[WIP] Allow modules to register *framework* params

I'm not yet convinced about this solution. The name
*framework parameter* isn't always correct. (i.e. page)

Then there's also an alternative available by using the
`rel` attribute of anchors with a custom value. If it's
set our JS preserves (or doesn't) the `_dashlet` param.
It cannot do that for every url that's loaded into the
same container. (e.g. stat badges in the footer of lists)

library/Icinga/Application/Modules/Module.php

@@ -207,6 +207,9 @@ class Module
      */
     protected $routes = array();
 
+    /** @var string[] Framework parameters of this module */
+    protected $frameworkParams = [];
+
     /**
      * A set of menu elements
      *
@@ -283,6 +286,18 @@ class Module
         $this->translationDomain = $name;
     }
 
+    /**
+     * Get this module's framework parameters
+     *
+     * @return string[]
+     */
+    public function getFrameworkParams(): array
+    {
+        $this->launchConfigScript();
+
+        return $this->frameworkParams;
+    }
+
     /**
      * Provide a search URL
      *
@@ -1461,4 +1476,18 @@ class Module
         $this->routes[$name] = $route;
         return $this;
     }
+
+    /**
+     * Register URL parameters which should be ignored by various URL handlers
+     *
+     * @param string ...$params
+     *
+     * @return $this
+     */
+    protected function addFrameworkParams(string ...$params): self
+    {
+        $this->frameworkParams = array_merge($this->frameworkParams, $params);
+
+        return $this;
+    }
 }

library/Icinga/Application/Web.php

@@ -133,6 +133,33 @@ class Web extends EmbeddedWeb
         return array_combine($themes, $themes);
     }
 
+    /**
+     * Get default framework parameters and those of the current module
+     *
+     * @return string[]
+     */
+    public function getFrameworkParams(): array
+    {
+        $defaultParams = [
+            'isIframe',
+            'showFullscreen',
+            'showCompact',
+            'renderLayout',
+            '_disableLayout',
+            '_dashlet',
+            '_dev',
+            // TODO: is this really a "framework" param? or should the all be called differently, widgetyUrlFlags perhaps?
+            'page'
+        ];
+
+        $moduleParams = [];
+        if (($moduleName = $this->getRequest()->getModuleName()) !== 'default') {
+            $moduleParams = $this->getModuleManager()->getModule($moduleName)->getFrameworkParams();
+        }
+
+        return array_merge($defaultParams, $moduleParams);
+    }
+
     /**
      * Prepare routing
      *

library/Icinga/Web/Controller.php

@@ -3,6 +3,7 @@
 
 namespace Icinga\Web;
 
+use Icinga\Application\Icinga;
 use Icinga\Data\Filterable;
 use Icinga\Data\Sortable;
 use Icinga\Data\QueryInterface;
@@ -234,16 +235,17 @@ class Controller extends ModuleActionController
             'limit', // setupPaginationControl()
             'sort', // setupSortControl()
             'dir', // setupSortControl()
-            'backend', // Framework
-            'showCompact', // Framework
-            '_dev' // Framework
         );
 
         $editor = Widget::create('filterEditor');
         /** @var \Icinga\Web\Widget\FilterEditor $editor */
         call_user_func_array(
             array($editor, 'preserveParams'),
-            array_merge($defaultPreservedParams, $preserveParams ?: array())
+            array_merge(
+                Icinga::app()->getFrameworkParams(),
+                $defaultPreservedParams,
+                $preserveParams ?: array()
+            )
         );
 
         $editor

modules/monitoring/application/controllers/ListController.php

@@ -729,7 +729,6 @@ class ListController extends Controller
     protected function filterQuery(DataView $dataView)
     {
         $this->setupFilterControl($dataView, null, null, array(
-            'format', // handleFormatRequest()
             'stateType', // hostsAction() and servicesAction()
             'addColumns', // addColumns()
             'problems', // servicegridAction()

modules/monitoring/configuration.php

@@ -120,6 +120,8 @@ $this->provideSearchUrl($this->translate('Services'), 'monitoring/list/services?
 $this->provideSearchUrl($this->translate('Hostgroups'), 'monitoring/list/hostgroups?limit=10', 97);
 $this->provideSearchUrl($this->translate('Servicegroups'), 'monitoring/list/servicegroups?limit=10', 96);
 
+$this->addFrameworkParams('backend', 'format');
+
 /*
  * Available navigation items
  */