Get rid of call to findReferences.

lib/builtin.js

@@ -38,7 +38,6 @@ import * as removeEditorsNSData from '../plugins/removeEditorsNSData.js';
 import * as removeElementsByAttr from '../plugins/removeElementsByAttr.js';
 import * as removeEmptyAttrs from '../plugins/removeEmptyAttrs.js';
 import * as removeEmptyContainers from '../plugins/removeEmptyContainers.js';
-import * as removeEmptyText from '../plugins/removeEmptyText.js';
 import * as removeHiddenElems from '../plugins/removeHiddenElems.js';
 import * as removeMetadata from '../plugins/removeMetadata.js';
 import * as removeNonInheritableGroupAttrs from '../plugins/removeNonInheritableGroupAttrs.js';
@@ -103,7 +102,6 @@ export const builtin = Object.freeze([
   removeElementsByAttr,
   removeEmptyAttrs,
   removeEmptyContainers,
-  removeEmptyText,
   removeHiddenElems,
   removeMetadata,
   removeNonInheritableGroupAttrs,

plugins/plugins-types.d.ts

@@ -100,11 +100,6 @@ type DefaultPlugins = {
   };
   removeEmptyAttrs: void;
   removeEmptyContainers: void;
-  removeEmptyText: {
-    text?: boolean;
-    tspan?: boolean;
-    tref?: boolean;
-  };
   removeHiddenElems: {
     isHidden?: boolean;
     displayNone?: boolean;

plugins/removeEmptyContainers.js

@@ -1,5 +1,5 @@
+import { getHrefId } from '../lib/svgo/tools.js';
 import { detachNodeFromParent } from '../lib/xast.js';
-import { findReferences } from '../lib/svgo/tools.js';
 
 export const name = 'removeEmptyContainers';
 export const description = 'removes empty container elements';
@@ -35,19 +35,17 @@ export const fn = () => {
 
   return {
     element: {
-      enter: (node) => {
-        if (node.name === 'use') {
+      enter: (element) => {
+        if (element.name === 'use') {
           // Record uses so those referencing empty containers can be removed.
-          for (const [name, value] of Object.entries(node.attributes)) {
-            const ids = findReferences(name, value);
-            for (const id of ids) {
-              let references = usesById.get(id);
-              if (references === undefined) {
-                references = [];
-                usesById.set(id, references);
-              }
-              references.push(node);
+          const id = getHrefId(element);
+          if (id) {
+            let references = usesById.get(id);
+            if (references === undefined) {
+              references = [];
+              usesById.set(id, references);
             }
+            references.push(element);
           }
         }
       },