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Change interactive tooltip to only flip when required 

This changes the interactive tooltip to only flip around when the tooltip
content would be near the window edge.

Fixes https://github.com/vector-im/riot-web/issues/10176
pull/21833/head
J. Ryan Stinnett 2019-06-26 18:16:38 +01:00
parent 15d286ed93
commit e8fba4f770
1 changed files with 11 additions and 6 deletions
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17
src/components/views/elements/InteractiveTooltip.js
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@ -21,6 +21,10 @@ import classNames from 'classnames';
const InteractiveTooltipContainerId = "mx_InteractiveTooltip_Container";
// If the distance from tooltip to window edge is below this value, the tooltip
// will flip around to the other side of the target.
const MIN_SAFE_DISTANCE_TO_WINDOW_EDGE = 20;
function getOrCreateContainer() {
let container = document.getElementById(InteractiveTooltipContainerId);
@ -121,7 +125,7 @@ export default class InteractiveTooltip extends React.Component {
}
renderTooltip() {
const { visible } = this.state;
const { contentRect, visible } = this.state;
if (!visible) {
ReactDOM.unmountComponentAtNode(getOrCreateContainer());
return null;
@ -134,11 +138,12 @@ export default class InteractiveTooltip extends React.Component {
const targetBottom = targetRect.bottom + window.pageYOffset;
const targetTop = targetRect.top + window.pageYOffset;
// Align the tooltip vertically on whichever side of the target has more
// space available.
// Place the tooltip above the target by default. If we find that the
// tooltip content would extend past the safe area towards the window
// edge, flip around to below the target.
const position = {};
let chevronFace = null;
if (targetBottom < window.innerHeight / 2) {
if (contentRect && (targetTop - contentRect.height <= MIN_SAFE_DISTANCE_TO_WINDOW_EDGE)) {
position.top = targetBottom;
chevronFace = "top";
} else {
@ -158,8 +163,8 @@ export default class InteractiveTooltip extends React.Component {
});
const menuStyle = {};
if (this.state.contentRect) {
menuStyle.left = `-${this.state.contentRect.width / 2}px`;
if (contentRect) {
menuStyle.left = `-${contentRect.width / 2}px`;
}
const tooltip = <div className="mx_InteractiveTooltip_wrapper" style={{...position}}>