77 lines
1.9 KiB
JavaScript
77 lines
1.9 KiB
JavaScript
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/**
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* @typedef {import('../../../model').Base} Base
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*
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* @typedef {import('../../../util/Types').Point} Point
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*
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* @typedef {import('../Modeling').ModelingCreateConnectionHints} ModelingCreateConnectionHints
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*
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* @typedef {import('../../../core/Canvas').default} Canvas
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* @typedef {import('../../../layout/BaseLayouter').default} Layouter
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*/
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/**
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* @param {Canvas} canvas
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* @param {Layouter} layouter
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*/
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export default function CreateConnectionHandler(canvas, layouter) {
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this._canvas = canvas;
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this._layouter = layouter;
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}
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CreateConnectionHandler.$inject = [ 'canvas', 'layouter' ];
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// api //////////////////////
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/**
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* Creates a new connection between two elements.
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*
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* @param {Object} context
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* @param {Base} context.source The source.
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* @param {Base} context.target The target.
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* @param {Shape} context.parent The parent.
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* @param {number} [context.parentIndex] The optional index at which to add the
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* connection to the parent's children.
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* @param {ModelingCreateConnectionHints} [context.hints] The optional hints.
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*/
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CreateConnectionHandler.prototype.execute = function(context) {
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var connection = context.connection,
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source = context.source,
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target = context.target,
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parent = context.parent,
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parentIndex = context.parentIndex,
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hints = context.hints;
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if (!source || !target) {
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throw new Error('source and target required');
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}
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if (!parent) {
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throw new Error('parent required');
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}
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connection.source = source;
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connection.target = target;
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if (!connection.waypoints) {
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connection.waypoints = this._layouter.layoutConnection(connection, hints);
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}
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// add connection
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this._canvas.addConnection(connection, parent, parentIndex);
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return connection;
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};
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CreateConnectionHandler.prototype.revert = function(context) {
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var connection = context.connection;
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this._canvas.removeConnection(connection);
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connection.source = null;
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connection.target = null;
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return connection;
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};
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