Method performFileEdit

context/ChangesManager.cpp:298–452

}

bool ChangesManager::performFileEdit(
    const QString &filePath, const QString &oldContent, const QString &newContent, QString *errorMsg)
{
    auto setError = [errorMsg](const QString &msg) {
        if (errorMsg) *errorMsg = msg;
    };

    auto editors = Core::EditorManager::visibleEditors();
    for (auto *editor : editors) {
        if (!editor || !editor->document()) {
            continue;
        }

        QString editorPath = editor->document()->filePath().toFSPathString();
        if (editorPath == filePath) {
            QByteArray contentBytes = editor->document()->contents();
            QString currentContent = QString::fromUtf8(contentBytes);

            if (oldContent.isEmpty()) {
                if (auto *textEditor
                    = qobject_cast<TextEditor::TextDocument *>(editor->document())) {
                    QTextDocument *doc = textEditor->document();
                    
                    QTextCursor cursor(doc);
                    cursor.beginEditBlock();
                    cursor.movePosition(QTextCursor::End);
                    cursor.insertText(newContent);
                    cursor.endEditBlock();
                    
                    LOG_MESSAGE(QString("Appended to open editor: %1").arg(filePath));
                    setError("Applied successfully (appended to end of file)");
                    return true;
                }
            }

            int matchPos = currentContent.indexOf(oldContent);
            if (matchPos != -1) {
                if (auto *textEditor
                    = qobject_cast<TextEditor::TextDocument *>(editor->document())) {
                    QTextDocument *doc = textEditor->document();
                    
                    QTextCursor cursor(doc);
                    cursor.beginEditBlock();
                    cursor.setPosition(matchPos);
                    cursor.setPosition(matchPos + oldContent.length(), QTextCursor::KeepAnchor);
                    cursor.removeSelectedText();
                    cursor.insertText(newContent);
                    cursor.endEditBlock();
                    
                    LOG_MESSAGE(QString("Updated open editor (exact match): %1").arg(filePath));
                    setError("Applied successfully (exact match)");
                    return true;
                }
            } else {
                double similarity = 0.0;
                QString matchedContent = findBestMatch(currentContent, oldContent, 0.82, &similarity);
                if (!matchedContent.isEmpty()) {
                    matchPos = currentContent.indexOf(matchedContent);