├── .github └── FUNDING.yml ├── .gitignore ├── Cargo.lock ├── Cargo.toml ├── README.md ├── cato.png ├── paper.png └── src ├── default.syncat ├── dirs.rs ├── main.rs ├── printer.rs ├── str_width.rs ├── table.rs ├── termpix.rs └── words.rs /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | # These are supported funding model platforms 2 | 3 | github: foxfriends 4 | patreon: # Replace with a single Patreon username 5 | open_collective: # Replace with a single Open Collective username 6 | ko_fi: foxfriends 7 | tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel 8 | community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry 9 | liberapay: # Replace with a single Liberapay username 10 | issuehunt: # Replace with a single IssueHunt username 11 | otechie: # Replace with a single Otechie username 12 | custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 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1500 | dependencies = [ 1501 | "zune-core", 1502 | ] 1503 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "paper-terminal" 3 | description = """ 4 | Writes a file to a paper in your terminal. Especially if that file is Markdown. 5 | """ 6 | repository = "https://github.com/foxfriends/paper-terminal" 7 | homepage = "https://github.com/foxfriends/paper-terminal" 8 | license = "MIT" 9 | readme = "README.md" 10 | version = "3.1.0" 11 | authors = ["Cameron Eldridge "] 12 | edition = "2024" 13 | categories = ["command-line-utilities"] 14 | 15 | [[bin]] 16 | name = "paper" 17 | path = "src/main.rs" 18 | 19 | [dependencies] 20 | clap = { version = "4.4", features = ["derive"] } 21 | terminal_size = "0.4" 22 | pulldown-cmark = "0.12" 23 | ansi_term = "0.12" 24 | image = "0.25" 25 | console = { version = "0.15", features = ["unicode-width"] } 26 | directories-next = "2.0" 27 | syncat-stylesheet = { version = "3.5.0", features = ["ansi_term"] } 28 | unicode-width = "0.2" 29 | cjk = "0.2" 30 | clap_complete = "4.5.40" 31 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | [syncat]: https://github.com/foxfriends/syncat 2 | [syncat stylesheets]: https://github.com/foxfriends/syncat-themes 3 | [foxfriends/paper-terminal]: https://github.com/foxfriends/paper-terminal 4 | [ttscoff/mdless]: https://github.com/ttscoff/mdless 5 | [lunaryorn/mdcat]: https://github.com/lunaryorn/mdcat 6 | 7 | # Paper terminal 8 | 9 | [![dependency status](https://deps.rs/repo/github/foxfriends/paper-terminal/status.svg)](https://deps.rs/repo/github/foxfriends/paper-terminal) 10 | 11 | 12 | 13 | See [paper.png](./paper.png) to see what this looks like! 14 | 15 | Writes a file to a paper in your terminal. *Especially* if that file is Markdown! Features supported 16 | include: 17 | 18 | 1. The usual text, and paragraphs with automatic line-wrapping. You can manually wrap with 19 | hard breaks as expected. 20 | 21 | Otherwise, paragraphs will be nicely spaced. 22 | 2. Headings 23 | 3. __Bold__ / *Italic* / *__Bold and Italic__* / ~~Strikethrough~~ 24 | 4. Lists 25 | * Ordered 26 | * Unordered 27 | * Nested 28 | 29 | Definition 30 | : This is a definition 31 | 32 | 5. Rules 33 | 6. `Inline code` 34 | 7. Code blocks, with [syncat][] integration for syntax highlighting. Note that you must install 35 | syncat and make the syncat executable available on your path for this to work. 36 | ```rust 37 | fn main() { 38 | println!("Hello world"); 39 | } 40 | ``` 41 | 8. Blockquotes 42 | 43 | > Blockquotes 44 | > > And even nested block quotes 45 | 46 | > [!IMPORTANT] 47 | > Also alert blockquotes 48 | 49 | 9. And even images! Here's a photo of my cat 50 | 51 | ![My cat. His name is Cato](./cato.png) 52 | 53 | 10. Task lists: 54 | - [x] Easy 55 | - [ ] Hard 56 | 11. Footnotes[^ft] 57 | 58 | [^ft]: This is the footnote! 59 | 60 | 12. Tables 61 | 62 | ## Comparison with other command line Markdown renderers 63 | 64 | Not a very good comparison... this is more of an example of a table! 65 | 66 | | Tool | CommonMark | Paper | Paging | Wrapping | Syntax | Images | Tables | Looks good\* | 67 | | :------------------- | :--------- | :---- | :----- | :------- | :--------- | :-------- | :----- | :----------- | 68 | | [foxfriends/paper-terminal][] | Yes | Yes | No | Yes | syncat | Pixelated | Yes | Yes | 69 | | [ttscoff/mdless][] | Yes | No | Yes | No | pygmentize | Sometimes | Yes | No | 70 | | [lunaryorn/mdcat][] | Yes | No | No | No | syntect | Sometimes | No | No | 71 | 72 | \* subjective 73 | 74 | ## Styling 75 | 76 | Paper uses [syncat stylesheets][] to allow full customization of styling. See the default stylesheet (`src/default.syncat`) 77 | as an example of how this works. To override the default styles, create `paper.syncat` in your active syncat theme. 78 | 79 | * Different scopes are represented as nodes, inspired by the corresponding HTML tag names. 80 | 81 | * `h1` through `h6` 82 | * `strong` 83 | * `emphasis` 84 | * `strikethrough` 85 | * `code` 86 | * `blockquote` (alert style blockquotes are represented separately, using the custom tags `note-blockquote`, `tip-blockquote`, `important-blockquote`, `warning-blockquote`, and `caution-blockquote`) 87 | * `ul`, `ol`, `li` 88 | * `dl`, `dt`, `dd` 89 | * `footnote-ref`, `footnote-def`, `footnote` 90 | * `table` 91 | * `caption` 92 | * `link` 93 | 94 | * The paper and shadow can be matched with `paper` and `shadow`. Styles applied to `paper` are applied to everything. 95 | * The `"prefix"` and `"suffix"` tokens can be used to match the decorations 96 | * List item bullets 97 | * Blockquote (and alert) markers 98 | * Code block margins 99 | * The `"lang-tag"` token matches the language name written in the bottom corner of the code block 100 | * You can apply styles to code blocks with a specific language by using the language name as the token 101 | 102 | For now, the prefix/suffix contents are not customizable, but this may be added in future if it is desired. 103 | 104 | ## Installation 105 | 106 | Paper can be installed from crates.io using Cargo: 107 | 108 | ```bash 109 | cargo install paper-terminal 110 | ``` 111 | 112 | ## Usage 113 | 114 | ```bash 115 | # Print the help 116 | paper --help 117 | 118 | # Render README.md 119 | paper README.md 120 | 121 | # Render README.md, with syntax highlighting 122 | paper README.md -s 123 | ``` 124 | 125 | ``` 126 | Prints papers in your terminal 127 | 128 | Usage: paper [OPTIONS] [FILE]... 129 | 130 | Arguments: 131 | [FILE]... Files to print 132 | 133 | Options: 134 | -m, --margin Margin (shortcut for horizontal and vertical margin set to the same value) [default: 6] 135 | --h-margin Horizontal margin (overrides --margin) 136 | --v-margin Vertical margin (overrides --margin) 137 | -w, --width The width of the paper (including the space used for the margin) [default: 92] 138 | -p, --plain Don't parse as Markdown, just render the plain text on a paper 139 | -t, --tab-length The length to consider tabs as [default: 4] 140 | -U, --hide-urls Hide link URLs 141 | -I, --no-images Disable drawing images 142 | -l, --left Position paper on the left edge of the terminal, instead of centred 143 | -r, --right Position paper on the right edge of the terminal, instead of centred 144 | -s, --syncat Use syncat to highlight code blocks. Requires you have syncat installed 145 | --dev Print in debug mode 146 | --completions Generate shell completions [possible values: bash, elvish, fish, powershell, zsh] 147 | -h, --help Print help 148 | ``` 149 | -------------------------------------------------------------------------------- /cato.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/foxfriends/paper-terminal/0f272698c8b11808932feddd3ae7e883aa61f881/cato.png -------------------------------------------------------------------------------- /paper.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/foxfriends/paper-terminal/0f272698c8b11808932feddd3ae7e883aa61f881/paper.png -------------------------------------------------------------------------------- /src/default.syncat: -------------------------------------------------------------------------------- 1 | shadow { 2 | background-color: brblack; 3 | } 4 | 5 | li & "prefix", 6 | blockquote & "prefix" { 7 | color: brblack; 8 | dim: true; 9 | } 10 | 11 | note-blockquote & "prefix" { 12 | color: blue; 13 | } 14 | 15 | tip-blockquote & "prefix" { 16 | color: green; 17 | } 18 | 19 | important-blockquote & "prefix" { 20 | color: purple; 21 | } 22 | 23 | warning-blockquote & "prefix" { 24 | color: yellow; 25 | } 26 | 27 | caution-blockquote & "prefix" { 28 | color: red; 29 | } 30 | 31 | rule { 32 | color: black; 33 | } 34 | 35 | strong { 36 | bold: true; 37 | } 38 | 39 | emphasis { 40 | italic: true; 41 | } 42 | 43 | strikethrough { 44 | strikethrough: true; 45 | } 46 | 47 | link { 48 | underline: true; 49 | } 50 | 51 | caption { 52 | underline: true; 53 | } 54 | 55 | h1 { 56 | bold: true; 57 | } 58 | 59 | h2 { 60 | bold: true; 61 | } 62 | 63 | h3 { 64 | bold: true; 65 | underline: true; 66 | } 67 | 68 | h4 { 69 | bold: true; 70 | underline: true; 71 | dim: true; 72 | } 73 | 74 | h5 { 75 | underline: true; 76 | } 77 | 78 | h6 { 79 | underline: true; 80 | dim: true; 81 | } 82 | 83 | dt { 84 | bold: true 85 | } 86 | 87 | code { 88 | background-color: black; 89 | color: white; 90 | } 91 | 92 | footnote-def, footnote-ref { 93 | color: brblack; 94 | dim: true; 95 | } 96 | 97 | codeblock *, 98 | codeblock * "prefix", 99 | codeblock * "suffix", { 100 | background-color: black; 101 | color: white; 102 | } 103 | 104 | codeblock * "lang-tag" { 105 | color: white; 106 | dim: true; 107 | } 108 | 109 | paper { 110 | background-color: white; 111 | color: black; 112 | } 113 | -------------------------------------------------------------------------------- /src/dirs.rs: -------------------------------------------------------------------------------- 1 | use directories_next::ProjectDirs; 2 | use std::path::PathBuf; 3 | 4 | fn syncat_directories() -> ProjectDirs { 5 | ProjectDirs::from("com", "cameldridge", "syncat").unwrap() 6 | } 7 | 8 | pub fn syncat_config() -> PathBuf { 9 | syncat_directories().config_dir().to_owned() 10 | } 11 | 12 | pub fn active_color() -> PathBuf { 13 | syncat_config().join("style").join("active") 14 | } 15 | -------------------------------------------------------------------------------- /src/main.rs: -------------------------------------------------------------------------------- 1 | use ansi_term::Style; 2 | use clap::{CommandFactory, Parser as _}; 3 | use clap_complete::Shell; 4 | use console::strip_ansi_codes; 5 | use pulldown_cmark::{Options, Parser}; 6 | use std::convert::TryInto; 7 | use std::fs; 8 | use std::io::{self, Read}; 9 | use std::path::PathBuf; 10 | use syncat_stylesheet::Stylesheet; 11 | use terminal_size::{Width, terminal_size}; 12 | 13 | mod dirs; 14 | mod printer; 15 | mod str_width; 16 | mod table; 17 | mod termpix; 18 | mod words; 19 | 20 | use printer::Printer; 21 | use str_width::str_width; 22 | use words::Words; 23 | 24 | /// Prints papers in your terminal 25 | #[derive(clap::Parser, Debug)] 26 | #[clap(name = "paper")] 27 | #[clap(rename_all = "kebab-case")] 28 | pub struct Opts { 29 | /// Margin (shortcut for horizontal and vertical margin set to the same value) 30 | #[structopt(short = 'm', long, default_value = "6")] 31 | pub margin: usize, 32 | 33 | /// Horizontal margin (overrides --margin) 34 | #[structopt(long)] 35 | pub h_margin: Option, 36 | 37 | /// Vertical margin (overrides --margin) 38 | #[structopt(long)] 39 | pub v_margin: Option, 40 | 41 | /// The width of the paper (including the space used for the margin) 42 | #[structopt(short = 'w', long, default_value = "92")] 43 | pub width: usize, 44 | 45 | /// Don't parse as Markdown, just render the plain text on a paper 46 | #[structopt(short = 'p', long)] 47 | pub plain: bool, 48 | 49 | /// The length to consider tabs as. 50 | #[structopt(short, long, default_value = "4")] 51 | pub tab_length: usize, 52 | 53 | /// Hide link URLs 54 | #[structopt(short = 'U', long)] 55 | pub hide_urls: bool, 56 | 57 | /// Disable drawing images 58 | #[structopt(short = 'I', long)] 59 | pub no_images: bool, 60 | 61 | /// Position paper on the left edge of the terminal, instead of centred. 62 | #[structopt(short = 'l', long)] 63 | pub left: bool, 64 | 65 | /// Position paper on the right edge of the terminal, instead of centred. 66 | #[structopt(short = 'r', long)] 67 | pub right: bool, 68 | 69 | /// Use syncat to highlight code blocks. Requires you have syncat installed. 70 | #[structopt(short, long)] 71 | pub syncat: bool, 72 | 73 | /// Print in debug mode 74 | #[structopt(long)] 75 | pub dev: bool, 76 | 77 | /// Files to print 78 | #[structopt(name = "FILE")] 79 | pub files: Vec, 80 | 81 | /// Generate shell completions 82 | #[structopt(long)] 83 | completions: Option, 84 | } 85 | 86 | fn normalize(tab_len: usize, source: &str) -> String { 87 | source 88 | .lines() 89 | .map(|line| { 90 | let mut len = 0; 91 | let line = strip_ansi_codes(line); 92 | if line.contains('\t') { 93 | line.chars() 94 | .flat_map(|ch| { 95 | if ch == '\t' { 96 | let missing = tab_len - (len % tab_len); 97 | len += missing; 98 | vec![' '; missing] 99 | } else { 100 | len += 1; 101 | vec![ch] 102 | } 103 | }) 104 | .collect::() 105 | .into() 106 | } else { 107 | line 108 | } 109 | }) 110 | .map(|line| format!("{}\n", line)) 111 | .collect::() 112 | } 113 | 114 | fn print(opts: Opts, sources: I) 115 | where 116 | I: Iterator>, 117 | { 118 | let h_margin = opts.h_margin.unwrap_or(opts.margin); 119 | let v_margin = opts.v_margin.unwrap_or(opts.margin); 120 | let terminal_width = terminal_size() 121 | .map(|(Width(width), _)| width) 122 | .unwrap_or(opts.width as u16) as usize; 123 | let width = usize::min(opts.width, terminal_width - 1); 124 | 125 | if width < h_margin * 2 + 40 { 126 | eprintln!("The width is too short!"); 127 | return; 128 | } 129 | 130 | let left_space = match (opts.left, opts.right) { 131 | (true, false) => "".to_owned(), 132 | (false, true) => " ".repeat(terminal_width.saturating_sub(width) - 1), 133 | _ => " ".repeat((terminal_width.saturating_sub(width)) / 2), 134 | }; 135 | 136 | let stylesheet = Stylesheet::from_file(dirs::active_color().join("paper.syncat")) 137 | .unwrap_or_else(|_| { 138 | include_str!("default.syncat") 139 | .parse::() 140 | .unwrap() 141 | }); 142 | let paper_style: Style = stylesheet 143 | .style(&"paper".into()) 144 | .unwrap_or_default() 145 | .try_into() 146 | .unwrap_or_default(); 147 | let shadow_style: Style = stylesheet 148 | .style(&"shadow".into()) 149 | .unwrap_or_default() 150 | .try_into() 151 | .unwrap_or_default(); 152 | let blank_line = format!("{}", paper_style.paint(" ".repeat(width))); 153 | let end_shadow = format!("{}", shadow_style.paint(" ")); 154 | let margin = format!("{}", paper_style.paint(" ".repeat(h_margin))); 155 | let available_width = width - 2 * h_margin; 156 | for source in sources { 157 | let source = match source { 158 | Ok(source) => normalize(opts.tab_length, &source), 159 | Err(error) => { 160 | println!("{}", error); 161 | continue; 162 | } 163 | }; 164 | if opts.plain { 165 | println!("{}{}", left_space, blank_line); 166 | for _ in 0..v_margin { 167 | println!("{}{}{}", left_space, blank_line, end_shadow); 168 | } 169 | 170 | for line in source.lines() { 171 | let mut buffer = String::new(); 172 | let mut indent = None; 173 | for word in Words::preserving_whitespace(line) { 174 | if str_width(&buffer) + str_width(&word) > available_width { 175 | println!( 176 | "{}{}{}{}{}{}", 177 | left_space, 178 | margin, 179 | paper_style.paint(&buffer), 180 | paper_style.paint( 181 | " ".repeat(available_width.saturating_sub(str_width(&buffer))) 182 | ), 183 | margin, 184 | shadow_style.paint(" "), 185 | ); 186 | buffer.clear(); 187 | } 188 | if buffer.is_empty() { 189 | if indent.is_none() { 190 | let indent_len = 191 | word.chars().take_while(|ch| ch.is_whitespace()).count(); 192 | indent = Some(word[0..indent_len].to_string()); 193 | } 194 | buffer.push_str(indent.as_ref().unwrap()); 195 | buffer.push_str(word.trim()); 196 | } else { 197 | buffer.push_str(&word); 198 | } 199 | } 200 | println!( 201 | "{}{}{}{}{}{}", 202 | left_space, 203 | margin, 204 | paper_style.paint(&buffer), 205 | paper_style 206 | .paint(" ".repeat(available_width.saturating_sub(str_width(&buffer)))), 207 | margin, 208 | shadow_style.paint(" "), 209 | ); 210 | } 211 | for _ in 0..v_margin { 212 | println!("{}{}{}", left_space, blank_line, end_shadow); 213 | } 214 | println!("{} {}", left_space, shadow_style.paint(" ".repeat(width))); 215 | } else if opts.dev { 216 | let parser = Parser::new_ext(&source, Options::all()); 217 | for event in parser { 218 | println!("{:?}", event); 219 | } 220 | } else { 221 | let parser = Parser::new_ext(&source, Options::all()); 222 | println!("{}{}", left_space, blank_line); 223 | for _ in 0..v_margin { 224 | println!("{}{}{}", left_space, blank_line, end_shadow); 225 | } 226 | 227 | let mut printer = 228 | Printer::new(&left_space, &margin, available_width, &stylesheet, &opts); 229 | for event in parser { 230 | printer.handle(event); 231 | } 232 | 233 | for _ in 0..v_margin { 234 | println!("{}{}{}", left_space, blank_line, end_shadow); 235 | } 236 | println!("{} {}", left_space, shadow_style.paint(" ".repeat(width))); 237 | } 238 | } 239 | } 240 | 241 | fn main() { 242 | let opts = Opts::parse(); 243 | 244 | if opts.completions.is_some() { 245 | let shell = opts.completions.or_else(Shell::from_env).unwrap(); 246 | let mut opts = Opts::command(); 247 | let name = opts.get_name().to_string(); 248 | clap_complete::generate(shell, &mut opts, name, &mut std::io::stdout()); 249 | std::process::exit(0); 250 | } 251 | 252 | if opts.files.is_empty() { 253 | let mut string = String::new(); 254 | io::stdin().read_to_string(&mut string).unwrap(); 255 | print(opts, vec![Ok(string)].into_iter()); 256 | } else { 257 | let sources = opts 258 | .files 259 | .clone() 260 | .into_iter() 261 | .map(|path| fs::read_to_string(&path)); 262 | print(opts, sources); 263 | } 264 | } 265 | -------------------------------------------------------------------------------- /src/printer.rs: -------------------------------------------------------------------------------- 1 | use crate::str_width; 2 | use crate::table::Table; 3 | use crate::termpix; 4 | use crate::words::Words; 5 | use ansi_term::Style; 6 | use console::AnsiCodeIterator; 7 | use image::{self, GenericImageView as _}; 8 | use pulldown_cmark::{Alignment, BlockQuoteKind, CodeBlockKind, Event, HeadingLevel, Tag, TagEnd}; 9 | use std::convert::{TryFrom, TryInto}; 10 | use std::io::{Read as _, Write as _}; 11 | use std::process::{Command, Stdio}; 12 | use syncat_stylesheet::{Query, Stylesheet}; 13 | 14 | #[derive(Debug, PartialEq)] 15 | enum Scope { 16 | Paper, 17 | Indent, 18 | Italic, 19 | Bold, 20 | Strikethrough, 21 | Link { dest_url: String, title: String }, 22 | Caption, 23 | FootnoteDefinition, 24 | FootnoteReference, 25 | FootnoteContent, 26 | List(Option), 27 | DefinitionList, 28 | Term, 29 | Definition, 30 | ListItem(Option, bool), 31 | Code, 32 | CodeBlock(String), 33 | BlockQuote(Option), 34 | Table(Vec), 35 | TableHead, 36 | TableRow, 37 | TableCell, 38 | Heading(HeadingLevel), 39 | } 40 | 41 | impl Scope { 42 | fn prefix_len(&self) -> usize { 43 | match self { 44 | Scope::Indent => 4, 45 | Scope::FootnoteContent => 4, 46 | Scope::ListItem(..) => 4, 47 | Scope::CodeBlock(..) => 2, 48 | Scope::BlockQuote(..) => 4, 49 | Scope::Heading(HeadingLevel::H2) => 5, 50 | Scope::Heading(..) => 4, 51 | _ => 0, 52 | } 53 | } 54 | 55 | fn prefix(&mut self) -> String { 56 | match self { 57 | Scope::Indent => " ".to_owned(), 58 | Scope::FootnoteContent => " ".to_owned(), 59 | Scope::ListItem(Some(index), handled) => { 60 | if *handled { 61 | " ".to_owned() 62 | } else { 63 | *handled = true; 64 | format!("{: <4}", format!("{}.", index)) 65 | } 66 | } 67 | Scope::ListItem(None, handled) => { 68 | if *handled { 69 | " ".to_owned() 70 | } else { 71 | *handled = true; 72 | "• ".to_owned() 73 | } 74 | } 75 | Scope::CodeBlock(..) => " ".to_owned(), 76 | Scope::BlockQuote(..) => "┃ ".to_owned(), 77 | Scope::Heading(HeadingLevel::H2) => "├─── ".to_owned(), 78 | Scope::Heading(..) => " ".to_owned(), 79 | Scope::Definition => " ".to_owned(), 80 | _ => String::new(), 81 | } 82 | } 83 | 84 | fn suffix_len(&self) -> usize { 85 | match self { 86 | Scope::CodeBlock(..) => 2, 87 | Scope::Heading(HeadingLevel::H2) => 5, 88 | Scope::Heading(..) => 4, 89 | _ => 0, 90 | } 91 | } 92 | 93 | fn suffix(&mut self) -> String { 94 | match self { 95 | Scope::CodeBlock(..) => " ".to_owned(), 96 | Scope::Heading(HeadingLevel::H2) => " ───┤".to_owned(), 97 | Scope::Heading(..) => " ".to_owned(), 98 | _ => String::new(), 99 | } 100 | } 101 | 102 | fn name(&self) -> &'static str { 103 | use Scope::*; 104 | match self { 105 | Paper => "paper", 106 | Indent => "indent", 107 | Italic => "emphasis", 108 | Bold => "strong", 109 | Strikethrough => "strikethrough", 110 | Link { .. } => "link", 111 | Caption => "caption", 112 | FootnoteDefinition => "footnote-def", 113 | FootnoteReference => "footnote-ref", 114 | FootnoteContent => "footnote", 115 | List(Some(..)) => "ol", 116 | List(None) => "ul", 117 | DefinitionList => "dl", 118 | Term => "dt", 119 | Definition => "dd", 120 | ListItem(..) => "li", 121 | Code => "code", 122 | CodeBlock(..) => "codeblock", 123 | BlockQuote(None) => "blockquote", 124 | BlockQuote(Some(BlockQuoteKind::Note)) => "note-blockquote", 125 | BlockQuote(Some(BlockQuoteKind::Tip)) => "tip-blockquote", 126 | BlockQuote(Some(BlockQuoteKind::Important)) => "important-blockquote", 127 | BlockQuote(Some(BlockQuoteKind::Warning)) => "warning-blockquote", 128 | BlockQuote(Some(BlockQuoteKind::Caution)) => "caution-blockquote", 129 | Table(..) => "table", 130 | TableHead => "th", 131 | TableRow => "tr", 132 | TableCell => "td", 133 | Heading(HeadingLevel::H1) => "h1", 134 | Heading(HeadingLevel::H2) => "h2", 135 | Heading(HeadingLevel::H3) => "h3", 136 | Heading(HeadingLevel::H4) => "h4", 137 | Heading(HeadingLevel::H5) => "h5", 138 | Heading(HeadingLevel::H6) => "h6", 139 | } 140 | } 141 | } 142 | 143 | pub struct Printer<'a> { 144 | centering: &'a str, 145 | margin: &'a str, 146 | stylesheet: &'a Stylesheet, 147 | opts: &'a crate::Opts, 148 | width: usize, 149 | buffer: String, 150 | table: (Vec, Vec>), 151 | content: String, 152 | scope: Vec, 153 | empty_queued: bool, 154 | } 155 | 156 | impl<'a> Printer<'a> { 157 | pub fn new( 158 | centering: &'a str, 159 | margin: &'a str, 160 | width: usize, 161 | stylesheet: &'a Stylesheet, 162 | opts: &'a crate::Opts, 163 | ) -> Printer<'a> { 164 | Printer { 165 | centering, 166 | margin, 167 | width, 168 | stylesheet, 169 | opts, 170 | buffer: String::new(), 171 | table: (vec![], vec![]), 172 | content: String::new(), 173 | scope: vec![Scope::Paper], 174 | empty_queued: false, 175 | } 176 | } 177 | 178 | fn prefix_len(&self) -> usize { 179 | self.scope 180 | .iter() 181 | .fold(0, |len, scope| len + scope.prefix_len()) 182 | } 183 | 184 | fn suffix_len(&self) -> usize { 185 | self.scope 186 | .iter() 187 | .fold(0, |len, scope| len + scope.suffix_len()) 188 | } 189 | 190 | fn prefix(&mut self) -> (String, usize) { 191 | self.prefix2(None) 192 | } 193 | 194 | fn prefix2(&mut self, extra_scopes: Option<&[&str]>) -> (String, usize) { 195 | let stylesheet = self.stylesheet; 196 | self.scope 197 | .iter_mut() 198 | .scan(vec![], |scopes, scope| { 199 | scopes.push(scope.name()); 200 | let prefix = scope.prefix(); 201 | let mut all_scopes = scopes.clone(); 202 | all_scopes.append(&mut extra_scopes.unwrap_or(&[]).to_vec()); 203 | let style = Self::resolve_scopes(&stylesheet, &all_scopes, Some("prefix")); 204 | Some((format!("{}", style.paint(&prefix)), str_width(&prefix))) 205 | }) 206 | .fold((String::new(), 0), |(s, c), (s2, c2)| (s + &s2, c + c2)) 207 | } 208 | 209 | fn suffix(&mut self) -> (String, usize) { 210 | self.suffix2(None) 211 | } 212 | 213 | fn suffix2(&mut self, extra_scopes: Option<&[&str]>) -> (String, usize) { 214 | let stylesheet = self.stylesheet; 215 | self.scope 216 | .iter_mut() 217 | .scan(vec![], |scopes, scope| { 218 | scopes.push(scope.name()); 219 | let suffix = scope.suffix(); 220 | let mut all_scopes = scopes.clone(); 221 | all_scopes.append(&mut extra_scopes.unwrap_or(&[]).to_vec()); 222 | let style = Self::resolve_scopes(&stylesheet, &all_scopes, Some("suffix")); 223 | Some((format!("{}", style.paint(&suffix)), str_width(&suffix))) 224 | }) 225 | .fold((String::new(), 0), |(s, c), (s2, c2)| (s2 + &s, c + c2)) 226 | } 227 | 228 | fn style3(&self, extra_scopes: Option<&[&str]>, token: Option<&str>) -> Style { 229 | let mut scope_names: Vec<_> = self.scope.iter().map(Scope::name).collect(); 230 | if let Some(extras) = extra_scopes { 231 | scope_names.append(&mut extras.to_vec()); 232 | } 233 | Self::resolve_scopes(&self.stylesheet, &scope_names, token) 234 | } 235 | 236 | fn resolve_scopes(stylesheet: &Stylesheet, scopes: &[&str], token: Option<&str>) -> Style { 237 | if scopes.is_empty() { 238 | return Style::default(); 239 | } 240 | let mut query = Query::new(scopes[0], token.unwrap_or(scopes[0])); 241 | let mut index = vec![]; 242 | for scope in &scopes[1..] { 243 | query[&index[..]].add_child(Query::new(*scope, token.unwrap_or(scope))); 244 | index.push(0); 245 | } 246 | stylesheet 247 | .style(&query) 248 | .unwrap_or_default() 249 | .try_into() 250 | .unwrap_or_default() 251 | } 252 | 253 | fn style2(&self, token: Option<&str>) -> Style { 254 | self.style3(None, token) 255 | } 256 | 257 | fn style(&self) -> Style { 258 | self.style2(None) 259 | } 260 | 261 | fn shadow(&self) -> String { 262 | format!( 263 | "{}", 264 | Style::try_from(self.stylesheet.style(&"shadow".into()).unwrap_or_default()) 265 | .unwrap_or_default() 266 | .paint(" ") 267 | ) 268 | } 269 | 270 | fn paper_style(&self) -> Style { 271 | Style::try_from(self.stylesheet.style(&"paper".into()).unwrap_or_default()) 272 | .unwrap_or_default() 273 | } 274 | 275 | fn queue_empty(&mut self) { 276 | self.empty_queued = true; 277 | } 278 | 279 | fn empty(&mut self) { 280 | let (prefix, prefix_len) = self.prefix(); 281 | let (suffix, suffix_len) = self.suffix(); 282 | println!( 283 | "{}{}{}{}{}{}{}", 284 | self.centering, 285 | self.margin, 286 | prefix, 287 | self.paper_style().paint( 288 | " ".repeat( 289 | self.width 290 | .saturating_sub(prefix_len) 291 | .saturating_sub(suffix_len) 292 | ) 293 | ), 294 | suffix, 295 | self.margin, 296 | self.shadow(), 297 | ); 298 | self.empty_queued = false; 299 | } 300 | 301 | fn print_rule(&mut self) { 302 | let (prefix, prefix_len) = self.prefix(); 303 | let (suffix, suffix_len) = self.suffix(); 304 | println!( 305 | "{}{}{}{}{}{}{}", 306 | self.centering, 307 | self.margin, 308 | prefix, 309 | self.style().paint( 310 | "─".repeat( 311 | self.width 312 | .saturating_sub(prefix_len) 313 | .saturating_sub(suffix_len) 314 | ) 315 | ), 316 | suffix, 317 | self.margin, 318 | self.shadow(), 319 | ); 320 | } 321 | 322 | fn print_table(&mut self) { 323 | let alignments = if let Some(Scope::Table(alignments)) = self.scope.last() { 324 | alignments 325 | } else { 326 | return; 327 | }; 328 | let (heading, rows) = std::mem::replace(&mut self.table, (vec![], vec![])); 329 | let available_width = self 330 | .width 331 | .saturating_sub(self.prefix_len()) 332 | .saturating_sub(self.suffix_len()); 333 | let table_str = 334 | Table::new(heading, rows, available_width).print(self.paper_style(), alignments); 335 | for line in table_str.lines() { 336 | let (prefix, _) = self.prefix(); 337 | let (suffix, _) = self.suffix(); 338 | println!( 339 | "{}{}{}{}{}{}{}{}", 340 | self.centering, 341 | self.margin, 342 | line, 343 | prefix, 344 | self.paper_style() 345 | .paint(" ".repeat(available_width.saturating_sub(str_width(line)))), 346 | suffix, 347 | self.margin, 348 | self.shadow(), 349 | ); 350 | } 351 | } 352 | 353 | fn flush_buffer(&mut self) { 354 | match self.scope.last() { 355 | Some(Scope::CodeBlock(lang)) => { 356 | let language_context = if lang.is_empty() || !self.opts.syncat { 357 | String::from("txt") 358 | } else { 359 | lang.to_owned() 360 | }; 361 | let style = self.style3(Some(&[&language_context[..]]), None); 362 | let lang = lang.to_owned(); 363 | let mut first_prefix = Some(self.prefix2(Some(&[&language_context[..]]))); 364 | let mut first_suffix = Some(self.suffix2(Some(&[&language_context[..]]))); 365 | 366 | let available_width = self 367 | .width 368 | .saturating_sub(first_prefix.as_ref().unwrap().1) 369 | .saturating_sub(first_suffix.as_ref().unwrap().1); 370 | let buffer = std::mem::replace(&mut self.buffer, String::new()); 371 | let buffer = if self.opts.syncat { 372 | let syncat = Command::new("syncat") 373 | .args(&["-l", &lang, "-w", &available_width.to_string()]) 374 | .stdin(Stdio::piped()) 375 | .stdout(Stdio::piped()) 376 | .spawn(); 377 | match syncat { 378 | Ok(syncat) => { 379 | { 380 | let mut stdin = syncat.stdin.unwrap(); 381 | write!(stdin, "{}", buffer).unwrap(); 382 | } 383 | let mut output = String::new(); 384 | syncat.stdout.unwrap().read_to_string(&mut output).unwrap(); 385 | output 386 | } 387 | Err(error) => { 388 | eprintln!("{}", error); 389 | buffer.to_owned() 390 | } 391 | } 392 | } else { 393 | buffer 394 | .lines() 395 | .map(|mut line| { 396 | let mut output = String::new(); 397 | while str_width(&line) > available_width { 398 | let not_too_wide = { 399 | let mut acc = 0; 400 | move |ch: &char| { 401 | acc += str_width(&ch.to_string()); 402 | acc < available_width 403 | } 404 | }; 405 | let prefix = 406 | line.chars().take_while(not_too_wide).collect::(); 407 | output = format!("{}{}\n", output, prefix); 408 | line = &line[prefix.len()..]; 409 | } 410 | format!( 411 | "{}{}{}\n", 412 | output, 413 | line, 414 | " ".repeat(available_width.saturating_sub(str_width(&line))) 415 | ) 416 | }) 417 | .collect() 418 | }; 419 | 420 | let (prefix, _) = first_prefix 421 | .take() 422 | .unwrap_or_else(|| self.prefix2(Some(&[&language_context[..]]))); 423 | let (suffix, _) = first_suffix 424 | .take() 425 | .unwrap_or_else(|| self.suffix2(Some(&[&language_context[..]]))); 426 | println!( 427 | "{}{}{}{}{}{}{}", 428 | self.centering, 429 | self.margin, 430 | prefix, 431 | style.paint(" ".repeat(available_width)), 432 | suffix, 433 | self.margin, 434 | self.shadow(), 435 | ); 436 | 437 | for line in buffer.lines() { 438 | let width = str_width(line); 439 | let (prefix, _) = self.prefix2(Some(&[&language_context[..]])); 440 | let (suffix, _) = self.suffix2(Some(&[&language_context[..]])); 441 | print!( 442 | "{}{}{}{}", 443 | self.centering, 444 | self.margin, 445 | prefix, 446 | style.prefix(), 447 | ); 448 | for (s, is_ansi) in AnsiCodeIterator::new(line) { 449 | if is_ansi { 450 | if s == "\u{1b}[0m" { 451 | print!("{}{}", s, style.prefix()); 452 | } else { 453 | print!("{}{}", style.prefix(), s); 454 | } 455 | } else { 456 | print!("{}", s); 457 | } 458 | } 459 | println!( 460 | "{}{}{}{}", 461 | style.paint(" ".repeat(available_width.saturating_sub(width))), 462 | suffix, 463 | self.margin, 464 | self.shadow(), 465 | ); 466 | } 467 | 468 | let (prefix, _) = first_prefix 469 | .take() 470 | .unwrap_or_else(|| self.prefix2(Some(&[&language_context[..]]))); 471 | let (suffix, _) = first_suffix 472 | .take() 473 | .unwrap_or_else(|| self.suffix2(Some(&[&language_context[..]]))); 474 | println!( 475 | "{}{}{}{}{}{}{}", 476 | self.centering, 477 | self.margin, 478 | prefix, 479 | format!( 480 | "{}{}", 481 | style.paint(" ".repeat(available_width.saturating_sub(str_width(&lang)))), 482 | self.style3(Some(&[&language_context[..]]), Some("lang-tag")) 483 | .paint(lang) 484 | ), 485 | suffix, 486 | self.margin, 487 | self.shadow(), 488 | ); 489 | } 490 | _ => {} 491 | } 492 | } 493 | 494 | fn flush(&mut self) { 495 | if !self.buffer.is_empty() { 496 | return; 497 | } 498 | if self 499 | .scope 500 | .iter() 501 | .find(|scope| { 502 | if let Scope::Table(..) = scope { 503 | true 504 | } else { 505 | false 506 | } 507 | }) 508 | .is_some() 509 | { 510 | return; 511 | } 512 | if self.content.is_empty() { 513 | return; 514 | } 515 | let (prefix, prefix_len) = self.prefix(); 516 | let (suffix, suffix_len) = self.suffix(); 517 | println!( 518 | "{}{}{}{}{}{}{}{}", 519 | self.centering, 520 | self.margin, 521 | prefix, 522 | self.content, 523 | suffix, 524 | self.paper_style().paint( 525 | " ".repeat( 526 | self.width 527 | .saturating_sub(str_width(&self.content)) 528 | .saturating_sub(prefix_len) 529 | .saturating_sub(suffix_len) 530 | ) 531 | ), 532 | self.margin, 533 | self.shadow(), 534 | ); 535 | self.content.clear(); 536 | } 537 | 538 | fn target(&mut self) -> &mut String { 539 | if self 540 | .scope 541 | .iter() 542 | .find(|scope| *scope == &Scope::TableHead) 543 | .is_some() 544 | { 545 | self.table.0.last_mut().unwrap() 546 | } else if self 547 | .scope 548 | .iter() 549 | .find(|scope| *scope == &Scope::TableRow) 550 | .is_some() 551 | { 552 | self.table.1.last_mut().unwrap().last_mut().unwrap() 553 | } else { 554 | &mut self.content 555 | } 556 | } 557 | 558 | fn handle_text(&mut self, text: S) 559 | where 560 | S: AsRef, 561 | { 562 | let s = text.as_ref(); 563 | if let Some(Scope::CodeBlock(..)) = self.scope.last() { 564 | self.buffer += s; 565 | return; 566 | } 567 | let style = self.style(); 568 | for word in Words::new(s) { 569 | if str_width(&self.content) + word.len() + self.prefix_len() + self.suffix_len() 570 | > self.width 571 | { 572 | self.flush(); 573 | } 574 | let mut word = if self.target().is_empty() { 575 | word.trim() 576 | } else { 577 | &word 578 | }; 579 | let available_len = self 580 | .width 581 | .saturating_sub(self.prefix_len()) 582 | .saturating_sub(self.suffix_len()); 583 | while str_width(&self.content) + str_width(&word) > available_len { 584 | let part = word.chars().take(available_len).collect::(); 585 | self.target().push_str(&format!("{}", style.paint(&part))); 586 | word = &word[part.len()..]; 587 | self.flush(); 588 | } 589 | self.target().push_str(&format!("{}", style.paint(word))); 590 | } 591 | } 592 | 593 | pub fn handle(&mut self, event: Event) { 594 | match event { 595 | Event::Start(tag) => { 596 | if self.empty_queued { 597 | // TODO: queue an empty after an item's initial text when there's a block 598 | self.empty(); 599 | } 600 | match tag { 601 | Tag::MetadataBlock(..) => self.scope.push(Scope::CodeBlock("".to_owned())), 602 | Tag::HtmlBlock => {} 603 | Tag::Paragraph => { 604 | self.flush(); 605 | } 606 | Tag::Heading { 607 | level: HeadingLevel::H1, 608 | .. 609 | } => { 610 | self.flush(); 611 | self.print_rule(); 612 | self.scope.push(Scope::Heading(HeadingLevel::H1)); 613 | } 614 | Tag::Heading { level, .. } => { 615 | self.flush(); 616 | self.scope.push(Scope::Heading(level)); 617 | } 618 | Tag::BlockQuote(kind) => { 619 | self.flush(); 620 | self.scope.push(Scope::BlockQuote(kind)); 621 | match kind { 622 | None => {} 623 | Some(BlockQuoteKind::Note) => { 624 | let style = Self::resolve_scopes( 625 | &self.stylesheet, 626 | &["note-blockquote"], 627 | Some("prefix"), 628 | ); 629 | self.handle_text(&format!( 630 | "{} {}", 631 | style.paint("󰋽"), 632 | style.paint("Note") 633 | )); 634 | } 635 | Some(BlockQuoteKind::Tip) => { 636 | let style = Self::resolve_scopes( 637 | &self.stylesheet, 638 | &["tip-blockquote"], 639 | Some("prefix"), 640 | ); 641 | self.handle_text(&format!( 642 | "{} {}", 643 | style.paint("󰌶"), 644 | style.paint("Tip") 645 | )); 646 | } 647 | Some(BlockQuoteKind::Important) => { 648 | let style = Self::resolve_scopes( 649 | &self.stylesheet, 650 | &["important-blockquote"], 651 | Some("prefix"), 652 | ); 653 | self.handle_text(&format!( 654 | "{} {}", 655 | style.paint("󱋉"), 656 | style.paint("Important") 657 | )); 658 | } 659 | Some(BlockQuoteKind::Warning) => { 660 | let style = Self::resolve_scopes( 661 | &self.stylesheet, 662 | &["warning-blockquote"], 663 | Some("prefix"), 664 | ); 665 | self.handle_text(&format!( 666 | "{} {}", 667 | style.paint("󰀪"), 668 | style.paint("Warning") 669 | )); 670 | } 671 | Some(BlockQuoteKind::Caution) => { 672 | let style = Self::resolve_scopes( 673 | &self.stylesheet, 674 | &["caution-blockquote"], 675 | Some("prefix"), 676 | ); 677 | self.handle_text(&format!( 678 | "{} {}", 679 | style.paint("󰳦"), 680 | style.paint("Caution") 681 | )); 682 | } 683 | } 684 | } 685 | Tag::CodeBlock(CodeBlockKind::Indented) => { 686 | self.flush(); 687 | self.scope.push(Scope::CodeBlock("".to_owned())); 688 | } 689 | Tag::CodeBlock(CodeBlockKind::Fenced(language)) => { 690 | self.flush(); 691 | self.scope.push(Scope::CodeBlock(language.into_string())); 692 | } 693 | Tag::List(start_index) => { 694 | self.flush(); 695 | self.scope.push(Scope::List(start_index)); 696 | } 697 | Tag::DefinitionList => { 698 | self.flush(); 699 | self.scope.push(Scope::DefinitionList); 700 | } 701 | Tag::DefinitionListTitle => { 702 | self.flush(); 703 | self.scope.push(Scope::Term); 704 | } 705 | Tag::DefinitionListDefinition => { 706 | self.flush(); 707 | self.scope.push(Scope::Definition); 708 | } 709 | Tag::Item => { 710 | self.flush(); 711 | if let Some(&Scope::List(index)) = self.scope.last() { 712 | self.scope.push(Scope::ListItem(index, false)); 713 | } else { 714 | self.scope.push(Scope::ListItem(None, false)); 715 | } 716 | } 717 | Tag::FootnoteDefinition(text) => { 718 | self.flush(); 719 | self.scope.push(Scope::FootnoteDefinition); 720 | self.handle_text(&format!("{}:", text)); 721 | self.scope.pop(); 722 | self.flush(); 723 | self.scope.push(Scope::FootnoteContent); 724 | } 725 | Tag::Table(columns) => self.scope.push(Scope::Table(columns)), 726 | Tag::TableHead => { 727 | self.scope.push(Scope::TableHead); 728 | } 729 | Tag::TableRow => { 730 | self.scope.push(Scope::TableRow); 731 | self.table.1.push(vec![]); 732 | } 733 | Tag::TableCell => { 734 | self.scope.push(Scope::TableCell); 735 | if self 736 | .scope 737 | .iter() 738 | .find(|scope| *scope == &Scope::TableHead) 739 | .is_some() 740 | { 741 | self.table.0.push(String::new()); 742 | } else { 743 | self.table.1.last_mut().unwrap().push(String::new()); 744 | } 745 | } 746 | Tag::Emphasis => { 747 | self.scope.push(Scope::Italic); 748 | } 749 | Tag::Strong => { 750 | self.scope.push(Scope::Bold); 751 | } 752 | Tag::Strikethrough => { 753 | self.scope.push(Scope::Strikethrough); 754 | } 755 | Tag::Link { 756 | dest_url, title, .. 757 | } => { 758 | self.scope.push(Scope::Link { 759 | dest_url: dest_url.into_string(), 760 | title: title.into_string(), 761 | }); 762 | } 763 | Tag::Image { 764 | dest_url, title, .. 765 | } => { 766 | self.flush(); 767 | 768 | if !self.opts.no_images { 769 | let available_width = self 770 | .width 771 | .saturating_sub(self.prefix_len()) 772 | .saturating_sub(self.suffix_len()); 773 | match image::open(dest_url.as_ref()) { 774 | Ok(image) => { 775 | let (mut width, mut height) = image.dimensions(); 776 | if width > available_width as u32 { 777 | let scale = available_width as f64 / width as f64; 778 | width = (width as f64 * scale) as u32; 779 | height = (height as f64 * scale) as u32; 780 | } 781 | let mut vec = vec![]; 782 | termpix::print_image(image, true, width, height, &mut vec); 783 | let string = String::from_utf8(vec).unwrap(); 784 | 785 | for line in string.lines() { 786 | let (prefix, _) = self.prefix(); 787 | let (suffix, _) = self.suffix(); 788 | println!( 789 | "{}{}{}{}{}{}{}", 790 | self.centering, 791 | self.margin, 792 | prefix, 793 | line, 794 | suffix, 795 | self.margin, 796 | self.shadow(), 797 | ); 798 | } 799 | 800 | self.scope.push(Scope::Indent); 801 | self.scope.push(Scope::Caption); 802 | self.handle_text(title); 803 | } 804 | Err(error) => { 805 | self.handle_text("Cannot open image "); 806 | self.scope.push(Scope::Indent); 807 | self.scope.push(Scope::Link { 808 | dest_url: "".to_owned(), 809 | title: "".to_owned(), 810 | }); 811 | self.handle_text(dest_url); 812 | self.scope.pop(); 813 | self.handle_text(&format!(": {}", error)); 814 | self.scope.push(Scope::Caption); 815 | self.flush(); 816 | } 817 | } 818 | } else { 819 | self.scope.push(Scope::Indent); 820 | self.handle_text("[Image"); 821 | if !title.is_empty() { 822 | self.handle_text(": "); 823 | self.scope.push(Scope::Caption); 824 | self.handle_text(title); 825 | self.scope.pop(); 826 | } 827 | if !dest_url.is_empty() && !self.opts.hide_urls { 828 | self.handle_text(" <"); 829 | self.scope.push(Scope::Link { 830 | dest_url: "".to_owned(), 831 | title: "".to_owned(), 832 | }); 833 | self.handle_text(dest_url); 834 | self.scope.pop(); 835 | self.handle_text(">"); 836 | } 837 | self.handle_text("]"); 838 | self.scope.push(Scope::Caption); 839 | self.flush(); 840 | } 841 | } 842 | } 843 | } 844 | 845 | Event::End(tag) => match tag { 846 | TagEnd::Paragraph => { 847 | self.flush(); 848 | self.queue_empty(); 849 | } 850 | TagEnd::Heading(HeadingLevel::H1) => { 851 | self.flush(); 852 | self.scope.pop(); 853 | self.print_rule(); 854 | self.queue_empty(); 855 | } 856 | TagEnd::Heading(_) => { 857 | self.flush(); 858 | self.scope.pop(); 859 | self.queue_empty(); 860 | } 861 | TagEnd::List(..) => { 862 | self.flush(); 863 | self.scope.pop(); 864 | self.queue_empty(); 865 | } 866 | TagEnd::DefinitionList => { 867 | self.flush(); 868 | self.scope.pop(); 869 | self.queue_empty(); 870 | } 871 | TagEnd::DefinitionListTitle => { 872 | self.flush(); 873 | self.scope.pop(); 874 | } 875 | TagEnd::DefinitionListDefinition => { 876 | self.flush(); 877 | self.scope.pop(); 878 | self.queue_empty(); 879 | } 880 | TagEnd::Item => { 881 | self.flush(); 882 | self.scope.pop(); 883 | if let Some(Scope::List(index)) = self.scope.last_mut() { 884 | *index = index.map(|x| x + 1); 885 | } 886 | } 887 | TagEnd::BlockQuote(..) => { 888 | self.flush(); 889 | self.scope.pop(); 890 | self.queue_empty(); 891 | } 892 | TagEnd::Table => { 893 | self.print_table(); 894 | self.scope.pop(); 895 | self.queue_empty(); 896 | } 897 | TagEnd::HtmlBlock => {} 898 | TagEnd::CodeBlock => { 899 | self.flush_buffer(); 900 | self.scope.pop(); 901 | self.queue_empty(); 902 | } 903 | TagEnd::Link => { 904 | let Scope::Link { dest_url, title } = self.scope.pop().unwrap() else { 905 | panic!() 906 | }; 907 | if !title.is_empty() && !dest_url.is_empty() && !self.opts.hide_urls { 908 | self.handle_text(format!(" <{}: {}>", title, dest_url)); 909 | } else if !dest_url.is_empty() && !self.opts.hide_urls { 910 | self.handle_text(format!(" <{}>", dest_url)); 911 | } else if !title.is_empty() { 912 | self.handle_text(format!(" <{}>", title)); 913 | } 914 | } 915 | TagEnd::Image => { 916 | self.flush(); 917 | self.scope.pop(); 918 | self.scope.pop(); 919 | self.queue_empty(); 920 | } 921 | TagEnd::FootnoteDefinition => { 922 | self.flush(); 923 | self.scope.pop(); 924 | self.queue_empty(); 925 | } 926 | _ => { 927 | self.scope.pop(); 928 | } 929 | }, 930 | Event::Rule => { 931 | self.flush(); 932 | self.print_rule(); 933 | } 934 | Event::Text(text) => { 935 | self.handle_text(text); 936 | } 937 | Event::Code(text) => { 938 | self.scope.push(Scope::Code); 939 | self.handle_text(text); 940 | self.scope.pop(); 941 | } 942 | Event::Html(_text) => { /* not rendered */ } 943 | Event::InlineHtml(_text) => { /* not rendered */ } 944 | Event::InlineMath(text) | Event::DisplayMath(text) => { 945 | self.scope.push(Scope::Code); 946 | self.handle_text(text); 947 | self.scope.pop(); 948 | } 949 | Event::FootnoteReference(text) => { 950 | self.scope.push(Scope::FootnoteReference); 951 | self.handle_text(&format!("[{}]", text)); 952 | self.scope.pop(); 953 | } 954 | Event::SoftBreak => { 955 | self.handle_text(" "); 956 | } 957 | Event::HardBreak => { 958 | self.flush(); 959 | } 960 | Event::TaskListMarker(checked) => { 961 | self.handle_text(if checked { "[✓] " } else { "[ ] " }); 962 | } 963 | } 964 | } 965 | } 966 | -------------------------------------------------------------------------------- /src/str_width.rs: -------------------------------------------------------------------------------- 1 | use console::strip_ansi_codes; 2 | use unicode_width::UnicodeWidthChar; 3 | 4 | pub fn str_width(s: &str) -> usize { 5 | strip_ansi_codes(s) 6 | .chars() 7 | .flat_map(|ch| { 8 | if cjk::is_cjk_codepoint(ch) { 9 | UnicodeWidthChar::width_cjk(ch) 10 | } else { 11 | UnicodeWidthChar::width(ch) 12 | } 13 | }) 14 | .sum() 15 | } 16 | -------------------------------------------------------------------------------- /src/table.rs: -------------------------------------------------------------------------------- 1 | use crate::str_width; 2 | use crate::words::Words; 3 | use ansi_term::Style; 4 | use console::strip_ansi_codes; 5 | use pulldown_cmark::Alignment; 6 | use std::io::Write; 7 | 8 | pub struct Table { 9 | titles: Vec, 10 | rows: Vec>, 11 | width: usize, 12 | } 13 | 14 | impl Table { 15 | pub fn new(titles: Vec, rows: Vec>, width: usize) -> Self { 16 | Table { 17 | titles, 18 | rows, 19 | width, 20 | } 21 | } 22 | 23 | pub fn print(self, paper_style: Style, alignment: &[Alignment]) -> String { 24 | let Table { 25 | titles, 26 | rows, 27 | width, 28 | } = self; 29 | 30 | // NOTE: for now, styling is not supported within tables because that gets really hard 31 | let titles = titles 32 | .iter() 33 | .map(|title| strip_ansi_codes(title).trim().to_string()) 34 | .collect::>(); 35 | let rows = rows 36 | .iter() 37 | .map(|row| { 38 | row.iter() 39 | .map(|cell| strip_ansi_codes(cell).trim().to_string()) 40 | .collect() 41 | }) 42 | .collect::>>(); 43 | 44 | let num_cols = usize::max( 45 | titles.len(), 46 | rows.iter().map(|row| row.len()).max().unwrap_or(0), 47 | ); 48 | 49 | let mut title_longest_words = titles 50 | .iter() 51 | .map(|title| { 52 | Words::new(title) 53 | .map(|word| str_width(word.trim())) 54 | .max() 55 | .unwrap_or(0) 56 | }) 57 | .collect::>(); 58 | title_longest_words.resize(num_cols, 0); 59 | let longest_words = rows 60 | .iter() 61 | .map(|row| { 62 | row.iter() 63 | .map(|cell| { 64 | Words::new(cell) 65 | .map(|word| str_width(word.trim())) 66 | .max() 67 | .unwrap_or(0) 68 | }) 69 | .collect::>() 70 | }) 71 | .fold(title_longest_words, |mut chars, row| { 72 | for i in 0..row.len() { 73 | chars[i] = usize::max(chars[i], row[i]); 74 | } 75 | chars 76 | }); 77 | 78 | let mut title_chars = titles 79 | .iter() 80 | .map(|title| title.lines().map(str_width).max().unwrap_or(0)) 81 | .collect::>(); 82 | title_chars.resize(num_cols, 0); 83 | let max_chars_per_col = rows 84 | .iter() 85 | .map(|row| { 86 | row.iter() 87 | .map(|cell| cell.lines().map(str_width).max().unwrap_or(0)) 88 | .collect::>() 89 | }) 90 | .fold(title_chars.clone(), |mut chars, row| { 91 | for i in 0..row.len() { 92 | chars[i] = usize::max(1, usize::max(chars[i], row[i])); 93 | } 94 | chars 95 | }); 96 | 97 | let total_chars: usize = max_chars_per_col.iter().sum(); 98 | let max_chars_width = width.saturating_sub(4 + (num_cols - 1) * 3); 99 | let col_widths = if total_chars < max_chars_width { 100 | max_chars_per_col 101 | } else { 102 | max_chars_per_col 103 | .into_iter() 104 | .enumerate() 105 | .map(|(i, chars)| { 106 | usize::max( 107 | longest_words[i], 108 | (max_chars_width as f64 * chars as f64 / total_chars as f64) as usize, 109 | ) 110 | }) 111 | .collect() 112 | }; 113 | if col_widths.iter().sum::() > max_chars_width { 114 | return format!("{}", paper_style.paint("[Table too large to fit]")); 115 | } 116 | 117 | let mut buffer = vec![]; 118 | print_separator(&mut buffer, &col_widths, '─', '┌', '┬', '┐', paper_style); 119 | if !titles.is_empty() { 120 | print_row(&mut buffer, &col_widths, alignment, &titles, paper_style); 121 | print_separator(&mut buffer, &col_widths, '═', '╞', '╪', '╡', paper_style); 122 | } 123 | let row_count = rows.len(); 124 | for (i, row) in rows.into_iter().enumerate() { 125 | print_row(&mut buffer, &col_widths, alignment, &row, paper_style); 126 | if i != row_count - 1 { 127 | print_separator(&mut buffer, &col_widths, '─', '├', '┼', '┤', paper_style); 128 | } 129 | } 130 | print_separator(&mut buffer, &col_widths, '─', '└', '┴', '┘', paper_style); 131 | 132 | String::from_utf8(buffer).unwrap() 133 | } 134 | } 135 | 136 | fn print_row( 137 | w: &mut W, 138 | cols: &[usize], 139 | alignment: &[Alignment], 140 | row: &[String], 141 | paper_style: Style, 142 | ) { 143 | let mut row_words = row.into_iter().map(|s| Words::new(s)).collect::>(); 144 | loop { 145 | let mut done = true; 146 | write!(w, "{}", paper_style.paint("│")).unwrap(); 147 | for (i, words) in row_words.iter_mut().enumerate() { 148 | let mut line = match words.next() { 149 | Some(line) => line.trim().to_string(), 150 | None => { 151 | write!( 152 | w, 153 | "{}", 154 | paper_style.paint(format!(" {: { 163 | if str_width(&line) + str_width(&next) <= cols[i] { 164 | line += &next; 165 | } else { 166 | words.undo(); 167 | done = false; 168 | break; 169 | } 170 | } 171 | None => break, 172 | }; 173 | } 174 | line = line.trim().to_string(); 175 | let padded = if alignment[i] == Alignment::Center { 176 | format!( 177 | " {: ^width$} │", 178 | line, 179 | width = cols[i] - (line.len().saturating_sub(str_width(&line))) 180 | ) 181 | } else if alignment[i] == Alignment::Right { 182 | format!( 183 | " {: >width$} │", 184 | line, 185 | width = cols[i] - (line.len().saturating_sub(str_width(&line))) 186 | ) 187 | } else { 188 | format!( 189 | " {: ( 204 | w: &mut W, 205 | cols: &[usize], 206 | mid: char, 207 | left: char, 208 | cross: char, 209 | right: char, 210 | paper_style: Style, 211 | ) { 212 | let line = cols 213 | .iter() 214 | .map(|width| mid.to_string().repeat(*width)) 215 | .collect::>() 216 | .join(&format!("{}{}{}", mid, cross, mid)); 217 | write!( 218 | w, 219 | "{}\n", 220 | paper_style.paint(format!("{}{}{}{}{}", left, mid, line, mid, right)) 221 | ) 222 | .unwrap(); 223 | } 224 | -------------------------------------------------------------------------------- /src/termpix.rs: -------------------------------------------------------------------------------- 1 | //! This module is being used temporarily until someone publishes termpix to crates.io 2 | use ansi_term::ANSIStrings; 3 | use ansi_term::Colour::Fixed; 4 | use image::{ 5 | Pixel, 6 | imageops::{self, FilterType}, 7 | }; 8 | use std::io::Write; 9 | 10 | pub fn print_image( 11 | img: image::DynamicImage, 12 | true_colour: bool, 13 | width: u32, 14 | height: u32, 15 | w: &mut W, 16 | ) { 17 | let img = imageops::resize(&img, width, height, FilterType::Nearest); 18 | 19 | if !true_colour { 20 | for y in 0..height { 21 | //TODO: inc by 2 instead 22 | if y % 2 == 1 || y + 1 == height { 23 | continue; 24 | } 25 | 26 | let row: Vec<_> = (0..width) 27 | .map(|x| { 28 | let mut top = img[(x, y)]; 29 | let mut bottom = img[(x, y + 1)]; 30 | blend_alpha(&mut top); 31 | blend_alpha(&mut bottom); 32 | let top_colour = find_colour_index(top.to_rgb().channels()); 33 | let bottom_colour = find_colour_index(bottom.to_rgb().channels()); 34 | Fixed(bottom_colour).on(Fixed(top_colour)).paint("▄") 35 | }) 36 | .collect(); 37 | 38 | write!(w, "{}\n", ANSIStrings(&row)).ok(); 39 | } 40 | } else { 41 | let mut row = Vec::new(); 42 | for y in 0..height { 43 | //TODO: inc by 2 instead 44 | if y % 2 == 1 || y + 1 == height { 45 | continue; 46 | } 47 | 48 | for x in 0..width { 49 | let mut top = img[(x, y)]; 50 | let mut bottom = img[(x, y + 1)]; 51 | blend_alpha(&mut top); 52 | blend_alpha(&mut bottom); 53 | write!( 54 | row, 55 | "\x1b[48;2;{};{};{}m\x1b[38;2;{};{};{}m▄", 56 | top[0], top[1], top[2], bottom[0], bottom[1], bottom[2] 57 | ) 58 | .unwrap(); 59 | } 60 | 61 | write!(row, "\x1b[m\n").unwrap(); 62 | w.write(&row).unwrap(); 63 | row.clear(); 64 | } 65 | } 66 | } 67 | 68 | fn find_colour_index(pixel: &[u8]) -> u8 { 69 | let mut best = 0; 70 | let mut best_distance = 255 * 255 * 3 + 1; 71 | for i in 16..255 { 72 | let ansi_colour = ANSI_COLOURS[i]; 73 | let dr = ansi_colour[0] - pixel[0] as i32; 74 | let dg = ansi_colour[1] - pixel[1] as i32; 75 | let db = ansi_colour[2] - pixel[2] as i32; 76 | let distance = dr * dr + dg * dg + db * db; 77 | 78 | if distance < best_distance { 79 | best_distance = distance; 80 | best = i as u8; 81 | } 82 | } 83 | 84 | return best; 85 | } 86 | 87 | fn blend_alpha(pixel: &mut image::Rgba) { 88 | let alpha = pixel[3] as i32 as f32 / 255.0; 89 | pixel[0] = (alpha * (pixel[0] as i32 as f32) + (1.0 - alpha) * 38.0) as u8; 90 | pixel[1] = (alpha * (pixel[1] as i32 as f32) + (1.0 - alpha) * 38.0) as u8; 91 | pixel[2] = (alpha * (pixel[2] as i32 as f32) + (1.0 - alpha) * 38.0) as u8; 92 | } 93 | 94 | #[rustfmt::skip] 95 | static ANSI_COLOURS: [[i32; 3]; 256] = [ 96 | [ 0x00, 0x00, 0x00 ],[ 0x80, 0x00, 0x00 ],[ 0x00, 0x80, 0x00 ],[ 0x80, 0x80, 0x00 ],[ 0x00, 0x00, 0x80 ], 97 | [ 0x80, 0x00, 0x80 ],[ 0x00, 0x80, 0x80 ],[ 0xc0, 0xc0, 0xc0 ],[ 0x80, 0x80, 0x80 ],[ 0xff, 0x00, 0x00 ], 98 | [ 0x00, 0xff, 0x00 ],[ 0xff, 0xff, 0x00 ],[ 0x00, 0x00, 0xff ],[ 0xff, 0x00, 0xff ],[ 0x00, 0xff, 0xff ], 99 | [ 0xff, 0xff, 0xff ],[ 0x00, 0x00, 0x00 ],[ 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0x87, 0xaf, 0x00 ],[ 0x87, 0xaf, 0x5f ],[ 0x87, 0xaf, 0x87 ],[ 0x87, 0xaf, 0xaf ], 118 | [ 0x87, 0xaf, 0xd7 ],[ 0x87, 0xaf, 0xff ],[ 0x87, 0xd7, 0x00 ],[ 0x87, 0xd7, 0x5f ],[ 0x87, 0xd7, 0x87 ], 119 | [ 0x87, 0xd7, 0xaf ],[ 0x87, 0xd7, 0xd7 ],[ 0x87, 0xd7, 0xff ],[ 0x87, 0xff, 0x00 ],[ 0x87, 0xff, 0x5f ], 120 | [ 0x87, 0xff, 0x87 ],[ 0x87, 0xff, 0xaf ],[ 0x87, 0xff, 0xd7 ],[ 0x87, 0xff, 0xff ],[ 0xaf, 0x00, 0x00 ], 121 | [ 0xaf, 0x00, 0x5f ],[ 0xaf, 0x00, 0x87 ],[ 0xaf, 0x00, 0xaf ],[ 0xaf, 0x00, 0xd7 ],[ 0xaf, 0x00, 0xff ], 122 | [ 0xaf, 0x5f, 0x00 ],[ 0xaf, 0x5f, 0x5f ],[ 0xaf, 0x5f, 0x87 ],[ 0xaf, 0x5f, 0xaf ],[ 0xaf, 0x5f, 0xd7 ], 123 | [ 0xaf, 0x5f, 0xff ],[ 0xaf, 0x87, 0x00 ],[ 0xaf, 0x87, 0x5f ],[ 0xaf, 0x87, 0x87 ],[ 0xaf, 0x87, 0xaf ], 124 | [ 0xaf, 0x87, 0xd7 ],[ 0xaf, 0x87, 0xff ],[ 0xaf, 0xaf, 0x00 ],[ 0xaf, 0xaf, 0x5f ],[ 0xaf, 0xaf, 0x87 ], 125 | [ 0xaf, 0xaf, 0xaf ],[ 0xaf, 0xaf, 0xd7 ],[ 0xaf, 0xaf, 0xff ],[ 0xaf, 0xd7, 0x00 ],[ 0xaf, 0xd7, 0x5f ], 126 | [ 0xaf, 0xd7, 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0xd7, 0xff, 0xff ],[ 0xff, 0x00, 0x00 ],[ 0xff, 0x00, 0x5f ],[ 0xff, 0x00, 0x87 ],[ 0xff, 0x00, 0xaf ], 136 | [ 0xff, 0x00, 0xd7 ],[ 0xff, 0x00, 0xff ],[ 0xff, 0x5f, 0x00 ],[ 0xff, 0x5f, 0x5f ],[ 0xff, 0x5f, 0x87 ], 137 | [ 0xff, 0x5f, 0xaf ],[ 0xff, 0x5f, 0xd7 ],[ 0xff, 0x5f, 0xff ],[ 0xff, 0x87, 0x00 ],[ 0xff, 0x87, 0x5f ], 138 | [ 0xff, 0x87, 0x87 ],[ 0xff, 0x87, 0xaf ],[ 0xff, 0x87, 0xd7 ],[ 0xff, 0x87, 0xff ],[ 0xff, 0xaf, 0x00 ], 139 | [ 0xff, 0xaf, 0x5f ],[ 0xff, 0xaf, 0x87 ],[ 0xff, 0xaf, 0xaf ],[ 0xff, 0xaf, 0xd7 ],[ 0xff, 0xaf, 0xff ], 140 | [ 0xff, 0xd7, 0x00 ],[ 0xff, 0xd7, 0x5f ],[ 0xff, 0xd7, 0x87 ],[ 0xff, 0xd7, 0xaf ],[ 0xff, 0xd7, 0xd7 ], 141 | [ 0xff, 0xd7, 0xff ],[ 0xff, 0xff, 0x00 ],[ 0xff, 0xff, 0x5f ],[ 0xff, 0xff, 0x87 ],[ 0xff, 0xff, 0xaf ], 142 | [ 0xff, 0xff, 0xd7 ],[ 0xff, 0xff, 0xff ],[ 0x08, 0x08, 0x08 ],[ 0x12, 0x12, 0x12 ],[ 0x1c, 0x1c, 0x1c ], 143 | [ 0x26, 0x26, 0x26 ],[ 0x30, 0x30, 0x30 ],[ 0x3a, 0x3a, 0x3a ],[ 0x44, 0x44, 0x44 ],[ 0x4e, 0x4e, 0x4e ], 144 | [ 0x58, 0x58, 0x58 ],[ 0x60, 0x60, 0x60 ],[ 0x66, 0x66, 0x66 ],[ 0x76, 0x76, 0x76 ],[ 0x80, 0x80, 0x80 ], 145 | [ 0x8a, 0x8a, 0x8a ],[ 0x94, 0x94, 0x94 ],[ 0x9e, 0x9e, 0x9e ],[ 0xa8, 0xa8, 0xa8 ],[ 0xb2, 0xb2, 0xb2 ], 146 | [ 0xbc, 0xbc, 0xbc ],[ 0xc6, 0xc6, 0xc6 ],[ 0xd0, 0xd0, 0xd0 ],[ 0xda, 0xda, 0xda ],[ 0xe4, 0xe4, 0xe4 ], 147 | [ 0xee, 0xee, 0xee ]]; 148 | -------------------------------------------------------------------------------- /src/words.rs: -------------------------------------------------------------------------------- 1 | use cjk::is_cjk_codepoint; 2 | 3 | pub struct Words> { 4 | source: S, 5 | position: usize, 6 | previous: usize, 7 | preserve_whitespace: bool, 8 | } 9 | 10 | impl> Words { 11 | pub fn new(source: S) -> Self { 12 | Self { 13 | source, 14 | previous: 0, 15 | position: 0, 16 | preserve_whitespace: false, 17 | } 18 | } 19 | 20 | pub fn preserving_whitespace(source: S) -> Self { 21 | Self { 22 | source, 23 | previous: 0, 24 | position: 0, 25 | preserve_whitespace: true, 26 | } 27 | } 28 | } 29 | 30 | impl> Words { 31 | pub fn undo(&mut self) { 32 | self.position = self.previous; 33 | } 34 | } 35 | 36 | // NOTE: this almost certainly does some extra processing... but for my sanity, 37 | // we accept that 38 | fn may_end_word_cjk(ch: char) -> bool { 39 | // simplified chinese 40 | !"$(£¥·'\"〈《「『【〔〖〝﹙﹛＄（．［｛￡￥" 41 | .chars() 42 | .any(|c| c == ch) 43 | // traditional chinese 44 | && !"([{£¥'\"‵〈《「『〔〝︴﹙﹛（｛︵︷︹︻︽︿﹁﹃﹏" 45 | .chars() 46 | .any(|c| c == ch) 47 | // japanese 48 | && !"([｛〔〈《「『【〘〖〝'\"｟«" 49 | .chars() 50 | .any(|c| c == ch) 51 | // japanese inseparable 52 | && !"—...‥〳〴〵" 53 | .chars() 54 | .any(|c| c == ch) 55 | // korean 56 | && !"$([\\{£¥'\"々〇〉》」〔＄（［｛｠￥￦ #" 57 | .chars() 58 | .any(|c| c == ch) 59 | } 60 | 61 | fn may_start_word_cjk(ch: char) -> bool { 62 | // simplified chinese 63 | !"!%),.:;?]}¢°·'\"†‡›℃∶、。〃〆〕〗〞﹚﹜！＂％＇），．：；？！］｝～" 64 | .chars() 65 | .any(|c| c == ch) 66 | // traditional chinese 67 | && !"!),.:;?]}¢·–— '\"• 、。〆〞〕〉》」︰︱︲︳﹐﹑﹒﹓﹔﹕﹖﹘﹚﹜！），．：；？︶︸︺︼︾﹀﹂﹗］｜｝､" 68 | .chars() 69 | .any(|c| c == ch) 70 | // japenese 71 | && !")]｝〕〉》」』】〙〗〟'\"｠»" 72 | .chars() 73 | .any(|c| c == ch) 74 | && !"ヽヾーァィゥェォッャュョヮヵヶぁぃぅぇぉっゃゅょゎゕゖㇰㇱㇲㇳㇴㇵㇶㇷㇸㇹㇺㇻㇼㇽㇾㇿ々〻" 75 | .chars() 76 | .any(|c| c == ch) 77 | && !"‐゠–〜? ! ‼ ⁇ ⁈ ⁉・、:;,。." 78 | .chars() 79 | .any(|c| c == ch) 80 | // japanese inseparable 81 | && !"—...‥〳〴〵" 82 | .chars() 83 | .any(|c| c == ch) 84 | // korean 85 | && !"!%),.:;?]}¢°'\"†‡℃〆〈《「『〕！％），．：；？］｝" 86 | .chars() 87 | .any(|c| c == ch) 88 | } 89 | 90 | impl> Iterator for Words { 91 | type Item = String; 92 | 93 | fn next(&mut self) -> Option { 94 | self.previous = self.position; 95 | let chars: Vec = self.source.as_ref().chars().skip(self.position).collect(); 96 | let mut start = 0; 97 | while start < chars.len() && chars[start].is_whitespace() { 98 | start += 1; 99 | } 100 | self.position += start; 101 | if start == chars.len() { 102 | if chars.len() == 0 { 103 | return None; 104 | } else if self.preserve_whitespace { 105 | return Some(chars[..].into_iter().collect()); 106 | } else { 107 | return Some(" ".to_string()); 108 | } 109 | } 110 | let mut len = 0; 111 | while start + len < chars.len() { 112 | if chars[start + len] == '-' { 113 | len += 1; 114 | break; 115 | } 116 | if chars[start + len].is_whitespace() { 117 | break; 118 | } 119 | if len != 0 120 | // Before or after cjk characters, we can usually break line, unless it's one of the exceptions. 121 | // I got the exceptions off Wikipedia: 122 | // https://en.wikipedia.org/wiki/Line_breaking_rules_in_East_Asian_languages 123 | && (is_cjk_codepoint(chars[start + len - 1]) || is_cjk_codepoint(chars[start + len])) 124 | && may_end_word_cjk(chars[start + len - 1]) 125 | && may_start_word_cjk(chars[start + len]) 126 | { 127 | break; 128 | } 129 | len += 1; 130 | } 131 | self.position += len; 132 | if chars[0].is_whitespace() { 133 | if self.preserve_whitespace { 134 | return Some(chars[0..start + len].into_iter().collect::()); 135 | } else { 136 | return Some( 137 | String::from(" ") + &chars[start..start + len].into_iter().collect::(), 138 | ); 139 | } 140 | } else { 141 | return Some(chars[start..start + len].into_iter().collect::()); 142 | } 143 | } 144 | } 145 | --------------------------------------------------------------------------------