CP437 support

pull/22/head
chris west 4 years ago
parent 06344f734a
commit 41324a0ff3

253
Cargo.lock generated

@ -4,403 +4,408 @@
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@ -38,6 +38,7 @@ termion = "1.5.5"
libc = "0.2.66"
atty = "0.2.14"
lazy_static = "1.4"
cp437 = "0.1.1"
tor-stream = { version = "0.2.0", optional = true }
native-tls = { version = "0.2", optional = true }

@ -0,0 +1,7 @@
/// Encoding of Gopher response. Only UTF8 and CP437 are supported.
pub(crate) enum Encoding {
/// Unicode
UTF8,
/// https://en.wikipedia.org/wiki/Code_page_437
CP437,
}

@ -74,7 +74,7 @@ pub struct Url<'a> {
/// Fetches a gopher URL and returns a tuple of:
/// (did tls work?, raw Gopher response)
pub fn fetch_url(url: &str, tls: bool, tor: bool) -> Result<(bool, String)> {
pub fn fetch_url(url: &str, tls: bool, tor: bool) -> Result<(bool, Vec<u8>)> {
let u = parse_url(url);
fetch(u.host, u.port, u.sel, tls, tor)
}
@ -87,13 +87,19 @@ pub fn fetch(
selector: &str,
tls: bool,
tor: bool,
) -> Result<(bool, String)> {
) -> Result<(bool, Vec<u8>)> {
let mut stream = request(host, port, selector, tls, tor)?;
let mut body = Vec::new();
stream.read_to_end(&mut body)?;
let mut out = String::from_utf8_lossy(&body).to_string();
clean_response(&mut out);
Ok((stream.is_tls(), out))
Ok((stream.is_tls(), body))
}
/// Turn a Gopher response from `fetch` into a UTF8 String, cleaning
/// up unprintable characters along the way.
pub fn response_to_string(res: &[u8]) -> String {
let mut s = String::from_utf8_lossy(res).to_string();
clean_response(&mut s);
s
}
/// Removes unprintable characters from Gopher response.

@ -43,6 +43,7 @@ pub mod color;
pub mod args;
pub mod bookmarks;
pub mod config;
mod encoding;
pub mod gopher;
pub mod help;
pub mod history;

@ -6,7 +6,7 @@ use std::{
env,
error::Error,
io::{self, stdout, Write},
panic, process,
panic, process, str,
};
fn main() {
@ -100,7 +100,7 @@ Once you've launched phetch, use `ctrl-h` to view the on-line help."
/// Print just the raw Gopher response.
fn print_raw(url: &str, tls: bool, tor: bool) -> Result<(), Box<dyn Error>> {
let (_, out) = gopher::fetch_url(url, tls, tor)?;
println!("{}", out);
println!("{}", gopher::response_to_string(&out));
Ok(())
}
@ -110,6 +110,7 @@ fn print_plain(url: &str, tls: bool, tor: bool) -> Result<(), Box<dyn Error>> {
let mut out = String::new();
let typ = gopher::type_for_url(url);
let (_, response) = gopher::fetch_url(url, tls, tor)?;
let response = gopher::response_to_string(&response);
match typ {
gopher::Type::Menu => {
let menu = menu::parse(url, response);

@ -4,10 +4,11 @@
use crate::{
config::Config,
encoding::Encoding,
terminal,
ui::{self, Action, Key, View, MAX_COLS, SCROLL_LINES},
};
use std::fmt;
use std::{borrow::Cow, fmt, str};
/// The Text View holds the raw Gopher response as well as information
/// about which lines should currently be displayed on screen.
@ -15,7 +16,7 @@ pub struct Text {
/// Gopher URL
url: String,
/// Gopher response
raw_response: String,
raw_response: Vec<u8>,
/// Current scroll offset, in rows
scroll: usize,
/// Number of lines
@ -30,6 +31,8 @@ pub struct Text {
pub tor: bool,
/// UI mode. Interactive (Run), Printing, Raw mode...
mode: ui::Mode,
/// Text Encoding of Response
encoding: Encoding,
/// Currently in wide mode?
pub wide: bool,
}
@ -54,7 +57,7 @@ impl View for Text {
}
fn raw(&self) -> &str {
self.raw_response.as_ref()
str::from_utf8(&self.raw_response).unwrap_or_default()
}
fn term_size(&mut self, cols: usize, rows: usize) {
@ -79,6 +82,7 @@ impl View for Text {
self.scroll = self.final_scroll();
Action::Redraw
}
Key::Ctrl('e') => self.toggle_encoding(),
Key::Down | Key::Ctrl('n') | Key::Char('n') | Key::Ctrl('j') | Key::Char('j') => {
if self.scroll < self.final_scroll() {
self.scroll += 1;
@ -138,8 +142,8 @@ impl View for Text {
} else {
self.lines
};
let iter = self
.raw_response
let response = self.encoded_response();
let iter = response
.split_terminator('\n')
.skip(self.scroll)
.take(limit);
@ -170,15 +174,19 @@ impl View for Text {
impl Text {
/// Create a Text View from a raw Gopher response and a few options.
pub fn from(url: &str, response: String, config: &Config, tls: bool) -> Text {
pub fn from(url: &str, response: Vec<u8>, config: &Config, tls: bool) -> Text {
let mut lines = 0;
let mut longest = 0;
let mut line_len = 0;
for line in response.split_terminator('\n') {
lines += 1;
let count = line.chars().count();
if count > longest {
longest = count;
for &b in &response {
line_len += 1;
if b == b'\n' {
if line_len > longest {
longest = line_len;
}
line_len = 0;
lines += 1;
}
}
@ -192,10 +200,34 @@ impl Text {
mode: config.mode,
tls,
tor: config.tor,
encoding: Encoding::UTF8,
wide: config.wide,
}
}
/// Toggle between our two encodings.
fn toggle_encoding(&mut self) -> Action {
if matches!(self.encoding, Encoding::UTF8) {
self.encoding = Encoding::CP437;
} else {
self.encoding = Encoding::UTF8;
}
Action::Redraw
}
/// Interpret `self.raw_response` according to `self.encoding`.
fn encoded_response(&self) -> Cow<str> {
if matches!(self.encoding, Encoding::CP437) {
let mut converted = String::with_capacity(self.raw_response.len());
for b in &self.raw_response {
converted.push_str(cp437::convert_byte(&b));
}
Cow::from(converted)
} else {
String::from_utf8_lossy(&self.raw_response)
}
}
/// Final `self.scroll` value.
fn final_scroll(&self) -> usize {
let padding = (self.size.1 as f64 * 0.9) as usize;

@ -268,7 +268,12 @@ impl UI {
};
let typ = gopher::type_for_url(&url);
match typ {
Type::Menu | Type::Search => Ok(Box::new(Menu::from(url, res, &self.config, tls))),
Type::Menu | Type::Search => Ok(Box::new(Menu::from(
url,
gopher::response_to_string(&res),
&self.config,
tls,
))),
Type::Text | Type::HTML => Ok(Box::new(Text::from(url, res, &self.config, tls))),
_ => Err(error!("Unsupported Gopher Response: {:?}", typ)),
}
@ -627,8 +632,8 @@ impl UI {
'r' => {
if let Some(view) = self.views.get(self.focused) {
let url = view.url();
let raw = view.raw().to_string();
let mut text = Text::from(url, raw, &self.config, view.is_tls());
let mut text =
Text::from(url, view.raw().into(), &self.config, view.is_tls());
text.wide = true;
self.add_view(Box::new(text));
}

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