guess_language

Picks a [class@Language] for given file name and content type, according to the information in lang files.

Either filename or content_type may be null. This function can be used as follows:

```c GtkSourceLanguage *lang; GtkSourceLanguageManager *manager; lm = gtk_source_language_manager_get_default (); lang = gtk_source_language_manager_guess_language (manager, filename, NULL); gtk_source_buffer_set_language (buffer, lang); ```

or

```c GtkSourceLanguage *lang = NULL; GtkSourceLanguageManager *manager; gboolean result_uncertain; gchar *content_type;

content_type = g_content_type_guess (filename, NULL, 0, &result_uncertain); if (result_uncertain) { g_free (content_type); content_type = NULL; }

manager = gtk_source_language_manager_get_default (); lang = gtk_source_language_manager_guess_language (manager, filename, content_type); gtk_source_buffer_set_language (buffer, lang);

g_free (content_type); ```

etc. Use [method@Language.get_mime_types] and [method@Language.get_globs] if you need full control over file -> language mapping.

Parameters:

this	a LanguageManager.
filename	a filename in Glib filename encoding, or null.
content_type	a content type (as in GIO API), or null.

Returns:

a Language, or null if there is no suitable language for given filename and/or content_type. Return value is owned by this and should not be freed.