[simple theme] refactor search form

* update search input form params; inspiried by whoogle
* remove autofocus from result page input form (JS impl. as well as input param)
-> autofocus on landing page still works only on desktop and tablet with JS impl.
* update landing page margins on mobile
* rework border and radius for search form to 0.8rem and outline
* remove positioning from autocomplete JS lib and use CSS impl.
* match search box and autocomplete width
* rework search form to a google like design on mobile
* fix settings icon display withg RTL on mobile on result page when search input is empty

5 files changed, 70 insertions, 62 deletions

diff --git a/searx/static/themes/simple/src/js/main/search.js b/searx/static/themes/simple/src/js/main/search.js
index 1fb0a7cb8..798c9b2d3 100644
--- a/searx/static/themes/simple/src/js/main/search.js
+++ b/searx/static/themes/simple/src/js/main/search.js
@@ -5,6 +5,8 @@
 
   var firstFocus = true, qinput_id = "q", qinput;
 
+  const isMobile = window.matchMedia("only screen and (max-width: 50em)").matches;
+
   function placeCursorAtEnd (element) {
     if (element.setSelectionRange) {
       var len = element.value.length;
@@ -68,12 +70,7 @@
           },
           MinChars: 4,
           Delay: 300,
-          _Position: function () {
-            this.DOMResults.setAttribute("class", "autocomplete");
-            this.DOMResults.style.top = (this.Input.offsetTop + this.Input.offsetHeight) + "px";
-            this.DOMResults.style.left = this.Input.offsetLeft + "px";
-            this.DOMResults.style.width = this.Input.clientWidth + "px";
-          },
+          _Position: function () {},
           _Open: function () {
             var params = this;
             Array.prototype.forEach.call(this.DOMResults.getElementsByTagName("li"), function (li) {
@@ -85,16 +82,13 @@
             });
           },
         }, "#" + qinput_id);
-
-        // hack, see : https://github.com/autocompletejs/autocomplete.js/issues/37
-        w.addEventListener('resize', function () {
-          var event = new CustomEvent("position");
-          qinput.dispatchEvent(event);
-        });
       }
 
       qinput.addEventListener('focus', placeCursorAtEndOnce, false);
-      qinput.focus();
+
+      if (!isMobile) {
+        qinput.focus();
+      }
     }
 
     // vanilla js version of search_on_category_select.js
diff --git a/searx/static/themes/simple/src/less/autocomplete.less b/searx/static/themes/simple/src/less/autocomplete.less
index a1a74480b..7c211fbb0 100644
--- a/searx/static/themes/simple/src/less/autocomplete.less
+++ b/searx/static/themes/simple/src/less/autocomplete.less
@@ -2,6 +2,7 @@
 
 .autocomplete {
   position: absolute;
+  width: @search-width;
   max-height: 0;
   overflow-y: hidden;
   .ltr-text-align-left();
@@ -25,7 +26,7 @@
 
     > li {
       cursor: pointer;
-      padding: 0.5rem;
+      padding: 0.5rem 1rem;
 
       &.active,
       &:active,
@@ -51,9 +52,10 @@
     background-color: var(--color-autocomplete-background);
     color: var(--color-autocomplete-font);
     border: 1px solid var(--color-autocomplete-border);
-    max-height: 500px;
+    max-height: 32rem;
     overflow-y: auto;
     z-index: 100;
+    margin-top: 3.2rem;
 
     &:empty {
       display: none;
@@ -63,11 +65,10 @@
 
 @media screen and (max-width: @phone) {
   .autocomplete {
-    bottom: 0;
-  }
+    width: 100%;
 
-  .autocomplete > ul > li {
-    border-bottom: 1px solid var(--color-result-top-border);
-    text-align: left;
+    > ul > li {
+      padding: 1rem;
+    }
   }
 }
diff --git a/searx/static/themes/simple/src/less/definitions.less b/searx/static/themes/simple/src/less/definitions.less
index 6e7dd4eb2..b21e91e90 100644
--- a/searx/static/themes/simple/src/less/definitions.less
+++ b/searx/static/themes/simple/src/less/definitions.less
@@ -242,7 +242,7 @@
 @result-padding: 1rem;
 @results-image-row-height: 12rem;
 @results-image-row-height-phone: 6rem;
-@search-width: 40rem;
+@search-width: 44rem;
 // heigh of #search, see detail.less
 @search-height: 7.6rem;
 
diff --git a/searx/static/themes/simple/src/less/index.less b/searx/static/themes/simple/src/less/index.less
index b80d75c8c..8590d0c3b 100644
--- a/searx/static/themes/simple/src/less/index.less
+++ b/searx/static/themes/simple/src/less/index.less
@@ -49,9 +49,3 @@
     margin-top: 6em;
   }
 }
-
-@media screen and (max-width: @phone) {
-  #main_index {
-    margin-top: 0;
-  }
-}
diff --git a/searx/static/themes/simple/src/less/search.less b/searx/static/themes/simple/src/less/search.less
index 62fda55b7..ee06a74c4 100644
--- a/searx/static/themes/simple/src/less/search.less
+++ b/searx/static/themes/simple/src/less/search.less
@@ -89,10 +89,14 @@
   }
 }
 
-.search_box {
-  margin: 0;
-  padding: 0;
+#search_view {
   grid-area: search;
+}
+
+.search_box {
+  border: 1px solid var(--color-search-border);
+  border-radius: 0.8rem;
+  width: @search-width;
   display: inline-flex;
   flex-direction: row;
   white-space: nowrap;
@@ -102,18 +106,14 @@
   display: block;
   border-collapse: separate;
   box-sizing: border-box;
-  width: 1.8em;
+  width: 1.8rem;
   margin: 0;
-  padding: 8px 2px;
+  padding: 0.8rem 0.2rem;
   background: none repeat scroll 0 0 var(--color-search-background);
-  border-top: 1px solid var(--color-search-border);
-  border-bottom: 1px solid var(--color-search-border);
-  border-right: none;
-  border-left: none;
-  border-radius: 0;
+  border: none;
   outline: none;
   color: var(--color-search-font);
-  font-size: 16px;
+  font-size: 1.1rem;
   z-index: 10000;
 
   &:hover {
@@ -131,27 +131,22 @@ html.no-js #clear_search.hide_if_nojs {
 
 #q,
 #send_search {
-  display: block !important;
-  border-collapse: separate;
-  box-sizing: border-box;
+  display: block;
   margin: 0;
-  padding: 10px;
+  padding: 0.8rem;
   background: none repeat scroll 0 0 var(--color-search-background);
-  border: 1px solid var(--color-search-border);
-  border-radius: 0;
+  border: none;
   outline: none;
   color: var(--color-search-font);
-  font-size: 16px;
+  font-size: 1.1rem;
   z-index: 2;
 }
 
 #q {
-  outline: medium none;
-  .ltr-padding-left(12px);
+  width: 100%;
+  .ltr-padding-left(1rem);
   .ltr-padding-right(0) !important;
-  .ltr-border-right(none);
-  width: @search-width;
-  .ltr-rounded-left-corners(10px);
+  .ltr-rounded-left-corners(0.8rem);
 }
 
 #q::-ms-clear,
@@ -160,8 +155,7 @@ html.no-js #clear_search.hide_if_nojs {
 }
 
 #send_search {
-  .ltr-border-left(none);
-  .ltr-rounded-right-corners(10px);
+  .ltr-rounded-right-corners(0.8rem);
 
   &:hover {
     cursor: pointer;
@@ -174,7 +168,6 @@ html.no-js #clear_search.hide_if_nojs {
 .no-js #send_search {
   width: auto !important;
   .ltr-border-left(1px solid var(--color-search-border));
-  padding: 10px;
 }
 
 .search_filters {
@@ -259,10 +252,9 @@ html.no-js #clear_search.hide_if_nojs {
   }
 
   .search_box {
-    // hack, should be 100% ?
-    width: 99%;
+    width: 98%;
     display: flex;
-    flex-direction: row;
+    margin: 0 auto;
   }
 
   #q {
@@ -270,11 +262,6 @@ html.no-js #clear_search.hide_if_nojs {
     flex: 1;
   }
 
-  #main_results #q:placeholder-shown ~ #send_search {
-    margin-right: 2.6rem;
-    transition: margin-right 0.1s; // FIX RTL
-  }
-
   .search_filters {
     margin: 0;
   }
@@ -285,7 +272,7 @@ html.no-js #clear_search.hide_if_nojs {
     margin: 0;
 
     label {
-      padding: 0.8rem !important;
+      padding: 1rem !important;
       margin: 0 !important;
 
       svg {
@@ -293,6 +280,38 @@ html.no-js #clear_search.hide_if_nojs {
       }
     }
   }
+
+  #search_view:focus-within {
+    display: block;
+    background-color: var(--color-base-background);
+    position: absolute;
+    top: 0;
+    height: 100%;
+    width: 100%;
+    z-index: 10000;
+
+    .search_box {
+      border-top: none;
+      border-left: none;
+      border-right: none;
+      width: 100%;
+      border-radius: 0;
+
+      #send_search {
+        .ltr-margin-right(0) !important; // Delete when send_search button is disabled on mobile.
+      }
+
+      * {
+        border: none;
+        border-radius: 0;
+      }
+    }
+  }
+
+  #main_results #q:placeholder-shown ~ #send_search {
+    .ltr-margin-right(2.6rem);
+    transition: margin 0.1s;
+  }
 }
 
 @media screen and (max-width: @ultra-small-phone) {