[FIX] web_editor: transform URL in multiple text nodes

Before this commit, if a URL was contained in two or more text nodes,
e.g. <p>"link" ".com"</p>, pressing the space key after the URL failed
to convert it into a link. Such text node split can happen as a result
of backspace or delete in the middle of a text node.

This commit makes sure adjacent text nodes are merged before searching
for a URL in its content.

task-3468763

closes odoo/odoo#148362

X-original-commit: 04f9a90127eac2a403ffe77d1e90dbe659a8fa42
Signed-off-by: Geelen Sébastien (sge) <sge@odoo.com>
Signed-off-by: Rodolpho Cammarosano de Lima (rcdl) <rcdl@odoo.com>

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

@@ -4682,6 +4682,8 @@ export class OdooEditor extends EventTarget {
             !closestElement(selection.anchorNode).closest('a') &&
             selection.anchorNode.nodeType === Node.TEXT_NODE
         ) {
+            // Merge adjacent text nodes.
+            selection.anchorNode.parentNode.normalize();
             const textSliced = selection.anchorNode.textContent.slice(0, selection.anchorOffset);
             const textNodeSplitted = textSliced.split(/\s/);
             const potentialUrl = textNodeSplitted.pop();

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

@@ -4297,6 +4297,16 @@ X[]
                 contentAfter: '<p>a http://test.com b <a href="http://test.com">http://test.com</a>[] c http://test.com d</p>',
                 //in reality: '<p>a http://test.com b <a href="http://test.com">http://test.com</a>&nbsp;[] c http://test.com d</p>'
             });
+            await testEditor(BasicEditor, {
+                contentBefore: '<p>http://test.com[]</p>',
+                stepFunction: async (editor) => {
+                    // Setup: simulate multiple text nodes in a p: <p>"http://test" ".com"</p>
+                    editor.editable.firstChild.firstChild.splitText(11);
+                    // Action: insert space
+                    insertText(editor, ' ');
+                },
+                contentAfter: '<p><a href="http://test.com">http://test.com</a> []</p>',
+            });
         });
         it('should transform url after enter', async () => {
             await testEditor(BasicEditor, {