backpack-ui/dist/utils/mixins.js

Lonely Planet's Components

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.underlinedLink = exports.blueLink = exports.visuallyHidden = exports.outline = undefined;

var _extends2 = require("babel-runtime/helpers/extends");

var _extends3 = _interopRequireDefault(_extends2);

var _colors = require("../styles/colors");

var _colors2 = _interopRequireDefault(_colors);

var _timing = require("../styles/timing");

var _timing2 = _interopRequireDefault(_timing);

var _color = require("./color");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Adds outline styles
 * @param  {Number} offset Outline offset amount
 * @return {Object}        CSS styles
 */
function outline() {
  var offset = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 2;

  return typeof offset === "number" && {
    outline: "1px lightgray dotted",
    outlineOffset: offset + "px"
  };
}

/**
 * Hide only visually, but have available for screen readers
 * @return {Object} CSS styles
 */
function visuallyHidden(focusable) {
  var focusableStyles = {
    clip: "auto",
    clipPath: "none",
    height: "auto",
    margin: 0,
    overflow: "visible",
    position: "static",
    whiteSpace: "inherit",
    width: "auto"
  };

  return (0, _extends3.default)({}, {
    border: 0,
    clipPath: "inset(50%)",
    display: "inline-block",
    height: "1px",
    margin: "-1px",
    overflow: "hidden",
    padding: 0,
    whiteSpace: "nowrap",
    width: "1px"
  }, focusable === "focusable" ? {
    ":active": focusableStyles,
    ":focus": focusableStyles
  } : {});
}

/**
 * Creates a blue hyperlink; for use with inline styles via Radium
 * @return {Object} CSS styles
 */
function blueLink() {
  return {
    color: _colors2.default.linkPrimary,
    textDecoration: "none",
    transition: "color " + _timing2.default.fast + " ease-in-out",

    ":hover": {
      color: _colors2.default.linkPrimaryHover
    },

    ":active": {
      color: _colors2.default.linkPrimaryHover
    },

    ":focus": (0, _extends3.default)({}, outline(), {
      color: _colors2.default.linkPrimaryHover
    })
  };
}

/**
 * Creates a nicely underlined hyperlink
 * @param  {String} linkColor Link color
 * @return {Object}           CSS styles object
 */
function underlinedLink() {
  var linkColor = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _colors2.default.textPrimary;

  var underlineOffset = 2;
  var underlineWeight = 1;
  var backgroundColor = _colors2.default.bgPrimary;
  var underlineColor = (0, _color.rgba)(linkColor, 0.4);

  return {
    color: linkColor,
    position: "relative",
    textDecoration: "none",
    transition: "color " + _timing2.default.fast + " ease",

    // Draw the underline with a background gradient
    backgroundImage: "linear-gradient(\n      to top,\n      transparent,\n      transparent " + underlineOffset + "px,\n      " + underlineColor + " " + underlineOffset + "px,\n      " + underlineColor + " " + (underlineOffset + underlineWeight) + "px,\n      transparent " + (underlineOffset + underlineWeight) + "px\n    )",

    // Create breaks in the underline
    textShadow: "-1px -1px 0 " + backgroundColor + ",\n      1px -1px 0 " + backgroundColor + ",\n      -1px 1px 0 " + backgroundColor + ",\n      1px 1px 0 " + backgroundColor
  };
}

exports.outline = outline;
exports.visuallyHidden = visuallyHidden;
exports.blueLink = blueLink;
exports.underlinedLink = underlinedLink;