zui/src/less/components/forms.less

一个基于 Bootstrap 深度定制开源前端实践方案，帮助你快速构建现代跨屏应用。

/// ========================================================================
/// Bootstrap: form.less
/// https://github.com/twbs/bootstrap/blob/master/less/form.less
///
/// ZUI: The file has been changed in ZUI. It will not keep update with the
/// Bootsrap version in the future.
/// http://openzui.com
/// ========================================================================
/// Bootrap: Copyright 2011-2016 Twitter, Inc. Licensed under MIT
/// ========================================================================


// Normalize non-controls
//
// Restyle and baseline non-control form elements.

fieldset {
  padding: 0;
  margin: 0;
  border: 0;
}

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;
}

label {
  display: inline-block;
  margin-bottom: 5px;
  font-weight: bold;
}


// Normalize form controls

// Override content-box in Normalize (* isn't specific enough)
input[type="search"] { box-sizing: border-box; }

// Position radios and checkboxes better
input[type="radio"], input[type="checkbox"] {
  margin: 5px 0 0;
  margin-top: 0 \9; /* IE8-9 */
  line-height: normal;
}

// Set the height of select and file controls to match text inputs
input[type="file"] { display: block; }

// Make multiple select elements height not fixed
select[multiple], select[size] { height: auto; }

// Remove dashed box in firefox
select:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 #000;
}

// Fix optgroup Firefox bug per https://github.com/twbs/bootstrap/issues/7611
select optgroup { font-size: inherit; font-style: inherit; font-family: inherit; }

// Fix select style in mac
.os-mac select.form-control {
  -moz-appearance: none;
  -webkit-appearance: none;
  background-image: url('data:image/gif;base64,R0lGODlhBwAEAIAAAMvQ2////yH5BAEAAAEALAAAAAAHAAQAAAIIhA+BGWoNWSgAOw==');
  background-repeat: no-repeat;
  background-position: right 5px top 14px;
  padding-right: 18px;

  .input-sm & {
    background-position: right 5px top 9px;
  }

  .input-lg & {
    background-position: right 5px top 19px;
  }
}

// Focus for select, file, radio, and checkbox
input[type="file"]:focus, input[type="radio"]:focus, input[type="checkbox"]:focus { .tab-focus(); }

// Remove dashed box in radio
@-moz-document url-prefix() {
  input[type="radio"]:focus {
    outline: 2px solid @color-primary;
    -moz-outline-radius: 100%;
  }
}


// Fix for Chrome number input
// Setting certain font-sizes causes the `I` bar to appear on hover of the bottom increment button.
// See https://github.com/twbs/bootstrap/issues/8350 for more.
input[type="number"] {
  &::-webkit-outer-spin-button,
  &::-webkit-inner-spin-button { height: auto; }
}


// Placeholder

// Placeholder text gets special styles because when browsers invalidate entire
// lines if it doesn't understand a selector/
.form-control { .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-small-horizontal;
  font-size: @font-size-base;
  line-height: @line-height-base;
  color: @input-color;
  background-color: @input-bg;
  border: 1px solid @input-border;
  border-radius: @input-border-radius;
  box-shadow: @input-shadow;

  .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;
  }

  &[readonly] { cursor: default; }

  // Reset height for `textarea`s
  textarea& {
    height: auto;
    min-height: @input-height-base;
  }
}


// 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: @form-group-margin-bottom; }


// Checkboxes and radios
//
// Indent the labels to position radios/checkboxes as hanging controls.

.radio, .checkbox {
  position: relative;
  display: block;
  margin-top: 10px;
  margin-bottom: 10px;

  label {
    min-height: @line-height-computed; // Ensure the input doesn't jump when there is no text
    padding-left: 20px;
    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"] {
  position: absolute;
  margin-left: -20px;
  margin-top: 3px;
  margin-top: ~"4px \9";

  .os-android & {
    margin-top: 0;
  }
}

.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 {
  position: relative;
  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
// Some special care is needed because <label>s don't inherit their parent's `cursor`.
//
// Note: Neither radios nor checkboxes can be readonly.
input[type="radio"],
input[type="checkbox"] {
  &[disabled],
  &.disabled,
  fieldset[disabled] & {
    cursor: @cursor-disabled;
  }
}
// These classes are used directly on <label>s
.radio-inline,
.checkbox-inline {
  &.disabled,
  fieldset[disabled] & {
    cursor: @cursor-disabled;
  }
}
// These classes are used on elements with <label> descendants
.radio,
.checkbox {
  &.disabled,
  fieldset[disabled] & {
    label {
      cursor: @cursor-disabled;
    }
  }
}


// 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); }
.input-lg { .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large); }


// Form control feedback states
//
// Apply contextual and semantic states to individual form controls.

.has-warning { .form-control-validation(@state-warning-text; @state-warning-text; @state-warning-bg); }
.has-error   { .form-control-validation(@state-danger-text; @state-danger-text; @state-danger-bg); }
.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 {
  // Size it appropriately next to real form controls
  padding-top: (@padding-base-vertical + 1);
  padding-bottom: (@padding-base-vertical + 1);
  // Remove default margin from `p`
  margin-bottom: 0;
  min-height: (@line-height-computed + @font-size-base);
}


// 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 {
  display: block; // account for any element using help-block
  margin: 5px 0;
  color: lighten(@text-color, 25%); // lighten the text some for contrast
}


// 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 {
  // Kick in the inline
  @media (min-width: @screen-tablet)
  {
    // 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;
      width: auto;
      vertical-align: middle;
    }

    // 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
  .form-group > 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-tablet) {
    .form-group > label { text-align: right; }
  }
}

.required {
  position: relative;
  &:after {
    content: '*';
    color: @state-danger-text;
    display: inline-block;
    position: absolute;
    top: 0;
    right: -10px;
    font-size: @font-size-large;
  }

  .form-horizontal &:after {
    top: 5px;
    right: -1px;
  }
}