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.Grid;
  58 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  59 import com.google.gwt.user.client.ui.Hidden;
  60 import com.google.gwt.user.client.ui.HorizontalPanel;
  61 import com.google.gwt.user.client.ui.Label;
  62 import com.google.gwt.user.client.ui.VerticalPanel;
  63
  64 /**
  65  * The 'File upload' dialog box implementation.
  66  */
  67 public class FileUploadDialog extends DialogBox {
  68
  69     public static final boolean DONE = true;
  70
  71         /**
  72          * The Form element that performs the file upload.
  73          */
  74     protected final FormPanel form = new FormPanel();
  75
  76         private final FileUpload upload = new FileUpload();
  77
  78         private final Label filenameLabel = new Label();
  79
  80     private final Label foldernameLabel = new Label();
  81
  82     private Button submit;
  83
  84         protected Folder folder;
  85
  86     protected Pithos app;
  87
  88         /**
  89          * The widget's constructor.
  90          */
  91         public FileUploadDialog() {
  92                 // Set the dialog's caption.
  93                 setText("File upload");
  94                 setAnimationEnabled(true);
  95                 // Since we're going to add a FileUpload widget, we'll need to set the
  96                 // form to use the POST method, and multipart MIME encoding.
  97                 form.setEncoding(FormPanel.ENCODING_MULTIPART);
  98                 form.setMethod(FormPanel.METHOD_POST);
  99
 100                 // Create a panel to hold all of the form widgets.
 101                 VerticalPanel panel = new VerticalPanel();
 102                 form.setWidget(panel);
 103
 104         final Hidden auth = new Hidden("X-Auth-Token", "");
 105         panel.add(auth);
 106                 upload.setName("X-Object-Data");
 107                 filenameLabel.setText("");
 108                 filenameLabel.setVisible(false);
 109                 filenameLabel.setStyleName("props-labels");
 110                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 111                 fileUploadPanel.add(filenameLabel);
 112                 fileUploadPanel.add(upload);
 113                 Grid generalTable = new Grid(2, 2);
 114                 generalTable.setText(0, 0, "Folder");
 115         generalTable.setWidget(0, 1, foldernameLabel);
 116                 generalTable.setText(1, 0, "File");
 117                 generalTable.setWidget(1, 1, fileUploadPanel);
 118                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 119         generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 120                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 121                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 122                 generalTable.setCellSpacing(4);
 123
 124                 panel.add(generalTable);
 125
 126                 // Create a panel to hold the buttons.
 127                 HorizontalPanel buttons = new HorizontalPanel();
 128
 129                 // Create the 'upload' button, along with a listener that submits the
 130                 // form.
 131                 submit = new Button("Upload", new ClickHandler() {
 132                         @Override
 133                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 134                                 prepareAndSubmit();
 135                         }
 136                 });
 137                 buttons.add(submit);
 138                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 139                 // Create the 'Cancel' button, along with a listener that hides the
 140                 // dialog when the button is clicked.
 141                 final Button cancel = new Button("Cancel", new ClickHandler() {
 142                         @Override
 143                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 144                                 hide();
 145                         }
 146                 });
 147                 buttons.add(cancel);
 148                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 149                 buttons.setSpacing(8);
 150         panel.add(buttons);
 151         panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 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                 setWidget(form);
 193         }
 194
 195         @Override
 196         protected void onPreviewNativeEvent(NativePreviewEvent preview) {
 197                 super.onPreviewNativeEvent(preview);
 198
 199                 NativeEvent evt = preview.getNativeEvent();
 200                 if (evt.getType().equals("keydown"))
 201                         // Use the popup's key preview hooks to close the dialog when either
 202                         // enter or escape is pressed.
 203                         switch (evt.getKeyCode()) {
 204                                 case KeyCodes.KEY_ENTER:
 205                                         prepareAndSubmit();
 206                                         break;
 207                                 case KeyCodes.KEY_ESCAPE:
 208                                         hide();
 209                                         break;
 210                         }
 211         }
 212
 213         /**
 214          * Make any last minute checks and start the upload.
 215          */
 216         protected void prepareAndSubmit() {
 217         if (upload.getFilename().length() == 0) {
 218             app.displayError("You must select a file!");
 219             return;
 220         }
 221         final String fname = getFilename(upload.getFilename());
 222         String apath = app.getApiPath() + folder.getOwner() + folder.getUri() + "/" + fname;
 223         form.setAction(apath);
 224         submit.setEnabled(false);
 225         upload.setVisible(false);
 226         filenameLabel.setText(fname);
 227         filenameLabel.setVisible(true);
 228
 229                 if (getFileForName(fname) == null) {
 230             form.submit();
 231                 }
 232                 else {
 233                         // We are going to update an existing file, so show a confirmation dialog.
 234                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 235                                         "you want to update " + fname + "?", "Update") {
 236
 237                                 @Override
 238                                 public void cancel() {
 239                                         FileUploadDialog.this.hide();
 240                                 }
 241
 242                                 @Override
 243                                 public void confirm() {
 244                                         form.submit();
 245                                 }
 246
 247                         };
 248                         confirm.center();
 249                 }
 250         }
 251
 252     /**
 253          * Returns the file name from a potential full path argument. Apparently IE
 254          * insists on sending the full path name of a file when uploading, forcing
 255          * us to trim the extra path info. Since this is only observed on Windows we
 256          * get to check for a single path separator value.
 257          *
 258          * @param name the potentially full path name of a file
 259          * @return the file name without extra path information
 260          */
 261         protected String getFilename(String name) {
 262                 int pathSepIndex = name.lastIndexOf("\\");
 263                 if (pathSepIndex == -1) {
 264                         pathSepIndex = name.lastIndexOf("/");
 265                         if (pathSepIndex == -1)
 266                                 return name;
 267                 }
 268                 return name.substring(pathSepIndex + 1);
 269         }
 270
 271         protected File getFileForName(String name){
 272                 for (File f : folder.getFiles())
 273                         if (f.getName().equals(name))
 274                                 return f;
 275                 return null;
 276         }
 277
 278     public void setApp(Pithos app) {
 279         this.app = app;
 280     }
 281
 282     public void setFolder(Folder folder) {
 283         this.folder = folder;
 284         foldernameLabel.setText(folder.getName());
 285     }
 286 }