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Iframe: skip scoping styles #46752

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merged 1 commit into from
Sep 11, 2023
Merged

Iframe: skip scoping styles #46752

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5 changes: 4 additions & 1 deletion packages/block-editor/src/components/block-canvas/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,10 @@ export function ExperimentalBlockCanvas( {
if ( ! shouldIframe ) {
return (
<>
<EditorStyles styles={ styles } />
<EditorStyles
styles={ styles }
scope=".editor-styles-wrapper"
/>
<WritingFlow
ref={ contentRef }
className="editor-styles-wrapper"
Expand Down
1 change: 0 additions & 1 deletion packages/block-editor/src/components/block-list/content.scss
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Expand Up @@ -426,7 +426,6 @@
}

.block-editor-iframe__body {
background-color: $white;
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@ntsekouras This isn't a good solution because now this rule has a higher specificity than a theme just using the body selector. Also, if a theme sets it on html, it won't be visible. We need to set the white background on the iframe element so that it's not transparent. I fixed that below.

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In this brunch this issue #46291 doesn't work though since we're scaling the body of the iframe and this is where the background is applied from theme.json. Any ideas to work around that?

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Ah the scaling... I just talked to Riad about that the other day. I think we should moved the scaling outside the iframe. I'll make a separate PR for that then first.

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Would love to see this fix merged! It's breaking a lot of themes in our deployment of Gutenberg, so we've had to remove this line of CSS from our deployment. It seems like load order of CSS (for example, if CSS is concatenated) can break this.

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Ah nice, @fullofcaffeine found that this PR fixes the issue: #46732

transition: all 0.3s;
transform-origin: top center;
}
17 changes: 7 additions & 10 deletions packages/block-editor/src/components/editor-styles/index.js
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Expand Up @@ -16,10 +16,9 @@ import { useCallback, useMemo } from '@wordpress/element';
*/
import transformStyles from '../../utils/transform-styles';

const EDITOR_STYLES_SELECTOR = '.editor-styles-wrapper';
extend( [ namesPlugin, a11yPlugin ] );

function useDarkThemeBodyClassName( styles ) {
function useDarkThemeBodyClassName( styles, scope ) {
return useCallback(
( node ) => {
if ( ! node ) {
Expand All @@ -28,9 +27,7 @@ function useDarkThemeBodyClassName( styles ) {

const { ownerDocument } = node;
const { defaultView, body } = ownerDocument;
const canvas = ownerDocument.querySelector(
EDITOR_STYLES_SELECTOR
);
const canvas = scope ? ownerDocument.querySelector( scope ) : body;

let backgroundColor;

Expand Down Expand Up @@ -63,11 +60,11 @@ function useDarkThemeBodyClassName( styles ) {
body.classList.add( 'is-dark-theme' );
}
},
[ styles ]
[ styles, scope ]
);
}

export default function EditorStyles( { styles } ) {
export default function EditorStyles( { styles, scope } ) {
const stylesArray = useMemo(
() => Object.values( styles ?? [] ),
[ styles ]
Expand All @@ -76,9 +73,9 @@ export default function EditorStyles( { styles } ) {
() =>
transformStyles(
stylesArray.filter( ( style ) => style?.css ),
EDITOR_STYLES_SELECTOR
scope
),
[ stylesArray ]
[ stylesArray, scope ]
);

const transformedSvgs = useMemo(
Expand All @@ -94,7 +91,7 @@ export default function EditorStyles( { styles } ) {
<>
{ /* Use an empty style element to have a document reference,
but this could be any element. */ }
<style ref={ useDarkThemeBodyClassName( stylesArray ) } />
<style ref={ useDarkThemeBodyClassName( stylesArray, scope ) } />
{ transformedStyles.map( ( css, index ) => (
<style key={ index }>{ css }</style>
) ) }
Expand Down
2 changes: 1 addition & 1 deletion packages/block-library/src/reset.scss
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Expand Up @@ -7,7 +7,7 @@

// We use :where to keep specificity minimal.
// https://css-tricks.com/almanac/selectors/w/where/
html :where(.editor-styles-wrapper) {
:where(.editor-styles-wrapper) {
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Don't you think the changes in this "reset" file might impact non-framed editors?

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Changing this line has created a regression within the iframe when using some classic themes.
#57176

/**
* The following styles revert to the browser defaults overriding the WPAdmin styles.
* This is only needed while the block editor is not being loaded in an iframe.
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1 change: 1 addition & 0 deletions packages/edit-site/src/components/block-editor/style.scss
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Expand Up @@ -31,6 +31,7 @@
display: block;
width: 100%;
height: 100%;
background: $white;
}

.edit-site-visual-editor__editor-canvas {
Expand Down
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