Widgets: add a switch

1 files changed, 187 insertions, 0 deletions

diff --git a/scss/switch.scss b/scss/switch.scss
new file mode 100644
index 000000000..bb7d4951a
--- /dev/null
+++ b/scss/switch.scss
@@ -0,0 +1,187 @@
+//
+// Switches for Bootstrap 4.
+//
+
+$font-size-base: 1rem;
+$font-size-lg: ($font-size-base * 1.25);
+$font-size-sm: ($font-size-base * .875);
+$input-height: 2.375rem;
+$input-height-sm: 1.9375rem;
+$input-height-lg: 3rem;
+$input-btn-focus-width: .2rem;
+$custom-control-indicator-bg: #dee2e6;
+$custom-control-indicator-disabled-bg: #e9ecef;
+$custom-control-description-disabled-color: #868e96;
+$white: white;
+$theme-colors: (
+  'primary': #08d
+);
+
+//
+// These variables can be used to customize the switch component.
+//
+$switch-height: calc(#{$input-height} * .8) !default;
+$switch-height-sm: calc(#{$input-height-sm} * .8) !default;
+$switch-height-lg: calc(#{$input-height-lg} * .8) !default;
+$switch-border-radius: $switch-height !default;
+$switch-bg: $custom-control-indicator-bg !default;
+$switch-checked-bg: map-get($theme-colors, 'primary') !default;
+$switch-disabled-bg: $custom-control-indicator-disabled-bg !default;
+$switch-disabled-color: $custom-control-description-disabled-color !default;
+$switch-thumb-bg: $white !default;
+$switch-thumb-border-radius: 50% !default;
+$switch-thumb-padding: 2px !default;
+$switch-focus-box-shadow: 0 0 0 $input-btn-focus-width rgba(map-get($theme-colors, 'primary'), .25);
+$switch-danger-focus-box-shadow: 0 0 0 $input-btn-focus-width rgba($danger, .25) ;
+$switch-transition: .2s all !default;
+
+.switch {
+  font-size: $font-size-base;
+  position: relative;
+
+  input {
+    position: absolute;
+    height: 1px;
+    width: 1px;
+    background: none;
+    border: 0;
+    clip: rect(0 0 0 0);
+    clip-path: inset(50%);
+    overflow: hidden;
+    padding: 0;
+
+    + label {
+      position: relative;
+      min-width: calc(#{$switch-height} * 2);
+      border-radius: $switch-border-radius;
+      height: $switch-height;
+      line-height: $switch-height;
+      display: inline-block;
+      cursor: pointer;
+      outline: none;
+      user-select: none;
+      vertical-align: middle;
+      text-indent: calc(calc(#{$switch-height} * 2) + .5rem);
+    }
+
+    + label::before,
+    + label::after {
+      content: '';
+      position: absolute;
+      top: 0;
+      left: 0;
+      width: calc(#{$switch-height} * 2);
+      bottom: 0;
+      display: block;
+    }
+
+    + label::before {
+      right: 0;
+      background-color: $switch-bg;
+      border-radius: $switch-border-radius;
+      transition: $switch-transition;
+    }
+
+    + label::after {
+      top: $switch-thumb-padding;
+      left: $switch-thumb-padding;
+      width: calc(#{$switch-height} - calc(#{$switch-thumb-padding} * 2));
+      height: calc(#{$switch-height} - calc(#{$switch-thumb-padding} * 2));
+      border-radius: $switch-thumb-border-radius;
+      background-color: $switch-thumb-bg;
+      transition: $switch-transition;
+    }
+
+    &:checked + label::before {
+      background-color: $switch-checked-bg;
+    }
+
+    &:checked + label::after {
+      margin-left: $switch-height;
+    }
+
+    &:focus + label::before {
+      outline: none;
+      box-shadow: $switch-focus-box-shadow;
+    }
+
+    &:disabled + label {
+      color: $switch-disabled-color;
+      cursor: not-allowed;
+    }
+
+    &:disabled + label::before {
+      background-color: $switch-disabled-bg;
+    }
+  }
+
+  // Small variation
+  &.switch-sm {
+    font-size: $font-size-sm;
+
+    input {
+      + label {
+        min-width: calc(#{$switch-height-sm} * 2);
+        height: $switch-height-sm;
+        line-height: $switch-height-sm;
+        text-indent: calc(calc(#{$switch-height-sm} * 2) + .5rem);
+      }
+
+      + label::before {
+        width: calc(#{$switch-height-sm} * 2);
+      }
+
+      + label::after {
+        width: calc(#{$switch-height-sm} - calc(#{$switch-thumb-padding} * 2));
+        height: calc(#{$switch-height-sm} - calc(#{$switch-thumb-padding} * 2));
+      }
+
+      &:checked + label::after {
+        margin-left: $switch-height-sm;
+      }
+    }
+  }
+
+  // Large variation
+  &.switch-lg {
+    font-size: $font-size-lg;
+
+    input {
+      + label {
+        min-width: calc(#{$switch-height-lg} * 2);
+        height: $switch-height-lg;
+        line-height: $switch-height-lg;
+        text-indent: calc(calc(#{$switch-height-lg} * 2) + .5rem);
+      }
+
+      + label::before {
+        width: calc(#{$switch-height-lg} * 2);
+      }
+
+      + label::after {
+        width: calc(#{$switch-height-lg} - calc(#{$switch-thumb-padding} * 2));
+        height: calc(#{$switch-height-lg} - calc(#{$switch-thumb-padding} * 2));
+      }
+
+      &:checked + label::after {
+        margin-left: $switch-height-lg;
+      }
+    }
+  }
+
+  + .switch {
+    margin-left: 1rem;
+  }
+}
+
+.switch.danger{
+  input {
+    &:checked + label::before {
+      background-color: $danger;
+    }
+
+    &:focus + label::before {
+      box-shadow: $switch-danger-focus-box-shadow;
+    }
+  }
+}
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