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Provide default algorithm for section root in block editor #65516

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getdave wants to merge 3 commits into from
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Provide default algorithm for section root in block editor #65516

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fa9ef34
Implement default algorithm
getdave Sep 20, 2024
18e2cbb
Update setting to return undefined
getdave Sep 20, 2024
61f62e1
Return original default when it template-locked
getdave Sep 20, 2024
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Implement default algorithm
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@getdave
getdave committed Dec 5, 2024
commit fa9ef34ba516b01d2f063edc77ed4ebcf1ef62d4
20 changes: 18 additions & 2 deletions packages/block-editor/src/store/private-selectors.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@ import {
getClientIdsWithDescendants,
isNavigationMode,
getBlockRootClientId,
getBlocksByName,
getBlockAttributes,
} from './selectors';
import {
checkAllowListRecursive,
Expand Down Expand Up @@ -563,10 +565,24 @@ export const getBlockStyles = createSelector(
*
* @param {Object} state Editor state.
*
* @return {string|undefined} The section root client ID or undefined if not set.
* @return {string} The section root client ID.
*/
export function getSectionRootClientId( state ) {
return state.settings?.[ sectionRootClientIdKey ];
const settingsRootClientId = state.settings?.[ sectionRootClientIdKey ];

// Specifically check that the setting was not provided to avoid
// cases where the provided setting is an empty string to signify
// the "root block" of the editor.
if ( settingsRootClientId !== undefined ) {
return settingsRootClientId;
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@youknowriad youknowriad Sep 20, 2024

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Do we explicitly provide "" as a settingsRootClientId in the post editor today or do we leave that to the block-editor's algorithm?

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@getdave getdave Sep 20, 2024

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As @wordpress/editor provides the setting, today Site and Post Editors would use the algorithm that looks for main.

However, if the rendering mode is template-locked (like when you are editing a Page in the Site Editor) then the default would be '' (empty string).

I think the question is here

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@youknowriad youknowriad Sep 20, 2024

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Main main question is about "performance". In other words, it seems unnecessary to run the fallback for post and page editors in "post-only" mode (not template-locked), for template-locked, I suspect that we already have something that sets the "post-content" block as section root.

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@getdave getdave Sep 20, 2024

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I see what you mean. If we are in Post Editor (Posts or Pages or whatever) we are in post-only mode. Therefore we're going to be looking for a main tag which is very unlikely to exist.

Yes maybe I need to do some more digging to find where these editors end up with '' as the sectionRootClientId.

}

return (
getBlocksByName( state, 'core/group' ).find(
( clientId ) =>
getBlockAttributes( state, clientId )?.tagName === 'main'
) ?? ''
);
}

/**
Expand Down