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'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var invariant = _interopDefault(require('tiny-invariant'));
var getRect = function getRect(_ref) {
var top = _ref.top,
right = _ref.right,
bottom = _ref.bottom,
left = _ref.left;
var width = right - left;
var height = bottom - top;
var rect = {
top: top,
right: right,
bottom: bottom,
left: left,
width: width,
height: height,
x: left,
y: top,
center: {
x: (right + left) / 2,
y: (bottom + top) / 2
}
};
return rect;
};
var expand = function expand(target, expandBy) {
return {
top: target.top - expandBy.top,
left: target.left - expandBy.left,
bottom: target.bottom + expandBy.bottom,
right: target.right + expandBy.right
};
};
var shrink = function shrink(target, shrinkBy) {
return {
top: target.top + shrinkBy.top,
left: target.left + shrinkBy.left,
bottom: target.bottom - shrinkBy.bottom,
right: target.right - shrinkBy.right
};
};
var shift = function shift(target, shiftBy) {
return {
top: target.top + shiftBy.y,
left: target.left + shiftBy.x,
bottom: target.bottom + shiftBy.y,
right: target.right + shiftBy.x
};
};
var noSpacing = {
top: 0,
right: 0,
bottom: 0,
left: 0
};
var createBox = function createBox(_ref2) {
var borderBox = _ref2.borderBox,
_ref2$margin = _ref2.margin,
margin = _ref2$margin === void 0 ? noSpacing : _ref2$margin,
_ref2$border = _ref2.border,
border = _ref2$border === void 0 ? noSpacing : _ref2$border,
_ref2$padding = _ref2.padding,
padding = _ref2$padding === void 0 ? noSpacing : _ref2$padding;
var marginBox = getRect(expand(borderBox, margin));
var paddingBox = getRect(shrink(borderBox, border));
var contentBox = getRect(shrink(paddingBox, padding));
return {
marginBox: marginBox,
borderBox: getRect(borderBox),
paddingBox: paddingBox,
contentBox: contentBox,
margin: margin,
border: border,
padding: padding
};
};
var parse = function parse(raw) {
var value = raw.slice(0, -2);
var suffix = raw.slice(-2);
if (suffix !== 'px') {
return 0;
}
var result = Number(value);
!!isNaN(result) ? process.env.NODE_ENV !== "production" ? invariant(false, "Could not parse value [raw: " + raw + ", without suffix: " + value + "]") : invariant(false) : void 0;
return result;
};
var getWindowScroll = function getWindowScroll() {
return {
x: window.pageXOffset,
y: window.pageYOffset
};
};
var offset = function offset(original, change) {
var borderBox = original.borderBox,
border = original.border,
margin = original.margin,
padding = original.padding;
var shifted = shift(borderBox, change);
return createBox({
borderBox: shifted,
border: border,
margin: margin,
padding: padding
});
};
var withScroll = function withScroll(original, scroll) {
if (scroll === void 0) {
scroll = getWindowScroll();
}
return offset(original, scroll);
};
var calculateBox = function calculateBox(borderBox, styles) {
var margin = {
top: parse(styles.marginTop),
right: parse(styles.marginRight),
bottom: parse(styles.marginBottom),
left: parse(styles.marginLeft)
};
var padding = {
top: parse(styles.paddingTop),
right: parse(styles.paddingRight),
bottom: parse(styles.paddingBottom),
left: parse(styles.paddingLeft)
};
var border = {
top: parse(styles.borderTopWidth),
right: parse(styles.borderRightWidth),
bottom: parse(styles.borderBottomWidth),
left: parse(styles.borderLeftWidth)
};
return createBox({
borderBox: borderBox,
margin: margin,
padding: padding,
border: border
});
};
var getBox = function getBox(el) {
var borderBox = el.getBoundingClientRect();
var styles = window.getComputedStyle(el);
return calculateBox(borderBox, styles);
};
exports.calculateBox = calculateBox;
exports.createBox = createBox;
exports.expand = expand;
exports.getBox = getBox;
exports.getRect = getRect;
exports.offset = offset;
exports.shrink = shrink;
exports.withScroll = withScroll;