Support multiple locator labels

See #147

README.md

@@ -361,13 +361,18 @@ like: `...as Matz explains (2008, p. 42)`.
 
 #### Page numbers and locators
 
-If you would like to add page numbers to your citation, you can use the
-`-l` or `--locator` option. For example, `{% cite ruby -l 23-5 %}` would
+If you would like to add page numbers or similar locators to your citation,
+use the `-l` or `--locator` option. For example, `{% cite ruby --locator 23-5 %}` would
 produce a citation like `(Matsumoto, 2008, pp. 23-5)`.
 
 When quoting multiple items (see above) you can add multiple locators after
 the list of ids. For example, `{% cite ruby microscope -l 2 -l 24 & 32 %}`.
 
+Page is the default locator, however, you can indicate the type of locator
+by adding a `-L` or `--label` option (one for each locator) for instance,
+`{% cite ruby microscope --label chapter --locator 3 -L figure -l 24 & 32 %}`
+produces something like: `(Matsumoto, 2008, chap. 3; Shaughnessy, 2013, figs. 24 & 32)`.
+
 #### Displaying formatted references
 
 If you want to display the full formatted reference entry, you can use the

features/citation.feature

@@ -250,6 +250,39 @@ Feature: Citations
         year      = {2008},
         publisher = {O'Reilly Media}
       }
+      @book{microscope,
+        title     = {Ruby Under a Microscope},
+        author    = {Pat Shaughnessy},
+        year      = {2013},
+        publisher = {No Starch Press}
+      }
+      """
+    And I have a page "scholar.html":
+      """
+      ---
+      ---
+      {% cite ruby microscope --label chapter --locator 2-3 -L figure -l 4,5 %}
+      """
+    When I run jekyll
+    Then the _site directory should exist
+    And the "_site/scholar.html" file should exist
+    And I should see "Matsumoto, 2008, chaps. 2-3; Shaughnessy, 2013, figs. 4,5" in "_site/scholar.html"
+
+  @tags @cite @locator @label
+  Scenario: Citations with multiple locator labels
+    Given I have a scholar configuration with:
+      | key          | value             |
+      | source       | ./_bibliography   |
+      | bibliography | my_references     |
+    And I have a "_bibliography" directory
+    And I have a file "_bibliography/my_references.bib":
+      """
+      @book{ruby,
+        title     = {The Ruby Programming Language},
+        author    = {Matsumoto, Yukihiro},
+        year      = {2008},
+        publisher = {O'Reilly Media}
+      }
       """
     And I have a page "scholar.html":
       """
@@ -260,7 +293,7 @@ Feature: Citations
     When I run jekyll
     Then the _site directory should exist
     And the "_site/scholar.html" file should exist
-    And I should see "Flanagan & Matsumoto, 2008, chap. 3" in "_site/scholar.html"
+    And I should see "Matsumoto, 2008, chap. 3" in "_site/scholar.html"
 
   @tags @cite @citation_number
   Scenario: Multiple citations using citation numbers

lib/jekyll/scholar/utilities.rb

@@ -18,9 +18,7 @@ module Jekyll
     module Utilities
 
 
-      attr_reader :config, :site, :context,
-        :prefix, :text, :offset, :max, :label
-
+      attr_reader :config, :site, :context, :prefix, :text, :offset, :max
 
 
       def split_arguments(arguments)
@@ -71,7 +69,7 @@ module Jekyll
           end
 
           opts.on('-L', '--label LABEL') do |label|
-            @label = label
+            labels << label
           end
 
           opts.on('-o', '--offset OFFSET') do |offset|
@@ -112,6 +110,10 @@ module Jekyll
         @locators ||= []
       end
 
+      def labels
+        @labels ||= []
+      end
+
       def bibtex_files
         @bibtex_files ||= [config['bibliography']]
       end
@@ -568,7 +570,7 @@ module Jekyll
       end
 
       def render_citation(items)
-        renderer.render items.zip(locators).map { |entry, locator|
+        renderer.render items.zip(locators.zip(labels)).map { |entry, (locator, label)|
           cited_keys << entry.key
           cited_keys.uniq!