code.grnet.gr Git - pithos/blob - gss/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.UploadFileCommand;\r
  25 import gr.ebs.gss.client.rest.AbstractRestCommand;\r
  26 import gr.ebs.gss.client.rest.resource.FileResource;\r
  27 import gr.ebs.gss.client.rest.resource.GroupUserResource;\r
  28 \r
  29 import com.google.gwt.http.client.URL;\r
  30 import com.google.gwt.user.client.Command;\r
  31 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  32 import com.google.gwt.user.client.ui.ClickListener;\r
  33 import com.google.gwt.user.client.ui.MenuBar;\r
  34 import com.google.gwt.user.client.ui.PopupPanel;\r
  35 import com.google.gwt.user.client.ui.TreeItem;\r
  36 import com.google.gwt.user.client.ui.Widget;\r
  37 \r
  38 /**\r
  39  * The 'File' menu implementation.\r
  40  */\r
  41 public class FileMenu extends PopupPanel implements ClickListener {\r
  42 \r
  43         /**\r
  44          * The path info portion of the URL that provides the file download service.\r
  45          */\r
  46         static final String FILE_DOWNLOAD_PATH = "/gss/fileDownload";\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 FilePropertiesDialog.Images {\r
  57 \r
  58                 /**\r
  59                  * Will bundle the file 'folder_new.png' residing in the package\r
  60                  * 'gr.ebs.gss.resources'.\r
  61                  *\r
  62                  * @return the image prototype\r
  63                  */\r
  64                 @Resource("gr/ebs/gss/resources/folder_new.png")\r
  65                 AbstractImagePrototype folderNew();\r
  66 \r
  67                 /**\r
  68                  * Will bundle the file 'filenew.png' residing in the package\r
  69                  * 'gr.ebs.gss.resources'.\r
  70                  *\r
  71                  * @return the image prototype\r
  72                  */\r
  73                 @Resource("gr/ebs/gss/resources/filenew.png")\r
  74                 AbstractImagePrototype fileNew();\r
  75 \r
  76                 /**\r
  77                  * Will bundle the file 'update.png' residing in the package\r
  78                  * 'gr.ebs.gss.resources'.\r
  79                  *\r
  80                  * @return the image prototype\r
  81                  */\r
  82                 @Resource("gr/ebs/gss/resources/update.png")\r
  83                 AbstractImagePrototype fileUpdate();\r
  84 \r
  85                 /**\r
  86                  * Will bundle the file 'view_text.png' residing in the package\r
  87                  * 'gr.ebs.gss.resources'.\r
  88                  *\r
  89                  * @return the image prototype\r
  90                  */\r
  91                 @Resource("gr/ebs/gss/resources/view_text.png")\r
  92                 AbstractImagePrototype viewText();\r
  93 \r
  94                 /**\r
  95                  * Will bundle the file 'download_manager.png' residing in the package\r
  96                  * 'gr.ebs.gss.resources'.\r
  97                  *\r
  98                  * @return the image prototype\r
  99                  */\r
 100                 @Resource("gr/ebs/gss/resources/download_manager.png")\r
 101                 AbstractImagePrototype download();\r
 102 \r
 103                 /**\r
 104                  * Will bundle the file 'trashcan_empty.png' residing in the package\r
 105                  * 'gr.ebs.gss.resources'.\r
 106                  *\r
 107                  * @return the image prototype\r
 108                  */\r
 109                 @Resource("gr/ebs/gss/resources/trashcan_empty.png")\r
 110                 AbstractImagePrototype emptyTrash();\r
 111         }\r
 112 \r
 113         final MenuBar contextMenu = new MenuBar(true);\r
 114 \r
 115         /**\r
 116          * The widget's constructor.\r
 117          *\r
 118          * @param _images the image bundle passed on by the parent object\r
 119          */\r
 120         public FileMenu(final Images _images) {\r
 121                 // The popup's constructor's argument is a boolean specifying that it\r
 122                 // auto-close itself when the user clicks outside of it.\r
 123                 super(true);\r
 124                 setAnimationEnabled(true);\r
 125                 images = _images;\r
 126                 // createMenu();\r
 127                 add(contextMenu);\r
 128 \r
 129         }\r
 130 \r
 131         /*\r
 132          * (non-Javadoc)\r
 133          *\r
 134          * @see com.google.gwt.user.client.ui.ClickListener#onClick(com.google.gwt.user.client.ui.Widget)\r
 135          */\r
 136         public void onClick(final Widget sender) {\r
 137                 final FileMenu menu = new FileMenu(images);\r
 138                 final int left = sender.getAbsoluteLeft();\r
 139                 final int top = sender.getAbsoluteTop() + sender.getOffsetHeight();\r
 140                 menu.setPopupPosition(left, top);\r
 141 \r
 142                 menu.show();\r
 143         }\r
 144 \r
 145         /**\r
 146          * Do some validation before downloading a file.\r
 147          */\r
 148         void preDownloadCheck() {\r
 149                 Object selection = GSS.get().getCurrentSelection();\r
 150                 if (selection == null || !(selection instanceof FileResource)) {\r
 151                         GSS.get().displayError("You have to select a file first");\r
 152                         return;\r
 153                 }\r
 154         }\r
 155 \r
 156         /**\r
 157          * Create a download link for the respective menu item, if the currently\r
 158          * selected object is a file.\r
 159          *\r
 160          * @param link a String array with two elements that is modified so that the\r
 161          *            first position contains the opening tag and the second one the\r
 162          *            closing tag\r
 163          */\r
 164         void createDownloadLink(String[] link) {\r
 165                 Object selection = GSS.get().getCurrentSelection();\r
 166                 if (selection != null && selection instanceof FileResource) {\r
 167                         FileResource file = (FileResource) selection;\r
 168                         String dateString = AbstractRestCommand.getDate();\r
 169                         String resource = file.getPath().substring(GSS.GSS_REST_PATH.length()-1,file.getPath().length());\r
 170                         String sig = GSS.get().getCurrentUserResource().getUsername()+" "+AbstractRestCommand.calculateSig("GET", dateString, resource, AbstractRestCommand.base64decode(GSS.get().getToken()));\r
 171                         link[0] = "<a class='hidden-link' href='" + file.getPath() + "?Authorization=" + URL.encodeComponent(sig) + "&Date="+URL.encodeComponent(dateString) + "' target='_blank'>";\r
 172                         link[1] = "</a>";\r
 173                 }\r
 174         }\r
 175 \r
 176         public MenuBar createMenu() {\r
 177                 contextMenu.clearItems();\r
 178                 contextMenu.setAutoOpen(false);\r
 179                 final Command downloadCmd = new Command() {\r
 180 \r
 181                         public void execute() {\r
 182                                 hide();\r
 183                                 preDownloadCheck();\r
 184                         }\r
 185                 };\r
 186                 Folders folders = GSS.get().getFolders();\r
 187                 TreeItem selectedItem = folders.getCurrent();\r
 188                 boolean downloadVisible = GSS.get().getCurrentSelection() != null && GSS.get().getCurrentSelection() instanceof FileResource;\r
 189                 boolean propertiesNotVisible = selectedItem != null && (folders.isTrash(selectedItem) || folders.isMyShares(selectedItem) || folders.isOthersShared(selectedItem) || selectedItem.getUserObject() instanceof GroupUserResource);\r
 190                 contextMenu.addItem("<span>" + images.folderNew().getHTML() + "&nbsp;New Folder</span>", true, new NewFolderCommand(this, images));\r
 191                 contextMenu.addItem("<span>" + images.fileNew().getHTML() + "&nbsp;Upload</span>", true, new UploadFileCommand(this, images));\r
 192                 contextMenu     .addItem("<span>" + images.viewText().getHTML() + "&nbsp;Properties</span>", true, new PropertiesCommand(this, images))\r
 193                                         .setVisible(!propertiesNotVisible);\r
 194                 contextMenu.addItem("<span>" + images.emptyTrash().getHTML() + "&nbsp;Empty Trash</span>", true, new EmptyTrashCommand(this));\r
 195                 if (downloadVisible) {\r
 196                         String[] link = {"", ""};\r
 197                         createDownloadLink(link);\r
 198                         contextMenu.addItem("<span>" + link[0] + images.download().getHTML() + "&nbsp;Download" + link[1] + "</span>", true, downloadCmd);\r
 199                 }\r
 200                 return contextMenu;\r
 201         }\r
 202 \r
 203 }\r