Function updateInactivePanePlaceholder

public/js/fileListView.js:2193–2284

(inactiveKey)

}

function updateInactivePanePlaceholder(inactiveKey) {
  if (!window.dualPaneEnabled) return;
  const container = document.getElementById('fileListContainerSecondary');
  if (!container) return;

  const ensurePlaceholderElements = () => {
    let hintEl = container.querySelector('.file-list-dual-hint');
    if (!hintEl) {
      let actionsWrap = container.querySelector('.file-list-actions');
      const hasToolbar = actionsWrap && actionsWrap.querySelector('#fileListActions');
      if (!actionsWrap || hasToolbar) {
        actionsWrap = document.createElement('div');
        actionsWrap.className = 'file-list-actions';
        const title = container.querySelector('#fileListTitleSecondary');
        if (title && title.parentNode === container) {
          title.insertAdjacentElement('afterend', actionsWrap);
        } else {
          container.insertBefore(actionsWrap, container.firstChild);
        }
      }

      hintEl = document.createElement('div');
      hintEl.className = 'file-list-dual-hint';
      hintEl.setAttribute('data-i18n-key', 'dual_pane_secondary_hint');
      hintEl.textContent = t('dual_pane_secondary_hint') || 'Select a folder to open here.';
      actionsWrap.appendChild(hintEl);
    }

    let emptyEl = container.querySelector('#fileListSecondary .empty-state');
    const listEl = container.querySelector('#fileListSecondary');
    if (!emptyEl && listEl && listEl.childElementCount === 0) {
      listEl.classList.add('file-list-secondary-empty');
      emptyEl = document.createElement('div');
      emptyEl.className = 'empty-state';
      emptyEl.setAttribute('data-i18n-key', 'dual_pane_secondary_empty');
      emptyEl.textContent = t('dual_pane_secondary_empty') || 'Select a folder to open in the right pane.';
      listEl.appendChild(emptyEl);
    }

    return { hintEl, emptyEl };
  };

  const state = getPaneState(inactiveKey);
  const paneSourceId = (state && typeof state.sourceId === 'string')
    ? state.sourceId.trim()
    : '';
  const labelSourceId = paneSourceId || readStoredPaneSource(inactiveKey);
  let folder = (state && typeof state.currentFolder === 'string')
    ? state.currentFolder.trim()
    : '';
  if (!folder) {
    folder = readStoredPaneFolder(inactiveKey, labelSourceId);
  }
  const label = folder === 'root' ? getRootCrumbLabel(labelSourceId) : folder;

  const ensured = ensurePlaceholderElements();

  const titleEl = document.getElementById('fileListTitleSecondary');