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

   1 /*\r
   2  * Copyright 2007, 2008, 2009 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 com.google.gwt.http.client.URL;\r
  31 import com.google.gwt.user.client.Command;\r
  32 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  33 import com.google.gwt.user.client.ui.ClickListener;\r
  34 import com.google.gwt.user.client.ui.MenuBar;\r
  35 import com.google.gwt.user.client.ui.PopupPanel;\r
  36 import com.google.gwt.user.client.ui.TreeItem;\r
  37 import com.google.gwt.user.client.ui.Widget;\r
  38 \r
  39 /**\r
  40  * The 'File' menu implementation.\r
  41  */\r
  42 public class FileMenu extends PopupPanel implements ClickListener {\r
  43 \r
  44         /**\r
  45          * The widget's images.\r
  46          */\r
  47         private final Images images;\r
  48 \r
  49         /**\r
  50          * An image bundle for this widgets images.\r
  51          */\r
  52         public interface Images extends FilePropertiesDialog.Images {\r
  53 \r
  54                 @Resource("gr/ebs/gss/resources/folder_new.png")\r
  55                 AbstractImagePrototype folderNew();\r
  56 \r
  57                 @Resource("gr/ebs/gss/resources/folder_outbox.png")\r
  58                 AbstractImagePrototype fileUpdate();\r
  59 \r
  60                 @Resource("gr/ebs/gss/resources/view_text.png")\r
  61                 AbstractImagePrototype viewText();\r
  62 \r
  63                 @Resource("gr/ebs/gss/resources/folder_inbox.png")\r
  64                 AbstractImagePrototype download();\r
  65 \r
  66                 @Resource("gr/ebs/gss/resources/trashcan_empty.png")\r
  67                 AbstractImagePrototype emptyTrash();\r
  68 \r
  69                 @Resource("gr/ebs/gss/resources/internet.png")\r
  70                 AbstractImagePrototype sharing();\r
  71 \r
  72                 @Resource("gr/ebs/gss/resources/refresh.png")\r
  73                 AbstractImagePrototype refresh();\r
  74 }\r
  75 \r
  76         final MenuBar contextMenu = new MenuBar(true);\r
  77 \r
  78         /**\r
  79          * The widget's constructor.\r
  80          *\r
  81          * @param _images the image bundle passed on by the parent object\r
  82          */\r
  83         public FileMenu(final Images _images) {\r
  84                 // The popup's constructor's argument is a boolean specifying that it\r
  85                 // auto-close itself when the user clicks outside of it.\r
  86                 super(true);\r
  87                 setAnimationEnabled(true);\r
  88                 images = _images;\r
  89                 add(contextMenu);\r
  90 \r
  91         }\r
  92 \r
  93         public void onClick(final Widget sender) {\r
  94                 final FileMenu menu = new FileMenu(images);\r
  95                 final int left = sender.getAbsoluteLeft();\r
  96                 final int top = sender.getAbsoluteTop() + sender.getOffsetHeight();\r
  97                 menu.setPopupPosition(left, top);\r
  98                 menu.show();\r
  99         }\r
 100 \r
 101         /**\r
 102          * Do some validation before downloading a file.\r
 103          */\r
 104         void preDownloadCheck() {\r
 105                 Object selection = GSS.get().getCurrentSelection();\r
 106                 if (selection == null || !(selection instanceof FileResource)) {\r
 107                         GSS.get().displayError("You have to select a file first");\r
 108                         return;\r
 109                 }\r
 110         }\r
 111 \r
 112         /**\r
 113          * Create a download link for the respective menu item, if the currently\r
 114          * selected object is a file.\r
 115          *\r
 116          * @param link a String array with two elements that is modified so that the\r
 117          *            first position contains the opening tag and the second one the\r
 118          *            closing tag\r
 119          * @param forceDownload If true, link will be such that browser should ask for filename\r
 120          *                              and save location\r
 121          */\r
 122         void createDownloadLink(String[] link, boolean forceDownload) {\r
 123                 String downloadURL = getDownloadURL();\r
 124                 if (!downloadURL.isEmpty()) {\r
 125                         link[0] = "<a class='hidden-link' href='" + downloadURL\r
 126                                         + (forceDownload ? "&dl=1" : "") + "' target='_blank'>";\r
 127                         link[1] = "</a>";\r
 128                 }\r
 129         }\r
 130 \r
 131         public String getDownloadURL() {\r
 132                 GSS app = GSS.get();\r
 133                 Object selection = app.getCurrentSelection();\r
 134                 if (selection != null && selection instanceof FileResource) {\r
 135                         FileResource file = (FileResource) selection;\r
 136                         return getDownloadURL(file);\r
 137                 }\r
 138                 return "";\r
 139         }\r
 140 \r
 141         public String getDownloadURL(FileResource file) {\r
 142                 GSS app = GSS.get();\r
 143                 if (file != null) {\r
 144                         String dateString = RestCommand.getDate();\r
 145                         String resource = file.getUri().substring(app.getApiPath().length()-1,file.getUri().length());\r
 146                         String sig = app.getCurrentUserResource().getUsername()+" "+RestCommand.calculateSig("GET", dateString, resource, RestCommand.base64decode(app.getToken()));\r
 147                         return file.getUri() + "?Authorization=" + URL.encodeComponent(sig) + "&Date="+URL.encodeComponent(dateString);\r
 148                 }\r
 149                 return "";\r
 150         }\r
 151 \r
 152         public MenuBar createMenu() {\r
 153                 contextMenu.clearItems();\r
 154                 contextMenu.setAutoOpen(false);\r
 155                 final Command downloadCmd = new Command() {\r
 156 \r
 157                         public void execute() {\r
 158                                 hide();\r
 159                                 preDownloadCheck();\r
 160                         }\r
 161                 };\r
 162                 Folders folders = GSS.get().getFolders();\r
 163                 TreeItem selectedItem = folders.getCurrent();\r
 164                 boolean downloadVisible = GSS.get().getCurrentSelection() != null && GSS.get().getCurrentSelection() instanceof FileResource;\r
 165                 boolean propertiesVisible = !(selectedItem != null && (folders.isTrash(selectedItem) || folders.isMyShares(selectedItem) || folders.isOthersShared(selectedItem) || selectedItem.getUserObject() instanceof GroupUserResource)) && downloadVisible;\r
 166                 contextMenu.addItem("<span>" + images.folderNew().getHTML() + "&nbsp;New Folder</span>", true, new NewFolderCommand(this, images));\r
 167                 contextMenu.addItem("<span>" + images.fileUpdate().getHTML() + "&nbsp;Upload</span>", true, new UploadFileCommand(this));\r
 168                 if (downloadVisible) {\r
 169                         String[] link = {"", ""};\r
 170                         createDownloadLink(link, false);\r
 171                         contextMenu.addItem("<span>" + link[0] + images.download().getHTML() + "&nbsp;Download" + link[1] + "</span>", true, downloadCmd);\r
 172                         createDownloadLink(link, true);\r
 173                         contextMenu.addItem("<span>" + link[0] + images.download().getHTML() + "&nbsp;Save As" + link[1] + "</span>", true, downloadCmd);\r
 174                 }\r
 175                 contextMenu.addItem("<span>" + images.emptyTrash().getHTML() + "&nbsp;Empty Trash</span>", true, new EmptyTrashCommand(this));\r
 176                 contextMenu.addItem("<span>" + images.refresh().getHTML() + "&nbsp;Refresh</span>", true, new RefreshCommand(this, images));\r
 177                 contextMenu.addItem("<span>" + images.sharing().getHTML() + "&nbsp;Sharing</span>", true, new PropertiesCommand(this, images, 1))\r
 178                                         .setVisible(propertiesVisible);\r
 179                 contextMenu.addItem("<span>" + images.viewText().getHTML() + "&nbsp;Properties</span>", true, new PropertiesCommand(this, images, 0))\r
 180                                         .setVisible(propertiesVisible);\r
 181                 return contextMenu;\r
 182         }\r
 183 \r
 184 }\r