ChangeScreen2: linkify branch and project name

Bug: issue 2075
Change-Id: I6ddef6f1417b53e6a1e2b795ac9b67309d39abb6

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.java

@@ -39,15 +39,18 @@ import com.google.gerrit.client.rpc.NativeString;
 import com.google.gerrit.client.rpc.Natives;
 import com.google.gerrit.client.rpc.RestApi;
 import com.google.gerrit.client.rpc.ScreenLoadCallback;
+import com.google.gerrit.client.ui.BranchLink;
 import com.google.gerrit.client.ui.ChangeLink;
 import com.google.gerrit.client.ui.CommentLinkProcessor;
+import com.google.gerrit.client.ui.InlineHyperlink;
 import com.google.gerrit.client.ui.Screen;
 import com.google.gerrit.client.ui.UserActivityMonitor;
+import com.google.gerrit.common.PageLinks;
 import com.google.gerrit.common.changes.ListChangesOption;
 import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.Change.Status;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gerrit.reviewdb.client.Change.Status;
 import com.google.gerrit.reviewdb.client.Project.SubmitType;
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.JsArray;
@@ -135,8 +138,8 @@ public class ChangeScreen2 extends Screen {
   @UiField Element changeIdText;
   @UiField Element ownerText;
   @UiField Element statusText;
-  @UiField Element projectText;
-  @UiField Element branchText;
+  @UiField InlineHyperlink projectLink;
+  @UiField InlineHyperlink branchLink;
   @UiField Element submitActionText;
   @UiField Element notMergeable;
   @UiField CopyableLabel idText;
@@ -291,6 +294,26 @@ public class ChangeScreen2 extends Screen {
         style, headerLine, download);
   }
 
+  private void initProjectLink(ChangeInfo info) {
+    projectLink.setText(info.project());
+    projectLink.setTargetHistoryToken(
+        PageLinks.toChangeQuery(
+            PageLinks.projectQuery(
+                info.project_name_key(),
+                info.status())));
+  }
+
+  private void initBranchLink(ChangeInfo info) {
+    branchLink.setText(info.branch());
+    branchLink.setTargetHistoryToken(
+        PageLinks.toChangeQuery(
+            BranchLink.query(
+                info.project_name_key(),
+                info.status(),
+                info.branch(),
+                info.topic())));
+  }
+
   private void initEditMessageAction(ChangeInfo info, String revision) {
     NativeMap<ActionInfo> actions = info.revision(revision).actions();
     if (actions != null && actions.containsKey("message")) {
@@ -636,13 +659,13 @@ public class ChangeScreen2 extends Screen {
     initIncludedInAction(info);
     initRevisionsAction(info, revision);
     initDownloadAction(info, revision);
+    initProjectLink(info);
+    initBranchLink(info);
     actions.display(info, revision);
 
     star.setValue(info.starred());
     permalink.setHref(ChangeLink.permalink(changeId));
     changeIdText.setInnerText(String.valueOf(info.legacy_id()));
-    projectText.setInnerText(info.project());
-    branchText.setInnerText(info.branch());
     idText.setText("Change-Id: " + info.change_id());
     idText.setPreviewText(info.change_id());
     reload.set(info);

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.ui.xml

@@ -18,6 +18,7 @@ limitations under the License.
     xmlns:ui='urn:ui:com.google.gwt.uibinder'
     xmlns:c='urn:import:com.google.gerrit.client.change'
     xmlns:g='urn:import:com.google.gwt.user.client.ui'
+    xmlns:x='urn:import:com.google.gerrit.client.ui'
     xmlns:clippy='urn:import:com.google.gwtexpui.clippy.client'>
   <ui:with field='res' type='com.google.gerrit.client.change.Resources'/>
   <ui:style type='com.google.gerrit.client.change.ChangeScreen2.Style'>
@@ -316,11 +317,19 @@ limitations under the License.
             </tr>
             <tr>
               <th><ui:msg>Project</ui:msg></th>
-              <td ui:field='projectText'/>
+              <td><x:InlineHyperlink ui:field='projectLink'
+                     title='Search for changes on this project'>
+                     <ui:attribute name='title'/>
+                  </x:InlineHyperlink>
+              </td>
             </tr>
             <tr>
               <th><ui:msg>Branch</ui:msg></th>
-              <td ui:field='branchText'/>
+              <td><x:InlineHyperlink ui:field='branchLink'
+                     title='Search for changes on this branch'>
+                     <ui:attribute name='title'/>
+                  </x:InlineHyperlink>
+              </td>
             </tr>
             <tr>
               <th><ui:msg>Strategy</ui:msg></th>

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

@@ -57,7 +57,7 @@ public class BranchLink extends InlineHyperlink {
     }
   }
 
-  private static String query(Project.NameKey project, Change.Status status,
+  public static String query(Project.NameKey project, Change.Status status,
       String branch, String topic) {
     String query = PageLinks.projectQuery(project, status);