[gnome-builder] snippets: add helper to parse a single snippet body

[Christian Hergert <chergert src gnome org>]

commit 34f0733635c975b56c223ccf08b7bde60ea9079e
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 2 20:31:54 2020 -0800

    snippets: add helper to parse a single snippet body

 src/libide/sourceview/ide-snippet-parser.c | 62 ++++++++++++++++++++++++++++++
 src/libide/sourceview/ide-snippet-parser.h |  4 ++
 2 files changed, 66 insertions(+)
---
diff --git a/src/libide/sourceview/ide-snippet-parser.c b/src/libide/sourceview/ide-snippet-parser.c
index f094b9f1d..be91f00ab 100644
--- a/src/libide/sourceview/ide-snippet-parser.c
+++ b/src/libide/sourceview/ide-snippet-parser.c
@@ -723,3 +723,65 @@ ide_snippet_parser_init (IdeSnippetParser *parser)
   parser->scope = NULL;
   parser->cur_desc = NULL;
 }
+
+/**
+ * ide_snippet_parser_parse_one:
+ * @data: the data to parse
+ * @data_len: the length of data, or -1 for %NULL terminated
+ * @error: a location for an error
+ *
+ * Returns: (transfer full): an #IdeSnippet
+ *
+ * Since: 3.36
+ */
+IdeSnippet *
+ide_snippet_parser_parse_one (const char  *data,
+                              gssize       data_len,
+                              GError     **error)
+{
+  g_autoptr(IdeSnippetParser) parser = NULL;
+  IdeLineReader reader;
+  const gchar *line;
+  gsize line_len;
+
+  g_return_val_if_fail (data != NULL, NULL);
+
+  parser = ide_snippet_parser_new ();
+  ide_snippet_parser_feed_line (parser, "", "snippet dummy");
+
+  ide_line_reader_init (&reader, (gchar *)data, data_len);
+  while ((line = ide_line_reader_next (&reader, &line_len)))
+    {
+      g_autofree gchar *copy = NULL;
+
+      if (parser->had_error)
+        {
+          g_set_error (error,
+                       G_IO_ERROR,
+                       G_IO_ERROR_INVALID_DATA,
+                       "<data>:%d: invalid snippet",
+                       parser->lineno);
+          return NULL;
+        }
+
+      copy = g_malloc (line_len + 2);
+      copy[0] = '\t';
+      memcpy (&copy[1], line, line_len);
+      copy[1+line_len] = 0;
+
+      ide_snippet_parser_feed_line (parser, "", copy);
+    }
+
+  ide_snippet_parser_finish (parser);
+
+  if (parser->snippets != NULL)
+    return g_object_ref (parser->snippets->data);
+
+  g_set_error (error,
+               G_IO_ERROR,
+               G_IO_ERROR_INVALID_DATA,
+               "<data>:%d: invalid snippet",
+               parser->lineno);
+
+  return NULL;
+}
diff --git a/src/libide/sourceview/ide-snippet-parser.h b/src/libide/sourceview/ide-snippet-parser.h
index c45662273..2151b2915 100644
--- a/src/libide/sourceview/ide-snippet-parser.h
+++ b/src/libide/sourceview/ide-snippet-parser.h
@@ -49,5 +49,9 @@ gboolean          ide_snippet_parser_load_from_file (IdeSnippetParser  *parser,
                                                      GError           **error);
 IDE_AVAILABLE_IN_3_32
 GList            *ide_snippet_parser_get_snippets   (IdeSnippetParser  *parser);
+IDE_AVAILABLE_IN_3_36
+IdeSnippet       *ide_snippet_parser_parse_one      (const char        *data,
+                                                     gssize             data_len,
+                                                     GError           **error);
 
 G_END_DECLS