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711 lines
24 KiB
711 lines
24 KiB
var util = require('../../../util');
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var Label = require('./shared/Label').default;
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var ComponentUtil = require('./shared/ComponentUtil').default;
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var CubicBezierEdge = require('./edges/CubicBezierEdge').default;
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var BezierEdgeDynamic = require('./edges/BezierEdgeDynamic').default;
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var BezierEdgeStatic = require('./edges/BezierEdgeStatic').default;
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var StraightEdge = require('./edges/StraightEdge').default;
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/**
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* An edge connects two nodes and has a specific direction.
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*/
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class Edge {
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/**
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* @param {Object} options values specific to this edge, must contain at least 'from' and 'to'
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* @param {Object} body shared state from Network instance
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* @param {Object} globalOptions options from the EdgesHandler instance
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* @param {Object} defaultOptions default options from the EdgeHandler instance. Value and reference are constant
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* @param {Object} edgeOptions option values specific for edges.
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*/
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constructor(options, body, globalOptions, defaultOptions, edgeOptions) {
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if (body === undefined) {
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throw new Error("No body provided");
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}
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// Since globalOptions is constant in values as well as reference,
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// Following needs to be done only once.
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this.options = util.bridgeObject(globalOptions);
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this.globalOptions = globalOptions;
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this.defaultOptions = defaultOptions;
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this.edgeOptions = edgeOptions;
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this.body = body;
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// initialize variables
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this.id = undefined;
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this.fromId = undefined;
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this.toId = undefined;
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this.selected = false;
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this.hover = false;
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this.labelDirty = true;
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this.baseWidth = this.options.width;
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this.baseFontSize = this.options.font.size;
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this.from = undefined; // a node
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this.to = undefined; // a node
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this.edgeType = undefined;
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this.connected = false;
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this.labelModule = new Label(this.body, this.options, true /* It's an edge label */);
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this.setOptions(options);
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}
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/**
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* Set or overwrite options for the edge
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* @param {Object} options an object with options
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* @returns {null|boolean} null if no options, boolean if date changed
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*/
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setOptions(options) {
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if (!options) {
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return;
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}
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Edge.parseOptions(this.options, options, true, this.globalOptions);
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if (options.id !== undefined) {
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this.id = options.id;
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}
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if (options.from !== undefined) {
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this.fromId = options.from;
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}
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if (options.to !== undefined) {
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this.toId = options.to;
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}
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if (options.title !== undefined) {
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this.title = options.title;
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}
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if (options.value !== undefined) {
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options.value = parseFloat(options.value);
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}
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let pile = [options, this.options, this.edgeOptions, this.defaultOptions];
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this.chooser = ComponentUtil.choosify('edge', pile);
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// update label Module
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this.updateLabelModule(options);
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this.labelModule.propagateFonts(this.edgeOptions, options, this.defaultOptions);
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let dataChanged = this.updateEdgeType();
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// if anything has been updates, reset the selection width and the hover width
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this._setInteractionWidths();
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// A node is connected when it has a from and to node that both exist in the network.body.nodes.
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this.connect();
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if (options.hidden !== undefined || options.physics !== undefined) {
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dataChanged = true;
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}
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return dataChanged;
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}
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/**
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*
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* @param {Object} parentOptions
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* @param {Object} newOptions
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* @param {boolean} [allowDeletion=false]
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* @param {Object} [globalOptions={}]
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* @param {boolean} [copyFromGlobals=false]
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*/
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static parseOptions(parentOptions, newOptions, allowDeletion = false, globalOptions = {}, copyFromGlobals = false) {
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var fields = [
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'arrowStrikethrough',
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'id',
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'from',
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'hidden',
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'hoverWidth',
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'label',
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'labelHighlightBold',
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'length',
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'line',
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'opacity',
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'physics',
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'scaling',
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'selectionWidth',
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'selfReferenceSize',
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'to',
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'title',
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'value',
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'width'
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];
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// only deep extend the items in the field array. These do not have shorthand.
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util.selectiveDeepExtend(fields, parentOptions, newOptions, allowDeletion);
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util.mergeOptions(parentOptions, newOptions, 'smooth', globalOptions);
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util.mergeOptions(parentOptions, newOptions, 'shadow', globalOptions);
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if (newOptions.dashes !== undefined && newOptions.dashes !== null) {
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parentOptions.dashes = newOptions.dashes;
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}
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else if (allowDeletion === true && newOptions.dashes === null) {
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parentOptions.dashes = Object.create(globalOptions.dashes); // this sets the pointer of the option back to the global option.
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}
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// set the scaling newOptions
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if (newOptions.scaling !== undefined && newOptions.scaling !== null) {
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if (newOptions.scaling.min !== undefined) {parentOptions.scaling.min = newOptions.scaling.min;}
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if (newOptions.scaling.max !== undefined) {parentOptions.scaling.max = newOptions.scaling.max;}
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util.mergeOptions(parentOptions.scaling, newOptions.scaling, 'label', globalOptions.scaling);
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}
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else if (allowDeletion === true && newOptions.scaling === null) {
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parentOptions.scaling = Object.create(globalOptions.scaling); // this sets the pointer of the option back to the global option.
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}
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// handle multiple input cases for arrows
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if (newOptions.arrows !== undefined && newOptions.arrows !== null) {
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if (typeof newOptions.arrows === 'string') {
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let arrows = newOptions.arrows.toLowerCase();
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parentOptions.arrows.to.enabled = arrows.indexOf("to") != -1;
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parentOptions.arrows.middle.enabled = arrows.indexOf("middle") != -1;
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parentOptions.arrows.from.enabled = arrows.indexOf("from") != -1;
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}
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else if (typeof newOptions.arrows === 'object') {
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'to', globalOptions.arrows);
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'middle', globalOptions.arrows);
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'from', globalOptions.arrows);
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}
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else {
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throw new Error("The arrow newOptions can only be an object or a string. Refer to the documentation. You used:" + JSON.stringify(newOptions.arrows));
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}
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}
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else if (allowDeletion === true && newOptions.arrows === null) {
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parentOptions.arrows = Object.create(globalOptions.arrows); // this sets the pointer of the option back to the global option.
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}
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// handle multiple input cases for color
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if (newOptions.color !== undefined && newOptions.color !== null) {
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let fromColor = newOptions.color;
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let toColor = parentOptions.color;
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// If passed, fill in values from default options - required in the case of no prototype bridging
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if (copyFromGlobals) {
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util.deepExtend(toColor, globalOptions.color, false, allowDeletion);
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} else {
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// Clear local properties - need to do it like this in order to retain prototype bridges
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for (var i in toColor) {
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if (toColor.hasOwnProperty(i)) {
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delete toColor[i];
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}
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}
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}
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if (util.isString(toColor)) {
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toColor.color = toColor;
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toColor.highlight = toColor;
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toColor.hover = toColor;
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toColor.inherit = false;
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if (fromColor.opacity === undefined) {
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toColor.opacity = 1.0; // set default
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}
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}
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else {
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let colorsDefined = false;
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if (fromColor.color !== undefined) {toColor.color = fromColor.color; colorsDefined = true;}
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if (fromColor.highlight !== undefined) {toColor.highlight = fromColor.highlight; colorsDefined = true;}
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if (fromColor.hover !== undefined) {toColor.hover = fromColor.hover; colorsDefined = true;}
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if (fromColor.inherit !== undefined) {toColor.inherit = fromColor.inherit;}
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if (fromColor.opacity !== undefined) {toColor.opacity = Math.min(1,Math.max(0,fromColor.opacity));}
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if (colorsDefined === true) {
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toColor.inherit = false;
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} else {
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if (toColor.inherit === undefined) {
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toColor.inherit = 'from'; // Set default
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}
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}
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}
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}
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else if (allowDeletion === true && newOptions.color === null) {
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parentOptions.color = util.bridgeObject(globalOptions.color); // set the object back to the global options
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}
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// handle the font settings
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if (newOptions.font !== undefined && newOptions.font !== null) {
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Label.parseOptions(parentOptions.font, newOptions);
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}
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else if (allowDeletion === true && newOptions.font === null) {
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parentOptions.font = util.bridgeObject(globalOptions.font); // set the object back to the global options
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}
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}
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/**
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*
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* @returns {{toArrow: boolean, toArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), toArrowType: *, middleArrow: boolean, middleArrowScale: (number|allOptions.edges.arrows.middle.scaleFactor|{number}|Array), middleArrowType: (allOptions.edges.arrows.middle.type|{string}|string|*), fromArrow: boolean, fromArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), fromArrowType: *, arrowStrikethrough: (*|boolean|allOptions.edges.arrowStrikethrough|{boolean}), color: undefined, inheritsColor: (string|string|string|allOptions.edges.color.inherit|{string, boolean}|Array|*), opacity: *, hidden: *, length: *, shadow: *, shadowColor: *, shadowSize: *, shadowX: *, shadowY: *, dashes: (*|boolean|Array|allOptions.edges.dashes|{boolean, array}), width: *}}
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*/
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getFormattingValues() {
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let toArrow = (this.options.arrows.to === true) || (this.options.arrows.to.enabled === true)
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let fromArrow = (this.options.arrows.from === true) || (this.options.arrows.from.enabled === true)
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let middleArrow = (this.options.arrows.middle === true) || (this.options.arrows.middle.enabled === true)
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let inheritsColor = this.options.color.inherit;
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let values = {
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toArrow: toArrow,
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toArrowScale: this.options.arrows.to.scaleFactor,
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toArrowType: this.options.arrows.to.type,
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middleArrow: middleArrow,
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middleArrowScale: this.options.arrows.middle.scaleFactor,
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middleArrowType: this.options.arrows.middle.type,
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fromArrow: fromArrow,
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fromArrowScale: this.options.arrows.from.scaleFactor,
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fromArrowType: this.options.arrows.from.type,
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arrowStrikethrough: this.options.arrowStrikethrough,
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color: (inheritsColor? undefined : this.options.color.color),
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inheritsColor: inheritsColor,
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opacity: this.options.color.opacity,
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hidden: this.options.hidden,
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length: this.options.length,
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shadow: this.options.shadow.enabled,
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shadowColor: this.options.shadow.color,
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shadowSize: this.options.shadow.size,
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shadowX: this.options.shadow.x,
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shadowY: this.options.shadow.y,
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dashes: this.options.dashes,
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width: this.options.width
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};
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if (this.selected || this.hover) {
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if (this.chooser === true) {
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if (this.selected) {
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let selectedWidth = this.options.selectionWidth;
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if (typeof selectedWidth === 'function') {
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values.width = selectedWidth(values.width);
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} else if (typeof selectedWidth === 'number') {
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values.width += selectedWidth;
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}
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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values.color = this.options.color.highlight;
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values.shadow = this.options.shadow.enabled;
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} else if (this.hover) {
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let hoverWidth = this.options.hoverWidth;
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if (typeof hoverWidth === 'function') {
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values.width = hoverWidth(values.width);
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} else if (typeof hoverWidth === 'number') {
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values.width += hoverWidth;
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}
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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values.color = this.options.color.hover;
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values.shadow = this.options.shadow.enabled;
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}
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} else if (typeof this.chooser === 'function') {
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this.chooser(values, this.options.id, this.selected, this.hover);
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if (values.color !== undefined) {
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values.inheritsColor = false;
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}
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if (values.shadow === false) {
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if ((values.shadowColor !== this.options.shadow.color) ||
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(values.shadowSize !== this.options.shadow.size) ||
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(values.shadowX !== this.options.shadow.x) ||
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(values.shadowY !== this.options.shadow.y)) {
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values.shadow = true;
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}
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}
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}
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} else {
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values.shadow = this.options.shadow.enabled;
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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}
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return values;
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}
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/**
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* update the options in the label module
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*
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* @param {Object} options
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*/
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updateLabelModule(options) {
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let pile = [options, this.edgeOptions, this.defaultOptions];
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this.labelModule.update(this.options, pile);
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if (this.labelModule.baseSize !== undefined) {
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this.baseFontSize = this.labelModule.baseSize;
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}
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}
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/**
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* update the edge type, set the options
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* @returns {boolean}
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*/
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updateEdgeType() {
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let smooth = this.options.smooth;
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let dataChanged = false;
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let changeInType = true;
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if (this.edgeType !== undefined) {
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if ((((this.edgeType instanceof BezierEdgeDynamic) &&
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(smooth.enabled === true) &&
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(smooth.type === 'dynamic'))) ||
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(((this.edgeType instanceof CubicBezierEdge) &&
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(smooth.enabled === true) &&
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(smooth.type === 'cubicBezier'))) ||
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(((this.edgeType instanceof BezierEdgeStatic) &&
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(smooth.enabled === true) &&
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(smooth.type !== 'dynamic') &&
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(smooth.type !== 'cubicBezier'))) ||
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(((this.edgeType instanceof StraightEdge) &&
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(smooth.type.enabled === false)))) {
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changeInType = false;
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}
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if (changeInType === true) {
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dataChanged = this.cleanup();
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}
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}
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if (changeInType === true) {
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if (smooth.enabled === true) {
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if (smooth.type === 'dynamic') {
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dataChanged = true;
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this.edgeType = new BezierEdgeDynamic(this.options, this.body, this.labelModule);
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} else if (smooth.type === 'cubicBezier') {
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this.edgeType = new CubicBezierEdge(this.options, this.body, this.labelModule);
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} else {
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this.edgeType = new BezierEdgeStatic(this.options, this.body, this.labelModule);
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}
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} else {
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this.edgeType = new StraightEdge(this.options, this.body, this.labelModule);
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}
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} else { // if nothing changes, we just set the options.
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this.edgeType.setOptions(this.options);
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}
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return dataChanged;
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}
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/**
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* Connect an edge to its nodes
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*/
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connect() {
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this.disconnect();
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this.from = this.body.nodes[this.fromId] || undefined;
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this.to = this.body.nodes[this.toId] || undefined;
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this.connected = (this.from !== undefined && this.to !== undefined);
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if (this.connected === true) {
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this.from.attachEdge(this);
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this.to.attachEdge(this);
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}
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else {
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if (this.from) {
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this.from.detachEdge(this);
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}
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if (this.to) {
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this.to.detachEdge(this);
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}
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}
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this.edgeType.connect();
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}
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/**
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* Disconnect an edge from its nodes
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*/
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disconnect() {
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if (this.from) {
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this.from.detachEdge(this);
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this.from = undefined;
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}
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if (this.to) {
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this.to.detachEdge(this);
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this.to = undefined;
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}
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this.connected = false;
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}
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/**
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* get the title of this edge.
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* @return {string} title The title of the edge, or undefined when no title
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* has been set.
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*/
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getTitle() {
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return this.title;
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}
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/**
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* check if this node is selecte
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* @return {boolean} selected True if node is selected, else false
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*/
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isSelected() {
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return this.selected;
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}
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/**
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* Retrieve the value of the edge. Can be undefined
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* @return {number} value
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*/
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getValue() {
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return this.options.value;
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}
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/**
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* Adjust the value range of the edge. The edge will adjust it's width
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* based on its value.
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* @param {number} min
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* @param {number} max
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* @param {number} total
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*/
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setValueRange(min, max, total) {
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if (this.options.value !== undefined) {
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var scale = this.options.scaling.customScalingFunction(min, max, total, this.options.value);
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var widthDiff = this.options.scaling.max - this.options.scaling.min;
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if (this.options.scaling.label.enabled === true) {
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var fontDiff = this.options.scaling.label.max - this.options.scaling.label.min;
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this.options.font.size = this.options.scaling.label.min + scale * fontDiff;
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}
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this.options.width = this.options.scaling.min + scale * widthDiff;
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}
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else {
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this.options.width = this.baseWidth;
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this.options.font.size = this.baseFontSize;
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}
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this._setInteractionWidths();
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this.updateLabelModule();
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}
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/**
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*
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* @private
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*/
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_setInteractionWidths() {
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if (typeof this.options.hoverWidth === 'function') {
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this.edgeType.hoverWidth = this.options.hoverWidth(this.options.width);
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} else {
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this.edgeType.hoverWidth = this.options.hoverWidth + this.options.width;
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}
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if (typeof this.options.selectionWidth === 'function') {
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this.edgeType.selectionWidth = this.options.selectionWidth(this.options.width);
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} else {
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this.edgeType.selectionWidth = this.options.selectionWidth + this.options.width;
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}
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}
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/**
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* Redraw a edge
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* Draw this edge in the given canvas
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* The 2d context of a HTML canvas can be retrieved by canvas.getContext("2d");
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* @param {CanvasRenderingContext2D} ctx
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*/
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draw(ctx) {
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let values = this.getFormattingValues();
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if (values.hidden) {
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return;
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}
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// get the via node from the edge type
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let viaNode = this.edgeType.getViaNode();
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let arrowData = {};
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// restore edge targets to defaults
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this.edgeType.fromPoint = this.edgeType.from;
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this.edgeType.toPoint = this.edgeType.to;
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// from and to arrows give a different end point for edges. we set them here
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if (values.fromArrow) {
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arrowData.from = this.edgeType.getArrowData(ctx, 'from', viaNode, this.selected, this.hover, values);
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if (values.arrowStrikethrough === false)
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this.edgeType.fromPoint = arrowData.from.core;
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}
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if (values.toArrow) {
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arrowData.to = this.edgeType.getArrowData(ctx, 'to', viaNode, this.selected, this.hover, values);
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if (values.arrowStrikethrough === false)
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this.edgeType.toPoint = arrowData.to.core;
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}
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// the middle arrow depends on the line, which can depend on the to and from arrows so we do this one lastly.
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if (values.middleArrow) {
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arrowData.middle = this.edgeType.getArrowData(ctx,'middle', viaNode, this.selected, this.hover, values);
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}
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// draw everything
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this.edgeType.drawLine(ctx, values, this.selected, this.hover, viaNode);
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this.drawArrows(ctx, arrowData, values);
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this.drawLabel (ctx, viaNode);
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}
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/**
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*
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* @param {CanvasRenderingContext2D} ctx
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* @param {Object} arrowData
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* @param {{toArrow: boolean, toArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), toArrowType: *, middleArrow: boolean, middleArrowScale: (number|allOptions.edges.arrows.middle.scaleFactor|{number}|Array), middleArrowType: (allOptions.edges.arrows.middle.type|{string}|string|*), fromArrow: boolean, fromArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), fromArrowType: *, arrowStrikethrough: (*|boolean|allOptions.edges.arrowStrikethrough|{boolean}), color: undefined, inheritsColor: (string|string|string|allOptions.edges.color.inherit|{string, boolean}|Array|*), opacity: *, hidden: *, length: *, shadow: *, shadowColor: *, shadowSize: *, shadowX: *, shadowY: *, dashes: (*|boolean|Array|allOptions.edges.dashes|{boolean, array}), width: *}} values
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*/
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drawArrows(ctx, arrowData, values) {
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if (values.fromArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.from);
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}
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if (values.middleArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.middle);
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}
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if (values.toArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.to);
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}
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}
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/**
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*
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* @param {CanvasRenderingContext2D} ctx
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* @param {Node} viaNode
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*/
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drawLabel(ctx, viaNode) {
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if (this.options.label !== undefined) {
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// set style
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var node1 = this.from;
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var node2 = this.to;
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if (this.labelModule.differentState(this.selected, this.hover)) {
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this.labelModule.getTextSize(ctx, this.selected, this.hover);
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}
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if (node1.id != node2.id) {
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this.labelModule.pointToSelf = false;
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var point = this.edgeType.getPoint(0.5, viaNode);
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ctx.save();
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// if the label has to be rotated:
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if (this.options.font.align !== "horizontal") {
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this.labelModule.calculateLabelSize(ctx, this.selected, this.hover, point.x, point.y);
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ctx.translate(point.x, this.labelModule.size.yLine);
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this._rotateForLabelAlignment(ctx);
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}
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// draw the label
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this.labelModule.draw(ctx, point.x, point.y, this.selected, this.hover);
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ctx.restore();
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}
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else {
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// Ignore the orientations.
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this.labelModule.pointToSelf = true;
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var x, y;
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var radius = this.options.selfReferenceSize;
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if (node1.shape.width > node1.shape.height) {
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x = node1.x + node1.shape.width * 0.5;
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y = node1.y - radius;
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}
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else {
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x = node1.x + radius;
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y = node1.y - node1.shape.height * 0.5;
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}
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point = this._pointOnCircle(x, y, radius, 0.125);
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this.labelModule.draw(ctx, point.x, point.y, this.selected, this.hover);
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}
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}
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}
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/**
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* Check if this object is overlapping with the provided object
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* @param {Object} obj an object with parameters left, top
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* @return {boolean} True if location is located on the edge
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*/
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isOverlappingWith(obj) {
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if (this.connected) {
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var distMax = 10;
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var xFrom = this.from.x;
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var yFrom = this.from.y;
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var xTo = this.to.x;
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var yTo = this.to.y;
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var xObj = obj.left;
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var yObj = obj.top;
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var dist = this.edgeType.getDistanceToEdge(xFrom, yFrom, xTo, yTo, xObj, yObj);
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return (dist < distMax);
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}
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else {
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return false
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}
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}
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/**
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* Rotates the canvas so the text is most readable
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* @param {CanvasRenderingContext2D} ctx
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* @private
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*/
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_rotateForLabelAlignment(ctx) {
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var dy = this.from.y - this.to.y;
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var dx = this.from.x - this.to.x;
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var angleInDegrees = Math.atan2(dy, dx);
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// rotate so label it is readable
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if ((angleInDegrees < -1 && dx < 0) || (angleInDegrees > 0 && dx < 0)) {
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angleInDegrees = angleInDegrees + Math.PI;
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}
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ctx.rotate(angleInDegrees);
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}
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/**
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* Get a point on a circle
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* @param {number} x
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* @param {number} y
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* @param {number} radius
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* @param {number} percentage Value between 0 (line start) and 1 (line end)
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* @return {Object} point
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* @private
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*/
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_pointOnCircle(x, y, radius, percentage) {
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var angle = percentage * 2 * Math.PI;
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return {
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x: x + radius * Math.cos(angle),
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y: y - radius * Math.sin(angle)
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}
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}
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/**
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* Sets selected state to true
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*/
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select() {
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this.selected = true;
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}
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/**
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* Sets selected state to false
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*/
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unselect() {
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this.selected = false;
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}
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/**
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* cleans all required things on delete
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* @returns {*}
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*/
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cleanup() {
|
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return this.edgeType.cleanup();
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}
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|
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/**
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* Remove edge from the list and perform necessary cleanup.
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|
*/
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remove() {
|
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this.cleanup();
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this.disconnect();
|
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delete this.body.edges[this.id];
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}
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/**
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* Check if both connecting nodes exist
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* @returns {boolean}
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*/
|
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endPointsValid() {
|
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return this.body.nodes[this.fromId] !== undefined
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&& this.body.nodes[this.toId] !== undefined;
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}
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}
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export default Edge;
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