Merge pull request #5452 from SimonBrandner/feature-multi-language-spell-check

Add multi language spell check

src/components/views/elements/LanguageDropdown.js

@@ -100,10 +100,10 @@ export default class LanguageDropdown extends React.Component {
         let language = SettingsStore.getValue("language", null, /*excludeDefault:*/true);
         let value = null;
         if (language) {
-          value = this.props.value || language;
+            value = this.props.value || language;
         } else {
-          language = navigator.language || navigator.userLanguage;
-          value = this.props.value || language;
+            language = navigator.language || navigator.userLanguage;
+            value = this.props.value || language;
         }
 
         return <Dropdown

src/components/views/elements/SpellCheckLanguagesDropdown.tsx

@@ -0,0 +1,126 @@
+/*
+Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+
+import Dropdown from "../../views/elements/Dropdown"
+import * as sdk from '../../../index';
+import PlatformPeg from "../../../PlatformPeg";
+import SettingsStore from "../../../settings/SettingsStore";
+import { _t } from "../../../languageHandler";
+
+function languageMatchesSearchQuery(query, language) {
+    if (language.label.toUpperCase().includes(query.toUpperCase())) return true;
+    if (language.value.toUpperCase() === query.toUpperCase()) return true;
+    return false;
+}
+
+interface SpellCheckLanguagesDropdownIProps {
+    className: string,
+    value: string,
+    onOptionChange(language: string),
+}
+
+interface SpellCheckLanguagesDropdownIState {
+    searchQuery: string,
+    languages: any,
+}
+
+export default class SpellCheckLanguagesDropdown extends React.Component<SpellCheckLanguagesDropdownIProps,
+                                                                         SpellCheckLanguagesDropdownIState> {
+    constructor(props) {
+        super(props);
+        this._onSearchChange = this._onSearchChange.bind(this);
+
+        this.state = {
+            searchQuery: '',
+            languages: null,
+        };
+    }
+
+    componentDidMount() {
+        const plaf = PlatformPeg.get();
+        if (plaf) {
+            plaf.getAvailableSpellCheckLanguages().then((languages) => {
+                languages.sort(function(a, b) {
+                    if (a < b) return -1;
+                    if (a > b) return 1;
+                    return 0;
+                });
+                const langs = [];
+                languages.forEach((language) => {
+                    langs.push({
+                        label: language,
+                        value: language,
+                    })
+                })
+                this.setState({languages: langs});
+            }).catch((e) => {
+                this.setState({languages: ['en']});
+            });
+        }
+    }
+
+    _onSearchChange(search) {
+        this.setState({
+            searchQuery: search,
+        });
+    }
+
+    render() {
+        if (this.state.languages === null) {
+            const Spinner = sdk.getComponent('elements.Spinner');
+            return <Spinner />;
+        }
+
+        let displayedLanguages;
+        if (this.state.searchQuery) {
+            displayedLanguages = this.state.languages.filter((lang) => {
+                return languageMatchesSearchQuery(this.state.searchQuery, lang);
+            });
+        } else {
+            displayedLanguages = this.state.languages;
+        }
+
+        const options = displayedLanguages.map((language) => {
+            return <div key={language.value}>
+                { language.label }
+            </div>;
+        });
+
+        // default value here too, otherwise we need to handle null / undefined;
+        // values between mounting and the initial value propgating
+        let language = SettingsStore.getValue("language", null, /*excludeDefault:*/true);
+        let value = null;
+        if (language) {
+            value = this.props.value || language;
+        } else {
+            language = navigator.language || navigator.userLanguage;
+            value = this.props.value || language;
+        }
+
+        return <Dropdown
+            id="mx_LanguageDropdown"
+            className={this.props.className}
+            onOptionChange={this.props.onOptionChange}
+            onSearchChange={this._onSearchChange}
+            searchEnabled={true}
+            value={value}
+            label={_t("Language Dropdown")}>
+            { options }
+        </Dropdown>;
+    }
+}