Add ephemeral block support (#1275)

Ephemeral blocks can now be added to the LayoutModel for a tab. Only one ephemeral block can exist at a time. It is placed above all other blocks, including the magnified blocks. Updates how magnified and ephemeral blocks overlay the other blocks. Now, there's a blurred backdrop behind them that will obscure the other blocks. As a result of this, the overlayed blocks are now translucent.
2024-12-21 16:38:23 +01:00 · 2024-11-13 18:00:13 -08:00 · 2024-11-13 18:00:13 -08:00 · 3fcf209b52
commit 3fcf209b52
parent 31d0aa114d
10 changed files with 272 additions and 56 deletions
--- a/frontend/app/block/block.less
+++ b/frontend/app/block/block.less
@ -61,7 +61,7 @@
    }

    &.block-preview.block-frame-default .block-frame-default-inner .block-frame-default-header {
-        background-color: rgba(0, 0, 0, 0.7);
+        background-color: rgb(from var(--block-bg-color) r g b / 70%);
    }

    &.block-frame-default {
@ -254,7 +254,7 @@
            }

            .block-frame-preview {
-                background-color: rgba(0, 0, 0, 0.7);
+                background-color: rgb(from var(--block-bg-color) r g b / 70%);
                width: 100%;
                flex-grow: 1;
                border-bottom-left-radius: var(--block-border-radius);
@ -271,6 +271,12 @@
            }
        }

+        &.magnified,
+        &.ephemeral {
+            background-color: rgb(from var(--block-bg-color) r g b / 60%);
+            backdrop-filter: blur(10px);
+        }
+
        .connstatus-overlay {
            position: absolute;
            top: calc(var(--header-height) + 6px);
@ -385,7 +391,7 @@

            &.show-block-mask .block-mask-inner {
                margin-top: var(--header-height); // TODO fix this magic
-                background-color: rgba(0, 0, 0, 0.5);
+                background-color: rgb(from var(--block-bg-color) r g b / 50%);
                height: calc(100% - var(--header-height));
                width: 100%;
                display: flex;
--- a/frontend/app/block/blockframe.tsx
+++ b/frontend/app/block/blockframe.tsx
@ -120,6 +120,7 @@ function computeEndIcons(
    const endIconsElem: JSX.Element[] = [];
    const endIconButtons = util.useAtomValueSafe(viewModel?.endIconButtons);
    const magnified = jotai.useAtomValue(nodeModel.isMagnified);
+    const ephemeral = jotai.useAtomValue(nodeModel.isEphemeral);
    const numLeafs = jotai.useAtomValue(nodeModel.numLeafs);
    const magnifyDisabled = numLeafs <= 1;

@ -133,6 +134,17 @@ function computeEndIcons(
        click: onContextMenu,
    };
    endIconsElem.push(<IconButton key="settings" decl={settingsDecl} className="block-frame-settings" />);
+    if (ephemeral) {
+        const addToLayoutDecl: IconButtonDecl = {
+            elemtype: "iconbutton",
+            icon: "circle-plus",
+            title: "Add to Layout",
+            click: () => {
+                nodeModel.addEphemeralNodeToLayout();
+            },
+        };
+        endIconsElem.push(<IconButton key="add-to-layout" decl={addToLayoutDecl} />);
+    } else {
        endIconsElem.push(
            <OptMagnifyButton
                key="unmagnify"
@ -141,6 +153,8 @@ function computeEndIcons(
                disabled={magnifyDisabled}
            />
        );
+    }
+
    const closeDecl: IconButtonDecl = {
        elemtype: "iconbutton",
        icon: "xmark-large",
@ -166,6 +180,7 @@ const BlockFrame_Header = ({
    const preIconButton = util.useAtomValueSafe(viewModel?.preIconButton);
    let headerTextUnion = util.useAtomValueSafe(viewModel?.viewText);
    const magnified = jotai.useAtomValue(nodeModel.isMagnified);
+    const ephemeral = jotai.useAtomValue(nodeModel.isEphemeral);
    const manageConnection = util.useAtomValueSafe(viewModel?.manageConnection);
    const dragHandleRef = preview ? null : nodeModel.dragHandleRef;

@ -221,7 +236,12 @@ const BlockFrame_Header = ({
    }

    return (
-        <div className="block-frame-default-header" ref={dragHandleRef} onContextMenu={onContextMenu}>
+        <div
+            className="block-frame-default-header"
+            ref={dragHandleRef}
+            onContextMenu={onContextMenu}
+            draggable={!(preview || magnified || ephemeral)}
+        >
            {preIconButtonElem}
            <div className="block-frame-default-header-iconview">
                {viewIconElem}
@ -309,7 +329,6 @@ const ConnStatusOverlay = React.memo(
        const [overlayRefCallback, _, domRect] = useDimensionsWithCallbackRef(30);
        const width = domRect?.width;
        const [showError, setShowError] = React.useState(false);
-        const blockNum = jotai.useAtomValue(nodeModel.blockNum);

        React.useEffect(() => {
            if (width) {
@ -421,6 +440,8 @@ const BlockFrame_Default_Component = (props: BlockFrameProps) => {
        return jotai.atom(false);
    }) as jotai.PrimitiveAtom<boolean>;
    const connModalOpen = jotai.useAtomValue(changeConnModalAtom);
+    const isMagnified = jotai.useAtomValue(nodeModel.isMagnified);
+    const isEphemeral = jotai.useAtomValue(nodeModel.isEphemeral);

    const connBtnRef = React.useRef<HTMLDivElement>();
    React.useEffect(() => {
@ -476,6 +497,8 @@ const BlockFrame_Default_Component = (props: BlockFrameProps) => {
                "block-focused": isFocused || preview,
                "block-preview": preview,
                "block-no-highlight": numBlocksInTab === 1,
+                ephemeral: isEphemeral,
+                magnified: isMagnified,
            })}
            data-blockid={nodeModel.blockId}
            onClick={blockModel?.onClick}
--- a/frontend/app/store/global.ts
+++ b/frontend/app/store/global.ts
@ -341,17 +341,21 @@ function getApi(): ElectronApi {
    return (window as any).api;
 }

-async function createBlock(blockDef: BlockDef, magnified = false): Promise<string> {
+async function createBlock(blockDef: BlockDef, magnified = false, ephemeral = false): Promise<string> {
+    const tabId = globalStore.get(atoms.staticTabId);
+    const layoutModel = getLayoutModelForTabById(tabId);
    const rtOpts: RuntimeOpts = { termsize: { rows: 25, cols: 80 } };
    const blockId = await ObjectService.CreateBlock(blockDef, rtOpts);
+    if (ephemeral) {
+        layoutModel.newEphemeralNode(blockId);
+        return blockId;
+    }
    const insertNodeAction: LayoutTreeInsertNodeAction = {
        type: LayoutTreeActionType.InsertNode,
        node: newLayoutNode(undefined, undefined, undefined, { blockId }),
        magnified,
        focused: true,
    };
-    const tabId = globalStore.get(atoms.staticTabId);
-    const layoutModel = getLayoutModelForTabById(tabId);
    layoutModel.treeReducer(insertNodeAction);
    return blockId;
 }
--- a/frontend/app/theme.less
+++ b/frontend/app/theme.less
@ -56,10 +56,14 @@
    --zindex-tab-name: 3;
    --zindex-layout-display-container: 0;
    --zindex-layout-last-magnified-node: 1;
-    --zindex-layout-resize-handle: 2;
-    --zindex-layout-placeholder-container: 3;
-    --zindex-layout-overlay-container: 4;
-    --zindex-layout-magnified-node: 5;
+    --zindex-layout-last-ephemeral-node: 2;
+    --zindex-layout-resize-handle: 3;
+    --zindex-layout-placeholder-container: 4;
+    --zindex-layout-overlay-container: 5;
+    --zindex-layout-magnified-node-backdrop: 6;
+    --zindex-layout-magnified-node: 7;
+    --zindex-layout-ephemeral-node-backdrop: 8;
+    --zindex-layout-ephemeral-node: 9;
    --zindex-block-mask-inner: 10;
    --zindex-flash-error-container: 550;
    --zindex-app-background: -1;
--- a/frontend/app/view/waveai/waveai.tsx
+++ b/frontend/app/view/waveai/waveai.tsx
@ -240,7 +240,7 @@ export class WaveAiModel implements ViewModel {
                                file: path,
                            },
                        };
-                        await createBlock(blockDef, true);
+                        await createBlock(blockDef, false, true);
                    });
                },
            });
--- a/frontend/layout/lib/TileLayout.tsx
+++ b/frontend/layout/lib/TileLayout.tsx
@ -57,6 +57,7 @@ function TileLayoutComponent({ tabAtom, contents, getCursorPoint }: TileLayoutPr
    const setActiveDrag = useSetAtom(layoutModel.activeDrag);
    const setReady = useSetAtom(layoutModel.ready);
    const isResizing = useAtomValue(layoutModel.isResizing);
+    const ephemeralNode = useAtomValue(layoutModel.ephemeralNode);

    const { activeDrag, dragClientOffset } = useDragLayer((monitor) => ({
        activeDrag: monitor.isDragging(),
@ -121,6 +122,7 @@ function TileLayoutComponent({ tabAtom, contents, getCursorPoint }: TileLayoutPr
                <div key="display" ref={layoutModel.displayContainerRef} className="display-container">
                    <ResizeHandleWrapper layoutModel={layoutModel} />
                    <DisplayNodesWrapper layoutModel={layoutModel} />
+                    <NodeBackdrops layoutModel={layoutModel} />
                </div>
                <Placeholder key="placeholder" layoutModel={layoutModel} style={{ top: 10000, ...overlayTransform }} />
                <OverlayNodeWrapper layoutModel={layoutModel} />
@ -130,6 +132,55 @@ function TileLayoutComponent({ tabAtom, contents, getCursorPoint }: TileLayoutPr
 }
 export const TileLayout = memo(TileLayoutComponent) as typeof TileLayoutComponent;

+function NodeBackdrops({ layoutModel }: { layoutModel: LayoutModel }) {
+    const ephemeralNode = useAtomValue(layoutModel.ephemeralNode);
+    const magnifiedNodeId = useAtomValue(layoutModel.treeStateAtom).magnifiedNodeId;
+
+    const [showMagnifiedBackdrop, setShowMagnifiedBackdrop] = useState(!!ephemeralNode);
+    const [showEphemeralBackdrop, setShowEphemeralBackdrop] = useState(!!magnifiedNodeId);
+
+    const debouncedCallback = useCallback(
+        debounce(100, (callback: () => void) => callback()),
+        []
+    );
+
+    useEffect(() => {
+        if (magnifiedNodeId && !showMagnifiedBackdrop) {
+            debouncedCallback(() => setShowMagnifiedBackdrop(true));
+        }
+        if (!magnifiedNodeId) {
+            setShowMagnifiedBackdrop(false);
+        }
+        if (ephemeralNode && !showEphemeralBackdrop) {
+            debouncedCallback(() => setShowEphemeralBackdrop(true));
+        }
+        if (!ephemeralNode) {
+            setShowEphemeralBackdrop(false);
+        }
+    }, [ephemeralNode, magnifiedNodeId]);
+
+    return (
+        <>
+            {showMagnifiedBackdrop && (
+                <div
+                    className="magnified-node-backdrop"
+                    onClick={() => {
+                        layoutModel.magnifyNodeToggle(magnifiedNodeId);
+                    }}
+                />
+            )}
+            {showEphemeralBackdrop && (
+                <div
+                    className="ephemeral-node-backdrop"
+                    onClick={() => {
+                        layoutModel.closeNode(ephemeralNode?.id);
+                    }}
+                />
+            )}
+        </>
+    );
+}
+
 interface DisplayNodesWrapperProps {
    /**
     * The layout tree state.
@ -173,7 +224,6 @@ const DisplayNode = ({ layoutModel, node }: DisplayNodeProps) => {
        () => ({
            type: dragItemType,
            item: () => node,
-            canDrag: () => !addlProps?.isMagnifiedNode,
            collect: (monitor) => ({
                isDragging: monitor.isDragging(),
            }),
@ -243,8 +293,6 @@ const DisplayNode = ({ layoutModel, node }: DisplayNodeProps) => {
        <div
            className={clsx("tile-node", {
                dragging: isDragging,
-                magnified: addlProps?.isMagnifiedNode,
-                "last-magnified": addlProps?.isLastMagnifiedNode,
            })}
            key={node.id}
            ref={tileNodeRef}
--- a/frontend/layout/lib/layoutModel.ts
+++ b/frontend/layout/lib/layoutModel.ts
@ -171,6 +171,8 @@ export class LayoutModel {
     * Atom pointing to the currently focused node.
     */
    focusedNode: Atom<LayoutNode>;
+
+    // TODO: Nodes that need to be placed at higher z-indices should probably be handled by an ordered list, rather than individual properties.
    /**
     * The currently magnified node.
     */
@ -179,6 +181,14 @@ export class LayoutModel {
     * The last node to be magnified, other than the current magnified node, if set. This node should sit at a higher z-index than the others so that it floats above the other nodes as it returns to its original position.
     */
    lastMagnifiedNodeId: string;
+    /**
+     * Atom holding an ephemeral node that is not part of the layout tree. This node displays above all other nodes.
+     */
+    ephemeralNode: PrimitiveAtom<LayoutNode>;
+    /**
+     * The last node to be an ephemeral node. This node should sit at a higher z-index than the others so that it floats above the other nodes as it returns to its original position.
+     */
+    lastEphemeralNodeId: string;

    /**
     * The size of the resize handles, in CSS pixels.
@ -267,6 +277,8 @@ export class LayoutModel {
            }
        });

+        this.ephemeralNode = atom();
+
        this.focusedNode = atom((get) => {
            const treeState = get(this.treeStateAtom);
            if (treeState.focusedNodeId == null) {
@ -366,6 +378,7 @@ export class LayoutModel {
        if (this.lastTreeStateGeneration < this.treeState.generation) {
            if (this.magnifiedNodeId !== this.treeState.magnifiedNodeId) {
                this.lastMagnifiedNodeId = this.magnifiedNodeId;
+                this.lastEphemeralNodeId = undefined;
                this.magnifiedNodeId = this.treeState.magnifiedNodeId;
            }
            this.updateTree();
@ -486,11 +499,28 @@ export class LayoutModel {
                    ? (pendingAction as LayoutTreeResizeNodeAction)
                    : null;
            const resizeHandleSizePx = this.getter(this.resizeHandleSizePx);
+
+            const boundingRect = this.getBoundingRect();
+
            const callback = (node: LayoutNode) =>
-                this.updateTreeHelper(node, newAdditionalProps, newLeafs, resizeHandleSizePx, resizeAction);
+                this.updateTreeHelper(
+                    node,
+                    newAdditionalProps,
+                    newLeafs,
+                    resizeHandleSizePx,
+                    boundingRect,
+                    resizeAction
+                );
            if (balanceTree) this.treeState.rootNode = balanceNode(this.treeState.rootNode, callback);
            else walkNodes(this.treeState.rootNode, callback);

+            // Process ephemeral node, if present.
+            const ephemeralNode = this.getter(this.ephemeralNode);
+            if (ephemeralNode) {
+                console.log("updateTree ephemeralNode", ephemeralNode);
+                this.updateEphemeralNodeProps(ephemeralNode, newAdditionalProps, newLeafs, boundingRect);
+            }
+
            this.treeState.leafOrder = getLeafOrder(newLeafs, newAdditionalProps);
            this.validateFocusedNode(this.treeState.leafOrder);
            this.validateMagnifiedNode(this.treeState.leafOrder, newAdditionalProps);
@ -516,23 +546,14 @@ export class LayoutModel {
        additionalPropsMap: Record<string, LayoutNodeAdditionalProps>,
        leafs: LayoutNode[],
        resizeHandleSizePx: number,
+        boundingRect: Dimensions,
        resizeAction?: LayoutTreeResizeNodeAction
    ) {
-        /**
-         * Gets normalized dimensions for the TileLayout container.
-         * @returns The normalized dimensions for the TileLayout container.
-         */
-        const getBoundingRect: () => Dimensions = () => {
-            const boundingRect = this.displayContainerRef.current.getBoundingClientRect();
-            return { top: 0, left: 0, width: boundingRect.width, height: boundingRect.height };
-        };
-
        if (!node.children?.length) {
            leafs.push(node);
            const addlProps = additionalPropsMap[node.id];
            if (addlProps) {
                if (this.magnifiedNodeId === node.id) {
-                    const boundingRect = getBoundingRect();
                    const transform = setTransform(
                        {
                            top: boundingRect.height * 0.05,
@ -540,12 +561,17 @@ export class LayoutModel {
                            width: boundingRect.width * 0.9,
                            height: boundingRect.height * 0.9,
                        },
-                        true
+                        true,
+                        true,
+                        "var(--zindex-layout-magnified-node)"
                    );
                    addlProps.transform = transform;
-                    addlProps.isMagnifiedNode = true;
                }
-                addlProps.isLastMagnifiedNode = this.lastMagnifiedNodeId === node.id;
+                if (this.lastMagnifiedNodeId === node.id) {
+                    addlProps.transform.zIndex = "var(--zindex-layout-last-magnified-node)";
+                } else if (this.lastEphemeralNodeId === node.id) {
+                    addlProps.transform.zIndex = "var(--zindex-layout-last-ephemeral-node)";
+                }
            }
            return;
        }
@ -558,7 +584,7 @@ export class LayoutModel {
            ? additionalPropsMap[node.id]
            : { treeKey: "0" };

-        const nodeRect: Dimensions = node.id === this.treeState.rootNode.id ? getBoundingRect() : additionalProps.rect;
+        const nodeRect: Dimensions = node.id === this.treeState.rootNode.id ? boundingRect : additionalProps.rect;
        const nodeIsRow = node.flexDirection === FlexDirection.Row;
        const nodePixels = nodeIsRow ? nodeRect.width : nodeRect.height;
        const totalChildrenSize = node.children.reduce((acc, child) => acc + getNodeSize(child), 0);
@ -615,6 +641,15 @@ export class LayoutModel {
        };
    }

+    /**
+     * Gets normalized dimensions for the TileLayout container.
+     * @returns The normalized dimensions for the TileLayout container.
+     */
+    getBoundingRect: () => Dimensions = () => {
+        const boundingRect = this.displayContainerRef.current.getBoundingClientRect();
+        return { top: 0, left: 0, width: boundingRect.width, height: boundingRect.height };
+    };
+
    /**
     * The id of the focused node in the layout.
     */
@ -627,6 +662,7 @@ export class LayoutModel {
     * @param leafOrder The new leaf order array to use when searching for stale nodes in the stack.
     */
    private validateFocusedNode(leafOrder: LeafOrderEntry[]) {
+        console.log("validateFocusedNode", this.treeState.focusedNodeId, this.focusedNodeId, this.focusedNodeIdStack);
        if (this.treeState.focusedNodeId !== this.focusedNodeId) {
            // Remove duplicates and stale entries from focus stack.
            const newFocusedNodeIdStack: string[] = [];
@ -794,6 +830,11 @@ export class LayoutModel {
                    const treeState = get(this.treeStateAtom);
                    return treeState.magnifiedNodeId === nodeid;
                }),
+                isEphemeral: atom((get) => {
+                    const ephemeralNode = get(this.ephemeralNode);
+                    return ephemeralNode?.id === nodeid;
+                }),
+                addEphemeralNodeToLayout: () => this.addEphemeralNodeToLayout(),
                animationTimeS: this.animationTimeS,
                ready: this.ready,
                disablePointerEvents: this.activeDrag,
@ -907,11 +948,16 @@ export class LayoutModel {
     */
    focusNode(nodeId: string) {
        if (this.focusedNodeId === nodeId) return;
-        const layoutNode = findNode(this.treeState?.rootNode, nodeId);
+        let layoutNode = findNode(this.treeState?.rootNode, nodeId);
        if (!layoutNode) {
+            const ephemeralNode = this.getter(this.ephemeralNode);
+            if (ephemeralNode?.id === nodeId) {
+                layoutNode = ephemeralNode;
+            } else {
                console.error("unable to focus node, cannot find it in tree", nodeId);
                return;
            }
+        }
        const action: LayoutTreeFocusNodeAction = {
            type: LayoutTreeActionType.FocusNode,
            nodeId: nodeId,
@ -931,13 +977,16 @@ export class LayoutModel {
     * Toggle magnification of a given node.
     * @param nodeId The id of the node that is being magnified.
     */
-    magnifyNodeToggle(nodeId: string) {
+    magnifyNodeToggle(nodeId: string, setState = true) {
        const action: LayoutTreeMagnifyNodeToggleAction = {
            type: LayoutTreeActionType.MagnifyNodeToggle,
            nodeId: nodeId,
        };

-        this.treeReducer(action);
+        // Unset the last ephemeral node id to ensure the magnify animation sits on top of the layout.
+        this.lastEphemeralNodeId = undefined;
+
+        this.treeReducer(action, setState);
    }

    /**
@ -947,9 +996,23 @@ export class LayoutModel {
    async closeNode(nodeId: string) {
        const nodeToDelete = findNode(this.treeState.rootNode, nodeId);
        if (!nodeToDelete) {
+            // TODO: clean up the ephemeral node handling
+            // The ephemeral node is not in the tree, so we need to handle it separately.
+            const ephemeralNode = this.getter(this.ephemeralNode);
+            if (ephemeralNode?.id === nodeId) {
+                this.setter(this.ephemeralNode, undefined);
+                this.treeState.focusedNodeId = undefined;
+                this.updateTree(false);
+                this.setTreeStateAtom(true);
+                await this.onNodeDelete?.(ephemeralNode.data);
+                return;
+            }
            console.error("unable to close node, cannot find it in tree", nodeId);
            return;
        }
+        if (nodeId === this.magnifiedNodeId) {
+            this.magnifyNodeToggle(nodeId);
+        }
        const deleteAction: LayoutTreeDeleteNodeAction = {
            type: LayoutTreeActionType.DeleteNode,
            nodeId: nodeId,
@ -965,6 +1028,61 @@ export class LayoutModel {
        await this.closeNode(this.focusedNodeId);
    }

+    newEphemeralNode(blockId: string) {
+        if (this.getter(this.ephemeralNode)) {
+            this.closeNode(this.getter(this.ephemeralNode).id);
+        }
+
+        const ephemeralNode = newLayoutNode(undefined, undefined, undefined, { blockId });
+        this.setter(this.ephemeralNode, ephemeralNode);
+
+        const addlProps = this.getter(this.additionalProps);
+        const leafs = this.getter(this.leafs);
+        const boundingRect = this.getBoundingRect();
+        this.updateEphemeralNodeProps(ephemeralNode, addlProps, leafs, boundingRect);
+        this.setter(this.additionalProps, addlProps);
+        this.focusNode(ephemeralNode.id);
+    }
+
+    addEphemeralNodeToLayout() {
+        const ephemeralNode = this.getter(this.ephemeralNode);
+        this.setter(this.ephemeralNode, undefined);
+        if (this.magnifiedNodeId) {
+            this.magnifyNodeToggle(this.magnifiedNodeId, false);
+        }
+        this.lastEphemeralNodeId = ephemeralNode.id;
+        if (ephemeralNode) {
+            const action: LayoutTreeInsertNodeAction = {
+                type: LayoutTreeActionType.InsertNode,
+                node: ephemeralNode,
+                magnified: false,
+                focused: false,
+            };
+            this.treeReducer(action);
+        }
+    }
+
+    updateEphemeralNodeProps(
+        node: LayoutNode,
+        addlPropsMap: Record<string, LayoutNodeAdditionalProps>,
+        leafs: LayoutNode[],
+        boundingRect: Dimensions
+    ) {
+        const transform = setTransform(
+            {
+                top: boundingRect.height * 0.075,
+                left: boundingRect.width * 0.075,
+                width: boundingRect.width * 0.85,
+                height: boundingRect.height * 0.85,
+            },
+            true,
+            true,
+            "var(--zindex-layout-ephemeral-node)"
+        );
+        addlPropsMap[node.id] = { treeKey: "-1", transform };
+        leafs.push(node);
+    }
+
    /**
     * Callback that is invoked when a drag operation completes and the pending action should be committed.
     */
--- a/frontend/layout/lib/tilelayout.less
+++ b/frontend/layout/lib/tilelayout.less
@ -84,14 +84,6 @@
            backdrop-filter: blur(8px);
        }

-        &.magnified {
-            background-color: var(--block-bg-solid-color);
-            z-index: var(--zindex-layout-magnified-node);
-        }
-        &.last-magnified {
-            z-index: var(--zindex-layout-last-magnified-node);
-        }
-
        .tile-leaf {
            overflow: hidden;
        }
@ -109,11 +101,29 @@
            }
        }

-        &:not(:only-child, .magnified) .tile-leaf {
+        &:not(:only-child) .tile-leaf {
            padding: calc(var(--gap-size-px) / 2);
        }
    }

+    .magnified-node-backdrop,
+    .ephemeral-node-backdrop {
+        position: absolute;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        backdrop-filter: blur(2px);
+    }
+
+    .magnified-node-backdrop {
+        z-index: var(--zindex-layout-magnified-node-backdrop);
+    }
+
+    .ephemeral-node-backdrop {
+        z-index: var(--zindex-layout-ephemeral-node-backdrop);
+    }
+
    &.animate {
        .tile-node,
        .placeholder {
--- a/frontend/layout/lib/types.ts
+++ b/frontend/layout/lib/types.ts
@ -332,8 +332,7 @@ export interface LayoutNodeAdditionalProps {
    rect?: Dimensions;
    pixelToSizeRatio?: number;
    resizeHandles?: ResizeHandleProps[];
-    isMagnifiedNode?: boolean;
-    isLastMagnifiedNode?: boolean;
+    isLastEphemeralNode?: boolean;
 }

 export interface NodeModel {
@ -343,10 +342,12 @@ export interface NodeModel {
    numLeafs: Atom<number>;
    nodeId: string;
    blockId: string;
+    addEphemeralNodeToLayout: () => void;
    animationTimeS: Atom<number>;
    isResizing: Atom<boolean>;
    isFocused: Atom<boolean>;
    isMagnified: Atom<boolean>;
+    isEphemeral: Atom<boolean>;
    ready: Atom<boolean>;
    disablePointerEvents: Atom<boolean>;
    toggleMagnify: () => void;
--- a/frontend/layout/lib/utils.ts
+++ b/frontend/layout/lib/utils.ts
@ -61,7 +61,8 @@ export function determineDropDirection(dimensions?: Dimensions, offset?: XYCoord
 export function setTransform(
    { top, left, width, height }: Dimensions,
    setSize = true,
-    roundVals = true
+    roundVals = true,
+    zIndex?: number | string
 ): CSSProperties {
    // Replace unitless items with px
    const topRounded = roundVals ? Math.floor(top) : top;
@ -80,6 +81,7 @@ export function setTransform(
        width: setSize ? `${widthRounded}px` : undefined,
        height: setSize ? `${heightRounded}px` : undefined,
        position: "absolute",
+        zIndex: zIndex,
    };
 }