[mod] show !bang of (secondary) categories in the preference

The name of the *secondary* categories in the preferences are translated, to use
this categories the user needs to know by which !bang the category can be
selected.  Related to "Make 'non tab category' bangs discoverable" in [#690].

[#690] https://github.com/searxng/searxng/issues/690

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/less/definitions.less

@@ -113,8 +113,8 @@
   --color-toolkit-engine-tooltip-background: #fff;
   --color-toolkit-loader-border: rgba(0, 0, 0, 0.2);
   --color-toolkit-loader-borderleft: rgba(255, 255, 255, 0);
-  --color-doc-code: #300;
-  --color-doc-code-background: #fdd;
+  --color-doc-code: #003;
+  --color-doc-code-background: #ddeaff;
 }
 
 .dark-themes() {
@@ -225,8 +225,8 @@
   --color-toolkit-engine-tooltip-background: #222;
   --color-toolkit-loader-border: rgba(255, 255, 255, 0.2);
   --color-toolkit-loader-borderleft: rgba(0, 0, 0, 0);
-  --color-doc-code: #fdd;
-  --color-doc-code-background: #300;
+  --color-doc-code: #003;
+  --color-doc-code-background: #bdcadf;
 }
 
 /// Dark Theme (autoswitch based on device pref)

searx/static/themes/simple/src/less/preferences.less

@@ -121,6 +121,15 @@
       .ltr-text-align-left();
       font-weight: normal;
       background: var(--color-settings-engine-group-background);
+
+      .group-bang {
+        .ltr-margin-left(1rem);
+        .rounded-corners-tiny;
+        background: var(--color-doc-code-background);
+        color: var(--color-doc-code);
+        padding: 0.2rem;
+        border: 0 none;
+      }
     }
 
     .name,

searx/templates/simple/preferences.html

@@ -314,9 +314,9 @@
         <th>{{ _("Max time") }}</th>{{- "" -}}
         <th>{{ _("Reliability") }}</th>{{- "" -}}
       </tr>
-      {% for group, engines in engines_by_category[categ] | group_engines_in_tab %}
+      {% for group, group_bang, engines in engines_by_category[categ] | group_engines_in_tab %}
       {% if loop.length > 1 %}
-      <tr><th colspan="9" class="engine-group">{{_(group)}}</th></tr>
+      <tr><th colspan="9" class="engine-group">{{_(group)}}{% if group_bang %}<span class="group-bang">{{group_bang}}</span>{% endif %}</th></tr>{{- "" -}}
       {% endif %}
       {% for search_engine in engines %}
       {% if not search_engine.private %}

searx/webutils.py

@@ -175,4 +175,8 @@ def group_engines_in_tab(engines: Iterable[Engine]) -> List[Tuple[str, Iterable[
     def engine_sort_key(engine):
         return (engine.about.get('language', ''), engine.name)
 
-    return [(groupname, sorted(engines, key=engine_sort_key)) for groupname, engines in sorted_groups]
+    ret_val = []
+    for groupname, engines in sorted_groups:
+        group_bang = '!' + groupname.replace(' ', '_') if groupname != DEFAULT_GROUP_NAME else ''
+        ret_val.append((groupname, group_bang, sorted(engines, key=engine_sort_key)))
+    return ret_val