code.grnet.gr Git - pithos/blob - web_client/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.Event.NativePreviewEvent;
  46 import com.google.gwt.user.client.ui.Button;
  47 import com.google.gwt.user.client.ui.DialogBox;
  48 import com.google.gwt.user.client.ui.FileUpload;
  49 import com.google.gwt.user.client.ui.FormPanel;
  50 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
  51 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
  52 import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
  53 import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
  54 import com.google.gwt.user.client.ui.Grid;
  55 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  56 import com.google.gwt.user.client.ui.Hidden;
  57 import com.google.gwt.user.client.ui.HorizontalPanel;
  58 import com.google.gwt.user.client.ui.Label;
  59 import com.google.gwt.user.client.ui.VerticalPanel;
  60
  61 /**
  62  * The 'File upload' dialog box implementation.
  63  */
  64 public class FileUploadDialog extends DialogBox {
  65
  66     public static final boolean DONE = true;
  67
  68         /**
  69          * The Form element that performs the file upload.
  70          */
  71     protected final FormPanel form = new FormPanel();
  72
  73         private final FileUpload upload = new FileUpload();
  74
  75         private final Label filenameLabel = new Label();
  76
  77     private final Label foldernameLabel = new Label();
  78
  79     private Button submit;
  80
  81         protected Folder folder;
  82
  83     protected Pithos app;
  84
  85         /**
  86          * The widget's constructor.
  87          */
  88         public FileUploadDialog() {
  89                 // Set the dialog's caption.
  90                 setText("File upload");
  91                 setAnimationEnabled(true);
  92                 // Since we're going to add a FileUpload widget, we'll need to set the
  93                 // form to use the POST method, and multipart MIME encoding.
  94                 form.setEncoding(FormPanel.ENCODING_MULTIPART);
  95                 form.setMethod(FormPanel.METHOD_POST);
  96
  97                 // Create a panel to hold all of the form widgets.
  98                 VerticalPanel panel = new VerticalPanel();
  99                 form.setWidget(panel);
 100
 101         final Hidden auth = new Hidden("X-Auth-Token", "");
 102         panel.add(auth);
 103                 upload.setName("X-Object-Data");
 104                 filenameLabel.setText("");
 105                 filenameLabel.setVisible(false);
 106                 filenameLabel.setStyleName("props-labels");
 107                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 108                 fileUploadPanel.add(filenameLabel);
 109                 fileUploadPanel.add(upload);
 110                 Grid generalTable = new Grid(2, 2);
 111                 generalTable.setText(0, 0, "Folder");
 112         generalTable.setWidget(0, 1, foldernameLabel);
 113                 generalTable.setText(1, 0, "File");
 114                 generalTable.setWidget(1, 1, fileUploadPanel);
 115                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 116         generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 117                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 118                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 119                 generalTable.setCellSpacing(4);
 120
 121                 panel.add(generalTable);
 122
 123                 // Create a panel to hold the buttons.
 124                 HorizontalPanel buttons = new HorizontalPanel();
 125
 126                 // Create the 'upload' button, along with a listener that submits the
 127                 // form.
 128                 submit = new Button("Upload", new ClickHandler() {
 129                         @Override
 130                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 131                                 prepareAndSubmit();
 132                         }
 133                 });
 134                 buttons.add(submit);
 135                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 136                 // Create the 'Cancel' button, along with a listener that hides the
 137                 // dialog when the button is clicked.
 138                 final Button cancel = new Button("Cancel", new ClickHandler() {
 139                         @Override
 140                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 141                                 hide();
 142                         }
 143                 });
 144                 buttons.add(cancel);
 145                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 146                 buttons.setSpacing(8);
 147         panel.add(buttons);
 148         panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 149
 150                 // Add an event handler to the form.
 151                 form.addSubmitHandler(new SubmitHandler() {
 152
 153                         @Override
 154                         public void onSubmit(@SuppressWarnings("unused") SubmitEvent event) {
 155                 auth.setValue(app.getToken()); //This is done here because the app object is not available in the constructor
 156                         }
 157                 });
 158                 form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
 159
 160                         @Override
 161                         public void onSubmitComplete(SubmitCompleteEvent event) {
 162                                 // When the form submission is successfully completed, this
 163                                 // event is fired. Assuming the service returned a response
 164                                 // of type text/html, we can get the result text here (see
 165                                 // the FormPanel documentation for further explanation).
 166                                 String results = event.getResults();
 167
 168                                 // Unfortunately the results are never empty, even in
 169                                 // the absense of errors, so we have to check for '<pre></pre>'.
 170                                 if (results != null && results.length() > 0 && !results.equalsIgnoreCase("<pre></pre>")) {
 171                                         GWT.log(results, null);
 172                                         app.displayError(results);
 173                                 }
 174                 app.updateFolder(folder, true, null);
 175                                 hide();
 176                         }
 177                 });
 178
 179                 setWidget(form);
 180         }
 181
 182         @Override
 183         protected void onPreviewNativeEvent(NativePreviewEvent preview) {
 184                 super.onPreviewNativeEvent(preview);
 185
 186                 NativeEvent evt = preview.getNativeEvent();
 187                 if (evt.getType().equals("keydown"))
 188                         // Use the popup's key preview hooks to close the dialog when either
 189                         // enter or escape is pressed.
 190                         switch (evt.getKeyCode()) {
 191                                 case KeyCodes.KEY_ENTER:
 192                                         prepareAndSubmit();
 193                                         break;
 194                                 case KeyCodes.KEY_ESCAPE:
 195                                         hide();
 196                                         break;
 197                         }
 198         }
 199
 200         /**
 201          * Make any last minute checks and start the upload.
 202          */
 203         protected void prepareAndSubmit() {
 204         if (upload.getFilename().length() == 0) {
 205             app.displayError("You must select a file!");
 206             return;
 207         }
 208         final String fname = getFilename(upload.getFilename());
 209         String apath = app.getApiPath() + app.getUsername() + folder.getUri() + "/" + fname;
 210         form.setAction(apath);
 211         submit.setEnabled(false);
 212         upload.setVisible(false);
 213         filenameLabel.setText(fname);
 214         filenameLabel.setVisible(true);
 215
 216                 if (getFileForName(fname) == null) {
 217             form.submit();
 218                 }
 219                 else {
 220                         // We are going to update an existing file, so show a confirmation dialog.
 221                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 222                                         "you want to update " + fname + "?", "Update") {
 223
 224                                 @Override
 225                                 public void cancel() {
 226                                         FileUploadDialog.this.hide();
 227                                 }
 228
 229                                 @Override
 230                                 public void confirm() {
 231                                         form.submit();
 232                                 }
 233
 234                         };
 235                         confirm.center();
 236                 }
 237         }
 238
 239     /**
 240          * Returns the file name from a potential full path argument. Apparently IE
 241          * insists on sending the full path name of a file when uploading, forcing
 242          * us to trim the extra path info. Since this is only observed on Windows we
 243          * get to check for a single path separator value.
 244          *
 245          * @param name the potentially full path name of a file
 246          * @return the file name without extra path information
 247          */
 248         protected String getFilename(String name) {
 249                 int pathSepIndex = name.lastIndexOf("\\");
 250                 if (pathSepIndex == -1) {
 251                         pathSepIndex = name.lastIndexOf("/");
 252                         if (pathSepIndex == -1)
 253                                 return name;
 254                 }
 255                 return name.substring(pathSepIndex + 1);
 256         }
 257
 258         protected File getFileForName(String name){
 259                 for (File f : folder.getFiles())
 260                         if (f.getName().equals(name))
 261                                 return f;
 262                 return null;
 263         }
 264
 265     public void setApp(Pithos app) {
 266         this.app = app;
 267     }
 268
 269     public void setFolder(Folder folder) {
 270         this.folder = folder;
 271         foldernameLabel.setText(folder.getName());
 272     }
 273 }