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[2090] Add the support for arrange all with reactflow
Bug: #2090 Signed-off-by: Guillaume Coutable <guillaume.coutable@obeo.fr>
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120 changes: 120 additions & 0 deletions
120
packages/diagrams/frontend/sirius-components-diagrams-reactflow/src/renderer/layout.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2023 Obeo. | ||
| * This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License v2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Obeo - initial API and implementation | ||
| *******************************************************************************/ | ||
|
|
||
| import ELK, { ElkExtendedEdge, ElkLabel, ElkNode, LayoutOptions } from 'elkjs/lib/elk.bundled.js'; | ||
| import { Edge, Node } from 'reactflow'; | ||
|
|
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| const elk = new ELK(); | ||
|
|
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| export const performLayout = ( | ||
| nodes: Node[], | ||
| edges: Edge[], | ||
| layoutOptions: LayoutOptions | ||
| ): Promise<{ nodes: Node[] }> => { | ||
| const graph: ElkNode = { | ||
| id: 'root', | ||
| layoutOptions, | ||
| children: [], | ||
| edges: [], | ||
| }; | ||
|
|
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| const nodeId2Node = new Map<string, Node>(); | ||
| nodes.forEach((node) => nodeId2Node.set(node.id, node)); | ||
|
|
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| const nodeId2ElkNode = new Map<String, ElkNode>(); | ||
| nodes.forEach((node) => { | ||
| const elkNode: ElkNode = { | ||
| id: node.id, | ||
| children: [], | ||
| labels: [], | ||
| layoutOptions: { | ||
| // TODO: compute label placement from style (flex, ect...) | ||
| 'nodeLabels.placement': '[H_CENTER, V_TOP, INSIDE]', | ||
| }, | ||
| }; | ||
| if (node.data?.label) { | ||
| const label = document.querySelector<HTMLDivElement>(`[data-id="${node.id}"] > div > div`); | ||
| const elkLabel: ElkLabel = { | ||
| width: label.getBoundingClientRect().width, | ||
| height: label.getBoundingClientRect().height, | ||
| text: node.data.label.text, | ||
| }; | ||
|
|
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| elkNode.labels.push(elkLabel); | ||
| } | ||
|
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| const element = document.querySelector(`[data-id="${node.id}"]`); | ||
| if (element) { | ||
| elkNode.width = element.clientWidth; | ||
| elkNode.height = element.clientHeight; | ||
| } | ||
|
|
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| nodeId2ElkNode.set(elkNode.id, elkNode); | ||
| }); | ||
|
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| nodes.forEach((node) => { | ||
| if (graph.children) { | ||
| if (!!node.parentNode) { | ||
| const elknodeChild = nodeId2ElkNode.get(node.id); | ||
| const elkNodeParent = nodeId2ElkNode.get(node.parentNode); | ||
| elkNodeParent.children.push(elknodeChild); | ||
| } else { | ||
| const elkNodeRoot = nodeId2ElkNode.get(node.id); | ||
| graph.children.push(elkNodeRoot); | ||
| } | ||
| } | ||
| }); | ||
|
|
||
| edges.forEach((edge) => { | ||
| if (graph.edges) { | ||
| const elkEdge: ElkExtendedEdge = { | ||
| id: edge.id, | ||
| sources: [edge.source], | ||
| targets: [edge.target], | ||
| }; | ||
| graph.edges.push(elkEdge); | ||
| } | ||
| }); | ||
|
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| return elk.layout(graph).then((layoutedGraph) => { | ||
| const nodes: Node[] = []; | ||
| elkToReactFlow(layoutedGraph.children ?? [], nodes, nodeId2Node); | ||
| return { | ||
| nodes, | ||
| }; | ||
| }); | ||
| }; | ||
|
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| const elkToReactFlow = (elkNodes: ElkNode[], nodes: Node[], nodeId2Node: Map<string, Node>) => { | ||
| elkNodes.map((elkNode) => { | ||
| const node = nodeId2Node.get(elkNode.id); | ||
| if (node) { | ||
| node.position.x = elkNode.x ?? 0; | ||
| node.position.y = elkNode.y ?? 0; | ||
| node.width = elkNode.width ?? 150; | ||
| node.height = elkNode.height ?? 70; | ||
| if (node.style) { | ||
| if (node.style.width) { | ||
| node.style.width = `${node.width}px`; | ||
| } | ||
| if (node.style.height) { | ||
| node.style.height = `${node.height}px`; | ||
| } | ||
| } | ||
| nodes.push(node); | ||
| } | ||
| if (elkNode?.children.length > 0) { | ||
| elkToReactFlow(elkNode.children, nodes, nodeId2Node); | ||
| } | ||
| }); | ||
| }; |