code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/tagtree/TagTreeViewModel.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
  36 package gr.grnet.pithos.web.client.tagtree;
  37
  38 import gr.grnet.pithos.web.client.Pithos;
  39 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  40 import gr.grnet.pithos.web.client.foldertree.File;
  41 import gr.grnet.pithos.web.client.foldertree.Folder;
  42 import gr.grnet.pithos.web.client.rest.GetRequest;
  43 import gr.grnet.pithos.web.client.rest.RestException;
  44 import gr.grnet.pithos.web.client.tagtree.TagTreeView.Templates;
  45
  46 import java.util.Iterator;
  47 import java.util.LinkedHashSet;
  48 import java.util.List;
  49 import java.util.Set;
  50
  51 import com.google.gwt.cell.client.AbstractCell;
  52 import com.google.gwt.cell.client.Cell;
  53 import com.google.gwt.cell.client.TextCell;
  54 import com.google.gwt.core.client.GWT;
  55 import com.google.gwt.core.client.Scheduler;
  56 import com.google.gwt.event.dom.client.ContextMenuEvent;
  57 import com.google.gwt.safehtml.shared.SafeHtml;
  58 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  59 import com.google.gwt.text.shared.SafeHtmlRenderer;
  60 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  61 import com.google.gwt.view.client.ListDataProvider;
  62 import com.google.gwt.view.client.SingleSelectionModel;
  63 import com.google.gwt.view.client.TreeViewModel;
  64
  65 public class TagTreeViewModel implements TreeViewModel {
  66
  67     private Cell<Tag> tagCell = new AbstractCell<Tag>(ContextMenuEvent.getType().getName()) {
  68
  69        @Override
  70         public void render(@SuppressWarnings("unused") Context context, Tag tag, SafeHtmlBuilder safeHtmlBuilder) {
  71             String html = AbstractImagePrototype.create(TagTreeView.images.tag()).getHTML();
  72             safeHtmlBuilder.appendHtmlConstant(html);
  73             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(tag.getName()));
  74         }
  75
  76         @Override
  77         public void onBrowserEvent(@SuppressWarnings("unused") Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, Tag tag, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<Tag> valueUpdater) {
  78             if (event.getType().equals(com.google.gwt.event.dom.client.ContextMenuEvent.getType().getName())) {
  79                 TagTreeViewModel.this.selectionModel.setSelected(tag, true);
  80             }
  81         }
  82     };
  83
  84     private ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
  85     private ListDataProvider<Tag> tagDataProvider = new ListDataProvider<Tag>();
  86
  87     protected SingleSelectionModel<Tag> selectionModel;
  88
  89     protected Pithos app;
  90
  91     public TagTreeViewModel(Pithos _app, SingleSelectionModel<Tag> selectionModel) {
  92         app = _app;
  93         this.selectionModel = selectionModel;
  94     }
  95
  96     @Override
  97     public <T> NodeInfo<?> getNodeInfo(T value) {
  98         if (value == null) {
  99             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 100                 @Override
 101                 public SafeHtml render(String object) {
 102                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 103                     render(object, builder);
 104                     return builder.toSafeHtml();
 105                 }
 106
 107                 @Override
 108                 public void render(String object, SafeHtmlBuilder builder) {
 109                     String html = AbstractImagePrototype.create(TagTreeView.images.tag()).getHTML();
 110                     builder.appendHtmlConstant(html);
 111                     builder.append(Templates.INSTANCE.nameSpan(object));
 112                 }
 113             }), null, null);
 114         }
 115         else if (value instanceof String) {
 116             //fetchAllTags();
 117             return new DefaultNodeInfo<Tag>(tagDataProvider, tagCell, selectionModel, null);
 118         }
 119         else
 120             return null;
 121     }
 122
 123     @Override
 124     public boolean isLeaf(Object o) {
 125         if (o == null)
 126             return false;
 127         if (o instanceof String)
 128             return tagDataProvider.getList().isEmpty();
 129                 return true;
 130     }
 131
 132     public Tag getSelection() {
 133         return selectionModel.getSelectedObject();
 134     }
 135
 136     public void updateTag(Tag tag) {
 137         fetchTag(tag);
 138     }
 139
 140     public void fetchTag(Tag t) {
 141         AccountResource account = app.getAccount();
 142         Iterator<Folder> iter = account.getContainers().iterator();
 143         fetchTag(iter, t, new LinkedHashSet<File>());
 144     }
 145
 146     protected void fetchTag(final Iterator<Folder> iter, final Tag t, final Set<File> files) {
 147         if (iter.hasNext()) {
 148             Folder f = iter.next();
 149             String path = f.getUri() + "?format=json&meta=" + t.getName();
 150             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path) {
 151                 @Override
 152                 public void onSuccess(Folder _result) {
 153                     files.addAll(_result.getFiles());
 154                     fetchTag(iter, t, files);
 155                 }
 156
 157                 @Override
 158                 public void onError(Throwable th) {
 159                     GWT.log("Error getting folder", th);
 160                     if (th instanceof RestException)
 161                         app.displayError("Error getting folder: " + ((RestException) th).getHttpStatusText());
 162                     else
 163                         app.displayError("System error fetching folder: " + th.getMessage());
 164                 }
 165             };
 166             getFolder.setHeader("X-Auth-Token", app.getToken());
 167             Scheduler.get().scheduleDeferred(getFolder);
 168         }
 169         else {
 170             app.showFiles(files);
 171         }
 172     }
 173
 174     public void initialize(List<Tag> allTags) {
 175         tagDataProvider.getList().addAll(allTags);
 176         rootDataProvider.getList().add("Tags");
 177     }
 178 }