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

   1 /*\r
   2  * Copyright 2011 GRNET S.A. All rights reserved.\r
   3  *\r
   4  * Redistribution and use in source and binary forms, with or\r
   5  * without modification, are permitted provided that the following\r
   6  * conditions are met:\r
   7  *\r
   8  *   1. Redistributions of source code must retain the above\r
   9  *      copyright notice, this list of conditions and the following\r
  10  *      disclaimer.\r
  11  *\r
  12  *   2. Redistributions in binary form must reproduce the above\r
  13  *      copyright notice, this list of conditions and the following\r
  14  *      disclaimer in the documentation and/or other materials\r
  15  *      provided with the distribution.\r
  16  *\r
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS\r
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR\r
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\r
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF\r
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\r
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN\r
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r
  28  * POSSIBILITY OF SUCH DAMAGE.\r
  29  *\r
  30  * The views and conclusions contained in the software and\r
  31  * documentation are those of the authors and should not be\r
  32  * interpreted as representing official policies, either expressed\r
  33  * or implied, of GRNET S.A.\r
  34  */\r
  35 package gr.grnet.pithos.web.client;\r
  36 \r
  37 import com.google.gwt.core.client.Scheduler;\r
  38 import gr.grnet.pithos.web.client.MessagePanel.Images;\r
  39 import gr.grnet.pithos.web.client.foldertree.File;\r
  40 import gr.grnet.pithos.web.client.foldertree.Resource;\r
  41 import gr.grnet.pithos.web.client.rest.DeleteRequest;\r
  42 import gr.grnet.pithos.web.client.rest.RestException;\r
  43 \r
  44 import java.util.Iterator;\r
  45 import java.util.List;\r
  46 \r
  47 import com.google.gwt.core.client.GWT;\r
  48 import com.google.gwt.dom.client.NativeEvent;\r
  49 import com.google.gwt.event.dom.client.ClickEvent;\r
  50 import com.google.gwt.event.dom.client.ClickHandler;\r
  51 import com.google.gwt.event.dom.client.KeyCodes;\r
  52 import com.google.gwt.user.client.Event.NativePreviewEvent;\r
  53 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  54 import com.google.gwt.user.client.ui.Button;\r
  55 import com.google.gwt.user.client.ui.DialogBox;\r
  56 import com.google.gwt.user.client.ui.HTML;\r
  57 import com.google.gwt.user.client.ui.HasHorizontalAlignment;\r
  58 import com.google.gwt.user.client.ui.HorizontalPanel;\r
  59 import com.google.gwt.user.client.ui.VerticalPanel;\r
  60 \r
  61 /**\r
  62  * The 'delete file' dialog box.\r
  63  */\r
  64 public class DeleteFileDialog extends DialogBox {\r
  65 \r
  66     private List<File> files;\r
  67 \r
  68     protected Pithos app;\r
  69 \r
  70         /**\r
  71          * The widget's constructor.\r
  72          *\r
  73          * @param images the supplied images\r
  74          */\r
  75         public DeleteFileDialog(Pithos _app, Images images, List<File> _files) {\r
  76         app = _app;\r
  77         files = _files;\r
  78                 // Set the dialog's caption.\r
  79                 setText("Confirmation");\r
  80                 setAnimationEnabled(true);\r
  81                 // Create a VerticalPanel to contain the label and the buttons.\r
  82                 VerticalPanel outer = new VerticalPanel();\r
  83                 HorizontalPanel buttons = new HorizontalPanel();\r
  84 \r
  85                 HTML text;\r
  86                 if (files.size() == 1)\r
  87                         text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to <b>permanently</b> delete file '" + files.get(0).getName() + "'?</td></tr></table>");\r
  88                 else\r
  89                         text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to <b>permanently</b> delete the selected files?</td></tr></table>");\r
  90                 text.setStyleName("pithos-warnMessage");\r
  91                 outer.add(text);\r
  92 \r
  93                 // Create the 'Delete' button, along with a listener that hides the dialog\r
  94                 // when the button is clicked and deletes the file.\r
  95                 Button ok = new Button("Delete", new ClickHandler() {\r
  96                         @Override\r
  97                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {\r
  98                                 deleteFiles();\r
  99                                 hide();\r
 100                         }\r
 101                 });\r
 102                 ok.getElement().setId("confirmation.ok");\r
 103                 buttons.add(ok);\r
 104                 buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);\r
 105                 // Create the 'Cancel' button, along with a listener that hides the\r
 106                 // dialog when the button is clicked.\r
 107                 Button cancel = new Button("Cancel", new ClickHandler() {\r
 108                         @Override\r
 109                         public void onClick(@SuppressWarnings("unused") ClickEvent event) {\r
 110                                 hide();\r
 111                         }\r
 112                 });\r
 113                 cancel.getElement().setId("confirmation.cancel");\r
 114                 buttons.add(cancel);\r
 115                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);\r
 116                 buttons.setSpacing(8);\r
 117                 buttons.setStyleName("pithos-warnMessage");\r
 118                 outer.setStyleName("pithos-warnMessage");\r
 119                 outer.add(buttons);\r
 120                 outer.setCellHorizontalAlignment(text, HasHorizontalAlignment.ALIGN_CENTER);\r
 121                 outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);\r
 122                 setWidget(outer);\r
 123         }\r
 124 \r
 125         /**\r
 126          * Generate an RPC request to delete a file.\r
 127          */\r
 128         protected void deleteFiles() {\r
 129         Iterator<File> iter = files.iterator();\r
 130         deleteFile(iter);\r
 131     }\r
 132 \r
 133         protected void deleteFile(final Iterator<File> iter) {\r
 134         if (iter.hasNext()) {\r
 135             File f = iter.next();\r
 136             String path = f.getUri();\r
 137             DeleteRequest deleteFile = new DeleteRequest(app.getApiPath(), f.getOwner(), path) {\r
 138                 @Override\r
 139                 public void onSuccess(@SuppressWarnings("unused") Resource result) {\r
 140                     deleteFile(iter);\r
 141                 }\r
 142 \r
 143                 @Override\r
 144                 public void onError(Throwable t) {\r
 145                     GWT.log("", t);\r
 146                     if (t instanceof RestException) {\r
 147                         app.displayError("Unable to delete file: " + ((RestException) t).getHttpStatusText());\r
 148                     }\r
 149                     else\r
 150                         app.displayError("System error unable to delete file: "+t.getMessage());\r
 151                 }\r
 152             };\r
 153             deleteFile.setHeader("X-Auth-Token", app.getToken());\r
 154             Scheduler.get().scheduleDeferred(deleteFile);\r
 155         }\r
 156         else {\r
 157             app.updateFolder(files.get(0).getParent(), true, null);\r
 158         }\r
 159     }\r
 160 \r
 161         @Override\r
 162         protected void onPreviewNativeEvent(NativePreviewEvent preview) {\r
 163                 super.onPreviewNativeEvent(preview);\r
 164 \r
 165                 NativeEvent evt = preview.getNativeEvent();\r
 166                 if (evt.getType().equals("keydown"))\r
 167                         // Use the popup's key preview hooks to close the dialog when either\r
 168                         // enter or escape is pressed.\r
 169                         switch (evt.getKeyCode()) {\r
 170                                 case KeyCodes.KEY_ENTER:\r
 171                                         hide();\r
 172                                         deleteFiles();\r
 173                                         break;\r
 174                                 case KeyCodes.KEY_ESCAPE:\r
 175                                         hide();\r
 176                                         break;\r
 177                         }\r
 178         }\r
 179 \r
 180 \r
 181 \r
 182 }\r