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| /**
* Created by knut on 14-12-11.
*/
var graph = require('./graphDb');
var flow = require('./parser/flow');
var dot = require('./parser/dot');
var dagreD3 = require('dagre-d3');
/**
* Function that adds the vertices found in the graph definition to the graph to be rendered.
* @param vert Object containing the vertices.
* @param g The graph that is to be drawn.
*/
exports.addVertices = function (vert, g) {
var keys = Object.keys(vert);
var styleFromStyleArr = function(styleStr,arr){
var i;
// Create a compound style definition from the style definitions found for the node in the graph definition
for (i = 0; i < arr.length; i++) {
if (typeof arr[i] !== 'undefined') {
styleStr = styleStr + arr[i] + ';';
}
}
return styleStr;
};
// Iterate through each item in the vertice object (containing all the vertices found) in the graph definition
keys.forEach(function (id) {
var vertice = vert[id];
var verticeText;
var i;
/**
* Variable for storing the classes for the vertice
* @type {string}
*/
var classStr = '';
if(vertice.classes.length >0){
classStr = vertice.classes.join(" ");
}
/**
* Variable for storing the extracted style for the vertice
* @type {string}
*/
var style = '';
// Create a compound style definition from the style definitions found for the node in the graph definition
style = styleFromStyleArr(style, vertice.styles);
// Use vertice id as text in the box if no text is provided by the graph definition
if (typeof vertice.text === 'undefined') {
verticeText = vertice.id;
}
else {
verticeText = vertice.text;
}
var radious = 0;
var _shape = '';
// Set the shape based parameters
switch(vertice.type){
case 'round':
radious = 5;
_shape = 'rect';
break;
case 'square':
_shape = 'rect';
break;
case 'diamond':
_shape = 'question';
break;
case 'odd':
_shape = 'rect_left_inv_arrow';
break;
case 'circle':
_shape = 'circle';
break;
default:
_shape = 'rect';
}
// Add the node
g.setNode(vertice.id, {labelType: "html",shape:_shape, label: verticeText, rx: radious, ry: radious, class: classStr, style: style, id:vertice.id});
});
};
/**
* Add edges to graph based on parsed graph defninition
* @param {Object} edges The edges to add to the graph
* @param {Object} g The graph object
*/
exports.addEdges = function (edges, g) {
var cnt=0;
var aHead;
edges.forEach(function (edge) {
cnt++;
// Set link type for rendering
if(edge.type === 'arrow_open'){
aHead = 'none';
}
else{
aHead = 'normal';
}
var style = '';
if(typeof edge.style !== 'undefined'){
edge.style.forEach(function(s){
style = style + s +';';
});
}
// Add the edge to the graph
Iif (typeof edge.text === 'undefined') {
if(typeof edge.style === 'undefined'){
g.setEdge(edge.start, edge.end,{ style: "stroke: #333; stroke-width: 1.5px;fill:none", arrowheadStyle: "fill: #333", arrowhead: aHead},cnt);
}else{
g.setEdge(edge.start, edge.end, {
style: style, arrowheadStyle: "fill: #333", arrowhead: aHead
},cnt);
}
}
// Edge with text
else {
if(typeof edge.style === 'undefined'){
g.setEdge(edge.start, edge.end,{labelType: "html",style: "stroke: #333; stroke-width: 1.5px;fill:none", labelpos:'c', label: '<span style="background:#e8e8e8">'+edge.text+'</span>', arrowheadStyle: "fill: #333", arrowhead: aHead},cnt);
}else{
g.setEdge(edge.start, edge.end, {
labelType: "html",style: style, arrowheadStyle: "fill: #333", label: edge.text, arrowhead: aHead
},cnt);
}
}
});
};
/**
* Returns the all the styles from classDef statements in the graph definition.
* @returns {object} classDef styles
*/
exports.getClasses = function (text, isDot) {
var parser;
graph.clear();
if(isDot){
parser = dot.parser;
}else{
parser = flow.parser;
}
parser.yy = graph;
// Parse the graph definition
parser.parse(text);
var classDefStylesObj = {};
var classDefStyleStr = '';
var classes = graph.getClasses();
// Add default class if undefined
if(typeof classes.default === 'undefined') {
classes.default = {id:'default'};
classes.default.styles = ['fill:#eaeaea','stroke:#666','stroke-width:1.5px'];
}
return classes;
};
/**
* Draws a flowchart in the tag with id: id based on the graph definition in text.
* @param text
* @param id
*/
exports.draw = function (text, id,isDot) {
var parser;
graph.clear();
if(isDot){
parser = dot.parser;
}else{
parser = flow.parser;
}
parser.yy = graph;
// Parse the graph definition
parser.parse(text);
// Fetch the default direction, use TD if none was found
var dir;
dir = graph.getDirection();
if(typeof dir === 'undefined'){
dir='TD';
}
// Create the input mermaid.graph
var g = new dagreD3.graphlib.Graph({multigraph:true})
.setGraph({
rankdir: dir,
marginx: 20,
marginy: 20
})
.setDefaultEdgeLabel(function () {
return {};
});
// Fetch the verices/nodes and edges/links from the parsed graph definition
var vert = graph.getVertices();
var edges = graph.getEdges();
exports.addVertices(vert, g);
exports.addEdges(edges, g);
// Create the renderer
var render = new dagreD3.render();
// Add custom shape for rhombus type of boc (decision)
render.shapes().question = function (parent, bbox, node) {
var w = bbox.width,
h = bbox.height,
s = (w + h) * 0.8,
points = [
{x: s / 2, y: 0},
{x: s, y: -s / 2},
{x: s / 2, y: -s},
{x: 0, y: -s / 2}
];
var shapeSvg = parent.insert("polygon", ":first-child")
.attr("points", points.map(function (d) {
return d.x + "," + d.y;
}).join(" "))
.attr("rx", 5)
.attr("ry", 5)
.attr("transform", "translate(" + (-s / 2) + "," + (s * 2 / 4) + ")");
node.intersect = function (point) {
return dagreD3.intersect.polygon(node, points, point);
};
return shapeSvg;
};
// Add custom shape for box with inverted arrow on left side
render.shapes().rect_left_inv_arrow = function (parent, bbox, node) {
var w = bbox.width,
h = bbox.height,
points = [
{x: -h/2, y: 0},
{x: w, y: 0},
{x: w, y: -h},
{x: -h/2, y: -h},
{x: 0, y: -h/2},
];
var shapeSvg = parent.insert("polygon", ":first-child")
.attr("points", points.map(function (d) {
return d.x + "," + d.y;
}).join(" "))
.attr("transform", "translate(" + (-w / 2) + "," + (h * 2 / 4) + ")");
node.intersect = function (point) {
return dagreD3.intersect.polygon(node, points, point);
};
return shapeSvg;
};
// Add our custom arrow - an empty arrowhead
render.arrows().none = function normal(parent, id, edge, type) {
var marker = parent.append("marker")
.attr("id", id)
.attr("viewBox", "0 0 10 10")
.attr("refX", 9)
.attr("refY", 5)
.attr("markerUnits", "strokeWidth")
.attr("markerWidth", 8)
.attr("markerHeight", 6)
.attr("orient", "auto");
var path = marker.append("path")
.attr("d", "M 0 0 L 0 0 L 0 0 z");
dagreD3.util.applyStyle(path, edge[type + "Style"]);
};
// Set up an SVG group so that we can translate the final graph.
var svg = d3.select("#" + id);
svgGroup = d3.select("#" + id + " g");
// Run the renderer. This is what draws the final graph.
render(d3.select("#" + id + " g"), g);
// Center the graph
svg.attr("height", g.graph().height );
svg.attr("width", g.graph().width );
}; |