Remote components (External design systems) (#140)

* remote components processing

* changeset

* fixes

* fixes

* fixes

* fixes

* fix everything

* revert for now

* fixes

* change delete nodes flag

---------

Co-authored-by: Jordi Sala Morales <jordism91@gmail.com>

.changeset/early-lamps-report.md

@@ -0,0 +1,5 @@
+---
+"penpot-exporter": minor
+---
+
+Remote components processing

plugin-src/RemoteComponentLibrary.ts

@@ -0,0 +1,30 @@
+class RemoteComponentsLibrary {
+  private components: Record<string, ComponentNode | ComponentSetNode> = {};
+  private queue: string[] = [];
+
+  public register(id: string, component: ComponentNode | ComponentSetNode) {
+    if (!Object.prototype.hasOwnProperty.call(this.components, id)) {
+      this.queue.push(id);
+    }
+
+    this.components[id] = component;
+  }
+
+  public get(id: string): ComponentNode | ComponentSetNode | undefined {
+    return this.components[id];
+  }
+
+  public next(): ComponentNode | ComponentSetNode {
+    const lastKey = this.queue.pop();
+
+    if (!lastKey) throw new Error('No components to pop');
+
+    return this.components[lastKey];
+  }
+
+  public remaining(): number {
+    return this.queue.length;
+  }
+}
+
+export const remoteComponentLibrary = new RemoteComponentsLibrary();

plugin-src/transformers/transformComponentNode.ts

@@ -23,6 +23,7 @@ export const transformComponentNode = async (
     type: 'component',
     name: node.name,
     path: node.parent?.type === 'COMPONENT_SET' ? node.parent.name : '',
+    showContent: !node.clipsContent,
     ...transformFigmaIds(node),
     ...transformFills(node),
     ...transformEffects(node),

plugin-src/transformers/transformDocumentNode.ts

@@ -1,5 +1,7 @@
 import { componentsLibrary } from '@plugin/ComponentLibrary';
 import { imagesLibrary } from '@plugin/ImageLibrary';
+import { remoteComponentLibrary } from '@plugin/RemoteComponentLibrary';
+import { translateRemoteChildren } from '@plugin/translators';
 import { sleep } from '@plugin/utils';
 
 import { PenpotDocument } from '@ui/types';
@@ -28,6 +30,13 @@ export const transformDocumentNode = async (node: DocumentNode): Promise<PenpotD
     await sleep(0);
   }
 
+  if (remoteComponentLibrary.remaining() > 0) {
+    children.push({
+      name: 'External Components',
+      children: await translateRemoteChildren()
+    });
+  }
+
   const images: Record<string, Uint8Array> = {};
 
   for (const [key, image] of Object.entries(imagesLibrary.all())) {

plugin-src/transformers/transformInstanceNode.ts

@@ -1,3 +1,4 @@
+import { remoteComponentLibrary } from '@plugin/RemoteComponentLibrary';
 import {
   transformBlend,
   transformChildren,
@@ -24,11 +25,16 @@ export const transformInstanceNode = async (
     return;
   }
 
+  if (isExternalComponent(mainComponent)) {
+    await registerExternalComponents(mainComponent);
+  }
+
   return {
     type: 'instance',
     name: node.name,
     mainComponentFigmaId: mainComponent.id,
     isComponentRoot: isComponentRoot(node),
+    showContent: !node.clipsContent,
     ...transformFigmaIds(node),
     ...transformFills(node),
     ...transformEffects(node),
@@ -42,19 +48,39 @@ export const transformInstanceNode = async (
   };
 };
 
+const registerExternalComponents = async (mainComponent: ComponentNode): Promise<void> => {
+  let component: ComponentSetNode | ComponentNode = mainComponent;
+
+  if (component.parent?.type === 'COMPONENT_SET') {
+    component = component.parent;
+  }
+
+  if (remoteComponentLibrary.get(component.id) !== undefined) {
+    return;
+  }
+
+  remoteComponentLibrary.register(component.id, component);
+};
+
+const isExternalComponent = (mainComponent: ComponentNode): boolean => {
+  return (
+    mainComponent.remote ||
+    (mainComponent.parent?.type === 'COMPONENT_SET' && mainComponent.parent.remote)
+  );
+};
+
 /**
  * We do not want to process component instances in the following scenarios:
  *
- * 1. If the component comes from an external design system.
+ * 1. If the component does not have a parent. (it's been removed)
- * 2. If the component does not have a parent. (it's been removed)
+ * 2. Main component can be in a ComponentSet (the same logic applies to the parent).
- * 3. Main component can be in a ComponentSet (the same logic applies to the parent).
  */
 const isUnprocessableComponent = (mainComponent: ComponentNode): boolean => {
   return (
-    mainComponent.remote ||
+    (mainComponent.parent === null && !mainComponent.remote) ||
-    mainComponent.parent === null ||
     (mainComponent.parent?.type === 'COMPONENT_SET' &&
-      (mainComponent.parent.parent === null || mainComponent.parent.remote))
+      mainComponent.parent.parent === null &&
+      !mainComponent.parent.remote)
   );
 };
 

plugin-src/translators/translateChildren.ts

@@ -1,3 +1,4 @@
+import { remoteComponentLibrary } from '@plugin/RemoteComponentLibrary';
 import { transformGroupNodeLike, transformSceneNode } from '@plugin/transformers';
 import { transformMaskFigmaIds } from '@plugin/transformers/partials';
 import { sleep } from '@plugin/utils';
@@ -50,3 +51,19 @@ export const translateChildren = async (
 
   return transformedChildren;
 };
+
+export const translateRemoteChildren = async (): Promise<PenpotNode[]> => {
+  const transformedChildren: PenpotNode[] = [];
+
+  while (remoteComponentLibrary.remaining() > 0) {
+    const child = remoteComponentLibrary.next();
+
+    const penpotNode = await transformSceneNode(child);
+
+    if (penpotNode) transformedChildren.push(penpotNode);
+
+    await sleep(0);
+  }
+
+  return transformedChildren;
+};

ui-src/lib/types/shapes/componentShape.ts

@@ -19,6 +19,7 @@ export type ComponentAttributes = {
   type?: 'component';
   name: string;
   path: string;
+  showContent?: boolean;
   mainInstanceId?: Uuid;
   mainInstancePage?: Uuid;
 };

ui-src/parser/creators/createComponent.ts

@@ -17,7 +17,6 @@ export const createComponent = (file: PenpotFile, { figmaId }: ComponentRoot) =>
 
   const frameId = createArtboard(file, {
     ...component,
-    showContent: true,
     componentFile: file.getId(),
     componentId,
     componentRoot: true,

ui-src/parser/creators/createComponentInstance.ts

@@ -34,7 +34,6 @@ export const createComponentInstance = (
 
   createArtboard(file, {
     ...rest,
-    showContent: true,
     shapeRef: uiComponent.mainInstanceId,
     componentFile: file.getId(),
     componentRoot: isComponentRoot,

ui-src/types/component.ts

@@ -16,5 +16,6 @@ export type ComponentInstance = ShapeGeomAttributes &
     figmaId?: string;
     figmaRelatedId?: string;
     isComponentRoot: boolean;
+    showContent?: boolean;
     type: 'instance';
   };