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vendor/Fmt/doc/bootstrap/mixins/forms.less

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+// Form validation states
+//
+// Used in forms.less to generate the form validation CSS for warnings, errors,
+// and successes.
+
+.form-control-validation(@text-color: #555; @border-color: #ccc; @background-color: #f5f5f5) {
+  // Color the label and help text
+  .help-block,
+  .control-label,
+  .radio,
+  .checkbox,
+  .radio-inline,
+  .checkbox-inline,
+  &.radio label,
+  &.checkbox label,
+  &.radio-inline label,
+  &.checkbox-inline label  {
+    color: @text-color;
+  }
+  // Set the border and box shadow on specific inputs to match
+  .form-control {
+    border-color: @border-color;
+    .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
+    &:focus {
+      border-color: darken(@border-color, 10%);
+      @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@border-color, 20%);
+      .box-shadow(@shadow);
+    }
+  }
+  // Set validation states also for addons
+  .input-group-addon {
+    color: @text-color;
+    border-color: @border-color;
+    background-color: @background-color;
+  }
+  // Optional feedback icon
+  .form-control-feedback {
+    color: @text-color;
+  }
+}
+
+
+// Form control focus state
+//
+// Generate a customized focus state and for any input with the specified color,
+// which defaults to the `@input-border-focus` variable.
+//
+// We highly encourage you to not customize the default value, but instead use
+// this to tweak colors on an as-needed basis. This aesthetic change is based on
+// WebKit's default styles, but applicable to a wider range of browsers. Its
+// usability and accessibility should be taken into account with any change.
+//
+// Example usage: change the default blue border and shadow to white for better
+// contrast against a dark gray background.
+.form-control-focus(@color: @input-border-focus) {
+  @color-rgba: rgba(red(@color), green(@color), blue(@color), .6);
+  &:focus {
+    border-color: @color;
+    outline: 0;
+    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
+  }
+}
+
+// Form control sizing
+//
+// Relative text size, padding, and border-radii changes for form controls. For
+// horizontal sizing, wrap controls in the predefined grid classes. `<select>`
+// element gets special love because it's special, and that's a fact!
+.input-size(@input-height; @padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
+  height: @input-height;
+  padding: @padding-vertical @padding-horizontal;
+  font-size: @font-size;
+  line-height: @line-height;
+  border-radius: @border-radius;
+
+  select& {
+    height: @input-height;
+    line-height: @input-height;
+  }
+
+  textarea&,
+  select[multiple]& {
+    height: auto;
+  }
+}