CHE-3583: Add new line to message area in Git commit window when Ente…

…r pressed (eclipse-che#4280)

ide/che-core-ide-ui/src/main/java/org/eclipse/che/ide/ui/ShiftableTextArea.java

@@ -0,0 +1,41 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2017 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.ide.ui;
+
+import com.google.gwt.dom.client.NativeEvent;
+import com.google.gwt.user.client.ui.TextArea;
+
+import org.eclipse.che.ide.ui.smartTree.KeyboardNavigationHandler;
+
+/**
+ * Text Area widget that supports shifting to new line by pressing Enter key.
+ *
+ * @author Igor Vinokur
+ */
+public class ShiftableTextArea extends TextArea {
+    public ShiftableTextArea() {
+        super();
+        initializeEnterKeyHandler();
+    }
+
+    private void initializeEnterKeyHandler() {
+        new KeyboardNavigationHandler(this) {
+            @Override
+            public void onEnter(NativeEvent evt) {
+                super.onEnter(evt);
+
+                int cursorPos = getCursorPos();
+                setText(new StringBuilder(getText()).insert(cursorPos, '\n').toString());
+                setCursorPos(cursorPos + 1);
+            }
+        };
+    }
+}

plugins/plugin-git/che-plugin-git-ext-git/src/main/java/org/eclipse/che/ide/ext/git/client/commit/CommitViewImpl.java

@@ -12,6 +12,7 @@
 
 import org.eclipse.che.ide.ext.git.client.GitLocalizationConstant;
 import org.eclipse.che.ide.ext.git.client.GitResources;
+import org.eclipse.che.ide.ui.ShiftableTextArea;
 import org.eclipse.che.ide.ui.window.Window;
 
 import com.google.gwt.core.client.GWT;
@@ -69,7 +70,7 @@ interface CommitViewImplUiBinder extends UiBinder<Widget, CommitViewImpl> {
     /**
      * The commit message input field.
      */
-    @UiField
+    @UiField(provided = true)
     TextArea message;
     Button btnCommit;
     Button btnCancel;
@@ -89,6 +90,7 @@ interface CommitViewImplUiBinder extends UiBinder<Widget, CommitViewImpl> {
     protected CommitViewImpl(GitResources res, GitLocalizationConstant locale) {
         this.res = res;
         this.locale = locale;
+        this.message = new ShiftableTextArea();
         this.ensureDebugId("git-commit-window");
 
         Widget widget = ourUiBinder.createAndBindUi(this);