| 
            hook_field_update_forbid           | 
                  
            core/modules/field/field.api.php           | 
                  
            Forbid a field update from occurring.           | 
              
          
                  | 
            hook_field_update_instance           | 
                  
            core/modules/field/field.api.php           | 
                  
            Act on a field instance being updated.           | 
              
          
                  | 
            hook_field_validate           | 
                  
            core/modules/field/field.api.php           | 
                  
            Validate this module's field data.           | 
              
          
                  | 
            hook_field_widget_error           | 
                  
            core/modules/field/field.api.php           | 
                  
            Flag a field-level validation error.           | 
              
          
                  | 
            hook_field_widget_form           | 
                  
            core/modules/field/field.api.php           | 
                  
            Return the form for a single field widget.           | 
              
          
                  | 
            hook_field_widget_form_alter           | 
                  
            core/modules/field/field.api.php           | 
                  
            Alter forms for field widgets provided by other modules.           | 
              
          
                  | 
            hook_field_widget_info           | 
                  
            core/modules/field/field.api.php           | 
                  
            Expose Field API widget types.           | 
              
          
                  | 
            hook_field_widget_info_alter           | 
                  
            core/modules/field/field.api.php           | 
                  
            Perform alterations on Field API widget types.           | 
              
          
                  | 
            hook_field_widget_properties_alter           | 
                  
            core/modules/field/field.api.php           | 
                  
            Alters the widget properties of a field instance before it gets displayed.           | 
              
          
                  | 
            hook_field_widget_properties_ENTITY_TYPE_alter           | 
                  
            core/modules/field/field.api.php           | 
                  
            Alters the widget properties of a field instance on a given entity type
before it gets displayed.           | 
              
          
                  | 
            hook_field_widget_settings_form           | 
                  
            core/modules/field_ui/field_ui.api.php           | 
                  
            Add settings to a widget settings form.           | 
              
          
                  | 
            hook_field_widget_WIDGET_TYPE_form_alter           | 
                  
            core/modules/field/field.api.php           | 
                  
            Alter widget forms for a specific widget provided by another module.           | 
              
          
                  | 
            hook_filetransfer_info           | 
                  
            core/modules/system/system.api.php           | 
                  
            Register information about FileTransfer classes provided by a module.           | 
              
          
                  | 
            hook_filetransfer_info_alter           | 
                  
            core/modules/system/system.api.php           | 
                  
            Alter the FileTransfer class registry.           | 
              
          
                  | 
            hook_file_access           | 
                  
            core/modules/file/file.api.php           | 
                  
            Control access to a file.           | 
              
          
                  | 
            hook_file_copy           | 
                  
            core/modules/system/system.api.php           | 
                  
            Respond to a file that has been copied.           | 
              
          
                  | 
            hook_file_default_types_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alter default file types.           | 
              
          
                  | 
            hook_file_delete           | 
                  
            core/modules/system/system.api.php           | 
                  
            Respond to file deletion.           | 
              
          
                  | 
            hook_file_download           | 
                  
            core/modules/system/system.api.php           | 
                  
            Control access to private file downloads and specify HTTP headers.           | 
              
          
                  | 
            hook_file_download_access           | 
                  
            core/modules/file/file.api.php           | 
                  
            Control download access to files.           | 
              
          
                  | 
            hook_file_download_access_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alter the access rules applied to a file download.           | 
              
          
                  | 
            hook_file_download_headers_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alter file download headers.           | 
              
          
                  | 
            hook_file_formatter_FORMATTER_settings           | 
                  
            core/modules/file/file.api.php           | 
                  
            Define formatter settings.           | 
              
          
                  | 
            hook_file_formatter_FORMATTER_view           | 
                  
            core/modules/file/file.api.php           | 
                  
            Define formatter output.           | 
              
          
                  | 
            hook_file_formatter_info           | 
                  
            core/modules/file/file.api.php           | 
                  
            Define file formatters.           | 
              
          
                  | 
            hook_file_formatter_info_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Perform alterations on file formatters.           | 
              
          
                  | 
            hook_file_insert           | 
                  
            core/modules/system/system.api.php           | 
                  
            Respond to a file being added.           | 
              
          
                  | 
            hook_file_load           | 
                  
            core/modules/system/system.api.php           | 
                  
            Load additional information into file entities.           | 
              
          
                  | 
            hook_file_metadata_info           | 
                  
            core/modules/file/file.api.php           | 
                  
            Provides metadata information.           | 
              
          
                  | 
            hook_file_metadata_info_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alters metadata information.           | 
              
          
                  | 
            hook_file_mimetype_mapping_alter           | 
                  
            core/modules/system/system.api.php           | 
                  
            Alter MIME type mappings used to determine MIME type from a file extension.           | 
              
          
                  | 
            hook_file_move           | 
                  
            core/modules/system/system.api.php           | 
                  
            Respond to a file that has been moved.           | 
              
          
                  | 
            hook_file_operations           | 
                  
            core/modules/file/file.api.php           | 
                  
            Add mass file operations.           | 
              
          
                  | 
            hook_file_predelete           | 
                  
            core/modules/system/system.api.php           | 
                  
            Act prior to file deletion.           | 
              
          
                  | 
            hook_file_presave           | 
                  
            core/modules/system/system.api.php           | 
                  
            Act on a file being inserted or updated.           | 
              
          
                  | 
            hook_file_ranking           | 
                  
            core/modules/file/file.api.php           | 
                  
            Provide additional methods of scoring for core search results for files.           | 
              
          
                  | 
            hook_file_search_result           | 
                  
            core/modules/file/file.api.php           | 
                  
            Act on a file being displayed as a search result.           | 
              
          
                  | 
            hook_file_transfer           | 
                  
            core/modules/file/file.api.php           | 
                  
            React to a file being downloaded.           | 
              
          
                  | 
            hook_file_type           | 
                  
            core/modules/file/file.api.php           | 
                  
            Decides which file type (bundle) should be assigned to a file entity.           | 
              
          
                  | 
            hook_file_type_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alters list of file types that can be assigned to a file.           | 
              
          
                  | 
            hook_file_update           | 
                  
            core/modules/system/system.api.php           | 
                  
            Respond to a file being updated.           | 
              
          
                  | 
            hook_file_update_index           | 
                  
            core/modules/file/file.api.php           | 
                  
            Act on a file being indexed for searching.           | 
              
          
                  | 
            hook_file_upload_skip_fields_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alters skip fields status.           | 
              
          
                  | 
            hook_file_url_alter           | 
                  
            core/modules/system/system.api.php           | 
                  
            Alter the URL to a file.           | 
              
          
                  | 
            hook_file_validate           | 
                  
            core/modules/system/system.api.php           | 
                  
            Check that files meet a given criteria.           | 
              
          
                  | 
            hook_file_view           | 
                  
            core/modules/file/file.api.php           | 
                  
            Add to files as they are viewed.           | 
              
          
                  | 
            hook_file_view_alter           | 
                  
            core/modules/file/file.api.php           | 
                  
            Alter files as they are viewed.           | 
              
          
                  | 
            hook_filter_FILTER_js_settings           | 
                  
            core/modules/filter/filter.api.php           | 
                  
            JavaScript settings callback for hook_filter_info().           | 
              
          
                  | 
            hook_filter_format_disable           | 
                  
            core/modules/filter/filter.api.php           | 
                  
            Perform actions when a text format has been disabled.           | 
              
          
                  | 
            hook_filter_format_insert           | 
                  
            core/modules/filter/filter.api.php           | 
                  
            Perform actions when a new text format has been created.           |