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app_vue/node_modules/svgo/plugins/cleanupEnableBackground.js

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+'use strict';
+
+const { visit } = require('../lib/xast.js');
+
+exports.type = 'visitor';
+exports.name = 'cleanupEnableBackground';
+exports.active = true;
+exports.description =
+  'remove or cleanup enable-background attribute when possible';
+
+/**
+ * Remove or cleanup enable-background attr which coincides with a width/height box.
+ *
+ * @see https://www.w3.org/TR/SVG11/filters.html#EnableBackgroundProperty
+ *
+ * @example
+ * <svg width="100" height="50" enable-background="new 0 0 100 50">
+ *             ⬇
+ * <svg width="100" height="50">
+ *
+ * @author Kir Belevich
+ *
+ * @type {import('../lib/types').Plugin<void>}
+ */
+exports.fn = (root) => {
+  const regEnableBackground =
+    /^new\s0\s0\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)$/;
+
+  let hasFilter = false;
+  visit(root, {
+    element: {
+      enter: (node) => {
+        if (node.name === 'filter') {
+          hasFilter = true;
+        }
+      },
+    },
+  });
+
+  return {
+    element: {
+      enter: (node) => {
+        if (node.attributes['enable-background'] == null) {
+          return;
+        }
+        if (hasFilter) {
+          if (
+            (node.name === 'svg' ||
+              node.name === 'mask' ||
+              node.name === 'pattern') &&
+            node.attributes.width != null &&
+            node.attributes.height != null
+          ) {
+            const match =
+              node.attributes['enable-background'].match(regEnableBackground);
+            if (
+              match != null &&
+              node.attributes.width === match[1] &&
+              node.attributes.height === match[3]
+            ) {
+              if (node.name === 'svg') {
+                delete node.attributes['enable-background'];
+              } else {
+                node.attributes['enable-background'] = 'new';
+              }
+            }
+          }
+        } else {
+          //we don't need 'enable-background' if we have no filters
+          delete node.attributes['enable-background'];
+        }
+      },
+    },
+  };
+};