Struct HunkRenderOptions 

pub struct HunkRenderOptions<'a, 'h> {

    pub context: usize,
    pub interhunk: usize,
    pub heading: Option<&'a mut HeadingFn<'h>>,
    pub colors: Option<RenderColors<'a>>,
    pub word_diff: Option<&'a mut dyn HunkWordDiff>,
    pub ws_error: Option<WsErrorHighlight>,
    pub ws_ignore: WsIgnore,
    pub algorithm: DiffAlgorithm,
    pub indent_heuristic: bool,
    pub change_ignore: Option<&'a ChangeIgnore<'a>>,
    pub line_ranges: Option<&'a [LineRange]>,
    pub color_moved: Option<ColorMoved>,
    pub anchors: &'a [Vec<u8>],
}

Hunk-shaping and styling options for render_hunks.

Lifetimes are split so the funcname / word-diff hooks can be borrowed mutably while colors is borrowed shared.

Fields

context: usize

Lines of context around each change (-U<n>, default DEFAULT_CONTEXT).

interhunk: usize

Extra inter-hunk merging distance (--inter-hunk-context).

heading: Option<&'a mut HeadingFn<'h>>

Per-line section-heading classifier; None emits headerless hunks.

colors: Option<RenderColors<'a>>

ANSI palette when color output is enabled.

word_diff: Option<&'a mut dyn HunkWordDiff>

Word-diff body hook (replaces the +/- line bodies of each hunk).

ws_error: Option<WsErrorHighlight>

--ws-error-highlight configuration: when set and colors are on, the renderer paints whitespace errors on the selected line kinds with colors.whitespace (git’s emit_line_ws_markup). None disables it.

ws_ignore: WsIgnore

Whitespace-ignore flags (-w, -b, --ignore-space-at-eol, --ignore-cr-at-eol): applied to the line-level comparison so whitespace-only changes do not appear as diffs (git’s XDF_WHITESPACE_FLAGS).

algorithm: DiffAlgorithm

The line-diff algorithm to use (Myers / patience / histogram).

indent_heuristic: bool

Indent heuristic (--indent-heuristic / diff.indentHeuristic): when set, change groups that can slide within surrounding identical lines are shifted to the most readable boundary (git’s XDF_INDENT_HEURISTIC scoring in xdl_change_compact). The base change compaction — sliding groups as far down as possible and aligning add/delete pairs — always runs; this flag only enables the indent-based slider scoring. Defaults to true to match git’s diff.indentHeuristic default.

change_ignore: Option<&'a ChangeIgnore<'a>>

Change-group suppression (--ignore-blank-lines, -I<regex>): when set, change groups all of whose old and new lines are blank (and/or match a -I regex) are dropped from hunk emission, mirroring git’s xdl_mark_ignorable_lines / xdl_mark_ignorable_regex + xdl_get_hunk.

line_ranges: Option<&'a [LineRange]>

log -L: restrict the emitted hunks to the new-side (post-image) line ranges. Each range is 0-based, [start, end). When set, the renderer inflates context to the widest range span (so every change inside a range merges into one xdiff hunk), then clips the emitted lines back to the range boundaries — a port of diff.c’s line_range_* callbacks. Ranges must be sorted and disjoint. None disables the filter (every non-line-log caller).

color_moved: Option<ColorMoved>

--color-moved: classify moved +/- lines and paint them with the moved-color slots. None disables moved-code coloring.

anchors: &'a [Vec<u8>]

--anchored=<text> prefixes (git’s patience anchors). Only consulted when algorithm is DiffAlgorithm::Patience; empty (the default) is plain patience. Forces the matching unique lines to stay aligned.

Trait Implementations

impl Default for HunkRenderOptions<'_, '_>

fn default() -> Self

Returns the “default value” for a type.