support Github style code formatting (#121)

[smdp.git] / src / parser.c

diff --git a/src/parser.c b/src/parser.c
index 465bdc1..615cc6e 100644 (file)
--- a/src/parser.c
+++ b/src/parser.c
@@ -158,7 +158,8 @@ deck_t *markdown_load(FILE *input, int noexpand) {
                 slide = next_slide(slide);
                 sc++;
 
-            } else if(CHECK_BIT(bits, IS_TILDE_CODE) &&
+            } else if((CHECK_BIT(bits, IS_TILDE_CODE) ||
+                      CHECK_BIT(bits, IS_GFM_CODE)) &&
                       CHECK_BIT(bits, IS_EMPTY)) {
                 // remove tilde code markers
                 (text->reset)(text);
@@ -400,6 +401,7 @@ int markdown_analyse(cstring_t *text, int prev) {
     static int unordered_list_level = 0;
     static int unordered_list_level_offset[] = {-1, -1, -1, -1};
     static int num_tilde_characters = 0;
+    static int num_backticks = 0;
 
     int i = 0;      // increment
     int bits = 0;   // markdown bits
@@ -447,6 +449,27 @@ int markdown_analyse(cstring_t *text, int prev) {
         return bits;
     }
 
+    // IS_GFM_CODE
+    if (wcsncmp(text->value, L"```", 3) == 0) {
+        int backticks_in_line = next_nonbacktick(text, 0);
+        if (backticks_in_line >= num_backticks) {
+            if (num_backticks > 0) {
+                num_backticks = 0;
+            } else {
+                num_backticks = backticks_in_line;
+            }
+            SET_BIT(bits, IS_EMPTY);
+            SET_BIT(bits, IS_GFM_CODE);
+            return bits;
+        }
+    }
+
+    if (num_backticks > 0) {
+        SET_BIT(bits, IS_CODE);
+        SET_BIT(bits, IS_GFM_CODE);
+        return bits;
+    }
+
     // IS_STOP
     if((offset < CODE_INDENT || !CHECK_BIT(prev, IS_CODE)) &&
        (!wcsncmp(&text->value[offset], L"<br>", 4) ||
@@ -831,3 +854,10 @@ int next_nontilde(cstring_t *text, int i) {
     return i;
 }
 
+int next_nonbacktick(cstring_t *text, int i) {
+    while ((i < text->size) && text->value[i] == L'`')
+        i++;
+
+    return i;
+}
+