[fix] make /stats more CSP compliant - bar graph

Replace bar graph's *styles* (see below) by CSP compliant implementation in
``searx/static/themes/__common__/less/stats.less`` ::

    ./simple/stats.html:49: <span style="width: calc(max(2px, 100%*{{ (engine_stat.result_count / engine_stats.max_result_count )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
    ./simple/stats.html:57: <span style="width: calc(max(2px, 100%*{{ (engine_stat.http / engine_stats.max_time )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
    ./simple/stats.html:58: <span style="width: calc(100%*{{ engine_stat.processing / engine_stats.max_time |round(3) }})" class="stacked-bar-chart-serie2"></span>{{- "" -}}
    ./oscar/stats.html:50:  <span style="width: calc(max(2px, 100%*{{ (engine_stat.result_count / engine_stats.max_result_count )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
    ./oscar/stats.html:58:  <span style="width: calc(max(2px, 100%*{{ (engine_stat.http / engine_stats.max_time )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
    ./oscar/stats.html:59:  <span style="width: calc(100%*{{ engine_stat.processing / engine_stats.max_time |round(3) }})" class="stacked-bar-chart-serie2"></span>{{- "" -}}

Reported-by: https://github.com/searxng/searxng/issues/57
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/__common__/less/stats.less

@@ -0,0 +1,38 @@
+.bar-chart-value {
+    width: 3em;
+}
+
+.bar-chart-graph {
+    width: 300px;
+}
+
+.bar-chart-bar {
+    border: 3px solid #5bc0de;
+    margin: 1px 0;
+}
+
+.bar-chart-serie1 {
+    border: 3px solid #5bc0de;
+    margin: 1px 0;
+    float: left;
+}
+
+.bar-chart-serie2 {
+    border: 3px solid #deb15b;
+    margin: 1px 0;
+    float: left;
+}
+
+.bar0{
+    width: 0;
+    border: 0;
+}
+
+.generate-bar(100);
+
+.generate-bar(@n, @i: 1) when (@i =< @n) {
+  .bar@{i} {
+    width: (@i * 100% / @n);
+  }
+  .generate-bar(@n, (@i + 1));
+}

searx/static/themes/oscar/src/less/logicodev-dark/oscar.less

@@ -1,5 +1,6 @@
 @import "../logicodev/variables.less";
 @import "../../../../__common__/less/new_issue.less";
+@import "../../../../__common__/less/stats.less";
 
 @stacked-bar-chart: rgb(213, 216, 215, 1);
 

searx/static/themes/oscar/src/less/logicodev/oscar.less

@@ -1,5 +1,6 @@
 @import "variables.less";
 @import "../../../../__common__/less/new_issue.less";
+@import "../../../../__common__/less/stats.less";
 
 @import "navbar.less";
 @import "footer.less";

searx/static/themes/oscar/src/less/logicodev/preferences.less

@@ -89,17 +89,3 @@ td:hover .engine-tooltip, th:hover .engine-tooltip, .engine-tooltip:hover {
     padding: 0.4rem 0;
     width: 1px;
 }
-
-.stacked-bar-chart-serie1 {
-    .stacked-bar-chart-base();
-    background: #5bc0de;
-    box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-    padding: 0.4rem 0;
-}
-
-.stacked-bar-chart-serie2 {
-    .stacked-bar-chart-base();
-    background: #deb15b;
-    box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-    padding: 0.4rem 0;
-}

searx/static/themes/oscar/src/less/pointhi/oscar.less

@@ -1,5 +1,6 @@
 @import "variables.less";
 @import "../../../../__common__/less/new_issue.less";
+@import "../../../../__common__/less/stats.less";
 
 @import "footer.less";
 @import "checkbox.less";

searx/static/themes/oscar/src/less/pointhi/preferences.less

@@ -77,18 +77,3 @@ th:hover .engine-tooltip, td:hover .engine-tooltip, .engine-tooltip:hover {
     padding: 0.4rem 0;
     width: 1px;
 }
-
-.stacked-bar-chart-serie1 {
-    .stacked-bar-chart-base();
-    background: #5bc0de;
-    box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-    padding: 0.4rem 0;
-}
-
-.stacked-bar-chart-serie2 {
-    .stacked-bar-chart-base();
-    background: #deb15b;
-    box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-    padding: 0.4rem 0;
-}
-

searx/static/themes/simple/less/style.less

@@ -7,6 +7,7 @@
 @stacked-bar-chart: rgb(0, 0, 0);
 
 @import "../../__common__/less/new_issue.less";
+@import "../../__common__/less/stats.less";
 
 @import "normalize.less";
 

searx/static/themes/simple/less/toolkit.less

@@ -551,17 +551,3 @@ th:hover .engine-tooltip, td:hover .engine-tooltip, .engine-tooltip:hover {
   padding: 0.4rem 0;
   width: 1px;
 }
-
-.stacked-bar-chart-serie1 {
-  .stacked-bar-chart-base();
-  background: #5bc0de;
-  box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-  padding: 0.4rem 0;
-}
-
-.stacked-bar-chart-serie2 {
-  .stacked-bar-chart-base();
-  background: #deb15b;
-  box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-  padding: 0.4rem 0;
-}

searx/templates/oscar/stats.html

@@ -45,19 +45,19 @@
                             </td>
                             <td>
                                 {%- if engine_stat.result_count -%}
-                                <span class="stacked-bar-chart-value">{{- engine_stat.result_count | int -}}</span>{{- "" -}}
-                                <span class="stacked-bar-chart" aria-hidden="true">{{- "" -}}
-                                    <span style="width: calc(max(2px, 100%*{{ (engine_stat.result_count / engine_stats.max_result_count )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
-                                </span>
+                                <div class="bar-chart-value">{{- engine_stat.result_count | int -}}</div>{{- "" -}}
+				<div class="bar-chart-graph" aria-hidden="true">
+				  <div class="bar-chart-bar bar{{ (100 * engine_stat.result_count / engine_stats.max_result_count)|round }}"></div>{{- "" -}}
+				</div>
                                 {%- endif -%}
                             </td>
                             <td>
                                 {%- if engine_stat.total -%}
-                                <span class="stacked-bar-chart-value">{{- engine_stat.total | round(1) -}}</span>{{- "" -}}
-                                <span class="stacked-bar-chart" aria-labelledby="{{engine_stat.name}}_time" aria-hidden="true">{{- "" -}}
-                                    <span style="width: calc(max(2px, 100%*{{ (engine_stat.http / engine_stats.max_time )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
-                                    <span style="width: calc(100%*{{ engine_stat.processing / engine_stats.max_time |round(3) }})" class="stacked-bar-chart-serie2"></span>{{- "" -}}
-                                </span>{{- "" -}}
+                                <div class="bar-chart-value">{{- engine_stat.total | round(1) -}}</div>{{- "" -}}
+				<div class="bar-chart-graph" aria-labelledby="{{engine_stat.name}}_time" aria-hidden="true">
+                                  <div class="bar-chart-serie1 bar{{ (100 * engine_stat.http / engine_stats.max_time)|round }}"></div>{{- "" -}}
+                                  <div class="bar-chart-serie2 bar{{ (100 * engine_stat.processing / engine_stats.max_time)|round }}"></div>{{- "" -}}
+				</div>
                                 <div class="engine-tooltip text-left" role="tooltip" id="{{engine_stat.name}}_time">{{- "" -}}
                                     <table class="table table-striped">
                                         <tr>

searx/templates/simple/stats.html

@@ -44,19 +44,21 @@
         </td>
         <td>
             {%- if engine_stat.result_count -%}
-            <span class="stacked-bar-chart-value">{{- engine_stat.result_count | int -}}</span>{{- "" -}}
-            <span class="stacked-bar-chart" aria-hidden="true">{{- "" -}}
-                <span style="width: calc(max(2px, 100%*{{ (engine_stat.result_count / engine_stats.max_result_count )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
-            </span>
+
+            <div class="bar-chart-value">{{- engine_stat.result_count | int -}}</div>{{- "" -}}
+	    <div class="bar-chart-graph" aria-hidden="true">
+	      <div class="bar-chart-bar bar{{ (100 * engine_stat.result_count / engine_stats.max_result_count)|round }}"></div>{{- "" -}}
+	    </div>
             {%- endif -%}
         </td>
         <td>
             {%- if engine_stat.total -%}
-            <span class="stacked-bar-chart-value">{{- engine_stat.total | round(1) -}}</span>{{- "" -}}
-            <span class="stacked-bar-chart" aria-labelledby="{{engine_stat.name}}_time" aria-hidden="true">{{- "" -}}
-                <span style="width: calc(max(2px, 100%*{{ (engine_stat.http / engine_stats.max_time )|round(3) }}))" class="stacked-bar-chart-serie1"></span>{{- "" -}}
-                <span style="width: calc(100%*{{ engine_stat.processing / engine_stats.max_time |round(3) }})" class="stacked-bar-chart-serie2"></span>{{- "" -}}
-            </span>{{- "" -}}
+
+            <div class="bar-chart-value">{{- engine_stat.total | round(1) -}}</div>{{- "" -}}
+	    <div class="bar-chart-graph" aria-labelledby="{{engine_stat.name}}_time" aria-hidden="true">
+              <div class="bar-chart-serie1 bar{{ (100 * engine_stat.http / engine_stats.max_time)|round }}"></div>{{- "" -}}
+              <div class="bar-chart-serie2 bar{{ (100 * engine_stat.processing / engine_stats.max_time)|round }}"></div>{{- "" -}}
+	    </div>
             <div class="engine-tooltip" role="tooltip" id="{{engine_stat.name}}_time">{{- "" -}}
                 <table>
                     <tr>