Pitch accent Anki field templates (#701)

* Template helper updates

* Add pitch data to exported field formatting data

* Reuse note data

* Add no-op

* Set up pitch accent templates

* Refactor version update functions

* Implement upgrade process for new Anki templates

* Consistency

* Update README and anki.js to have matching markers

10 files changed, 361 insertions, 40 deletions

diff --git a/README.md b/README.md
index 6231179c..b913fe25 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,10 @@ Flashcard fields can be configured with the following steps:
     `{furigana}` | Term expressed as kanji with furigana displayed above it (e.g. <ruby>日本語<rt>にほんご</rt></ruby>).
     `{furigana-plain}` | Term expressed as kanji with furigana displayed next to it in brackets (e.g. 日本語[にほんご]).
     `{glossary}` | List of definitions for the term (output format depends on whether running in *grouped* mode).
+    `{glossary-brief}` | List of definitions for the term in a more compact format.
+    `{pitch-accents}` | List of pitch accent downstep notations for the term.
+    `{pitch-accent-graphs}` | List of pitch accent graphs for the term.
+    `{pitch-accent-positions}` | List of accent downstep positions for the term as a number.
     `{reading}` | Kana reading for the term (empty for terms where the expression is the reading).
     `{screenshot}` | Screenshot of the web page taken at the time the term was added.
     `{sentence}` | Sentence, quote, or phrase that the term appears in from the source content.
diff --git a/ext/bg/background.html b/ext/bg/background.html
index a30b55a5..73dbc251 100644
--- a/ext/bg/background.html
+++ b/ext/bg/background.html
@@ -46,6 +46,7 @@
         <script src="/bg/js/translator.js"></script>
         <script src="/bg/js/util.js"></script>
         <script src="/mixed/js/audio-system.js"></script>
+        <script src="/mixed/js/dictionary-data-util.js"></script>
         <script src="/mixed/js/object-property-accessor.js"></script>
 
         <script src="/bg/js/background-main.js"></script>
diff --git a/ext/bg/data/anki-field-templates-upgrade-v2.handlebars b/ext/bg/data/anki-field-templates-upgrade-v2.handlebars
new file mode 100644
index 00000000..c018094e
--- /dev/null
+++ b/ext/bg/data/anki-field-templates-upgrade-v2.handlebars
@@ -0,0 +1,109 @@
+{{! Pitch Accents }}
+{{#*inline "pitch-accent-item-downstep-notation"}}
+    {{~#scope~}}
+        <span>
+        {{~#set "style1a"~}}display:inline-block;position:relative;{{~/set~}}
+        {{~#set "style1b"~}}padding-right:0.1em;margin-right:0.1em;{{~/set~}}
+        {{~#set "style2a"~}}display:block;user-select:none;pointer-events:none;position:absolute;top:0.1em;left:0;right:0;height:0;border-top:0.1em solid;{{~/set~}}
+        {{~#set "style2b"~}}right:-0.1em;height:0.4em;border-right:0.1em solid;{{~/set~}}
+        {{~#each (getKanaMorae reading)~}}
+            {{~#set "style1"}}{{#get "style1a"}}{{/get}}{{/set~}}
+            {{~#set "style2"}}{{/set~}}
+            {{~#if (isMoraPitchHigh @index ../position)}}
+                {{~#set "style2"}}{{#get "style2a"}}{{/get}}{{/set~}}
+                {{~#if (op "!" (isMoraPitchHigh (op "+" @index 1) ../position))~}}
+                    {{~#set "style1" (op "+" (get "style1") (get "style1b"))}}{{/set~}}
+                    {{~#set "style2" (op "+" (get "style2") (get "style2b"))}}{{/set~}}
+                {{~/if~}}
+            {{~/if~}}
+            <span style="{{#get "style1"}}{{/get}}">{{{.}}}<span style="{{#get "style2"}}{{/get}}"></span></span>
+        {{~/each~}}
+        </span>
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-graph-position-x"}}{{#op "+" 25 (op "*" index 50)}}{{/op}}{{/inline}}
+{{#*inline "pitch-accent-item-graph-position-y"}}{{#op "+" 25 (op "?:" (isMoraPitchHigh index position) 0 50)}}{{/op}}{{/inline}}
+{{#*inline "pitch-accent-item-graph-position"}}{{> pitch-accent-item-graph-position-x index=index position=position}} {{> pitch-accent-item-graph-position-y index=index position=position}}{{/inline}}
+{{#*inline "pitch-accent-item-graph"}}
+    {{~#scope~}}
+        {{~#set "morae" (getKanaMorae reading)}}{{/set~}}
+        {{~#set "morae-count" (property (get "morae") "length")}}{{/set~}}
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 {{#op "+" 50 (op "*" 50 (get "morae-count"))}}{{/op}} 100" style="display:inline-block;height:2em;">
+    <defs>
+        <g id="term-pitch-accent-graph-dot"><circle cx="0" cy="0" r="15" style="fill:#000;stroke:#000;stroke-width:5;" /></g>
+        <g id="term-pitch-accent-graph-dot-downstep"><circle cx="0" cy="0" r="15" style="fill:none;stroke:#000;stroke-width:5;" /><circle cx="0" cy="0" r="5" style="fill:none;stroke:#000;stroke-width:5;" /></g>
+        <g id="term-pitch-accent-graph-triangle"><path d="M0 13 L15 -13 L-15 -13 Z" style="fill:none;stroke:#000;stroke-width:5;" /></g>
+    </defs>
+    <path style="fill:none;stroke:#000;stroke-width:5;" d="
+    {{~#set "cmd" "M"}}{{/set~}}
+    {{~#each (get "morae")~}}
+        {{~#get "cmd"}}{{/get~}}
+        {{~> pitch-accent-item-graph-position index=@index position=../position~}}
+        {{~#set "cmd" "L"}}{{/set~}}
+    {{~/each~}}
+    "></path>
+    <path style="fill:none;stroke:#000;stroke-width:5;stroke-dasharray:5 5;" d="M{{> pitch-accent-item-graph-position index=(op "-" (get "morae-count") 1) position=position}} L{{> pitch-accent-item-graph-position index=(get "morae-count") position=position}}"></path>
+    {{#each (get "morae")}}
+    <use href="{{#if (op "&&" (isMoraPitchHigh @index ../position) (op "!" (isMoraPitchHigh (op "+" @index 1) ../position)))}}#term-pitch-accent-graph-dot-downstep{{else}}#term-pitch-accent-graph-dot{{/if}}" x="{{> pitch-accent-item-graph-position-x index=@index position=../position}}" y="{{> pitch-accent-item-graph-position-y index=@index position=../position}}"></use>
+    {{/each}}
+    <use href="#term-pitch-accent-graph-triangle" x="{{> pitch-accent-item-graph-position-x index=(get "morae-count") position=position}}" y="{{> pitch-accent-item-graph-position-y index=(get "morae-count") position=position}}"></use>
+</svg>
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-position"~}}
+    <span>[{{position}}]</span>
+{{~/inline}}
+
+{{#*inline "pitch-accent-item"}}
+    {{~#if (op "==" format "downstep-notation")~}}
+        {{~> pitch-accent-item-downstep-notation~}}
+    {{~else if (op "==" format "graph")~}}
+        {{~> pitch-accent-item-graph~}}
+    {{~else if (op "==" format "position")~}}
+        {{~> pitch-accent-item-position~}}
+    {{~/if~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-disambiguation"}}
+    {{~#scope~}}
+        {{~#set "exclusive" (spread exclusiveExpressions exclusiveReadings)}}{{/set~}}
+        {{~#if (op ">" (property (get "exclusive") "length") 0)~}}
+            {{~#set "separator" ""~}}{{/set~}}
+            <em>({{#each (get "exclusive")~}}
+                {{~#get "separator"}}{{/get~}}{{{.}}}
+            {{~/each}} only) </em>
+        {{~/if~}}
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-list"}}
+    {{~#if (op ">" pitchCount 0)~}}
+        {{~#if (op ">" pitchCount 1)~}}<ol>{{~/if~}}
+        {{~#each pitches~}}
+            {{~#each pitches~}}
+                {{~#if (op ">" ../../pitchCount 1)~}}<li>{{~/if~}}
+                    {{~> pitch-accent-item-disambiguation~}}
+                    {{~> pitch-accent-item format=../../format~}}
+                {{~#if (op ">" ../../pitchCount 1)~}}</li>{{~/if~}}
+            {{~/each~}}
+        {{~/each~}}
+        {{~#if (op ">" pitchCount 1)~}}</ol>{{~/if~}}
+    {{~else~}}
+        No pitch accent data
+    {{~/if~}}
+{{/inline}}
+
+{{#*inline "pitch-accents"}}
+    {{~> pitch-accent-list format='downstep-notation'~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-graphs"}}
+    {{~> pitch-accent-list format='graph'~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-positions"}}
+    {{~> pitch-accent-list format='position'~}}
+{{/inline}}
+{{! End Pitch Accents }}
diff --git a/ext/bg/data/default-anki-field-templates.handlebars b/ext/bg/data/default-anki-field-templates.handlebars
index 42deae23..b348042c 100644
--- a/ext/bg/data/default-anki-field-templates.handlebars
+++ b/ext/bg/data/default-anki-field-templates.handlebars
@@ -166,4 +166,114 @@
     {{~context.document.title~}}
 {{/inline}}
 
+{{! Pitch Accents }}
+{{#*inline "pitch-accent-item-downstep-notation"}}
+    {{~#scope~}}
+        <span>
+        {{~#set "style1a"~}}display:inline-block;position:relative;{{~/set~}}
+        {{~#set "style1b"~}}padding-right:0.1em;margin-right:0.1em;{{~/set~}}
+        {{~#set "style2a"~}}display:block;user-select:none;pointer-events:none;position:absolute;top:0.1em;left:0;right:0;height:0;border-top:0.1em solid;{{~/set~}}
+        {{~#set "style2b"~}}right:-0.1em;height:0.4em;border-right:0.1em solid;{{~/set~}}
+        {{~#each (getKanaMorae reading)~}}
+            {{~#set "style1"}}{{#get "style1a"}}{{/get}}{{/set~}}
+            {{~#set "style2"}}{{/set~}}
+            {{~#if (isMoraPitchHigh @index ../position)}}
+                {{~#set "style2"}}{{#get "style2a"}}{{/get}}{{/set~}}
+                {{~#if (op "!" (isMoraPitchHigh (op "+" @index 1) ../position))~}}
+                    {{~#set "style1" (op "+" (get "style1") (get "style1b"))}}{{/set~}}
+                    {{~#set "style2" (op "+" (get "style2") (get "style2b"))}}{{/set~}}
+                {{~/if~}}
+            {{~/if~}}
+            <span style="{{#get "style1"}}{{/get}}">{{{.}}}<span style="{{#get "style2"}}{{/get}}"></span></span>
+        {{~/each~}}
+        </span>
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-graph-position-x"}}{{#op "+" 25 (op "*" index 50)}}{{/op}}{{/inline}}
+{{#*inline "pitch-accent-item-graph-position-y"}}{{#op "+" 25 (op "?:" (isMoraPitchHigh index position) 0 50)}}{{/op}}{{/inline}}
+{{#*inline "pitch-accent-item-graph-position"}}{{> pitch-accent-item-graph-position-x index=index position=position}} {{> pitch-accent-item-graph-position-y index=index position=position}}{{/inline}}
+{{#*inline "pitch-accent-item-graph"}}
+    {{~#scope~}}
+        {{~#set "morae" (getKanaMorae reading)}}{{/set~}}
+        {{~#set "morae-count" (property (get "morae") "length")}}{{/set~}}
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 {{#op "+" 50 (op "*" 50 (get "morae-count"))}}{{/op}} 100" style="display:inline-block;height:2em;">
+    <defs>
+        <g id="term-pitch-accent-graph-dot"><circle cx="0" cy="0" r="15" style="fill:#000;stroke:#000;stroke-width:5;" /></g>
+        <g id="term-pitch-accent-graph-dot-downstep"><circle cx="0" cy="0" r="15" style="fill:none;stroke:#000;stroke-width:5;" /><circle cx="0" cy="0" r="5" style="fill:none;stroke:#000;stroke-width:5;" /></g>
+        <g id="term-pitch-accent-graph-triangle"><path d="M0 13 L15 -13 L-15 -13 Z" style="fill:none;stroke:#000;stroke-width:5;" /></g>
+    </defs>
+    <path style="fill:none;stroke:#000;stroke-width:5;" d="
+    {{~#set "cmd" "M"}}{{/set~}}
+    {{~#each (get "morae")~}}
+        {{~#get "cmd"}}{{/get~}}
+        {{~> pitch-accent-item-graph-position index=@index position=../position~}}
+        {{~#set "cmd" "L"}}{{/set~}}
+    {{~/each~}}
+    "></path>
+    <path style="fill:none;stroke:#000;stroke-width:5;stroke-dasharray:5 5;" d="M{{> pitch-accent-item-graph-position index=(op "-" (get "morae-count") 1) position=position}} L{{> pitch-accent-item-graph-position index=(get "morae-count") position=position}}"></path>
+    {{#each (get "morae")}}
+    <use href="{{#if (op "&&" (isMoraPitchHigh @index ../position) (op "!" (isMoraPitchHigh (op "+" @index 1) ../position)))}}#term-pitch-accent-graph-dot-downstep{{else}}#term-pitch-accent-graph-dot{{/if}}" x="{{> pitch-accent-item-graph-position-x index=@index position=../position}}" y="{{> pitch-accent-item-graph-position-y index=@index position=../position}}"></use>
+    {{/each}}
+    <use href="#term-pitch-accent-graph-triangle" x="{{> pitch-accent-item-graph-position-x index=(get "morae-count") position=position}}" y="{{> pitch-accent-item-graph-position-y index=(get "morae-count") position=position}}"></use>
+</svg>
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-position"~}}
+    <span>[{{position}}]</span>
+{{~/inline}}
+
+{{#*inline "pitch-accent-item"}}
+    {{~#if (op "==" format "downstep-notation")~}}
+        {{~> pitch-accent-item-downstep-notation~}}
+    {{~else if (op "==" format "graph")~}}
+        {{~> pitch-accent-item-graph~}}
+    {{~else if (op "==" format "position")~}}
+        {{~> pitch-accent-item-position~}}
+    {{~/if~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-item-disambiguation"}}
+    {{~#scope~}}
+        {{~#set "exclusive" (spread exclusiveExpressions exclusiveReadings)}}{{/set~}}
+        {{~#if (op ">" (property (get "exclusive") "length") 0)~}}
+            {{~#set "separator" ""~}}{{/set~}}
+            <em>({{#each (get "exclusive")~}}
+                {{~#get "separator"}}{{/get~}}{{{.}}}
+            {{~/each}} only) </em>
+        {{~/if~}}
+    {{~/scope~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-list"}}
+    {{~#if (op ">" pitchCount 0)~}}
+        {{~#if (op ">" pitchCount 1)~}}<ol>{{~/if~}}
+        {{~#each pitches~}}
+            {{~#each pitches~}}
+                {{~#if (op ">" ../../pitchCount 1)~}}<li>{{~/if~}}
+                    {{~> pitch-accent-item-disambiguation~}}
+                    {{~> pitch-accent-item format=../../format~}}
+                {{~#if (op ">" ../../pitchCount 1)~}}</li>{{~/if~}}
+            {{~/each~}}
+        {{~/each~}}
+        {{~#if (op ">" pitchCount 1)~}}</ol>{{~/if~}}
+    {{~else~}}
+        No pitch accent data
+    {{~/if~}}
+{{/inline}}
+
+{{#*inline "pitch-accents"}}
+    {{~> pitch-accent-list format='downstep-notation'~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-graphs"}}
+    {{~> pitch-accent-list format='graph'~}}
+{{/inline}}
+
+{{#*inline "pitch-accent-positions"}}
+    {{~> pitch-accent-list format='position'~}}
+{{/inline}}
+{{! End Pitch Accents }}
+
 {{~> (lookup . "marker") ~}}
diff --git a/ext/bg/js/anki-note-builder.js b/ext/bg/js/anki-note-builder.js
index 7fe8962a..2405543e 100644
--- a/ext/bg/js/anki-note-builder.js
+++ b/ext/bg/js/anki-note-builder.js
@@ -15,6 +15,10 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/* global
+ * DictionaryDataUtil
+ */
+
 class AnkiNoteBuilder {
     constructor({anki, audioSystem, renderTemplate}) {
         this._anki = anki;
@@ -39,9 +43,10 @@ class AnkiNoteBuilder {
             }
         };
 
+        const data = this.createNoteData(definition, mode, context, options);
         const formattedFieldValuePromises = [];
         for (const [, fieldValue] of modeOptionsFieldEntries) {
-            const formattedFieldValuePromise = this.formatField(fieldValue, definition, mode, context, options, templates, null);
+            const formattedFieldValuePromise = this.formatField(fieldValue, data, templates, null);
             formattedFieldValuePromises.push(formattedFieldValuePromise);
         }
 
@@ -55,10 +60,14 @@ class AnkiNoteBuilder {
         return note;
     }
 
-    async formatField(field, definition, mode, context, options, templates, errors=null) {
-        const data = {
+    createNoteData(definition, mode, context, options) {
+        const pitches = DictionaryDataUtil.getPitchAccentInfos(definition);
+        const pitchCount = pitches.reduce((i, v) => i + v.pitches.length, 0);
+        return {
             marker: null,
             definition,
+            pitches,
+            pitchCount,
             group: options.general.resultOutputMode === 'group',
             merge: options.general.resultOutputMode === 'merge',
             modeTermKanji: mode === 'term-kanji',
@@ -67,6 +76,9 @@ class AnkiNoteBuilder {
             compactGlossaries: options.general.compactGlossaries,
             context
         };
+    }
+
+    async formatField(field, data, templates, errors=null) {
         const pattern = /\{([\w-]+)\}/g;
         return await AnkiNoteBuilder.stringReplaceAsync(field, pattern, async (g0, marker) => {
             data.marker = marker;
diff --git a/ext/bg/js/options.js b/ext/bg/js/options.js
index ffea96f8..0d83f428 100644
--- a/ext/bg/js/options.js
+++ b/ext/bg/js/options.js
@@ -380,31 +380,83 @@ class OptionsUtil {
         return [
             {
                 async: false,
-                update: (options) => {
-                    // Version 1 changes:
-                    //  Added options.global.database.prefixWildcardsSupported = false
-                    options.global = {
-                        database: {
-                            prefixWildcardsSupported: false
-                        }
-                    };
-                    return options;
-                }
+                update: this._updateVersion1.bind(this)
             },
             {
                 async: false,
-                update: (options) => {
-                    // Version 2 changes:
-                    //  Legacy profile update process moved into this upgrade function.
-                    for (const profile of options.profiles) {
-                        if (!Array.isArray(profile.conditionGroups)) {
-                            profile.conditionGroups = [];
-                        }
-                        profile.options = this._legacyProfileUpdateUpdateVersion(profile.options);
-                    }
-                    return options;
-                }
+                update: this._updateVersion2.bind(this)
+            },
+            {
+                async: true,
+                update: this._updateVersion3.bind(this)
             }
         ];
     }
+
+    static _updateVersion1(options) {
+        // Version 1 changes:
+        //  Added options.global.database.prefixWildcardsSupported = false.
+        options.global = {
+            database: {
+                prefixWildcardsSupported: false
+            }
+        };
+        return options;
+    }
+
+    static _updateVersion2(options) {
+        // Version 2 changes:
+        //  Legacy profile update process moved into this upgrade function.
+        for (const profile of options.profiles) {
+            if (!Array.isArray(profile.conditionGroups)) {
+                profile.conditionGroups = [];
+            }
+            profile.options = this._legacyProfileUpdateUpdateVersion(profile.options);
+        }
+        return options;
+    }
+
+    static async _updateVersion3(options) {
+        // Version 3 changes:
+        //  Pitch accent Anki field templates added.
+        let addition = null;
+        for (const {options: profileOptions} of options.profiles) {
+            const fieldTemplates = profileOptions.anki.fieldTemplates;
+            if (fieldTemplates !== null) {
+                if (addition === null) {
+                    addition = await this._updateVersion3GetAnkiFieldTemplates();
+                }
+                profileOptions.anki.fieldTemplates = this._addFieldTemplatesBeforeEnd(fieldTemplates, addition);
+            }
+        }
+        return options;
+    }
+
+    static async _updateVersion3GetAnkiFieldTemplates() {
+        const url = chrome.runtime.getURL('/bg/data/anki-field-templates-upgrade-v2.handlebars');
+        const response = await fetch(url, {
+            method: 'GET',
+            mode: 'no-cors',
+            cache: 'default',
+            credentials: 'omit',
+            redirect: 'follow',
+            referrerPolicy: 'no-referrer'
+        });
+        return await response.text();
+    }
+
+    static async _addFieldTemplatesBeforeEnd(fieldTemplates, addition) {
+        const pattern = /[ \t]*\{\{~?>\s*\(\s*lookup\s*\.\s*"marker"\s*\)\s*~?\}\}/;
+        const newline = '\n';
+        let replaced = false;
+        fieldTemplates = fieldTemplates.replace(pattern, (g0) => {
+            replaced = true;
+            return `${addition}${newline}${g0}`;
+        });
+        if (!replaced) {
+            fieldTemplates += newline;
+            fieldTemplates += addition;
+        }
+        return fieldTemplates;
+    }
 }
diff --git a/ext/bg/js/settings/anki-templates.js b/ext/bg/js/settings/anki-templates.js
index 88d4fe04..4e004308 100644
--- a/ext/bg/js/settings/anki-templates.js
+++ b/ext/bg/js/settings/anki-templates.js
@@ -144,7 +144,8 @@ class AnkiTemplatesController {
                 let templates = options.anki.fieldTemplates;
                 if (typeof templates !== 'string') { templates = this._defaultFieldTemplates; }
                 const ankiNoteBuilder = new AnkiNoteBuilder({renderTemplate: api.templateRender.bind(api)});
-                result = await ankiNoteBuilder.formatField(field, definition, mode, context, options, templates, exceptions);
+                const data = ankiNoteBuilder.createNoteData(definition, mode, context, options);
+                result = await ankiNoteBuilder.formatField(field, data, templates, exceptions);
             }
         } catch (e) {
             exceptions.push(e);
diff --git a/ext/bg/js/settings/anki.js b/ext/bg/js/settings/anki.js
index 51dabba4..ac4c5455 100644
--- a/ext/bg/js/settings/anki.js
+++ b/ext/bg/js/settings/anki.js
@@ -54,6 +54,9 @@ class AnkiController {
                     'furigana-plain',
                     'glossary',
                     'glossary-brief',
+                    'pitch-accents',
+                    'pitch-accent-graphs',
+                    'pitch-accent-positions',
                     'reading',
                     'screenshot',
                     'sentence',
@@ -63,6 +66,9 @@ class AnkiController {
             case 'kanji':
                 return [
                     'character',
+                    'cloze-body',
+                    'cloze-prefix',
+                    'cloze-suffix',
                     'dictionary',
                     'document-title',
                     'glossary',
diff --git a/ext/bg/js/template-renderer.js b/ext/bg/js/template-renderer.js
index ef05cbd8..59af74c8 100644
--- a/ext/bg/js/template-renderer.js
+++ b/ext/bg/js/template-renderer.js
@@ -82,7 +82,10 @@ class TemplateRenderer {
             ['get',              this._get.bind(this)],
             ['set',              this._set.bind(this)],
             ['scope',            this._scope.bind(this)],
-            ['isMoraPitchHigh',  this._isMoraPitchHigh.bind(this)]
+            ['property',         this._property.bind(this)],
+            ['noop',             this._noop.bind(this)],
+            ['isMoraPitchHigh',  this._isMoraPitchHigh.bind(this)],
+            ['getKanaMorae',     this._getKanaMorae.bind(this)]
         ];
 
         for (const [name, helper] of helpers) {
@@ -316,21 +319,20 @@ class TemplateRenderer {
     _set(context, ...args) {
         switch (args.length) {
             case 2:
-            {
-                const [key, options] = args;
-                const value = options.fn(context);
-                this._stateStack[this._stateStack.length - 1].set(key, value);
-                return value;
-            }
+                {
+                    const [key, options] = args;
+                    const value = options.fn(context);
+                    this._stateStack[this._stateStack.length - 1].set(key, value);
+                }
+                break;
             case 3:
-            {
-                const [key, value] = args;
-                this._stateStack[this._stateStack.length - 1].set(key, value);
-                return value;
-            }
-            default:
-                return void 0;
+                {
+                    const [key, value] = args;
+                    this._stateStack[this._stateStack.length - 1].set(key, value);
+                }
+                break;
         }
+        return '';
     }
 
     _scope(context, options) {
@@ -344,7 +346,30 @@ class TemplateRenderer {
         }
     }
 
-    _isMoraPitchHigh(context, position, index) {
+    _property(context, ...args) {
+        const ii = args.length - 1;
+        if (ii <= 0) { return void 0; }
+
+        try {
+            let value = args[0];
+            for (let i = 1; i < ii; ++i) {
+                value = value[args[i]];
+            }
+            return value;
+        } catch (e) {
+            return void 0;
+        }
+    }
+
+    _noop(context, options) {
+        return options.fn(context);
+    }
+
+    _isMoraPitchHigh(context, index, position) {
         return jp.isMoraPitchHigh(index, position);
     }
+
+    _getKanaMorae(context, text) {
+        return jp.getKanaMorae(`${text}`);
+    }
 }
diff --git a/ext/bg/settings.html b/ext/bg/settings.html
index 260c1b46..e29b1f45 100644
--- a/ext/bg/settings.html
+++ b/ext/bg/settings.html
@@ -1162,6 +1162,7 @@
         <script src="/bg/js/settings/profiles.js"></script>
         <script src="/bg/js/settings/settings-controller.js"></script>
         <script src="/bg/js/settings/storage.js"></script>
+        <script src="/mixed/js/dictionary-data-util.js"></script>
         <script src="/mixed/js/object-property-accessor.js"></script>
         <script src="/mixed/js/task-accumulator.js"></script>
         <script src="/mixed/js/dom-data-binder.js"></script>