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This files describes API changes in /blocks/* - activity modules,
information provided here is intended especially for developers.

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=== 3.3 ===

* block_manager::get_required_by_theme_block_types() is no longer static.
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* The 'Course overview' block has been removed from core as it is being replaced by the 'My overview' block.
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  During the upgrade process the 'Course overview' block will be uninstalled and all its settings will be deleted.
  If you wish to keep the 'Course overview' block and its settings, download it from moodle.org and put it back in
  the blocks/ directory BEFORE UPGRADING.
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=== 3.1 ===

* The collapsed class was removed from the navigation block to make it compatible with aria.
* New aria attributes were added on the navigation block [aria-expanded="false"].
* The tree JS handling were moved from YUI to AMD module (Jquery).

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=== 2.9 ===

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* The obsolete method preferred_width() was removed (it was not doing anything)
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* Deprecated block_base::config_save as is not called anywhere and should not be used.
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* Added instance_copy() function to the block_base class. This function allows for block
  specific data to be copied when a block is copied.
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=== 2.8 ===

* The instance_config_print() function was removed. It was deprecated in
  Moodle 2.0, but without debugging notices. Since it was no longer a part
  of the code path, debugging notices would not have been displayed.
* Deprecated functions were removed from the block_base class:
** _print_block()
** _print_shadow()
** _title_html()
** _add_edit_controls()
** config_print()

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=== 2.6 ===

* Deprecated /admin/block.php was removed, make sure blocks are using settings.php instead.

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=== 2.4 ===

Created new capability 'blocks/xxx:myaddinstance' that determines whether a user can add
a specific block to their My Home page. This capability was only defined for blocks where
the applicable_formats function does not include "'my' => false" in the returned array,
allowing it be added to the My Home page.

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=== 2.3 ===

required changes in code:
* block_xxx_pluginfile() is now given the 7th parameter (hopefully the last one) that
  contains additional options for the file serving. The array should be re-passed
  to send_stored_file().
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=== 2.0 ===

required changes in code:
* use new DML syntax everywhere
* use new DDL syntax in db/upgrade.php
* replace defaults.php by settings.php and db/install.php
* replace STATEMENTS section in db/install.xml by db/install.php
* move post instalation code from install() method into db/install.php
* completely rewrite file handling
* rewrite backup/restore
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* theme changes: move plugin styles into blocks/xxx/styles.css and use new css markers for images,
                 move all images into new blocks/xxx/pix/ directory and use new outputlib api
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                 old global $THEME is fully replaced by $OUTPUT
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Petr Skoda committed
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* remove '_utf8' from language pack names, use new {$a} syntax in language packs
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* use 'pluginname' lang pack identifier instead of 'blockname'
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* move cron and version number into standard version.php
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* removed support for old config_global.html, use settings.php
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