//
// Button groups
// --------------------------------------------------

// Make the div behave like a button
.btn-group,
.btn-group-vertical {
    position: relative;
    display: inline-block;
    vertical-align: middle; // match .btn alignment given font-size hack above
    > .btn {
        position: relative;
        float: left;
        // Bring the "active" button to the front
        &:hover,
        &:focus,
        &:active,
        &.active {
            z-index: 2;
        }
    }
}

// Prevent double borders when buttons are next to each other
.btn-group {
    .btn + .btn,
    .btn + .btn-group,
    .btn-group + .btn,
    .btn-group + .btn-group {
        margin-left: -1px;
    }
}

// Optional: Group multiple button groups together for a toolbar
.btn-toolbar {
    margin-left: -5px; // Offset the first child's margin
    @include clearfix;

    .btn,
    .btn-group,
    .input-group {
        float: left;
    }
    > .btn,
    > .btn-group,
    > .input-group {
        margin-left: 5px;
    }
}

.btn-group > .btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
    border-radius: 0;
}

// Set corners individual because sometimes a single button can be in a .btn-group and we need :first-child and :last-child to both match
.btn-group > .btn:first-child {
    margin-left: 0;
    &:not(:last-child):not(.dropdown-toggle) {
        @include border-right-radius(0);
    }
}
// Need .dropdown-toggle since :last-child doesn't apply given a .dropdown-menu immediately after it
.btn-group > .btn:last-child:not(:first-child),
.btn-group > .dropdown-toggle:not(:first-child) {
    @include border-left-radius(0);
}

// Custom edits for including btn-groups within btn-groups (useful for including dropdown buttons within a btn-group)
.btn-group > .btn-group {
    float: left;
}
.btn-group > .btn-group:not(:first-child):not(:last-child) > .btn {
    border-radius: 0;
}
.btn-group > .btn-group:first-child:not(:last-child) {
    > .btn:last-child,
    > .dropdown-toggle {
        @include border-right-radius(0);
    }
}
.btn-group > .btn-group:last-child:not(:first-child) > .btn:first-child {
    @include border-left-radius(0);
}

// On active and open, don't show outline
.btn-group .dropdown-toggle:active,
.btn-group.open .dropdown-toggle {
    outline: 0;
}

// Sizing
//
// Remix the default button sizing classes into new ones for easier manipulation.

.btn-group-xs > .btn {
    @extend .btn-xs;
}
.btn-group-sm > .btn {
    @extend .btn-sm;
}
.btn-group-lg > .btn {
    @extend .btn-lg;
}

// Split button dropdowns
// ----------------------

// Give the line between buttons some depth
.btn-group > .btn + .dropdown-toggle {
    padding-left: 8px;
    padding-right: 8px;
}
.btn-group > .btn-lg + .dropdown-toggle {
    padding-left: 12px;
    padding-right: 12px;
}

// The clickable button for toggling the menu
// Remove the gradient and set the same inset shadow as the :active state
.btn-group.open .dropdown-toggle {
    @include box-shadow(inset 0 3px 5px rgba(0, 0, 0, 0.125));

    // Show no shadow for `.btn-link` since it has no other button styles.
    &.btn-link {
        @include box-shadow(none);
    }
}

// Reposition the caret
.btn .caret {
    margin-left: 0;
}
// Carets in other button sizes
.btn-lg .caret {
    border-width: $caret-width-large $caret-width-large 0;
    border-bottom-width: 0;
}
// Upside down carets for .dropup
.dropup .btn-lg .caret {
    border-width: 0 $caret-width-large $caret-width-large;
}

// Vertical button groups
// ----------------------

.btn-group-vertical {
    > .btn,
    > .btn-group,
    > .btn-group > .btn {
        display: block;
        float: none;
        width: 100%;
        max-width: 100%;
    }

    // Clear floats so dropdown menus can be properly placed
    > .btn-group {
        @include clearfix;
        > .btn {
            float: none;
        }
    }

    > .btn + .btn,
    > .btn + .btn-group,
    > .btn-group + .btn,
    > .btn-group + .btn-group {
        margin-top: -1px;
        margin-left: 0;
    }
}

.btn-group-vertical > .btn {
    &:not(:first-child):not(:last-child) {
        border-radius: 0;
    }
    &:first-child:not(:last-child) {
        border-top-right-radius: $btn-border-radius-base;
        @include border-bottom-radius(0);
    }
    &:last-child:not(:first-child) {
        border-bottom-left-radius: $btn-border-radius-base;
        @include border-top-radius(0);
    }
}
.btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
    border-radius: 0;
}
.btn-group-vertical > .btn-group:first-child:not(:last-child) {
    > .btn:last-child,
    > .dropdown-toggle {
        @include border-bottom-radius(0);
    }
}
.btn-group-vertical
    > .btn-group:last-child:not(:first-child)
    > .btn:first-child {
    @include border-top-radius(0);
}

// Justified button groups
// ----------------------

.btn-group-justified {
    display: table;
    width: 100%;
    table-layout: fixed;
    border-collapse: separate;
    > .btn,
    > .btn-group {
        float: none;
        display: table-cell;
        width: 1%;
    }
    > .btn-group .btn {
        width: 100%;
    }

    > .btn-group .dropdown-menu {
        left: auto;
    }
}

// Checkbox and radio options
//
// In order to support the browser's form validation feedback, powered by the
// `required` attribute, we have to "hide" the inputs via `clip`. We cannot use
// `display: none;` or `visibility: hidden;` as that also hides the popover.
// Simply visually hiding the inputs via `opacity` would leave them clickable in
// certain cases which is prevented by using `clip` and `pointer-events`.
// This way, we ensure a DOM element is visible to position the popover from.
//
// See https://github.com/twbs/bootstrap/pull/12794 and
// https://github.com/twbs/bootstrap/pull/14559 for more information.

[data-toggle='buttons'] {
    > .btn,
    > .btn-group > .btn {
        input[type='radio'],
        input[type='checkbox'] {
            position: absolute;
            clip: rect(0, 0, 0, 0);
            //      pointer-events: none;
        }
    }
}
