framework/less/lib/Button.less

//
// Button groups
// --------------------------------------------------

// Make the div behave like a button
.ButtonGroup {
  position: relative;
  display: inline-block;
  vertical-align: middle;

  > .Button {
    position: relative;
    float: left;
    // Bring the "active" button to the front
    &:hover,
    &:focus,
    &:active,
    &.active {
      z-index: 2;
    }

    &:not(:first-child):not(:last-child):not(.Dropdown-toggle) {
      border-radius: 0;
    }
    &:first-child:not(:last-child):not(.Dropdown-toggle) {
      margin-left: 0;
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }
    &:last-child:not(:first-child), &.Dropdown-toggle:not(:first-child) {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
    }
  }

  .Button + .Button {
    margin-left: 1px;
  }
}

//
// Buttons
// --------------------------------------------------

.Button {
  display: inline-block;
  margin-bottom: 0; // For input.btn
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  white-space: nowrap;
  line-height: 20px;
  padding: 8px 13px;
  border-radius: @border-radius;
  .user-select(none);
  .Button--color(@control-color, @control-bg);
  border: 0;

  &:hover {
    text-decoration: none;
  }

  &:active,
  &.active,
  .open > &.Dropdown-toggle {
    .box-shadow(inset 0 3px 5px rgba(0, 0, 0, .125));
    outline: none;
  }

  &:focus,
  &.focus {
    outline: none;
  }

  &.disabled,
  &[disabled],
  fieldset[disabled] & {
    cursor: default;
    opacity: 0.65;
    .box-shadow(none);
  }

  a& {
    &.disabled,
    fieldset[disabled] & {
      pointer-events: none; // Future-proof disabling of clicks on `<a>` elements
    }
  }

  .Button-label {
    .transition(margin-right 0.1s);
  }
  .LoadingIndicator {
    color: inherit;
    margin: 0 -10px 0 -15px;
  }
  &.loading {
    .Button-label {
      margin-right: 20px;
    }
  }
}

.Button--color(@color; @background) {
  color: @color;
  background: @background;

  &:hover,
  &:focus,
  &.focus {
    background-color: darken(fadein(@background, 5%), 5%);
  }

  &:active,
  &.active,
  .open > .Dropdown-toggle& {
    background-color: darken(fadein(@background, 10%), 10%);
  }

  &.disabled,
  &[disabled],
  fieldset[disabled] & {
    background: @background;
  }
}


.Button--square {
  padding-left: 9px;
  padding-right: 9px;
}
.Button--rounded {
  border-radius: 18px;
}
.Button--flat {
  background: transparent;
  border-radius: 18px;
}
.Button--link {
  background: transparent !important;

  &:hover {
    background: transparent !important;
    color: @link-color;
  }
  &:active,
  &.active,
  &:focus,
  &.focus,
  .open > &.Dropdown-toggle {
    background: transparent !important;
    .box-shadow(none);
    color: @link-color;
  }
}
.Button--text {
  background: transparent !important;
  padding: 0;
  color: inherit !important;
  line-height: inherit;

  &:hover {
    text-decoration: underline;
  }
  &:active,
  &.active,
  .open > &.Dropdown-toggle {
    .box-shadow(none);
  }
}
.Button--primary {
  .Button--color(@body-bg, @primary-color);
  font-weight: bold;
  padding-left: 20px;
  padding-right: 20px;

  .Button-icon {
    display: none;
  }
}
.Button--danger {
  .Button--color(@control-danger-color, @control-danger-bg);
}
.Button--more {
  padding: 2px 4px;
  line-height: 1;

  .Button-icon {
    margin: 0;
  }
}
.Button--block {
  display: block;
  width: 100%;

  // Vertically space out multiple block buttons
  + .Button--block {
    margin-top: 5px;
  }
}
// Little round icon buttons
.Button--icon {
  width: 36px;
  text-align: center;
  padding: 8px 0;

  .Button-label, .Button-caret {
    display: none;
  }
  .Button-icon {
    font-size: 16px;
    vertical-align: -1px;
    margin: 0;
  }
}
.SessionDropdown .Dropdown-toggle {
  border-radius: 18px;

  .Avatar {
    margin: -2px 5px -2px -5px;
    .Avatar--size(24px);
  }
}
.Button-icon {
  margin-right: 3px;
}
.Button-icon,
.Button-caret {
  font-size: 14px;
}
.Button-caret {
  margin-left: 3px;
}
.Button-badge {
  font-size: 12px;
  font-weight: bold;
  margin-left: 10px;
}