content-parser: source-parser: extract TITLE from content header

this patch implements support to using the first header found in source
file as the TITLE variable. please note that if the TITLE variable is
defined on the source file's variable section it takes precedence.

this patch changes the old behaviour and can break some users' websites.
if you have some '{% ifdef TITLE %}' blocks in your template, they will
evaluate to true if you don't defined TITLE manually, but have a header
in your content.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/blogc/content-parser.c b/src/blogc/content-parser.c
index 23586bb..415e5ee 100644
--- a/src/blogc/content-parser.c
+++ b/src/blogc/content-parser.c
@@ -674,7 +674,8 @@ blogc_is_ordered_list_item(const char *str, size_t prefix_len)
 
 
 char*
-blogc_content_parse(const char *src, size_t *end_excerpt, char **description)
+blogc_content_parse(const char *src, size_t *end_excerpt, char **title,
+    char **description)
 {
     // src is always nul-terminated.
     size_t src_len = strlen(src);
@@ -834,6 +835,8 @@ blogc_content_parse(const char *src, size_t *end_excerpt, char **description)
                     end = is_last && c != '\n' && c != '\r' ? src_len :
                         (real_end != 0 ? real_end : current);
                     tmp = bc_strndup(src + start, end - start);
+                    if (title != NULL && *title == NULL)
+                        *title = bc_strdup(tmp);
                     parsed = blogc_content_parse_inline(tmp);
                     slug = blogc_slugify(tmp);
                     if (slug == NULL)
@@ -915,10 +918,10 @@ blogc_content_parse(const char *src, size_t *end_excerpt, char **description)
                     for (bc_slist_t *l = lines; l != NULL; l = l->next)
                         bc_string_append_printf(tmp_str, "%s%s", l->data,
                             line_ending);
-                    // do not propagate description to blockquote parsing,
+                    // do not propagate title and description to blockquote parsing,
                     // because we just want paragraphs from first level of
                     // content.
-                    tmp = blogc_content_parse(tmp_str->str, NULL, NULL);
+                    tmp = blogc_content_parse(tmp_str->str, NULL, NULL, NULL);
                     bc_string_append_printf(rv, "<blockquote>%s</blockquote>%s",
                         tmp, line_ending);
                     free(tmp);