Add command completion with tab key

In the command prompt, press <tab> to get a list of all available
commands and pick one (using vis-menu). This works also after typing the
first letters of a command (p.e. `:la<tab>`).

Co-authored-by: Matěj Cepl <mcepl@cepl.eu>

1 files changed, 8 insertions, 0 deletions

diff --git a/vis.h b/vis.h
index 2e66b77..01bf1a0 100644
--- a/vis.h
+++ b/vis.h
@@ -14,6 +14,7 @@ typedef struct Win Win;
 #include "text-regex.h"
 #include "libutf.h"
 #include "array.h"
+#include "buffer.h"
 
 #ifndef CONFIG_HELP
 #define CONFIG_HELP 1
@@ -1230,6 +1231,13 @@ bool vis_option_unregister(Vis *vis, const char *name);
 bool vis_prompt_cmd(Vis *vis, const char *cmd);
 
 /**
+ * Write newline separated list of available commands to ``buf``
+ * @param vis The editor instance.
+ * @param buf The buffer to write to.
+ */
+void vis_print_cmds(Vis*, Buffer *buf);
+
+/**
  * Pipe a given file range to an external process.
  * @param vis The editor instance.
  * @param file The file to pipe.