Prevent right click from updating cursor position

Prevented right click from updating cursor position using
CodeMirror's "contextmenu" event.

Fixed overflow-x for file comments.

Change-Id: If285f4f64a6d3e796b2f814cd806b3d5d7b0f5cc

gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/CommentBox.java

@@ -21,6 +21,10 @@ import com.google.gerrit.client.diff.SideBySide2.DiffChunkInfo;
 import com.google.gerrit.client.diff.SidePanel.GutterWrapper;
 import com.google.gwt.core.client.Scheduler;
 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
+import com.google.gwt.event.dom.client.MouseOutEvent;
+import com.google.gwt.event.dom.client.MouseOutHandler;
+import com.google.gwt.event.dom.client.MouseOverEvent;
+import com.google.gwt.event.dom.client.MouseOverHandler;
 import com.google.gwt.user.client.ui.Composite;
 
 import net.codemirror.lib.CodeMirror;
@@ -57,6 +61,18 @@ abstract class CommentBox extends Composite {
           Configuration.create()
               .set("className", DiffTable.style.range()));
     }
+    addDomHandler(new MouseOverHandler() {
+      @Override
+      public void onMouseOver(MouseOverEvent event) {
+        setRangeHighlight(true);
+      }
+    }, MouseOverEvent.getType());
+    addDomHandler(new MouseOutHandler() {
+      @Override
+      public void onMouseOut(MouseOutEvent event) {
+        setRangeHighlight(isOpen());
+      }
+    }, MouseOutEvent.getType());
   }
 
   @Override

gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DiffTable.ui.xml

@@ -60,12 +60,15 @@ limitations under the License.
     .b .diff .CodeMirror-linenumber {
       background-color: #9f9;
     }
-    .padding, .fileComment {
+    .padding, .fileCommentRow {
       background-color: #eee;
     }
-    .fileComment {
+    .fileCommentRow {
       line-height: 1;
     }
+    .fileCommentCell {
+      overflow-x: auto;
+    }
     .a .CodeMirror-vscrollbar {
       display: none !important;
     }
@@ -119,11 +122,11 @@ limitations under the License.
                 <d:PatchSelectBox2 ui:field='patchSelectBoxB' />
               </td>
             </tr>
-            <tr ui:field='fileCommentRow' class='{style.fileComment}'>
-              <td ui:field='fileCommentCellA'>
+            <tr ui:field='fileCommentRow' class='{style.fileCommentRow}'>
+              <td ui:field='fileCommentCellA' class='{style.fileCommentCell}'>
                 <d:FileCommentPanel ui:field='fileCommentPanelA' />
               </td>
-              <td ui:field='fileCommentCellB'>
+              <td ui:field='fileCommentCellB' class='{style.fileCommentCell}'>
                 <d:FileCommentPanel ui:field='fileCommentPanelB' />
               </td>
             </tr>

gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/SideBySide2.java

@@ -68,6 +68,7 @@ import com.google.gwtexpui.user.client.DialogVisibleHandler;
 import com.google.gwtexpui.user.client.UserAgent;
 
 import net.codemirror.lib.CodeMirror;
+import net.codemirror.lib.CodeMirror.EventHandler;
 import net.codemirror.lib.CodeMirror.GutterClickHandler;
 import net.codemirror.lib.CodeMirror.LineClassWhere;
 import net.codemirror.lib.CodeMirror.LineHandle;
@@ -111,6 +112,7 @@ public class SideBySide2 extends Screen {
 
   private CodeMirror cmA;
   private CodeMirror cmB;
+  private CodeMirror lastFocused;
   private Timer scrollTimerA;
   private Timer scrollTimerB;
   private HandlerRegistration resizeHandler;
@@ -270,7 +272,19 @@ public class SideBySide2 extends Screen {
     };
     cm.on("renderLine", resizeLinePadding(getSideFromCm(cm)));
     cm.on("viewportChange", adjustGutters(cm));
-    // TODO: Prevent right click from updating the cursor.
+    cm.on("focus", new Runnable() {
+      @Override
+      public void run() {
+        lastFocused = cm;
+      }
+    });
+    cm.on("contextmenu", new EventHandler() {
+      @Override
+      public void handle(CodeMirror instance, NativeEvent event) {
+        CodeMirror.setObjectProperty(event, "codemirrorIgnore", true);
+        lastFocused.focus();
+      }
+    });
     cm.addKeyMap(KeyMap.create()
         .on("'j'", moveCursorDown(cm, 1))
         .on("'k'", moveCursorDown(cm, -1))

gerrit-gwtui/src/main/java/net/codemirror/lib/CodeMirror.java

@@ -295,6 +295,11 @@ public class CodeMirror extends JavaScriptObject {
     return this.display.scrollbarV;
   }-*/;
 
+  public static final native void setObjectProperty(JavaScriptObject obj,
+      String name, boolean value) /*-{
+    obj[name] = value;
+  }-*/;
+
   protected CodeMirror() {
   }