Feature: add "recently visited themes" on index page

langs/en.json

@@ -616,6 +616,7 @@
         "intro": "Maps about various topics which you can contribute to",
         "learnMore": "Learn more",
         "logIn": "Log in to see other themes you previously visited",
+        "recentThemes": "Recently visited themes",
         "title": "MapComplete"
     },
     "inspector": {

public/css/index-tailwind-output.css

@@ -1140,10 +1140,6 @@ input[type="range"].range-lg::-moz-range-thumb {
   position: absolute;
 }
 
-.\!relative {
-  position: relative !important;
-}
-
 .relative {
   position: relative;
 }
@@ -2565,6 +2561,10 @@ input[type="range"].range-lg::-moz-range-thumb {
   grid-template-columns: repeat(7, minmax(0, 1fr));
 }
 
+.grid-rows-2 {
+  grid-template-rows: repeat(2, minmax(0, 1fr));
+}
+
 .flex-row {
   flex-direction: row;
 }
@@ -8729,6 +8729,10 @@ svg.apply-fill path {
     grid-template-columns: repeat(3, minmax(0, 1fr));
   }
 
+  .md\:grid-rows-1 {
+    grid-template-rows: repeat(1, minmax(0, 1fr));
+  }
+
   .md\:flex-row {
     flex-direction: row;
   }

src/UI/AllThemesGui.svelte

@@ -27,6 +27,7 @@
   import { AndroidPolyfill } from "../Logic/Web/AndroidPolyfill"
   import Forgejo from "../assets/svg/Forgejo.svelte"
   import Locale from "./i18n/Locale"
+
   AndroidPolyfill.init().then(() => console.log("Android polyfill setup completed"))
   const featureSwitches = new OsmConnectionFeatureSwitches()
   const osmConnection = new OsmConnection({
@@ -35,13 +36,15 @@
       "oauth_token",
       undefined,
       "Used to complete the login"
-    ),
+    )
   })
   const state = new UserRelatedState(osmConnection)
   const t = Translations.t.index
   const tu = Translations.t.general
   const tr = Translations.t.general.morescreen
 
+  const recentThemes = state.recentlyVisitedThemes.value.mapD(themes => themes.map(thId => ThemeSearch.officialThemesById.get(thId)))
+
   let userLanguages = osmConnection.userDetails.map((ud) => ud?.languages ?? [])
   let search: UIEventSource<string | undefined> = new UIEventSource<string>("")
   let searchStable = search.stabilized(100)
@@ -64,6 +67,7 @@
   const customThemes: Store<MinimalThemeInformation[]> = Stores.ListStabilized<string>(
     state.installedUserThemes
   ).mapD((stableIds) => Utils.NoNullInplace(stableIds.map((id) => state.getUnofficialTheme(id))))
+
   function filtered(themes: Store<MinimalThemeInformation[]>): Store<MinimalThemeInformation[]> {
     const searchIndex = Locale.language.map(language => {
       return new ThemeSearchIndex(language, themes.data)
@@ -97,7 +101,7 @@
   let customSearched: Store<MinimalThemeInformation[]> = filtered(customThemes)
 
   let searchIsFocussed = new UIEventSource(false)
-  document.addEventListener("keydown", function (event) {
+  document.addEventListener("keydown", function(event) {
     if (event.ctrlKey && event.code === "KeyF") {
       searchIsFocussed.set(true)
       event.preventDefault()
@@ -162,6 +166,17 @@
       </div>
     </div>
 
+    <LoginToggle {state}>
+      {#if $recentThemes.length > 2}
+        <div class="my-4">
+          <h2>
+            <Tr t={Translations.t.index.recentThemes} />
+          </h2>
+          <ThemesList {state} themes={$recentThemes} onlyIcons />
+        </div>
+      {/if}
+    </LoginToggle>
+
     <Searchbar
       value={search}
       placeholder={tr.searchForATheme}

src/UI/BigComponents/ThemeButton.svelte

@@ -1,5 +1,4 @@
 <script lang="ts">
-  import { ImmutableStore, Store } from "../../Logic/UIEventSource"
   import { OsmConnection } from "../../Logic/Osm/OsmConnection"
   import type { MinimalThemeInformation } from "../../Models/ThemeConfig/ThemeConfig"
   import Tr from "../Base/Tr.svelte"
@@ -10,7 +9,7 @@
   export let theme: MinimalThemeInformation & { isOfficial?: boolean }
   let isCustom: boolean = theme.id.startsWith("https://") || theme.id.startsWith("http://")
   export let state: { layoutToUse?: { id: string }; osmConnection: OsmConnection }
-
+  export let iconOnly: boolean = false
   $: title = Translations.T(
     theme.title,
     !isCustom && !theme.mustHaveLanguage ? "themes:" + theme.id + ".title" : undefined
@@ -71,12 +70,17 @@
   )
 </script>
 
-<a class="low-interaction my-1 flex w-full items-center text-ellipsis rounded p-1" href={$href}>
-  <Marker icons={theme.icon} size="block h-8 w-8 sm:h-11 sm:w-11 m-1 sm:mx-2 md:mx-4 shrink-0" />
-
-  <span class="flex flex-col overflow-hidden text-ellipsis text-xl font-bold">
-    <Tr cls="" t={title} />
-    <Tr cls="subtle text-base" t={description} />
-    <slot />
-  </span>
-</a>
+{#if iconOnly}
+  <a class="low-interaction my-1 rounded p-1" href={$href}>
+    <Marker icons={theme.icon} size="w-8 h-8 sm:w-11 sm:h-11" />
+  </a>
+{:else}
+  <a class="low-interaction my-1 flex w-full items-center text-ellipsis rounded p-1" href={$href}>
+    <Marker icons={theme.icon} size="block h-8 w-8 sm:h-11 sm:w-11 m-1 sm:mx-2 md:mx-4 shrink-0" />
+    <span class="flex flex-col overflow-hidden text-ellipsis text-xl font-bold">
+      <Tr cls="" t={title} />
+      <Tr cls="subtle text-base" t={description} />
+      <slot />
+    </span>
+  </a>
+{/if}

src/UI/BigComponents/ThemesList.svelte

@@ -7,19 +7,21 @@
   import { MinimalThemeInformation } from "../../Models/ThemeConfig/ThemeConfig"
   import Translations from "../i18n/Translations"
   import Tr from "../Base/Tr.svelte"
+  import { twMerge } from "tailwind-merge"
 
-  export let search: UIEventSource<string>
+  export let search: UIEventSource<string> = new UIEventSource<string>(undefined)
   export let themes: MinimalThemeInformation[]
   export let state: { osmConnection: OsmConnection }
-
+  export let onlyIcons: boolean = false
   export let hasSelection: boolean = true
 </script>
 
 <section class="w-full">
   <slot name="title" />
-  <div class="theme-list my-2 gap-4 md:grid md:grid-flow-row md:grid-cols-2 lg:grid-cols-3">
+  <div
+    class={onlyIcons ? "flex gap-x-2 flex-wrap items-center justify-center" : ("theme-list my-2 gap-4 md:grid md:grid-flow-row md:grid-cols-2 lg:grid-cols-3")}>
     {#each themes as theme (theme.id)}
-      <ThemeButton {theme} {state}>
+      <ThemeButton {theme} {state} iconOnly={onlyIcons}>
         {#if $search && hasSelection && themes?.[0] === theme}
           <span class="thanks hidden-on-mobile" aria-hidden="true">
             <Tr t={Translations.t.general.morescreen.enterToOpen} />