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// Framework grid generation
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//
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// Used only by Bootstrap to generate the correct number of grid classes given
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// any value of `@grid-columns`.
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.make-grid-columns() {
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// Common styles for all sizes of grid columns, widths 1-12
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.col(@index) when (@index = 1) { // initial
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@item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
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.col((@index + 1), @item);
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}
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.col(@index, @list) when (@index =< @grid-columns) { // general; "=<" isn't a typo
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@item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
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.col((@index + 1), ~"@{list}, @{item}");
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}
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.col(@index, @list) when (@index > @grid-columns) { // terminal
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@{list} {
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position: relative;
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// Prevent columns from collapsing when empty
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min-height: 1px;
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// Inner gutter via padding
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padding-left: (@grid-gutter-width / 2);
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padding-right: (@grid-gutter-width / 2);
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}
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}
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.col(1); // kickstart it
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}
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.float-grid-columns(@class) {
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.col(@index) when (@index = 1) { // initial
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@item: ~".col-@{class}-@{index}";
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.col((@index + 1), @item);
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}
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.col(@index, @list) when (@index =< @grid-columns) { // general
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@item: ~".col-@{class}-@{index}";
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.col((@index + 1), ~"@{list}, @{item}");
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}
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.col(@index, @list) when (@index > @grid-columns) { // terminal
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@{list} {
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float: left;
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}
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}
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.col(1); // kickstart it
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}
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.calc-grid-column(@index, @class, @type) when (@type = width) and (@index > 0) {
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.col-@{class}-@{index} {
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width: percentage((@index / @grid-columns));
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}
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}
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.calc-grid-column(@index, @class, @type) when (@type = push) and (@index > 0) {
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.col-@{class}-push-@{index} {
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left: percentage((@index / @grid-columns));
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}
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}
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.calc-grid-column(@index, @class, @type) when (@type = push) and (@index = 0) {
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.col-@{class}-push-0 {
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left: auto;
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}
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}
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.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index > 0) {
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.col-@{class}-pull-@{index} {
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right: percentage((@index / @grid-columns));
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}
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}
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.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index = 0) {
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.col-@{class}-pull-0 {
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right: auto;
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}
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}
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.calc-grid-column(@index, @class, @type) when (@type = offset) {
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.col-@{class}-offset-@{index} {
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margin-left: percentage((@index / @grid-columns));
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}
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}
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// Basic looping in LESS
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.loop-grid-columns(@index, @class, @type) when (@index >= 0) {
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.calc-grid-column(@index, @class, @type);
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// next iteration
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.loop-grid-columns((@index - 1), @class, @type);
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}
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// Create grid for specific class
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.make-grid(@class) {
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.float-grid-columns(@class);
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.loop-grid-columns(@grid-columns, @class, width);
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.loop-grid-columns(@grid-columns, @class, pull);
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.loop-grid-columns(@grid-columns, @class, push);
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.loop-grid-columns(@grid-columns, @class, offset);
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}
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