From 12bab7f7bb8049763711ec48a9a7a81427a25a05 Mon Sep 17 00:00:00 2001
From: peshwar9 <par.esh1937@gmail.com>
Date: Wed, 25 Nov 2020 12:51:27 +0530
Subject: [PATCH] revisions for Chapter 7 FD

---
 chapter7/tui/src/bin/text-viewer1.rs | 4 ++++
 chapter7/tui/src/bin/text-viewer2.rs | 6 +++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/chapter7/tui/src/bin/text-viewer1.rs b/chapter7/tui/src/bin/text-viewer1.rs
index 6133322..f4f3b6f 100644
--- a/chapter7/tui/src/bin/text-viewer1.rs
+++ b/chapter7/tui/src/bin/text-viewer1.rs
@@ -104,6 +104,10 @@ impl TextViewer {
 fn main() {
     //Get arguments from command line
     let args: Vec<String> = args().collect();
+    if args.len() < 2 {
+        println!("Please provide file name as argument");
+        std::process::exit(0);
+    }
     //Check if file exists. If not, print error message and exit process
     if !std::path::Path::new(&args[1]).exists() {
         println!("File does not exist");
diff --git a/chapter7/tui/src/bin/text-viewer2.rs b/chapter7/tui/src/bin/text-viewer2.rs
index ca5e68b..3fee9c4 100644
--- a/chapter7/tui/src/bin/text-viewer2.rs
+++ b/chapter7/tui/src/bin/text-viewer2.rs
@@ -170,6 +170,10 @@ struct Coordinates {
 fn main() {
     //Get arguments from command line
     let args: Vec<String> = args().collect();
+    if args.len() < 2 {
+        println!("Please provide file name as argument");
+        std::process::exit(0);
+    }
     //Check if file exists. If not, print error message and exit process
     if !std::path::Path::new(&args[1]).exists() {
         println!("File does not exist");
@@ -182,7 +186,7 @@ fn main() {
     println!("{}", termion::cursor::Goto(1, 1));
     // Initialize editor
     let mut editor = TextViewer::init(&args[1]);
-    editor.show_document();
     editor.set_pos(1, 1);
+    editor.show_document();
     editor.run();
 }