diff --git a/modules/blocktheme/LICENSE.txt b/modules/blocktheme/LICENSE.txt
deleted file mode 100644
index d159169..0000000
--- a/modules/blocktheme/LICENSE.txt
+++ /dev/null
@@ -1,339 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  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
-this service 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 make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  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.
-
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
-
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
-
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary.  To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
-
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
-
-  1. You may copy and distribute 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 and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
-
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
-
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
-
-    a) You must cause the modified files to carry prominent notices
-    stating that you changed the files and the date of any change.
-
-    b) You must cause any work that you distribute or publish, that in
-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
-    parties under the terms of this License.
-
-    c) If the modified program normally reads commands interactively
-    when run, you must cause it, when started running for such
-    interactive use in the most ordinary way, to print or display an
-    announcement including an appropriate copyright notice and a
-    notice that there is no warranty (or else, saying that you provide
-    a warranty) and that users may redistribute the program under
-    these conditions, and telling the user how to view a copy of this
-    License.  (Exception: if the Program itself is interactive but
-    does not normally print such an announcement, your work based on
-    the Program is not required to print an announcement.)
-
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works.  But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
-
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
-
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
-
-    a) Accompany it with the complete corresponding machine-readable
-    source code, which must be distributed under the terms of Sections
-    1 and 2 above on a medium customarily used for software interchange; or,
-
-    b) Accompany it with a written offer, valid for at least three
-    years, to give any third party, for a charge no more than your
-    cost of physically performing source distribution, a complete
-    machine-readable copy of the corresponding source code, to be
-    distributed under the terms of Sections 1 and 2 above on a medium
-    customarily used for software interchange; or,
-
-    c) Accompany it with the information you received as to the offer
-    to distribute corresponding source code.  (This alternative is
-    allowed only for noncommercial distribution and only if you
-    received the program in object code or executable form with such
-    an offer, in accord with Subsection b above.)
-
-The source code for a work means the preferred form of the work for
-making modifications to it.  For an executable work, complete source
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-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
-
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
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-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
-
-  5. You are not required to accept this License, since you have not
-signed it.  However, nothing else grants you permission to modify or
-distribute the Program or its derivative works.  These actions are
-prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
-
-  6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions.  You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
-
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-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
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
-
-  9. The Free Software Foundation may publish revised and/or new versions
-of the 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 a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
-                            NO WARRANTY
-
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, 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.
-
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE 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.
-
-                     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
-convey 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 2 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, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision 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, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This 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.
diff --git a/modules/blocktheme/README.txt b/modules/blocktheme/README.txt
deleted file mode 100644
index 6328667..0000000
--- a/modules/blocktheme/README.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-
-== Description ==
-BlockTheme allows an admin to define tpl files for standard block templates
-and provides a select box on the block configure form so the user can select
-a tpl file to use as opposed to having to override the templates by block ID.
-
-== Installation ==
-
-1. Enable the module
-
-2. Go to admin/config/user-interface/blocktheme and add entries like:
-customtemplate|My Custom Template
-mysupertemplate|My SuperTemplate
-Where the first name is the machine-readable name of your template which may contain only
-alphanumerical characters, -, or _ . The second name is the user-friendly name that appears
-in the selectionbox on the block edit form.
-
-3. Choose from either step 4. or 5.
-
-4. Create tpl files in your theme directory like: (Note: filenames must be preceded by block--blocktheme--)
- block--blocktheme--customtemplate.tpl.php
- block--blocktheme--mysupertemplate.tpl.php
-
-5. Alternatively use the extra provided variable $blocktheme to customize your
- block.tpl.php or block-*.tpl.php files. The $blocktheme will typically be
- used as a css class name in you template and contains the machine-readable name of
- your template.
-
-6. In your custom block templates, you can also use values from the
- $blocktheme_vars variable. This array contains custom variables defined in the
- block edit form, right below the block theme selection.
-
-== Usage ==
-
-Go to the edit form for any block and select the appropriate template.
-
-== Credits ==
-
-Updated for Drupal 7 and currently maintained by:
- - Andrei Mateescu - http://drupal.org/user/729614
-
-Updated for Drupal 6 by:
- - Tony Miller - tony.miller@eightyoptions.com
- - Gertjan Idema - http://drupal.org/user/269240
diff --git a/modules/blocktheme/blocktheme.info b/modules/blocktheme/blocktheme.info
deleted file mode 100644
index f8e4de5..0000000
--- a/modules/blocktheme/blocktheme.info
+++ /dev/null
@@ -1,12 +0,0 @@
-name = Block Theme
-description = Provides a configuration option to select custom themes for blocks
-core = 7.x
-files[] = blocktheme.module
-configure = admin/config/user-interface/blocktheme
-
-; Information added by drupal.org packaging script on 2012-06-01
-version = "7.x-1.1"
-core = "7.x"
-project = "blocktheme"
-datestamp = "1338543351"
-
diff --git a/modules/blocktheme/blocktheme.install b/modules/blocktheme/blocktheme.install
deleted file mode 100644
index aaf6973..0000000
--- a/modules/blocktheme/blocktheme.install
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * @file
- *   Install file for blocktheme module.
- */
-
-/**
- * Implements hook_uninstall().
- */
-function blocktheme_uninstall() {
-  variable_del('blocktheme');
-  variable_del('blocktheme_show_custom_block_theme');
-  variable_del('blocktheme_themes');
-  variable_del('blocktheme_vars');
-}
diff --git a/modules/blocktheme/blocktheme.module b/modules/blocktheme/blocktheme.module
index a8374bd..bbded7b 100644
--- a/modules/blocktheme/blocktheme.module
+++ b/modules/blocktheme/blocktheme.module
@@ -11,61 +11,6 @@
  */
 
 /**
- * Implements hook_theme().
- */
-// function blocktheme_theme() {
-//   $return = array();
-//   if (variable_get('blocktheme_show_custom_block_theme', '')) {
-//     // Override the default admin display form template
-//     $return['block_admin_display_form'] = array(
-//       'template' => 'blocktheme-admin-display-form',
-//     );
-//   }
-
-//   return $return;
-// }
-
-/**
- * Implements hook_menu().
- */
-function blocktheme_menu() {
-  $items = array();
-  $items['admin/config/user-interface/blocktheme'] = array(
-    'title' => 'Block Theme',
-    'description' => "Define re-usable block templates that can be configured from each block's configuration page.",
-    'page callback' => 'drupal_get_form',
-    'page arguments' => array('blocktheme_admin_settings'),
-    'access arguments' => array('administer site configuration'),
-    'type' => MENU_NORMAL_ITEM,
-  );
-
-  return $items;
-}
-
-/**
- * Block Theme settings page.
- */
-function blocktheme_admin_settings() {
-  $form = array();
-  $form['blocktheme_themes'] = array(
-    '#type' => 'textarea',
-    '#default_value' => variable_get('blocktheme_themes', ''),
-    '#title' => t('Custom Block Templates'),
-    '#description' => t('Enter one value per row in the form: <em>customtemplate|Friendly Name</em>, where "customtemplate" corresponds to a tpl file called <em>block--blocktheme--customtemplate.tpl.php</em> as well as to the value of an extra variable <em>$blocktheme</em> in the block template.'),
-    '#wysiwyg' => FALSE,
-  );
-  $form['blocktheme_show_custom_block_theme'] = array(
-    '#type' => 'checkbox',
-    '#default_value' => variable_get('blocktheme_show_custom_block_theme', ''),
-    '#title' => t('Show Custom Block Theme'),
-    '#description' => t('Show the custom block theme used for a block in the <a href="@block-admin-page">block admin page</a>.', array('@block-admin-page' => url('admin/build/block'))),
-  );
-  $form['#submit'][] = 'blocktheme_admin_settings_submit';
-
-  return system_settings_form($form);
-}
-
-/**
  * Implements hook_help().
  */
 function blocktheme_help($path, $arg) {
@@ -80,20 +25,29 @@ function blocktheme_help($path, $arg) {
 }
 
 /**
- * Handle submission of the blocktheme administrative page form.
+ * Implements hook_theme().
  */
-function blocktheme_admin_settings_submit($form, &$form_state) {
-  drupal_theme_rebuild();
+function blocktheme_theme() {
+  $return = array();
+
+  $config = Drupal::config('blocktheme.settings');
+  if ($config->get('blocktheme_show_custom_block_theme')) {
+    // Override the default admin display form template
+    $return['block_admin_display_form'] = array(
+      'template' => 'blocktheme-admin-display-form',
+      'render element' => 'element',
+    );
+  }
+  return $return;
 }
 
+
 /**
  * Form for updating a block.
  */
-function blocktheme_form_block_admin_configure_alter(&$form, &$form_state) {
-  $module = $form['module']['#value'];
-  $delta = $form['delta']['#value'];
-  $var_name = $module . '-' . $delta;
-
+function blocktheme_form_block_form_alter(&$form, &$form_state, $form_id) {
+  $module = $form['settings']['module']['#value'];
+  $var_name = $module;
   $options = blocktheme_get_blockthemes();
   $blocktheme = blocktheme_get();
   $blocktheme_vars = blocktheme_get_vars();
@@ -101,67 +55,110 @@ function blocktheme_form_block_admin_configure_alter(&$form, &$form_state) {
   $form['settings']['#weight'] = -2;
   $form['regions']['#weight'] = -1;
   $form['custom_block_theme'] = array(
-    '#type' => 'fieldset',
-    '#title' => t('Block Theme'),
-    '#weight' => 0,
+    '#type'        => 'details',
+    '#title'       => t('Block Theme'),
+    '#weight'      => 0,
     '#collapsible' => TRUE,
-    '#collapsed' => FALSE,
+    '#collapsed'   => FALSE,
+    '#open'        => TRUE,
   );
   $form['custom_block_theme']['blocktheme'] = array(
-    '#type' => 'select',
-    '#title' => t('Custom theme'),
+    '#type'          => 'select',
+    '#title'         => t('Custom theme'),
+    '#options'       => $options,
     '#default_value' => isset($blocktheme[$var_name]) ? $blocktheme[$var_name] : '',
-    '#options' => $options,
   );
   $form['custom_block_theme']['blocktheme_vars'] = array(
-    '#type' => 'textarea',
+    '#type'          => 'textarea',
+    '#title'         => t('Custom block variables'),
+    '#description'   => t('Enter one entry per line, in the format: <em>variable_name|variable_content</em>.'),
+    '#wysiwyg'       => FALSE,
     '#default_value' => isset($blocktheme_vars[$var_name]) ? blocktheme_format_vars_admin($blocktheme_vars[$var_name]) : '',
-    '#title' => t('Custom block variables'),
-    '#description' => t('Enter one entry per line, in the format: <em>variable_name|variable_content</em>.'),
-    '#wysiwyg' => FALSE,
   );
+  $form['actions']['submit']['#submit'][] ='blocktheme_update';
+}
+
+/**
+ * Update an existing block after the block form has been submitted.
+ */
+function blocktheme_update($form, &$form_state) {
+  $var_name = $form_state['values']['settings']['module'];
 
-  $form['#submit'][] = 'blocktheme_update';
+  $blocktheme = blocktheme_get();
+  $blocktheme_vars = blocktheme_get_vars();
+  if (!$form_state['values']['custom_block_theme']['blocktheme']) {
+    unset($blocktheme[$var_name]);
+  }
+  else {
+    $blocktheme[$var_name] = $form_state['values']['custom_block_theme']['blocktheme'];
+  }
+  if (!$form_state['values']['custom_block_theme']['blocktheme_vars']) {
+    unset($blocktheme_vars[$var_name]);
+  }
+  else {
+    $blocktheme_vars[$var_name] = blocktheme_format_vars($form_state['values']['custom_block_theme']['blocktheme_vars']);
+  }
+  blocktheme_set($blocktheme, $blocktheme_vars);
+  drupal_theme_rebuild();
 }
 
 /**
  * Form for adding a new block.
  */
-function blocktheme_form_block_add_block_form_alter(&$form, &$form_state) {
+function blocktheme_form_basic_custom_block_form_alter(&$form, &$form_state, $form_id) {
   $options = blocktheme_get_blockthemes();
-
   $form['settings']['#weight'] = -2;
   $form['regions']['#weight'] = -1;
   $form['custom_block_theme'] = array(
-    '#type' => 'fieldset',
-    '#title' => t('Block Theme'),
-    '#weight' => 0,
+    '#type'        => 'details',
+    '#title'       => t('Block Theme'),
+    '#weight'      => 0,
+    '#open'        => TRUE,
+    '#collapsed'   => FALSE,
     '#collapsible' => TRUE,
-    '#collapsed' => FALSE,
   );
   $form['custom_block_theme']['blocktheme'] = array(
-    '#type' => 'select',
-    '#title' => t('Custom theme'),
+    '#type'    => 'select',
+    '#title'   => t('Custom theme'),
     '#options' => $options,
   );
   $form['custom_block_theme']['blocktheme_vars'] = array(
-    '#type' => 'textarea',
+    '#type'          => 'textarea',
+    '#title'         => t('Custom block variables'),
+    '#wysiwyg'       => FALSE,
+    '#description'   => t('Enter one entry per line, in the format: <em>variable_name|variable_content</em>.'),
     '#default_value' => '',
-    '#title' => t('Custom block variables'),
-    '#description' => t('Enter one entry per line, in the format: <em>variable_name|variable_content</em>.'),
-    '#wysiwyg' => FALSE,
   );
+  $form['actions']['submit']['#submit'][] = 'blocktheme_save';
+}
 
-  $form['#submit'][] = 'blocktheme_save';
+/**
+ * Save a new block after the block form has been submitted.
+ */
+function blocktheme_save($form, &$form_state) {
+  $var_name = $form_state['values']['settings']['module'];
+  $blocktheme = blocktheme_get();
+  $blocktheme_vars = blocktheme_get_vars();
+  if ($form_state['values']['custom_block_theme']['blocktheme']) {
+    $blocktheme[$var_name] = $form_state['values']['custom_block_theme']['blocktheme'];
+  }
+  if ($form_state['values']['custom_block_theme']['blocktheme_vars']) {
+    $blocktheme_vars[$var_name] = blocktheme_format_vars($form_state['values']['custom_block_theme']['blocktheme_vars']);
+  }
+  blocktheme_set($blocktheme, $blocktheme_vars);
+  drupal_theme_rebuild();
 }
 
 /**
  * Set Block Theme custom block settings.
  */
 function blocktheme_set($blocktheme, $blocktheme_vars = NULL) {
-  variable_set('blocktheme', $blocktheme);
+  $config = Drupal::config('blocktheme.settings');
+  $config->set('blocktheme', $blocktheme)
+    ->save();
   if ($blocktheme_vars) {
-    variable_set('blocktheme_vars', $blocktheme_vars);
+    $config->set('blocktheme_vars', $blocktheme_vars)
+    ->save();
   }
 }
 
@@ -170,10 +167,13 @@ function blocktheme_set($blocktheme, $blocktheme_vars = NULL) {
  */
 function blocktheme_get() {
   static $blocktheme;
+  $config = Drupal::config('blocktheme.settings');
   if (empty($blocktheme)) {
-    $blocktheme = variable_get('blocktheme', array());
+    $blocktheme = $config->get('blocktheme');
+    if (is_null($blocktheme)) {
+      $blocktheme =  array();
+    }
   }
-
   return $blocktheme;
 }
 
@@ -182,80 +182,35 @@ function blocktheme_get() {
  */
 function blocktheme_get_vars() {
   static $blocktheme_vars;
+  $config = Drupal::config('blocktheme.settings');
   if (empty($blocktheme_vars)) {
-    $blocktheme_vars = variable_get('blocktheme_vars', array());
+    $blocktheme_vars = $config->get('blocktheme_vars');
+    if (is_null($blocktheme_vars)) {
+      $blocktheme_vars =  array();
+    }
   }
-
   return $blocktheme_vars;
 }
 
-/**
- * Update an existing block after the block form has been submitted.
- */
-function blocktheme_update($form_id, &$form_state) {
-  $var_name = $form_state['values']['module'] . '-' . $form_state['values']['delta'];
-
-  $blocktheme = blocktheme_get();
-  $blocktheme_vars = blocktheme_get_vars();
-
-  if (!$form_state['values']['blocktheme']) {
-    unset($blocktheme[$var_name]);
-  }
-  else {
-    $blocktheme[$var_name] = $form_state['values']['blocktheme'];
-  }
-  if (!$form_state['values']['blocktheme_vars']) {
-    unset($blocktheme_vars[$var_name]);
-  }
-  else {
-    $blocktheme_vars[$var_name] = blocktheme_format_vars($form_state['values']['blocktheme_vars']);
-  }
-  blocktheme_set($blocktheme, $blocktheme_vars);
-  drupal_theme_rebuild();
-}
-
-/**
- * Save a new block after the block form has been submitted.
- */
-function blocktheme_save($form_id, &$form_state) {
-  // First, get the new delta value
-  $result = db_query_range("SELECT delta FROM {block} ORDER BY bid DESC", 0, 1);
-  if ($record = $result->fetchObject()) {
-    $delta = $record->delta;
-    $var_name = $form_state['values']['module'] . '-' . $delta;
-
-    $blocktheme = blocktheme_get();
-    $blocktheme_vars = blocktheme_get_vars();
-
-    if ($form_state['values']['blocktheme']) {
-      $blocktheme[$var_name] = $form_state['values']['blocktheme'];
-    }
-    if ($form_state['values']['blocktheme_vars']) {
-      $blocktheme_vars[$var_name] = blocktheme_format_vars($form_state['values']['blocktheme_vars']);
-    }
-    blocktheme_set($blocktheme, $blocktheme_vars);
-    drupal_theme_rebuild();
-  };
-}
 
 /**
  * Get the defined blockthemes and return an array to be used in a select list.
  */
 function blocktheme_get_blockthemes() {
+  $config = Drupal::config('blocktheme.settings');
   $options = array();
-  $blockthemes = variable_get('blocktheme_themes', '');
-
+  $blockthemes = $config->get('blocktheme_themes');
+  if (is_null($blockthemes)) {
+      $blocktheme_vars =  '';
+  }
   $options[] = t('- None -');
-
   if ($blockthemes) {
     $_sets = explode("\n", $blockthemes);
-
     foreach ($_sets as $key => $value) {
       $set = explode('|', $value);
       $options[$set[0]] = $set[1];
     }
   }
-
   return $options;
 }
 
@@ -271,7 +226,6 @@ function blocktheme_format_vars($block_vars) {
       $formatted_vars[$set[0]] = $set[1];
     }
   }
-
   return $formatted_vars;
 }
 
@@ -286,7 +240,6 @@ function blocktheme_format_vars_admin($block_vars) {
     }
     $formatted_vars = implode("\n", $_formatted_vars);
   }
-
   return $formatted_vars;
 }
 
@@ -295,7 +248,8 @@ function blocktheme_format_vars_admin($block_vars) {
  */
 function blocktheme_get_theme($block) {
   $blocktheme = blocktheme_get();
-  $var_name = $block->module . '-' . $block->delta;
+  $settings = $block->get('settings');
+  $var_name = $settings['module'];
   if (isset($blocktheme[$var_name])) {
     return $blocktheme[$var_name];
   }
@@ -306,7 +260,8 @@ function blocktheme_get_theme($block) {
  */
 function blocktheme_get_theme_vars($block) {
   $blocktheme_vars = blocktheme_get_vars();
-  $var_name = $block->module . '-' . $block->delta;
+  $settings = $block->get('settings');
+  $var_name = $settings['module'];
   if (isset($blocktheme_vars[$var_name])) {
     return $blocktheme_vars[$var_name];
   }
@@ -316,41 +271,48 @@ function blocktheme_get_theme_vars($block) {
  * Implements hook_preprocess_block().
  */
 function blocktheme_preprocess_block(&$variables) {
+  $variables['block'] = $variables['elements']['#block'];
+  $custom_block_theme = NULL;
   if ($custom_block_theme = blocktheme_get_theme($variables['block'])) {
     $variables['blocktheme'] = $custom_block_theme;
-    $variables['classes_array'][] = $custom_block_theme;
-    $variables['theme_hook_suggestion'][] = 'block__blocktheme__' . str_replace('-', '_', $custom_block_theme);
-
+    $variables['attributes']['class'][] = $custom_block_theme;
   }
-  // drupal_set_message('<pre><h1><i style="color:grey"><u>Taky debug:</u></i></h1> ' . check_plain(print_r($variables['theme_hook_suggestions'], 1)) . '</pre>');
-
-  // drupal_set_message('<pre><h1><i style="color:grey"><u>Taky debug:</u></i></h1> ' . check_plain(print_r($variables, 1)) . '</pre>');
-
   if ($custom_block_vars = blocktheme_get_theme_vars($variables['block'])) {
     $variables['blocktheme_vars'] = $custom_block_vars;
   }
 }
 
-// /**
-//  * Implements template_preprocess_block_admin_display_form().
-//  */
-// function blocktheme_preprocess_block_admin_display_form(&$variables) {
-//   if (variable_get('blocktheme_show_custom_block_theme', '')) {
-//     // Get blocks with custom templates.
-//     $blocktheme = blocktheme_get();
-//     // Get block theme names.
-//     $blocktheme_themes = blocktheme_get_blockthemes();
-
-//     // Add each block in the form to the appropriate place in the block listing.
-//     foreach (element_children($variables['form']['blocks']) as $i) {
-//       $block = &$variables['form']['blocks'][$i];
-
-//       // Fetch the region for the current block.
-//       $region = (isset($block['region']['#default_value']) ? $block['region']['#default_value'] : BLOCK_REGION_NONE);
-//       // Set block theme key for the current module.
-//       $var_name = $block['module']['#value'] . '-' . $block['delta']['#value'];
+/**
+ * Implements hook_theme_suggestions_alter().
+ */
+function blocktheme_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
+  if ($hook == 'block') {
+    $variables['block'] = $variables['elements']['#block'];
+    $custom_block_theme = NULL;
+    if ($custom_block_theme = blocktheme_get_theme($variables['block'])) {
+      $suggestions[] = 'block__blocktheme_' . $custom_block_theme;
+    }
+  }
+}
 
-//       $variables['block_listing'][$region][$i]->custom_block_theme = (isset($blocktheme[$var_name])) ? $blocktheme_themes[$blocktheme[$var_name]] : '';
-//     }
-//   }
-// }
+/**
+ * Implements template_preprocess_block_admin_display_form().
+ */
+function template_preprocess_block_admin_display_form(&$variables) {
+  $config = Drupal::config('blocktheme.settings');
+  if ($config->get('blocktheme_show_custom_block_theme') == '') {
+    // Get blocks with custom templates.
+    $blocktheme = blocktheme_get();
+    // Get block theme names.
+    $blocktheme_themes = blocktheme_get_blockthemes();
+    // Add each block in the form to the appropriate place in the block listing.
+    foreach (element_children($variables['form']['blocks']) as $i) {
+      $block = &$variables['form']['blocks'][$i];
+      // Fetch the region for the current block.
+      $region = (isset($block['region']['#default_value']) ? $block['region']['#default_value'] : BLOCK_REGION_NONE);
+      // Set block theme key for the current module.
+      $var_name = $block['module']['#value'];
+      $variables['block_listing'][$region][$i]->custom_block_theme = (isset($blocktheme[$var_name])) ? $blocktheme_themes[$blocktheme[$var_name]] : '';
+    }
+  }
+}
