Merge changes from topic 'inline-3'

* changes:
  Add REST API to retrieve file's content type from revision
  InlineEdit: Add GET /changes/{id}/edit/{path}/type endpoint

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

@@ -516,4 +516,23 @@ public class ChangeEdits implements
       return BinaryResult.create(m).base64();
     }
   }
+
+  @Singleton
+  public static class GetType implements RestReadView<ChangeEditResource> {
+    private final FileContentUtil fileContentUtil;
+
+    @Inject
+    GetType(FileContentUtil fileContentUtil) {
+      this.fileContentUtil = fileContentUtil;
+    }
+
+    @Override
+    public String apply(ChangeEditResource rsrc)
+        throws ResourceNotFoundException, IOException {
+      return fileContentUtil.getContentType(
+          rsrc.getChangeEdit().getChange().getProject(),
+          rsrc.getChangeEdit().getRevision().get(),
+          rsrc.getPath());
+    }
+  }
 }

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

@@ -14,14 +14,18 @@
 
 package com.google.gerrit.server.change;
 
+import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
+
 import com.google.gerrit.extensions.restapi.BinaryResult;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.server.FileTypeRegistry;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
 import org.eclipse.jgit.lib.ObjectLoader;
+import org.eclipse.jgit.lib.ObjectReader;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevWalk;
@@ -33,10 +37,13 @@ import java.io.OutputStream;
 @Singleton
 public class FileContentUtil {
   private final GitRepositoryManager repoManager;
+  private final FileTypeRegistry registry;
 
   @Inject
-  FileContentUtil(GitRepositoryManager repoManager) {
+  FileContentUtil(GitRepositoryManager repoManager,
+      FileTypeRegistry ftr) {
     this.repoManager = repoManager;
+    this.registry = ftr;
   }
 
   public BinaryResult getContent(Project.NameKey project, String revstr,
@@ -68,4 +75,32 @@ public class FileContentUtil {
       repo.close();
     }
   }
+
+  public String getContentType(Project.NameKey project, String revstr,
+      String path) throws ResourceNotFoundException, IOException {
+    Repository repo = repoManager.openRepository(project);
+    try {
+      RevWalk rw = new RevWalk(repo);
+      ObjectReader reader = repo.newObjectReader();
+      try {
+        RevCommit commit = rw.parseCommit(repo.resolve(revstr));
+        TreeWalk tw =
+            TreeWalk.forPath(rw.getObjectReader(), path,
+                commit.getTree().getId());
+        if (tw == null) {
+          throw new ResourceNotFoundException();
+        }
+        ObjectLoader blobLoader = reader.open(tw.getObjectId(0), OBJ_BLOB);
+        byte[] raw = blobLoader.isLarge()
+            ? null
+            : blobLoader.getCachedBytes();
+        return registry.getMimeType(path, raw).toString();
+      } finally {
+        reader.release();
+        rw.release();
+      }
+    } finally {
+      repo.close();
+    }
+  }
 }

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

@@ -0,0 +1,41 @@
+// Copyright (C) 2014 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.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.RestReadView;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+
+import java.io.IOException;
+
+@Singleton
+public class GetContentType implements RestReadView<FileResource> {
+  private final FileContentUtil fileContentUtil;
+
+  @Inject
+  GetContentType(FileContentUtil fileContentUtil) {
+    this.fileContentUtil = fileContentUtil;
+  }
+
+  @Override
+  public String apply(FileResource rsrc)
+      throws ResourceNotFoundException, IOException {
+    return fileContentUtil.getContentType(
+        rsrc.getRevision().getControl().getProject().getNameKey(),
+        rsrc.getRevision().getPatchSet().getRevision().get(),
+        rsrc.getPatchKey().get());
+  }
+}

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

@@ -103,6 +103,7 @@ public class Module extends RestApiModule {
     put(FILE_KIND, "reviewed").to(PutReviewed.class);
     delete(FILE_KIND, "reviewed").to(DeleteReviewed.class);
     get(FILE_KIND, "content").to(GetContent.class);
+    get(FILE_KIND, "type").to(GetContentType.class);
     get(FILE_KIND, "diff").to(GetDiff.class);
 
     child(CHANGE_KIND, "edit").to(ChangeEdits.class);
@@ -114,6 +115,7 @@ public class Module extends RestApiModule {
     put(CHANGE_EDIT_KIND, "/").to(ChangeEdits.Put.class);
     delete(CHANGE_EDIT_KIND).to(ChangeEdits.DeleteContent.class);
     get(CHANGE_EDIT_KIND, "/").to(ChangeEdits.Get.class);
+    get(CHANGE_EDIT_KIND, "type").to(ChangeEdits.GetType.class);
 
     install(new FactoryModule() {
       @Override