Struct LineWrapper 

pub struct LineWrapper { /* private fields */ }

The GPUI line wrapper, used to wrap lines of text to a given width.

Implementations

impl LineWrapper

pub const MAX_INDENT: u32 = 256

The maximum indent that can be applied to a line.

pub fn new( font_id: FontId, font_size: Pixels, text_system: Arc<dyn TextSystem>, ) -> Self

Creates a wrapper that measures and truncates text through text_system.

pub fn wrap_line<'a>( &'a mut self, fragments: &'a [LineFragment<'_>], wrap_width: Pixels, ) -> impl Iterator<Item = Boundary> + 'a

Wrap a line of text to the given width with this wrapper’s font and font size.

pub fn should_truncate_line( &mut self, line: &str, truncate_width: Pixels, truncation_affix: &str, truncate_from: TruncateFrom, ) -> Option<usize>

Determines if a line should be truncated based on its width.

Returns the truncation index in line.

pub fn truncate_line<'a>( &mut self, line: SharedString, truncate_width: Pixels, truncation_affix: &str, runs: &'a [TextRun], truncate_from: TruncateFrom, ) -> (SharedString, Cow<'a, [TextRun]>)

Truncate a line of text to the given width with this wrapper’s font and font size.

pub fn truncate_wrapped_line<'a>( &mut self, text: SharedString, wrap_width: Pixels, max_lines: usize, truncation_affix: &str, runs: &'a [TextRun], truncate_from: TruncateFrom, ) -> (SharedString, Cow<'a, [TextRun]>)

Truncate text to fit within a given number of wrapped lines.

Unlike truncate_line which treats the text as a flat width budget (width * max_lines), this method accounts for word-boundary wrapping: it walks through characters once, tracking wrap boundaries and the truncation point simultaneously. When text overflows on the last allowed line, it truncates there and appends the affix.

For max_lines == 1, this delegates to truncate_line.

pub fn is_word_char(c: char) -> bool

Any character in this list should be treated as a word character, meaning it can be part of a word that should not be wrapped. Returns whether c may be part of a word that should not be wrapped.

pub fn width_for_char(&mut self, c: char) -> Pixels

The advance width of c in this wrapper’s font, cached after first use.