Add formatter for .docx, .pptx and .xlsx files

This allows to look at MS Office documents. Please note that this
formatter is not working for .doc, .ppt and .xls files.

Docx4J tries to load some resources dynamically. This fails if the
Gerrit core classloader is used since it doesn't see the resources
that are contained in the plugin jar. To make the resource loading
work the DocxFormatter must set a context classloader on the current
thread.

Change-Id: Iffe6bf4f469fc237cbb79d37926e80d61e337649
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/BUCK b/BUCK
index 25b0467..df1e8a6 100644
--- a/BUCK
+++ b/BUCK
@@ -2,11 +2,14 @@
 
 MODULE = 'com.googlesource.gerrit.plugins.xdocs.XDocs'
 
-ASCIIDOCTOR = '//lib/asciidoctor:asciidoc_lib' if STANDALONE_MODE \
-  else '//plugins/x-docs/lib/asciidoctor:asciidoc_lib'
-
-DAISYDIFF = '//lib/daisydiff:daisydiff_lib' if STANDALONE_MODE \
-  else '//plugins/x-docs/lib/daisydiff:daisydiff_lib'
+if STANDALONE_MODE:
+  ASCIIDOCTOR = '//lib/asciidoctor:asciidoc_lib'
+  DAISYDIFF = '//lib/daisydiff:daisydiff_lib'
+  DOCX4J = '//lib/docx4j:docx4j_lib'
+else:
+  ASCIIDOCTOR = '//plugins/x-docs/lib/asciidoctor:asciidoc_lib'
+  DAISYDIFF = '//plugins/x-docs/lib/daisydiff:daisydiff_lib'
+  DOCX4J = '//plugins/x-docs/lib/docx4j:docx4j_lib'
 
 gerrit_plugin(
   name = 'x-docs',
@@ -24,6 +27,7 @@
   deps = [
     ASCIIDOCTOR,
     DAISYDIFF,
+    DOCX4J,
   ],
 )
 
diff --git a/lib/antlr/BUCK b/lib/antlr/BUCK
new file mode 100644
index 0000000..f437234
--- /dev/null
+++ b/lib/antlr/BUCK
@@ -0,0 +1,38 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '3.2'
+
+java_library(
+  name = 'antlr_lib',
+  deps = [
+    ':antlr',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'antlr',
+  id = 'org.antlr:antlr:' + VERSION,
+  sha1 = '6b0acabea7bb3da058200a77178057e47e25cb69',
+  license = 'antlr',
+  deps = [
+    ':antlr-runtime',
+    ':stringtemplate',
+  ],
+)
+
+maven_jar(
+  name = 'antlr-runtime',
+  id = 'org.antlr:antlr-runtime:' + VERSION,
+  sha1 = '31c746001016c6226bd7356c9f87a6a084ce3715',
+  license = 'antlr',
+)
+
+maven_jar(
+  name = 'stringtemplate',
+  id = 'org.antlr:stringtemplate:' + VERSION,
+  sha1 = '6fe2e3bb57daebd1555494818909f9664376dd6c',
+  license = 'antlr',
+  attach_source = False,
+)
+
diff --git a/lib/avalon-framework/BUCK b/lib/avalon-framework/BUCK
new file mode 100644
index 0000000..467405e
--- /dev/null
+++ b/lib/avalon-framework/BUCK
@@ -0,0 +1,29 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '4.3.1'
+
+java_library(
+  name = 'avalon-framework_lib',
+  exported_deps = [
+    ':avalon-framework-api',
+    ':avalon-framework-impl',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'avalon-framework-api',
+  id = 'org.apache.avalon.framework:avalon-framework-api:' + VERSION,
+  sha1 = '2dacadeb49bc14420990b1f28897d46f96e2181d',
+  src_sha1 = '5c04230666be057c5a3ad1558575fc9a886fc1b6',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'avalon-framework-impl',
+  id = 'org.apache.avalon.framework:avalon-framework-impl:' + VERSION,
+  sha1 = '2d5f5a07fd14513ce6d7a7bfaff69419c26dbd0b',
+  src_sha1 = '09f779f9b35461a7767a54bc835d21bd2a97ad6e',
+  license = 'Apache2.0',
+)
+
diff --git a/lib/commons/BUCK b/lib/commons/BUCK
new file mode 100644
index 0000000..ba42a1f
--- /dev/null
+++ b/lib/commons/BUCK
@@ -0,0 +1,41 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+java_library(
+  name = 'commons_lib',
+  deps = [
+    ':codec',
+    ':io',
+    ':lang',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+EXCLUDE = [
+  'META-INF/LICENSE.txt',
+  'META-INF/NOTICE.txt'
+]
+
+maven_jar(
+  name = 'codec',
+  id = 'commons-codec:commons-codec:1.4',
+  sha1 = '4216af16d38465bbab0f3dff8efa14204f7a399a',
+  license = 'Apache2.0',
+  exclude = EXCLUDE,
+)
+
+maven_jar(
+  name = 'io',
+  id = 'commons-io:commons-io:1.4',
+  sha1 = 'a8762d07e76cfde2395257a5da47ba7c1dbd3dce',
+  license = 'Apache2.0',
+  exclude = EXCLUDE,
+)
+
+maven_jar(
+  name = 'lang',
+  id = 'commons-lang:commons-lang:2.5',
+  sha1 = 'b0236b252e86419eef20c31a44579d2aee2f0a69',
+  license = 'Apache2.0',
+  exclude = EXCLUDE,
+)
+
diff --git a/lib/docx4j/BUCK b/lib/docx4j/BUCK
new file mode 100644
index 0000000..b9c84bb
--- /dev/null
+++ b/lib/docx4j/BUCK
@@ -0,0 +1,90 @@
+include_defs('//bucklets/gerrit_plugin.bucklet')
+include_defs('//bucklets/maven_jar.bucklet')
+
+if STANDALONE_MODE:
+  ANTLR  = '//lib/antlr:antlr_lib'
+  AVALON_FRAMEWORK = '//lib/avalon-framework:avalon-framework_lib'
+  COMMONS = '//lib/commons:commons_lib'
+  POI = '//lib/poi:poi_lib'
+  PLUTEXT = '//lib/plutext:plutext_lib'
+  XALAN = '//lib/xalan:xalan_lib'
+  XMLGRAPHICS = '//lib/xmlgraphics:xmlgraphics_lib'
+else:
+  ANTLR = '//plugins/x-docs/lib/antlr:antlr_lib'
+  AVALON_FRAMEWORK = '//plugins/x-docs/lib/avalon-framework:avalon-framework_lib'
+  COMMONS = '//plugins/x-docs/lib/commons:commons_lib'
+  POI = '//plugins/x-docs/lib/poi:poi_lib'
+  PLUTEXT = '//plugins/x-docs/lib/plutext:plutext_lib'
+  XALAN = '//plugins/x-docs/lib/xalan:xalan_lib'
+  XMLGRAPHICS = '//plugins/x-docs/lib/xmlgraphics:xmlgraphics_lib'
+
+java_library(
+  name = 'docx4j_lib',
+  deps = [
+    ANTLR,
+    COMMONS,
+    ':guava',
+  ],
+  exported_deps = [
+    AVALON_FRAMEWORK,
+    POI,
+    PLUTEXT,
+    XALAN,
+    XMLGRAPHICS,
+    ':docx4j',
+    ':mbassador',
+    ':slf4j-api',
+    ':wmf2svg',
+    ':xml-apis',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'docx4j',
+  id = 'org.docx4j:docx4j:3.2.1',
+  sha1 = '35b2ef9f7eb12efe9708b986ecf6e86cfd77a162',
+  src_sha1 = '49702b88080bc22f6cfa58aadbf5422bcd904094',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'guava',
+  id = 'com.google.guava:guava:18.0',
+  sha1 = 'cce0823396aa693798f8882e64213b1772032b09',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'mbassador',
+  id = 'net.engio:mbassador:1.2.0',
+  sha1 = '7aa2c6f172cc8c59983c5255faa45a16a41e173b',
+  src_sha1 = 'd10cdaf71bfcb2002ab904a9d475e60c70c9b6bf',
+  license = 'mbassador',
+)
+
+maven_jar(
+  name = 'slf4j-api',
+  id = 'org.slf4j:slf4j-api:1.7.7',
+  sha1 = '2b8019b6249bb05d81d3a3094e468753e2b21311',
+  src_sha1 = '0acd62e31cc314266e73eebed0b6dd7ea974a0ed',
+  license = 'slf4j',
+)
+
+maven_jar(
+  name = 'wmf2svg',
+  id = 'net.arnx:wmf2svg:0.9.7',
+  sha1 = '88a871f85a0e765c960af88ccc5a9a0e00384cd8',
+  src_sha1 = '6948f9616032bd857c5173b204042889527a3bf3',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'xml-apis',
+  id = 'xml-apis:xml-apis:1.3.04',
+  sha1 = '90b215f48fe42776c8c7f6e3509ec54e84fd65ef',
+  src_sha1 = 'd89105ccbe3fd823865330fd964233baf2b53e88',
+  license = 'Apache2.0',
+)
+
diff --git a/lib/docx4j/LICENSE-mbassador b/lib/docx4j/LICENSE-mbassador
new file mode 100644
index 0000000..f8986b8
--- /dev/null
+++ b/lib/docx4j/LICENSE-mbassador
@@ -0,0 +1,13 @@
+MIT License
+
+Copyright (c) 2012 Benjamin Diedrichsen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/lib/docx4j/LICENSE-slf4j b/lib/docx4j/LICENSE-slf4j
new file mode 100644
index 0000000..ff563ee
--- /dev/null
+++ b/lib/docx4j/LICENSE-slf4j
@@ -0,0 +1,22 @@
+Copyright (c) 2004-2013 QOS.ch
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
diff --git a/lib/plutext/BUCK b/lib/plutext/BUCK
new file mode 100644
index 0000000..39da881
--- /dev/null
+++ b/lib/plutext/BUCK
@@ -0,0 +1,37 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '4.3.1'
+
+java_library(
+  name = 'plutext_lib',
+  exported_deps = [
+    ':jaxb-svg11',
+    ':jaxb-xmldsig-core',
+    ':jaxb-xslfo',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'jaxb-svg11',
+  id = 'org.plutext:jaxb-svg11:1.0.2',
+  sha1 = '3c0cd54d5691f5b5f8c60ed0c06353ff1db424e1',
+  src_sha1 = 'd2ecea2f14168d693bf68326ebea2ebfc6144114',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'jaxb-xmldsig-core',
+  id = 'org.plutext:jaxb-xmldsig-core:1.0.0',
+  sha1 = '57514aa2f72111cfbc0a532ce88782735370e1e5',
+  src_sha1 = 'a41559be6a94177daf0813f63d6ec81b11b3c0d3',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'jaxb-xslfo',
+  id = 'org.plutext:jaxb-xslfo:1.0.1',
+  sha1 = '85441209652b216f61160445b399f5bc97e370c6',
+  src_sha1 = 'b81e98b51687771f8a0b12406ea142a6e5dc6539',
+  license = 'Apache2.0',
+)
diff --git a/lib/poi/BUCK b/lib/poi/BUCK
new file mode 100644
index 0000000..1ce3b08
--- /dev/null
+++ b/lib/poi/BUCK
@@ -0,0 +1,29 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '3.10.1'
+
+java_library(
+  name = 'poi_lib',
+  exported_deps = [
+    ':poi',
+    ':poi-scratchpad',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'poi',
+  id = 'org.apache.poi:poi:' + VERSION,
+  sha1 = '95174823e13aa828cb715b542e647e56096ffcb2',
+  src_sha1 = 'dcbcab74270ee3f68da61ef13c6f0858fb532e52',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'poi-scratchpad',
+  id = 'org.apache.poi:poi-scratchpad:' + VERSION,
+  sha1 = 'f40da8984b7a9bdf81270d7ecd2639548361fccd',
+  src_sha1 = '88df5b9afa00070902f9bb100c554dba289afc7a',
+  license = 'Apache2.0',
+)
+
diff --git a/lib/xalan/BUCK b/lib/xalan/BUCK
new file mode 100644
index 0000000..0eaa213
--- /dev/null
+++ b/lib/xalan/BUCK
@@ -0,0 +1,29 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+VERSION = '2.7.2'
+
+java_library(
+  name = 'xalan_lib',
+  exported_deps = [
+    ':xalan',
+    ':serializer',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'xalan',
+  id = 'xalan:xalan:' + VERSION,
+  sha1 = 'd55d3f02a56ec4c25695fe67e1334ff8c2ecea23',
+  src_sha1 = 'fe9c3d37a49238fac9d4d6c4f5bbd8c334da787a',
+  license = 'Apache2.0',
+)
+
+maven_jar(
+  name = 'serializer',
+  id = 'xalan:serializer:' + VERSION,
+  sha1 = '24247f3bb052ee068971393bdb83e04512bb1c3c',
+  src_sha1 = 'fe9c3d37a49238fac9d4d6c4f5bbd8c334da787a',
+  license = 'Apache2.0',
+)
+
diff --git a/lib/xmlgraphics/BUCK b/lib/xmlgraphics/BUCK
new file mode 100644
index 0000000..b408e90
--- /dev/null
+++ b/lib/xmlgraphics/BUCK
@@ -0,0 +1,173 @@
+include_defs('//bucklets/maven_jar.bucklet')
+
+BATIK_VERSION = '1.7'
+
+java_library(
+  name = 'xmlgraphics_lib',
+  exported_deps = [
+    ':batik-anim',
+    ':batik-awt-util',
+    ':batik-bridge',
+    ':batik-css',
+    ':batik-dom',
+    ':batik-ext',
+    ':batik-extension',
+    ':batik-gvt',
+    ':batik-js',
+    ':batik-parser',
+    ':batik-script',
+    ':batik-svg-dom',
+    ':batik-svggen',
+    ':batik-transcoder',
+    ':batik-util',
+    ':batik-xml',
+    ':fop',
+    ':xmlgraphics-commons',
+  ],
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'batik-anim',
+  id = 'org.apache.xmlgraphics:batik-anim:' + BATIK_VERSION,
+  sha1 = 'a45dd2ff8e4ecd56a4fc64dc668b53bee90bf601',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-awt-util',
+  id = 'org.apache.xmlgraphics:batik-awt-util:' + BATIK_VERSION,
+  sha1 = '67605a29d49bf33f3c1d7832f490b0a007e7a6e2',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-bridge',
+  id = 'org.apache.xmlgraphics:batik-bridge:' + BATIK_VERSION,
+  sha1 = '8e0cde3830e0f17704cd392b0a09b13944987a51',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-css',
+  id = 'org.apache.xmlgraphics:batik-css:' + BATIK_VERSION,
+  sha1 = 'e6bb5c85753331534593f33fb9236acb41a0ab79',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-dom',
+  id = 'org.apache.xmlgraphics:batik-dom:' + BATIK_VERSION,
+  sha1 = '710d559bd1df52581b57b75a99ed5fd2e2918bb7',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-ext',
+  id = 'org.apache.xmlgraphics:batik-ext:' + BATIK_VERSION,
+  sha1 = '4784302b44a0336166fef6153a5e3d73e861aecc',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-extension',
+  id = 'org.apache.xmlgraphics:batik-extension:' + BATIK_VERSION,
+  sha1 = '8e810d9ce0499beca541e3b1a144557cf06f8b19',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-gvt',
+  id = 'org.apache.xmlgraphics:batik-gvt:' + BATIK_VERSION,
+  sha1 = '03d315e60d72c761c52946b4acaa4b86239ef938',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-js',
+  id = 'org.apache.xmlgraphics:batik-js:' + BATIK_VERSION,
+  sha1 = '688eb1bf13b7a54491fcb3405068fc5092589884',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-parser',
+  id = 'org.apache.xmlgraphics:batik-parser:' + BATIK_VERSION,
+  sha1 = '5d756cc4f6bf891793e6c7590773859c33a8609f',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-script',
+  id = 'org.apache.xmlgraphics:batik-script:' + BATIK_VERSION,
+  sha1 = '4ea7906724bfefc1fca3e5b28229a458523e1fbf',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-svg-dom',
+  id = 'org.apache.xmlgraphics:batik-svg-dom:' + BATIK_VERSION,
+  sha1 = '5b3b1fea480fabbd3e0c44540af25b9fda0587ae',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-svggen',
+  id = 'org.apache.xmlgraphics:batik-svggen:' + BATIK_VERSION,
+  sha1 = 'baa58d0f5bfd2a28142e222cee126eb71bd0a938',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-transcoder',
+  id = 'org.apache.xmlgraphics:batik-transcoder:' + BATIK_VERSION,
+  sha1 = 'aa2eb6300cb50bbb9dbf52daf7d625aa0df1d930',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-util',
+  id = 'org.apache.xmlgraphics:batik-util:' + BATIK_VERSION,
+  sha1 = '5c4dd0dd9a86a2fba2c6ea26fb62b32b21b2a61e',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'batik-xml',
+  id = 'org.apache.xmlgraphics:batik-xml:' + BATIK_VERSION,
+  sha1 = '17e3da8bd9d4a131350a7835f5cc0d93ba199c89',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'fop',
+  id = 'org.apache.xmlgraphics:fop:1.1',
+  sha1 = '95978100a6cde324078947a2d476cf2f207a7e5a',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
+maven_jar(
+  name = 'xmlgraphics-commons',
+  id = 'org.apache.xmlgraphics:xmlgraphics-commons:1.5',
+  sha1 = '7fb5c2b2c18f0e87fbe9bded16429a5d7cc2dc2b',
+  license = 'Apache2.0',
+  attach_source = False,
+)
+
diff --git a/pom.xml b/pom.xml
index 7a08bdf..bfb6513 100644
--- a/pom.xml
+++ b/pom.xml
@@ -125,16 +125,221 @@
       <version>2.6.1</version>
       <scope>provided</scope>
     </dependency>
+
     <dependency>
       <groupId>org.asciidoctor</groupId>
       <artifactId>asciidoctorj</artifactId>
       <version>1.5.1</version>
     </dependency>
+
     <dependency>
       <groupId>org.outerj.daisy</groupId>
       <artifactId>daisydiff</artifactId>
       <version>1.1</version>
     </dependency>
+
+    <dependency>
+      <groupId>org.docx4j</groupId>
+      <artifactId>docx4j</artifactId>
+      <version>3.2.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.antlr</groupId>
+      <artifactId>antlr</artifactId>
+      <version>3.2</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.antlr</groupId>
+      <artifactId>antlr-runtime</artifactId>
+      <version>3.2</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.antlr</groupId>
+      <artifactId>stringtemplate</artifactId>
+      <version>3.2</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.avalon.framework</groupId>
+      <artifactId>avalon-framework-api</artifactId>
+      <version>4.3.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.avalon.framework</groupId>
+      <artifactId>avalon-framework-impl</artifactId>
+      <version>4.3.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-anim</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-awt-util</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-bridge</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-css</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-dom</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-ext</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-extension</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-gvt</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-js</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-parser</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-script</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-svg-dom</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-svggen</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-transcoder</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-util</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-xml</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>fop</artifactId>
+      <version>1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>xmlgraphics-commons</artifactId>
+      <version>1.5</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.poi</groupId>
+      <artifactId>poi</artifactId>
+      <version>3.10.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.poi</groupId>
+      <artifactId>poi-scratchpad</artifactId>
+      <version>3.10.1</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-codec</groupId>
+      <artifactId>commons-codec</artifactId>
+      <version>1.4</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>1.4</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>commons-lang</groupId>
+      <artifactId>commons-lang</artifactId>
+      <version>2.5</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>18.0</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.plutext</groupId>
+      <artifactId>jaxb-svg11</artifactId>
+      <version>1.0.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.plutext</groupId>
+      <artifactId>jaxb-xmldsig-core</artifactId>
+      <version>1.0.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.plutext</groupId>
+      <artifactId>jaxb-xslfo</artifactId>
+      <version>1.0.1</version>
+    </dependency>
+    <dependency>
+      <groupId>net.engio</groupId>
+      <artifactId>mbassador</artifactId>
+      <version>1.2.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.7</version>
+    </dependency>
+    <dependency>
+      <groupId>net.arnx</groupId>
+      <artifactId>wmf2svg</artifactId>
+      <version>0.9.7</version>
+    </dependency>
+    <dependency>
+      <groupId>xalan</groupId>
+      <artifactId>xalan</artifactId>
+      <version>2.7.2</version>
+    </dependency>
+    <dependency>
+      <groupId>xalan</groupId>
+      <artifactId>serializer</artifactId>
+      <version>2.7.2</version>
+    </dependency>
+    <dependency>
+      <groupId>xml-apis</groupId>
+      <artifactId>xml-apis</artifactId>
+      <version>1.3.04</version>
+    </dependency>
   </dependencies>
 
   <repositories>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/Module.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/Module.java
index d822faf..a526560 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/Module.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/Module.java
@@ -28,6 +28,7 @@
 import com.google.inject.Inject;
 
 import com.googlesource.gerrit.plugins.xdocs.formatter.AsciidoctorFormatter;
+import com.googlesource.gerrit.plugins.xdocs.formatter.DocxFormatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.Formatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.MarkdownFormatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.PlainTextFormatter;
@@ -53,6 +54,9 @@
         .annotatedWith(Exports.named(AsciidoctorFormatter.NAME))
         .to(AsciidoctorFormatter.class);
     bind(Formatter.class)
+        .annotatedWith(Exports.named(DocxFormatter.NAME))
+        .to(DocxFormatter.class);
+    bind(Formatter.class)
         .annotatedWith(Exports.named(MarkdownFormatter.NAME))
         .to(MarkdownFormatter.class);
     bind(Formatter.class)
diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocGlobalConfig.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocGlobalConfig.java
index 1f86e69..41e3a67 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocGlobalConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocGlobalConfig.java
@@ -15,6 +15,7 @@
 package com.googlesource.gerrit.plugins.xdocs;
 
 import com.googlesource.gerrit.plugins.xdocs.formatter.AsciidoctorFormatter;
+import com.googlesource.gerrit.plugins.xdocs.formatter.DocxFormatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.MarkdownFormatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.PlainTextFormatter;
 import com.googlesource.gerrit.plugins.xdocs.formatter.ZipFormatter;
@@ -48,6 +49,8 @@
 
   static void initialize(Config cfg) {
     cfg.setString(SECTION_FORMATTER, AsciidoctorFormatter.NAME, KEY_EXT, "adoc");
+    cfg.setStringList(SECTION_FORMATTER, DocxFormatter.NAME, KEY_EXT,
+        Arrays.asList("docx", "pptx", "xlsx"));
     cfg.setString(SECTION_FORMATTER, MarkdownFormatter.NAME, KEY_MIME_TYPE,
         "text/x-markdown");
     cfg.setString(SECTION_FORMATTER, PlainTextFormatter.NAME, KEY_MIME_TYPE,
diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/formatter/DocxFormatter.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/formatter/DocxFormatter.java
new file mode 100644
index 0000000..f9eb83a
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/formatter/DocxFormatter.java
@@ -0,0 +1,68 @@
+// 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.googlesource.gerrit.plugins.xdocs.formatter;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.inject.Inject;
+
+import com.googlesource.gerrit.plugins.xdocs.ConfigSection;
+
+import org.docx4j.Docx4J;
+import org.docx4j.Docx4jProperties;
+import org.docx4j.convert.out.HTMLSettings;
+import org.docx4j.openpackaging.exceptions.Docx4JException;
+import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class DocxFormatter implements StreamFormatter {
+  public static final String NAME = "DOCX";
+
+  private final FormatterUtil util;
+
+  @Inject
+  DocxFormatter(FormatterUtil formatterUtil) {
+    this.util = formatterUtil;
+  }
+
+  @Override
+  public String format(String projectName, String revision, ConfigSection cfg,
+      InputStream raw) throws IOException {
+    // Docx4J tries to load some resources dynamically. This fails if the Gerrit
+    // core classloader is used since it doesn't see the resources that are
+    // contained in the plugin jar. To make the resource loading work we
+    // must set a context classloader on the current thread.
+    ClassLoader loader = Thread.currentThread().getContextClassLoader();
+    try {
+      Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+      WordprocessingMLPackage p = Docx4J.load(raw);
+      HTMLSettings htmlSettings = Docx4J.createHTMLSettings();
+      htmlSettings.setWmlPackage(p);
+      Docx4jProperties.setProperty("docx4j.Convert.Out.HTML.OutputMethodXML", true);
+      try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
+        Docx4J.toHTML(htmlSettings, out, Docx4J.FLAG_EXPORT_PREFER_XSL);
+        String html = out.toString(UTF_8.name());
+        return util.applyCss(html, NAME, projectName);
+      }
+    } catch (Docx4JException e) {
+      throw new IOException(e);
+    } finally {
+      Thread.currentThread().setContextClassLoader(loader);
+    }
+  }
+}
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
index 7477b6e..5039d46 100644
--- a/src/main/resources/Documentation/about.md
+++ b/src/main/resources/Documentation/about.md
@@ -67,6 +67,15 @@
     </td>
   </tr>
   <tr>
+    <td><tt>DocxFormatter</tt></td>
+    <td><tt>DOCX</tt></td>
+    <td>Formatter for <tt>.docx</tt>, <tt>.pptx</tt> and <tt>.xlsx</tt> files.</td>
+    <td><a href="../../../Documentation/licenses.html#Apache2_0">Apache2.0</a><br/></td>
+    <td>
+      <a href="http://www.docx4java.org/trac/docx4j">http://www.docx4java.org/trac/docx4j</a></br>
+    </td>
+  </tr>
+  <tr>
     <td><tt>MarkdownFormatter</tt></td>
     <td><tt>MARKDOWN</tt></td>
     <td>Formatter for documentation that is written in
diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 2b12b55..5184c96 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -96,7 +96,8 @@
 	Overrides the [global configuration of `inheritCss`](#formatterInheritCss)
 	for this formatter.
 
-	Supported for the following formatters: `ASCIIDOCTOR`, `MARKDOWN`, `ZIP`
+	Supported for the following formatters: `ASCIIDOCTOR`, `DOCX`,
+	`MARKDOWN`, `ZIP`
 
 	Default: `true` (CSS is inherited)
 
@@ -111,7 +112,8 @@
 	Overrides the [global configuration of `cssTheme`](#formatterCssTheme)
 	for this formatter.
 
-	Supported for the following formatters: `ASCIIDOCTOR`, `MARKDOWN`, `ZIP`
+	Supported for the following formatters: `ASCIIDOCTOR`, `DOCX`,
+	`MARKDOWN`, `ZIP`
 
 	By default not set.
 
@@ -136,6 +138,7 @@
 provided in the `refs/meta/config` branch of the project:
 
 * `ASCIIDOCTOR`: `@PLUGIN@/asciidoctor.css`
+* `DOCX`: `@PLUGIN@/docx.css`
 * `MARKDOWN`: `@PLUGIN@/markdown.css`
 * `ZIP`: `@PLUGIN@/zip.css`
 
@@ -155,6 +158,10 @@
 ```
   [formatter "ASCIIDOCTOR"]
     ext = adoc
+  [formatter "DOCX"]
+    ext = docx
+    ext = pptx
+    ext = xlsx
   [formatter "MARKDOWN"]
     mimeType = text/x-markdown
   [formatter "PLAIN_TEXT"]
@@ -168,6 +175,7 @@
 Supported formatters:
 
 * `ASCIIDOCTOR`
+* `DOCX`
 * `MARKDOWN`
 * `PLAIN_TEXT`
 * `ZIP`
@@ -249,7 +257,8 @@
 
 	Can be overridden on [project-level](#inheritCss).
 
-	Supported for the following formatters: `ASCIIDOCTOR`, `MARKDOWN`, `ZIP`
+	Supported for the following formatters: `ASCIIDOCTOR`, `DOCX`,
+	`MARKDOWN`, `ZIP`
 
 	Default: `true` (CSS is inherited)
 
@@ -262,7 +271,8 @@
 
 	Can be overridden on [project-level](#cssTheme).
 
-	Supported for the following formatters: `ASCIIDOCTOR`, `MARKDOWN`, `ZIP`
+	Supported for the following formatters: `ASCIIDOCTOR`, `DOCX`,
+	`MARKDOWN`, `ZIP`
 
 	By default not set.
 
@@ -300,5 +310,6 @@
 providing CSS files in `<review-site>/data/@PLUGIN@/css/`:
 
 * `ASCIIDOCTOR`: `asciidoctor.css`
+* `DOCX`: `docx.css`
 * `MARKDOWN`: `markdown.css`
 * `ZIP`: `zip.css`
diff --git a/src/main/resources/com/googlesource/gerrit/plugins/xdocs/formatter/docx.css b/src/main/resources/com/googlesource/gerrit/plugins/xdocs/formatter/docx.css
new file mode 100644
index 0000000..f657db5
--- /dev/null
+++ b/src/main/resources/com/googlesource/gerrit/plugins/xdocs/formatter/docx.css
@@ -0,0 +1,38 @@
+/* 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.
+ */
+
+html,
+body,
+div,
+span,
+h1, h2, h3, h4, h5, h6,
+p,
+a,
+img,
+ol, ul, li,
+table,
+caption,
+tbody,
+tfoot,
+thead,
+tr, th, td {
+  margin: 0;
+  padding: 0;
+  border: 0;
+}
+
+body {
+  line-height: 1;
+}