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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
import React from "react";
import PropTypes from "prop-types";
function shorten(coordinates) {
// In cases where the token is wider than the preview, the smartGap
// gets distorted. This shortens the coordinate array so that the smartGap
// is only touching 2 corners of the token (instead of all 4 corners)
coordinates.splice(0, 2);
coordinates.splice(4, 2);
return coordinates;
}
function getSmartGapCoordinates(
preview,
token,
offset,
orientation,
gapHeight,
coords
) {
if (orientation === "up") {
const coordinates = [
token.left - coords.left + offset,
token.top + token.height - (coords.top + preview.height) + gapHeight,
0,
0,
preview.width + offset,
0,
token.left + token.width - coords.left + offset,
token.top + token.height - (coords.top + preview.height) + gapHeight,
token.left + token.width - coords.left + offset,
token.top - (coords.top + preview.height) + gapHeight,
token.left - coords.left + offset,
token.top - (coords.top + preview.height) + gapHeight,
];
return preview.width > token.width ? coordinates : shorten(coordinates);
}
if (orientation === "down") {
const coordinates = [
token.left + token.width - (coords.left + preview.top) + offset,
0,
preview.width + offset,
coords.top - token.top + gapHeight,
0,
coords.top - token.top + gapHeight,
token.left - (coords.left + preview.top) + offset,
0,
token.left - (coords.left + preview.top) + offset,
token.height,
token.left + token.width - (coords.left + preview.top) + offset,
token.height,
];
return preview.width > token.width ? coordinates : shorten(coordinates);
}
return [
0,
token.top - coords.top,
gapHeight + token.width,
0,
gapHeight + token.width,
preview.height - gapHeight,
0,
token.top + token.height - coords.top,
token.width,
token.top + token.height - coords.top,
token.width,
token.top - coords.top,
];
}
function getSmartGapDimensions(
previewRect,
tokenRect,
offset,
orientation,
gapHeight,
coords
) {
if (orientation === "up") {
return {
height:
tokenRect.top +
tokenRect.height -
coords.top -
previewRect.height +
gapHeight,
width: Math.max(previewRect.width, tokenRect.width) + offset,
};
}
if (orientation === "down") {
return {
height: coords.top - tokenRect.top + gapHeight,
width: Math.max(previewRect.width, tokenRect.width) + offset,
};
}
return {
height: previewRect.height - gapHeight,
width: coords.left - tokenRect.left + gapHeight,
};
}
export default function SmartGap({
token,
preview,
type,
gapHeight,
coords,
offset,
}) {
const tokenRect = token.getBoundingClientRect();
const previewRect = preview.getBoundingClientRect();
const { orientation } = coords;
let optionalMarginLeft, optionalMarginTop;
if (orientation === "down") {
optionalMarginTop = -tokenRect.height;
} else if (orientation === "right") {
optionalMarginLeft = -tokenRect.width;
}
const { height, width } = getSmartGapDimensions(
previewRect,
tokenRect,
-offset,
orientation,
gapHeight,
coords
);
const coordinates = getSmartGapCoordinates(
previewRect,
tokenRect,
-offset,
orientation,
gapHeight,
coords
);
return (
<svg
version="1.1"
xmlns="http://www.w3.org/2000/svg"
style={{
height,
width,
position: "absolute",
marginLeft: optionalMarginLeft,
marginTop: optionalMarginTop,
}}
>
<polygon points={coordinates} fill="transparent" />
</svg>
);
}
SmartGap.propTypes = {
coords: PropTypes.object.isRequired,
gapHeight: PropTypes.number.isRequired,
offset: PropTypes.number.isRequired,
preview: PropTypes.object.isRequired,
token: PropTypes.object.isRequired,
type: PropTypes.oneOf(["popover", "tooltip"]).isRequired,
};
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