//
// Dropdown menus
// --------------------------------------------------

// Dropdown arrow/caret
.caret {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 2px;
    vertical-align: middle;
    border-top: $caret-width-base dashed;
    //border-top:   $caret-width-base solid \9; // IE8
    border-right: $caret-width-base solid transparent;
    border-left: $caret-width-base solid transparent;
}

// The dropdown wrapper (div)
.dropup,
.dropdown {
    position: relative;
}

// Prevent the focus on the dropdown toggle when closing dropdowns
.dropdown-toggle:focus {
    outline: 0;
}

// The dropdown menu (ul)
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: $zindex-dropdown;
    display: none; // none by default, but block on "open" of the menu
    float: left;
    min-width: 160px;
    padding: 5px 0;
    margin: 2px 0 0; // override default ul
    list-style: none;
    font-size: $font-size-base;
    text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
    background-color: $dropdown-bg;
    border: 1px solid $dropdown-fallback-border; // IE8 fallback
    border: 1px solid $dropdown-border;
    border-radius: $border-radius-base;
    @include box-shadow(0 6px 12px rgba(0, 0, 0, 0.175));
    background-clip: padding-box;

    // Aligns the dropdown menu to right
    //
    // Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`
    &.pull-right {
        right: 0;
        left: auto;
    }

    // Dividers (basically an hr) within the dropdown
    .divider {
        @include nav-divider($dropdown-divider-bg);
    }

    // Links within the dropdown menu
    > li > a {
        display: block;
        padding: 3px 20px;
        clear: both;
        font-weight: normal;
        line-height: $line-height-base;
        color: $dropdown-link-color;
        white-space: nowrap; // prevent links from randomly breaking onto new lines
    }
}

// Hover/Focus state
.dropdown-menu > li > a {
    &:hover,
    &:focus {
        text-decoration: none;
        color: $dropdown-link-hover-color;
        background-color: $dropdown-link-hover-bg;
    }
}

// Active state
.dropdown-menu > .active > a {
    &,
    &:hover,
    &:focus {
        color: $dropdown-link-active-color;
        text-decoration: none;
        outline: 0;
        background-color: $dropdown-link-active-bg;
    }
}

// Disabled state
//
// Gray out text and ensure the hover/focus state remains gray

.dropdown-menu > .disabled > a {
    &,
    &:hover,
    &:focus {
        color: $dropdown-link-disabled-color;
    }

    // Nuke hover/focus effects
    &:hover,
    &:focus {
        text-decoration: none;
        background-color: transparent;
        background-image: none; // Remove CSS gradient
        @include reset-filter;
        cursor: $cursor-disabled;
    }
}

// Open state for the dropdown
.open {
    // Show the menu
    > .dropdown-menu {
        display: block;
    }

    // Remove the outline when :focus is triggered
    > a {
        outline: 0;
    }
}

// Menu positioning
//
// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
// menu with the parent.
.dropdown-menu-right {
    left: auto; // Reset the default from `.dropdown-menu`
    right: 0;
}
// With v3, we enabled auto-flipping if you have a dropdown within a right
// aligned nav component. To enable the undoing of that, we provide an override
// to restore the default dropdown menu alignment.
//
// This is only for left-aligning a dropdown menu within a `.navbar-right` or
// `.pull-right` nav component.
.dropdown-menu-left {
    left: 0;
    right: auto;
}

// Dropdown section headers
.dropdown-header {
    display: block;
    padding: 3px 20px;
    font-size: $font-size-small;
    line-height: $line-height-base;
    color: $dropdown-header-color;
    white-space: nowrap; // as with > li > a
}

// Backdrop to catch body clicks on mobile, etc.
.dropdown-backdrop {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    z-index: ($zindex-dropdown - 10);
}

// Right aligned dropdowns
.pull-right > .dropdown-menu {
    right: 0;
    left: auto;
}

// Allow for dropdowns to go bottom up (aka, dropup-menu)
//
// Just add .dropup after the standard .dropdown class and you're set, bro.
// TODO: abstract this so that the navbar fixed styles are not placed here?

.dropup,
.navbar-fixed-bottom .dropdown {
    // Reverse the caret
    .caret {
        border-top: 0;
        border-bottom: $caret-width-base dashed;
        //border-bottom: $caret-width-base solid \9; // IE8
        content: '';
    }
    // Different positioning for bottom up menu
    .dropdown-menu {
        top: auto;
        bottom: 100%;
        margin-bottom: 2px;
    }
}

// Component alignment
//
// Reiterate per navbar.less and the modified component alignment there.

@media (min-width: $grid-float-breakpoint) {
    .navbar-right {
        .dropdown-menu {
            right: 0;
            left: auto;
        }
        // Necessary for overrides of the default right aligned menu.
        // Will remove come v4 in all likelihood.
        .dropdown-menu-left {
            left: 0;
            right: auto;
        }
    }
}
