[vcs-log] highlighter for unindexed commits

platform/util/resources/misc/registry.properties

@@ -298,6 +298,8 @@ vcs.log.keep.up.to.date=true
 vcs.log.keep.up.to.date.description=Load log on start after heavy tasks are completed and keep it up to date even when not visible
 vcs.log.labels.redesign=false
 vcs.log.labels.redesign.description=Show branch labels on the right with combined tag icons, do not display tag names, combine tracked branches, display detached heads with an exclamation mark
+vcs.log.highlight.not.indexed=false
+vcs.log.highlight.not.indexed.description=Highlight commits that are not indexed
 
 vcs.executable.validator.timeout.sec=60
 vcs.unversioned.files.in.commit=true

platform/vcs-log/impl/src/META-INF/vcs-log.xml

@@ -22,6 +22,7 @@
     <logHighlighterFactory implementation="com.intellij.vcs.log.ui.MyCommitsHighlighter$Factory"/>
     <logHighlighterFactory implementation="com.intellij.vcs.log.ui.MergeCommitsHighlighter$Factory"/>
     <logHighlighterFactory implementation="com.intellij.vcs.log.ui.CurrentBranchHighlighter$Factory"/>
+    <logHighlighterFactory implementation="com.intellij.vcs.log.ui.IndexHighlighter$Factory"/>
 
     <postStartupActivity implementation="com.intellij.vcs.log.impl.VcsProjectLog$InitLogStartupActivity"/>
   </extensions>

platform/vcs-log/impl/src/com/intellij/vcs/log/data/index/VcsLogIndex.java

@@ -25,6 +25,8 @@ import java.util.Set;
 public interface VcsLogIndex {
   void scheduleIndex(boolean full);
 
+  boolean isIndexed(int commit);
+
   void markForIndexing(int commit, @NotNull VirtualFile root);
 
   boolean canFilter(@NotNull List<VcsLogDetailsFilter> filters);

platform/vcs-log/impl/src/com/intellij/vcs/log/data/index/VcsLogPersistentIndex.java

@@ -166,6 +166,7 @@ public class VcsLogPersistentIndex implements VcsLogIndex, Disposable {
     }
   }
 
+  @Override
   public boolean isIndexed(int commit) {
     try {
       return myMessagesIndex.get(commit) != null &&

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/IndexHighlighter.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * 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.intellij.vcs.log.ui;
+
+import com.intellij.openapi.util.registry.Registry;
+import com.intellij.ui.JBColor;
+import com.intellij.vcs.log.*;
+import com.intellij.vcs.log.data.VcsLogData;
+import com.intellij.vcs.log.data.index.VcsLogIndex;
+import org.jetbrains.annotations.NotNull;
+
+public class IndexHighlighter implements VcsLogHighlighter {
+  public static final JBColor NOT_INDEXED_COMMIT_FOREGROUND = JBColor.BLUE;
+  @NotNull private final VcsLogData myLogData;
+
+  public IndexHighlighter(@NotNull VcsLogData logData) {
+    myLogData = logData;
+  }
+
+  @NotNull
+  @Override
+  public VcsCommitStyle getStyle(@NotNull VcsShortCommitDetails details, boolean isSelected) {
+    if (isSelected || !Registry.is("vcs.log.highlight.not.indexed")) return VcsCommitStyle.DEFAULT;
+    VcsLogIndex index = myLogData.getIndex();
+    if (!index.isIndexed(myLogData.getCommitIndex(details.getId(), details.getRoot()))) {
+      return VcsCommitStyleFactory.foreground(NOT_INDEXED_COMMIT_FOREGROUND);
+    }
+    return VcsCommitStyle.DEFAULT;
+  }
+
+  @Override
+  public void update(@NotNull VcsLogDataPack dataPack, boolean refreshHappened) {
+  }
+
+  public static class Factory implements VcsLogHighlighterFactory {
+    @NotNull private static final String ID = "INDEXED_COMMITS";
+
+    @NotNull
+    @Override
+    public VcsLogHighlighter createHighlighter(@NotNull VcsLogData logData, @NotNull VcsLogUi logUi) {
+      return new IndexHighlighter(logData);
+    }
+
+    @NotNull
+    @Override
+    public String getId() {
+      return ID;
+    }
+
+    @NotNull
+    @Override
+    public String getTitle() {
+      return "Indexed Commits";
+    }
+
+    @Override
+    public boolean showMenuItem() {
+      return false;
+    }
+  }
+}

platform/vcs-log/impl/test/com/intellij/vcs/log/data/VisiblePackBuilderTest.kt

@@ -248,6 +248,10 @@ class VisiblePackBuilderTest {
   }
 
   class EmptyIndex : VcsLogIndex {
+    override fun isIndexed(commit: Int): Boolean {
+      return false
+    }
+
     override fun canFilter(filters: MutableList<VcsLogDetailsFilter>): Boolean {
       return false
     }