Configuration option change.showAssignee

Allows hiding of all assignee UI elements from users,
effectively disabling assignee workflow.

Change-Id: I29fecebcec6a09ab32ebc7f5ea78c1f739f3379a

Documentation/config-gerrit.txt

@@ -980,6 +980,13 @@ performance improvements by reducing the number of refs in the repo.
 +
 Default is true.
 
+[[change.showAssignee]]change.showAssignee::
++
+Allow assignee workflow. If set to false, assignees will not be visible anywhere
+in UI.
++
+Default is true.
+
 [[change.submitLabel]]change.submitLabel::
 +
 Label name for the submit button.

gerrit-extension-api/src/main/java/com/google/gerrit/extensions/common/ChangeConfigInfo.java

@@ -16,6 +16,7 @@ package com.google.gerrit.extensions.common;
 
 public class ChangeConfigInfo {
   public Boolean allowBlame;
+  public Boolean showAssignee;
   public Boolean allowDrafts;
   public int largeChange;
   public String replyLabel;

gerrit-gwtui-common/src/main/java/com/google/gerrit/client/info/ServerInfo.java

@@ -59,6 +59,7 @@ public class ServerInfo extends JavaScriptObject {
     public final native int largeChange() /*-{ return this.large_change || 0; }-*/;
     public final native String replyLabel() /*-{ return this.reply_label; }-*/;
     public final native String replyTooltip() /*-{ return this.reply_tooltip; }-*/;
+    public final native boolean showAssignee() /*-{ return this.show_assignee || false; }-*/;
     public final native int updateDelay() /*-{ return this.update_delay || 0; }-*/;
     public final native boolean isSubmitWholeTopicEnabled() /*-{
         return this.submit_whole_topic; }-*/;

gerrit-gwtui/src/main/java/com/google/gerrit/client/SearchSuggestOracle.java

@@ -120,8 +120,6 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
     suggestions.add("is:merged");
     suggestions.add("is:abandoned");
     suggestions.add("is:mergeable");
-    suggestions.add("is:assigned");
-    suggestions.add("is:unassigned");
 
     suggestions.add("status:");
     suggestions.add("status:open");
@@ -141,7 +139,11 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
       suggestions.add("hashtag:");
     }
 
-    suggestions.add("assignee:");
+    if (Gerrit.info().change().showAssignee()) {
+      suggestions.add("is:assigned");
+      suggestions.add("is:unassigned");
+      suggestions.add("assignee:");
+    }
 
     suggestions.add("AND");
     suggestions.add("OR");

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

@@ -171,6 +171,7 @@ public class ChangeScreen extends Screen {
   @UiField Anchor permalink;
 
   @UiField Assignee assignee;
+  @UiField Element assigneeRow;
   @UiField Element ccText;
   @UiField Reviewers reviewers;
   @UiField Hashtags hashtags;
@@ -1294,8 +1295,12 @@ public class ChangeScreen extends Screen {
     topic.set(info, revision);
     commit.set(commentLinkProcessor, info, revision);
     related.set(info, revision);
-    assignee.set(info);
     reviewers.set(info);
+    if (Gerrit.info().change().showAssignee()) {
+      assignee.set(info);
+    } else {
+      setVisible(assigneeRow, false);
+    }
     if (Gerrit.isNoteDbEnabled()) {
       hashtags.set(info, revision);
     } else {

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

@@ -463,7 +463,7 @@ limitations under the License.
                 </g:FlowPanel>
               </td>
             </tr>
-            <tr>
+            <tr ui:field='assigneeRow'>
               <th><ui:msg>Assignee</ui:msg></th>
               <td>
                 <c:Assignee ui:field='assignee'/>

gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeTable.java

@@ -73,6 +73,7 @@ public class ChangeTable extends NavigationTable<ChangeInfo> {
 
   private final List<Section> sections;
   private int columns;
+  private final boolean showAssignee;
   private final boolean showLegacyId;
   private List<String> labelNames;
 
@@ -80,6 +81,7 @@ public class ChangeTable extends NavigationTable<ChangeInfo> {
     super(Util.C.changeItemHelp());
     columns = BASE_COLUMNS;
     labelNames = Collections.emptyList();
+    showAssignee = Gerrit.info().change().showAssignee();
     showLegacyId = Gerrit.getUserPreferences().legacycidInChangeTable();
 
     if (Gerrit.isSignedIn()) {
@@ -106,6 +108,9 @@ public class ChangeTable extends NavigationTable<ChangeInfo> {
     if (!showLegacyId) {
       fmt.addStyleName(0, C_ID, Gerrit.RESOURCES.css().dataHeaderHidden());
     }
+    if (!showAssignee) {
+      fmt.addStyleName(0, C_ASSIGNEE, Gerrit.RESOURCES.css().dataHeaderHidden());
+    }
 
     table.addClickHandler(new ClickHandler() {
       @Override
@@ -166,7 +171,9 @@ public class ChangeTable extends NavigationTable<ChangeInfo> {
     fmt.addStyleName(row, C_SUBJECT, Gerrit.RESOURCES.css().cSUBJECT());
     fmt.addStyleName(row, C_STATUS, Gerrit.RESOURCES.css().cSTATUS());
     fmt.addStyleName(row, C_OWNER, Gerrit.RESOURCES.css().cOWNER());
-    fmt.addStyleName(row, C_ASSIGNEE, Gerrit.RESOURCES.css().cASSIGNEE());
+    fmt.addStyleName(row, C_ASSIGNEE,
+        showAssignee ? Gerrit.RESOURCES.css().cASSIGNEE()
+            : Gerrit.RESOURCES.css().dataCellHidden());
     fmt.addStyleName(row, C_LAST_UPDATE, Gerrit.RESOURCES.css().cLastUpdate());
     fmt.addStyleName(row, C_SIZE, Gerrit.RESOURCES.css().cSIZE());
 
@@ -242,16 +249,18 @@ public class ChangeTable extends NavigationTable<ChangeInfo> {
       table.setText(row, C_OWNER, "");
     }
 
-    if (c.assignee() != null) {
+    if (showAssignee) {
-      table.setWidget(row, C_ASSIGNEE,
+      if (c.assignee() != null) {
-          AccountLinkPanel.forAssignee(c.assignee()));
+        table.setWidget(row, C_ASSIGNEE,
-      if (Objects.equals(c.assignee().getId(),
+            AccountLinkPanel.forAssignee(c.assignee()));
-          Gerrit.getUserAccount().getId())) {
+        if (Objects.equals(c.assignee().getId(),
-        table.getRowFormatter().addStyleName(row,
+            Gerrit.getUserAccount().getId())) {
-            Gerrit.RESOURCES.css().cASSIGNEDTOME());
+          table.getRowFormatter().addStyleName(row,
+              Gerrit.RESOURCES.css().cASSIGNEDTOME());
+        }
+      } else {
+        table.setText(row, C_ASSIGNEE, "");
       }
-    } else {
-      table.setText(row, C_ASSIGNEE, "");
     }
 
     table.setWidget(row, C_PROJECT, new ProjectLink(c.projectNameKey()));

gerrit-server/src/main/java/com/google/gerrit/server/config/GetServerInfo.java

@@ -203,6 +203,9 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
     ChangeConfigInfo info = new ChangeConfigInfo();
     info.allowBlame = toBoolean(cfg.getBoolean("change", "allowBlame", true));
     info.allowDrafts = toBoolean(cfg.getBoolean("change", "allowDrafts", true));
+    info.showAssignee =
+        toBoolean(cfg.getBoolean("change", "showAssignee", true)
+            && isNoteDbEnabled());
     info.largeChange = cfg.getInt("change", "largeChange", 500);
     info.replyTooltip =
         Optional.fromNullable(cfg.getString("change", null, "replyTooltip"))