First commit

8 files changed, 3031 insertions, 0 deletions

diff --git a/COPYING b/COPYING
new file mode 100644
index 000000000000..94a9ed024d38
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/README b/README
new file mode 100644
index 000000000000..a0340f3e886d
--- /dev/null
+++ b/README
@@ -0,0 +1,12 @@
+Emacs X Window Manager
+======================
+
+EXWM (Emacs X Window Manager) turns Emacs into a full-featured tiling X window
+manager. Please refer to "exwm.el" for more details.
+
+EXWM is built on top of XELB and its utility libraris:
+  + XELB: https://github.com/ch11ng/xelb
+  + XELB utilility libraries: https://github.com/ch11ng/xelb-util
+
+You may also be intrested in an input method server designed for EXWM:
+  + EXIM: https://github.com/ch11ng/exim
diff --git a/exwm-floating.el b/exwm-floating.el
new file mode 100644
index 000000000000..9e57c5ca7da9
--- /dev/null
+++ b/exwm-floating.el
@@ -0,0 +1,431 @@
+;;; exwm-floating.el --- Floating Module for EXWM  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This module deals with the conversion between floating and non-floating
+;; states and implements moving/resizing operations on floating windows.
+
+;; Todo:
+;; + move/resize with keyboard.
+
+;;; Code:
+
+(require 'xcb-cursor)
+
+(defvar exwm-floating-border-width 1 "Border width of the floating window.")
+(defvar exwm-floating-border-color "blue"
+  "Border color of the floating window.")
+
+(defun exwm-floating--set-floating (id)
+  "Make window ID floating."
+  (interactive)
+  (setq exwm-input--focus-lock t)
+  (when (get-buffer-window (exwm--id->buffer id)) ;window in non-floating state
+    (set-window-buffer (selected-window) (other-buffer))) ;hide it first
+  (let* ((original-frame
+          (with-current-buffer (exwm--id->buffer id)
+            (if (and exwm-transient-for (exwm--id->buffer exwm-transient-for))
+                ;; Place a modal in the same workspace with its leading window
+                (with-current-buffer (exwm--id->buffer exwm-transient-for)
+                  exwm--frame)
+              ;; Fallback to current workspace
+              exwm-workspace--current)))
+         (original-id (frame-parameter original-frame 'exwm-window-id))
+         ;; Create new frame
+         (frame (with-current-buffer "*scratch*"
+                  (make-frame `((minibuffer . nil) ;use the one on workspace
+                                (background-color
+                                 . ,exwm-floating-border-color)
+                                (internal-border-width
+                                 . ,exwm-floating-border-width)
+                                (unsplittable . t))))) ;and fix the size later
+         (frame-id (string-to-int (frame-parameter frame 'window-id)))
+         (outer-id (string-to-int (frame-parameter frame 'outer-window-id)))
+         (window (frame-first-window frame)) ;and it's the only window
+         (x (slot-value exwm--geometry 'x))
+         (y (slot-value exwm--geometry 'y))
+         (width (slot-value exwm--geometry 'width))
+         (height (slot-value exwm--geometry 'height)))
+    ;; Save window IDs
+    (set-frame-parameter frame 'exwm-window-id frame-id)
+    (set-frame-parameter frame 'exwm-outer-id outer-id)
+    ;; Set urgency flag if it's not appear in the active workspace
+    (let ((idx (cl-position original-frame exwm-workspace--list)))
+      (when (/= idx exwm-workspace-current-index)
+        (set-frame-parameter original-frame 'exwm--urgency t)
+        (exwm-workspace--update-switch-history)))
+    ;; Fix illegal parameters
+    ;; FIXME: check normal hints restrictions
+    (let* ((display-width (x-display-pixel-width))
+           (display-height (- (x-display-pixel-height)
+                              (window-pixel-height (minibuffer-window
+                                                    original-frame))
+                              (* 2 (window-mode-line-height))
+                              (window-header-line-height window)
+                              (* 2 exwm-floating-border-width)))
+           (display-height (* 2 (/ display-height 2)))) ;round to even
+      (if (> width display-width)
+          ;; Too wide
+          (progn (setq x 0
+                       width display-width))
+        ;; Invalid width
+        (when (= 0 width) (setq width (/ display-width 2)))
+        ;; Completely outsize
+        (when (or (> x display-width) (> 0 (+ x display-width)))
+          (setq x (/ (- display-width width) 2))))
+      (if (> height display-height)
+          ;; Too tall
+          (setq y 0
+                height display-height)
+        ;; Invalid height
+        (when (= 0 height) (setq height (/ display-height 2)))
+        ;; Completely outside
+        (when (or (> y display-height) (> 0 (+ y display-height)))
+          (setq y (/ (- display-height height) 2)))))
+    ;; Set OverrideRedirect on this frame
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window outer-id :value-mask xcb:CW:OverrideRedirect
+                       :override-redirect 1))
+    ;; Set event mask
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window frame-id :value-mask xcb:CW:EventMask
+                       :event-mask xcb:EventMask:SubstructureRedirect))
+    ;; Reparent this frame to the original one
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ReparentWindow
+                       :window outer-id :parent original-id
+                       :x (- x exwm-floating-border-width)
+                       :y (- y exwm-floating-border-width)))
+    ;; Save the geometry
+    ;; Rationale: the frame will not be ready for some time, thus we cannot
+    ;;            infer the correct window size from its geometry.
+    (with-current-buffer (exwm--id->buffer id)
+      (setq exwm--floating-edges
+            (vector exwm-floating-border-width exwm-floating-border-width
+                    (+ width exwm-floating-border-width)
+                    (+ height exwm-floating-border-width))))
+    ;; Fit frame to client
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ConfigureWindow
+                       :window outer-id
+                       :value-mask (logior xcb:ConfigWindow:Width
+                                           xcb:ConfigWindow:Height
+                                           xcb:ConfigWindow:StackMode)
+                       :width (+ width (* 2 exwm-floating-border-width))
+                       :height (+ height (* 2 exwm-floating-border-width)
+                                  (window-mode-line-height)
+                                  (window-header-line-height))
+                       :stack-mode xcb:StackMode:Above)) ;top-most
+    ;; Reparent window to this frame
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask xcb:EventMask:NoEvent))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ReparentWindow
+                       :window id :parent frame-id
+                       :x exwm-floating-border-width
+                       :y exwm-floating-border-width))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask exwm--client-event-mask))
+    (xcb:flush exwm--connection)
+    ;; Set window/buffer
+    (with-current-buffer (exwm--id->buffer id)
+      (setq window-size-fixed t         ;make frame fixed size
+            exwm--frame original-frame
+            exwm--floating-frame frame)
+      (set-window-buffer window (current-buffer)) ;this changes current buffer
+      (set-window-dedicated-p window t))
+    (with-current-buffer (exwm--id->buffer id)
+      ;; Some window should not get input focus on creation
+      ;; FIXME: other conditions?
+      (unless (memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY exwm-window-type)
+        (x-focus-frame exwm--floating-frame)
+        (exwm-input--set-focus id)))
+    (setq exwm-input--focus-lock nil)))
+
+(defun exwm-floating--unset-floating (id)
+  "Make window ID non-floating."
+  (interactive)
+  (setq exwm-input--focus-lock t)
+  (let ((buffer (exwm--id->buffer id)))
+    ;; Reparent to workspace frame
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask xcb:EventMask:NoEvent))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ReparentWindow
+                       :window id
+                       :parent (frame-parameter exwm-workspace--current
+                                                'exwm-window-id)
+                       :x 0 :y 0))      ;temporary position
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask exwm--client-event-mask))
+    (xcb:flush exwm--connection)
+    (with-current-buffer buffer
+      (when exwm--floating-frame        ;from floating to non-floating
+        (setq exwm--floating-edges nil) ;invalid by now
+        (set-window-dedicated-p (frame-first-window exwm--floating-frame) nil)
+        (delete-frame exwm--floating-frame))) ;remove the floating frame
+    (with-current-buffer buffer
+      (setq exwm--floating-frame nil
+            exwm--frame exwm-workspace--current))
+    (select-frame exwm-workspace--current t)
+    (set-window-buffer nil buffer)
+    (exwm-layout--show id)
+    (exwm-input--set-focus id))
+  (setq exwm-input--focus-lock nil))
+
+(defun exwm-floating-toggle-floating ()
+  "Toggle the current window between floating and non-floating states."
+  (interactive)
+  (with-current-buffer (window-buffer)
+    (if exwm--floating-frame
+        (exwm-floating--unset-floating exwm--id)
+      (exwm-floating--set-floating exwm--id))))
+
+(defvar exwm-floating--moveresize-id nil)
+(defvar exwm-floating--moveresize-type nil)
+(defvar exwm-floating--moveresize-delta nil)
+
+(defun exwm-floating--start-moveresize (id &optional type)
+  "Start move/resize."
+  (let ((buffer (exwm--id->buffer id))
+        frame frame-id cursor)
+    (when (and buffer
+               (setq frame (with-current-buffer buffer exwm--floating-frame))
+               (setq frame-id (frame-parameter frame 'exwm-outer-id))
+               ;; Test if the pointer can be grabbed
+               (= xcb:GrabStatus:Success
+                  (slot-value
+                   (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:GrabPointer
+                                      :owner-events 0 :grab-window frame-id
+                                      :event-mask xcb:EventMask:NoEvent
+                                      :pointer-mode xcb:GrabMode:Async
+                                      :keyboard-mode xcb:GrabMode:Async
+                                      :confine-to xcb:Window:None
+                                      :cursor xcb:Cursor:None
+                                      :time xcb:Time:CurrentTime))
+                   'status)))
+      (setq exwm--floating-edges nil)   ;invalid by now
+      (with-slots (root-x root-y win-x win-y)
+          (xcb:+request-unchecked+reply exwm--connection
+              (make-instance 'xcb:QueryPointer :window id))
+        (select-frame-set-input-focus frame) ;raise and focus it
+        (setq width (frame-pixel-width frame)
+              height (frame-pixel-height frame))
+        (unless type
+          ;; Determine the resize type according to the pointer position
+          ;; Clicking the center 1/3 part to resize has not effect
+          (setq x (/ (* 3 win-x) (float width))
+                y (/ (* 3 win-y) (float height))
+                type (cond ((and (< x 1) (< y 1))
+                            xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPLEFT)
+                           ((and (> x 2) (< y 1))
+                            xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPRIGHT)
+                           ((and (> x 2) (> y 2))
+                            xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT)
+                           ((and (< x 1) (> y 2))
+                            xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT)
+                           ((< y 1) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP)
+                           ((> x 2) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_RIGHT)
+                           ((> y 2) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOM)
+                           ((< x 1) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_LEFT))))
+        (when type
+          (cond ((= type xcb:ewmh:_NET_WM_MOVERESIZE_MOVE)
+                 (setq exwm-floating--moveresize-delta (list win-x win-y 0 0)
+                       cursor exwm-floating--cursor-move))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPLEFT)
+                 (setq exwm-floating--moveresize-delta
+                       (list win-x win-y (+ root-x width) (+ root-y height))
+                       cursor exwm-floating--cursor-top-left))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP)
+                 (setq exwm-floating--moveresize-delta
+                       (list 0 win-y 0 (+ root-y height))
+                       cursor exwm-floating--cursor-top))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPRIGHT)
+                 (setq exwm-floating--moveresize-delta
+                       (list 0 win-y (- root-x width) (+ root-y height))
+                       cursor exwm-floating--cursor-top-right))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_RIGHT)
+                 (setq exwm-floating--moveresize-delta
+                       (list 0 0 (- root-x width) 0)
+                       cursor exwm-floating--cursor-right))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT)
+                 (setq exwm-floating--moveresize-delta
+                       (list 0 0 (- root-x width) (- root-y height))
+                       cursor exwm-floating--cursor-bottom-right))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOM)
+                 (setq exwm-floating--moveresize-delta
+                       (list 0 0 0 (- root-y height))
+                       cursor exwm-floating--cursor-bottom))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT)
+                 (setq exwm-floating--moveresize-delta
+                       (list win-x 0 (+ root-x width) (- root-y height))
+                       cursor exwm-floating--cursor-bottom-left))
+                ((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_LEFT)
+                 (setq exwm-floating--moveresize-delta
+                       (list win-x 0 (+ root-x width) 0)
+                       cursor exwm-floating--cursor-left)))
+          ;; Select events and change cursor (should always succeed)
+          (xcb:+request-unchecked+reply exwm--connection
+              (make-instance 'xcb:GrabPointer
+                             :owner-events 0 :grab-window frame-id
+                             :event-mask (logior xcb:EventMask:ButtonRelease
+                                                 xcb:EventMask:ButtonMotion)
+                             :pointer-mode xcb:GrabMode:Async
+                             :keyboard-mode xcb:GrabMode:Async
+                             :confine-to xcb:Window:None
+                             :cursor cursor
+                             :time xcb:Time:CurrentTime))
+          (setq exwm-floating--moveresize-id frame-id
+                exwm-floating--moveresize-type type))))))
+
+(defun exwm-floating--stop-moveresize (&rest args)
+  "Stop move/resize."
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:UngrabPointer :time xcb:Time:CurrentTime))
+  (xcb:flush exwm--connection)
+  (setq exwm-floating--moveresize-id nil
+        exwm-floating--moveresize-type nil
+        exwm-floating--moveresize-delta nil))
+
+(defun exwm-floating--do-moveresize (data synthetic)
+  "Perform move/resize."
+  (let ((mask 0) (x 0) (y 0) (width 0) (height 0)
+        (delta exwm-floating--moveresize-delta)
+        obj root-x root-y)
+    (when (and exwm-floating--moveresize-id exwm-floating--moveresize-type)
+      (setq obj (make-instance 'xcb:MotionNotify))
+      (xcb:unmarshal obj data)
+      (setq root-x (slot-value obj 'root-x)
+            root-y (slot-value obj 'root-y))
+      ;; Perform move/resize according to the previously set type
+      (cond ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_MOVE)
+             (setq mask (logior xcb:ConfigWindow:X xcb:ConfigWindow:Y)
+                   x (- root-x (elt delta 0))
+                   y (- root-y (elt delta 1))))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPLEFT)
+             (setq mask
+                   (logior xcb:ConfigWindow:X xcb:ConfigWindow:Y
+                           xcb:ConfigWindow:Width xcb:ConfigWindow:Height)
+                   x (- root-x (elt delta 0))
+                   y (- root-y (elt delta 1))
+                   width (- (elt delta 2) root-x)
+                   height (- (elt delta 3) root-y)))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP)
+             (setq mask (logior xcb:ConfigWindow:Y xcb:ConfigWindow:Height)
+                   y (- root-y (elt delta 1))
+                   height (- (elt delta 3) root-y)))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPRIGHT)
+             (setq mask
+                   (logior xcb:ConfigWindow:Y
+                           xcb:ConfigWindow:Width xcb:ConfigWindow:Height)
+                   y (- root-y (elt delta 1))
+                   width (- root-x (elt delta 2))
+                   height (- (elt delta 3) root-y)))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_RIGHT)
+             (setq mask (logior xcb:ConfigWindow:Width)
+                   width (- root-x (elt delta 2))))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT)
+             (setq mask
+                   (logior xcb:ConfigWindow:Width xcb:ConfigWindow:Height)
+                   width (- root-x (elt delta 2))
+                   height (- root-y (elt delta 3))))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOM)
+             (setq mask (logior xcb:ConfigWindow:Height)
+                   height (- root-y (elt delta 3))))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT)
+             (setq mask
+                   (logior xcb:ConfigWindow:X
+                           xcb:ConfigWindow:Width xcb:ConfigWindow:Height)
+                   x (- root-x (elt delta 0))
+                   width (- (elt delta 2) root-x)
+                   height (- root-y (elt delta 3))))
+            ((= exwm-floating--moveresize-type
+                xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_LEFT)
+             (setq mask
+                   (logior xcb:ConfigWindow:X xcb:ConfigWindow:Width)
+                   x (- root-x (elt delta 0))
+                   width (- (elt delta 2) root-x))))
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ConfigureWindow
+                         :window exwm-floating--moveresize-id :value-mask mask
+                         :x x :y y :width width :height height))
+      (xcb:flush exwm--connection))))
+
+;; Cursors for moving/resizing a window
+(defvar exwm-floating--cursor-move nil)
+(defvar exwm-floating--cursor-top-left nil)
+(defvar exwm-floating--cursor-top nil)
+(defvar exwm-floating--cursor-top-right nil)
+(defvar exwm-floating--cursor-right nil)
+(defvar exwm-floating--cursor-bottom-right nil)
+(defvar exwm-floating--cursor-bottom nil)
+(defvar exwm-floating--cursor-bottom-left nil)
+(defvar exwm-floating--cursor-left nil)
+
+(defun exwm-floating--init ()
+  "Initialize floating module."
+  ;; Initialize cursors for moving/resizing a window
+  (xcb:cursor:init exwm--connection)
+  (setq exwm-floating--cursor-move
+        (xcb:cursor:load-cursor exwm--connection "fleur")
+        exwm-floating--cursor-top-left
+        (xcb:cursor:load-cursor exwm--connection "top_left_corner")
+        exwm-floating--cursor-top
+        (xcb:cursor:load-cursor exwm--connection "top_side")
+        exwm-floating--cursor-top-right
+        (xcb:cursor:load-cursor exwm--connection "top_right_corner")
+        exwm-floating--cursor-right
+        (xcb:cursor:load-cursor exwm--connection "right_side")
+        exwm-floating--cursor-bottom-right
+        (xcb:cursor:load-cursor exwm--connection "bottom_right_corner")
+        exwm-floating--cursor-bottom
+        (xcb:cursor:load-cursor exwm--connection "bottom_side")
+        exwm-floating--cursor-bottom-left
+        (xcb:cursor:load-cursor exwm--connection "bottom_left_corner")
+        exwm-floating--cursor-left
+        (xcb:cursor:load-cursor exwm--connection "left_side")))
+
+
+
+(provide 'exwm-floating)
+
+;;; exwm-floating.el ends here
diff --git a/exwm-input.el b/exwm-input.el
new file mode 100644
index 000000000000..107df0599ef5
--- /dev/null
+++ b/exwm-input.el
@@ -0,0 +1,451 @@
+;;; exwm-input.el --- Input Module for EXWM  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This module deals with key/mouse matters, including:
+;; + Input focus,
+;; + Key/Button event handling,
+;; + Key events filtering and simulation.
+
+;; Todo:
+;; + Pointer simulation mode (e.g. 'C-c 1'/'C-c 2' for single/double click,
+;;   move with arrow keys).
+;; + Demonstrate how to add a local key binding (add global prefix key and
+;;   modify `exwm-mode-map').
+;; + Simulation keys to mimic Emacs key bindings for text edit (redo, select,
+;;   cancel, clear, etc). Some of them are not present on common keyboard
+;;   (keycode = 0). May need to use XKB extension.
+
+;;; Code:
+
+(require 'xcb-keysyms)
+(require 'exwm-floating)
+
+(defvar exwm-input-move-event 's-down-mouse-1
+  "Emacs event to start moving a window.")
+(defvar exwm-input-resize-event 's-down-mouse-3
+  "Emacs event to start resizing a window.")
+
+(defvar exwm-input--move-keysym nil)
+(defvar exwm-input--move-mask nil)
+(defvar exwm-input--resize-keysym nil)
+(defvar exwm-input--resize-mask nil)
+
+(defvar exwm-input--timestamp xcb:Time:CurrentTime
+  "A recent timestamp received from X server.
+
+It's updated in several occasions, and only used by `exwm-input--set-focus'.")
+
+(defun exwm-input--set-focus (id)
+  "Set input focus to window ID in a proper way."
+  (exwm--with-current-id id
+    (setq exwm-input--focus-id id)
+    (if (and (not exwm--hints-input)
+             (memq xcb:Atom:WM_TAKE_FOCUS exwm--protocols))
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:icccm:SendEvent
+                           :destination id
+                           :event (xcb:marshal
+                                   (make-instance 'xcb:icccm:WM_TAKE_FOCUS
+                                                  :window id
+                                                  :time exwm-input--timestamp)
+                                   exwm--connection)))
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:SetInputFocus
+                         :revert-to xcb:InputFocus:Parent :focus id
+                         :time xcb:Time:CurrentTime)))
+    (xcb:flush exwm--connection)))
+
+(defvar exwm-input--focus-id xcb:Window:None
+  "The window that is theoretically focused.")
+(defvar exwm-input--focus-lock nil
+  "Non-nil when input focus should stay unchanged.")
+
+(defun exwm-input--update-focus ()
+  "Update input focus."
+  (unless exwm-input--focus-lock
+    (setq exwm-input--focus-lock t)
+    (when (eq (current-buffer) (window-buffer)) ;e.g. with-temp-buffer
+      (if (eq major-mode 'exwm-mode)
+          (progn (setq exwm-input--focus-id exwm--id)
+                 (when exwm--floating-frame
+                   (if (eq (selected-frame) exwm--floating-frame)
+                       ;; Cancel the possible input focus redirection
+                       (redirect-frame-focus exwm--floating-frame nil)
+                     ;; Focus the floating frame
+                     (x-focus-frame exwm--floating-frame)))
+                 ;; Finally focus the window
+                 (exwm-input--set-focus exwm-input--focus-id))
+        (exwm--with-current-id exwm-input--focus-id
+          (setq exwm-input--focus-id xcb:Window:None)
+          (let ((frame (selected-frame)))
+            (if exwm--floating-frame
+                (unless (or (eq frame exwm--floating-frame)
+                            (active-minibuffer-window))
+                  ;; Redirect input focus to the workspace frame
+                  (redirect-frame-focus exwm--floating-frame frame))
+              ;; Focus the workspace frame
+              (x-focus-frame frame))))))
+    (setq exwm-input--focus-lock nil)))
+
+(defun exwm-input--finish-key-sequence ()
+  "Mark the end of a key sequence (with the aid of `pre-command-hook')."
+  (setq exwm-input--during-key-sequence nil)
+  (when exwm-input--temp-line-mode
+    (setq exwm-input--temp-line-mode nil)
+    (exwm-input--release-keyboard)))
+
+(defun exwm-input--on-MappingNotify (data synthetic)
+  "Handle MappingNotify event."
+  (let ((obj (make-instance 'xcb:MappingNotify)))
+    (xcb:unmarshal obj data)
+    (with-slots (request first-keycode count) obj
+      (cond ((= request xcb:Mapping:Modifier)
+             ;; Modifier keys changed
+             (xcb:keysyms:update-modifier-mapping exwm--connection))
+            ((= request xcb:Mapping:Keyboard)
+             ;; Only updated changed keys
+             (xcb:keysyms:update-keyboard-mapping exwm--connection
+                                                  first-keycode count))))))
+
+(defun exwm-input--on-ButtonPress (data synthetic)
+  "Handle ButtonPress event."
+  (let ((obj (make-instance 'xcb:ButtonPress))
+        (mode xcb:Allow:SyncPointer))
+    (xcb:unmarshal obj data)
+    (with-slots (detail time event state) obj
+      (setq exwm-input--timestamp time)
+      (cond ((and (= state exwm-input--move-mask)
+                  (= detail exwm-input--move-keysym))
+             ;; Move
+             (exwm-floating--start-moveresize event
+                                             xcb:ewmh:_NET_WM_MOVERESIZE_MOVE))
+            ((and (= state exwm-input--resize-mask)
+                  (= detail exwm-input--resize-keysym))
+             ;; Resize
+             (exwm-floating--start-moveresize event))
+            (t
+             ;; Click to focus
+             (unless (and (boundp 'exwm--id) (= event exwm--id))
+               (exwm--with-current-id event
+                 (raise-frame (or exwm--floating-frame exwm--frame))
+                 (select-window (get-buffer-window nil 'visible))))
+             ;; The event should be replayed
+             (setq mode xcb:Allow:ReplayPointer))))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:AllowEvents :mode mode :time xcb:Time:CurrentTime))
+    (xcb:flush exwm--connection)))
+
+(defun exwm-input--on-KeyPress (data synthetic)
+  "Handle KeyPress event."
+  (let ((obj (make-instance 'xcb:KeyPress)))
+    (xcb:unmarshal obj data)
+    (setq exwm-input--timestamp (slot-value obj 'time))
+    (funcall 'exwm-input--handle-KeyPress obj)))
+
+(defvar exwm-input--global-keys nil "Global key bindings.")
+(defvar exwm-input--global-prefix-keys nil
+  "List of prefix keys of global key bindings.")
+
+(defun exwm-input--update-global-prefix-keys ()
+  "Update `exwm-input--global-prefix-keys'."
+  (when exwm--connection
+    (let ((original exwm-input--global-prefix-keys)
+          keysym)
+      (setq exwm-input--global-prefix-keys nil)
+      (dolist (i exwm-input--global-keys)
+        (cl-pushnew (elt i 0) exwm-input--global-prefix-keys))
+      (unless (equal original exwm-input--global-prefix-keys)
+        ;; Grab global keys on root window
+        (if (xcb:+request-checked+request-check exwm--connection
+                (make-instance 'xcb:UngrabKey
+                               :key xcb:Grab:Any :grab-window exwm--root
+                               :modifiers xcb:ModMask:Any))
+            (exwm--log "Failed to ungrab keys")
+          (dolist (i exwm-input--global-prefix-keys)
+            (setq keysym (xcb:keysyms:event->keysym i))
+            (when (or (not keysym)
+                      (xcb:+request-checked+request-check exwm--connection
+                          (make-instance 'xcb:GrabKey
+                                         :owner-events 0
+                                         :grab-window exwm--root
+                                         :modifiers (cadr keysym)
+                                         :key (xcb:keysyms:keysym->keycode
+                                               exwm--connection (car keysym))
+                                         :pointer-mode xcb:GrabMode:Async
+                                         :keyboard-mode xcb:GrabMode:Async)))
+              (user-error "[EXWM] Failed to grab key: %s" i))))))))
+
+(defun exwm-input-set-key (key command)
+  "Set a global key binding."
+  (global-set-key key command)
+  (cl-pushnew key exwm-input--global-keys))
+
+(defvar exwm-input--during-key-sequence nil
+  "Non-nil indicates Emacs is waiting for more keys to form a key sequence.")
+(defvar exwm-input--temp-line-mode nil
+  "Non-nil indicates it's in temporary line-mode for char-mode.")
+
+;; ;; This implementation has a problem that it also releases queued keys after
+;; ;; requesting AllowEvent. The client window will capture unexpected key events
+;; ;; in this case.
+;; ;; P.S.; to use this implementation, comment out the KeyRelease listener
+;; ;;       together with this one and make GrabKey in Sync mode.
+;; (cl-defmethod exwm-input--handle-KeyPress-line-mode ((obj xcb:KeyPress))
+;;   "Parse X KeyPress event to Emacs key event and then feed the command loop."
+;;   (with-slots (detail state) obj
+;;     (let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
+;;           event window mode)
+;;       (when (and keysym
+;;                  (setq event (xcb:keysyms:keysym->event keysym state))
+;;                  (or exwm-input--during-key-sequence
+;;                      (= exwm-input--focus-id xcb:Window:None)
+;;                      (setq window (active-minibuffer-window))
+;;                      (eq event ?\C-c)   ;mode-specific key
+;;                      (memq event exwm-input--global-prefix-keys)
+;;                      (memq event exwm-input-prefix-keys)
+;;                      (memq event
+;;                            exwm-input--simulation-prefix-keys)))
+;;         (setq mode xcb:Allow:SyncKeyboard)
+;;         (unless window (setq exwm-input--during-key-sequence t))
+;;         (push event unread-command-events))
+;;       (xcb:+request exwm--connection
+;;           (make-instance 'xcb:AllowEvents
+;;                          :mode (or mode xcb:Allow:ReplayKeyboard)
+;;                          :time xcb:Time:CurrentTime))
+;;       (xcb:flush exwm--connection))))
+
+;; This implementation has a drawback that some (legacy) applications
+;; (e.g. xterm) ignore the synthetic key events, making it only viable for EXWM
+;; to work in char-mode in such case.
+(cl-defmethod exwm-input--handle-KeyPress-line-mode ((obj xcb:KeyPress))
+  "Parse X KeyPress event to Emacs key event and then feed the command loop."
+  (with-slots (detail state) obj
+    (let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
+          event minibuffer-window)
+      (if (and keysym
+               (setq event (xcb:keysyms:keysym->event keysym state))
+               (or exwm-input--during-key-sequence
+                   (= exwm-input--focus-id xcb:Window:None)
+                   (setq minibuffer-window (active-minibuffer-window))
+                   (eq event ?\C-c)   ;mode-specific key
+                   (memq event exwm-input--global-prefix-keys)
+                   (memq event exwm-input-prefix-keys)
+                   (memq event exwm-input--simulation-prefix-keys)))
+          ;; Forward key to Emacs frame
+          (progn (unless minibuffer-window
+                   (setq exwm-input--during-key-sequence t))
+                 (push event unread-command-events))
+        ;; Forward key to window
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:SendEvent
+                           :propagate 0 :destination (slot-value obj 'event)
+                           :event-mask xcb:EventMask:NoEvent
+                           :event (xcb:marshal obj exwm--connection)))
+        (xcb:flush exwm--connection)))))
+
+(cl-defmethod exwm-input--handle-KeyPress-char-mode ((obj xcb:KeyPress))
+  "Handle KeyPress event in char-mode."
+  (with-slots (detail state) obj
+    (let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
+          event)
+      (when (and keysym (setq event (xcb:keysyms:keysym->event keysym state)))
+        (setq exwm-input--temp-line-mode t
+              exwm-input--during-key-sequence t)
+        (push event unread-command-events)
+        (exwm-input--grab-keyboard))))) ;grab keyboard temporarily
+
+(defalias 'exwm-input--handle-KeyPress 'exwm-input--handle-KeyPress-line-mode
+  "Generic function for handling KeyPress event.")
+
+(defun exwm-input--grab-keyboard (&optional id)
+  "Grab all key events on window ID."
+  (unless id (setq id (exwm--buffer->id (window-buffer))))
+  (when (xcb:+request-checked+request-check exwm--connection
+            (make-instance 'xcb:GrabKey
+                           :owner-events 0 :grab-window id
+                           :modifiers xcb:ModMask:Any
+                           :key xcb:Grab:Any
+                           :pointer-mode xcb:GrabMode:Async
+                           :keyboard-mode xcb:GrabMode:Async))
+    (exwm--log "Failed to grab keyboard for #x%x" id))
+  (defalias 'exwm-input--handle-KeyPress
+    'exwm-input--handle-KeyPress-line-mode))
+
+(defun exwm-input--release-keyboard (&optional id)
+  "Ungrab all key events on window ID."
+  (unless id (setq id (exwm--buffer->id (window-buffer))))
+  (when (xcb:+request-checked+request-check exwm--connection
+            (make-instance 'xcb:UngrabKey
+                           :key xcb:Grab:Any :grab-window id
+                           :modifiers xcb:ModMask:Any))
+    (exwm--log "Failed to release keyboard for #x%x" id))
+  (defalias 'exwm-input--handle-KeyPress
+    'exwm-input--handle-KeyPress-char-mode))
+
+(defun exwm-input-grab-keyboard (&optional id)
+  "Switch to line-mode."
+  (interactive)
+  (exwm-input--grab-keyboard id)
+  (setq mode-line-process
+        '(": "
+          (:propertize "line"
+                       help-echo "mouse-1: Switch to char-mode"
+                       mouse-face mode-line-highlight
+                       local-map
+                       (keymap
+                        (mode-line
+                         keymap
+                         (down-mouse-1 . exwm-input-release-keyboard))))))
+  (force-mode-line-update))
+
+(defun exwm-input-release-keyboard (&optional id)
+  "Switch to char-mode."
+  (interactive)
+  (exwm-input--release-keyboard id)
+  (setq mode-line-process
+        '(": "
+          (:propertize "char"
+                       help-echo "mouse-1: Switch to line-mode"
+                       mouse-face mode-line-highlight
+                       local-map
+                       (keymap
+                        (mode-line
+                         keymap
+                         (down-mouse-1 . exwm-input-grab-keyboard))))))
+  (force-mode-line-update))
+
+(defun exwm-input--fake-key (event)
+  "Fake a key event equivalent to Emacs event EVENT."
+  (let* ((keysym (xcb:keysyms:event->keysym event))
+         (keycode (xcb:keysyms:keysym->keycode exwm--connection (car keysym)))
+         (id (exwm--buffer->id (window-buffer (selected-window)))))
+    (when keycode
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:SendEvent
+                         :propagate 0 :destination id
+                         :event-mask xcb:EventMask:NoEvent
+                         :event (xcb:marshal
+                                 (make-instance 'xcb:KeyPress
+                                                :detail keycode
+                                                :time xcb:Time:CurrentTime
+                                                :root exwm--root :event id
+                                                :child 0
+                                                :root-x 0 :root-y 0
+                                                :event-x 0 :event-y 0
+                                                :state (cadr keysym)
+                                                :same-screen 1)
+                                 exwm--connection))))
+    (xcb:flush exwm--connection)))
+
+(defun exwm-input-send-next-key (times)
+  "Send next key to client window."
+  (interactive "p")
+  (when (> times 12) (setq times 12))
+  (let (key keys)
+    (dotimes (i times)
+      ;; Skip events not from keyboard
+      (setq exwm-input--during-key-sequence t)
+      (catch 'break
+        (while t
+          (setq key (read-key (format "Send key: %s (%d/%d)"
+                                      (key-description keys)
+                                      (1+ i) times)))
+          (unless (listp key) (throw 'break nil))))
+      (setq exwm-input--during-key-sequence nil)
+      (setq keys (vconcat keys (vector key)))
+      (exwm-input--fake-key key))))
+
+;; (defun exwm-input-send-last-key ()
+;;   (interactive)
+;;   (unless (listp last-input-event)      ;not a key event
+;;     (exwm-input--fake-key last-input-event)))
+
+(defvar exwm-input-prefix-keys
+  '(?\C-x ?\C-u ?\C-h ?\M-x ?\M-` ?\M-\S-! ?\M-\S-& ?\M-\S-:)
+  "List of prefix keys EXWM should forward to Emacs when in line-mode.")
+
+(defvar exwm-input--simulation-keys nil "Simulation keys in line-mode.")
+(defvar exwm-input--simulation-prefix-keys nil
+  "List of prefix keys of simulation keys in line-mode.")
+
+(defun exwm-input--update-simulation-prefix-keys ()
+  "Update the list of prefix keys of simulation keys."
+  (setq exwm-input--simulation-prefix-keys nil)
+  (dolist (i exwm-input--simulation-keys)
+    (define-key exwm-mode-map (car i) 'exwm-input-send-simulation-key)
+    (cl-pushnew (elt (car i) 0) exwm-input--simulation-prefix-keys)))
+
+(defun exwm-input-set-simulation-keys (simulation-keys)
+  "Set simulation keys.
+
+SIMULATION-KEYS is a list of alist (key-sequence1 . key-sequence2)."
+  (setq exwm-input--simulation-keys nil)
+  (dolist (i simulation-keys)
+    (cl-pushnew `(,(vconcat (car i)) . ,(cdr i)) exwm-input--simulation-keys))
+  (exwm-input--update-simulation-prefix-keys))
+
+(defun exwm-input-send-simulation-key ()
+  "Fake a key event according to last input key sequence."
+  (interactive)
+  (let ((pair (assoc (this-command-keys-vector) ;FIXME: pefix
+                     exwm-input--simulation-keys))
+        key)
+    (when pair
+      (setq pair (cdr pair))
+      (unless (listp pair)
+        (setq pair (list pair)))
+      (dolist (i pair)
+        (exwm-input--fake-key i)))))
+
+(defun exwm-input--init ()
+  "Initialize the keyboard module."
+  ;; Refresh keyboard mapping
+  (xcb:keysyms:init exwm--connection)
+  ;; Convert move/resize buttons
+  (let ((move-key (xcb:keysyms:event->keysym exwm-input-move-event))
+        (resize-key (xcb:keysyms:event->keysym exwm-input-resize-event)))
+    (setq exwm-input--move-keysym (car move-key)
+          exwm-input--move-mask (cadr move-key)
+          exwm-input--resize-keysym (car resize-key)
+          exwm-input--resize-mask (cadr resize-key)))
+  ;; Attach event listeners
+  (xcb:+event exwm--connection 'xcb:MappingNotify
+              'exwm-input--on-MappingNotify)
+  (xcb:+event exwm--connection 'xcb:KeyPress 'exwm-input--on-KeyPress)
+  (xcb:+event exwm--connection 'xcb:ButtonPress 'exwm-input--on-ButtonPress)
+  (xcb:+event exwm--connection 'xcb:ButtonRelease
+              'exwm-floating--stop-moveresize)
+  (xcb:+event exwm--connection 'xcb:MotionNotify 'exwm-floating--do-moveresize)
+  ;; `pre-command-hook' marks the end of a key sequence (existing or not)
+  (add-hook 'pre-command-hook 'exwm-input--finish-key-sequence)
+  ;; Update focus when buffer list updates
+  (add-hook 'buffer-list-update-hook 'exwm-input--update-focus)
+  ;; Update prefix keys for global keys
+  (exwm-input--update-global-prefix-keys))
+
+
+
+(provide 'exwm-input)
+
+;;; exwm-input.el ends here
diff --git a/exwm-layout.el b/exwm-layout.el
new file mode 100644
index 000000000000..7630b688e2b0
--- /dev/null
+++ b/exwm-layout.el
@@ -0,0 +1,194 @@
+;;; exwm-layout.el --- Layout Module for EXWM  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This module is responsible for keeping X client window properly displayed.
+
+;;; Code:
+
+(defun exwm-layout--show (id &optional window)
+  "Show window ID exactly fit in the Emacs window WINDOW."
+  (xcb:+request exwm--connection (make-instance 'xcb:MapWindow :window id))
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:icccm:set-WM_STATE
+                     :window id :state xcb:icccm:WM_STATE:NormalState
+                     :icon xcb:Window:None))
+  (let* ((edges (or (exwm--with-current-id id exwm--floating-edges)
+                    (window-inside-pixel-edges window)))
+         (x (elt edges 0))
+         (y (elt edges 1))
+         (width (- (elt edges 2) (elt edges 0)))
+         (height (- (elt edges 3) (elt edges 1))))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ConfigureWindow
+                       :window id
+                       :value-mask (logior xcb:ConfigWindow:X
+                                           xcb:ConfigWindow:Y
+                                           xcb:ConfigWindow:Width
+                                           xcb:ConfigWindow:Height
+                                           xcb:ConfigWindow:StackMode)
+                       :x x :y y :width width :height height
+                       ;; In order to put non-floating window at bottom
+                       :stack-mode xcb:StackMode:Below))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:SendEvent
+                       :propagate 0 :destination id
+                       :event-mask xcb:EventMask:StructureNotify
+                       :event (xcb:marshal
+                               (make-instance 'xcb:ConfigureNotify
+                                              :event id :window id
+                                              :above-sibling xcb:Window:None
+                                              :x x :y y
+                                              :width width :height height
+                                              :border-width 0
+                                              :override-redirect 0)
+                               exwm--connection))))
+  (xcb:flush exwm--connection))
+
+(defun exwm-layout--hide (id)
+  "Hide window ID."
+  (unless (eq xcb:icccm:WM_STATE:IconicState ;already hidden
+              (with-current-buffer (exwm--id->buffer id) exwm-state))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask xcb:EventMask:NoEvent))
+    (xcb:+request exwm--connection (make-instance 'xcb:UnmapWindow :window id))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ChangeWindowAttributes
+                       :window id :value-mask xcb:CW:EventMask
+                       :event-mask exwm--client-event-mask))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:icccm:set-WM_STATE
+                       :window id
+                       :state xcb:icccm:WM_STATE:IconicState
+                       :icon xcb:Window:None))
+    (xcb:flush exwm--connection)))
+
+(defun exwm-layout-set-fullscreen (&optional id)
+  "Make window ID fullscreen."
+  (interactive)
+  (with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
+    ;; Set the floating frame fullscreen first when the client is floating
+    (when exwm--floating-frame
+      (let* ((outer-id (frame-parameter exwm--floating-frame 'exwm-outer-id))
+             (geometry (xcb:+request-unchecked+reply exwm--connection
+                           (make-instance 'xcb:GetGeometry
+                                          :drawable outer-id))))
+        (setq exwm--floating-frame-geometry
+              (vector (slot-value geometry 'x) (slot-value geometry 'y)
+                      (slot-value geometry 'width)
+                      (slot-value geometry 'height)))
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:ConfigureWindow
+                           :window outer-id
+                           :value-mask (logior xcb:ConfigWindow:X
+                                               xcb:ConfigWindow:Y
+                                               xcb:ConfigWindow:Width
+                                               xcb:ConfigWindow:Height)
+                           :x 0 :y 0
+                           :width (x-display-pixel-width)
+                           :height (x-display-pixel-height))))
+      (xcb:flush exwm--connection))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ConfigureWindow
+                       :window exwm--id
+                       :value-mask (logior xcb:ConfigWindow:X
+                                           xcb:ConfigWindow:Y
+                                           xcb:ConfigWindow:Width
+                                           xcb:ConfigWindow:Height)
+                       :x 0 :y 0
+                       :width (x-display-pixel-width)
+                       :height (x-display-pixel-height)))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ewmh:set-_NET_WM_STATE
+                       :window exwm--id
+                       :data (vector xcb:Atom:_NET_WM_STATE_FULLSCREEN)))
+    (xcb:flush exwm--connection)
+    (cl-assert (not exwm--fullscreen))
+    (setq exwm--fullscreen t)
+    (exwm-input-release-keyboard)))
+
+(defun exwm-layout-unset-fullscreen (&optional id)
+  "Restore window from fullscreen state."
+  (interactive)
+  (with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
+    ;; Restore the floating frame if the client is floating
+    (when exwm--floating-frame
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ConfigureWindow
+                         :window (frame-parameter exwm--floating-frame
+                                                  'exwm-outer-id)
+                         :value-mask (logior xcb:ConfigWindow:X
+                                             xcb:ConfigWindow:Y
+                                             xcb:ConfigWindow:Width
+                                             xcb:ConfigWindow:Height)
+                         :x (elt exwm--floating-frame-geometry 0)
+                         :y (elt exwm--floating-frame-geometry 1)
+                         :width (elt exwm--floating-frame-geometry 2)
+                         :height (elt exwm--floating-frame-geometry 3))))
+    (exwm-layout--show exwm--id)
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ewmh:set-_NET_WM_STATE :window exwm--id :data []))
+    (xcb:flush exwm--connection)
+    (cl-assert exwm--fullscreen)
+    (setq exwm--fullscreen nil)
+    (exwm-input-grab-keyboard)))
+
+(defvar exwm-layout--window-configuration (current-window-configuration)
+  "Last saved window configuration, for avoiding unnecessary refreshes.")
+
+(defun exwm-layout--refresh ()
+  "Refresh layout."
+  (unless (compare-window-configurations exwm-layout--window-configuration
+                                         (current-window-configuration))
+    (setq exwm-layout--window-configuration (current-window-configuration))
+    (let ((frame (selected-frame))
+          windows)
+      (if (not (memq frame exwm-workspace--list))
+          ;; Refresh a floating frame
+          (when (eq major-mode 'exwm-mode)
+            (with-current-buffer (window-buffer (frame-first-window frame))
+              (exwm-layout--show exwm--id (frame-first-window frame))))
+        ;; Refresh the whole workspace
+        (dolist (pair exwm--id-buffer-alist)
+          (with-current-buffer (cdr pair)
+            ;; Exclude windows on other workspaces and floating frames
+            (when (and (eq frame exwm--frame) (not exwm--floating-frame))
+              (setq windows (get-buffer-window-list (current-buffer) 0))
+              (if (not windows)
+                  (exwm-layout--hide exwm--id)
+                (exwm-layout--show exwm--id (car windows))
+                (dolist (i (cdr windows))
+                  (set-window-buffer i "*scratch*"))))))))))
+
+(defun exwm-layout--init ()
+  "Initialize layout module."
+  ;; Auto refresh layout
+  (add-hook 'window-configuration-change-hook 'exwm-layout--refresh))
+
+
+
+(provide 'exwm-layout)
+
+;;; exwm-layout.el ends here
diff --git a/exwm-manage.el b/exwm-manage.el
new file mode 100644
index 000000000000..afab18e924b9
--- /dev/null
+++ b/exwm-manage.el
@@ -0,0 +1,333 @@
+;;; exwm-manage.el --- Window Management Module for  -*- lexical-binding: t -*-
+;;;                    EXWM
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This is the fundamental module of EXWM that deals with window management.
+
+;;; Code:
+
+(require 'exwm-input)
+
+(defvar exwm-manage-finish-hook nil
+  "Normal hook run after a window is just managed, in the context of the
+corresponding buffer.")
+
+(defun exwm-manage--update-geometry (id &optional force)
+  "Update window geometry."
+  (exwm--with-current-id id
+    (unless (and exwm--geometry (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:GetGeometry :drawable id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm--geometry reply))))))
+
+(defun exwm-manage--manage-window (id)
+  "Manage window ID."
+  (setq exwm-input--focus-lock t)
+  (catch 'return
+    ;; Ensure it's not managed
+    (when (assoc id exwm--id-buffer-alist)
+      (throw 'return 'managed))
+    ;; Ensure it's alive
+    (when (xcb:+request-checked+request-check exwm--connection
+              (make-instance 'xcb:ChangeWindowAttributes
+                             :window id :value-mask xcb:CW:EventMask
+                             :event-mask exwm--client-event-mask))
+      (throw 'return 'dead))
+    (with-current-buffer (generate-new-buffer "*EXWM*")
+      (push `(,id . ,(current-buffer)) exwm--id-buffer-alist)
+      (exwm-mode)
+      (setq exwm--id id)
+      (exwm--update-window-type id)
+      (exwm--update-class id)
+      (exwm-manage--update-geometry id)
+      ;; No need to manage (please check OverrideRedirect outside)
+      (when (or
+             (not
+              (or (not exwm-window-type)
+                  (memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY exwm-window-type)
+                  (memq xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG exwm-window-type)
+                  (memq xcb:Atom:_NET_WM_WINDOW_TYPE_NORMAL exwm-window-type)))
+             ;; For Java applications
+             (and exwm-instance-name
+                  (string-prefix-p "sun-awt-X11-" exwm-instance-name)
+                  (not (string-suffix-p "XFramePeer" exwm-instance-name))))
+        ;; Remove all events
+        (xcb:+request-checked+request-check exwm--connection
+            (make-instance 'xcb:ChangeWindowAttributes
+                           :window id :value-mask xcb:CW:EventMask
+                           :event-mask xcb:EventMask:NoEvent))
+        ;; The window needs to be mapped
+        (xcb:+request exwm--connection
+            (make-instance xcb:MapWindow :window id))
+        (with-slots (x y width height) exwm--geometry
+          ;; Reparent to virtual root (essential)
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:ReparentWindow
+                             :window id
+                             :parent (frame-parameter exwm-workspace--current
+                                                      'exwm-window-id)
+                             :x x :y y))
+          ;; Center window of type _NET_WM_WINDOW_TYPE_SPLASH
+          (when (memq xcb:Atom:_NET_WM_WINDOW_TYPE_SPLASH exwm-window-type)
+            (xcb:+request exwm--connection
+                (make-instance 'xcb:ConfigureWindow
+                               :window id
+                               :value-mask (logior xcb:ConfigWindow:X
+                                                   xcb:ConfigWindow:Y)
+                               :x (/ (- (x-display-pixel-width) width) 2)
+                               :y (/ (- (x-display-pixel-height) height) 2)))))
+        (xcb:flush exwm--connection)
+        (setq kill-buffer-query-functions nil)
+        (setq exwm--id-buffer-alist (assq-delete-all id exwm--id-buffer-alist))
+        (kill-buffer (current-buffer))
+        (throw 'return 'ignored))
+      ;; Manage the window
+      (xcb:+request exwm--connection    ;remove border
+          (make-instance 'xcb:ConfigureWindow
+                         :window id :value-mask xcb:ConfigWindow:BorderWidth
+                         :border-width 0))
+      (xcb:+request exwm--connection ;grab buttons for set focus/move/resize
+          (make-instance 'xcb:GrabButton
+                         :owner-events 0 :grab-window id
+                         :event-mask xcb:EventMask:ButtonPress
+                         :pointer-mode xcb:GrabMode:Sync
+                         :keyboard-mode xcb:GrabMode:Async
+                         :confine-to xcb:Window:None
+                         :cursor xcb:Cursor:None
+                         :button xcb:ButtonIndex:Any
+                         :modifiers xcb:ModMask:Any))
+      (xcb:flush exwm--connection)
+      (exwm--update-title id)
+      (exwm--update-transient-for id)
+      (exwm--update-normal-hints id)
+      (exwm--update-hints id)
+      (exwm--update-protocols id)
+      (exwm--update-state id)
+      (if (or exwm-transient-for exwm--fixed-size
+              (memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY exwm-window-type)
+              (memq xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG exwm-window-type))
+          (exwm-floating--set-floating id)
+        (exwm-floating--unset-floating id))
+      (exwm-input-grab-keyboard id)
+      (exwm-workspace--update-switch-history)
+      (setq exwm-input--focus-lock nil) ;unlocked in advance
+      (with-current-buffer (exwm--id->buffer id)
+        (run-hooks 'exwm-manage-finish-hook))))
+  (setq exwm-input--focus-lock nil))
+
+(defun exwm-manage--unmanage-window (id &optional withdraw-only)
+  "Unmanage window ID."
+  (let ((buffer (exwm--id->buffer id)))
+    (setq exwm--id-buffer-alist (assq-delete-all id exwm--id-buffer-alist))
+    (when (buffer-live-p buffer)
+      (with-current-buffer buffer
+        (exwm-workspace--update-switch-history)
+        ;;
+        (when withdraw-only
+          ;; Reparent back to root
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:ChangeWindowAttributes
+                             :window id :value-mask xcb:CW:EventMask
+                             :event-mask xcb:EventMask:NoEvent))
+          (let (x y geometry geometry-parent)
+            (if (not exwm--floating-frame)
+                (setq x 0 y 0)          ;the position does not matter
+              (setq geometry-parent
+                    (xcb:+request-unchecked+reply exwm--connection
+                        (make-instance 'xcb:GetGeometry
+                                       :drawable
+                                       (frame-parameter exwm--floating-frame
+                                                        'exwm-outer-id)))
+                    geometry (xcb:+request-unchecked+reply exwm--connection
+                                 (make-instance 'xcb:GetGeometry
+                                                :drawable id)))
+              (if (not (and geometry-parent geometry))
+                  (setq x 0 y 0)        ;e.g. have been destroyed
+                (setq x (+ (slot-value geometry-parent 'x)
+                           (slot-value geometry 'x))
+                      y (+ (slot-value geometry-parent 'y)
+                           (slot-value geometry 'y)))))
+            (xcb:+request exwm--connection
+                (make-instance 'xcb:ReparentWindow
+                               :window id :parent exwm--root :x x :y y)))
+          ;; Delete WM_STATE property
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:DeleteProperty
+                             :window id :property xcb:Atom:WM_STATE))
+          (xcb:flush exwm--connection))
+        (setq kill-buffer-query-functions nil)
+        (kill-buffer)
+        (select-frame-set-input-focus exwm-workspace--current)))))
+
+(defun exwm-manage--scan ()
+  "Search for existing windows and try to manage them."
+  (let* ((tree (xcb:+request-unchecked+reply exwm--connection
+                   (make-instance 'xcb:QueryTree :window exwm--root))))
+    (dolist (i (slot-value tree 'children))
+      (with-slots (override-redirect map-state)
+          (xcb:+request-unchecked+reply exwm--connection
+              (make-instance 'xcb:GetWindowAttributes :window i))
+        (when (and (= 0 override-redirect) (= xcb:MapState:Viewable map-state))
+          (exwm-manage--manage-window i))))))
+
+(defvar exwm-manage--ping-lock nil
+  "Non-nil indicates EXWM is pinging a window.")
+(defvar exwm-manage-ping-timeout 3 "Seconds to wait before killing a client.")
+
+(defun exwm-manage--close-window (id &optional buffer)
+  "Close window ID in a proper way."
+  (catch 'return
+    (unless buffer (setq buffer (exwm--id->buffer id)))
+    ;; Destroy the client window if it does not support WM_DELETE_WINDOW
+    (unless (and (buffer-live-p buffer)
+                 (with-current-buffer buffer
+                   (memq xcb:Atom:WM_DELETE_WINDOW exwm--protocols)))
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:DestroyWindow :window id))
+      (xcb:flush exwm--connection)
+      (throw 'return nil))
+    ;; Try to close the window with WM_DELETE_WINDOW client message
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:icccm:SendEvent
+                       :destination id
+                       :event (xcb:marshal
+                               (make-instance 'xcb:icccm:WM_DELETE_WINDOW
+                                              :window id)
+                               exwm--connection)))
+    (xcb:flush exwm--connection)
+    ;; Try to determine if the client stop responding
+    ;; FIXME: check
+    (with-current-buffer buffer
+      (when (memq xcb:Atom:_NET_WM_PING exwm--protocols)
+        (setq exwm-manage--ping-lock t)
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:SendEvent
+                           :propagate 0 :destination id
+                           :event-mask xcb:EventMask:NoEvent
+                           :event (xcb:marshal
+                                   (make-instance 'xcb:ewmh:_NET_WM_PING
+                                                  :window id :timestamp 0
+                                                  :client-window id)
+                                   exwm--connection)))
+        (xcb:flush exwm--connection)
+        (with-timeout (exwm-manage-ping-timeout
+                       (if (yes-or-no-p (format "\
+`%s' is not responding. Would you like to kill it? " (buffer-name buffer)))
+                           (progn (exwm-manage--kill-client id)
+                                  (throw 'return nil))
+                         (throw 'return nil)))
+          (while (and exwm-manage--ping-lock
+                      (exwm--id->buffer id)) ;may have be destroyed
+            (accept-process-output nil 0.1)))
+        (throw 'return nil)))
+    (throw 'return nil)))
+
+(defun exwm-manage--kill-client (&optional id)
+  "Kill an X client."
+  (interactive)
+  (unless id (setq id (exwm--buffer->id (current-buffer))))
+  (let ((pid (slot-value
+              (xcb:+request-unchecked+reply exwm--connection
+                  (make-instance 'xcb:ewmh:get-_NET_WM_PID :window id))
+              'value)))
+    (if pid
+        (signal-process pid 'SIGKILL)
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:KillClient :resource id))
+      (xcb:flush exwm--connection))))
+
+(defun exwm-manage--on-ConfigureRequest (data synthetic)
+  "Handle ConfigureRequest event."
+  (let ((obj (make-instance 'xcb:ConfigureRequest))
+        buffer edges)
+    (xcb:unmarshal obj data)
+    (with-slots (window x y width height border-width) obj
+      (if (setq buffer (exwm--id->buffer window))
+          ;; Send client message for managed windows
+          (progn
+            (setq edges (or (with-current-buffer buffer exwm--floating-edges)
+                            (window-inside-absolute-pixel-edges
+                             (get-buffer-window buffer))))
+            (xcb:+request exwm--connection
+                (make-instance 'xcb:SendEvent
+                               :propagate 0 :destination window
+                               :event-mask xcb:EventMask:StructureNotify
+                               :event (xcb:marshal
+                                       (make-instance
+                                        'xcb:ConfigureNotify
+                                        :event window :window window
+                                        :above-sibling xcb:Window:None
+                                        :x (elt edges 0) :y (elt edges 1)
+                                        :width (- (elt edges 2) (elt edges 0))
+                                        :height (- (elt edges 3) (elt edges 1))
+                                        :border-width 0 :override-redirect 0)
+                                       exwm--connection))))
+        ;; Configure unmanaged windows
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:ConfigureWindow
+                           :window window
+                           :value-mask (logior xcb:ConfigWindow:X
+                                               xcb:ConfigWindow:Y
+                                               xcb:ConfigWindow:Width
+                                               xcb:ConfigWindow:Height
+                                               xcb:ConfigWindow:BorderWidth)
+                           :x x :y y :width width :height height
+                           :border-width border-width)))))
+  (xcb:flush exwm--connection))
+
+(defun exwm-manage--on-MapRequest (data synthetic)
+  "Handle MapRequest event."
+  (let ((obj (make-instance 'xcb:MapRequest)))
+    (xcb:unmarshal obj data)
+    (exwm-manage--manage-window (slot-value obj 'window))))
+
+(defun exwm-manage--on-UnmapNotify (data synthetic)
+  "Handle UnmapNotify event."
+  (unless synthetic
+    (let ((obj (make-instance 'xcb:UnmapNotify)))
+      (xcb:unmarshal obj data)
+      (exwm-manage--unmanage-window (slot-value obj 'window) t))))
+
+(defun exwm-manage--on-DestroyNotify (data synthetic)
+  "Handle DestroyNotify event."
+  (unless synthetic
+    (let ((obj (make-instance 'xcb:DestroyNotify)))
+      (xcb:unmarshal obj data)
+      (exwm-manage--unmanage-window (slot-value obj 'window)))))
+
+(defun exwm-manage--init ()
+  "Initialize manage module."
+  (xcb:+event exwm--connection 'xcb:ConfigureRequest
+              'exwm-manage--on-ConfigureRequest)
+  (xcb:+event exwm--connection 'xcb:MapRequest 'exwm-manage--on-MapRequest)
+  (xcb:+event exwm--connection 'xcb:UnmapNotify 'exwm-manage--on-UnmapNotify)
+  (xcb:+event exwm--connection 'xcb:DestroyNotify
+              'exwm-manage--on-DestroyNotify))
+
+
+
+(provide 'exwm-manage)
+
+;;; exwm-manage.el ends here
diff --git a/exwm-workspace.el b/exwm-workspace.el
new file mode 100644
index 000000000000..c225c434ddf7
--- /dev/null
+++ b/exwm-workspace.el
@@ -0,0 +1,230 @@
+;;; exwm-workspace.el --- Workspace Module for EXWM  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This module adds workspace support for EXWM.
+
+;; Todo:
+;; + prevent from deleting frames of Emacs client (`frame-delete-functions')
+
+;;; Code:
+
+(defvar exwm-workspace-number 4 "Number of workspaces (1 ~ 10).")
+(defvar exwm-workspace--list nil "List of all workspaces (Emacs frames).")
+(defvar exwm-workspace--switch-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map [t] (lambda () (interactive)))
+    (dotimes (i 10)
+      (define-key map (int-to-string i)
+        `(lambda ()
+           (interactive)
+           (when (< ,i exwm-workspace-number)
+             (goto-history-element ,(1+ i))
+             (exit-minibuffer)))))
+    (define-key map "\C-a" (lambda () (interactive) (goto-history-element 1)))
+    (define-key map "\C-e" (lambda ()
+                             (interactive)
+                             (goto-history-element exwm-workspace-number)))
+    (define-key map "\C-g" 'abort-recursive-edit)
+    (define-key map "\C-]" 'abort-recursive-edit)
+    (define-key map "\C-j" 'exit-minibuffer)
+    ;; (define-key map "\C-m" 'exit-minibuffer) ;not working
+    (define-key map [return] 'exit-minibuffer)
+    (define-key map " " 'exit-minibuffer)
+    (define-key map "\C-f" 'previous-history-element)
+    (define-key map "\C-b" 'next-history-element)
+    ;; Alternative keys
+    (define-key map [right] 'previous-history-element)
+    (define-key map [left] 'next-history-element)
+    map)
+  "Keymap used for interactively switch workspace.")
+
+(defvar exwm-workspace--switch-history nil
+  "History for `read-from-minibuffer' to interactively switch workspace.")
+
+(defun exwm-workspace--update-switch-history ()
+  "Update the history for switching workspace to reflect the latest status."
+  (let ((sequence (number-sequence 0 (1- exwm-workspace-number)))
+        (not-empty (make-vector exwm-workspace-number nil)))
+    (dolist (i exwm--id-buffer-alist)
+      (with-current-buffer (cdr i)
+        (setf (elt not-empty (cl-position exwm--frame exwm-workspace--list))
+              t)))
+    (setq exwm-workspace--switch-history
+          (mapcar
+           (lambda (i)
+             (mapconcat
+              (lambda (j)
+                (format (if (= i j) "[%s]" " %s ")
+                        (propertize
+                         (int-to-string j)
+                         'face
+                         (cond ((frame-parameter (elt exwm-workspace--list j)
+                                                 'exwm--urgency)
+                                '(:foreground "orange"))
+                               ((elt not-empty j) '(:foreground "green"))
+                               (t nil)))))
+              sequence ""))
+           sequence))))
+
+(defvar exwm-workspace--current nil "Current active workspace.")
+(defvar exwm-workspace-current-index 0 "Index of current active workspace.")
+
+(defun exwm-workspace-switch (index &optional force)
+  "Switch to workspace INDEX. Query for INDEX if it's not specified.
+
+The optional FORCE option is for internal use only "
+  (interactive
+   (list
+    (let* ((history-add-new-input nil)  ;prevent modifying history
+           (idx (read-from-minibuffer
+                 "Workspace: " (elt exwm-workspace--switch-history
+                                    exwm-workspace-current-index)
+                 exwm-workspace--switch-map nil
+                 `(exwm-workspace--switch-history
+                   . ,(1+ exwm-workspace-current-index)))))
+      (cl-position idx exwm-workspace--switch-history :test 'equal))))
+  (unless (and (<= 0 index) (< index exwm-workspace-number))
+    (user-error "[EXWM] Workspace index out of range: %d" index))
+  (when (or force (/= exwm-workspace-current-index index))
+    (select-frame-set-input-focus (elt exwm-workspace--list index))
+    ;; Hide all workspaces but the selected one
+    (dotimes (i exwm-workspace-number)
+      (unless (= i index) (make-frame-invisible (elt exwm-workspace--list i))))
+    (setq exwm-workspace--current (elt exwm-workspace--list index)
+          exwm-workspace-current-index index)
+    (setq default-minibuffer-frame (selected-frame))
+    ;; Hide windows in other workspaces by preprending a space
+    (dolist (i exwm--id-buffer-alist)
+      (with-current-buffer (cdr i)
+        (let ((name (replace-regexp-in-string "^\\s-*" "" (buffer-name))))
+          (rename-buffer (if (eq (selected-frame) exwm--frame)
+                             name
+                           (concat " " name))))))
+    ;; Update demands attention flag
+    (set-frame-parameter (selected-frame) 'exwm--urgency nil)
+    ;; Update switch workspace history
+    (exwm-workspace--update-switch-history)
+    ;; Update _NET_CURRENT_DESKTOP
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ewmh:set-_NET_CURRENT_DESKTOP
+                       :window exwm--root :data index))
+    (xcb:flush exwm--connection)))
+
+(defun exwm-workspace-move-window (index &optional id)
+  "Move window ID to workspace INDEX."
+  (interactive
+   (list
+    (let* ((history-add-new-input nil)  ;prevent modifying history
+           (idx (read-from-minibuffer
+                 "Workspace: " (elt exwm-workspace--switch-history
+                                    exwm-workspace-current-index)
+                 exwm-workspace--switch-map nil
+                 `(exwm-workspace--switch-history
+                   . ,(1+ exwm-workspace-current-index)))))
+      (cl-position idx exwm-workspace--switch-history :test 'equal))))
+  (unless id (setq id (exwm--buffer->id (window-buffer))))
+  (unless (and (<= 0 index) (< index exwm-workspace-number))
+    (user-error "[EXWM] Workspace index out of range: %d" index))
+  (when (/= exwm-workspace-current-index index)
+    (set-window-buffer (get-buffer-window (exwm--id->buffer id))
+                       (other-buffer))
+    (let ((frame (elt exwm-workspace--list index)))
+      (with-current-buffer (exwm--id->buffer id)
+        (setq exwm--frame frame)
+        (rename-buffer
+         (concat " " (replace-regexp-in-string "^\\s-*" "" (buffer-name))))
+        (if exwm--floating-frame
+            ;; Move the floating frame is enough
+            (xcb:+request exwm--connection
+            (make-instance 'xcb:ReparentWindow
+                           :window (frame-parameter exwm--floating-frame
+                                                    'exwm-outer-id)
+                           :parent (frame-parameter frame 'exwm-window-id)
+                           :x 0 :y 0))
+          ;; Move the window itself
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:ChangeWindowAttributes
+                             :window id :value-mask xcb:CW:EventMask
+                             :event-mask xcb:EventMask:NoEvent))
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:ReparentWindow
+                             :window id
+                             :parent (frame-parameter frame 'exwm-window-id)
+                             :x 0 :y 0))
+          (xcb:+request exwm--connection
+              (make-instance 'xcb:ChangeWindowAttributes
+                             :window id :value-mask xcb:CW:EventMask
+                             :event-mask exwm--client-event-mask)))))
+    (xcb:flush exwm--connection)
+    (exwm-workspace--update-switch-history)))
+
+(defun exwm-workspace--init ()
+  "Initialize workspace module."
+  (cl-assert (and (< 0 exwm-workspace-number) (>= 10 exwm-workspace-number)))
+  ;; Prevent unexpected exit
+  (setq confirm-kill-emacs
+        (lambda (prompt)
+          (pcase (length exwm--id-buffer-alist)
+            (0 (y-or-n-p prompt))
+            (x (yes-or-no-p (format "[EXWM] %d window%s currently alive. %s"
+                                    x (if (= x 1) "" "s") prompt))))))
+  ;; Initialize workspaces
+  (setq exwm-workspace--list (frame-list))
+  (when (< 1 (length exwm-workspace--list))
+    ;; Emacs client creates an extra (but unusable) frame
+    (dolist (i exwm-workspace--list)
+      (unless (frame-parameter i 'window-id)
+        (setq exwm-workspace--list (delq i exwm-workspace--list)))))
+  (cl-assert (= 1 (length exwm-workspace--list)))
+  ;; Configure the existing frame
+  (set-frame-parameter (car exwm-workspace--list) 'fullscreen 'fullboth)
+  ;; Create remaining frames
+  (dotimes (i (1- exwm-workspace-number))
+    (nconc exwm-workspace--list
+           (list (make-frame '((window-system . x) (fullscreen . fullboth))))))
+  ;; Configure workspaces
+  (dolist (i exwm-workspace--list)
+    (let ((window-id (string-to-int (frame-parameter i 'window-id)))
+          (outer-id (string-to-int (frame-parameter i 'outer-window-id))))
+      ;; Save window IDs
+      (set-frame-parameter i 'exwm-window-id window-id)
+      (set-frame-parameter i 'exwm-outer-id outer-id)
+      ;; Set OverrideRedirect on all frames
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ChangeWindowAttributes
+                         :window outer-id :value-mask xcb:CW:OverrideRedirect
+                         :override-redirect 1))
+      ;; Select events on all virtual roots
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ChangeWindowAttributes
+                         :window window-id :value-mask xcb:CW:EventMask
+                         :event-mask xcb:EventMask:SubstructureRedirect))))
+  ;; Switch to the first workspace
+  (exwm-workspace-switch 0 t))
+
+
+
+(provide 'exwm-workspace)
+
+;;; exwm-workspace.el ends here
diff --git a/exwm.el b/exwm.el
new file mode 100644
index 000000000000..49c4380405be
--- /dev/null
+++ b/exwm.el
@@ -0,0 +1,706 @@
+;;; exwm.el --- Emacs X Window Manager  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2015 Chris Feng
+
+;; Author: Chris Feng <chris.w.feng@gmail.com>
+;; Keywords: unix
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Overview
+;; --------
+;; EXWM (Emacs X Window Manager) turns Emacs into a full-featured tiling X
+;; window manager. It's built on top of XELB, thus purely consists of Elisp
+;; codes. Some features include:
+;; + It's fully keyboard-driven.
+;;   - You have full access to all key bindings in Emacs.
+;;   - It allows you to bind additional key sequences with `exwm-input-set-key'
+;;     (just like `global-set-key').
+;;   - It supports simulation keys (i.e., map one key sequence to another).
+;; + Workspace support.
+;;   - EXWM support up to 10 workspaces.
+;; + ICCCM/EWMH compliance.
+;;   - Note that the support for EWMH can never be complete since EXWM is not a
+;;     conventional window manager.
+
+;; How it works
+;; ------------
+;; Emacs itself is an tiling window manager, though unfortunately not for
+;; managing X things. EXWM is therefore created to overcome this limitation by
+;; relating X concepts to Emacs ones as shown in the following table.
+;;
+;; +=============+=========+
+;; | X Window    | Emacs   |
+;; +=============+=========+
+;; | window      | buffer  |
+;; +-------------+---------+
+;; | container*  | window  |
+;; +-------------+---------+
+;; | workspace / | frame** |
+;; | decoration  |         |
+;; +=============+=========+
+;; *  Here a container means the parent of an X client window created by window
+;;    manager for layout management.
+;; ** In EXWM, A frame usually acts as a workspace. But for a floating window,
+;;    it's the decoration around the top-level window.
+;;
+;; Each X client window corresponds to a dedicated buffer in EXWM mode. When
+;; such a buffer is buried or unburied, the attached X client window is hide or
+;; shown accordingly. The position and size of the X client window is then
+;; determined by the Emacs window its corresponding buffer displayed in.
+;;
+;; A buffer in EXWM mode also records which workspace it belongs to, and its
+;; attached X client window is made a child (in the sense of X) of the
+;; workspace frame. The switch between workspaces is simply done by switching
+;; corresponding Emacs frames.
+
+;; Installation & configuration
+;; ----------------------------
+;; Here are the minimal steps to get EXWM working:
+;; 0. Install xelb and xelb-util first.
+;; 1. Put EXWM somewhere on your disk and make sure it's in `load-path'.
+;; 2. In your Emacs init file, add following lines (modify accordingly):
+;;
+;;    (require 'exwm)
+;;    ;; We always need a way to go back from char-mode to line-mode
+;;    (exwm-input-set-key (kbd "s-r") 'exwm-reset)
+;;    ;; Bind a key to switch workspace interactively
+;;    (exwm-input-set-key (kbd "s-w") 'exwm-workspace-switch)
+;;    ;; Use class name to name an EXWM buffer
+;;    (add-hook 'exwm-update-class-hook
+;;              (lambda () (rename-buffer exwm-class-name t)))
+;;    ;; Enable EXWM
+;;    (exwm-enable)
+;;
+;; 3. Make a file '~/.xinitrc' with the content
+;;
+;;    exec emacs
+;;
+;; 4. Launch EXWM in a console with
+;;
+;;    xinit
+;;
+;; You should refer to other resources on how to further configure '~/.xinitrc'
+;; and other init scripts to improve the working experience. Besides, you
+;; should hide the menu-bar, tool-bar, etc to increase the usable space.
+
+;; Interactive modes
+;; -----------------
+;; There are two modes in EXWM to interact with an X client window: line mode
+;; and char mode. They are analogous to those concepts in `ansi-term'. EXWM
+;; buffers are created in line mode by default.
+;;
+;; In line mode, all key events are intercepted and then forwarded to the X
+;; client window except
+;; + it forms a mode-specific key sequence (which begins with 'C-c'), or
+;; + it forms a key sequence bound with `exwm-input-set-key', or
+;; + it forms a key sequence starting with a line mode prefix key, or
+;; + it forms a key sequence in line mode simulation keys.
+;; You can use 'C-c q' (bound to `exwm-input-send-next-key', can be 'C-u'
+;; prefixed) to send these keys to the client.
+;;
+;; In char mode however, no key event is intercepted except those bound with
+;; `exwm-input-set-key'. Therefore you will almost always need to
+;; 'exwm-input-set-key' a key sequence to go from char mode to line mode.
+
+;; Related projects
+;; ----------------
+;; EXWM is not the first attempt to make Emacs an X window manger; there is
+;; another ancient project called XWEM (http://www.nongnu.org/xwem/) for
+;; XEmacs, though it seems nobody have ever got it working on GNU Emacs.
+
+;; Todo:
+;; + Add RandR support.
+;; + Investigate DnD support (e.g. drag a chromium tab to another window).
+;; + Auto hide minibuffer, or allow users to place it elsewhere.
+;; + Add system tray support.
+
+;; References:
+;; + dwm (http://dwm.suckless.org/)
+;; + i3 wm (https://i3wm.org/)
+;; + Also see references within each required library.
+
+;;; Code:
+
+(require 'xcb)
+(require 'xcb-icccm)
+(require 'xcb-ewmh)
+(require 'exwm-workspace)
+(require 'exwm-layout)
+(require 'exwm-floating)
+(require 'exwm-manage)
+(require 'exwm-input)
+
+(defvar exwm-debug-on nil "Non-nil to turn on debug for EXWM.")
+
+(defmacro exwm--log (format-string &rest args)
+  "Print debug message."
+  (when exwm-debug-on
+    `(message (concat "[EXWM] " ,format-string) ,@args)))
+
+(defconst exwm--client-event-mask
+  (logior xcb:EventMask:StructureNotify xcb:EventMask:PropertyChange)
+  "Event mask set on all managed windows.")
+
+(defvar exwm--connection nil "X connection.")
+(defvar exwm--root nil "Root window.")
+(defvar exwm--id-buffer-alist nil "Alist of (<X window ID> . <Emacs buffer>)")
+
+(defsubst exwm--id->buffer (id)
+  "X window ID => Emacs buffer."
+  (cdr (assoc id exwm--id-buffer-alist)))
+
+(defsubst exwm--buffer->id (buffer)
+  "Emacs buffer => X window ID."
+  (car (rassoc buffer exwm--id-buffer-alist)))
+
+(defun exwm--lock (&rest args)          ;args are for abnormal hook
+  "Lock (disable all events)."
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ChangeWindowAttributes
+                     :window exwm--root
+                     :value-mask xcb:CW:EventMask
+                     :event-mask xcb:EventMask:NoEvent))
+  (xcb:flush exwm--connection))
+
+(defun exwm--unlock (&rest args)        ;args are for abnormal hook
+  "Unlock (enable all events)."
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ChangeWindowAttributes
+                     :window exwm--root
+                     :value-mask xcb:CW:EventMask
+                     :event-mask (logior xcb:EventMask:StructureNotify
+                                         xcb:EventMask:SubstructureRedirect)))
+  (xcb:flush exwm--connection))
+
+(defun exwm-reset ()
+  "Reset window to standard state: non-fullscreen, line-mode."
+  (interactive)
+  (with-current-buffer (window-buffer (selected-window))
+    (when exwm--fullscreen (exwm-layout-unset-fullscreen))
+    (exwm-input-grab-keyboard)))
+
+(defmacro exwm--with-current-id (id &rest body)
+  "Evaluate BODY in the context of the buffer corresponding to window ID."
+  (declare (indent 1))
+  `(when ,id
+     (let ((buffer (exwm--id->buffer ,id)))
+       (when buffer
+         (with-current-buffer buffer ,@body)))))
+
+(defun exwm--update-window-type (id &optional force)
+  "Update _NET_WM_WINDOW_TYPE."
+  (exwm--with-current-id id
+    (unless (and exwm-window-type (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:ewmh:get-_NET_WM_WINDOW_TYPE
+                                      :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-window-type (append (slot-value reply 'value) nil)))))))
+
+(defvar exwm-update-class-hook nil
+  "Normal hook run when window class is updated.")
+
+(defun exwm--update-class (id &optional force)
+  "Update WM_CLASS."
+  (exwm--with-current-id id
+    (unless (and exwm-instance-name exwm-class-name (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_CLASS :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-instance-name (slot-value reply 'instance-name)
+                exwm-class-name (slot-value reply 'class-name))
+          (when (and exwm-instance-name exwm-class-name)
+            (run-hooks 'exwm-update-class-hook)))))))
+
+(defvar exwm-update-title-hook nil
+  "Normal hook run when window title is updated.")
+
+(defun exwm--update-utf8-title (id &optional force)
+  "Update _NET_WM_NAME."
+  (exwm--with-current-id id
+    (when (or force (not exwm-title))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:ewmh:get-_NET_WM_NAME :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-title (slot-value reply 'value))
+          (when exwm-title
+            (setq exwm--title-is-utf8 t)
+            (run-hooks 'exwm-update-title-hook)))))))
+
+(defun exwm--update-ctext-title (id &optional force)
+  "Update WM_NAME."
+  (exwm--with-current-id id
+    (unless (or exwm--title-is-utf8
+                (and exwm-title (not force)))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_NAME :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-title (slot-value reply 'value))
+          (when exwm-title
+            (run-hooks 'exwm-update-title-hook)))))))
+
+(defun exwm--update-title (id)
+  "Update _NET_WM_NAME or WM_NAME."
+  (exwm--update-utf8-title id)
+  (exwm--update-ctext-title id))
+
+(defun exwm--update-transient-for (id &optional force)
+  "Update WM_TRANSIENT_FOR."
+  (exwm--with-current-id id
+    (unless (and exwm-transient-for (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_TRANSIENT_FOR
+                                      :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-transient-for (slot-value reply 'value)))))))
+
+(defun exwm--update-normal-hints (id &optional force)
+  "Update WM_NORMAL_HINTS."
+  (exwm--with-current-id id
+    (unless (and (not force)
+                 (or exwm--normal-hints-x exwm--normal-hints-y
+                     exwm--normal-hints-width exwm--normal-hints-height
+                     exwm--normal-hints-min-width exwm--normal-hints-min-height
+                     exwm--normal-hints-max-width exwm--normal-hints-max-height
+                     ;; FIXME: other fields
+                     ))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_NORMAL_HINTS
+                                      :window id))))
+        (when (and reply (slot-value reply 'flags)) ;nil when destroyed
+          (with-slots (flags x y width height min-width min-height max-width
+                             max-height base-width base-height ;; win-gravity
+                             )
+              reply
+            (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:USPosition))
+              (setq exwm--normal-hints-x x exwm--normal-hints-y y))
+            (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:USSize))
+              (setq exwm--normal-hints-width width
+                    exwm--normal-hints-height height))
+            (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PMinSize))
+              (setq exwm--normal-hints-min-width min-width
+                    exwm--normal-hints-min-height min-height))
+            (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PMaxSize))
+              (setq exwm--normal-hints-max-width max-width
+                    exwm--normal-hints-max-height max-height))
+            (unless (or exwm--normal-hints-min-width
+                        (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PBaseSize)))
+              (setq exwm--normal-hints-min-width base-width
+                    exwm--normal-hints-min-height base-height))
+            ;; (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PWinGravity))
+            ;;   (setq exwm--normal-hints-win-gravity win-gravity))
+            (setq exwm--fixed-size
+                  (and exwm--normal-hints-min-width
+                       exwm--normal-hints-min-height
+                       exwm--normal-hints-max-width
+                       exwm--normal-hints-max-height
+                       (/= 0 exwm--normal-hints-min-width)
+                       (/= 0 exwm--normal-hints-min-height)
+                       (= exwm--normal-hints-min-width
+                          exwm--normal-hints-max-width)
+                       (= exwm--normal-hints-min-height
+                          exwm--normal-hints-max-height)))))))))
+
+(defun exwm--update-hints (id &optional force)
+  "Update WM_HINTS."
+  (exwm--with-current-id id
+    (unless (and (not force) exwm--hints-input exwm--hints-urgency)
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_HINTS :window id))))
+        (when (and reply (slot-value reply 'flags)) ;nil when destroyed
+          (with-slots (flags input) reply
+            (when flags
+              (unless (= 0 (logand flags xcb:icccm:WM_HINTS:InputHint))
+                (setq exwm--hints-input (when input (= 1 input))))
+              (unless (= 0 (logand flags xcb:icccm:WM_HINTS:UrgencyHint))
+                (setq exwm--hints-urgency t))))
+          (when (and exwm--hints-urgency
+                     (not (eq exwm--frame exwm-workspace--current)))
+            (unless (frame-parameter exwm--frame 'exwm--urgency)
+              (set-frame-parameter exwm--frame 'exwm--urgency t)
+              (exwm-workspace--update-switch-history))))))))
+
+(defun exwm--update-protocols (id &optional force)
+  "Update WM_PROTOCOLS."
+  (exwm--with-current-id id
+    (unless (and exwm--protocols (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_PROTOCOLS
+                                      :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm--protocols (append (slot-value reply 'value) nil)))))))
+
+(defun exwm--update-state (id &optional force)
+  "Update WM_STATE."
+  (exwm--with-current-id id
+    (unless (and exwm-state (not force))
+      (let ((reply (xcb:+request-unchecked+reply exwm--connection
+                       (make-instance 'xcb:icccm:get-WM_STATE :window id))))
+        (when reply                     ;nil when destroyed
+          (setq exwm-state (or (slot-value reply 'state)
+                               ;; Default to normal state
+                               xcb:icccm:WM_STATE:NormalState)))))))
+
+(defun exwm--on-PropertyNotify (data synthetic)
+  "Handle PropertyNotify event."
+  (let ((obj (make-instance 'xcb:PropertyNotify))
+        atom window state
+        buffer)
+    (xcb:unmarshal obj data)
+    (setq id (slot-value obj 'window)
+          atom (slot-value obj 'atom)
+          exwm-input--timestamp (slot-value obj 'time)
+          state (slot-value obj 'state))
+    (setq buffer (exwm--id->buffer id))
+    (when (buffer-live-p buffer)
+      (with-current-buffer buffer
+        (cond ((= atom xcb:Atom:_NET_WM_WINDOW_TYPE)
+               (exwm--update-window-type id t))
+              ((= atom xcb:Atom:WM_CLASS)
+               (exwm--update-class id t))
+              ((= atom xcb:Atom:_NET_WM_NAME)
+               (exwm--update-utf8-title id t))
+              ((= atom xcb:Atom:WM_NAME)
+               (exwm--update-ctext-title id t))
+              ((= atom xcb:Atom:WM_TRANSIENT_FOR)
+               (exwm--update-transient-for id t))
+              ((= atom xcb:Atom:WM_NORMAL_HINTS)
+               (exwm--update-normal-hints id t))
+              ((= atom xcb:Atom:WM_HINTS)
+               (exwm--update-hints id t))
+              ((= atom xcb:Atom:WM_PROTOCOLS)
+               (exwm--update-protocols id t))
+              ((= atom xcb:Atom:WM_STATE)
+               (exwm--update-state id t))
+              (t (exwm--log "Unhandled PropertyNotify: %s(%d)"
+                            (x-get-atom-name atom) atom)))))))
+
+(defun exwm--on-ClientMessage (raw-data synthetic)
+  "Handle ClientMessage event."
+  (let ((obj (make-instance 'xcb:ClientMessage))
+        type id data)
+    (xcb:unmarshal obj raw-data)
+    (setq type (slot-value obj 'type)
+          id (slot-value obj 'window)
+          data (slot-value (slot-value obj 'data) 'data32))
+    (cond
+     ;; _NET_WM_MOVERESIZE
+     ((= type xcb:Atom:_NET_WM_MOVERESIZE)
+      (let ((direction (elt data 2))
+            (buffer (exwm--id->buffer id)))
+        (unless (and buffer (with-current-buffer buffer
+                              (not exwm--floating-frame)))
+          (cond ((= direction
+                    xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_KEYBOARD)
+                 ;; FIXME
+                 )
+                ((= direction
+                    xcb:ewmh:_NET_WM_MOVERESIZE_MOVE_KEYBOARD)
+                 ;; FIXME
+                 )
+                ((= direction xcb:ewmh:_NET_WM_MOVERESIZE_CANCEL)
+                 (exwm-floating--stop-moveresize))
+                (t (exwm-floating--start-moveresize id direction))))))
+     ;; _NET_REQUEST_FRAME_EXTENTS
+     ((= type xcb:Atom:_NET_REQUEST_FRAME_EXTENTS)
+      (let ((buffer (exwm--id->buffer id))
+            left right top bottom)
+        (if (or (not buffer)
+                (with-current-buffer buffer
+                  (not exwm--floating-frame)))
+            (setq left 0 right 0 top 0 bottom 0)
+          (setq left exwm-floating-border-width
+                right exwm-floating-border-width
+                top (+ exwm-floating-border-width (window-header-line-height))
+                bottom (+ exwm-floating-border-width
+                          (window-mode-line-height))))
+        (xcb:+request exwm--connection
+            (make-instance 'xcb:ewmh:set-_NET_FRAME_EXTENTS
+                           :window id :left left :right right
+                           :top top :bottom bottom)))
+      (xcb:flush exwm--connection))
+     ;; _NET_WM_STATE
+     ((= type xcb:Atom:_NET_WM_STATE)
+      (let ((action (elt data 0))
+            (props (list (elt data 1) (elt data 2)))
+            (buffer (exwm--id->buffer id))
+            props-new)
+        (when buffer                    ;ensure it's managed
+          (with-current-buffer buffer
+            ;; _NET_WM_STATE_MODAL
+            (when (memq xcb:Atom:_NET_WM_STATE_MODAL props)
+              (cond ((= action xcb:ewmh:_NET_WM_STATE_ADD)
+                     (unless exwm--floating-frame
+                       (exwm-floating--set-floating id))
+                     (push xcb:Atom:_NET_WM_STATE_MODAL props-new))
+                    ((= action xcb:ewmh:_NET_WM_STATE_REMOVE)
+                     (when exwm--floating-frame
+                       (exwm-floating--unset-floating id)))
+                    ((= action xcb:ewmh:_NET_WM_STATE_TOGGLE)
+                     (if exwm--floating-frame
+                         (exwm-floating--unset-floating id)
+                       (exwm-floating--set-floating id)
+                       (push xcb:Atom:_NET_WM_STATE_MODAL props-new)))))
+            ;; _NET_WM_STATE_FULLSCREEN
+            (when (memq xcb:Atom:_NET_WM_STATE_FULLSCREEN props)
+              (cond ((= action xcb:ewmh:_NET_WM_STATE_ADD)
+                     (unless exwm--fullscreen (exwm-layout-set-fullscreen id))
+                     (push xcb:Atom:_NET_WM_STATE_FULLSCREEN props-new))
+                    ((= action xcb:ewmh:_NET_WM_STATE_REMOVE)
+                     (when exwm--fullscreen (exwm-layout-unset-fullscreen id)))
+                    ((= action xcb:ewmh:_NET_WM_STATE_TOGGLE)
+                     (if exwm--fullscreen
+                         (exwm-layout-unset-fullscreen id)
+                       (exwm-layout-set-fullscreen id)
+                       (push xcb:Atom:_NET_WM_STATE_FULLSCREEN props-new)))))
+            ;; _NET_WM_STATE_DEMANDS_ATTENTION
+            ;; FIXME: check (may require other properties set)
+            (when (memq xcb:Atom:_NET_WM_STATE_DEMANDS_ATTENTION props)
+              (when (= action xcb:ewmh:_NET_WM_STATE_ADD)
+                (let ((idx (cl-position exwm--frame exwm-workspace--list)))
+                  (unless (= idx exwm-workspace-current-index)
+                    (set-frame-parameter exwm--frame 'exwm--urgency t)
+                    (exwm-workspace--update-switch-history))))
+              ;; xcb:ewmh:_NET_WM_STATE_REMOVE?
+              ;; xcb:ewmh:_NET_WM_STATE_TOGGLE?
+              )
+            (xcb:+request exwm--connection
+                (make-instance 'xcb:ewmh:set-_NET_WM_STATE
+                               :window id :data (vconcat props-new)))
+            (xcb:flush exwm--connection)))))
+     ((= type xcb:Atom:WM_PROTOCOLS)
+      (let ((type (elt data 0)))
+        (cond ((= type xcb:Atom:_NET_WM_PING)
+               (setq exwm--ping-lock nil))
+              (t (exwm--log "Unhandled WM_PROTOCOLS of type: %d" type)))))
+     (t (exwm--log "Unhandled client message: %s" obj)))))
+
+(defun exwm--init-icccm-ewmh ()
+  "Initialize ICCCM/EWMH support."
+  ;; Handle PropertyNotify event
+  (xcb:+event exwm--connection 'xcb:PropertyNotify 'exwm--on-PropertyNotify)
+  ;; Handle relevant client messages
+  ;; FIXME: WM_STATE client messages (normal => iconic)
+  ;;        WM_COLORMAP_NOTIFY
+  (xcb:+event exwm--connection 'xcb:ClientMessage 'exwm--on-ClientMessage)
+  ;; Set _NET_SUPPORTED
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_SUPPORTED
+                     :window exwm--root
+                     :data (vector xcb:Atom:_NET_SUPPORTED
+                                   xcb:Atom:_NET_NUMBER_OF_DESKTOPS
+                                   xcb:Atom:_NET_DESKTOP_VIEWPORT
+                                   xcb:Atom:_NET_CURRENT_DESKTOP
+                                   xcb:Atom:_NET_WORKAREA
+                                   xcb:Atom:_NET_SUPPORTING_WM_CHECK
+                                   xcb:Atom:_NET_VIRTUAL_ROOTS
+                                   xcb:Atom:_NET_WM_MOVERESIZE
+                                   xcb:Atom:_NET_REQUEST_FRAME_EXTENTS
+                                   xcb:Atom:_NET_FRAME_EXTENTS
+                                   xcb:Atom:_NET_WM_NAME
+                                   ;;
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_TOOLBAR
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_MENU
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_SPLASH
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_DROPDOWN_MENU
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_POPUP_MENU
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_TOOLTIP
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_NOTIFICATION
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_COMBO
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_DND
+                                   xcb:Atom:_NET_WM_WINDOW_TYPE_NORMAL
+                                   ;;
+                                   xcb:Atom:_NET_WM_STATE
+                                   xcb:Atom:_NET_WM_STATE_MODAL
+                                   xcb:Atom:_NET_WM_STATE_FULLSCREEN
+                                   xcb:Atom:_NET_WM_STATE_DEMANDS_ATTENTION
+                                   ;; FIXME: more?
+                                   )))
+  ;; Create a child window for setting _NET_SUPPORTING_WM_CHECK
+  (let ((new-id (xcb:generate-id exwm--connection)))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:CreateWindow
+                       :depth 0 :wid new-id :parent exwm--root
+                       :x -1 :y -1 :width 1 :height 1
+                       :border-width 0 :class xcb:WindowClass:CopyFromParent
+                       :visual 0 :value-mask xcb:CW:OverrideRedirect
+                       :override-redirect 1))
+    (dolist (i (list exwm--root new-id))
+      ;; Set _NET_SUPPORTING_WM_CHECK
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ewmh:set-_NET_SUPPORTING_WM_CHECK
+                         :window i :data new-id))
+      ;; Set _NET_WM_NAME
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ewmh:set-_NET_WM_NAME
+                         :window i :data "EXWM"))))
+  ;; Set _NET_NUMBER_OF_DESKTOPS
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_NUMBER_OF_DESKTOPS
+                     :window exwm--root :data exwm-workspace-number))
+  ;; Set _NET_DESKTOP_VIEWPORT
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_DESKTOP_VIEWPORT
+                     :window exwm--root
+                     :data (make-vector (* 2 exwm-workspace-number) 0)))
+  ;; Set _NET_WORKAREA (with minibuffer and bottom mode-line excluded)
+  (let* ((workareas
+          (vconcat (window-absolute-pixel-edges (get-largest-window t))))
+         (workareas (mapconcat (lambda (i) workareas)
+                               (make-list exwm-workspace-number 0) [])))
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ewmh:set-_NET_WORKAREA
+                       :window exwm--root :data workareas)))
+  ;; Set _NET_VIRTUAL_ROOTS
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_VIRTUAL_ROOTS
+                     :window exwm--root
+                     :data (vconcat (mapcar
+                                     (lambda (i)
+                                       (frame-parameter i 'exwm-window-id))
+                                     exwm-workspace--list))))
+  (xcb:flush exwm--connection))
+
+(defvar exwm-init-hook nil
+  "Normal hook run when EXWM has just finished initialization.")
+
+(defun exwm-init (&optional frame)
+  "Initialize EXWM."
+  (if (not (eq 'x (framep (or frame (selected-frame)))))
+      (exwm--log "Not running under X environment")
+    (unless exwm--connection
+      (setq exwm--connection (xcb:connect-to-socket))
+      (set-process-query-on-exit-flag (slot-value exwm--connection 'process)
+                                      nil) ;prevent query message on exit
+      (setq exwm--root
+            (slot-value (car (slot-value
+                              (xcb:get-setup exwm--connection) 'roots))
+                        'root))
+      (if (xcb:+request-checked+request-check exwm--connection
+              (make-instance 'xcb:ChangeWindowAttributes
+                             :window exwm--root :value-mask xcb:CW:EventMask
+                             :event-mask xcb:EventMask:SubstructureRedirect))
+          ;; Other window manager is running
+          (progn (xcb:disconnect exwm--connection)
+                 (setq exwm--connection nil)
+                 (exwm-enable 'undo)
+                 (exwm--log "Other window manager detected"))
+        ;; Initialize ICCCM/EWMH support
+        ;; (xcb:icccm:init exwm--connection)
+        (xcb:ewmh:init exwm--connection)
+        (exwm--lock)
+        (exwm-workspace--init)
+        (exwm--init-icccm-ewmh)
+        (exwm-layout--init)
+        (exwm-floating--init)
+        (exwm-manage--init)
+        (exwm-input--init)
+        (exwm--unlock)
+        ;; Disable events during new frame creation
+        (add-hook 'before-make-frame-hook 'exwm--lock)
+        (add-hook 'after-make-frame-functions 'exwm--unlock)
+        ;; Manage exiting windows
+        (exwm-manage--scan)
+        (run-hooks 'exwm-init-hook)))))
+
+(defvar exwm-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "\C-ck" 'exwm-input-release-keyboard)
+    (define-key map "\C-cf" 'exwm-layout-set-fullscreen)
+    (define-key map "\C-cm" 'exwm-floating-toggle-floating)
+    (define-key map "\C-cq" 'exwm-input-send-next-key)
+    (define-key map "\C-cv" 'exwm-workspace-move-window)
+    map)
+  "Keymap for `exwm-mode'.")
+
+(define-derived-mode exwm-mode nil "EXWM"
+  "Major mode for managing X windows.
+
+\\{exwm-mode-map}"
+  ;; Internal variables
+  (make-local-variable 'exwm--id)              ;window id
+  (set (make-local-variable 'exwm--frame) nil) ;workspace frame
+  (set (make-local-variable 'exwm--floating-frame) nil) ;floating frame
+  (set (make-local-variable 'exwm--floating-edges) nil) ;four edges
+  (set (make-local-variable 'exwm--fullscreen) nil) ;used in fullscreen
+  (set (make-local-variable 'exwm--floating-frame-geometry) nil) ;in fullscreen
+  (set (make-local-variable 'exwm--fixed-size) nil) ;fixed size
+  ;; Properties
+  (set (make-local-variable 'exwm-window-type) nil)
+  (set (make-local-variable 'exwm--geometry) nil)
+  (set (make-local-variable 'exwm-class-name) nil)
+  (set (make-local-variable 'exwm-instance-name) nil)
+  (set (make-local-variable 'exwm-title) nil)
+  (set (make-local-variable 'exwm--title-is-utf8) nil)
+  (set (make-local-variable 'exwm-transient-for) nil)
+  ;; _NET_WM_NORMAL_HINTS
+  (set (make-local-variable 'exwm--normal-hints-x) nil)
+  (set (make-local-variable 'exwm--normal-hints-y) nil)
+  (set (make-local-variable 'exwm--normal-hints-width) nil)
+  (set (make-local-variable 'exwm--normal-hints-height) nil)
+  (set (make-local-variable 'exwm--normal-hints-min-width) nil)
+  (set (make-local-variable 'exwm--normal-hints-min-height) nil)
+  (set (make-local-variable 'exwm--normal-hints-max-width) nil)
+  (set (make-local-variable 'exwm--normal-hints-max-height) nil)
+  ;; (set (make-local-variable 'exwm--normal-hints-win-gravity) nil)
+  ;; WM_HINTS
+  (set (make-local-variable 'exwm--hints-input) nil) ;FIXME
+  (set (make-local-variable 'exwm--hints-urgency) nil)
+  ;;
+  (set (make-local-variable 'exwm--protocols) nil)
+  (set (make-local-variable 'exwm-state) nil)
+  ;; Change major-mode is not allowed
+  (set (make-local-variable 'change-major-mode-hook) 'kill-buffer)
+  ;;
+  (setq mode-name
+        '(:eval (propertize "EXWM" 'face
+                            (when (cl-some (lambda (i)
+                                             (frame-parameter i
+                                                              'exwm--urgency))
+                                           exwm-workspace--list)
+                              'font-lock-warning-face))))
+  ;; Kill buffer -> close window
+  (set (make-local-variable 'kill-buffer-query-functions)
+       (list (lambda ()
+               (exwm-manage--close-window exwm--id (current-buffer))
+               nil)))
+  (setq buffer-read-only t
+        left-margin-width nil
+        right-margin-width nil
+        left-fringe-width 0
+        right-fringe-width 0
+        vertical-scroll-bar nil))
+
+(defun exwm-enable (&optional undo)
+  "Enable/Disable EXWM"
+  (setq frame-resize-pixelwise t)       ;mandatory; before init
+  (if (eq undo 'undo)
+      (progn (remove-hook 'window-setup-hook 'exwm-init)
+             (remove-hook 'after-make-frame-functions 'exwm-init))
+    (add-hook 'window-setup-hook 'exwm-init t)            ;for Emacs
+    (add-hook 'after-make-frame-functions 'exwm-init t))) ;for Emacs Client
+
+
+
+(provide 'exwm)
+
+;;; exwm.el ends here