1 files changed, 51 insertions, 0 deletions
diff --git a/src/nvim/api/private/helpers.c b/src/nvim/api/private/helpers.c
index 13f77d2d85..e0d5862e02 100644
--- a/src/nvim/api/private/helpers.c
+++ b/src/nvim/api/private/helpers.c
@@ -15,6 +15,8 @@
 #include "nvim/lua/executor.h"
 #include "nvim/ascii.h"
 #include "nvim/assert.h"
+#include "nvim/charset.h"
+#include "nvim/syntax.h"
 #include "nvim/vim.h"
 #include "nvim/buffer.h"
 #include "nvim/window.h"
@@ -1579,3 +1581,52 @@ bool extmark_get_index_from_obj(buf_T *buf, Integer ns_id, Object obj, int
     return false;
   }
 }
+
+VirtText parse_virt_text(Array chunks, Error *err)
+{
+  VirtText virt_text = KV_INITIAL_VALUE;
+  for (size_t i = 0; i < chunks.size; i++) {
+    if (chunks.items[i].type != kObjectTypeArray) {
+      api_set_error(err, kErrorTypeValidation, "Chunk is not an array");
+      goto free_exit;
+    }
+    Array chunk = chunks.items[i].data.array;
+    if (chunk.size == 0 || chunk.size > 2
+        || chunk.items[0].type != kObjectTypeString
+        || (chunk.size == 2 && chunk.items[1].type != kObjectTypeString)) {
+      api_set_error(err, kErrorTypeValidation,
+                    "Chunk is not an array with one or two strings");
+      goto free_exit;
+    }
+
+    String str = chunk.items[0].data.string;
+    char *text = transstr(str.size > 0 ? str.data : "");  // allocates
+
+    int hl_id = 0;
+    if (chunk.size == 2) {
+      String hl = chunk.items[1].data.string;
+      if (hl.size > 0) {
+        hl_id = syn_check_group((char_u *)hl.data, (int)hl.size);
+      }
+    }
+    kv_push(virt_text, ((VirtTextChunk){ .text = text, .hl_id = hl_id }));
+  }
+
+  return virt_text;
+
+free_exit:
+  clear_virttext(&virt_text);
+  return virt_text;
+}
+
+bool api_is_truthy(Object obj, const char *what, Error *err)
+{
+  if (obj.type == kObjectTypeBoolean) {
+    return obj.data.boolean;
+  } else if (obj.type == kObjectTypeInteger) {
+    return obj.data.integer;  // C semantics: non-zery int is true
+  } else {
+    api_set_error(err, kErrorTypeValidation, "%s is not an boolean", what);
+    return false;
+  }
+}