unicode-bidi

本crate实现了用于显示混合从右到左和从左到右文本的Unicode双向算法。它使用安全的Rust编写，与当前稳定版本兼容。

文档

lib.rs:

本crate实现了用于显示混合从右到左和从左到右文本的Unicode双向算法。它使用安全的Rust编写，与当前稳定版本兼容。

示例

use unicode_bidi::BidiInfo;

// This example text is defined using `concat!` because some browsers
// and text editors have trouble displaying bidi strings.
let text = concat![
  "א",
  "ב",
  "ג",
  "a",
  "b",
  "c",
];

// Resolve embedding levels within the text.  Pass `None` to detect the
// paragraph level automatically.
let bidi_info = BidiInfo::new(&text, None);

// This paragraph has embedding level 1 because its first strong character is RTL.
assert_eq!(bidi_info.paragraphs.len(), 1);
let para = &bidi_info.paragraphs[0];
assert_eq!(para.level.number(), 1);
assert_eq!(para.level.is_rtl(), true);

// Re-ordering is done after wrapping each paragraph into a sequence of
// lines. For this example, I'll just use a single line that spans the
// entire paragraph.
let line = para.range.clone();

let display = bidi_info.reorder_line(para, line);
assert_eq!(display, concat![
  "a",
  "b",
  "c",
  "ג",
  "ב",
  "א",
]);

特性

• std：默认启用，但可以禁用以使unicode_bidi与#![no_std] + alloc兼容。
• hardcoded-data：默认启用。包括硬编码的Unicode双向数据以及更便捷的API。
• serde：为相关类型添加了 serde::Serialize 和 serde::Deserialize 实现。