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+//
+// 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;
+ .box-shadow(0 6px 12px rgba(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 {
+ .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
+ .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 {
+ .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();
+ }
+ }
+}