replace any whitespace of the initial string to "+"
 788 //              String result = key.replaceAll("\\s","+");
 789 //              Add a new browser history entry.
 790 //              History.newItem(result);
 791                 History.newItem(key);
 792         }
 793
 794     public void deleteFolder(final Folder folder, final Command callback) {
 795         String path = getApiPath() + folder.getOwner() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(folder.getPrefix()) + "&t=" + System.currentTimeMillis();
 796         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 797         builder.setHeader("X-Auth-Token", getToken());
 798         try {
 799             builder.sendRequest("", new RequestCallback() {
 800                 @Override
 801                 public void onResponseReceived(Request request, Response response) {
 802                     if (response.getStatusCode() == Response.SC_OK) {
 803                         JSONValue json = JSONParser.parseStrict(response.getText());
 804                         JSONArray array = json.isArray();
 805                         int i = 0;
 806                         if (array != null) {
 807                             deleteObject(folder, i, array, callback);
 808                         }
 809                     }
 810                 }
 811
 812                 @Override
 813                 public void onError(Request request, Throwable exception) {
 814                         setError(exception);
 815                     displayError("System error unable to delete folder: " + exception.getMessage());
 816                 }
 817             });
 818         }
 819         catch (RequestException e) {
 820         }
 821     }
 822
 823     void deleteObject(final Folder folder, final int i, final JSONArray array, final Command callback) {
 824         if (i < array.size()) {
 825             JSONObject o = array.get(i).isObject();
 826             if (o != null && !o.containsKey("subdir")) {
 827                 JSONString name = o.get("name").isString();
 828                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 829                 DeleteRequest delete = new DeleteRequest(getApiPath(), folder.getOwner(), URL.encode(path)) {
 830                     @Override
 831                     public void onSuccess(Resource result) {
 832                         deleteObject(folder, i + 1, array, callback);
 833                     }
 834
 835                     @Override
 836                     public void onError(Throwable t) {
 837                         GWT.log("", t);
 838                                                 setError(t);
 839                         displayError("System error unable to delete folder: " + t.getMessage());
 840                     }
 841
 842                                 @Override
 843                                 protected void onUnauthorized(Response response) {
 844                                         sessionExpired();
 845                                 }
 846                 };
 847                 delete.setHeader("X-Auth-Token", getToken());
 848                 Scheduler.get().scheduleDeferred(delete);
 849             }
 850             else if (o != null) {
 851                 String subdir = o.get("subdir").isString().stringValue();
 852                 subdir = subdir.substring(0, subdir.length() - 1);
 853                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(subdir) + "&t=" + System.currentTimeMillis();
 854                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 855                 builder.setHeader("X-Auth-Token", getToken());
 856                 try {
 857                     builder.sendRequest("", new RequestCallback() {
 858                         @Override
 859                         public void onResponseReceived(Request request, Response response) {
 860                             if (response.getStatusCode() == Response.SC_OK) {
 861                                 JSONValue json = JSONParser.parseStrict(response.getText());
 862                                 JSONArray array2 = json.isArray();
 863                                 if (array2 != null) {
 864                                     int l = array.size();
 865                                     for (int j=0; j<array2.size(); j++) {
 866                                         array.set(l++, array2.get(j));
 867                                     }
 868                                 }
 869                                 deleteObject(folder, i + 1, array, callback);
 870                             }
 871                         }
 872
 873                         @Override
 874                         public void onError(Request request, Throwable exception) {
 875                                 setError(exception);
 876                             displayError("System error unable to delete folder: " + exception.getMessage());
 877                         }
 878                     });
 879                 }
 880                 catch (RequestException e) {
 881                 }
 882             }
 883         }
 884         else {
 885             String path = folder.getUri();
 886             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), URL.encode(path)) {
 887                 @Override
 888                 public void onSuccess(Resource result) {
 889                     updateFolder(folder.getParent(), true, new Command() {
 890
 891                                                 @Override
 892                                                 public void execute() {
 893                                                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
 894                                                         updateStatistics();
 895                                                         if (callback != null)
 896                                                                 callback.execute();
 897                                                 }
 898                                         }, true);
 899                 }
 900
 901                 @Override
 902                 public void onError(Throwable t) {
 903                     GWT.log("", t);
 904                                         setError(t);
 905                     if (t instanceof RestException) {
 906                         if (((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND)
 907                                 displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 908                         else
 909                                 onSuccess(null);
 910                     }
 911                     else
 912                         displayError("System error unable to delete folder: " + t.getMessage());
 913                 }
 914
 915                                 @Override
 916                                 protected void onUnauthorized(Response response) {
 917                                         sessionExpired();
 918                                 }
 919             };
 920             deleteFolder.setHeader("X-Auth-Token", getToken());
 921             Scheduler.get().scheduleDeferred(deleteFolder);
 922         }
 923     }
 924
 925     public FolderTreeView getFolderTreeView() {
 926         return folderTreeView;
 927     }
 928
 929     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
 930         if (iter.hasNext()) {
 931             File file = iter.next();
 932             String path = targetUri + "/" + file.getName();
 933             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
 934                 @Override
 935                 public void onSuccess(Resource result) {
 936                     copyFiles(iter, targetUsername, targetUri, callback);
 937                 }
 938
 939                 @Override
 940                 public void onError(Throwable t) {
 941                     GWT.log("", t);
 942                                         setError(t);
 943                     if (t instanceof RestException) {
 944                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 945                     }
 946                     else
 947                         displayError("System error unable to copy file: "+t.getMessage());
 948                 }
 949
 950                                 @Override
 951                                 protected void onUnauthorized(Response response) {
 952                                         sessionExpired();
 953                                 }
 954             };
 955             copyFile.setHeader("X-Auth-Token", getToken());
 956             copyFile.setHeader("X-Copy-From", URL.encodePathSegment(file.getUri()));
 957             if (!file.getOwner().equals(targetUsername))
 958                 copyFile.setHeader("X-Source-Account", URL.encodePathSegment(file.getOwner()));
 959             copyFile.setHeader("Content-Type", file.getContentType());
 960             Scheduler.get().scheduleDeferred(copyFile);
 961         }
 962         else  if (callback != null) {
 963             callback.execute();
 964         }
 965     }
 966
 967     public void copySubfolders(final Iterator<Folder> iter, final String targetUsername, final String targetUri, final Command callback) {
 968         if (iter.hasNext()) {
 969             final Folder f = iter.next();
 970             copyFolder(f, targetUsername, targetUri, new Command() {
 971
 972                                 @Override
 973                                 public void execute() {
 974                                         copySubfolders(iter, targetUsername, targetUri, callback);
 975                                 }
 976                         });
 977         }
 978         else  if (callback != null) {
 979             callback.execute();
 980         }
 981     }
 982
 983     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, final Command callback) {
 984         String path = targetUri + "/" + f.getName();
 985         PutRequest createFolder = new PutRequest(getApiPath(), targetUsername, path) {
 986             @Override
 987             public void onSuccess(Resource result) {
 988                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, getApiPath(), f.getOwner(), "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix()), f) {
 989
 990                                         @Override
 991                                         public void onSuccess(final Folder _f) {
 992                                 Iterator<File> iter = _f.getFiles().iterator();
 993                                 copyFiles(iter, targetUsername, targetUri + "/" + _f.getName(), new Command() {
 994                                     @Override
 995                                     public void execute() {
 996                                         Iterator<Folder> iterf = _f.getSubfolders().iterator();
 997                                         copySubfolders(iterf, targetUsername, targetUri + "/" + _f.getName(), callback);
 998                                     }
 999                                 });
1000                                         }
1001
1002                                         @Override
1003                                         public void onError(Throwable t) {
1004                                 GWT.log("", t);
1005                                                 setError(t);
1006                                 if (t instanceof RestException) {
1007                                     displayError("Unable to get folder: " + ((RestException) t).getHttpStatusText());
1008                                 }
1009                                 else
1010                                     displayError("System error getting folder: " + t.getMessage());
1011                                         }
1012
1013                                         @Override
1014                                         protected void onUnauthorized(Response response) {
1015                                                 sessionExpired();
1016                                         }
1017                                 };
1018                                 getFolder.setHeader("X-Auth-Token", getToken());
1019                                 Scheduler.get().scheduleDeferred(getFolder);
1020             }
1021
1022             @Override
1023             public void onError(Throwable t) {
1024                 GWT.log("", t);
1025                                 setError(t);
1026                if (t instanceof RestException) {
1027                     displayError("Unable to create folder: " + ((RestException) t).getHttpStatusText());
1028                 }
1029                 else
1030                     displayError("System error creating folder: " + t.getMessage());
1031             }
1032
1033                         @Override
1034                         protected void onUnauthorized(Response response) {
1035                                 sessionExpired();
1036                         }
1037         };
1038         createFolder.setHeader("X-Auth-Token", getToken());
1039         createFolder.setHeader("Accept", "*/*");
1040         createFolder.setHeader("Content-Length", "0");
1041         createFolder.setHeader("Content-Type", "application/folder");
1042         Scheduler.get().scheduleDeferred(createFolder);
1043     }
1044
1045     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1046         selectionModels.add(model);
1047     }
1048
1049         public OtherSharedTreeView getOtherSharedTreeView() {
1050                 return otherSharedTreeView;
1051         }
1052
1053         public void updateTrash(boolean showFiles, Command callback) {
1054                 updateFolder(trash, showFiles, callback, true);
1055         }
1056
1057         public void updateGroupsNode() {
1058                 groupTreeView.updateGroupNode(null);
1059         }
1060
1061         public Group addGroup(String groupname) {
1062                 Group newGroup = new Group(groupname);
1063                 account.addGroup(newGroup);
1064                 groupTreeView.updateGroupNode(null);
1065                 return newGroup;
1066         }
1067
1068         public void removeGroup(Group group) {
1069                 account.removeGroup(group);
1070                 updateGroupsNode();
1071         }
1072
1073         public TreeView getSelectedTree() {
1074                 return selectedTree;
1075         }
1076
1077         public void setSelectedTree(TreeView selected) {
1078                 selectedTree = selected;
1079         }
1080
1081         public Folder getSelection() {
1082                 if (selectedTree != null)
1083                         return selectedTree.getSelection();
1084                 return null;
1085         }
1086
1087         public void showFolderStatistics(int folderFileCount) {
1088                 numOfFiles.setHTML(String.valueOf(folderFileCount));
1089         }
1090
1091         public GroupTreeView getGroupTreeView() {
1092                 return groupTreeView;
1093         }
1094
1095         public void sessionExpired() {
1096                 new SessionExpiredDialog(this).center();
1097         }
1098
1099         public void updateRootFolder(Command callback) {
1100                 updateFolder(account.getPithos(), false, callback, true);
1101         }
1102
1103         void createMySharedTree() {
1104                 mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1105                 mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1106                     @Override
1107                     public void onSelectionChange(SelectionChangeEvent event) {
1108                         if (mysharedTreeSelectionModel.getSelectedObject() != null) {
1109                             deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1110                             upload.setEnabled(false);
1111                             updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1112                                         showRelevantToolbarButtons();
1113                         }
1114                                 else {
1115                                         if (getSelectedTree().equals(mysharedTreeView))
1116                                                 setSelectedTree(null);
1117                                         if (getSelectedTree() == null)
1118                                                 showRelevantToolbarButtons();
1119                                 }
1120                     }
1121                 });
1122                 selectionModels.add(mysharedTreeSelectionModel);
1123                 mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1124                 mysharedTreeViewModel.initialize(new Command() {
1125
1126                         @Override
1127                         public void execute() {
1128                             mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1129                                 trees.insert(mysharedTreeView, 2);
1130                                 treeViews.add(mysharedTreeView);
1131                                 createOtherSharedTree();
1132                         }
1133                 });
1134         }
1135
1136         void createOtherSharedTree() {
1137                 otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1138                 otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1139                     @Override
1140                     public void onSelectionChange(SelectionChangeEvent event) {
1141                         if (otherSharedTreeSelectionModel.getSelectedObject() != null) {
1142                             deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1143                             applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1144                             updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true);
1145                                         showRelevantToolbarButtons();
1146                         }
1147                                 else {
1148                                         if (getSelectedTree().equals(otherSharedTreeView))
1149                                                 setSelectedTree(null);
1150                                         if (getSelectedTree() == null)
1151                                                 showRelevantToolbarButtons();
1152                                 }
1153                     }
1154                 });
1155                 selectionModels.add(otherSharedTreeSelectionModel);
1156                 otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1157                 otherSharedTreeViewModel.initialize(new Command() {
1158
1159                         @Override
1160                         public void execute() {
1161                             otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1162                                 trees.insert(otherSharedTreeView, 1);
1163                                 treeViews.add(otherSharedTreeView);
1164                         }
1165                 });
1166         }
1167
1168         public native void log1(String message)/*-{
1169                 $wnd.console.log(message);
1170         }-*/;
1171
1172         public String getErrorData() {
1173                 if (error != null)
1174                         return error.toString();
1175                 return "";
1176         }
1177
1178         public void setError(Throwable t) {
1179                 error = t;
1180         }
1181
1182         public void showRelevantToolbarButtons() {
1183                 toolbar.showRelevantButtons();
1184         }
1185
1186         public FileUploadDialog getFileUploadDialog() {
1187                 if (fileUploadDialog == null)
1188                         fileUploadDialog = new FileUploadDialog(this);
1189                 return fileUploadDialog;
1190         }
1191
1192         public void hideUploadIndicator() {
1193                 upload.removeStyleName("pithos-uploadButton-loading");
1194                 upload.setTitle("");
1195         }
1196
1197         public void showUploadIndicator() {
1198                 upload.addStyleName("pithos-uploadButton-loading");
1199                 upload.setTitle("Upload in progress. Click for details.");
1200         }
1201
1202         public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1203                 if (folder == null) {
1204                         if (callback != null)
1205                                 callback.execute();
1206                 }
1207                 else {
1208                         HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwner(), folder.getUri(), folder) {
1209
1210                                 @Override
1211                                 public void onSuccess(Folder _result) {
1212                                         if (callback != null)
1213                                                 callback.execute();
1214                                 }
1215
1216                                 @Override
1217                                 public void onError(Throwable t) {
1218                                 if (t instanceof RestException) {
1219                                         if (((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1220                                 final String path = folder.getUri();
1221                                 PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwner(), path) {
1222                                     @Override
1223                                     public void onSuccess(Resource _result) {
1224                                         scheduleFolderHeadCommand(folder, callback);
1225                                     }
1226
1227                                     @Override
1228                                     public void onError(Throwable _t) {
1229                                         GWT.log("", _t);
1230                                                                 setError(_t);
1231                                         if(_t instanceof RestException){
1232                                             displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1233                                         }
1234                                         else
1235                                             displayError("System error creating folder: " + _t.getMessage());
1236                                     }
1237
1238                                                 @Override
1239                                                 protected void onUnauthorized(Response response) {
1240                                                         sessionExpired();
1241                                                 }
1242                                 };
1243                                 newFolder.setHeader("X-Auth-Token", getToken());
1244                                 newFolder.setHeader("Content-Type", "application/folder");
1245                                 newFolder.setHeader("Accept", "*/*");
1246                                 newFolder.setHeader("Content-Length", "0");
1247                                 Scheduler.get().scheduleDeferred(newFolder);
1248                                         }
1249                                         else
1250                                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1251                                 }
1252                                 else
1253                                     displayError("System error heading folder: " + t.getMessage());
1254
1255                                 GWT.log("Error heading folder", t);
1256                                         setError(t);
1257                                 }
1258
1259                                 @Override
1260                                 protected void onUnauthorized(Response response) {
1261                                         sessionExpired();
1262                                 }
1263                         };
1264                         headFolder.setHeader("X-Auth-Token", getToken());
1265                         Scheduler.get().scheduleDeferred(headFolder);
1266                 }
1267         }
1268
1269         public void scheduleFileHeadCommand(File f, final Command callback) {
1270                 HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwner(), f.getUri(), f) {
1271
1272                         @Override
1273                         public void onSuccess(File _result) {
1274                                 if (callback != null)
1275                                         callback.execute();
1276                         }
1277
1278                         @Override
1279                         public void onError(Throwable t) {
1280                         GWT.log("Error heading file", t);
1281                                 setError(t);
1282                         if (t instanceof RestException)
1283                             displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1284                         else
1285                             displayError("System error heading file: " + t.getMessage());
1286                         }
1287
1288                         @Override
1289                         protected void onUnauthorized(Response response) {
1290                                 sessionExpired();
1291                         }
1292                 };
1293                 headFile.setHeader("X-Auth-Token", getToken());
1294                 Scheduler.get().scheduleDeferred(headFile);
1295         }
1296
1297         public boolean isMySharedSelected() {
1298                 return getSelectedTree().equals(getMySharedTreeView());
1299         }
1300 }