Plugin that implements a table to render labels in change screen

This plugin adds a user preference that allows users to choose a table
control to render the labels/approvals on the change screen (similar
to how labels/approvals were rendered on the old change screen).

The table has one row per reviewer and one column per label.

Some users prefer the table view because it's easier to see which user
has already voted and whether there are users that haven't voted yet.

Change-Id: I57e8d5137f95f9a2553b2090ee0cb911fafc4c6b
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/.buckconfig b/.buckconfig
new file mode 100644
index 0000000..cd69e63
--- /dev/null
+++ b/.buckconfig
@@ -0,0 +1,14 @@
+[alias]
+  labelui = //:labelui
+  plugin = //:labelui
+
+[java]
+  src_roots = java, resources
+
+[project]
+  ignore = .git
+
+[cache]
+  mode = dir
+  dir = buck-out/cache
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b4277e3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+/.buckversion
+/.buckd
+/.watchmanconfig
+/buck-out
+/bucklets
+/target
+/.classpath
+/.project
+/.settings/org.maven.ide.eclipse.prefs
+/.settings/org.eclipse.m2e.core.prefs
diff --git a/.settings/org.eclipse.core.resources.prefs b/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..0285a1b
--- /dev/null
+++ b/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,4 @@
+eclipse.preferences.version=1
+encoding//src/main/java=UTF-8
+encoding//src/test/java=UTF-8
+encoding//src/test/resources=UTF-8
diff --git a/.settings/org.eclipse.core.runtime.prefs b/.settings/org.eclipse.core.runtime.prefs
new file mode 100644
index 0000000..5a0ad22
--- /dev/null
+++ b/.settings/org.eclipse.core.runtime.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+line.separator=\n
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..2a585e4
--- /dev/null
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,346 @@
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+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_enum_constant_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_enum_declarations=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_explicitconstructorcall_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_increments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_inits=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_parameters=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_throws=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_invocation_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_field_declarations=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_local_declarations=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_parameterized_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_superinterfaces=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_parameters=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_ellipsis=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_parameterized_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_arguments=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_parameters=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_annotation_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_anonymous_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_array_initializer=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_block=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_constructor_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_constant=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_method_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_switch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_type_declaration=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_catch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_for=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_if=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_switch=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_synchronized=insert
+org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while=insert
+org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return=insert
+org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_throw=insert
+org.eclipse.jdt.core.formatter.insert_space_before_postfix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_prefix_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_conditional=insert
+org.eclipse.jdt.core.formatter.insert_space_before_question_in_wildcard=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for=do not insert
+org.eclipse.jdt.core.formatter.insert_space_before_unary_operator=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.join_lines_in_comments=true
+org.eclipse.jdt.core.formatter.join_wrapped_lines=true
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=true
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.lineSplit=80
+org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=3
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=false
+org.eclipse.jdt.core.formatter.tabulation.char=space
+org.eclipse.jdt.core.formatter.tabulation.size=2
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false
+org.eclipse.jdt.core.formatter.wrap_before_binary_operator=true
diff --git a/.settings/org.eclipse.jdt.ui.prefs b/.settings/org.eclipse.jdt.ui.prefs
new file mode 100644
index 0000000..7397758
--- /dev/null
+++ b/.settings/org.eclipse.jdt.ui.prefs
@@ -0,0 +1,60 @@
+eclipse.preferences.version=1
+editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
+formatter_profile=_Google Format
+formatter_settings_version=11
+org.eclipse.jdt.ui.ignorelowercasenames=true
+org.eclipse.jdt.ui.importorder=\#;com.google;com;dk;eu;junit;net;org;java;javax;
+org.eclipse.jdt.ui.ondemandthreshold=99
+org.eclipse.jdt.ui.staticondemandthreshold=99
+org.eclipse.jdt.ui.text.custom_code_templates=<?xml version\="1.0" encoding\="UTF-8" standalone\="no"?><templates/>
+sp_cleanup.add_default_serial_version_id=true
+sp_cleanup.add_generated_serial_version_id=false
+sp_cleanup.add_missing_annotations=false
+sp_cleanup.add_missing_deprecated_annotations=true
+sp_cleanup.add_missing_methods=false
+sp_cleanup.add_missing_nls_tags=false
+sp_cleanup.add_missing_override_annotations=true
+sp_cleanup.add_serial_version_id=false
+sp_cleanup.always_use_blocks=true
+sp_cleanup.always_use_parentheses_in_expressions=false
+sp_cleanup.always_use_this_for_non_static_field_access=false
+sp_cleanup.always_use_this_for_non_static_method_access=false
+sp_cleanup.convert_to_enhanced_for_loop=false
+sp_cleanup.correct_indentation=false
+sp_cleanup.format_source_code=false
+sp_cleanup.format_source_code_changes_only=false
+sp_cleanup.make_local_variable_final=true
+sp_cleanup.make_parameters_final=true
+sp_cleanup.make_private_fields_final=true
+sp_cleanup.make_type_abstract_if_missing_method=false
+sp_cleanup.make_variable_declarations_final=false
+sp_cleanup.never_use_blocks=false
+sp_cleanup.never_use_parentheses_in_expressions=true
+sp_cleanup.on_save_use_additional_actions=true
+sp_cleanup.organize_imports=false
+sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
+sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
+sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
+sp_cleanup.qualify_static_member_accesses_with_declaring_class=false
+sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
+sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_trailing_whitespaces=true
+sp_cleanup.remove_trailing_whitespaces_all=true
+sp_cleanup.remove_trailing_whitespaces_ignore_empty=false
+sp_cleanup.remove_unnecessary_casts=false
+sp_cleanup.remove_unnecessary_nls_tags=false
+sp_cleanup.remove_unused_imports=false
+sp_cleanup.remove_unused_local_variables=false
+sp_cleanup.remove_unused_private_fields=true
+sp_cleanup.remove_unused_private_members=false
+sp_cleanup.remove_unused_private_methods=true
+sp_cleanup.remove_unused_private_types=true
+sp_cleanup.sort_members=false
+sp_cleanup.sort_members_all=false
+sp_cleanup.use_blocks=false
+sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_parentheses_in_expressions=false
+sp_cleanup.use_this_for_non_static_field_access=false
+sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
+sp_cleanup.use_this_for_non_static_method_access=false
+sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
diff --git a/BUCK b/BUCK
new file mode 100644
index 0000000..a807191
--- /dev/null
+++ b/BUCK
@@ -0,0 +1,22 @@
+include_defs('//bucklets/gerrit_plugin.bucklet')
+
+gerrit_plugin(
+  name = 'labelui',
+  srcs = glob(['src/main/java/**/*.java']),
+  resources = glob(['src/main/**/*']),
+  gwt_module = 'com.googlesource.gerrit.plugins.labelui.LabelUI',
+  manifest_entries = [
+    'Gerrit-PluginName: labelui',
+    'Gerrit-ApiType: plugin',
+    'Gerrit-ApiVersion: 2.12-SNAPSHOT',
+    'Gerrit-Module: com.googlesource.gerrit.plugins.labelui.Module',
+    'Gerrit-HttpModule: com.googlesource.gerrit.plugins.labelui.HttpModule',
+  ],
+)
+
+# this is required for bucklets/tools/eclipse/project.py to work
+java_library(
+  name = 'classpath',
+  deps = [':labelui__plugin'],
+)
+
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
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+   "Licensor" shall mean the copyright owner or entity authorized by
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+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
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+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
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+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
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+   "Object" form shall mean any form resulting from mechanical
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+
+   "Work" shall mean the work of authorship, whether in Source or
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+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
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+   the Work and Derivative Works thereof.
+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
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+   and issue tracking systems that are managed by, or on behalf of, the
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+   excluding communication that is conspicuously marked or otherwise
+   designated in writing by the copyright owner as "Not a Contribution."
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+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
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+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
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+4. Redistribution. You may reproduce and distribute copies of the
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+   (a) You must give any other recipients of the Work or
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+
+   (c) You must retain, in the Source form of any Derivative Works
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+   (d) If the Work includes a "NOTICE" text file as part of its
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+       notices within Derivative Works that You distribute, alongside
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+   You may add Your own copyright statement to Your modifications and
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+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
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+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
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+Copyright [yyyy] [name of copyright owner]
+
+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.
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..9df7bf7
--- /dev/null
+++ b/VERSION
@@ -0,0 +1,5 @@
+# Used by BUCK to include "Implementation-Version" in plugin Manifest.
+# If this file doesn't exist the output of 'git describe' is used
+# instead.
+PLUGIN_VERSION = '2.12-SNAPSHOT'
+
diff --git a/lib/gerrit/BUCK b/lib/gerrit/BUCK
new file mode 100644
index 0000000..ae59eba
--- /dev/null
+++ b/lib/gerrit/BUCK
@@ -0,0 +1,20 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VER = '2.12-SNAPSHOT'
+REPO = MAVEN_LOCAL
+
+maven_jar(
+  name = 'plugin-api',
+  id = 'com.google.gerrit:gerrit-plugin-api:' + VER,
+  attach_source = False,
+  repository = REPO,
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'gwtui-api',
+  id = 'com.google.gerrit:gerrit-plugin-gwtui:' + VER,
+  attach_source = False,
+  repository = REPO,
+  license = 'Apache2.0',
+)
diff --git a/lib/gwt/BUCK b/lib/gwt/BUCK
new file mode 100644
index 0000000..662e776
--- /dev/null
+++ b/lib/gwt/BUCK
@@ -0,0 +1,32 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '2.7.0'
+
+maven_jar(
+  name = 'user',
+  id = 'com.google.gwt:gwt-user:' + VERSION,
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'dev',
+  id = 'com.google.gwt:gwt-dev:' + VERSION,
+  license = 'Apache2.0',
+  deps = [
+    ':javax-validation',
+    ':javax-validation_src',
+  ],
+  attach_source = False,
+  exclude = ['org/eclipse/jetty/*'],
+)
+
+maven_jar(
+  name = 'javax-validation',
+  id = 'javax.validation:validation-api:1.0.0.GA',
+  bin_sha1 = 'b6bd7f9d78f6fdaa3c37dae18a4bd298915f328e',
+  src_sha1 = '7a561191db2203550fbfa40d534d4997624cd369',
+  license = 'Apache2.0',
+  visibility = [],
+)
+
diff --git a/lib/ow2/BUCK b/lib/ow2/BUCK
new file mode 100644
index 0000000..db6c76c
--- /dev/null
+++ b/lib/ow2/BUCK
@@ -0,0 +1,32 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '5.0.3'
+
+maven_jar(
+  name = 'ow2-asm',
+  id = 'org.ow2.asm:asm:' + VERSION,
+  sha1 = 'dcc2193db20e19e1feca8b1240dbbc4e190824fa',
+  license = 'ow2',
+)
+
+maven_jar(
+  name = 'ow2-asm-analysis',
+  id = 'org.ow2.asm:asm-analysis:' + VERSION,
+  sha1 = 'c7126aded0e8e13fed5f913559a0dd7b770a10f3',
+  license = 'ow2',
+)
+
+maven_jar(
+  name = 'ow2-asm-tree',
+  id = 'org.ow2.asm:asm-tree:' + VERSION,
+  sha1 = '287749b48ba7162fb67c93a026d690b29f410bed',
+  license = 'ow2',
+)
+
+maven_jar(
+  name = 'ow2-asm-util',
+  id = 'org.ow2.asm:asm-util:' + VERSION,
+  sha1 = '1512e5571325854b05fb1efce1db75fcced54389',
+  license = 'ow2',
+)
+
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..a59d8f6
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,121 @@
+<!--
+Copyright (C) 2015 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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.googlesource.gerrit.plugins.labelui</groupId>
+  <artifactId>labelui</artifactId>
+  <packaging>jar</packaging>
+  <version>2.12-SNAPSHOT</version>
+  <name>labelui</name>
+
+  <properties>
+    <Gerrit-ApiType>plugin</Gerrit-ApiType>
+    <Gerrit-ApiVersion>${project.version}</Gerrit-ApiVersion>
+  </properties>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.4</version>
+        <configuration>
+          <includes>
+            <include>**/*.*</include>
+          </includes>
+          <archive>
+            <manifestEntries>
+              <Gerrit-PluginName>labelui</Gerrit-PluginName>
+              <Gerrit-Module>com.googlesource.gerrit.plugins.labelui.Module</Gerrit-Module>
+              <Gerrit-HttpModule>com.googlesource.gerrit.plugins.labelui.HttpModule</Gerrit-HttpModule>
+              <Implementation-Vendor>Gerrit Code Review</Implementation-Vendor>
+              <Implementation-URL>https://www.gerritcodereview.com/</Implementation-URL>
+
+              <Implementation-Title>${Gerrit-ApiType} ${project.artifactId}</Implementation-Title>
+              <Implementation-Version>${project.version}</Implementation-Version>
+
+              <Gerrit-ApiType>${Gerrit-ApiType}</Gerrit-ApiType>
+              <Gerrit-ApiVersion>${Gerrit-ApiVersion}</Gerrit-ApiVersion>
+            </manifestEntries>
+          </archive>
+        </configuration>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.3.2</version>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+          <encoding>UTF-8</encoding>
+        </configuration>
+      </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>gwt-maven-plugin</artifactId>
+        <version>2.7.0</version>
+        <configuration>
+          <module>com.googlesource.gerrit.plugins.labelui.LabelUI</module>
+          <disableClassMetadata>true</disableClassMetadata>
+          <disableCastChecking>true</disableCastChecking>
+          <webappDirectory>${project.build.directory}/classes/static</webappDirectory>
+        </configuration>
+        <executions>
+          <execution>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+    </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.google.gerrit</groupId>
+      <artifactId>gerrit-${Gerrit-ApiType}-api</artifactId>
+      <version>${Gerrit-ApiVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>com.google.gerrit</groupId>
+      <artifactId>gerrit-plugin-gwtui</artifactId>
+      <version>${Gerrit-ApiVersion}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>com.google.gwt</groupId>
+      <artifactId>gwt-user</artifactId>
+      <version>2.7.0</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+  <repositories>
+    <repository>
+      <id>snapshot-repository</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
+    </repository>
+  </repositories>
+</project>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/GetPreferences.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/GetPreferences.java
new file mode 100644
index 0000000..b1fd600
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/GetPreferences.java
@@ -0,0 +1,76 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui;
+
+import com.google.gerrit.extensions.annotations.PluginName;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.RestReadView;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.account.AccountResource;
+import com.google.gerrit.server.account.VersionedAccountPreferences;
+import com.google.gerrit.server.config.AllUsersName;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+
+import org.eclipse.jgit.errors.ConfigInvalidException;
+import org.eclipse.jgit.lib.Repository;
+
+import java.io.IOException;
+
+@Singleton
+public class GetPreferences implements RestReadView<AccountResource> {
+  private final String pluginName;
+  private final Provider<CurrentUser> self;
+  private final AllUsersName allUsersName;
+  private final GitRepositoryManager gitMgr;
+
+  @Inject
+  public GetPreferences(@PluginName String pluginName,
+      Provider<CurrentUser> self,
+      AllUsersName allUsersName,
+      GitRepositoryManager gitMgr) {
+    this.pluginName = pluginName;
+    this.self = self;
+    this.allUsersName = allUsersName;
+    this.gitMgr = gitMgr;
+  }
+
+  @Override
+  public PreferencesInfo apply(AccountResource rsrc) throws AuthException,
+      ResourceNotFoundException, IOException, ConfigInvalidException {
+    if (self.get() != rsrc.getUser()
+        && !self.get().getCapabilities().canModifyAccount()) {
+      throw new AuthException("not allowed to get preferences");
+    }
+
+    try (Repository git = gitMgr.openRepository(allUsersName)) {
+      VersionedAccountPreferences p =
+          VersionedAccountPreferences.forUser(rsrc.getUser().getAccountId());
+      p.load(git);
+
+      PreferencesInfo info = new PreferencesInfo();
+      info.ui =
+          p.getConfig().getEnum("plugin", pluginName, "ui", LabelUi.DEFAULT);
+      return info;
+    }
+  }
+
+  public static class PreferencesInfo {
+    LabelUi ui;
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/HttpModule.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/HttpModule.java
new file mode 100644
index 0000000..b62c172
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/HttpModule.java
@@ -0,0 +1,29 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui;
+
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.gerrit.extensions.webui.GwtPlugin;
+import com.google.gerrit.extensions.webui.WebUiPlugin;
+import com.google.gerrit.httpd.plugins.HttpPluginModule;
+
+public class HttpModule extends HttpPluginModule {
+
+  @Override
+  protected void configureServlets() {
+    DynamicSet.bind(binder(), WebUiPlugin.class)
+        .toInstance(new GwtPlugin("labelui"));
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUI.gwt.xml b/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUI.gwt.xml
new file mode 100644
index 0000000..8747138
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUI.gwt.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright (C) 2015 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.
+-->
+<module rename-to="labelui">
+  <!-- Inherit the core Web Toolkit stuff.                        -->
+  <inherits name="com.google.gwt.user.User"/>
+  <!-- Other module inherits                                      -->
+  <inherits name="com.google.gerrit.Plugin"/>
+  <inherits name="com.google.gwt.http.HTTP"/>
+  <!-- Using GWT built-in themes adds a number of static          -->
+  <!-- resources to the plugin. No theme inherits lines were      -->
+  <!-- added in order to make this plugin as simple as possible   -->
+  <!-- Specify the app entry point class.                         -->
+  <entry-point class="com.googlesource.gerrit.plugins.labelui.client.LabelUIPlugin"/>
+  <stylesheet src="labelui.css"/>
+</module>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUi.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUi.java
new file mode 100644
index 0000000..32ff7fa
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/LabelUi.java
@@ -0,0 +1,19 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui;
+
+public enum LabelUi {
+  DEFAULT, USER_LABEL_TABLE
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/Module.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/Module.java
new file mode 100644
index 0000000..a3b63c5
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/Module.java
@@ -0,0 +1,34 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui;
+
+import static com.google.gerrit.server.account.AccountResource.ACCOUNT_KIND;
+
+import com.google.gerrit.extensions.restapi.RestApiModule;
+import com.google.inject.AbstractModule;
+
+public class Module extends AbstractModule {
+
+  @Override
+  protected void configure() {
+    install(new RestApiModule() {
+      @Override
+      protected void configure() {
+        get(ACCOUNT_KIND, "preferences").to(GetPreferences.class);
+        put(ACCOUNT_KIND, "preferences").to(SetPreferences.class);
+      }
+    });
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/SetPreferences.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/SetPreferences.java
new file mode 100644
index 0000000..3cbc264
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/SetPreferences.java
@@ -0,0 +1,94 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui;
+
+import com.google.gerrit.extensions.annotations.PluginName;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.extensions.restapi.RestModifyView;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.account.AccountResource;
+import com.google.gerrit.server.account.VersionedAccountPreferences;
+import com.google.gerrit.server.config.AllUsersName;
+import com.google.gerrit.server.git.MetaDataUpdate;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+
+import com.googlesource.gerrit.plugins.labelui.GetPreferences.PreferencesInfo;
+import com.googlesource.gerrit.plugins.labelui.SetPreferences.Input;
+
+import org.eclipse.jgit.errors.ConfigInvalidException;
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+
+import java.io.IOException;
+
+public class SetPreferences implements RestModifyView<AccountResource, Input> {
+  public static class Input {
+    LabelUi ui;
+  }
+
+  private final String pluginName;
+  private final Provider<CurrentUser> self;
+  private final AllUsersName allUsersName;
+  private final Provider<MetaDataUpdate.User> metaDataUpdateFactory;
+
+  @Inject
+  public SetPreferences(@PluginName String pluginName,
+      Provider<CurrentUser> self,
+      AllUsersName allUsersName,
+      Provider<MetaDataUpdate.User> metaDataUpdateFactory) {
+    this.pluginName = pluginName;
+    this.self = self;
+    this.allUsersName = allUsersName;
+    this.metaDataUpdateFactory = metaDataUpdateFactory;
+  }
+
+  @Override
+  public GetPreferences.PreferencesInfo apply(AccountResource rsrc, Input input)
+      throws AuthException, RepositoryNotFoundException, IOException,
+      ConfigInvalidException {
+    if (self.get() != rsrc.getUser()
+        && !self.get().getCapabilities().canModifyAccount()) {
+      throw new AuthException("not allowed to set preferences");
+    }
+
+    if (input == null) {
+      input = new Input();
+    }
+    if (input.ui == null) {
+      input.ui = LabelUi.DEFAULT;
+    }
+
+    VersionedAccountPreferences p =
+        VersionedAccountPreferences.forUser(rsrc.getUser().getAccountId());
+    MetaDataUpdate md = metaDataUpdateFactory.get().create(allUsersName);
+    try {
+      p.load(md);
+
+      if (input.ui != LabelUi.DEFAULT) {
+        p.getConfig().setEnum("plugin", pluginName, "ui", input.ui);
+      } else {
+        p.getConfig().unset("plugin", pluginName, "ui");
+      }
+
+      p.commit(md);
+    } finally {
+      md.close();
+    }
+
+    PreferencesInfo info = new PreferencesInfo();
+    info.ui = input.ui;
+    return info;
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelPanel.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelPanel.java
new file mode 100644
index 0000000..76fc72c
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelPanel.java
@@ -0,0 +1,334 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui.client;
+
+import com.google.gerrit.client.GerritUiExtensionPoint;
+import com.google.gerrit.client.info.AccountInfo;
+import com.google.gerrit.client.info.AccountInfo.AvatarInfo;
+import com.google.gerrit.client.info.ChangeInfo;
+import com.google.gerrit.client.info.ChangeInfo.ApprovalInfo;
+import com.google.gerrit.client.info.ChangeInfo.LabelInfo;
+import com.google.gerrit.client.rpc.Natives;
+import com.google.gerrit.plugin.client.Plugin;
+import com.google.gerrit.plugin.client.extension.Panel;
+import com.google.gerrit.plugin.client.rpc.RestApi;
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.dom.client.Style;
+import com.google.gwt.dom.client.Style.Cursor;
+import com.google.gwt.dom.client.Style.Display;
+import com.google.gwt.dom.client.Style.TextAlign;
+import com.google.gwt.dom.client.Style.Unit;
+import com.google.gwt.resources.client.ImageResource;
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.google.gwt.user.client.ui.Grid;
+import com.google.gwt.user.client.ui.HTMLTable.CellFormatter;
+import com.google.gwt.user.client.ui.HorizontalPanel;
+import com.google.gwt.user.client.ui.Image;
+import com.google.gwt.user.client.ui.Label;
+import com.google.gwt.user.client.ui.VerticalPanel;
+import com.google.gwt.user.client.ui.Widget;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
+public class LabelPanel extends VerticalPanel {
+  static class Factory implements Panel.EntryPoint {
+    @Override
+    public void onLoad(Panel panel) {
+      panel.setWidget(new LabelPanel(panel));
+    }
+  }
+
+  private final static String COLOR_GREEN = "#060";
+  private final static String COLOR_RED = "#F00";
+
+  LabelPanel(final Panel panel) {
+    new RestApi("accounts").id("self").view(Plugin.get().getPluginName(), "preferences")
+        .get(new AsyncCallback<PreferencesInfo>() {
+          @Override
+          public void onSuccess(PreferencesInfo result) {
+            LabelUIPlugin.refreshDefaultLabelUi(result.ui());
+            ChangeInfo change =
+                panel.getObject(GerritUiExtensionPoint.Key.CHANGE_INFO).cast();
+            switch (result.ui()) {
+              case USER_LABEL_TABLE:
+                displayUserLabelTable(change);
+                break;
+              case DEFAULT:
+              default:
+                return;
+            }
+          }
+
+          @Override
+          public void onFailure(Throwable caught) {
+            // never invoked
+          }
+        });
+  }
+
+  private void displayUserLabelTable(ChangeInfo change) {
+    Set<String> labelNames = getLabelNames(change);
+    Map<String, AccountInfo> users = getUserMap(labelNames, change);
+    Map<Integer, VotableInfo> votable = votable(change);
+    Grid g = createGrid(users.size() + 1, labelNames.size() + 1);
+
+    int i = 1;
+    for (String labelName : labelNames) {
+      g.setWidget(0, i, createLabelLabel(change.label(labelName)));
+      i++;
+    }
+
+    i = 1;
+    for (AccountInfo account : users.values()) {
+      g.setWidget(i, 0, createUserWidget(account));
+
+      int j = 1;
+      for (String labelName : labelNames) {
+        LabelInfo label = change.label(labelName);
+        ApprovalInfo ai = label.forUser(account._accountId());
+        g.setWidget(i, j, createLabelValueWidget(label, ai));
+
+        if (!votable.get(account._accountId()).isVotable(labelName)) {
+          formatNonVotable(g, i, j);
+        }
+        j++;
+      }
+      i++;
+    }
+
+    add(g);
+  }
+
+  private static Grid createGrid(int rows, int columns) {
+    Grid g = new Grid(rows, columns);
+    g.addStyleName("infoBlock");
+    g.addStyleName("changeTable");
+
+    CellFormatter fmt = g.getCellFormatter();
+    fmt.addStyleName(0, 0, "leftMostCell");
+    fmt.addStyleName(0, 0, "topmost");
+
+    for (int c = 1; c < columns; c++) {
+      fmt.addStyleName(0, c, "header");
+      fmt.addStyleName(0, c, "topmost");
+    }
+
+    for (int r = 1; r < rows; r++) {
+      fmt.addStyleName(r, 0, "leftMostCell");
+      fmt.addStyleName(r, 0, "header");
+
+      for (int c = 1; c < columns; c++) {
+        fmt.addStyleName(r, c, "dataCell");
+      }
+    }
+
+    for (int c = 0; c < columns; c++) {
+      fmt.addStyleName(rows - 1, c, "bottomheader");
+    }
+
+    return g;
+  }
+
+  private static Set<String> getLabelNames(ChangeInfo change) {
+    return new TreeSet<String>(change.labels());
+  }
+
+  private static Map<String, AccountInfo> getUserMap(Set<String> labelNames,
+      ChangeInfo change) {
+    Map<String, AccountInfo> users = new TreeMap<>();
+    for (String labelName : labelNames) {
+      LabelInfo label = change.label(labelName);
+      for (ApprovalInfo ai : Natives.asList(label.all())) {
+        users.put(ai.name(), ai);
+      }
+    }
+    return users;
+  }
+
+  private static Widget createLabelValueWidget(LabelInfo label, ApprovalInfo ai) {
+    int accountId = ai._accountId();
+    String formattedValue = formatValue(ai.value());
+    String valueText = label.valueText(formattedValue);
+    if (label.approved() != null
+        && label.approved()._accountId() == accountId) {
+      return createImage(LabelUIPlugin.RESOURCES.greenCheck(), valueText);
+    } else if (label.rejected() != null
+        && label.rejected()._accountId() == accountId) {
+      return createImage(LabelUIPlugin.RESOURCES.redNot(), valueText);
+    } else {
+      return createValueLabel(formattedValue, valueText, ai.value());
+    }
+  }
+
+  private static Label createLabelLabel(LabelInfo label) {
+    Label l = new Label(label.name());
+    Style s = l.getElement().getStyle();
+    s.setCursor(Cursor.DEFAULT);
+    if (label.rejected() != null) {
+      s.setColor(COLOR_RED);
+      l.setTitle("Rejected by " + label.rejected().name());
+    } else if (label.approved() != null) {
+      s.setColor(COLOR_GREEN);
+      l.setTitle("Approved by " + label.approved().name());
+    }
+    return l;
+  }
+
+  private static Widget createUserWidget(AccountInfo account) {
+    HorizontalPanel p = new HorizontalPanel();
+    Label l = new Label(account.name());
+    if (account.hasAvatarInfo()) {
+      p.add(createAvatar(account));
+      l.getElement().getStyle().setMarginTop(3, Unit.PX);
+    }
+
+    l.getElement().getStyle().setCursor(Cursor.DEFAULT);
+    l.setTitle(formatToolTip(account));
+    p.add(l);
+    return p;
+  }
+
+  private static Image createAvatar(AccountInfo account) {
+    int size = 16;
+    AvatarInfo avatar = account.avatar(size);
+    if (avatar == null) {
+      avatar = account.avatar(AvatarInfo.DEFAULT_SIZE);
+    }
+    String url;
+    if (avatar == null) {
+      RestApi api =
+          new RestApi("/accounts/").id(account._accountId()).view("avatar")
+              .addParameter("s", size);
+      url = GWT.getHostPageBaseURL() + api.path().substring(1);
+    } else {
+      url = avatar.url();
+    }
+    Image avatarImage = new Image(url);
+    avatarImage.setSize("", size + "px");
+    return avatarImage;
+  }
+
+  private static String formatToolTip(AccountInfo ai) {
+    StringBuilder b = new StringBuilder();
+    b.append(ai.name());
+    if (ai.email() != null) {
+      b.append(" <");
+      b.append(ai.email());
+      b.append(">");
+    }
+    return b.toString();
+  }
+
+  private static Image createImage(ImageResource imageResource, String valueText) {
+    Image image = new Image(imageResource);
+    if (valueText != null) {
+      image.setTitle(valueText);
+    }
+    center(image);
+    return image;
+  }
+
+  private static void center(Image image) {
+    Style s =  image.getElement().getStyle();
+    s.setProperty("margin-left", "auto");
+    s.setProperty("margin-right", "auto");
+    s.setDisplay(Display.BLOCK);
+  }
+
+  public static Label createValueLabel(String formattedValue, String valueText, short value) {
+    Label l = new Label(formattedValue);
+    if (valueText != null) {
+      l.setTitle(valueText);
+    }
+    Style s =  l.getElement().getStyle();
+    s.setTextAlign(TextAlign.CENTER);
+    s.setCursor(Cursor.DEFAULT);
+    if (value > 0) {
+      s.setColor(COLOR_GREEN);
+    } else if (value < 0) {
+      s.setColor(COLOR_RED);
+    } else {
+      // make label invisible, we cannot omit it since we need the label to show
+      // a tooltip
+      s.setColor("transparent");
+    }
+    return l;
+  }
+
+  private static String formatValue(short value) {
+    if (value < 0) {
+      return Short.toString(value);
+    } else if (value == 0) {
+      return " 0";
+    } else {
+      return "+" + Short.toString(value);
+    }
+  }
+
+  private static void formatNonVotable(Grid g, int row, int column) {
+    Widget w = g.getWidget(row, column);
+    g.getCellFormatter().addStyleName(row, column, "header");
+    w.setTitle("cannot vote on this label");
+  }
+
+  private static Map<Integer, VotableInfo> votable(ChangeInfo change) {
+    Map<Integer, VotableInfo> d = new HashMap<>();
+    for (String name : change.labels()) {
+      LabelInfo label = change.label(name);
+      if (label.all() != null) {
+        for (ApprovalInfo ai : Natives.asList(label.all())) {
+          int id = ai._accountId();
+          VotableInfo ad = d.get(id);
+          if (ad == null) {
+            ad = new VotableInfo();
+            d.put(id, ad);
+          }
+          if (ai.hasValue()) {
+            ad.votable(name);
+          }
+        }
+      }
+    }
+    return d;
+  }
+
+  private static class VotableInfo {
+    private Set<String> votable;
+
+    void votable(String label) {
+      if (votable == null) {
+        votable = new HashSet<>();
+      }
+      votable.add(label);
+    }
+
+    Set<String> votableLabels() {
+      Set<String> s = new HashSet<>();
+      if (votable != null) {
+        s.addAll(votable);
+      }
+      return s;
+    }
+
+    boolean isVotable(String label) {
+      return votableLabels().contains(label);
+    }
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUIPlugin.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUIPlugin.java
new file mode 100644
index 0000000..5937bd1
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUIPlugin.java
@@ -0,0 +1,78 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui.client;
+
+import com.google.gerrit.client.GerritUiExtensionPoint;
+import com.google.gerrit.client.Resources;
+import com.google.gerrit.plugin.client.Plugin;
+import com.google.gerrit.plugin.client.PluginEntryPoint;
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.dom.client.Element;
+import com.google.gwt.user.client.ui.RootPanel;
+
+import com.googlesource.gerrit.plugins.labelui.client.PreferencesInfo.LabelUi;
+
+public class LabelUIPlugin extends PluginEntryPoint {
+  public static final Resources RESOURCES = GWT.create(Resources.class);
+
+  private final static String DEFAULT_LABELS_CLASS =
+      "com-google-gerrit-client-change-ChangeScreen_BinderImpl_GenCss_style-labels";
+  private final static String HIDE_DEFAULT_LABELS_CLASS = Plugin.get()
+      .getName() + "-hideDefaultLabels";
+
+  @Override
+  public void onPluginLoad() {
+    injectCssToHideDefaultLabels();
+
+    Plugin.get().panel(
+        GerritUiExtensionPoint.CHANGE_SCREEN_BELOW_CHANGE_INFO_BLOCK,
+        new LabelPanel.Factory());
+    Plugin.get().panel(
+        GerritUiExtensionPoint.PREFERENCES_SCREEN_BOTTOM,
+        new LabelUiPreferencesPanel.Factory());
+  }
+
+  public static void refreshDefaultLabelUi(LabelUi ui) {
+    if (ui == LabelUi.DEFAULT) {
+      showDefaultLabelUi();
+    } else {
+      hideDefaultLabelUi();
+    }
+  }
+
+  private static void hideDefaultLabelUi() {
+    Element body = RootPanel.getBodyElement();
+    if (!body.hasClassName(HIDE_DEFAULT_LABELS_CLASS)) {
+      body.addClassName(HIDE_DEFAULT_LABELS_CLASS);
+    }
+  }
+
+  private static void showDefaultLabelUi() {
+    RootPanel.getBodyElement().removeClassName(HIDE_DEFAULT_LABELS_CLASS);
+  }
+
+  private static void injectCssToHideDefaultLabels() {
+    StringBuilder css = new StringBuilder();
+    css.append(".");
+    css.append(HIDE_DEFAULT_LABELS_CLASS);
+    css.append(" .");
+    css.append(DEFAULT_LABELS_CLASS);
+    css.append(" {display: none;}");
+    injectCss(css.toString());
+  }
+
+  private final static native void injectCss(String css)
+  /*-{ return $wnd.Gerrit.injectCss(css) }-*/;
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUiPreferencesPanel.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUiPreferencesPanel.java
new file mode 100644
index 0000000..62de8e1
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/LabelUiPreferencesPanel.java
@@ -0,0 +1,98 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui.client;
+
+import com.google.gerrit.plugin.client.Plugin;
+import com.google.gerrit.plugin.client.extension.Panel;
+import com.google.gerrit.plugin.client.rpc.RestApi;
+import com.google.gwt.dom.client.Style.Unit;
+import com.google.gwt.event.dom.client.ChangeEvent;
+import com.google.gwt.event.dom.client.ChangeHandler;
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.google.gwt.user.client.ui.HorizontalPanel;
+import com.google.gwt.user.client.ui.Label;
+import com.google.gwt.user.client.ui.ListBox;
+import com.google.gwt.user.client.ui.VerticalPanel;
+
+public class LabelUiPreferencesPanel extends VerticalPanel {
+  static class Factory implements Panel.EntryPoint {
+    @Override
+    public void onLoad(Panel panel) {
+      panel.setWidget(new LabelUiPreferencesPanel());
+    }
+  }
+
+  LabelUiPreferencesPanel() {
+    new RestApi("accounts").id("self")
+        .view(Plugin.get().getPluginName(), "preferences")
+        .get(new AsyncCallback<PreferencesInfo>() {
+          @Override
+          public void onSuccess(PreferencesInfo result) {
+            display(result);
+          }
+
+          @Override
+          public void onFailure(Throwable caught) {
+            // never invoked
+          }
+        });
+  }
+
+  private void display(PreferencesInfo info) {
+    Label heading = new Label(Plugin.get().getName() + " plugin");
+    heading.setStyleName("smallHeading");
+    add(heading);
+    HorizontalPanel p = new HorizontalPanel();
+    add(p);
+
+    Label label = new Label("Label UI:");
+    p.add(label);
+    label.getElement().getStyle().setMarginRight(5, Unit.PX);
+    label.getElement().getStyle().setMarginTop(2, Unit.PX);
+    final ListBox ui = new ListBox();
+    p.add(ui);
+
+    for (PreferencesInfo.LabelUi v : PreferencesInfo.LabelUi.values()) {
+      ui.addItem(v.name(), v.name());
+    }
+
+    for (int i = 0; i < ui.getItemCount(); i++) {
+      if (info.ui().name().equals(ui.getValue(i))) {
+        ui.setSelectedIndex(i);
+        break;
+      }
+    }
+
+    ui.addChangeHandler(new ChangeHandler() {
+      @Override
+      public void onChange(ChangeEvent event) {
+        PreferencesInfo info = PreferencesInfo.create();
+        info.ui(ui.getSelectedValue());
+        new RestApi("accounts").id("self")
+            .view(Plugin.get().getPluginName(), "preferences")
+            .put(info, new AsyncCallback<PreferencesInfo>() {
+              @Override
+              public void onSuccess(PreferencesInfo result) {
+              }
+
+              @Override
+              public void onFailure(Throwable caught) {
+                // never invoked
+              }
+            });
+      }
+    });
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/labelui/client/PreferencesInfo.java b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/PreferencesInfo.java
new file mode 100644
index 0000000..d764ef2
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/labelui/client/PreferencesInfo.java
@@ -0,0 +1,37 @@
+// Copyright (C) 2015 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.googlesource.gerrit.plugins.labelui.client;
+
+import com.google.gwt.core.client.JavaScriptObject;
+
+public class PreferencesInfo extends JavaScriptObject {
+  public static enum LabelUi {
+    DEFAULT, USER_LABEL_TABLE
+  }
+
+  public static PreferencesInfo create() {
+    return (PreferencesInfo) createObject();
+  }
+
+  public final LabelUi ui() {
+    return LabelUi.valueOf(_ui());
+  }
+
+  private final native String _ui() /*-{ return this.ui; }-*/;
+  public  final native void ui(String n) /*-{ if(n)this.ui=n; }-*/;
+
+  protected PreferencesInfo() {
+  }
+}
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
new file mode 100644
index 0000000..511b6d6
--- /dev/null
+++ b/src/main/resources/Documentation/about.md
@@ -0,0 +1,20 @@
+The @PLUGIN@ plugin allows users to configure a different control for
+displaying the labels/approvals on the change screen.
+
+User can configure the label UI under `Settings` > `Preferences` >
+`Label UI`:
+
+![PreferencesScreenshot](images/preferences.png)
+
+### `DEFAULT`
+
+The Gerrit default control for labels/approvals:
+
+![DefaultApprovalsScreenshot](images/default-approvals.png)
+
+### `USER_LABEL_TABLE`
+
+Renders the labels/approvals as a table with one row per user and
+labels as columns:
+
+![ApprovalTableScreenshot](images/user-label-table.png)
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
new file mode 100644
index 0000000..c00a9d0
--- /dev/null
+++ b/src/main/resources/Documentation/build.md
@@ -0,0 +1,82 @@
+Build
+=====
+
+This plugin can be built with Buck or Maven.
+
+Buck
+----
+
+Two build modes are supported: Standalone and in Gerrit tree.
+The standalone build mode is recommended, as this mode doesn't require
+the Gerrit tree to exist locally.
+
+
+
+Clone bucklets library:
+
+```
+  git clone https://gerrit.googlesource.com/bucklets
+
+```
+and link it to @PLUGIN@ plugin directory:
+
+```
+  cd @PLUGIN@ && ln -s ../bucklets .
+```
+
+Add link to the .buckversion file:
+
+```
+  cd @PLUGIN@ && ln -s bucklets/buckversion .buckversion
+```
+
+Add link to the .watchmanconfig file:
+```
+  cd @PLUGIN@ && ln -s bucklets/watchmanconfig .watchmanconfig
+```
+
+To build the plugin, issue the following command:
+
+
+```
+  buck build plugin
+```
+
+The output is created in
+
+```
+  buck-out/gen/@PLUGIN@.jar
+```
+
+
+Clone or link this plugin to the plugins directory of Gerrit's source
+tree, and issue the command:
+
+```
+  buck build plugins/@PLUGIN@
+```
+
+The output is created in
+
+```
+  buck-out/gen/plugins/@PLUGIN@/@PLUGIN@.jar
+```
+
+This project can be imported into the Eclipse IDE:
+
+```
+  ./tools/eclipse/project.py
+```
+
+Maven
+-----
+
+Note that the Maven build is provided for compatibility reasons, but
+it is considered to be deprecated and will be removed in a future
+version of this plugin.
+
+To build with Maven, run
+
+```
+mvn clean package
+```
diff --git a/src/main/resources/Documentation/images/default-approvals.png b/src/main/resources/Documentation/images/default-approvals.png
new file mode 100644
index 0000000..f187f1a
--- /dev/null
+++ b/src/main/resources/Documentation/images/default-approvals.png
Binary files differ
diff --git a/src/main/resources/Documentation/images/preferences.png b/src/main/resources/Documentation/images/preferences.png
new file mode 100644
index 0000000..3ab252e
--- /dev/null
+++ b/src/main/resources/Documentation/images/preferences.png
Binary files differ
diff --git a/src/main/resources/Documentation/images/user-label-table.png b/src/main/resources/Documentation/images/user-label-table.png
new file mode 100644
index 0000000..571eedb
--- /dev/null
+++ b/src/main/resources/Documentation/images/user-label-table.png
Binary files differ
diff --git a/src/main/resources/Documentation/rest-api-accounts.md b/src/main/resources/Documentation/rest-api-accounts.md
new file mode 100644
index 0000000..bc69c71
--- /dev/null
+++ b/src/main/resources/Documentation/rest-api-accounts.md
@@ -0,0 +1,80 @@
+@PLUGIN@ - /accounts/ REST API
+==============================
+
+This page describes the '/accounts/' REST endpoints that are added by
+the @PLUGIN@ plugin.
+
+Please also take note of the general information on the
+[REST API](../../../Documentation/rest-api.html).
+
+<a id="project-endpoints"> @PLUGIN@ Endpoints
+--------------------------------------------
+
+### <a id="get-preferences"> Get Preferences
+_GET /accounts/[\{account-id\}](../../../Documentation/rest-api-accounts.html#account-id)/@PLUGIN@~preferences_
+
+Gets the preferences of a user for the @PLUGIN@ plugin.
+
+#### Request
+
+```
+  GET /accounts/self/@PLUGIN@~preferences HTTP/1.0
+```
+
+As response a [PreferencesInfo](#preferences-info) entity is returned
+that contains the preferences of a user for the @PLUGIN@ plugin.
+
+#### Response
+
+```
+  HTTP/1.1 200 OK
+  Content-Disposition: attachment
+  Content-Type: application/json;charset=UTF-8
+
+  )]}'
+  {
+    "ui": "TABLE"
+  }
+```
+
+### <a id="put-preferences"> Put Preferences
+_PUT /accounts/[\{account-id\}](../../../Documentation/rest-api-accounts.html#account-id)/@PLUGIN@~preferences_
+
+Sets the user preferences for the @PLUGIN@ plugin.
+
+The new preferences must be specified as a [PreferenceInfo](#preference-info)
+entity in the request body. Not setting a parameter means that the
+parameters are set to the defaults.
+
+#### Request
+
+```
+  PUT /accounts/self/@PLUGIN@~preferences HTTP/1.0
+  Content-Type: application/json;charset=UTF-8
+
+  {
+    "ui": "TABLE"
+  }
+```
+
+
+<a id="json-entities">JSON Entities
+-----------------------------------
+
+### <a id="preferences-info"></a>PreferencesInfo
+
+The `PreferencesInfo` entity contains the preferences of the @PLUGIN@
+plugin.
+
+* _ui_: The control that should be displayed on the change screen to
+  render the labels/approvals. Possible values are `DEFAULT` and
+  `USER_LABEL_TABLE`.
+
+SEE ALSO
+--------
+
+* [Account related REST endpoints](../../../Documentation/rest-api-accounts.html)
+
+GERRIT
+------
+Part of [Gerrit Code Review](../../../Documentation/index.html)