[FIX] web_editor: fix issues caused by textContent

Issue #1: reading textContent

When reading the textContent property of an element, its does not take into
account line breaks introduced by <br> and block elements, whilst innerHtml
does.

This commit solves the issue of updating a link's href to a non-sense url
upon label change. Before this commit, "www.abc.com <br> www.xyz.com" was
being incorrectely parsed as "www.abc.comwww.xyz.com".

Issue #2: setting textContent

When setting the textContent property of an element, all of its child nodes are
removed and replaced by a single text node. While this is fine when the
element contains a single text node, it might not be the desired result when
the element contains other children.

This commit solves the issue obtained when pasting html such as
"link.com<br>link.be" inside an empty inline element such as STRONG or A,
in which cleanForSave was changing its content (removing the line-break) due
to misuse of textContent, when the intended effected was simply removing
ZeroWidthSpace characters. A safer alternative for removing ZeroWidthSpace is
thus provided.

task-3081254

closes odoo/odoo#112579

X-original-commit: 9ff7c2ccff5f959f2a1cd7334c42b7bf0134f5d2
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js

@@ -13,7 +13,6 @@ import './commands/align.js';
 import { sanitize } from './utils/sanitize.js';
 import { serializeNode, unserializeNode, serializeSelection } from './utils/serialize.js';
 import {
-    isMacOS,
     closestBlock,
     commonParentGet,
     containsUnremovable,
@@ -70,7 +69,10 @@ import {
     parseHTML,
     splitTextNode,
     isEditorTab,
-    isVoidElement
+    isMacOS,
+    isVoidElement,
+    cleanZWS,
+    isZWS,
 } from './utils/utils.js';
 import { editorCommands } from './commands/commands.js';
 import { Powerbox } from './powerbox/Powerbox.js';
@@ -3762,14 +3764,14 @@ export class OdooEditor extends EventTarget {
         // we only remove the attribute to ensure we don't break some style.
         // Otherwise we remove the entire inline element.
         for (const emptyElement of element.querySelectorAll('[data-oe-zws-empty-inline]')) {
-            if (emptyElement.textContent.length === 1 && emptyElement.textContent.includes('\u200B')) {
+            if (isZWS(emptyElement)) {
                 if (emptyElement.classList.length > 0) {
                     emptyElement.removeAttribute('data-oe-zws-empty-inline');
                 } else {
                     emptyElement.remove();
                 }
             } else {
-                emptyElement.textContent = emptyElement.textContent.replace('\u200B', '');
+                cleanZWS(emptyElement);
                 emptyElement.removeAttribute('data-oe-zws-empty-inline');
             }
         }
@@ -3796,7 +3798,7 @@ export class OdooEditor extends EventTarget {
         // Remove Zero Width Spaces on Font awesome elements
         const faSelector = 'i.fa,span.fa,i.fab,span.fab,i.fad,span.fad,i.far,span.far';
         for (const el of element.querySelectorAll(faSelector)) {
-            el.textContent = el.textContent.replace('\u200B', '');
+            cleanZWS(el);
         }
 
         // Clean custom selections

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js

@@ -16,7 +16,6 @@ import {
     isEditorTab,
     isZWS,
     getUrlsInfosInString,
-    URL_REGEX,
     isVoidElement,
 } from './utils.js';
 
@@ -240,16 +239,17 @@ class Sanitize {
             ) {
                 node.setAttribute('contenteditable', 'false');
             }
+
             if (node.firstChild) {
                 this._parse(node.firstChild);
             }
+
             // Update link URL if label is a new valid link.
             if (node.nodeName === 'A' && anchorEl === node) {
-                const linkLabel = node.textContent;
-                const match = linkLabel.match(URL_REGEX);
-                if (match && match[0] === node.textContent && !node.href.startsWith('mailto:')) {
-                    const urlInfo = getUrlsInfosInString(linkLabel)[0];
-                    node.setAttribute('href', urlInfo.url);
+                const linkLabel = node.innerText;
+                const urlInfo = getUrlsInfosInString(linkLabel);
+                if (urlInfo.length && urlInfo[0].label === linkLabel && !node.href.startsWith('mailto:')) {
+                    node.setAttribute('href', urlInfo[0].url);
                 }
             }
             node = node.nextSibling;

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/utils.js

@@ -2574,3 +2574,14 @@ export function peek(arr) {
 export function isMacOS() {
     return window.navigator.userAgent.includes('Mac');
 }
+
+/**
+ * Remove zero-width spaces from the provided node and its descendants.
+ *
+ * @param {Node} node
+ */
+export function cleanZWS(node) {
+    [node, ...descendants(node)]
+        .filter(node => node.nodeType === Node.TEXT_NODE)
+        .forEach(node => node.nodeValue = node.nodeValue.replace(/\u200B/g, ''));
+}

addons/web_editor/static/src/js/editor/odoo-editor/test/spec/link.test.js

@@ -239,6 +239,14 @@ describe('Link', () => {
                     },
                     contentAfter: '<p>a<a href="https://google.com">google.comu[]</a>b</p>',
                 });
+                await testEditor(BasicEditor, {
+                    contentBefore: '<p>a<a href="https://google.com">google.com[]</a></p>',
+                    stepFunction: async editor => {
+                        await insertLineBreak(editor);
+                        await insertText(editor, 'odoo.com')
+                    },
+                    contentAfter: '<p>a<a href="https://google.com">google.com<br>odoo.com[]</a></p>',
+                });
             });
         });
         describe('range not collapsed', () => {