Struct LineMappings 

pub struct LineMappings {
    pub char_source_bytes: Vec<Option<usize>>,
    pub char_visual_cols: Vec<usize>,
    pub visual_to_char: Vec<usize>,
    pub total_visual_width: usize,
}

Per-line mappings that support all visual layout operations with O(1) lookups

Fields

char_source_bytes: Vec<Option<usize>>

Source byte for each character (indexed by char position) Length == number of characters in processed text

char_visual_cols: Vec<usize>

Visual column for each character (indexed by char position) For zero-width chars, this is the same as the previous char’s visual column

visual_to_char: Vec<usize>

Character index at each visual column (indexed by visual column) For double-width chars, consecutive visual columns map to the same char Length == total visual width of line

total_visual_width: usize

Total visual width of the line

Implementations

impl LineMappings

pub fn source_byte_at_char(&self, char_idx: usize) -> Option<usize>

Get source byte for a character at the given index

pub fn visual_col_at_char(&self, char_idx: usize) -> usize

Get visual column for a character at the given index

pub fn char_at_visual_col(&self, visual_col: usize) -> usize

Get character index at a given visual column (O(1) for mouse clicks)

pub fn source_byte_at_visual_col(&self, visual_col: usize) -> Option<usize>

Get source byte at a given visual column (O(1) for mouse clicks)

pub fn line_end_byte(&self) -> usize

Get the source byte at the end of the line

Trait Implementations

impl Clone for LineMappings

fn clone(&self) -> LineMappings

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LineMappings

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LineMappings

fn default() -> LineMappings

Returns the “default value” for a type.