Index: system.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.js,v
retrieving revision 1.5
diff -u -r1.5 system.js
--- system.js	14 May 2007 16:22:26 -0000	1.5
+++ system.js	20 May 2007 03:56:32 -0000
@@ -78,3 +78,54 @@
   // Trigger the event handler to show the form input if necessary.
   $("select.date-format").trigger("change");
 }
+
+Drupal.moduleDependenciesAttach = function () {
+  $('#system-modules input[@type=checkbox]')
+    .click(function () {
+      Drupal.moduleDependencies(this);
+    });
+}
+
+Drupal.moduleDependencies = function (elt) {
+  var dependencies = Drupal.settings.moduleDependencies.dependencies.[elt.value];
+  var missing = Drupal.settings.moduleDependencies.missing;
+  if (dependencies && dependencies.length) {
+    for (i in dependencies) {
+      // Don't make changes to missing modules.
+      if (missing[dependencies[i]) {
+        continue;
+      }
+      // Iterate through this module's dependencies.
+      $('#edit-status-' + dependencies[i].replace('_', '-')).each(function () {
+        // If this module has just been enabled, also enable the module it's dependent on.
+        if (elt.checked) {
+          $(this)
+            .attr('checked', 'checked')
+            .attr('disabled', 'disabled');
+          }
+        }
+        // If this module has just been disabled, also enable the checkbox for modules it's
+        // dependent on if this was the only enabled dependency.
+        else {
+          if ($(this).attr('disabled')) {
+            var disabled = false;
+            var dependents = Drupal.settings.moduleDependencies.dependents[dependencies[i]];
+            if (dependents && dependents.length) {
+              for (j in dependents) {
+                if ($('#edit-status-' + dependents[j].replace('_', '-')).attr('checked')) {
+                  disabled = true;
+                  break;
+                }
+              }
+              if (disabled == false) {
+                $('#edit-status-' + dependencies[i].replace('_', '-')).attr('disabled', false);
+              }
+            }
+          }
+        }
+        // Process each dependency.
+        Drupal.moduleDependencies(this);
+      });
+    }
+  }
+}
\ No newline at end of file
Index: system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.478
diff -u -r1.478 system.module
--- system.module	17 May 2007 07:28:42 -0000	1.478
+++ system.module	20 May 2007 03:50:42 -0000
@@ -1468,6 +1468,12 @@
 
   // Array for disabling checkboxes in callback system_module_disable.
   $disabled = array();
+  // Array of dependencies for passing to js.
+  $dependencies_js = array();
+  // Array of dependents for passing to js.
+  $dependents_js = array();
+  // Array of missing for passing to js.
+  $missing_js = array();
   $throttle = array();
   // Traverse the files retrieved and build the form.
   foreach ($files as $filename => $file) {
@@ -1485,12 +1491,14 @@
     $dependencies = array();
     // Check for missing dependencies.
     if (is_array($file->info['dependencies'])) {
+      $dependencies_js[$file->name] = $file->info['dependencies'];
       foreach ($file->info['dependencies'] as $dependency) {
         if (!isset($files[$dependency]) || !$files[$dependency]->status) {
           if (isset($files[$dependency])) {
             $dependencies[] = $files[$dependency]->info['name'] . t(' (<span class="admin-disabled">disabled</span>)');
           }
           else {
+            $missing_js[$dependency] = TRUE;
             $dependencies[] = drupal_ucfirst($dependency) . t(' (<span class="admin-missing">missing</span>)');
             $disabled[] = $filename;
             $form['disabled_modules']['#value'][$filename] = FALSE;
@@ -1514,6 +1522,7 @@
     // Mark dependents disabled so user can not remove modules being depended on.
     $dependents = array();
     foreach ($file->info['dependents'] as $dependent) {
+      $dependents_js[$file->name] = $file->info['dependents'];
       if ($files[$dependent]->status == 1) {
         $dependents[] = $files[$dependent]->info['name'] . t(' (<span class="admin-enabled">enabled</span>)');
         $disabled[] = $filename;
@@ -1534,6 +1543,17 @@
     }
   }
 
+  // Pass dependency data to the browser.
+  drupal_add_js(array('moduleDependencies' => array('dependencies' => $dependencies_js, 'dependents' => $dependents_js, 'missing' => $missing_js)), 'setting');
+  drupal_add_js(drupal_get_path('module', 'system') .'/system.js');
+      drupal_add_js('
+// Global Killswitch
+if (Drupal.jsEnabled) {
+  $(document).ready(function() {
+    Drupal.moduleDependenciesAttach();
+  });
+}', 'inline');
+
   $modules_required = drupal_required_modules();
   // Merge in required modules.
   foreach ($modules_required as $required) {