ItemSelectionProvider: promote toot expansion

state

* used in Profile, TrendTimelinePanel,
  TimelinePanel

src/profiles/Profile.tsx

@@ -58,6 +58,10 @@ import Menu, { createManagedMenuState } from "~material/Menu";
 import { share } from "~platform/share";
 import "./Profile.css";
 import { useNavigator } from "~platform/StackedRouter";
+import {
+  createSingluarItemSelection,
+  default as ItemSelectionProvider,
+} from "../timelines/toots/ItemSelectionProvider";
 
 const Profile: Component = () => {
   const { pop } = useNavigator();
@@ -70,6 +74,7 @@ const Profile: Component = () => {
   }>();
   const windowSize = useWindowSize();
   const time = createTimeSource();
+  const [, selectionState] = createSingluarItemSelection();
 
   const menuButId = createUniqueId();
   const recentTootListId = createUniqueId();
@@ -499,22 +504,26 @@ const Profile: Component = () => {
           ></TootFilterButton>
         </div>
 
-        <TimeSourceProvider value={time}>
-          <Show when={recentTootFilter().pinned && pinnedToots.list.length > 0}>
+        <ItemSelectionProvider value={selectionState}>
+          <TimeSourceProvider value={time}>
+            <Show
+              when={recentTootFilter().pinned && pinnedToots.list.length > 0}
+            >
+              <TootList
+                threads={pinnedToots.list}
+                onUnknownThread={pinnedToots.getPath}
+                onChangeToot={pinnedToots.set}
+              />
+              <Divider />
+            </Show>
             <TootList
-              threads={pinnedToots.list}
-              onUnknownThread={pinnedToots.getPath}
-              onChangeToot={pinnedToots.set}
+              id={recentTootListId}
+              threads={recentToots.list}
+              onUnknownThread={recentToots.getPath}
+              onChangeToot={recentToots.set}
             />
-            <Divider />
-          </Show>
-          <TootList
-            id={recentTootListId}
-            threads={recentToots.list}
-            onUnknownThread={recentToots.getPath}
-            onChangeToot={recentToots.set}
-          />
-        </TimeSourceProvider>
+          </TimeSourceProvider>
+        </ItemSelectionProvider>
 
         <Show when={!recentTootChunk()?.done}>
           <div

src/timelines/Home.tsx

@@ -26,11 +26,18 @@ import { useStore } from "@nanostores/solid";
 import TrendTimelinePanel from "./TrendTimelinePanel";
 import TimelinePanel from "./TimelinePanel";
 import { useSessions } from "../masto/clients";
+import {
+  createSingluarItemSelection,
+  default as ItemSelectionProvider,
+} from "./toots/ItemSelectionProvider";
 
 const Home: ParentComponent = (props) => {
   let panelList: HTMLDivElement;
   useDocumentTitle("Timelines");
   const now = createTimeSource();
+  const [, selectionState] = createSingluarItemSelection(
+    undefined as string | undefined,
+  );
 
   const settings$ = useStore($settings);
 
@@ -115,7 +122,6 @@ const Home: ParentComponent = (props) => {
     }
   };
 
-
   css`
     .tab-panel {
       overflow: visible auto;
@@ -195,40 +201,42 @@ const Home: ParentComponent = (props) => {
           </AppBar>
         }
       >
-        <TimeSourceProvider value={now}>
-          <Show when={!!client()}>
-            <div
-              class="panel-list"
-              ref={panelList!}
-              onScroll={requestRecalculateTabIndicator}
-            >
-              <div class="tab-panel">
-                <div>
-                  <TimelinePanel
-                    client={client()}
-                    name="home"
-                    prefetch={prefetching()}
-                  />
+        <ItemSelectionProvider value={selectionState}>
+          <TimeSourceProvider value={now}>
+            <Show when={!!client()}>
+              <div
+                class="panel-list"
+                ref={panelList!}
+                onScroll={requestRecalculateTabIndicator}
+              >
+                <div class="tab-panel">
+                  <div>
+                    <TimelinePanel
+                      client={client()}
+                      name="home"
+                      prefetch={prefetching()}
+                    />
+                  </div>
                 </div>
-              </div>
-              <div class="tab-panel">
-                <div>
-                  <TrendTimelinePanel client={client()} />
+                <div class="tab-panel">
+                  <div>
+                    <TrendTimelinePanel client={client()} />
+                  </div>
                 </div>
-              </div>
-              <div class="tab-panel">
-                <div>
-                  <TimelinePanel
-                    client={client()}
-                    name="public"
-                    prefetch={prefetching()}
-                  />
+                <div class="tab-panel">
+                  <div>
+                    <TimelinePanel
+                      client={client()}
+                      name="public"
+                      prefetch={prefetching()}
+                    />
+                  </div>
                 </div>
+                <div></div>
               </div>
-              <div></div>
-            </div>
-          </Show>
-        </TimeSourceProvider>
+            </Show>
+          </TimeSourceProvider>
+        </ItemSelectionProvider>
       </Scaffold>
     </>
   );

src/timelines/RegularToot.tsx

@@ -4,7 +4,6 @@ import {
   type Component,
   type JSX,
   Show,
-  createRenderEffect,
   createSignal,
   type Setter,
   createContext,

src/timelines/TootList.tsx

@@ -7,6 +7,7 @@ import {
   Index,
   createMemo,
   For,
+  createUniqueId,
 } from "solid-js";
 import { type mastodon } from "masto";
 import { vibrate } from "~platform/hardware";
@@ -21,6 +22,7 @@ import cardStyle from "~material/cards.module.css";
 import type { ThreadNode } from "../masto/timelines";
 import { useNavigator } from "~platform/StackedRouter";
 import { ANIM_CURVE_STD } from "~material/theme";
+import { useItemSelection } from "./toots/ItemSelectionProvider";
 
 function durationOf(rect0: DOMRect, rect1: DOMRect) {
   const distancelt = Math.sqrt(
@@ -45,6 +47,9 @@ function positionTootInThread(index: number, threadLength: number) {
   return "middle";
 }
 
+/**
+ * Full-feature toot list.
+ */
 const TootList: Component<{
   ref?: Ref<HTMLDivElement>;
   id?: string;
@@ -53,7 +58,7 @@ const TootList: Component<{
   onChangeToot: (id: string, value: mastodon.v1.Status) => void;
 }> = (props) => {
   const session = useDefaultSession();
-  const [expandedThreadId, setExpandedThreadId] = createSignal<string>();
+  const [isExpanded, setExpanded] = useItemSelection();
   const { push } = useNavigator();
 
   const onBookmark = async (status: mastodon.v1.Status) => {
@@ -190,7 +195,7 @@ const TootList: Component<{
       event.currentTarget,
     );
 
-    if (actionableElement && checkIsExpended(status)) {
+    if (actionableElement && isExpanded(event.currentTarget.id)) {
       if (actionableElement.dataset.action === "acct") {
         event.stopPropagation();
 
@@ -214,18 +219,13 @@ const TootList: Component<{
     }
 
     // else if (!actionableElement || !checkIsExpended(status) || <rel is not one of known action>)
-    if (status.id !== expandedThreadId()) {
-      setExpandedThreadId((x) => (x ? undefined : status.id));
+    if (!isExpanded(event.currentTarget.id)) {
+      setExpanded(event.currentTarget.id);
     } else {
       openFullScreenToot(status, event.currentTarget as HTMLElement);
     }
   };
 
-  const checkIsExpendedId = createSelector(expandedThreadId);
-
-  const checkIsExpended = (status: mastodon.v1.Status) =>
-    checkIsExpendedId(status.id);
-
   const reply = (
     status: mastodon.v1.Status,
     event: { currentTarget: HTMLElement },
@@ -234,10 +234,7 @@ const TootList: Component<{
     openFullScreenToot(status, element, true);
   };
 
-  const vote = async (
-    status: mastodon.v1.Status,
-    votes: readonly number[]
-  ) => {
+  const vote = async (status: mastodon.v1.Status, votes: readonly number[]) => {
     const client = session()?.client;
     if (!client) return;
 
@@ -271,13 +268,15 @@ const TootList: Component<{
         return <p>Oops: {String(err)}</p>;
       }}
     >
-      <TootEnvProvider value={{
-        boost: toggleBoost,
-        bookmark: onBookmark,
-        favourite: toggleFavourite,
-        reply: reply,
-        vote: vote
-      }}>
+      <TootEnvProvider
+        value={{
+          boost: toggleBoost,
+          bookmark: onBookmark,
+          favourite: toggleFavourite,
+          reply: reply,
+          vote: vote,
+        }}
+      >
         <div ref={props.ref} id={props.id} class="toot-list">
           <For each={props.threads}>
             {(threadId, threadIdx) => {
@@ -291,11 +290,13 @@ const TootList: Component<{
                 <Index each={thread()}>
                   {(threadNode, index) => {
                     const status = () => threadNode().value;
+                    const id = createUniqueId();
 
                     return (
                       <RegularToot
                         data-status-id={status().id}
                         data-thread-sort={index}
+                        id={id}
                         status={status()}
                         thread={
                           threadLength() > 1
@@ -303,8 +304,8 @@ const TootList: Component<{
                             : undefined
                         }
                         class={cardStyle.card}
-                        evaluated={checkIsExpended(status())}
-                        actionable={checkIsExpended(status())}
+                        evaluated={isExpanded(id)}
+                        actionable={isExpanded(id)}
                         onClick={[onItemClick, status()]}
                       />
                     );

src/timelines/toots/ItemSelectionProvider.ts

@@ -0,0 +1,35 @@
+import {
+  createContext,
+  createSelector,
+  createSignal,
+  useContext,
+  type Accessor,
+} from "solid-js";
+
+export type ItemSelectionState<T> = [(value: T) => boolean, (value: T) => void];
+
+const ItemSelectionContext = /* @__PURE__ */ createContext<
+  ItemSelectionState<any>
+>([() => false, () => undefined]);
+
+export function createSingluarItemSelection<T extends {}>(
+  intial?: T,
+): readonly [Accessor<T | undefined>, ItemSelectionState<T | undefined>] {
+  const [value, setValue] = createSignal<T | undefined>(intial);
+
+  const select = createSelector(value, (a, b) =>
+    typeof b !== "undefined" ? a === b : false,
+  );
+
+  const toggle = (v: T | undefined) => {
+    setValue((o) => (o ? undefined : v));
+  };
+
+  return [value, [select, toggle]];
+}
+
+export function useItemSelection() {
+  return useContext(ItemSelectionContext);
+}
+
+export default ItemSelectionContext.Provider;