Enum ChangeEvent 

pub enum ChangeEvent {
    SetValue {
        addr: CellRef,
        old_value: Option<LiteralValue>,
        old_formula: Option<ASTNode>,
        new: LiteralValue,
    },
    SetFormula {
        addr: CellRef,
        old_value: Option<LiteralValue>,
        old_formula: Option<ASTNode>,
        new: ASTNode,
    },
    SetRowVisibility {
        sheet_id: SheetId,
        row0: u32,
        source: RowVisibilitySource,
        old_hidden: bool,
        new_hidden: bool,
    },
    AddVertex {
        id: VertexId,
        coord: Coord,
        sheet_id: SheetId,
        value: Option<LiteralValue>,
        formula: Option<ASTNode>,
        kind: Option<VertexKind>,
        flags: Option<u8>,
    },
    RemoveVertex {
        id: VertexId,
        old_value: Option<LiteralValue>,
        old_formula: Option<ASTNode>,
        old_dependencies: Vec<VertexId>,
        old_dependents: Vec<VertexId>,
        coord: Option<Coord>,
        sheet_id: Option<SheetId>,
        kind: Option<VertexKind>,
        flags: Option<u8>,
    },
    CompoundStart {
        description: String,
        depth: usize,
    },
    CompoundEnd {
        depth: usize,
    },
    VertexMoved {
        id: VertexId,
        sheet_id: SheetId,
        old_coord: Coord,
        new_coord: Coord,
    },
    FormulaAdjusted {
        id: VertexId,
        addr: Option<CellRef>,
        old_ast: ASTNode,
        new_ast: ASTNode,
    },
    NamedRangeAdjusted {
        name: String,
        scope: NameScope,
        old_definition: NamedDefinition,
        new_definition: NamedDefinition,
    },
    EdgeAdded {
        from: VertexId,
        to: VertexId,
    },
    EdgeRemoved {
        from: VertexId,
        to: VertexId,
    },
    DefineName {
        name: String,
        scope: NameScope,
        definition: NamedDefinition,
    },
    UpdateName {
        name: String,
        scope: NameScope,
        old_definition: NamedDefinition,
        new_definition: NamedDefinition,
    },
    DeleteName {
        name: String,
        scope: NameScope,
        old_definition: Option<NamedDefinition>,
    },
    SpillCommitted {
        anchor: VertexId,
        old: Option<SpillSnapshot>,
        new: SpillSnapshot,
    },
    SpillCleared {
        anchor: VertexId,
        old: SpillSnapshot,
    },
    StagedFormulaCellChanged {
        sheet: String,
        row: u32,
        col: u32,
        old: Option<String>,
        new: Option<String>,
    },
}

Represents a single change to the dependency graph

Variants

SetValue

Fields

addr: CellRef

old_value: Option<LiteralValue>

old_formula: Option<ASTNode>

new: LiteralValue

SetFormula

Fields

addr: CellRef

old_value: Option<LiteralValue>

old_formula: Option<ASTNode>

new: ASTNode

SetRowVisibility

Fields

sheet_id: SheetId

row0: u32

source: RowVisibilitySource

old_hidden: bool

new_hidden: bool

AddVertex

Vertex creation snapshot (for undo). Minimal for now.

Fields

id: VertexId

coord: Coord

sheet_id: SheetId

value: Option<LiteralValue>

formula: Option<ASTNode>

kind: Option<VertexKind>

flags: Option<u8>

RemoveVertex

Fields

id: VertexId

old_value: Option<LiteralValue>

old_formula: Option<ASTNode>

old_dependencies: Vec<VertexId>

old_dependents: Vec<VertexId>

coord: Option<Coord>

sheet_id: Option<SheetId>

kind: Option<VertexKind>

flags: Option<u8>

CompoundStart

Fields

description: String

depth: usize

CompoundEnd

Fields

depth: usize

VertexMoved

Fields

id: VertexId

sheet_id: SheetId

old_coord: Coord

new_coord: Coord

FormulaAdjusted

Fields

id: VertexId

addr: Option<CellRef>

Cell address for replay. May be None for non-cell formula vertices.

old_ast: ASTNode

new_ast: ASTNode

NamedRangeAdjusted

Fields

name: String

scope: NameScope

old_definition: NamedDefinition

new_definition: NamedDefinition

EdgeAdded

Fields

from: VertexId

to: VertexId

EdgeRemoved

Fields

from: VertexId

to: VertexId

DefineName

Fields

name: String

scope: NameScope

definition: NamedDefinition

UpdateName

Fields

name: String

scope: NameScope

old_definition: NamedDefinition

new_definition: NamedDefinition

DeleteName

Fields

name: String

scope: NameScope

old_definition: Option<NamedDefinition>

SpillCommitted

Fields

anchor: VertexId

old: Option<SpillSnapshot>

new: SpillSnapshot

SpillCleared

Fields

anchor: VertexId

old: SpillSnapshot

StagedFormulaCellChanged

Workbook-level per-cell staged formula delta used to keep deferred edits undoable.

Replaces the former StagedFormulaStateChanged full before/after snapshot pair (which made interactive set_formula O(N) per edit and O(N^2) in changelog memory — see #126). Each edit records only the affected cell’s staged text transition, so a sequence of N edits costs O(N) total.

• old: the staged formula text for the cell before the edit, if any.
• new: the staged formula text for the cell after the edit, if any.

Undo restores old (re-stage if Some, clear if None); redo applies new (re-stage if Some, clear if None).

Fields

sheet: String

row: u32

col: u32

old: Option<String>

new: Option<String>

Trait Implementations

impl Clone for ChangeEvent

fn clone(&self) -> ChangeEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChangeEvent

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

Formats the value using the given formatter.

impl PartialEq for ChangeEvent

fn eq(&self, other: &ChangeEvent) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ChangeEvent