Merge pull request #16 from gjtorikian/expose-more-info

Add `sourcepos` information

ext/commonmarker/commonmarker.c

@@ -355,6 +355,34 @@ rb_node_get_type(VALUE self)
 	return symbol;
 }
 
+/*
+ * Public: Fetches the sourcepos of the node.
+ *
+ * Returns a {Hash} containing {Symbol} keys of the positions.
+ */
+static VALUE
+rb_node_get_sourcepos(VALUE self)
+{
+	int start_line, start_column, end_line, end_column;
+	VALUE result;
+
+	cmark_node *node;
+	Data_Get_Struct(self, cmark_node, node);
+
+	start_line = cmark_node_get_start_line(node);
+	start_column = cmark_node_get_start_column(node);
+	end_line = cmark_node_get_end_line(node);
+	end_column = cmark_node_get_end_column(node);
+
+	result = rb_hash_new();
+	rb_hash_aset(result, CSTR2SYM("start_line"), INT2NUM(start_line));
+	rb_hash_aset(result, CSTR2SYM("start_column"), INT2NUM(start_column));
+	rb_hash_aset(result, CSTR2SYM("end_line"), INT2NUM(end_line));
+	rb_hash_aset(result, CSTR2SYM("end_column"), INT2NUM(end_column));
+
+	return result;
+}
+
 /*
  * Public: Returns the type of the current pointer as a string.
  *
@@ -981,6 +1009,7 @@ void Init_commonmarker()
 	rb_define_method(rb_mNode, "string_content=", rb_node_set_string_content, 1);
 	rb_define_method(rb_mNode, "type", rb_node_get_type, 0);
 	rb_define_method(rb_mNode, "type_string", rb_node_get_type_string, 0);
+	rb_define_method(rb_mNode, "sourcepos", rb_node_get_sourcepos, 0);
 	rb_define_method(rb_mNode, "delete", rb_node_unlink, 0);
 	rb_define_method(rb_mNode, "first_child", rb_node_first_child, 0);
 	rb_define_method(rb_mNode, "next", rb_node_next, 0);

test/fixtures/dingus.md

@@ -0,0 +1,10 @@
+## Try CommonMark
+
+You can try CommonMark here.  This dingus is powered by
+[commonmark.js](https://github.com/jgm/commonmark.js), the
+JavaScript reference implementation.
+
+1. item one
+2. item two
+   - sublist
+   - sublist

test/test_attributes.rb

@@ -0,0 +1,101 @@
+require 'test_helper'
+
+class TestAttributes < Minitest::Test
+  def setup
+    contents = File.read(File.join(FIXTURES_DIR, 'dingus.md'))
+    @doc = CommonMarker.render_doc(contents.strip)
+  end
+
+  def test_sourcepos
+    sourcepos = []
+
+    @doc.walk do |node|
+      sourcepos << node.sourcepos
+    end
+
+    sourcepos.delete_if { |h| h.values.all? { |v| v == 0 } }
+
+    result = [
+      {
+        :start_line => 1,
+        :start_column => 1,
+        :end_line => 10,
+        :end_column => 12
+      },
+      {
+        :start_line => 1,
+        :start_column => 4,
+        :end_line => 1,
+        :end_column => 17
+      },
+      {
+        :start_line => 3,
+        :start_column => 1,
+        :end_line => 5,
+        :end_column => 36
+      },
+      {
+        :start_line => 7,
+        :start_column => 1,
+        :end_line => 10,
+        :end_column => 12
+      },
+      {
+        :start_line => 7,
+        :start_column => 1,
+        :end_line => 7,
+        :end_column => 11
+      },
+      {
+        :start_line => 7,
+        :start_column => 4,
+        :end_line => 7,
+        :end_column => 11
+      },
+      {
+        :start_line => 8,
+        :start_column => 1,
+        :end_line => 10,
+        :end_column => 12
+      },
+      {
+        :start_line => 8,
+        :start_column => 4,
+        :end_line => 8,
+        :end_column => 11
+      },
+      {
+        :start_line => 9,
+        :start_column => 4,
+        :end_line => 10,
+        :end_column => 12
+      },
+      {
+        :start_line => 9,
+        :start_column => 4,
+        :end_line => 9,
+        :end_column => 12
+      },
+      {
+        :start_line => 9,
+        :start_column => 6,
+        :end_line => 9,
+        :end_column => 12
+      },
+      {
+        :start_line => 10,
+        :start_column => 4,
+        :end_line => 10,
+        :end_column => 12
+      },
+      {
+        :start_line => 10,
+        :start_column => 6,
+        :end_line => 10,
+        :end_column => 12
+      }
+    ]
+
+    assert_equal result, sourcepos
+  end
+end