Struct EditorSnapshot 

pub struct EditorSnapshot {
    pub version: u32,
    pub mode: SnapshotMode,
    pub cursor: (u32, u32),
    pub lines: Vec<String>,
    pub viewport_top: u32,
    pub registers: Registers,
    pub file_marks: HashMap<char, (u32, u32)>,
}

Coarse editor snapshot suitable for serde round-tripping.

Today’s shape is intentionally minimal — it carries only the bits the runtime crate::Editor knows how to round-trip without the trait extraction (mode, cursor, lines, viewport top, settings). Once Editor<B: Buffer, H: Host> ships under phase 5, this struct grows to cover full SPEC state: registers, marks, jump list, change list, undo tree, full options.

Hosts that persist editor state between sessions should:

• Treat the snapshot as opaque. Don’t manually mutate fields.
• Always check version after deserialization; reject on mismatch rather than attempt migration. The 0.0.x churn drops compatibility freely.

Fields

version: u32

Format version. Bumped on every structural change. Hosts use this to detect mismatched persisted state.

mode: SnapshotMode

Mode at snapshot time (status-line granularity).

cursor: (u32, u32)

Cursor (row, col) in byte indexing.

lines: Vec<String>

Buffer lines. Trailing \n not included.

viewport_top: u32

Viewport top line at snapshot time.

registers: Registers

Register bank. Vim’s "", "0–"9, "a–"z, "+/"*. Skipped for Eq/PartialEq because crate::Registers doesn’t derive them today.

file_marks: HashMap<char, (u32, u32)>

Uppercase / “file” marks ('A–'Z). Survive set_content calls so they round-trip across tab swaps in the host. Lowercase marks are buffer-local and live on the VimState.

Implementations

impl EditorSnapshot

pub const VERSION: u32 = 3

Current snapshot format version.

Bumped to 2 in v0.0.8: registers added. Bumped to 3 in v0.0.9: file_marks added.

Trait Implementations

impl Clone for EditorSnapshot

fn clone(&self) -> EditorSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EditorSnapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EditorSnapshot

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for EditorSnapshot

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.