Adjust for different indices in SyncTex

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

main.c

@@ -118,8 +118,16 @@ main(int argc, char* argv[])
       return -1;
     }
 
-    const int line = MIN(INT_MAX, g_ascii_strtoll(split_fwd[0], NULL, 10));
-    const int column = MIN(INT_MAX, g_ascii_strtoll(split_fwd[1], NULL, 10));
+    int line = MIN(INT_MAX, g_ascii_strtoll(split_fwd[0], NULL, 10));
+    int column = MIN(INT_MAX, g_ascii_strtoll(split_fwd[1], NULL, 10));
+    /* SyncTeX starts indexing at 1, but we use 0 */
+    if (line > 0) {
+      --line;
+    }
+    if (column > 0) {
+      --column;
+    }
+
     const bool ret = zathura_dbus_synctex_position(real_path, split_fwd[2], line, column, synctex_pid);
     g_strfreev(split_fwd);
 

synctex.c

@@ -122,6 +122,10 @@ synctex_rectangles_from_position(const char* filename, const char* input_file,
     return NULL;
   }
 
+  /* We use indexes starting at 0 but SyncTeX uses 1 */
+  ++line;
+  ++column;
+
   synctex_scanner_t scanner = synctex_scanner_new_with_output_file(filename, NULL, 1);
   if (scanner == NULL) {
     girara_debug("Failed to create synctex scanner.");
@@ -187,3 +191,4 @@ synctex_rectangles_from_position(const char* filename, const char* input_file,
 
   return hitlist;
 }
+