move preferred pane function to be used by solid panes and folder pane

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "solid-ui",
-	"version": "5.0.2-3",
+	"version": "5.0.2-4",
 	"description": "UI library for Solid applications",
 	"main": "dist/index.cjs.js",
 	"types": "dist/index.d.ts",

src/lib/file-explorer/relevant-panes.ts

@@ -1,6 +1,7 @@
 import type { DataBrowserContext, PaneDefinition } from 'pane-registry'
 import type { NamedNode } from 'rdflib'
 import { filterAvailablePanes } from '@/login/login'
+import ns from '@/lib/ns'
 
 export type RelevantPaneOptions = {
   excludedPaneNames?: readonly string[]
@@ -43,3 +44,25 @@ export async function getRelevantPanes (
     ? [relevantPanes[0]].concat(filteredPanes)
     : filteredPanes
 }
+
+/**
+ * Chooses the default pane from the relevant panes for a resource.
+ *
+ * A resource's `ui:mintClass` is an explicit declaration of the pane that
+ * created it, so it takes precedence over panes that merely request focus.
+ */
+export function getPreferredPane (
+  subject: NamedNode,
+  context: DataBrowserContext,
+  relevantPanes: PaneDefinition[]
+): PaneDefinition | undefined {
+  const store = context.session.store
+  const mintClass = store.any(subject, ns.ui('mintClass'), undefined, subject.doc()) ||
+    store.any(subject.doc(), ns.ui('mintClass'), undefined, subject.doc())
+  if (mintClass) {
+    const mintClassPane = relevantPanes.find(pane => pane.mintClass?.sameTerm(mintClass))
+    if (mintClassPane) return mintClassPane
+  }
+
+  return relevantPanes.find(pane => pane.shouldGetFocus?.(subject)) || relevantPanes[0]
+}

test/unit/file-explorer/relevant-panes.test.ts

@@ -3,7 +3,8 @@ import type { DataBrowserContext, PaneDefinition } from 'pane-registry'
 import { sym } from 'rdflib'
 import { solidLogicSingleton } from 'solid-logic'
 import { filterAvailablePanes } from '../../../src/login/login'
-import { getRelevantPanes } from '../../../src/lib/file-explorer/relevant-panes'
+import ns from '../../../src/lib/ns'
+import { getPreferredPane, getRelevantPanes } from '../../../src/lib/file-explorer/relevant-panes'
 
 vi.mock('../../../src/login/login', () => ({
   filterAvailablePanes: vi.fn()
@@ -128,3 +129,52 @@ describe('getRelevantPanes', () => {
     await expect(getRelevantPanes(subject, createContext([createPane('first')]))).rejects.toBe(error)
   })
 })
+
+describe('getPreferredPane', () => {
+  function contextWithMintClass (mintClass?: string): DataBrowserContext {
+    const store = Object.create(solidLogicSingleton.store)
+    store.any = vi.fn((candidate, predicate) => {
+      if (mintClass && candidate.sameTerm(subject) && predicate.sameTerm(ns.ui('mintClass'))) {
+        return sym(mintClass)
+      }
+      return undefined
+    })
+    return {
+      dom: document,
+      getOutliner: () => undefined,
+      session: {
+        logic: solidLogicSingleton,
+        store,
+        paneRegistry: {
+          list: [],
+          paneForIcon: {},
+          paneForPredicate: {},
+          register: vi.fn(),
+          byName: () => null
+        }
+      }
+    }
+  }
+
+  it('prefers the pane matching a resource mint class over a focus request', () => {
+    const mintClass = sym('https://schema.example/PhotoAlbum')
+    const focus = createPane('focus', { shouldGetFocus: () => true })
+    const minted = createPane('album', { mintClass })
+
+    expect(getPreferredPane(subject, contextWithMintClass(mintClass.uri), [focus, minted])).toBe(minted)
+  })
+
+  it('uses a focus request when no relevant pane matches the mint class', () => {
+    const focus = createPane('focus', { shouldGetFocus: () => true })
+    const other = createPane('other', { mintClass: sym('https://schema.example/Other') })
+
+    expect(getPreferredPane(subject, contextWithMintClass('https://schema.example/PhotoAlbum'), [other, focus])).toBe(focus)
+  })
+
+  it('falls back to registry order when no pane requests focus', () => {
+    const first = createPane('first')
+    const second = createPane('second')
+
+    expect(getPreferredPane(subject, contextWithMintClass(), [first, second])).toBe(first)
+  })
+})

test/unit/index.test.ts

@@ -37,6 +37,7 @@ describe('Index', () => {
       'dom',
       'fileExplorerContext',
       'generateId',
+      'getPreferredPane',
       'getRelevantPanes',
       'icons',
       'infiniteMessageArea',