Add parameter to exclude headings from linking.

Signed-off-by: Thomas Hochstein <thh@inter.net>

_doc/dejure/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Version 1.1-beta (unreleased)
 
+* Add option to exclude headings from link generation.
 * Fix markdown errors in changelog.
 
 ### Version 1.0 (2017-05-25)

_doc/dejure/README.md

@@ -41,6 +41,10 @@ This filter accepts the following parameters:
   *dejure.org* will get a link to the *buzer.de* legal information
   service, covering all of the German Federal Law.
 
+* `noheadings` (`0` or `1`, Default: `0`)  
+  If set to `true` (`1`) no links will be added to headings
+  (i.e. `<h1>` to `<h9>` elements).
+
 * `target` (Default: `''`)  
   Add this to the `target` attribute of the `<a>` elements that are
   generated by the API, e.g. `<a href="..." target="_blank">`.

lib/filters/dejure.rb

@@ -29,6 +29,7 @@
 # params may be set as follows:
 # params[:format]      -> [weit|schmal]                (weit)
 # params[:buzer]       -> fallback to buzer.de?        (1)
+# params[:noheadings]  -> exclude headings from linker (0)
 # params[:target]      -> target for <a href>          ('')
 # params[:class]       -> CSS class for <a href>       ('')
 # params[:cache_days]  -> cache validity in days       (7)
@@ -74,6 +75,7 @@ module Nanoc::Filters
       end
       params[:format]           ||= 'weit'
       params[:buzer]            ||= 1
+      params[:ohnehtags]          = params.delete(:noheadings)
       return params
     end