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

   1 /*
   2  * Copyright 2011 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35 package gr.grnet.pithos.web.client;
  36
  37 import gr.grnet.pithos.web.client.foldertree.File;
  38 import gr.grnet.pithos.web.client.foldertree.Folder;
  39
  40 import com.google.gwt.core.client.GWT;
  41 import com.google.gwt.dom.client.NativeEvent;
  42 import com.google.gwt.event.dom.client.ClickEvent;
  43 import com.google.gwt.event.dom.client.ClickHandler;
  44 import com.google.gwt.event.dom.client.KeyCodes;
  45 import com.google.gwt.user.client.Command;
  46 import com.google.gwt.user.client.Cookies;
  47 import com.google.gwt.user.client.Event.NativePreviewEvent;
  48 import com.google.gwt.user.client.Window;
  49 import com.google.gwt.user.client.ui.Button;
  50 import com.google.gwt.user.client.ui.DialogBox;
  51 import com.google.gwt.user.client.ui.FileUpload;
  52 import com.google.gwt.user.client.ui.FormPanel;
  53 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
  54 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
  55 import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
  56 import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
  57 import com.google.gwt.user.client.ui.Anchor;
  58 import com.google.gwt.user.client.ui.Grid;
  59 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  60 import com.google.gwt.user.client.ui.Hidden;
  61 import com.google.gwt.user.client.ui.HorizontalPanel;
  62 import com.google.gwt.user.client.ui.Label;
  63 import com.google.gwt.user.client.ui.VerticalPanel;
  64
  65 /**
  66  * The 'File upload' dialog box implementation.
  67  */
  68 public class FileUploadDialog extends DialogBox {
  69
  70     public static final boolean DONE = true;
  71
  72         /**
  73          * The Form element that performs the file upload.
  74          */
  75     protected final FormPanel form = new FormPanel();
  76
  77         private final FileUpload upload = new FileUpload();
  78
  79         private final Label filenameLabel = new Label();
  80
  81     private final Label foldernameLabel = new Label();
  82
  83     private Button submit;
  84
  85         protected Folder folder;
  86
  87     protected Pithos app;
  88
  89         /**
  90          * The widget's constructor.
  91          */
  92         public FileUploadDialog() {
  93                 Anchor close = new Anchor();
  94                 close.addStyleName("close");
  95                 close.addClickHandler(new ClickHandler() {
  96
  97                         @Override
  98                         public void onClick(ClickEvent event) {
  99                                 hide();
 100                         }
 101                 });
 102                 // Set the dialog's caption.
 103                 setText("File upload");
 104                 setAnimationEnabled(true);
 105                 setGlassEnabled(true);
 106                 setStyleName("pithos-DialogBox");
 107                 // Since we're going to add a FileUpload widget, we'll need to set the
 108                 // form to use the POST method, and multipart MIME encoding.
 109                 form.setEncoding(FormPanel.ENCODING_MULTIPART);
 110                 form.setMethod(FormPanel.METHOD_POST);
 111
 112                 // Create a panel to hold all of the form widgets.
 113                 VerticalPanel panel = new VerticalPanel();
 114                 panel.add(close);
 115                 form.setWidget(panel);
 116
 117                 VerticalPanel inner = new VerticalPanel();
 118                 inner.addStyleName("inner");
 119
 120         final Hidden auth = new Hidden("X-Auth-Token", "");
 121         inner.add(auth);
 122                 upload.setName("X-Object-Data");
 123                 filenameLabel.setText("");
 124                 filenameLabel.setVisible(false);
 125                 filenameLabel.setStyleName("props-labels");
 126                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 127                 fileUploadPanel.add(filenameLabel);
 128                 fileUploadPanel.add(upload);
 129                 Grid generalTable = new Grid(2, 2);
 130                 generalTable.setText(0, 0, "Folder");
 131         generalTable.setWidget(0, 1, foldernameLabel);
 132                 generalTable.setText(1, 0, "File");
 133                 generalTable.setWidget(1, 1, fileUploadPanel);
 134                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 135         generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 136                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 137                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 138                 generalTable.setCellSpacing(4);
 139
 140                 inner.add(generalTable);
 141
 142                 // Create the 'upload' button, along with a listener that submits the
 143                 // form.
 144                 submit = new Button("Upload", new ClickHandler() {
 145                         @Override
 146                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 147                                 prepareAndSubmit();
 148                         }
 149                 });
 150                 submit.addStyleName("button");
 151                 inner.add(submit);
 152
 153                 // Add an event handler to the form.
 154                 form.addSubmitHandler(new SubmitHandler() {
 155
 156                         @Override
 157                         public void onSubmit(@SuppressWarnings("unused") SubmitEvent event) {
 158                 auth.setValue(app.getToken()); //This is done here because the app object is not available in the constructor
 159                 Cookies.setCookie("X-Auth-Token", app.getToken(), null, Window.Location.getHostName(), app.getApiPath(), false);
 160                         }
 161                 });
 162                 form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
 163
 164                         @Override
 165                         public void onSubmitComplete(SubmitCompleteEvent event) {
 166                                 // When the form submission is successfully completed, this
 167                                 // event is fired. Assuming the service returned a response
 168                                 // of type text/html, we can get the result text here (see
 169                                 // the FormPanel documentation for further explanation).
 170                                 String results = event.getResults();
 171
 172                                 // Unfortunately the results are never empty, even in
 173                                 // the absense of errors, so we have to check for '<pre></pre>'.
 174                                 if (results != null && results.length() > 0 && !results.equalsIgnoreCase("<pre></pre>")) {
 175                                         GWT.log(results, null);
 176                                         app.displayError(results);
 177                                 }
 178                                 if (app.getSelectedTree().equals(app.getFolderTreeView()))
 179                                         app.updateFolder(folder, true, new Command() {
 180
 181                                                 @Override
 182                                                 public void execute() {
 183                                                         app.updateStatistics();
 184                                                 }
 185                                         });
 186                                 else
 187                                         app.updateOtherSharedFolder(folder, true);
 188                                 hide();
 189                         }
 190                 });
 191
 192                 panel.add(inner);
 193                 panel.setCellHorizontalAlignment(inner, HasHorizontalAlignment.ALIGN_CENTER);
 194
 195                 setWidget(form);
 196         }
 197
 198         @Override
 199         protected void onPreviewNativeEvent(NativePreviewEvent preview) {
 200                 super.onPreviewNativeEvent(preview);
 201
 202                 NativeEvent evt = preview.getNativeEvent();
 203                 if (evt.getType().equals("keydown"))
 204                         // Use the popup's key preview hooks to close the dialog when either
 205                         // enter or escape is pressed.
 206                         switch (evt.getKeyCode()) {
 207                                 case KeyCodes.KEY_ENTER:
 208                                         prepareAndSubmit();
 209                                         break;
 210                                 case KeyCodes.KEY_ESCAPE:
 211                                         hide();
 212                                         break;
 213                         }
 214         }
 215
 216         /**
 217          * Make any last minute checks and start the upload.
 218          */
 219         protected void prepareAndSubmit() {
 220         if (upload.getFilename().length() == 0) {
 221             app.displayError("You must select a file!");
 222             return;
 223         }
 224         final String fname = getFilename(upload.getFilename());
 225         String apath = app.getApiPath() + folder.getOwner() + folder.getUri() + "/" + fname;
 226         form.setAction(apath);
 227         submit.setEnabled(false);
 228         upload.setVisible(false);
 229         filenameLabel.setText(fname);
 230         filenameLabel.setVisible(true);
 231
 232                 if (getFileForName(fname) == null) {
 233             form.submit();
 234                 }
 235                 else {
 236                         // We are going to update an existing file, so show a confirmation dialog.
 237                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 238                                         "you want to update " + fname + "?", "Update") {
 239
 240                                 @Override
 241                                 public void cancel() {
 242                                         FileUploadDialog.this.hide();
 243                                 }
 244
 245                                 @Override
 246                                 public void confirm() {
 247                                         form.submit();
 248                                 }
 249
 250                         };
 251                         confirm.center();
 252                 }
 253         }
 254
 255     /**
 256          * Returns the file name from a potential full path argument. Apparently IE
 257          * insists on sending the full path name of a file when uploading, forcing
 258          * us to trim the extra path info. Since this is only observed on Windows we
 259          * get to check for a single path separator value.
 260          *
 261          * @param name the potentially full path name of a file
 262          * @return the file name without extra path information
 263          */
 264         protected String getFilename(String name) {
 265                 int pathSepIndex = name.lastIndexOf("\\");
 266                 if (pathSepIndex == -1) {
 267                         pathSepIndex = name.lastIndexOf("/");
 268                         if (pathSepIndex == -1)
 269                                 return name;
 270                 }
 271                 return name.substring(pathSepIndex + 1);
 272         }
 273
 274         protected File getFileForName(String name){
 275                 for (File f : folder.getFiles())
 276                         if (f.getName().equals(name))
 277                                 return f;
 278                 return null;
 279         }
 280
 281     public void setApp(Pithos app) {
 282         this.app = app;
 283     }
 284
 285     public void setFolder(Folder folder) {
 286         this.folder = folder;
 287         foldernameLabel.setText(folder.getName());
 288     }
 289 }