Remove clone css style code

src/utils.js

@@ -47,85 +47,6 @@ export const detectType = function (text) {
   return 'graph'
 }
 
-/**
- * Copies all relevant CSS content into the graph SVG.
- * This allows the SVG to be copied as is while keeping class based styling
- * @param {element} svg The root element of the SVG
- * @param {object} Hash table of class definitions from the graph definition
- */
-export const cloneCssStyles = function (svg, classes) {
-  let usedStyles = ''
-  const sheets = document.styleSheets
-  let rule
-  for (let i = 0; i < sheets.length; i++) {
-    // Avoid multiple inclusion on pages with multiple graphs
-    if (sheets[i].title !== 'mermaid-svg-internal-css') {
-      try {
-        const rules = sheets[i].cssRules
-        if (rules !== null) {
-          for (let j = 0; j < rules.length; j++) {
-            rule = rules[j]
-            if (typeof (rule.style) !== 'undefined') {
-              const elems = svg.querySelectorAll(rule.selectorText)
-              if (elems.length > 0) {
-                usedStyles += rule.selectorText + ' { ' + rule.style.cssText + '}\n'
-              }
-            }
-          }
-        }
-      } catch (err) {
-        if (typeof (rule) !== 'undefined') {
-          logger.warn('Invalid CSS selector "' + rule.selectorText + '"', err)
-        }
-      }
-    }
-  }
-
-  let defaultStyles = ''
-  let embeddedStyles = ''
-  for (const className in classes) {
-    if (classes.hasOwnProperty(className) && typeof (className) !== 'undefined') {
-      if (className === 'default') {
-        if (classes.default.styles instanceof Array) {
-          defaultStyles += '#' + svg.id.trim() + ' .node' + '>rect { ' + classes[className].styles.join('; ') + '; }\n'
-        }
-        if (classes.default.nodeLabelStyles instanceof Array) {
-          defaultStyles += '#' + svg.id.trim() + ' .node text ' + ' { ' + classes[className].nodeLabelStyles.join('; ') + '; }\n'
-        }
-        if (classes.default.edgeLabelStyles instanceof Array) {
-          defaultStyles += '#' + svg.id.trim() + ' .edgeLabel text ' + ' { ' + classes[className].edgeLabelStyles.join('; ') + '; }\n'
-        }
-        if (classes.default.clusterStyles instanceof Array) {
-          defaultStyles += '#' + svg.id.trim() + ' .cluster rect ' + ' { ' + classes[className].clusterStyles.join('; ') + '; }\n'
-        }
-      } else {
-        if (classes[className].styles instanceof Array) {
-          embeddedStyles += '#' + svg.id.trim() + ' .' + className + '>rect, .' + className + '>polygon, .' + className + '>circle, .' + className + '>ellipse { ' + classes[className].styles.join('; ') + '; }\n'
-        }
-      }
-    }
-  }
-
-  if (usedStyles !== '' || defaultStyles !== '' || embeddedStyles !== '') {
-    const s = document.createElement('style')
-    s.setAttribute('type', 'text/css')
-    s.setAttribute('title', 'mermaid-svg-internal-css')
-    s.innerHTML = '/* <![CDATA[ */\n'
-    // Make this CSS local to this SVG
-    if (defaultStyles !== '') {
-      s.innerHTML += defaultStyles
-    }
-    if (usedStyles !== '') {
-      s.innerHTML += usedStyles
-    }
-    if (embeddedStyles !== '') {
-      s.innerHTML += embeddedStyles
-    }
-    s.innerHTML += '/* ]]> */\n'
-    svg.insertBefore(s, svg.firstChild)
-  }
-}
-
 /**
  * @function isSubstringInArray
  * Detects whether a substring in present in a given array
@@ -142,6 +63,5 @@ export const isSubstringInArray = function (str, arr) {
 
 export default {
   detectType,
-  cloneCssStyles,
   isSubstringInArray
 }