Fixed styling for lines for ELK flowchart

cypress/integration/rendering/flowchart-elk.spec.js

@@ -844,3 +844,43 @@ end
     });
   });
 });
+
+describe('Title and arrow styling #4813', () => {
+
+  it('should render a flowchart with title', () => {
+    const titleString = 'Test Title';
+    renderGraph(
+      `---
+      title: ${titleString}
+      ---
+      flowchart LR
+      A-->B`,
+      { flowchart: { defaultRenderer: "elk" } }
+    );
+    cy.get('svg').should((svg) => {
+
+      const title = svg[0].querySelector('text');
+      expect(title.textContent).to.contain(titleString);
+    });
+  });
+
+  it('Render with stylized arrows', () => {
+    const titleString = 'Test Title';
+    renderGraph(
+      `
+      flowchart LR
+      A-->B
+      B-.-oC
+      C==xD
+      D ~~~ A`,
+      { flowchart: { defaultRenderer: "elk" } }
+    );
+    cy.get('svg').should((svg) => {
+      const edges = svg[0].querySelectorAll('.edges path');
+      expect(edges[0]).to.have.attr('pattern', 'solid');
+      expect(edges[1]).to.have.attr('pattern', 'dotted');
+      expect(edges[2]).to.have.css('stroke-width', '3.5px');
+      expect(edges[3]).to.have.css('stroke-width', '1.5px');
+    });
+  });
+})

packages/mermaid/src/diagrams/flowchart/elk/flowRenderer-elk.js

@@ -4,6 +4,7 @@ import insertMarkers from '../../../dagre-wrapper/markers.js';
 import { insertEdgeLabel } from '../../../dagre-wrapper/edges.js';
 import { findCommonAncestor } from './render-utils.js';
 import { labelHelper } from '../../../dagre-wrapper/shapes/util.js';
+import utils from '../../../utils.js';
 import { getConfig } from '../../../config.js';
 import { log } from '../../../logger.js';
 import { setupGraphViewbox } from '../../../setupGraphViewbox.js';
@@ -756,6 +757,12 @@ const insertEdge = function (edgesEl, edge, edgeData, diagObj, parentLookupDb, i
     .attr('d', curve(points))
     .attr('class', 'path ' + edgeData.classes)
     .attr('fill', 'none');
+  Object.entries(edgeData).forEach(([key, value]) => {
+    if (key !== 'classes'){
+      edgePath.attr(key, value);
+    }
+  });
+  log.info(edgePath);
   const edgeG = edgesEl.insert('g').attr('class', 'edgeLabel');
   const edgeWithLabel = select(edgeG.node().appendChild(edge.labelEl));
   const box = edgeWithLabel.node().firstChild.getBoundingClientRect();
@@ -805,6 +812,7 @@ const insertChildren = (nodeArray, parentLookupDb) => {
 export const draw = async function (text, id, _version, diagObj) {
   // Add temporary render element
   diagObj.db.clear();
+  const { securityLevel, flowchart: conf } = getConfig();
   nodeDb = {};
   portPos = {};
   diagObj.db.setGen('gen-2');
@@ -816,8 +824,7 @@ export const draw = async function (text, id, _version, diagObj) {
     id: 'root',
     layoutOptions: {
       'elk.hierarchyHandling': 'INCLUDE_CHILDREN',
-      'org.eclipse.elk.padding': '[top=100, left=100, bottom=110, right=110]',
+      'elk.layered.spacing.edgeNodeBetweenLayers': conf?.nodeSpacing ? `${conf.nodeSpacing}` : '30',
-      'elk.layered.spacing.edgeNodeBetweenLayers': '30',
       // 'elk.layered.mergeEdges': 'true',
       'elk.direction': 'DOWN',
       // 'elk.ports.sameLayerEdges': true,
@@ -845,7 +852,6 @@ export const draw = async function (text, id, _version, diagObj) {
       graph.layoutOptions['elk.direction'] = 'LEFT';
       break;
   }
-  const { securityLevel, flowchart: conf } = getConfig();
 
   // Find the root dom node to ne used in rendering
   // Handle root and document for when rendering in sandbox mode
@@ -861,6 +867,7 @@ export const draw = async function (text, id, _version, diagObj) {
 
   const svg = root.select(`[id="${id}"]`);
 
+  utils.insertTitle(svg, 'flowchartTitleText', conf.titleTopMargin, diagObj.db.getDiagramTitle());
   // Define the supported markers for the diagram
   const markers = ['point', 'circle', 'cross'];
 

packages/mermaid/src/diagrams/flowchart/elk/flowchart-elk-definition.ts

@@ -1,7 +1,7 @@
 // @ts-ignore: JISON typing missing
 import parser from '../parser/flow.jison';
 
-import * as db from '../flowDb.js';
+import db from '../flowDb.js';
 import renderer from './flowRenderer-elk.js';
 import styles from './styles.js';