(core) Simple localization support and currency selector.

Summary:
- Grist document has a associated "locale" setting that affects how currency is formatted.
- Currency selector for number format.

Test Plan: not done

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: paulfitz

Differential Revision: https://phab.getgrist.com/D2977

app/client/components/CopySelection.js

@@ -19,7 +19,10 @@ function CopySelection(tableData, rowIds, fields, options) {
   this.colStyle = options.colStyle;
   this.columns = fields.map((f, i) => {
     let formatter = ValueFormatter.createFormatter(
-      f.displayColModel().type(), f.widgetOptionsJson());
+      f.displayColModel().type(),
+      f.widgetOptionsJson(),
+      f.documentSettings()
+    );
     let _fmtGetter = tableData.getRowPropFunc(this.displayColIds[i]);
     let _rawGetter = tableData.getRowPropFunc(this.colIds[i]);
 

app/client/components/GristDoc.ts

@@ -158,7 +158,7 @@ export class GristDoc extends DisposableWithEvents {
       app.topAppModel.getUntrustedContentOrigin(), this.docComm, app.clientScope);
 
     // Maintain the MetaRowModel for the global document info, including docId and peers.
-    this.docInfo = this.docModel.docInfo.getRowModel(1);
+    this.docInfo = this.docModel.docInfoRow;
 
     const defaultViewId = this.docInfo.newDefaultViewId;
 

app/client/components/SearchBar.ts

@@ -267,7 +267,7 @@ class Searcher {
 
     this._fieldStepper.array = section.viewFields().peek();
     this._fieldFormatters = this._fieldStepper.array.map(
-      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson()));
+      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson(), f.documentSettings()));
     return tableModel;
   }
 

app/client/components/TypeConversion.ts

@@ -35,7 +35,7 @@ export function addColTypeSuffix(type: string, column: ColumnRec, docModel: DocM
       return `${type}:${refTableId}`;
     }
     case "DateTime":
-      return 'DateTime:' + docModel.docInfo.getRowModel(1).timezone();
+      return 'DateTime:' + docModel.docInfoRow.timezone();
     default:
       return type;
   }

app/client/models/DocModel.ts

@@ -111,6 +111,8 @@ export class DocModel {
   public pages: MTM<PageRec> = this._metaTableModel("_grist_Pages", createPageRec);
   public rules: MTM<ACLRuleRec> = this._metaTableModel("_grist_ACLRules", createACLRuleRec);
 
+  public docInfoRow: DocInfoRec;
+
   public allTables: KoArray<TableRec>;
   public allTableIds: KoArray<string>;
 
@@ -135,6 +137,8 @@ export class DocModel {
       model.loadData();
     }
 
+    this.docInfoRow = this.docInfo.getRowModel(1);
+
     // An observable array of user-visible tables, sorted by tableId, excluding summary tables.
     // This is a publicly exposed member.
     this.allTables = createUserTablesArray(this.tables);

app/client/models/SearchModel.ts

@@ -217,7 +217,7 @@ class FinderImpl implements IFinder {
 
     this._fieldStepper.array = section.viewFields().peek();
     this._fieldFormatters = this._fieldStepper.array.map(
-      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson()));
+      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson(), f.documentSettings()));
     return tableModel;
   }
 

app/client/models/entities/DocInfoRec.ts

@@ -1,13 +1,18 @@
 import {DocModel, IRowModel} from 'app/client/models/DocModel';
+import * as modelUtil from 'app/client/models/modelUtil';
+import {jsonObservable} from 'app/client/models/modelUtil';
+import {DocumentSettings} from 'app/common/DocumentSettings';
 import * as ko from 'knockout';
 
 // The document-wide metadata. It's all contained in a single record with id=1.
 export interface DocInfoRec extends IRowModel<"_grist_DocInfo"> {
+  documentSettingsJson: modelUtil.SaveableObjObservable<DocumentSettings>
   defaultViewId: ko.Computed<number>;
   newDefaultViewId: ko.Computed<number>;
 }
 
 export function createDocInfoRec(this: DocInfoRec, docModel: DocModel): void {
+  this.documentSettingsJson = jsonObservable(this.documentSettings);
   this.defaultViewId = this.autoDispose(ko.pureComputed(() => {
     const tab = docModel.allTabs.at(0);
     return tab ? tab.viewRef() : 0;

app/client/models/entities/ViewFieldRec.ts

@@ -1,6 +1,7 @@
 import {ColumnRec, DocModel, IRowModel, refRecord, ViewSectionRec} from 'app/client/models/DocModel';
 import * as modelUtil from 'app/client/models/modelUtil';
 import * as UserType from 'app/client/widgets/UserType';
+import {DocumentSettings} from 'app/common/DocumentSettings';
 import {BaseFormatter, createFormatter} from 'app/common/ValueFormatter';
 import {Computed, fromKo} from 'grainjs';
 import * as ko from 'knockout';
@@ -55,7 +56,6 @@ export interface ViewFieldRec extends IRowModel<"_grist_Views_section_field"> {
 
   // Observable for the object with the current options, either for the field or for the column,
   // which takes into account the default options for column's type.
-
   widgetOptionsJson: modelUtil.SaveableObjObservable<any>;
 
   // Whether lines should wrap in a cell.
@@ -73,6 +73,8 @@ export interface ViewFieldRec extends IRowModel<"_grist_Views_section_field"> {
   textColor: modelUtil.KoSaveableObservable<string|undefined>;
   fillColor: modelUtil.KoSaveableObservable<string>;
 
+  documentSettings: ko.PureComputed<DocumentSettings>;
+
   // Helper which adds/removes/updates field's displayCol to match the formula.
   saveDisplayFormula(formula: string): Promise<void>|undefined;
 
@@ -167,8 +169,8 @@ export function createViewFieldRec(this: ViewFieldRec, docModel: DocModel): void
   this.createVisibleColFormatter = function() {
     const vcol = this.visibleColModel();
     return (vcol.getRowId() !== 0) ?
-      createFormatter(vcol.type(), vcol.widgetOptionsJson()) :
+      createFormatter(vcol.type(), vcol.widgetOptionsJson(), this.documentSettings()) :
-      createFormatter(this.column().type(), this.widgetOptionsJson());
+      createFormatter(this.column().type(), this.widgetOptionsJson(), this.documentSettings());
   };
 
   // The widgetOptions to read and write: either the column's or the field's own.
@@ -179,7 +181,6 @@ export function createViewFieldRec(this: ViewFieldRec, docModel: DocModel): void
 
   // Observable for the object with the current options, either for the field or for the column,
   // which takes into account the default options for this column's type.
-
   this.widgetOptionsJson = modelUtil.jsonObservable(this._widgetOptionsStr,
     (opts: any) => UserType.mergeOptions(opts || {}, this.column().pureType()));
 
@@ -211,4 +212,6 @@ export function createViewFieldRec(this: ViewFieldRec, docModel: DocModel): void
     read: () => fillColorProp(),
     write: (setter, val) => setter(fillColorProp, val.toUpperCase() === '#FFFFFF' ? '' : val),
   });
+
+  this.documentSettings = ko.pureComputed(() => docModel.docInfoRow.documentSettingsJson());
 }

app/client/ui/DocumentSettings.ts

@@ -2,15 +2,21 @@
  * This module export a component for editing some document settings consisting of the timezone,
  * (new settings to be added here ...).
  */
-import { dom, styled } from 'grainjs';
+import {dom, IDisposableOwner, styled} from 'grainjs';
 import {Computed, Observable} from 'grainjs';
 
+
+import {ACSelectItem, buildACSelect} from "app/client/lib/ACSelect";
+import {ACIndexImpl} from "app/client/lib/ACIndex";
 import {loadMomentTimezone} from 'app/client/lib/imports';
 import {DocInfoRec} from 'app/client/models/DocModel';
 import {DocPageModel} from 'app/client/models/DocPageModel';
-import { vars } from 'app/client/ui2018/cssVars';
+import {testId, vars} from 'app/client/ui2018/cssVars';
 import {saveModal} from 'app/client/ui2018/modals';
 import {buildTZAutocomplete} from 'app/client/widgets/TZAutocomplete';
+import {locales} from "app/common/Locales";
+import {buildCurrencyPicker} from 'app/client/widgets/CurrencyPicker';
+import * as LocaleCurrency from "locale-currency";
 
 /**
  * Builds a simple saveModal for saving settings.
@@ -18,23 +24,82 @@ import { buildTZAutocomplete } from 'app/client/widgets/TZAutocomplete';
 export async function showDocSettingsModal(docInfo: DocInfoRec, docPageModel: DocPageModel): Promise<void> {
   const moment = await loadMomentTimezone();
   return saveModal((ctl, owner) => {
-    const timezone = Observable.create(owner, docInfo.timezone.peek());
+    const timezoneObs = Observable.create(owner, docInfo.timezone.peek());
+
+    const {locale, currency} = docInfo.documentSettingsJson.peek();
+    const localeObs = Observable.create(owner, locale);
+    const currencyObs = Observable.create(owner, currency);
+
     return {
       title: 'Document Settings',
       body: [
         cssDataRow("This document's ID (for API use):"),
         cssDataRow(dom('tt', docPageModel.currentDocId.get())),
         cssDataRow('Time Zone:'),
-        cssDataRow(dom.create(buildTZAutocomplete, moment, timezone, (val) => timezone.set(val))),
+        cssDataRow(dom.create(buildTZAutocomplete, moment, timezoneObs, (val) => timezoneObs.set(val))),
+        cssDataRow('Locale:'),
+        cssDataRow(dom.create(buildLocaleSelect, localeObs)),
+        cssDataRow('Currency:'),
+        cssDataRow(dom.domComputed(localeObs, (l) =>
+          dom.create(buildCurrencyPicker, currencyObs, (val) => currencyObs.set(val),
+            {defaultCurrencyLabel: `Local currency (${LocaleCurrency.getCurrency(l)})`})
+        )),
       ],
-      // At this point, we only need to worry about saving this one setting.
+      saveFunc: () => docInfo.updateColValues({
-      saveFunc: () => docInfo.timezone.saveOnly(timezone.get()),
+        timezone: timezoneObs.get(),
-      // If timezone hasn't changed, there is nothing to save, so disable the Save button.
+        documentSettings: JSON.stringify({
-      saveDisabled: Computed.create(owner, (use) => use(timezone) === docInfo.timezone.peek()),
+          ...docInfo.documentSettingsJson.peek(),
+          locale: localeObs.get(),
+          currency: currencyObs.get()
+        })
+      }),
+      // If timezone, locale, or currency hasn't changed, disable the Save button.
+      saveDisabled: Computed.create(owner,
+        (use) => {
+          const docSettings = docInfo.documentSettingsJson.peek();
+          return (
+            use(timezoneObs) === docInfo.timezone.peek() &&
+            use(localeObs) === docSettings.locale &&
+            use(currencyObs) === docSettings.currency
+          );
+        })
     };
   });
 }
 
+
+type LocaleItem = ACSelectItem & {locale?: string};
+
+function buildLocaleSelect(
+  owner: IDisposableOwner,
+  locale: Observable<string>
+) {
+  const localeList: LocaleItem[] = locales.map(l => ({
+    value: l.name, // Use name as a value, we will translate the name into the locale on save
+    label: l.name,
+    locale: l.code,
+    cleanText: l.name.trim().toLowerCase(),
+  }));
+  const acIndex = new ACIndexImpl<LocaleItem>(localeList, 200, true);
+  // AC select will show the value (in this case locale) not a label when something is selected.
+  // To show the label - create another observable that will be in sync with the value, but
+  // will contain text.
+  const localeCode = locale.get();
+  const localeName = locales.find(l => l.code === localeCode)?.name || localeCode;
+  const textObs = Observable.create(owner, localeName);
+  return buildACSelect(owner,
+    {
+      acIndex, valueObs: textObs,
+      save(value, item: LocaleItem | undefined) {
+        if (!item) { throw new Error("Invalid locale"); }
+        textObs.set(value);
+        locale.set(item.locale!);
+      },
+    },
+    testId("locale-autocomplete")
+  );
+}
+
 // This matches the style used in showProfileModal in app/client/ui/AccountWidget.
 const cssDataRow = styled('div', `
   margin: 16px 0px;

app/client/widgets/AbstractWidget.js

@@ -17,9 +17,8 @@ function AbstractWidget(field, opts = {}) {
   this.options = field.widgetOptionsJson;
   const {defaultTextColor = '#000000'} = opts;
 
-  this.valueFormatter = this.autoDispose(ko.computed(() => {
+  this.valueFormatter = this.autoDispose(ko.computed(() =>
-    return ValueFormatter.createFormatter(field.displayColModel().type(), this.options());
+    ValueFormatter.createFormatter(field.displayColModel().type(), this.options(), field.documentSettings())));
-  }));
 
   this.textColor = Computed.create(this, (use) => use(this.field.textColor) || defaultTextColor)
     .onWrite((val) => this.field.textColor(val === defaultTextColor ? undefined : val));

app/client/widgets/CurrencyPicker.ts

@@ -0,0 +1,49 @@
+import {ACSelectItem, buildACSelect} from "app/client/lib/ACSelect";
+import {Computed, IDisposableOwner, Observable} from "grainjs";
+import {ACIndexImpl} from "app/client/lib/ACIndex";
+import {testId} from 'app/client/ui2018/cssVars';
+import {currencies} from 'app/common/Locales';
+
+interface CurrencyPickerOptions {
+  // The label to use in the select menu for the default option.
+  defaultCurrencyLabel: string;
+}
+
+export function buildCurrencyPicker(
+  owner: IDisposableOwner,
+  currency: Observable<string|undefined>,
+  onSave: (value: string|undefined) => void,
+  {defaultCurrencyLabel}: CurrencyPickerOptions
+) {
+  const currencyItems: ACSelectItem[] = currencies
+    .map(item => ({
+      value: item.code,
+      label: `${item.code} ${item.name}`,
+      cleanText: `${item.code} ${item.name}`.trim().toLowerCase(),
+    }));
+
+  // Add default currency label option to the very front.
+  currencyItems.unshift({
+    label : defaultCurrencyLabel,
+    value : defaultCurrencyLabel,
+    cleanText : defaultCurrencyLabel.toLowerCase(),
+  });
+  // Create a computed that will display 'Local currency' as a value and label
+  // when `currency` is undefined.
+  const valueObs = Computed.create(owner, (use) => use(currency) || defaultCurrencyLabel);
+  const acIndex = new ACIndexImpl<ACSelectItem>(currencyItems, 200, true);
+  return buildACSelect(owner,
+    {
+      acIndex, valueObs,
+      save(_, item: ACSelectItem | undefined) {
+        // Save only if we have found a match
+        if (!item) {
+          throw new Error("Invalid currency");
+        }
+        // For default value, return undefined to use default currency for document.
+        onSave(item.value === defaultCurrencyLabel ? undefined : item.value);
+      }
+    },
+    testId("currency-autocomplete")
+  );
+}

app/client/widgets/DateEditor.js

@@ -30,7 +30,9 @@ Object.defineProperty(Datepicker.prototype, 'isInput', {
 function DateEditor(options) {
   // A string that is always `UTC` in the DateEditor, eases DateTimeEditor inheritance.
   this.timezone = options.timezone || 'UTC';
+
   this.dateFormat = options.field.widgetOptionsJson.peek().dateFormat;
+  this.locale = options.field.documentSettings.peek().locale;
 
   // Strip moment format string to remove markers unsupported by the datepicker.
   this.safeFormat = DateEditor.parseMomentToSafe(this.dateFormat);
@@ -68,6 +70,10 @@ function DateEditor(options) {
       todayHighlight: true,
       todayBtn: 'linked',
       assumeNearbyYear: TWO_DIGIT_YEAR_THRESHOLD,
+      // Datepicker supports most of the languages. They just need to be included in the bundle
+      // or by script tag, i.e.
+      // <script src="bootstrap-datepicker/dist/locales/bootstrap-datepicker.pl.min.js"></script>
+      language : this.getLanguage(),
       // Convert the stripped format string to one suitable for the datepicker.
       format: DateEditor.parseSafeToCalendar(this.safeFormat)
     });
@@ -168,5 +174,13 @@ DateEditor.parseSafeToCalendar = function(sFormat) {
   return sFormat.replace(/\bdddd\b/g, 'DD'); // dddd -> DD
 };
 
+// Gets the language based on the current locale.
+DateEditor.prototype.getLanguage = function() {
+  // this requires a polyfill, i.e. https://www.npmjs.com/package/@formatjs/intl-locale
+  // more info about ts: https://github.com/microsoft/TypeScript/issues/37326
+  // return new Intl.Locale(locale).language;
+  return this.locale.substr(0, this.locale.indexOf("-"));
+}
+
 
 module.exports = DateEditor;

app/client/widgets/NewAbstractWidget.ts

@@ -47,7 +47,7 @@ export abstract class NewAbstractWidget extends Disposable {
     // Note that its easier to create a knockout computed from the several knockout observables,
     // but then we turn it into a grainjs observable.
     const formatter = this.autoDispose(ko.computed(() =>
-      createFormatter(field.displayColModel().type(), this.options())));
+      createFormatter(field.displayColModel().type(), this.options(), field.documentSettings())));
     this.valueFormatter = fromKo(formatter);
   }
 

app/client/widgets/NumericTextBox.ts

@@ -11,6 +11,8 @@ import {NTextBox} from 'app/client/widgets/NTextBox';
 import {clamp} from 'app/common/gutil';
 import {buildNumberFormat, NumberFormatOptions, NumMode, NumSign} from 'app/common/NumberFormat';
 import {Computed, dom, DomContents, DomElementArg, fromKo, MultiHolder, Observable, styled} from 'grainjs';
+import {buildCurrencyPicker} from "app/client/widgets/CurrencyPicker";
+import * as LocaleCurrency from "locale-currency";
 
 
 const modeOptions: Array<ISelectorOption<NumMode>> = [
@@ -37,17 +39,25 @@ export class NumericTextBox extends NTextBox {
     const holder = new MultiHolder();
 
     // Resolved options, to show default min/max decimals, which change depending on numMode.
-    const resolved = Computed.create<Intl.ResolvedNumberFormatOptions>(holder, (use) =>
+    const resolved = Computed.create<Intl.ResolvedNumberFormatOptions>(holder, (use) => {
-      buildNumberFormat({numMode: use(this.options).numMode}).resolvedOptions());
+      const {numMode} = use(this.options);
+      const docSettings = use(this.field.documentSettings);
+      return buildNumberFormat({numMode}, docSettings).resolvedOptions();
+    });
 
     // Prepare various observables that reflect the options in the UI.
     const options = fromKo(this.options);
-    const numMode = Computed.create(holder, options, (use, opts) => opts.numMode || null);
+    const docSettings = fromKo(this.field.documentSettings);
+    const numMode = Computed.create(holder, options, (use, opts) => (opts.numMode as NumMode) || null);
     const numSign = Computed.create(holder, options, (use, opts) => opts.numSign || null);
+    const currency = Computed.create(holder, options, (use, opts) => opts.currency);
     const minDecimals = Computed.create(holder, options, (use, opts) => numberOrDefault(opts.decimals, ''));
     const maxDecimals = Computed.create(holder, options, (use, opts) => numberOrDefault(opts.maxDecimals, ''));
     const defaultMin = Computed.create(holder, resolved, (use, res) => res.minimumFractionDigits);
     const defaultMax = Computed.create(holder, resolved, (use, res) => res.maximumFractionDigits);
+    const docCurrency = Computed.create(holder, docSettings, (use, settings) =>
+      settings.currency ?? LocaleCurrency.getCurrency(settings.locale)
+    );
 
     // Save a value as the given property in this.options() observable. Set it, save, and revert
     // on save error. This is similar to what modelUtil.setSaveValue() does.
@@ -66,6 +76,7 @@ export class NumericTextBox extends NTextBox {
     // Mode and Sign behave as toggles: clicking a selected on deselects it.
     const setMode = (val: NumMode) => setSave('numMode', val !== numMode.get() ? val : undefined);
     const setSign = (val: NumSign) => setSave('numSign', val !== numSign.get() ? val : undefined);
+    const setCurrency = (val: string|undefined) => setSave('currency', val);
 
     return [
       super.buildConfigDom(),
@@ -75,6 +86,16 @@ export class NumericTextBox extends NTextBox {
         makeButtonSelect(numMode, modeOptions, setMode, {}, cssModeSelect.cls(''), testId('numeric-mode')),
         makeButtonSelect(numSign, signOptions, setSign, {}, cssSignSelect.cls(''), testId('numeric-sign')),
       ),
+      dom.maybe((use) => use(numMode) === 'currency', () => [
+        cssLabel('Currency'),
+        cssRow(
+          dom.domComputed(docCurrency, (defaultCurrency) =>
+            buildCurrencyPicker(holder, currency, setCurrency,
+              {defaultCurrencyLabel: `Default currency (${defaultCurrency})`})
+          ),
+          testId("numeric-currency")
+        )
+      ]),
       cssLabel('Decimals'),
       cssRow(
         decimals('min', minDecimals, defaultMin, setMinDecimals, testId('numeric-min-decimals')),
@@ -84,12 +105,13 @@ export class NumericTextBox extends NTextBox {
   }
 }
 
+
 function numberOrDefault<T>(value: unknown, def: T): number | T {
   return typeof value !== 'undefined' ? Number(value) : def;
 }
 
 // Helper used by setSave() above to reset some properties when switching modes.
-function updateOptions(prop: keyof NumberFormatOptions, value: unknown): NumberFormatOptions {
+function updateOptions(prop: keyof NumberFormatOptions, value: unknown): Partial<NumberFormatOptions> {
   // Reset the numSign to default when toggling mode to percent or scientific.
   if (prop === 'numMode' && (!value || value === 'scientific' || value === 'percent')) {
     return {numSign: undefined};

app/client/widgets/Spinner.ts

@@ -14,8 +14,11 @@ export class Spinner extends NumericTextBox {
 
   constructor(field: ViewFieldRec) {
     super(field);
-    const resolved = this.autoDispose(ko.computed(() =>
+    const resolved = this.autoDispose(ko.computed(() => {
-      buildNumberFormat({numMode: this.options().numMode}).resolvedOptions()));
+      const {numMode} = this.options();
+      const docSettings = this.field.documentSettings();
+      return buildNumberFormat({numMode}, docSettings).resolvedOptions();
+    }));
     this._stepSize = this.autoDispose(ko.computed(() => {
       const extraScaling = (this.options().numMode === 'percent') ? 2 : 0;
       return Math.pow(10, -(this.options().decimals || resolved().minimumFractionDigits) - extraScaling);

app/common/BrowserSettings.ts

@@ -4,4 +4,6 @@
 export interface BrowserSettings {
   // The browser's timezone, must be one of `momet.tz.names()`.
   timezone?: string;
+  // The browser's locale, should be read from Accept-Language header.
+  locale?: string;
 }

app/common/DocumentSettings.ts

@@ -0,0 +1,4 @@
+export interface DocumentSettings {
+  locale: string;
+  currency?: string;
+}

app/common/Locales.ts

@@ -0,0 +1,53 @@
+import LocaleCurrency = require('locale-currency/map');
+import {nativeCompare} from 'app/common/gutil';
+
+const localeCodes = [
+  "es-AR", "hy-AM", "en-AU", "az-AZ", "be-BY", "quz-BO", "pt-BR",
+  "bg-BG", "en-CA", "arn-CL", "es-CO", "hr-HR", "cs-CZ", "da-DK",
+  "es-EC", "ar-EG", "fi-FI", "fr-FR", "ka-GE", "de-DE", "el-GR", "en-HK",
+  "hu-HU", "hi-IN", "id-ID", "ga-IE", "ar-IL", "it-IT", "ja-JP", "kk-KZ",
+  "lv-LV", "lt-LT", "es-MX", "mn-MN", "my-MM", "nl-NL", "nb-NO",
+  "es-PY", "ceb-PH", "pl-PL", "pt-PT", "ro-RO", "ru-RU", "sr-RS",
+  "sk-SK", "sl-SI", "ko-KR", "es-ES", "sv-SE", "de-CH", "zh-TW", "th-TH",
+  "tr-TR", "uk-UA", "en-GB", "en-US", "es-UY", "es-VE", "vi-VN"
+];
+
+export interface Locale {
+  name: string;
+  code: string;
+}
+
+export let locales: Readonly<Locale[]>;
+
+// Intl.DisplayNames is only supported on recent browsers, so proceed with caution.
+try {
+  const localeDisplay = new Intl.DisplayNames('en', {type: 'region'});
+  locales = localeCodes.map(code => {
+    return { name: localeDisplay.of(new Intl.Locale(code).region), code };
+  });
+} catch {
+  // Fall back to using the locale code as the display name.
+  locales = localeCodes.map(code => ({ name: code, code }));
+}
+
+export interface Currency {
+  name: string;
+  code: string;
+}
+
+export let currencies: Readonly<Currency[]>;
+
+// Intl.DisplayNames is only supported on recent browsers, so proceed with caution.
+try {
+  const currencyDisplay = new Intl.DisplayNames('en', {type: 'currency'});
+  currencies = [...new Set(Object.values(LocaleCurrency))].map(code => {
+    return { name: currencyDisplay.of(code), code };
+  });
+} catch {
+  // Fall back to using the currency code as the display name.
+  currencies = [...new Set(Object.values(LocaleCurrency))].map(code => {
+    return { name: code, code };
+  });
+}
+
+currencies = [...currencies].sort((a, b) => nativeCompare(a.code, b.code));

app/common/NumberFormat.ts

@@ -19,26 +19,25 @@
  */
 
 import {clamp} from 'app/common/gutil';
+import * as LocaleCurrency from "locale-currency";
+import {FormatOptions} from 'app/common/ValueFormatter';
+import {DocumentSettings} from 'app/common/DocumentSettings';
 
 // Options for number formatting.
 export type NumMode = 'currency' | 'decimal' | 'percent' | 'scientific';
 export type NumSign = 'parens';
 
-// TODO: In the future, locale should be a value associated with the document or the user.
+export interface NumberFormatOptions extends FormatOptions {
-const defaultLocale = 'en-US';
-
-// TODO: The currency to use for currency formatting could be made configurable.
-const defaultCurrency = 'USD';
-
-export interface NumberFormatOptions {
   numMode?: NumMode;
   numSign?: NumSign;
   decimals?: number;      // aka minimum fraction digits
   maxDecimals?: number;
+  currency?: string;
 }
 
-export function buildNumberFormat(options: NumberFormatOptions): Intl.NumberFormat {
+export function buildNumberFormat(options: NumberFormatOptions, docSettings: DocumentSettings): Intl.NumberFormat {
-  const nfOptions: Intl.NumberFormatOptions = parseNumMode(options.numMode);
+  const currency = options.currency || docSettings.currency || LocaleCurrency.getCurrency(docSettings.locale);
+  const nfOptions: Intl.NumberFormatOptions = parseNumMode(options.numMode, currency);
 
   // numSign is implemented outside of Intl.NumberFormat since the latter's similar 'currencySign'
   // option is not well-supported, and doesn't apply to non-currency formats.
@@ -50,7 +49,7 @@ export function buildNumberFormat(options: NumberFormatOptions): Intl.NumberForm
 
   // maximumFractionDigits must not be less than the minimum, so we need to know the minimum
   // implied by numMode.
-  const tmp = new Intl.NumberFormat(defaultLocale, nfOptions).resolvedOptions();
+  const tmp = new Intl.NumberFormat(docSettings.locale, nfOptions).resolvedOptions();
 
   if (options.maxDecimals !== undefined) {
     // Should be at least 0 and at least minimumFractionDigits.
@@ -60,12 +59,12 @@ export function buildNumberFormat(options: NumberFormatOptions): Intl.NumberForm
     nfOptions.maximumFractionDigits = clamp(10, tmp.minimumFractionDigits || 0, 20);
   }
 
-  return new Intl.NumberFormat(defaultLocale, nfOptions);
+  return new Intl.NumberFormat(docSettings.locale, nfOptions);
 }
 
-function parseNumMode(numMode?: NumMode): Intl.NumberFormatOptions {
+function parseNumMode(numMode?: NumMode, currency?: string): Intl.NumberFormatOptions {
   switch (numMode) {
-    case 'currency': return {style: 'currency', currency: defaultCurrency};
+    case 'currency': return {style: 'currency', currency, currencyDisplay: 'narrowSymbol' };
     case 'decimal': return {useGrouping: true};
     case 'percent': return {style: 'percent'};
     // TODO 'notation' option (and therefore numMode 'scientific') works on recent Firefox and

app/common/ValueFormatter.ts

@@ -7,9 +7,14 @@ import {buildNumberFormat, NumberFormatOptions} from 'app/common/NumberFormat';
 import {decodeObject, GristDateTime} from 'app/plugin/objtypes';
 import isPlainObject = require('lodash/isPlainObject');
 import * as moment from 'moment-timezone';
+import {DocumentSettings} from 'app/common/DocumentSettings';
 
 export {PENDING_DATA_PLACEHOLDER} from 'app/plugin/objtypes';
 
+export interface FormatOptions {
+  [option: string]: any;
+}
+
 /**
  * Formats a value of any type generically (with no type-specific options).
  */
@@ -46,7 +51,7 @@ export type IsRightTypeFunc = (value: CellValue) => boolean;
 export class BaseFormatter {
   public readonly isRightType: IsRightTypeFunc;
 
-  constructor(public type: string, public opts: object) {
+  constructor(public type: string, public widgetOpts: object, public docSettings: DocumentSettings) {
     this.isRightType = gristTypes.isRightType(gristTypes.extractTypeFromColType(type)) ||
       gristTypes.isRightType('Any')!;
   }
@@ -78,9 +83,9 @@ export class NumericFormatter extends BaseFormatter {
   private _numFormat: Intl.NumberFormat;
   private _formatter: (val: number) => string;
 
-  constructor(type: string, options: NumberFormatOptions) {
+  constructor(type: string, options: NumberFormatOptions, docSettings: DocumentSettings) {
-    super(type, options);
+    super(type, options, docSettings);
-    this._numFormat = buildNumberFormat(options);
+    this._numFormat = buildNumberFormat(options, docSettings);
     this._formatter = (options.numSign === 'parens') ? this._formatParens : this._formatPlain;
   }
 
@@ -101,18 +106,22 @@ export class NumericFormatter extends BaseFormatter {
 }
 
 class IntFormatter extends NumericFormatter {
-  constructor(type: string, opts: object) {
+  constructor(type: string, opts: FormatOptions, docSettings: DocumentSettings) {
-    super(type, {decimals: 0, ...opts});
+    super(type, {decimals: 0, ...opts}, docSettings);
   }
 }
 
+interface DateFormatOptions {
+  dateFormat?: string;
+}
+
 class DateFormatter extends BaseFormatter {
   private _dateTimeFormat: string;
   private _timezone: string;
 
-  constructor(type: string, opts: {dateFormat?: string}, timezone: string = 'UTC') {
+  constructor(type: string, widgetOpts: DateFormatOptions, docSettings: DocumentSettings, timezone: string = 'UTC') {
-    super(type, opts);
+    super(type, widgetOpts, docSettings);
-    this._dateTimeFormat = opts.dateFormat || 'YYYY-MM-DD';
+    this._dateTimeFormat = widgetOpts.dateFormat || 'YYYY-MM-DD';
     this._timezone = timezone;
   }
 
@@ -123,12 +132,16 @@ class DateFormatter extends BaseFormatter {
   }
 }
 
+interface DateTimeFormatOptions extends DateFormatOptions {
+  timeFormat?: string;
+}
+
 class DateTimeFormatter extends DateFormatter {
-  constructor(type: string, opts: {dateFormat?: string; timeFormat?: string}) {
+  constructor(type: string, widgetOpts: DateTimeFormatOptions, docSettings: DocumentSettings) {
     const timezone = gutil.removePrefix(type, "DateTime:") || '';
-    const timeFormat = opts.timeFormat === undefined ? 'h:mma' : opts.timeFormat;
+    const timeFormat = widgetOpts.timeFormat === undefined ? 'h:mma' : widgetOpts.timeFormat;
-    const dateFormat = (opts.dateFormat || 'YYYY-MM-DD') + " " + timeFormat;
+    const dateFormat = (widgetOpts.dateFormat || 'YYYY-MM-DD') + " " + timeFormat;
-    super(type, {dateFormat}, timezone);
+    super(type, {dateFormat}, docSettings, timezone);
   }
 }
 
@@ -142,10 +155,11 @@ const formatters: {[name: string]: typeof BaseFormatter} = {
 };
 
 /**
- * Takes column type and widget options and returns a constructor with a format function that can
+ * Takes column type, widget options and document settings, and returns a constructor
- * properly convert a value passed to it into the right format for that column.
+ * with a format function that can properly convert a value passed to it into the
+ * right format for that column.
  */
-export function createFormatter(type: string, opts: object): BaseFormatter {
+export function createFormatter(type: string, widgetOpts: FormatOptions, docSettings: DocumentSettings): BaseFormatter {
   const ctor = formatters[gristTypes.extractTypeFromColType(type)] || AnyFormatter;
-  return new ctor(type, opts);
+  return new ctor(type, widgetOpts, docSettings);
 }

app/common/declarations.d.ts

@@ -3,3 +3,21 @@ declare module "app/common/MemBuffer" {
   type MemBuffer = any;
   export = MemBuffer;
 }
+
+declare module "locale-currency/map" {
+  const Map: Record<string, string>;
+  type Map = Record<string, string>;
+  export = Map;
+}
+
+declare namespace Intl {
+  class DisplayNames {
+    constructor(locales?: string, options?: object);
+    public of(code: string): string;
+  }
+
+  class Locale {
+    public region: string;
+    constructor(locale: string);
+  }
+}

app/common/schema.ts

@@ -9,6 +9,7 @@ export const schema = {
     basketId            : "Text",
     schemaVersion       : "Int",
     timezone            : "Text",
+    documentSettings    : "Text",
   },
 
   "_grist_Tables": {
@@ -182,6 +183,7 @@ export interface SchemaTypes {
     basketId: string;
     schemaVersion: number;
     timezone: string;
+    documentSettings: string;
   };
 
   "_grist_Tables": {

app/server/lib/ActiveDoc.ts

@@ -85,6 +85,7 @@ bluebird.promisifyAll(tmp);
 const MAX_RECENT_ACTIONS = 100;
 
 const DEFAULT_TIMEZONE = (process.versions as any).electron ? moment.tz.guess() : "UTC";
+const DEFAULT_LOCALE = "en-US";
 
 // Number of seconds an ActiveDoc is retained without any clients.
 // In dev environment, it is convenient to keep this low for quick tests.
@@ -338,10 +339,11 @@ export class ActiveDoc extends EventEmitter {
     await this._docManager.storageManager.prepareToCreateDoc(this.docName);
     await this.docStorage.createFile();
     await this._rawPyCall('load_empty');
-    const timezone = docSession.browserSettings ? docSession.browserSettings.timezone : DEFAULT_TIMEZONE;
+    const timezone = docSession.browserSettings?.timezone ?? DEFAULT_TIMEZONE;
+    const locale = docSession.browserSettings?.locale ?? DEFAULT_LOCALE;
     // This init action is special. It creates schema tables, and is used to init the DB, but does
     // not go through other steps of a regular action (no ActionHistory or broadcasting).
-    const initBundle = await this._rawPyCall('apply_user_actions', [["InitNewDoc", timezone]]);
+    const initBundle = await this._rawPyCall('apply_user_actions', [["InitNewDoc", timezone, locale]]);
     await this.docStorage.execTransaction(() =>
       this.docStorage.applyStoredActions(getEnvContent(initBundle.stored)));
 

app/server/lib/Client.ts

@@ -84,7 +84,8 @@ export class Client {
   constructor(
     private _comm: any,
     private _methods: any,
-    private _host: string
+    private _host: string,
+    private _locale?: string,
   ) {
     this.clientId = generateClientId();
   }
@@ -102,6 +103,10 @@ export class Client {
     return this._host;
   }
 
+  public get locale(): string|undefined {
+    return this._locale;
+  }
+
   public setConnection(websocket: any, reqHost: string, browserSettings: BrowserSettings) {
     this._websocket = websocket;
     // Set this._loginState, used by CognitoClient to construct login/logout URLs.

app/server/lib/Comm.js

@@ -49,6 +49,7 @@ var gutil = require('app/common/gutil');
 const {parseFirstUrlPart} = require('app/common/gristUrls');
 const version = require('app/common/version');
 const {Client} = require('./Client');
+const {localeFromRequest} = require('app/server/lib/ServerLocale');
 
 // Bluebird promisification, to be able to use e.g. websocket.sendAsync method.
 Promise.promisifyAll(ws.prototype);
@@ -216,7 +217,7 @@ Comm.prototype._onWebSocketConnection = async function(websocket, req) {
     }
     client.setConnection(websocket, req.headers.host, browserSettings);
   } else {
-    client = new Client(this, this.methods, req.headers.host);
+    client = new Client(this, this.methods, req.headers.host, localeFromRequest(req));
     client.setCounter(counter);
     client.setConnection(websocket, req.headers.host, browserSettings);
     this._clients[client.clientId] = client;

app/server/lib/DocApi.ts

@@ -32,6 +32,7 @@ import { exportToDrive } from "app/server/lib/GoogleExport";
 import { googleAuthTokenMiddleware } from "app/server/lib/GoogleAuth";
 import * as _ from "lodash";
 import {isRaisedException} from "app/common/gristTypes";
+import {localeFromRequest} from "app/server/lib/ServerLocale";
 
 // Cap on the number of requests that can be outstanding on a single document via the
 // rest doc api.  When this limit is exceeded, incoming requests receive an immediate
@@ -590,6 +591,7 @@ export class DocWorkerApi {
       if (parameters.workspaceId) { throw new Error('workspaceId not supported'); }
       const browserSettings: BrowserSettings = {};
       if (parameters.timezone) { browserSettings.timezone = parameters.timezone; }
+      browserSettings.locale = localeFromRequest(req);
       if (uploadId !== undefined) {
         const result = await this._docManager.importDocToWorkspace(userId, uploadId, null,
                                                                    browserSettings);

app/server/lib/DocSession.ts

@@ -24,6 +24,7 @@ export interface OptDocSession {
 
 export function makeOptDocSession(client: Client|null, browserSettings?: BrowserSettings): OptDocSession {
   if (client && !browserSettings) { browserSettings = client.browserSettings; }
+  if (client && browserSettings && !browserSettings.locale) { browserSettings.locale = client.locale; }
   return {client, browserSettings};
 }
 

app/server/lib/ExcelFormatter.ts

@@ -3,7 +3,7 @@ import {GristType} from 'app/common/gristTypes';
 import * as gutil from 'app/common/gutil';
 import * as gristTypes from 'app/common/gristTypes';
 import {NumberFormatOptions} from 'app/common/NumberFormat';
-import {formatUnknown, IsRightTypeFunc} from 'app/common/ValueFormatter';
+import {FormatOptions, formatUnknown, IsRightTypeFunc} from 'app/common/ValueFormatter';
 import {decodeObject} from 'app/plugin/objtypes';
 import {Style} from 'exceljs';
 import * as moment from 'moment-timezone';
@@ -17,9 +17,9 @@ interface WidgetOptions extends NumberFormatOptions {
 }
 class BaseFormatter {
   protected isRightType: IsRightTypeFunc;
-  protected widgetOptions: WidgetOptions = {};
+  protected widgetOptions: WidgetOptions;
 
-  constructor(public type: string, public opts: object) {
+  constructor(public type: string, public opts: FormatOptions) {
     this.isRightType = gristTypes.isRightType(gristTypes.extractTypeFromColType(type)) ||
       gristTypes.isRightType('Any')!;
     this.widgetOptions = opts;
@@ -164,11 +164,11 @@ const formatters: Partial<Record<GristType, typeof BaseFormatter>> = {
 };
 
 /**
- * Takes column type and widget options and returns a constructor with a format function that can
+ * Takes column type and format options and returns a constructor with a format function that can
  * properly convert a value passed to it into the right javascript object for that column.
  * Exceljs library is using javascript primitives to specify correct excel type.
  */
-export function createExcelFormatter(type: string, opts: object): BaseFormatter {
+export function createExcelFormatter(type: string, opts: FormatOptions): BaseFormatter {
   const ctor = formatters[gristTypes.extractTypeFromColType(type) as GristType] || AnyFormatter;
   return new ctor(type, opts);
 }

app/server/lib/Export.ts

@@ -7,6 +7,7 @@ import {buildRowFilter} from 'app/common/RowFilterFunc';
 import {SchemaTypes} from 'app/common/schema';
 import {SortFunc} from 'app/common/SortFunc';
 import {TableData} from 'app/common/TableData';
+import {DocumentSettings} from 'app/common/DocumentSettings';
 import {ActiveDoc} from 'app/server/lib/ActiveDoc';
 import {RequestWithLogin} from 'app/server/lib/Authorizer';
 import {docSessionFromRequest} from 'app/server/lib/DocSession';
@@ -60,6 +61,10 @@ export interface ExportData {
    * Columns information (primary used for formatting).
    */
   columns: ExportColumn[];
+  /**
+   * Document settings
+   */
+  docSettings: DocumentSettings;
 }
 
 /**
@@ -194,12 +199,15 @@ export async function exportTable(
     tableName = view.name;
   }
 
+  const docInfo = safeRecord(safeTable(docData, '_grist_DocInfo'), 1) as DocInfo;
+  const docSettings = gutil.safeJsonParse(docInfo.documentSettings, {});
   return {
     tableName,
     docName: activeDoc.docName,
     rowIds,
     access,
-    columns
+    columns,
+    docSettings
   };
 }
 
@@ -277,11 +285,15 @@ export async function exportSection(
   // filter rows numbers
   rowIds = rowIds.filter(rowFilter);
 
+  const docInfo = safeRecord(safeTable(docData, '_grist_DocInfo'), 1) as DocInfo;
+  const docSettings = gutil.safeJsonParse(docInfo.documentSettings, {});
+
   return {
     tableName: table.tableId,
     docName: activeDoc.docName,
     rowIds,
     access,
+    docSettings,
     columns: viewColumns
   };
 }
@@ -295,6 +307,7 @@ type GristTables = RowModel<'_grist_Tables'>
 type GristViewsSectionField = RowModel<'_grist_Views_section_field'>
 type GristTablesColumn = RowModel<'_grist_Tables_column'>
 type GristView = RowModel<'_grist_Views'>
+type DocInfo = RowModel<'_grist_DocInfo'>
 
 // Type for filters passed from the client
 export interface Filter { colRef: number, filter: string }

app/server/lib/ExportCSV.ts

@@ -33,11 +33,12 @@ export async function makeCSV(
 function convertToCsv({
   rowIds,
   access,
-  columns: viewColumns
+  columns: viewColumns,
+  docSettings
 }: ExportData) {
 
   // create formatters for columns
-  const formatters = viewColumns.map(col => createFormatter(col.type, col.widgetOptions));
+  const formatters = viewColumns.map(col => createFormatter(col.type, col.widgetOptions, docSettings));
   // Arrange the data into a row-indexed matrix, starting with column headers.
   const csvMatrix = [viewColumns.map(col => col.label)];
   // populate all the rows with values as strings

app/server/lib/ServerLocale.ts

@@ -0,0 +1,16 @@
+import {parse as languageParser} from "accept-language-parser";
+import {Request} from 'express';
+import {locales} from 'app/common/Locales';
+
+/**
+ * Returns the locale from a request, falling back to `defaultLocale`
+ * if unable to determine the locale.
+ */
+export function localeFromRequest(req: Request, defaultLocale: string = 'en-US') {
+  const language = languageParser(req.headers["accept-language"] as string)[0];
+  if (!language) { return defaultLocale; }
+
+  const locale = `${language.code}-${language.region}`;
+  const supports = locales.some(l => l.code === locale);
+  return supports ? locale : defaultLocale;
+}

app/server/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "extends": "../../buildtools/tsconfig-base.json",
   "references": [
-    { "path": "../common" }
+    { "path": "../common" },
   ],
   "include": [
     "**/*",

sandbox/grist/migrations.py

@@ -788,3 +788,10 @@ def migration22(tdset):
     add_column('_grist_Tables_column', 'recalcWhen', 'Int'),
     add_column('_grist_Tables_column', 'recalcDeps', 'RefList:_grist_Tables_column'),
   ])
+
+@migration(schema_version=23)
+def migration23(tdset):
+  return tdset.apply_doc_actions([
+    add_column('_grist_DocInfo', 'documentSettings', 'Text'),
+    actions.UpdateRecord('_grist_DocInfo', 1, {'documentSettings': '{"locale":"en-US"}'})
+  ])

sandbox/grist/schema.py

@@ -15,7 +15,7 @@ import six
 
 import actions
 
-SCHEMA_VERSION = 22
+SCHEMA_VERSION = 23
 
 def make_column(col_id, col_type, formula='', isFormula=False):
   return {
@@ -40,6 +40,9 @@ def schema_create_actions():
 
       # Document timezone.
       make_column("timezone", "Text"),
+
+      # Document settings (excluding timezone).
+      make_column("documentSettings", "Text"), # JSON string describing document settings
     ]),
 
     # The names of the user tables. This does NOT include built-in tables.

sandbox/grist/useractions.py

@@ -193,13 +193,14 @@ class UserActions(object):
   #----------------------------------------
 
   @useraction
-  def InitNewDoc(self, timezone):
+  def InitNewDoc(self, timezone, locale):
     creation_actions = schema.schema_create_actions()
     self._engine.out_actions.stored.extend(creation_actions)
     self._engine.out_actions.direct += [True] * len(creation_actions)
     self._do_doc_action(actions.AddRecord("_grist_DocInfo", 1,
                                           {'schemaVersion': schema.SCHEMA_VERSION,
-                                           'timezone': timezone}))
+                                           'timezone': timezone,
+                                           'documentSettings': json.dumps({'locale': locale})}))
 
     # Set up initial ACL data.
     # NOTE The special records below are not actually used. They were intended for obsolete ACL

test/nbrowser/gristUtils.ts

@@ -1621,17 +1621,27 @@ export function addSamplesForSuite() {
   });
 }
 
-export async function openUserProfile() {
+async function openAccountMenu() {
   await driver.findWait('.test-dm-account', 1000).click();
   // Since the AccountWidget loads orgs and the user data asynchronously, the menu
   // can expand itself causing the click to land on a wrong button.
   await waitForServer();
   await driver.findWait('.test-usermenu-org', 1000);
   await driver.sleep(250);  // There's still some jitter (scroll-bar? other user accounts?)
+}
+
+export async function openUserProfile() {
+  await openAccountMenu();
   await driver.findContent('.grist-floating-menu li', 'Profile Settings').click();
   await driver.findWait('.test-login-method', 5000);
 }
 
+export async function openDocumentSettings() {
+  await openAccountMenu();
+  await driver.findContent('.grist-floating-menu li', 'Document Settings').click();
+  await driver.findWait('.test-modal-title', 5000);
+}
+
 } // end of namespace gristUtils
 
 stackWrapOwnMethods(gristUtils);