Update how dictionaries are displayed on the settings page

6 files changed, 520 insertions, 305 deletions

diff --git a/ext/bg/js/settings-dictionaries.js b/ext/bg/js/settings-dictionaries.js
new file mode 100644
index 00000000..635b95c6
--- /dev/null
+++ b/ext/bg/js/settings-dictionaries.js
@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2019  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+let dictionaryUI = null;
+
+
+class SettingsDictionaryListUI {
+    constructor(container, template, extraContainer, extraTemplate, optionsDictionaries) {
+        this.container = container;
+        this.template = template;
+        this.extraContainer = extraContainer;
+        this.extraTemplate = extraTemplate;
+        this.optionsDictionaries = optionsDictionaries;
+
+        this.dictionaryEntries = [];
+        this.extra = null;
+    }
+
+    setDictionaries(dictionaries) {
+        for (const dictionaryEntry of this.dictionaryEntries) {
+            dictionaryEntry.cleanup();
+        }
+
+        this.dictionaryEntries = [];
+
+        let changed = false;
+        for (const dictionaryInfo of toIterable(dictionaries)) {
+            if (this.createEntry(dictionaryInfo)) {
+                changed = true;
+            }
+        }
+
+        const titles = this.dictionaryEntries.map(e => e.dictionaryInfo.title);
+        const removeKeys = Object.keys(this.optionsDictionaries).filter(key => titles.indexOf(key) < 0);
+        if (removeKeys.length >= 0) {
+            for (const key of removeKeys) {
+                delete this.optionsDictionaries[key];
+            }
+            changed = true;
+        }
+
+        if (changed) {
+            this.save();
+        }
+    }
+
+    createEntry(dictionaryInfo) {
+        const title = dictionaryInfo.title;
+        let changed = false;
+        let optionsDictionary;
+        const optionsDictionaries = this.optionsDictionaries;
+        if (optionsDictionaries.hasOwnProperty(title)) {
+            optionsDictionary = optionsDictionaries[title];
+        } else {
+            optionsDictionary = SettingsDictionaryListUI.createDictionaryOptions();
+            optionsDictionaries[title] = optionsDictionary;
+            changed = true;
+        }
+
+        const content = document.importNode(this.template.content, true).firstChild;
+        this.container.appendChild(content);
+
+        this.dictionaryEntries.push(new SettingsDictionaryEntryUI(this, dictionaryInfo, content, optionsDictionary));
+
+        return changed;
+    }
+
+    static createDictionaryOptions() {
+        return utilBackgroundIsolate({
+            priority: 0,
+            enabled: false,
+            allowSecondarySearches: false
+        });
+    }
+
+    createExtra(totalCounts, remainders, totalRemainder) {
+        const content = document.importNode(this.extraTemplate.content, true).firstChild;
+        this.extraContainer.appendChild(content);
+        return new SettingsDictionaryExtraUI(this, totalCounts, remainders, totalRemainder, content);
+    }
+
+    setCounts(dictionaryCounts, totalCounts) {
+        const remainders = Object.assign({}, totalCounts);
+        const keys = Object.keys(remainders);
+
+        for (let i = 0, ii = Math.min(this.dictionaryEntries.length, dictionaryCounts.length); i < ii; ++i) {
+            const counts = dictionaryCounts[i];
+            this.dictionaryEntries[i].setCounts(counts);
+
+            for (const key of keys) {
+                remainders[key] -= counts[key];
+            }
+        }
+
+        let totalRemainder = 0;
+        for (const key of keys) {
+            totalRemainder += remainders[key];
+        }
+
+        if (this.extra !== null) {
+            this.extra.cleanup();
+            this.extra = null;
+        }
+
+        if (totalRemainder > 0) {
+            this.extra = this.createExtra(totalCounts, remainders, totalRemainder);
+        }
+    }
+
+    save() {
+        // Overwrite
+    }
+}
+
+class SettingsDictionaryEntryUI {
+    constructor(parent, dictionaryInfo, content, optionsDictionary) {
+        this.parent = parent;
+        this.dictionaryInfo = dictionaryInfo;
+        this.optionsDictionary = optionsDictionary;
+        this.counts = null;
+        this.eventListeners = [];
+
+        this.content = content;
+        this.enabledCheckbox = this.content.querySelector('.dict-enabled');
+        this.allowSecondarySearchesCheckbox = this.content.querySelector('.dict-allow-secondary-searches');
+        this.priorityInput = this.content.querySelector('.dict-priority');
+
+        this.content.querySelector('.dict-title').textContent = this.dictionaryInfo.title;
+        this.content.querySelector('.dict-revision').textContent = `rev.${this.dictionaryInfo.revision}`;
+
+        this.applyValues();
+
+        this.addEventListener(this.enabledCheckbox, 'change', (e) => this.onEnabledChanged(e), false);
+        this.addEventListener(this.allowSecondarySearchesCheckbox, 'change', (e) => this.onAllowSecondarySearchesChanged(e), false);
+        this.addEventListener(this.priorityInput, 'change', (e) => this.onPriorityChanged(e), false);
+    }
+
+    cleanup() {
+        if (this.content !== null) {
+            if (this.content.parentNode !== null) {
+                this.content.parentNode.removeChild(this.content);
+            }
+            this.content = null;
+        }
+        this.dictionaryInfo = null;
+        this.clearEventListeners();
+    }
+
+    setCounts(counts) {
+        this.counts = counts;
+        const node = this.content.querySelector('.dict-counts');
+        node.textContent = JSON.stringify({
+            info: this.dictionaryInfo,
+            counts
+        }, null, 4);
+        node.removeAttribute('hidden');
+    }
+
+    save() {
+        this.parent.save();
+    }
+
+    addEventListener(node, type, listener, options) {
+        node.addEventListener(type, listener, options);
+        this.eventListeners.push([node, type, listener, options]);
+    }
+
+    clearEventListeners() {
+        for (const [node, type, listener, options] of this.eventListeners) {
+            node.removeEventListener(type, listener, options);
+        }
+        this.eventListeners = [];
+    }
+
+    applyValues() {
+        this.enabledCheckbox.checked = this.optionsDictionary.enabled;
+        this.allowSecondarySearchesCheckbox.checked = this.optionsDictionary.allowSecondarySearches;
+        this.priorityInput.value = `${this.optionsDictionary.priority}`;
+    }
+
+    onEnabledChanged(e) {
+        this.optionsDictionary.enabled = !!e.target.checked;
+        this.save();
+    }
+
+    onAllowSecondarySearchesChanged(e) {
+        this.optionsDictionary.allowSecondarySearches = !!e.target.checked;
+        this.save();
+    }
+
+    onPriorityChanged(e) {
+        let value = Number.parseFloat(e.target.value);
+        if (Number.isNaN(value)) {
+            value = this.optionsDictionary.priority;
+        } else {
+            this.optionsDictionary.priority = value;
+            this.save();
+        }
+
+        e.target.value = `${value}`;
+    }
+}
+
+class SettingsDictionaryExtraUI {
+    constructor(parent, totalCounts, remainders, totalRemainder, content) {
+        this.parent = parent;
+        this.content = content;
+
+        this.content.querySelector('.dict-total-count').textContent = `${totalRemainder} item${totalRemainder !== 1 ? 's' : ''}`;
+
+        const node = this.content.querySelector('.dict-counts');
+        node.textContent = JSON.stringify({
+            counts: totalCounts,
+            remainders: remainders
+        }, null, 4);
+        node.removeAttribute('hidden');
+    }
+
+    cleanup() {
+        if (this.content !== null) {
+            if (this.content.parentNode !== null) {
+                this.content.parentNode.removeChild(this.content);
+            }
+            this.content = null;
+        }
+    }
+}
+
+
+async function dictSettingsInitialize() {
+    const optionsContext = getOptionsContext();
+    const options = await apiOptionsGet(optionsContext);
+
+    dictionaryUI = new SettingsDictionaryListUI(
+        document.querySelector('#dict-groups'),
+        document.querySelector('#dict-template'),
+        document.querySelector('#dict-groups-extra'),
+        document.querySelector('#dict-extra-template'),
+        options.dictionaries
+    );
+    dictionaryUI.save = () => apiOptionsSave();
+
+    document.querySelector('#dict-purge-link').addEventListener('click', (e) => onDictionaryPurge(e), false);
+    document.querySelector('#dict-file-button').addEventListener('click', (e) => onDictionaryImportButtonClick(e), false);
+    document.querySelector('#dict-file').addEventListener('change', (e) => onDictionaryImport(e), false);
+    document.querySelector('#dict-main').addEventListener('change', (e) => onDictionaryMainChanged(e), false);
+
+    onDatabaseUpdated(options);
+}
+
+async function onDatabaseUpdated(options) {
+    try {
+        const dictionaries = await utilDatabaseGetDictionaryInfo();
+        dictionaryUI.setDictionaries(dictionaries);
+
+        updateMainDictionarySelect(options, dictionaries);
+
+        const {counts, total} = await utilDatabaseGetDictionaryCounts(dictionaries.map(v => v.title), true);
+        dictionaryUI.setCounts(counts, total);
+    } catch (e) {
+        dictionaryErrorsShow([e]);
+    }
+}
+
+async function updateMainDictionarySelect(options, dictionaries) {
+    const select = document.querySelector('#dict-main');
+    select.textContent = ''; // Empty
+
+    let option = document.createElement('option');
+    option.className = 'text-muted';
+    option.value = '';
+    option.textContent = 'Not selected';
+    select.appendChild(option);
+
+    let value = '';
+    const currentValue = options.general.mainDictionary;
+    for (const {title, sequenced} of toIterable(dictionaries)) {
+        if (!sequenced) { continue; }
+
+        option = document.createElement('option');
+        option.value = title;
+        option.textContent = title;
+        select.appendChild(option);
+
+        if (title === currentValue) {
+            value = title;
+        }
+    }
+
+    select.value = value;
+
+    if (options.general.mainDictionary !== value) {
+        options.general.mainDictionary = value;
+        apiOptionsSave();
+    }
+}
+
+async function onDictionaryMainChanged(e) {
+    const value = e.target.value;
+    const optionsContext = getOptionsContext();
+    const options = await apiOptionsGet(optionsContext);
+    options.general.mainDictionary = value;
+    apiOptionsSave();
+}
+
+
+function dictionaryErrorToString(error) {
+    if (error.toString) {
+        error = error.toString();
+    } else {
+        error = `${error}`;
+    }
+
+    for (const [match, subst] of dictionaryErrorToString.overrides) {
+        if (error.includes(match)) {
+            error = subst;
+            break;
+        }
+    }
+
+    return error;
+}
+dictionaryErrorToString.overrides = [
+    [
+        'A mutation operation was attempted on a database that did not allow mutations.',
+        'Access to IndexedDB appears to be restricted. Firefox seems to require that the history preference is set to "Remember history" before IndexedDB use of any kind is allowed.'
+    ],
+    [
+        'The operation failed for reasons unrelated to the database itself and not covered by any other error code.',
+        'Unable to access IndexedDB due to a possibly corrupt user profile. Try using the "Refresh Firefox" feature to reset your user profile.'
+    ],
+    [
+        'BulkError',
+        'Unable to finish importing dictionary data into IndexedDB. This may indicate that you do not have sufficient disk space available to complete this operation.'
+    ]
+];
+
+function dictionaryErrorsShow(errors) {
+    const dialog = $('#dict-error');
+    dialog.show().text('');
+
+    if (errors !== null && errors.length > 0) {
+        const uniqueErrors = {};
+        for (let e of errors) {
+            console.error(e);
+            e = dictionaryErrorToString(e);
+            uniqueErrors[e] = uniqueErrors.hasOwnProperty(e) ? uniqueErrors[e] + 1 : 1;
+        }
+
+        for (const e in uniqueErrors) {
+            const count = uniqueErrors[e];
+            const div = document.createElement('p');
+            if (count > 1) {
+                div.textContent = `${e} `;
+                const em = document.createElement('em');
+                em.textContent = `(${count})`;
+                div.appendChild(em);
+            } else {
+                div.textContent = `${e}`;
+            }
+            dialog.append($(div));
+        }
+
+        dialog.show();
+    } else {
+        dialog.hide();
+    }
+}
+
+
+function dictionarySpinnerShow(show) {
+    const spinner = $('#dict-spinner');
+    if (show) {
+        spinner.show();
+    } else {
+        spinner.hide();
+    }
+}
+
+function onDictionaryImportButtonClick() {
+    const dictFile = document.querySelector('#dict-file');
+    dictFile.click();
+}
+
+async function onDictionaryPurge(e) {
+    e.preventDefault();
+
+    const dictControls = $('#dict-importer, #dict-groups, #dict-groups-extra, #dict-main-group').hide();
+    const dictProgress = $('#dict-purge').show();
+
+    try {
+        dictionaryErrorsShow(null);
+        dictionarySpinnerShow(true);
+
+        await utilDatabasePurge();
+        for (const options of toIterable(await getOptionsArray())) {
+            options.dictionaries = utilBackgroundIsolate({});
+            options.general.mainDictionary = '';
+        }
+        await settingsSaveOptions();
+
+        const optionsContext = getOptionsContext();
+        const options = await apiOptionsGet(optionsContext);
+        onDatabaseUpdated(options);
+    } catch (err) {
+        dictionaryErrorsShow([err]);
+    } finally {
+        dictionarySpinnerShow(false);
+
+        dictControls.show();
+        dictProgress.hide();
+
+        if (storageEstimate.mostRecent !== null) {
+            storageUpdateStats();
+        }
+    }
+}
+
+async function onDictionaryImport(e) {
+    const dictFile = $('#dict-file');
+    const dictControls = $('#dict-importer').hide();
+    const dictProgress = $('#dict-import-progress').show();
+
+    try {
+        dictionaryErrorsShow(null);
+        dictionarySpinnerShow(true);
+
+        const setProgress = percent => dictProgress.find('.progress-bar').css('width', `${percent}%`);
+        const updateProgress = (total, current) => {
+            setProgress(current / total * 100.0);
+            if (storageEstimate.mostRecent !== null && !storageUpdateStats.isUpdating) {
+                storageUpdateStats();
+            }
+        };
+        setProgress(0.0);
+
+        const exceptions = [];
+        const summary = await utilDatabaseImport(e.target.files[0], updateProgress, exceptions);
+        for (const options of toIterable(await getOptionsArray())) {
+            const dictionaryOptions = SettingsDictionaryListUI.createDictionaryOptions();
+            dictionaryOptions.enabled = true;
+            options.dictionaries[summary.title] = dictionaryOptions;
+            if (summary.sequenced && options.general.mainDictionary === '') {
+                options.general.mainDictionary = summary.title;
+            }
+        }
+        await settingsSaveOptions();
+
+        if (exceptions.length > 0) {
+            exceptions.push(`Dictionary may not have been imported properly: ${exceptions.length} error${exceptions.length === 1 ? '' : 's'} reported.`);
+            dictionaryErrorsShow(exceptions);
+        }
+
+        const optionsContext = getOptionsContext();
+        const options = await apiOptionsGet(optionsContext);
+        onDatabaseUpdated(options);
+    } catch (err) {
+        dictionaryErrorsShow([err]);
+    } finally {
+        dictionarySpinnerShow(false);
+
+        dictFile.val('');
+        dictControls.show();
+        dictProgress.hide();
+    }
+}
diff --git a/ext/bg/js/settings.js b/ext/bg/js/settings.js
index f2250911..e4446851 100644
--- a/ext/bg/js/settings.js
+++ b/ext/bg/js/settings.js
@@ -81,16 +81,6 @@ async function formRead(options) {
         options.anki.kanji.model = $('#anki-kanji-model').val();
         options.anki.kanji.fields = utilBackgroundIsolate(ankiFieldsToDict($('#kanji .anki-field-value')));
     }
-
-    options.general.mainDictionary = $('#dict-main').val();
-    $('.dict-group').each((index, element) => {
-        const dictionary = $(element);
-        options.dictionaries[dictionary.data('title')] = utilBackgroundIsolate({
-            priority: parseInt(dictionary.find('.dict-priority').val(), 10),
-            enabled: dictionary.find('.dict-enabled').prop('checked'),
-            allowSecondarySearches: dictionary.find('.dict-allow-secondary-searches').prop('checked')
-        });
-    });
 }
 
 async function formWrite(options) {
@@ -145,13 +135,6 @@ async function formWrite(options) {
     $('#field-templates').val(options.anki.fieldTemplates);
 
     try {
-        await dictionaryGroupsPopulate(options);
-        await formMainDictionaryOptionsPopulate(options);
-    } catch (e) {
-        dictionaryErrorsShow([e]);
-    }
-
-    try {
         await ankiDeckAndModelPopulate(options);
     } catch (e) {
         ankiErrorShow(e);
@@ -161,10 +144,6 @@ async function formWrite(options) {
 }
 
 function formSetupEventListeners() {
-    $('#dict-purge-link').click(utilAsync(onDictionaryPurge));
-    $('#dict-file').change(utilAsync(onDictionaryImport));
-    $('#dict-file-button').click(onDictionaryImportButtonClick);
-
     $('#field-templates-reset').click(utilAsync(onAnkiFieldTemplatesReset));
     $('input, select, textarea').not('.anki-model').not('.ignore-form-changes *').change(utilAsync(onFormOptionsChanged));
     $('.anki-model').change(utilAsync(onAnkiModelChanged));
@@ -184,23 +163,6 @@ function formUpdateVisibility(options) {
     }
 }
 
-async function formMainDictionaryOptionsPopulate(options) {
-    const select = $('#dict-main').empty();
-    select.append($('<option class="text-muted" value="">Not selected</option>'));
-
-    let mainDictionary = '';
-    for (const dictRow of toIterable(await utilDatabaseSummarize())) {
-        if (dictRow.sequenced) {
-            select.append($(`<option value="${dictRow.title}">${dictRow.title}</option>`));
-            if (dictRow.title === options.general.mainDictionary) {
-                mainDictionary = dictRow.title;
-            }
-        }
-    }
-
-    select.val(mainDictionary);
-}
-
 async function onFormOptionsChanged(e) {
     if (!e.originalEvent && !e.isTrigger) {
         return;
@@ -239,6 +201,7 @@ async function onReady() {
     appearanceInitialize();
     await audioSettingsInitialize();
     await profileOptionsSetup();
+    await dictSettingsInitialize();
 
     storageInfoInitialize();
 
@@ -423,228 +386,6 @@ function onMessage({action, params}, sender, callback) {
 
 
 /*
- * Dictionary
- */
-
-function dictionaryErrorToString(error) {
-    if (error.toString) {
-        error = error.toString();
-    } else {
-        error = `${error}`;
-    }
-
-    for (const [match, subst] of dictionaryErrorToString.overrides) {
-        if (error.includes(match)) {
-            error = subst;
-            break;
-        }
-    }
-
-    return error;
-}
-dictionaryErrorToString.overrides = [
-    [
-        'A mutation operation was attempted on a database that did not allow mutations.',
-        'Access to IndexedDB appears to be restricted. Firefox seems to require that the history preference is set to "Remember history" before IndexedDB use of any kind is allowed.'
-    ],
-    [
-        'The operation failed for reasons unrelated to the database itself and not covered by any other error code.',
-        'Unable to access IndexedDB due to a possibly corrupt user profile. Try using the "Refresh Firefox" feature to reset your user profile.'
-    ],
-    [
-        'BulkError',
-        'Unable to finish importing dictionary data into IndexedDB. This may indicate that you do not have sufficient disk space available to complete this operation.'
-    ]
-];
-
-function dictionaryErrorsShow(errors) {
-    const dialog = $('#dict-error');
-    dialog.show().text('');
-
-    if (errors !== null && errors.length > 0) {
-        const uniqueErrors = {};
-        for (let e of errors) {
-            e = dictionaryErrorToString(e);
-            uniqueErrors[e] = uniqueErrors.hasOwnProperty(e) ? uniqueErrors[e] + 1 : 1;
-        }
-
-        for (const e in uniqueErrors) {
-            const count = uniqueErrors[e];
-            const div = document.createElement('p');
-            if (count > 1) {
-                div.textContent = `${e} `;
-                const em = document.createElement('em');
-                em.textContent = `(${count})`;
-                div.appendChild(em);
-            } else {
-                div.textContent = `${e}`;
-            }
-            dialog.append($(div));
-        }
-
-        dialog.show();
-    } else {
-        dialog.hide();
-    }
-}
-
-function dictionarySpinnerShow(show) {
-    const spinner = $('#dict-spinner');
-    if (show) {
-        spinner.show();
-    } else {
-        spinner.hide();
-    }
-}
-
-function dictionaryGroupsSort() {
-    const dictGroups = $('#dict-groups');
-    const dictGroupChildren = dictGroups.children('.dict-group').sort((ca, cb) => {
-        const pa = parseInt($(ca).find('.dict-priority').val(), 10);
-        const pb = parseInt($(cb).find('.dict-priority').val(), 10);
-        if (pa < pb) {
-            return 1;
-        } else if (pa > pb) {
-            return -1;
-        } else {
-            return 0;
-        }
-    });
-
-    dictGroups.append(dictGroupChildren);
-}
-
-async function dictionaryGroupsPopulate(options) {
-    const dictGroups = $('#dict-groups').empty();
-    const dictWarning = $('#dict-warning').hide();
-
-    const dictRows = toIterable(await utilDatabaseSummarize());
-    if (dictRows.length === 0) {
-        dictWarning.show();
-    }
-
-    for (const dictRow of toIterable(dictRowsSort(dictRows, options))) {
-        const dictOptions = options.dictionaries[dictRow.title] || {
-            enabled: false,
-            priority: 0,
-            allowSecondarySearches: false
-        };
-
-        const dictHtml = await apiTemplateRender('dictionary.html', {
-            enabled: dictOptions.enabled,
-            priority: dictOptions.priority,
-            allowSecondarySearches: dictOptions.allowSecondarySearches,
-            title: dictRow.title,
-            version: dictRow.version,
-            revision: dictRow.revision,
-            outdated: dictRow.version < 3
-        });
-
-        dictGroups.append($(dictHtml));
-    }
-
-    formUpdateVisibility(options);
-
-    $('.dict-enabled, .dict-priority, .dict-allow-secondary-searches').change(e => {
-        dictionaryGroupsSort();
-        onFormOptionsChanged(e);
-    });
-}
-
-async function onDictionaryPurge(e) {
-    e.preventDefault();
-
-    const dictControls = $('#dict-importer, #dict-groups, #dict-main-group').hide();
-    const dictProgress = $('#dict-purge').show();
-
-    try {
-        dictionaryErrorsShow(null);
-        dictionarySpinnerShow(true);
-
-        await utilDatabasePurge();
-        for (const options of toIterable(await getOptionsArray())) {
-            options.dictionaries = utilBackgroundIsolate({});
-            options.general.mainDictionary = '';
-        }
-        await settingsSaveOptions();
-
-        const optionsContext = getOptionsContext();
-        const options = await apiOptionsGet(optionsContext);
-        await dictionaryGroupsPopulate(options);
-        await formMainDictionaryOptionsPopulate(options);
-    } catch (e) {
-        dictionaryErrorsShow([e]);
-    } finally {
-        dictionarySpinnerShow(false);
-
-        dictControls.show();
-        dictProgress.hide();
-
-        if (storageEstimate.mostRecent !== null) {
-            storageUpdateStats();
-        }
-    }
-}
-
-function onDictionaryImportButtonClick() {
-    const dictFile = document.querySelector('#dict-file');
-    dictFile.click();
-}
-
-async function onDictionaryImport(e) {
-    const dictFile = $('#dict-file');
-    const dictControls = $('#dict-importer').hide();
-    const dictProgress = $('#dict-import-progress').show();
-
-    try {
-        dictionaryErrorsShow(null);
-        dictionarySpinnerShow(true);
-
-        const setProgress = percent => dictProgress.find('.progress-bar').css('width', `${percent}%`);
-        const updateProgress = (total, current) => {
-            setProgress(current / total * 100.0);
-            if (storageEstimate.mostRecent !== null && !storageUpdateStats.isUpdating) {
-                storageUpdateStats();
-            }
-        };
-        setProgress(0.0);
-
-        const exceptions = [];
-        const summary = await utilDatabaseImport(e.target.files[0], updateProgress, exceptions);
-        for (const options of toIterable(await getOptionsArray())) {
-            options.dictionaries[summary.title] = utilBackgroundIsolate({
-                enabled: true,
-                priority: 0,
-                allowSecondarySearches: false
-            });
-            if (summary.sequenced && options.general.mainDictionary === '') {
-                options.general.mainDictionary = summary.title;
-            }
-        }
-        await settingsSaveOptions();
-
-        if (exceptions.length > 0) {
-            exceptions.push(`Dictionary may not have been imported properly: ${exceptions.length} error${exceptions.length === 1 ? '' : 's'} reported.`);
-            dictionaryErrorsShow(exceptions);
-        }
-
-        const optionsContext = getOptionsContext();
-        const options = await apiOptionsGet(optionsContext);
-        await dictionaryGroupsPopulate(options);
-        await formMainDictionaryOptionsPopulate(options);
-    } catch (e) {
-        dictionaryErrorsShow([e]);
-    } finally {
-        dictionarySpinnerShow(false);
-
-        dictFile.val('');
-        dictControls.show();
-        dictProgress.hide();
-    }
-}
-
-
-/*
  * Anki
  */
 
diff --git a/ext/bg/js/templates.js b/ext/bg/js/templates.js
index 59516d97..26d1575f 100644
--- a/ext/bg/js/templates.js
+++ b/ext/bg/js/templates.js
@@ -1,32 +1,5 @@
 (function() {
   var template = Handlebars.template, templates = Handlebars.templates = Handlebars.templates || {};
-templates['dictionary.html'] = template({"1":function(container,depth0,helpers,partials,data) {
-    return "    <p class=\"text-warning\">This dictionary is outdated and may not support new extension features; please import the latest version.</p>\n";
-},"3":function(container,depth0,helpers,partials,data) {
-    return "checked";
-},"compiler":[7,">= 4.0.0"],"main":function(container,depth0,helpers,partials,data) {
-    var stack1, helper, alias1=depth0 != null ? depth0 : (container.nullContext || {}), alias2=helpers.helperMissing, alias3="function", alias4=container.escapeExpression;
-
-  return "<div class=\"dict-group well well-sm\" data-title=\""
-    + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
-    + "\">\n    <h4><span class=\"text-muted glyphicon glyphicon-book\"></span> "
-    + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
-    + " <small>rev."
-    + alias4(((helper = (helper = helpers.revision || (depth0 != null ? depth0.revision : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"revision","hash":{},"data":data}) : helper)))
-    + "</small></h4>\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.outdated : depth0),{"name":"if","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "\n    <div class=\"checkbox\">\n        <label><input type=\"checkbox\" class=\"dict-enabled\" "
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.enabled : depth0),{"name":"if","hash":{},"fn":container.program(3, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "> Enable search</label>\n    </div>\n    <div class=\"checkbox options-advanced\">\n        <label><input type=\"checkbox\" class=\"dict-allow-secondary-searches\" "
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.allowSecondarySearches : depth0),{"name":"if","hash":{},"fn":container.program(3, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "> Allow secondary searches</label>\n    </div>\n    <div class=\"form-group options-advanced\">\n        <label for=\"dict-"
-    + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
-    + "\">Result priority</label>\n        <input type=\"number\" value=\""
-    + alias4(((helper = (helper = helpers.priority || (depth0 != null ? depth0.priority : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"priority","hash":{},"data":data}) : helper)))
-    + "\" id=\"dict-"
-    + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
-    + "\" class=\"form-control dict-priority\">\n    </div>\n</div>\n";
-},"useData":true});
 templates['kanji.html'] = template({"1":function(container,depth0,helpers,partials,data) {
     var stack1;
 
diff --git a/ext/bg/js/util.js b/ext/bg/js/util.js
index 1ca0833b..3554ec3d 100644
--- a/ext/bg/js/util.js
+++ b/ext/bg/js/util.js
@@ -84,6 +84,14 @@ function utilDatabaseSummarize() {
     return utilBackend().translator.database.summarize();
 }
 
+function utilDatabaseGetDictionaryInfo() {
+    return utilBackend().translator.database.getDictionaryInfo();
+}
+
+function utilDatabaseGetDictionaryCounts(dictionaryNames, getTotal) {
+    return utilBackend().translator.database.getDictionaryCounts(dictionaryNames, getTotal);
+}
+
 function utilAnkiGetModelFieldNames(modelName) {
     return utilBackend().anki.getModelFieldNames(modelName);
 }
diff --git a/ext/bg/settings.html b/ext/bg/settings.html
index b281501d..7ac196f2 100644
--- a/ext/bg/settings.html
+++ b/ext/bg/settings.html
@@ -410,7 +410,7 @@
                 </div>
             </div>
 
-            <div>
+            <div class="ignore-form-changes">
                 <div>
                     <img src="/mixed/img/spinner.gif" class="pull-right" id="dict-spinner" alt>
                     <h3>Dictionaries</h3>
@@ -434,6 +434,7 @@
                 <div class="alert alert-danger" id="dict-error"></div>
 
                 <div id="dict-groups"></div>
+                <div id="dict-groups-extra"></div>
 
                 <div id="dict-import-progress">
                     Dictionary data is being imported, please be patient...
@@ -451,6 +452,32 @@
                     <button class="btn btn-primary" id="dict-file-button">Import Dictionary</button>
                     <div hidden><input type="file" id="dict-file"></div>
                 </div>
+
+                <template id="dict-template"><div class="dict-group well well-sm">
+                    <h4><span class="text-muted glyphicon glyphicon-book"></span> <span class="dict-title"></span> <small class="dict-revision"></small></h4>
+                    <p class="text-warning" hidden>This dictionary is outdated and may not support new extension features; please import the latest version.</p>
+
+                    <div class="checkbox">
+                        <label><input type="checkbox" class="dict-enabled"> Enable search</label>
+                    </div>
+                    <div class="checkbox options-advanced">
+                        <label><input type="checkbox" class="dict-allow-secondary-searches"> Allow secondary searches</label>
+                    </div>
+                    <div class="form-group options-advanced">
+                        <label class="dict-result-priority-label">Result priority</label>
+                        <input type="number" class="form-control dict-priority">
+                    </div>
+                    <pre class="debug dict-counts" hidden></pre>
+                </div></template>
+
+                <template id="dict-extra-template"><div class="well well-sm">
+                    <h4><span class="text-muted glyphicon glyphicon-alert"></span> <span class="dict-title">Unassociated Data</span> <small class="dict-total-count"></small></h4>
+                    <p class="text-warning">
+                        The database contains extra data which is not associated with any installed dictionary.
+                        Purging the database can fix this issue.
+                    </p>
+                    <pre class="debug dict-counts" hidden></pre>
+                </div></template>
             </div>
 
             <div id="storage-info">
@@ -700,6 +727,7 @@
         <script src="/bg/js/util.js"></script>
         <script src="/mixed/js/audio.js"></script>
 
+        <script src="/bg/js/settings-dictionaries.js"></script>
         <script src="/bg/js/settings-profiles.js"></script>
         <script src="/bg/js/settings.js"></script>
     </body>
diff --git a/tmpl/dictionary.html b/tmpl/dictionary.html
deleted file mode 100644
index 61bb79ac..00000000
--- a/tmpl/dictionary.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<div class="dict-group well well-sm" data-title="{{title}}">
-    <h4><span class="text-muted glyphicon glyphicon-book"></span> {{title}} <small>rev.{{revision}}</small></h4>
-    {{#if outdated}}
-    <p class="text-warning">This dictionary is outdated and may not support new extension features; please import the latest version.</p>
-    {{/if}}
-
-    <div class="checkbox">
-        <label><input type="checkbox" class="dict-enabled" {{#if enabled}}checked{{/if}}> Enable search</label>
-    </div>
-    <div class="checkbox options-advanced">
-        <label><input type="checkbox" class="dict-allow-secondary-searches" {{#if allowSecondarySearches}}checked{{/if}}> Allow secondary searches</label>
-    </div>
-    <div class="form-group options-advanced">
-        <label for="dict-{{title}}">Result priority</label>
-        <input type="number" value="{{priority}}" id="dict-{{title}}" class="form-control dict-priority">
-    </div>
-</div>