1 files changed, 139 insertions, 0 deletions
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/StarCache.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/StarCache.java
new file mode 100644
index 0000000000..d7624a6fd8
--- /dev/null
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/StarCache.java
@@ -0,0 +1,139 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.client.changes;
+
+import com.google.gerrit.client.Gerrit;
+import com.google.gerrit.client.rpc.GerritCallback;
+import com.google.gerrit.client.ui.NeedsSignInKeyCommand;
+import com.google.gerrit.common.data.ChangeDetail;
+import com.google.gerrit.common.data.ChangeInfo;
+import com.google.gerrit.common.data.ToggleStarRequest;
+import com.google.gerrit.reviewdb.client.Change;
+
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.event.dom.client.ClickHandler;
+import com.google.gwt.event.dom.client.KeyPressEvent;
+import com.google.gwt.event.logical.shared.HasValueChangeHandlers;
+import com.google.gwt.event.logical.shared.ValueChangeEvent;
+import com.google.gwt.event.logical.shared.ValueChangeHandler;
+import com.google.gwt.event.shared.GwtEvent;
+import com.google.gwt.event.shared.HandlerManager;
+import com.google.gwt.event.shared.HandlerRegistration;
+import com.google.gwt.resources.client.ImageResource;
+import com.google.gwt.user.client.ui.Image;
+import com.google.gwtjsonrpc.common.VoidResult;
+
+public class StarCache implements HasValueChangeHandlers<Boolean> {
+  public class KeyCommand extends NeedsSignInKeyCommand {
+    public KeyCommand(int mask, char key, String help) {
+      super(mask, key, help);
+    }
+
+    @Override
+    public void onKeyPress(final KeyPressEvent event) {
+      StarCache.this.toggleStar();
+    }
+  }
+
+  ChangeCache cache;
+
+  private HandlerManager manager = new HandlerManager(this);
+
+  public StarCache(final Change.Id chg) {
+    cache = ChangeCache.get(chg);
+  }
+
+  public boolean get() {
+    ChangeDetail detail = cache.getChangeDetailCache().get();
+    if (detail != null) {
+      return detail.isStarred();
+    }
+    ChangeInfo info = cache.getChangeInfoCache().get();
+    if (info != null) {
+      return info.isStarred();
+    }
+    return false;
+  }
+
+  public void set(final boolean s) {
+    if (Gerrit.isSignedIn() && s != get()) {
+      final ToggleStarRequest req = new ToggleStarRequest();
+      req.toggle(cache.getChangeId(), s);
+
+      Util.LIST_SVC.toggleStars(req, new GerritCallback<VoidResult>() {
+        public void onSuccess(final VoidResult result) {
+          setStarred(s);
+          fireEvent(new ValueChangeEvent<Boolean>(s){});
+        }
+      });
+    }
+  }
+
+  private void setStarred(final boolean s) {
+    ChangeDetail detail = cache.getChangeDetailCache().get();
+    if (detail != null) {
+      detail.setStarred(s);
+    }
+    ChangeInfo info = cache.getChangeInfoCache().get();
+    if (info != null) {
+      info.setStarred(s);
+    }
+  }
+
+  public void toggleStar() {
+    set(!get());
+  }
+
+  @SuppressWarnings("unchecked")
+  public Image createStar() {
+    final Image star = new Image(getResource());
+    star.setVisible(Gerrit.isSignedIn());
+
+    star.addClickHandler(new ClickHandler() {
+      @Override
+      public void onClick(final ClickEvent event) {
+        StarCache.this.toggleStar();
+      }
+    });
+
+    @SuppressWarnings("rawtypes")
+    ValueChangeHandler starUpdater = new ValueChangeHandler() {
+        @Override
+        public void onValueChange(ValueChangeEvent event) {
+          star.setResource(StarCache.this.getResource());
+        }
+      };
+
+    cache.getChangeDetailCache().addValueChangeHandler(starUpdater);
+    cache.getChangeInfoCache().addValueChangeHandler(starUpdater);
+
+    this.addValueChangeHandler(starUpdater);
+
+    return star;
+  }
+
+  private ImageResource getResource() {
+    return get() ? Gerrit.RESOURCES.starFilled() : Gerrit.RESOURCES.starOpen();
+  }
+
+  public void fireEvent(GwtEvent<?> event) {
+    manager.fireEvent(event);
+  }
+
+  public HandlerRegistration addValueChangeHandler(
+      ValueChangeHandler<Boolean> handler) {
+    return manager.addHandler(ValueChangeEvent.getType(), handler);
+  }
+}