added chapter 7

4 years ago · c45e5ce487
parent b6be708d5e
commit c45e5ce487
11 changed files with 407 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+/target
--- a/chapter5/.DS_Store
+++ b/chapter5/.DS_Store
--- a/chapter6/rstat/src/.DS_Store
+++ b/chapter6/rstat/src/.DS_Store
--- a/chapter7/tui/.DS_Store
+++ b/chapter7/tui/.DS_Store
--- a/chapter7/tui/.gitignore
+++ b/chapter7/tui/.gitignore
@ -0,0 +1 @@
+/target
--- a/chapter7/tui/Cargo.lock
+++ b/chapter7/tui/Cargo.lock
@ -0,0 +1,47 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "libc"
+version = "0.2.77"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f96b10ec2560088a8e76961b00d47107b3a625fecb76dedb29ee7ccbf98235"
+
+[[package]]
+name = "numtoa"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
+
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
+dependencies = [
+ "redox_syscall",
+]
+
+[[package]]
+name = "termion"
+version = "1.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c22cec9d8978d906be5ac94bceb5a010d885c626c4c8855721a4dbd20e3ac905"
+dependencies = [
+ "libc",
+ "numtoa",
+ "redox_syscall",
+ "redox_termios",
+]
+
+[[package]]
+name = "tui"
+version = "0.1.0"
+dependencies = [
+ "termion",
+]
--- a/chapter7/tui/Cargo.toml
+++ b/chapter7/tui/Cargo.toml
@ -0,0 +1,8 @@
+[package]
+name = "tui"
+version = "0.1.0"
+authors = ["peshwar9"]
+edition = "2018"
+
+[dependencies]
+termion = "1.5.5"
--- a/chapter7/tui/src/.DS_Store
+++ b/chapter7/tui/src/.DS_Store
--- a/chapter7/tui/src/bin/mouse-events.rs
+++ b/chapter7/tui/src/bin/mouse-events.rs
@ -0,0 +1,44 @@
+use std::io::{self, Write};
+use termion::cursor::{self, DetectCursorPos};
+use termion::event::*;
+use termion::input::{MouseTerminal, TermRead};
+use termion::raw::IntoRawMode;
+
+fn main() {
+    let stdin = io::stdin();
+    let mut stdout = MouseTerminal::from(io::stdout().into_raw_mode().unwrap());
+
+    writeln!(
+        stdout,
+        "{}{} Type q to exit.",
+        termion::clear::All,
+        termion::cursor::Goto(1, 1)
+    )
+    .unwrap();
+
+    for c in stdin.events() {
+        let evt = c.unwrap();
+        match evt {
+            Event::Key(Key::Char('q')) => break,
+            Event::Mouse(m) => match m {
+                MouseEvent::Press(_, a, b) | MouseEvent::Release(a, b) | MouseEvent::Hold(a, b) => {
+                    write!(stdout, "{}", cursor::Goto(a, b)).unwrap();
+                    let (x, y) = stdout.cursor_pos().unwrap();
+                    write!(
+                        stdout,
+                        "{}{}Cursor is at: ({},{}){}",
+                        cursor::Goto(5, 5),
+                        termion::clear::UntilNewline,
+                        x,
+                        y,
+                        cursor::Goto(a, b)
+                    )
+                    .unwrap();
+                }
+            },
+            _ => {}
+        }
+
+        stdout.flush().unwrap();
+    }
+}
--- a/chapter7/tui/src/bin/text-viewer1.rs
+++ b/chapter7/tui/src/bin/text-viewer1.rs
@ -0,0 +1,118 @@
+use std::env::args;
+use std::fs;
+use std::io::{stdin, stdout, Write};
+use termion::event::Key;
+use termion::input::TermRead;
+use termion::raw::IntoRawMode;
+use termion::{color, style};
+struct Doc {
+    lines: Vec<String>,
+}
+#[derive(Debug)]
+struct Coordinates {
+    pub x: usize,
+    pub y: usize,
+}
+struct TextViewer {
+    doc: Doc,
+    doc_length: usize,
+    cur_pos: Coordinates,
+    terminal_size: Coordinates,
+    file_name: String,
+}
+
+impl TextViewer {
+    fn init(file_name: &str) -> Self {
+        let mut doc_file = Doc { lines: vec![] };
+        let file_handle = fs::read_to_string(file_name).unwrap();
+        for doc_line in file_handle.lines() {
+            doc_file.lines.push(doc_line.to_string());
+        }
+        let mut doc_length = file_handle.lines().count();
+        if doc_length == 0 {
+            doc_file.lines.push("".into());
+            doc_length += 1;
+        }
+        let size = termion::terminal_size().unwrap();
+        Self {
+            doc: doc_file,
+            cur_pos: Coordinates {
+                x: 1,
+                y: doc_length,
+            },
+            doc_length: doc_length,
+            terminal_size: Coordinates {
+                x: size.0 as usize,
+                y: size.1 as usize,
+            },
+            file_name: file_name.into(),
+        }
+    }
+
+    fn show_document(&mut self) {
+        let pos = &self.cur_pos;
+        let (old_x, old_y) = (pos.x, pos.y);
+        print!("{}{}", termion::clear::All, termion::cursor::Goto(1, 1));
+        println!(
+            "{}{}Welcome to Super text viewer\r{}",
+            color::Bg(color::Black),
+            color::Fg(color::White),
+            style::Reset
+        );
+        for line in 0..self.doc_length {
+            println!("{}\r", self.doc.lines[line as usize]);
+        }
+
+        println!(
+            "{}",
+            termion::cursor::Goto(0, (self.terminal_size.y - 2) as u16),
+        );
+        println!(
+            "{}{} line-count={} Filename: {}{}",
+            color::Fg(color::Red),
+            style::Bold,
+            self.doc_length,
+            self.file_name,
+            style::Reset
+        );
+        self.set_pos(old_x, old_y);
+    }
+    fn set_pos(&mut self, x: usize, y: usize) {
+        self.cur_pos.x = x;
+        self.cur_pos.y = y;
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, (self.cur_pos.y) as u16)
+        );
+    }
+
+    fn run(&mut self) {
+        let mut stdout = stdout().into_raw_mode().unwrap();
+        let stdin = stdin();
+        for c in stdin.keys() {
+            match c.unwrap() {
+                Key::Ctrl('q') => {
+                    break;
+                }
+                _ => {}
+            }
+            stdout.flush().unwrap();
+        }
+    }
+}
+
+fn main() {
+    //Get arguments from command line
+    let args: Vec<String> = args().collect();
+    //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");
+        std::process::exit(0);
+    }
+    // Open file & load into struct
+    println!("{}", termion::cursor::Show);
+    // Initialize viewer
+    let mut viewer = TextViewer::init(&args[1]);
+    viewer.show_document();
+    viewer.run();
+}
--- a/chapter7/tui/src/bin/text-viewer2.rs
+++ b/chapter7/tui/src/bin/text-viewer2.rs
@ -0,0 +1,188 @@
+use std::env::args;
+use std::fs;
+use std::io::{stdin, stdout, Write};
+use termion::event::Key;
+use termion::input::TermRead;
+use termion::raw::IntoRawMode;
+use termion::{color, style};
+struct TextViewer {
+    doc: Doc,
+    doc_length: usize,
+    cur_pos: Coordinates,
+    terminal_size: Coordinates,
+    file_name: String,
+}
+impl TextViewer {
+    fn init(file_name: &str) -> Self {
+        let mut doc_file = Doc { lines: vec![] };
+        let file_handle = fs::read_to_string(file_name).unwrap();
+        for doc_line in file_handle.lines() {
+            doc_file.lines.push(doc_line.to_string());
+        }
+        let mut doc_length = file_handle.lines().count();
+        if doc_length == 0 {
+            doc_file.lines.push("".into());
+            doc_length += 1;
+        }
+        let size = termion::terminal_size().unwrap();
+        Self {
+            doc: doc_file,
+            cur_pos: Coordinates {
+                x: 1,
+                y: doc_length,
+            },
+            doc_length: doc_length,
+            terminal_size: Coordinates {
+                x: size.0 as usize,
+                y: size.1 as usize,
+            },
+            file_name: file_name.into(),
+        }
+    }
+
+    fn show_document(&mut self) {
+        let pos = &self.cur_pos;
+        let (old_x, old_y) = (pos.x, pos.y);
+        print!("{}{}", termion::clear::All, termion::cursor::Goto(1, 1));
+        println!(
+            "{}{}Welcome to Super text viewer\r{}",
+            color::Bg(color::Black),
+            color::Fg(color::White),
+            style::Reset
+        );
+        if self.doc_length < self.terminal_size.y {
+            for line in 0..self.doc_length {
+                println!("{}\r", self.doc.lines[line as usize]);
+            }
+        } else {
+            if pos.y <= self.terminal_size.y {
+                for line in 0..self.terminal_size.y - 3 {
+                    println!("{}\r", self.doc.lines[line as usize]);
+                }
+            } else {
+                for line in pos.y - (self.terminal_size.y - 3)..pos.y {
+                    println!("{}\r", self.doc.lines[line as usize]);
+                }
+            }
+        }
+        println!(
+            "{}",
+            termion::cursor::Goto(0, (self.terminal_size.y - 2) as u16),
+        );
+        println!(
+            "{}X={},Y={}, line-count={} Filename: {}{}",
+            color::Fg(color::Red),
+            old_x,
+            old_y,
+            self.doc_length,
+            self.file_name,
+            style::Reset
+        );
+        self.set_pos(old_x, old_y);
+    }
+    fn set_pos(&mut self, x: usize, y: usize) {
+        self.cur_pos.x = x;
+        self.cur_pos.y = y;
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, (self.cur_pos.y) as u16)
+        );
+    }
+    fn inc_x(&mut self) {
+        if self.cur_pos.x < self.terminal_size.x {
+            self.cur_pos.x += 1;
+        }
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, self.cur_pos.y as u16)
+        );
+    }
+    fn dec_x(&mut self) {
+        if self.cur_pos.x > 1 {
+            self.cur_pos.x -= 1;
+        }
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, self.cur_pos.y as u16)
+        );
+    }
+    fn inc_y(&mut self) {
+        if self.cur_pos.y < self.doc_length {
+            self.cur_pos.y += 1;
+        }
+
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, self.cur_pos.y as u16)
+        );
+    }
+    fn dec_y(&mut self) {
+        if self.cur_pos.y > 1 {
+            self.cur_pos.y -= 1;
+        }
+        println!(
+            "{}",
+            termion::cursor::Goto(self.cur_pos.x as u16, self.cur_pos.y as u16)
+        );
+    }
+
+    fn run(&mut self) {
+        let mut stdout = stdout().into_raw_mode().unwrap();
+        let stdin = stdin();
+        for c in stdin.keys() {
+            match c.unwrap() {
+                Key::Ctrl('q') => {
+                    break;
+                }
+                Key::Left => {
+                    self.dec_x();
+                    self.show_document();
+                }
+                Key::Right => {
+                    self.inc_x();
+                    self.show_document();
+                }
+                Key::Up => {
+                    self.dec_y();
+                    self.show_document();
+                }
+                Key::Down => {
+                    self.inc_y();
+                    self.show_document();
+                }
+                Key::Backspace => {
+                    self.dec_x();
+                }
+                _ => {}
+            }
+            stdout.flush().unwrap();
+        }
+    }
+}
+struct Doc {
+    lines: Vec<String>,
+}
+#[derive(Debug)]
+struct Coordinates {
+    pub x: usize,
+    pub y: usize,
+}
+fn main() {
+    //Get arguments from command line
+    let args: Vec<String> = args().collect();
+    //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");
+        std::process::exit(0);
+    }
+    // Clear full screen
+    println!("{}", termion::clear::All);
+    // Open file & load into struct
+    println!("{}", termion::cursor::Show);
+    println!("{}", termion::cursor::Goto(1, 1));
+    // Initialize editor
+    let mut editor = TextViewer::init(&args[1]);
+    editor.show_document();
+    editor.set_pos(1, 1);
+    editor.run();
+}