omdGroupNode

Represents a single grouping symbol, such as ( or ), as a leaf node in the expression tree. This node is primarily used for visual representation and layout, rather than mathematical operations.

Class Definition

export class omdGroupNode extends omdLeafNode

Constructor

`new omdGroupNode(nodeData)`

Creates a new omdGroupNode instance.

nodeData (string): The single character string representing the grouping symbol (e.g., '(', ')', '[', ']').

Public Properties

symbol (string): The grouping symbol character (e.g., '(').
type (string): Always "parenthesis" for this node type.
textElement (jsvgTextLine): The internal jsvgTextLine instance responsible for rendering the symbol.

Public Methods

`clone()`

Creates a deep clone of the group node. The new node's provenance array is updated to include the original node's ID.

Returns: omdGroupNode - A new, identical instance of the group node.

`computeDimensions()`

Calculates the dimensions of the node based on its text content. Unlike other leaf nodes, omdGroupNode does not add extra padding around the symbol, allowing for tighter visual integration.

Overrides: omdLeafNode.computeDimensions().

`updateLayout()`

Updates the position of the node's internal text element. This method primarily calls the superclass's updateLayout.

Overrides: omdLeafNode.updateLayout().

`toMathJSNode()`

Converts the omdGroupNode to a math.js-compatible AST format. It represents the grouping symbol as a SymbolNode.

Returns: object - A math.js-compatible AST node with type: "SymbolNode" and name set to the grouping symbol. The returned object also includes a clone method for compatibility.

Internal Methods

parseSymbol(nodeData): Extracts the symbol from the constructor's nodeData. Returns the input string unchanged.
parseType(): Sets the node's type. Always returns "parenthesis".

Example

// Create grouping symbols
const leftParen = new omdGroupNode('(');
const rightParen = new omdGroupNode(')');
const leftBracket = new omdGroupNode('[');

// Render a symbol
const node = new omdGroupNode('(');
node.setFontSize(24);
node.initialize(); // Computes dimensions and layout

// Add to an SVG container to display
// const svgContainer = new jsvgContainer();
// svgContainer.addChild(node);
// document.body.appendChild(svgContainer.svgObject);

OMD Documentation