Take a snapshot of the current document state for undo.

Snapshot the active tab's live document/camera back into `tabs`, so it can be restored later. Call before changing which tab is active.

Sync CRDT state to local document. This should be called when receiving remote updates.

Update the current interaction.

Create a new text shape with font size.

Convert a world point to screen coordinates.

Add a point to the path.

Climb from `node` to the ancestor that is a direct child of `scope`, or `None` if `node` is not inside `scope`.

Build a message arrow through the given points with the given dashed state.

A diagram must import as a single group so it moves/edits as one unit.

Resolve absolute centers for a cluster's descendants once the cluster's own absolute center is known.

Detect back edges (edges to an ancestor on the DFS stack) with an iterative DFS so deeply nested input cannot overflow the stack.

Position the grid below the anchor.

Compute the point where the segment from a node's center toward `toward` exits the node's outline (bounding box, or radius for a circle, or rhombus fo

Move a shape one layer forward (towards front). Returns true if the shape was moved, false if already at front.

Parse Excalidraw library text and lay its icons out as a grid document, returning the tab name and the document. Returns `None` if the text is not a r

Build direct-child lists keyed by parent cluster (and a root list).

Clear the last snap result (call when dragging ends).

Compute elbow path between two points. Returns intermediate corner points (not including start and end).

Compute pressure based on drawing velocity. Fast movement = low pressure (thin line), slow movement = high pressure (thick line).

Consume a trailing `x`/`o` arrowhead (as in `--x`, `--o`) when it is at a token boundary, marking `arrow` accordingly. Returns the new index.

Convert a Parley BoundingBox to a Kurbo Rect.

Copy text to clipboard (fire and forget).

Generate corner handles plus a rotation handle for a bounding rectangle. The rotation handle is placed above the top-center, rotated by the shape's ro

Create a freehand preview from accumulated points.

Create a shape from start and end points with a specific seed.

Get the cursor byte offset (start of selection or cursor position).

Get the raw image data (decoded from base64).

Delete selected shapes.

Get the drag delta.

Detect smart guides for a single point (e.g., line/arrow endpoint) against shape bounds.

Disable collaboration.

Disconnect from the server.

Build a small centered text shape for an edge label.

Get a mutable reference to the PlainEditor.

Exit editing mode.

Export full document snapshot for initial sync.

Export the document as a snapshot (full state).

Extract embedded scene JSON from PNG data, if present.

Finish initialization after surface is created.

Fit the camera to show the given bounding box.

Format the shortcut for display (e.g., "Ctrl+S").

Get the accumulated freehand points (for final shape creation).

Get the accumulated freehand pressure values.

Get a shape by ID.

Get the manipulation handles for a shape.

Whether an element declares non-null `roundness` (curved rendering).

Check if a point is on the boundary (edge) of a shape's bounding box. Returns true if the point is within tolerance of any edge but not inside the int

Import updates from remote peer. Returns true if import was successful.

Clear the cached size (call when text properties change).

Check if a tool interaction is active.

Whether a poly-line's endpoints are close enough to be a closed shape.

True while the user is actively drawing — left mouse button held, or SPACE held (virtual left button for Paint-style keyboard drawing).

Check if a shape is selected.

Convert a library item's elements into one grouped [`Shape`], preserving the Excalidraw group hierarchy. Returns `None` if nothing is convertible.

Arrange library items into a uniform grid for display on a canvas. Each item's group is cloned and translated so its bounding box is centered in a gr

Test if any line segment (defined by consecutive points) intersects or is inside a rectangle.

List all documents in IndexedDB - triggers async list.

Assign a layer index to each node using longest-path ranking on the acyclic subgraph obtained by dropping back edges and self loops.

Get the underlying LoroDoc.

Size and relatively place the direct children of `scope` (a cluster index, or `None` for the root). Recurses into nested clusters first.

Vertical separator for panels.

Parse an Excalidraw color string (`transparent` or `#rgb`/`#rrggbb`/ `#rrggbbaa`) into a serializable color, defaulting to black.

Parse a CSS color string to Color32.

Determine the flow direction declared on a header or `direction` line.

Parse room and server parameters from a query string or hash.

Try to import shapes from clipboard text: Excalidraw scene JSON first, then Mermaid diagram source. The result will be available via `take_pending_exc

Get the peer ID for this client.

Minimum distance from a point to a polyline (sequence of connected segments).

Build a closed, white-filled polygon line from vertices.

Get the preview shape for the current interaction.

Remove a shape from the document.

Render full grid lines.

Render a placeholder for images that couldn't be loaded.

Get the roughness value for this sloppiness level.

Determine a link style from a single connector run.

Select all shapes.

Get snap points from a line/arrow's own endpoints, excluding the one being dragged.

Move a shape one layer backward (towards back). Returns true if the shape was moved, false if already at back.

Set user info (name, color).

Set the viewport size.