app: move docs to sepate comonent

The docs iframe is quite complex, so move it to a separate component to
improve readability.
This commit is contained in:
David Lechner
2021-12-27 12:38:51 -06:00
parent dd0782e8b4
commit b3db3d9efc
+110 -109
View File
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: MIT
// Copyright (c) 2020 The Pybricks Authors
// Copyright (c) 2020-2021 The Pybricks Authors
import { Classes } from '@blueprintjs/core';
import React, { useState } from 'react';
@@ -17,10 +17,113 @@ import { isMacOS } from '../utils/os';
import 'react-splitter-layout/lib/index.css';
import './app.scss';
const Docs: React.FunctionComponent = (_props) => {
const dispatch = useDispatch();
return (
<iframe
// REVISIT: some of this could be moved to the docs repo
// so that it runs earlier to prevent flashing in the UI.
// The load event doesn't run until after the page is fully
// loaded and there doesn't seem to be a reasonable way to
// hook into the iframe to know when it has a new document.
onLoad={(e) => {
// HACK: this mess restores the scroll position when
// the documentation iframe visibility is toggled.
// The iframe will be automatically scrolled to 0 when
// CSS `display: none` is set.
const target = e.target as HTMLIFrameElement;
const contentWindow = target.contentWindow;
if (!contentWindow) {
console.error('could not get iframe content window');
return;
}
// the last "good" scrollY value of the iframe
let iframeScroll = 0;
// This bit monitors the visibility.
// https://stackoverflow.com/a/44670818/1976323
const observer = new IntersectionObserver(
(entries) => {
entries.forEach((entry) => {
// Restore the scroll position when the iframe is
// shown. Toggling the visibility prevents flashing
// the contents from the top of the page before the
// scroll is done.
if (entry.intersectionRatio > 0) {
contentWindow.scrollTo(0, iframeScroll);
contentWindow.document.documentElement.style.visibility =
'visible';
} else {
contentWindow.document.documentElement.style.visibility =
'hidden';
}
});
},
{
root: target.parentElement,
},
);
observer.observe(target);
// Have to remove he observer, otherwise we end up with
// conflicting values when a new page is loaded in the iframe.
contentWindow.addEventListener('unload', () => {
observer.unobserve(target);
});
// And this keeps track of the scroll position.
contentWindow.addEventListener('scroll', () => {
if (contentWindow.scrollY !== 0) {
// Record the current scroll position. If it is 0, it
// could be that the iframe has been hidden or the user
// scrolled there. So we have to ignore 0. But we don't
// want to be one pixel off if the user really did
// scroll there, so we assume that if the last scroll
// is 1, then the user probably went all the way to 0.
if (contentWindow.scrollY === 1) {
iframeScroll = 0;
} else {
iframeScroll = contentWindow.scrollY;
}
}
});
// Override browser default key bindings in iframe.
contentWindow.document.addEventListener('keydown', (e) => {
// use Ctrl-D/Cmd-D to toggle docs
if (
(isMacOS()
? e.metaKey && !e.ctrlKey
: e.ctrlKey && !e.metaKey) &&
!e.altKey &&
e.key == 'd'
) {
e.preventDefault();
dispatch(toggleBoolean(BooleanSettingId.ShowDocs));
}
});
if (document.body.classList.contains(Classes.DARK)) {
contentWindow.document.documentElement.classList.add(Classes.DARK);
}
}}
src="static/docs/index.html"
allowFullScreen={true}
title="docs"
width="100%"
height="100%"
frameBorder="none"
/>
);
};
const App: React.FunctionComponent = (_props) => {
const showDocs = useSelector((s: RootState): boolean => s.settings.showDocs);
const [dragging, setDragging] = useState(false);
const dispatch = useDispatch();
const [isDragging, setIsDragging] = useState(false);
return (
<div className="pb-app">
@@ -29,8 +132,8 @@ const App: React.FunctionComponent = (_props) => {
customClassName={`pb-app-body ${
showDocs ? 'pb-show-docs' : 'pb-hide-docs'
}`}
onDragStart={(): void => setDragging(true)}
onDragEnd={(): void => setDragging(false)}
onDragStart={(): void => setIsDragging(true)}
onDragEnd={(): void => setIsDragging(false)}
percentage={true}
secondaryInitialSize={Number(
localStorage.getItem('app-docs-split') || 30,
@@ -55,110 +158,8 @@ const App: React.FunctionComponent = (_props) => {
</div>
</SplitterLayout>
<div className="h-100 w-100">
{dragging && <div className="h-100 w-100 p-absolute" />}
<iframe
// REVISIT: some of this could be moved to the docs repo
// so that it runs earlier to prevent flashing in the UI.
// The load event doesn't run until after the page is fully
// loaded and there doesn't seem to be a reasonable way to
// hook into the iframe to know when it has a new document.
onLoad={(e) => {
// HACK: this mess restores the scroll position when
// the documentation iframe visibility is toggled.
// The iframe will be automatically scrolled to 0 when
// CSS `display: none` is set.
const target = e.target as HTMLIFrameElement;
const contentWindow = target.contentWindow;
if (!contentWindow) {
console.error('could not get iframe content window');
return;
}
// the last "good" scrollY value of the iframe
let iframeScroll = 0;
// This bit monitors the visibility.
// https://stackoverflow.com/a/44670818/1976323
const observer = new IntersectionObserver(
(entries) => {
entries.forEach((entry) => {
// Restore the scroll position when the
// iframe is shown. Toggling the visibility
// prevents flashing the contents from the
// top of the page before the scroll is
// done.
if (entry.intersectionRatio > 0) {
contentWindow.scrollTo(0, iframeScroll);
contentWindow.document.documentElement.style.visibility =
'visible';
} else {
contentWindow.document.documentElement.style.visibility =
'hidden';
}
});
},
{
root: target.parentElement,
},
);
observer.observe(target);
// Have to remove he observer, otherwise we end up
// with conflicting values when a new page is loaded
// in the iframe.
contentWindow.addEventListener('unload', () => {
observer.unobserve(target);
});
// And this keeps track of the scroll position.
contentWindow.addEventListener('scroll', () => {
if (contentWindow.scrollY !== 0) {
// Record the current scroll position.
// If it is 0, it could be that the iframe
// has been hidden or the user scrolled
// there. So we have to ignore 0. But we
// don't want to be one pixel off if the
// user really did scroll there, so we
// assume that if the last scroll is 1, then
// the user probably went all the way to 0.
if (contentWindow.scrollY === 1) {
iframeScroll = 0;
} else {
iframeScroll = contentWindow.scrollY;
}
}
});
// Override browser default key bindings in iframe.
contentWindow.document.addEventListener('keydown', (e) => {
// use Ctrl-D/Cmd-D to toggle docs
if (
(isMacOS()
? e.metaKey && !e.ctrlKey
: e.ctrlKey && !e.metaKey) &&
!e.altKey &&
e.key == 'd'
) {
e.preventDefault();
dispatch(toggleBoolean(BooleanSettingId.ShowDocs));
}
});
if (document.body.classList.contains(Classes.DARK)) {
contentWindow.document.documentElement.classList.add(
Classes.DARK,
);
}
}}
src="static/docs/index.html"
allowFullScreen={true}
title="docs"
width="100%"
height="100%"
frameBorder="none"
/>
{isDragging && <div className="h-100 w-100 p-absolute" />}
<Docs />
</div>
</SplitterLayout>
<StatusBar />