app/assets/css/lib/mixins.less
//
// Mixins
// --------------------------------------------------
// UTILITY MIXINS
// --------------------------------------------------
// Clearfix
// --------
// For clearing floats like a boss h5bp.com/q
.clearfix {
*zoom: 1;
&:before,
&:after {
display: table;
content: "";
// Fixes Opera/contenteditable bug:
// http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
line-height: 0;
}
&:after {
clear: both;
}
}
// Webkit-style focus
// ------------------
.tab-focus() {
// Default
outline: thin dotted #333;
// Webkit
outline: 5px auto -webkit-focus-ring-color;
outline-offset: -2px;
}
// Center-align a block level element
// ----------------------------------
.center-block() {
display: block;
margin-left: auto;
margin-right: auto;
}
// IE7 inline-block
// ----------------
.ie7-inline-block() {
*display: inline; /* IE7 inline-block hack */
*zoom: 1;
}
// IE7 likes to collapse whitespace on either side of the inline-block elements.
// Ems because we're attempting to match the width of a space character. Left
// version is for form buttons, which typically come after other elements, and
// right version is for icons, which come before. Applying both is ok, but it will
// mean that space between those elements will be .6em (~2 space characters) in IE7,
// instead of the 1 space in other browsers.
.ie7-restore-left-whitespace() {
*margin-left: .3em;
&:first-child {
*margin-left: 0;
}
}
.ie7-restore-right-whitespace() {
*margin-right: .3em;
}
// Sizing shortcuts
// -------------------------
.size(@height, @width) {
width: @width;
height: @height;
}
.square(@size) {
.size(@size, @size);
}
// Placeholder text
// -------------------------
.placeholder(@color: @placeholderText) {
&:-moz-placeholder {
color: @color;
}
&:-ms-input-placeholder {
color: @color;
}
&::-webkit-input-placeholder {
color: @color;
}
}
// Text overflow
// -------------------------
// Requires inline-block or block for proper styling
.text-overflow() {
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
// CSS image replacement
// -------------------------
// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
.hide-text {
font: 0/0 a;
color: transparent;
text-shadow: none;
background-color: transparent;
border: 0;
}
// FONTS
// --------------------------------------------------
#font {
#family {
.serif() {
font-family: @serifFontFamily;
}
.sans-serif() {
font-family: @sansFontFamily;
}
.monospace() {
font-family: @monoFontFamily;
}
}
.shorthand(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
font-size: @size;
font-weight: @weight;
line-height: @lineHeight;
}
.serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
#font > #family > .serif;
#font > .shorthand(@size, @weight, @lineHeight);
}
.sans-serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
#font > #family > .sans-serif;
#font > .shorthand(@size, @weight, @lineHeight);
}
.monospace(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
#font > #family > .monospace;
#font > .shorthand(@size, @weight, @lineHeight);
}
}
// FORMS
// --------------------------------------------------
// Block level inputs
.input-block-level {
display: block;
width: 100%;
min-height: 30px; // Make inputs at least the height of their button counterpart
.box-sizing(border-box); // Makes inputs behave like true block-level elements
}
// Mixin for form field states
.formFieldState(@textColor: #555, @borderColor: #ccc, @backgroundColor: #f5f5f5) {
// Set the text color
> label,
.help-block,
.help-inline {
color: @textColor;
}
// Style inputs accordingly
.checkbox,
.radio,
input,
select,
textarea {
color: @textColor;
}
input,
select,
textarea {
border-color: @borderColor;
.box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
&:focus {
border-color: darken(@borderColor, 10%);
.box-shadow(inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@borderColor, 20%));
}
}
// Give a small background color for input-prepend/-append
.input-prepend .add-on,
.input-append .add-on {
color: @textColor;
background-color: @backgroundColor;
border-color: @textColor;
}
}
// CSS3 PROPERTIES
// --------------------------------------------------
// Border Radius
.border-radius(@radius) {
-webkit-border-radius: @radius;
-moz-border-radius: @radius;
border-radius: @radius;
}
// Single Corner Border Radius
.border-top-left-radius(@radius) {
-webkit-border-top-left-radius: @radius;
-moz-border-radius-topleft: @radius;
border-top-left-radius: @radius;
}
.border-top-right-radius(@radius) {
-webkit-border-top-right-radius: @radius;
-moz-border-radius-topright: @radius;
border-top-right-radius: @radius;
}
.border-bottom-right-radius(@radius) {
-webkit-border-bottom-right-radius: @radius;
-moz-border-radius-bottomright: @radius;
border-bottom-right-radius: @radius;
}
.border-bottom-left-radius(@radius) {
-webkit-border-bottom-left-radius: @radius;
-moz-border-radius-bottomleft: @radius;
border-bottom-left-radius: @radius;
}
// Single Side Border Radius
.border-top-radius(@radius) {
.border-top-right-radius(@radius);
.border-top-left-radius(@radius);
}
.border-right-radius(@radius) {
.border-top-right-radius(@radius);
.border-bottom-right-radius(@radius);
}
.border-bottom-radius(@radius) {
.border-bottom-right-radius(@radius);
.border-bottom-left-radius(@radius);
}
.border-left-radius(@radius) {
.border-top-left-radius(@radius);
.border-bottom-left-radius(@radius);
}
// Drop shadows
.box-shadow(@shadowA, @shadowB:X, ...){
// Multiple shadow solution from http://toekneestuck.com/blog/2012/05/15/less-css-arguments-variable/
@props: ~`"@{arguments}".replace(/[\[\]]|\,\sX/g, '')`;
-webkit-box-shadow: @props;
-moz-box-shadow: @props;
box-shadow: @props;
}
// Transitions
.transition(@transition) {
-webkit-transition: @transition;
-moz-transition: @transition;
-o-transition: @transition;
transition: @transition;
}
.transition-delay(@transition-delay) {
-webkit-transition-delay: @transition-delay;
-moz-transition-delay: @transition-delay;
-o-transition-delay: @transition-delay;
transition-delay: @transition-delay;
}
// Transformations
.rotate(@degrees) {
-webkit-transform: rotate(@degrees);
-moz-transform: rotate(@degrees);
-ms-transform: rotate(@degrees);
-o-transform: rotate(@degrees);
transform: rotate(@degrees);
}
.scale(@ratio) {
-webkit-transform: scale(@ratio);
-moz-transform: scale(@ratio);
-ms-transform: scale(@ratio);
-o-transform: scale(@ratio);
transform: scale(@ratio);
}
.translate(@x, @y) {
-webkit-transform: translate(@x, @y);
-moz-transform: translate(@x, @y);
-ms-transform: translate(@x, @y);
-o-transform: translate(@x, @y);
transform: translate(@x, @y);
}
.skew(@x, @y) {
-webkit-transform: skew(@x, @y);
-moz-transform: skew(@x, @y);
-ms-transform: skewX(@x) skewY(@y); // See https://github.com/twitter/bootstrap/issues/4885
-o-transform: skew(@x, @y);
transform: skew(@x, @y);
}
.translate3d(@x, @y, @z) {
-webkit-transform: translate3d(@x, @y, @z);
-moz-transform: translate3d(@x, @y, @z);
-o-transform: translate3d(@x, @y, @z);
transform: translate3d(@x, @y, @z);
}
// Backface visibility
// Prevent browsers from flickering when using CSS 3D transforms.
// Default value is `visible`, but can be changed to `hidden
// See git pull https://github.com/dannykeane/bootstrap.git backface-visibility for examples
.backface-visibility(@visibility){
-webkit-backface-visibility: @visibility;
-moz-backface-visibility: @visibility;
backface-visibility: @visibility;
}
// Background clipping
// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
.background-clip(@clip) {
-webkit-background-clip: @clip;
-moz-background-clip: @clip;
background-clip: @clip;
}
// Background sizing
.background-size(@size){
-webkit-background-size: @size;
-moz-background-size: @size;
-o-background-size: @size;
background-size: @size;
}
// Box sizing
.box-sizing(@boxmodel) {
-webkit-box-sizing: @boxmodel;
-moz-box-sizing: @boxmodel;
box-sizing: @boxmodel;
}
// User select
// For selecting text on the page
.user-select(@select) {
-webkit-user-select: @select;
-moz-user-select: @select;
-ms-user-select: @select;
-o-user-select: @select;
user-select: @select;
}
// Resize anything
.resizable(@direction) {
resize: @direction; // Options: horizontal, vertical, both
overflow: auto; // Safari fix
}
// CSS3 Content Columns
.content-columns(@columnCount, @columnGap: @gridGutterWidth) {
-webkit-column-count: @columnCount;
-moz-column-count: @columnCount;
column-count: @columnCount;
-webkit-column-gap: @columnGap;
-moz-column-gap: @columnGap;
column-gap: @columnGap;
}
// Optional hyphenation
.hyphens(@mode: auto) {
word-wrap: break-word;
-webkit-hyphens: @mode;
-moz-hyphens: @mode;
-ms-hyphens: @mode;
-o-hyphens: @mode;
hyphens: @mode;
}
// Opacity
.opacity(@opacity) {
opacity: @opacity / 100;
filter: ~"alpha(opacity=@{opacity})";
}
// BACKGROUNDS
// --------------------------------------------------
// Add an alphatransparency value to any background or border color (via Elyse Holladay)
#translucent {
.background(@color: @white, @alpha: 1) {
background-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
}
.border(@color: @white, @alpha: 1) {
border-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
.background-clip(padding-box);
}
}
// Gradient Bar Colors for buttons and alerts
.gradientBar(@primaryColor, @secondaryColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
color: @textColor;
text-shadow: @textShadow;
#gradient > .vertical(@primaryColor, @secondaryColor);
border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
}
// Gradients
#gradient {
.horizontal(@startColor: #555, @endColor: #333) {
background-color: @endColor;
background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(to right, @startColor, @endColor); // Standard, IE10
background-repeat: repeat-x;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@startColor),argb(@endColor))); // IE9 and down
}
.vertical(@startColor: #555, @endColor: #333) {
background-color: mix(@startColor, @endColor, 60%);
background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(to bottom, @startColor, @endColor); // Standard, IE10
background-repeat: repeat-x;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down
}
.directional(@startColor: #555, @endColor: #333, @deg: 45deg) {
background-color: @endColor;
background-repeat: repeat-x;
background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(@deg, @startColor, @endColor); // Standard, IE10
}
.vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
background-color: mix(@midColor, @endColor, 80%);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-repeat: no-repeat;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
}
.radial(@innerColor: #555, @outerColor: #333) {
background-color: @outerColor;
background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
background-repeat: no-repeat;
}
.striped(@color: #555, @angle: 45deg) {
background-color: @color;
background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255,255,255,.15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255,255,255,.15)), color-stop(.75, rgba(255,255,255,.15)), color-stop(.75, transparent), to(transparent));
background-image: -webkit-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: -moz-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: -o-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
}
}
// Reset filters for IE
.reset-filter() {
filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
}
// COMPONENT MIXINS
// --------------------------------------------------
// Horizontal dividers
// -------------------------
// Dividers (basically an hr) within dropdowns and nav lists
.nav-divider(@top: #e5e5e5, @bottom: @white) {
// IE7 needs a set width since we gave a height. Restricting just
// to IE7 to keep the 1px left/right space in other browsers.
// It is unclear where IE is getting the extra space that we need
// to negative-margin away, but so it goes.
*width: 100%;
height: 1px;
margin: ((@baseLineHeight / 2) - 1) 1px; // 8px 1px
*margin: -5px 0 5px;
overflow: hidden;
background-color: @top;
border-bottom: 1px solid @bottom;
}
// Button backgrounds
// ------------------
.buttonBackground(@startColor, @endColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
// gradientBar will set the background to a pleasing blend of these, to support IE<=9
.gradientBar(@startColor, @endColor, @textColor, @textShadow);
*background-color: @endColor; /* Darken IE7 buttons by default so they stand out more given they won't have borders */
.reset-filter();
// in these cases the gradient won't cover the background, so we override
&:hover, &:active, &.active, &.disabled, &[disabled] {
color: @textColor;
background-color: @endColor;
*background-color: darken(@endColor, 5%);
}
// IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
&:active,
&.active {
background-color: darken(@endColor, 10%) e("\9");
}
}
// Navbar vertical align
// -------------------------
// Vertically center elements in the navbar.
// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
.navbarVerticalAlign(@elementHeight) {
margin-top: (@navbarHeight - @elementHeight) / 2;
}
// Grid System
// -----------
// Centered container element
.container-fixed() {
margin-right: auto;
margin-left: auto;
.clearfix();
}
// Table columns
.tableColumns(@columnSpan: 1) {
float: none; // undo default grid column styles
width: ((@gridColumnWidth) * @columnSpan) + (@gridGutterWidth * (@columnSpan - 1)) - 16; // 16 is total padding on left and right of table cells
margin-left: 0; // undo default grid column styles
}
// Make a Grid
// Use .makeRow and .makeColumn to assign semantic layouts grid system behavior
.makeRow() {
margin-left: @gridGutterWidth * -1;
.clearfix();
}
.makeColumn(@columns: 1, @offset: 0) {
float: left;
margin-left: (@gridColumnWidth * @offset) + (@gridGutterWidth * (@offset - 1)) + (@gridGutterWidth * 2);
width: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1));
}
// The Grid
#grid {
.core (@gridColumnWidth, @gridGutterWidth) {
.spanX (@index) when (@index > 0) {
(~".span@{index}") { .span(@index); }
.spanX(@index - 1);
}
.spanX (0) {}
.offsetX (@index) when (@index > 0) {
(~".offset@{index}") { .offset(@index); }
.offsetX(@index - 1);
}
.offsetX (0) {}
.offset (@columns) {
margin-left: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns + 1));
}
.span (@columns) {
width: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1));
}
.row {
margin-left: @gridGutterWidth * -1;
.clearfix();
}
[class*="span"] {
float: left;
min-height: 1px; // prevent collapsing columns
margin-left: @gridGutterWidth;
}
// Set the container width, and override it for fixed navbars in media queries
.container,
.navbar-static-top .container,
.navbar-fixed-top .container,
.navbar-fixed-bottom .container { .span(@gridColumns); }
// generate .spanX and .offsetX
.spanX (@gridColumns);
.offsetX (@gridColumns);
}
.fluid (@fluidGridColumnWidth, @fluidGridGutterWidth) {
.spanX (@index) when (@index > 0) {
(~".span@{index}") { .span(@index); }
.spanX(@index - 1);
}
.spanX (0) {}
.offsetX (@index) when (@index > 0) {
(~'.offset@{index}') { .offset(@index); }
(~'.offset@{index}:first-child') { .offsetFirstChild(@index); }
.offsetX(@index - 1);
}
.offsetX (0) {}
.offset (@columns) {
margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth*2);
*margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%) + (@fluidGridGutterWidth*2) - (.5 / @gridRowWidth * 100 * 1%);
}
.offsetFirstChild (@columns) {
margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth);
*margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%) + @fluidGridGutterWidth - (.5 / @gridRowWidth * 100 * 1%);
}
.span (@columns) {
width: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1));
*width: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%);
}
.row-fluid {
width: 100%;
.clearfix();
[class*="span"] {
.input-block-level();
float: left;
margin-left: @fluidGridGutterWidth;
*margin-left: @fluidGridGutterWidth - (.5 / @gridRowWidth * 100 * 1%);
}
[class*="span"]:first-child {
margin-left: 0;
}
// generate .spanX and .offsetX
.spanX (@gridColumns);
.offsetX (@gridColumns);
}
}
.input(@gridColumnWidth, @gridGutterWidth) {
.spanX (@index) when (@index > 0) {
(~"input.span@{index}, textarea.span@{index}, .uneditable-input.span@{index}") { .span(@index); }
.spanX(@index - 1);
}
.spanX (0) {}
.span(@columns) {
width: ((@gridColumnWidth) * @columns) + (@gridGutterWidth * (@columns - 1)) - 14;
}
input,
textarea,
.uneditable-input {
margin-left: 0; // override margin-left from core grid system
}
// Space grid-sized controls properly if multiple per line
.controls-row [class*="span"] + [class*="span"] {
margin-left: @gridGutterWidth;
}
// generate .spanX
.spanX (@gridColumns);
}
}