| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/unicode-bidi-0.3.13/src/char_data/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../unicode_bidi/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../unicode_bidi/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// Copyright 2015 The Servo Project Developers. See the |
| // COPYRIGHT file at the top-level directory of this distribution. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="doccomment">//! Accessor for `Bidi_Class` property from Unicode Character Database (UCD) |
| |
| </span><span class="kw">mod </span>tables; |
| |
| <span class="kw">pub use </span><span class="self">self</span>::tables::{BidiClass, UNICODE_VERSION}; |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">use </span>core::char; |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">use </span>core::cmp::Ordering::{Equal, Greater, Less}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">use </span><span class="self">self</span>::tables::bidi_class_table; |
| <span class="kw">use </span><span class="kw">crate</span>::data_source::BidiMatchedOpeningBracket; |
| <span class="kw">use </span><span class="kw">crate</span>::BidiClass::<span class="kw-2">*</span>; |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::BidiDataSource; |
| <span class="doccomment">/// Hardcoded Bidi data that ships with the unicode-bidi crate. |
| /// |
| /// This can be enabled with the default `hardcoded-data` Cargo feature. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">pub struct </span>HardcodedBidiData; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">impl </span>BidiDataSource <span class="kw">for </span>HardcodedBidiData { |
| <span class="kw">fn </span>bidi_class(<span class="kw-2">&</span><span class="self">self</span>, c: char) -> BidiClass { |
| bsearch_range_value_table(c, bidi_class_table) |
| } |
| } |
| |
| <span class="doccomment">/// Find the `BidiClass` of a single char. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">pub fn </span>bidi_class(c: char) -> BidiClass { |
| bsearch_range_value_table(c, bidi_class_table) |
| } |
| |
| <span class="doccomment">/// If this character is a bracket according to BidiBrackets.txt, |
| /// return the corresponding *normalized* *opening bracket* of the pair, |
| /// and whether or not it itself is an opening bracket. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>bidi_matched_opening_bracket(c: char) -> <span class="prelude-ty">Option</span><BidiMatchedOpeningBracket> { |
| <span class="kw">for </span>pair <span class="kw">in </span><span class="self">self</span>::tables::bidi_pairs_table { |
| <span class="kw">if </span>pair.<span class="number">0 </span>== c || pair.<span class="number">1 </span>== c { |
| <span class="kw">let </span>skeleton = pair.<span class="number">2</span>.unwrap_or(pair.<span class="number">0</span>); |
| <span class="kw">return </span><span class="prelude-val">Some</span>(BidiMatchedOpeningBracket { |
| opening: skeleton, |
| is_open: pair.<span class="number">0 </span>== c, |
| }); |
| } |
| } |
| <span class="prelude-val">None |
| </span>} |
| |
| <span class="kw">pub fn </span>is_rtl(bidi_class: BidiClass) -> bool { |
| <span class="kw">match </span>bidi_class { |
| RLE | RLO | RLI => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"hardcoded-data"</span>)] |
| </span><span class="kw">fn </span>bsearch_range_value_table(c: char, r: <span class="kw-2">&</span><span class="lifetime">'static </span>[(char, char, BidiClass)]) -> BidiClass { |
| <span class="kw">match </span>r.binary_search_by(|<span class="kw-2">&</span>(lo, hi, <span class="kw">_</span>)| { |
| <span class="kw">if </span>lo <= c && c <= hi { |
| Equal |
| } <span class="kw">else if </span>hi < c { |
| Less |
| } <span class="kw">else </span>{ |
| Greater |
| } |
| }) { |
| <span class="prelude-val">Ok</span>(idx) => { |
| <span class="kw">let </span>(<span class="kw">_</span>, <span class="kw">_</span>, cat) = r[idx]; |
| cat |
| } |
| <span class="comment">// UCD/extracted/DerivedBidiClass.txt: "All code points not explicitly listed |
| // for Bidi_Class have the value Left_To_Right (L)." |
| </span><span class="prelude-val">Err</span>(<span class="kw">_</span>) => L, |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(test, feature = <span class="string">"hardcoded-data"</span>))] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_ascii() { |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0000}'</span>), BN); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0040}'</span>), ON); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0041}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0062}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{007F}'</span>), BN); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_bmp() { |
| <span class="comment">// Hebrew |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0590}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{05D0}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{05D1}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{05FF}'</span>), R); |
| |
| <span class="comment">// Arabic |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0600}'</span>), AN); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0627}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{07BF}'</span>), AL); |
| |
| <span class="comment">// Default R + Arabic Extras |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{07C0}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{085F}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0860}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{0870}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{089F}'</span>), NSM); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{08A0}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{089F}'</span>), NSM); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{08FF}'</span>), NSM); |
| |
| <span class="comment">// Default ET |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{20A0}'</span>), ET); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{20CF}'</span>), ET); |
| |
| <span class="comment">// Arabic Presentation Forms |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FB1D}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FB4F}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FB50}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDCF}'</span>), ON); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDF0}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDFF}'</span>), ON); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FE70}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FEFE}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FEFF}'</span>), BN); |
| |
| <span class="comment">// noncharacters |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDD0}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDD1}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDEE}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FDEF}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FFFE}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{FFFF}'</span>), L); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_smp() { |
| <span class="comment">// Default AL + R |
| </span><span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{10800}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{10FFF}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1E800}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1EDFF}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1EE00}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1EEFF}'</span>), AL); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1EF00}'</span>), R); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{1EFFF}'</span>), R); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_unassigned_planes() { |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{30000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{40000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{50000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{60000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{70000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{80000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{90000}'</span>), L); |
| <span class="macro">assert_eq!</span>(bidi_class(<span class="string">'\u{a0000}'</span>), L); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="unicode_bidi" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |