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

// Dropdown arrow/caret
.caret {
    display: inline-block;
    margin-left: 2px;

    &:before {
        font-family: 'RSuiteIconFont' !important;
        content: "\F107";
    }
}

// The dropdown wrapper (div)
.dropup,
.dropdown {
    position: relative;
    display: inline-block;

    .btn .caret {
        margin-left: 4px;
    }

    //both-ends
    &.both-ends .btn {
        .clearfix;
        text-align: left;

        & > .caret {
            float: right;
        }
    }

    &.btn-group-default.btn-group .dropdown-toggle.btn:hover {
        border-bottom-color: darken(@btn-default-bg, 5%);
    }
}

.dropdown-toggle {
    position: relative;
    z-index: @zindex-dropdown;
}

// 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: 100%;
    padding: 0;
    margin: 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;
    //background-clip: padding-box;
    .box-shadow(0 6px 12px rgba(0, 0, 0, .175));
    animation-duration: .3s;
    animation-timing-function: cubic-bezier(0.23, 1, 0.32, 1);
    animation-fill-mode: both;
    animation-play-state: paused;
    max-height: @dropdown-wrap-max-height;
    overflow-y: auto;

    // 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 {
        .nav-divider(@dropdown-divider-bg);
    }

    // Links within the dropdown menu
    > li > a {
        display: block;
        padding: 6px 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
        cursor: pointer; //fixed link has not [href] style
    }
}

//Set scrollbar to dropdown menu btn-group
.dropdown.btn-group .dropdown-menu {
    max-height: @dropdown-max-height;
    overflow-y: auto;
}

.dropup > .dropdown-menu {
    .box-shadow(0 -6px 12px rgba(0, 0, 0, .175));
}

// 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
        .reset-filter();
        cursor: @cursor-disabled;
    }
}

// Open state for the dropdown
.open {
    //打开时的按钮样式
    &.dropup {
        > .dropdown-toggle.btn {
            &, &:active, &:focus {
                background: white;
                border-bottom: 1px solid @btn-default-active-bg !important;
                border-top: medium none;
            }
        }

        > .dropdown-menu {
            top: auto;
            bottom: @dropdown-menu-top;
            animation-name: slideDownIn;
            animation-play-state: running;
        }

        > .btn-lg ~ .dropdown-menu,
        > .btn-sm ~ .dropdown-menu,
        > .btn-xs ~ .dropdown-menu {
            top: auto;
        }
        > .btn-lg ~ .dropdown-menu {
            bottom: @dropdown-menu-lg-top;
        }

        > .btn-sm ~ .dropdown-menu {
            bottom: @dropdown-menu-sm-top;
        }

        > .btn-xs ~ .dropdown-menu {
            bottom: @dropdown-menu-xs-top;
        }
    }
    // Show the menu
    // 各种尺寸的menu偏移量不同
    > .dropdown-menu {
        display: block;
        top: @dropdown-menu-top;
        animation-name: slideUpIn;
        animation-play-state: running;
    }

    > .btn-lg ~ .dropdown-menu {
        top: @dropdown-menu-lg-top;
    }

    > .btn-sm ~ .dropdown-menu {
        top: @dropdown-menu-sm-top;
    }

    > .btn-xs ~ .dropdown-menu {
        top: @dropdown-menu-xs-top;
    }

    > .dropdown-toggle.btn {
        &, &:active, &:focus {
            background: white;
            border-bottom: 1px solid white;
        }

        &.btn-sm, &.btn-lg {
            //border: 1px solid @dropdown-border;
            border-bottom: 1px solid white;
        }
    }

    // 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;
}

//fixed link a active color
.dropdown > .btn-link:active {
    color: @link-color;
}

// Allow for dropdowns to go bottom up (aka)
//
// TODO: abstract this so that the navbar fixed styles are not placed here?
.dropup, .navbar-fixed-bottom .dropdown {
    // Reverse the caret
    .caret:before {
        content: "\F106";
    }
}

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

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

//nav pills
.nav.nav-pills {
    & .open > a, & .open > a:focus, & .open > a:hover {
        z-index: 10;
        border-bottom: medium none;
        padding-bottom: 10px !important;
        border-color: @btn-default-nav-pills-open-color;;
    }
}

//collapse navbar-collapse
.collapse.navbar-collapse {
    .dropdown-menu {
        border-color: @collapse-dropdown-border-color;
    }
}