Crate scrive_core 

scrive-core — the headless core of the scrive code editor.

This crate owns everything about what the editor shows and what changed, and knows nothing about pixels: no iced, no winit, no renderer. The iced integration lives in the sibling scrive-iced crate, which depends on this one — the dependency points one way, so the editing engine can be tested and reused without dragging in a GUI toolkit.

The one load-bearing idea: one fact, one owner

Every derived position — a caret, a diagnostic squiggle, a snippet stop — moves through a single mapping function on every edit, and every change is a single atomic transaction with a mechanically-derived inverse. Almost every serious editor bug is two copies of one fact drifting apart; keeping each position in exactly one place, moved through one patch, is the structural antidote.

Where do I…?

• store text / convert coordinates → buffer, coords
• apply an edit / undo / redo → transaction, history
• move or extend the caret → selection, movement
• type / paste / indent → verbs
• expand tabs to columns → display_map
• syntax-highlight a line → highlight
• attach diagnostics / snippet stops → decorations
• complete / hover / signature help → intel::providers

Re-exports

pub use bracket::Bracket;

pub use bracket::BracketConfig;

pub use bracket::Brackets;

pub use buffer::Buffer;

pub use buffer::DocId;

pub use buffer::EolFlavor;

pub use buffer::LoadError;

pub use buffer::Revision;

pub use buffer::Snapshot;

pub use coords::Bias;

pub use coords::Point;

pub use decorations::DecorationId;

pub use decorations::DecorationKind;

pub use decorations::DecorationStore;

pub use decorations::Diagnostic;

pub use decorations::DiagnosticsOutcome;

pub use decorations::EmptyPolicy;

pub use decorations::Severity;

pub use decorations::Stickiness;

pub use decorations::TrackedRange;

pub use display_map::default_tab_size;

pub use display_map::BufferRow;

pub use display_map::DisplayChunk;

pub use display_map::DisplayChunks;

pub use display_map::DisplayEdit;

pub use display_map::DisplayPoint;

pub use display_map::DisplayRow;

pub use display_map::TabMap;

pub use document::Document;

pub use document::RevealMode;

pub use find::default_find_debounce;

pub use find::FindQuery;

pub use find::FindState;

pub use find::FIND_MATCH_CAP;

pub use fold_map::FoldMap;

pub use fold_map::FoldSet;

pub use fold_map::InlineFold;

pub use fold_map::VisibleRow;

pub use highlight::HIGHLIGHT_CHECKPOINT_STRIDE;

pub use highlight::HIGHLIGHT_MAX_LINES_PER_CALL;

pub use highlight::HIGHLIGHT_MAX_WINDOW_ROWS;

pub use highlight::HIGHLIGHT_WINDOW_SLACK;

pub use highlight::padded_highlight_window;

pub use highlight::tokenize_segment;

pub use highlight::HighlightCache;

pub use highlight::HighlightEngine;

pub use highlight::HighlightSpan;

pub use highlight::Highlighter;

pub use highlight::Rgba;

pub use highlight::SegmentBoundary;

pub use highlight::SegmentStart;

pub use highlight::SegmentTokens;

pub use highlight::SpanStyle;

pub use highlight::SyntaxDef;

pub use highlight::TokenTheme;

pub use history::GroupingHint;

pub use history::OpClass;

pub use intel::completion::CompletionController;

pub use intel::completion::CompletionState;

pub use intel::completion::PopupList;

pub use intel::hover::Hover;

pub use intel::hover::HoverCx;

pub use intel::hover::HoverInfo;

pub use intel::hover::HOVER_IDLE_DELAY_MS;

pub use intel::signature::SignatureCx;

pub use intel::signature::SignatureHelp;

pub use intel::signature::SignatureInfo;

pub use intel::snippet::CaretOutcome;

pub use intel::snippet::Snippet;

pub use intel::snippet::SnippetError;

pub use intel::snippet::SnippetSession;

pub use intel::snippet::TabOutcome;

pub use intel::snippet::TabStop;

pub use intel::providers::is_completion_word_char;

pub use intel::providers::CompletionCx;

pub use intel::providers::CompletionItem;

pub use intel::providers::CompletionKind;

pub use intel::providers::CompletionTrigger;

pub use intel::providers::Completions;

pub use intel::providers::InsertText;

pub use intel::providers::LOOKBACK_LINES;

pub use movement::move_selections;

pub use movement::ColumnDir;

pub use movement::Granularity;

pub use movement::Motion;

pub use patch::Edit;

pub use patch::Patch;

pub use row_layout::tail_start_col;

pub use row_layout::virtual_cell;

pub use row_layout::CaretCell;

pub use row_layout::Chip;

pub use row_layout::DisplayPosition;

pub use row_layout::HeaderHit;

pub use row_layout::HeaderLayout;

pub use row_layout::RowLayout;

pub use row_layout::TailGlyph;

pub use row_layout::FOLD_PLACEHOLDER_CELLS;

pub use row_layout::INLINE_CHIP_CELLS;

pub use selection::Selection;

pub use selection::SelectionId;

pub use selection::SelectionSet;

pub use transaction::Committed;

pub use transaction::EditOp;

pub use transaction::TransactionError;

pub use verbs::default_indent_size;

Modules

bracket

Bracket matching — the shared structural pass behind bracket-pair colorization, matching-bracket highlight, indent guides, and folding. ()/[]/{} pair by a stack automaton (quotes are not nestable), yielding each bracket’s nesting depth and matched-partner offset and flagging the unmatched.

buffer

The document text store: a rope.

coords

Buffer-space coordinates and the primitives every position shares.

decorations

Tracked-range decorations: the one store, one mover for diagnostics, snippet stops, auto-close regions, and find matches.

display_map

The display map: buffer coordinates ↔ display coordinates, tab expansion only.

document

The document aggregate: the buffer plus its edit history and every derived view (selections, decorations, highlight cache, brackets, folds, find).

find

Find — the search core.

fold_map

Code folding — bracket-anchored. A fold is a collapsed bracket pair, identified by the byte offset of its opener (([{). That offset is the only thing stored; it rides each committed transaction’s Patch via Patch::map_offset, and the fold’s extent (which rows are hidden) is re-derived from the live Brackets pass every frame.

highlight

Syntax highlighting — a GUI-free public surface over a private syntect engine. Syntect is named only inside this module; nothing from it crosses the pub line, so the GUI crate never has to pin syntect’s version.

history

Undo/redo as a branching tree, the grouping mechanism, and dirty tracking.

intel

Language services — completion, signature help, hover.

movement

Caret movement — the motions and the two combinators that apply them to a SelectionSet.

patch

The change currency: Edit / Patch and the one position-mapping function every derived position flows through.

row_layout

Per-row horizontal projection — the one owner of byte-column ↔ display-cell math on rows with collapsed inline folds, and of the collapsed block header’s head … tail one-line layout.

selection

Selections and the multi-cursor set.

transaction

The atomic multi-range transaction engine.

verbs

The editing verbs: type, backspace, delete, enter, paste, and (out)dent. Each turns the current selections into one atomic multi-range transaction, then places a caret after each edit — so every verb is multi-cursor-correct for free (one op per selection).