From 7ee14621b3850b9eaaf25d808004c75a34f34eb3 Mon Sep 17 00:00:00 2001
From: Garrit Franke <garrit@slashdev.space>
Date: Thu, 14 Jan 2021 18:38:19 +0100
Subject: [PATCH] Load file to buffer

---
 src/main.rs | 47 ++++++++++++++++++++++++++++++++---------------
 1 file changed, 32 insertions(+), 15 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 3de3ba8..046023c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,14 +4,16 @@ use crate::termion::cursor::DetectCursorPos;
 use std::fmt::Debug;
 use std::fmt::Display;
 use std::io::{stdin, stdout, Write};
+use std::path::Path;
 use termion::event::Key;
 use termion::input::TermRead;
 use termion::raw::IntoRawMode;
 use termion::screen::*;
 
-struct Editor {
+struct Editor<'a> {
     screen: Box<dyn Write>,
     mode: Mode,
+    file_path: Option<&'a Path>,
 }
 
 #[derive(Eq, PartialEq, Debug)]
@@ -20,22 +22,34 @@ enum Mode {
     Insert,
 }
 
-impl Editor {
-    pub fn new() -> Self {
-        let mut screen = AlternateScreen::from(stdout().into_raw_mode().unwrap());
-
-        write!(
-            screen,
-            "{}{}",
-            termion::clear::All,
-            termion::cursor::Goto(1, 1),
-        );
-
-        screen.flush().unwrap();
-        Self {
+impl<'a> Editor<'a> {
+    pub fn new(path: Option<&'a Path>) -> Self {
+        let screen = AlternateScreen::from(stdout().into_raw_mode().unwrap());
+        let mut s = Self {
             screen: Box::new(screen),
             mode: Mode::Normal,
+            file_path: path,
+        };
+        s.write(&termion::clear::All);
+        s.write(&termion::cursor::Goto(1, 1));
+
+        match path {
+            Some(p) => {
+                let file_contents = std::fs::read(p).expect("Could not read file");
+                for b in file_contents.iter() {
+                    if *b as char == '\n' {
+                        s.write_newline();
+                    } else {
+                        s.write(&(*b as char));
+                    }
+                }
+            }
+            None => {}
         }
+
+        s.flush();
+
+        s
     }
 
     pub fn write(&mut self, w: &dyn Display) {
@@ -82,7 +96,10 @@ impl Editor {
 
 fn main() {
     let stdin = stdin();
-    let mut editor = Editor::new();
+    let args: Vec<String> = std::env::args().collect();
+
+    let file_path = Path::new(args.get(1).expect("usage: rim <filename>"));
+    let mut editor = Editor::new(Some(file_path));
     editor.enter_mode(Mode::Normal);
     for c in stdin.keys() {
         let key = c.unwrap();
-- 
2.45.2