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