Move view mixin to plugin.views

InvenTree/plugin/views.py

@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.conf import settings
+
+from plugin.registry import registry
+
+
+class InvenTreePluginViewMixin:
+    """
+    Custom view mixin which adds context data to the view,
+    based on loaded plugins.
+
+    This allows rendered pages to be augmented by loaded plugins.
+
+    """
+
+    def get_plugin_panels(self, ctx):
+        """
+        Return a list of extra 'plugin panels' associated with this view
+        """
+
+        panels = []
+
+        for plug in registry.with_mixin('panel'):
+            panels += plug.render_panels(self, self.request, ctx)
+
+        return panels
+
+    def get_context_data(self, **kwargs):
+        """
+        Add plugin context data to the view
+        """
+
+        ctx = super().get_context_data(**kwargs)
+
+        if settings.PLUGINS_ENABLED:
+            ctx['plugin_panels'] = self.get_plugin_panels(ctx)
+
+        return ctx