code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/FileMenu.java

   1 /*\r
   2  * Copyright 2007, 2008, 2009, 2010 Electronic Business Systems Ltd.\r
   3  *\r
   4  * This file is part of GSS.\r
   5  *\r
   6  * GSS is free software: you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation, either version 3 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * GSS is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.\r
  18  */\r
  19 package gr.ebs.gss.client;\r
  20 \r
  21 import gr.ebs.gss.client.commands.EmptyTrashCommand;\r
  22 import gr.ebs.gss.client.commands.NewFolderCommand;\r
  23 import gr.ebs.gss.client.commands.PropertiesCommand;\r
  24 import gr.ebs.gss.client.commands.RefreshCommand;\r
  25 import gr.ebs.gss.client.commands.UploadFileCommand;\r
  26 import gr.ebs.gss.client.rest.RestCommand;\r
  27 import gr.ebs.gss.client.rest.resource.FileResource;\r
  28 import gr.ebs.gss.client.rest.resource.GroupUserResource;\r
  29 \r
  30 import java.util.List;\r
  31 \r
  32 import com.google.gwt.event.dom.client.ClickEvent;\r
  33 import com.google.gwt.event.dom.client.ClickHandler;\r
  34 import com.google.gwt.http.client.URL;\r
  35 import com.google.gwt.resources.client.ClientBundle;\r
  36 import com.google.gwt.resources.client.ImageResource;\r
  37 import com.google.gwt.user.client.Command;\r
  38 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  39 import com.google.gwt.user.client.ui.MenuBar;\r
  40 import com.google.gwt.user.client.ui.PopupPanel;\r
  41 import com.google.gwt.user.client.ui.TreeItem;\r
  42 \r
  43 /**\r
  44  * The 'File' menu implementation.\r
  45  */\r
  46 public class FileMenu extends PopupPanel implements ClickHandler {\r
  47 \r
  48         /**\r
  49          * The widget's images.\r
  50          */\r
  51         private final Images images;\r
  52 \r
  53         /**\r
  54          * An image bundle for this widgets images.\r
  55          */\r
  56         public interface Images extends ClientBundle,FilePropertiesDialog.Images {\r
  57 \r
  58                 @Source("gr/ebs/gss/resources/folder_new.png")\r
  59                 ImageResource folderNew();\r
  60 \r
  61                 @Source("gr/ebs/gss/resources/folder_outbox.png")\r
  62                 ImageResource fileUpdate();\r
  63 \r
  64                 @Source("gr/ebs/gss/resources/view_text.png")\r
  65                 ImageResource viewText();\r
  66 \r
  67                 @Source("gr/ebs/gss/resources/folder_inbox.png")\r
  68                 ImageResource download();\r
  69 \r
  70                 @Source("gr/ebs/gss/resources/trashcan_empty.png")\r
  71                 ImageResource emptyTrash();\r
  72 \r
  73                 @Source("gr/ebs/gss/resources/internet.png")\r
  74                 ImageResource sharing();\r
  75 \r
  76                 @Source("gr/ebs/gss/resources/refresh.png")\r
  77                 ImageResource refresh();\r
  78 }\r
  79 \r
  80         final MenuBar contextMenu = new MenuBar(true);\r
  81 \r
  82         /**\r
  83          * The widget's constructor.\r
  84          *\r
  85          * @param _images the image bundle passed on by the parent object\r
  86          */\r
  87         public FileMenu(final Images _images) {\r
  88                 // The popup's constructor's argument is a boolean specifying that it\r
  89                 // auto-close itself when the user clicks outside of it.\r
  90                 super(true);\r
  91                 setAnimationEnabled(true);\r
  92                 images = _images;\r
  93                 add(contextMenu);\r
  94 \r
  95         }\r
  96 \r
  97         @Override\r
  98         public void onClick(ClickEvent event) {\r
  99                 final FileMenu menu = new FileMenu(images);\r
 100                 final int left = event.getRelativeElement().getAbsoluteLeft();\r
 101                 final int top = event.getRelativeElement().getAbsoluteTop() + event.getRelativeElement().getOffsetHeight();\r
 102                 menu.setPopupPosition(left, top);\r
 103                 menu.show();\r
 104 \r
 105         }\r
 106 \r
 107 \r
 108         /**\r
 109          * Do some validation before downloading a file.\r
 110          */\r
 111         void preDownloadCheck() {\r
 112                 Object selection = GSS.get().getCurrentSelection();\r
 113                 if (selection == null || !(selection instanceof FileResource)) {\r
 114                         GSS.get().displayError("You have to select a file first");\r
 115                         return;\r
 116                 }\r
 117         }\r
 118 \r
 119         /**\r
 120          * Create a download link for the respective menu item, if the currently\r
 121          * selected object is a file.\r
 122          *\r
 123          * @param link a String array with two elements that is modified so that the\r
 124          *            first position contains the opening tag and the second one the\r
 125          *            closing tag\r
 126          * @param forceDownload If true, link will be such that browser should ask for filename\r
 127          *                              and save location\r
 128          */\r
 129         void createDownloadLink(String[] link, boolean forceDownload) {\r
 130                 String downloadURL = getDownloadURL();\r
 131                 if (!downloadURL.isEmpty()) {\r
 132                         link[0] = "<a class='hidden-link' href='" + downloadURL\r
 133                                         + (forceDownload ? "&dl=1" : "") + "' target='_blank'>";\r
 134                         link[1] = "</a>";\r
 135                 }\r
 136         }\r
 137 \r
 138         public String getDownloadURL() {\r
 139                 GSS app = GSS.get();\r
 140                 Object selection = app.getCurrentSelection();\r
 141                 if (selection != null && selection instanceof FileResource) {\r
 142                         FileResource file = (FileResource) selection;\r
 143                         return getDownloadURL(file);\r
 144                 }\r
 145                 return "";\r
 146         }\r
 147 \r
 148         public String getDownloadURL(FileResource file) {\r
 149                 GSS app = GSS.get();\r
 150                 if (file != null) {\r
 151                         String dateString = RestCommand.getDate();\r
 152                         String resource = file.getUri().substring(app.getApiPath().length()-1,file.getUri().length());\r
 153                         String sig = app.getCurrentUserResource().getUsername()+" "+RestCommand.calculateSig("GET", dateString, resource, RestCommand.base64decode(app.getToken()));\r
 154                         return file.getUri() + "?Authorization=" + URL.encodeComponent(sig) + "&Date="+URL.encodeComponent(dateString);\r
 155                 }\r
 156                 return "";\r
 157         }\r
 158 \r
 159         public MenuBar createMenu() {\r
 160                 contextMenu.clearItems();\r
 161                 contextMenu.setAutoOpen(false);\r
 162                 final Command downloadCmd = new Command() {\r
 163 \r
 164                         public void execute() {\r
 165                                 hide();\r
 166                                 preDownloadCheck();\r
 167                         }\r
 168                 };\r
 169                 Folders folders = GSS.get().getFolders();\r
 170                 TreeItem selectedItem = folders.getCurrent();\r
 171                 boolean downloadVisible = GSS.get().getCurrentSelection() != null && GSS.get().getCurrentSelection() instanceof FileResource;\r
 172                 boolean propertiesVisible = !(selectedItem != null && (folders.isTrash(selectedItem) || folders.isMyShares(selectedItem) || folders.isOthersShared(selectedItem) || selectedItem.getUserObject() instanceof GroupUserResource || GSS.get().getCurrentSelection() instanceof List));\r
 173                 boolean newFolderVisible = !(selectedItem != null && (folders.isTrash(selectedItem) || folders.isTrashItem(selectedItem) || folders.isMyShares(selectedItem)|| folders.isOthersShared(selectedItem)));\r
 174                 boolean uploadVisible = !(selectedItem != null && (folders.isTrash(selectedItem) || folders.isTrashItem(selectedItem)|| folders.isMyShares(selectedItem)|| folders.isOthersShared(selectedItem)));\r
 175                 if(newFolderVisible)\r
 176                         contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.folderNew()).getHTML() + "&nbsp;New Folder</span>", true, new NewFolderCommand(this, images));\r
 177                 if(uploadVisible)\r
 178                         contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.fileUpdate()).getHTML() + "&nbsp;Upload</span>", true, new UploadFileCommand(this));\r
 179                 if (downloadVisible) {\r
 180                         String[] link = {"", ""};\r
 181                         createDownloadLink(link, false);\r
 182                         contextMenu.addItem("<span>" + link[0] + AbstractImagePrototype.create(images.download()).getHTML() + "&nbsp;Download" + link[1] + "</span>", true, downloadCmd);\r
 183                         createDownloadLink(link, true);\r
 184                         contextMenu.addItem("<span>" + link[0] + AbstractImagePrototype.create(images.download()).getHTML() + "&nbsp;Save As" + link[1] + "</span>", true, downloadCmd);\r
 185                 }\r
 186                 contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.emptyTrash()).getHTML() + "&nbsp;Empty Trash</span>", true, new EmptyTrashCommand(this));\r
 187                 contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.refresh()).getHTML() + "&nbsp;Refresh</span>", true, new RefreshCommand(this, images));\r
 188                 contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.sharing()).getHTML() + "&nbsp;Sharing</span>", true, new PropertiesCommand(this, images, 1))\r
 189                                         .setVisible(propertiesVisible);\r
 190                 contextMenu.addItem("<span>" + AbstractImagePrototype.create(images.viewText()).getHTML() + "&nbsp;Properties</span>", true, new PropertiesCommand(this, images, 0))\r
 191                                         .setVisible(propertiesVisible);\r
 192                 return contextMenu;\r
 193         }\r
 194 \r
 195 }\r