Refactor furigana segment data (#1502)

* Remove redundant language assignment

* Segment furigana from DisplayGenerator

* Remove furiganaSegments from translator data

* Add backwards compatibility for furiganaSegments

* Update tests

4 files changed, 60 insertions, 24 deletions

diff --git a/ext/js/data/anki-note-data.js b/ext/js/data/anki-note-data.js
index a7d0f9f6..529bad18 100644
--- a/ext/js/data/anki-note-data.js
+++ b/ext/js/data/anki-note-data.js
@@ -24,7 +24,7 @@
  * The public properties and data should be backwards compatible.
  */
 class AnkiNoteData {
-    constructor({
+    constructor(japaneseUtil, marker, {
         definition,
         resultOutputMode,
         mode,
@@ -32,7 +32,8 @@ class AnkiNoteData {
         compactTags,
         context,
         injectedMedia=null
-    }, marker) {
+    }) {
+        this._japaneseUtil = japaneseUtil;
         this._definition = definition;
         this._resultOutputMode = resultOutputMode;
         this._mode = mode;
@@ -47,6 +48,7 @@ class AnkiNoteData {
         this._uniqueReadings = null;
         this._publicContext = null;
         this._cloze = null;
+        this._furiganaSegmentsCache = null;
 
         this._prepareDefinition(definition, injectedMedia, context);
     }
@@ -236,5 +238,47 @@ class AnkiNoteData {
             enumerable: true,
             get: this._getClozeCached.bind(this)
         });
+
+        for (const definition2 of this._getAllDefinitions(definition)) {
+            if (definition2.type === 'term') {
+                this._defineFuriganaSegments(definition2);
+            }
+            for (const expression of definition2.expressions) {
+                this._defineFuriganaSegments(expression);
+            }
+        }
+    }
+
+    _defineFuriganaSegments(object) {
+        Object.defineProperty(object, 'furiganaSegments', {
+            configurable: true,
+            enumerable: true,
+            get: this._getFuriganaSegments.bind(this, object)
+        });
+    }
+
+    _getFuriganaSegments(object) {
+        if (this._furiganaSegmentsCache !== null) {
+            const cachedResult = this._furiganaSegmentsCache.get(object);
+            if (typeof cachedResult !== 'undefined') { return cachedResult; }
+        } else {
+            this._furiganaSegmentsCache = new Map();
+        }
+
+        const {expression, reading} = object;
+        const result = this._japaneseUtil.distributeFurigana(expression, reading);
+        this._furiganaSegmentsCache.set(object, result);
+        return result;
+    }
+
+    _getAllDefinitions(definition) {
+        const definitions = [definition];
+        for (let i = 0; i < definitions.length; ++i) {
+            const childDefinitions = definitions[i].definitions;
+            if (Array.isArray(childDefinitions)) {
+                definitions.push(...childDefinitions);
+            }
+        }
+        return definitions;
     }
 }
diff --git a/ext/js/display/display-generator.js b/ext/js/display/display-generator.js
index d8ae566e..c0945781 100644
--- a/ext/js/display/display-generator.js
+++ b/ext/js/display/display-generator.js
@@ -190,11 +190,9 @@ class DisplayGenerator {
                 disambiguationContainer.dataset[attribute] = value;
             }
             for (const {expression, reading} of disambiguation) {
-                const segments = this._japaneseUtil.distributeFurigana(expression, reading);
                 const disambiguationItem = document.createElement('span');
                 disambiguationItem.className = 'tag-details-disambiguation';
-                disambiguationItem.lang = 'ja';
-                this._appendFurigana(disambiguationItem, segments, (container, text) => {
+                this._appendFurigana(disambiguationItem, expression, reading, (container, text) => {
                     container.appendChild(document.createTextNode(text));
                 });
                 disambiguationContainer.appendChild(disambiguationItem);
@@ -232,7 +230,7 @@ class DisplayGenerator {
     // Private
 
     _createTermExpression(details) {
-        const {termFrequency, furiganaSegments, expression, reading, termTags, pitches} = details;
+        const {termFrequency, expression, reading, termTags, pitches} = details;
 
         const searchQueries = [];
         if (expression) { searchQueries.push(expression); }
@@ -253,7 +251,7 @@ class DisplayGenerator {
 
         this._setTextContent(node.querySelector('.expression-reading'), reading);
 
-        this._appendFurigana(expressionContainer, furiganaSegments, this._appendKanjiLinks.bind(this));
+        this._appendFurigana(expressionContainer, expression, reading, this._appendKanjiLinks.bind(this));
         this._appendMultiple(tagContainer, this._createTag.bind(this), termTags);
         this._appendMultiple(tagContainer, this._createSearchTag.bind(this), searchQueries);
 
@@ -651,7 +649,6 @@ class DisplayGenerator {
     }
 
     _appendKanjiLinks(container, text) {
-        container.lang = 'ja';
         const jp = this._japaneseUtil;
         let part = '';
         for (const c of text) {
@@ -692,7 +689,9 @@ class DisplayGenerator {
         return count;
     }
 
-    _appendFurigana(container, segments, addText) {
+    _appendFurigana(container, expression, reading, addText) {
+        container.lang = 'ja';
+        const segments = this._japaneseUtil.distributeFurigana(expression, reading);
         for (const {text, furigana} of segments) {
             if (furigana) {
                 const ruby = document.createElement('ruby');
diff --git a/ext/js/language/translator.js b/ext/js/language/translator.js
index 18668306..5aa8ee9c 100644
--- a/ext/js/language/translator.js
+++ b/ext/js/language/translator.js
@@ -1080,8 +1080,7 @@ class Translator {
         this._sortTags(definitionTagsExpanded);
         this._sortTags(termTagsExpanded);
 
-        const furiganaSegments = this._japaneseUtil.distributeFurigana(expression, reading);
-        const termDetailsList = [this._createTermDetails(sourceTerm, expression, reading, furiganaSegments, termTagsExpanded)];
+        const termDetailsList = [this._createTermDetails(sourceTerm, expression, reading, termTagsExpanded)];
         const sourceTermExactMatchCount = (sourceTerm === expression ? 1 : 0);
 
         return {
@@ -1100,7 +1099,6 @@ class Translator {
             expression,
             reading,
             expressions: termDetailsList,
-            furiganaSegments,
             glossary,
             definitionTags: definitionTagsExpanded,
             termTags: termTagsExpanded,
@@ -1118,12 +1116,12 @@ class Translator {
      * @returns A single 'termGrouped' definition.
      */
     _createGroupedTermDefinition(definitions) {
-        const {reasons, source, rawSource, sourceTerm, expressions: [{expression, reading, furiganaSegments}]} = definitions[0];
+        const {reasons, source, rawSource, sourceTerm, expressions: [{expression, reading}]} = definitions[0];
         const score = this._getMaxDefinitionScore(definitions);
         const dictionaryOrder = this._getBestDictionaryOrder(definitions);
         const dictionaryNames = this._getUniqueDictionaryNames(definitions);
         const termTags = this._getUniqueTermTags(definitions);
-        const termDetailsList = [this._createTermDetails(sourceTerm, expression, reading, furiganaSegments, termTags)];
+        const termDetailsList = [this._createTermDetails(sourceTerm, expression, reading, termTags)];
         const sourceTermExactMatchCount = (sourceTerm === expression ? 1 : 0);
         return {
             type: 'termGrouped',
@@ -1141,7 +1139,6 @@ class Translator {
             expression,
             reading,
             expressions: termDetailsList,
-            furiganaSegments, // Contains duplicate data
             // glossary
             // definitionTags
             termTags,
@@ -1173,7 +1170,6 @@ class Translator {
             expression: expressions,
             reading: readings,
             expressions: termDetailsList,
-            // furiganaSegments
             // glossary
             // definitionTags
             // termTags
@@ -1221,7 +1217,6 @@ class Translator {
             expression: [...expressions],
             reading: [...readings],
             expressions: termDetailsList,
-            // furiganaSegments
             glossary: [...glossary],
             definitionTags,
             // termTags
@@ -1240,7 +1235,7 @@ class Translator {
      */
     _createTermDetailsList(definitions) {
         const termInfoMap = new Map();
-        for (const {expression, reading, sourceTerm, furiganaSegments, termTags} of definitions) {
+        for (const {expression, reading, sourceTerm, termTags} of definitions) {
             let readingMap = termInfoMap.get(expression);
             if (typeof readingMap === 'undefined') {
                 readingMap = new Map();
@@ -1251,7 +1246,6 @@ class Translator {
             if (typeof termInfo === 'undefined') {
                 termInfo = {
                     sourceTerm,
-                    furiganaSegments,
                     termTagsMap: new Map()
                 };
                 readingMap.set(reading, termInfo);
@@ -1267,22 +1261,21 @@ class Translator {
 
         const termDetailsList = [];
         for (const [expression, readingMap] of termInfoMap.entries()) {
-            for (const [reading, {termTagsMap, sourceTerm, furiganaSegments}] of readingMap.entries()) {
+            for (const [reading, {termTagsMap, sourceTerm}] of readingMap.entries()) {
                 const termTags = [...termTagsMap.values()];
                 this._sortTags(termTags);
-                termDetailsList.push(this._createTermDetails(sourceTerm, expression, reading, furiganaSegments, termTags));
+                termDetailsList.push(this._createTermDetails(sourceTerm, expression, reading, termTags));
             }
         }
         return termDetailsList;
     }
 
-    _createTermDetails(sourceTerm, expression, reading, furiganaSegments, termTags) {
+    _createTermDetails(sourceTerm, expression, reading, termTags) {
         const termFrequency = this._scoreToTermFrequency(this._getTermTagsScoreSum(termTags));
         return {
             sourceTerm,
             expression,
             reading,
-            furiganaSegments, // Contains duplicate data
             termTags,
             termFrequency,
             frequencies: [],
diff --git a/ext/js/templates/template-renderer-frame-main.js b/ext/js/templates/template-renderer-frame-main.js
index a3892002..bfa18c82 100644
--- a/ext/js/templates/template-renderer-frame-main.js
+++ b/ext/js/templates/template-renderer-frame-main.js
@@ -26,7 +26,7 @@
     const japaneseUtil = new JapaneseUtil(null);
     const templateRenderer = new TemplateRenderer(japaneseUtil);
     templateRenderer.registerDataType('ankiNote', {
-        modifier: ({data, marker}) => new AnkiNoteData(data, marker).createPublic()
+        modifier: ({data, marker}) => new AnkiNoteData(japaneseUtil, marker, data).createPublic()
     });
     const templateRendererFrameApi = new TemplateRendererFrameApi(templateRenderer);
     templateRendererFrameApi.prepare();