Commit 232ceeac24980bbe05c22d23f68c7d907fb98260
2016-12-16T00:11:23
md_analyze_line: A list item can begin with at most one blank line (issue #6). Hacky. I very dislike it, but it brings us full CommonMark 0.27 compliance. Hallelujah.
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diff --git a/README.md b/README.md
index dfb2475..f49a436 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ MD4C is C Markdown parser with the following features:
* **Compliance:** Generally MD4C aims to be compliant to the latest version of
[CommonMark specification](http://spec.commonmark.org/). Right now we are
- very close to CommonMark 0.27.
+ fully compliant to CommonMark 0.27.
* **Extensions:** MD4C supports some commonly requested and accepted extensions.
See below.
diff --git a/md4c/md4c.c b/md4c/md4c.c
index dd5edee..bae422e 100644
--- a/md4c/md4c.c
+++ b/md4c/md4c.c
@@ -147,6 +147,7 @@ struct MD_CTX_tag {
int alloc_containers;
int last_line_has_list_loosening_effect;
+ int last_list_item_starts_with_two_blank_lines;
/* Minimal indentation to call the block "indented code block". */
unsigned code_indent_offset;
@@ -4942,10 +4943,47 @@ redo:
ctx->last_line_has_list_loosening_effect = (n_parents > 0 &&
n_brothers + n_children == 0 &&
ctx->containers[n_parents-1].ch != _T('>'));
+
+#if 1
+ /* See https://github.com/mity/md4c/issues/6
+ *
+ * This ugly checking tests we are in (yet empty) list item but not
+ * its very first line (with the list item mark).
+ *
+ * If we are such blank line, then any following non-blank line
+ * which would be part of this list item actually ends the list
+ * because "a list item can begin with at most one blank line."
+ */
+ if(n_parents > 0 && ctx->containers[n_parents-1].ch != _T('>') &&
+ n_brothers + n_children == 0 && ctx->current_block == NULL &&
+ ctx->n_block_bytes > sizeof(MD_BLOCK))
+ {
+ MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+ if(top_block->type == MD_BLOCK_LI)
+ ctx->last_list_item_starts_with_two_blank_lines = TRUE;
+ }
+#endif
}
goto done;
} else {
+#if 1
+ /* This is 2nd half of the hack. If the flag is set (that is there
+ * were 2nd blank line at the start of the list item) and we would also
+ * belonging to such list item, then interrupt the list. */
ctx->last_line_has_list_loosening_effect = FALSE;
+ if(ctx->last_list_item_starts_with_two_blank_lines) {
+ if(n_parents > 0 && ctx->containers[n_parents-1].ch != _T('>') &&
+ n_brothers + n_children == 0 && ctx->current_block == NULL &&
+ ctx->n_block_bytes > sizeof(MD_BLOCK))
+ {
+ MD_BLOCK* top_block = (MD_BLOCK*) ((char*)ctx->block_bytes + ctx->n_block_bytes - sizeof(MD_BLOCK));
+ if(top_block->type == MD_BLOCK_LI)
+ n_parents--;
+ }
+
+ ctx->last_list_item_starts_with_two_blank_lines = FALSE;
+ }
+#endif
}
/* Check whether we are Setext underline. */