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backend/node_modules/svgo/plugins/convertStyleToAttrs.js

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+'use strict';
+
+const { attrsGroups } = require('./_collections');
+
+exports.name = 'convertStyleToAttrs';
+exports.description = 'converts style to attributes';
+
+/**
+ * @type {(...args: string[]) => string}
+ */
+const g = (...args) => {
+  return '(?:' + args.join('|') + ')';
+};
+
+const stylingProps = attrsGroups.presentation;
+const rEscape = '\\\\(?:[0-9a-f]{1,6}\\s?|\\r\\n|.)'; // Like \" or \2051. Code points consume one space.
+const rAttr = '\\s*(' + g('[^:;\\\\]', rEscape) + '*?)\\s*'; // attribute name like ‘fill’
+const rSingleQuotes = "'(?:[^'\\n\\r\\\\]|" + rEscape + ")*?(?:'|$)"; // string in single quotes: 'smth'
+const rQuotes = '"(?:[^"\\n\\r\\\\]|' + rEscape + ')*?(?:"|$)'; // string in double quotes: "smth"
+const rQuotedString = new RegExp('^' + g(rSingleQuotes, rQuotes) + '$');
+// Parentheses, E.g.: url(data:image/png;base64,iVBO...).
+// ':' and ';' inside of it should be treated as is. (Just like in strings.)
+const rParenthesis =
+  '\\(' + g('[^\'"()\\\\]+', rEscape, rSingleQuotes, rQuotes) + '*?' + '\\)';
+// The value. It can have strings and parentheses (see above). Fallbacks to anything in case of unexpected input.
+const rValue =
+  '\\s*(' +
+  g(
+    '[^!\'"();\\\\]+?',
+    rEscape,
+    rSingleQuotes,
+    rQuotes,
+    rParenthesis,
+    '[^;]*?',
+  ) +
+  '*?' +
+  ')';
+// End of declaration. Spaces outside of capturing groups help to do natural trimming.
+const rDeclEnd = '\\s*(?:;\\s*|$)';
+// Important rule
+const rImportant = '(\\s*!important(?![-(\\w]))?';
+// Final RegExp to parse CSS declarations.
+const regDeclarationBlock = new RegExp(
+  rAttr + ':' + rValue + rImportant + rDeclEnd,
+  'ig',
+);
+// Comments expression. Honors escape sequences and strings.
+const regStripComments = new RegExp(
+  g(rEscape, rSingleQuotes, rQuotes, '/\\*[^]*?\\*/'),
+  'ig',
+);
+
+/**
+ * Convert style in attributes. Cleanups comments and illegal declarations (without colon) as a side effect.
+ *
+ * @example
+ * <g style="fill:#000; color: #fff;">
+ *             ⬇
+ * <g fill="#000" color="#fff">
+ *
+ * @example
+ * <g style="fill:#000; color: #fff; -webkit-blah: blah">
+ *             ⬇
+ * <g fill="#000" color="#fff" style="-webkit-blah: blah">
+ *
+ * @author Kir Belevich
+ *
+ * @type {import('./plugins-types').Plugin<'convertStyleToAttrs'>}
+ */
+exports.fn = (_root, params) => {
+  const { keepImportant = false } = params;
+  return {
+    element: {
+      enter: (node) => {
+        if (node.attributes.style != null) {
+          // ['opacity: 1', 'color: #000']
+          let styles = [];
+          /**
+           * @type {Record<string, string>}
+           */
+          const newAttributes = {};
+
+          // Strip CSS comments preserving escape sequences and strings.
+          const styleValue = node.attributes.style.replace(
+            regStripComments,
+            (match) => {
+              return match[0] == '/'
+                ? ''
+                : match[0] == '\\' && /[-g-z]/i.test(match[1])
+                  ? match[1]
+                  : match;
+            },
+          );
+
+          regDeclarationBlock.lastIndex = 0;
+          for (var rule; (rule = regDeclarationBlock.exec(styleValue)); ) {
+            if (!keepImportant || !rule[3]) {
+              styles.push([rule[1], rule[2]]);
+            }
+          }
+
+          if (styles.length) {
+            styles = styles.filter(function (style) {
+              if (style[0]) {
+                var prop = style[0].toLowerCase(),
+                  val = style[1];
+
+                if (rQuotedString.test(val)) {
+                  val = val.slice(1, -1);
+                }
+
+                if (stylingProps.has(prop)) {
+                  newAttributes[prop] = val;
+
+                  return false;
+                }
+              }
+
+              return true;
+            });
+
+            Object.assign(node.attributes, newAttributes);
+
+            if (styles.length) {
+              node.attributes.style = styles
+                .map((declaration) => declaration.join(':'))
+                .join(';');
+            } else {
+              delete node.attributes.style;
+            }
+          }
+        }
+      },
+    },
+  };
+};