mirror of
https://github.com/xvxx/phetch
synced 2024-11-10 13:10:54 +00:00
798 lines
25 KiB
Rust
798 lines
25 KiB
Rust
use crate::gopher::{self, Type};
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use crate::ui::{Action, Key, View, MAX_COLS, SCROLL_LINES};
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use std::{
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fmt,
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io::{stdout, Write},
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};
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pub struct Menu {
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pub url: String, // gopher url
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pub lines: Vec<Line>, // lines
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pub links: Vec<usize>, // links (index of line in lines vec)
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pub longest: usize, // size of the longest line
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pub raw: String, // raw response
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pub input: String, // user's inputted value
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pub link: usize, // selected link
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pub scroll: usize, // scrolling offset
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pub searching: bool, // search mode?
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pub size: (usize, usize), // cols, rows
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pub wide: bool, // in wide mode?
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}
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pub struct Line {
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pub name: String,
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pub url: String,
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pub typ: Type,
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pub link: usize, // link #, if any
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}
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// direction of a given link relative to the visible screen
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#[derive(PartialEq)]
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enum LinkPos {
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Above,
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Below,
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Visible,
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}
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impl fmt::Display for Menu {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.url())
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}
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}
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impl View for Menu {
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fn raw(&self) -> String {
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self.raw.to_string()
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}
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fn render(&self) -> String {
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self.render_lines()
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}
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fn respond(&mut self, key: Key) -> Action {
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self.process_key(key)
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}
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fn term_size(&mut self, cols: usize, rows: usize) {
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self.size = (cols, rows);
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}
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fn url(&self) -> String {
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self.url.to_string()
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}
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}
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impl Menu {
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pub fn from(url: String, response: String) -> Menu {
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Self::parse(url, response)
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}
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fn _cols(&self) -> usize {
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self.size.0
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}
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fn rows(&self) -> usize {
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self.size.1
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}
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fn link(&self, i: usize) -> Option<&Line> {
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if let Some(line) = self.links.get(i) {
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self.lines.get(*line)
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} else {
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None
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}
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}
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/// Is the given link visible on screen?
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fn is_visible(&self, link: usize) -> bool {
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self.link_visibility(link) == Some(LinkPos::Visible)
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}
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/// Where is the given link relative to the screen?
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fn link_visibility(&self, i: usize) -> Option<LinkPos> {
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if let Some(&pos) = self.links.get(i) {
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Some(if pos < self.scroll {
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LinkPos::Above
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} else if pos >= self.scroll + self.rows() - 1 {
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LinkPos::Below
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} else {
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LinkPos::Visible
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})
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} else {
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None
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}
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}
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fn render_lines(&self) -> String {
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let mut out = String::new();
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let (cols, rows) = self.size;
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macro_rules! push {
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($c:expr, $e:expr) => {{
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out.push_str("\x1b[");
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out.push_str($c);
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out.push_str("m");
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out.push_str(&$e);
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out.push_str("\x1b[0m");
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}};
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}
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let iter = self.lines.iter().skip(self.scroll).take(rows - 1);
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let longest = if self.longest > MAX_COLS {
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MAX_COLS
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} else {
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self.longest
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};
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let indent = if longest > cols {
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String::from("")
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} else {
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let left = (cols - longest) / 2;
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if left > 6 {
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" ".repeat(left - 6)
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} else {
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String::from("")
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}
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};
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for line in iter {
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if !self.wide {
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out.push_str(&indent);
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}
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if line.typ == Type::Info {
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out.push_str(" ");
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} else {
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if line.link == self.link {
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out.push_str("\x1b[97;1m*\x1b[0m")
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} else {
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out.push(' ');
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}
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out.push(' ');
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out.push_str("\x1b[95m");
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if line.link < 9 {
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out.push(' ');
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}
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out.push_str(&(line.link + 1).to_string());
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out.push_str(".\x1b[0m ");
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}
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// truncate long lines, instead of wrapping
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let name = if line.name.len() > MAX_COLS {
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line.name.chars().take(MAX_COLS).collect::<String>()
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} else {
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line.name.to_string()
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};
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match line.typ {
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Type::Text => push!("96", name),
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Type::Menu => push!("94", name),
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Type::Info => push!("93", name),
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Type::HTML => push!("92", name),
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Type::Error => push!("91", name),
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Type::Telnet => push!("4;97;90", name),
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Type::Telnet3270 | Type::Mirror | Type::CSOEntity => push!("107;30", name),
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typ if typ.is_download() => push!("4;97", name),
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_ => push!("0", name),
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}
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out.push('\n');
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}
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if self.searching {
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out.push_str(&self.render_input());
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}
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out
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}
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fn render_input(&self) -> String {
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format!(
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"{}Find:\x1b[0m {}{}{}",
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termion::cursor::Goto(1, self.rows() as u16),
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self.input,
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termion::cursor::Show,
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termion::clear::AfterCursor,
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)
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}
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fn redraw_input(&self) -> Action {
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if self.searching {
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print!("{}", self.render_input());
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} else {
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print!("{}{}", termion::clear::CurrentLine, termion::cursor::Hide);
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}
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stdout().flush();
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Action::None
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}
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fn action_page_down(&mut self) -> Action {
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let lines = self.lines.len();
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// fewer lines than visible rows, just select last link
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if lines < self.rows() {
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if !self.links.is_empty() {
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self.link = self.links.len() - 1;
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return Action::Redraw;
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}
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return Action::None;
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}
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let padding = self.padding_bottom();
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if self.scroll < padding {
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self.scroll += SCROLL_LINES;
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if self.scroll > padding {
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self.scroll = padding;
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if !self.links.is_empty() {
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self.link = self.links.len() - 1;
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return Action::Redraw;
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}
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}
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} else {
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if !self.links.is_empty() {
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self.link = self.links.len() - 1;
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return Action::Redraw;
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}
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}
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if let Some(dir) = self.link_visibility(self.link) {
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match dir {
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LinkPos::Above => {
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let scroll = self.scroll;
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if let Some(&pos) = self.links.iter().skip(self.link).find(|&&i| i >= scroll) {
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self.link = self.lines.get(pos).unwrap().link;
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return Action::Redraw;
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}
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}
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LinkPos::Below => {}
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LinkPos::Visible => {}
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}
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}
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Action::None
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}
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fn action_page_up(&mut self) -> Action {
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if self.scroll > 0 {
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if self.scroll > SCROLL_LINES {
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self.scroll -= SCROLL_LINES;
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} else {
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self.scroll = 0;
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}
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if self.link == 0 {
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return Action::Redraw;
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}
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if let Some(dir) = self.link_visibility(self.link) {
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match dir {
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LinkPos::Below => {
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let scroll = self.scroll;
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if let Some(&pos) = self
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.links
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.iter()
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.take(self.link)
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.rev()
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.find(|&&i| i < (self.rows() + scroll - 1))
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{
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self.link = self.lines.get(pos).unwrap().link;
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}
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}
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LinkPos::Above => {}
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LinkPos::Visible => {}
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}
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}
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Action::Redraw
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} else if self.link > 0 {
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self.link = 0;
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Action::Redraw
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} else {
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Action::None
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}
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}
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fn action_up(&mut self) -> Action {
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if self.link == 0 {
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return if self.scroll > 0 {
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self.scroll -= 1;
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Action::Redraw
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} else if !self.links.is_empty() {
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self.link = self.links.len() - 1;
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self.scroll_to(self.link);
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Action::Redraw
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} else {
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Action::None
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};
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}
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// if text is entered, find previous match
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if !self.input.is_empty() {
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if let Some(pos) = self.rlink_matching(self.link, &self.input) {
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return self.action_select_link(pos);
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} else {
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return Action::None;
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}
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}
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let new_link = self.link - 1;
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if let Some(dir) = self.link_visibility(new_link) {
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match dir {
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LinkPos::Above => {
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// scroll up by 1
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if self.scroll > 0 {
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self.scroll -= 1;
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}
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// select it if it's visible now
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if self.is_visible(new_link) {
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self.link = new_link;
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}
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}
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LinkPos::Below => {
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// jump to link....
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if let Some(&pos) = self.links.get(new_link) {
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self.scroll = pos;
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self.link = new_link;
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}
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}
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LinkPos::Visible => {
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// select next link up
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self.link = new_link;
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// scroll if we are within 5 lines of the top
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if let Some(&pos) = self.links.get(self.link) {
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if self.scroll > 0 && pos < self.scroll + 5 {
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self.scroll -= 1;
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}
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}
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}
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}
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Action::Redraw
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} else {
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Action::None
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}
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}
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// how many rows to pad with blank lines at the end of the page
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fn padding_bottom(&self) -> usize {
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let padding = (self.rows() as f64 * 0.9) as usize;
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if self.lines.len() > padding {
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self.lines.len() - padding
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} else {
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0
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}
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}
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// search through links to find a match based on the pattern,
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// starting at link position `start`. returns the link position.
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fn link_matching(&self, start: usize, pattern: &str) -> Option<usize> {
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self.link_match_with_iter(pattern, &mut self.links.iter().skip(start))
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}
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// search backwards
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fn rlink_matching(&self, start: usize, pattern: &str) -> Option<usize> {
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self.link_match_with_iter(pattern, &mut self.links.iter().take(start).rev())
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}
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fn link_match_with_iter<'a, T>(&self, pattern: &str, it: &mut T) -> Option<usize>
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where
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T: std::iter::Iterator<Item = &'a usize>,
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{
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let pattern = pattern.to_ascii_lowercase();
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for &pos in it {
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let line = self.lines.get(pos)?;
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if line.name.to_ascii_lowercase().contains(&pattern) {
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return Some(line.link);
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}
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}
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None
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}
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fn action_down(&mut self) -> Action {
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let new_link = self.link + 1;
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// no links or final link selected already
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if self.links.is_empty() || new_link >= self.links.len() {
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// if there are more rows, scroll down
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if self.lines.len() >= self.rows() && self.scroll < self.padding_bottom() {
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self.scroll += 1;
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return Action::Redraw;
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} else {
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// wrap around
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self.link = 0;
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self.scroll_to(self.link);
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return Action::Redraw;
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}
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}
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// if text is entered, find next match
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if !self.input.is_empty() {
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if let Some(pos) = self.link_matching(self.link + 1, &self.input) {
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return self.action_select_link(pos);
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} else {
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return Action::None;
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}
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}
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if self.link < self.links.len() {
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if let Some(dir) = self.link_visibility(new_link) {
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match dir {
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LinkPos::Above => {
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// jump to link....
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if let Some(&pos) = self.links.get(new_link) {
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self.scroll = pos;
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self.link = new_link;
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}
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}
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LinkPos::Below => {
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// scroll down by 1
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self.scroll += 1;
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// select it if it's visible now
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if self.is_visible(new_link) {
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self.link = new_link;
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}
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}
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LinkPos::Visible => {
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// select next link down
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self.link = new_link;
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// scroll if we are within 5 lines of the end
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if let Some(&pos) = self.links.get(self.link) {
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if self.lines.len() >= self.rows() // dont scroll if content too small
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&& pos >= self.scroll + self.rows() - 6
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{
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self.scroll += 1;
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}
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}
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}
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}
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Action::Redraw
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} else {
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Action::None
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}
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} else {
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Action::None
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}
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}
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fn action_select_link(&mut self, link: usize) -> Action {
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if let Some(&pos) = self.links.get(link) {
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if self.link_visibility(link) != Some(LinkPos::Visible) {
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if pos > 5 {
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self.scroll = pos - 5;
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} else {
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self.scroll = 0;
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}
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}
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self.link = link;
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Action::Redraw
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} else {
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Action::None
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}
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}
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fn action_follow_link(&mut self, link: usize) -> Action {
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self.action_select_link(link);
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self.action_open()
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}
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fn scroll_to(&mut self, link: usize) -> Action {
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if self.link_visibility(link) != Some(LinkPos::Visible) {
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if let Some(&pos) = self.links.get(link) {
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if pos > 5 {
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self.scroll = pos - 5;
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} else {
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self.scroll = 0;
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}
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return Action::Redraw;
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}
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}
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Action::None
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}
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fn action_open(&mut self) -> Action {
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// if the selected link isn't visible, jump to it:
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if !self.is_visible(self.link) {
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return self.scroll_to(self.link);
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}
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self.searching = false;
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self.input.clear();
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if let Some(line) = self.link(self.link) {
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let url = line.url.to_string();
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let (typ, _, _, _) = gopher::parse_url(&url);
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match typ {
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Type::Search => {
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let prompt = format!("{}> ", line.name);
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Action::Prompt(
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prompt.clone(),
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Box::new(move |query| {
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Action::Open(
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format!("{}{}", prompt, query),
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format!("{}?{}", url, query),
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)
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}),
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)
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}
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Type::Error => Action::Error(line.name.to_string()),
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Type::Telnet => Action::Error("Telnet support coming soon".into()),
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_ => Action::Open(line.name.to_string(), url),
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}
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} else {
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Action::None
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}
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}
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// self.searching == true
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fn process_search_mode_char(&mut self, c: char) -> Action {
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if c == '\n' {
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if self.link_matching(0, &self.input).is_some() {
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return self.action_open();
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} else {
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let input = self.input.clone();
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self.searching = false;
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self.input.clear();
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return Action::Error(format!("No links match: {}", input));
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}
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}
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self.input.push(c);
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if let Some(pos) = self.link_matching(0, &self.input) {
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self.action_select_link(pos)
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} else {
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self.redraw_input()
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}
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}
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fn process_key(&mut self, key: Key) -> Action {
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if self.searching {
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if let Key::Char(c) = key {
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return self.process_search_mode_char(c);
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}
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}
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match key {
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Key::Char('\n') => self.action_open(),
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Key::Up | Key::Ctrl('p') | Key::Char('p') | Key::Ctrl('k') | Key::Char('k') => {
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self.action_up()
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}
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Key::Down | Key::Ctrl('n') | Key::Char('n') | Key::Ctrl('j') | Key::Char('j') => {
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self.action_down()
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}
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Key::PageUp | Key::Ctrl('-') | Key::Char('-') => self.action_page_up(),
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Key::PageDown | Key::Ctrl(' ') | Key::Char(' ') => self.action_page_down(),
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Key::Char('f') | Key::Ctrl('f') | Key::Char('/') | Key::Char('i') | Key::Ctrl('i') => {
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self.searching = true;
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Action::Redraw
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}
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Key::Char('w') | Key::Ctrl('w') => {
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self.wide = !self.wide;
|
||
Action::Redraw
|
||
}
|
||
Key::Backspace | Key::Delete => {
|
||
if self.searching {
|
||
self.input.pop();
|
||
self.redraw_input()
|
||
} else {
|
||
Action::Keypress(key)
|
||
}
|
||
}
|
||
Key::Esc | Key::Ctrl('c') => {
|
||
if self.searching {
|
||
if self.input.is_empty() {
|
||
self.searching = false;
|
||
} else {
|
||
self.input.clear();
|
||
}
|
||
self.redraw_input()
|
||
} else {
|
||
Action::Keypress(key)
|
||
}
|
||
}
|
||
Key::Char(c) => {
|
||
if !c.is_digit(10) {
|
||
return Action::Keypress(key);
|
||
}
|
||
|
||
self.input.push(c);
|
||
// jump to number
|
||
let s = self
|
||
.input
|
||
.chars()
|
||
.take(self.input.len())
|
||
.collect::<String>();
|
||
if let Ok(num) = s.parse::<usize>() {
|
||
if num > 0 && num <= self.links.len() {
|
||
if self.links.len() < (num * 10) {
|
||
return self.action_follow_link(num - 1);
|
||
} else {
|
||
return self.action_select_link(num - 1);
|
||
}
|
||
}
|
||
}
|
||
|
||
Action::None
|
||
}
|
||
_ => Action::Keypress(key),
|
||
}
|
||
}
|
||
|
||
// parse gopher response into a Menu object
|
||
pub fn parse(url: String, raw: String) -> Menu {
|
||
let mut lines = vec![];
|
||
let mut links = vec![];
|
||
let mut longest = 0;
|
||
for line in raw.split_terminator('\n') {
|
||
if let Some(c) = line.chars().nth(0) {
|
||
let typ = match Type::from(c) {
|
||
Some(t) => t,
|
||
None => continue,
|
||
};
|
||
|
||
// assemble line info
|
||
let parts: Vec<&str> = line.split_terminator('\t').collect();
|
||
|
||
let mut name = String::from("");
|
||
if !parts[0].is_empty() {
|
||
name.push_str(&parts[0][1..]);
|
||
}
|
||
if name.len() > longest {
|
||
longest = name.len();
|
||
}
|
||
// check for URL:<url> syntax
|
||
if parts.len() > 1 && parts[1].starts_with("URL:") {
|
||
lines.push(Line {
|
||
name,
|
||
url: parts[1].trim_start_matches("URL:").to_string(),
|
||
typ,
|
||
link: links.len(),
|
||
});
|
||
if typ != Type::Info {
|
||
links.push(lines.len() - 1);
|
||
}
|
||
continue;
|
||
}
|
||
|
||
// assemble regular, gopher-style URL
|
||
let mut url = String::from("gopher://");
|
||
// host
|
||
if parts.len() > 2 {
|
||
url.push_str(parts[2]);
|
||
}
|
||
// port
|
||
if parts.len() > 3 {
|
||
let port = parts[3].trim_end_matches('\r');
|
||
if port != "70" {
|
||
url.push(':');
|
||
url.push_str(parts[3].trim_end_matches('\r'));
|
||
}
|
||
}
|
||
// auto-prepend gopher type to selector
|
||
if let Some(first_char) = parts[0].chars().nth(0) {
|
||
url.push_str("/");
|
||
url.push(first_char);
|
||
// add trailing / if the selector is blank
|
||
if parts.is_empty() || parts.len() > 1 && parts[1].is_empty() {
|
||
url.push('/');
|
||
}
|
||
}
|
||
// selector
|
||
if parts.len() > 1 {
|
||
let mut sel = parts[1].to_string();
|
||
if !sel.starts_with('/') {
|
||
sel.insert(0, '/');
|
||
}
|
||
url.push_str(&sel);
|
||
}
|
||
lines.push(Line {
|
||
name,
|
||
url,
|
||
typ,
|
||
link: links.len(),
|
||
});
|
||
if typ != Type::Info {
|
||
links.push(lines.len() - 1);
|
||
}
|
||
}
|
||
}
|
||
|
||
Menu {
|
||
url,
|
||
lines,
|
||
links,
|
||
longest,
|
||
raw,
|
||
input: String::new(),
|
||
link: 0,
|
||
scroll: 0,
|
||
searching: false,
|
||
size: (0, 0),
|
||
wide: false,
|
||
}
|
||
}
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
macro_rules! parse {
|
||
($s:literal) => {
|
||
Menu::parse("test".to_string(), $s.to_string());
|
||
};
|
||
}
|
||
|
||
#[test]
|
||
fn test_simple_menu() {
|
||
let menu = parse!(
|
||
"
|
||
i---------------------------------------------------------
|
||
1SDF PHLOGOSPHERE (297 phlogs) /phlogs/ gopher.club 70
|
||
1SDF GOPHERSPACE (1303 ACTIVE users) /maps/ sdf.org 70
|
||
i---------------------------------------------------------
|
||
"
|
||
);
|
||
assert_eq!(menu.lines.len(), 4);
|
||
assert_eq!(menu.links.len(), 2);
|
||
assert_eq!(menu.lines[1].url, "gopher://gopher.club/1/phlogs/");
|
||
assert_eq!(menu.lines[2].url, "gopher://sdf.org/1/maps/");
|
||
}
|
||
|
||
#[test]
|
||
fn test_no_path() {
|
||
let menu = parse!("1Circumlunar Space circumlunar.space 70");
|
||
assert_eq!(menu.links.len(), 1);
|
||
assert_eq!(menu.lines[0].url, "gopher://circumlunar.space/1/");
|
||
}
|
||
|
||
#[test]
|
||
fn test_find_links() {
|
||
let mut menu = parse!(
|
||
"
|
||
i________________________________G_O_P_H_E_R_______________________________ Err bitreich.org 70
|
||
iHelp us building a nice sorted directory of the gopherspace: Err bitreich.org 70
|
||
1THE GOPHER LAWN – THE gopher directory /lawn bitreich.org 70
|
||
i Err bitreich.org 70
|
||
1Gopher Tutorials Project /tutorials bitreich.org 70
|
||
i Err bitreich.org 70
|
||
iRun more gopherholes on tor! Err bitreich.org 70
|
||
1The Gopher Onion Initiative /onion bitreich.org 70
|
||
i Err bitreich.org 70
|
||
1You are missing a gopher client? Use our kiosk mode. /kiosk bitreich.org 70
|
||
hssh kiosk@bitreich.org URL:ssh://kiosk@bitreich.org bitreich.org 70
|
||
i Err bitreich.org 70
|
||
iFurther gopherspace links: Err bitreich.org 70
|
||
1The Gopher Project / gopherproject.org 70
|
||
7Search the global gopherspace at Veronica II /v2/vs gopher.floodgap.com 70
|
||
i Err bitreich.org 70
|
||
iBest viewed using: Err bitreich.org 70
|
||
1sacc /scm/sacc bitreich.org 70
|
||
1clic /scm/clic bitreich.org 70
|
||
i Err bitreich.org 70"
|
||
);
|
||
menu.term_size(80, 40);
|
||
|
||
assert_eq!(menu.links.len(), 9);
|
||
assert_eq!(menu.link(0).unwrap().url, "gopher://bitreich.org/1/lawn");
|
||
assert_eq!(
|
||
menu.link(1).unwrap().url,
|
||
"gopher://bitreich.org/1/tutorials"
|
||
);
|
||
assert_eq!(menu.link(2).unwrap().url, "gopher://bitreich.org/1/onion");
|
||
assert_eq!(menu.link(3).unwrap().url, "gopher://bitreich.org/1/kiosk");
|
||
assert_eq!(menu.link, 0);
|
||
|
||
let ssh = menu.link(4).unwrap();
|
||
assert_eq!(ssh.url, "ssh://kiosk@bitreich.org");
|
||
assert_eq!(ssh.typ, Type::HTML);
|
||
|
||
menu.action_down();
|
||
assert_eq!(menu.link, 1);
|
||
assert_eq!(menu.link(menu.link).unwrap().link, 1);
|
||
|
||
menu.action_down();
|
||
assert_eq!(menu.link, 2);
|
||
assert_eq!(menu.link(menu.link).unwrap().link, 2);
|
||
|
||
menu.action_page_down();
|
||
assert_eq!(menu.link, 8);
|
||
assert_eq!(menu.link(menu.link).unwrap().link, 8);
|
||
|
||
menu.action_up();
|
||
assert_eq!(menu.link, 7);
|
||
assert_eq!(menu.link(menu.link).unwrap().link, 7);
|
||
|
||
assert_eq!(menu.scroll, 0);
|
||
menu.action_page_up();
|
||
assert_eq!(menu.link, 0);
|
||
assert_eq!(menu.link(menu.link).unwrap().link, 0);
|
||
}
|
||
}
|