code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/grouptree/GroupTreeViewModel.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.grouptree;
  37
  38 import gr.grnet.pithos.web.client.Pithos;
  39 import gr.grnet.pithos.web.client.foldertree.File;
  40 import gr.grnet.pithos.web.client.grouptree.GroupTreeView.Templates;
  41
  42 import java.util.HashMap;
  43 import java.util.HashSet;
  44 import java.util.Map;
  45 import java.util.Set;
  46
  47 import com.google.gwt.cell.client.AbstractCell;
  48 import com.google.gwt.cell.client.Cell;
  49 import com.google.gwt.event.dom.client.ContextMenuEvent;
  50 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  51 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  52 import com.google.gwt.view.client.ListDataProvider;
  53 import com.google.gwt.view.client.SelectionChangeEvent;
  54 import com.google.gwt.view.client.SingleSelectionModel;
  55 import com.google.gwt.view.client.TreeViewModel;
  56
  57 public class GroupTreeViewModel implements TreeViewModel {
  58
  59     protected Pithos app;
  60
  61     private ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
  62
  63     private Cell<String> rootCell = new AbstractCell<String>(ContextMenuEvent.getType().getName()) {
  64
  65                 @Override
  66                 public void render(@SuppressWarnings("unused") Context context, String value, SafeHtmlBuilder sb) {
  67             String html = AbstractImagePrototype.create(GroupTreeView.images.groups()).getHTML();
  68             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  69             sb.append(Templates.INSTANCE.nameSpan(value));
  70                 }
  71
  72         @Override
  73         public void onBrowserEvent(@SuppressWarnings("unused") Cell.Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, String s, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<String> valueUpdater) {
  74             GroupTreeViewModel.this.rootSelectionModel.setSelected(s, true);
  75             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  76                 GroupContextMenu menu = new GroupContextMenu(app, GroupTreeView.images, null);
  77                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  78                 menu.show();
  79             }
  80         }
  81         };
  82
  83         private Cell<Group> groupCell = new AbstractCell<Group>(ContextMenuEvent.getType().getName()) {
  84
  85                 @Override
  86                 public void render(@SuppressWarnings("unused") Context context, Group value, SafeHtmlBuilder sb) {
  87             String html = AbstractImagePrototype.create(GroupTreeView.images.group()).getHTML();
  88             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  89             sb.append(Templates.INSTANCE.nameSpan(value.getName()));
  90                 }
  91
  92         @Override
  93         public void onBrowserEvent(@SuppressWarnings("unused") Cell.Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, Group group, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<Group> valueUpdater) {
  94             GroupTreeViewModel.this.groupSelectionModel.setSelected(group, true);
  95             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  96                 GroupContextMenu menu = new GroupContextMenu(app, GroupTreeView.images, group);
  97                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  98                 menu.show();
  99             }
 100         }
 101         };
 102
 103     private Cell<User> userCell = new AbstractCell<User>(ContextMenuEvent.getType().getName()) {
 104
 105                 @Override
 106                 public void render(@SuppressWarnings("unused") Context context, User value, SafeHtmlBuilder sb) {
 107             String html = AbstractImagePrototype.create(GroupTreeView.images.user()).getHTML();
 108             sb.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 109             sb.append(Templates.INSTANCE.nameSpan(value.getName()));
 110                 }
 111
 112         @Override
 113         public void onBrowserEvent(@SuppressWarnings("unused") Cell.Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, User user, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<User> valueUpdater) {
 114             GroupTreeViewModel.this.userSelectionModel.setSelected(user, true);
 115             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
 116                 UserContextMenu menu = new UserContextMenu(app, GroupTreeView.images, user);
 117                 menu.setPopupPosition(event.getClientX(), event.getClientY());
 118                 menu.show();
 119             }
 120         }
 121     };
 122
 123     protected ListDataProvider<Group> groupsDataProvider = new ListDataProvider<Group>();
 124
 125     protected Map<Group, ListDataProvider<User>> userDataProviderMap = new HashMap<Group, ListDataProvider<User>>();
 126
 127     protected Map<String, Set<File>> sharedFiles = new HashMap<String, Set<File>>();
 128
 129     SingleSelectionModel<String> rootSelectionModel;
 130     SingleSelectionModel<Group> groupSelectionModel;
 131     SingleSelectionModel<User> userSelectionModel;
 132
 133     public GroupTreeViewModel(Pithos _app) {
 134         app = _app;
 135         rootSelectionModel = new SingleSelectionModel<String>();
 136         app.addSelectionModel(rootSelectionModel);
 137         rootSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 138
 139                         @Override
 140                         public void onSelectionChange(SelectionChangeEvent event) {
 141                                 if (rootSelectionModel.getSelectedObject() != null) {
 142                                         app.deselectOthers(app.getGroupTreeView(), rootSelectionModel);
 143                                         app.showFiles(new HashSet<File>());
 144                                 }
 145                         }
 146                 });
 147
 148         groupSelectionModel = new SingleSelectionModel<Group>();
 149         app.addSelectionModel(groupSelectionModel);
 150         groupSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 151
 152                         @Override
 153                         public void onSelectionChange(SelectionChangeEvent event) {
 154                                 if (groupSelectionModel.getSelectedObject() != null) {
 155                                         app.deselectOthers(app.getGroupTreeView(), groupSelectionModel);
 156                                         app.showFiles(new HashSet<File>());
 157                                 }
 158                         }
 159                 });
 160
 161         userSelectionModel = new SingleSelectionModel<User>();
 162         app.addSelectionModel(userSelectionModel);
 163         userSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 164
 165                         @Override
 166                         public void onSelectionChange(SelectionChangeEvent event) {
 167                                 if (userSelectionModel.getSelectedObject() != null) {
 168                                         app.deselectOthers(app.getGroupTreeView(), userSelectionModel);
 169                                         app.showFiles(new HashSet<File>());
 170                                 }
 171                         }
 172                 });
 173 }
 174
 175     @Override
 176     public <T> NodeInfo<?> getNodeInfo(T value) {
 177         if (value == null) {
 178                 rootDataProvider.getList().add("");
 179             return new DefaultNodeInfo<String>(rootDataProvider, rootCell,  rootSelectionModel, null);
 180         }
 181         else if (value instanceof String) {
 182                 groupsDataProvider.getList().clear();
 183                 groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 184             return new DefaultNodeInfo<Group>(groupsDataProvider, groupCell, groupSelectionModel, null);
 185         }
 186         else { //Group
 187                 Group g = (Group) value;
 188                         if (userDataProviderMap.get(g) == null) {
 189                                 userDataProviderMap.put(g, new ListDataProvider<User>());
 190                         }
 191                         final ListDataProvider<User> dataProvider = userDataProviderMap.get(g);
 192                         dataProvider.getList().clear();
 193                         for (String u : g.getMembers())
 194                                 dataProvider.getList().add(new User(u, g));
 195                 return new DefaultNodeInfo<User>(dataProvider, userCell, userSelectionModel, null);
 196         }
 197     }
 198
 199         @Override
 200     public boolean isLeaf(Object o) {
 201         if (o instanceof String) {
 202                 return ((String) o).length() == 0 || app.getAccount().getGroups().isEmpty();
 203         }
 204         else if (o instanceof Group)
 205                 return ((Group) o).getMembers().isEmpty();
 206         else if (o != null)
 207                 return true;
 208         return false;
 209     }
 210
 211         public void initialize() {
 212         rootDataProvider.getList().clear();
 213         rootDataProvider.getList().add("Groups");
 214         }
 215
 216         public void updateGroupNode(Group group) {
 217                 if (group == null) {
 218                         groupsDataProvider.getList().clear();
 219                         groupsDataProvider.getList().addAll(app.getAccount().getGroups());
 220                 }
 221                 else {
 222                         if (userDataProviderMap.get(group) == null) {
 223                                 userDataProviderMap.put(group, new ListDataProvider<User>());
 224                         }
 225                         final ListDataProvider<User> dataProvider = userDataProviderMap.get(group);
 226                         dataProvider.getList().clear();
 227                         for (String u : group.getMembers())
 228                                 dataProvider.getList().add(new User(u, group));
 229                 }
 230         }
 231
 232         public Object getSelectedObject() {
 233                 if (rootSelectionModel.getSelectedObject() != null)
 234                         return rootSelectionModel.getSelectedObject();
 235                 if (groupSelectionModel.getSelectedObject() != null)
 236                         return groupSelectionModel.getSelectedObject();
 237                 if (userSelectionModel.getSelectedObject() != null)
 238                         return userSelectionModel.getSelectedObject();
 239                 return null;
 240         }
 241 }