Merge branch 'develop' into layout-v3

Pausing POC
Renderer for flowcharts using cytoscape, WIP
2025-10-27 17:04:10 +01:00 · 2022-09-14 10:32:25 +02:00 · 2022-09-14 10:27:30 +02:00 · 2022-09-13 17:41:43 +02:00
11 changed files with 718 additions and 20 deletions
--- a/cypress/platform/cyto.html
+++ b/cypress/platform/cyto.html
@@ -0,0 +1,92 @@
+<html>
+  <head>
+    <link href="https://fonts.googleapis.com/css?family=Montserrat&display=swap" rel="stylesheet" />
+    <link href="https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css" rel="stylesheet" />
+    <link
+      rel="stylesheet"
+      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"
+    />
+    <link
+      href="https://fonts.googleapis.com/css?family=Noto+Sans+SC&display=swap"
+      rel="stylesheet"
+    />
+    <style>
+      body {
+        /* background: rgb(221, 208, 208); */
+        /* background:#333; */
+        font-family: 'Arial';
+        /* font-size: 18px !important; */
+        width: 100%;
+        /* display: flex; */
+        /* flex-direction: column; */
+        margin-left: 20px;
+      }
+      h1 {
+        color: grey;
+      }
+      .mermaid2,
+      .mermaid3 {
+        display: none;
+      }
+      .mermaid {
+      }
+      .mermaid svg {
+        border: 1px solid purple;
+        /* font-size: 18px !important; */
+        /* fontfamily: 'courier'; */
+      }
+      #cy {
+        width: 300px;
+        height: 300px;
+        display: block;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="cy"></div>
+    <pre class="mermaid" style="width: 50%">
+flowchart TD
+id1 --> id2--> id3[I am number 3 and I<br/>am a gigantic node<br/>am a gigantic node<br/>am a gigantic node<br/>am a gigantic node<br/>am a gigantic node]--> id4--> id5 --> id1
+id5 --> id4
+id5 --> id4
+    </pre>
+    <pre class="mermaid2" style="width: 50%">
+flowchart TD
+id1 --> id2--> id3
+id2 --> id1
+    </pre>
+    <script src="./mermaid.js"></script>
+    <script>
+      mermaid.parseError = function (err, hash) {
+        // console.error('Mermaid error: ', err);
+      };
+      mermaid.initialize({
+        maxTextSize: 900000,
+        startOnLoad: true,
+        securityLevel: 'loose',
+        logLevel: 0,
+        fontFamily: 'courier',
+        flowchart: {
+          // curve: 'curveLinear',
+          useMaxWidth: true,
+          htmlLabels: false,
+          fontFamily: 'courier',
+          defaultRenderer: 'cytoscape',
+          // defaultRenderer: 'dagre-wrapper',
+        },
+      });
+      function callback() {
+        alert('It worked');
+      }
+
+      function clickByFlow(elemName) {
+        const div = document.createElement('div');
+        div.className = 'created-by-click';
+        div.style = 'padding: 20px; background: green; color: white;';
+        div.innerText = 'Clicked By Flow';
+
+        document.getElementsByTagName('body')[0].appendChild(div);
+      }
+    </script>
+  </body>
+</html>
--- a/cypress/platform/knsv.html
+++ b/cypress/platform/knsv.html
@@ -38,7 +38,7 @@
    </style>
  </head>
  <body>
-    <pre class="mermaid" style="width: 50%">
+    <pre class="mermaid2" style="width: 50%">
 flowchart LR
  classDef aPID stroke:#4e4403,fill:#fdde29,color:#4e4403,rx:5px,ry:5px;
  classDef crm stroke:#333333,fill:#DCDCDC,color:#333333,rx:5px,ry:5px;
@@ -71,10 +71,12 @@ flowchart TD
    end
    end
    </pre>
+    --> id2 --> id3(I have a long text) --> id4 --> id5 --> id1
    <pre class="mermaid" style="width: 50%">
 flowchart TD
-id
+id1
    </pre>
+    <pre id="cy" style="width: 50%"></pre>
    <pre class="mermaid2" style="width: 50%">
 flowchart LR
        a["<strong>Haiya</strong>"]===>b
@@ -99,7 +101,7 @@ flowchart TD
      class A someclass;
      class C someclass;
    </pre>
-    <pre class="mermaid" style="width: 50%">
+    <pre class="mermaid2" style="width: 50%">
   sequenceDiagram
      title: My Sequence Diagram Title
      accTitle: My Acc Sequence Diagram
@@ -109,14 +111,14 @@ flowchart TD
      John-->>Alice: Great!
      Alice-)John: See you later!
    </pre>
-    <pre class="mermaid" style="width: 50%">
+    <pre class="mermaid2" style="width: 50%">
 graph TD
    A -->|000| B
    B -->|111| C

    linkStyle 1 stroke:#ff3,stroke-width:4px,color:red;
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
  journey
      accTitle: My User Journey Diagram
      accDescr: My User Journey Diagram Description
@@ -130,10 +132,10 @@ graph TD
        Go downstairs: 5: Me
        Sit down: 5: Me
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
        info
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
 requirementDiagram
      accTitle: My req Diagram
      accDescr: My req Diagram Description
@@ -174,7 +176,7 @@ requirementDiagram
    test_req - contains -> test_req3
    test_req <- copies - test_entity2
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
 gantt
    dateFormat  YYYY-MM-DD
    title       Adding GANTT diagram functionality to mermaid
@@ -206,7 +208,7 @@ gantt
    Add gantt diagram to demo page      :20h
    Add another diagram to demo page    :48h
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
 stateDiagram
  state Active {
    Idle
@@ -234,7 +236,7 @@ stateDiagram
          end
          B ->> A: Return
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
 classDiagram
 accTitle: My class diagram
 accDescr: My class diagram Description
@@ -259,7 +261,7 @@ class Class10 {
        A->>Bob: Hola
        Bob-->A: Pasten !
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
      gitGraph
       commit id: "ZERO"
       branch develop
@@ -288,7 +290,7 @@ flowchart TD
      C -->|Two| E[iPhone]
      C -->|Three| F[fa:fa-car Car]
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
        classDiagram
          Animal "1" <|-- Duck
          Animal <|-- Fish
@@ -311,7 +313,7 @@ flowchart TD
            +run()
          }
    </pre>
-    <pre class="mermaid" style="width: 100%">
+    <pre class="mermaid2" style="width: 100%">
        erDiagram
    CAR ||--o{ NAMED-DRIVER : allows
    CAR {
@@ -343,6 +345,8 @@ flowchart TD
          useMaxWidth: true,
          htmlLabels: false,
          fontFamily: 'courier',
+          defaultRenderer: 'cytoscape',
+          // defaultRenderer: 'dagre-wrapper',
        },
      });
      function callback() {
--- a/package.json
+++ b/package.json
@@ -64,6 +64,7 @@
  },
  "dependencies": {
    "@braintree/sanitize-url": "^6.0.0",
+    "cytoscape": "^3.23.0",
    "d3": "^7.0.0",
    "dagre": "^0.8.5",
    "dagre-d3": "^0.6.4",
--- a/src/dagre-wrapper/nodes.js
+++ b/src/dagre-wrapper/nodes.js
@@ -8,8 +8,6 @@ import note from './shapes/note';
 import { parseMember } from '../diagrams/class/svgDraw';
 import { evaluate, sanitizeText as sanitize } from '../diagrams/common/common';

-const sanitizeText = (txt) => sanitize(txt, getConfig());
-
 const question = (parent, node) => {
  const { shapeSvg, bbox } = labelHelper(parent, node, undefined, true);

@@ -1064,6 +1062,7 @@ export const insertNode = (elem, node, dir) => {
  if (node.haveCallback) {
    nodeElems[node.id].attr('class', nodeElems[node.id].attr('class') + ' clickable');
  }
+  return newEl;
 };
 export const setNodeElem = (elem, node) => {
  nodeElems[node.id] = elem;
--- a/src/diagram-api/diagram-orchestration.ts
+++ b/src/diagram-api/diagram-orchestration.ts
@@ -41,9 +41,11 @@ import erStyles from '../diagrams/er/styles';
 import flowParser from '../diagrams/flowchart/parser/flow';
 import { flowDetector } from '../diagrams/flowchart/flowDetector';
 import { flowDetectorV2 } from '../diagrams/flowchart/flowDetector-v2';
+import { flowDetectorV3 } from '../diagrams/flowchart/flowDetector-v3';
 import flowDb from '../diagrams/flowchart/flowDb';
 import flowRenderer from '../diagrams/flowchart/flowRenderer';
 import flowRendererV2 from '../diagrams/flowchart/flowRenderer-v2';
+import flowRendererV3 from '../diagrams/flowchart/flowRenderer-v3';
 import flowStyles from '../diagrams/flowchart/styles';

 // @ts-ignore: TODO Fix ts errors
@@ -305,6 +307,20 @@ export const addDiagrams = () => {
    },
    flowDetectorV2
  );
+  registerDiagram(
+    'flowchart-v3',
+    {
+      parser: flowParser,
+      db: flowDb,
+      renderer: flowRendererV3,
+      styles: flowStyles,
+      init: () => {
+        flowDb.clear();
+        flowDb.setGen('gen-3');
+      },
+    },
+    flowDetectorV3
+  );
  registerDiagram(
    'gitGraph',
    { parser: gitGraphParser, db: gitGraphDb, renderer: gitGraphRenderer, styles: gitGraphStyles },
--- a/src/diagrams/flowchart/flowDetector-v2.ts
+++ b/src/diagrams/flowchart/flowDetector-v2.ts
@@ -1,8 +1,23 @@
 import type { DiagramDetector } from '../../diagram-api/detectType';
-
+import { log } from '../../diagram-api/diagramAPI';
 export const flowDetectorV2: DiagramDetector = (txt, config) => {
+  log.info('Config in flowDetector-v2 defaultRenderer: ', config?.flowchart?.defaultRenderer);
+
+  // If we have confgured to use cytoscape then we should always return false here
+  if (config?.flowchart?.defaultRenderer === 'cytoscape') {
+    log.info('flowDetector-v2 returning false');
+    return false;
+  } else {
+    log.info('flowDetector-v2 not cytoscape');
+  }
+
  // If we have confgured to use dagre-wrapper then we should return true in this function for graph code thus making it use the new flowchart diagram
  if (config?.flowchart?.defaultRenderer === 'dagre-wrapper' && txt.match(/^\s*graph/) !== null)
    return true;
+  log.info('Config in flowDetector-v2 returning', txt.match(/^\s*flowchart/) !== null);
  return txt.match(/^\s*flowchart/) !== null;
 };
+
+/*
+if (((_a = config === null || config === void 0 ? void 0 : config.flowchart) === null || _a === void 0 ? void 0 : _a.defaultRenderer) === 'dagre-wrapper1' && txt.match(/^\s*graph/) !== null)
+*/
--- a/src/diagrams/flowchart/flowDetector-v3.ts
+++ b/src/diagrams/flowchart/flowDetector-v3.ts
@@ -0,0 +1,8 @@
+import type { DiagramDetector } from '../../diagram-api/detectType';
+
+export const flowDetectorV3: DiagramDetector = (txt, config) => {
+  // If we have confgured to use dagre-wrapper then we should return true in this function for graph code thus making it use the new flowchart diagram
+  if (config?.flowchart?.defaultRenderer === 'cytoscape' && txt.match(/^\s*graph/) !== null)
+    return true;
+  return txt.match(/^\s*flowchart/) !== null;
+};
--- a/src/diagrams/flowchart/flowRenderer-v2.js
+++ b/src/diagrams/flowchart/flowRenderer-v2.js
@@ -12,7 +12,7 @@ import { interpolateToCurve, getStylesFromArray } from '../../utils';
 import { setupGraphViewbox } from '../../setupGraphViewbox';
 import addSVGAccessibilityFields from '../../accessibility';

-const conf = {};
+let conf = {};
 export const setConf = function (cnf) {
  const keys = Object.keys(cnf);
  for (let i = 0; i < keys.length; i++) {
@@ -351,6 +351,7 @@ export const getClasses = function (text, diagObj) {
 */

 export const draw = function (text, id, _version, diagObj) {
+  // const conf = config.getConfig(_version);
  log.info('Drawing flowchart');
  diagObj.db.clear();
  flowDb.setGen('gen-2');
--- a/src/diagrams/flowchart/flowRenderer-v3.js
+++ b/src/diagrams/flowchart/flowRenderer-v3.js
@@ -0,0 +1,549 @@
+import graphlib from 'graphlib';
+import { select, curveLinear, selectAll } from 'd3';
+
+import flowDb from './flowDb';
+import { getConfig } from '../../config';
+import { insertNode } from '../../dagre-wrapper/nodes.js';
+import { render } from '../../dagre-wrapper/index.js';
+import addHtmlLabel from 'dagre-d3/lib/label/add-html-label.js';
+import { log } from '../../logger';
+import common, { evaluate } from '../common/common';
+import { interpolateToCurve, getStylesFromArray } from '../../utils';
+import { setupGraphViewbox } from '../../setupGraphViewbox';
+import addSVGAccessibilityFields from '../../accessibility';
+
+import cytoscape from 'cytoscape';
+
+const conf = {};
+export const setConf = function (cnf) {
+  const keys = Object.keys(cnf);
+  for (let i = 0; i < keys.length; i++) {
+    conf[keys[i]] = cnf[keys[i]];
+  }
+};
+
+// /**
+//  * Function that adds the vertices found during parsing to the graph to be rendered.
+//  *
+//  * @param vert Object containing the vertices.
+//  * @param g The graph that is to be drawn.
+//  * @param svgId
+//  * @param root
+//  * @param doc
+//  * @param diagObj
+//  */
+export const addVertices = function (vert, cy, svgId, root, doc, diagObj) {
+  const svg = root.select(`[id="${svgId}"]`);
+  const nodes = svg.insert('g').attr('class', 'nodes');
+  const keys = Object.keys(vert);
+
+  // Iterate through each item in the vertex object (containing all the vertices found) in the graph definition
+  keys.forEach(function (id) {
+    const vertex = vert[id];
+
+    /**
+     * Variable for storing the classes for the vertex
+     *
+     * @type {string}
+     */
+    let classStr = 'default';
+    if (vertex.classes.length > 0) {
+      classStr = vertex.classes.join(' ');
+    }
+
+    const styles = getStylesFromArray(vertex.styles);
+
+    // Use vertex id as text in the box if no text is provided by the graph definition
+    let vertexText = vertex.text !== undefined ? vertex.text : vertex.id;
+
+    // We create a SVG label, either by delegating to addHtmlLabel or manually
+    let vertexNode;
+    if (evaluate(getConfig().flowchart.htmlLabels)) {
+      // TODO: addHtmlLabel accepts a labelStyle. Do we possibly have that?
+      const node = {
+        label: vertexText.replace(
+          /fa[lrsb]?:fa-[\w-]+/g,
+          (s) => `<i class='${s.replace(':', ' ')}'></i>`
+        ),
+      };
+      vertexNode = addHtmlLabel(svg, node).node();
+      vertexNode.parentNode.removeChild(vertexNode);
+    } else {
+      const svgLabel = doc.createElementNS('http://www.w3.org/2000/svg', 'text');
+      svgLabel.setAttribute('style', styles.labelStyle.replace('color:', 'fill:'));
+
+      const rows = vertexText.split(common.lineBreakRegex);
+
+      for (let j = 0; j < rows.length; j++) {
+        const tspan = doc.createElementNS('http://www.w3.org/2000/svg', 'tspan');
+        tspan.setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:space', 'preserve');
+        tspan.setAttribute('dy', '1em');
+        tspan.setAttribute('x', '1');
+        tspan.textContent = rows[j];
+        svgLabel.appendChild(tspan);
+      }
+      vertexNode = svgLabel;
+    }
+
+    let radious = 0;
+    let _shape = '';
+    // Set the shape based parameters
+    switch (vertex.type) {
+      case 'round':
+        radious = 5;
+        _shape = 'rect';
+        break;
+      case 'square':
+        _shape = 'rect';
+        break;
+      case 'diamond':
+        _shape = 'question';
+        break;
+      case 'hexagon':
+        _shape = 'hexagon';
+        break;
+      case 'odd':
+        _shape = 'rect_left_inv_arrow';
+        break;
+      case 'lean_right':
+        _shape = 'lean_right';
+        break;
+      case 'lean_left':
+        _shape = 'lean_left';
+        break;
+      case 'trapezoid':
+        _shape = 'trapezoid';
+        break;
+      case 'inv_trapezoid':
+        _shape = 'inv_trapezoid';
+        break;
+      case 'odd_right':
+        _shape = 'rect_left_inv_arrow';
+        break;
+      case 'circle':
+        _shape = 'circle';
+        break;
+      case 'ellipse':
+        _shape = 'ellipse';
+        break;
+      case 'stadium':
+        _shape = 'stadium';
+        break;
+      case 'subroutine':
+        _shape = 'subroutine';
+        break;
+      case 'cylinder':
+        _shape = 'cylinder';
+        break;
+      case 'group':
+        _shape = 'rect';
+        break;
+      case 'doublecircle':
+        _shape = 'doublecircle';
+        break;
+      default:
+        _shape = 'rect';
+    }
+    // // Add the node
+    const node = {
+      labelStyle: styles.labelStyle,
+      shape: _shape,
+      labelText: vertexText,
+      rx: radious,
+      ry: radious,
+      class: classStr,
+      style: styles.style,
+      id: vertex.id,
+      link: vertex.link,
+      linkTarget: vertex.linkTarget,
+      tooltip: diagObj.db.getTooltip(vertex.id) || '',
+      domId: diagObj.db.lookUpDomId(vertex.id),
+      haveCallback: vertex.haveCallback,
+      width: vertex.type === 'group' ? 500 : undefined,
+      dir: vertex.dir,
+      type: vertex.type,
+      props: vertex.props,
+      padding: getConfig().flowchart.padding,
+    };
+    const nodeEl = insertNode(nodes, node, vertex.dir);
+    const boundingBox = nodeEl.node().getBBox();
+    cy.add({
+      group: 'nodes',
+      data: {
+        id: vertex.id,
+        labelStyle: styles.labelStyle,
+        shape: _shape,
+        labelText: vertexText,
+        rx: radious,
+        ry: radious,
+        class: classStr,
+        style: styles.style,
+        link: vertex.link,
+        linkTarget: vertex.linkTarget,
+        tooltip: diagObj.db.getTooltip(vertex.id) || '',
+        domId: diagObj.db.lookUpDomId(vertex.id),
+        haveCallback: vertex.haveCallback,
+        width: vertex.type === 'group' ? 500 : undefined,
+        dir: vertex.dir,
+        type: vertex.type,
+        props: vertex.props,
+        padding: getConfig().flowchart.padding,
+        boundingBox,
+        el: nodeEl,
+      },
+    });
+
+    log.trace('setNode', {
+      labelStyle: styles.labelStyle,
+      shape: _shape,
+      labelText: vertexText,
+      rx: radious,
+      ry: radious,
+      class: classStr,
+      style: styles.style,
+      id: vertex.id,
+      domId: diagObj.db.lookUpDomId(vertex.id),
+      width: vertex.type === 'group' ? 500 : undefined,
+      type: vertex.type,
+      dir: vertex.dir,
+      props: vertex.props,
+      padding: getConfig().flowchart.padding,
+    });
+  });
+};
+
+/**
+ * Add edges to graph based on parsed graph definition
+ *
+ * @param {object} edges The edges to add to the graph
+ * @param {object} g The graph object
+ * @param cy
+ * @param diagObj
+ */
+export const addEdges = function (edges, cy, diagObj) {
+  // log.info('abc78 edges = ', edges);
+  let cnt = 0;
+  let linkIdCnt = {};
+
+  let defaultStyle;
+  let defaultLabelStyle;
+
+  if (typeof edges.defaultStyle !== 'undefined') {
+    const defaultStyles = getStylesFromArray(edges.defaultStyle);
+    defaultStyle = defaultStyles.style;
+    defaultLabelStyle = defaultStyles.labelStyle;
+  }
+
+  edges.forEach(function (edge) {
+    cnt++;
+
+    // Identify Link
+    var linkIdBase = 'L-' + edge.start + '-' + edge.end;
+    // count the links from+to the same node to give unique id
+    if (typeof linkIdCnt[linkIdBase] === 'undefined') {
+      linkIdCnt[linkIdBase] = 0;
+      log.info('abc78 new entry', linkIdBase, linkIdCnt[linkIdBase]);
+    } else {
+      linkIdCnt[linkIdBase]++;
+      log.info('abc78 new entry', linkIdBase, linkIdCnt[linkIdBase]);
+    }
+    let linkId = linkIdBase + '-' + linkIdCnt[linkIdBase];
+    log.info('abc78 new link id to be used is', linkIdBase, linkId, linkIdCnt[linkIdBase]);
+    var linkNameStart = 'LS-' + edge.start;
+    var linkNameEnd = 'LE-' + edge.end;
+
+    const edgeData = { style: '', labelStyle: '' };
+    edgeData.minlen = edge.length || 1;
+    //edgeData.id = 'id' + cnt;
+
+    // Set link type for rendering
+    if (edge.type === 'arrow_open') {
+      edgeData.arrowhead = 'none';
+    } else {
+      edgeData.arrowhead = 'normal';
+    }
+
+    // Check of arrow types, placed here in order not to break old rendering
+    edgeData.arrowTypeStart = 'arrow_open';
+    edgeData.arrowTypeEnd = 'arrow_open';
+
+    /* eslint-disable no-fallthrough */
+    switch (edge.type) {
+      case 'double_arrow_cross':
+        edgeData.arrowTypeStart = 'arrow_cross';
+      case 'arrow_cross':
+        edgeData.arrowTypeEnd = 'arrow_cross';
+        break;
+      case 'double_arrow_point':
+        edgeData.arrowTypeStart = 'arrow_point';
+      case 'arrow_point':
+        edgeData.arrowTypeEnd = 'arrow_point';
+        break;
+      case 'double_arrow_circle':
+        edgeData.arrowTypeStart = 'arrow_circle';
+      case 'arrow_circle':
+        edgeData.arrowTypeEnd = 'arrow_circle';
+        break;
+    }
+
+    let style = '';
+    let labelStyle = '';
+
+    switch (edge.stroke) {
+      case 'normal':
+        style = 'fill:none;';
+        if (typeof defaultStyle !== 'undefined') {
+          style = defaultStyle;
+        }
+        if (typeof defaultLabelStyle !== 'undefined') {
+          labelStyle = defaultLabelStyle;
+        }
+        edgeData.thickness = 'normal';
+        edgeData.pattern = 'solid';
+        break;
+      case 'dotted':
+        edgeData.thickness = 'normal';
+        edgeData.pattern = 'dotted';
+        edgeData.style = 'fill:none;stroke-width:2px;stroke-dasharray:3;';
+        break;
+      case 'thick':
+        edgeData.thickness = 'thick';
+        edgeData.pattern = 'solid';
+        edgeData.style = 'stroke-width: 3.5px;fill:none;';
+        break;
+    }
+    if (typeof edge.style !== 'undefined') {
+      const styles = getStylesFromArray(edge.style);
+      style = styles.style;
+      labelStyle = styles.labelStyle;
+    }
+
+    edgeData.style = edgeData.style += style;
+    edgeData.labelStyle = edgeData.labelStyle += labelStyle;
+
+    if (typeof edge.interpolate !== 'undefined') {
+      edgeData.curve = interpolateToCurve(edge.interpolate, curveLinear);
+    } else if (typeof edges.defaultInterpolate !== 'undefined') {
+      edgeData.curve = interpolateToCurve(edges.defaultInterpolate, curveLinear);
+    } else {
+      edgeData.curve = interpolateToCurve(conf.curve, curveLinear);
+    }
+
+    if (typeof edge.text === 'undefined') {
+      if (typeof edge.style !== 'undefined') {
+        edgeData.arrowheadStyle = 'fill: #333';
+      }
+    } else {
+      edgeData.arrowheadStyle = 'fill: #333';
+      edgeData.labelpos = 'c';
+    }
+
+    edgeData.labelType = 'text';
+    edgeData.label = edge.text.replace(common.lineBreakRegex, '\n');
+
+    if (typeof edge.style === 'undefined') {
+      edgeData.style = edgeData.style || 'stroke: #333; stroke-width: 1.5px;fill:none;';
+    }
+
+    edgeData.labelStyle = edgeData.labelStyle.replace('color:', 'fill:');
+
+    edgeData.id = linkId;
+    edgeData.classes = 'flowchart-link ' + linkNameStart + ' ' + linkNameEnd;
+
+    // Add the edge to the graph
+    cy.add({ group: 'edges', data: { source: edge.start, target: edge.end, edgeData, id: cnt } });
+  });
+};
+
+/**
+ * Returns the all the styles from classDef statements in the graph definition.
+ *
+ * @param text
+ * @param diagObj
+ * @returns {object} ClassDef styles
+ */
+export const getClasses = function (text, diagObj) {
+  log.info('Extracting classes');
+  diagObj.db.clear();
+  try {
+    // Parse the graph definition
+    diagObj.parse(text);
+    return diagObj.db.getClasses();
+  } catch (e) {
+    return;
+  }
+};
+
+/**
+ * Draws a flowchart in the tag with id: id based on the graph definition in text.
+ *
+ * @param text
+ * @param id
+ */
+
+export const draw = function (text, id, _version, diagObj) {
+  return new Promise(function (resolve, reject) {
+    const cy = cytoscape({
+      // styleEnabled: false,
+      // animate: false,
+      // ready: function () {
+      //   log.info('Ready', this);
+      // },
+      container: document.getElementById('cy'), // container to render in
+
+      elements: [
+        // list of graph elements to start with
+        // { // node a
+        //   data: { id: 'a' }
+        // },
+        // { // node b
+        //   data: { id: 'b' }
+        // },
+        // { // edge ab
+        //   data: { id: 'ab', source: 'a', target: 'b' }
+        // }
+      ],
+
+      style: [
+        // the stylesheet for the graph
+        {
+          selector: 'node',
+          style: {
+            'background-color': '#666',
+            label: 'data(labelText)',
+          },
+        },
+
+        {
+          selector: 'edge',
+          style: {
+            width: 3,
+            'line-color': '#ccc',
+            'target-arrow-color': '#ccc',
+            'target-arrow-shape': 'triangle',
+            'curve-style': 'bezier',
+            label: 'data(id)',
+          },
+        },
+      ],
+
+      layout: {
+        name: 'breadthfirst',
+        rows: 1,
+      },
+    });
+    log.info('Drawing flowchart using v3 renderer');
+    // Fetch the default direction, use TD if none was found
+    let dir = diagObj.db.getDirection();
+    if (typeof dir === 'undefined') {
+      dir = 'TD';
+    }
+
+    const { securityLevel, flowchart: conf } = getConfig();
+    // const nodeSpacing = conf.nodeSpacing || 50;
+    // const rankSpacing = conf.rankSpacing || 50;
+
+    // Handle root and document for when rendering in sandbox mode
+    let sandboxElement;
+    if (securityLevel === 'sandbox') {
+      sandboxElement = select('#i' + id);
+    }
+    const root =
+      securityLevel === 'sandbox'
+        ? select(sandboxElement.nodes()[0].contentDocument.body)
+        : select('body');
+    const doc = securityLevel === 'sandbox' ? sandboxElement.nodes()[0].contentDocument : document;
+
+    const svg = root.select(`[id="${id}"]`);
+    const edgesEl = svg.insert('g').attr('class', 'edges edgePath');
+
+    // Fetch the vertices/nodes and edges/links from the parsed graph definition
+    const vert = diagObj.db.getVertices();
+    addVertices(vert, cy, id, root, doc, diagObj);
+    // c.style();
+    // Make cytoscape care about the dimensisions of the nodes
+    cy.nodes().forEach(function (n) {
+      n.layoutDimensions = () => {
+        const boundingBox = n.data().boundingBox;
+        return { w: boundingBox.width, h: boundingBox.height };
+      };
+    });
+
+    const edges = diagObj.db.getEdges();
+    addEdges(edges, cy, diagObj);
+
+    cy.layout({
+      // name: 'grid',
+      // name: 'circle',
+      name: 'cose',
+      // name: 'breadthfirst',
+      headless: true,
+      styleEnabled: false,
+      animate: false,
+    }).run();
+    log.info('Positions', cy.nodes().positions());
+    window.cy = cy;
+    cy.ready((e) => {
+      log.info('Ready', e);
+      setTimeout(() => {
+        cy.nodes().map((node, id) => {
+          const data = node.data();
+          log.info('Position: (', node.position().x, ', ', node.position().y, ')', data);
+          data.el.attr('transform', `translate(${node.position().x}, ${node.position().y})`);
+          // document
+          //   .querySelector(`[id="${data.domId}"]`)
+          //   .setAttribute('transform', `translate(${node.position().x}, ${node.position().y})`);
+          log.info('Id = ', data.domId, svg.select(`[id="${data.domId}"]`), data.el.node());
+        });
+
+        cy.edges().map((edge, id) => {
+          const data = edge.data();
+          if (edge[0]._private.bodyBounds) {
+            const bounds = edge[0]._private.rscratch;
+            log.info(
+              id,
+              // 'x:',
+              // edge.controlPoints(),
+              // 'y:',
+              edge[0]._private.rscratch
+              // 'w:',
+              // edge.boundingbox().w,
+              // 'h:',
+              // edge.boundingbox().h,
+              // edge.midPoint()
+            );
+            // data.el.attr('transform', `translate(${node.position().x}, ${node.position().y})`);
+            // edgesEl
+            //   .insert('line')
+            //   .attr('x1', bounds.startX)
+            //   .attr('y1', bounds.startY)
+            //   .attr('x2', bounds.endX)
+            //   .attr('y2', bounds.endY)
+            //   .attr('class', 'path');
+            edgesEl
+              .insert('path')
+              // Todo use regular line function
+              .attr(
+                'd',
+                `M ${bounds.startX},${bounds.startY} L ${bounds.midX},${bounds.midY} L${bounds.endX},${bounds.endY} `
+              )
+              .attr('class', 'path')
+              .attr('fill', 'none');
+          }
+        });
+
+        log.info(cy.json());
+        setupGraphViewbox({}, svg, conf.diagramPadding, conf.useMaxWidth);
+        resolve();
+      }, 500);
+    });
+  });
+};
+
+export default {
+  // setConf,
+  // addVertices,
+  // addEdges,
+  getClasses,
+  draw,
+};
--- a/src/mermaidAPI.ts
+++ b/src/mermaidAPI.ts
@@ -118,12 +118,12 @@ export const decodeEntities = function (text: string): string {
 *   element will be removed when rendering is completed.
 * @returns {void}
 */
-const render = function (
+const render = async function (
  id: string,
  text: string,
  cb: (svgCode: string, bindFunctions?: (element: Element) => void) => void,
  container?: Element
-): void {
+): Promise<void> {
  configApi.reset();
  text = text.replace(/\r\n?/g, '\n'); // parser problems on CRLF ignore all CR and leave LF;;
  const graphInit = utils.detectInit(text);
@@ -299,7 +299,7 @@ const render = function (
  svg.insertBefore(style1, firstChild);

  try {
-    diag.renderer.draw(text, id, pkg.version, diag);
+    await diag.renderer.draw(text, id, pkg.version, diag);
  } catch (e) {
    errorRenderer.draw(id, pkg.version);
    throw e;
--- a/yarn.lock
+++ b/yarn.lock
@@ -4710,6 +4710,14 @@ cypress@9.7.0:
    untildify "^4.0.0"
    yauzl "^2.10.0"

+cytoscape@^3.23.0:
+  version "3.23.0"
+  resolved "https://registry.yarnpkg.com/cytoscape/-/cytoscape-3.23.0.tgz#054ee05a6d0aa3b4f139382bbf2f4e5226df3c6d"
+  integrity sha512-gRZqJj/1kiAVPkrVFvz/GccxsXhF3Qwpptl32gKKypO4IlqnKBjTOu+HbXtEggSGzC5KCaHp3/F7GgENrtsFkA==
+  dependencies:
+    heap "^0.2.6"
+    lodash "^4.17.21"
+
 "d3-array@2 - 3", "d3-array@2.10.0 - 3", "d3-array@2.5.0 - 3", d3-array@3:
  version "3.1.1"
  resolved "https://registry.yarnpkg.com/d3-array/-/d3-array-3.1.1.tgz#7797eb53ead6b9083c75a45a681e93fc41bc468c"
@@ -6775,6 +6783,11 @@ he@^1.1.0:
  resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
  integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==

+heap@^0.2.6:
+  version "0.2.7"
+  resolved "https://registry.yarnpkg.com/heap/-/heap-0.2.7.tgz#1e6adf711d3f27ce35a81fe3b7bd576c2260a8fc"
+  integrity sha512-2bsegYkkHO+h/9MGbn6KWcE45cHZgPANo5LXF7EvWdT0yT2EguSVO1nDgU5c8+ZOPwp2vMNa7YFsJhVcDR9Sdg==
+
 highlight.js@^10.5.0:
  version "10.7.3"
  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-10.7.3.tgz#697272e3991356e40c3cac566a74eef681756531"
Author	SHA1	Message	Date
Knut Sveidqvist	25c9e499b3	Merge branch 'develop' into layout-v3	2022-09-14 10:32:25 +02:00
Knut Sveidqvist	be5d9bd623	Pausing POC	2022-09-14 10:27:30 +02:00
Knut Sveidqvist	d851cc63bf	Renderer for flowcharts using cytoscape, WIP	2022-09-13 17:41:43 +02:00