Changed API for CUSTOM_BLOCK and CUSTOM_INLINE.

Instead of using their `as.literal` content, we now
give each custom node *two* literal fields, one to
be printed on entering the node (before rendering
the children, if any), the other on exiting (after
rendering children).

This gives us the flexibility to have custom nodes
with children.

1 files changed, 23 insertions, 2 deletions

diff --git a/src/cmark.h b/src/cmark.h
index be5eaad..58839d3 100644
--- a/src/cmark.h
+++ b/src/cmark.h
@@ -160,7 +160,6 @@ CMARK_EXPORT cmark_node *cmark_node_last_child(cmark_node *node);
  * of type:
  *
  * * CMARK_NODE_HTML
- * * CMARK_NODE_CUSTOM_BLOCK
  * * CMARK_NODE_HRULE
  * * CMARK_NODE_CODE_BLOCK
  * * CMARK_NODE_TEXT
@@ -168,7 +167,6 @@ CMARK_EXPORT cmark_node *cmark_node_last_child(cmark_node *node);
  * * CMARK_NODE_LINEBREAK
  * * CMARK_NODE_CODE
  * * CMARK_NODE_INLINE_HTML
- * * CMARK_NODE_CUSTOM_INLINE
  *
  * Nodes must only be modified after an `EXIT` event, or an `ENTER` event for
  * leaf nodes.
@@ -319,6 +317,29 @@ CMARK_EXPORT const char *cmark_node_get_title(cmark_node *node);
  */
 CMARK_EXPORT int cmark_node_set_title(cmark_node *node, const char *title);
 
+/** Gets the literal "on enter" text for a custom 'node', or
+    NULL if none.
+ */
+CMARK_EXPORT const char *cmark_node_get_on_enter(cmark_node *node);
+
+/** Sets the literal text to render "on enter" for a custom 'node'.
+    Any children of the node will be rendered after this text.
+    Returns 1 on success 0 on failure.
+ */
+CMARK_EXPORT int cmark_node_set_on_enter(cmark_node *node,
+                                         const char *on_enter);
+
+/** Gets the literal "on exit" text for a custom 'node', or
+    NULL if none.
+ */
+CMARK_EXPORT const char *cmark_node_get_on_exit(cmark_node *node);
+
+/** Sets the literal text to render "on exit" for a custom 'node'.
+    Any children of the node will be rendered before this text.
+    Returns 1 on success 0 on failure.
+ */
+CMARK_EXPORT int cmark_node_set_on_exit(cmark_node *node, const char *on_exit);
+
 /** Returns the line on which 'node' begins.
  */
 CMARK_EXPORT int cmark_node_get_start_line(cmark_node *node);