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Try to fix auto resizing in template part focus mode #37394

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merged 5 commits into from
Dec 28, 2021
Merged

Try to fix auto resizing in template part focus mode #37394

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d117ad9
Try to fix auto resizing in template part focus mode
kevin940726 Dec 15, 2021
5fa5c02
Force min-height: 0 in auto resize mode
kevin940726 Dec 15, 2021
bc1a27b
Try fixing border issue and fix firefox bugs
kevin940726 Dec 17, 2021
5f4c244
Force min-height: 0 for body and html
kevin940726 Dec 20, 2021
fba3860
Remove mutation observer
kevin940726 Dec 20, 2021
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64 changes: 52 additions & 12 deletions packages/edit-site/src/components/block-editor/resizable-editor.js
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Original file line number Diff line number Diff line change
Expand Up @@ -57,22 +57,49 @@ function ResizableEditor( { enableResizing, settings, ...props } ) {
return;
}

const resizeObserver = new iframe.contentWindow.ResizeObserver(
() => {
setHeight(
iframe.contentDocument.querySelector(
`.edit-site-block-editor__block-list`
).offsetHeight
let animationFrame = null;

function resizeHeight() {
if ( ! animationFrame ) {
// Throttle the updates on animation frame.
animationFrame = iframe.contentWindow.requestAnimationFrame(
() => {
setHeight(
iframe.contentDocument.documentElement
.scrollHeight
);
animationFrame = null;
}
);
}
);
}

let resizeObserver;

function registerObserver() {
resizeObserver?.disconnect();

resizeObserver = new iframe.contentWindow.ResizeObserver(
resizeHeight
);
// Observing the <html> rather than the <body> because the latter
// gets destroyed and remounted after initialization in <Iframe>.
resizeObserver.observe(
iframe.contentDocument.documentElement
);

resizeHeight();
}

// Observing the <html> rather than the <body> because the latter
// gets destroyed and remounted after initialization in <Iframe>.
resizeObserver.observe( iframe.contentDocument.documentElement );
// This is only required in Firefox for some unknown reasons.
iframe.addEventListener( 'load', registerObserver );
// This is required in Chrome and Safari.
registerObserver();

return () => {
resizeObserver.disconnect();
iframe.contentWindow?.cancelAnimationFrame( animationFrame );
resizeObserver?.disconnect();
iframe.removeEventListener( 'load', registerObserver );
};
},
[ enableResizing ]
Expand Down Expand Up @@ -133,8 +160,21 @@ function ResizableEditor( { enableResizing, settings, ...props } ) {
<style>{
// Forming a "block formatting context" to prevent margin collapsing.
// @see https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Block_formatting_context
`.edit-site-block-editor__block-list { display: flow-root; }`
`.is-root-container { display: flow-root; }`
}</style>
{ enableResizing && (
<style>
{
// Force the <html> and <body>'s heights to fit the content.
`html, body { height: -moz-fit-content !important; height: fit-content !important; min-height: 0 !important; }`
}
{
// Some themes will have `min-height: 100vh` for the root container,
// which isn't a requirement in auto resize mode.
`.is-root-container { min-height: 0 !important; }`
}
</style>
) }
</>
}
assets={ settings.__unstableResolvedAssets }
Expand Down