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Try harder to keep context menus inside the window #7863

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merged 4 commits into from
Feb 24, 2022
Merged

Try harder to keep context menus inside the window #7863

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615f697
Try harder to keep context menus inside the window
robintown Feb 21, 2022
a7ccad3
Merge branch 'develop' into keep-menus-in-window
robintown Feb 23, 2022
3dfd883
Use UIStore for window dimensions
robintown Feb 23, 2022
c2b552b
Test ContextMenu positioning
robintown Feb 23, 2022
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54 changes: 41 additions & 13 deletions src/components/structures/ContextMenu.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ import { checkInputableElement, RovingTabIndexProvider } from "../../accessibili
// of doing reusable widgets like dialog boxes & menus where we go and
// pass in a custom control as the actual body.

const WINDOW_PADDING = 10;
const ContextualMenuContainerId = "mx_ContextualMenu_Container";

function getOrCreateContainer(): HTMLDivElement {
Expand Down Expand Up @@ -247,21 +248,48 @@ export default class ContextMenu extends React.PureComponent<IProps, IState> {

if (chevronFace === ChevronFace.Top || chevronFace === ChevronFace.Bottom) {
chevronOffset.left = props.chevronOffset;
} else if (position.top !== undefined) {
const target = position.top;

// By default, no adjustment is made
let adjusted = target;
} else {
chevronOffset.top = props.chevronOffset;
}

// If we know the dimensions of the context menu, adjust its position
// such that it does not leave the (padded) window.
if (contextMenuRect) {
const padding = 10;
adjusted = Math.min(position.top, document.body.clientHeight - contextMenuRect.height - padding);
// If we know the dimensions of the context menu, adjust its position to
// keep it within the bounds of the (padded) window
if (contextMenuRect) {
if (position.top !== undefined) {
position.top = Math.min(
position.top,
document.body.clientHeight - contextMenuRect.height - WINDOW_PADDING,
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);
// Adjust the chevron if necessary
if (chevronOffset.top !== undefined) {
chevronOffset.top = props.chevronOffset + props.top - position.top;
}
} else if (position.bottom !== undefined) {
position.bottom = Math.min(
position.bottom,
document.body.clientHeight - contextMenuRect.height - WINDOW_PADDING,
);
if (chevronOffset.top !== undefined) {
chevronOffset.top = props.chevronOffset + props.bottom - position.bottom;
}
}
if (position.left !== undefined) {
position.left = Math.min(
position.left,
document.body.clientWidth - contextMenuRect.width - WINDOW_PADDING,
);
if (chevronOffset.left !== undefined) {
chevronOffset.left = props.chevronOffset + props.left - position.left;
}
} else if (position.right !== undefined) {
position.right = Math.min(
position.right,
document.body.clientWidth - contextMenuRect.width - WINDOW_PADDING,
);
if (chevronOffset.left !== undefined) {
chevronOffset.left = props.chevronOffset + props.right - position.right;
}
}

position.top = adjusted;
chevronOffset.top = Math.max(props.chevronOffset, props.chevronOffset + target - adjusted);
}

let chevron;
Expand Down