CE edit KB_DELETE the following line

ce/edit.c

@@ -272,11 +272,26 @@ void edit_start (const char* file_path, const char* text) {
     case KB_DELETE:
       if (editor.mode == EDIT_MODE_NORMAL) {
         size_t len = gapbuffer_length (&editor.current_line->gb);
-        if (editor.cursor.col < len) {
-          gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
+        gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
 
+        if (editor.cursor.col < len) {
           if (editor.current_line->gb.gap_end < editor.current_line->gb.size)
             editor.current_line->gb.gap_end++;
+        } else {
+          if (editor.cursor.line > 0) {
+            struct list_node_link* next = editor.current_line->lines_link.next;
+            struct edit_line* next_line = list_entry (next, struct edit_line, lines_link);
+            size_t next_len = gapbuffer_length (&next_line->gb);
+
+            for (size_t i = 0; i < next_len; i++) {
+              char chr = gapbuffer_at (&next_line->gb, i);
+              gapbuffer_insert (&wrealloc, NULL, &editor.current_line->gb, chr);
+            }
+
+            list_remove (editor.lines, &next_line->lines_link);
+            free (next_line->gb.buffer);
+            free (next_line);
+          }
         }
       }
       break;

ce/gapbuffer.c

@@ -112,3 +112,10 @@ char* gapbuffer_string_at (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffe
   res[written] = '\0';
   return res;
 }
+
+char gapbuffer_at (struct gapbuffer* gb, size_t index) {
+  if (index < gb->gap_start)
+    return gb->buffer[index];
+  else
+    return gb->buffer[index + (gb->gap_end - gb->gap_start)];
+}

ce/gapbuffer.h

@@ -33,4 +33,6 @@ size_t gapbuffer_length (struct gapbuffer* gb);
 
 char* gapbuffer_string_at (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffer* gb, size_t pos);
 
+char gapbuffer_at (struct gapbuffer* gb, size_t index);
+
 #endif // _GAPBUFFER_H