all: store the list item counter inside element

In the parseListOrdered, each time we found list item, we store its
counter and increment it by one so backend can use it to render the
counter.

1 files changed, 4 insertions, 3 deletions

diff --git a/element.go b/element.go
index 8f6348d..c0e94c1 100644
--- a/element.go
+++ b/element.go
@@ -42,9 +42,10 @@ type element struct {
 
 	elementAttribute
 
-	rawLabel bytes.Buffer
-	level    int // The number of dot for ordered list, or '*' for unordered list.
-	kind     int
+	rawLabel       bytes.Buffer
+	level          int // The number of dot for ordered list, or '*' for unordered list.
+	listItemNumber int // The counter for list item, start from 1.
+	kind           int
 
 	// List of substitutions to be applied on raw.
 	applySubs int