ChangeScreen2: allow edit commit message

Add new "Edit Message" button in change header and bind it to "e"
shortcut.  Add a new UiAction as REST API endpoint to create a new
revision with updated commit message.  Reload the screen on success.

Change-Id: Ic555f16efba4783eca9684340b27f9d58b1482bb

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

@@ -35,7 +35,7 @@ import java.util.TreeSet;
 class Actions extends Composite {
   private static final String[] CORE = {
     "abandon", "restore", "revert", "topic",
-    "cherrypick", "submit", "rebase"};
+    "cherrypick", "submit", "rebase", "message"};
 
   interface Binder extends UiBinder<FlowPanel, Actions> {}
   private static Binder uiBinder = GWT.create(Binder.class);

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

@@ -19,6 +19,7 @@ import com.google.gerrit.client.Gerrit;
 import com.google.gerrit.client.account.AccountInfo;
 import com.google.gerrit.client.changes.ChangeApi;
 import com.google.gerrit.client.changes.ChangeInfo;
+import com.google.gerrit.client.changes.ChangeInfo.ActionInfo;
 import com.google.gerrit.client.changes.ChangeInfo.ApprovalInfo;
 import com.google.gerrit.client.changes.ChangeInfo.CommitInfo;
 import com.google.gerrit.client.changes.ChangeInfo.LabelInfo;
@@ -148,8 +149,10 @@ public class ChangeScreen2 extends Screen {
   @UiField Button reply;
   @UiField Button expandAll;
   @UiField Button collapseAll;
+  @UiField Button editMessage;
   @UiField QuickApprove quickApprove;
   private ReplyAction replyAction;
+  private EditMessageAction editMessageAction;
 
   public ChangeScreen2(Change.Id changeId, String revision, boolean openReplyBox) {
     this.changeId = changeId;
@@ -241,6 +244,26 @@ public class ChangeScreen2 extends Screen {
     }
   }
 
+  private void initEditMessageAction() {
+    NativeMap<ActionInfo> actions = changeInfo.revision(revision).actions();
+    if (actions != null && actions.containsKey("message")) {
+      editMessage.setVisible(true);
+      editMessageAction = new EditMessageAction(
+          changeInfo.legacy_id(),
+          revision,
+          changeInfo.revision(revision).commit().message(),
+          style,
+          editMessage,
+          reply);
+      keysAction.add(new KeyCommand(0, 'e', Util.C.keyEditMessage()) {
+        @Override
+        public void onKeyPress(KeyPressEvent event) {
+          editMessageAction.onEdit();
+        }
+      });
+    }
+  }
+
   @Override
   public void registerKeys() {
     super.registerKeys();
@@ -325,6 +348,11 @@ public class ChangeScreen2 extends Screen {
     }
   }
 
+  @UiHandler("editMessage")
+  void onEditMessage(ClickEvent e) {
+    editMessageAction.onEdit();
+  }
+
   @UiHandler("expandAll")
   void onExpandAll(ClickEvent e) {
     int n = history.getWidgetCount();
@@ -566,6 +594,7 @@ public class ChangeScreen2 extends Screen {
     quickApprove.set(info, revision);
 
     if (Gerrit.isSignedIn()) {
+      initEditMessageAction();
       replyAction = new ReplyAction(info, revision, style, reply);
       if (topic.canEdit()) {
         keysAction.add(new KeyCommand(0, 't', Util.C.keyEditTopic()) {

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

@@ -222,6 +222,13 @@ limitations under the License.
             title='Apply score with one click'>
           <ui:attribute name='title'/>
         </c:QuickApprove>
+        <g:Button ui:field='editMessage'
+            styleName=''
+            visible='false'
+            title='Edit commit message (Shortcut: e)'>
+          <ui:attribute name='title'/>
+          <div><ui:msg>Edit Message</ui:msg></div>
+        </g:Button>
       </div>
       <div class='{style.revisionList}' ui:field='revisionParent'>
         <ui:msg>Revision <g:ListBox ui:field='revisionList'/></ui:msg>

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

@@ -0,0 +1,80 @@
+// Copyright (C) 2013 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.change;
+
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gwt.event.logical.shared.CloseEvent;
+import com.google.gwt.event.logical.shared.CloseHandler;
+import com.google.gwt.user.client.ui.PopupPanel;
+import com.google.gwt.user.client.ui.Widget;
+import com.google.gwtexpui.globalkey.client.GlobalKey;
+import com.google.gwtexpui.user.client.PluginSafePopupPanel;
+
+class EditMessageAction {
+  private final Change.Id changeId;
+  private final String revision;
+  private final String originalMessage;
+  private final ChangeScreen2.Style style;
+  private final Widget editMessageButton;
+  private final Widget replyButton;
+
+  private EditMessageBox editBox;
+  private PopupPanel popup;
+
+  EditMessageAction(
+      Change.Id changeId,
+      String revision,
+      String originalMessage,
+      ChangeScreen2.Style style,
+      Widget editButton,
+      Widget replyButton) {
+    this.changeId = changeId;
+    this.revision = revision;
+    this.originalMessage = originalMessage;
+    this.style = style;
+    this.editMessageButton = editButton;
+    this.replyButton = replyButton;
+  }
+
+  void onEdit() {
+    if (popup != null) {
+      popup.hide();
+      return;
+    }
+
+    if (editBox == null) {
+      editBox = new EditMessageBox(
+          changeId,
+          revision,
+          originalMessage);
+    }
+
+    final PluginSafePopupPanel p = new PluginSafePopupPanel(true);
+    p.setStyleName(style.replyBox());
+    p.addAutoHidePartner(editMessageButton.getElement());
+    p.addCloseHandler(new CloseHandler<PopupPanel>() {
+      @Override
+      public void onClose(CloseEvent<PopupPanel> event) {
+        if (popup == p) {
+          popup = null;
+        }
+      }
+    });
+    p.add(editBox);
+    p.showRelativeTo(replyButton);
+    GlobalKey.dialog(p);
+    popup = p;
+  }
+}

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

@@ -0,0 +1,102 @@
+// Copyright (C) 2013 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.change;
+
+import com.google.gerrit.client.Gerrit;
+import com.google.gerrit.client.changes.ChangeApi;
+import com.google.gerrit.client.rpc.GerritCallback;
+import com.google.gerrit.client.ui.TextBoxChangeListener;
+import com.google.gerrit.common.PageLinks;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.JavaScriptObject;
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.core.client.Scheduler.ScheduledCommand;
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.uibinder.client.UiHandler;
+import com.google.gwt.user.client.ui.Button;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.HTMLPanel;
+import com.google.gwt.user.client.ui.PopupPanel;
+import com.google.gwt.user.client.ui.Widget;
+import com.google.gwtexpui.globalkey.client.NpTextArea;
+
+class EditMessageBox extends Composite {
+  interface Binder extends UiBinder<HTMLPanel, EditMessageBox> {}
+  private static final Binder uiBinder = GWT.create(Binder.class);
+
+  private final Change.Id changeId;
+  private final String revision;
+  private String originalMessage;
+
+  @UiField NpTextArea message;
+  @UiField Button save;
+  @UiField Button cancel;
+
+  EditMessageBox(
+      Change.Id changeId,
+      String revision,
+      String msg) {
+    this.changeId = changeId;
+    this.revision = revision;
+    this.originalMessage = msg.trim();
+    initWidget(uiBinder.createAndBindUi(this));
+    new TextBoxChangeListener(message) {
+      public void onTextChanged(String newText) {
+        save.setEnabled(!newText.trim()
+            .equals(originalMessage));
+      }
+    };
+  }
+
+  @Override
+  protected void onLoad() {
+    message.setText(originalMessage);
+    save.setEnabled(false);
+    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
+      @Override
+      public void execute() {
+        message.setFocus(true);
+      }});
+  }
+
+  @UiHandler("save")
+  void onSave(ClickEvent e) {
+    ChangeApi.message(changeId.get(), revision, message.getText().trim(),
+        new GerritCallback<JavaScriptObject>() {
+          @Override
+          public void onSuccess(JavaScriptObject msg) {
+            Gerrit.display(PageLinks.toChange2(changeId));
+            hide();
+          };
+        });
+  }
+
+  @UiHandler("cancel")
+  void onCancel(ClickEvent e) {
+    hide();
+  }
+
+  private void hide() {
+    for (Widget w = getParent(); w != null; w = w.getParent()) {
+      if (w instanceof PopupPanel) {
+        ((PopupPanel) w).hide();
+        break;
+      }
+    }
+  }
+}

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

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2013 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.
+-->
+<ui:UiBinder
+    xmlns:ui='urn:ui:com.google.gwt.uibinder'
+    xmlns:g='urn:import:com.google.gwt.user.client.ui'
+    xmlns:c='urn:import:com.google.gwtexpui.globalkey.client'>
+  <ui:with field='res' type='com.google.gerrit.client.change.Resources'/>
+  <ui:style>
+    .commitMessage {
+      background-color: white;
+      font-family: monospace;
+    }
+    .cancel { float: right; }
+  </ui:style>
+  <g:HTMLPanel>
+    <div class='{res.style.section}'>
+      <c:NpTextArea
+         visibleLines='30'
+         characterWidth='72'
+         styleName='{style.commitMessage}'
+         ui:field='message'/>
+    </div>
+    <div class='{res.style.section}'>
+      <g:Button ui:field='save'
+          title='Create new patch set with updated commit message'
+          styleName='{res.style.button}'>
+        <ui:attribute name='title'/>
+        <div><ui:msg>Save</ui:msg></div>
+      </g:Button>
+      <g:Button ui:field='cancel'
+          styleName='{res.style.button}'
+          addStyleNames='{style.cancel}'>
+          <div>Cancel</div>
+      </g:Button>
+    </div>
+  </g:HTMLPanel>
+</ui:UiBinder>

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

@@ -26,11 +26,6 @@ limitations under the License.
       max-height: 260px;
     }
 
-    .section {
-      padding: 5px 5px;
-      border-bottom: 1px solid #b8b8b8;
-    }
-
     .label_name {
       font-weight: bold;
       text-align: left;
@@ -46,16 +41,16 @@ limitations under the License.
     }
   </ui:style>
   <g:HTMLPanel styleName='{style.replyBox}'>
-    <div class='{style.section}'>
+    <div class='{res.style.section}'>
       <c:NpTextArea
          visibleLines='5'
          characterWidth='70'
          ui:field='message'/>
     </div>
-    <div class='{style.section}' ui:field='labelsParent'>
+    <div class='{res.style.section}' ui:field='labelsParent'>
       <g:Grid ui:field='labelsTable'/>
     </div>
-    <div class='{style.section}'>
+    <div class='{res.style.section}'>
       <g:Button ui:field='send'
           title='Send reply (Shortcut: Ctrl-Enter)'
           styleName='{res.style.button}'>

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

@@ -33,5 +33,6 @@ public interface Resources extends ClientBundle {
     String button();
     String popup();
     String popupContent();
+    String section();
   }
 }

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

@@ -49,3 +49,8 @@
   height: 10px;
   line-height: 10px;
 }
+
+.section {
+  padding: 5px 5px;
+  border-bottom: 1px solid #b8b8b8;
+}

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

@@ -102,6 +102,14 @@ public class ChangeApi {
     call(id, commit, "cherrypick").post(cherryPickInput, cb);
   }
 
+  /** Edit commit message for specific revision of a change. */
+  public static void message(int id, String commit, String message,
+      AsyncCallback<JavaScriptObject> cb) {
+    CherryPickInput input = CherryPickInput.create();
+    input.setMessage(message);
+    call(id, commit, "message").post(input, cb);
+  }
+
   /** Submit a specific revision of a change. */
   public static void submit(int id, String commit, AsyncCallback<SubmitInfo> cb) {
     SubmitInput in = SubmitInput.create();

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

@@ -58,6 +58,7 @@ public interface ChangeConstants extends Constants {
   String keyReload();
   String keyPublishComments();
   String keyEditTopic();
+  String keyEditMessage();
 
   String patchTableColumnName();
   String patchTableColumnComments();

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

@@ -38,6 +38,8 @@ nextPatchSet = Next patch set
 keyReload = Reload change
 keyPublishComments = Review and publish comments
 keyEditTopic = Edit change topic
+keyEditMessage = Edit commit message
+
 
 patchTableColumnName = File Path
 patchTableColumnComments = Comments

gerrit-server/src/main/java/com/google/gerrit/server/change/EditMessage.java

@@ -0,0 +1,126 @@
+// Copyright (C) 2013 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.server.change;
+
+import com.google.common.base.Strings;
+import com.google.gerrit.common.errors.EmailException;
+import com.google.gerrit.extensions.restapi.BadRequestException;
+import com.google.gerrit.extensions.restapi.DefaultInput;
+import com.google.gerrit.extensions.restapi.ResourceConflictException;
+import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.RestModifyView;
+import com.google.gerrit.extensions.webui.UiAction;
+import com.google.gerrit.reviewdb.client.PatchSet;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.ChangeUtil;
+import com.google.gerrit.server.GerritPersonIdent;
+import com.google.gerrit.server.IdentifiedUser;
+import com.google.gerrit.server.change.ChangeJson.ChangeInfo;
+import com.google.gerrit.server.change.EditMessage.Input;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.gerrit.server.mail.CommitMessageEditedSender;
+import com.google.gerrit.server.patch.PatchSetInfoNotAvailableException;
+import com.google.gerrit.server.project.InvalidChangeOperationException;
+import com.google.gerrit.server.project.NoSuchChangeException;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+
+import org.eclipse.jgit.errors.IncorrectObjectTypeException;
+import org.eclipse.jgit.errors.MissingObjectException;
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+import org.eclipse.jgit.lib.PersonIdent;
+import org.eclipse.jgit.lib.Repository;
+
+import java.io.IOException;
+
+class EditMessage implements RestModifyView<RevisionResource, Input>,
+    UiAction<RevisionResource> {
+
+  private final Provider<ReviewDb> dbProvider;
+  private final CommitMessageEditedSender.Factory commitMessageEditedSenderFactory;
+  private final GitRepositoryManager gitManager;
+  private final PersonIdent myIdent;
+  private final PatchSetInserter.Factory patchSetInserterFactory;
+  private final ChangeJson json;
+
+  static class Input {
+    @DefaultInput
+    String message;
+  }
+
+  @Inject
+  EditMessage(final Provider<ReviewDb> dbProvider,
+      final CommitMessageEditedSender.Factory commitMessageEditedSenderFactory,
+      final GitRepositoryManager gitManager,
+      final PatchSetInserter.Factory patchSetInserterFactory,
+      @GerritPersonIdent final PersonIdent myIdent,
+      ChangeJson json) {
+    this.dbProvider = dbProvider;
+    this.commitMessageEditedSenderFactory = commitMessageEditedSenderFactory;
+    this.gitManager = gitManager;
+    this.myIdent = myIdent;
+    this.patchSetInserterFactory = patchSetInserterFactory;
+    this.json = json;
+  }
+
+  @Override
+  public ChangeInfo apply(RevisionResource rsrc, Input input)
+      throws BadRequestException, ResourceConflictException, EmailException,
+      OrmException, ResourceNotFoundException, IOException {
+    if (Strings.isNullOrEmpty(input.message)) {
+      throw new BadRequestException("message must be non-empty");
+    }
+
+    final Repository git;
+    try {
+      git = gitManager.openRepository(rsrc.getChange().getProject());
+    } catch (RepositoryNotFoundException e) {
+      throw new ResourceNotFoundException(e.getMessage());
+    }
+
+    try {
+      return json.format(ChangeUtil.editCommitMessage(
+          rsrc.getPatchSet().getId(),
+          rsrc.getControl().getRefControl(),
+          (IdentifiedUser) rsrc.getControl().getCurrentUser(),
+          input.message, dbProvider.get(),
+          commitMessageEditedSenderFactory, git, myIdent,
+          patchSetInserterFactory));
+    } catch (InvalidChangeOperationException e) {
+      throw new BadRequestException(e.getMessage());
+    } catch (MissingObjectException e) {
+      throw new ResourceConflictException(e.getMessage());
+    } catch (IncorrectObjectTypeException e) {
+      throw new ResourceConflictException(e.getMessage());
+    } catch (PatchSetInfoNotAvailableException e) {
+      throw new ResourceConflictException(e.getMessage());
+    } catch (NoSuchChangeException e) {
+      throw new ResourceNotFoundException();
+    } finally {
+      git.close();
+    }
+  }
+
+  @Override
+  public UiAction.Description getDescription(RevisionResource resource) {
+    PatchSet.Id current = resource.getChange().currentPatchSetId();
+    return new UiAction.Description()
+        .setLabel("Edit commit message")
+        .setVisible(resource.getChange().getStatus().isOpen()
+            && resource.getPatchSet().getId().equals(current)
+            && resource.getControl().canAddPatchSet());
+  }
+}

gerrit-server/src/main/java/com/google/gerrit/server/change/Module.java

@@ -69,6 +69,7 @@ public class Module extends RestApiModule {
     post(REVISION_KIND, "review").to(PostReview.class);
     post(REVISION_KIND, "submit").to(Submit.class);
     post(REVISION_KIND, "rebase").to(Rebase.class);
+    post(REVISION_KIND, "message").to(EditMessage.class);
     get(REVISION_KIND, "patch").to(GetPatch.class);
     get(REVISION_KIND, "submit_type").to(TestSubmitType.Get.class);
     post(REVISION_KIND, "test.submit_rule").to(TestSubmitRule.class);