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1//
2// Dropdown menus
3// --------------------------------------------------
4
5
6// Dropdown arrow/caret
7.caret {
8  display: inline-block;
9  width: 0;
10  height: 0;
11  margin-left: 2px;
12  vertical-align: middle;
13  border-top:   @caret-width-base dashed;
14  border-right: @caret-width-base solid transparent;
15  border-left:  @caret-width-base solid transparent;
16}
17
18// The dropdown wrapper (div)
19.dropup,
20.dropdown {
21  position: relative;
22}
23
24// Prevent the focus on the dropdown toggle when closing dropdowns
25.dropdown-toggle:focus {
26  outline: 0;
27}
28
29// The dropdown menu (ul)
30.dropdown-menu {
31  position: absolute;
32  top: 100%;
33  left: 0;
34  z-index: @zindex-dropdown;
35  display: none; // none by default, but block on "open" of the menu
36  float: left;
37  min-width: 160px;
38  padding: 5px 0;
39  margin: 2px 0 0; // override default ul
40  list-style: none;
41  font-size: @font-size-base;
42  text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
43  background-color: @dropdown-bg;
44  border: 1px solid @dropdown-fallback-border; // IE8 fallback
45  border: 1px solid @dropdown-border;
46  border-radius: @border-radius-base;
47  .box-shadow(0 6px 12px rgba(0,0,0,.175));
48  background-clip: padding-box;
49
50  // Aligns the dropdown menu to right
51  //
52  // Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`
53  &.pull-right {
54    right: 0;
55    left: auto;
56  }
57
58  // Dividers (basically an hr) within the dropdown
59  .divider {
60    .nav-divider(@dropdown-divider-bg);
61  }
62
63  // Links within the dropdown menu
64  > li > a {
65    display: block;
66    padding: 3px 20px;
67    clear: both;
68    font-weight: normal;
69    line-height: @line-height-base;
70    color: @dropdown-link-color;
71    white-space: nowrap; // prevent links from randomly breaking onto new lines
72  }
73}
74
75// Hover/Focus state
76.dropdown-menu > li > a {
77  &:hover,
78  &:focus {
79    text-decoration: none;
80    color: @dropdown-link-hover-color;
81    background-color: @dropdown-link-hover-bg;
82  }
83}
84
85// Active state
86.dropdown-menu > .active > a {
87  &,
88  &:hover,
89  &:focus {
90    color: @dropdown-link-active-color;
91    text-decoration: none;
92    outline: 0;
93    background-color: @dropdown-link-active-bg;
94  }
95}
96
97// Disabled state
98//
99// Gray out text and ensure the hover/focus state remains gray
100
101.dropdown-menu > .disabled > a {
102  &,
103  &:hover,
104  &:focus {
105    color: @dropdown-link-disabled-color;
106  }
107
108  // Nuke hover/focus effects
109  &:hover,
110  &:focus {
111    text-decoration: none;
112    background-color: transparent;
113    background-image: none; // Remove CSS gradient
114    .reset-filter();
115    cursor: @cursor-disabled;
116  }
117}
118
119// Open state for the dropdown
120.open {
121  // Show the menu
122  > .dropdown-menu {
123    display: block;
124  }
125
126  // Remove the outline when :focus is triggered
127  > a {
128    outline: 0;
129  }
130}
131
132// Menu positioning
133//
134// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
135// menu with the parent.
136.dropdown-menu-right {
137  left: auto; // Reset the default from `.dropdown-menu`
138  right: 0;
139}
140// With v3, we enabled auto-flipping if you have a dropdown within a right
141// aligned nav component. To enable the undoing of that, we provide an override
142// to restore the default dropdown menu alignment.
143//
144// This is only for left-aligning a dropdown menu within a `.navbar-right` or
145// `.pull-right` nav component.
146.dropdown-menu-left {
147  left: 0;
148  right: auto;
149}
150
151// Dropdown section headers
152.dropdown-header {
153  display: block;
154  padding: 3px 20px;
155  font-size: @font-size-small;
156  line-height: @line-height-base;
157  color: @dropdown-header-color;
158  white-space: nowrap; // as with > li > a
159}
160
161// Backdrop to catch body clicks on mobile, etc.
162.dropdown-backdrop {
163  position: fixed;
164  left: 0;
165  right: 0;
166  bottom: 0;
167  top: 0;
168  z-index: (@zindex-dropdown - 10);
169}
170
171// Right aligned dropdowns
172.pull-right > .dropdown-menu {
173  right: 0;
174  left: auto;
175}
176
177// Allow for dropdowns to go bottom up (aka, dropup-menu)
178//
179// Just add .dropup after the standard .dropdown class and you're set, bro.
180// TODO: abstract this so that the navbar fixed styles are not placed here?
181
182.dropup,
183.navbar-fixed-bottom .dropdown {
184  // Reverse the caret
185  .caret {
186    border-top: 0;
187    border-bottom: @caret-width-base solid;
188    content: "";
189  }
190  // Different positioning for bottom up menu
191  .dropdown-menu {
192    top: auto;
193    bottom: 100%;
194    margin-bottom: 2px;
195  }
196}
197
198
199// Component alignment
200//
201// Reiterate per navbar.less and the modified component alignment there.
202
203@media (min-width: @grid-float-breakpoint) {
204  .navbar-right {
205    .dropdown-menu {
206      .dropdown-menu-right();
207    }
208    // Necessary for overrides of the default right aligned menu.
209    // Will remove come v4 in all likelihood.
210    .dropdown-menu-left {
211      .dropdown-menu-left();
212    }
213  }
214}
215