Use crossterm instead of termion

With this patch, we replace the termion dependency with crossterm. This should make it possible to compile and run rusty-man on other platforms than Unix.
4 years ago · 41dd007390
parent 0d75176f59
commit 41dd007390
6 changed files with 180 additions and 77 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -20,6 +20,11 @@ name = "anyhow"
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@ -58,6 +63,37 @@ dependencies = [
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@ -220,6 +256,14 @@ name = "libc"
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@ -273,6 +317,28 @@ dependencies = [
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@ -284,9 +350,12 @@ version = "0.1.14"
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@ -302,6 +371,28 @@ dependencies = [
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@ -457,14 +548,6 @@ name = "redox_syscall"
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 "checksum string_cache_codegen 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f24c8e5e19d22a726626f1a5e16fe15b132dcf21d10177fa5a45ce7962996b97"
@ -838,7 +957,6 @@ dependencies = [
 "checksum syn 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)" = "936cae2873c940d92e697597c5eee105fb570cd5689c695806f672883653349b"
 "checksum syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 "checksum tendril 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "707feda9f2582d5d680d733e38755547a3e8fb471e7ba11452ecfd9ce93a5d3b"
-"checksum termion 1.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "c22cec9d8978d906be5ac94bceb5a010d885c626c4c8855721a4dbd20e3ac905"
 "checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum thin-slice 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8eaa81235c7058867fa8c0e7314f33dcce9c215f535d1913822a2b3f5e289f3c"
 "checksum time 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -14,6 +14,7 @@ license = "MIT"

 [dependencies]
 anyhow = "1.0.31"
+crossterm = "0.17.7"
 html2text = "0.1.12"
 kuchiki = "0.8.0"
 markup5ever = "0.10.0"
@ -21,7 +22,6 @@ pager = "0.15.0"
 serde_json = "1.0.56"
 serde_repr = "0.1.6"
 serde_tuple = "0.5.0"
-termion = "1.5.5"

 [dependencies.serde]
 version = "1.0.114"
--- a/README.md
+++ b/README.md
@ -57,8 +57,8 @@ For more usage information, run `rusty-man --help`.
 To install rusty-man, clone this repository and use cargo to build the project.
 See the [`INSTALL.md`](./INSTALL.md) file for more information.

-rusty-man should run on all platforms supported by [`termion`][].  If you have
-trouble running rusty-man on your platform or if you want to help porting
+rusty-man should run on all platforms supported by [`crossterm`][].  If you
+have trouble running rusty-man on your platform or if you want to help porting
 rusty-man to other platforms, please let me know.

 ## Contributing
@ -87,7 +87,7 @@ This project is licensed under the [MIT License][].

 `rusty-man` complies with [version 3.0 of the REUSE specification][reuse].

-[`termion`]: https://lib.rs/termion
+[`crossterm`]: https://lib.rs/crossterm
 [`CONTRIBUTING.md`]: ./CONTRIBUTING.md
 [issues]: https://todo.sr.ht/~ireas/rusty-man?search=label:%22good%20first%20issue%22%20status%3Aopen
 [~ireas/rusty-man-dev@lists.sr.ht]: mailto:~ireas/rusty-man-dev@lists.sr.ht
--- a/src/main.rs
+++ b/src/main.rs
@ -204,14 +204,11 @@ fn select_item(
    items: &[index::IndexItem],
    name: &doc::Name,
 ) -> anyhow::Result<Option<index::IndexItem>> {
+    use crossterm::tty::IsTty;
    use std::io::Write;

    // If we are not on a TTY, we can’t ask the user to select an item --> abort
-    anyhow::ensure!(
-        termion::is_tty(&io::stdin()),
-        "Found multiple matches for {}",
-        name
-    );
+    anyhow::ensure!(io::stdin().is_tty(), "Found multiple matches for {}", name);

    println!("Found mulitple matches for {} – select one of:", name);
    println!();
--- a/src/viewer/mod.rs
+++ b/src/viewer/mod.rs
@ -23,7 +23,9 @@ pub fn get_viewer(s: &str) -> anyhow::Result<Box<dyn Viewer>> {
 }

 pub fn get_default() -> Box<dyn Viewer> {
-    if termion::is_tty(&io::stdout()) {
+    use crossterm::tty::IsTty;
+
+    if io::stdout().is_tty() {
        Box::new(text::TextViewer::with_rich_text())
    } else {
        Box::new(text::TextViewer::with_plain_text())
@ -31,7 +33,7 @@ pub fn get_default() -> Box<dyn Viewer> {
 }

 pub fn get_line_length() -> usize {
-    if let Ok((cols, _)) = termion::terminal_size() {
+    if let Ok((cols, _)) = crossterm::terminal::size() {
        cmp::min(cols.into(), 100)
    } else {
        100
--- a/src/viewer/text/rich.rs
+++ b/src/viewer/text/rich.rs
@ -22,17 +22,16 @@ impl RichTextRenderer {
    }

    fn render_string(&self, ts: &RichString) -> io::Result<()> {
-        let start_style = get_style(ts, get_start_style);
-        let end_style = get_style(ts, get_end_style);
-        write!(io::stdout(), "{}{}{}", start_style, ts.s, end_style)
+        let content = get_styled_content(ts);
+        write!(io::stdout(), "{}", content)
    }
 }

 impl super::Printer for RichTextRenderer {
    fn print_title(&self, left: &str, middle: &str, right: &str) -> io::Result<()> {
-        write!(io::stdout(), "{}", termion::style::Bold)?;
+        write!(io::stdout(), "{}", crossterm::style::Attribute::Bold)?;
        super::print_title(self.line_length, left, middle, right)?;
-        writeln!(io::stdout(), "{}", termion::style::Reset)
+        writeln!(io::stdout(), "{}", crossterm::style::Attribute::Reset)
    }

    fn print_html(&self, indent: usize, s: &str, _show_links: bool) -> io::Result<()> {
@ -55,10 +54,11 @@ impl super::Printer for RichTextRenderer {
    }

    fn print_heading(&self, indent: usize, level: usize, s: &str) -> io::Result<()> {
-        let text = match level {
-            1..=3 => format!("{}{}{}", termion::style::Bold, s, termion::style::Reset),
-            _ => s.to_owned(),
-        };
+        let mut text = crossterm::style::style(s);
+        if level < 4 {
+            use crossterm::style::Attribute;
+            text = text.attribute(Attribute::Bold).attribute(Attribute::Reset);
+        }
        writeln!(io::stdout(), "{}{}", " ".repeat(indent), &text)
    }

@ -67,40 +67,26 @@ impl super::Printer for RichTextRenderer {
    }
 }

-fn get_style<F>(ts: &RichString, f: F) -> String
-where
-    F: Fn(&text_renderer::RichAnnotation) -> String,
-{
-    ts.tag.iter().map(f).collect::<Vec<_>>().join("")
-}
-
-fn get_start_style(annotation: &text_renderer::RichAnnotation) -> String {
-    use termion::{color, style};
+fn get_styled_content(ts: &RichString) -> crossterm::style::StyledContent<&str> {
+    use crossterm::style::{Attribute, Color};
    use text_renderer::RichAnnotation;

-    match annotation {
-        RichAnnotation::Default => String::new(),
-        RichAnnotation::Link(_) => style::Underline.to_string(),
-        RichAnnotation::Image => String::new(),
-        RichAnnotation::Emphasis => style::Italic.to_string(),
-        RichAnnotation::Strong => style::Bold.to_string(),
-        RichAnnotation::Code => color::Fg(color::LightYellow).to_string(),
-        RichAnnotation::Preformat(_) => String::new(),
+    let mut content = crossterm::style::style(ts.s.as_ref());
+
+    for annotation in &ts.tag {
+        content = match annotation {
+            RichAnnotation::Default => content,
+            RichAnnotation::Link(_) => content.attribute(Attribute::Underlined),
+            RichAnnotation::Image => content,
+            RichAnnotation::Emphasis => content.attribute(Attribute::Italic),
+            // TODO: investigeate why NoBold does not work
+            RichAnnotation::Strong => content
+                .attribute(Attribute::Bold)
+                .attribute(Attribute::Reset),
+            RichAnnotation::Code => content.with(Color::Yellow),
+            RichAnnotation::Preformat(_) => content,
+        };
    }
-}
-
-fn get_end_style(annotation: &text_renderer::RichAnnotation) -> String {
-    use termion::{color, style};
-    use text_renderer::RichAnnotation;

-    match annotation {
-        RichAnnotation::Default => String::new(),
-        RichAnnotation::Link(_) => style::NoUnderline.to_string(),
-        RichAnnotation::Image => String::new(),
-        RichAnnotation::Emphasis => style::NoItalic.to_string(),
-        // TODO: investigate why NoBold does not work
-        RichAnnotation::Strong => style::Reset.to_string(),
-        RichAnnotation::Code => color::Fg(color::Reset).to_string(),
-        RichAnnotation::Preformat(_) => String::new(),
-    }
+    content
 }