Hide breadcrumb from CMIS views

Question

We're running Drupal 7.65 and Alfresco 5.2.4. We've the ability to display CMIS content (hosted in Alfresco) by fetching a URI like: https://domain.com/cmis/browser?id=<node_ID>. Doing so allow users who doesn't have access to Alfresco to download a file (if node_ID refers to a file) or browse the content of a directory (if node_ID refers to a directory).

Issue: sharing a directory via this method allow users to navigate the whole content of Alfresco by navigating the breadcrumb.

We'd like to remove this breadcrumb, could you recommend ways to do it ?

Here's what we've been thiking at:

• Ideally, find a Drupal/Alfresco setting that allow us to restrict display
• Comment out the line(s) responsible of displaying this breadcrumb inside Drupal' source code
• less ideally, filter the DOM through JS (document.getElementById('cmis-breadcrumb').innerHTML = '')

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Apologies for my English and the lack of knowledge about CMIS and Drupal

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edit 19/01/2021: I believe I've found the module & the function responsible for the breadcrumb: https://git.drupalcode.org/project/cmis/-/blob/7.x-1.x/cmis_browser/cmis_browser.theme.inc#L125

Answer 1

CMIS Browser, a submodule of CMIS API, handles CMIS links. We are using CMIS API v7.x.x.

Here's the function responsible for the breadcrumb:

# cmis/cmis_browser/cmis_browser.theme.inc #125

function theme_cmis_browser_browse_breadcrumb($variables) {

  $next_img = theme('image', array('path' => drupal_get_path('module', 'cmis_browser') .'/images/next.gif'));
  $contents = '';
  $currentpath = '';

  $contents .= '<div id="cmis-breadcrumb">';
  if (!empty($_GET['type']) && $_GET['type'] == 'popup') {
    $contents .= l('Root', 'cmis/browser'. $currentpath, array('query' => array('type' => 'popup', 'caller' => $_GET['caller'])));
  }
  else {
    $contents .= l('Root', 'cmis/browser'. $currentpath);
  }

  $currentpath = '';
  foreach ($variables['bcarray'] as $space) {
    $contents .= $next_img .' ';
    $currentpath .= '/'. $space;
    if (!empty($_GET['type']) && $_GET['type'] == 'popup') {
      $pagelink = l($space, 'cmis/browser'. $currentpath, array('query' => array('type' => 'popup', 'caller' => $_GET['caller'])));
    }
    else {
      $pagelink = l($space, 'cmis/browser'. $currentpath);
    }
    $contents .= $pagelink;
  }

  $contents .= '</div>';

  return $contents;
}

Our workaround is simply to return an empty <div> earlier:

function theme_cmis_browser_browse_breadcrumb($variables) {
  return '<div id="removed-breadcrumb"></div>';
  
  .....
}

Be careful since it's not a persistent solution.