Search API autocomplete
-----------------------

Adds autocomplete capabilities for Search API searches.


Information for users
---------------------

- Necessary server feature

The server on which the search will be executed has to support the
"search_api_autocomplete" feature in order for autocompletion to work. Searches
on other servers won't be affected by this module.
Currently, only the Solr service class [1] is known to support this feature.

[1] http://drupal.org/project/search_api_solr

- Necessary setup

After having installed and enabled the module, you have to do some
administrative steps to activate the autocomplete functionality. Autocompletion
can be enabled and configured for each search separately.

To activate autocompletion for an index's searches, go to the index's
„Autocomplete“ tab. There, you see all available searches for the index and can
enable (and afterwards configure) autocompletion for each of them. All fulltext
key fields on the searches should then become autocompletion fields.

- Supported searches

Currently, only search forms built by search pages or search views are
supported directly. However, other modules can easily also use this
functionality. See the "Information for developers" for details.

  - Caution! -
  If your view uses contextual filters, those can generally not be inferred in
  the autocompletion function which might lead to problems of different kinds,
  including display of confidential information (if such information would be
  available without contextual filters), wrong suggestions or complete absence
  of suggestions.
  Therefore, you should create another display without contextual filters, if
  necessary, and make sure that this doesn't lead to any leaks.
  If you want to fix this in a custom way for your site, take a look at
  example_search_api_query_alter() for suggestions.


Information for developers
--------------------------

- Supporting autocompletion with a service class

To support autocompletion with a service class, the class has to support the
"search_api_autocomplete" feature. This will necessitate the service class to
have a getAutocompleteSuggestions() method as detailed in the interface in
search_api_autocomplete.interface.php.

- Supporting autocompletion on a search form

If you have a search form not generated by the Search views or Search pages
modules, you can use hook_search_api_autocomplete_types() to tell this module
about it. For details, see the hook documentation in the
search_api_autocomplete.api.php file, or look at the existing implementations
in search_api_autocomplete.search_api_page.inc and
search_api_autocomplete.search_api_views.inc.