Merge branch 'master' into testing

13 files changed, 291 insertions, 171 deletions

diff --git a/ext/bg/data/options-schema.json b/ext/bg/data/options-schema.json
index da1f1ce0..4f9e694d 100644
--- a/ext/bg/data/options-schema.json
+++ b/ext/bg/data/options-schema.json
@@ -388,7 +388,8 @@
                                     "convertNumericCharacters",
                                     "convertAlphabeticCharacters",
                                     "convertHiraganaToKatakana",
-                                    "convertKatakanaToHiragana"
+                                    "convertKatakanaToHiragana",
+                                    "collapseEmphaticSequences"
                                 ],
                                 "properties": {
                                     "convertHalfWidthCharacters": {
@@ -415,6 +416,11 @@
                                         "type": "string",
                                         "enum": ["false", "true", "variant"],
                                         "default": "variant"
+                                    },
+                                    "collapseEmphaticSequences": {
+                                        "type": "string",
+                                        "enum": ["false", "true", "full"],
+                                        "default": "false"
                                     }
                                 }
                             },
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index 6386319b..2265c1a9 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -30,7 +30,6 @@
  * Translator
  * conditionsTestValue
  * dictConfigured
- * dictEnabledSet
  * dictTermsSort
  * handlebarsRenderDynamic
  * jp
@@ -76,33 +75,32 @@ class Backend {
         this.messageToken = yomichan.generateId(16);
 
         this._messageHandlers = new Map([
-            ['yomichanCoreReady', this._onApiYomichanCoreReady.bind(this)],
-            ['optionsSchemaGet', this._onApiOptionsSchemaGet.bind(this)],
-            ['optionsGet', this._onApiOptionsGet.bind(this)],
-            ['optionsGetFull', this._onApiOptionsGetFull.bind(this)],
-            ['optionsSet', this._onApiOptionsSet.bind(this)],
-            ['optionsSave', this._onApiOptionsSave.bind(this)],
-            ['kanjiFind', this._onApiKanjiFind.bind(this)],
-            ['termsFind', this._onApiTermsFind.bind(this)],
-            ['textParse', this._onApiTextParse.bind(this)],
-            ['textParseMecab', this._onApiTextParseMecab.bind(this)],
-            ['definitionAdd', this._onApiDefinitionAdd.bind(this)],
-            ['definitionsAddable', this._onApiDefinitionsAddable.bind(this)],
-            ['noteView', this._onApiNoteView.bind(this)],
-            ['templateRender', this._onApiTemplateRender.bind(this)],
-            ['commandExec', this._onApiCommandExec.bind(this)],
-            ['audioGetUri', this._onApiAudioGetUri.bind(this)],
-            ['screenshotGet', this._onApiScreenshotGet.bind(this)],
-            ['forward', this._onApiForward.bind(this)],
-            ['frameInformationGet', this._onApiFrameInformationGet.bind(this)],
-            ['injectStylesheet', this._onApiInjectStylesheet.bind(this)],
-            ['getEnvironmentInfo', this._onApiGetEnvironmentInfo.bind(this)],
-            ['clipboardGet', this._onApiClipboardGet.bind(this)],
-            ['getDisplayTemplatesHtml', this._onApiGetDisplayTemplatesHtml.bind(this)],
-            ['getQueryParserTemplatesHtml', this._onApiGetQueryParserTemplatesHtml.bind(this)],
-            ['getZoom', this._onApiGetZoom.bind(this)],
-            ['getMessageToken', this._onApiGetMessageToken.bind(this)],
-            ['getDefaultAnkiFieldTemplates', this._onApiGetDefaultAnkiFieldTemplates.bind(this)]
+            ['yomichanCoreReady', {handler: this._onApiYomichanCoreReady.bind(this), async: false}],
+            ['optionsSchemaGet', {handler: this._onApiOptionsSchemaGet.bind(this), async: false}],
+            ['optionsGet', {handler: this._onApiOptionsGet.bind(this), async: false}],
+            ['optionsGetFull', {handler: this._onApiOptionsGetFull.bind(this), async: false}],
+            ['optionsSet', {handler: this._onApiOptionsSet.bind(this), async: true}],
+            ['optionsSave', {handler: this._onApiOptionsSave.bind(this), async: true}],
+            ['kanjiFind', {handler: this._onApiKanjiFind.bind(this), async: true}],
+            ['termsFind', {handler: this._onApiTermsFind.bind(this), async: true}],
+            ['textParse', {handler: this._onApiTextParse.bind(this), async: true}],
+            ['definitionAdd', {handler: this._onApiDefinitionAdd.bind(this), async: true}],
+            ['definitionsAddable', {handler: this._onApiDefinitionsAddable.bind(this), async: true}],
+            ['noteView', {handler: this._onApiNoteView.bind(this), async: true}],
+            ['templateRender', {handler: this._onApiTemplateRender.bind(this), async: true}],
+            ['commandExec', {handler: this._onApiCommandExec.bind(this), async: false}],
+            ['audioGetUri', {handler: this._onApiAudioGetUri.bind(this), async: true}],
+            ['screenshotGet', {handler: this._onApiScreenshotGet.bind(this), async: true}],
+            ['broadcastTab', {handler: this._onApiBroadcastTab.bind(this), async: false}],
+            ['frameInformationGet', {handler: this._onApiFrameInformationGet.bind(this), async: true}],
+            ['injectStylesheet', {handler: this._onApiInjectStylesheet.bind(this), async: true}],
+            ['getEnvironmentInfo', {handler: this._onApiGetEnvironmentInfo.bind(this), async: true}],
+            ['clipboardGet', {handler: this._onApiClipboardGet.bind(this), async: true}],
+            ['getDisplayTemplatesHtml', {handler: this._onApiGetDisplayTemplatesHtml.bind(this), async: true}],
+            ['getQueryParserTemplatesHtml', {handler: this._onApiGetQueryParserTemplatesHtml.bind(this), async: true}],
+            ['getZoom', {handler: this._onApiGetZoom.bind(this), async: true}],
+            ['getMessageToken', {handler: this._onApiGetMessageToken.bind(this), async: false}],
+            ['getDefaultAnkiFieldTemplates', {handler: this._onApiGetDefaultAnkiFieldTemplates.bind(this), async: false}]
         ]);
 
         this._commandHandlers = new Map([
@@ -166,16 +164,23 @@ class Backend {
     }
 
     onMessage({action, params}, sender, callback) {
-        const handler = this._messageHandlers.get(action);
-        if (typeof handler !== 'function') { return false; }
+        const messageHandler = this._messageHandlers.get(action);
+        if (typeof messageHandler === 'undefined') { return false; }
+
+        const {handler, async} = messageHandler;
 
         try {
-            const promise = handler(params, sender);
-            promise.then(
-                (result) => callback({result}),
-                (error) => callback({error: errorToJson(error)})
-            );
-            return true;
+            const promiseOrResult = handler(params, sender);
+            if (async) {
+                promiseOrResult.then(
+                    (result) => callback({result}),
+                    (error) => callback({error: errorToJson(error)})
+                );
+                return true;
+            } else {
+                callback({result: promiseOrResult});
+                return false;
+            }
         } catch (error) {
             callback({error: errorToJson(error)});
             return false;
@@ -308,31 +313,84 @@ class Backend {
         return await this.dictionaryImporter.import(this.database, archiveSource, onProgress, details);
     }
 
+    async _textParseScanning(text, options) {
+        const results = [];
+        while (text.length > 0) {
+            const term = [];
+            const [definitions, sourceLength] = await this.translator.findTerms(
+                'simple',
+                text.substring(0, options.scanning.length),
+                {},
+                options
+            );
+            if (definitions.length > 0 && sourceLength > 0) {
+                dictTermsSort(definitions);
+                const {expression, reading} = definitions[0];
+                const source = text.substring(0, sourceLength);
+                for (const {text: text2, furigana} of jp.distributeFuriganaInflected(expression, reading, source)) {
+                    const reading2 = jp.convertReading(text2, furigana, options.parsing.readingMode);
+                    term.push({text: text2, reading: reading2});
+                }
+                text = text.substring(source.length);
+            } else {
+                const reading = jp.convertReading(text[0], '', options.parsing.readingMode);
+                term.push({text: text[0], reading});
+                text = text.substring(1);
+            }
+            results.push(term);
+        }
+        return results;
+    }
+
+    async _textParseMecab(text, options) {
+        const results = [];
+        const rawResults = await this.mecab.parseText(text);
+        for (const [mecabName, parsedLines] of Object.entries(rawResults)) {
+            const result = [];
+            for (const parsedLine of parsedLines) {
+                for (const {expression, reading, source} of parsedLine) {
+                    const term = [];
+                    for (const {text: text2, furigana} of jp.distributeFuriganaInflected(
+                        expression.length > 0 ? expression : source,
+                        jp.convertKatakanaToHiragana(reading),
+                        source
+                    )) {
+                        const reading2 = jp.convertReading(text2, furigana, options.parsing.readingMode);
+                        term.push({text: text2, reading: reading2});
+                    }
+                    result.push(term);
+                }
+                result.push([{text: '\n', reading: ''}]);
+            }
+            results.push([mecabName, result]);
+        }
+        return results;
+    }
+
     // Message handlers
 
     _onApiYomichanCoreReady(_params, sender) {
         // tab ID isn't set in background (e.g. browser_action)
+        const callback = () => this.checkLastError(chrome.runtime.lastError);
+        const data = {action: 'backendPrepared'};
         if (typeof sender.tab === 'undefined') {
-            const callback = () => this.checkLastError(chrome.runtime.lastError);
-            chrome.runtime.sendMessage({action: 'backendPrepared'}, callback);
-            return Promise.resolve();
+            chrome.runtime.sendMessage(data, callback);
+            return false;
+        } else {
+            chrome.tabs.sendMessage(sender.tab.id, data, callback);
+            return true;
         }
-
-        const tabId = sender.tab.id;
-        return new Promise((resolve) => {
-            chrome.tabs.sendMessage(tabId, {action: 'backendPrepared'}, resolve);
-        });
     }
 
-    async _onApiOptionsSchemaGet() {
+    _onApiOptionsSchemaGet() {
         return this.getOptionsSchema();
     }
 
-    async _onApiOptionsGet({optionsContext}) {
+    _onApiOptionsGet({optionsContext}) {
         return this.getOptions(optionsContext);
     }
 
-    async _onApiOptionsGetFull() {
+    _onApiOptionsGetFull() {
         return this.getFullOptions();
     }
 
@@ -400,61 +458,27 @@ class Backend {
     async _onApiTextParse({text, optionsContext}) {
         const options = this.getOptions(optionsContext);
         const results = [];
-        while (text.length > 0) {
-            const term = [];
-            const [definitions, sourceLength] = await this.translator.findTerms(
-                'simple',
-                text.substring(0, options.scanning.length),
-                {},
-                options
-            );
-            if (definitions.length > 0) {
-                dictTermsSort(definitions);
-                const {expression, reading} = definitions[0];
-                const source = text.substring(0, sourceLength);
-                for (const {text: text2, furigana} of jp.distributeFuriganaInflected(expression, reading, source)) {
-                    const reading2 = jp.convertReading(text2, furigana, options.parsing.readingMode);
-                    term.push({text: text2, reading: reading2});
-                }
-                text = text.substring(source.length);
-            } else {
-                const reading = jp.convertReading(text[0], null, options.parsing.readingMode);
-                term.push({text: text[0], reading});
-                text = text.substring(1);
-            }
-            results.push(term);
+
+        if (options.parsing.enableScanningParser) {
+            results.push({
+                source: 'scanning-parser',
+                id: 'scan',
+                content: await this._textParseScanning(text, options)
+            });
         }
-        return results;
-    }
 
-    async _onApiTextParseMecab({text, optionsContext}) {
-        const options = this.getOptions(optionsContext);
-        const results = [];
-        const rawResults = await this.mecab.parseText(text);
-        for (const [mecabName, parsedLines] of Object.entries(rawResults)) {
-            const result = [];
-            for (const parsedLine of parsedLines) {
-                for (const {expression, reading, source} of parsedLine) {
-                    const term = [];
-                    if (expression !== null && reading !== null) {
-                        for (const {text: text2, furigana} of jp.distributeFuriganaInflected(
-                            expression,
-                            jp.convertKatakanaToHiragana(reading),
-                            source
-                        )) {
-                            const reading2 = jp.convertReading(text2, furigana, options.parsing.readingMode);
-                            term.push({text: text2, reading: reading2});
-                        }
-                    } else {
-                        const reading2 = jp.convertReading(source, null, options.parsing.readingMode);
-                        term.push({text: source, reading: reading2});
-                    }
-                    result.push(term);
-                }
-                result.push([{text: '\n'}]);
+        if (options.parsing.enableMecabParser) {
+            const mecabResults = await this._textParseMecab(text, options);
+            for (const [mecabDictName, mecabDictResults] of mecabResults) {
+                results.push({
+                    source: 'mecab',
+                    dictionary: mecabDictName,
+                    id: `mecab-${mecabDictName}`,
+                    content: mecabDictResults
+                });
             }
-            results.push([mecabName, result]);
         }
+
         return results;
     }
 
@@ -539,7 +563,7 @@ class Backend {
         return this._renderTemplate(template, data);
     }
 
-    async _onApiCommandExec({command, params}) {
+    _onApiCommandExec({command, params}) {
         return this._runCommand(command, params);
     }
 
@@ -559,15 +583,15 @@ class Backend {
         });
     }
 
-    _onApiForward({action, params}, sender) {
+    _onApiBroadcastTab({action, params}, sender) {
         if (!(sender && sender.tab)) {
-            return Promise.resolve();
+            return false;
         }
 
         const tabId = sender.tab.id;
-        return new Promise((resolve) => {
-            chrome.tabs.sendMessage(tabId, {action, params}, (response) => resolve(response));
-        });
+        const callback = () => this.checkLastError(chrome.runtime.lastError);
+        chrome.tabs.sendMessage(tabId, {action, params}, callback);
+        return true;
     }
 
     _onApiFrameInformationGet(params, sender) {
@@ -690,11 +714,11 @@ class Backend {
         });
     }
 
-    async _onApiGetMessageToken() {
+    _onApiGetMessageToken() {
         return this.messageToken;
     }
 
-    async _onApiGetDefaultAnkiFieldTemplates() {
+    _onApiGetDefaultAnkiFieldTemplates() {
         return this.defaultAnkiFieldTemplates;
     }
 
diff --git a/ext/bg/js/database.js b/ext/bg/js/database.js
index ad4e3bad..260c815a 100644
--- a/ext/bg/js/database.js
+++ b/ext/bg/js/database.js
@@ -16,10 +16,7 @@
  */
 
 /* global
- * JSZip
- * JsonSchema
  * dictFieldSplit
- * requestJson
  */
 
 class Database {
diff --git a/ext/bg/js/japanese.js b/ext/bg/js/japanese.js
index 5c49cca7..ac81acb5 100644
--- a/ext/bg/js/japanese.js
+++ b/ext/bg/js/japanese.js
@@ -82,6 +82,9 @@
 
     const ITERATION_MARK_CODE_POINT = 0x3005;
 
+    const HIRAGANA_SMALL_TSU_CODE_POINT = 0x3063;
+    const KATAKANA_SMALL_TSU_CODE_POINT = 0x30c3;
+    const KANA_PROLONGED_SOUND_MARK_CODE_POINT = 0x30fc;
 
     // Existing functions
 
@@ -121,25 +124,25 @@
         return wanakana.toRomaji(text);
     }
 
-    function convertReading(expressionFragment, readingFragment, readingMode) {
+    function convertReading(expression, reading, readingMode) {
         switch (readingMode) {
             case 'hiragana':
-                return convertKatakanaToHiragana(readingFragment || '');
+                return convertKatakanaToHiragana(reading);
             case 'katakana':
-                return convertHiraganaToKatakana(readingFragment || '');
+                return convertHiraganaToKatakana(reading);
             case 'romaji':
-                if (readingFragment) {
-                    return convertToRomaji(readingFragment);
+                if (reading) {
+                    return convertToRomaji(reading);
                 } else {
-                    if (isStringEntirelyKana(expressionFragment)) {
-                        return convertToRomaji(expressionFragment);
+                    if (isStringEntirelyKana(expression)) {
+                        return convertToRomaji(expression);
                     }
                 }
-                return readingFragment;
+                return reading;
             case 'none':
-                return null;
+                return '';
             default:
-                return readingFragment;
+                return reading;
         }
     }
 
@@ -297,7 +300,7 @@
                     const readingLeft = reading2.substring(group.text.length);
                     const segs = segmentize(readingLeft, groups.splice(1));
                     if (segs) {
-                        return [{text: group.text}].concat(segs);
+                        return [{text: group.text, furigana: ''}].concat(segs);
                     }
                 }
             } else {
@@ -365,13 +368,47 @@
         }
 
         if (stemLength !== source.length) {
-            output.push({text: source.substring(stemLength)});
+            output.push({text: source.substring(stemLength), furigana: ''});
         }
 
         return output;
     }
 
 
+    // Miscellaneous
+
+    function collapseEmphaticSequences(text, fullCollapse, sourceMap=null) {
+        let result = '';
+        let collapseCodePoint = -1;
+        const hasSourceMap = (sourceMap !== null);
+        for (const char of text) {
+            const c = char.codePointAt(0);
+            if (
+                c === HIRAGANA_SMALL_TSU_CODE_POINT ||
+                c === KATAKANA_SMALL_TSU_CODE_POINT ||
+                c === KANA_PROLONGED_SOUND_MARK_CODE_POINT
+            ) {
+                if (collapseCodePoint !== c) {
+                    collapseCodePoint = c;
+                    if (!fullCollapse) {
+                        result += char;
+                        continue;
+                    }
+                }
+            } else {
+                collapseCodePoint = -1;
+                result += char;
+                continue;
+            }
+
+            if (hasSourceMap) {
+                sourceMap.combine(Math.max(0, result.length - 1), 1);
+            }
+        }
+        return result;
+    }
+
+
     // Exports
 
     Object.assign(jp, {
@@ -383,6 +420,7 @@
         convertHalfWidthKanaToFullWidth,
         convertAlphabeticToKana,
         distributeFurigana,
-        distributeFuriganaInflected
+        distributeFuriganaInflected,
+        collapseEmphaticSequences
     });
 })();
diff --git a/ext/bg/js/mecab.js b/ext/bg/js/mecab.js
index cd6e6c57..597dceae 100644
--- a/ext/bg/js/mecab.js
+++ b/ext/bg/js/mecab.js
@@ -40,7 +40,36 @@ class Mecab {
     }
 
     async parseText(text) {
-        return await this.invoke('parse_text', {text});
+        const rawResults = await this.invoke('parse_text', {text});
+        // {
+        //     'mecab-name': [
+        //         // line1
+        //         [
+        //             {str expression: 'expression', str reading: 'reading', str source: 'source'},
+        //             {str expression: 'expression2', str reading: 'reading2', str source: 'source2'}
+        //         ],
+        //         line2,
+        //         ...
+        //     ],
+        //     'mecab-name2': [...]
+        // }
+        const results = {};
+        for (const [mecabName, parsedLines] of Object.entries(rawResults)) {
+            const result = [];
+            for (const parsedLine of parsedLines) {
+                const line = [];
+                for (const {expression, reading, source} of parsedLine) {
+                    line.push({
+                        expression: expression || '',
+                        reading: reading || '',
+                        source: source || ''
+                    });
+                }
+                result.push(line);
+            }
+            results[mecabName] = result;
+        }
+        return results;
     }
 
     startListener() {
diff --git a/ext/bg/js/options.js b/ext/bg/js/options.js
index 20df2a68..f3e5f60d 100644
--- a/ext/bg/js/options.js
+++ b/ext/bg/js/options.js
@@ -170,7 +170,8 @@ function profileOptionsCreateDefaults() {
             convertNumericCharacters: 'false',
             convertAlphabeticCharacters: 'false',
             convertHiraganaToKatakana: 'false',
-            convertKatakanaToHiragana: 'variant'
+            convertKatakanaToHiragana: 'variant',
+            collapseEmphaticSequences: 'false'
         },
 
         dictionaries: {},
diff --git a/ext/bg/js/search-frontend.js b/ext/bg/js/search-frontend.js
index 9cc1436f..e534e771 100644
--- a/ext/bg/js/search-frontend.js
+++ b/ext/bg/js/search-frontend.js
@@ -19,18 +19,7 @@
  * apiOptionsGet
  */
 
-async function searchFrontendSetup() {
-    await yomichan.prepare();
-
-    const optionsContext = {
-        depth: 0,
-        url: window.location.href
-    };
-    const options = await apiOptionsGet(optionsContext);
-    if (!options.scanning.enableOnSearchPage) { return; }
-
-    window.frontendInitializationData = {depth: 1, proxy: false};
-
+function injectSearchFrontend() {
     const scriptSrcs = [
         '/mixed/js/text-scanner.js',
         '/fg/js/frontend-api-receiver.js',
@@ -62,4 +51,29 @@ async function searchFrontendSetup() {
     }
 }
 
-searchFrontendSetup();
+async function main() {
+    await yomichan.prepare();
+
+    let optionsApplied = false;
+
+    const applyOptions = async () => {
+        const optionsContext = {
+            depth: 0,
+            url: window.location.href
+        };
+        const options = await apiOptionsGet(optionsContext);
+        if (!options.scanning.enableOnSearchPage || optionsApplied) { return; }
+        optionsApplied = true;
+
+        window.frontendInitializationData = {depth: 1, proxy: false, isSearchPage: true};
+        injectSearchFrontend();
+
+        yomichan.off('optionsUpdated', applyOptions);
+    };
+
+    yomichan.on('optionsUpdated', applyOptions);
+
+    await applyOptions();
+}
+
+main();
diff --git a/ext/bg/js/search-query-parser-generator.js b/ext/bg/js/search-query-parser-generator.js
index 390841c1..9e7ff8aa 100644
--- a/ext/bg/js/search-query-parser-generator.js
+++ b/ext/bg/js/search-query-parser-generator.js
@@ -36,7 +36,7 @@ class QueryParserGenerator {
             const termContainer = this._templateHandler.instantiate(preview ? 'term-preview' : 'term');
             for (const segment of term) {
                 if (!segment.text.trim()) { continue; }
-                if (!segment.reading || !segment.reading.trim()) {
+                if (!segment.reading.trim()) {
                     termContainer.appendChild(this.createSegmentText(segment.text));
                 } else {
                     termContainer.appendChild(this.createSegment(segment));
@@ -71,7 +71,17 @@ class QueryParserGenerator {
         for (const parseResult of parseResults) {
             const optionContainer = this._templateHandler.instantiate('select-option');
             optionContainer.value = parseResult.id;
-            optionContainer.textContent = parseResult.name;
+            switch (parseResult.source) {
+                case 'scanning-parser':
+                    optionContainer.textContent = 'Scanning parser';
+                    break;
+                case 'mecab':
+                    optionContainer.textContent = `MeCab: ${parseResult.dictionary}`;
+                    break;
+                default:
+                    optionContainer.textContent = 'Unrecognized dictionary';
+                    break;
+            }
             optionContainer.defaultSelected = selectedParser === parseResult.id;
             selectContainer.appendChild(optionContainer);
         }
diff --git a/ext/bg/js/search-query-parser.js b/ext/bg/js/search-query-parser.js
index 01a0ace5..eb3b681c 100644
--- a/ext/bg/js/search-query-parser.js
+++ b/ext/bg/js/search-query-parser.js
@@ -21,13 +21,12 @@
  * apiOptionsSet
  * apiTermsFind
  * apiTextParse
- * apiTextParseMecab
  * docSentenceExtract
  */
 
 class QueryParser extends TextScanner {
     constructor({getOptionsContext, setContent, setSpinnerVisible}) {
-        super(document.querySelector('#query-parser-content'), [], []);
+        super(document.querySelector('#query-parser-content'), () => [], []);
 
         this.getOptionsContext = getOptionsContext;
         this.setContent = setContent;
@@ -128,7 +127,7 @@ class QueryParser extends TextScanner {
 
         this.setPreview(text);
 
-        this.parseResults = await this.parseText(text);
+        this.parseResults = await apiTextParse(text, this.getOptionsContext());
         this.refreshSelectedParser();
 
         this.renderParserSelect();
@@ -137,33 +136,11 @@ class QueryParser extends TextScanner {
         this.setSpinnerVisible(false);
     }
 
-    async parseText(text) {
-        const results = [];
-        if (this.options.parsing.enableScanningParser) {
-            results.push({
-                name: 'Scanning parser',
-                id: 'scan',
-                parsedText: await apiTextParse(text, this.getOptionsContext())
-            });
-        }
-        if (this.options.parsing.enableMecabParser) {
-            const mecabResults = await apiTextParseMecab(text, this.getOptionsContext());
-            for (const [mecabDictName, mecabDictResults] of mecabResults) {
-                results.push({
-                    name: `MeCab: ${mecabDictName}`,
-                    id: `mecab-${mecabDictName}`,
-                    parsedText: mecabDictResults
-                });
-            }
-        }
-        return results;
-    }
-
     setPreview(text) {
         const previewTerms = [];
         for (let i = 0, ii = text.length; i < ii; i += 2) {
             const tempText = text.substring(i, i + 2);
-            previewTerms.push([{text: tempText}]);
+            previewTerms.push([{text: tempText, reading: ''}]);
         }
         this.queryParser.textContent = '';
         this.queryParser.appendChild(this.queryParserGenerator.createParseResult(previewTerms, true));
@@ -183,6 +160,6 @@ class QueryParser extends TextScanner {
         const parseResult = this.getParseResult();
         this.queryParser.textContent = '';
         if (!parseResult) { return; }
-        this.queryParser.appendChild(this.queryParserGenerator.createParseResult(parseResult.parsedText));
+        this.queryParser.appendChild(this.queryParserGenerator.createParseResult(parseResult.content));
     }
 }
diff --git a/ext/bg/js/search.js b/ext/bg/js/search.js
index 2ba3e468..871c576b 100644
--- a/ext/bg/js/search.js
+++ b/ext/bg/js/search.js
@@ -208,7 +208,7 @@ class DisplaySearch extends Display {
 
     onCopy() {
         // ignore copy from search page
-        this.clipboardMonitor.setPreviousText(document.getSelection().toString().trim());
+        this.clipboardMonitor.setPreviousText(window.getSelection().toString().trim());
     }
 
     onExternalSearchUpdate({text}) {
diff --git a/ext/bg/js/settings/main.js b/ext/bg/js/settings/main.js
index 8fd94562..308e92eb 100644
--- a/ext/bg/js/settings/main.js
+++ b/ext/bg/js/settings/main.js
@@ -118,6 +118,7 @@ async function formRead(options) {
     options.translation.convertAlphabeticCharacters = $('#translation-convert-alphabetic-characters').val();
     options.translation.convertHiraganaToKatakana = $('#translation-convert-hiragana-to-katakana').val();
     options.translation.convertKatakanaToHiragana = $('#translation-convert-katakana-to-hiragana').val();
+    options.translation.collapseEmphaticSequences = $('#translation-collapse-emphatic-sequences').val();
 
     options.parsing.enableScanningParser = $('#parsing-scan-enable').prop('checked');
     options.parsing.enableMecabParser = $('#parsing-mecab-enable').prop('checked');
@@ -199,6 +200,7 @@ async function formWrite(options) {
     $('#translation-convert-alphabetic-characters').val(options.translation.convertAlphabeticCharacters);
     $('#translation-convert-hiragana-to-katakana').val(options.translation.convertHiraganaToKatakana);
     $('#translation-convert-katakana-to-hiragana').val(options.translation.convertKatakanaToHiragana);
+    $('#translation-collapse-emphatic-sequences').val(options.translation.collapseEmphaticSequences);
 
     $('#parsing-scan-enable').prop('checked', options.parsing.enableScanningParser);
     $('#parsing-mecab-enable').prop('checked', options.parsing.enableMecabParser);
diff --git a/ext/bg/js/translator.js b/ext/bg/js/translator.js
index e4441384..aaa1a0ec 100644
--- a/ext/bg/js/translator.js
+++ b/ext/bg/js/translator.js
@@ -347,17 +347,27 @@ class Translator {
 
     getAllDeinflections(text, options) {
         const translationOptions = options.translation;
+        const collapseEmphaticOptions = [[false, false]];
+        switch (translationOptions.collapseEmphaticSequences) {
+            case 'true':
+                collapseEmphaticOptions.push([true, false]);
+                break;
+            case 'full':
+                collapseEmphaticOptions.push([true, false], [true, true]);
+                break;
+        }
         const textOptionVariantArray = [
             Translator.getTextOptionEntryVariants(translationOptions.convertHalfWidthCharacters),
             Translator.getTextOptionEntryVariants(translationOptions.convertNumericCharacters),
             Translator.getTextOptionEntryVariants(translationOptions.convertAlphabeticCharacters),
             Translator.getTextOptionEntryVariants(translationOptions.convertHiraganaToKatakana),
-            Translator.getTextOptionEntryVariants(translationOptions.convertKatakanaToHiragana)
+            Translator.getTextOptionEntryVariants(translationOptions.convertKatakanaToHiragana),
+            collapseEmphaticOptions
         ];
 
         const deinflections = [];
         const used = new Set();
-        for (const [halfWidth, numeric, alphabetic, katakana, hiragana] of Translator.getArrayVariants(textOptionVariantArray)) {
+        for (const [halfWidth, numeric, alphabetic, katakana, hiragana, [collapseEmphatic, collapseEmphaticFull]] of Translator.getArrayVariants(textOptionVariantArray)) {
             let text2 = text;
             const sourceMap = new TextSourceMap(text2);
             if (halfWidth) {
@@ -375,6 +385,9 @@ class Translator {
             if (hiragana) {
                 text2 = jp.convertKatakanaToHiragana(text2);
             }
+            if (collapseEmphatic) {
+                text2 = jp.collapseEmphaticSequences(text2, collapseEmphaticFull, sourceMap);
+            }
 
             for (let i = text2.length; i > 0; --i) {
                 const text2Substring = text2.substring(0, i);
diff --git a/ext/bg/settings.html b/ext/bg/settings.html
index 1297a9cc..96c1db82 100644
--- a/ext/bg/settings.html
+++ b/ext/bg/settings.html
@@ -427,7 +427,7 @@
 
                 <p class="help-block">
                     The conversion options below are listed in the order that the conversions are applied to the input text.
-                    Each conversion has three possible values:
+                    Conversions commonly have three possible values:
                 </p>
 
                 <ul class="help-block">
@@ -490,6 +490,15 @@
                         <option value="variant">Use both variants</option>
                     </select>
                 </div>
+
+                <div class="form-group">
+                    <label for="translation-collapse-emphatic-sequences">Collapse emphatic character sequences <span class="label-light">(すっっごーーい &rarr; すっごーい / すごい)</span></label>
+                    <select class="form-control" id="translation-collapse-emphatic-sequences">
+                        <option value="false">Disabled</option>
+                        <option value="true">Collapse into single character</option>
+                        <option value="full">Remove all characters</option>
+                    </select>
+                </div>
             </div>
 
             <div id="popup-content-scanning">