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Bootstrap/less/mixins.less

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//
// Mixins
// --------------------------------------------------
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// UTILITY MIXINS
// --------------------------------------------------
// Clearfix
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// --------
// For clearing floats like a boss h5bp.com/q
.clearfix() {
&:before,
&:after {
display: table;
content: "";
// Fixes Opera/contenteditable bug:
// http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
line-height: 0;
}
&:after {
clear: both;
}
}
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// Webkit-style focus
// ------------------
.tab-focus() {
// Default
outline: thin dotted #333;
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// Webkit
outline: 5px auto -webkit-focus-ring-color;
outline-offset: -2px;
}
// Center-align a block level element
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// ----------------------------------
.center-block() {
display: block;
margin-left: auto;
margin-right: auto;
}
// Sizing shortcuts
// -------------------------
.size(@width, @height) {
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;
}
}
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// 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;
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text-shadow: none;
background-color: transparent;
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border: 0;
}
// FONTS
// --------------------------------------------------
#font {
#family {
.serif() {
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font-family: @font-family-serif;
}
.sans-serif() {
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font-family: @font-family-sans-serif;
}
.monospace() {
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font-family: @font-family-monospace;
}
}
.shorthand(@size: @font-size-base, @weight: normal, @lineHeight: @line-height-base) {
font-size: @size;
font-weight: @weight;
line-height: @lineHeight;
}
.serif(@size: @font-size-base, @weight: normal, @lineHeight: @line-height-base) {
#font > #family > .serif;
#font > .shorthand(@size, @weight, @lineHeight);
}
.sans-serif(@size: @font-size-base, @weight: normal, @lineHeight: @line-height-base) {
#font > #family > .sans-serif;
#font > .shorthand(@size, @weight, @lineHeight);
}
.monospace(@size: @font-size-base, @weight: normal, @lineHeight: @line-height-base) {
#font > #family > .monospace;
#font > .shorthand(@size, @weight, @lineHeight);
}
}
// FORMS
// --------------------------------------------------
// Block level inputs
.input-block-level() {
display: block;
width: 100%;
}
// Mixin for form field states
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.formFieldState(@text-color: #555, @borderColor: #ccc, @backgroundColor: #f5f5f5) {
// Set the text color
.control-label,
.help-block,
.help-inline {
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color: @text-color;
}
// Style inputs accordingly
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.checkbox,
.radio,
input,
select,
textarea {
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color: @text-color;
}
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%);
@shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@borderColor, 20%);
.box-shadow(@shadow);
}
}
// Give a small background color for input-prepend/-append
.input-prepend .add-on,
.input-append .add-on {
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color: @text-color;
background-color: @backgroundColor;
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border-color: @text-color;
}
}
// CSS3 PROPERTIES
// --------------------------------------------------
// 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;
}
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.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);
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.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
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.box-shadow(@shadow) {
-webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
box-shadow: @shadow;
}
// Transitions
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.transition(@transition) {
-webkit-transition: @transition;
-moz-transition: @transition;
-o-transition: @transition;
transition: @transition;
}
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.transition-delay(@transition-delay) {
-webkit-transition-delay: @transition-delay;
-moz-transition-delay: @transition-delay;
-o-transition-delay: @transition-delay;
transition-delay: @transition-delay;
}
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// Transformations
.rotate(@degrees) {
-webkit-transform: rotate(@degrees);
-moz-transform: rotate(@degrees);
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-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) {
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-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) {
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-webkit-transform: skew(@x, @y);
-moz-transform: skew(@x, @y);
-ms-transform: skewX(@x) skewY(@y); // See https://github.com/twitter/bootstrap/issues/4885
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-o-transform: skew(@x, @y);
transform: skew(@x, @y);
-webkit-backface-visibility: hidden; // See https://github.com/twitter/bootstrap/issues/5319
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}
.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);
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}
// 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
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.background-clip(@clip) {
-webkit-background-clip: @clip;
-moz-background-clip: @clip;
background-clip: @clip;
}
// Background sizing
.background-size(@size) {
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-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;
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-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;
}
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// Optional hyphenation
.hyphens(@mode: auto) {
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word-wrap: break-word;
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-webkit-hyphens: @mode;
-moz-hyphens: @mode;
-ms-hyphens: @mode;
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-o-hyphens: @mode;
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hyphens: @mode;
}
// Opacity
.opacity(@opacity) {
opacity: @opacity / 100;
filter: ~"alpha(opacity=@{opacity})"; // IE8
}
// BACKGROUNDS
// --------------------------------------------------
// 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%);
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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+
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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(top, @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
}
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.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));
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background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
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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) {
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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) {
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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);
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}
}
// Reset filters for IE
.reset-filter() {
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filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
}
// COMPONENT MIXINS
// --------------------------------------------------
// Horizontal dividers
// -------------------------
// Dividers (basically an hr) within dropdowns and nav lists
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.nav-divider(@top: #e5e5e5, @bottom: #fff) {
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height: 1px;
margin: ((@line-height-base / 2) - 1) 1px; // 8px 1px
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overflow: hidden;
background-color: @top;
border-bottom: 1px solid @bottom;
}
// Button backgrounds
// ------------------
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.buttonBackground(@startColor, @endColor, @text-color: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
color: @text-color;
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text-shadow: @textShadow;
#gradient > .vertical(@startColor, @endColor);
border-color: @endColor @endColor darken(@endColor, 15%);
border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
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.reset-filter();
// in these cases the gradient won't cover the background, so we override
&:hover, &:active, &.active, &.disabled, &[disabled] {
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color: @text-color;
background-color: @endColor;
}
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// IE8 can't handle box-shadow to show active, so we darken a bit ourselves
&:active,
&.active {
background-color: darken(@endColor, 10%) e("\9");
}
}
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// 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;
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margin-left: auto;
.clearfix();
}
// Make a Grid
// Use .makeRow and .makeColumn to assign semantic layouts grid system behavior
.makeRow() {
margin-left: @gridGutterWidth * -1;
.clearfix();
}
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.makeColumn(@columns: 1, @offset: 0) {
float: left;
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margin-left: (@gridColumnWidth * @offset) + (@gridGutterWidth * (@offset - 1)) + (@gridGutterWidth * 2);
width: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1));
}
// The Grid
#grid {
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.core(@gridColumnWidth, @gridGutterWidth, @gridRowWidth) {
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.spanX(@index) when (@index > 0) {
(~".span@{index}") { .span(@index); }
.spanX(@index - 1);
}
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.spanX(0) {}
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.offsetX(@index) when (@index > 0) {
(~".offset@{index}") { .offset(@index); }
.offsetX(@index - 1);
}
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.offsetX(0) {}
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// Base styles
.offset(@columns) {
margin-left: percentage(@columns / @gridColumns);
}
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.span(@columns) {
width: percentage(@columns / @gridColumns);
}
.row {
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// Negative indent the columns so text lines up
margin-left: @gridGutterWidth / -2;
margin-right: @gridGutterWidth / -2;
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// Clear the floated columns
.clearfix();
}
[class*="span"] {
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float: left; // Collapse whitespace
min-height: 1px; // Prevent empty columns from collapsing
padding-left: @gridGutterWidth / 2;
padding-right: @gridGutterWidth / 2;
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// Proper box-model (padding doesnt' add to width)
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
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// Generate .spanX and .offsetX
.spanX(@gridColumns);
.offsetX(@gridColumns);
}
.input(@gridColumnWidth, @gridGutterWidth, @gridRowWidth) {
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.spanX(@index) when (@index > 0) {
(~"input.span@{index}, textarea.span@{index}, select.span@{index}, .uneditable-input.span@{index}") { .span(@index); }
.spanX(@index - 1);
}
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.spanX(0) {}
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.offsetX(@index) when (@index > 0) {
(~"input.offset@{index}, textarea.offset@{index}, select.offset@{index}, uneditable-input.offset@{index}") { .offset(@index); }
.offsetX(@index - 1);
}
.offsetX(0) {}
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.span(@columns) {
// TODO: Figure out how to add this back behind a class
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// Part 1: Since inputs require padding *and* margin, we subtract the grid gutter width, as a percent of the row, from the default column width.
//width: percentage(@columns / @gridColumns) - percentage(@gridGutterWidth / @gridRowWidth);
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// Part 2: That subtracted width then gets split in half and added to the left and right margins.
// margin-left: percentage((@gridGutterWidth / 2) / @gridRowWidth);
// margin-right: percentage((@gridGutterWidth / 2) / @gridRowWidth);
}
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.offset(@columns) {
// Take the normal offset margin and add an extra gutter's worth.
margin-left: percentage(@columns / @gridColumns) + percentage((@gridGutterWidth / 2) / @gridRowWidth);
}
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// Generate .spanX and .offsetX
.spanX(@gridColumns);
.offsetX(@gridColumns);
}
}