From 9d6384a67dd6c2e86bbd060871644e06211cae16 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Mon, 18 Apr 2022 20:32:59 -0400
Subject: first implementation of v command

---
 more.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 46 insertions(+), 3 deletions(-)

diff --git a/more.c b/more.c
index 8db2d87..02d3e07 100644
--- a/more.c
+++ b/more.c
@@ -2,10 +2,13 @@
 #include <curses.h>
 #include <ctype.h>
 #include <errno.h>
+#include <libgen.h>
 #include <locale.h>
+#include <spawn.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/wait.h>
 #include <term.h>
 #include <unistd.h>
 #include <wordexp.h>
@@ -83,6 +86,46 @@ static void jump(struct more_file *mf)
 	}
 }
 
+static struct more_file more_invoke_editor(struct more_file *mf)
+{
+	extern char **environ;
+	char *editor = getenv("EDITOR");
+	if (editor == NULL) {
+		editor = "vi";
+	}
+
+	char line[64];
+	snprintf(line, sizeof(line), "%zd", mf->topline);
+	char *argv[] = { editor, "-c", line, mf->path, NULL };
+
+	char *base = editor;
+	char *slash = strrchr(editor, '/');
+	if (slash) {
+		base = slash + 1;
+	}
+
+	if (strcmp(base, "ex") && strcmp(base, "vi")) {
+		argv[1] = mf->path;
+		argv[2] = NULL;
+	}
+
+	struct more_file ret = *mf;
+
+	def_prog_mode();
+	reset_shell_mode();
+	pid_t pid;
+	if (posix_spawnp(&pid, editor, NULL, NULL, argv, environ) == 0) {
+		char *path = strdup(mf->path);
+		more_close(mf);
+		waitpid(pid, NULL, 0);
+		ret = more_open(path);
+		free(path);
+	}
+	reset_prog_mode();
+
+	return ret;
+}
+
 static struct more_file more_examine(struct more_file *mf)
 {
 	wprintw(more_status, "e");
@@ -237,7 +280,7 @@ static int more(const char *path)
 				//repeatsearch(-count);
 				break;
 
-			case ':': {
+			case ':':
 				waddch(more_status, c);
 				echo();
 				int c2 = wgetch(more_status);
@@ -268,10 +311,10 @@ static int more(const char *path)
 				default:
 					break;
 				}
-			}
+				break;
 
 			case 'v':
-				// invoke_editor();
+				more_invoke_editor(&mf);
 				break;
 
 			case '=':
-- 
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