Struct StickyContext 

pub struct StickyContext {
    pub rows: Vec<StickyContextRow>,
    pub version: MatrixVersion,
    pub bg: Option<u32>,
    pub line_numbers: bool,
    pub line_number_fg: Option<u32>,
    pub active_bg: Option<u32>,
    pub has_separator: bool,
}

The pane’s pinned context strip, outermost scope first.

Empty is the overwhelmingly common case — no context plugin loaded, or nothing enclosing the cursor has scrolled away — and it is represented as an empty rows rather than an Option so both renderers can iterate unconditionally.

Fields

rows: Vec<StickyContextRow>

Outermost first: the row nearest the text is the nearest enclosing scope, so the strip reads as a continuation of the code.

version: MatrixVersion

The build’s version stamp — the same MatrixVersion the pane’s DisplayMatrix carries, so a renderer can tell the two came from one build.

bg: Option<u32>

Resolved backdrop (0xRRGGBB) from the sticky.context.background theme element, or None when the theme leaves it unset.

Resolved once here rather than per row in each renderer: the strip is host chrome — the host builds, reserves and paints it — so the host owns its styling, while the plugin owns only the scopes. Without a backdrop the strip is the same colour as the code beneath it and reads as ordinary text that will not scroll, which is what prompted this.

line_numbers: bool

TC.8: whether the rows show their source line number in the gutter (context.line-numbers).

Resolved here, alongside the backdrop, for the same reason: the strip is host chrome, so the host owns its presentation and neither renderer reads a plugin option. Both peers then reduce to one expression — line_numbers.then_some(row.source_line) — which is hard to get differently wrong in two places.

line_number_fg: Option<u32>

TC.11: resolved sticky.context.line_number foreground, or None when the theme leaves it unset (the renderer then uses its default gutter colour, as it does for document rows).

active_bg: Option<u32>

TC.11: resolved sticky.context.active backdrop for the INNERMOST row — the scope the cursor is actually in.

Rows are outermost-first, so this applies to the last one. It is the line the reader is looking for; giving it the same backdrop as its ancestors makes a deep strip read as an undifferentiated block.

has_separator: bool

TC.12: whether the LAST row is a separator rule rather than a scope.

The rule is built as a real row, not carried as a glyph for renderers to append, so that it is counted by len() — which is what the scroll model reserves from. A separator drawn outside the row list would be one row the reservation did not know about, and the text under it would sit one line too high.

Implementations

impl StickyContext

pub fn empty() -> Self

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

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

Index of the innermost SCOPE row — the one the cursor is in — skipping a trailing separator. None when there are no scope rows.

Trait Implementations

impl Clone for StickyContext

fn clone(&self) -> StickyContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StickyContext

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

Formats the value using the given formatter.

impl Default for StickyContext

fn default() -> StickyContext

Returns the “default value” for a type.