Struct unicode_bidi::BidiInfo[][src]

pub struct BidiInfo<'text> {
    pub text: &'text str,
    pub original_classes: Vec<BidiClass>,
    pub levels: Vec<Level>,
    pub paragraphs: Vec<ParagraphInfo>,
}
Expand description

Bidi information of the text.

The original_classes and levels vectors are indexed by byte offsets into the text. If a character is multiple bytes wide, then its class and level will appear multiple times in these vectors.

Fields

text: &'text str

The text

original_classes: Vec<BidiClass>

The BidiClass of the character at each byte in the text.

levels: Vec<Level>

The directional embedding level of each byte in the text.

paragraphs: Vec<ParagraphInfo>

The boundaries and paragraph embedding level of each paragraph within the text.

TODO: Use SmallVec or similar to avoid overhead when there are only one or two paragraphs? Or just don’t include the first paragraph, which always starts at 0?

Implementations

Split the text into paragraphs and determine the bidi embedding levels for each paragraph.

TODO: In early steps, check for special cases that allow later steps to be skipped. like text that is entirely LTR. See the nsBidi class from Gecko for comparison.

TODO: Support auto-RTL base direction

Re-order a line based on resolved levels and return only the embedding levels, one Level per byte.

Re-order a line based on resolved levels and return only the embedding levels, one Level per character.

Re-order a line based on resolved levels and return the line in display order.

Find the level runs within a line and return them in visual order.

line is a range of bytes indices within levels.

http://www.unicode.org/reports/tr9/#Reordering_Resolved_Levels

If processed text has any computed RTL levels

This information is usually used to skip re-ordering of text when no RTL level is present

Trait Implementations

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This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

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