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Apply visual run resets to line range. #55

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merged 1 commit into from
Apr 6, 2021
Merged

Apply visual run resets to line range. #55

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15 changes: 12 additions & 3 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -364,14 +364,16 @@ impl<'text> BidiInfo<'text> {
assert!(line.end <= self.levels.len());

let mut levels = self.levels.clone();
let line_classes = &self.original_classes[line.clone()];
let line_levels = &mut levels[line.clone()];

// Reset some whitespace chars to paragraph level.
// <http://www.unicode.org/reports/tr9/#L1>
let line_str: &str = &self.text[line.clone()];
let mut reset_from: Option<usize> = Some(0);
let mut reset_to: Option<usize> = None;
for (i, c) in line_str.char_indices() {
match self.original_classes[i] {
match line_classes[i] {
// Ignored by X9
RLE | LRE | RLO | LRO | PDF | BN => {}
// Segment separator, Paragraph separator
Expand All @@ -395,7 +397,7 @@ impl<'text> BidiInfo<'text> {
if let (Some(from), Some(to)) = (reset_from, reset_to) {
#[cfg_attr(feature = "cargo-clippy", allow(needless_range_loop))]
for j in from..to {
levels[j] = para.level;
line_levels[j] = para.level;
}
reset_from = None;
reset_to = None;
Expand All @@ -404,7 +406,7 @@ impl<'text> BidiInfo<'text> {
if let Some(from) = reset_from {
#[cfg_attr(feature = "cargo-clippy", allow(needless_range_loop))]
for j in from..line_str.len() {
levels[j] = para.level;
line_levels[j] = para.level;
}
}

Expand Down Expand Up @@ -823,6 +825,13 @@ mod tests {
vec![Level::vec(&[0, 0])]
);

let text = "aa טֶ";
let bidi_info = BidiInfo::new(text, None);
assert_eq!(
bidi_info.reordered_levels(&bidi_info.paragraphs[0], 3..7),
Level::vec(&[0, 0, 0, 1, 1, 1, 1]),
)

/* TODO
/// BidiTest:69635 (AL ET EN)
let text = "\u{060B}\u{20CF}\u{06F9}";
Expand Down