Method onLanguageChanged

app/src/MQTT/PublisherScriptEditor.cpp:393–415

* @brief Swaps the highlighter and, when recognised, the template variant. */

 * @brief Swaps the highlighter and, when recognised, the template variant.
 */
void MQTT::PublisherScriptEditor::onLanguageChanged(int index)
{
  const int newLang = (index == 1) ? SerialStudio::Lua : SerialStudio::JavaScript;
  if (newLang == m_language)
    return;

  const int tmplIdx = detectTemplate();

  applyLanguage(newLang);

  if (tmplIdx >= 0) {
    const auto& tmpl   = m_templates[tmplIdx];
    const QString code = (newLang == SerialStudio::Lua) ? tmpl.luaCode : tmpl.jsCode;
    m_editor->setPlainText(code);
    m_templateCombo->setCurrentIndex(tmplIdx + 1);
    return;
  }

  const QString trimmed = m_editor->toPlainText().trimmed();
  const int other = (newLang == SerialStudio::Lua) ? SerialStudio::JavaScript : SerialStudio::Lua;
  if (trimmed == defaultPlaceholder(other).trimmed())
    m_editor->setPlainText(defaultPlaceholder(newLang));
}

/**
 * @brief Toggles hex-mode framing of the test input.