[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>

8 files changed, 42 insertions, 43 deletions

diff --git a/searx/static/themes/__common__/less/stats.less b/searx/static/themes/__common__/less/stats.less
new file mode 100644
index 000000000..6c2117b39
--- /dev/null
+++ b/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));
+}
diff --git a/searx/static/themes/oscar/src/less/logicodev-dark/oscar.less b/searx/static/themes/oscar/src/less/logicodev-dark/oscar.less
index 44d3154a8..53ee7ae31 100644
--- a/searx/static/themes/oscar/src/less/logicodev-dark/oscar.less
+++ b/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);
 
diff --git a/searx/static/themes/oscar/src/less/logicodev/oscar.less b/searx/static/themes/oscar/src/less/logicodev/oscar.less
index 3415af30b..57c351bd9 100644
--- a/searx/static/themes/oscar/src/less/logicodev/oscar.less
+++ b/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";
diff --git a/searx/static/themes/oscar/src/less/logicodev/preferences.less b/searx/static/themes/oscar/src/less/logicodev/preferences.less
index 790ed10b7..32e230413 100644
--- a/searx/static/themes/oscar/src/less/logicodev/preferences.less
+++ b/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;
-}
diff --git a/searx/static/themes/oscar/src/less/pointhi/oscar.less b/searx/static/themes/oscar/src/less/pointhi/oscar.less
index 4ac8da564..689fc1471 100644
--- a/searx/static/themes/oscar/src/less/pointhi/oscar.less
+++ b/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";
diff --git a/searx/static/themes/oscar/src/less/pointhi/preferences.less b/searx/static/themes/oscar/src/less/pointhi/preferences.less
index 352aed513..25ba100d6 100644
--- a/searx/static/themes/oscar/src/less/pointhi/preferences.less
+++ b/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;
-}
-
diff --git a/searx/static/themes/simple/less/style.less b/searx/static/themes/simple/less/style.less
index b82b1cb1f..3b0506b98 100644
--- a/searx/static/themes/simple/less/style.less
+++ b/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";
 
diff --git a/searx/static/themes/simple/less/toolkit.less b/searx/static/themes/simple/less/toolkit.less
index 3e9274fc8..c381af802 100644
--- a/searx/static/themes/simple/less/toolkit.less
+++ b/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;
-}