initial commit

8 files changed, 2193 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..00ca3ac
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+dwlb
+*.o
+wlr-layer-shell-unstable-v1-protocol.c
+wlr-layer-shell-unstable-v1-protocol.h
+xdg-shell-protocol.c
+xdg-shell-protocol.h
+xdg-output-protocol.c
+xdg-output-protocol.h
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..1ab54b3
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,773 @@
+dwlb - bar for dwl
+
+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.
+
+----
+
+Portions of the code labeled [dzen] are derived from the original dzen2 and
+used under the following license:
+
+MIT/X Consortium License
+
+(C)opyright MMVII Robert Manea <rob dot manea at gmail dot com>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the 
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software. 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+DEALINGS IN THE SOFTWARE.
+
+----
+
+Portions of the code labeled [wlroots] are derived from wlroots and used under
+the following license:
+
+Copyright (c) 2017, 2018 Drew DeVault
+Copyright (c) 2014 Jari Vetoniemi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+----
+
+Portions of the code labeled [swaywm] are derived from sway and are used under
+the following license:
+
+Copyright (c) 2016-2017 Drew DeVault
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+----
+
+Portions of the code labeled [wayland-book] are derived from example code found
+in The Wayland Protocol by Drew DeVault (https://wayland-book.com/).  The book
+is available under CC-BY-SA 4.0, and the author indicates that code examples may
+be used under CC0.
+
+----
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://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 <https://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
+<https://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
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a6de8c8
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,56 @@
+BINS = dwlb
+
+PREFIX ?= /usr/local
+CFLAGS += -Wall -Wextra -Wno-unused-parameter -Wno-format-truncation -g
+
+all: $(BINS)
+
+clean:
+	$(RM) $(BINS) $(addsuffix .o,$(BINS))
+
+install: all
+	install -D -t $(PREFIX)/bin $(BINS)
+
+WAYLAND_PROTOCOLS=$(shell pkg-config --variable=pkgdatadir wayland-protocols)
+WAYLAND_SCANNER=$(shell pkg-config --variable=wayland_scanner wayland-scanner)
+
+xdg-shell-protocol.h:
+	$(WAYLAND_SCANNER) client-header \
+		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
+
+xdg-shell-protocol.c:
+	$(WAYLAND_SCANNER) private-code \
+		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
+
+xdg-shell-protocol.o: xdg-shell-protocol.h
+
+xdg-output-protocol.h:
+	$(WAYLAND_SCANNER) client-header \
+		$(WAYLAND_PROTOCOLS)/unstable/xdg-output/xdg-output-unstable-v1.xml $@
+
+xdg-output-protocol.c:
+	$(WAYLAND_SCANNER) private-code \
+		$(WAYLAND_PROTOCOLS)/unstable/xdg-output/xdg-output-unstable-v1.xml $@
+
+xdg-output-protocol.o: xdg-output-protocol.h
+
+wlr-layer-shell-unstable-v1-protocol.h:
+	$(WAYLAND_SCANNER) client-header \
+		protocols/wlr-layer-shell-unstable-v1.xml $@
+
+wlr-layer-shell-unstable-v1-protocol.c:
+	$(WAYLAND_SCANNER) private-code \
+		protocols/wlr-layer-shell-unstable-v1.xml $@
+
+wlr-layer-shell-unstable-v1-protocol.o: wlr-layer-shell-unstable-v1-protocol.h
+
+dwlb.o: utf8.h xdg-shell-protocol.h xdg-output-protocol.h wlr-layer-shell-unstable-v1-protocol.h
+
+# Protocol dependencies
+dwlb: xdg-shell-protocol.o xdg-output-protocol.o wlr-layer-shell-unstable-v1-protocol.o
+
+# Library dependencies
+dwlb: CFLAGS+=$(shell pkg-config --cflags wayland-client fcft pixman-1)
+dwlb: LDLIBS+=$(shell pkg-config --libs wayland-client fcft pixman-1) -lrt
+
+.PHONY: all clean install
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7e00f2c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# dwlb
+
+![screenshot](/screenshot.png "screenshot")
+
+dwlb is a simple bar for [dwl](https://github.com/djpohly/dwl). It is a modified version of [dtao](https://github.com/djpohly/dtao).
+
+## Installation
+```bash
+git clone https://github.com/kolunmi/dwlb
+cd dwlb
+make install
+```
+
+## Usage
+```bash
+dwl -s dwlb
+```
+
+## Status Text
+The `-status` option sends status text to existing instances of dwlb. This takes two arguments: a zxdg_output_v1 name (alternatively "all" to affect all outputs or "selected" for the current output) and the text itself.
+
+## Other Options
+Run `dwlb -h` for a full list of options.
diff --git a/dwlb.c b/dwlb.c
new file mode 100644
index 0000000..43817d1
--- /dev/null
+++ b/dwlb.c
@@ -0,0 +1,888 @@
+#define _GNU_SOURCE
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcft/fcft.h>
+#include <fcntl.h>
+#include <pixman-1/pixman.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <utlist.h>
+#include <wayland-client.h>
+
+#include "utf8.h"
+#include "wlr-layer-shell-unstable-v1-protocol.h"
+#include "xdg-shell-protocol.h"
+#include "xdg-output-protocol.h"
+
+#define DIE(fmt, ...)						\
+	do {							\
+		fprintf(stderr, fmt "\n", ##__VA_ARGS__);	\
+		exit(1);					\
+	} while (0)
+
+#define EDIE(fmt, ...)						\
+	DIE(fmt ": %s", ##__VA_ARGS__, strerror(errno));
+
+#define CLEANUP_DIE(why)			\
+	do {					\
+		cleanup();			\
+		DIE(why);			\
+	} while(0)
+
+#define CLEANUP_EDIE(why)			\
+	do {					\
+		cleanup();			\
+		EDIE(why);			\
+	} while(0)
+
+#define MIN(a, b)				\
+	((a) < (b) ? (a) : (b))
+#define MAX(a, b)				\
+	((a) > (b) ? (a) : (b))
+
+#define PROGRAM "dwlb"
+#define VERSION "0.1"
+#define USAGE \
+	"usage: dwlb [OPTIONS]\n"					\
+	"	-status	[OUTPUT] [TEXT]		send status text to dwlb\n" \
+	"	-hide-vacant-tags		do not display empty and inactive tags\n" \
+	"	-font [FONT]			specify a font\n"	\
+	"	-text-color [COLOR]		specify text color\n"	\
+	"	-active-color [COLOR]		specify color to indicate active tags or monitors\n" \
+	"	-inactive-color [COLOR]		specify color to indicate inactive tags or monitors\n" \
+	"	-urg-text-color [COLOR]		specify text color on urgent tags\n" \
+	"	-urg-bg-color [COLOR]		specify color of urgent tags\n"	\
+	"	-v				get version information\n" \
+	"	-h				view this help text\n"
+
+typedef struct Bar Bar;
+struct Bar {
+	struct zxdg_output_v1 *xdg_output;
+	struct wl_output *wl_output;
+	struct wl_surface *wl_surface;
+	struct zwlr_layer_surface_v1 *layer_surface;
+
+	uint32_t registry_name;
+	char *xdg_output_name;
+	
+	uint32_t width;
+	uint32_t height;
+	uint32_t textpadding;
+	uint32_t stride;
+	uint32_t bufsize;
+	
+	uint32_t mtags;
+	uint32_t ctags;
+	uint32_t urg;
+	int selmon;
+	char *layout;
+	char *title;
+	char status[256];
+
+	bool redraw;
+
+	Bar *prev, *next;
+};
+
+static int sock_fd;
+static char socketdir[256];
+static char *socketpath = NULL;
+static char sockbuf[512];
+static char stdinbuf[BUFSIZ];
+
+static struct wl_display *display;
+static struct wl_compositor *compositor;
+static struct wl_shm *shm;
+static struct zwlr_layer_shell_v1 *layer_shell;
+static struct zxdg_output_manager_v1 *output_manager;
+
+static uint32_t height;
+static uint32_t textpadding;
+
+static bool run_display = true;
+static bool ready = false;
+static bool hide_vacant = false;
+static Bar *bars = NULL;
+
+static char *tags[9] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
+static struct fcft_font *font;
+static pixman_color_t activecolor = { .red = 0x0000, .green = 0x5555, .blue = 0x7777, .alpha = 0xffff, };
+static pixman_color_t inactivecolor = { .red = 0x2222, .green = 0x2222, .blue = 0x2222, .alpha = 0xffff, };
+static pixman_color_t textcolor = { .red = 0xeeee, .green = 0xeeee, .blue = 0xeeee, .alpha = 0xffff, };
+static pixman_color_t urgbgcolor = { .red = 0xeeee, .green = 0xeeee, .blue = 0xeeee, .alpha = 0xffff, };
+static pixman_color_t urgtextcolor = { .red = 2222, .green = 0x2222, .blue = 0x2222, .alpha = 0xffff, };
+
+static void
+wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
+{
+	/* Sent by the compositor when it's no longer using this buffer */
+	wl_buffer_destroy(wl_buffer);
+}
+
+static const struct wl_buffer_listener wl_buffer_listener = {
+	.release = wl_buffer_release,
+};
+
+/* Shared memory support function adapted from [wayland-book] */
+static int
+allocate_shm_file(size_t size)
+{
+	int fd = memfd_create("surface", MFD_CLOEXEC);
+	if (fd < 0)
+		return -1;
+	int ret;
+	do {
+		ret = ftruncate(fd, size);
+	} while (ret < 0 && errno == EINTR);
+	if (ret < 0) {
+		close(fd);
+		return -1;
+	}
+	return fd;
+}
+
+static uint32_t
+draw_text(char *text,
+	  uint32_t xpos,
+	  uint32_t ypos,
+	  pixman_image_t *foreground,
+	  pixman_image_t *background,
+	  pixman_color_t *fgcolor,
+	  pixman_color_t *bgcolor,
+	  uint32_t height,
+	  uint32_t padding)
+{
+	uint32_t codepoint;
+	uint32_t state = UTF8_ACCEPT;
+	uint32_t ixpos = xpos;
+	uint32_t lastcp = 0;
+	pixman_image_t *fgfill = pixman_image_create_solid_fill(fgcolor);
+	
+	if (!*text)
+		return 0;
+	
+	xpos += padding;
+	
+	for (char *p = text; *p; p++) {
+		/* Returns nonzero if more bytes are needed */
+		if (utf8decode(&state, &codepoint, *p))
+			continue;
+
+		/* Turn off subpixel rendering, which complicates things when
+		 * mixed with alpha channels */
+		const struct fcft_glyph *glyph = fcft_rasterize_char_utf32(font, codepoint, FCFT_SUBPIXEL_NONE);
+		if (!glyph)
+			continue;
+
+		/* Adjust x position based on kerning with previous glyph */
+		long x_kern = 0;
+		if (lastcp)
+			fcft_kerning(font, lastcp, codepoint, &x_kern, NULL);
+		xpos += x_kern;
+		lastcp = codepoint;
+
+		/* Detect and handle pre-rendered glyphs (e.g. emoji) */
+		if (pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8) {
+			/* Only the alpha channel of the mask is used, so we can
+			 * use fgfill here to blend prerendered glyphs with the
+			 * same opacity */
+			pixman_image_composite32(
+				PIXMAN_OP_OVER, glyph->pix, fgfill, foreground, 0, 0, 0, 0,
+				xpos + glyph->x, ypos - glyph->y, glyph->width, glyph->height);
+		} else {
+			/* Applying the foreground color here would mess up
+			 * component alphas for subpixel-rendered text, so we
+			 * apply it when blending. */
+			pixman_image_composite32(
+				PIXMAN_OP_OVER, fgfill, glyph->pix, foreground, 0, 0, 0, 0,
+				xpos + glyph->x, ypos - glyph->y, glyph->width, glyph->height);
+		}
+
+		/* increment pen position */
+		xpos += glyph->advance.x;
+		ypos += glyph->advance.y;
+	}
+
+	if (state != UTF8_ACCEPT)
+		fprintf(stderr, "malformed UTF-8 sequence\n");
+	
+	xpos += padding;
+
+	if (background && bgcolor)
+		pixman_image_fill_boxes(PIXMAN_OP_OVER, background,
+					bgcolor, 1, &(pixman_box32_t){
+						.x1 = ixpos,
+						.x2 = xpos,
+						.y1 = 0,
+						.y2 = height
+					});
+
+	pixman_image_unref(fgfill);
+
+	return xpos;
+}
+
+static int
+draw_frame(Bar *b)
+{
+	/* Allocate buffer to be attached to the surface */
+        int fd = allocate_shm_file(b->bufsize);
+	if (fd == -1)
+		return -1;
+
+	uint32_t *data = mmap(NULL, b->bufsize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (data == MAP_FAILED) {
+		close(fd);
+		return -1;
+	}
+
+	struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, b->bufsize);
+	struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0, b->width, b->height, b->stride, WL_SHM_FORMAT_ARGB8888);
+	wl_buffer_add_listener(buffer, &wl_buffer_listener, NULL);
+	wl_shm_pool_destroy(pool);
+	close(fd);
+
+	/* Pixman image corresponding to main buffer */
+	pixman_image_t *bar = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, data, b->width * 4);
+	
+	/* Fill bar with background color */
+	pixman_image_fill_boxes(PIXMAN_OP_SRC, bar, b->selmon ? &activecolor : &inactivecolor, 1,
+				&(pixman_box32_t) {.x1 = 0, .x2 = b->width, .y1 = 0, .y2 = b->height});
+	
+	/* Text background and foreground layers */
+	pixman_image_t *background_left = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, NULL, b->width * 4);
+	pixman_image_t *foreground_left = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, NULL, b->width * 4);
+	pixman_image_t *background_right = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, NULL, b->width * 4);
+	pixman_image_t *foreground_right = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, NULL, b->width * 4);
+	pixman_image_t *foreground_title = pixman_image_create_bits(PIXMAN_a8r8g8b8, b->width, b->height, NULL, b->width * 4);
+	
+	/* Draw on images */
+	uint32_t xpos_left = 0;
+	uint32_t xpos_right;
+	uint32_t ypos = (b->height + font->ascent - font->descent) / 2;
+	
+	uint32_t boxs = font->height / 9;
+	uint32_t boxw = font->height / 6 + 2;
+
+	for (uint32_t i = 0; i < 9; i++) {
+		bool active = b->mtags & 1 << i;
+		bool occupied = b->ctags & 1 << i;
+		bool urgent = b->urg & 1 << i;
+
+		if (hide_vacant && !active && !occupied && !urgent)
+			continue;
+		
+		if (!hide_vacant && occupied)
+			pixman_image_fill_boxes(PIXMAN_OP_SRC, foreground_left,
+						&textcolor, 1, &(pixman_box32_t){
+							.x1 = xpos_left + boxs,
+							.x2 = xpos_left + boxs + boxw,
+							.y1 = boxs,
+							.y2 = boxs + boxw
+						});
+		
+		if (urgent)
+			xpos_left = draw_text(tags[i], xpos_left, ypos, foreground_left, background_left,
+					      &urgtextcolor, &urgbgcolor, b->height, b->textpadding);
+		else
+			xpos_left = draw_text(tags[i], xpos_left, ypos, foreground_left, background_left,
+					      &textcolor, active ? &activecolor : &inactivecolor, b->height, b->textpadding);
+	}
+	xpos_left = draw_text(b->layout, xpos_left, ypos, foreground_left, background_left,
+			      &textcolor, &inactivecolor, b->height, b->textpadding);
+
+	xpos_right = draw_text(b->status, 0, ypos, foreground_right, background_right,
+			       &textcolor, &inactivecolor, b->height, b->textpadding);
+	if (xpos_right > b->width)
+		xpos_right = b->width;
+	
+	draw_text(b->title, 0, ypos, foreground_title, NULL,
+		  &textcolor, NULL, b->height, b->textpadding);
+	
+	/* Draw background and foreground on bar */
+	pixman_image_composite32(PIXMAN_OP_OVER, foreground_title, NULL, bar, 0, 0, 0, 0, xpos_left, 0, b->width, b->height);
+	pixman_image_composite32(PIXMAN_OP_OVER, background_right, NULL, bar, 0, 0, 0, 0, b->width - xpos_right, 0, b->width, b->height);
+	pixman_image_composite32(PIXMAN_OP_OVER, foreground_right, NULL, bar, 0, 0, 0, 0, b->width - xpos_right, 0, b->width, b->height);
+	pixman_image_composite32(PIXMAN_OP_OVER, background_left, NULL, bar, 0, 0, 0, 0, 0, 0, b->width, b->height);
+	pixman_image_composite32(PIXMAN_OP_OVER, foreground_left, NULL, bar, 0, 0, 0, 0, 0, 0, b->width, b->height);
+
+	pixman_image_unref(foreground_left);
+	pixman_image_unref(background_left);
+	pixman_image_unref(foreground_right);
+	pixman_image_unref(background_right);
+	pixman_image_unref(foreground_title);
+	pixman_image_unref(bar);
+	
+	munmap(data, b->bufsize);
+
+	wl_surface_attach(b->wl_surface, buffer, 0, 0);
+	wl_surface_damage_buffer(b->wl_surface, 0, 0, b->width, b->height);
+	wl_surface_commit(b->wl_surface);
+
+	return 0;
+}
+
+/* Layer-surface setup adapted from layer-shell example in [wlroots] */
+static void
+layer_surface_configure(void *data, struct zwlr_layer_surface_v1 *surface,
+			uint32_t serial, uint32_t w, uint32_t h)
+{
+	Bar *b = (Bar *)data;
+	
+	b->width = w;
+	b->height = h;
+	b->stride = b->width * 4;
+	b->bufsize = b->stride * b->height;
+
+	zwlr_layer_surface_v1_set_exclusive_zone(b->layer_surface, b->height);
+	zwlr_layer_surface_v1_ack_configure(surface, serial);
+
+	draw_frame(b);
+}
+
+static void
+layer_surface_closed(void *data, struct zwlr_layer_surface_v1 *surface)
+{
+	Bar *b = (Bar *)data;
+	
+	zwlr_layer_surface_v1_destroy(surface);
+	wl_surface_destroy(b->wl_surface);
+	run_display = false;
+}
+
+static void
+cleanup(void)
+{
+	if (socketpath)
+		unlink(socketpath);
+}
+
+static struct zwlr_layer_surface_v1_listener layer_surface_listener = {
+	.configure = layer_surface_configure,
+	.closed = layer_surface_closed,
+};
+
+static void
+output_name(void *data, struct zxdg_output_v1 *xdg_output, const char *name)
+{
+	Bar *b = (Bar *)data;
+	
+	/* Is this necessary? */
+	if (b->xdg_output_name)
+		free(b->xdg_output_name);
+	if (!(b->xdg_output_name = strdup(name)))
+		CLEANUP_EDIE("strdup");
+}
+
+static void
+output_logical_position(void *data, struct zxdg_output_v1 *xdg_output,
+			int32_t x, int32_t y)
+{
+}
+
+static void
+output_logical_size(void *data, struct zxdg_output_v1 *xdg_output,
+		    int32_t width, int32_t height)
+{
+}
+
+static void
+output_done(void *data, struct zxdg_output_v1 *xdg_output)
+{
+}
+
+static void
+output_description(void *data, struct zxdg_output_v1 *xdg_output,
+		   const char *description)
+{
+}
+
+static struct zxdg_output_v1_listener output_listener = {
+	.name = output_name,
+	.description = output_description,
+	.done = output_done,
+	.logical_position = output_logical_position,
+	.logical_size = output_logical_size
+};
+
+static void
+setup_bar(Bar *b)
+{
+	b->height = height;
+	b->textpadding = textpadding;
+		
+	b->layout = "[]=";
+	b->title = "";
+		
+	b->xdg_output = zxdg_output_manager_v1_get_xdg_output(output_manager, b->wl_output);
+	if (!b->xdg_output)
+		CLEANUP_DIE("Could not create xdg_output");
+	zxdg_output_v1_add_listener(b->xdg_output, &output_listener, b);
+		
+	b->wl_surface = wl_compositor_create_surface(compositor);
+	if (!b->wl_surface)
+		CLEANUP_DIE("Could not create wl_surface");
+
+	b->layer_surface = zwlr_layer_shell_v1_get_layer_surface(layer_shell, b->wl_surface, b->wl_output,
+								 ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, PROGRAM);
+	if (!b->layer_surface)
+		CLEANUP_DIE("Could not create layer_surface");
+	zwlr_layer_surface_v1_add_listener(b->layer_surface, &layer_surface_listener, b);
+
+	zwlr_layer_surface_v1_set_size(b->layer_surface, 0, b->height);
+	zwlr_layer_surface_v1_set_anchor(b->layer_surface,
+					 ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
+					 | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+					 | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
+	wl_surface_commit(b->wl_surface);
+}
+
+static void
+handle_global(void *data, struct wl_registry *registry,
+	      uint32_t name, const char *interface, uint32_t version)
+{
+	if (strcmp(interface, wl_compositor_interface.name) == 0) {
+		compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 4);
+	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
+		shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
+	} else if (strcmp(interface, wl_output_interface.name) == 0) {
+		Bar *b = malloc(sizeof(Bar));
+		if (!b)
+			CLEANUP_EDIE("malloc");
+		memset(b, 0, sizeof(Bar));
+		b->registry_name = name;
+		b->wl_output = wl_registry_bind(registry, name, &wl_output_interface, 1);
+		DL_APPEND(bars, b);
+		if (ready)
+			setup_bar(b);
+	} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
+		layer_shell = wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, 1);
+	} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
+		output_manager = wl_registry_bind(registry, name, &zxdg_output_manager_v1_interface, 2);
+	}
+}
+
+static void
+teardown_bar(Bar *b)
+{
+	zxdg_output_v1_destroy(b->xdg_output);
+	wl_surface_destroy(b->wl_surface);
+	zwlr_layer_surface_v1_destroy(b->layer_surface);
+	if (b->xdg_output_name)
+		free(b->xdg_output_name);
+	free(b);
+}
+
+static void
+handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
+{
+	Bar *b;
+	DL_FOREACH(bars, b)
+		if (b->registry_name == name)
+			break;
+	
+	if (!b)
+		return;
+	
+	DL_DELETE(bars, b);
+	teardown_bar(b);
+}
+
+
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove
+};
+
+static int
+advance_word(char **beg, char **end)
+{
+	for (*beg = *end; **beg == ' '; (*beg)++);
+	for (*end = *beg; **end && **end != ' '; (*end)++);
+	if (!**end)
+		/* last word */
+		return -1;
+	**end = '\0';
+	(*end)++;
+	return 0;
+}
+
+#define ADVANCE() advance_word(&wordbeg, &wordend)
+#define ADVANCE_IF_LAST_CONT() if (ADVANCE() == -1) continue
+#define ADVANCE_IF_LAST_BREAK() if (ADVANCE() == -1) break
+
+static void
+read_stdin(void)
+{
+	ssize_t len = read(STDIN_FILENO, stdinbuf, sizeof stdinbuf);
+	if (len == -1)
+		CLEANUP_EDIE("read");
+	if (len == 0) {
+		run_display = 0;
+		return;
+	}
+
+	char *end = (char *)&stdinbuf + len;
+	char *linebeg, *lineend;
+	char *wordbeg, *wordend;
+	
+	for (linebeg = (char *)&stdinbuf;
+	     (lineend = memchr(linebeg, '\n', end - linebeg));
+	     linebeg = lineend) {
+		*lineend++ = '\0';
+		wordend = linebeg;
+
+		ADVANCE_IF_LAST_CONT();
+
+		Bar *b;
+		DL_FOREACH(bars, b)
+			if (b->xdg_output_name)
+				if (!strcmp(wordbeg, b->xdg_output_name))
+					break;
+		if (!b)
+			continue;
+		
+		ADVANCE_IF_LAST_CONT();
+		
+		if (!strcmp(wordbeg, "tags")) {
+			ADVANCE_IF_LAST_CONT();
+			b->ctags = atoi(wordbeg);
+			ADVANCE_IF_LAST_CONT();
+			b->mtags = atoi(wordbeg);
+			ADVANCE_IF_LAST_CONT();
+			/* skip sel */
+			ADVANCE();
+			b->urg = atoi(wordbeg);
+			b->redraw = true;
+		} else if (!strcmp(wordbeg, "layout")) {
+			b->layout = wordend;
+			b->redraw = true;
+		} else if (!strcmp(wordbeg, "title")) {
+			b->title = wordend;
+			b->redraw = true;
+		} else if (!strcmp(wordbeg, "selmon")) {
+			ADVANCE();
+			b->selmon = atoi(wordbeg);
+			b->redraw = true;
+		}
+	}
+}
+
+static void
+read_socket(void)
+{
+	int cli_fd;
+	if ((cli_fd = accept(sock_fd, NULL, 0)) == -1)
+		CLEANUP_EDIE("accept");
+	ssize_t len = recv(cli_fd, sockbuf, sizeof sockbuf - 1, 0);
+	if (len == -1)
+		CLEANUP_EDIE("recv");
+	close(cli_fd);
+	if (len == 0)
+		return;
+	sockbuf[len] = '\0';
+
+	do {
+		char *wordbeg, *wordend;
+		wordend = (char *)&sockbuf;
+
+		ADVANCE_IF_LAST_BREAK();
+		
+		Bar *b;
+		bool all = false;
+		
+		if (!strcmp(wordbeg, "all")) {
+			all = true;
+		} else if (!strcmp(wordbeg, "selected")) {
+			DL_FOREACH(bars, b)
+				if (b->selmon)
+					break;
+		} else {
+			DL_FOREACH(bars, b)
+				if (b->xdg_output_name)
+					if (!strcmp(wordbeg, b->xdg_output_name))
+						break;
+		}
+		
+		if (!all && !b)
+			break;
+
+		ADVANCE_IF_LAST_BREAK();
+
+		if (!strcmp(wordbeg, "status")) {
+			if (all) {
+				DL_FOREACH(bars, b) {
+					snprintf(b->status, sizeof b->status, "%s", wordend);
+					b->redraw = true;
+				}
+			} else {
+				snprintf(b->status, sizeof b->status, "%s", wordend);
+				b->redraw = true;
+			}
+		}
+	} while (0);
+}
+
+static void
+event_loop(void)
+{
+	int wl_fd = wl_display_get_fd(display);
+
+	while (run_display) {
+		fd_set rfds;
+		FD_ZERO(&rfds);
+		FD_SET(STDIN_FILENO, &rfds);
+		FD_SET(sock_fd, &rfds);
+		FD_SET(wl_fd, &rfds);
+
+		/* Does this need to be inside the loop? */
+		wl_display_flush(display);
+
+		if (select(MAX(sock_fd, wl_fd) + 1, &rfds, NULL, NULL, NULL) == -1)
+			continue;
+
+		if (FD_ISSET(STDIN_FILENO, &rfds))
+			read_stdin();
+
+		if (FD_ISSET(sock_fd, &rfds))
+			read_socket();
+		
+		if (FD_ISSET(wl_fd, &rfds))
+			if (wl_display_dispatch(display) == -1)
+				break;
+
+		Bar *b;
+		DL_FOREACH(bars, b) {
+			if (b->redraw) {
+				draw_frame(b);
+				b->redraw = false;
+			}
+		}
+	}
+}
+
+static void
+client_send_command(struct sockaddr_un *sock_address,
+		    const char *output,
+		    const char *cmd,
+		    const char *data)
+{
+	DIR *dir;
+	if (!(dir = opendir(socketdir)))
+		EDIE("Could not open directory '%s'", socketdir);
+
+	if (data)
+		snprintf(sockbuf, sizeof sockbuf, "%s %s %s", output, cmd, data);
+	else
+		snprintf(sockbuf, sizeof sockbuf, "%s %s", output, cmd);
+	
+	size_t len = strlen(sockbuf);
+			
+	struct dirent *de;
+	bool newfd = true;
+	while ((de = readdir(dir))) {
+		if (!strncmp(de->d_name, "dwlb-", 5)) {
+			if (newfd)
+				if ((sock_fd = socket(AF_UNIX, SOCK_STREAM, 1)) == -1)
+					EDIE("socket");
+			snprintf(sock_address->sun_path, sizeof sock_address->sun_path, "%s/%s", socketdir, de->d_name);
+			if (connect(sock_fd, (struct sockaddr *) sock_address, sizeof(*sock_address)) == -1) {
+				newfd = false;
+				continue;
+			}
+					
+			if (send(sock_fd, sockbuf, len, 0) == -1)
+				fprintf(stderr, "Could not send status data to '%s'\n", sock_address->sun_path);
+			close(sock_fd);
+			newfd = true;
+		}
+	}
+			
+	closedir(dir);
+}
+
+/* Color parsing logic adapted from [sway] */
+static int
+parse_color(const char *str, pixman_color_t *clr)
+{
+	if (*str == '#')
+		str++;
+	int len = strlen(str);
+
+	// Disallows "0x" prefix that strtoul would ignore
+	if ((len != 6 && len != 8) || !isxdigit(str[0]) || !isxdigit(str[1]))
+		return -1;
+
+	char *ptr;
+	uint32_t parsed = strtoul(str, &ptr, 16);
+	if (*ptr)
+		return -1;
+
+	if (len == 8) {
+		clr->alpha = (parsed & 0xff) * 0x101;
+		parsed >>= 8;
+	} else {
+		clr->alpha = 0xffff;
+	}
+	clr->red =   ((parsed >> 16) & 0xff) * 0x101;
+	clr->green = ((parsed >>  8) & 0xff) * 0x101;
+	clr->blue =  ((parsed >>  0) & 0xff) * 0x101;
+	return 0;
+}
+
+void
+sig_handler(int sig)
+{
+	if (sig == SIGINT || sig == SIGHUP || sig == SIGTERM)
+		run_display = false;
+}
+
+int
+main(int argc, char **argv)
+{
+	char *fontstr = "";
+	char *xdgruntimedir;
+	struct sockaddr_un sock_address;
+
+	/* Establish socket directory */
+	if (!(xdgruntimedir = getenv("XDG_RUNTIME_DIR")))
+		DIE("Could not retrieve XDG_RUNTIME_DIR");
+	snprintf(socketdir, sizeof socketdir, "%s/dwlb", xdgruntimedir);
+	if (mkdir(socketdir, S_IRWXU) == -1)
+		if (errno != EEXIST)
+			EDIE("Could not create directory '%s'", socketdir);
+	sock_address.sun_family = AF_UNIX;
+
+	/* Parse options */
+	for (int i = 1; i < argc; i++) {
+		if (!strcmp(argv[i], "-status")) {
+			if (++i + 1 >= argc)
+				DIE("Option -status requires two arguments");
+			client_send_command(&sock_address, argv[i], "status", argv[i + 1]);
+			return 0;
+		} else if (!strcmp(argv[i], "-hide-vacant-tags")) {
+			hide_vacant = true;
+		} else if (!strcmp(argv[i], "-font")) {
+			if (++i >= argc)
+				DIE("Option -font requires an argument");
+			fontstr = argv[i];
+		} else if (!strcmp(argv[i], "-text-color")) {
+			if (++i >= argc)
+				DIE("Option -text-color requires an argument");
+			if (parse_color(argv[i], &textcolor) == -1)
+				DIE("malformed color string");
+		} else if (!strcmp(argv[i], "-active-color")) {
+			if (++i >= argc)
+				DIE("Option -active-color requires an argument");
+			if (parse_color(argv[i], &activecolor) == -1)
+				DIE("malformed color string");
+		} else if (!strcmp(argv[i], "-inactive-color")) {
+			if (++i >= argc)
+				DIE("Option -inactive-color requires an argument");
+			if (parse_color(argv[i], &inactivecolor) == -1)
+				DIE("malformed color string");
+		} else if (!strcmp(argv[i], "-urg-text-color")) {
+			if (++i >= argc)
+				DIE("Option -urg-text-color requires an argument");
+			if (parse_color(argv[i], &urgtextcolor) == -1)
+				DIE("malformed color string");
+		} else if (!strcmp(argv[i], "-urg-bg-color")) {
+			if (++i >= argc)
+				DIE("Option -urg-bg-color requires an argument");
+			if (parse_color(argv[i], &urgbgcolor) == -1)
+				DIE("malformed color string");
+		} else if (!strcmp(argv[i], "-v")) {
+			fprintf(stderr, PROGRAM " " VERSION "\n");
+			return 0;
+		} else if (!strcmp(argv[i], "-h")) {
+			fprintf(stderr, USAGE);
+			return 0;
+		} else {
+			DIE("Option '%s' not recognized\n" USAGE, argv[i]);
+		}
+	}
+
+	/* Set up display and protocols */
+	display = wl_display_connect(NULL);
+	if (!display)
+		DIE("Failed to create display");
+
+	struct wl_registry *registry = wl_display_get_registry(display);
+	wl_registry_add_listener(registry, &registry_listener, NULL);
+	wl_display_roundtrip(display);
+	if (!compositor || !shm || !layer_shell || !output_manager)
+		DIE("Compositor does not support all needed protocols");
+
+	/* Load selected font */
+	fcft_init(FCFT_LOG_COLORIZE_AUTO, 0, FCFT_LOG_CLASS_ERROR);
+	fcft_set_scaling_filter(FCFT_SCALING_FILTER_LANCZOS3);
+	font = fcft_from_name(1, (const char *[]) {fontstr}, NULL);
+	if (!font)
+		DIE("Could not load font");
+	textpadding = font->height / 2;
+	height = font->ascent + font->descent;
+	
+	/* Setup bars */
+	Bar *b;
+	DL_FOREACH(bars, b)
+		setup_bar(b);
+	wl_display_roundtrip(display);
+	
+	/* Set up socket */
+	for (uint32_t i = 0;; i++) {
+		if ((sock_fd = socket(AF_UNIX, SOCK_STREAM, 1)) == -1)
+			DIE("socket");
+		snprintf(sock_address.sun_path, sizeof sock_address.sun_path, "%s/dwlb-%i", socketdir, i);
+		if (connect(sock_fd, (struct sockaddr *) &sock_address, sizeof sock_address) == -1)
+			break;
+		close(sock_fd);
+	}
+
+	socketpath = (char *)&sock_address.sun_path;
+	unlink(socketpath);
+	if (bind(sock_fd, (struct sockaddr *) &sock_address, sizeof sock_address) == -1)
+		CLEANUP_EDIE("bind");
+	if (listen(sock_fd, SOMAXCONN) == -1)
+		CLEANUP_EDIE("listen");
+	fcntl(sock_fd, F_SETFD, FD_CLOEXEC | fcntl(sock_fd, F_GETFD));
+	
+	/* Set up signals */
+	signal(SIGINT, sig_handler);
+	signal(SIGHUP, sig_handler);
+	signal(SIGTERM, sig_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	/* Run */
+	ready = true;
+	event_loop();
+
+	/* Clean everything up */
+	close(sock_fd);
+	unlink(socketpath);
+	
+	zwlr_layer_shell_v1_destroy(layer_shell);
+	zxdg_output_manager_v1_destroy(output_manager);
+	
+	Bar *t;
+	DL_FOREACH_SAFE(bars, b, t)
+		teardown_bar(b);
+	
+	fcft_destroy(font);
+	fcft_fini();
+	
+	wl_shm_destroy(shm);
+	wl_compositor_destroy(compositor);
+	wl_registry_destroy(registry);
+	wl_display_disconnect(display);
+
+	return 0;
+}
diff --git a/protocols/wlr-layer-shell-unstable-v1.xml b/protocols/wlr-layer-shell-unstable-v1.xml
new file mode 100644
index 0000000..d62fd51
--- /dev/null
+++ b/protocols/wlr-layer-shell-unstable-v1.xml
@@ -0,0 +1,390 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_layer_shell_unstable_v1">
+  <copyright>
+    Copyright © 2017 Drew DeVault
+
+    Permission to use, copy, modify, distribute, and sell this
+    software and its documentation for any purpose is hereby granted
+    without fee, provided that the above copyright notice appear in
+    all copies and that both that copyright notice and this permission
+    notice appear in supporting documentation, and that the name of
+    the copyright holders not be used in advertising or publicity
+    pertaining to distribution of the software without specific,
+    written prior permission.  The copyright holders make no
+    representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied
+    warranty.
+
+    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+    THIS SOFTWARE.
+  </copyright>
+
+  <interface name="zwlr_layer_shell_v1" version="4">
+    <description summary="create surfaces that are layers of the desktop">
+      Clients can use this interface to assign the surface_layer role to
+      wl_surfaces. Such surfaces are assigned to a "layer" of the output and
+      rendered with a defined z-depth respective to each other. They may also be
+      anchored to the edges and corners of a screen and specify input handling
+      semantics. This interface should be suitable for the implementation of
+      many desktop shell components, and a broad number of other applications
+      that interact with the desktop.
+    </description>
+
+    <request name="get_layer_surface">
+      <description summary="create a layer_surface from a surface">
+        Create a layer surface for an existing surface. This assigns the role of
+        layer_surface, or raises a protocol error if another role is already
+        assigned.
+
+        Creating a layer surface from a wl_surface which has a buffer attached
+        or committed is a client error, and any attempts by a client to attach
+        or manipulate a buffer prior to the first layer_surface.configure call
+        must also be treated as errors.
+
+        After creating a layer_surface object and setting it up, the client
+        must perform an initial commit without any buffer attached.
+        The compositor will reply with a layer_surface.configure event.
+        The client must acknowledge it and is then allowed to attach a buffer
+        to map the surface.
+
+        You may pass NULL for output to allow the compositor to decide which
+        output to use. Generally this will be the one that the user most
+        recently interacted with.
+
+        Clients can specify a namespace that defines the purpose of the layer
+        surface.
+      </description>
+      <arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+      <arg name="output" type="object" interface="wl_output" allow-null="true"/>
+      <arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
+      <arg name="namespace" type="string" summary="namespace for the layer surface"/>
+    </request>
+
+    <enum name="error">
+      <entry name="role" value="0" summary="wl_surface has another role"/>
+      <entry name="invalid_layer" value="1" summary="layer value is invalid"/>
+      <entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
+    </enum>
+
+    <enum name="layer">
+      <description summary="available layers for surfaces">
+        These values indicate which layers a surface can be rendered in. They
+        are ordered by z depth, bottom-most first. Traditional shell surfaces
+        will typically be rendered between the bottom and top layers.
+        Fullscreen shell surfaces are typically rendered at the top layer.
+        Multiple surfaces can share a single layer, and ordering within a
+        single layer is undefined.
+      </description>
+
+      <entry name="background" value="0"/>
+      <entry name="bottom" value="1"/>
+      <entry name="top" value="2"/>
+      <entry name="overlay" value="3"/>
+    </enum>
+
+    <!-- Version 3 additions -->
+
+    <request name="destroy" type="destructor" since="3">
+      <description summary="destroy the layer_shell object">
+        This request indicates that the client will not use the layer_shell
+        object any more. Objects that have been created through this instance
+        are not affected.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwlr_layer_surface_v1" version="4">
+    <description summary="layer metadata interface">
+      An interface that may be implemented by a wl_surface, for surfaces that
+      are designed to be rendered as a layer of a stacked desktop-like
+      environment.
+
+      Layer surface state (layer, size, anchor, exclusive zone,
+      margin, interactivity) is double-buffered, and will be applied at the
+      time wl_surface.commit of the corresponding wl_surface is called.
+
+      Attaching a null buffer to a layer surface unmaps it.
+
+      Unmapping a layer_surface means that the surface cannot be shown by the
+      compositor until it is explicitly mapped again. The layer_surface
+      returns to the state it had right after layer_shell.get_layer_surface.
+      The client can re-map the surface by performing a commit without any
+      buffer attached, waiting for a configure event and handling it as usual.
+    </description>
+
+    <request name="set_size">
+      <description summary="sets the size of the surface">
+        Sets the size of the surface in surface-local coordinates. The
+        compositor will display the surface centered with respect to its
+        anchors.
+
+        If you pass 0 for either value, the compositor will assign it and
+        inform you of the assignment in the configure event. You must set your
+        anchor to opposite edges in the dimensions you omit; not doing so is a
+        protocol error. Both values are 0 by default.
+
+        Size is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="width" type="uint"/>
+      <arg name="height" type="uint"/>
+    </request>
+
+    <request name="set_anchor">
+      <description summary="configures the anchor point of the surface">
+        Requests that the compositor anchor the surface to the specified edges
+        and corners. If two orthogonal edges are specified (e.g. 'top' and
+        'left'), then the anchor point will be the intersection of the edges
+        (e.g. the top left corner of the output); otherwise the anchor point
+        will be centered on that edge, or in the center if none is specified.
+
+        Anchor is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="anchor" type="uint" enum="anchor"/>
+    </request>
+
+    <request name="set_exclusive_zone">
+      <description summary="configures the exclusive geometry of this surface">
+        Requests that the compositor avoids occluding an area with other
+        surfaces. The compositor's use of this information is
+        implementation-dependent - do not assume that this region will not
+        actually be occluded.
+
+        A positive value is only meaningful if the surface is anchored to one
+        edge or an edge and both perpendicular edges. If the surface is not
+        anchored, anchored to only two perpendicular edges (a corner), anchored
+        to only two parallel edges or anchored to all edges, a positive value
+        will be treated the same as zero.
+
+        A positive zone is the distance from the edge in surface-local
+        coordinates to consider exclusive.
+
+        Surfaces that do not wish to have an exclusive zone may instead specify
+        how they should interact with surfaces that do. If set to zero, the
+        surface indicates that it would like to be moved to avoid occluding
+        surfaces with a positive exclusive zone. If set to -1, the surface
+        indicates that it would not like to be moved to accommodate for other
+        surfaces, and the compositor should extend it all the way to the edges
+        it is anchored to.
+
+        For example, a panel might set its exclusive zone to 10, so that
+        maximized shell surfaces are not shown on top of it. A notification
+        might set its exclusive zone to 0, so that it is moved to avoid
+        occluding the panel, but shell surfaces are shown underneath it. A
+        wallpaper or lock screen might set their exclusive zone to -1, so that
+        they stretch below or over the panel.
+
+        The default value is 0.
+
+        Exclusive zone is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="zone" type="int"/>
+    </request>
+
+    <request name="set_margin">
+      <description summary="sets a margin from the anchor point">
+        Requests that the surface be placed some distance away from the anchor
+        point on the output, in surface-local coordinates. Setting this value
+        for edges you are not anchored to has no effect.
+
+        The exclusive zone includes the margin.
+
+        Margin is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="top" type="int"/>
+      <arg name="right" type="int"/>
+      <arg name="bottom" type="int"/>
+      <arg name="left" type="int"/>
+    </request>
+
+    <enum name="keyboard_interactivity">
+      <description summary="types of keyboard interaction possible for a layer shell surface">
+        Types of keyboard interaction possible for layer shell surfaces. The
+        rationale for this is twofold: (1) some applications are not interested
+        in keyboard events and not allowing them to be focused can improve the
+        desktop experience; (2) some applications will want to take exclusive
+        keyboard focus.
+      </description>
+
+      <entry name="none" value="0">
+        <description summary="no keyboard focus is possible">
+          This value indicates that this surface is not interested in keyboard
+          events and the compositor should never assign it the keyboard focus.
+
+          This is the default value, set for newly created layer shell surfaces.
+
+          This is useful for e.g. desktop widgets that display information or
+          only have interaction with non-keyboard input devices.
+        </description>
+      </entry>
+      <entry name="exclusive" value="1">
+        <description summary="request exclusive keyboard focus">
+          Request exclusive keyboard focus if this surface is above the shell surface layer.
+
+          For the top and overlay layers, the seat will always give
+          exclusive keyboard focus to the top-most layer which has keyboard
+          interactivity set to exclusive. If this layer contains multiple
+          surfaces with keyboard interactivity set to exclusive, the compositor
+          determines the one receiving keyboard events in an implementation-
+          defined manner. In this case, no guarantee is made when this surface
+          will receive keyboard focus (if ever).
+
+          For the bottom and background layers, the compositor is allowed to use
+          normal focus semantics.
+
+          This setting is mainly intended for applications that need to ensure
+          they receive all keyboard events, such as a lock screen or a password
+          prompt.
+        </description>
+      </entry>
+      <entry name="on_demand" value="2" since="4">
+        <description summary="request regular keyboard focus semantics">
+          This requests the compositor to allow this surface to be focused and
+          unfocused by the user in an implementation-defined manner. The user
+          should be able to unfocus this surface even regardless of the layer
+          it is on.
+
+          Typically, the compositor will want to use its normal mechanism to
+          manage keyboard focus between layer shell surfaces with this setting
+          and regular toplevels on the desktop layer (e.g. click to focus).
+          Nevertheless, it is possible for a compositor to require a special
+          interaction to focus or unfocus layer shell surfaces (e.g. requiring
+          a click even if focus follows the mouse normally, or providing a
+          keybinding to switch focus between layers).
+
+          This setting is mainly intended for desktop shell components (e.g.
+          panels) that allow keyboard interaction. Using this option can allow
+          implementing a desktop shell that can be fully usable without the
+          mouse.
+        </description>
+      </entry>
+    </enum>
+
+    <request name="set_keyboard_interactivity">
+      <description summary="requests keyboard events">
+        Set how keyboard events are delivered to this surface. By default,
+        layer shell surfaces do not receive keyboard events; this request can
+        be used to change this.
+
+        This setting is inherited by child surfaces set by the get_popup
+        request.
+
+        Layer surfaces receive pointer, touch, and tablet events normally. If
+        you do not want to receive them, set the input region on your surface
+        to an empty region.
+
+        Keyboard interactivity is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="keyboard_interactivity" type="uint" enum="keyboard_interactivity"/>
+    </request>
+
+    <request name="get_popup">
+      <description summary="assign this layer_surface as an xdg_popup parent">
+        This assigns an xdg_popup's parent to this layer_surface.  This popup
+        should have been created via xdg_surface::get_popup with the parent set
+        to NULL, and this request must be invoked before committing the popup's
+        initial state.
+
+        See the documentation of xdg_popup for more details about what an
+        xdg_popup is and how it is used.
+      </description>
+      <arg name="popup" type="object" interface="xdg_popup"/>
+    </request>
+
+    <request name="ack_configure">
+      <description summary="ack a configure event">
+        When a configure event is received, if a client commits the
+        surface in response to the configure event, then the client
+        must make an ack_configure request sometime before the commit
+        request, passing along the serial of the configure event.
+
+        If the client receives multiple configure events before it
+        can respond to one, it only has to ack the last configure event.
+
+        A client is not required to commit immediately after sending
+        an ack_configure request - it may even ack_configure several times
+        before its next surface commit.
+
+        A client may send multiple ack_configure requests before committing, but
+        only the last request sent before a commit indicates which configure
+        event the client really is responding to.
+      </description>
+      <arg name="serial" type="uint" summary="the serial from the configure event"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the layer_surface">
+        This request destroys the layer surface.
+      </description>
+    </request>
+
+    <event name="configure">
+      <description summary="suggest a surface change">
+        The configure event asks the client to resize its surface.
+
+        Clients should arrange their surface for the new states, and then send
+        an ack_configure request with the serial sent in this configure event at
+        some point before committing the new surface.
+
+        The client is free to dismiss all but the last configure event it
+        received.
+
+        The width and height arguments specify the size of the window in
+        surface-local coordinates.
+
+        The size is a hint, in the sense that the client is free to ignore it if
+        it doesn't resize, pick a smaller size (to satisfy aspect ratio or
+        resize in steps of NxM pixels). If the client picks a smaller size and
+        is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
+        surface will be centered on this axis.
+
+        If the width or height arguments are zero, it means the client should
+        decide its own window dimension.
+      </description>
+      <arg name="serial" type="uint"/>
+      <arg name="width" type="uint"/>
+      <arg name="height" type="uint"/>
+    </event>
+
+    <event name="closed">
+      <description summary="surface should be closed">
+        The closed event is sent by the compositor when the surface will no
+        longer be shown. The output may have been destroyed or the user may
+        have asked for it to be removed. Further changes to the surface will be
+        ignored. The client should destroy the resource after receiving this
+        event, and create a new surface if they so choose.
+      </description>
+    </event>
+
+    <enum name="error">
+      <entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
+      <entry name="invalid_size" value="1" summary="size is invalid"/>
+      <entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
+      <entry name="invalid_keyboard_interactivity" value="3" summary="keyboard interactivity is invalid"/>
+    </enum>
+
+    <enum name="anchor" bitfield="true">
+      <entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
+      <entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
+      <entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
+      <entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
+    </enum>
+
+    <!-- Version 2 additions -->
+
+    <request name="set_layer" since="2">
+      <description summary="change the layer of the surface">
+        Change the layer that the surface is rendered on.
+
+        Layer is double-buffered, see wl_surface.commit.
+      </description>
+      <arg name="layer" type="uint" enum="zwlr_layer_shell_v1.layer" summary="layer to move this surface to"/>
+    </request>
+  </interface>
+</protocol>
diff --git a/screenshot.png b/screenshot.png
new file mode 100644
index 0000000..6e1b761
--- /dev/null
+++ b/screenshot.png
diff --git a/utf8.h b/utf8.h
new file mode 100644
index 0000000..c7db188
--- /dev/null
+++ b/utf8.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#include <stdint.h>
+
+#define UTF8_ACCEPT 0
+#define UTF8_REJECT 1
+
+static const uint8_t utf8d[] = {
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 00..1f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 20..3f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 40..5f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 60..7f
+	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, // 80..9f
+	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, // a0..bf
+	8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, // c0..df
+	0xa,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x4,0x3,0x3, // e0..ef
+	0xb,0x6,0x6,0x6,0x5,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8, // f0..ff
+	0x0,0x1,0x2,0x3,0x5,0x8,0x7,0x1,0x1,0x1,0x4,0x6,0x1,0x1,0x1,0x1, // s0..s0
+	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,0,1,0,1,1,1,1,1,1, // s1..s2
+	1,2,1,1,1,1,1,2,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1, // s3..s4
+	1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,3,1,3,1,1,1,1,1,1, // s5..s6
+	1,3,1,1,1,1,1,3,1,3,1,1,1,1,1,1,1,3,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // s7..s8
+};
+
+static inline uint32_t
+utf8decode(uint32_t *state, uint32_t *codep, uint8_t byte)
+{
+	uint32_t type = utf8d[byte];
+
+	*codep = (*state != UTF8_ACCEPT) ?
+		(byte & 0x3fu) | (*codep << 6) :
+		(0xff >> type) & (byte);
+
+	*state = utf8d[256 + *state*16 + type];
+	return *state;
+}