ChangeScreen: Hide assignee link on edit

When editing the assignee an input box was shown below the current
assignee. This gave the impression like another assignee is added
(similar to how more reviewers can be added), but not that the current
assignee is edited. Instead hide the assignee link when the assignee
is edited and populate the input box with the current assignee. This
is similar to how editing the topic works. The text with current
assignee in the input box is selected so that it can be easily erased
by typing a new assignee.

Change-Id: I3d2533c018ddd4018199e68c0b7e5c3205f35856
Signed-off-by: Edwin Kempin <ekempin@google.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.java

@@ -14,6 +14,7 @@
 
 package com.google.gerrit.client.change;
 
+import com.google.gerrit.client.FormatUtil;
 import com.google.gerrit.client.NotSignedInDialog;
 import com.google.gerrit.client.changes.ChangeApi;
 import com.google.gerrit.client.changes.Util;
@@ -50,20 +51,18 @@ public class Assignee extends Composite {
 
   private static final Binder uiBinder = GWT.create(Binder.class);
 
-  @UiField
+  @UiField Element show;
-  InlineHyperlink assigneeLink;
+  @UiField InlineHyperlink assigneeLink;
-  @UiField
+  @UiField Image editAssigneeIcon;
-  Image editAssigneeIcon;
+  @UiField Element form;
-  @UiField
+  @UiField Element error;
-  Element form;
-  @UiField
-  Element error;
   @UiField(provided = true)
   RemoteSuggestBox suggestBox;
 
   private AssigneeSuggestOracle assigneeSuggestOracle;
   private Change.Id changeId;
   private boolean canEdit;
+  private AccountInfo currentAssignee;
 
   Assignee() {
     assigneeSuggestOracle = new AssigneeSuggestOracle();
@@ -98,18 +97,24 @@ public class Assignee extends Composite {
     setAssignee(info.assignee());
     assigneeSuggestOracle.setChange(changeId);
     editAssigneeIcon.setVisible(canEdit);
+    if (!canEdit) {
+      show.setTitle(null);
+    }
   }
 
   void onOpenForm() {
     UIObject.setVisible(form, true);
+    UIObject.setVisible(show, false);
     UIObject.setVisible(error, false);
     editAssigneeIcon.setVisible(false);
     suggestBox.setFocus(true);
-    suggestBox.setText("");
+    suggestBox.setText(FormatUtil.nameEmail(currentAssignee));
+    suggestBox.selectAll();
   }
 
   void onCloseForm() {
     UIObject.setVisible(form, false);
+    UIObject.setVisible(show, true);
     UIObject.setVisible(error, false);
     editAssigneeIcon.setVisible(true);
     suggestBox.setFocus(false);
@@ -174,6 +179,7 @@ public class Assignee extends Composite {
   }
 
   private void setAssignee(AccountInfo assignee) {
+    currentAssignee = assignee;
     assigneeLink.setText(assignee != null ? assignee.name() : null);
     assigneeLink.setTargetHistoryToken(assignee != null
         ? PageLinks.toAssigneeQuery(assignee.name() != null

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.ui.xml

@@ -38,7 +38,7 @@ limitations under the License.
     }
   </ui:style>
   <g:HTMLPanel>
-    <div>
+    <div ui:field='show'>
       <u:InlineHyperlink ui:field='assigneeLink'
           title='Search for changes assigned to this user'/>
       <g:Image ui:field='editAssigneeIcon'

gerrit-gwtui/src/main/java/com/google/gerrit/client/ui/RemoteSuggestBox.java

@@ -134,4 +134,8 @@ public class RemoteSuggestBox extends Composite implements Focusable, HasText,
   public HandlerRegistration addCloseHandler(CloseHandler<RemoteSuggestBox> h) {
     return addHandler(h, CloseEvent.getType());
   }
+
+  public void selectAll() {
+    suggestBox.getValueBox().selectAll();
+  }
 }