Struct ViewLineMapping 

pub struct ViewLineMapping {
    pub char_source_bytes: Vec<Option<usize>>,
    pub visual_to_char: Vec<usize>,
    pub line_end_byte: usize,
    pub is_plugin_virtual: bool,
}

Mapping from visual row to buffer positions for mouse click handling Each entry represents one visual row with byte position info for click handling

Fields

char_source_bytes: Vec<Option<usize>>

Source byte offset for each character (None for injected/virtual content)

visual_to_char: Vec<usize>

Character index at each visual column (for O(1) mouse clicks)

line_end_byte: usize

Last valid byte position in this visual row (newline for real lines, last char for wrapped) Clicks past end of visible text position cursor here

is_plugin_virtual: bool

True iff this visual row was rendered for a plugin-injected virtual line (live-diff deletion overlays, markdown_compose borders, …) rather than for actual buffer content. Used by move_visual_line to skip past these rows without stranding the cursor on a position whose line_end_byte was inherited from the previous source row.

Implementations

impl ViewLineMapping

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 nearest_source_byte(&self, goal_col: usize) -> Option<usize>

Find the nearest source byte to a given visual column, searching outward. Returns the source byte at the closest valid visual column.

pub fn contains_byte(&self, byte_pos: usize) -> bool

Check if this visual row contains the given byte position

pub fn first_source_byte(&self) -> Option<usize>

Get the first source byte position in this row (if any)

Trait Implementations

impl Clone for ViewLineMapping

fn clone(&self) -> ViewLineMapping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ViewLineMapping

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

Formats the value using the given formatter.

impl Default for ViewLineMapping

fn default() -> ViewLineMapping

Returns the “default value” for a type.