[Share] Expand all subcollections

[mjthoraval]

Description

Expand all subcollections for a given collection.
It also expand all collections and subcollections when applied on a library.
From the idea #357.

Event

None

Operation

Script

Data

/**
 * Expand all subcollections of currently selected collection or library
 * @author mjthoraval with Claude.ai
 * @usage Select a collection in the library and press the assigned shortcut keys
 * @link https://github.com/windingwind/zotero-actions-tags/discussions/559
 * @update 11 February 2026, 11:01
 */

const zoteroPane = Zotero.getActiveZoteroPane();
const selectedCollection = zoteroPane.getSelectedCollection();

// Recursive function to expand a collection and all its children
async function expandCollectionAndChildren(collectionID) {
    const rowIndex = zoteroPane.collectionsView.getRowIndexByID(`C${collectionID}`);
    
    if (rowIndex !== false && !zoteroPane.collectionsView.isContainerOpen(rowIndex)) {
        await zoteroPane.collectionsView.toggleOpenState(rowIndex);
    }
    
    // Get and expand all child collections
    const childCollections = Zotero.Collections.getByParent(collectionID);
    for (let child of childCollections) {
        await expandCollectionAndChildren(child.id);
    }
}

// Check if a collection is selected
if (selectedCollection) {
    // Expand the selected collection and all its subcollections
    await expandCollectionAndChildren(selectedCollection.id);
    //return `Expanded all subcollections of "${selectedCollection.name}"`;
} else {
    // No collection selected, expand entire library
    const libraryID = zoteroPane.getSelectedLibraryID();
    await zoteroPane.collectionsView.expandLibrary(libraryID, true);
    
    const libraryName = Zotero.Libraries.get(libraryID).name;
    //return `Expanded all collections in library "${libraryName}"`;
}

Anything else

No response

[iagogv3]

Wow! huge thanks to you!

I adapted your code for collapsing all subcollections (removing the last else, in order to do nothing if there is no selected collection):

/**
 * Collapse all subcollections of currently selected collection or library
 * @author iagogv3
 * @usage Select a collection in the library and press the assigned shortcut keys
 * @link https://github.com/windingwind/zotero-actions-tags/discussions/559
 * @update 11 February 2026, 11:46
 */

const zoteroPane = Zotero.getActiveZoteroPane();
const selectedCollection = zoteroPane.getSelectedCollection();

// Recursive function to expand a collection and all its children
async function collapseCollectionAndChildren(collectionID) {
    const rowIndex = zoteroPane.collectionsView.getRowIndexByID(`C${collectionID}`);
    
    // Get and collapse all child collections
    const childCollections = Zotero.Collections.getByParent(collectionID);
    for (let child of childCollections) {
        await collapseCollectionAndChildren(child.id);
    }
    
    if (rowIndex !== false && zoteroPane.collectionsView.isContainerOpen(rowIndex)) {
        await zoteroPane.collectionsView.toggleOpenState(rowIndex);
    }

}

// Check if a collection is selected
if (selectedCollection) {
    // Expand the selected collection and all its subcollections
    await collapseCollectionAndChildren(selectedCollection.id);
    //return `Expanded all subcollections of "${selectedCollection.name}"`;
}

[mjthoraval]

I have now added improved versions that are also working on items, for expanding (#562) and collapsing (#563).