silverstripe-framework/admin/scss/_mixins.scss

//**
// * This file contains generic mixins which we use throughout
// * the admin panels.
// *
// * Mixins should be stored here rather than individual files
// * so that we can keep.
// */

//** ----------------------------------------------------
// * Hides the overflowing text from a container
// *
// * Note: you must define a width on the element with this
// * overflow.
// * ----------------------------------------------------- */
@mixin hide-text-overflow {
	overflow: hidden;
	white-space: nowrap;
	
	// could optionally use the compass mixin but that
	// would require a 3rd party plugin
	text-overflow: ellipsis;
	-o-text-overflow: ellipsis;
}

@mixin box-shadow-none{
	-moz-box-shadow: none;
	-webkit-box-shadow: none;
    box-shadow: none;
}


//**----------------------------------------------------
//Clearfix mixin clears the float of it's parent element
//----------------------------------------------------**/
@mixin clearfix{
	&:after{
		content: ".";
		display: block;
		height: 0;
		clear: both;
		visibility: hidden;
	}
	*:first-child &{ zoom:1;}
}



//** ----------------------------------------------------
// * Clear the properties of sub form fields. 
// *
// * Often needed for nested form fields and 
// * ----------------------------------------------------- */
@mixin clear-form-field-styles {
	.field {
		padding: 0;
		border: 0;
	}

	label {
		float: none;
		width: auto;

		&.left {
			float: none;
			display: inherit;
			width: auto;
			padding: 0;
			line-height: inherit;
		}
	}

	.middleColumn {
		margin-left: 0;
	}

	input.text,
	textarea,
	select,
	.TreeDropdownField {
		width: auto;
		max-width: auto;
	}
}

//** ----------------------------------------------------
// * Double tone borders
// *
// * http://daverupert.com/2011/06/two-tone-borders-with-css3/
// * ----------------------------------------------------- */
@mixin doubleborder($side, $innerColor, $outerColor) {
    $shadow: "0 0 0";
    border-#{$side}: 1px solid $innerColor;
    @if ($side == "top") { $shadow: 0 -1px 0; }
    @if ($side == "right") { $shadow: 1px 0 0; }
    @if ($side == "bottom") { $shadow: 0 1px 0; }
    @if ($side == "left") { $shadow: -1px 0 0; }
    -webkit-box-shadow: $shadow $outerColor;
    -moz-box-shadow: $shadow $outerColor;
    -o-box-shadow: $shadow $outerColor;
    box-shadow: $shadow $outerColor;
}


@mixin transition($properties: margin 0.3s ease-in 0s){
   	-moz-transition: $properties; 
	-webkit-transition: $properties;
	-o-transition: $properties; 
	transition: $properties;
}