« get me outta code hell

hsmusic-wiki - HSMusic - static wiki software cataloguing collaborative creation
about summary refs log tree commit diff
path: root/src/static/js/client/sidebar-search.js
diff options
context:
space:
mode:
Diffstat (limited to 'src/static/js/client/sidebar-search.js')
-rw-r--r--src/static/js/client/sidebar-search.js1147
1 files changed, 1147 insertions, 0 deletions
diff --git a/src/static/js/client/sidebar-search.js b/src/static/js/client/sidebar-search.js
new file mode 100644
index 00000000..fb902636
--- /dev/null
+++ b/src/static/js/client/sidebar-search.js
@@ -0,0 +1,1147 @@
+/* eslint-env browser */
+
+import {getColors} from '../../shared-util/colors.js';
+import {accumulateSum, empty} from '../../shared-util/sugar.js';
+
+import {
+  cssProp,
+  openAlbum,
+  openArtist,
+  openArtTag,
+  openFlash,
+  openGroup,
+  openTrack,
+  rebase,
+  templateContent,
+} from '../client-util.js';
+
+import {getLatestDraggedLink} from './dragged-link.js';
+
+import {
+  info as wikiSearchInfo,
+  getSearchWorkerDownloadContext,
+  searchAll,
+} from './wiki-search.js';
+
+export const info = {
+  id: 'sidebarSearchInfo',
+
+  pageContainer: null,
+
+  searchSidebarColumn: null,
+  searchBox: null,
+  searchLabel: null,
+  searchInput: null,
+
+  progressRule: null,
+  progressContainer: null,
+  progressLabel: null,
+  progressBar: null,
+
+  failedRule: null,
+  failedContainer: null,
+
+  resultsRule: null,
+  resultsContainer: null,
+  results: null,
+
+  endSearchRule: null,
+  endSearchLine: null,
+  endSearchLink: null,
+
+  standbyInputPlaceholder: null,
+
+  preparingString: null,
+  loadingDataString: null,
+  searchingString: null,
+  failedString: null,
+
+  noResultsString: null,
+  currentResultString: null,
+  endSearchString: null,
+
+  albumResultKindString: null,
+  artistResultKindString: null,
+  groupResultKindString: null,
+  tagResultKindString: null,
+
+  state: {
+    sidebarColumnShownForSearch: null,
+
+    tidiedSidebar: null,
+    collapsedDetailsForTidiness: null,
+
+    recallingRecentSearch: null,
+    recallingRecentSearchFromMouse: null,
+
+    currentValue: null,
+
+    workerStatus: null,
+    searchStage: null,
+
+    stoppedTypingTimeout: null,
+    stoppedScrollingTimeout: null,
+    focusFirstResultTimeout: null,
+    dismissChangeEventTimeout: null,
+
+    indexDownloadStatuses: Object.create(null),
+  },
+
+  session: {
+    activeQuery: {
+      type: 'string',
+    },
+
+    activeQueryResults: {
+      type: 'json',
+      maxLength: settings => settings.maxActiveResultsStorage,
+    },
+
+    repeatQueryOnReload: {
+      type: 'boolean',
+      default: false,
+    },
+
+    resultsScrollOffset: {
+      type: 'number',
+    },
+  },
+
+  settings: {
+    stoppedTypingDelay: 800,
+    stoppedScrollingDelay: 200,
+
+    pressDownToFocusFirstResultLatency: 500,
+    dismissChangeEventAfterFocusingFirstResultLatency: 50,
+
+    maxActiveResultsStorage: 100000,
+  },
+};
+
+export function getPageReferences() {
+  info.pageContainer =
+    document.getElementById('page-container');
+
+  info.searchBox =
+    document.querySelector('.wiki-search-sidebar-box');
+
+  if (!info.searchBox) {
+    return;
+  }
+
+  info.searchLabel =
+    info.searchBox.querySelector('.wiki-search-label');
+
+  info.searchInput =
+    info.searchBox.querySelector('.wiki-search-input');
+
+  info.searchSidebarColumn =
+    info.searchBox.closest('.sidebar-column');
+
+  info.standbyInputPlaceholder =
+    info.searchInput.placeholder;
+
+  const findString = classPart =>
+    info.searchBox.querySelector(`.wiki-search-${classPart}-string`);
+
+  info.preparingString =
+    findString('preparing');
+
+  info.loadingDataString =
+    findString('loading-data');
+
+  info.searchingString =
+    findString('searching');
+
+  info.failedString =
+    findString('failed');
+
+  info.noResultsString =
+    findString('no-results');
+
+  info.currentResultString =
+    findString('current-result');
+
+  info.endSearchString =
+    findString('end-search');
+
+  info.albumResultKindString =
+    findString('album-result-kind');
+
+  info.artistResultKindString =
+    findString('artist-result-kind');
+
+  info.groupResultKindString =
+    findString('group-result-kind');
+
+  info.tagResultKindString =
+    findString('tag-result-kind');
+}
+
+export function addInternalListeners() {
+  if (!info.searchBox) return;
+
+  wikiSearchInfo.event.whenWorkerAlive.push(
+    trackSidebarSearchWorkerAlive,
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenWorkerReady.push(
+    trackSidebarSearchWorkerReady,
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenWorkerFailsToInitialize.push(
+    trackSidebarSearchWorkerFailsToInitialize,
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenWorkerHasRuntimeError.push(
+    trackSidebarSearchWorkerHasRuntimeError,
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenDownloadsBegin.push(
+    trackSidebarSearchDownloadsBegin,
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenDownloadProgresses.push(
+    updateSidebarSearchStatus);
+
+  wikiSearchInfo.event.whenDownloadEnds.push(
+    trackSidebarSearchDownloadEnds,
+    updateSidebarSearchStatus);
+}
+
+export function mutatePageContent() {
+  if (!info.searchBox) return;
+
+  // Progress section
+
+  info.progressRule =
+    document.createElement('hr');
+
+  info.progressContainer =
+    document.createElement('div');
+
+  info.progressContainer.classList.add('wiki-search-progress-container');
+
+  cssProp(info.progressRule, 'display', 'none');
+  cssProp(info.progressContainer, 'display', 'none');
+
+  info.progressLabel =
+    document.createElement('label');
+
+  info.progressLabel.classList.add('wiki-search-progress-label');
+  info.progressLabel.htmlFor = 'wiki-search-progress-bar';
+
+  info.progressBar =
+    document.createElement('progress');
+
+  info.progressBar.classList.add('wiki-search-progress-bar');
+  info.progressBar.id = 'wiki-search-progress-bar';
+
+  info.progressContainer.appendChild(info.progressLabel);
+  info.progressContainer.appendChild(info.progressBar);
+
+  info.searchBox.appendChild(info.progressRule);
+  info.searchBox.appendChild(info.progressContainer);
+
+  // Search failed section
+
+  info.failedRule =
+    document.createElement('hr');
+
+  info.failedContainer =
+    document.createElement('div');
+
+  info.failedContainer.classList.add('wiki-search-failed-container');
+
+  {
+    const p = document.createElement('p');
+    p.appendChild(templateContent(info.failedString));
+    info.failedContainer.appendChild(p);
+  }
+
+  cssProp(info.failedRule, 'display', 'none');
+  cssProp(info.failedContainer, 'display', 'none');
+
+  info.searchBox.appendChild(info.failedRule);
+  info.searchBox.appendChild(info.failedContainer);
+
+  // Results section
+
+  info.resultsRule =
+    document.createElement('hr');
+
+  info.resultsContainer =
+    document.createElement('div');
+
+  info.resultsContainer.classList.add('wiki-search-results-container');
+
+  cssProp(info.resultsRule, 'display', 'none');
+  cssProp(info.resultsContainer, 'display', 'none');
+
+  info.results =
+    document.createElement('div');
+
+  info.results.classList.add('wiki-search-results');
+
+  info.resultsContainer.appendChild(info.results);
+
+  info.searchBox.appendChild(info.resultsRule);
+  info.searchBox.appendChild(info.resultsContainer);
+
+  // End search section
+
+  info.endSearchRule =
+    document.createElement('hr');
+
+  info.endSearchLine =
+    document.createElement('p');
+
+  info.endSearchLink =
+    document.createElement('a');
+
+  {
+    const p = info.endSearchLine;
+    const a = info.endSearchLink;
+    p.classList.add('wiki-search-end-search-line');
+    a.setAttribute('href', '#');
+    a.appendChild(templateContent(info.endSearchString));
+    p.appendChild(a);
+  }
+
+  cssProp(info.endSearchRule, 'display', 'none');
+  cssProp(info.endSearchLine, 'display', 'none');
+
+  info.searchBox.appendChild(info.endSearchRule);
+  info.searchBox.appendChild(info.endSearchLine);
+}
+
+export function addPageListeners() {
+  if (!info.searchInput) return;
+
+  info.searchInput.addEventListener('mousedown', _domEvent => {
+    const {state} = info;
+
+    if (state.recallingRecentSearch) {
+      state.recallingRecentSearchFromMouse = true;
+    }
+  });
+
+  info.searchInput.addEventListener('focus', _domEvent => {
+    const {session, state} = info;
+
+    if (state.recallingRecentSearch) {
+      info.searchInput.value = session.activeQuery;
+      info.searchInput.placeholder = info.standbyInputPlaceholder;
+      showSidebarSearchResults(session.activeQueryResults);
+      state.recallingRecentSearch = false;
+    }
+  });
+
+  info.searchLabel.addEventListener('click', domEvent => {
+    const {state} = info;
+
+    if (state.recallingRecentSearchFromMouse) {
+      if (info.searchInput.selectionStart === info.searchInput.selectionEnd) {
+        info.searchInput.select();
+      }
+
+      state.recallingRecentSearchFromMouse = false;
+      return;
+    }
+
+    const inputRect = info.searchInput.getBoundingClientRect();
+    if (domEvent.clientX < inputRect.left - 3) {
+      info.searchInput.select();
+    }
+  });
+
+  info.searchInput.addEventListener('change', _domEvent => {
+    const {state} = info;
+
+    if (state.dismissChangeEventTimeout) {
+      state.dismissChangeEventTimeout = null;
+      clearTimeout(state.dismissChangeEventTimeout);
+      return;
+    }
+
+    activateSidebarSearch(info.searchInput.value);
+  });
+
+  info.searchInput.addEventListener('input', _domEvent => {
+    const {settings, state} = info;
+
+    if (!info.searchInput.value) {
+      clearSidebarSearch();
+      return;
+    }
+
+    if (state.stoppedTypingTimeout) {
+      clearTimeout(state.stoppedTypingTimeout);
+    }
+
+    state.stoppedTypingTimeout =
+      setTimeout(() => {
+        state.stoppedTypingTimeout = null;
+        activateSidebarSearch(info.searchInput.value);
+      }, settings.stoppedTypingDelay);
+
+    if (state.focusFirstResultTimeout) {
+      clearTimeout(state.focusFirstResultTimeout);
+      state.focusFirstResultTimeout = null;
+    }
+  });
+
+  info.searchInput.addEventListener('drop', handleDroppedIntoSearchInput);
+
+  info.searchInput.addEventListener('keydown', domEvent => {
+    const {settings, state} = info;
+
+    if (domEvent.key === 'ArrowUp' || domEvent.key === 'ArrowDown') {
+      domEvent.preventDefault();
+    }
+
+    if (domEvent.key === 'ArrowDown') {
+      if (state.stoppedTypingTimeout) {
+        clearTimeout(state.stoppedTypingTimeout);
+        state.stoppedTypingTimeout = null;
+
+        if (state.focusFirstResultTimeout) {
+          clearTimeout(state.focusFirstResultTimeout);
+        }
+
+        state.focusFirstResultTimeout =
+          setTimeout(() => {
+            state.focusFirstResultTimeout = null;
+          }, settings.pressDownToFocusFirstResultLatency);
+
+        activateSidebarSearch(info.searchInput.value);
+      } else {
+        focusFirstSidebarSearchResult();
+      }
+    }
+  });
+
+  document.addEventListener('selectionchange', _domEvent => {
+    const {state} = info;
+
+    if (state.focusFirstResultTimeout) {
+      clearTimeout(state.focusFirstResultTimeout);
+      state.focusFirstResultTimeout = null;
+    }
+  });
+
+  info.endSearchLink.addEventListener('click', domEvent => {
+    domEvent.preventDefault();
+    clearSidebarSearch();
+    possiblyHideSearchSidebarColumn();
+    restoreSidebarSearchColumn();
+  });
+
+  info.resultsContainer.addEventListener('scroll', () => {
+    const {settings, state} = info;
+
+    if (state.stoppedScrollingTimeout) {
+      clearTimeout(state.stoppedScrollingTimeout);
+    }
+
+    state.stoppedScrollingTimeout =
+      setTimeout(() => {
+        saveSidebarSearchResultsScrollOffset();
+      }, settings.stoppedScrollingDelay);
+  });
+}
+
+export function initializeState() {
+  const {session} = info;
+
+  if (!info.searchInput) return;
+
+  if (session.activeQuery) {
+    if (session.repeatQueryOnReload) {
+      info.searchInput.value = session.activeQuery;
+      activateSidebarSearch(session.activeQuery);
+    } else if (session.activeQueryResults) {
+      considerRecallingRecentSidebarSearch();
+    }
+  }
+}
+
+function trackSidebarSearchWorkerAlive() {
+  const {state} = info;
+
+  state.workerStatus = 'alive';
+}
+
+function trackSidebarSearchWorkerReady() {
+  const {state} = info;
+
+  state.workerStatus = 'ready';
+  state.searchStage = 'searching';
+}
+
+function trackSidebarSearchWorkerFailsToInitialize() {
+  const {state} = info;
+
+  state.workerStatus = 'failed';
+  state.searchStage = 'failed';
+}
+
+function trackSidebarSearchWorkerHasRuntimeError() {
+  const {state} = info;
+
+  state.workerStatus = 'failed';
+  state.searchStage = 'failed';
+}
+
+function trackSidebarSearchDownloadsBegin(event) {
+  const {state} = info;
+
+  if (event.context === 'search-indexes') {
+    for (const key of event.keys) {
+      state.indexDownloadStatuses[key] = 'active';
+    }
+  }
+}
+
+function trackSidebarSearchDownloadEnds(event) {
+  const {state} = info;
+
+  if (event.context === 'search-indexes') {
+    state.indexDownloadStatuses[event.key] = 'complete';
+
+    const statuses = Object.values(state.indexDownloadStatuses);
+    if (statuses.every(status => status === 'complete')) {
+      for (const key of Object.keys(state.indexDownloadStatuses)) {
+        delete state.indexDownloadStatuses[key];
+      }
+    }
+  }
+}
+
+async function activateSidebarSearch(query) {
+  const {session, state} = info;
+
+  if (!query) {
+    return;
+  }
+
+  if (state.stoppedTypingTimeout) {
+    clearTimeout(state.stoppedTypingTimeout);
+    state.stoppedTypingTimeout = null;
+  }
+
+  state.searchStage =
+    (state.workerStatus === 'ready'
+      ? 'searching'
+      : 'preparing');
+  updateSidebarSearchStatus();
+
+  let results;
+  try {
+    results = await searchAll(query, {enrich: true});
+  } catch (error) {
+    console.error(`There was an error performing a sidebar search:`);
+    console.error(error);
+    showSidebarSearchFailed();
+    return;
+  }
+
+  state.searchStage = 'complete';
+  updateSidebarSearchStatus();
+
+  session.activeQuery = query;
+  session.activeQueryResults = results;
+  session.resultsScrollOffset = 0;
+
+  showSidebarSearchResults(results);
+
+  if (state.focusFirstResultTimeout) {
+    clearTimeout(state.focusFirstResultTimeout);
+    state.focusFirstResultTimeout = null;
+    focusFirstSidebarSearchResult();
+  }
+}
+
+function clearSidebarSearch() {
+  const {session, state} = info;
+
+  if (state.stoppedTypingTimeout) {
+    clearTimeout(state.stoppedTypingTimeout);
+    state.stoppedTypingTimeout = null;
+  }
+
+  info.searchBox.classList.remove('showing-results');
+  info.searchSidebarColumn.classList.remove('search-showing-results');
+
+  info.searchInput.value = '';
+
+  state.searchStage = null;
+
+  session.activeQuery = null;
+  session.activeQueryResults = null;
+  session.resultsScrollOffset = null;
+
+  hideSidebarSearchResults();
+}
+
+function updateSidebarSearchStatus() {
+  const {state} = info;
+
+  if (state.searchStage === 'failed') {
+    hideSidebarSearchResults();
+    showSidebarSearchFailed();
+
+    return;
+  }
+
+  const searchIndexDownloads =
+    getSearchWorkerDownloadContext('search-indexes');
+
+  const downloadProgressValues =
+    Object.values(searchIndexDownloads ?? {});
+
+  if (downloadProgressValues.some(v => v < 1.00)) {
+    const total = Object.keys(state.indexDownloadStatuses).length;
+    const sum = accumulateSum(downloadProgressValues);
+    showSidebarSearchProgress(
+      sum / total,
+      templateContent(info.loadingDataString));
+
+    return;
+  }
+
+  if (state.searchStage === 'preparing') {
+    showSidebarSearchProgress(
+      null,
+      templateContent(info.preparingString));
+
+    return;
+  }
+
+  if (state.searchStage === 'searching') {
+    showSidebarSearchProgress(
+      null,
+      templateContent(info.searchingString));
+
+    return;
+  }
+
+  hideSidebarSearchProgress();
+}
+
+function showSidebarSearchProgress(progress, label) {
+  cssProp(info.progressRule, 'display', null);
+  cssProp(info.progressContainer, 'display', null);
+
+  if (progress === null) {
+    info.progressBar.removeAttribute('value');
+  } else {
+    info.progressBar.value = progress;
+  }
+
+  while (info.progressLabel.firstChild) {
+    info.progressLabel.firstChild.remove();
+  }
+
+  info.progressLabel.appendChild(label);
+}
+
+function hideSidebarSearchProgress() {
+  cssProp(info.progressRule, 'display', 'none');
+  cssProp(info.progressContainer, 'display', 'none');
+}
+
+function showSidebarSearchFailed() {
+  const {state} = info;
+
+  hideSidebarSearchProgress();
+  hideSidebarSearchResults();
+
+  cssProp(info.failedRule, 'display', null);
+  cssProp(info.failedContainer, 'display', null);
+
+  info.searchLabel.classList.add('disabled');
+  info.searchInput.disabled = true;
+
+  if (state.stoppedTypingTimeout) {
+    clearTimeout(state.stoppedTypingTimeout);
+    state.stoppedTypingTimeout = null;
+  }
+}
+
+function showSidebarSearchResults(results) {
+  console.debug(`Showing search results:`, results);
+
+  showSearchSidebarColumn();
+
+  const flatResults =
+    Object.entries(results)
+      .filter(([index]) => index === 'generic')
+      .flatMap(([index, results]) => results
+        .flatMap(({doc, id}) => ({
+          index,
+          reference: id ?? null,
+          referenceType: (id ? id.split(':')[0] : null),
+          directory: (id ? id.split(':')[1] : null),
+          data: doc,
+        })));
+
+  info.searchBox.classList.add('showing-results');
+  info.searchSidebarColumn.classList.add('search-showing-results');
+
+  while (info.results.firstChild) {
+    info.results.firstChild.remove();
+  }
+
+  cssProp(info.resultsRule, 'display', 'block');
+  cssProp(info.resultsContainer, 'display', 'block');
+
+  if (empty(flatResults)) {
+    const p = document.createElement('p');
+    p.classList.add('wiki-search-no-results');
+    p.appendChild(templateContent(info.noResultsString));
+    info.results.appendChild(p);
+  }
+
+  for (const result of flatResults) {
+    const el = generateSidebarSearchResult(result);
+    if (!el) continue;
+
+    info.results.appendChild(el);
+  }
+
+  if (!empty(flatResults)) {
+    cssProp(info.endSearchRule, 'display', 'block');
+    cssProp(info.endSearchLine, 'display', 'block');
+
+    tidySidebarSearchColumn();
+  }
+
+  restoreSidebarSearchResultsScrollOffset();
+}
+
+function generateSidebarSearchResult(result) {
+  const preparedSlots = {
+    color:
+      result.data.color ?? null,
+
+    name:
+      result.data.name ?? result.data.primaryName ?? null,
+
+    imageSource:
+      getSearchResultImageSource(result),
+  };
+
+  switch (result.referenceType) {
+    case 'album': {
+      preparedSlots.href =
+        openAlbum(result.directory);
+
+      preparedSlots.kindString =
+        info.albumResultKindString;
+
+      break;
+    }
+
+    case 'artist': {
+      preparedSlots.href =
+        openArtist(result.directory);
+
+      preparedSlots.kindString =
+        info.artistResultKindString;
+
+      break;
+    }
+
+    case 'group': {
+      preparedSlots.href =
+        openGroup(result.directory);
+
+      preparedSlots.kindString =
+        info.groupResultKindString;
+
+      break;
+    }
+
+    case 'flash': {
+      preparedSlots.href =
+        openFlash(result.directory);
+
+      break;
+    }
+
+    case 'tag': {
+      preparedSlots.href =
+        openArtTag(result.directory);
+
+      preparedSlots.kindString =
+        info.tagResultKindString;
+
+      break;
+    }
+
+    case 'track': {
+      preparedSlots.href =
+        openTrack(result.directory);
+
+      break;
+    }
+
+    default:
+      return null;
+  }
+
+  return generateSidebarSearchResultTemplate(preparedSlots);
+}
+
+function getSearchResultImageSource(result) {
+  const {artwork} = result.data;
+  if (!artwork) return null;
+
+  return (
+    rebase(
+      artwork.replace('<>', result.directory),
+      'rebaseThumb'));
+}
+
+function generateSidebarSearchResultTemplate(slots) {
+  const link = document.createElement('a');
+  link.classList.add('wiki-search-result');
+
+  if (slots.href) {
+    link.setAttribute('href', slots.href);
+  }
+
+  if (slots.color) {
+    cssProp(link, '--primary-color', slots.color);
+
+    try {
+      const colors =
+        getColors(slots.color, {
+          chroma: window.chroma,
+        });
+      cssProp(link, '--light-ghost-color', colors.lightGhost);
+      cssProp(link, '--deep-color', colors.deep);
+    } catch (error) {
+      console.warn(error);
+    }
+  }
+
+  const imgContainer = document.createElement('span');
+  imgContainer.classList.add('wiki-search-result-image-container');
+
+  if (slots.imageSource) {
+    const img = document.createElement('img');
+    img.classList.add('wiki-search-result-image');
+    img.setAttribute('src', slots.imageSource);
+    imgContainer.appendChild(img);
+    if (slots.imageSource.endsWith('.mini.jpg')) {
+      img.classList.add('has-warning');
+    }
+  } else {
+    const placeholder = document.createElement('span');
+    placeholder.classList.add('wiki-search-result-image-placeholder');
+    imgContainer.appendChild(placeholder);
+  }
+
+  link.appendChild(imgContainer);
+
+  const text = document.createElement('span');
+  text.classList.add('wiki-search-result-text-area');
+
+  if (slots.name) {
+    const span = document.createElement('span');
+    span.classList.add('wiki-search-result-name');
+    span.appendChild(document.createTextNode(slots.name));
+    text.appendChild(span);
+  }
+
+  let accentSpan = null;
+
+  if (link.href) {
+    const here = location.href.replace(/\/$/, '');
+    const there = link.href.replace(/\/$/, '');
+    if (here === there) {
+      link.classList.add('current-result');
+      accentSpan = document.createElement('span');
+      accentSpan.classList.add('wiki-search-current-result-text');
+      accentSpan.appendChild(templateContent(info.currentResultString));
+    }
+  }
+
+  if (!accentSpan && slots.kindString) {
+    accentSpan = document.createElement('span');
+    accentSpan.classList.add('wiki-search-result-kind');
+    accentSpan.appendChild(templateContent(slots.kindString));
+  }
+
+  if (accentSpan) {
+    text.appendChild(document.createTextNode(' '));
+    text.appendChild(accentSpan);
+  }
+
+  link.appendChild(text);
+
+  link.addEventListener('click', () => {
+    saveSidebarSearchResultsScrollOffset();
+  });
+
+  link.addEventListener('keydown', domEvent => {
+    if (domEvent.key === 'ArrowDown') {
+      const elem = link.nextElementSibling;
+      if (elem) {
+        domEvent.preventDefault();
+        elem.focus({focusVisible: true});
+      }
+    } else if (domEvent.key === 'ArrowUp') {
+      domEvent.preventDefault();
+      const elem = link.previousElementSibling;
+      if (elem) {
+        elem.focus({focusVisible: true});
+      } else {
+        info.searchInput.focus();
+      }
+    }
+  });
+
+  return link;
+}
+
+function hideSidebarSearchResults() {
+  cssProp(info.resultsRule, 'display', 'none');
+  cssProp(info.resultsContainer, 'display', 'none');
+
+  while (info.results.firstChild) {
+    info.results.firstChild.remove();
+  }
+
+  cssProp(info.endSearchRule, 'display', 'none');
+  cssProp(info.endSearchLine, 'display', 'none');
+}
+
+function focusFirstSidebarSearchResult() {
+  const {settings, state} = info;
+
+  const elem = info.results.firstChild;
+  if (!elem?.classList.contains('wiki-search-result')) {
+    return;
+  }
+
+  if (state.dismissChangeEventTimeout) {
+    clearTimeout(state.dismissChangeEventTimeout);
+  }
+
+  state.dismissChangeEventTimeout =
+    setTimeout(() => {
+      state.dismissChangeEventTimeout = null;
+    }, settings.dismissChangeEventAfterFocusingFirstResultLatency);
+
+  elem.focus({focusVisible: true});
+}
+
+function saveSidebarSearchResultsScrollOffset() {
+  const {session} = info;
+
+  session.resultsScrollOffset = info.resultsContainer.scrollTop;
+}
+
+function restoreSidebarSearchResultsScrollOffset() {
+  const {session} = info;
+
+  if (session.resultsScrollOffset) {
+    info.resultsContainer.scrollTop = session.resultsScrollOffset;
+  }
+}
+
+function showSearchSidebarColumn() {
+  const {state} = info;
+
+  if (!info.searchSidebarColumn) {
+    return;
+  }
+
+  if (!info.searchSidebarColumn.classList.contains('initially-hidden')) {
+    return;
+  }
+
+  info.searchSidebarColumn.classList.remove('initially-hidden');
+
+  if (info.searchSidebarColumn.id === 'sidebar-left') {
+    info.pageContainer.classList.add('showing-sidebar-left');
+  } else if (info.searchSidebarColumn.id === 'sidebar-right') {
+    info.pageContainer.classList.add('showing-sidebar-right');
+  }
+
+  state.sidebarColumnShownForSearch = true;
+}
+
+function possiblyHideSearchSidebarColumn() {
+  const {state} = info;
+
+  if (!info.searchSidebarColumn) {
+    return;
+  }
+
+  if (!state.sidebarColumnShownForSearch) {
+    return;
+  }
+
+  info.searchSidebarColumn.classList.add('initially-hidden');
+
+  if (info.searchSidebarColumn.id === 'sidebar-left') {
+    info.pageContainer.classList.remove('showing-sidebar-left');
+  } else if (info.searchSidebarColumn.id === 'sidebar-right') {
+    info.pageContainer.classList.remove('showing-sidebar-right');
+  }
+
+  state.sidebarColumnShownForSearch = null;
+}
+
+// This should be called after results are shown, since it checks the
+// elements added to understand the current search state.
+function tidySidebarSearchColumn() {
+  const {state} = info;
+
+  // Don't *re-tidy* the sidebar if we've already tidied it to display
+  // some results. This flag will get cleared if the search is dismissed
+  // altogether (and the pre-tidy state is restored).
+  if (state.tidiedSidebar) {
+    return;
+  }
+
+  const here = location.href.replace(/\/$/, '');
+  const currentPageIsResult =
+    Array.from(info.results.querySelectorAll('a'))
+      .some(link => {
+        const there = link.href.replace(/\/$/, '');
+        return here === there;
+      });
+
+  // Don't tidy the sidebar if you've navigated to some other page than
+  // what's in the current result list.
+  if (!currentPageIsResult) {
+    return;
+  }
+
+  state.tidiedSidebar = true;
+  state.collapsedDetailsForTidiness = [];
+
+  for (const box of info.searchSidebarColumn.querySelectorAll('.sidebar')) {
+    if (box === info.searchBox) {
+      continue;
+    }
+
+    for (const details of box.getElementsByTagName('details')) {
+      if (details.open) {
+        details.removeAttribute('open');
+        state.collapsedDetailsForTidiness.push(details);
+      }
+    }
+  }
+}
+
+function restoreSidebarSearchColumn() {
+  const {state} = info;
+
+  if (!state.tidiedSidebar) {
+    return;
+  }
+
+  for (const details of state.collapsedDetailsForTidiness) {
+    details.setAttribute('open', '');
+  }
+
+  state.collapsedDetailsForTidiness = [];
+  state.tidiedSidebar = null;
+
+  info.searchInput.placeholder = info.standbyInputPlaceholder;
+}
+
+function considerRecallingRecentSidebarSearch() {
+  const {session, state} = info;
+
+  if (document.documentElement.dataset.urlKey === 'localized.home') {
+    return forgetRecentSidebarSearch();
+  }
+
+  info.searchInput.placeholder = session.activeQuery;
+  state.recallingRecentSearch = true;
+}
+
+function forgetRecentSidebarSearch() {
+  const {session} = info;
+
+  session.activeQuery = null;
+  session.activeQueryResults = null;
+}
+
+async function handleDroppedIntoSearchInput(domEvent) {
+  const itemByType = type =>
+    Array.from(domEvent.dataTransfer.items)
+      .find(item => item.type === type);
+
+  const textItem = itemByType('text/plain');
+
+  if (!textItem) return;
+
+  domEvent.preventDefault();
+
+  const getAssTring = item =>
+    new Promise(res => item.getAsString(res))
+      .then(string => string.trim());
+
+  const timer = Date.now();
+
+  let droppedText =
+    await getAssTring(textItem);
+
+  if (Date.now() - timer > 500) return;
+  if (!droppedText) return;
+
+  let droppedURL;
+  try {
+    droppedURL = new URL(droppedText);
+  } catch (error) {
+    droppedURL = null;
+  }
+
+  if (droppedURL) matchLink: {
+    const isDroppedURL = a =>
+      a.toString() === droppedURL.toString();
+
+    const matchingLinks =
+      Array.from(document.getElementsByTagName('a'))
+        .filter(a =>
+          isDroppedURL(new URL(a.href, document.documentURI)));
+
+    const latestDraggedLink = getLatestDraggedLink();
+
+    if (!matchingLinks.includes(latestDraggedLink)) {
+      break matchLink;
+    }
+
+    let matchedLink = latestDraggedLink;
+
+    if (matchedLink.querySelector('.normal-content')) {
+      matchedLink = matchedLink.cloneNode(true);
+      for (const node of matchedLink.querySelectorAll('.normal-content')) {
+        node.remove();
+      }
+    }
+
+    droppedText = matchedLink.innerText;
+  }
+
+  if (droppedText.includes('-')) splitDashes: {
+    if (droppedURL) break splitDashes;
+    if (droppedText.includes(' ')) break splitDashes;
+
+    const parts = droppedText.split('-');
+    if (parts.length === 2) break splitDashes;
+
+    droppedText = parts.join(' ');
+  }
+
+  info.searchInput.value = droppedText;
+  activateSidebarSearch(info.searchInput.value);
+}