From c8c3b3d8b2755bddb5c9562ead12d659c31f3090 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michael=20G=C3=B6hler?= <somebody.here@gmx.de>
Date: Sun, 17 Aug 2014 13:13:48 +0200
Subject: [PATCH] added header detection + test

---
 include/markdown.h |  1 +
 markdown_io.c      | 26 +++++++++++++++++++++++++-
 sample.md          |  6 +++---
 tmp.c              | 13 +++++++++++++
 4 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/include/markdown.h b/include/markdown.h
index ee6dff7..4d5105c 100644
--- a/include/markdown.h
+++ b/include/markdown.h
@@ -49,6 +49,7 @@ page_t *next_page(page_t *prev);
 document_t *new_document();
 int is_utf8(char ch);
 int next_nonblank(cstring_t *text, int i);
+int next_blank(cstring_t *text, int i);
 document_t *markdown_load(FILE *input);
 
 #endif // !defined( MARKDOWN_H )
diff --git a/markdown_io.c b/markdown_io.c
index 58c7f3a..ba2ff7a 100644
--- a/markdown_io.c
+++ b/markdown_io.c
@@ -74,7 +74,25 @@ document_t *markdown_load(FILE *input) {
         }
     }
 
-    //TODO detect header
+    // detect header
+    line = doc->page->line;
+    if(line && line->text->size > 0 && line->text->text[0] == '%') {
+
+        // assign header to document
+        doc->header = line;
+
+        // find first non-header line
+        while(line->text->size > 0 && line->text->text[0] == '%') {
+            line = line->next;
+        }
+
+        // split linked list
+        line->prev->next = (void*)0;
+        line->prev = (void*)0;
+
+        // remove header lines from page
+        doc->page->line = line;
+    }
 
     return doc;
 }
@@ -133,3 +151,9 @@ int next_nonblank(cstring_t *text, int i) {
     return i;
 };
 
+int next_blank(cstring_t *text, int i) {
+    while ((i < text->size) && !isspace((text->text)[i]))
+        ++i;
+    return i;
+};
+
diff --git a/sample.md b/sample.md
index fa4bad7..dfb2d1a 100644
--- a/sample.md
+++ b/sample.md
@@ -1,6 +1,6 @@
-@title: Sample Presentation
-@author: Michael Göhler
-@date: 2014-08-07
+%title: Sample Presentation
+%author: Michael Göhler
+%date: 2014-08-07
 
 Title
 =====
diff --git a/tmp.c b/tmp.c
index b908834..805cb3e 100644
--- a/tmp.c
+++ b/tmp.c
@@ -27,6 +27,19 @@ int main(int argc, char *argv[]) {
     doc = markdown_load(input);
 
     // test line/page load
+    int offset;
+    line_t *header;
+    if(doc->header) {
+        header = doc->header;
+        while(header &&
+              header->text->size > 0 &&
+              header->text->text[0] == '%') {
+
+            offset = next_blank(header->text, 0) + 1;
+            printf("header: %s\n", &header->text->text[offset]);
+            header = header->next;
+        }
+    }
     int cp = 0, cl = 0;
     page_t *page = doc->page;
     line_t *line;
-- 
2.20.1