From 8696abbe1df9bcc3abe3926a0ea6c9788ae94f58 Mon Sep 17 00:00:00 2001
From: Silvan Jegen <s.jegen@gmail.com>
Date: Mon, 16 May 2016 13:00:59 +0200
Subject: vis: add completion for file names in current directory via
 <C-x><C-f>

---
 config.def.h |  1 +
 main.c       | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/config.def.h b/config.def.h
index c6285e1..af5d8e3 100644
--- a/config.def.h
+++ b/config.def.h
@@ -320,6 +320,7 @@ static const KeyBinding bindings_insert[] = {
 	{ "<C-i>",              ALIAS("<Tab>")                              },
 	{ "<C-j>",              ALIAS("<Enter>")                            },
 	{ "<C-n>",              ACTION(COMPLETE_WORD)                       },
+	{ "<C-x><C-f>",         ACTION(COMPLETE_FILENAME)                   },
 	{ "<C-m>",              ALIAS("<Enter>")                            },
 	{ "<C-o>",              ACTION(MODE_OPERATOR_PENDING)               },
 	{ "<C-r>",              ACTION(INSERT_REGISTER)                     },
diff --git a/main.c b/main.c
index 995ac72..6baff3b 100644
--- a/main.c
+++ b/main.c
@@ -127,6 +127,8 @@ static const char *number_increment_decrement(Vis*, const char *keys, const Arg
 static const char *open_file_under_cursor(Vis*, const char *keys, const Arg *arg);
 /* complete input text at cursor based on the words in the current file */
 static const char *complete_word(Vis*, const char *keys, const Arg *arg);
+/* complete input text at cursor based on file names of the current directory */
+static const char *complete_filename(Vis*, const char *keys, const Arg *arg);
 
 enum {
 	VIS_ACTION_EDITOR_SUSPEND,
@@ -310,6 +312,7 @@ enum {
 	VIS_ACTION_OPEN_FILE_UNDER_CURSOR,
 	VIS_ACTION_OPEN_FILE_UNDER_CURSOR_NEW_WINDOW,
 	VIS_ACTION_COMPLETE_WORD,
+	VIS_ACTION_COMPLETE_FILENAME,
 	VIS_ACTION_NOP,
 };
 
@@ -1219,6 +1222,11 @@ static const KeyAction vis_action[] = {
 		"Complete word in file",
 		complete_word,
 	},
+	[VIS_ACTION_COMPLETE_FILENAME] = {
+		"complete-filename",
+		"Complete file name",
+		complete_filename,
+	},
 	[VIS_ACTION_NOP] = {
 		"nop",
 		"Ignore key, do nothing",
@@ -2149,6 +2157,20 @@ static const char *complete_word(Vis *vis, const char *keys, const Arg *arg) {
 	return keys;
 }
 
+static const char *complete_filename(Vis *vis, const char *keys, const Arg *arg) {
+	Buffer cmd;
+	buffer_init(&cmd);
+	char *prefix = get_completion_prefix(vis);
+	if (prefix && buffer_printf(&cmd, "ls | grep '^%s' | sort | " VIS_MENU
+	    " | tr -d '\n' | sed 's/%s//'", prefix, prefix)) {
+		Filerange empty = text_range_new(0, 0);
+		insert_dialog_selection(vis, &empty, (const char*[]){ buffer_content0(&cmd), NULL });
+	}
+	buffer_release(&cmd);
+	free(prefix);
+	return keys;
+}
+
 static Vis *vis;
 
 static void signal_handler(int signum, siginfo_t *siginfo, void *context) {
-- 
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