Added usehasParent hook

packages/app/src/client/services/ContextExtractor.tsx

@@ -16,7 +16,7 @@ import {
   useIsDeleted, useIsNotCreatable, useIsTrashPage, useIsUserPage, useLastUpdateUsername,
   useCurrentPageId, usePageIdOnHackmd, usePageUser, useCurrentPagePath, useRevisionCreatedAt, useRevisionId, useRevisionIdHackmdSynced,
   useShareLinkId, useShareLinksNumber, useTemplateTagData, useCurrentUpdatedAt, useCreator, useRevisionAuthor, useCurrentUser, useTargetAndAncestors,
-  useSlackChannels, useNotFoundTargetPathOrId, useIsSearchPage, useIsForbidden, useIsIdenticalPath,
+  useSlackChannels, useNotFoundTargetPathOrId, useIsSearchPage, useIsForbidden, useIsIdenticalPath, useHasParent,
   useIsAclEnabled, useIsSearchServiceConfigured, useIsSearchServiceReachable, useIsEnabledAttachTitleHeader, useIsNotFoundPermalink,
 } from '../../stores/context';
 
@@ -70,6 +70,7 @@ const ContextExtractorOnce: FC = () => {
   const isForbidden = forbiddenContent != null;
   const pageUser = JSON.parse(mainContent?.getAttribute('data-page-user') || jsonNull);
   const hasChildren = JSON.parse(mainContent?.getAttribute('data-page-has-children') || jsonNull);
+  const hasParent = JSON.parse(mainContent?.getAttribute('data-has-parent') || jsonNull);
   const templateTagData = mainContent?.getAttribute('data-template-tags') || null;
   const shareLinksNumber = mainContent?.getAttribute('data-share-links-number');
   const shareLinkId = JSON.parse(mainContent?.getAttribute('data-share-link-id') || jsonNull);
@@ -141,6 +142,7 @@ const ContextExtractorOnce: FC = () => {
   useNotFoundTargetPathOrId(notFoundTargetPathOrId);
   useIsNotFoundPermalink(isNotFoundPermalink);
   useIsSearchPage(isSearchPage);
+  useHasParent(hasParent);
 
   // Navigation
   usePreferDrawerModeByUser();

packages/app/src/server/views/widget/page_content.html

@@ -25,6 +25,7 @@
   data-page-user="{% if pageUser %}{{ pageUser|json }}{% else %}null{% endif %}"
   data-share-links-number="{% if page %}{{ sharelinksNumber }}{% endif %}"
   data-share-link-id="{% if sharelink %}{{ sharelink._id|json }}{% endif %}"
+  data-has-parent="{{ page.parent != null }}"
   >
 {% else %}
 <div id="content-main" class="content-main d-flex"

packages/app/src/stores/context.tsx

@@ -156,6 +156,10 @@ export const useIsEnabledAttachTitleHeader = (initialData?: boolean) : SWRRespon
   return useStaticSWR<boolean, Error>('isEnabledAttachTitleHeader', initialData);
 };
 
+export const useHasParent = (initialData?: boolean) : SWRResponse<boolean, Error> => {
+  return useStaticSWR<boolean, Error>('hasParent', initialData);
+};
+
 
 /** **********************************************************
  *                     Computed contexts