Move orphanizeString() into text-utils module

Another small step toward the goal of reducing dependency
on `µb`.

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1664

text-iterators module has been renamed text-utils to better
reflect its content.

platform/browser/main.js

@@ -28,7 +28,7 @@ import './lib/punycode.js';
 
 import globals from './js/globals.js';
 import { FilteringContext } from './js/filtering-context.js';
-import { LineIterator } from './js/text-iterators.js';
+import { LineIterator } from './js/text-utils.js';
 import { StaticFilteringParser } from './js/static-filtering-parser.js';
 import { staticNetFilteringEngine } from './js/static-net-filtering.js';
 

platform/nodejs/main.js

@@ -31,7 +31,7 @@ import './lib/publicsuffixlist/publicsuffixlist.js';
 import globals from './js/globals.js';
 import snfe from './js/static-net-filtering.js';
 import { FilteringContext } from './js/filtering-context.js';
-import { LineIterator } from './js/text-iterators.js';
+import { LineIterator } from './js/text-utils.js';
 import { StaticFilteringParser } from './js/static-filtering-parser.js';
 
 import {

src/js/benchmarks.js

@@ -30,8 +30,8 @@ import scriptletFilteringEngine from './scriptlet-filtering.js';
 import staticNetFilteringEngine from './static-net-filtering.js';
 import µb from './background.js';
 import { FilteringContext } from './filtering-context.js';
+import { LineIterator } from './text-utils.js';
 import { sessionFirewall } from './dynamic-net-filtering.js';
-import { LineIterator } from './text-iterators.js';
 
 import {
     domainFromHostname,

src/js/dynamic-net-filtering.js

@@ -28,7 +28,7 @@
 import '../lib/punycode.js';
 
 import globals from './globals.js';
-import { LineIterator } from './text-iterators.js';
+import { LineIterator } from './text-utils.js';
 
 import {
     decomposeHostname,

src/js/hnswitches.js

@@ -28,7 +28,7 @@
 import '../lib/punycode.js';
 
 import globals from './globals.js';
-import { LineIterator } from './text-iterators.js';
+import { LineIterator } from './text-utils.js';
 import { decomposeHostname } from './uri-utils.js';
 
 /******************************************************************************/

src/js/pagestore.js

@@ -27,6 +27,7 @@ import contextMenu from './contextmenu.js';
 import logger from './logger.js';
 import staticNetFilteringEngine from './static-net-filtering.js';
 import µb from './background.js';
+import { orphanizeString } from './text-utils.js';
 import { redirectEngine } from './redirect-engine.js';
 import { sessionFirewall } from './dynamic-net-filtering.js';
 import { sessionSwitches } from './hnswitches.js';
@@ -468,7 +469,7 @@ const PageStore = class {
         ) {
             return false;
         }
-        this.title = µb.orphanizeString(details.title.slice(0, 128));
+        this.title = orphanizeString(details.title.slice(0, 128));
         return true;
     }
 

src/js/redirect-engine.js

@@ -24,8 +24,11 @@
 /******************************************************************************/
 
 import io from './assets.js';
-import µb from './background.js';
+
-import { LineIterator } from './text-iterators.js';
+import {
+    LineIterator,
+    orphanizeString,
+} from './text-utils.js';
 
 /******************************************************************************/
 
@@ -409,7 +412,7 @@ RedirectEngine.prototype.resourcesFromString = function(text) {
         // No more data, add the resource.
         const name = this.aliases.get(fields[0]) || fields[0];
         const mime = fields[1];
-        const content = µb.orphanizeString(
+        const content = orphanizeString(
             fields.slice(2).join(encoded ? '' : '\n')
         );
         this.resources.set(

src/js/storage.js

@@ -36,7 +36,6 @@ import staticFilteringReverseLookup from './reverselookup.js';
 import staticNetFilteringEngine from './static-net-filtering.js';
 import µb from './background.js';
 import { hostnameFromURI } from './uri-utils.js';
-import { LineIterator } from './text-iterators.js';
 import { permanentFirewall } from './dynamic-net-filtering.js';
 import { permanentSwitches } from './hnswitches.js';
 import { permanentURLFiltering } from './url-net-filtering.js';
@@ -50,6 +49,11 @@ import {
     CompiledListWriter,
 } from './static-filtering-io.js';
 
+import {
+    LineIterator,
+    orphanizeString,
+} from './text-utils.js';
+
 /******************************************************************************/
 
 µb.getBytesInUse = async function() {
@@ -898,10 +902,6 @@ self.addEventListener('hiddenSettingsChanged', ( ) => {
 
 // https://github.com/gorhill/uBlock/issues/3406
 //   Lower minimum update period to 1 day.
-// https://bugs.chromium.org/p/v8/issues/detail?id=2869
-//   orphanizeString is to work around String.slice() potentially causing
-//   the whole raw filter list to be held in memory just because we cut out
-//   the title as a substring.
 
 µb.extractFilterListMetadata = function(assetKey, raw) {
     const listEntry = this.availableFilterLists[assetKey];
@@ -914,13 +914,13 @@ self.addEventListener('hiddenSettingsChanged', ( ) => {
         let matches = head.match(/(?:^|\n)(?:!|# )[\t ]*Title[\t ]*:([^\n]+)/i);
         const title = matches && matches[1].trim() || '';
         if ( title !== '' && title !== listEntry.title ) {
-            listEntry.title = this.orphanizeString(title);
+            listEntry.title = orphanizeString(title);
             io.registerAssetSource(assetKey, { title });
         }
         matches = head.match(/(?:^|\n)(?:!|# )[\t ]*Homepage[\t ]*:[\t ]*(https?:\/\/\S+)\s/i);
         const supportURL = matches && matches[1] || '';
         if ( supportURL !== '' && supportURL !== listEntry.supportURL ) {
-            listEntry.supportURL = this.orphanizeString(supportURL);
+            listEntry.supportURL = orphanizeString(supportURL);
             io.registerAssetSource(assetKey, { supportURL });
         }
     }

src/js/text-utils.js

@@ -23,6 +23,17 @@
 
 /******************************************************************************/
 
+// https://bugs.chromium.org/p/v8/issues/detail?id=2869
+//   orphanizeString is to work around String.slice() potentially causing
+//   the whole raw filter list to be held in memory just because we cut out
+//   the title as a substring.
+
+function orphanizeString(s) {
+    return JSON.parse(JSON.stringify(s));
+}
+
+/******************************************************************************/
+
 class LineIterator {
     constructor(text, offset) {
         this.text = text;
@@ -89,4 +100,8 @@ class FieldIterator {
 
 /******************************************************************************/
 
-export { LineIterator, FieldIterator };
+export {
+    FieldIterator,
+    LineIterator,
+    orphanizeString,
+};

src/js/url-net-filtering.js

@@ -23,7 +23,7 @@
 
 /******************************************************************************/
 
-import { LineIterator } from './text-iterators.js';
+import { LineIterator } from './text-utils.js';
 import { decomposeHostname } from './uri-utils.js';
 
 /*******************************************************************************

src/js/utils.js

@@ -141,14 +141,6 @@ import µb from './background.js';
 
 /******************************************************************************/
 
-// TODO: evaluate using TextEncoder/TextDecoder
-
-µb.orphanizeString = function(s) {
-    return JSON.parse(JSON.stringify(s));
-};
-
-/******************************************************************************/
-
 µb.fireDOMEvent = function(name) {
     if (
         window instanceof Object &&