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Bootstrap/less/forms.less

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//
// Forms
// --------------------------------------------------
// Normalize non-controls
//
// Restyle and baseline non-control form elements.
fieldset {
padding: 0;
margin: 0;
border: 0;
}
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legend {
display: block;
width: 100%;
padding: 0;
margin-bottom: @line-height-computed;
font-size: (@font-size-base * 1.5);
line-height: inherit;
color: @legend-color;
border: 0;
border-bottom: 1px solid @legend-border-color;
}
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label {
display: inline-block;
margin-bottom: 5px;
font-weight: bold;
}
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// Normalize form controls
// Override content-box in Normalize (* isn't specific enough)
input[type="search"] {
.box-sizing(border-box);
}
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// Position radios and checkboxes better
input[type="radio"],
input[type="checkbox"] {
margin: 4px 0 0;
margin-top: 1px \9; /* IE8-9 */
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line-height: normal;
}
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// Set the height of select and file controls to match text inputs
input[type="file"] {
display: block;
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}
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// Make multiple select elements height not fixed
select[multiple],
select[size] {
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height: auto;
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}
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// Fix optgroup Firefox bug per https://github.com/twbs/bootstrap/issues/7611
select optgroup {
font-size: inherit;
font-style: inherit;
font-family: inherit;
}
// Focus for select, file, radio, and checkbox
input[type="file"]:focus,
input[type="radio"]:focus,
input[type="checkbox"]:focus {
.tab-focus();
}
// Fix for Chrome number input
// Setting certain font-sizes causes the `I` bar to appear on hover of the bottom increment button.
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// See https://github.com/twbs/bootstrap/issues/8350 for more.
input[type="number"] {
&::-webkit-outer-spin-button,
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&::-webkit-inner-spin-button {
height: auto;
}
}
// Adjust output element
output {
display: block;
padding-top: (@padding-base-vertical + 1);
font-size: @font-size-base;
line-height: @line-height-base;
color: @input-color;
vertical-align: middle;
}
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// Placeholder
//
// Placeholder text gets special styles because when browsers invalidate entire
// lines if it doesn't understand a selector/
.form-control {
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.placeholder();
}
// Common form controls
//
// Shared size and type resets for form controls. Apply `.form-control` to any
// of the following form controls:
//
// select
// textarea
// input[type="text"]
// input[type="password"]
// input[type="datetime"]
// input[type="datetime-local"]
// input[type="date"]
// input[type="month"]
// input[type="time"]
// input[type="week"]
// input[type="number"]
// input[type="email"]
// input[type="url"]
// input[type="search"]
// input[type="tel"]
// input[type="color"]
.form-control {
display: block;
width: 100%;
height: @input-height-base; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
padding: @padding-base-vertical @padding-base-horizontal;
font-size: @font-size-base;
line-height: @line-height-base;
color: @input-color;
vertical-align: middle;
background-color: @input-bg;
background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
border: 1px solid @input-border;
border-radius: @input-border-radius;
.box-shadow(inset 0 1px 1px rgba(0,0,0,.075));
.transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
// Customize the `:focus` state to imitate native WebKit styles.
.form-control-focus();
// Disabled and read-only inputs
// Note: HTML5 says that controls under a fieldset > legend:first-child won't
// be disabled if the fieldset is disabled. Due to implementation difficulty,
// we don't honor that edge case; we style them as disabled anyway.
&[disabled],
&[readonly],
fieldset[disabled] & {
cursor: not-allowed;
background-color: @input-bg-disabled;
}
// Reset height for `textarea`s
textarea& {
height: auto;
}
}
// Form groups
//
// Designed to help with the organization and spacing of vertical forms. For
// horizontal forms, use the predefined grid classes.
.form-group {
margin-bottom: 15px;
}
// Checkboxes and radios
//
// Indent the labels to position radios/checkboxes as hanging controls.
.radio,
.checkbox {
display: block;
min-height: @line-height-computed; // clear the floating input if there is no label text
margin-top: 10px;
margin-bottom: 10px;
padding-left: 20px;
vertical-align: middle;
label {
display: inline;
margin-bottom: 0;
font-weight: normal;
cursor: pointer;
}
}
.radio input[type="radio"],
.radio-inline input[type="radio"],
.checkbox input[type="checkbox"],
.checkbox-inline input[type="checkbox"] {
float: left;
margin-left: -20px;
}
.radio + .radio,
.checkbox + .checkbox {
margin-top: -5px; // Move up sibling radios or checkboxes for tighter spacing
}
// Radios and checkboxes on same line
.radio-inline,
.checkbox-inline {
display: inline-block;
padding-left: 20px;
margin-bottom: 0;
vertical-align: middle;
font-weight: normal;
cursor: pointer;
}
.radio-inline + .radio-inline,
.checkbox-inline + .checkbox-inline {
margin-top: 0;
margin-left: 10px; // space out consecutive inline controls
}
// Apply same disabled cursor tweak as for inputs
//
// Note: Neither radios nor checkboxes can be readonly.
input[type="radio"],
input[type="checkbox"],
.radio,
.radio-inline,
.checkbox,
.checkbox-inline {
&[disabled],
fieldset[disabled] & {
cursor: not-allowed;
}
}
// Form control sizing
.input-sm {
.input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
}
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.input-lg {
.input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
}
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// Form control feedback states
//
// Apply contextual and semantic states to individual form controls.
// Warning
.has-warning {
.form-control-validation(@state-warning-text; @state-warning-text; @state-warning-bg);
}
// Error
.has-error {
.form-control-validation(@state-danger-text; @state-danger-text; @state-danger-bg);
}
// Success
.has-success {
.form-control-validation(@state-success-text; @state-success-text; @state-success-bg);
}
// Static form control text
//
// Apply class to a `p` element to make any string of text align with labels in
// a horizontal form layout.
.form-control-static {
margin-bottom: 0; // Remove default margin from `p`
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padding-top: (@padding-base-vertical + 1);
}
// Help text
//
// Apply to any element you wish to create light text for placement immediately
// below a form control. Use for general help, formatting, or instructional text.
.help-block {
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display: block; // account for any element using help-block
margin-top: 5px;
margin-bottom: 10px;
color: lighten(@text-color, 25%); // lighten the text some for contrast
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}
// Inline forms
//
// Make forms appear inline(-block) by adding the `.form-inline` class. Inline
// forms begin stacked on extra small (mobile) devices and then go inline when
// viewports reach <768px.
//
// Requires wrapping inputs and labels with `.form-group` for proper display of
// default HTML form controls and our custom form controls (e.g., input groups).
//
// Heads up! This is mixin-ed into `.navbar-form` in navbars.less.
.form-inline {
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// Kick in the inline
@media (min-width: @screen-sm) {
// Inline-block all the things for "inline"
.form-group {
display: inline-block;
margin-bottom: 0;
vertical-align: middle;
}
// In navbar-form, allow folks to *not* use `.form-group`
.form-control {
display: inline-block;
}
// Remove default margin on radios/checkboxes that were used for stacking, and
// then undo the floating of radios and checkboxes to match (which also avoids
// a bug in WebKit: https://github.com/twbs/bootstrap/issues/1969).
.radio,
.checkbox {
display: inline-block;
margin-top: 0;
margin-bottom: 0;
padding-left: 0;
}
.radio input[type="radio"],
.checkbox input[type="checkbox"] {
float: none;
margin-left: 0;
}
}
}
// Horizontal forms
//
// Horizontal forms are built on grid classes and allow you to create forms with
// labels on the left and inputs on the right.
.form-horizontal {
// Consistent vertical alignment of labels, radios, and checkboxes
.control-label,
.radio,
.checkbox,
.radio-inline,
.checkbox-inline {
margin-top: 0;
margin-bottom: 0;
padding-top: (@padding-base-vertical + 1); // Default padding plus a border
}
// Make form groups behave like rows
.form-group {
.make-row();
}
// Only right align form labels here when the columns stop stacking
@media (min-width: @screen-sm) {
.control-label {
text-align: right;
}
}
}