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.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.HTML;
  56 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  57 import com.google.gwt.user.client.ui.Hidden;
  58 import com.google.gwt.user.client.ui.HorizontalPanel;
  59 import com.google.gwt.user.client.ui.Label;
  60 import com.google.gwt.user.client.ui.VerticalPanel;
  61
  62 /**
  63  * The 'File upload' dialog box implementation.
  64  */
  65 public class FileUploadDialog extends DialogBox {
  66
  67     public static final boolean DONE = true;
  68
  69         /**
  70          * The Form element that performs the file upload.
  71          */
  72         private final FormPanel form = new FormPanel();
  73
  74         private final FileUpload upload = new FileUpload();
  75
  76         private final Label filenameLabel = new Label();
  77
  78     private final Label foldernameLabel = new Label();
  79
  80     private Button submit;
  81
  82         protected Folder folder;
  83
  84     protected Pithos app;
  85
  86         /**
  87          * The widget's constructor.
  88          */
  89         public FileUploadDialog() {
  90                 // Set the dialog's caption.
  91                 setText("File upload");
  92                 setAnimationEnabled(true);
  93                 // Since we're going to add a FileUpload widget, we'll need to set the
  94                 // form to use the POST method, and multipart MIME encoding.
  95                 form.setEncoding(FormPanel.ENCODING_MULTIPART);
  96                 form.setMethod(FormPanel.METHOD_POST);
  97
  98                 // Create a panel to hold all of the form widgets.
  99                 VerticalPanel panel = new VerticalPanel();
 100                 form.setWidget(panel);
 101                 final HTML info = new HTML("You may select a file to upload. Install" +
 102                                 " <a href='http://gears.google.com/' target='_blank'>Google " +
 103                                 "Gears</a><br> for uploading multiple files simultaneously.");
 104                 info.addStyleName("pithos-uploadNote");
 105                 panel.add(info);
 106
 107         final Hidden auth = new Hidden("X-Auth-Token", "");
 108         panel.add(auth);
 109                 upload.setName("X-Object-Data");
 110                 filenameLabel.setText("");
 111                 filenameLabel.setVisible(false);
 112                 filenameLabel.setStyleName("props-labels");
 113                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 114                 fileUploadPanel.add(filenameLabel);
 115                 fileUploadPanel.add(upload);
 116                 Grid generalTable = new Grid(2, 2);
 117                 generalTable.setText(0, 0, "Folder");
 118         generalTable.setWidget(0, 1, foldernameLabel);
 119                 generalTable.setText(1, 0, "File");
 120                 generalTable.setWidget(1, 1, fileUploadPanel);
 121                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 122         generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 123                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 124                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 125                 generalTable.setCellSpacing(4);
 126
 127                 panel.add(generalTable);
 128
 129                 // Create a panel to hold the buttons.
 130                 HorizontalPanel buttons = new HorizontalPanel();
 131
 132                 // Create the 'upload' button, along with a listener that submits the
 133                 // form.
 134                 submit = new Button("Upload", new ClickHandler() {
 135                         @Override
 136                         public void onClick(ClickEvent event) {
 137                                 prepareAndSubmit();
 138                         }
 139                 });
 140                 buttons.add(submit);
 141                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 142                 // Create the 'Cancel' button, along with a listener that hides the
 143                 // dialog when the button is clicked.
 144                 final Button cancel = new Button("Cancel", new ClickHandler() {
 145                         @Override
 146                         public void onClick(ClickEvent event) {
 147                                 hide();
 148                         }
 149                 });
 150                 buttons.add(cancel);
 151                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 152                 buttons.setSpacing(8);
 153                 buttons.addStyleName("pithos-DialogBox");
 154         panel.add(buttons);
 155         panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 156
 157                 // Add an event handler to the form.
 158                 form.addSubmitHandler(new SubmitHandler() {
 159
 160                         @Override
 161                         public void onSubmit(SubmitEvent event) {
 162                 auth.setValue(app.getToken()); //This is done here because the app object is not available in the constructor
 163                         }
 164                 });
 165                 form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
 166
 167                         @Override
 168                         public void onSubmitComplete(SubmitCompleteEvent event) {
 169                                 // When the form submission is successfully completed, this
 170                                 // event is fired. Assuming the service returned a response
 171                                 // of type text/html, we can get the result text here (see
 172                                 // the FormPanel documentation for further explanation).
 173                                 String results = event.getResults();
 174
 175                                 // Unfortunately the results are never empty, even in
 176                                 // the absense of errors, so we have to check for '<pre></pre>'.
 177                                 if (results != null && results.length() > 0 && !results.equalsIgnoreCase("<pre></pre>")) {
 178                                         GWT.log(results, null);
 179                                         app.displayError(results);
 180                                 }
 181                 app.updateFolder(folder);
 182                                 hide();
 183                         }
 184                 });
 185
 186
 187                 panel.addStyleName("pithos-DialogBox");
 188                 addStyleName("pithos-DialogBox");
 189                 setWidget(form);
 190         }
 191
 192         @Override
 193         protected void onPreviewNativeEvent(NativePreviewEvent preview) {
 194                 super.onPreviewNativeEvent(preview);
 195
 196                 NativeEvent evt = preview.getNativeEvent();
 197                 if (evt.getType().equals("keydown"))
 198                         // Use the popup's key preview hooks to close the dialog when either
 199                         // enter or escape is pressed.
 200                         switch (evt.getKeyCode()) {
 201                                 case KeyCodes.KEY_ENTER:
 202                                         prepareAndSubmit();
 203                                         break;
 204                                 case KeyCodes.KEY_ESCAPE:
 205                                         hide();
 206                                         break;
 207                         }
 208         }
 209
 210         /**
 211          * Make any last minute checks and start the upload.
 212          */
 213         protected void prepareAndSubmit() {
 214         if (upload.getFilename().length() == 0) {
 215             app.displayError("You must select a file!");
 216             return;
 217         }
 218         final String fname = getFilename(upload.getFilename());
 219         String apath = app.getApiPath() + app.getUsername() + folder.getUri() + "/" + fname;
 220         form.setAction(apath);
 221         submit.setEnabled(false);
 222         upload.setVisible(false);
 223         filenameLabel.setText(fname);
 224         filenameLabel.setVisible(true);
 225
 226                 if (getFileForName(fname) == null) {
 227             form.submit();
 228                 }
 229                 else {
 230                         // We are going to update an existing file, so show a confirmation dialog.
 231                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 232                                         "you want to update " + fname + "?", "Update") {
 233
 234                                 @Override
 235                                 public void cancel() {
 236                                         FileUploadDialog.this.hide();
 237                                 }
 238
 239                                 @Override
 240                                 public void confirm() {
 241                                         form.submit();
 242                                 }
 243
 244                         };
 245                         confirm.center();
 246                 }
 247         }
 248
 249     /**
 250          * Returns the file name from a potential full path argument. Apparently IE
 251          * insists on sending the full path name of a file when uploading, forcing
 252          * us to trim the extra path info. Since this is only observed on Windows we
 253          * get to check for a single path separator value.
 254          *
 255          * @param name the potentially full path name of a file
 256          * @return the file name without extra path information
 257          */
 258         protected String getFilename(String name) {
 259                 int pathSepIndex = name.lastIndexOf("\\");
 260                 if (pathSepIndex == -1) {
 261                         pathSepIndex = name.lastIndexOf("/");
 262                         if (pathSepIndex == -1)
 263                                 return name;
 264                 }
 265                 return name.substring(pathSepIndex + 1);
 266         }
 267
 268         protected File getFileForName(String name){
 269                 for (File f : folder.getFiles())
 270                         if (!f.isInTrash() && f.getName().equals(name))
 271                                 return f;
 272                 return null;
 273         }
 274
 275     public void setApp(Pithos app) {
 276         this.app = app;
 277     }
 278
 279     public void setFolder(Folder folder) {
 280         this.folder = folder;
 281         foldernameLabel.setText(folder.getName());
 282     }
 283 }