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

   1 /*
   2  * Copyright (c) 2011 Greek Research and Technology Network
   3  */
   4 package gr.grnet.pithos.web.client;
   5
   6 import gr.grnet.pithos.web.client.commands.EmptyTrashCommand;
   7 import gr.grnet.pithos.web.client.commands.NewFolderCommand;
   8 import gr.grnet.pithos.web.client.commands.PropertiesCommand;
   9 import gr.grnet.pithos.web.client.commands.RefreshCommand;
  10 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  11 import gr.grnet.pithos.web.client.rest.RestCommand;
  12 import gr.grnet.pithos.web.client.rest.resource.FileResource;
  13 import gr.grnet.pithos.web.client.rest.resource.OtherUserResource;
  14 import gr.grnet.pithos.web.client.rest.resource.OthersResource;
  15 import gr.grnet.pithos.web.client.rest.resource.RestResource;
  16 import gr.grnet.pithos.web.client.rest.resource.SharedResource;
  17 import gr.grnet.pithos.web.client.rest.resource.TrashFolderResource;
  18 import gr.grnet.pithos.web.client.rest.resource.TrashResource;
  19
  20 import java.util.List;
  21
  22 import com.google.gwt.event.dom.client.ClickEvent;
  23 import com.google.gwt.event.dom.client.ClickHandler;
  24 import com.google.gwt.http.client.URL;
  25 import com.google.gwt.resources.client.ClientBundle;
  26 import com.google.gwt.resources.client.ImageResource;
  27 import com.google.gwt.user.client.Command;
  28 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  29 import com.google.gwt.user.client.ui.MenuBar;
  30 import com.google.gwt.user.client.ui.MenuItem;
  31 import com.google.gwt.user.client.ui.PopupPanel;
  32
  33 /**
  34  * The 'File' menu implementation.
  35  */
  36 public class FileMenu extends PopupPanel implements ClickHandler {
  37
  38         /**
  39          * The widget's images.
  40          */
  41         private final Images images;
  42
  43         /**
  44          * An image bundle for this widgets images.
  45          */
  46         public interface Images extends ClientBundle,FilePropertiesDialog.Images {
  47
  48                 @Source("gr/grnet/pithos/resources/folder_new.png")
  49                 ImageResource folderNew();
  50
  51                 @Source("gr/grnet/pithos/resources/folder_outbox.png")
  52                 ImageResource fileUpdate();
  53
  54                 @Source("gr/grnet/pithos/resources/view_text.png")
  55                 ImageResource viewText();
  56
  57                 @Override
  58                 @Source("gr/grnet/pithos/resources/folder_inbox.png")
  59                 ImageResource download();
  60
  61                 @Source("gr/grnet/pithos/resources/trashcan_empty.png")
  62                 ImageResource emptyTrash();
  63
  64                 @Source("gr/grnet/pithos/resources/internet.png")
  65                 ImageResource sharing();
  66
  67                 @Source("gr/grnet/pithos/resources/refresh.png")
  68                 ImageResource refresh();
  69 }
  70
  71         final MenuBar contextMenu = new MenuBar(true);
  72
  73         /**
  74          * The widget's constructor.
  75          *
  76          * @param _images the image bundle passed on by the parent object
  77          */
  78         public FileMenu(final Images _images) {
  79                 // The popup's constructor's argument is a boolean specifying that it
  80                 // auto-close itself when the user clicks outside of it.
  81                 super(true);
  82                 setAnimationEnabled(true);
  83                 images = _images;
  84                 add(contextMenu);
  85
  86         }
  87
  88         @Override
  89         public void onClick(ClickEvent event) {
  90                 final FileMenu menu = new FileMenu(images);
  91                 final int left = event.getRelativeElement().getAbsoluteLeft();
  92                 final int top = event.getRelativeElement().getAbsoluteTop() + event.getRelativeElement().getOffsetHeight();
  93                 menu.setPopupPosition(left, top);
  94                 menu.show();
  95
  96         }
  97
  98
  99         /**
 100          * Do some validation before downloading a file.
 101          */
 102         void preDownloadCheck() {
 103                 Object selection = GSS.get().getCurrentSelection();
 104                 if (selection == null || !(selection instanceof FileResource)) {
 105                         GSS.get().displayError("You have to select a file first");
 106                         return;
 107                 }
 108         }
 109
 110         /**
 111          * Create a download link for the respective menu item, if the currently
 112          * selected object is a file.
 113          *
 114          * @param link a String array with two elements that is modified so that the
 115          *            first position contains the opening tag and the second one the
 116          *            closing tag
 117          * @param forceDownload If true, link will be such that browser should ask for filename
 118          *                              and save location
 119          */
 120         void createDownloadLink(String[] link, boolean forceDownload) {
 121                 String downloadURL = getDownloadURL();
 122                 if (!downloadURL.isEmpty()) {
 123                         link[0] = "<a id ='topMenu.file.download' class='hidden-link' href='" + downloadURL
 124                                         + (forceDownload ? "&dl=1" : "") + "' target='_blank'>";
 125                         link[1] = "</a>";
 126                 }
 127         }
 128
 129         public String getDownloadURL() {
 130                 GSS app = GSS.get();
 131                 Object selection = app.getCurrentSelection();
 132                 if (selection != null && selection instanceof FileResource) {
 133                         FileResource file = (FileResource) selection;
 134                         return getDownloadURL(file);
 135                 }
 136                 return "";
 137         }
 138
 139         public String getDownloadURL(FileResource file) {
 140                 GSS app = GSS.get();
 141                 if (file != null) {
 142                         String dateString = RestCommand.getDate();
 143                         String resource = file.getUri().substring(app.getApiPath().length()-1,file.getUri().length());
 144                         String sig = app.getCurrentUserResource().getUsername()+" "+RestCommand.calculateSig("GET", dateString, resource, RestCommand.base64decode(app.getToken()));
 145                         return file.getUri() + "?Authorization=" + URL.encodeComponent(sig) + "&Date="+URL.encodeComponent(dateString);
 146                 }
 147                 return "";
 148         }
 149
 150         public MenuBar createMenu() {
 151                 contextMenu.clearItems();
 152                 contextMenu.setAutoOpen(false);
 153                 final Command downloadCmd = new Command() {
 154
 155                         @Override
 156                         public void execute() {
 157                                 hide();
 158                                 preDownloadCheck();
 159                         }
 160                 };
 161         CellTreeView treeView = GSS.get().getTreeView();
 162         if (treeView == null)
 163             return contextMenu;
 164                 RestResource selectedItem = treeView.getSelection();
 165                 boolean downloadVisible = GSS.get().getCurrentSelection() != null && GSS.get().getCurrentSelection() instanceof FileResource;
 166                 boolean propertiesVisible = !(selectedItem != null && (selectedItem instanceof TrashResource || selectedItem instanceof TrashFolderResource || selectedItem instanceof SharedResource || selectedItem instanceof OthersResource || selectedItem instanceof OtherUserResource
 167                                         //|| folders.isOthersShared(selectedItem) || selectedItem.getUserObject() instanceof GroupUserResource
 168                                         || GSS.get().getCurrentSelection() instanceof List));
 169                 boolean newFolderVisible = !(selectedItem != null && (selectedItem instanceof TrashResource || selectedItem instanceof TrashFolderResource || selectedItem instanceof SharedResource || selectedItem instanceof OthersResource || selectedItem instanceof OtherUserResource));
 170                 boolean uploadVisible = !(selectedItem != null && (selectedItem instanceof TrashResource || selectedItem instanceof TrashFolderResource || selectedItem instanceof SharedResource || selectedItem instanceof OthersResource || selectedItem instanceof OtherUserResource));
 171                 if(newFolderVisible){
 172                         MenuItem newFolderItem = new MenuItem("<span>" + AbstractImagePrototype.create(images.folderNew()).getHTML() + "&nbsp;New Folder</span>", true, new NewFolderCommand(this, images));
 173                         newFolderItem.getElement().setId("topMenu.file.newFolder");
 174                         contextMenu.addItem(newFolderItem);
 175                 }
 176                 if(uploadVisible){
 177                         MenuItem uploadItem = new MenuItem("<span id='topMenu.file.upload'>" + AbstractImagePrototype.create(images.fileUpdate()).getHTML() + "&nbsp;Upload</span>", true, new UploadFileCommand(this));
 178                         contextMenu.addItem(uploadItem);
 179                 }
 180                 if (downloadVisible) {
 181                         String[] link = {"", ""};
 182                         createDownloadLink(link, false);
 183
 184                         MenuItem downloadItem = new MenuItem("<span>" + link[0] + AbstractImagePrototype.create(images.download()).getHTML() + "&nbsp;Download" + link[1] + "</span>", true, downloadCmd);
 185                         contextMenu.addItem(downloadItem);
 186
 187                         createDownloadLink(link, true);
 188
 189                         MenuItem saveAsItem = new MenuItem("<span>" + link[0] + AbstractImagePrototype.create(images.download()).getHTML() + "&nbsp;Save As" + link[1] + "</span>", true, downloadCmd);
 190                         contextMenu.addItem(saveAsItem);
 191                 }
 192                 MenuItem emptyTrashItem = new MenuItem("<span>" + AbstractImagePrototype.create(images.emptyTrash()).getHTML() + "&nbsp;Empty Trash</span>", true, new EmptyTrashCommand(this));
 193                 emptyTrashItem.getElement().setId("topMenu.file.emptyTrash");
 194                 contextMenu.addItem(emptyTrashItem);
 195
 196                 MenuItem refreshItem = new MenuItem("<span>" + AbstractImagePrototype.create(images.refresh()).getHTML() + "&nbsp;Refresh</span>", true, new RefreshCommand(this, images));
 197                 refreshItem.getElement().setId("topMenu.file.refresh");
 198                 contextMenu.addItem(refreshItem);
 199
 200                 MenuItem sharingItem = new MenuItem("<span>" + AbstractImagePrototype.create(images.sharing()).getHTML() + "&nbsp;Sharing</span>", true, new PropertiesCommand(this, images, 1));
 201                 sharingItem.getElement().setId("topMenu.file.sharing");
 202                 contextMenu.addItem(sharingItem)
 203                                         .setVisible(propertiesVisible);
 204
 205                 MenuItem propertiesItem = new MenuItem("<span>" + AbstractImagePrototype.create(images.viewText()).getHTML() + "&nbsp;Properties</span>", true, new PropertiesCommand(this, images, 0));
 206                 propertiesItem.getElement().setId("topMenu.file.properties");
 207                 contextMenu.addItem(propertiesItem)
 208                                         .setVisible(propertiesVisible);
 209                 return contextMenu;
 210         }
 211
 212 }